Merge tag 'for-4.20/block-20181021' of git://git.kernel.dk/linux-block

Pull block layer updates from Jens Axboe:
 "This is the main pull request for block changes for 4.20. This
  contains:

   - Series enabling runtime PM for blk-mq (Bart).

   - Two pull requests from Christoph for NVMe, with items such as;
      - Better AEN tracking
      - Multipath improvements
      - RDMA fixes
      - Rework of FC for target removal
      - Fixes for issues identified by static checkers
      - Fabric cleanups, as prep for TCP transport
      - Various cleanups and bug fixes

   - Block merging cleanups (Christoph)

   - Conversion of drivers to generic DMA mapping API (Christoph)

   - Series fixing ref count issues with blkcg (Dennis)

   - Series improving BFQ heuristics (Paolo, et al)

   - Series improving heuristics for the Kyber IO scheduler (Omar)

   - Removal of dangerous bio_rewind_iter() API (Ming)

   - Apply single queue IPI redirection logic to blk-mq (Ming)

   - Set of fixes and improvements for bcache (Coly et al)

   - Series closing a hotplug race with sysfs group attributes (Hannes)

   - Set of patches for lightnvm:
      - pblk trace support (Hans)
      - SPDX license header update (Javier)
      - Tons of refactoring patches to cleanly abstract the 1.2 and 2.0
        specs behind a common core interface. (Javier, Matias)
      - Enable pblk to use a common interface to retrieve chunk metadata
        (Matias)
      - Bug fixes (Various)

   - Set of fixes and updates to the blk IO latency target (Josef)

   - blk-mq queue number updates fixes (Jianchao)

   - Convert a bunch of drivers from the old legacy IO interface to
     blk-mq. This will conclude with the removal of the legacy IO
     interface itself in 4.21, with the rest of the drivers (me, Omar)

   - Removal of the DAC960 driver. The SCSI tree will introduce two
     replacement drivers for this (Hannes)"

* tag 'for-4.20/block-20181021' of git://git.kernel.dk/linux-block: (204 commits)
  block: setup bounce bio_sets properly
  blkcg: reassociate bios when make_request() is called recursively
  blkcg: fix edge case for blk_get_rl() under memory pressure
  nvme-fabrics: move controller options matching to fabrics
  nvme-rdma: always have a valid trsvcid
  mtip32xx: fully switch to the generic DMA API
  rsxx: switch to the generic DMA API
  umem: switch to the generic DMA API
  sx8: switch to the generic DMA API
  sx8: remove dead IF_64BIT_DMA_IS_POSSIBLE code
  skd: switch to the generic DMA API
  ubd: remove use of blk_rq_map_sg
  nvme-pci: remove duplicate check
  drivers/block: Remove DAC960 driver
  nvme-pci: fix hot removal during error handling
  nvmet-fcloop: suppress a compiler warning
  nvme-core: make implicit seed truncation explicit
  nvmet-fc: fix kernel-doc headers
  nvme-fc: rework the request initialization code
  nvme-fc: introduce struct nvme_fcp_op_w_sgl
  ...

Documentation/admin-guide/cgroup-v2.rst

@@ -1857,8 +1857,10 @@ following two functions.
 
   wbc_init_bio(@wbc, @bio)
 	Should be called for each bio carrying writeback data and
-	associates the bio with the inode's owner cgroup.  Can be
-	called anytime between bio allocation and submission.
+	associates the bio with the inode's owner cgroup and the
+	corresponding request queue.  This must be called after
+	a queue (device) has been associated with the bio and
+	before submission.
 
   wbc_account_io(@wbc, @page, @bytes)
 	Should be called for each data segment being written out.
@@ -1877,7 +1879,7 @@ the configuration, the bio may be executed at a lower priority and if
 the writeback session is holding shared resources, e.g. a journal
 entry, may lead to priority inversion.  There is no one easy solution
 for the problem.  Filesystems can try to work around specific problem
-cases by skipping wbc_init_bio() or using bio_associate_blkcg()
+cases by skipping wbc_init_bio() or using bio_associate_create_blkg()
 directly.
 
 

Documentation/blockdev/README.DAC960

@@ -1,756 +0,0 @@
-   Linux Driver for Mylex DAC960/AcceleRAID/eXtremeRAID PCI RAID Controllers
-
-			Version 2.2.11 for Linux 2.2.19
-			Version 2.4.11 for Linux 2.4.12
-
-			      PRODUCTION RELEASE
-
-				11 October 2001
-
-			       Leonard N. Zubkoff
-			       Dandelion Digital
-			       lnz@dandelion.com
-
-	 Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
-
-
-				 INTRODUCTION
-
-Mylex, Inc. designs and manufactures a variety of high performance PCI RAID
-controllers.  Mylex Corporation is located at 34551 Ardenwood Blvd., Fremont,
-California 94555, USA and can be reached at 510.796.6100 or on the World Wide
-Web at http://www.mylex.com.  Mylex Technical Support can be reached by
-electronic mail at mylexsup@us.ibm.com, by voice at 510.608.2400, or by FAX at
-510.745.7715.  Contact information for offices in Europe and Japan is available
-on their Web site.
-
-The latest information on Linux support for DAC960 PCI RAID Controllers, as
-well as the most recent release of this driver, will always be available from
-my Linux Home Page at URL "http://www.dandelion.com/Linux/".  The Linux DAC960
-driver supports all current Mylex PCI RAID controllers including the new
-eXtremeRAID 2000/3000 and AcceleRAID 352/170/160 models which have an entirely
-new firmware interface from the older eXtremeRAID 1100, AcceleRAID 150/200/250,
-and DAC960PJ/PG/PU/PD/PL.  See below for a complete controller list as well as
-minimum firmware version requirements.  For simplicity, in most places this
-documentation refers to DAC960 generically rather than explicitly listing all
-the supported models.
-
-Driver bug reports should be sent via electronic mail to "lnz@dandelion.com".
-Please include with the bug report the complete configuration messages reported
-by the driver at startup, along with any subsequent system messages relevant to
-the controller's operation, and a detailed description of your system's
-hardware configuration.  Driver bugs are actually quite rare; if you encounter
-problems with disks being marked offline, for example, please contact Mylex
-Technical Support as the problem is related to the hardware configuration
-rather than the Linux driver.
-
-Please consult the RAID controller documentation for detailed information
-regarding installation and configuration of the controllers.  This document
-primarily provides information specific to the Linux support.
-
-
-				DRIVER FEATURES
-
-The DAC960 RAID controllers are supported solely as high performance RAID
-controllers, not as interfaces to arbitrary SCSI devices.  The Linux DAC960
-driver operates at the block device level, the same level as the SCSI and IDE
-drivers.  Unlike other RAID controllers currently supported on Linux, the
-DAC960 driver is not dependent on the SCSI subsystem, and hence avoids all the
-complexity and unnecessary code that would be associated with an implementation
-as a SCSI driver.  The DAC960 driver is designed for as high a performance as
-possible with no compromises or extra code for compatibility with lower
-performance devices.  The DAC960 driver includes extensive error logging and
-online configuration management capabilities.  Except for initial configuration
-of the controller and adding new disk drives, most everything can be handled
-from Linux while the system is operational.
-
-The DAC960 driver is architected to support up to 8 controllers per system.
-Each DAC960 parallel SCSI controller can support up to 15 disk drives per
-channel, for a maximum of 60 drives on a four channel controller; the fibre
-channel eXtremeRAID 3000 controller supports up to 125 disk drives per loop for
-a total of 250 drives.  The drives installed on a controller are divided into
-one or more "Drive Groups", and then each Drive Group is subdivided further
-into 1 to 32 "Logical Drives".  Each Logical Drive has a specific RAID Level
-and caching policy associated with it, and it appears to Linux as a single
-block device.  Logical Drives are further subdivided into up to 7 partitions
-through the normal Linux and PC disk partitioning schemes.  Logical Drives are
-also known as "System Drives", and Drive Groups are also called "Packs".  Both
-terms are in use in the Mylex documentation; I have chosen to standardize on
-the more generic "Logical Drive" and "Drive Group".
-
-DAC960 RAID disk devices are named in the style of the obsolete Device File
-System (DEVFS).  The device corresponding to Logical Drive D on Controller C
-is referred to as /dev/rd/cCdD, and the partitions are called /dev/rd/cCdDp1
-through /dev/rd/cCdDp7.  For example, partition 3 of Logical Drive 5 on
-Controller 2 is referred to as /dev/rd/c2d5p3.  Note that unlike with SCSI
-disks the device names will not change in the event of a disk drive failure.
-The DAC960 driver is assigned major numbers 48 - 55 with one major number per
-controller.  The 8 bits of minor number are divided into 5 bits for the Logical
-Drive and 3 bits for the partition.
-
-
-	  SUPPORTED DAC960/AcceleRAID/eXtremeRAID PCI RAID CONTROLLERS
-
-The following list comprises the supported DAC960, AcceleRAID, and eXtremeRAID
-PCI RAID Controllers as of the date of this document.  It is recommended that
-anyone purchasing a Mylex PCI RAID Controller not in the following table
-contact the author beforehand to verify that it is or will be supported.
-
-eXtremeRAID 3000
-	    1 Wide Ultra-2/LVD SCSI channel
-	    2 External Fibre FC-AL channels
-	    233MHz StrongARM SA 110 Processor
-	    64 Bit 33MHz PCI (backward compatible with 32 Bit PCI slots)
-	    32MB/64MB ECC SDRAM Memory
-
-eXtremeRAID 2000
-	    4 Wide Ultra-160 LVD SCSI channels
-	    233MHz StrongARM SA 110 Processor
-	    64 Bit 33MHz PCI (backward compatible with 32 Bit PCI slots)
-	    32MB/64MB ECC SDRAM Memory
-
-AcceleRAID 352
-	    2 Wide Ultra-160 LVD SCSI channels
-	    100MHz Intel i960RN RISC Processor
-	    64 Bit 33MHz PCI (backward compatible with 32 Bit PCI slots)
-	    32MB/64MB ECC SDRAM Memory
-
-AcceleRAID 170
-	    1 Wide Ultra-160 LVD SCSI channel
-	    100MHz Intel i960RM RISC Processor
-	    16MB/32MB/64MB ECC SDRAM Memory
-
-AcceleRAID 160 (AcceleRAID 170LP)
-	    1 Wide Ultra-160 LVD SCSI channel
-	    100MHz Intel i960RS RISC Processor
-	    Built in 16M ECC SDRAM Memory
-	    PCI Low Profile Form Factor - fit for 2U height
-
-eXtremeRAID 1100 (DAC1164P)
-	    3 Wide Ultra-2/LVD SCSI channels
-	    233MHz StrongARM SA 110 Processor
-	    64 Bit 33MHz PCI (backward compatible with 32 Bit PCI slots)
-	    16MB/32MB/64MB Parity SDRAM Memory with Battery Backup
-
-AcceleRAID 250 (DAC960PTL1)
-	    Uses onboard Symbios SCSI chips on certain motherboards
-	    Also includes one onboard Wide Ultra-2/LVD SCSI Channel
-	    66MHz Intel i960RD RISC Processor
-	    4MB/8MB/16MB/32MB/64MB/128MB ECC EDO Memory
-
-AcceleRAID 200 (DAC960PTL0)
-	    Uses onboard Symbios SCSI chips on certain motherboards
-	    Includes no onboard SCSI Channels
-	    66MHz Intel i960RD RISC Processor
-	    4MB/8MB/16MB/32MB/64MB/128MB ECC EDO Memory
-
-AcceleRAID 150 (DAC960PRL)
-	    Uses onboard Symbios SCSI chips on certain motherboards
-	    Also includes one onboard Wide Ultra-2/LVD SCSI Channel
-	    33MHz Intel i960RP RISC Processor
-	    4MB Parity EDO Memory
-
-DAC960PJ    1/2/3 Wide Ultra SCSI-3 Channels
-	    66MHz Intel i960RD RISC Processor
-	    4MB/8MB/16MB/32MB/64MB/128MB ECC EDO Memory
-
-DAC960PG    1/2/3 Wide Ultra SCSI-3 Channels
-	    33MHz Intel i960RP RISC Processor
-	    4MB/8MB ECC EDO Memory
-
-DAC960PU    1/2/3 Wide Ultra SCSI-3 Channels
-	    Intel i960CF RISC Processor
-	    4MB/8MB EDRAM or 2MB/4MB/8MB/16MB/32MB DRAM Memory
-
-DAC960PD    1/2/3 Wide Fast SCSI-2 Channels
-	    Intel i960CF RISC Processor
-	    4MB/8MB EDRAM or 2MB/4MB/8MB/16MB/32MB DRAM Memory
-
-DAC960PL    1/2/3 Wide Fast SCSI-2 Channels
-	    Intel i960 RISC Processor
-	    2MB/4MB/8MB/16MB/32MB DRAM Memory
-
-DAC960P	    1/2/3 Wide Fast SCSI-2 Channels
-	    Intel i960 RISC Processor
-	    2MB/4MB/8MB/16MB/32MB DRAM Memory
-
-For the eXtremeRAID 2000/3000 and AcceleRAID 352/170/160, firmware version
-6.00-01 or above is required.
-
-For the eXtremeRAID 1100, firmware version 5.06-0-52 or above is required.
-
-For the AcceleRAID 250, 200, and 150, firmware version 4.06-0-57 or above is
-required.
-
-For the DAC960PJ and DAC960PG, firmware version 4.06-0-00 or above is required.
-
-For the DAC960PU, DAC960PD, DAC960PL, and DAC960P, either firmware version
-3.51-0-04 or above is required (for dual Flash ROM controllers), or firmware
-version 2.73-0-00 or above is required (for single Flash ROM controllers)
-
-Please note that not all SCSI disk drives are suitable for use with DAC960
-controllers, and only particular firmware versions of any given model may
-actually function correctly.  Similarly, not all motherboards have a BIOS that
-properly initializes the AcceleRAID 250, AcceleRAID 200, AcceleRAID 150,
-DAC960PJ, and DAC960PG because the Intel i960RD/RP is a multi-function device.
-If in doubt, contact Mylex RAID Technical Support (mylexsup@us.ibm.com) to
-verify compatibility.  Mylex makes available a hard disk compatibility list at
-http://www.mylex.com/support/hdcomp/hd-lists.html.
-
-
-			      DRIVER INSTALLATION
-
-This distribution was prepared for Linux kernel version 2.2.19 or 2.4.12.
-
-To install the DAC960 RAID driver, you may use the following commands,
-replacing "/usr/src" with wherever you keep your Linux kernel source tree:
-
-  cd /usr/src
-  tar -xvzf DAC960-2.2.11.tar.gz (or DAC960-2.4.11.tar.gz)
-  mv README.DAC960 linux/Documentation
-  mv DAC960.[ch] linux/drivers/block
-  patch -p0 < DAC960.patch (if DAC960.patch is included)
-  cd linux
-  make config
-  make bzImage (or zImage)
-
-Then install "arch/x86/boot/bzImage" or "arch/x86/boot/zImage" as your
-standard kernel, run lilo if appropriate, and reboot.
-
-To create the necessary devices in /dev, the "make_rd" script included in
-"DAC960-Utilities.tar.gz" from http://www.dandelion.com/Linux/ may be used.
-LILO 21 and FDISK v2.9 include DAC960 support; also included in this archive
-are patches to LILO 20 and FDISK v2.8 that add DAC960 support, along with
-statically linked executables of LILO and FDISK.  This modified version of LILO
-will allow booting from a DAC960 controller and/or mounting the root file
-system from a DAC960.
-
-Red Hat Linux 6.0 and SuSE Linux 6.1 include support for Mylex PCI RAID
-controllers.  Installing directly onto a DAC960 may be problematic from other
-Linux distributions until their installation utilities are updated.
-
-
-			      INSTALLATION NOTES
-
-Before installing Linux or adding DAC960 logical drives to an existing Linux
-system, the controller must first be configured to provide one or more logical
-drives using the BIOS Configuration Utility or DACCF.  Please note that since
-there are only at most 6 usable partitions on each logical drive, systems
-requiring more partitions should subdivide a drive group into multiple logical
-drives, each of which can have up to 6 usable partitions.  Also, note that with
-large disk arrays it is advisable to enable the 8GB BIOS Geometry (255/63)
-rather than accepting the default 2GB BIOS Geometry (128/32); failing to so do
-will cause the logical drive geometry to have more than 65535 cylinders which
-will make it impossible for FDISK to be used properly.  The 8GB BIOS Geometry
-can be enabled by configuring the DAC960 BIOS, which is accessible via Alt-M
-during the BIOS initialization sequence.
-
-For maximum performance and the most efficient E2FSCK performance, it is
-recommended that EXT2 file systems be built with a 4KB block size and 16 block
-stride to match the DAC960 controller's 64KB default stripe size.  The command
-"mke2fs -b 4096 -R stride=16 <device>" is appropriate.  Unless there will be a
-large number of small files on the file systems, it is also beneficial to add
-the "-i 16384" option to increase the bytes per inode parameter thereby
-reducing the file system metadata.  Finally, on systems that will only be run
-with Linux 2.2 or later kernels it is beneficial to enable sparse superblocks
-with the "-s 1" option.
-
-
-		      DAC960 ANNOUNCEMENTS MAILING LIST
-
-The DAC960 Announcements Mailing List provides a forum for informing Linux
-users of new driver releases and other announcements regarding Linux support
-for DAC960 PCI RAID Controllers.  To join the mailing list, send a message to
-"dac960-announce-request@dandelion.com" with the line "subscribe" in the
-message body.
-
-
-		CONTROLLER CONFIGURATION AND STATUS MONITORING
-
-The DAC960 RAID controllers running firmware 4.06 or above include a Background
-Initialization facility so that system downtime is minimized both for initial
-installation and subsequent configuration of additional storage.  The BIOS
-Configuration Utility (accessible via Alt-R during the BIOS initialization
-sequence) is used to quickly configure the controller, and then the logical
-drives that have been created are available for immediate use even while they
-are still being initialized by the controller.  The primary need for online
-configuration and status monitoring is then to avoid system downtime when disk
-drives fail and must be replaced.  Mylex's online monitoring and configuration
-utilities are being ported to Linux and will become available at some point in
-the future.  Note that with a SAF-TE (SCSI Accessed Fault-Tolerant Enclosure)
-enclosure, the controller is able to rebuild failed drives automatically as
-soon as a drive replacement is made available.
-
-The primary interfaces for controller configuration and status monitoring are
-special files created in the /proc/rd/... hierarchy along with the normal
-system console logging mechanism.  Whenever the system is operating, the DAC960
-driver queries each controller for status information every 10 seconds, and
-checks for additional conditions every 60 seconds.  The initial status of each
-controller is always available for controller N in /proc/rd/cN/initial_status,
-and the current status as of the last status monitoring query is available in
-/proc/rd/cN/current_status.  In addition, status changes are also logged by the
-driver to the system console and will appear in the log files maintained by
-syslog.  The progress of asynchronous rebuild or consistency check operations
-is also available in /proc/rd/cN/current_status, and progress messages are
-logged to the system console at most every 60 seconds.
-
-Starting with the 2.2.3/2.0.3 versions of the driver, the status information
-available in /proc/rd/cN/initial_status and /proc/rd/cN/current_status has been
-augmented to include the vendor, model, revision, and serial number (if
-available) for each physical device found connected to the controller:
-
-***** DAC960 RAID Driver Version 2.2.3 of 19 August 1999 *****
-Copyright 1998-1999 by Leonard N. Zubkoff <lnz@dandelion.com>
-Configuring Mylex DAC960PRL PCI RAID Controller
-  Firmware Version: 4.07-0-07, Channels: 1, Memory Size: 16MB
-  PCI Bus: 1, Device: 4, Function: 1, I/O Address: Unassigned
-  PCI Address: 0xFE300000 mapped at 0xA0800000, IRQ Channel: 21
-  Controller Queue Depth: 128, Maximum Blocks per Command: 128
-  Driver Queue Depth: 127, Maximum Scatter/Gather Segments: 33
-  Stripe Size: 64KB, Segment Size: 8KB, BIOS Geometry: 255/63
-  SAF-TE Enclosure Management Enabled
-  Physical Devices:
-    0:0  Vendor: IBM       Model: DRVS09D           Revision: 0270
-         Serial Number:       68016775HA
-         Disk Status: Online, 17928192 blocks
-    0:1  Vendor: IBM       Model: DRVS09D           Revision: 0270
-         Serial Number:       68004E53HA
-         Disk Status: Online, 17928192 blocks
-    0:2  Vendor: IBM       Model: DRVS09D           Revision: 0270
-         Serial Number:       13013935HA
-         Disk Status: Online, 17928192 blocks
-    0:3  Vendor: IBM       Model: DRVS09D           Revision: 0270
-         Serial Number:       13016897HA
-         Disk Status: Online, 17928192 blocks
-    0:4  Vendor: IBM       Model: DRVS09D           Revision: 0270
-         Serial Number:       68019905HA
-         Disk Status: Online, 17928192 blocks
-    0:5  Vendor: IBM       Model: DRVS09D           Revision: 0270
-         Serial Number:       68012753HA
-         Disk Status: Online, 17928192 blocks
-    0:6  Vendor: ESG-SHV   Model: SCA HSBP M6       Revision: 0.61
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Online, 89640960 blocks, Write Thru
-  No Rebuild or Consistency Check in Progress
-
-To simplify the monitoring process for custom software, the special file
-/proc/rd/status returns "OK" when all DAC960 controllers in the system are
-operating normally and no failures have occurred, or "ALERT" if any logical
-drives are offline or critical or any non-standby physical drives are dead.
-
-Configuration commands for controller N are available via the special file
-/proc/rd/cN/user_command.  A human readable command can be written to this
-special file to initiate a configuration operation, and the results of the
-operation can then be read back from the special file in addition to being
-logged to the system console.  The shell command sequence
-
-  echo "<configuration-command>" > /proc/rd/c0/user_command
-  cat /proc/rd/c0/user_command
-
-is typically used to execute configuration commands.  The configuration
-commands are:
-
-  flush-cache
-
-    The "flush-cache" command flushes the controller's cache.  The system
-    automatically flushes the cache at shutdown or if the driver module is
-    unloaded, so this command is only needed to be certain a write back cache
-    is flushed to disk before the system is powered off by a command to a UPS.
-    Note that the flush-cache command also stops an asynchronous rebuild or
-    consistency check, so it should not be used except when the system is being
-    halted.
-
-  kill <channel>:<target-id>
-
-    The "kill" command marks the physical drive <channel>:<target-id> as DEAD.
-    This command is provided primarily for testing, and should not be used
-    during normal system operation.
-
-  make-online <channel>:<target-id>
-
-    The "make-online" command changes the physical drive <channel>:<target-id>
-    from status DEAD to status ONLINE.  In cases where multiple physical drives
-    have been killed simultaneously, this command may be used to bring all but
-    one of them back online, after which a rebuild to the final drive is
-    necessary.
-
-    Warning: make-online should only be used on a dead physical drive that is
-    an active part of a drive group, never on a standby drive.  The command
-    should never be used on a dead drive that is part of a critical logical
-    drive; rebuild should be used if only a single drive is dead.
-
-  make-standby <channel>:<target-id>
-
-    The "make-standby" command changes physical drive <channel>:<target-id>
-    from status DEAD to status STANDBY.  It should only be used in cases where
-    a dead drive was replaced after an automatic rebuild was performed onto a
-    standby drive.  It cannot be used to add a standby drive to the controller
-    configuration if one was not created initially; the BIOS Configuration
-    Utility must be used for that currently.
-
-  rebuild <channel>:<target-id>
-
-    The "rebuild" command initiates an asynchronous rebuild onto physical drive
-    <channel>:<target-id>.  It should only be used when a dead drive has been
-    replaced.
-
-  check-consistency <logical-drive-number>
-
-    The "check-consistency" command initiates an asynchronous consistency check
-    of <logical-drive-number> with automatic restoration.  It can be used
-    whenever it is desired to verify the consistency of the redundancy
-    information.
-
-  cancel-rebuild
-  cancel-consistency-check
-
-    The "cancel-rebuild" and "cancel-consistency-check" commands cancel any
-    rebuild or consistency check operations previously initiated.
-
-
-	       EXAMPLE I - DRIVE FAILURE WITHOUT A STANDBY DRIVE
-
-The following annotated logs demonstrate the controller configuration and and
-online status monitoring capabilities of the Linux DAC960 Driver.  The test
-configuration comprises 6 1GB Quantum Atlas I disk drives on two channels of a
-DAC960PJ controller.  The physical drives are configured into a single drive
-group without a standby drive, and the drive group has been configured into two
-logical drives, one RAID-5 and one RAID-6.  Note that these logs are from an
-earlier version of the driver and the messages have changed somewhat with newer
-releases, but the functionality remains similar.  First, here is the current
-status of the RAID configuration:
-
-gwynedd:/u/lnz# cat /proc/rd/c0/current_status
-***** DAC960 RAID Driver Version 2.0.0 of 23 March 1999 *****
-Copyright 1998-1999 by Leonard N. Zubkoff <lnz@dandelion.com>
-Configuring Mylex DAC960PJ PCI RAID Controller
-  Firmware Version: 4.06-0-08, Channels: 3, Memory Size: 8MB
-  PCI Bus: 0, Device: 19, Function: 1, I/O Address: Unassigned
-  PCI Address: 0xFD4FC000 mapped at 0x8807000, IRQ Channel: 9
-  Controller Queue Depth: 128, Maximum Blocks per Command: 128
-  Driver Queue Depth: 127, Maximum Scatter/Gather Segments: 33
-  Stripe Size: 64KB, Segment Size: 8KB, BIOS Geometry: 255/63
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Online, 2201600 blocks
-    1:2 - Disk: Online, 2201600 blocks
-    1:3 - Disk: Online, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Online, 5498880 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Online, 3305472 blocks, Write Thru
-  No Rebuild or Consistency Check in Progress
-
-gwynedd:/u/lnz# cat /proc/rd/status
-OK
-
-The above messages indicate that everything is healthy, and /proc/rd/status
-returns "OK" indicating that there are no problems with any DAC960 controller
-in the system.  For demonstration purposes, while I/O is active Physical Drive
-1:1 is now disconnected, simulating a drive failure.  The failure is noted by
-the driver within 10 seconds of the controller's having detected it, and the
-driver logs the following console status messages indicating that Logical
-Drives 0 and 1 are now CRITICAL as a result of Physical Drive 1:1 being DEAD:
-
-DAC960#0: Physical Drive 1:2 Error Log: Sense Key = 6, ASC = 29, ASCQ = 02
-DAC960#0: Physical Drive 1:3 Error Log: Sense Key = 6, ASC = 29, ASCQ = 02
-DAC960#0: Physical Drive 1:1 killed because of timeout on SCSI command
-DAC960#0: Physical Drive 1:1 is now DEAD
-DAC960#0: Logical Drive 0 (/dev/rd/c0d0) is now CRITICAL
-DAC960#0: Logical Drive 1 (/dev/rd/c0d1) is now CRITICAL
-
-The Sense Keys logged here are just Check Condition / Unit Attention conditions
-arising from a SCSI bus reset that is forced by the controller during its error
-recovery procedures.  Concurrently with the above, the driver status available
-from /proc/rd also reflects the drive failure.  The status message in
-/proc/rd/status has changed from "OK" to "ALERT":
-
-gwynedd:/u/lnz# cat /proc/rd/status
-ALERT
-
-and /proc/rd/c0/current_status has been updated:
-
-gwynedd:/u/lnz# cat /proc/rd/c0/current_status
-  ...
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Dead, 2201600 blocks
-    1:2 - Disk: Online, 2201600 blocks
-    1:3 - Disk: Online, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Critical, 5498880 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Critical, 3305472 blocks, Write Thru
-  No Rebuild or Consistency Check in Progress
-
-Since there are no standby drives configured, the system can continue to access
-the logical drives in a performance degraded mode until the failed drive is
-replaced and a rebuild operation completed to restore the redundancy of the
-logical drives.  Once Physical Drive 1:1 is replaced with a properly
-functioning drive, or if the physical drive was killed without having failed
-(e.g., due to electrical problems on the SCSI bus), the user can instruct the
-controller to initiate a rebuild operation onto the newly replaced drive:
-
-gwynedd:/u/lnz# echo "rebuild 1:1" > /proc/rd/c0/user_command
-gwynedd:/u/lnz# cat /proc/rd/c0/user_command
-Rebuild of Physical Drive 1:1 Initiated
-
-The echo command instructs the controller to initiate an asynchronous rebuild
-operation onto Physical Drive 1:1, and the status message that results from the
-operation is then available for reading from /proc/rd/c0/user_command, as well
-as being logged to the console by the driver.
-
-Within 10 seconds of this command the driver logs the initiation of the
-asynchronous rebuild operation:
-
-DAC960#0: Rebuild of Physical Drive 1:1 Initiated
-DAC960#0: Physical Drive 1:1 Error Log: Sense Key = 6, ASC = 29, ASCQ = 01
-DAC960#0: Physical Drive 1:1 is now WRITE-ONLY
-DAC960#0: Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 1% completed
-
-and /proc/rd/c0/current_status is updated:
-
-gwynedd:/u/lnz# cat /proc/rd/c0/current_status
-  ...
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Write-Only, 2201600 blocks
-    1:2 - Disk: Online, 2201600 blocks
-    1:3 - Disk: Online, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Critical, 5498880 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Critical, 3305472 blocks, Write Thru
-  Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 6% completed
-
-As the rebuild progresses, the current status in /proc/rd/c0/current_status is
-updated every 10 seconds:
-
-gwynedd:/u/lnz# cat /proc/rd/c0/current_status
-  ...
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Write-Only, 2201600 blocks
-    1:2 - Disk: Online, 2201600 blocks
-    1:3 - Disk: Online, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Critical, 5498880 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Critical, 3305472 blocks, Write Thru
-  Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 15% completed
-
-and every minute a progress message is logged to the console by the driver:
-
-DAC960#0: Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 32% completed
-DAC960#0: Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 63% completed
-DAC960#0: Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 94% completed
-DAC960#0: Rebuild in Progress: Logical Drive 1 (/dev/rd/c0d1) 94% completed
-
-Finally, the rebuild completes successfully.  The driver logs the status of the 
-logical and physical drives and the rebuild completion:
-
-DAC960#0: Rebuild Completed Successfully
-DAC960#0: Physical Drive 1:1 is now ONLINE
-DAC960#0: Logical Drive 0 (/dev/rd/c0d0) is now ONLINE
-DAC960#0: Logical Drive 1 (/dev/rd/c0d1) is now ONLINE
-
-/proc/rd/c0/current_status is updated:
-
-gwynedd:/u/lnz# cat /proc/rd/c0/current_status
-  ...
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Online, 2201600 blocks
-    1:2 - Disk: Online, 2201600 blocks
-    1:3 - Disk: Online, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Online, 5498880 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Online, 3305472 blocks, Write Thru
-  Rebuild Completed Successfully
-
-and /proc/rd/status indicates that everything is healthy once again:
-
-gwynedd:/u/lnz# cat /proc/rd/status
-OK
-
-
-		EXAMPLE II - DRIVE FAILURE WITH A STANDBY DRIVE
-
-The following annotated logs demonstrate the controller configuration and and
-online status monitoring capabilities of the Linux DAC960 Driver.  The test
-configuration comprises 6 1GB Quantum Atlas I disk drives on two channels of a
-DAC960PJ controller.  The physical drives are configured into a single drive
-group with a standby drive, and the drive group has been configured into two
-logical drives, one RAID-5 and one RAID-6.  Note that these logs are from an
-earlier version of the driver and the messages have changed somewhat with newer
-releases, but the functionality remains similar.  First, here is the current
-status of the RAID configuration:
-
-gwynedd:/u/lnz# cat /proc/rd/c0/current_status
-***** DAC960 RAID Driver Version 2.0.0 of 23 March 1999 *****
-Copyright 1998-1999 by Leonard N. Zubkoff <lnz@dandelion.com>
-Configuring Mylex DAC960PJ PCI RAID Controller
-  Firmware Version: 4.06-0-08, Channels: 3, Memory Size: 8MB
-  PCI Bus: 0, Device: 19, Function: 1, I/O Address: Unassigned
-  PCI Address: 0xFD4FC000 mapped at 0x8807000, IRQ Channel: 9
-  Controller Queue Depth: 128, Maximum Blocks per Command: 128
-  Driver Queue Depth: 127, Maximum Scatter/Gather Segments: 33
-  Stripe Size: 64KB, Segment Size: 8KB, BIOS Geometry: 255/63
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Online, 2201600 blocks
-    1:2 - Disk: Online, 2201600 blocks
-    1:3 - Disk: Standby, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Online, 4399104 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Online, 2754560 blocks, Write Thru
-  No Rebuild or Consistency Check in Progress
-
-gwynedd:/u/lnz# cat /proc/rd/status
-OK
-
-The above messages indicate that everything is healthy, and /proc/rd/status
-returns "OK" indicating that there are no problems with any DAC960 controller
-in the system.  For demonstration purposes, while I/O is active Physical Drive
-1:2 is now disconnected, simulating a drive failure.  The failure is noted by
-the driver within 10 seconds of the controller's having detected it, and the
-driver logs the following console status messages:
-
-DAC960#0: Physical Drive 1:1 Error Log: Sense Key = 6, ASC = 29, ASCQ = 02
-DAC960#0: Physical Drive 1:3 Error Log: Sense Key = 6, ASC = 29, ASCQ = 02
-DAC960#0: Physical Drive 1:2 killed because of timeout on SCSI command
-DAC960#0: Physical Drive 1:2 is now DEAD
-DAC960#0: Physical Drive 1:2 killed because it was removed
-DAC960#0: Logical Drive 0 (/dev/rd/c0d0) is now CRITICAL
-DAC960#0: Logical Drive 1 (/dev/rd/c0d1) is now CRITICAL
-
-Since a standby drive is configured, the controller automatically begins
-rebuilding onto the standby drive:
-
-DAC960#0: Physical Drive 1:3 is now WRITE-ONLY
-DAC960#0: Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 4% completed
-
-Concurrently with the above, the driver status available from /proc/rd also
-reflects the drive failure and automatic rebuild.  The status message in
-/proc/rd/status has changed from "OK" to "ALERT":
-
-gwynedd:/u/lnz# cat /proc/rd/status
-ALERT
-
-and /proc/rd/c0/current_status has been updated:
-
-gwynedd:/u/lnz# cat /proc/rd/c0/current_status
-  ...
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Online, 2201600 blocks
-    1:2 - Disk: Dead, 2201600 blocks
-    1:3 - Disk: Write-Only, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Critical, 4399104 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Critical, 2754560 blocks, Write Thru
-  Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 4% completed
-
-As the rebuild progresses, the current status in /proc/rd/c0/current_status is
-updated every 10 seconds:
-
-gwynedd:/u/lnz# cat /proc/rd/c0/current_status
-  ...
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Online, 2201600 blocks
-    1:2 - Disk: Dead, 2201600 blocks
-    1:3 - Disk: Write-Only, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Critical, 4399104 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Critical, 2754560 blocks, Write Thru
-  Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 40% completed
-
-and every minute a progress message is logged on the console by the driver:
-
-DAC960#0: Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 40% completed
-DAC960#0: Rebuild in Progress: Logical Drive 0 (/dev/rd/c0d0) 76% completed
-DAC960#0: Rebuild in Progress: Logical Drive 1 (/dev/rd/c0d1) 66% completed
-DAC960#0: Rebuild in Progress: Logical Drive 1 (/dev/rd/c0d1) 84% completed
-
-Finally, the rebuild completes successfully.  The driver logs the status of the 
-logical and physical drives and the rebuild completion:
-
-DAC960#0: Rebuild Completed Successfully
-DAC960#0: Physical Drive 1:3 is now ONLINE
-DAC960#0: Logical Drive 0 (/dev/rd/c0d0) is now ONLINE
-DAC960#0: Logical Drive 1 (/dev/rd/c0d1) is now ONLINE
-
-/proc/rd/c0/current_status is updated:
-
-***** DAC960 RAID Driver Version 2.0.0 of 23 March 1999 *****
-Copyright 1998-1999 by Leonard N. Zubkoff <lnz@dandelion.com>
-Configuring Mylex DAC960PJ PCI RAID Controller
-  Firmware Version: 4.06-0-08, Channels: 3, Memory Size: 8MB
-  PCI Bus: 0, Device: 19, Function: 1, I/O Address: Unassigned
-  PCI Address: 0xFD4FC000 mapped at 0x8807000, IRQ Channel: 9
-  Controller Queue Depth: 128, Maximum Blocks per Command: 128
-  Driver Queue Depth: 127, Maximum Scatter/Gather Segments: 33
-  Stripe Size: 64KB, Segment Size: 8KB, BIOS Geometry: 255/63
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Online, 2201600 blocks
-    1:2 - Disk: Dead, 2201600 blocks
-    1:3 - Disk: Online, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Online, 4399104 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Online, 2754560 blocks, Write Thru
-  Rebuild Completed Successfully
-
-and /proc/rd/status indicates that everything is healthy once again:
-
-gwynedd:/u/lnz# cat /proc/rd/status
-OK
-
-Note that the absence of a viable standby drive does not create an "ALERT"
-status.  Once dead Physical Drive 1:2 has been replaced, the controller must be
-told that this has occurred and that the newly replaced drive should become the
-new standby drive:
-
-gwynedd:/u/lnz# echo "make-standby 1:2" > /proc/rd/c0/user_command
-gwynedd:/u/lnz# cat /proc/rd/c0/user_command
-Make Standby of Physical Drive 1:2 Succeeded
-
-The echo command instructs the controller to make Physical Drive 1:2 into a
-standby drive, and the status message that results from the operation is then
-available for reading from /proc/rd/c0/user_command, as well as being logged to
-the console by the driver.  Within 60 seconds of this command the driver logs:
-
-DAC960#0: Physical Drive 1:2 Error Log: Sense Key = 6, ASC = 29, ASCQ = 01
-DAC960#0: Physical Drive 1:2 is now STANDBY
-DAC960#0: Make Standby of Physical Drive 1:2 Succeeded
-
-and /proc/rd/c0/current_status is updated:
-
-gwynedd:/u/lnz# cat /proc/rd/c0/current_status
-  ...
-  Physical Devices:
-    0:1 - Disk: Online, 2201600 blocks
-    0:2 - Disk: Online, 2201600 blocks
-    0:3 - Disk: Online, 2201600 blocks
-    1:1 - Disk: Online, 2201600 blocks
-    1:2 - Disk: Standby, 2201600 blocks
-    1:3 - Disk: Online, 2201600 blocks
-  Logical Drives:
-    /dev/rd/c0d0: RAID-5, Online, 4399104 blocks, Write Thru
-    /dev/rd/c0d1: RAID-6, Online, 2754560 blocks, Write Thru
-  Rebuild Completed Successfully

Documentation/blockdev/zram.txt

@@ -190,7 +190,7 @@ whitespace:
  notify_free      Depending on device usage scenario it may account
                   a) the number of pages freed because of swap slot free
                   notifications or b) the number of pages freed because of
-                  REQ_DISCARD requests sent by bio. The former ones are
+                  REQ_OP_DISCARD requests sent by bio. The former ones are
                   sent to a swap block device when a swap slot is freed,
                   which implies that this disk is being used as a swap disk.
                   The latter ones are sent by filesystem mounted with

Documentation/device-mapper/log-writes.txt

@@ -38,7 +38,7 @@ inconsistent file system.
 Any REQ_FUA requests bypass this flushing mechanism and are logged as soon as
 they complete as those requests will obviously bypass the device cache.
 
-Any REQ_DISCARD requests are treated like WRITE requests.  Otherwise we would
+Any REQ_OP_DISCARD requests are treated like WRITE requests.  Otherwise we would
 have all the DISCARD requests, and then the WRITE requests and then the FLUSH
 request.  Consider the following example:
 

arch/arm/include/asm/io.h

@@ -28,7 +28,6 @@
 #include <asm/byteorder.h>
 #include <asm/memory.h>
 #include <asm-generic/pci_iomap.h>
-#include <xen/xen.h>
 
 /*
  * ISA I/O bus memory addresses are 1:1 with the physical address.
@@ -459,20 +458,6 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
 
 #include <asm-generic/io.h>
 
-/*
- * can the hardware map this into one segment or not, given no other
- * constraints.
- */
-#define BIOVEC_MERGEABLE(vec1, vec2)	\
-	((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2)))
-
-struct bio_vec;
-extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
-				      const struct bio_vec *vec2);
-#define BIOVEC_PHYS_MERGEABLE(vec1, vec2)				\
-	(__BIOVEC_PHYS_MERGEABLE(vec1, vec2) &&				\
-	 (!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2)))
-
 #ifdef CONFIG_MMU
 #define ARCH_HAS_VALID_PHYS_ADDR_RANGE
 extern int valid_phys_addr_range(phys_addr_t addr, size_t size);

arch/arm64/include/asm/io.h

@@ -31,8 +31,6 @@
 #include <asm/alternative.h>
 #include <asm/cpufeature.h>
 
-#include <xen/xen.h>
-
 /*
  * Generic IO read/write.  These perform native-endian accesses.
  */
@@ -205,12 +203,5 @@ extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
 
 extern int devmem_is_allowed(unsigned long pfn);
 
-struct bio_vec;
-extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
-				      const struct bio_vec *vec2);
-#define BIOVEC_PHYS_MERGEABLE(vec1, vec2)				\
-	(__BIOVEC_PHYS_MERGEABLE(vec1, vec2) &&				\
-	 (!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2)))
-
 #endif	/* __KERNEL__ */
 #endif	/* __ASM_IO_H */

arch/m68k/emu/nfblock.c

@@ -73,7 +73,7 @@ static blk_qc_t nfhd_make_request(struct request_queue *queue, struct bio *bio)
 		len = bvec.bv_len;
 		len >>= 9;
 		nfhd_read_write(dev->id, 0, dir, sec >> shift, len >> shift,
-				bvec_to_phys(&bvec));
+				page_to_phys(bvec.bv_page) + bvec.bv_offset);
 		sec += len;
 	}
 	bio_endio(bio);

arch/m68k/include/asm/atafd.h

@@ -1,13 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_M68K_FD_H
-#define _ASM_M68K_FD_H
-
-/* Definitions for the Atari Floppy driver */
-
-struct atari_format_descr {
-    int track;			/* to be formatted */
-    int head;			/*   ""     ""     */
-    int sect_offset;		/* offset of first sector */
-};
-
-#endif

arch/m68k/include/asm/atafdreg.h

@@ -1,80 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _LINUX_FDREG_H
-#define _LINUX_FDREG_H
-
-/*
-** WD1772 stuff
- */
-
-/* register codes */
-
-#define FDCSELREG_STP   (0x80)   /* command/status register */
-#define FDCSELREG_TRA   (0x82)   /* track register */
-#define FDCSELREG_SEC   (0x84)   /* sector register */
-#define FDCSELREG_DTA   (0x86)   /* data register */
-
-/* register names for FDC_READ/WRITE macros */
-
-#define FDCREG_CMD		0
-#define FDCREG_STATUS	0
-#define FDCREG_TRACK	2
-#define FDCREG_SECTOR	4
-#define FDCREG_DATA		6
-
-/* command opcodes */
-
-#define FDCCMD_RESTORE  (0x00)   /*  -                   */
-#define FDCCMD_SEEK     (0x10)   /*   |                  */
-#define FDCCMD_STEP     (0x20)   /*   |  TYP 1 Commands  */
-#define FDCCMD_STIN     (0x40)   /*   |                  */
-#define FDCCMD_STOT     (0x60)   /*  -                   */
-#define FDCCMD_RDSEC    (0x80)   /*  -   TYP 2 Commands  */
-#define FDCCMD_WRSEC    (0xa0)   /*  -          "        */
-#define FDCCMD_RDADR    (0xc0)   /*  -                   */
-#define FDCCMD_RDTRA    (0xe0)   /*   |  TYP 3 Commands  */
-#define FDCCMD_WRTRA    (0xf0)   /*  -                   */
-#define FDCCMD_FORCI    (0xd0)   /*  -   TYP 4 Command   */
-
-/* command modifier bits */
-
-#define FDCCMDADD_SR6   (0x00)   /* step rate settings */
-#define FDCCMDADD_SR12  (0x01)
-#define FDCCMDADD_SR2   (0x02)
-#define FDCCMDADD_SR3   (0x03)
-#define FDCCMDADD_V     (0x04)   /* verify */
-#define FDCCMDADD_H     (0x08)   /* wait for spin-up */
-#define FDCCMDADD_U     (0x10)   /* update track register */
-#define FDCCMDADD_M     (0x10)   /* multiple sector access */
-#define FDCCMDADD_E     (0x04)   /* head settling flag */
-#define FDCCMDADD_P     (0x02)   /* precompensation off */
-#define FDCCMDADD_A0    (0x01)   /* DAM flag */
-
-/* status register bits */
-
-#define	FDCSTAT_MOTORON	(0x80)   /* motor on */
-#define	FDCSTAT_WPROT	(0x40)   /* write protected (FDCCMD_WR*) */
-#define	FDCSTAT_SPINUP	(0x20)   /* motor speed stable (Type I) */
-#define	FDCSTAT_DELDAM	(0x20)   /* sector has deleted DAM (Type II+III) */
-#define	FDCSTAT_RECNF	(0x10)   /* record not found */
-#define	FDCSTAT_CRC		(0x08)   /* CRC error */
-#define	FDCSTAT_TR00	(0x04)   /* Track 00 flag (Type I) */
-#define	FDCSTAT_LOST	(0x04)   /* Lost Data (Type II+III) */
-#define	FDCSTAT_IDX		(0x02)   /* Index status (Type I) */
-#define	FDCSTAT_DRQ		(0x02)   /* DRQ status (Type II+III) */
-#define	FDCSTAT_BUSY	(0x01)   /* FDC is busy */
-
-
-/* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1  1 -> Side 2 */
-#define DSKSIDE     (0x01)
-
-#define DSKDRVNONE  (0x06)
-#define DSKDRV0     (0x02)
-#define DSKDRV1     (0x04)
-
-/* step rates */
-#define	FDCSTEP_6	0x00
-#define	FDCSTEP_12	0x01
-#define	FDCSTEP_2	0x02
-#define	FDCSTEP_3	0x03
-
-#endif

arch/um/drivers/ubd_kern.c

@@ -23,6 +23,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/ata.h>
 #include <linux/hdreg.h>
 #include <linux/cdrom.h>
@@ -142,7 +143,6 @@ struct cow {
 #define MAX_SG 64
 
 struct ubd {
-	struct list_head restart;
 	/* name (and fd, below) of the file opened for writing, either the
 	 * backing or the cow file. */
 	char *file;
@@ -156,11 +156,8 @@ struct ubd {
 	struct cow cow;
 	struct platform_device pdev;
 	struct request_queue *queue;
+	struct blk_mq_tag_set tag_set;
 	spinlock_t lock;
-	struct scatterlist sg[MAX_SG];
-	struct request *request;
-	int start_sg, end_sg;
-	sector_t rq_pos;
 };
 
 #define DEFAULT_COW { \
@@ -182,10 +179,6 @@ struct ubd {
 	.shared =		0, \
 	.cow =			DEFAULT_COW, \
 	.lock =			__SPIN_LOCK_UNLOCKED(ubd_devs.lock), \
-	.request =		NULL, \
-	.start_sg =		0, \
-	.end_sg =		0, \
-	.rq_pos =		0, \
 }
 
 /* Protected by ubd_lock */
@@ -196,6 +189,9 @@ static int fake_ide = 0;
 static struct proc_dir_entry *proc_ide_root = NULL;
 static struct proc_dir_entry *proc_ide = NULL;
 
+static blk_status_t ubd_queue_rq(struct blk_mq_hw_ctx *hctx,
+				 const struct blk_mq_queue_data *bd);
+
 static void make_proc_ide(void)
 {
 	proc_ide_root = proc_mkdir("ide", NULL);
@@ -436,11 +432,8 @@ __uml_help(udb_setup,
 "    in the boot output.\n\n"
 );
 
-static void do_ubd_request(struct request_queue * q);
-
 /* Only changed by ubd_init, which is an initcall. */
 static int thread_fd = -1;
-static LIST_HEAD(restart);
 
 /* Function to read several request pointers at a time
 * handling fractional reads if (and as) needed
@@ -498,9 +491,6 @@ static int bulk_req_safe_read(
 /* Called without dev->lock held, and only in interrupt context. */
 static void ubd_handler(void)
 {
-	struct ubd *ubd;
-	struct list_head *list, *next_ele;
-	unsigned long flags;
 	int n;
 	int count;
 
@@ -520,23 +510,17 @@ static void ubd_handler(void)
 			return;
 		}
 		for (count = 0; count < n/sizeof(struct io_thread_req *); count++) {
-			blk_end_request(
-				(*irq_req_buffer)[count]->req,
-				BLK_STS_OK,
-				(*irq_req_buffer)[count]->length
-			);
-			kfree((*irq_req_buffer)[count]);
+			struct io_thread_req *io_req = (*irq_req_buffer)[count];
+			int err = io_req->error ? BLK_STS_IOERR : BLK_STS_OK;
+
+			if (!blk_update_request(io_req->req, err, io_req->length))
+				__blk_mq_end_request(io_req->req, err);
+
+			kfree(io_req);
 		}
 	}
-	reactivate_fd(thread_fd, UBD_IRQ);
 
-	list_for_each_safe(list, next_ele, &restart){
-		ubd = container_of(list, struct ubd, restart);
-		list_del_init(&ubd->restart);
-		spin_lock_irqsave(&ubd->lock, flags);
-		do_ubd_request(ubd->queue);
-		spin_unlock_irqrestore(&ubd->lock, flags);
-	}
+	reactivate_fd(thread_fd, UBD_IRQ);
 }
 
 static irqreturn_t ubd_intr(int irq, void *dev)
@@ -857,6 +841,7 @@ static void ubd_device_release(struct device *dev)
 	struct ubd *ubd_dev = dev_get_drvdata(dev);
 
 	blk_cleanup_queue(ubd_dev->queue);
+	blk_mq_free_tag_set(&ubd_dev->tag_set);
 	*ubd_dev = ((struct ubd) DEFAULT_UBD);
 }
 
@@ -891,7 +876,7 @@ static int ubd_disk_register(int major, u64 size, int unit,
 
 	disk->private_data = &ubd_devs[unit];
 	disk->queue = ubd_devs[unit].queue;
-	device_add_disk(parent, disk);
+	device_add_disk(parent, disk, NULL);
 
 	*disk_out = disk;
 	return 0;
@@ -899,6 +884,10 @@ static int ubd_disk_register(int major, u64 size, int unit,
 
 #define ROUND_BLOCK(n) ((n + ((1 << 9) - 1)) & (-1 << 9))
 
+static const struct blk_mq_ops ubd_mq_ops = {
+	.queue_rq = ubd_queue_rq,
+};
+
 static int ubd_add(int n, char **error_out)
 {
 	struct ubd *ubd_dev = &ubd_devs[n];
@@ -915,15 +904,23 @@ static int ubd_add(int n, char **error_out)
 
 	ubd_dev->size = ROUND_BLOCK(ubd_dev->size);
 
-	INIT_LIST_HEAD(&ubd_dev->restart);
-	sg_init_table(ubd_dev->sg, MAX_SG);
+	ubd_dev->tag_set.ops = &ubd_mq_ops;
+	ubd_dev->tag_set.queue_depth = 64;
+	ubd_dev->tag_set.numa_node = NUMA_NO_NODE;
+	ubd_dev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
+	ubd_dev->tag_set.driver_data = ubd_dev;
+	ubd_dev->tag_set.nr_hw_queues = 1;
 
-	err = -ENOMEM;
-	ubd_dev->queue = blk_init_queue(do_ubd_request, &ubd_dev->lock);
-	if (ubd_dev->queue == NULL) {
-		*error_out = "Failed to initialize device queue";
+	err = blk_mq_alloc_tag_set(&ubd_dev->tag_set);
+	if (err)
 		goto out;
+
+	ubd_dev->queue = blk_mq_init_queue(&ubd_dev->tag_set);
+	if (IS_ERR(ubd_dev->queue)) {
+		err = PTR_ERR(ubd_dev->queue);
+		goto out_cleanup;
 	}
+
 	ubd_dev->queue->queuedata = ubd_dev;
 	blk_queue_write_cache(ubd_dev->queue, true, false);
 
@@ -931,7 +928,7 @@ static int ubd_add(int n, char **error_out)
 	err = ubd_disk_register(UBD_MAJOR, ubd_dev->size, n, &ubd_gendisk[n]);
 	if(err){
 		*error_out = "Failed to register device";
-		goto out_cleanup;
+		goto out_cleanup_tags;
 	}
 
 	if (fake_major != UBD_MAJOR)
@@ -949,6 +946,8 @@ static int ubd_add(int n, char **error_out)
 out:
 	return err;
 
+out_cleanup_tags:
+	blk_mq_free_tag_set(&ubd_dev->tag_set);
 out_cleanup:
 	blk_cleanup_queue(ubd_dev->queue);
 	goto out;
@@ -1290,123 +1289,82 @@ static void cowify_req(struct io_thread_req *req, unsigned long *bitmap,
 			   req->bitmap_words, bitmap_len);
 }
 
-/* Called with dev->lock held */
-static void prepare_request(struct request *req, struct io_thread_req *io_req,
-			    unsigned long long offset, int page_offset,
-			    int len, struct page *page)
+static int ubd_queue_one_vec(struct blk_mq_hw_ctx *hctx, struct request *req,
+		u64 off, struct bio_vec *bvec)
 {
-	struct gendisk *disk = req->rq_disk;
-	struct ubd *ubd_dev = disk->private_data;
-
-	io_req->req = req;
-	io_req->fds[0] = (ubd_dev->cow.file != NULL) ? ubd_dev->cow.fd :
-		ubd_dev->fd;
-	io_req->fds[1] = ubd_dev->fd;
-	io_req->cow_offset = -1;
-	io_req->offset = offset;
-	io_req->length = len;
-	io_req->error = 0;
-	io_req->sector_mask = 0;
-
-	io_req->op = (rq_data_dir(req) == READ) ? UBD_READ : UBD_WRITE;
-	io_req->offsets[0] = 0;
-	io_req->offsets[1] = ubd_dev->cow.data_offset;
-	io_req->buffer = page_address(page) + page_offset;
-	io_req->sectorsize = 1 << 9;
-
-	if(ubd_dev->cow.file != NULL)
-		cowify_req(io_req, ubd_dev->cow.bitmap,
-			   ubd_dev->cow.bitmap_offset, ubd_dev->cow.bitmap_len);
-
-}
+	struct ubd *dev = hctx->queue->queuedata;
+	struct io_thread_req *io_req;
+	int ret;
 
-/* Called with dev->lock held */
-static void prepare_flush_request(struct request *req,
-				  struct io_thread_req *io_req)
-{
-	struct gendisk *disk = req->rq_disk;
-	struct ubd *ubd_dev = disk->private_data;
+	io_req = kmalloc(sizeof(struct io_thread_req), GFP_ATOMIC);
+	if (!io_req)
+		return -ENOMEM;
 
 	io_req->req = req;
-	io_req->fds[0] = (ubd_dev->cow.file != NULL) ? ubd_dev->cow.fd :
-		ubd_dev->fd;
-	io_req->op = UBD_FLUSH;
-}
+	if (dev->cow.file)
+		io_req->fds[0] = dev->cow.fd;
+	else
+		io_req->fds[0] = dev->fd;
 
-static bool submit_request(struct io_thread_req *io_req, struct ubd *dev)
-{
-	int n = os_write_file(thread_fd, &io_req,
-			     sizeof(io_req));
-	if (n != sizeof(io_req)) {
-		if (n != -EAGAIN)
-			printk("write to io thread failed, "
-			       "errno = %d\n", -n);
-		else if (list_empty(&dev->restart))
-			list_add(&dev->restart, &restart);
+	if (req_op(req) == REQ_OP_FLUSH) {
+		io_req->op = UBD_FLUSH;
+	} else {
+		io_req->fds[1] = dev->fd;
+		io_req->cow_offset = -1;
+		io_req->offset = off;
+		io_req->length = bvec->bv_len;
+		io_req->error = 0;
+		io_req->sector_mask = 0;
+
+		io_req->op = rq_data_dir(req) == READ ? UBD_READ : UBD_WRITE;
+		io_req->offsets[0] = 0;
+		io_req->offsets[1] = dev->cow.data_offset;
+		io_req->buffer = page_address(bvec->bv_page) + bvec->bv_offset;
+		io_req->sectorsize = 1 << 9;
+
+		if (dev->cow.file) {
+			cowify_req(io_req, dev->cow.bitmap,
+				   dev->cow.bitmap_offset, dev->cow.bitmap_len);
+		}
+	}
 
+	ret = os_write_file(thread_fd, &io_req, sizeof(io_req));
+	if (ret != sizeof(io_req)) {
+		if (ret != -EAGAIN)
+			pr_err("write to io thread failed: %d\n", -ret);
 		kfree(io_req);
-		return false;
 	}
-	return true;
+
+	return ret;
 }
 
-/* Called with dev->lock held */
-static void do_ubd_request(struct request_queue *q)
+static blk_status_t ubd_queue_rq(struct blk_mq_hw_ctx *hctx,
+				 const struct blk_mq_queue_data *bd)
 {
-	struct io_thread_req *io_req;
-	struct request *req;
-
-	while(1){
-		struct ubd *dev = q->queuedata;
-		if(dev->request == NULL){
-			struct request *req = blk_fetch_request(q);
-			if(req == NULL)
-				return;
-
-			dev->request = req;
-			dev->rq_pos = blk_rq_pos(req);
-			dev->start_sg = 0;
-			dev->end_sg = blk_rq_map_sg(q, req, dev->sg);
-		}
-
-		req = dev->request;
+	struct request *req = bd->rq;
+	int ret = 0;
 
-		if (req_op(req) == REQ_OP_FLUSH) {
-			io_req = kmalloc(sizeof(struct io_thread_req),
-					 GFP_ATOMIC);
-			if (io_req == NULL) {
-				if (list_empty(&dev->restart))
-					list_add(&dev->restart, &restart);
-				return;
-			}
-			prepare_flush_request(req, io_req);
-			if (submit_request(io_req, dev) == false)
-				return;
-		}
+	blk_mq_start_request(req);
 
-		while(dev->start_sg < dev->end_sg){
-			struct scatterlist *sg = &dev->sg[dev->start_sg];
-
-			io_req = kmalloc(sizeof(struct io_thread_req),
-					 GFP_ATOMIC);
-			if(io_req == NULL){
-				if(list_empty(&dev->restart))
-					list_add(&dev->restart, &restart);
-				return;
-			}
-			prepare_request(req, io_req,
-					(unsigned long long)dev->rq_pos << 9,
-					sg->offset, sg->length, sg_page(sg));
-
-			if (submit_request(io_req, dev) == false)
-				return;
-
-			dev->rq_pos += sg->length >> 9;
-			dev->start_sg++;
+	if (req_op(req) == REQ_OP_FLUSH) {
+		ret = ubd_queue_one_vec(hctx, req, 0, NULL);
+	} else {
+		struct req_iterator iter;
+		struct bio_vec bvec;
+		u64 off = (u64)blk_rq_pos(req) << 9;
+
+		rq_for_each_segment(bvec, req, iter) {
+			ret = ubd_queue_one_vec(hctx, req, off, &bvec);
+			if (ret < 0)
+				goto out;
+			off += bvec.bv_len;
 		}
-		dev->end_sg = 0;
-		dev->request = NULL;
 	}
+out:
+	if (ret < 0) {
+		blk_mq_requeue_request(req, true);
+	}
+	return BLK_STS_OK;
 }
 
 static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo)

arch/x86/include/asm/io.h

@@ -369,18 +369,6 @@ extern void __iomem *ioremap_wt(resource_size_t offset, unsigned long size);
 
 extern bool is_early_ioremap_ptep(pte_t *ptep);
 
-#ifdef CONFIG_XEN
-#include <xen/xen.h>
-struct bio_vec;
-
-extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
-				      const struct bio_vec *vec2);
-
-#define BIOVEC_PHYS_MERGEABLE(vec1, vec2)				\
-	(__BIOVEC_PHYS_MERGEABLE(vec1, vec2) &&				\
-	 (!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2)))
-#endif	/* CONFIG_XEN */
-
 #define IO_SPACE_LIMIT 0xffff
 
 #include <asm-generic/io.h>

arch/x86/include/asm/xen/events.h

@@ -2,6 +2,8 @@
 #ifndef _ASM_X86_XEN_EVENTS_H
 #define _ASM_X86_XEN_EVENTS_H
 
+#include <xen/xen.h>
+
 enum ipi_vector {
 	XEN_RESCHEDULE_VECTOR,
 	XEN_CALL_FUNCTION_VECTOR,

arch/x86/xen/enlighten.c

@@ -5,6 +5,7 @@
 #include <linux/kexec.h>
 #include <linux/slab.h>
 
+#include <xen/xen.h>
 #include <xen/features.h>
 #include <xen/page.h>
 #include <xen/interface/memory.h>

arch/x86/xen/enlighten_pvh.c

@@ -11,6 +11,7 @@
 #include <asm/xen/interface.h>
 #include <asm/xen/hypercall.h>
 
+#include <xen/xen.h>
 #include <xen/interface/memory.h>
 #include <xen/interface/hvm/start_info.h>
 

arch/x86/xen/platform-pci-unplug.c

@@ -23,6 +23,7 @@
 #include <linux/io.h>
 #include <linux/export.h>
 
+#include <xen/xen.h>
 #include <xen/platform_pci.h>
 #include "xen-ops.h"
 

arch/x86/xen/pmu.c

@@ -3,6 +3,7 @@
 #include <linux/interrupt.h>
 
 #include <asm/xen/hypercall.h>
+#include <xen/xen.h>
 #include <xen/page.h>
 #include <xen/interface/xen.h>
 #include <xen/interface/vcpu.h>

block/Kconfig

@@ -74,7 +74,6 @@ config BLK_DEV_BSG
 
 config BLK_DEV_BSGLIB
 	bool "Block layer SG support v4 helper lib"
-	default n
 	select BLK_DEV_BSG
 	select BLK_SCSI_REQUEST
 	help
@@ -107,7 +106,6 @@ config BLK_DEV_ZONED
 config BLK_DEV_THROTTLING
 	bool "Block layer bio throttling support"
 	depends on BLK_CGROUP=y
-	default n
 	---help---
 	Block layer bio throttling support. It can be used to limit
 	the IO rate to a device. IO rate policies are per cgroup and
@@ -119,7 +117,6 @@ config BLK_DEV_THROTTLING
 config BLK_DEV_THROTTLING_LOW
 	bool "Block throttling .low limit interface support (EXPERIMENTAL)"
 	depends on BLK_DEV_THROTTLING
-	default n
 	---help---
 	Add .low limit interface for block throttling. The low limit is a best
 	effort limit to prioritize cgroups. Depending on the setting, the limit
@@ -130,7 +127,6 @@ config BLK_DEV_THROTTLING_LOW
 
 config BLK_CMDLINE_PARSER
 	bool "Block device command line partition parser"
-	default n
 	---help---
 	Enabling this option allows you to specify the partition layout from
 	the kernel boot args.  This is typically of use for embedded devices
@@ -141,7 +137,6 @@ config BLK_CMDLINE_PARSER
 
 config BLK_WBT
 	bool "Enable support for block device writeback throttling"
-	default n
 	---help---
 	Enabling this option enables the block layer to throttle buffered
 	background writeback from the VM, making it more smooth and having
@@ -152,7 +147,6 @@ config BLK_WBT
 config BLK_CGROUP_IOLATENCY
 	bool "Enable support for latency based cgroup IO protection"
 	depends on BLK_CGROUP=y
-	default n
 	---help---
 	Enabling this option enables the .latency interface for IO throttling.
 	The IO controller will attempt to maintain average IO latencies below
@@ -163,7 +157,6 @@ config BLK_CGROUP_IOLATENCY
 
 config BLK_WBT_SQ
 	bool "Single queue writeback throttling"
-	default n
 	depends on BLK_WBT
 	---help---
 	Enable writeback throttling by default on legacy single queue devices
@@ -228,4 +221,7 @@ config BLK_MQ_RDMA
 	depends on BLOCK && INFINIBAND
 	default y
 
+config BLK_PM
+	def_bool BLOCK && PM
+
 source block/Kconfig.iosched

block/Kconfig.iosched

@@ -36,7 +36,6 @@ config IOSCHED_CFQ
 config CFQ_GROUP_IOSCHED
 	bool "CFQ Group Scheduling support"
 	depends on IOSCHED_CFQ && BLK_CGROUP
-	default n
 	---help---
 	  Enable group IO scheduling in CFQ.
 
@@ -82,7 +81,6 @@ config MQ_IOSCHED_KYBER
 
 config IOSCHED_BFQ
 	tristate "BFQ I/O scheduler"
-	default n
 	---help---
 	BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of
 	of the device among all processes according to their weights,
@@ -94,7 +92,6 @@ config IOSCHED_BFQ
 config BFQ_GROUP_IOSCHED
        bool "BFQ hierarchical scheduling support"
        depends on IOSCHED_BFQ && BLK_CGROUP
-       default n
        ---help---
 
        Enable hierarchical scheduling in BFQ, using the blkio

block/Makefile

@@ -37,3 +37,4 @@ obj-$(CONFIG_BLK_WBT)		+= blk-wbt.o
 obj-$(CONFIG_BLK_DEBUG_FS)	+= blk-mq-debugfs.o
 obj-$(CONFIG_BLK_DEBUG_FS_ZONED)+= blk-mq-debugfs-zoned.o
 obj-$(CONFIG_BLK_SED_OPAL)	+= sed-opal.o
+obj-$(CONFIG_BLK_PM)		+= blk-pm.o

block/bfq-cgroup.c

@@ -642,7 +642,7 @@ void bfq_bic_update_cgroup(struct bfq_io_cq *bic, struct bio *bio)
 	uint64_t serial_nr;
 
 	rcu_read_lock();
-	serial_nr = bio_blkcg(bio)->css.serial_nr;
+	serial_nr = __bio_blkcg(bio)->css.serial_nr;
 
 	/*
 	 * Check whether blkcg has changed.  The condition may trigger
@@ -651,7 +651,7 @@ void bfq_bic_update_cgroup(struct bfq_io_cq *bic, struct bio *bio)
 	if (unlikely(!bfqd) || likely(bic->blkcg_serial_nr == serial_nr))
 		goto out;
 
-	bfqg = __bfq_bic_change_cgroup(bfqd, bic, bio_blkcg(bio));
+	bfqg = __bfq_bic_change_cgroup(bfqd, bic, __bio_blkcg(bio));
 	/*
 	 * Update blkg_path for bfq_log_* functions. We cache this
 	 * path, and update it here, for the following

block/bfq-iosched.c

@@ -624,12 +624,13 @@ void bfq_pos_tree_add_move(struct bfq_data *bfqd, struct bfq_queue *bfqq)
 }
 
 /*
- * Tell whether there are active queues or groups with differentiated weights.
+ * Tell whether there are active queues with different weights or
+ * active groups.
  */
-static bool bfq_differentiated_weights(struct bfq_data *bfqd)
+static bool bfq_varied_queue_weights_or_active_groups(struct bfq_data *bfqd)
 {
 	/*
-	 * For weights to differ, at least one of the trees must contain
+	 * For queue weights to differ, queue_weights_tree must contain
 	 * at least two nodes.
 	 */
 	return (!RB_EMPTY_ROOT(&bfqd->queue_weights_tree) &&
@@ -637,9 +638,7 @@ static bool bfq_differentiated_weights(struct bfq_data *bfqd)
 		 bfqd->queue_weights_tree.rb_node->rb_right)
 #ifdef CONFIG_BFQ_GROUP_IOSCHED
 	       ) ||
-	       (!RB_EMPTY_ROOT(&bfqd->group_weights_tree) &&
-		(bfqd->group_weights_tree.rb_node->rb_left ||
-		 bfqd->group_weights_tree.rb_node->rb_right)
+		(bfqd->num_active_groups > 0
 #endif
 	       );
 }
@@ -657,26 +656,25 @@ static bool bfq_differentiated_weights(struct bfq_data *bfqd)
  * 3) all active groups at the same level in the groups tree have the same
  *    number of children.
  *
- * Unfortunately, keeping the necessary state for evaluating exactly the
- * above symmetry conditions would be quite complex and time-consuming.
- * Therefore this function evaluates, instead, the following stronger
- * sub-conditions, for which it is much easier to maintain the needed
- * state:
+ * Unfortunately, keeping the necessary state for evaluating exactly
+ * the last two symmetry sub-conditions above would be quite complex
+ * and time consuming.  Therefore this function evaluates, instead,
+ * only the following stronger two sub-conditions, for which it is
+ * much easier to maintain the needed state:
  * 1) all active queues have the same weight,
- * 2) all active groups have the same weight,
- * 3) all active groups have at most one active child each.
- * In particular, the last two conditions are always true if hierarchical
- * support and the cgroups interface are not enabled, thus no state needs
- * to be maintained in this case.
+ * 2) there are no active groups.
+ * In particular, the last condition is always true if hierarchical
+ * support or the cgroups interface are not enabled, thus no state
+ * needs to be maintained in this case.
  */
 static bool bfq_symmetric_scenario(struct bfq_data *bfqd)
 {
-	return !bfq_differentiated_weights(bfqd);
+	return !bfq_varied_queue_weights_or_active_groups(bfqd);
 }
 
 /*
  * If the weight-counter tree passed as input contains no counter for
- * the weight of the input entity, then add that counter; otherwise just
+ * the weight of the input queue, then add that counter; otherwise just
  * increment the existing counter.
  *
  * Note that weight-counter trees contain few nodes in mostly symmetric
@@ -687,25 +685,25 @@ static bool bfq_symmetric_scenario(struct bfq_data *bfqd)
  * In most scenarios, the rate at which nodes are created/destroyed
  * should be low too.
  */
-void bfq_weights_tree_add(struct bfq_data *bfqd, struct bfq_entity *entity,
+void bfq_weights_tree_add(struct bfq_data *bfqd, struct bfq_queue *bfqq,
 			  struct rb_root *root)
 {
+	struct bfq_entity *entity = &bfqq->entity;
 	struct rb_node **new = &(root->rb_node), *parent = NULL;
 
 	/*
-	 * Do not insert if the entity is already associated with a
+	 * Do not insert if the queue is already associated with a
 	 * counter, which happens if:
-	 *   1) the entity is associated with a queue,
-	 *   2) a request arrival has caused the queue to become both
+	 *   1) a request arrival has caused the queue to become both
 	 *      non-weight-raised, and hence change its weight, and
 	 *      backlogged; in this respect, each of the two events
 	 *      causes an invocation of this function,
-	 *   3) this is the invocation of this function caused by the
+	 *   2) this is the invocation of this function caused by the
 	 *      second event. This second invocation is actually useless,
 	 *      and we handle this fact by exiting immediately. More
 	 *      efficient or clearer solutions might possibly be adopted.
 	 */
-	if (entity->weight_counter)
+	if (bfqq->weight_counter)
 		return;
 
 	while (*new) {
@@ -715,7 +713,7 @@ void bfq_weights_tree_add(struct bfq_data *bfqd, struct bfq_entity *entity,
 		parent = *new;
 
 		if (entity->weight == __counter->weight) {
-			entity->weight_counter = __counter;
+			bfqq->weight_counter = __counter;
 			goto inc_counter;
 		}
 		if (entity->weight < __counter->weight)
@@ -724,66 +722,67 @@ void bfq_weights_tree_add(struct bfq_data *bfqd, struct bfq_entity *entity,
 			new = &((*new)->rb_right);
 	}
 
-	entity->weight_counter = kzalloc(sizeof(struct bfq_weight_counter),
-					 GFP_ATOMIC);
+	bfqq->weight_counter = kzalloc(sizeof(struct bfq_weight_counter),
+				       GFP_ATOMIC);
 
 	/*
 	 * In the unlucky event of an allocation failure, we just
-	 * exit. This will cause the weight of entity to not be
-	 * considered in bfq_differentiated_weights, which, in its
-	 * turn, causes the scenario to be deemed wrongly symmetric in
-	 * case entity's weight would have been the only weight making
-	 * the scenario asymmetric. On the bright side, no unbalance
-	 * will however occur when entity becomes inactive again (the
-	 * invocation of this function is triggered by an activation
-	 * of entity). In fact, bfq_weights_tree_remove does nothing
-	 * if !entity->weight_counter.
+	 * exit. This will cause the weight of queue to not be
+	 * considered in bfq_varied_queue_weights_or_active_groups,
+	 * which, in its turn, causes the scenario to be deemed
+	 * wrongly symmetric in case bfqq's weight would have been
+	 * the only weight making the scenario asymmetric.  On the
+	 * bright side, no unbalance will however occur when bfqq
+	 * becomes inactive again (the invocation of this function
+	 * is triggered by an activation of queue).  In fact,
+	 * bfq_weights_tree_remove does nothing if
+	 * !bfqq->weight_counter.
 	 */
-	if (unlikely(!entity->weight_counter))
+	if (unlikely(!bfqq->weight_counter))
 		return;
 
-	entity->weight_counter->weight = entity->weight;
-	rb_link_node(&entity->weight_counter->weights_node, parent, new);
-	rb_insert_color(&entity->weight_counter->weights_node, root);
+	bfqq->weight_counter->weight = entity->weight;
+	rb_link_node(&bfqq->weight_counter->weights_node, parent, new);
+	rb_insert_color(&bfqq->weight_counter->weights_node, root);
 
 inc_counter:
-	entity->weight_counter->num_active++;
+	bfqq->weight_counter->num_active++;
 }
 
 /*
- * Decrement the weight counter associated with the entity, and, if the
+ * Decrement the weight counter associated with the queue, and, if the
  * counter reaches 0, remove the counter from the tree.
  * See the comments to the function bfq_weights_tree_add() for considerations
  * about overhead.
  */
 void __bfq_weights_tree_remove(struct bfq_data *bfqd,
-			       struct bfq_entity *entity,
+			       struct bfq_queue *bfqq,
 			       struct rb_root *root)
 {
-	if (!entity->weight_counter)
+	if (!bfqq->weight_counter)
 		return;
 
-	entity->weight_counter->num_active--;
-	if (entity->weight_counter->num_active > 0)
+	bfqq->weight_counter->num_active--;
+	if (bfqq->weight_counter->num_active > 0)
 		goto reset_entity_pointer;
 
-	rb_erase(&entity->weight_counter->weights_node, root);
-	kfree(entity->weight_counter);
+	rb_erase(&bfqq->weight_counter->weights_node, root);
+	kfree(bfqq->weight_counter);
 
 reset_entity_pointer:
-	entity->weight_counter = NULL;
+	bfqq->weight_counter = NULL;
 }
 
 /*
- * Invoke __bfq_weights_tree_remove on bfqq and all its inactive
- * parent entities.
+ * Invoke __bfq_weights_tree_remove on bfqq and decrement the number
+ * of active groups for each queue's inactive parent entity.
  */
 void bfq_weights_tree_remove(struct bfq_data *bfqd,
 			     struct bfq_queue *bfqq)
 {
 	struct bfq_entity *entity = bfqq->entity.parent;
 
-	__bfq_weights_tree_remove(bfqd, &bfqq->entity,
+	__bfq_weights_tree_remove(bfqd, bfqq,
 				  &bfqd->queue_weights_tree);
 
 	for_each_entity(entity) {
@@ -797,17 +796,13 @@ void bfq_weights_tree_remove(struct bfq_data *bfqd,
 			 * next_in_service for details on why
 			 * in_service_entity must be checked too).
 			 *
-			 * As a consequence, the weight of entity is
-			 * not to be removed. In addition, if entity
-			 * is active, then its parent entities are
-			 * active as well, and thus their weights are
-			 * not to be removed either. In the end, this
-			 * loop must stop here.
+			 * As a consequence, its parent entities are
+			 * active as well, and thus this loop must
+			 * stop here.
 			 */
 			break;
 		}
-		__bfq_weights_tree_remove(bfqd, entity,
-					  &bfqd->group_weights_tree);
+		bfqd->num_active_groups--;
 	}
 }
 
@@ -3182,6 +3177,13 @@ static unsigned long bfq_bfqq_softrt_next_start(struct bfq_data *bfqd,
 		    jiffies + nsecs_to_jiffies(bfqq->bfqd->bfq_slice_idle) + 4);
 }
 
+static bool bfq_bfqq_injectable(struct bfq_queue *bfqq)
+{
+	return BFQQ_SEEKY(bfqq) && bfqq->wr_coeff == 1 &&
+		blk_queue_nonrot(bfqq->bfqd->queue) &&
+		bfqq->bfqd->hw_tag;
+}
+
 /**
  * bfq_bfqq_expire - expire a queue.
  * @bfqd: device owning the queue.
@@ -3291,6 +3293,8 @@ void bfq_bfqq_expire(struct bfq_data *bfqd,
 	if (ref == 1) /* bfqq is gone, no more actions on it */
 		return;
 
+	bfqq->injected_service = 0;
+
 	/* mark bfqq as waiting a request only if a bic still points to it */
 	if (!bfq_bfqq_busy(bfqq) &&
 	    reason != BFQQE_BUDGET_TIMEOUT &&
@@ -3497,9 +3501,11 @@ static bool bfq_better_to_idle(struct bfq_queue *bfqq)
 	 * symmetric scenario where:
 	 * (i)  each of these processes must get the same throughput as
 	 *      the others;
-	 * (ii) all these processes have the same I/O pattern
-		(either sequential or random).
-	 * In fact, in such a scenario, the drive will tend to treat
+	 * (ii) the I/O of each process has the same properties, in
+	 *      terms of locality (sequential or random), direction
+	 *      (reads or writes), request sizes, greediness
+	 *      (from I/O-bound to sporadic), and so on.
+	 * In fact, in such a scenario, the drive tends to treat
 	 * the requests of each of these processes in about the same
 	 * way as the requests of the others, and thus to provide
 	 * each of these processes with about the same throughput
@@ -3508,18 +3514,50 @@ static bool bfq_better_to_idle(struct bfq_queue *bfqq)
 	 * certainly needed to guarantee that bfqq receives its
 	 * assigned fraction of the device throughput (see [1] for
 	 * details).
+	 * The problem is that idling may significantly reduce
+	 * throughput with certain combinations of types of I/O and
+	 * devices. An important example is sync random I/O, on flash
+	 * storage with command queueing. So, unless bfqq falls in the
+	 * above cases where idling also boosts throughput, it would
+	 * be important to check conditions (i) and (ii) accurately,
+	 * so as to avoid idling when not strictly needed for service
+	 * guarantees.
+	 *
+	 * Unfortunately, it is extremely difficult to thoroughly
+	 * check condition (ii). And, in case there are active groups,
+	 * it becomes very difficult to check condition (i) too. In
+	 * fact, if there are active groups, then, for condition (i)
+	 * to become false, it is enough that an active group contains
+	 * more active processes or sub-groups than some other active
+	 * group. We address this issue with the following bi-modal
+	 * behavior, implemented in the function
+	 * bfq_symmetric_scenario().
 	 *
-	 * We address this issue by controlling, actually, only the
-	 * symmetry sub-condition (i), i.e., provided that
-	 * sub-condition (i) holds, idling is not performed,
-	 * regardless of whether sub-condition (ii) holds. In other
-	 * words, only if sub-condition (i) holds, then idling is
+	 * If there are active groups, then the scenario is tagged as
+	 * asymmetric, conservatively, without checking any of the
+	 * conditions (i) and (ii). So the device is idled for bfqq.
+	 * This behavior matches also the fact that groups are created
+	 * exactly if controlling I/O (to preserve bandwidth and
+	 * latency guarantees) is a primary concern.
+	 *
+	 * On the opposite end, if there are no active groups, then
+	 * only condition (i) is actually controlled, i.e., provided
+	 * that condition (i) holds, idling is not performed,
+	 * regardless of whether condition (ii) holds. In other words,
+	 * only if condition (i) does not hold, then idling is
 	 * allowed, and the device tends to be prevented from queueing
-	 * many requests, possibly of several processes. The reason
-	 * for not controlling also sub-condition (ii) is that we
-	 * exploit preemption to preserve guarantees in case of
-	 * symmetric scenarios, even if (ii) does not hold, as
-	 * explained in the next two paragraphs.
+	 * many requests, possibly of several processes. Since there
+	 * are no active groups, then, to control condition (i) it is
+	 * enough to check whether all active queues have the same
+	 * weight.
+	 *
+	 * Not checking condition (ii) evidently exposes bfqq to the
+	 * risk of getting less throughput than its fair share.
+	 * However, for queues with the same weight, a further
+	 * mechanism, preemption, mitigates or even eliminates this
+	 * problem. And it does so without consequences on overall
+	 * throughput. This mechanism and its benefits are explained
+	 * in the next three paragraphs.
 	 *
 	 * Even if a queue, say Q, is expired when it remains idle, Q
 	 * can still preempt the new in-service queue if the next
@@ -3533,11 +3571,7 @@ static bool bfq_better_to_idle(struct bfq_queue *bfqq)
 	 * idling allows the internal queues of the device to contain
 	 * many requests, and thus to reorder requests, we can rather
 	 * safely assume that the internal scheduler still preserves a
-	 * minimum of mid-term fairness. The motivation for using
-	 * preemption instead of idling is that, by not idling,
-	 * service guarantees are preserved without minimally
-	 * sacrificing throughput. In other words, both a high
-	 * throughput and its desired distribution are obtained.
+	 * minimum of mid-term fairness.
 	 *
 	 * More precisely, this preemption-based, idleless approach
 	 * provides fairness in terms of IOPS, and not sectors per
@@ -3556,22 +3590,27 @@ static bool bfq_better_to_idle(struct bfq_queue *bfqq)
 	 * 1024/8 times as high as the service received by the other
 	 * queue.
 	 *
-	 * On the other hand, device idling is performed, and thus
-	 * pure sector-domain guarantees are provided, for the
-	 * following queues, which are likely to need stronger
-	 * throughput guarantees: weight-raised queues, and queues
-	 * with a higher weight than other queues. When such queues
-	 * are active, sub-condition (i) is false, which triggers
-	 * device idling.
+	 * The motivation for using preemption instead of idling (for
+	 * queues with the same weight) is that, by not idling,
+	 * service guarantees are preserved (completely or at least in
+	 * part) without minimally sacrificing throughput. And, if
+	 * there is no active group, then the primary expectation for
+	 * this device is probably a high throughput.
 	 *
-	 * According to the above considerations, the next variable is
-	 * true (only) if sub-condition (i) holds. To compute the
-	 * value of this variable, we not only use the return value of
-	 * the function bfq_symmetric_scenario(), but also check
-	 * whether bfqq is being weight-raised, because
-	 * bfq_symmetric_scenario() does not take into account also
-	 * weight-raised queues (see comments on
-	 * bfq_weights_tree_add()).
+	 * We are now left only with explaining the additional
+	 * compound condition that is checked below for deciding
+	 * whether the scenario is asymmetric. To explain this
+	 * compound condition, we need to add that the function
+	 * bfq_symmetric_scenario checks the weights of only
+	 * non-weight-raised queues, for efficiency reasons (see
+	 * comments on bfq_weights_tree_add()). Then the fact that
+	 * bfqq is weight-raised is checked explicitly here. More
+	 * precisely, the compound condition below takes into account
+	 * also the fact that, even if bfqq is being weight-raised,
+	 * the scenario is still symmetric if all active queues happen
+	 * to be weight-raised. Actually, we should be even more
+	 * precise here, and differentiate between interactive weight
+	 * raising and soft real-time weight raising.
 	 *
 	 * As a side note, it is worth considering that the above
 	 * device-idling countermeasures may however fail in the
@@ -3583,7 +3622,8 @@ static bool bfq_better_to_idle(struct bfq_queue *bfqq)
 	 * to let requests be served in the desired order until all
 	 * the requests already queued in the device have been served.
 	 */
-	asymmetric_scenario = bfqq->wr_coeff > 1 ||
+	asymmetric_scenario = (bfqq->wr_coeff > 1 &&
+			       bfqd->wr_busy_queues < bfqd->busy_queues) ||
 		!bfq_symmetric_scenario(bfqd);
 
 	/*
@@ -3629,6 +3669,30 @@ static bool bfq_bfqq_must_idle(struct bfq_queue *bfqq)
 	return RB_EMPTY_ROOT(&bfqq->sort_list) && bfq_better_to_idle(bfqq);
 }
 
+static struct bfq_queue *bfq_choose_bfqq_for_injection(struct bfq_data *bfqd)
+{
+	struct bfq_queue *bfqq;
+
+	/*
+	 * A linear search; but, with a high probability, very few
+	 * steps are needed to find a candidate queue, i.e., a queue
+	 * with enough budget left for its next request. In fact:
+	 * - BFQ dynamically updates the budget of every queue so as
+	 *   to accommodate the expected backlog of the queue;
+	 * - if a queue gets all its requests dispatched as injected
+	 *   service, then the queue is removed from the active list
+	 *   (and re-added only if it gets new requests, but with
+	 *   enough budget for its new backlog).
+	 */
+	list_for_each_entry(bfqq, &bfqd->active_list, bfqq_list)
+		if (!RB_EMPTY_ROOT(&bfqq->sort_list) &&
+		    bfq_serv_to_charge(bfqq->next_rq, bfqq) <=
+		    bfq_bfqq_budget_left(bfqq))
+			return bfqq;
+
+	return NULL;
+}
+
 /*
  * Select a queue for service.  If we have a current queue in service,
  * check whether to continue servicing it, or retrieve and set a new one.
@@ -3710,10 +3774,19 @@ check_queue:
 	 * No requests pending. However, if the in-service queue is idling
 	 * for a new request, or has requests waiting for a completion and
 	 * may idle after their completion, then keep it anyway.
+	 *
+	 * Yet, to boost throughput, inject service from other queues if
+	 * possible.
 	 */
 	if (bfq_bfqq_wait_request(bfqq) ||
 	    (bfqq->dispatched != 0 && bfq_better_to_idle(bfqq))) {
-		bfqq = NULL;
+		if (bfq_bfqq_injectable(bfqq) &&
+		    bfqq->injected_service * bfqq->inject_coeff <
+		    bfqq->entity.service * 10)
+			bfqq = bfq_choose_bfqq_for_injection(bfqd);
+		else
+			bfqq = NULL;
+
 		goto keep_queue;
 	}
 
@@ -3803,6 +3876,14 @@ static struct request *bfq_dispatch_rq_from_bfqq(struct bfq_data *bfqd,
 
 	bfq_dispatch_remove(bfqd->queue, rq);
 
+	if (bfqq != bfqd->in_service_queue) {
+		if (likely(bfqd->in_service_queue))
+			bfqd->in_service_queue->injected_service +=
+				bfq_serv_to_charge(rq, bfqq);
+
+		goto return_rq;
+	}
+
 	/*
 	 * If weight raising has to terminate for bfqq, then next
 	 * function causes an immediate update of bfqq's weight,
@@ -3821,13 +3902,12 @@ static struct request *bfq_dispatch_rq_from_bfqq(struct bfq_data *bfqd,
 	 * belongs to CLASS_IDLE and other queues are waiting for
 	 * service.
 	 */
-	if (bfqd->busy_queues > 1 && bfq_class_idle(bfqq))
-		goto expire;
-
-	return rq;
+	if (!(bfqd->busy_queues > 1 && bfq_class_idle(bfqq)))
+		goto return_rq;
 
-expire:
 	bfq_bfqq_expire(bfqd, bfqq, false, BFQQE_BUDGET_EXHAUSTED);
+
+return_rq:
 	return rq;
 }
 
@@ -4232,6 +4312,13 @@ static void bfq_init_bfqq(struct bfq_data *bfqd, struct bfq_queue *bfqq,
 			bfq_mark_bfqq_has_short_ttime(bfqq);
 		bfq_mark_bfqq_sync(bfqq);
 		bfq_mark_bfqq_just_created(bfqq);
+		/*
+		 * Aggressively inject a lot of service: up to 90%.
+		 * This coefficient remains constant during bfqq life,
+		 * but this behavior might be changed, after enough
+		 * testing and tuning.
+		 */
+		bfqq->inject_coeff = 1;
 	} else
 		bfq_clear_bfqq_sync(bfqq);
 
@@ -4297,7 +4384,7 @@ static struct bfq_queue *bfq_get_queue(struct bfq_data *bfqd,
 
 	rcu_read_lock();
 
-	bfqg = bfq_find_set_group(bfqd, bio_blkcg(bio));
+	bfqg = bfq_find_set_group(bfqd, __bio_blkcg(bio));
 	if (!bfqg) {
 		bfqq = &bfqd->oom_bfqq;
 		goto out;
@@ -5330,7 +5417,7 @@ static int bfq_init_queue(struct request_queue *q, struct elevator_type *e)
 	bfqd->idle_slice_timer.function = bfq_idle_slice_timer;
 
 	bfqd->queue_weights_tree = RB_ROOT;
-	bfqd->group_weights_tree = RB_ROOT;
+	bfqd->num_active_groups = 0;
 
 	INIT_LIST_HEAD(&bfqd->active_list);
 	INIT_LIST_HEAD(&bfqd->idle_list);

block/bfq-iosched.h

@@ -108,15 +108,14 @@ struct bfq_sched_data {
 };
 
 /**
- * struct bfq_weight_counter - counter of the number of all active entities
+ * struct bfq_weight_counter - counter of the number of all active queues
  *                             with a given weight.
  */
 struct bfq_weight_counter {
-	unsigned int weight; /* weight of the entities this counter refers to */
-	unsigned int num_active; /* nr of active entities with this weight */
+	unsigned int weight; /* weight of the queues this counter refers to */
+	unsigned int num_active; /* nr of active queues with this weight */
 	/*
-	 * Weights tree member (see bfq_data's @queue_weights_tree and
-	 * @group_weights_tree)
+	 * Weights tree member (see bfq_data's @queue_weights_tree)
 	 */
 	struct rb_node weights_node;
 };
@@ -151,8 +150,6 @@ struct bfq_weight_counter {
 struct bfq_entity {
 	/* service_tree member */
 	struct rb_node rb_node;
-	/* pointer to the weight counter associated with this entity */
-	struct bfq_weight_counter *weight_counter;
 
 	/*
 	 * Flag, true if the entity is on a tree (either the active or
@@ -266,6 +263,9 @@ struct bfq_queue {
 	/* entity representing this queue in the scheduler */
 	struct bfq_entity entity;
 
+	/* pointer to the weight counter associated with this entity */
+	struct bfq_weight_counter *weight_counter;
+
 	/* maximum budget allowed from the feedback mechanism */
 	int max_budget;
 	/* budget expiration (in jiffies) */
@@ -351,6 +351,32 @@ struct bfq_queue {
 	unsigned long split_time; /* time of last split */
 
 	unsigned long first_IO_time; /* time of first I/O for this queue */
+
+	/* max service rate measured so far */
+	u32 max_service_rate;
+	/*
+	 * Ratio between the service received by bfqq while it is in
+	 * service, and the cumulative service (of requests of other
+	 * queues) that may be injected while bfqq is empty but still
+	 * in service. To increase precision, the coefficient is
+	 * measured in tenths of unit. Here are some example of (1)
+	 * ratios, (2) resulting percentages of service injected
+	 * w.r.t. to the total service dispatched while bfqq is in
+	 * service, and (3) corresponding values of the coefficient:
+	 * 1 (50%) -> 10
+	 * 2 (33%) -> 20
+	 * 10 (9%) -> 100
+	 * 9.9 (9%) -> 99
+	 * 1.5 (40%) -> 15
+	 * 0.5 (66%) -> 5
+	 * 0.1 (90%) -> 1
+	 *
+	 * So, if the coefficient is lower than 10, then
+	 * injected service is more than bfqq service.
+	 */
+	unsigned int inject_coeff;
+	/* amount of service injected in current service slot */
+	unsigned int injected_service;
 };
 
 /**
@@ -423,14 +449,9 @@ struct bfq_data {
 	 */
 	struct rb_root queue_weights_tree;
 	/*
-	 * rbtree of non-queue @bfq_entity weight counters, sorted by
-	 * weight. Used to keep track of whether all @bfq_groups have
-	 * the same weight. The tree contains one counter for each
-	 * distinct weight associated to some active @bfq_group (see
-	 * the comments to the functions bfq_weights_tree_[add|remove]
-	 * for further details).
+	 * number of groups with requests still waiting for completion
 	 */
-	struct rb_root group_weights_tree;
+	unsigned int num_active_groups;
 
 	/*
 	 * Number of bfq_queues containing requests (including the
@@ -825,10 +846,10 @@ struct bfq_queue *bic_to_bfqq(struct bfq_io_cq *bic, bool is_sync);
 void bic_set_bfqq(struct bfq_io_cq *bic, struct bfq_queue *bfqq, bool is_sync);
 struct bfq_data *bic_to_bfqd(struct bfq_io_cq *bic);
 void bfq_pos_tree_add_move(struct bfq_data *bfqd, struct bfq_queue *bfqq);
-void bfq_weights_tree_add(struct bfq_data *bfqd, struct bfq_entity *entity,
+void bfq_weights_tree_add(struct bfq_data *bfqd, struct bfq_queue *bfqq,
 			  struct rb_root *root);
 void __bfq_weights_tree_remove(struct bfq_data *bfqd,
-			       struct bfq_entity *entity,
+			       struct bfq_queue *bfqq,
 			       struct rb_root *root);
 void bfq_weights_tree_remove(struct bfq_data *bfqd,
 			     struct bfq_queue *bfqq);

block/bfq-wf2q.c

@@ -788,25 +788,29 @@ __bfq_entity_update_weight_prio(struct bfq_service_tree *old_st,
 		new_weight = entity->orig_weight *
 			     (bfqq ? bfqq->wr_coeff : 1);
 		/*
-		 * If the weight of the entity changes, remove the entity
-		 * from its old weight counter (if there is a counter
-		 * associated with the entity), and add it to the counter
-		 * associated with its new weight.
+		 * If the weight of the entity changes, and the entity is a
+		 * queue, remove the entity from its old weight counter (if
+		 * there is a counter associated with the entity).
 		 */
 		if (prev_weight != new_weight) {
-			root = bfqq ? &bfqd->queue_weights_tree :
-				      &bfqd->group_weights_tree;
-			__bfq_weights_tree_remove(bfqd, entity, root);
+			if (bfqq) {
+				root = &bfqd->queue_weights_tree;
+				__bfq_weights_tree_remove(bfqd, bfqq, root);
+			} else
+				bfqd->num_active_groups--;
 		}
 		entity->weight = new_weight;
 		/*
-		 * Add the entity to its weights tree only if it is
-		 * not associated with a weight-raised queue.
+		 * Add the entity, if it is not a weight-raised queue,
+		 * to the counter associated with its new weight.
 		 */
-		if (prev_weight != new_weight &&
-		    (bfqq ? bfqq->wr_coeff == 1 : 1))
-			/* If we get here, root has been initialized. */
-			bfq_weights_tree_add(bfqd, entity, root);
+		if (prev_weight != new_weight) {
+			if (bfqq && bfqq->wr_coeff == 1) {
+				/* If we get here, root has been initialized. */
+				bfq_weights_tree_add(bfqd, bfqq, root);
+			} else
+				bfqd->num_active_groups++;
+		}
 
 		new_st->wsum += entity->weight;
 
@@ -1012,9 +1016,9 @@ static void __bfq_activate_entity(struct bfq_entity *entity,
 	if (!bfq_entity_to_bfqq(entity)) { /* bfq_group */
 		struct bfq_group *bfqg =
 			container_of(entity, struct bfq_group, entity);
+		struct bfq_data *bfqd = bfqg->bfqd;
 
-		bfq_weights_tree_add(bfqg->bfqd, entity,
-				     &bfqd->group_weights_tree);
+		bfqd->num_active_groups++;
 	}
 #endif
 
@@ -1181,10 +1185,17 @@ bool __bfq_deactivate_entity(struct bfq_entity *entity, bool ins_into_idle_tree)
 	st = bfq_entity_service_tree(entity);
 	is_in_service = entity == sd->in_service_entity;
 
-	if (is_in_service) {
-		bfq_calc_finish(entity, entity->service);
+	bfq_calc_finish(entity, entity->service);
+
+	if (is_in_service)
 		sd->in_service_entity = NULL;
-	}
+	else
+		/*
+		 * Non in-service entity: nobody will take care of
+		 * resetting its service counter on expiration. Do it
+		 * now.
+		 */
+		entity->service = 0;
 
 	if (entity->tree == &st->active)
 		bfq_active_extract(st, entity);
@@ -1685,7 +1696,7 @@ void bfq_add_bfqq_busy(struct bfq_data *bfqd, struct bfq_queue *bfqq)
 
 	if (!bfqq->dispatched)
 		if (bfqq->wr_coeff == 1)
-			bfq_weights_tree_add(bfqd, &bfqq->entity,
+			bfq_weights_tree_add(bfqd, bfqq,
 					     &bfqd->queue_weights_tree);
 
 	if (bfqq->wr_coeff > 1)

block/bio-integrity.c

@@ -306,6 +306,8 @@ bool bio_integrity_prep(struct bio *bio)
 	if (bio_data_dir(bio) == WRITE) {
 		bio_integrity_process(bio, &bio->bi_iter,
 				      bi->profile->generate_fn);
+	} else {
+		bip->bio_iter = bio->bi_iter;
 	}
 	return true;
 
@@ -331,20 +333,14 @@ static void bio_integrity_verify_fn(struct work_struct *work)
 		container_of(work, struct bio_integrity_payload, bip_work);
 	struct bio *bio = bip->bip_bio;
 	struct blk_integrity *bi = blk_get_integrity(bio->bi_disk);
-	struct bvec_iter iter = bio->bi_iter;
 
 	/*
 	 * At the moment verify is called bio's iterator was advanced
 	 * during split and completion, we need to rewind iterator to
 	 * it's original position.
 	 */
-	if (bio_rewind_iter(bio, &iter, iter.bi_done)) {
-		bio->bi_status = bio_integrity_process(bio, &iter,
-						       bi->profile->verify_fn);
-	} else {
-		bio->bi_status = BLK_STS_IOERR;
-	}
-
+	bio->bi_status = bio_integrity_process(bio, &bip->bio_iter,
+						bi->profile->verify_fn);
 	bio_integrity_free(bio);
 	bio_endio(bio);
 }

block/bio.c

@@ -609,7 +609,9 @@ void __bio_clone_fast(struct bio *bio, struct bio *bio_src)
 	bio->bi_iter = bio_src->bi_iter;
 	bio->bi_io_vec = bio_src->bi_io_vec;
 
-	bio_clone_blkcg_association(bio, bio_src);
+	bio_clone_blkg_association(bio, bio_src);
+
+	blkcg_bio_issue_init(bio);
 }
 EXPORT_SYMBOL(__bio_clone_fast);
 
@@ -729,7 +731,7 @@ int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page
 	}
 
 	/* If we may be able to merge these biovecs, force a recount */
-	if (bio->bi_vcnt > 1 && (BIOVEC_PHYS_MERGEABLE(bvec-1, bvec)))
+	if (bio->bi_vcnt > 1 && biovec_phys_mergeable(q, bvec - 1, bvec))
 		bio_clear_flag(bio, BIO_SEG_VALID);
 
  done:
@@ -827,6 +829,8 @@ int bio_add_page(struct bio *bio, struct page *page,
 }
 EXPORT_SYMBOL(bio_add_page);
 
+#define PAGE_PTRS_PER_BVEC     (sizeof(struct bio_vec) / sizeof(struct page *))
+
 /**
  * __bio_iov_iter_get_pages - pin user or kernel pages and add them to a bio
  * @bio: bio to add pages to
@@ -839,38 +843,35 @@ EXPORT_SYMBOL(bio_add_page);
  */
 static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
 {
-	unsigned short nr_pages = bio->bi_max_vecs - bio->bi_vcnt, idx;
+	unsigned short nr_pages = bio->bi_max_vecs - bio->bi_vcnt;
+	unsigned short entries_left = bio->bi_max_vecs - bio->bi_vcnt;
 	struct bio_vec *bv = bio->bi_io_vec + bio->bi_vcnt;
 	struct page **pages = (struct page **)bv;
+	ssize_t size, left;
+	unsigned len, i;
 	size_t offset;
-	ssize_t size;
+
+	/*
+	 * Move page array up in the allocated memory for the bio vecs as far as
+	 * possible so that we can start filling biovecs from the beginning
+	 * without overwriting the temporary page array.
+	*/
+	BUILD_BUG_ON(PAGE_PTRS_PER_BVEC < 2);
+	pages += entries_left * (PAGE_PTRS_PER_BVEC - 1);
 
 	size = iov_iter_get_pages(iter, pages, LONG_MAX, nr_pages, &offset);
 	if (unlikely(size <= 0))
 		return size ? size : -EFAULT;
-	idx = nr_pages = (size + offset + PAGE_SIZE - 1) / PAGE_SIZE;
 
-	/*
-	 * Deep magic below:  We need to walk the pinned pages backwards
-	 * because we are abusing the space allocated for the bio_vecs
-	 * for the page array.  Because the bio_vecs are larger than the
-	 * page pointers by definition this will always work.  But it also
-	 * means we can't use bio_add_page, so any changes to it's semantics
-	 * need to be reflected here as well.
-	 */
-	bio->bi_iter.bi_size += size;
-	bio->bi_vcnt += nr_pages;
+	for (left = size, i = 0; left > 0; left -= len, i++) {
+		struct page *page = pages[i];
 
-	while (idx--) {
-		bv[idx].bv_page = pages[idx];
-		bv[idx].bv_len = PAGE_SIZE;
-		bv[idx].bv_offset = 0;
+		len = min_t(size_t, PAGE_SIZE - offset, left);
+		if (WARN_ON_ONCE(bio_add_page(bio, page, len, offset) != len))
+			return -EINVAL;
+		offset = 0;
 	}
 
-	bv[0].bv_offset += offset;
-	bv[0].bv_len -= offset;
-	bv[nr_pages - 1].bv_len -= nr_pages * PAGE_SIZE - offset - size;
-
 	iov_iter_advance(iter, size);
 	return 0;
 }
@@ -1807,7 +1808,6 @@ struct bio *bio_split(struct bio *bio, int sectors,
 		bio_integrity_trim(split);
 
 	bio_advance(bio, split->bi_iter.bi_size);
-	bio->bi_iter.bi_done = 0;
 
 	if (bio_flagged(bio, BIO_TRACE_COMPLETION))
 		bio_set_flag(split, BIO_TRACE_COMPLETION);
@@ -1956,69 +1956,151 @@ EXPORT_SYMBOL(bioset_init_from_src);
 
 #ifdef CONFIG_BLK_CGROUP
 
+/**
+ * bio_associate_blkg - associate a bio with the a blkg
+ * @bio: target bio
+ * @blkg: the blkg to associate
+ *
+ * This tries to associate @bio with the specified blkg.  Association failure
+ * is handled by walking up the blkg tree.  Therefore, the blkg associated can
+ * be anything between @blkg and the root_blkg.  This situation only happens
+ * when a cgroup is dying and then the remaining bios will spill to the closest
+ * alive blkg.
+ *
+ * A reference will be taken on the @blkg and will be released when @bio is
+ * freed.
+ */
+int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg)
+{
+	if (unlikely(bio->bi_blkg))
+		return -EBUSY;
+	bio->bi_blkg = blkg_tryget_closest(blkg);
+	return 0;
+}
+
+/**
+ * __bio_associate_blkg_from_css - internal blkg association function
+ *
+ * This in the core association function that all association paths rely on.
+ * A blkg reference is taken which is released upon freeing of the bio.
+ */
+static int __bio_associate_blkg_from_css(struct bio *bio,
+					 struct cgroup_subsys_state *css)
+{
+	struct request_queue *q = bio->bi_disk->queue;
+	struct blkcg_gq *blkg;
+	int ret;
+
+	rcu_read_lock();
+
+	if (!css || !css->parent)
+		blkg = q->root_blkg;
+	else
+		blkg = blkg_lookup_create(css_to_blkcg(css), q);
+
+	ret = bio_associate_blkg(bio, blkg);
+
+	rcu_read_unlock();
+	return ret;
+}
+
+/**
+ * bio_associate_blkg_from_css - associate a bio with a specified css
+ * @bio: target bio
+ * @css: target css
+ *
+ * Associate @bio with the blkg found by combining the css's blkg and the
+ * request_queue of the @bio.  This falls back to the queue's root_blkg if
+ * the association fails with the css.
+ */
+int bio_associate_blkg_from_css(struct bio *bio,
+				struct cgroup_subsys_state *css)
+{
+	if (unlikely(bio->bi_blkg))
+		return -EBUSY;
+	return __bio_associate_blkg_from_css(bio, css);
+}
+EXPORT_SYMBOL_GPL(bio_associate_blkg_from_css);
+
 #ifdef CONFIG_MEMCG
 /**
- * bio_associate_blkcg_from_page - associate a bio with the page's blkcg
+ * bio_associate_blkg_from_page - associate a bio with the page's blkg
  * @bio: target bio
  * @page: the page to lookup the blkcg from
  *
- * Associate @bio with the blkcg from @page's owning memcg.  This works like
- * every other associate function wrt references.
+ * Associate @bio with the blkg from @page's owning memcg and the respective
+ * request_queue.  If cgroup_e_css returns NULL, fall back to the queue's
+ * root_blkg.
+ *
+ * Note: this must be called after bio has an associated device.
  */
-int bio_associate_blkcg_from_page(struct bio *bio, struct page *page)
+int bio_associate_blkg_from_page(struct bio *bio, struct page *page)
 {
-	struct cgroup_subsys_state *blkcg_css;
+	struct cgroup_subsys_state *css;
+	int ret;
 
-	if (unlikely(bio->bi_css))
+	if (unlikely(bio->bi_blkg))
 		return -EBUSY;
 	if (!page->mem_cgroup)
 		return 0;
-	blkcg_css = cgroup_get_e_css(page->mem_cgroup->css.cgroup,
-				     &io_cgrp_subsys);
-	bio->bi_css = blkcg_css;
-	return 0;
+
+	rcu_read_lock();
+
+	css = cgroup_e_css(page->mem_cgroup->css.cgroup, &io_cgrp_subsys);
+
+	ret = __bio_associate_blkg_from_css(bio, css);
+
+	rcu_read_unlock();
+	return ret;
 }
 #endif /* CONFIG_MEMCG */
 
 /**
- * bio_associate_blkcg - associate a bio with the specified blkcg
+ * bio_associate_create_blkg - associate a bio with a blkg from q
+ * @q: request_queue where bio is going
  * @bio: target bio
- * @blkcg_css: css of the blkcg to associate
- *
- * Associate @bio with the blkcg specified by @blkcg_css.  Block layer will
- * treat @bio as if it were issued by a task which belongs to the blkcg.
  *
- * This function takes an extra reference of @blkcg_css which will be put
- * when @bio is released.  The caller must own @bio and is responsible for
- * synchronizing calls to this function.
+ * Associate @bio with the blkg found from the bio's css and the request_queue.
+ * If one is not found, bio_lookup_blkg creates the blkg.  This falls back to
+ * the queue's root_blkg if association fails.
  */
-int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css)
+int bio_associate_create_blkg(struct request_queue *q, struct bio *bio)
 {
-	if (unlikely(bio->bi_css))
-		return -EBUSY;
-	css_get(blkcg_css);
-	bio->bi_css = blkcg_css;
-	return 0;
+	struct cgroup_subsys_state *css;
+	int ret = 0;
+
+	/* someone has already associated this bio with a blkg */
+	if (bio->bi_blkg)
+		return ret;
+
+	rcu_read_lock();
+
+	css = blkcg_css();
+
+	ret = __bio_associate_blkg_from_css(bio, css);
+
+	rcu_read_unlock();
+	return ret;
 }
-EXPORT_SYMBOL_GPL(bio_associate_blkcg);
 
 /**
- * bio_associate_blkg - associate a bio with the specified blkg
+ * bio_reassociate_blkg - reassociate a bio with a blkg from q
+ * @q: request_queue where bio is going
  * @bio: target bio
- * @blkg: the blkg to associate
  *
- * Associate @bio with the blkg specified by @blkg.  This is the queue specific
- * blkcg information associated with the @bio, a reference will be taken on the
- * @blkg and will be freed when the bio is freed.
+ * When submitting a bio, multiple recursive calls to make_request() may occur.
+ * This causes the initial associate done in blkcg_bio_issue_check() to be
+ * incorrect and reference the prior request_queue.  This performs reassociation
+ * when this situation happens.
  */
-int bio_associate_blkg(struct bio *bio, struct blkcg_gq *blkg)
+int bio_reassociate_blkg(struct request_queue *q, struct bio *bio)
 {
-	if (unlikely(bio->bi_blkg))
-		return -EBUSY;
-	if (!blkg_try_get(blkg))
-		return -ENODEV;
-	bio->bi_blkg = blkg;
-	return 0;
+	if (bio->bi_blkg) {
+		blkg_put(bio->bi_blkg);
+		bio->bi_blkg = NULL;
+	}
+
+	return bio_associate_create_blkg(q, bio);
 }
 
 /**
@@ -2031,10 +2113,6 @@ void bio_disassociate_task(struct bio *bio)
 		put_io_context(bio->bi_ioc);
 		bio->bi_ioc = NULL;
 	}
-	if (bio->bi_css) {
-		css_put(bio->bi_css);
-		bio->bi_css = NULL;
-	}
 	if (bio->bi_blkg) {
 		blkg_put(bio->bi_blkg);
 		bio->bi_blkg = NULL;
@@ -2042,16 +2120,16 @@ void bio_disassociate_task(struct bio *bio)
 }
 
 /**
- * bio_clone_blkcg_association - clone blkcg association from src to dst bio
+ * bio_clone_blkg_association - clone blkg association from src to dst bio
  * @dst: destination bio
  * @src: source bio
  */
-void bio_clone_blkcg_association(struct bio *dst, struct bio *src)
+void bio_clone_blkg_association(struct bio *dst, struct bio *src)
 {
-	if (src->bi_css)
-		WARN_ON(bio_associate_blkcg(dst, src->bi_css));
+	if (src->bi_blkg)
+		bio_associate_blkg(dst, src->bi_blkg);
 }
-EXPORT_SYMBOL_GPL(bio_clone_blkcg_association);
+EXPORT_SYMBOL_GPL(bio_clone_blkg_association);
 #endif /* CONFIG_BLK_CGROUP */
 
 static void __init biovec_init_slabs(void)

block/blk-cgroup.c

@@ -84,6 +84,37 @@ static void blkg_free(struct blkcg_gq *blkg)
 	kfree(blkg);
 }
 
+static void __blkg_release(struct rcu_head *rcu)
+{
+	struct blkcg_gq *blkg = container_of(rcu, struct blkcg_gq, rcu_head);
+
+	percpu_ref_exit(&blkg->refcnt);
+
+	/* release the blkcg and parent blkg refs this blkg has been holding */
+	css_put(&blkg->blkcg->css);
+	if (blkg->parent)
+		blkg_put(blkg->parent);
+
+	wb_congested_put(blkg->wb_congested);
+
+	blkg_free(blkg);
+}
+
+/*
+ * A group is RCU protected, but having an rcu lock does not mean that one
+ * can access all the fields of blkg and assume these are valid.  For
+ * example, don't try to follow throtl_data and request queue links.
+ *
+ * Having a reference to blkg under an rcu allows accesses to only values
+ * local to groups like group stats and group rate limits.
+ */
+static void blkg_release(struct percpu_ref *ref)
+{
+	struct blkcg_gq *blkg = container_of(ref, struct blkcg_gq, refcnt);
+
+	call_rcu(&blkg->rcu_head, __blkg_release);
+}
+
 /**
  * blkg_alloc - allocate a blkg
  * @blkcg: block cgroup the new blkg is associated with
@@ -110,7 +141,6 @@ static struct blkcg_gq *blkg_alloc(struct blkcg *blkcg, struct request_queue *q,
 	blkg->q = q;
 	INIT_LIST_HEAD(&blkg->q_node);
 	blkg->blkcg = blkcg;
-	atomic_set(&blkg->refcnt, 1);
 
 	/* root blkg uses @q->root_rl, init rl only for !root blkgs */
 	if (blkcg != &blkcg_root) {
@@ -217,6 +247,11 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg,
 		blkg_get(blkg->parent);
 	}
 
+	ret = percpu_ref_init(&blkg->refcnt, blkg_release, 0,
+			      GFP_NOWAIT | __GFP_NOWARN);
+	if (ret)
+		goto err_cancel_ref;
+
 	/* invoke per-policy init */
 	for (i = 0; i < BLKCG_MAX_POLS; i++) {
 		struct blkcg_policy *pol = blkcg_policy[i];
@@ -249,6 +284,8 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg,
 	blkg_put(blkg);
 	return ERR_PTR(ret);
 
+err_cancel_ref:
+	percpu_ref_exit(&blkg->refcnt);
 err_put_congested:
 	wb_congested_put(wb_congested);
 err_put_css:
@@ -259,7 +296,7 @@ err_free_blkg:
 }
 
 /**
- * blkg_lookup_create - lookup blkg, try to create one if not there
+ * __blkg_lookup_create - lookup blkg, try to create one if not there
  * @blkcg: blkcg of interest
  * @q: request_queue of interest
  *
@@ -268,12 +305,11 @@ err_free_blkg:
  * that all non-root blkg's have access to the parent blkg.  This function
  * should be called under RCU read lock and @q->queue_lock.
  *
- * Returns pointer to the looked up or created blkg on success, ERR_PTR()
- * value on error.  If @q is dead, returns ERR_PTR(-EINVAL).  If @q is not
- * dead and bypassing, returns ERR_PTR(-EBUSY).
+ * Returns the blkg or the closest blkg if blkg_create fails as it walks
+ * down from root.
  */
-struct blkcg_gq *blkg_lookup_create(struct blkcg *blkcg,
-				    struct request_queue *q)
+struct blkcg_gq *__blkg_lookup_create(struct blkcg *blkcg,
+				      struct request_queue *q)
 {
 	struct blkcg_gq *blkg;
 
@@ -285,7 +321,7 @@ struct blkcg_gq *blkg_lookup_create(struct blkcg *blkcg,
 	 * we shouldn't allow anything to go through for a bypassing queue.
 	 */
 	if (unlikely(blk_queue_bypass(q)))
-		return ERR_PTR(blk_queue_dying(q) ? -ENODEV : -EBUSY);
+		return q->root_blkg;
 
 	blkg = __blkg_lookup(blkcg, q, true);
 	if (blkg)
@@ -293,23 +329,58 @@ struct blkcg_gq *blkg_lookup_create(struct blkcg *blkcg,
 
 	/*
 	 * Create blkgs walking down from blkcg_root to @blkcg, so that all
-	 * non-root blkgs have access to their parents.
+	 * non-root blkgs have access to their parents.  Returns the closest
+	 * blkg to the intended blkg should blkg_create() fail.
 	 */
 	while (true) {
 		struct blkcg *pos = blkcg;
 		struct blkcg *parent = blkcg_parent(blkcg);
-
-		while (parent && !__blkg_lookup(parent, q, false)) {
+		struct blkcg_gq *ret_blkg = q->root_blkg;
+
+		while (parent) {
+			blkg = __blkg_lookup(parent, q, false);
+			if (blkg) {
+				/* remember closest blkg */
+				ret_blkg = blkg;
+				break;
+			}
 			pos = parent;
 			parent = blkcg_parent(parent);
 		}
 
 		blkg = blkg_create(pos, q, NULL);
-		if (pos == blkcg || IS_ERR(blkg))
+		if (IS_ERR(blkg))
+			return ret_blkg;
+		if (pos == blkcg)
 			return blkg;
 	}
 }
 
+/**
+ * blkg_lookup_create - find or create a blkg
+ * @blkcg: target block cgroup
+ * @q: target request_queue
+ *
+ * This looks up or creates the blkg representing the unique pair
+ * of the blkcg and the request_queue.
+ */
+struct blkcg_gq *blkg_lookup_create(struct blkcg *blkcg,
+				    struct request_queue *q)
+{
+	struct blkcg_gq *blkg = blkg_lookup(blkcg, q);
+	unsigned long flags;
+
+	if (unlikely(!blkg)) {
+		spin_lock_irqsave(q->queue_lock, flags);
+
+		blkg = __blkg_lookup_create(blkcg, q);
+
+		spin_unlock_irqrestore(q->queue_lock, flags);
+	}
+
+	return blkg;
+}
+
 static void blkg_destroy(struct blkcg_gq *blkg)
 {
 	struct blkcg *blkcg = blkg->blkcg;
@@ -353,7 +424,7 @@ static void blkg_destroy(struct blkcg_gq *blkg)
 	 * Put the reference taken at the time of creation so that when all
 	 * queues are gone, group can be destroyed.
 	 */
-	blkg_put(blkg);
+	percpu_ref_kill(&blkg->refcnt);
 }
 
 /**
@@ -380,29 +451,6 @@ static void blkg_destroy_all(struct request_queue *q)
 	q->root_rl.blkg = NULL;
 }
 
-/*
- * A group is RCU protected, but having an rcu lock does not mean that one
- * can access all the fields of blkg and assume these are valid.  For
- * example, don't try to follow throtl_data and request queue links.
- *
- * Having a reference to blkg under an rcu allows accesses to only values
- * local to groups like group stats and group rate limits.
- */
-void __blkg_release_rcu(struct rcu_head *rcu_head)
-{
-	struct blkcg_gq *blkg = container_of(rcu_head, struct blkcg_gq, rcu_head);
-
-	/* release the blkcg and parent blkg refs this blkg has been holding */
-	css_put(&blkg->blkcg->css);
-	if (blkg->parent)
-		blkg_put(blkg->parent);
-
-	wb_congested_put(blkg->wb_congested);
-
-	blkg_free(blkg);
-}
-EXPORT_SYMBOL_GPL(__blkg_release_rcu);
-
 /*
  * The next function used by blk_queue_for_each_rl().  It's a bit tricky
  * because the root blkg uses @q->root_rl instead of its own rl.
@@ -1748,8 +1796,7 @@ void blkcg_maybe_throttle_current(void)
 	blkg = blkg_lookup(blkcg, q);
 	if (!blkg)
 		goto out;
-	blkg = blkg_try_get(blkg);
-	if (!blkg)
+	if (!blkg_tryget(blkg))
 		goto out;
 	rcu_read_unlock();
 

block/blk-core.c

@@ -42,6 +42,7 @@
 #include "blk.h"
 #include "blk-mq.h"
 #include "blk-mq-sched.h"
+#include "blk-pm.h"
 #include "blk-rq-qos.h"
 
 #ifdef CONFIG_DEBUG_FS
@@ -421,24 +422,25 @@ void blk_sync_queue(struct request_queue *q)
 EXPORT_SYMBOL(blk_sync_queue);
 
 /**
- * blk_set_preempt_only - set QUEUE_FLAG_PREEMPT_ONLY
+ * blk_set_pm_only - increment pm_only counter
  * @q: request queue pointer
- *
- * Returns the previous value of the PREEMPT_ONLY flag - 0 if the flag was not
- * set and 1 if the flag was already set.
  */
-int blk_set_preempt_only(struct request_queue *q)
+void blk_set_pm_only(struct request_queue *q)
 {
-	return blk_queue_flag_test_and_set(QUEUE_FLAG_PREEMPT_ONLY, q);
+	atomic_inc(&q->pm_only);
 }
-EXPORT_SYMBOL_GPL(blk_set_preempt_only);
+EXPORT_SYMBOL_GPL(blk_set_pm_only);
 
-void blk_clear_preempt_only(struct request_queue *q)
+void blk_clear_pm_only(struct request_queue *q)
 {
-	blk_queue_flag_clear(QUEUE_FLAG_PREEMPT_ONLY, q);
-	wake_up_all(&q->mq_freeze_wq);
+	int pm_only;
+
+	pm_only = atomic_dec_return(&q->pm_only);
+	WARN_ON_ONCE(pm_only < 0);
+	if (pm_only == 0)
+		wake_up_all(&q->mq_freeze_wq);
 }
-EXPORT_SYMBOL_GPL(blk_clear_preempt_only);
+EXPORT_SYMBOL_GPL(blk_clear_pm_only);
 
 /**
  * __blk_run_queue_uncond - run a queue whether or not it has been stopped
@@ -917,7 +919,7 @@ EXPORT_SYMBOL(blk_alloc_queue);
  */
 int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags)
 {
-	const bool preempt = flags & BLK_MQ_REQ_PREEMPT;
+	const bool pm = flags & BLK_MQ_REQ_PREEMPT;
 
 	while (true) {
 		bool success = false;
@@ -925,11 +927,11 @@ int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags)
 		rcu_read_lock();
 		if (percpu_ref_tryget_live(&q->q_usage_counter)) {
 			/*
-			 * The code that sets the PREEMPT_ONLY flag is
-			 * responsible for ensuring that that flag is globally
-			 * visible before the queue is unfrozen.
+			 * The code that increments the pm_only counter is
+			 * responsible for ensuring that that counter is
+			 * globally visible before the queue is unfrozen.
 			 */
-			if (preempt || !blk_queue_preempt_only(q)) {
+			if (pm || !blk_queue_pm_only(q)) {
 				success = true;
 			} else {
 				percpu_ref_put(&q->q_usage_counter);
@@ -954,7 +956,8 @@ int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags)
 
 		wait_event(q->mq_freeze_wq,
 			   (atomic_read(&q->mq_freeze_depth) == 0 &&
-			    (preempt || !blk_queue_preempt_only(q))) ||
+			    (pm || (blk_pm_request_resume(q),
+				    !blk_queue_pm_only(q)))) ||
 			   blk_queue_dying(q));
 		if (blk_queue_dying(q))
 			return -ENODEV;
@@ -1051,8 +1054,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id,
 	mutex_init(&q->sysfs_lock);
 	spin_lock_init(&q->__queue_lock);
 
-	if (!q->mq_ops)
-		q->queue_lock = lock ? : &q->__queue_lock;
+	q->queue_lock = lock ? : &q->__queue_lock;
 
 	/*
 	 * A queue starts its life with bypass turned on to avoid
@@ -1160,7 +1162,7 @@ int blk_init_allocated_queue(struct request_queue *q)
 {
 	WARN_ON_ONCE(q->mq_ops);
 
-	q->fq = blk_alloc_flush_queue(q, NUMA_NO_NODE, q->cmd_size);
+	q->fq = blk_alloc_flush_queue(q, NUMA_NO_NODE, q->cmd_size, GFP_KERNEL);
 	if (!q->fq)
 		return -ENOMEM;
 
@@ -1726,16 +1728,6 @@ void part_round_stats(struct request_queue *q, int cpu, struct hd_struct *part)
 }
 EXPORT_SYMBOL_GPL(part_round_stats);
 
-#ifdef CONFIG_PM
-static void blk_pm_put_request(struct request *rq)
-{
-	if (rq->q->dev && !(rq->rq_flags & RQF_PM) && !--rq->q->nr_pending)
-		pm_runtime_mark_last_busy(rq->q->dev);
-}
-#else
-static inline void blk_pm_put_request(struct request *rq) {}
-#endif
-
 void __blk_put_request(struct request_queue *q, struct request *req)
 {
 	req_flags_t rq_flags = req->rq_flags;
@@ -1752,6 +1744,7 @@ void __blk_put_request(struct request_queue *q, struct request *req)
 
 	blk_req_zone_write_unlock(req);
 	blk_pm_put_request(req);
+	blk_pm_mark_last_busy(req);
 
 	elv_completed_request(q, req);
 
@@ -2440,6 +2433,7 @@ blk_qc_t generic_make_request(struct bio *bio)
 			if (q)
 				blk_queue_exit(q);
 			q = bio->bi_disk->queue;
+			bio_reassociate_blkg(q, bio);
 			flags = 0;
 			if (bio->bi_opf & REQ_NOWAIT)
 				flags = BLK_MQ_REQ_NOWAIT;
@@ -2750,30 +2744,6 @@ void blk_account_io_done(struct request *req, u64 now)
 	}
 }
 
-#ifdef CONFIG_PM
-/*
- * Don't process normal requests when queue is suspended
- * or in the process of suspending/resuming
- */
-static bool blk_pm_allow_request(struct request *rq)
-{
-	switch (rq->q->rpm_status) {
-	case RPM_RESUMING:
-	case RPM_SUSPENDING:
-		return rq->rq_flags & RQF_PM;
-	case RPM_SUSPENDED:
-		return false;
-	default:
-		return true;
-	}
-}
-#else
-static bool blk_pm_allow_request(struct request *rq)
-{
-	return true;
-}
-#endif
-
 void blk_account_io_start(struct request *rq, bool new_io)
 {
 	struct hd_struct *part;
@@ -2819,11 +2789,14 @@ static struct request *elv_next_request(struct request_queue *q)
 
 	while (1) {
 		list_for_each_entry(rq, &q->queue_head, queuelist) {
-			if (blk_pm_allow_request(rq))
-				return rq;
-
-			if (rq->rq_flags & RQF_SOFTBARRIER)
-				break;
+#ifdef CONFIG_PM
+			/*
+			 * If a request gets queued in state RPM_SUSPENDED
+			 * then that's a kernel bug.
+			 */
+			WARN_ON_ONCE(q->rpm_status == RPM_SUSPENDED);
+#endif
+			return rq;
 		}
 
 		/*
@@ -3755,191 +3728,6 @@ void blk_finish_plug(struct blk_plug *plug)
 }
 EXPORT_SYMBOL(blk_finish_plug);
 
-#ifdef CONFIG_PM
-/**
- * blk_pm_runtime_init - Block layer runtime PM initialization routine
- * @q: the queue of the device
- * @dev: the device the queue belongs to
- *
- * Description:
- *    Initialize runtime-PM-related fields for @q and start auto suspend for
- *    @dev. Drivers that want to take advantage of request-based runtime PM
- *    should call this function after @dev has been initialized, and its
- *    request queue @q has been allocated, and runtime PM for it can not happen
- *    yet(either due to disabled/forbidden or its usage_count > 0). In most
- *    cases, driver should call this function before any I/O has taken place.
- *
- *    This function takes care of setting up using auto suspend for the device,
- *    the autosuspend delay is set to -1 to make runtime suspend impossible
- *    until an updated value is either set by user or by driver. Drivers do
- *    not need to touch other autosuspend settings.
- *
- *    The block layer runtime PM is request based, so only works for drivers
- *    that use request as their IO unit instead of those directly use bio's.
- */
-void blk_pm_runtime_init(struct request_queue *q, struct device *dev)
-{
-	/* Don't enable runtime PM for blk-mq until it is ready */
-	if (q->mq_ops) {
-		pm_runtime_disable(dev);
-		return;
-	}
-
-	q->dev = dev;
-	q->rpm_status = RPM_ACTIVE;
-	pm_runtime_set_autosuspend_delay(q->dev, -1);
-	pm_runtime_use_autosuspend(q->dev);
-}
-EXPORT_SYMBOL(blk_pm_runtime_init);
-
-/**
- * blk_pre_runtime_suspend - Pre runtime suspend check
- * @q: the queue of the device
- *
- * Description:
- *    This function will check if runtime suspend is allowed for the device
- *    by examining if there are any requests pending in the queue. If there
- *    are requests pending, the device can not be runtime suspended; otherwise,
- *    the queue's status will be updated to SUSPENDING and the driver can
- *    proceed to suspend the device.
- *
- *    For the not allowed case, we mark last busy for the device so that
- *    runtime PM core will try to autosuspend it some time later.
- *
- *    This function should be called near the start of the device's
- *    runtime_suspend callback.
- *
- * Return:
- *    0		- OK to runtime suspend the device
- *    -EBUSY	- Device should not be runtime suspended
- */
-int blk_pre_runtime_suspend(struct request_queue *q)
-{
-	int ret = 0;
-
-	if (!q->dev)
-		return ret;
-
-	spin_lock_irq(q->queue_lock);
-	if (q->nr_pending) {
-		ret = -EBUSY;
-		pm_runtime_mark_last_busy(q->dev);
-	} else {
-		q->rpm_status = RPM_SUSPENDING;
-	}
-	spin_unlock_irq(q->queue_lock);
-	return ret;
-}
-EXPORT_SYMBOL(blk_pre_runtime_suspend);
-
-/**
- * blk_post_runtime_suspend - Post runtime suspend processing
- * @q: the queue of the device
- * @err: return value of the device's runtime_suspend function
- *
- * Description:
- *    Update the queue's runtime status according to the return value of the
- *    device's runtime suspend function and mark last busy for the device so
- *    that PM core will try to auto suspend the device at a later time.
- *
- *    This function should be called near the end of the device's
- *    runtime_suspend callback.
- */
-void blk_post_runtime_suspend(struct request_queue *q, int err)
-{
-	if (!q->dev)
-		return;
-
-	spin_lock_irq(q->queue_lock);
-	if (!err) {
-		q->rpm_status = RPM_SUSPENDED;
-	} else {
-		q->rpm_status = RPM_ACTIVE;
-		pm_runtime_mark_last_busy(q->dev);
-	}
-	spin_unlock_irq(q->queue_lock);
-}
-EXPORT_SYMBOL(blk_post_runtime_suspend);
-
-/**
- * blk_pre_runtime_resume - Pre runtime resume processing
- * @q: the queue of the device
- *
- * Description:
- *    Update the queue's runtime status to RESUMING in preparation for the
- *    runtime resume of the device.
- *
- *    This function should be called near the start of the device's
- *    runtime_resume callback.
- */
-void blk_pre_runtime_resume(struct request_queue *q)
-{
-	if (!q->dev)
-		return;
-
-	spin_lock_irq(q->queue_lock);
-	q->rpm_status = RPM_RESUMING;
-	spin_unlock_irq(q->queue_lock);
-}
-EXPORT_SYMBOL(blk_pre_runtime_resume);
-
-/**
- * blk_post_runtime_resume - Post runtime resume processing
- * @q: the queue of the device
- * @err: return value of the device's runtime_resume function
- *
- * Description:
- *    Update the queue's runtime status according to the return value of the
- *    device's runtime_resume function. If it is successfully resumed, process
- *    the requests that are queued into the device's queue when it is resuming
- *    and then mark last busy and initiate autosuspend for it.
- *
- *    This function should be called near the end of the device's
- *    runtime_resume callback.
- */
-void blk_post_runtime_resume(struct request_queue *q, int err)
-{
-	if (!q->dev)
-		return;
-
-	spin_lock_irq(q->queue_lock);
-	if (!err) {
-		q->rpm_status = RPM_ACTIVE;
-		__blk_run_queue(q);
-		pm_runtime_mark_last_busy(q->dev);
-		pm_request_autosuspend(q->dev);
-	} else {
-		q->rpm_status = RPM_SUSPENDED;
-	}
-	spin_unlock_irq(q->queue_lock);
-}
-EXPORT_SYMBOL(blk_post_runtime_resume);
-
-/**
- * blk_set_runtime_active - Force runtime status of the queue to be active
- * @q: the queue of the device
- *
- * If the device is left runtime suspended during system suspend the resume
- * hook typically resumes the device and corrects runtime status
- * accordingly. However, that does not affect the queue runtime PM status
- * which is still "suspended". This prevents processing requests from the
- * queue.
- *
- * This function can be used in driver's resume hook to correct queue
- * runtime PM status and re-enable peeking requests from the queue. It
- * should be called before first request is added to the queue.
- */
-void blk_set_runtime_active(struct request_queue *q)
-{
-	spin_lock_irq(q->queue_lock);
-	q->rpm_status = RPM_ACTIVE;
-	pm_runtime_mark_last_busy(q->dev);
-	pm_request_autosuspend(q->dev);
-	spin_unlock_irq(q->queue_lock);
-}
-EXPORT_SYMBOL(blk_set_runtime_active);
-#endif
-
 int __init blk_dev_init(void)
 {
 	BUILD_BUG_ON(REQ_OP_LAST >= (1 << REQ_OP_BITS));

block/blk-flush.c

@@ -566,12 +566,12 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
 EXPORT_SYMBOL(blkdev_issue_flush);
 
 struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
-		int node, int cmd_size)
+		int node, int cmd_size, gfp_t flags)
 {
 	struct blk_flush_queue *fq;
 	int rq_sz = sizeof(struct request);
 
-	fq = kzalloc_node(sizeof(*fq), GFP_KERNEL, node);
+	fq = kzalloc_node(sizeof(*fq), flags, node);
 	if (!fq)
 		goto fail;
 
@@ -579,7 +579,7 @@ struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
 		spin_lock_init(&fq->mq_flush_lock);
 
 	rq_sz = round_up(rq_sz + cmd_size, cache_line_size());
-	fq->flush_rq = kzalloc_node(rq_sz, GFP_KERNEL, node);
+	fq->flush_rq = kzalloc_node(rq_sz, flags, node);
 	if (!fq->flush_rq)
 		goto fail_rq;
 

block/blk-integrity.c

@@ -49,12 +49,8 @@ int blk_rq_count_integrity_sg(struct request_queue *q, struct bio *bio)
 	bio_for_each_integrity_vec(iv, bio, iter) {
 
 		if (prev) {
-			if (!BIOVEC_PHYS_MERGEABLE(&ivprv, &iv))
+			if (!biovec_phys_mergeable(q, &ivprv, &iv))
 				goto new_segment;
-
-			if (!BIOVEC_SEG_BOUNDARY(q, &ivprv, &iv))
-				goto new_segment;
-
 			if (seg_size + iv.bv_len > queue_max_segment_size(q))
 				goto new_segment;
 
@@ -95,12 +91,8 @@ int blk_rq_map_integrity_sg(struct request_queue *q, struct bio *bio,
 	bio_for_each_integrity_vec(iv, bio, iter) {
 
 		if (prev) {
-			if (!BIOVEC_PHYS_MERGEABLE(&ivprv, &iv))
+			if (!biovec_phys_mergeable(q, &ivprv, &iv))
 				goto new_segment;
-
-			if (!BIOVEC_SEG_BOUNDARY(q, &ivprv, &iv))
-				goto new_segment;
-
 			if (sg->length + iv.bv_len > queue_max_segment_size(q))
 				goto new_segment;
 

block/blk-iolatency.c

@@ -115,9 +115,22 @@ struct child_latency_info {
 	atomic_t scale_cookie;
 };
 
+struct percentile_stats {
+	u64 total;
+	u64 missed;
+};
+
+struct latency_stat {
+	union {
+		struct percentile_stats ps;
+		struct blk_rq_stat rqs;
+	};
+};
+
 struct iolatency_grp {
 	struct blkg_policy_data pd;
-	struct blk_rq_stat __percpu *stats;
+	struct latency_stat __percpu *stats;
+	struct latency_stat cur_stat;
 	struct blk_iolatency *blkiolat;
 	struct rq_depth rq_depth;
 	struct rq_wait rq_wait;
@@ -132,6 +145,7 @@ struct iolatency_grp {
 	/* Our current number of IO's for the last summation. */
 	u64 nr_samples;
 
+	bool ssd;
 	struct child_latency_info child_lat;
 };
 
@@ -172,6 +186,80 @@ static inline struct blkcg_gq *lat_to_blkg(struct iolatency_grp *iolat)
 	return pd_to_blkg(&iolat->pd);
 }
 
+static inline void latency_stat_init(struct iolatency_grp *iolat,
+				     struct latency_stat *stat)
+{
+	if (iolat->ssd) {
+		stat->ps.total = 0;
+		stat->ps.missed = 0;
+	} else
+		blk_rq_stat_init(&stat->rqs);
+}
+
+static inline void latency_stat_sum(struct iolatency_grp *iolat,
+				    struct latency_stat *sum,
+				    struct latency_stat *stat)
+{
+	if (iolat->ssd) {
+		sum->ps.total += stat->ps.total;
+		sum->ps.missed += stat->ps.missed;
+	} else
+		blk_rq_stat_sum(&sum->rqs, &stat->rqs);
+}
+
+static inline void latency_stat_record_time(struct iolatency_grp *iolat,
+					    u64 req_time)
+{
+	struct latency_stat *stat = get_cpu_ptr(iolat->stats);
+	if (iolat->ssd) {
+		if (req_time >= iolat->min_lat_nsec)
+			stat->ps.missed++;
+		stat->ps.total++;
+	} else
+		blk_rq_stat_add(&stat->rqs, req_time);
+	put_cpu_ptr(stat);
+}
+
+static inline bool latency_sum_ok(struct iolatency_grp *iolat,
+				  struct latency_stat *stat)
+{
+	if (iolat->ssd) {
+		u64 thresh = div64_u64(stat->ps.total, 10);
+		thresh = max(thresh, 1ULL);
+		return stat->ps.missed < thresh;
+	}
+	return stat->rqs.mean <= iolat->min_lat_nsec;
+}
+
+static inline u64 latency_stat_samples(struct iolatency_grp *iolat,
+				       struct latency_stat *stat)
+{
+	if (iolat->ssd)
+		return stat->ps.total;
+	return stat->rqs.nr_samples;
+}
+
+static inline void iolat_update_total_lat_avg(struct iolatency_grp *iolat,
+					      struct latency_stat *stat)
+{
+	int exp_idx;
+
+	if (iolat->ssd)
+		return;
+
+	/*
+	 * CALC_LOAD takes in a number stored in fixed point representation.
+	 * Because we are using this for IO time in ns, the values stored
+	 * are significantly larger than the FIXED_1 denominator (2048).
+	 * Therefore, rounding errors in the calculation are negligible and
+	 * can be ignored.
+	 */
+	exp_idx = min_t(int, BLKIOLATENCY_NR_EXP_FACTORS - 1,
+			div64_u64(iolat->cur_win_nsec,
+				  BLKIOLATENCY_EXP_BUCKET_SIZE));
+	CALC_LOAD(iolat->lat_avg, iolatency_exp_factors[exp_idx], stat->rqs.mean);
+}
+
 static inline bool iolatency_may_queue(struct iolatency_grp *iolat,
 				       wait_queue_entry_t *wait,
 				       bool first_block)
@@ -255,7 +343,7 @@ static void scale_cookie_change(struct blk_iolatency *blkiolat,
 				struct child_latency_info *lat_info,
 				bool up)
 {
-	unsigned long qd = blk_queue_depth(blkiolat->rqos.q);
+	unsigned long qd = blkiolat->rqos.q->nr_requests;
 	unsigned long scale = scale_amount(qd, up);
 	unsigned long old = atomic_read(&lat_info->scale_cookie);
 	unsigned long max_scale = qd << 1;
@@ -295,10 +383,9 @@ static void scale_cookie_change(struct blk_iolatency *blkiolat,
  */
 static void scale_change(struct iolatency_grp *iolat, bool up)
 {
-	unsigned long qd = blk_queue_depth(iolat->blkiolat->rqos.q);
+	unsigned long qd = iolat->blkiolat->rqos.q->nr_requests;
 	unsigned long scale = scale_amount(qd, up);
 	unsigned long old = iolat->rq_depth.max_depth;
-	bool changed = false;
 
 	if (old > qd)
 		old = qd;
@@ -308,15 +395,13 @@ static void scale_change(struct iolatency_grp *iolat, bool up)
 			return;
 
 		if (old < qd) {
-			changed = true;
 			old += scale;
 			old = min(old, qd);
 			iolat->rq_depth.max_depth = old;
 			wake_up_all(&iolat->rq_wait.wait);
 		}
-	} else if (old > 1) {
+	} else {
 		old >>= 1;
-		changed = true;
 		iolat->rq_depth.max_depth = max(old, 1UL);
 	}
 }
@@ -369,7 +454,7 @@ static void check_scale_change(struct iolatency_grp *iolat)
 		 * scale down event.
 		 */
 		samples_thresh = lat_info->nr_samples * 5;
-		samples_thresh = div64_u64(samples_thresh, 100);
+		samples_thresh = max(1ULL, div64_u64(samples_thresh, 100));
 		if (iolat->nr_samples <= samples_thresh)
 			return;
 	}
@@ -395,34 +480,12 @@ static void blkcg_iolatency_throttle(struct rq_qos *rqos, struct bio *bio,
 				     spinlock_t *lock)
 {
 	struct blk_iolatency *blkiolat = BLKIOLATENCY(rqos);
-	struct blkcg *blkcg;
-	struct blkcg_gq *blkg;
-	struct request_queue *q = rqos->q;
+	struct blkcg_gq *blkg = bio->bi_blkg;
 	bool issue_as_root = bio_issue_as_root_blkg(bio);
 
 	if (!blk_iolatency_enabled(blkiolat))
 		return;
 
-	rcu_read_lock();
-	blkcg = bio_blkcg(bio);
-	bio_associate_blkcg(bio, &blkcg->css);
-	blkg = blkg_lookup(blkcg, q);
-	if (unlikely(!blkg)) {
-		if (!lock)
-			spin_lock_irq(q->queue_lock);
-		blkg = blkg_lookup_create(blkcg, q);
-		if (IS_ERR(blkg))
-			blkg = NULL;
-		if (!lock)
-			spin_unlock_irq(q->queue_lock);
-	}
-	if (!blkg)
-		goto out;
-
-	bio_issue_init(&bio->bi_issue, bio_sectors(bio));
-	bio_associate_blkg(bio, blkg);
-out:
-	rcu_read_unlock();
 	while (blkg && blkg->parent) {
 		struct iolatency_grp *iolat = blkg_to_lat(blkg);
 		if (!iolat) {
@@ -443,7 +506,6 @@ static void iolatency_record_time(struct iolatency_grp *iolat,
 				  struct bio_issue *issue, u64 now,
 				  bool issue_as_root)
 {
-	struct blk_rq_stat *rq_stat;
 	u64 start = bio_issue_time(issue);
 	u64 req_time;
 
@@ -469,9 +531,7 @@ static void iolatency_record_time(struct iolatency_grp *iolat,
 		return;
 	}
 
-	rq_stat = get_cpu_ptr(iolat->stats);
-	blk_rq_stat_add(rq_stat, req_time);
-	put_cpu_ptr(rq_stat);
+	latency_stat_record_time(iolat, req_time);
 }
 
 #define BLKIOLATENCY_MIN_ADJUST_TIME (500 * NSEC_PER_MSEC)
@@ -482,17 +542,17 @@ static void iolatency_check_latencies(struct iolatency_grp *iolat, u64 now)
 	struct blkcg_gq *blkg = lat_to_blkg(iolat);
 	struct iolatency_grp *parent;
 	struct child_latency_info *lat_info;
-	struct blk_rq_stat stat;
+	struct latency_stat stat;
 	unsigned long flags;
-	int cpu, exp_idx;
+	int cpu;
 
-	blk_rq_stat_init(&stat);
+	latency_stat_init(iolat, &stat);
 	preempt_disable();
 	for_each_online_cpu(cpu) {
-		struct blk_rq_stat *s;
+		struct latency_stat *s;
 		s = per_cpu_ptr(iolat->stats, cpu);
-		blk_rq_stat_sum(&stat, s);
-		blk_rq_stat_init(s);
+		latency_stat_sum(iolat, &stat, s);
+		latency_stat_init(iolat, s);
 	}
 	preempt_enable();
 
@@ -502,41 +562,36 @@ static void iolatency_check_latencies(struct iolatency_grp *iolat, u64 now)
 
 	lat_info = &parent->child_lat;
 
-	/*
-	 * CALC_LOAD takes in a number stored in fixed point representation.
-	 * Because we are using this for IO time in ns, the values stored
-	 * are significantly larger than the FIXED_1 denominator (2048).
-	 * Therefore, rounding errors in the calculation are negligible and
-	 * can be ignored.
-	 */
-	exp_idx = min_t(int, BLKIOLATENCY_NR_EXP_FACTORS - 1,
-			div64_u64(iolat->cur_win_nsec,
-				  BLKIOLATENCY_EXP_BUCKET_SIZE));
-	CALC_LOAD(iolat->lat_avg, iolatency_exp_factors[exp_idx], stat.mean);
+	iolat_update_total_lat_avg(iolat, &stat);
 
 	/* Everything is ok and we don't need to adjust the scale. */
-	if (stat.mean <= iolat->min_lat_nsec &&
+	if (latency_sum_ok(iolat, &stat) &&
 	    atomic_read(&lat_info->scale_cookie) == DEFAULT_SCALE_COOKIE)
 		return;
 
 	/* Somebody beat us to the punch, just bail. */
 	spin_lock_irqsave(&lat_info->lock, flags);
+
+	latency_stat_sum(iolat, &iolat->cur_stat, &stat);
 	lat_info->nr_samples -= iolat->nr_samples;
-	lat_info->nr_samples += stat.nr_samples;
-	iolat->nr_samples = stat.nr_samples;
+	lat_info->nr_samples += latency_stat_samples(iolat, &iolat->cur_stat);
+	iolat->nr_samples = latency_stat_samples(iolat, &iolat->cur_stat);
 
 	if ((lat_info->last_scale_event >= now ||
-	    now - lat_info->last_scale_event < BLKIOLATENCY_MIN_ADJUST_TIME) &&
-	    lat_info->scale_lat <= iolat->min_lat_nsec)
+	    now - lat_info->last_scale_event < BLKIOLATENCY_MIN_ADJUST_TIME))
 		goto out;
 
-	if (stat.mean <= iolat->min_lat_nsec &&
-	    stat.nr_samples >= BLKIOLATENCY_MIN_GOOD_SAMPLES) {
+	if (latency_sum_ok(iolat, &iolat->cur_stat) &&
+	    latency_sum_ok(iolat, &stat)) {
+		if (latency_stat_samples(iolat, &iolat->cur_stat) <
+		    BLKIOLATENCY_MIN_GOOD_SAMPLES)
+			goto out;
 		if (lat_info->scale_grp == iolat) {
 			lat_info->last_scale_event = now;
 			scale_cookie_change(iolat->blkiolat, lat_info, true);
 		}
-	} else if (stat.mean > iolat->min_lat_nsec) {
+	} else if (lat_info->scale_lat == 0 ||
+		   lat_info->scale_lat >= iolat->min_lat_nsec) {
 		lat_info->last_scale_event = now;
 		if (!lat_info->scale_grp ||
 		    lat_info->scale_lat > iolat->min_lat_nsec) {
@@ -545,6 +600,7 @@ static void iolatency_check_latencies(struct iolatency_grp *iolat, u64 now)
 		}
 		scale_cookie_change(iolat->blkiolat, lat_info, false);
 	}
+	latency_stat_init(iolat, &iolat->cur_stat);
 out:
 	spin_unlock_irqrestore(&lat_info->lock, flags);
 }
@@ -650,7 +706,7 @@ static void blkiolatency_timer_fn(struct timer_list *t)
 		 * We could be exiting, don't access the pd unless we have a
 		 * ref on the blkg.
 		 */
-		if (!blkg_try_get(blkg))
+		if (!blkg_tryget(blkg))
 			continue;
 
 		iolat = blkg_to_lat(blkg);
@@ -761,7 +817,6 @@ static ssize_t iolatency_set_limit(struct kernfs_open_file *of, char *buf,
 {
 	struct blkcg *blkcg = css_to_blkcg(of_css(of));
 	struct blkcg_gq *blkg;
-	struct blk_iolatency *blkiolat;
 	struct blkg_conf_ctx ctx;
 	struct iolatency_grp *iolat;
 	char *p, *tok;
@@ -774,7 +829,6 @@ static ssize_t iolatency_set_limit(struct kernfs_open_file *of, char *buf,
 		return ret;
 
 	iolat = blkg_to_lat(ctx.blkg);
-	blkiolat = iolat->blkiolat;
 	p = ctx.body;
 
 	ret = -EINVAL;
@@ -835,13 +889,43 @@ static int iolatency_print_limit(struct seq_file *sf, void *v)
 	return 0;
 }
 
+static size_t iolatency_ssd_stat(struct iolatency_grp *iolat, char *buf,
+				 size_t size)
+{
+	struct latency_stat stat;
+	int cpu;
+
+	latency_stat_init(iolat, &stat);
+	preempt_disable();
+	for_each_online_cpu(cpu) {
+		struct latency_stat *s;
+		s = per_cpu_ptr(iolat->stats, cpu);
+		latency_stat_sum(iolat, &stat, s);
+	}
+	preempt_enable();
+
+	if (iolat->rq_depth.max_depth == UINT_MAX)
+		return scnprintf(buf, size, " missed=%llu total=%llu depth=max",
+				 (unsigned long long)stat.ps.missed,
+				 (unsigned long long)stat.ps.total);
+	return scnprintf(buf, size, " missed=%llu total=%llu depth=%u",
+			 (unsigned long long)stat.ps.missed,
+			 (unsigned long long)stat.ps.total,
+			 iolat->rq_depth.max_depth);
+}
+
 static size_t iolatency_pd_stat(struct blkg_policy_data *pd, char *buf,
 				size_t size)
 {
 	struct iolatency_grp *iolat = pd_to_lat(pd);
-	unsigned long long avg_lat = div64_u64(iolat->lat_avg, NSEC_PER_USEC);
-	unsigned long long cur_win = div64_u64(iolat->cur_win_nsec, NSEC_PER_MSEC);
+	unsigned long long avg_lat;
+	unsigned long long cur_win;
+
+	if (iolat->ssd)
+		return iolatency_ssd_stat(iolat, buf, size);
 
+	avg_lat = div64_u64(iolat->lat_avg, NSEC_PER_USEC);
+	cur_win = div64_u64(iolat->cur_win_nsec, NSEC_PER_MSEC);
 	if (iolat->rq_depth.max_depth == UINT_MAX)
 		return scnprintf(buf, size, " depth=max avg_lat=%llu win=%llu",
 				 avg_lat, cur_win);
@@ -858,8 +942,8 @@ static struct blkg_policy_data *iolatency_pd_alloc(gfp_t gfp, int node)
 	iolat = kzalloc_node(sizeof(*iolat), gfp, node);
 	if (!iolat)
 		return NULL;
-	iolat->stats = __alloc_percpu_gfp(sizeof(struct blk_rq_stat),
-				       __alignof__(struct blk_rq_stat), gfp);
+	iolat->stats = __alloc_percpu_gfp(sizeof(struct latency_stat),
+				       __alignof__(struct latency_stat), gfp);
 	if (!iolat->stats) {
 		kfree(iolat);
 		return NULL;
@@ -876,15 +960,21 @@ static void iolatency_pd_init(struct blkg_policy_data *pd)
 	u64 now = ktime_to_ns(ktime_get());
 	int cpu;
 
+	if (blk_queue_nonrot(blkg->q))
+		iolat->ssd = true;
+	else
+		iolat->ssd = false;
+
 	for_each_possible_cpu(cpu) {
-		struct blk_rq_stat *stat;
+		struct latency_stat *stat;
 		stat = per_cpu_ptr(iolat->stats, cpu);
-		blk_rq_stat_init(stat);
+		latency_stat_init(iolat, stat);
 	}
 
+	latency_stat_init(iolat, &iolat->cur_stat);
 	rq_wait_init(&iolat->rq_wait);
 	spin_lock_init(&iolat->child_lat.lock);
-	iolat->rq_depth.queue_depth = blk_queue_depth(blkg->q);
+	iolat->rq_depth.queue_depth = blkg->q->nr_requests;
 	iolat->rq_depth.max_depth = UINT_MAX;
 	iolat->rq_depth.default_depth = iolat->rq_depth.queue_depth;
 	iolat->blkiolat = blkiolat;

block/blk-merge.c

@@ -12,6 +12,69 @@
 
 #include "blk.h"
 
+/*
+ * Check if the two bvecs from two bios can be merged to one segment.  If yes,
+ * no need to check gap between the two bios since the 1st bio and the 1st bvec
+ * in the 2nd bio can be handled in one segment.
+ */
+static inline bool bios_segs_mergeable(struct request_queue *q,
+		struct bio *prev, struct bio_vec *prev_last_bv,
+		struct bio_vec *next_first_bv)
+{
+	if (!biovec_phys_mergeable(q, prev_last_bv, next_first_bv))
+		return false;
+	if (prev->bi_seg_back_size + next_first_bv->bv_len >
+			queue_max_segment_size(q))
+		return false;
+	return true;
+}
+
+static inline bool bio_will_gap(struct request_queue *q,
+		struct request *prev_rq, struct bio *prev, struct bio *next)
+{
+	struct bio_vec pb, nb;
+
+	if (!bio_has_data(prev) || !queue_virt_boundary(q))
+		return false;
+
+	/*
+	 * Don't merge if the 1st bio starts with non-zero offset, otherwise it
+	 * is quite difficult to respect the sg gap limit.  We work hard to
+	 * merge a huge number of small single bios in case of mkfs.
+	 */
+	if (prev_rq)
+		bio_get_first_bvec(prev_rq->bio, &pb);
+	else
+		bio_get_first_bvec(prev, &pb);
+	if (pb.bv_offset)
+		return true;
+
+	/*
+	 * We don't need to worry about the situation that the merged segment
+	 * ends in unaligned virt boundary:
+	 *
+	 * - if 'pb' ends aligned, the merged segment ends aligned
+	 * - if 'pb' ends unaligned, the next bio must include
+	 *   one single bvec of 'nb', otherwise the 'nb' can't
+	 *   merge with 'pb'
+	 */
+	bio_get_last_bvec(prev, &pb);
+	bio_get_first_bvec(next, &nb);
+	if (bios_segs_mergeable(q, prev, &pb, &nb))
+		return false;
+	return __bvec_gap_to_prev(q, &pb, nb.bv_offset);
+}
+
+static inline bool req_gap_back_merge(struct request *req, struct bio *bio)
+{
+	return bio_will_gap(req->q, req, req->biotail, bio);
+}
+
+static inline bool req_gap_front_merge(struct request *req, struct bio *bio)
+{
+	return bio_will_gap(req->q, NULL, bio, req->bio);
+}
+
 static struct bio *blk_bio_discard_split(struct request_queue *q,
 					 struct bio *bio,
 					 struct bio_set *bs,
@@ -134,9 +197,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
 		if (bvprvp && blk_queue_cluster(q)) {
 			if (seg_size + bv.bv_len > queue_max_segment_size(q))
 				goto new_segment;
-			if (!BIOVEC_PHYS_MERGEABLE(bvprvp, &bv))
-				goto new_segment;
-			if (!BIOVEC_SEG_BOUNDARY(q, bvprvp, &bv))
+			if (!biovec_phys_mergeable(q, bvprvp, &bv))
 				goto new_segment;
 
 			seg_size += bv.bv_len;
@@ -267,9 +328,7 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
 				if (seg_size + bv.bv_len
 				    > queue_max_segment_size(q))
 					goto new_segment;
-				if (!BIOVEC_PHYS_MERGEABLE(&bvprv, &bv))
-					goto new_segment;
-				if (!BIOVEC_SEG_BOUNDARY(q, &bvprv, &bv))
+				if (!biovec_phys_mergeable(q, &bvprv, &bv))
 					goto new_segment;
 
 				seg_size += bv.bv_len;
@@ -349,17 +408,7 @@ static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
 	bio_get_last_bvec(bio, &end_bv);
 	bio_get_first_bvec(nxt, &nxt_bv);
 
-	if (!BIOVEC_PHYS_MERGEABLE(&end_bv, &nxt_bv))
-		return 0;
-
-	/*
-	 * bio and nxt are contiguous in memory; check if the queue allows
-	 * these two to be merged into one
-	 */
-	if (BIOVEC_SEG_BOUNDARY(q, &end_bv, &nxt_bv))
-		return 1;
-
-	return 0;
+	return biovec_phys_mergeable(q, &end_bv, &nxt_bv);
 }
 
 static inline void
@@ -373,10 +422,7 @@ __blk_segment_map_sg(struct request_queue *q, struct bio_vec *bvec,
 	if (*sg && *cluster) {
 		if ((*sg)->length + nbytes > queue_max_segment_size(q))
 			goto new_segment;
-
-		if (!BIOVEC_PHYS_MERGEABLE(bvprv, bvec))
-			goto new_segment;
-		if (!BIOVEC_SEG_BOUNDARY(q, bvprv, bvec))
+		if (!biovec_phys_mergeable(q, bvprv, bvec))
 			goto new_segment;
 
 		(*sg)->length += nbytes;

block/blk-mq-debugfs.c

@@ -102,6 +102,14 @@ static int blk_flags_show(struct seq_file *m, const unsigned long flags,
 	return 0;
 }
 
+static int queue_pm_only_show(void *data, struct seq_file *m)
+{
+	struct request_queue *q = data;
+
+	seq_printf(m, "%d\n", atomic_read(&q->pm_only));
+	return 0;
+}
+
 #define QUEUE_FLAG_NAME(name) [QUEUE_FLAG_##name] = #name
 static const char *const blk_queue_flag_name[] = {
 	QUEUE_FLAG_NAME(QUEUED),
@@ -132,7 +140,6 @@ static const char *const blk_queue_flag_name[] = {
 	QUEUE_FLAG_NAME(REGISTERED),
 	QUEUE_FLAG_NAME(SCSI_PASSTHROUGH),
 	QUEUE_FLAG_NAME(QUIESCED),
-	QUEUE_FLAG_NAME(PREEMPT_ONLY),
 };
 #undef QUEUE_FLAG_NAME
 
@@ -209,6 +216,7 @@ static ssize_t queue_write_hint_store(void *data, const char __user *buf,
 static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = {
 	{ "poll_stat", 0400, queue_poll_stat_show },
 	{ "requeue_list", 0400, .seq_ops = &queue_requeue_list_seq_ops },
+	{ "pm_only", 0600, queue_pm_only_show, NULL },
 	{ "state", 0600, queue_state_show, queue_state_write },
 	{ "write_hints", 0600, queue_write_hint_show, queue_write_hint_store },
 	{ "zone_wlock", 0400, queue_zone_wlock_show, NULL },
@@ -423,8 +431,7 @@ static void hctx_show_busy_rq(struct request *rq, void *data, bool reserved)
 {
 	const struct show_busy_params *params = data;
 
-	if (blk_mq_map_queue(rq->q, rq->mq_ctx->cpu) == params->hctx &&
-	    blk_mq_rq_state(rq) != MQ_RQ_IDLE)
+	if (blk_mq_map_queue(rq->q, rq->mq_ctx->cpu) == params->hctx)
 		__blk_mq_debugfs_rq_show(params->m,
 					 list_entry_rq(&rq->queuelist));
 }

block/blk-mq-sched.h

@@ -49,12 +49,12 @@ blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
 	return true;
 }
 
-static inline void blk_mq_sched_completed_request(struct request *rq)
+static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
 {
 	struct elevator_queue *e = rq->q->elevator;
 
 	if (e && e->type->ops.mq.completed_request)
-		e->type->ops.mq.completed_request(rq);
+		e->type->ops.mq.completed_request(rq, now);
 }
 
 static inline void blk_mq_sched_started_request(struct request *rq)

block/blk-mq-tag.c

@@ -232,13 +232,26 @@ static bool bt_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
 
 	/*
 	 * We can hit rq == NULL here, because the tagging functions
-	 * test and set the bit before assining ->rqs[].
+	 * test and set the bit before assigning ->rqs[].
 	 */
 	if (rq && rq->q == hctx->queue)
 		iter_data->fn(hctx, rq, iter_data->data, reserved);
 	return true;
 }
 
+/**
+ * bt_for_each - iterate over the requests associated with a hardware queue
+ * @hctx:	Hardware queue to examine.
+ * @bt:		sbitmap to examine. This is either the breserved_tags member
+ *		or the bitmap_tags member of struct blk_mq_tags.
+ * @fn:		Pointer to the function that will be called for each request
+ *		associated with @hctx that has been assigned a driver tag.
+ *		@fn will be called as follows: @fn(@hctx, rq, @data, @reserved)
+ *		where rq is a pointer to a request.
+ * @data:	Will be passed as third argument to @fn.
+ * @reserved:	Indicates whether @bt is the breserved_tags member or the
+ *		bitmap_tags member of struct blk_mq_tags.
+ */
 static void bt_for_each(struct blk_mq_hw_ctx *hctx, struct sbitmap_queue *bt,
 			busy_iter_fn *fn, void *data, bool reserved)
 {
@@ -280,6 +293,18 @@ static bool bt_tags_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
 	return true;
 }
 
+/**
+ * bt_tags_for_each - iterate over the requests in a tag map
+ * @tags:	Tag map to iterate over.
+ * @bt:		sbitmap to examine. This is either the breserved_tags member
+ *		or the bitmap_tags member of struct blk_mq_tags.
+ * @fn:		Pointer to the function that will be called for each started
+ *		request. @fn will be called as follows: @fn(rq, @data,
+ *		@reserved) where rq is a pointer to a request.
+ * @data:	Will be passed as second argument to @fn.
+ * @reserved:	Indicates whether @bt is the breserved_tags member or the
+ *		bitmap_tags member of struct blk_mq_tags.
+ */
 static void bt_tags_for_each(struct blk_mq_tags *tags, struct sbitmap_queue *bt,
 			     busy_tag_iter_fn *fn, void *data, bool reserved)
 {
@@ -294,6 +319,15 @@ static void bt_tags_for_each(struct blk_mq_tags *tags, struct sbitmap_queue *bt,
 		sbitmap_for_each_set(&bt->sb, bt_tags_iter, &iter_data);
 }
 
+/**
+ * blk_mq_all_tag_busy_iter - iterate over all started requests in a tag map
+ * @tags:	Tag map to iterate over.
+ * @fn:		Pointer to the function that will be called for each started
+ *		request. @fn will be called as follows: @fn(rq, @priv,
+ *		reserved) where rq is a pointer to a request. 'reserved'
+ *		indicates whether or not @rq is a reserved request.
+ * @priv:	Will be passed as second argument to @fn.
+ */
 static void blk_mq_all_tag_busy_iter(struct blk_mq_tags *tags,
 		busy_tag_iter_fn *fn, void *priv)
 {
@@ -302,6 +336,15 @@ static void blk_mq_all_tag_busy_iter(struct blk_mq_tags *tags,
 	bt_tags_for_each(tags, &tags->bitmap_tags, fn, priv, false);
 }
 
+/**
+ * blk_mq_tagset_busy_iter - iterate over all started requests in a tag set
+ * @tagset:	Tag set to iterate over.
+ * @fn:		Pointer to the function that will be called for each started
+ *		request. @fn will be called as follows: @fn(rq, @priv,
+ *		reserved) where rq is a pointer to a request. 'reserved'
+ *		indicates whether or not @rq is a reserved request.
+ * @priv:	Will be passed as second argument to @fn.
+ */
 void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset,
 		busy_tag_iter_fn *fn, void *priv)
 {
@@ -314,6 +357,20 @@ void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset,
 }
 EXPORT_SYMBOL(blk_mq_tagset_busy_iter);
 
+/**
+ * blk_mq_queue_tag_busy_iter - iterate over all requests with a driver tag
+ * @q:		Request queue to examine.
+ * @fn:		Pointer to the function that will be called for each request
+ *		on @q. @fn will be called as follows: @fn(hctx, rq, @priv,
+ *		reserved) where rq is a pointer to a request and hctx points
+ *		to the hardware queue associated with the request. 'reserved'
+ *		indicates whether or not @rq is a reserved request.
+ * @priv:	Will be passed as third argument to @fn.
+ *
+ * Note: if @q->tag_set is shared with other request queues then @fn will be
+ * called for all requests on all queues that share that tag set and not only
+ * for requests associated with @q.
+ */
 void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
 		void *priv)
 {
@@ -321,9 +378,11 @@ void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
 	int i;
 
 	/*
-	 * __blk_mq_update_nr_hw_queues will update the nr_hw_queues and
-	 * queue_hw_ctx after freeze the queue, so we use q_usage_counter
-	 * to avoid race with it.
+	 * __blk_mq_update_nr_hw_queues() updates nr_hw_queues and queue_hw_ctx
+	 * while the queue is frozen. So we can use q_usage_counter to avoid
+	 * racing with it. __blk_mq_update_nr_hw_queues() uses
+	 * synchronize_rcu() to ensure this function left the critical section
+	 * below.
 	 */
 	if (!percpu_ref_tryget(&q->q_usage_counter))
 		return;
@@ -332,7 +391,7 @@ void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
 		struct blk_mq_tags *tags = hctx->tags;
 
 		/*
-		 * If not software queues are currently mapped to this
+		 * If no software queues are currently mapped to this
 		 * hardware queue, there's nothing to check
 		 */
 		if (!blk_mq_hw_queue_mapped(hctx))

block/blk-mq.c

@@ -33,6 +33,7 @@
 #include "blk-mq.h"
 #include "blk-mq-debugfs.h"
 #include "blk-mq-tag.h"
+#include "blk-pm.h"
 #include "blk-stat.h"
 #include "blk-mq-sched.h"
 #include "blk-rq-qos.h"
@@ -198,7 +199,7 @@ void blk_mq_unfreeze_queue(struct request_queue *q)
 	freeze_depth = atomic_dec_return(&q->mq_freeze_depth);
 	WARN_ON_ONCE(freeze_depth < 0);
 	if (!freeze_depth) {
-		percpu_ref_reinit(&q->q_usage_counter);
+		percpu_ref_resurrect(&q->q_usage_counter);
 		wake_up_all(&q->mq_freeze_wq);
 	}
 }
@@ -475,6 +476,7 @@ static void __blk_mq_free_request(struct request *rq)
 	struct blk_mq_hw_ctx *hctx = blk_mq_map_queue(q, ctx->cpu);
 	const int sched_tag = rq->internal_tag;
 
+	blk_pm_mark_last_busy(rq);
 	if (rq->tag != -1)
 		blk_mq_put_tag(hctx, hctx->tags, ctx, rq->tag);
 	if (sched_tag != -1)
@@ -526,6 +528,9 @@ inline void __blk_mq_end_request(struct request *rq, blk_status_t error)
 		blk_stat_add(rq, now);
 	}
 
+	if (rq->internal_tag != -1)
+		blk_mq_sched_completed_request(rq, now);
+
 	blk_account_io_done(rq, now);
 
 	if (rq->end_io) {
@@ -562,8 +567,20 @@ static void __blk_mq_complete_request(struct request *rq)
 
 	if (!blk_mq_mark_complete(rq))
 		return;
-	if (rq->internal_tag != -1)
-		blk_mq_sched_completed_request(rq);
+
+	/*
+	 * Most of single queue controllers, there is only one irq vector
+	 * for handling IO completion, and the only irq's affinity is set
+	 * as all possible CPUs. On most of ARCHs, this affinity means the
+	 * irq is handled on one specific CPU.
+	 *
+	 * So complete IO reqeust in softirq context in case of single queue
+	 * for not degrading IO performance by irqsoff latency.
+	 */
+	if (rq->q->nr_hw_queues == 1) {
+		__blk_complete_request(rq);
+		return;
+	}
 
 	if (!test_bit(QUEUE_FLAG_SAME_COMP, &rq->q->queue_flags)) {
 		rq->q->softirq_done_fn(rq);
@@ -2137,8 +2154,6 @@ static void blk_mq_exit_hctx(struct request_queue *q,
 		struct blk_mq_tag_set *set,
 		struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx)
 {
-	blk_mq_debugfs_unregister_hctx(hctx);
-
 	if (blk_mq_hw_queue_mapped(hctx))
 		blk_mq_tag_idle(hctx);
 
@@ -2165,6 +2180,7 @@ static void blk_mq_exit_hw_queues(struct request_queue *q,
 	queue_for_each_hw_ctx(q, hctx, i) {
 		if (i == nr_queue)
 			break;
+		blk_mq_debugfs_unregister_hctx(hctx);
 		blk_mq_exit_hctx(q, set, hctx, i);
 	}
 }
@@ -2194,12 +2210,12 @@ static int blk_mq_init_hctx(struct request_queue *q,
 	 * runtime
 	 */
 	hctx->ctxs = kmalloc_array_node(nr_cpu_ids, sizeof(void *),
-					GFP_KERNEL, node);
+			GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY, node);
 	if (!hctx->ctxs)
 		goto unregister_cpu_notifier;
 
-	if (sbitmap_init_node(&hctx->ctx_map, nr_cpu_ids, ilog2(8), GFP_KERNEL,
-			      node))
+	if (sbitmap_init_node(&hctx->ctx_map, nr_cpu_ids, ilog2(8),
+				GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY, node))
 		goto free_ctxs;
 
 	hctx->nr_ctx = 0;
@@ -2212,7 +2228,8 @@ static int blk_mq_init_hctx(struct request_queue *q,
 	    set->ops->init_hctx(hctx, set->driver_data, hctx_idx))
 		goto free_bitmap;
 
-	hctx->fq = blk_alloc_flush_queue(q, hctx->numa_node, set->cmd_size);
+	hctx->fq = blk_alloc_flush_queue(q, hctx->numa_node, set->cmd_size,
+			GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY);
 	if (!hctx->fq)
 		goto exit_hctx;
 
@@ -2222,8 +2239,6 @@ static int blk_mq_init_hctx(struct request_queue *q,
 	if (hctx->flags & BLK_MQ_F_BLOCKING)
 		init_srcu_struct(hctx->srcu);
 
-	blk_mq_debugfs_register_hctx(q, hctx);
-
 	return 0;
 
  free_fq:
@@ -2492,6 +2507,39 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set)
 }
 EXPORT_SYMBOL(blk_mq_init_queue);
 
+/*
+ * Helper for setting up a queue with mq ops, given queue depth, and
+ * the passed in mq ops flags.
+ */
+struct request_queue *blk_mq_init_sq_queue(struct blk_mq_tag_set *set,
+					   const struct blk_mq_ops *ops,
+					   unsigned int queue_depth,
+					   unsigned int set_flags)
+{
+	struct request_queue *q;
+	int ret;
+
+	memset(set, 0, sizeof(*set));
+	set->ops = ops;
+	set->nr_hw_queues = 1;
+	set->queue_depth = queue_depth;
+	set->numa_node = NUMA_NO_NODE;
+	set->flags = set_flags;
+
+	ret = blk_mq_alloc_tag_set(set);
+	if (ret)
+		return ERR_PTR(ret);
+
+	q = blk_mq_init_queue(set);
+	if (IS_ERR(q)) {
+		blk_mq_free_tag_set(set);
+		return q;
+	}
+
+	return q;
+}
+EXPORT_SYMBOL(blk_mq_init_sq_queue);
+
 static int blk_mq_hw_ctx_size(struct blk_mq_tag_set *tag_set)
 {
 	int hw_ctx_size = sizeof(struct blk_mq_hw_ctx);
@@ -2506,48 +2554,90 @@ static int blk_mq_hw_ctx_size(struct blk_mq_tag_set *tag_set)
 	return hw_ctx_size;
 }
 
+static struct blk_mq_hw_ctx *blk_mq_alloc_and_init_hctx(
+		struct blk_mq_tag_set *set, struct request_queue *q,
+		int hctx_idx, int node)
+{
+	struct blk_mq_hw_ctx *hctx;
+
+	hctx = kzalloc_node(blk_mq_hw_ctx_size(set),
+			GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY,
+			node);
+	if (!hctx)
+		return NULL;
+
+	if (!zalloc_cpumask_var_node(&hctx->cpumask,
+				GFP_NOIO | __GFP_NOWARN | __GFP_NORETRY,
+				node)) {
+		kfree(hctx);
+		return NULL;
+	}
+
+	atomic_set(&hctx->nr_active, 0);
+	hctx->numa_node = node;
+	hctx->queue_num = hctx_idx;
+
+	if (blk_mq_init_hctx(q, set, hctx, hctx_idx)) {
+		free_cpumask_var(hctx->cpumask);
+		kfree(hctx);
+		return NULL;
+	}
+	blk_mq_hctx_kobj_init(hctx);
+
+	return hctx;
+}
+
 static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set,
 						struct request_queue *q)
 {
-	int i, j;
+	int i, j, end;
 	struct blk_mq_hw_ctx **hctxs = q->queue_hw_ctx;
 
-	blk_mq_sysfs_unregister(q);
-
 	/* protect against switching io scheduler  */
 	mutex_lock(&q->sysfs_lock);
 	for (i = 0; i < set->nr_hw_queues; i++) {
 		int node;
-
-		if (hctxs[i])
-			continue;
+		struct blk_mq_hw_ctx *hctx;
 
 		node = blk_mq_hw_queue_to_node(q->mq_map, i);
-		hctxs[i] = kzalloc_node(blk_mq_hw_ctx_size(set),
-					GFP_KERNEL, node);
-		if (!hctxs[i])
-			break;
-
-		if (!zalloc_cpumask_var_node(&hctxs[i]->cpumask, GFP_KERNEL,
-						node)) {
-			kfree(hctxs[i]);
-			hctxs[i] = NULL;
-			break;
-		}
-
-		atomic_set(&hctxs[i]->nr_active, 0);
-		hctxs[i]->numa_node = node;
-		hctxs[i]->queue_num = i;
+		/*
+		 * If the hw queue has been mapped to another numa node,
+		 * we need to realloc the hctx. If allocation fails, fallback
+		 * to use the previous one.
+		 */
+		if (hctxs[i] && (hctxs[i]->numa_node == node))
+			continue;
 
-		if (blk_mq_init_hctx(q, set, hctxs[i], i)) {
-			free_cpumask_var(hctxs[i]->cpumask);
-			kfree(hctxs[i]);
-			hctxs[i] = NULL;
-			break;
+		hctx = blk_mq_alloc_and_init_hctx(set, q, i, node);
+		if (hctx) {
+			if (hctxs[i]) {
+				blk_mq_exit_hctx(q, set, hctxs[i], i);
+				kobject_put(&hctxs[i]->kobj);
+			}
+			hctxs[i] = hctx;
+		} else {
+			if (hctxs[i])
+				pr_warn("Allocate new hctx on node %d fails,\
+						fallback to previous one on node %d\n",
+						node, hctxs[i]->numa_node);
+			else
+				break;
 		}
-		blk_mq_hctx_kobj_init(hctxs[i]);
 	}
-	for (j = i; j < q->nr_hw_queues; j++) {
+	/*
+	 * Increasing nr_hw_queues fails. Free the newly allocated
+	 * hctxs and keep the previous q->nr_hw_queues.
+	 */
+	if (i != set->nr_hw_queues) {
+		j = q->nr_hw_queues;
+		end = i;
+	} else {
+		j = i;
+		end = q->nr_hw_queues;
+		q->nr_hw_queues = set->nr_hw_queues;
+	}
+
+	for (; j < end; j++) {
 		struct blk_mq_hw_ctx *hctx = hctxs[j];
 
 		if (hctx) {
@@ -2559,9 +2649,7 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set,
 
 		}
 	}
-	q->nr_hw_queues = i;
 	mutex_unlock(&q->sysfs_lock);
-	blk_mq_sysfs_register(q);
 }
 
 struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
@@ -2659,25 +2747,6 @@ void blk_mq_free_queue(struct request_queue *q)
 	blk_mq_exit_hw_queues(q, set, set->nr_hw_queues);
 }
 
-/* Basically redo blk_mq_init_queue with queue frozen */
-static void blk_mq_queue_reinit(struct request_queue *q)
-{
-	WARN_ON_ONCE(!atomic_read(&q->mq_freeze_depth));
-
-	blk_mq_debugfs_unregister_hctxs(q);
-	blk_mq_sysfs_unregister(q);
-
-	/*
-	 * redo blk_mq_init_cpu_queues and blk_mq_init_hw_queues. FIXME: maybe
-	 * we should change hctx numa_node according to the new topology (this
-	 * involves freeing and re-allocating memory, worth doing?)
-	 */
-	blk_mq_map_swqueue(q);
-
-	blk_mq_sysfs_register(q);
-	blk_mq_debugfs_register_hctxs(q);
-}
-
 static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set)
 {
 	int i;
@@ -2964,6 +3033,7 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
 {
 	struct request_queue *q;
 	LIST_HEAD(head);
+	int prev_nr_hw_queues;
 
 	lockdep_assert_held(&set->tag_list_lock);
 
@@ -2987,11 +3057,30 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
 		if (!blk_mq_elv_switch_none(&head, q))
 			goto switch_back;
 
+	list_for_each_entry(q, &set->tag_list, tag_set_list) {
+		blk_mq_debugfs_unregister_hctxs(q);
+		blk_mq_sysfs_unregister(q);
+	}
+
+	prev_nr_hw_queues = set->nr_hw_queues;
 	set->nr_hw_queues = nr_hw_queues;
 	blk_mq_update_queue_map(set);
+fallback:
 	list_for_each_entry(q, &set->tag_list, tag_set_list) {
 		blk_mq_realloc_hw_ctxs(set, q);
-		blk_mq_queue_reinit(q);
+		if (q->nr_hw_queues != set->nr_hw_queues) {
+			pr_warn("Increasing nr_hw_queues to %d fails, fallback to %d\n",
+					nr_hw_queues, prev_nr_hw_queues);
+			set->nr_hw_queues = prev_nr_hw_queues;
+			blk_mq_map_queues(set);
+			goto fallback;
+		}
+		blk_mq_map_swqueue(q);
+	}
+
+	list_for_each_entry(q, &set->tag_list, tag_set_list) {
+		blk_mq_sysfs_register(q);
+		blk_mq_debugfs_register_hctxs(q);
 	}
 
 switch_back:

block/blk-pm.c

@@ -0,0 +1,216 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/blk-mq.h>
+#include <linux/blk-pm.h>
+#include <linux/blkdev.h>
+#include <linux/pm_runtime.h>
+#include "blk-mq.h"
+#include "blk-mq-tag.h"
+
+/**
+ * blk_pm_runtime_init - Block layer runtime PM initialization routine
+ * @q: the queue of the device
+ * @dev: the device the queue belongs to
+ *
+ * Description:
+ *    Initialize runtime-PM-related fields for @q and start auto suspend for
+ *    @dev. Drivers that want to take advantage of request-based runtime PM
+ *    should call this function after @dev has been initialized, and its
+ *    request queue @q has been allocated, and runtime PM for it can not happen
+ *    yet(either due to disabled/forbidden or its usage_count > 0). In most
+ *    cases, driver should call this function before any I/O has taken place.
+ *
+ *    This function takes care of setting up using auto suspend for the device,
+ *    the autosuspend delay is set to -1 to make runtime suspend impossible
+ *    until an updated value is either set by user or by driver. Drivers do
+ *    not need to touch other autosuspend settings.
+ *
+ *    The block layer runtime PM is request based, so only works for drivers
+ *    that use request as their IO unit instead of those directly use bio's.
+ */
+void blk_pm_runtime_init(struct request_queue *q, struct device *dev)
+{
+	q->dev = dev;
+	q->rpm_status = RPM_ACTIVE;
+	pm_runtime_set_autosuspend_delay(q->dev, -1);
+	pm_runtime_use_autosuspend(q->dev);
+}
+EXPORT_SYMBOL(blk_pm_runtime_init);
+
+/**
+ * blk_pre_runtime_suspend - Pre runtime suspend check
+ * @q: the queue of the device
+ *
+ * Description:
+ *    This function will check if runtime suspend is allowed for the device
+ *    by examining if there are any requests pending in the queue. If there
+ *    are requests pending, the device can not be runtime suspended; otherwise,
+ *    the queue's status will be updated to SUSPENDING and the driver can
+ *    proceed to suspend the device.
+ *
+ *    For the not allowed case, we mark last busy for the device so that
+ *    runtime PM core will try to autosuspend it some time later.
+ *
+ *    This function should be called near the start of the device's
+ *    runtime_suspend callback.
+ *
+ * Return:
+ *    0		- OK to runtime suspend the device
+ *    -EBUSY	- Device should not be runtime suspended
+ */
+int blk_pre_runtime_suspend(struct request_queue *q)
+{
+	int ret = 0;
+
+	if (!q->dev)
+		return ret;
+
+	WARN_ON_ONCE(q->rpm_status != RPM_ACTIVE);
+
+	/*
+	 * Increase the pm_only counter before checking whether any
+	 * non-PM blk_queue_enter() calls are in progress to avoid that any
+	 * new non-PM blk_queue_enter() calls succeed before the pm_only
+	 * counter is decreased again.
+	 */
+	blk_set_pm_only(q);
+	ret = -EBUSY;
+	/* Switch q_usage_counter from per-cpu to atomic mode. */
+	blk_freeze_queue_start(q);
+	/*
+	 * Wait until atomic mode has been reached. Since that
+	 * involves calling call_rcu(), it is guaranteed that later
+	 * blk_queue_enter() calls see the pm-only state. See also
+	 * http://lwn.net/Articles/573497/.
+	 */
+	percpu_ref_switch_to_atomic_sync(&q->q_usage_counter);
+	if (percpu_ref_is_zero(&q->q_usage_counter))
+		ret = 0;
+	/* Switch q_usage_counter back to per-cpu mode. */
+	blk_mq_unfreeze_queue(q);
+
+	spin_lock_irq(q->queue_lock);
+	if (ret < 0)
+		pm_runtime_mark_last_busy(q->dev);
+	else
+		q->rpm_status = RPM_SUSPENDING;
+	spin_unlock_irq(q->queue_lock);
+
+	if (ret)
+		blk_clear_pm_only(q);
+
+	return ret;
+}
+EXPORT_SYMBOL(blk_pre_runtime_suspend);
+
+/**
+ * blk_post_runtime_suspend - Post runtime suspend processing
+ * @q: the queue of the device
+ * @err: return value of the device's runtime_suspend function
+ *
+ * Description:
+ *    Update the queue's runtime status according to the return value of the
+ *    device's runtime suspend function and mark last busy for the device so
+ *    that PM core will try to auto suspend the device at a later time.
+ *
+ *    This function should be called near the end of the device's
+ *    runtime_suspend callback.
+ */
+void blk_post_runtime_suspend(struct request_queue *q, int err)
+{
+	if (!q->dev)
+		return;
+
+	spin_lock_irq(q->queue_lock);
+	if (!err) {
+		q->rpm_status = RPM_SUSPENDED;
+	} else {
+		q->rpm_status = RPM_ACTIVE;
+		pm_runtime_mark_last_busy(q->dev);
+	}
+	spin_unlock_irq(q->queue_lock);
+
+	if (err)
+		blk_clear_pm_only(q);
+}
+EXPORT_SYMBOL(blk_post_runtime_suspend);
+
+/**
+ * blk_pre_runtime_resume - Pre runtime resume processing
+ * @q: the queue of the device
+ *
+ * Description:
+ *    Update the queue's runtime status to RESUMING in preparation for the
+ *    runtime resume of the device.
+ *
+ *    This function should be called near the start of the device's
+ *    runtime_resume callback.
+ */
+void blk_pre_runtime_resume(struct request_queue *q)
+{
+	if (!q->dev)
+		return;
+
+	spin_lock_irq(q->queue_lock);
+	q->rpm_status = RPM_RESUMING;
+	spin_unlock_irq(q->queue_lock);
+}
+EXPORT_SYMBOL(blk_pre_runtime_resume);
+
+/**
+ * blk_post_runtime_resume - Post runtime resume processing
+ * @q: the queue of the device
+ * @err: return value of the device's runtime_resume function
+ *
+ * Description:
+ *    Update the queue's runtime status according to the return value of the
+ *    device's runtime_resume function. If it is successfully resumed, process
+ *    the requests that are queued into the device's queue when it is resuming
+ *    and then mark last busy and initiate autosuspend for it.
+ *
+ *    This function should be called near the end of the device's
+ *    runtime_resume callback.
+ */
+void blk_post_runtime_resume(struct request_queue *q, int err)
+{
+	if (!q->dev)
+		return;
+
+	spin_lock_irq(q->queue_lock);
+	if (!err) {
+		q->rpm_status = RPM_ACTIVE;
+		pm_runtime_mark_last_busy(q->dev);
+		pm_request_autosuspend(q->dev);
+	} else {
+		q->rpm_status = RPM_SUSPENDED;
+	}
+	spin_unlock_irq(q->queue_lock);
+
+	if (!err)
+		blk_clear_pm_only(q);
+}
+EXPORT_SYMBOL(blk_post_runtime_resume);
+
+/**
+ * blk_set_runtime_active - Force runtime status of the queue to be active
+ * @q: the queue of the device
+ *
+ * If the device is left runtime suspended during system suspend the resume
+ * hook typically resumes the device and corrects runtime status
+ * accordingly. However, that does not affect the queue runtime PM status
+ * which is still "suspended". This prevents processing requests from the
+ * queue.
+ *
+ * This function can be used in driver's resume hook to correct queue
+ * runtime PM status and re-enable peeking requests from the queue. It
+ * should be called before first request is added to the queue.
+ */
+void blk_set_runtime_active(struct request_queue *q)
+{
+	spin_lock_irq(q->queue_lock);
+	q->rpm_status = RPM_ACTIVE;
+	pm_runtime_mark_last_busy(q->dev);
+	pm_request_autosuspend(q->dev);
+	spin_unlock_irq(q->queue_lock);
+}
+EXPORT_SYMBOL(blk_set_runtime_active);

block/blk-pm.h

@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _BLOCK_BLK_PM_H_
+#define _BLOCK_BLK_PM_H_
+
+#include <linux/pm_runtime.h>
+
+#ifdef CONFIG_PM
+static inline void blk_pm_request_resume(struct request_queue *q)
+{
+	if (q->dev && (q->rpm_status == RPM_SUSPENDED ||
+		       q->rpm_status == RPM_SUSPENDING))
+		pm_request_resume(q->dev);
+}
+
+static inline void blk_pm_mark_last_busy(struct request *rq)
+{
+	if (rq->q->dev && !(rq->rq_flags & RQF_PM))
+		pm_runtime_mark_last_busy(rq->q->dev);
+}
+
+static inline void blk_pm_requeue_request(struct request *rq)
+{
+	lockdep_assert_held(rq->q->queue_lock);
+
+	if (rq->q->dev && !(rq->rq_flags & RQF_PM))
+		rq->q->nr_pending--;
+}
+
+static inline void blk_pm_add_request(struct request_queue *q,
+				      struct request *rq)
+{
+	lockdep_assert_held(q->queue_lock);
+
+	if (q->dev && !(rq->rq_flags & RQF_PM))
+		q->nr_pending++;
+}
+
+static inline void blk_pm_put_request(struct request *rq)
+{
+	lockdep_assert_held(rq->q->queue_lock);
+
+	if (rq->q->dev && !(rq->rq_flags & RQF_PM))
+		--rq->q->nr_pending;
+}
+#else
+static inline void blk_pm_request_resume(struct request_queue *q)
+{
+}
+
+static inline void blk_pm_mark_last_busy(struct request *rq)
+{
+}
+
+static inline void blk_pm_requeue_request(struct request *rq)
+{
+}
+
+static inline void blk_pm_add_request(struct request_queue *q,
+				      struct request *rq)
+{
+}
+
+static inline void blk_pm_put_request(struct request *rq)
+{
+}
+#endif
+
+#endif /* _BLOCK_BLK_PM_H_ */

block/blk-softirq.c

@@ -97,8 +97,8 @@ static int blk_softirq_cpu_dead(unsigned int cpu)
 
 void __blk_complete_request(struct request *req)
 {
-	int ccpu, cpu;
 	struct request_queue *q = req->q;
+	int cpu, ccpu = q->mq_ops ? req->mq_ctx->cpu : req->cpu;
 	unsigned long flags;
 	bool shared = false;
 
@@ -110,8 +110,7 @@ void __blk_complete_request(struct request *req)
 	/*
 	 * Select completion CPU
 	 */
-	if (req->cpu != -1) {
-		ccpu = req->cpu;
+	if (test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags) && ccpu != -1) {
 		if (!test_bit(QUEUE_FLAG_SAME_FORCE, &q->queue_flags))
 			shared = cpus_share_cache(cpu, ccpu);
 	} else

block/blk-stat.c

@@ -190,6 +190,7 @@ void blk_stat_enable_accounting(struct request_queue *q)
 	blk_queue_flag_set(QUEUE_FLAG_STATS, q);
 	spin_unlock(&q->stats->lock);
 }
+EXPORT_SYMBOL_GPL(blk_stat_enable_accounting);
 
 struct blk_queue_stats *blk_alloc_queue_stats(void)
 {

block/blk-throttle.c

@@ -84,8 +84,7 @@ struct throtl_service_queue {
 	 * RB tree of active children throtl_grp's, which are sorted by
 	 * their ->disptime.
 	 */
-	struct rb_root		pending_tree;	/* RB tree of active tgs */
-	struct rb_node		*first_pending;	/* first node in the tree */
+	struct rb_root_cached	pending_tree;	/* RB tree of active tgs */
 	unsigned int		nr_pending;	/* # queued in the tree */
 	unsigned long		first_pending_disptime;	/* disptime of the first tg */
 	struct timer_list	pending_timer;	/* fires on first_pending_disptime */
@@ -475,7 +474,7 @@ static void throtl_service_queue_init(struct throtl_service_queue *sq)
 {
 	INIT_LIST_HEAD(&sq->queued[0]);
 	INIT_LIST_HEAD(&sq->queued[1]);
-	sq->pending_tree = RB_ROOT;
+	sq->pending_tree = RB_ROOT_CACHED;
 	timer_setup(&sq->pending_timer, throtl_pending_timer_fn, 0);
 }
 
@@ -616,31 +615,23 @@ static void throtl_pd_free(struct blkg_policy_data *pd)
 static struct throtl_grp *
 throtl_rb_first(struct throtl_service_queue *parent_sq)
 {
+	struct rb_node *n;
 	/* Service tree is empty */
 	if (!parent_sq->nr_pending)
 		return NULL;
 
-	if (!parent_sq->first_pending)
-		parent_sq->first_pending = rb_first(&parent_sq->pending_tree);
-
-	if (parent_sq->first_pending)
-		return rb_entry_tg(parent_sq->first_pending);
-
-	return NULL;
-}
-
-static void rb_erase_init(struct rb_node *n, struct rb_root *root)
-{
-	rb_erase(n, root);
-	RB_CLEAR_NODE(n);
+	n = rb_first_cached(&parent_sq->pending_tree);
+	WARN_ON_ONCE(!n);
+	if (!n)
+		return NULL;
+	return rb_entry_tg(n);
 }
 
 static void throtl_rb_erase(struct rb_node *n,
 			    struct throtl_service_queue *parent_sq)
 {
-	if (parent_sq->first_pending == n)
-		parent_sq->first_pending = NULL;
-	rb_erase_init(n, &parent_sq->pending_tree);
+	rb_erase_cached(n, &parent_sq->pending_tree);
+	RB_CLEAR_NODE(n);
 	--parent_sq->nr_pending;
 }
 
@@ -658,11 +649,11 @@ static void update_min_dispatch_time(struct throtl_service_queue *parent_sq)
 static void tg_service_queue_add(struct throtl_grp *tg)
 {
 	struct throtl_service_queue *parent_sq = tg->service_queue.parent_sq;
-	struct rb_node **node = &parent_sq->pending_tree.rb_node;
+	struct rb_node **node = &parent_sq->pending_tree.rb_root.rb_node;
 	struct rb_node *parent = NULL;
 	struct throtl_grp *__tg;
 	unsigned long key = tg->disptime;
-	int left = 1;
+	bool leftmost = true;
 
 	while (*node != NULL) {
 		parent = *node;
@@ -672,15 +663,13 @@ static void tg_service_queue_add(struct throtl_grp *tg)
 			node = &parent->rb_left;
 		else {
 			node = &parent->rb_right;
-			left = 0;
+			leftmost = false;
 		}
 	}
 
-	if (left)
-		parent_sq->first_pending = &tg->rb_node;
-
 	rb_link_node(&tg->rb_node, parent, node);
-	rb_insert_color(&tg->rb_node, &parent_sq->pending_tree);
+	rb_insert_color_cached(&tg->rb_node, &parent_sq->pending_tree,
+			       leftmost);
 }
 
 static void __throtl_enqueue_tg(struct throtl_grp *tg)
@@ -2126,21 +2115,11 @@ static inline void throtl_update_latency_buckets(struct throtl_data *td)
 }
 #endif
 
-static void blk_throtl_assoc_bio(struct throtl_grp *tg, struct bio *bio)
-{
-#ifdef CONFIG_BLK_DEV_THROTTLING_LOW
-	/* fallback to root_blkg if we fail to get a blkg ref */
-	if (bio->bi_css && (bio_associate_blkg(bio, tg_to_blkg(tg)) == -ENODEV))
-		bio_associate_blkg(bio, bio->bi_disk->queue->root_blkg);
-	bio_issue_init(&bio->bi_issue, bio_sectors(bio));
-#endif
-}
-
 bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg,
 		    struct bio *bio)
 {
 	struct throtl_qnode *qn = NULL;
-	struct throtl_grp *tg = blkg_to_tg(blkg ?: q->root_blkg);
+	struct throtl_grp *tg = blkg_to_tg(blkg);
 	struct throtl_service_queue *sq;
 	bool rw = bio_data_dir(bio);
 	bool throttled = false;
@@ -2159,7 +2138,6 @@ bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg,
 	if (unlikely(blk_queue_bypass(q)))
 		goto out_unlock;
 
-	blk_throtl_assoc_bio(tg, bio);
 	blk_throtl_update_idletime(tg);
 
 	sq = &tg->service_queue;

block/blk.h

@@ -4,6 +4,7 @@
 
 #include <linux/idr.h>
 #include <linux/blk-mq.h>
+#include <xen/xen.h>
 #include "blk-mq.h"
 
 /* Amount of time in which a process may batch requests */
@@ -124,7 +125,7 @@ static inline void __blk_get_queue(struct request_queue *q)
 }
 
 struct blk_flush_queue *blk_alloc_flush_queue(struct request_queue *q,
-		int node, int cmd_size);
+		int node, int cmd_size, gfp_t flags);
 void blk_free_flush_queue(struct blk_flush_queue *q);
 
 int blk_init_rl(struct request_list *rl, struct request_queue *q,
@@ -149,6 +150,41 @@ static inline void blk_queue_enter_live(struct request_queue *q)
 	percpu_ref_get(&q->q_usage_counter);
 }
 
+static inline bool biovec_phys_mergeable(struct request_queue *q,
+		struct bio_vec *vec1, struct bio_vec *vec2)
+{
+	unsigned long mask = queue_segment_boundary(q);
+	phys_addr_t addr1 = page_to_phys(vec1->bv_page) + vec1->bv_offset;
+	phys_addr_t addr2 = page_to_phys(vec2->bv_page) + vec2->bv_offset;
+
+	if (addr1 + vec1->bv_len != addr2)
+		return false;
+	if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2))
+		return false;
+	if ((addr1 | mask) != ((addr2 + vec2->bv_len - 1) | mask))
+		return false;
+	return true;
+}
+
+static inline bool __bvec_gap_to_prev(struct request_queue *q,
+		struct bio_vec *bprv, unsigned int offset)
+{
+	return offset ||
+		((bprv->bv_offset + bprv->bv_len) & queue_virt_boundary(q));
+}
+
+/*
+ * Check if adding a bio_vec after bprv with offset would create a gap in
+ * the SG list. Most drivers don't care about this, but some do.
+ */
+static inline bool bvec_gap_to_prev(struct request_queue *q,
+		struct bio_vec *bprv, unsigned int offset)
+{
+	if (!queue_virt_boundary(q))
+		return false;
+	return __bvec_gap_to_prev(q, bprv, offset);
+}
+
 #ifdef CONFIG_BLK_DEV_INTEGRITY
 void blk_flush_integrity(void);
 bool __bio_integrity_endio(struct bio *);
@@ -158,7 +194,38 @@ static inline bool bio_integrity_endio(struct bio *bio)
 		return __bio_integrity_endio(bio);
 	return true;
 }
-#else
+
+static inline bool integrity_req_gap_back_merge(struct request *req,
+		struct bio *next)
+{
+	struct bio_integrity_payload *bip = bio_integrity(req->bio);
+	struct bio_integrity_payload *bip_next = bio_integrity(next);
+
+	return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1],
+				bip_next->bip_vec[0].bv_offset);
+}
+
+static inline bool integrity_req_gap_front_merge(struct request *req,
+		struct bio *bio)
+{
+	struct bio_integrity_payload *bip = bio_integrity(bio);
+	struct bio_integrity_payload *bip_next = bio_integrity(req->bio);
+
+	return bvec_gap_to_prev(req->q, &bip->bip_vec[bip->bip_vcnt - 1],
+				bip_next->bip_vec[0].bv_offset);
+}
+#else /* CONFIG_BLK_DEV_INTEGRITY */
+static inline bool integrity_req_gap_back_merge(struct request *req,
+		struct bio *next)
+{
+	return false;
+}
+static inline bool integrity_req_gap_front_merge(struct request *req,
+		struct bio *bio)
+{
+	return false;
+}
+
 static inline void blk_flush_integrity(void)
 {
 }
@@ -166,7 +233,7 @@ static inline bool bio_integrity_endio(struct bio *bio)
 {
 	return true;
 }
-#endif
+#endif /* CONFIG_BLK_DEV_INTEGRITY */
 
 void blk_timeout_work(struct work_struct *work);
 unsigned long blk_rq_timeout(unsigned long timeout);

block/bounce.c

@@ -31,6 +31,24 @@
 static struct bio_set bounce_bio_set, bounce_bio_split;
 static mempool_t page_pool, isa_page_pool;
 
+static void init_bounce_bioset(void)
+{
+	static bool bounce_bs_setup;
+	int ret;
+
+	if (bounce_bs_setup)
+		return;
+
+	ret = bioset_init(&bounce_bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS);
+	BUG_ON(ret);
+	if (bioset_integrity_create(&bounce_bio_set, BIO_POOL_SIZE))
+		BUG_ON(1);
+
+	ret = bioset_init(&bounce_bio_split, BIO_POOL_SIZE, 0, 0);
+	BUG_ON(ret);
+	bounce_bs_setup = true;
+}
+
 #if defined(CONFIG_HIGHMEM)
 static __init int init_emergency_pool(void)
 {
@@ -44,14 +62,7 @@ static __init int init_emergency_pool(void)
 	BUG_ON(ret);
 	pr_info("pool size: %d pages\n", POOL_SIZE);
 
-	ret = bioset_init(&bounce_bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS);
-	BUG_ON(ret);
-	if (bioset_integrity_create(&bounce_bio_set, BIO_POOL_SIZE))
-		BUG_ON(1);
-
-	ret = bioset_init(&bounce_bio_split, BIO_POOL_SIZE, 0, 0);
-	BUG_ON(ret);
-
+	init_bounce_bioset();
 	return 0;
 }
 
@@ -86,6 +97,8 @@ static void *mempool_alloc_pages_isa(gfp_t gfp_mask, void *data)
 	return mempool_alloc_pages(gfp_mask | GFP_DMA, data);
 }
 
+static DEFINE_MUTEX(isa_mutex);
+
 /*
  * gets called "every" time someone init's a queue with BLK_BOUNCE_ISA
  * as the max address, so check if the pool has already been created.
@@ -94,14 +107,20 @@ int init_emergency_isa_pool(void)
 {
 	int ret;
 
-	if (mempool_initialized(&isa_page_pool))
+	mutex_lock(&isa_mutex);
+
+	if (mempool_initialized(&isa_page_pool)) {
+		mutex_unlock(&isa_mutex);
 		return 0;
+	}
 
 	ret = mempool_init(&isa_page_pool, ISA_POOL_SIZE, mempool_alloc_pages_isa,
 			   mempool_free_pages, (void *) 0);
 	BUG_ON(ret);
 
 	pr_info("isa pool size: %d pages\n", ISA_POOL_SIZE);
+	init_bounce_bioset();
+	mutex_unlock(&isa_mutex);
 	return 0;
 }
 
@@ -257,7 +276,9 @@ static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask,
 		}
 	}
 
-	bio_clone_blkcg_association(bio, bio_src);
+	bio_clone_blkg_association(bio, bio_src);
+
+	blkcg_bio_issue_init(bio);
 
 	return bio;
 }

block/cfq-iosched.c

@@ -1644,14 +1644,20 @@ static void cfq_pd_offline(struct blkg_policy_data *pd)
 	int i;
 
 	for (i = 0; i < IOPRIO_BE_NR; i++) {
-		if (cfqg->async_cfqq[0][i])
+		if (cfqg->async_cfqq[0][i]) {
 			cfq_put_queue(cfqg->async_cfqq[0][i]);
-		if (cfqg->async_cfqq[1][i])
+			cfqg->async_cfqq[0][i] = NULL;
+		}
+		if (cfqg->async_cfqq[1][i]) {
 			cfq_put_queue(cfqg->async_cfqq[1][i]);
+			cfqg->async_cfqq[1][i] = NULL;
+		}
 	}
 
-	if (cfqg->async_idle_cfqq)
+	if (cfqg->async_idle_cfqq) {
 		cfq_put_queue(cfqg->async_idle_cfqq);
+		cfqg->async_idle_cfqq = NULL;
+	}
 
 	/*
 	 * @blkg is going offline and will be ignored by
@@ -3753,7 +3759,7 @@ static void check_blkcg_changed(struct cfq_io_cq *cic, struct bio *bio)
 	uint64_t serial_nr;
 
 	rcu_read_lock();
-	serial_nr = bio_blkcg(bio)->css.serial_nr;
+	serial_nr = __bio_blkcg(bio)->css.serial_nr;
 	rcu_read_unlock();
 
 	/*
@@ -3818,7 +3824,7 @@ cfq_get_queue(struct cfq_data *cfqd, bool is_sync, struct cfq_io_cq *cic,
 	struct cfq_group *cfqg;
 
 	rcu_read_lock();
-	cfqg = cfq_lookup_cfqg(cfqd, bio_blkcg(bio));
+	cfqg = cfq_lookup_cfqg(cfqd, __bio_blkcg(bio));
 	if (!cfqg) {
 		cfqq = &cfqd->oom_cfqq;
 		goto out;

block/elevator.c

@@ -41,6 +41,7 @@
 
 #include "blk.h"
 #include "blk-mq-sched.h"
+#include "blk-pm.h"
 #include "blk-wbt.h"
 
 static DEFINE_SPINLOCK(elv_list_lock);
@@ -557,27 +558,6 @@ void elv_bio_merged(struct request_queue *q, struct request *rq,
 		e->type->ops.sq.elevator_bio_merged_fn(q, rq, bio);
 }
 
-#ifdef CONFIG_PM
-static void blk_pm_requeue_request(struct request *rq)
-{
-	if (rq->q->dev && !(rq->rq_flags & RQF_PM))
-		rq->q->nr_pending--;
-}
-
-static void blk_pm_add_request(struct request_queue *q, struct request *rq)
-{
-	if (q->dev && !(rq->rq_flags & RQF_PM) && q->nr_pending++ == 0 &&
-	    (q->rpm_status == RPM_SUSPENDED || q->rpm_status == RPM_SUSPENDING))
-		pm_request_resume(q->dev);
-}
-#else
-static inline void blk_pm_requeue_request(struct request *rq) {}
-static inline void blk_pm_add_request(struct request_queue *q,
-				      struct request *rq)
-{
-}
-#endif
-
 void elv_requeue_request(struct request_queue *q, struct request *rq)
 {
 	/*

block/genhd.c

@@ -567,7 +567,8 @@ static int exact_lock(dev_t devt, void *data)
 	return 0;
 }
 
-static void register_disk(struct device *parent, struct gendisk *disk)
+static void register_disk(struct device *parent, struct gendisk *disk,
+			  const struct attribute_group **groups)
 {
 	struct device *ddev = disk_to_dev(disk);
 	struct block_device *bdev;
@@ -582,6 +583,10 @@ static void register_disk(struct device *parent, struct gendisk *disk)
 	/* delay uevents, until we scanned partition table */
 	dev_set_uevent_suppress(ddev, 1);
 
+	if (groups) {
+		WARN_ON(ddev->groups);
+		ddev->groups = groups;
+	}
 	if (device_add(ddev))
 		return;
 	if (!sysfs_deprecated) {
@@ -647,6 +652,7 @@ exit:
  * __device_add_disk - add disk information to kernel list
  * @parent: parent device for the disk
  * @disk: per-device partitioning information
+ * @groups: Additional per-device sysfs groups
  * @register_queue: register the queue if set to true
  *
  * This function registers the partitioning information in @disk
@@ -655,6 +661,7 @@ exit:
  * FIXME: error handling
  */
 static void __device_add_disk(struct device *parent, struct gendisk *disk,
+			      const struct attribute_group **groups,
 			      bool register_queue)
 {
 	dev_t devt;
@@ -698,7 +705,7 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk,
 		blk_register_region(disk_devt(disk), disk->minors, NULL,
 				    exact_match, exact_lock, disk);
 	}
-	register_disk(parent, disk);
+	register_disk(parent, disk, groups);
 	if (register_queue)
 		blk_register_queue(disk);
 
@@ -712,15 +719,17 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk,
 	blk_integrity_add(disk);
 }
 
-void device_add_disk(struct device *parent, struct gendisk *disk)
+void device_add_disk(struct device *parent, struct gendisk *disk,
+		     const struct attribute_group **groups)
+
 {
-	__device_add_disk(parent, disk, true);
+	__device_add_disk(parent, disk, groups, true);
 }
 EXPORT_SYMBOL(device_add_disk);
 
 void device_add_disk_no_queue_reg(struct device *parent, struct gendisk *disk)
 {
-	__device_add_disk(parent, disk, false);
+	__device_add_disk(parent, disk, NULL, false);
 }
 EXPORT_SYMBOL(device_add_disk_no_queue_reg);
 

block/kyber-iosched.c

@@ -29,19 +29,30 @@
 #include "blk-mq-debugfs.h"
 #include "blk-mq-sched.h"
 #include "blk-mq-tag.h"
-#include "blk-stat.h"
 
-/* Scheduling domains. */
+#define CREATE_TRACE_POINTS
+#include <trace/events/kyber.h>
+
+/*
+ * Scheduling domains: the device is divided into multiple domains based on the
+ * request type.
+ */
 enum {
 	KYBER_READ,
-	KYBER_SYNC_WRITE,
-	KYBER_OTHER, /* Async writes, discard, etc. */
+	KYBER_WRITE,
+	KYBER_DISCARD,
+	KYBER_OTHER,
 	KYBER_NUM_DOMAINS,
 };
 
-enum {
-	KYBER_MIN_DEPTH = 256,
+static const char *kyber_domain_names[] = {
+	[KYBER_READ] = "READ",
+	[KYBER_WRITE] = "WRITE",
+	[KYBER_DISCARD] = "DISCARD",
+	[KYBER_OTHER] = "OTHER",
+};
 
+enum {
 	/*
 	 * In order to prevent starvation of synchronous requests by a flood of
 	 * asynchronous requests, we reserve 25% of requests for synchronous
@@ -51,25 +62,87 @@ enum {
 };
 
 /*
- * Initial device-wide depths for each scheduling domain.
+ * Maximum device-wide depth for each scheduling domain.
  *
- * Even for fast devices with lots of tags like NVMe, you can saturate
- * the device with only a fraction of the maximum possible queue depth.
- * So, we cap these to a reasonable value.
+ * Even for fast devices with lots of tags like NVMe, you can saturate the
+ * device with only a fraction of the maximum possible queue depth. So, we cap
+ * these to a reasonable value.
  */
 static const unsigned int kyber_depth[] = {
 	[KYBER_READ] = 256,
-	[KYBER_SYNC_WRITE] = 128,
-	[KYBER_OTHER] = 64,
+	[KYBER_WRITE] = 128,
+	[KYBER_DISCARD] = 64,
+	[KYBER_OTHER] = 16,
 };
 
 /*
- * Scheduling domain batch sizes. We favor reads.
+ * Default latency targets for each scheduling domain.
+ */
+static const u64 kyber_latency_targets[] = {
+	[KYBER_READ] = 2ULL * NSEC_PER_MSEC,
+	[KYBER_WRITE] = 10ULL * NSEC_PER_MSEC,
+	[KYBER_DISCARD] = 5ULL * NSEC_PER_SEC,
+};
+
+/*
+ * Batch size (number of requests we'll dispatch in a row) for each scheduling
+ * domain.
  */
 static const unsigned int kyber_batch_size[] = {
 	[KYBER_READ] = 16,
-	[KYBER_SYNC_WRITE] = 8,
-	[KYBER_OTHER] = 8,
+	[KYBER_WRITE] = 8,
+	[KYBER_DISCARD] = 1,
+	[KYBER_OTHER] = 1,
+};
+
+/*
+ * Requests latencies are recorded in a histogram with buckets defined relative
+ * to the target latency:
+ *
+ * <= 1/4 * target latency
+ * <= 1/2 * target latency
+ * <= 3/4 * target latency
+ * <= target latency
+ * <= 1 1/4 * target latency
+ * <= 1 1/2 * target latency
+ * <= 1 3/4 * target latency
+ * > 1 3/4 * target latency
+ */
+enum {
+	/*
+	 * The width of the latency histogram buckets is
+	 * 1 / (1 << KYBER_LATENCY_SHIFT) * target latency.
+	 */
+	KYBER_LATENCY_SHIFT = 2,
+	/*
+	 * The first (1 << KYBER_LATENCY_SHIFT) buckets are <= target latency,
+	 * thus, "good".
+	 */
+	KYBER_GOOD_BUCKETS = 1 << KYBER_LATENCY_SHIFT,
+	/* There are also (1 << KYBER_LATENCY_SHIFT) "bad" buckets. */
+	KYBER_LATENCY_BUCKETS = 2 << KYBER_LATENCY_SHIFT,
+};
+
+/*
+ * We measure both the total latency and the I/O latency (i.e., latency after
+ * submitting to the device).
+ */
+enum {
+	KYBER_TOTAL_LATENCY,
+	KYBER_IO_LATENCY,
+};
+
+static const char *kyber_latency_type_names[] = {
+	[KYBER_TOTAL_LATENCY] = "total",
+	[KYBER_IO_LATENCY] = "I/O",
+};
+
+/*
+ * Per-cpu latency histograms: total latency and I/O latency for each scheduling
+ * domain except for KYBER_OTHER.
+ */
+struct kyber_cpu_latency {
+	atomic_t buckets[KYBER_OTHER][2][KYBER_LATENCY_BUCKETS];
 };
 
 /*
@@ -88,12 +161,9 @@ struct kyber_ctx_queue {
 struct kyber_queue_data {
 	struct request_queue *q;
 
-	struct blk_stat_callback *cb;
-
 	/*
-	 * The device is divided into multiple scheduling domains based on the
-	 * request type. Each domain has a fixed number of in-flight requests of
-	 * that type device-wide, limited by these tokens.
+	 * Each scheduling domain has a limited number of in-flight requests
+	 * device-wide, limited by these tokens.
 	 */
 	struct sbitmap_queue domain_tokens[KYBER_NUM_DOMAINS];
 
@@ -103,8 +173,19 @@ struct kyber_queue_data {
 	 */
 	unsigned int async_depth;
 
+	struct kyber_cpu_latency __percpu *cpu_latency;
+
+	/* Timer for stats aggregation and adjusting domain tokens. */
+	struct timer_list timer;
+
+	unsigned int latency_buckets[KYBER_OTHER][2][KYBER_LATENCY_BUCKETS];
+
+	unsigned long latency_timeout[KYBER_OTHER];
+
+	int domain_p99[KYBER_OTHER];
+
 	/* Target latencies in nanoseconds. */
-	u64 read_lat_nsec, write_lat_nsec;
+	u64 latency_targets[KYBER_OTHER];
 };
 
 struct kyber_hctx_data {
@@ -124,233 +205,219 @@ static int kyber_domain_wake(wait_queue_entry_t *wait, unsigned mode, int flags,
 
 static unsigned int kyber_sched_domain(unsigned int op)
 {
-	if ((op & REQ_OP_MASK) == REQ_OP_READ)
+	switch (op & REQ_OP_MASK) {
+	case REQ_OP_READ:
 		return KYBER_READ;
-	else if ((op & REQ_OP_MASK) == REQ_OP_WRITE && op_is_sync(op))
-		return KYBER_SYNC_WRITE;
-	else
+	case REQ_OP_WRITE:
+		return KYBER_WRITE;
+	case REQ_OP_DISCARD:
+		return KYBER_DISCARD;
+	default:
 		return KYBER_OTHER;
+	}
 }
 
-enum {
-	NONE = 0,
-	GOOD = 1,
-	GREAT = 2,
-	BAD = -1,
-	AWFUL = -2,
-};
-
-#define IS_GOOD(status) ((status) > 0)
-#define IS_BAD(status) ((status) < 0)
-
-static int kyber_lat_status(struct blk_stat_callback *cb,
-			    unsigned int sched_domain, u64 target)
+static void flush_latency_buckets(struct kyber_queue_data *kqd,
+				  struct kyber_cpu_latency *cpu_latency,
+				  unsigned int sched_domain, unsigned int type)
 {
-	u64 latency;
-
-	if (!cb->stat[sched_domain].nr_samples)
-		return NONE;
+	unsigned int *buckets = kqd->latency_buckets[sched_domain][type];
+	atomic_t *cpu_buckets = cpu_latency->buckets[sched_domain][type];
+	unsigned int bucket;
 
-	latency = cb->stat[sched_domain].mean;
-	if (latency >= 2 * target)
-		return AWFUL;
-	else if (latency > target)
-		return BAD;
-	else if (latency <= target / 2)
-		return GREAT;
-	else /* (latency <= target) */
-		return GOOD;
+	for (bucket = 0; bucket < KYBER_LATENCY_BUCKETS; bucket++)
+		buckets[bucket] += atomic_xchg(&cpu_buckets[bucket], 0);
 }
 
 /*
- * Adjust the read or synchronous write depth given the status of reads and
- * writes. The goal is that the latencies of the two domains are fair (i.e., if
- * one is good, then the other is good).
+ * Calculate the histogram bucket with the given percentile rank, or -1 if there
+ * aren't enough samples yet.
  */
-static void kyber_adjust_rw_depth(struct kyber_queue_data *kqd,
-				  unsigned int sched_domain, int this_status,
-				  int other_status)
+static int calculate_percentile(struct kyber_queue_data *kqd,
+				unsigned int sched_domain, unsigned int type,
+				unsigned int percentile)
 {
-	unsigned int orig_depth, depth;
+	unsigned int *buckets = kqd->latency_buckets[sched_domain][type];
+	unsigned int bucket, samples = 0, percentile_samples;
+
+	for (bucket = 0; bucket < KYBER_LATENCY_BUCKETS; bucket++)
+		samples += buckets[bucket];
+
+	if (!samples)
+		return -1;
 
 	/*
-	 * If this domain had no samples, or reads and writes are both good or
-	 * both bad, don't adjust the depth.
+	 * We do the calculation once we have 500 samples or one second passes
+	 * since the first sample was recorded, whichever comes first.
 	 */
-	if (this_status == NONE ||
-	    (IS_GOOD(this_status) && IS_GOOD(other_status)) ||
-	    (IS_BAD(this_status) && IS_BAD(other_status)))
-		return;
-
-	orig_depth = depth = kqd->domain_tokens[sched_domain].sb.depth;
+	if (!kqd->latency_timeout[sched_domain])
+		kqd->latency_timeout[sched_domain] = max(jiffies + HZ, 1UL);
+	if (samples < 500 &&
+	    time_is_after_jiffies(kqd->latency_timeout[sched_domain])) {
+		return -1;
+	}
+	kqd->latency_timeout[sched_domain] = 0;
 
-	if (other_status == NONE) {
-		depth++;
-	} else {
-		switch (this_status) {
-		case GOOD:
-			if (other_status == AWFUL)
-				depth -= max(depth / 4, 1U);
-			else
-				depth -= max(depth / 8, 1U);
-			break;
-		case GREAT:
-			if (other_status == AWFUL)
-				depth /= 2;
-			else
-				depth -= max(depth / 4, 1U);
+	percentile_samples = DIV_ROUND_UP(samples * percentile, 100);
+	for (bucket = 0; bucket < KYBER_LATENCY_BUCKETS - 1; bucket++) {
+		if (buckets[bucket] >= percentile_samples)
 			break;
-		case BAD:
-			depth++;
-			break;
-		case AWFUL:
-			if (other_status == GREAT)
-				depth += 2;
-			else
-				depth++;
-			break;
-		}
+		percentile_samples -= buckets[bucket];
 	}
+	memset(buckets, 0, sizeof(kqd->latency_buckets[sched_domain][type]));
 
-	depth = clamp(depth, 1U, kyber_depth[sched_domain]);
-	if (depth != orig_depth)
-		sbitmap_queue_resize(&kqd->domain_tokens[sched_domain], depth);
+	trace_kyber_latency(kqd->q, kyber_domain_names[sched_domain],
+			    kyber_latency_type_names[type], percentile,
+			    bucket + 1, 1 << KYBER_LATENCY_SHIFT, samples);
+
+	return bucket;
 }
 
-/*
- * Adjust the depth of other requests given the status of reads and synchronous
- * writes. As long as either domain is doing fine, we don't throttle, but if
- * both domains are doing badly, we throttle heavily.
- */
-static void kyber_adjust_other_depth(struct kyber_queue_data *kqd,
-				     int read_status, int write_status,
-				     bool have_samples)
-{
-	unsigned int orig_depth, depth;
-	int status;
-
-	orig_depth = depth = kqd->domain_tokens[KYBER_OTHER].sb.depth;
-
-	if (read_status == NONE && write_status == NONE) {
-		depth += 2;
-	} else if (have_samples) {
-		if (read_status == NONE)
-			status = write_status;
-		else if (write_status == NONE)
-			status = read_status;
-		else
-			status = max(read_status, write_status);
-		switch (status) {
-		case GREAT:
-			depth += 2;
-			break;
-		case GOOD:
-			depth++;
-			break;
-		case BAD:
-			depth -= max(depth / 4, 1U);
-			break;
-		case AWFUL:
-			depth /= 2;
-			break;
-		}
+static void kyber_resize_domain(struct kyber_queue_data *kqd,
+				unsigned int sched_domain, unsigned int depth)
+{
+	depth = clamp(depth, 1U, kyber_depth[sched_domain]);
+	if (depth != kqd->domain_tokens[sched_domain].sb.depth) {
+		sbitmap_queue_resize(&kqd->domain_tokens[sched_domain], depth);
+		trace_kyber_adjust(kqd->q, kyber_domain_names[sched_domain],
+				   depth);
 	}
-
-	depth = clamp(depth, 1U, kyber_depth[KYBER_OTHER]);
-	if (depth != orig_depth)
-		sbitmap_queue_resize(&kqd->domain_tokens[KYBER_OTHER], depth);
 }
 
-/*
- * Apply heuristics for limiting queue depths based on gathered latency
- * statistics.
- */
-static void kyber_stat_timer_fn(struct blk_stat_callback *cb)
+static void kyber_timer_fn(struct timer_list *t)
 {
-	struct kyber_queue_data *kqd = cb->data;
-	int read_status, write_status;
+	struct kyber_queue_data *kqd = from_timer(kqd, t, timer);
+	unsigned int sched_domain;
+	int cpu;
+	bool bad = false;
+
+	/* Sum all of the per-cpu latency histograms. */
+	for_each_online_cpu(cpu) {
+		struct kyber_cpu_latency *cpu_latency;
+
+		cpu_latency = per_cpu_ptr(kqd->cpu_latency, cpu);
+		for (sched_domain = 0; sched_domain < KYBER_OTHER; sched_domain++) {
+			flush_latency_buckets(kqd, cpu_latency, sched_domain,
+					      KYBER_TOTAL_LATENCY);
+			flush_latency_buckets(kqd, cpu_latency, sched_domain,
+					      KYBER_IO_LATENCY);
+		}
+	}
 
-	read_status = kyber_lat_status(cb, KYBER_READ, kqd->read_lat_nsec);
-	write_status = kyber_lat_status(cb, KYBER_SYNC_WRITE, kqd->write_lat_nsec);
+	/*
+	 * Check if any domains have a high I/O latency, which might indicate
+	 * congestion in the device. Note that we use the p90; we don't want to
+	 * be too sensitive to outliers here.
+	 */
+	for (sched_domain = 0; sched_domain < KYBER_OTHER; sched_domain++) {
+		int p90;
 
-	kyber_adjust_rw_depth(kqd, KYBER_READ, read_status, write_status);
-	kyber_adjust_rw_depth(kqd, KYBER_SYNC_WRITE, write_status, read_status);
-	kyber_adjust_other_depth(kqd, read_status, write_status,
-				 cb->stat[KYBER_OTHER].nr_samples != 0);
+		p90 = calculate_percentile(kqd, sched_domain, KYBER_IO_LATENCY,
+					   90);
+		if (p90 >= KYBER_GOOD_BUCKETS)
+			bad = true;
+	}
 
 	/*
-	 * Continue monitoring latencies if we aren't hitting the targets or
-	 * we're still throttling other requests.
+	 * Adjust the scheduling domain depths. If we determined that there was
+	 * congestion, we throttle all domains with good latencies. Either way,
+	 * we ease up on throttling domains with bad latencies.
 	 */
-	if (!blk_stat_is_active(kqd->cb) &&
-	    ((IS_BAD(read_status) || IS_BAD(write_status) ||
-	      kqd->domain_tokens[KYBER_OTHER].sb.depth < kyber_depth[KYBER_OTHER])))
-		blk_stat_activate_msecs(kqd->cb, 100);
+	for (sched_domain = 0; sched_domain < KYBER_OTHER; sched_domain++) {
+		unsigned int orig_depth, depth;
+		int p99;
+
+		p99 = calculate_percentile(kqd, sched_domain,
+					   KYBER_TOTAL_LATENCY, 99);
+		/*
+		 * This is kind of subtle: different domains will not
+		 * necessarily have enough samples to calculate the latency
+		 * percentiles during the same window, so we have to remember
+		 * the p99 for the next time we observe congestion; once we do,
+		 * we don't want to throttle again until we get more data, so we
+		 * reset it to -1.
+		 */
+		if (bad) {
+			if (p99 < 0)
+				p99 = kqd->domain_p99[sched_domain];
+			kqd->domain_p99[sched_domain] = -1;
+		} else if (p99 >= 0) {
+			kqd->domain_p99[sched_domain] = p99;
+		}
+		if (p99 < 0)
+			continue;
+
+		/*
+		 * If this domain has bad latency, throttle less. Otherwise,
+		 * throttle more iff we determined that there is congestion.
+		 *
+		 * The new depth is scaled linearly with the p99 latency vs the
+		 * latency target. E.g., if the p99 is 3/4 of the target, then
+		 * we throttle down to 3/4 of the current depth, and if the p99
+		 * is 2x the target, then we double the depth.
+		 */
+		if (bad || p99 >= KYBER_GOOD_BUCKETS) {
+			orig_depth = kqd->domain_tokens[sched_domain].sb.depth;
+			depth = (orig_depth * (p99 + 1)) >> KYBER_LATENCY_SHIFT;
+			kyber_resize_domain(kqd, sched_domain, depth);
+		}
+	}
 }
 
-static unsigned int kyber_sched_tags_shift(struct kyber_queue_data *kqd)
+static unsigned int kyber_sched_tags_shift(struct request_queue *q)
 {
 	/*
 	 * All of the hardware queues have the same depth, so we can just grab
 	 * the shift of the first one.
 	 */
-	return kqd->q->queue_hw_ctx[0]->sched_tags->bitmap_tags.sb.shift;
-}
-
-static int kyber_bucket_fn(const struct request *rq)
-{
-	return kyber_sched_domain(rq->cmd_flags);
+	return q->queue_hw_ctx[0]->sched_tags->bitmap_tags.sb.shift;
 }
 
 static struct kyber_queue_data *kyber_queue_data_alloc(struct request_queue *q)
 {
 	struct kyber_queue_data *kqd;
-	unsigned int max_tokens;
 	unsigned int shift;
 	int ret = -ENOMEM;
 	int i;
 
-	kqd = kmalloc_node(sizeof(*kqd), GFP_KERNEL, q->node);
+	kqd = kzalloc_node(sizeof(*kqd), GFP_KERNEL, q->node);
 	if (!kqd)
 		goto err;
+
 	kqd->q = q;
 
-	kqd->cb = blk_stat_alloc_callback(kyber_stat_timer_fn, kyber_bucket_fn,
-					  KYBER_NUM_DOMAINS, kqd);
-	if (!kqd->cb)
+	kqd->cpu_latency = alloc_percpu_gfp(struct kyber_cpu_latency,
+					    GFP_KERNEL | __GFP_ZERO);
+	if (!kqd->cpu_latency)
 		goto err_kqd;
 
-	/*
-	 * The maximum number of tokens for any scheduling domain is at least
-	 * the queue depth of a single hardware queue. If the hardware doesn't
-	 * have many tags, still provide a reasonable number.
-	 */
-	max_tokens = max_t(unsigned int, q->tag_set->queue_depth,
-			   KYBER_MIN_DEPTH);
+	timer_setup(&kqd->timer, kyber_timer_fn, 0);
+
 	for (i = 0; i < KYBER_NUM_DOMAINS; i++) {
 		WARN_ON(!kyber_depth[i]);
 		WARN_ON(!kyber_batch_size[i]);
 		ret = sbitmap_queue_init_node(&kqd->domain_tokens[i],
-					      max_tokens, -1, false, GFP_KERNEL,
-					      q->node);
+					      kyber_depth[i], -1, false,
+					      GFP_KERNEL, q->node);
 		if (ret) {
 			while (--i >= 0)
 				sbitmap_queue_free(&kqd->domain_tokens[i]);
-			goto err_cb;
+			goto err_buckets;
 		}
-		sbitmap_queue_resize(&kqd->domain_tokens[i], kyber_depth[i]);
 	}
 
-	shift = kyber_sched_tags_shift(kqd);
-	kqd->async_depth = (1U << shift) * KYBER_ASYNC_PERCENT / 100U;
+	for (i = 0; i < KYBER_OTHER; i++) {
+		kqd->domain_p99[i] = -1;
+		kqd->latency_targets[i] = kyber_latency_targets[i];
+	}
 
-	kqd->read_lat_nsec = 2000000ULL;
-	kqd->write_lat_nsec = 10000000ULL;
+	shift = kyber_sched_tags_shift(q);
+	kqd->async_depth = (1U << shift) * KYBER_ASYNC_PERCENT / 100U;
 
 	return kqd;
 
-err_cb:
-	blk_stat_free_callback(kqd->cb);
+err_buckets:
+	free_percpu(kqd->cpu_latency);
 err_kqd:
 	kfree(kqd);
 err:
@@ -372,25 +439,24 @@ static int kyber_init_sched(struct request_queue *q, struct elevator_type *e)
 		return PTR_ERR(kqd);
 	}
 
+	blk_stat_enable_accounting(q);
+
 	eq->elevator_data = kqd;
 	q->elevator = eq;
 
-	blk_stat_add_callback(q, kqd->cb);
-
 	return 0;
 }
 
 static void kyber_exit_sched(struct elevator_queue *e)
 {
 	struct kyber_queue_data *kqd = e->elevator_data;
-	struct request_queue *q = kqd->q;
 	int i;
 
-	blk_stat_remove_callback(q, kqd->cb);
+	del_timer_sync(&kqd->timer);
 
 	for (i = 0; i < KYBER_NUM_DOMAINS; i++)
 		sbitmap_queue_free(&kqd->domain_tokens[i]);
-	blk_stat_free_callback(kqd->cb);
+	free_percpu(kqd->cpu_latency);
 	kfree(kqd);
 }
 
@@ -558,41 +624,44 @@ static void kyber_finish_request(struct request *rq)
 	rq_clear_domain_token(kqd, rq);
 }
 
-static void kyber_completed_request(struct request *rq)
+static void add_latency_sample(struct kyber_cpu_latency *cpu_latency,
+			       unsigned int sched_domain, unsigned int type,
+			       u64 target, u64 latency)
 {
-	struct request_queue *q = rq->q;
-	struct kyber_queue_data *kqd = q->elevator->elevator_data;
-	unsigned int sched_domain;
-	u64 now, latency, target;
+	unsigned int bucket;
+	u64 divisor;
 
-	/*
-	 * Check if this request met our latency goal. If not, quickly gather
-	 * some statistics and start throttling.
-	 */
-	sched_domain = kyber_sched_domain(rq->cmd_flags);
-	switch (sched_domain) {
-	case KYBER_READ:
-		target = kqd->read_lat_nsec;
-		break;
-	case KYBER_SYNC_WRITE:
-		target = kqd->write_lat_nsec;
-		break;
-	default:
-		return;
+	if (latency > 0) {
+		divisor = max_t(u64, target >> KYBER_LATENCY_SHIFT, 1);
+		bucket = min_t(unsigned int, div64_u64(latency - 1, divisor),
+			       KYBER_LATENCY_BUCKETS - 1);
+	} else {
+		bucket = 0;
 	}
 
-	/* If we are already monitoring latencies, don't check again. */
-	if (blk_stat_is_active(kqd->cb))
-		return;
+	atomic_inc(&cpu_latency->buckets[sched_domain][type][bucket]);
+}
 
-	now = ktime_get_ns();
-	if (now < rq->io_start_time_ns)
+static void kyber_completed_request(struct request *rq, u64 now)
+{
+	struct kyber_queue_data *kqd = rq->q->elevator->elevator_data;
+	struct kyber_cpu_latency *cpu_latency;
+	unsigned int sched_domain;
+	u64 target;
+
+	sched_domain = kyber_sched_domain(rq->cmd_flags);
+	if (sched_domain == KYBER_OTHER)
 		return;
 
-	latency = now - rq->io_start_time_ns;
+	cpu_latency = get_cpu_ptr(kqd->cpu_latency);
+	target = kqd->latency_targets[sched_domain];
+	add_latency_sample(cpu_latency, sched_domain, KYBER_TOTAL_LATENCY,
+			   target, now - rq->start_time_ns);
+	add_latency_sample(cpu_latency, sched_domain, KYBER_IO_LATENCY, target,
+			   now - rq->io_start_time_ns);
+	put_cpu_ptr(kqd->cpu_latency);
 
-	if (latency > target)
-		blk_stat_activate_msecs(kqd->cb, 10);
+	timer_reduce(&kqd->timer, jiffies + HZ / 10);
 }
 
 struct flush_kcq_data {
@@ -713,6 +782,9 @@ kyber_dispatch_cur_domain(struct kyber_queue_data *kqd,
 			rq_set_domain_token(rq, nr);
 			list_del_init(&rq->queuelist);
 			return rq;
+		} else {
+			trace_kyber_throttled(kqd->q,
+					      kyber_domain_names[khd->cur_domain]);
 		}
 	} else if (sbitmap_any_bit_set(&khd->kcq_map[khd->cur_domain])) {
 		nr = kyber_get_domain_token(kqd, khd, hctx);
@@ -723,6 +795,9 @@ kyber_dispatch_cur_domain(struct kyber_queue_data *kqd,
 			rq_set_domain_token(rq, nr);
 			list_del_init(&rq->queuelist);
 			return rq;
+		} else {
+			trace_kyber_throttled(kqd->q,
+					      kyber_domain_names[khd->cur_domain]);
 		}
 	}
 
@@ -790,17 +865,17 @@ static bool kyber_has_work(struct blk_mq_hw_ctx *hctx)
 	return false;
 }
 
-#define KYBER_LAT_SHOW_STORE(op)					\
-static ssize_t kyber_##op##_lat_show(struct elevator_queue *e,		\
-				     char *page)			\
+#define KYBER_LAT_SHOW_STORE(domain, name)				\
+static ssize_t kyber_##name##_lat_show(struct elevator_queue *e,	\
+				       char *page)			\
 {									\
 	struct kyber_queue_data *kqd = e->elevator_data;		\
 									\
-	return sprintf(page, "%llu\n", kqd->op##_lat_nsec);		\
+	return sprintf(page, "%llu\n", kqd->latency_targets[domain]);	\
 }									\
 									\
-static ssize_t kyber_##op##_lat_store(struct elevator_queue *e,		\
-				      const char *page, size_t count)	\
+static ssize_t kyber_##name##_lat_store(struct elevator_queue *e,	\
+					const char *page, size_t count)	\
 {									\
 	struct kyber_queue_data *kqd = e->elevator_data;		\
 	unsigned long long nsec;					\
@@ -810,12 +885,12 @@ static ssize_t kyber_##op##_lat_store(struct elevator_queue *e,		\
 	if (ret)							\
 		return ret;						\
 									\
-	kqd->op##_lat_nsec = nsec;					\
+	kqd->latency_targets[domain] = nsec;				\
 									\
 	return count;							\
 }
-KYBER_LAT_SHOW_STORE(read);
-KYBER_LAT_SHOW_STORE(write);
+KYBER_LAT_SHOW_STORE(KYBER_READ, read);
+KYBER_LAT_SHOW_STORE(KYBER_WRITE, write);
 #undef KYBER_LAT_SHOW_STORE
 
 #define KYBER_LAT_ATTR(op) __ATTR(op##_lat_nsec, 0644, kyber_##op##_lat_show, kyber_##op##_lat_store)
@@ -882,7 +957,8 @@ static int kyber_##name##_waiting_show(void *data, struct seq_file *m)	\
 	return 0;							\
 }
 KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_READ, read)
-KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_SYNC_WRITE, sync_write)
+KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_WRITE, write)
+KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_DISCARD, discard)
 KYBER_DEBUGFS_DOMAIN_ATTRS(KYBER_OTHER, other)
 #undef KYBER_DEBUGFS_DOMAIN_ATTRS
 
@@ -900,20 +976,7 @@ static int kyber_cur_domain_show(void *data, struct seq_file *m)
 	struct blk_mq_hw_ctx *hctx = data;
 	struct kyber_hctx_data *khd = hctx->sched_data;
 
-	switch (khd->cur_domain) {
-	case KYBER_READ:
-		seq_puts(m, "READ\n");
-		break;
-	case KYBER_SYNC_WRITE:
-		seq_puts(m, "SYNC_WRITE\n");
-		break;
-	case KYBER_OTHER:
-		seq_puts(m, "OTHER\n");
-		break;
-	default:
-		seq_printf(m, "%u\n", khd->cur_domain);
-		break;
-	}
+	seq_printf(m, "%s\n", kyber_domain_names[khd->cur_domain]);
 	return 0;
 }
 
@@ -930,7 +993,8 @@ static int kyber_batching_show(void *data, struct seq_file *m)
 	{#name "_tokens", 0400, kyber_##name##_tokens_show}
 static const struct blk_mq_debugfs_attr kyber_queue_debugfs_attrs[] = {
 	KYBER_QUEUE_DOMAIN_ATTRS(read),
-	KYBER_QUEUE_DOMAIN_ATTRS(sync_write),
+	KYBER_QUEUE_DOMAIN_ATTRS(write),
+	KYBER_QUEUE_DOMAIN_ATTRS(discard),
 	KYBER_QUEUE_DOMAIN_ATTRS(other),
 	{"async_depth", 0400, kyber_async_depth_show},
 	{},
@@ -942,7 +1006,8 @@ static const struct blk_mq_debugfs_attr kyber_queue_debugfs_attrs[] = {
 	{#name "_waiting", 0400, kyber_##name##_waiting_show}
 static const struct blk_mq_debugfs_attr kyber_hctx_debugfs_attrs[] = {
 	KYBER_HCTX_DOMAIN_ATTRS(read),
-	KYBER_HCTX_DOMAIN_ATTRS(sync_write),
+	KYBER_HCTX_DOMAIN_ATTRS(write),
+	KYBER_HCTX_DOMAIN_ATTRS(discard),
 	KYBER_HCTX_DOMAIN_ATTRS(other),
 	{"cur_domain", 0400, kyber_cur_domain_show},
 	{"batching", 0400, kyber_batching_show},

drivers/block/DAC960.c

@@ -1,7229 +0,0 @@
-/*
-
-  Linux Driver for Mylex DAC960/AcceleRAID/eXtremeRAID PCI RAID Controllers
-
-  Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
-  Portions Copyright 2002 by Mylex (An IBM Business Unit)
-
-  This program is free software; you may redistribute and/or modify it under
-  the terms of the GNU General Public License Version 2 as published by the
-  Free Software Foundation.
-
-  This program is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
-  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-  for complete details.
-
-*/
-
-
-#define DAC960_DriverVersion			"2.5.49"
-#define DAC960_DriverDate			"21 Aug 2007"
-
-
-#include <linux/compiler.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/blkdev.h>
-#include <linux/bio.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/genhd.h>
-#include <linux/hdreg.h>
-#include <linux/blkpg.h>
-#include <linux/dma-mapping.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/reboot.h>
-#include <linux/spinlock.h>
-#include <linux/timer.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/jiffies.h>
-#include <linux/random.h>
-#include <linux/scatterlist.h>
-#include <asm/io.h>
-#include <linux/uaccess.h>
-#include "DAC960.h"
-
-#define DAC960_GAM_MINOR	252
-
-
-static DEFINE_MUTEX(DAC960_mutex);
-static DAC960_Controller_T *DAC960_Controllers[DAC960_MaxControllers];
-static int DAC960_ControllerCount;
-static struct proc_dir_entry *DAC960_ProcDirectoryEntry;
-
-static long disk_size(DAC960_Controller_T *p, int drive_nr)
-{
-	if (p->FirmwareType == DAC960_V1_Controller) {
-		if (drive_nr >= p->LogicalDriveCount)
-			return 0;
-		return p->V1.LogicalDriveInformation[drive_nr].
-			LogicalDriveSize;
-	} else {
-		DAC960_V2_LogicalDeviceInfo_T *i =
-			p->V2.LogicalDeviceInformation[drive_nr];
-		if (i == NULL)
-			return 0;
-		return i->ConfigurableDeviceSize;
-	}
-}
-
-static int DAC960_open(struct block_device *bdev, fmode_t mode)
-{
-	struct gendisk *disk = bdev->bd_disk;
-	DAC960_Controller_T *p = disk->queue->queuedata;
-	int drive_nr = (long)disk->private_data;
-	int ret = -ENXIO;
-
-	mutex_lock(&DAC960_mutex);
-	if (p->FirmwareType == DAC960_V1_Controller) {
-		if (p->V1.LogicalDriveInformation[drive_nr].
-		    LogicalDriveState == DAC960_V1_LogicalDrive_Offline)
-			goto out;
-	} else {
-		DAC960_V2_LogicalDeviceInfo_T *i =
-			p->V2.LogicalDeviceInformation[drive_nr];
-		if (!i || i->LogicalDeviceState == DAC960_V2_LogicalDevice_Offline)
-			goto out;
-	}
-
-	check_disk_change(bdev);
-
-	if (!get_capacity(p->disks[drive_nr]))
-		goto out;
-	ret = 0;
-out:
-	mutex_unlock(&DAC960_mutex);
-	return ret;
-}
-
-static int DAC960_getgeo(struct block_device *bdev, struct hd_geometry *geo)
-{
-	struct gendisk *disk = bdev->bd_disk;
-	DAC960_Controller_T *p = disk->queue->queuedata;
-	int drive_nr = (long)disk->private_data;
-
-	if (p->FirmwareType == DAC960_V1_Controller) {
-		geo->heads = p->V1.GeometryTranslationHeads;
-		geo->sectors = p->V1.GeometryTranslationSectors;
-		geo->cylinders = p->V1.LogicalDriveInformation[drive_nr].
-			LogicalDriveSize / (geo->heads * geo->sectors);
-	} else {
-		DAC960_V2_LogicalDeviceInfo_T *i =
-			p->V2.LogicalDeviceInformation[drive_nr];
-		switch (i->DriveGeometry) {
-		case DAC960_V2_Geometry_128_32:
-			geo->heads = 128;
-			geo->sectors = 32;
-			break;
-		case DAC960_V2_Geometry_255_63:
-			geo->heads = 255;
-			geo->sectors = 63;
-			break;
-		default:
-			DAC960_Error("Illegal Logical Device Geometry %d\n",
-					p, i->DriveGeometry);
-			return -EINVAL;
-		}
-
-		geo->cylinders = i->ConfigurableDeviceSize /
-			(geo->heads * geo->sectors);
-	}
-	
-	return 0;
-}
-
-static unsigned int DAC960_check_events(struct gendisk *disk,
-					unsigned int clearing)
-{
-	DAC960_Controller_T *p = disk->queue->queuedata;
-	int drive_nr = (long)disk->private_data;
-
-	if (!p->LogicalDriveInitiallyAccessible[drive_nr])
-		return DISK_EVENT_MEDIA_CHANGE;
-	return 0;
-}
-
-static int DAC960_revalidate_disk(struct gendisk *disk)
-{
-	DAC960_Controller_T *p = disk->queue->queuedata;
-	int unit = (long)disk->private_data;
-
-	set_capacity(disk, disk_size(p, unit));
-	return 0;
-}
-
-static const struct block_device_operations DAC960_BlockDeviceOperations = {
-	.owner			= THIS_MODULE,
-	.open			= DAC960_open,
-	.getgeo			= DAC960_getgeo,
-	.check_events		= DAC960_check_events,
-	.revalidate_disk	= DAC960_revalidate_disk,
-};
-
-
-/*
-  DAC960_AnnounceDriver announces the Driver Version and Date, Author's Name,
-  Copyright Notice, and Electronic Mail Address.
-*/
-
-static void DAC960_AnnounceDriver(DAC960_Controller_T *Controller)
-{
-  DAC960_Announce("***** DAC960 RAID Driver Version "
-		  DAC960_DriverVersion " of "
-		  DAC960_DriverDate " *****\n", Controller);
-  DAC960_Announce("Copyright 1998-2001 by Leonard N. Zubkoff "
-		  "<lnz@dandelion.com>\n", Controller);
-}
-
-
-/*
-  DAC960_Failure prints a standardized error message, and then returns false.
-*/
-
-static bool DAC960_Failure(DAC960_Controller_T *Controller,
-			      unsigned char *ErrorMessage)
-{
-  DAC960_Error("While configuring DAC960 PCI RAID Controller at\n",
-	       Controller);
-  if (Controller->IO_Address == 0)
-    DAC960_Error("PCI Bus %d Device %d Function %d I/O Address N/A "
-		 "PCI Address 0x%X\n", Controller,
-		 Controller->Bus, Controller->Device,
-		 Controller->Function, Controller->PCI_Address);
-  else DAC960_Error("PCI Bus %d Device %d Function %d I/O Address "
-		    "0x%X PCI Address 0x%X\n", Controller,
-		    Controller->Bus, Controller->Device,
-		    Controller->Function, Controller->IO_Address,
-		    Controller->PCI_Address);
-  DAC960_Error("%s FAILED - DETACHING\n", Controller, ErrorMessage);
-  return false;
-}
-
-/*
-  init_dma_loaf() and slice_dma_loaf() are helper functions for
-  aggregating the dma-mapped memory for a well-known collection of
-  data structures that are of different lengths.
-
-  These routines don't guarantee any alignment.  The caller must
-  include any space needed for alignment in the sizes of the structures
-  that are passed in.
- */
-
-static bool init_dma_loaf(struct pci_dev *dev, struct dma_loaf *loaf,
-								 size_t len)
-{
-	void *cpu_addr;
-	dma_addr_t dma_handle;
-
-	cpu_addr = pci_alloc_consistent(dev, len, &dma_handle);
-	if (cpu_addr == NULL)
-		return false;
-	
-	loaf->cpu_free = loaf->cpu_base = cpu_addr;
-	loaf->dma_free =loaf->dma_base = dma_handle;
-	loaf->length = len;
-	memset(cpu_addr, 0, len);
-	return true;
-}
-
-static void *slice_dma_loaf(struct dma_loaf *loaf, size_t len,
-					dma_addr_t *dma_handle)
-{
-	void *cpu_end = loaf->cpu_free + len;
-	void *cpu_addr = loaf->cpu_free;
-
-	BUG_ON(cpu_end > loaf->cpu_base + loaf->length);
-	*dma_handle = loaf->dma_free;
-	loaf->cpu_free = cpu_end;
-	loaf->dma_free += len;
-	return cpu_addr;
-}
-
-static void free_dma_loaf(struct pci_dev *dev, struct dma_loaf *loaf_handle)
-{
-	if (loaf_handle->cpu_base != NULL)
-		pci_free_consistent(dev, loaf_handle->length,
-			loaf_handle->cpu_base, loaf_handle->dma_base);
-}
-
-
-/*
-  DAC960_CreateAuxiliaryStructures allocates and initializes the auxiliary
-  data structures for Controller.  It returns true on success and false on
-  failure.
-*/
-
-static bool DAC960_CreateAuxiliaryStructures(DAC960_Controller_T *Controller)
-{
-  int CommandAllocationLength, CommandAllocationGroupSize;
-  int CommandsRemaining = 0, CommandIdentifier, CommandGroupByteCount;
-  void *AllocationPointer = NULL;
-  void *ScatterGatherCPU = NULL;
-  dma_addr_t ScatterGatherDMA;
-  struct dma_pool *ScatterGatherPool;
-  void *RequestSenseCPU = NULL;
-  dma_addr_t RequestSenseDMA;
-  struct dma_pool *RequestSensePool = NULL;
-
-  if (Controller->FirmwareType == DAC960_V1_Controller)
-    {
-      CommandAllocationLength = offsetof(DAC960_Command_T, V1.EndMarker);
-      CommandAllocationGroupSize = DAC960_V1_CommandAllocationGroupSize;
-      ScatterGatherPool = dma_pool_create("DAC960_V1_ScatterGather",
-		&Controller->PCIDevice->dev,
-	DAC960_V1_ScatterGatherLimit * sizeof(DAC960_V1_ScatterGatherSegment_T),
-	sizeof(DAC960_V1_ScatterGatherSegment_T), 0);
-      if (ScatterGatherPool == NULL)
-	    return DAC960_Failure(Controller,
-			"AUXILIARY STRUCTURE CREATION (SG)");
-      Controller->ScatterGatherPool = ScatterGatherPool;
-    }
-  else
-    {
-      CommandAllocationLength = offsetof(DAC960_Command_T, V2.EndMarker);
-      CommandAllocationGroupSize = DAC960_V2_CommandAllocationGroupSize;
-      ScatterGatherPool = dma_pool_create("DAC960_V2_ScatterGather",
-		&Controller->PCIDevice->dev,
-	DAC960_V2_ScatterGatherLimit * sizeof(DAC960_V2_ScatterGatherSegment_T),
-	sizeof(DAC960_V2_ScatterGatherSegment_T), 0);
-      if (ScatterGatherPool == NULL)
-	    return DAC960_Failure(Controller,
-			"AUXILIARY STRUCTURE CREATION (SG)");
-      RequestSensePool = dma_pool_create("DAC960_V2_RequestSense",
-		&Controller->PCIDevice->dev, sizeof(DAC960_SCSI_RequestSense_T),
-		sizeof(int), 0);
-      if (RequestSensePool == NULL) {
-	    dma_pool_destroy(ScatterGatherPool);
-	    return DAC960_Failure(Controller,
-			"AUXILIARY STRUCTURE CREATION (SG)");
-      }
-      Controller->ScatterGatherPool = ScatterGatherPool;
-      Controller->V2.RequestSensePool = RequestSensePool;
-    }
-  Controller->CommandAllocationGroupSize = CommandAllocationGroupSize;
-  Controller->FreeCommands = NULL;
-  for (CommandIdentifier = 1;
-       CommandIdentifier <= Controller->DriverQueueDepth;
-       CommandIdentifier++)
-    {
-      DAC960_Command_T *Command;
-      if (--CommandsRemaining <= 0)
-	{
-	  CommandsRemaining =
-		Controller->DriverQueueDepth - CommandIdentifier + 1;
-	  if (CommandsRemaining > CommandAllocationGroupSize)
-		CommandsRemaining = CommandAllocationGroupSize;
-	  CommandGroupByteCount =
-		CommandsRemaining * CommandAllocationLength;
-	  AllocationPointer = kzalloc(CommandGroupByteCount, GFP_ATOMIC);
-	  if (AllocationPointer == NULL)
-		return DAC960_Failure(Controller,
-					"AUXILIARY STRUCTURE CREATION");
-	 }
-      Command = (DAC960_Command_T *) AllocationPointer;
-      AllocationPointer += CommandAllocationLength;
-      Command->CommandIdentifier = CommandIdentifier;
-      Command->Controller = Controller;
-      Command->Next = Controller->FreeCommands;
-      Controller->FreeCommands = Command;
-      Controller->Commands[CommandIdentifier-1] = Command;
-      ScatterGatherCPU = dma_pool_alloc(ScatterGatherPool, GFP_ATOMIC,
-							&ScatterGatherDMA);
-      if (ScatterGatherCPU == NULL)
-	  return DAC960_Failure(Controller, "AUXILIARY STRUCTURE CREATION");
-
-      if (RequestSensePool != NULL) {
-	  RequestSenseCPU = dma_pool_alloc(RequestSensePool, GFP_ATOMIC,
-						&RequestSenseDMA);
-  	  if (RequestSenseCPU == NULL) {
-                dma_pool_free(ScatterGatherPool, ScatterGatherCPU,
-                                ScatterGatherDMA);
-    		return DAC960_Failure(Controller,
-					"AUXILIARY STRUCTURE CREATION");
-	  }
-        }
-     if (Controller->FirmwareType == DAC960_V1_Controller) {
-        Command->cmd_sglist = Command->V1.ScatterList;
-	Command->V1.ScatterGatherList =
-		(DAC960_V1_ScatterGatherSegment_T *)ScatterGatherCPU;
-	Command->V1.ScatterGatherListDMA = ScatterGatherDMA;
-	sg_init_table(Command->cmd_sglist, DAC960_V1_ScatterGatherLimit);
-      } else {
-        Command->cmd_sglist = Command->V2.ScatterList;
-	Command->V2.ScatterGatherList =
-		(DAC960_V2_ScatterGatherSegment_T *)ScatterGatherCPU;
-	Command->V2.ScatterGatherListDMA = ScatterGatherDMA;
-	Command->V2.RequestSense =
-				(DAC960_SCSI_RequestSense_T *)RequestSenseCPU;
-	Command->V2.RequestSenseDMA = RequestSenseDMA;
-	sg_init_table(Command->cmd_sglist, DAC960_V2_ScatterGatherLimit);
-      }
-    }
-  return true;
-}
-
-
-/*
-  DAC960_DestroyAuxiliaryStructures deallocates the auxiliary data
-  structures for Controller.
-*/
-
-static void DAC960_DestroyAuxiliaryStructures(DAC960_Controller_T *Controller)
-{
-  int i;
-  struct dma_pool *ScatterGatherPool = Controller->ScatterGatherPool;
-  struct dma_pool *RequestSensePool = NULL;
-  void *ScatterGatherCPU;
-  dma_addr_t ScatterGatherDMA;
-  void *RequestSenseCPU;
-  dma_addr_t RequestSenseDMA;
-  DAC960_Command_T *CommandGroup = NULL;
-  
-
-  if (Controller->FirmwareType == DAC960_V2_Controller)
-        RequestSensePool = Controller->V2.RequestSensePool;
-
-  Controller->FreeCommands = NULL;
-  for (i = 0; i < Controller->DriverQueueDepth; i++)
-    {
-      DAC960_Command_T *Command = Controller->Commands[i];
-
-      if (Command == NULL)
-	  continue;
-
-      if (Controller->FirmwareType == DAC960_V1_Controller) {
-	  ScatterGatherCPU = (void *)Command->V1.ScatterGatherList;
-	  ScatterGatherDMA = Command->V1.ScatterGatherListDMA;
-	  RequestSenseCPU = NULL;
-	  RequestSenseDMA = (dma_addr_t)0;
-      } else {
-          ScatterGatherCPU = (void *)Command->V2.ScatterGatherList;
-	  ScatterGatherDMA = Command->V2.ScatterGatherListDMA;
-	  RequestSenseCPU = (void *)Command->V2.RequestSense;
-	  RequestSenseDMA = Command->V2.RequestSenseDMA;
-      }
-      if (ScatterGatherCPU != NULL)
-          dma_pool_free(ScatterGatherPool, ScatterGatherCPU, ScatterGatherDMA);
-      if (RequestSenseCPU != NULL)
-          dma_pool_free(RequestSensePool, RequestSenseCPU, RequestSenseDMA);
-
-      if ((Command->CommandIdentifier
-	   % Controller->CommandAllocationGroupSize) == 1) {
-	   /*
-	    * We can't free the group of commands until all of the
-	    * request sense and scatter gather dma structures are free.
-            * Remember the beginning of the group, but don't free it
-	    * until we've reached the beginning of the next group.
-	    */
-	   kfree(CommandGroup);
-	   CommandGroup = Command;
-      }
-      Controller->Commands[i] = NULL;
-    }
-  kfree(CommandGroup);
-
-  if (Controller->CombinedStatusBuffer != NULL)
-    {
-      kfree(Controller->CombinedStatusBuffer);
-      Controller->CombinedStatusBuffer = NULL;
-      Controller->CurrentStatusBuffer = NULL;
-    }
-
-  dma_pool_destroy(ScatterGatherPool);
-  if (Controller->FirmwareType == DAC960_V1_Controller)
-  	return;
-
-  dma_pool_destroy(RequestSensePool);
-
-  for (i = 0; i < DAC960_MaxLogicalDrives; i++) {
-	kfree(Controller->V2.LogicalDeviceInformation[i]);
-	Controller->V2.LogicalDeviceInformation[i] = NULL;
-  }
-
-  for (i = 0; i < DAC960_V2_MaxPhysicalDevices; i++)
-    {
-      kfree(Controller->V2.PhysicalDeviceInformation[i]);
-      Controller->V2.PhysicalDeviceInformation[i] = NULL;
-      kfree(Controller->V2.InquiryUnitSerialNumber[i]);
-      Controller->V2.InquiryUnitSerialNumber[i] = NULL;
-    }
-}
-
-
-/*
-  DAC960_V1_ClearCommand clears critical fields of Command for DAC960 V1
-  Firmware Controllers.
-*/
-
-static inline void DAC960_V1_ClearCommand(DAC960_Command_T *Command)
-{
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  memset(CommandMailbox, 0, sizeof(DAC960_V1_CommandMailbox_T));
-  Command->V1.CommandStatus = 0;
-}
-
-
-/*
-  DAC960_V2_ClearCommand clears critical fields of Command for DAC960 V2
-  Firmware Controllers.
-*/
-
-static inline void DAC960_V2_ClearCommand(DAC960_Command_T *Command)
-{
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  memset(CommandMailbox, 0, sizeof(DAC960_V2_CommandMailbox_T));
-  Command->V2.CommandStatus = 0;
-}
-
-
-/*
-  DAC960_AllocateCommand allocates a Command structure from Controller's
-  free list.  During driver initialization, a special initialization command
-  has been placed on the free list to guarantee that command allocation can
-  never fail.
-*/
-
-static inline DAC960_Command_T *DAC960_AllocateCommand(DAC960_Controller_T
-						       *Controller)
-{
-  DAC960_Command_T *Command = Controller->FreeCommands;
-  if (Command == NULL) return NULL;
-  Controller->FreeCommands = Command->Next;
-  Command->Next = NULL;
-  return Command;
-}
-
-
-/*
-  DAC960_DeallocateCommand deallocates Command, returning it to Controller's
-  free list.
-*/
-
-static inline void DAC960_DeallocateCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-
-  Command->Request = NULL;
-  Command->Next = Controller->FreeCommands;
-  Controller->FreeCommands = Command;
-}
-
-
-/*
-  DAC960_WaitForCommand waits for a wake_up on Controller's Command Wait Queue.
-*/
-
-static void DAC960_WaitForCommand(DAC960_Controller_T *Controller)
-{
-  spin_unlock_irq(&Controller->queue_lock);
-  __wait_event(Controller->CommandWaitQueue, Controller->FreeCommands);
-  spin_lock_irq(&Controller->queue_lock);
-}
-
-/*
-  DAC960_GEM_QueueCommand queues Command for DAC960 GEM Series Controllers.
-*/
-
-static void DAC960_GEM_QueueCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_CommandMailbox_T *NextCommandMailbox =
-      Controller->V2.NextCommandMailbox;
-
-  CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
-  DAC960_GEM_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
-
-  if (Controller->V2.PreviousCommandMailbox1->Words[0] == 0 ||
-      Controller->V2.PreviousCommandMailbox2->Words[0] == 0)
-      DAC960_GEM_MemoryMailboxNewCommand(ControllerBaseAddress);
-
-  Controller->V2.PreviousCommandMailbox2 =
-      Controller->V2.PreviousCommandMailbox1;
-  Controller->V2.PreviousCommandMailbox1 = NextCommandMailbox;
-
-  if (++NextCommandMailbox > Controller->V2.LastCommandMailbox)
-      NextCommandMailbox = Controller->V2.FirstCommandMailbox;
-
-  Controller->V2.NextCommandMailbox = NextCommandMailbox;
-}
-
-/*
-  DAC960_BA_QueueCommand queues Command for DAC960 BA Series Controllers.
-*/
-
-static void DAC960_BA_QueueCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_CommandMailbox_T *NextCommandMailbox =
-    Controller->V2.NextCommandMailbox;
-  CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
-  DAC960_BA_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
-  if (Controller->V2.PreviousCommandMailbox1->Words[0] == 0 ||
-      Controller->V2.PreviousCommandMailbox2->Words[0] == 0)
-    DAC960_BA_MemoryMailboxNewCommand(ControllerBaseAddress);
-  Controller->V2.PreviousCommandMailbox2 =
-    Controller->V2.PreviousCommandMailbox1;
-  Controller->V2.PreviousCommandMailbox1 = NextCommandMailbox;
-  if (++NextCommandMailbox > Controller->V2.LastCommandMailbox)
-    NextCommandMailbox = Controller->V2.FirstCommandMailbox;
-  Controller->V2.NextCommandMailbox = NextCommandMailbox;
-}
-
-
-/*
-  DAC960_LP_QueueCommand queues Command for DAC960 LP Series Controllers.
-*/
-
-static void DAC960_LP_QueueCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_CommandMailbox_T *NextCommandMailbox =
-    Controller->V2.NextCommandMailbox;
-  CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
-  DAC960_LP_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
-  if (Controller->V2.PreviousCommandMailbox1->Words[0] == 0 ||
-      Controller->V2.PreviousCommandMailbox2->Words[0] == 0)
-    DAC960_LP_MemoryMailboxNewCommand(ControllerBaseAddress);
-  Controller->V2.PreviousCommandMailbox2 =
-    Controller->V2.PreviousCommandMailbox1;
-  Controller->V2.PreviousCommandMailbox1 = NextCommandMailbox;
-  if (++NextCommandMailbox > Controller->V2.LastCommandMailbox)
-    NextCommandMailbox = Controller->V2.FirstCommandMailbox;
-  Controller->V2.NextCommandMailbox = NextCommandMailbox;
-}
-
-
-/*
-  DAC960_LA_QueueCommandDualMode queues Command for DAC960 LA Series
-  Controllers with Dual Mode Firmware.
-*/
-
-static void DAC960_LA_QueueCommandDualMode(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  DAC960_V1_CommandMailbox_T *NextCommandMailbox =
-    Controller->V1.NextCommandMailbox;
-  CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
-  DAC960_LA_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
-  if (Controller->V1.PreviousCommandMailbox1->Words[0] == 0 ||
-      Controller->V1.PreviousCommandMailbox2->Words[0] == 0)
-    DAC960_LA_MemoryMailboxNewCommand(ControllerBaseAddress);
-  Controller->V1.PreviousCommandMailbox2 =
-    Controller->V1.PreviousCommandMailbox1;
-  Controller->V1.PreviousCommandMailbox1 = NextCommandMailbox;
-  if (++NextCommandMailbox > Controller->V1.LastCommandMailbox)
-    NextCommandMailbox = Controller->V1.FirstCommandMailbox;
-  Controller->V1.NextCommandMailbox = NextCommandMailbox;
-}
-
-
-/*
-  DAC960_LA_QueueCommandSingleMode queues Command for DAC960 LA Series
-  Controllers with Single Mode Firmware.
-*/
-
-static void DAC960_LA_QueueCommandSingleMode(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  DAC960_V1_CommandMailbox_T *NextCommandMailbox =
-    Controller->V1.NextCommandMailbox;
-  CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
-  DAC960_LA_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
-  if (Controller->V1.PreviousCommandMailbox1->Words[0] == 0 ||
-      Controller->V1.PreviousCommandMailbox2->Words[0] == 0)
-    DAC960_LA_HardwareMailboxNewCommand(ControllerBaseAddress);
-  Controller->V1.PreviousCommandMailbox2 =
-    Controller->V1.PreviousCommandMailbox1;
-  Controller->V1.PreviousCommandMailbox1 = NextCommandMailbox;
-  if (++NextCommandMailbox > Controller->V1.LastCommandMailbox)
-    NextCommandMailbox = Controller->V1.FirstCommandMailbox;
-  Controller->V1.NextCommandMailbox = NextCommandMailbox;
-}
-
-
-/*
-  DAC960_PG_QueueCommandDualMode queues Command for DAC960 PG Series
-  Controllers with Dual Mode Firmware.
-*/
-
-static void DAC960_PG_QueueCommandDualMode(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  DAC960_V1_CommandMailbox_T *NextCommandMailbox =
-    Controller->V1.NextCommandMailbox;
-  CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
-  DAC960_PG_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
-  if (Controller->V1.PreviousCommandMailbox1->Words[0] == 0 ||
-      Controller->V1.PreviousCommandMailbox2->Words[0] == 0)
-    DAC960_PG_MemoryMailboxNewCommand(ControllerBaseAddress);
-  Controller->V1.PreviousCommandMailbox2 =
-    Controller->V1.PreviousCommandMailbox1;
-  Controller->V1.PreviousCommandMailbox1 = NextCommandMailbox;
-  if (++NextCommandMailbox > Controller->V1.LastCommandMailbox)
-    NextCommandMailbox = Controller->V1.FirstCommandMailbox;
-  Controller->V1.NextCommandMailbox = NextCommandMailbox;
-}
-
-
-/*
-  DAC960_PG_QueueCommandSingleMode queues Command for DAC960 PG Series
-  Controllers with Single Mode Firmware.
-*/
-
-static void DAC960_PG_QueueCommandSingleMode(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  DAC960_V1_CommandMailbox_T *NextCommandMailbox =
-    Controller->V1.NextCommandMailbox;
-  CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
-  DAC960_PG_WriteCommandMailbox(NextCommandMailbox, CommandMailbox);
-  if (Controller->V1.PreviousCommandMailbox1->Words[0] == 0 ||
-      Controller->V1.PreviousCommandMailbox2->Words[0] == 0)
-    DAC960_PG_HardwareMailboxNewCommand(ControllerBaseAddress);
-  Controller->V1.PreviousCommandMailbox2 =
-    Controller->V1.PreviousCommandMailbox1;
-  Controller->V1.PreviousCommandMailbox1 = NextCommandMailbox;
-  if (++NextCommandMailbox > Controller->V1.LastCommandMailbox)
-    NextCommandMailbox = Controller->V1.FirstCommandMailbox;
-  Controller->V1.NextCommandMailbox = NextCommandMailbox;
-}
-
-
-/*
-  DAC960_PD_QueueCommand queues Command for DAC960 PD Series Controllers.
-*/
-
-static void DAC960_PD_QueueCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
-  while (DAC960_PD_MailboxFullP(ControllerBaseAddress))
-    udelay(1);
-  DAC960_PD_WriteCommandMailbox(ControllerBaseAddress, CommandMailbox);
-  DAC960_PD_NewCommand(ControllerBaseAddress);
-}
-
-
-/*
-  DAC960_P_QueueCommand queues Command for DAC960 P Series Controllers.
-*/
-
-static void DAC960_P_QueueCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  CommandMailbox->Common.CommandIdentifier = Command->CommandIdentifier;
-  switch (CommandMailbox->Common.CommandOpcode)
-    {
-    case DAC960_V1_Enquiry:
-      CommandMailbox->Common.CommandOpcode = DAC960_V1_Enquiry_Old;
-      break;
-    case DAC960_V1_GetDeviceState:
-      CommandMailbox->Common.CommandOpcode = DAC960_V1_GetDeviceState_Old;
-      break;
-    case DAC960_V1_Read:
-      CommandMailbox->Common.CommandOpcode = DAC960_V1_Read_Old;
-      DAC960_PD_To_P_TranslateReadWriteCommand(CommandMailbox);
-      break;
-    case DAC960_V1_Write:
-      CommandMailbox->Common.CommandOpcode = DAC960_V1_Write_Old;
-      DAC960_PD_To_P_TranslateReadWriteCommand(CommandMailbox);
-      break;
-    case DAC960_V1_ReadWithScatterGather:
-      CommandMailbox->Common.CommandOpcode =
-	DAC960_V1_ReadWithScatterGather_Old;
-      DAC960_PD_To_P_TranslateReadWriteCommand(CommandMailbox);
-      break;
-    case DAC960_V1_WriteWithScatterGather:
-      CommandMailbox->Common.CommandOpcode =
-	DAC960_V1_WriteWithScatterGather_Old;
-      DAC960_PD_To_P_TranslateReadWriteCommand(CommandMailbox);
-      break;
-    default:
-      break;
-    }
-  while (DAC960_PD_MailboxFullP(ControllerBaseAddress))
-    udelay(1);
-  DAC960_PD_WriteCommandMailbox(ControllerBaseAddress, CommandMailbox);
-  DAC960_PD_NewCommand(ControllerBaseAddress);
-}
-
-
-/*
-  DAC960_ExecuteCommand executes Command and waits for completion.
-*/
-
-static void DAC960_ExecuteCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  DECLARE_COMPLETION_ONSTACK(Completion);
-  unsigned long flags;
-  Command->Completion = &Completion;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  DAC960_QueueCommand(Command);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
- 
-  if (in_interrupt())
-	  return;
-  wait_for_completion(&Completion);
-}
-
-
-/*
-  DAC960_V1_ExecuteType3 executes a DAC960 V1 Firmware Controller Type 3
-  Command and waits for completion.  It returns true on success and false
-  on failure.
-*/
-
-static bool DAC960_V1_ExecuteType3(DAC960_Controller_T *Controller,
-				      DAC960_V1_CommandOpcode_T CommandOpcode,
-				      dma_addr_t DataDMA)
-{
-  DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  DAC960_V1_CommandStatus_T CommandStatus;
-  DAC960_V1_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox->Type3.CommandOpcode = CommandOpcode;
-  CommandMailbox->Type3.BusAddress = DataDMA;
-  DAC960_ExecuteCommand(Command);
-  CommandStatus = Command->V1.CommandStatus;
-  DAC960_DeallocateCommand(Command);
-  return (CommandStatus == DAC960_V1_NormalCompletion);
-}
-
-
-/*
-  DAC960_V1_ExecuteTypeB executes a DAC960 V1 Firmware Controller Type 3B
-  Command and waits for completion.  It returns true on success and false
-  on failure.
-*/
-
-static bool DAC960_V1_ExecuteType3B(DAC960_Controller_T *Controller,
-				       DAC960_V1_CommandOpcode_T CommandOpcode,
-				       unsigned char CommandOpcode2,
-				       dma_addr_t DataDMA)
-{
-  DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  DAC960_V1_CommandStatus_T CommandStatus;
-  DAC960_V1_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox->Type3B.CommandOpcode = CommandOpcode;
-  CommandMailbox->Type3B.CommandOpcode2 = CommandOpcode2;
-  CommandMailbox->Type3B.BusAddress = DataDMA;
-  DAC960_ExecuteCommand(Command);
-  CommandStatus = Command->V1.CommandStatus;
-  DAC960_DeallocateCommand(Command);
-  return (CommandStatus == DAC960_V1_NormalCompletion);
-}
-
-
-/*
-  DAC960_V1_ExecuteType3D executes a DAC960 V1 Firmware Controller Type 3D
-  Command and waits for completion.  It returns true on success and false
-  on failure.
-*/
-
-static bool DAC960_V1_ExecuteType3D(DAC960_Controller_T *Controller,
-				       DAC960_V1_CommandOpcode_T CommandOpcode,
-				       unsigned char Channel,
-				       unsigned char TargetID,
-				       dma_addr_t DataDMA)
-{
-  DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  DAC960_V1_CommandStatus_T CommandStatus;
-  DAC960_V1_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox->Type3D.CommandOpcode = CommandOpcode;
-  CommandMailbox->Type3D.Channel = Channel;
-  CommandMailbox->Type3D.TargetID = TargetID;
-  CommandMailbox->Type3D.BusAddress = DataDMA;
-  DAC960_ExecuteCommand(Command);
-  CommandStatus = Command->V1.CommandStatus;
-  DAC960_DeallocateCommand(Command);
-  return (CommandStatus == DAC960_V1_NormalCompletion);
-}
-
-
-/*
-  DAC960_V2_GeneralInfo executes a DAC960 V2 Firmware General Information
-  Reading IOCTL Command and waits for completion.  It returns true on success
-  and false on failure.
-
-  Return data in The controller's HealthStatusBuffer, which is dma-able memory
-*/
-
-static bool DAC960_V2_GeneralInfo(DAC960_Controller_T *Controller)
-{
-  DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_CommandStatus_T CommandStatus;
-  DAC960_V2_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox->Common.CommandOpcode = DAC960_V2_IOCTL;
-  CommandMailbox->Common.CommandControlBits
-			.DataTransferControllerToHost = true;
-  CommandMailbox->Common.CommandControlBits
-			.NoAutoRequestSense = true;
-  CommandMailbox->Common.DataTransferSize = sizeof(DAC960_V2_HealthStatusBuffer_T);
-  CommandMailbox->Common.IOCTL_Opcode = DAC960_V2_GetHealthStatus;
-  CommandMailbox->Common.DataTransferMemoryAddress
-			.ScatterGatherSegments[0]
-			.SegmentDataPointer =
-    Controller->V2.HealthStatusBufferDMA;
-  CommandMailbox->Common.DataTransferMemoryAddress
-			.ScatterGatherSegments[0]
-			.SegmentByteCount =
-    CommandMailbox->Common.DataTransferSize;
-  DAC960_ExecuteCommand(Command);
-  CommandStatus = Command->V2.CommandStatus;
-  DAC960_DeallocateCommand(Command);
-  return (CommandStatus == DAC960_V2_NormalCompletion);
-}
-
-
-/*
-  DAC960_V2_ControllerInfo executes a DAC960 V2 Firmware Controller
-  Information Reading IOCTL Command and waits for completion.  It returns
-  true on success and false on failure.
-
-  Data is returned in the controller's V2.NewControllerInformation dma-able
-  memory buffer.
-*/
-
-static bool DAC960_V2_NewControllerInfo(DAC960_Controller_T *Controller)
-{
-  DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_CommandStatus_T CommandStatus;
-  DAC960_V2_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox->ControllerInfo.CommandOpcode = DAC960_V2_IOCTL;
-  CommandMailbox->ControllerInfo.CommandControlBits
-				.DataTransferControllerToHost = true;
-  CommandMailbox->ControllerInfo.CommandControlBits
-				.NoAutoRequestSense = true;
-  CommandMailbox->ControllerInfo.DataTransferSize = sizeof(DAC960_V2_ControllerInfo_T);
-  CommandMailbox->ControllerInfo.ControllerNumber = 0;
-  CommandMailbox->ControllerInfo.IOCTL_Opcode = DAC960_V2_GetControllerInfo;
-  CommandMailbox->ControllerInfo.DataTransferMemoryAddress
-				.ScatterGatherSegments[0]
-				.SegmentDataPointer =
-    	Controller->V2.NewControllerInformationDMA;
-  CommandMailbox->ControllerInfo.DataTransferMemoryAddress
-				.ScatterGatherSegments[0]
-				.SegmentByteCount =
-    CommandMailbox->ControllerInfo.DataTransferSize;
-  DAC960_ExecuteCommand(Command);
-  CommandStatus = Command->V2.CommandStatus;
-  DAC960_DeallocateCommand(Command);
-  return (CommandStatus == DAC960_V2_NormalCompletion);
-}
-
-
-/*
-  DAC960_V2_LogicalDeviceInfo executes a DAC960 V2 Firmware Controller Logical
-  Device Information Reading IOCTL Command and waits for completion.  It
-  returns true on success and false on failure.
-
-  Data is returned in the controller's V2.NewLogicalDeviceInformation
-*/
-
-static bool DAC960_V2_NewLogicalDeviceInfo(DAC960_Controller_T *Controller,
-					   unsigned short LogicalDeviceNumber)
-{
-  DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_CommandStatus_T CommandStatus;
-
-  DAC960_V2_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox->LogicalDeviceInfo.CommandOpcode =
-				DAC960_V2_IOCTL;
-  CommandMailbox->LogicalDeviceInfo.CommandControlBits
-				   .DataTransferControllerToHost = true;
-  CommandMailbox->LogicalDeviceInfo.CommandControlBits
-				   .NoAutoRequestSense = true;
-  CommandMailbox->LogicalDeviceInfo.DataTransferSize = 
-				sizeof(DAC960_V2_LogicalDeviceInfo_T);
-  CommandMailbox->LogicalDeviceInfo.LogicalDevice.LogicalDeviceNumber =
-    LogicalDeviceNumber;
-  CommandMailbox->LogicalDeviceInfo.IOCTL_Opcode = DAC960_V2_GetLogicalDeviceInfoValid;
-  CommandMailbox->LogicalDeviceInfo.DataTransferMemoryAddress
-				   .ScatterGatherSegments[0]
-				   .SegmentDataPointer =
-    	Controller->V2.NewLogicalDeviceInformationDMA;
-  CommandMailbox->LogicalDeviceInfo.DataTransferMemoryAddress
-				   .ScatterGatherSegments[0]
-				   .SegmentByteCount =
-    CommandMailbox->LogicalDeviceInfo.DataTransferSize;
-  DAC960_ExecuteCommand(Command);
-  CommandStatus = Command->V2.CommandStatus;
-  DAC960_DeallocateCommand(Command);
-  return (CommandStatus == DAC960_V2_NormalCompletion);
-}
-
-
-/*
-  DAC960_V2_PhysicalDeviceInfo executes a DAC960 V2 Firmware Controller "Read
-  Physical Device Information" IOCTL Command and waits for completion.  It
-  returns true on success and false on failure.
-
-  The Channel, TargetID, LogicalUnit arguments should be 0 the first time
-  this function is called for a given controller.  This will return data
-  for the "first" device on that controller.  The returned data includes a
-  Channel, TargetID, LogicalUnit that can be passed in to this routine to
-  get data for the NEXT device on that controller.
-
-  Data is stored in the controller's V2.NewPhysicalDeviceInfo dma-able
-  memory buffer.
-
-*/
-
-static bool DAC960_V2_NewPhysicalDeviceInfo(DAC960_Controller_T *Controller,
-					    unsigned char Channel,
-					    unsigned char TargetID,
-					    unsigned char LogicalUnit)
-{
-  DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_CommandStatus_T CommandStatus;
-
-  DAC960_V2_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox->PhysicalDeviceInfo.CommandOpcode = DAC960_V2_IOCTL;
-  CommandMailbox->PhysicalDeviceInfo.CommandControlBits
-				    .DataTransferControllerToHost = true;
-  CommandMailbox->PhysicalDeviceInfo.CommandControlBits
-				    .NoAutoRequestSense = true;
-  CommandMailbox->PhysicalDeviceInfo.DataTransferSize =
-				sizeof(DAC960_V2_PhysicalDeviceInfo_T);
-  CommandMailbox->PhysicalDeviceInfo.PhysicalDevice.LogicalUnit = LogicalUnit;
-  CommandMailbox->PhysicalDeviceInfo.PhysicalDevice.TargetID = TargetID;
-  CommandMailbox->PhysicalDeviceInfo.PhysicalDevice.Channel = Channel;
-  CommandMailbox->PhysicalDeviceInfo.IOCTL_Opcode =
-					DAC960_V2_GetPhysicalDeviceInfoValid;
-  CommandMailbox->PhysicalDeviceInfo.DataTransferMemoryAddress
-				    .ScatterGatherSegments[0]
-				    .SegmentDataPointer =
-    					Controller->V2.NewPhysicalDeviceInformationDMA;
-  CommandMailbox->PhysicalDeviceInfo.DataTransferMemoryAddress
-				    .ScatterGatherSegments[0]
-				    .SegmentByteCount =
-    CommandMailbox->PhysicalDeviceInfo.DataTransferSize;
-  DAC960_ExecuteCommand(Command);
-  CommandStatus = Command->V2.CommandStatus;
-  DAC960_DeallocateCommand(Command);
-  return (CommandStatus == DAC960_V2_NormalCompletion);
-}
-
-
-static void DAC960_V2_ConstructNewUnitSerialNumber(
-	DAC960_Controller_T *Controller,
-	DAC960_V2_CommandMailbox_T *CommandMailbox, int Channel, int TargetID,
-	int LogicalUnit)
-{
-      CommandMailbox->SCSI_10.CommandOpcode = DAC960_V2_SCSI_10_Passthru;
-      CommandMailbox->SCSI_10.CommandControlBits
-			     .DataTransferControllerToHost = true;
-      CommandMailbox->SCSI_10.CommandControlBits
-			     .NoAutoRequestSense = true;
-      CommandMailbox->SCSI_10.DataTransferSize =
-	sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
-      CommandMailbox->SCSI_10.PhysicalDevice.LogicalUnit = LogicalUnit;
-      CommandMailbox->SCSI_10.PhysicalDevice.TargetID = TargetID;
-      CommandMailbox->SCSI_10.PhysicalDevice.Channel = Channel;
-      CommandMailbox->SCSI_10.CDBLength = 6;
-      CommandMailbox->SCSI_10.SCSI_CDB[0] = 0x12; /* INQUIRY */
-      CommandMailbox->SCSI_10.SCSI_CDB[1] = 1; /* EVPD = 1 */
-      CommandMailbox->SCSI_10.SCSI_CDB[2] = 0x80; /* Page Code */
-      CommandMailbox->SCSI_10.SCSI_CDB[3] = 0; /* Reserved */
-      CommandMailbox->SCSI_10.SCSI_CDB[4] =
-	sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
-      CommandMailbox->SCSI_10.SCSI_CDB[5] = 0; /* Control */
-      CommandMailbox->SCSI_10.DataTransferMemoryAddress
-			     .ScatterGatherSegments[0]
-			     .SegmentDataPointer =
-		Controller->V2.NewInquiryUnitSerialNumberDMA;
-      CommandMailbox->SCSI_10.DataTransferMemoryAddress
-			     .ScatterGatherSegments[0]
-			     .SegmentByteCount =
-		CommandMailbox->SCSI_10.DataTransferSize;
-}
-
-
-/*
-  DAC960_V2_NewUnitSerialNumber executes an SCSI pass-through
-  Inquiry command to a SCSI device identified by Channel number,
-  Target id, Logical Unit Number.  This function Waits for completion
-  of the command.
-
-  The return data includes Unit Serial Number information for the
-  specified device.
-
-  Data is stored in the controller's V2.NewPhysicalDeviceInfo dma-able
-  memory buffer.
-*/
-
-static bool DAC960_V2_NewInquiryUnitSerialNumber(DAC960_Controller_T *Controller,
-			int Channel, int TargetID, int LogicalUnit)
-{
-      DAC960_Command_T *Command;
-      DAC960_V2_CommandMailbox_T *CommandMailbox;
-      DAC960_V2_CommandStatus_T CommandStatus;
-
-      Command = DAC960_AllocateCommand(Controller);
-      CommandMailbox = &Command->V2.CommandMailbox;
-      DAC960_V2_ClearCommand(Command);
-      Command->CommandType = DAC960_ImmediateCommand;
-
-      DAC960_V2_ConstructNewUnitSerialNumber(Controller, CommandMailbox,
-			Channel, TargetID, LogicalUnit);
-
-      DAC960_ExecuteCommand(Command);
-      CommandStatus = Command->V2.CommandStatus;
-      DAC960_DeallocateCommand(Command);
-      return (CommandStatus == DAC960_V2_NormalCompletion);
-}
-
-
-/*
-  DAC960_V2_DeviceOperation executes a DAC960 V2 Firmware Controller Device
-  Operation IOCTL Command and waits for completion.  It returns true on
-  success and false on failure.
-*/
-
-static bool DAC960_V2_DeviceOperation(DAC960_Controller_T *Controller,
-					 DAC960_V2_IOCTL_Opcode_T IOCTL_Opcode,
-					 DAC960_V2_OperationDevice_T
-					   OperationDevice)
-{
-  DAC960_Command_T *Command = DAC960_AllocateCommand(Controller);
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_CommandStatus_T CommandStatus;
-  DAC960_V2_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox->DeviceOperation.CommandOpcode = DAC960_V2_IOCTL;
-  CommandMailbox->DeviceOperation.CommandControlBits
-				 .DataTransferControllerToHost = true;
-  CommandMailbox->DeviceOperation.CommandControlBits
-    				 .NoAutoRequestSense = true;
-  CommandMailbox->DeviceOperation.IOCTL_Opcode = IOCTL_Opcode;
-  CommandMailbox->DeviceOperation.OperationDevice = OperationDevice;
-  DAC960_ExecuteCommand(Command);
-  CommandStatus = Command->V2.CommandStatus;
-  DAC960_DeallocateCommand(Command);
-  return (CommandStatus == DAC960_V2_NormalCompletion);
-}
-
-
-/*
-  DAC960_V1_EnableMemoryMailboxInterface enables the Memory Mailbox Interface
-  for DAC960 V1 Firmware Controllers.
-
-  PD and P controller types have no memory mailbox, but still need the
-  other dma mapped memory.
-*/
-
-static bool DAC960_V1_EnableMemoryMailboxInterface(DAC960_Controller_T
-						      *Controller)
-{
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_HardwareType_T hw_type = Controller->HardwareType;
-  struct pci_dev *PCI_Device = Controller->PCIDevice;
-  struct dma_loaf *DmaPages = &Controller->DmaPages;
-  size_t DmaPagesSize;
-  size_t CommandMailboxesSize;
-  size_t StatusMailboxesSize;
-
-  DAC960_V1_CommandMailbox_T *CommandMailboxesMemory;
-  dma_addr_t CommandMailboxesMemoryDMA;
-
-  DAC960_V1_StatusMailbox_T *StatusMailboxesMemory;
-  dma_addr_t StatusMailboxesMemoryDMA;
-
-  DAC960_V1_CommandMailbox_T CommandMailbox;
-  DAC960_V1_CommandStatus_T CommandStatus;
-  int TimeoutCounter;
-  int i;
-
-  memset(&CommandMailbox, 0, sizeof(DAC960_V1_CommandMailbox_T));
-
-  if (pci_set_dma_mask(Controller->PCIDevice, DMA_BIT_MASK(32)))
-	return DAC960_Failure(Controller, "DMA mask out of range");
-
-  if ((hw_type == DAC960_PD_Controller) || (hw_type == DAC960_P_Controller)) {
-    CommandMailboxesSize =  0;
-    StatusMailboxesSize = 0;
-  } else {
-    CommandMailboxesSize =  DAC960_V1_CommandMailboxCount * sizeof(DAC960_V1_CommandMailbox_T);
-    StatusMailboxesSize = DAC960_V1_StatusMailboxCount * sizeof(DAC960_V1_StatusMailbox_T);
-  }
-  DmaPagesSize = CommandMailboxesSize + StatusMailboxesSize + 
-	sizeof(DAC960_V1_DCDB_T) + sizeof(DAC960_V1_Enquiry_T) +
-	sizeof(DAC960_V1_ErrorTable_T) + sizeof(DAC960_V1_EventLogEntry_T) +
-	sizeof(DAC960_V1_RebuildProgress_T) +
-	sizeof(DAC960_V1_LogicalDriveInformationArray_T) +
-	sizeof(DAC960_V1_BackgroundInitializationStatus_T) +
-	sizeof(DAC960_V1_DeviceState_T) + sizeof(DAC960_SCSI_Inquiry_T) +
-	sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
-
-  if (!init_dma_loaf(PCI_Device, DmaPages, DmaPagesSize))
-	return false;
-
-
-  if ((hw_type == DAC960_PD_Controller) || (hw_type == DAC960_P_Controller)) 
-	goto skip_mailboxes;
-
-  CommandMailboxesMemory = slice_dma_loaf(DmaPages,
-                CommandMailboxesSize, &CommandMailboxesMemoryDMA);
-  
-  /* These are the base addresses for the command memory mailbox array */
-  Controller->V1.FirstCommandMailbox = CommandMailboxesMemory;
-  Controller->V1.FirstCommandMailboxDMA = CommandMailboxesMemoryDMA;
-
-  CommandMailboxesMemory += DAC960_V1_CommandMailboxCount - 1;
-  Controller->V1.LastCommandMailbox = CommandMailboxesMemory;
-  Controller->V1.NextCommandMailbox = Controller->V1.FirstCommandMailbox;
-  Controller->V1.PreviousCommandMailbox1 = Controller->V1.LastCommandMailbox;
-  Controller->V1.PreviousCommandMailbox2 =
-	  				Controller->V1.LastCommandMailbox - 1;
-
-  /* These are the base addresses for the status memory mailbox array */
-  StatusMailboxesMemory = slice_dma_loaf(DmaPages,
-                StatusMailboxesSize, &StatusMailboxesMemoryDMA);
-
-  Controller->V1.FirstStatusMailbox = StatusMailboxesMemory;
-  Controller->V1.FirstStatusMailboxDMA = StatusMailboxesMemoryDMA;
-  StatusMailboxesMemory += DAC960_V1_StatusMailboxCount - 1;
-  Controller->V1.LastStatusMailbox = StatusMailboxesMemory;
-  Controller->V1.NextStatusMailbox = Controller->V1.FirstStatusMailbox;
-
-skip_mailboxes:
-  Controller->V1.MonitoringDCDB = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V1_DCDB_T),
-                &Controller->V1.MonitoringDCDB_DMA);
-
-  Controller->V1.NewEnquiry = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V1_Enquiry_T),
-                &Controller->V1.NewEnquiryDMA);
-
-  Controller->V1.NewErrorTable = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V1_ErrorTable_T),
-                &Controller->V1.NewErrorTableDMA);
-
-  Controller->V1.EventLogEntry = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V1_EventLogEntry_T),
-                &Controller->V1.EventLogEntryDMA);
-
-  Controller->V1.RebuildProgress = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V1_RebuildProgress_T),
-                &Controller->V1.RebuildProgressDMA);
-
-  Controller->V1.NewLogicalDriveInformation = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V1_LogicalDriveInformationArray_T),
-                &Controller->V1.NewLogicalDriveInformationDMA);
-
-  Controller->V1.BackgroundInitializationStatus = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V1_BackgroundInitializationStatus_T),
-                &Controller->V1.BackgroundInitializationStatusDMA);
-
-  Controller->V1.NewDeviceState = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V1_DeviceState_T),
-                &Controller->V1.NewDeviceStateDMA);
-
-  Controller->V1.NewInquiryStandardData = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_SCSI_Inquiry_T),
-                &Controller->V1.NewInquiryStandardDataDMA);
-
-  Controller->V1.NewInquiryUnitSerialNumber = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T),
-                &Controller->V1.NewInquiryUnitSerialNumberDMA);
-
-  if ((hw_type == DAC960_PD_Controller) || (hw_type == DAC960_P_Controller))
-	return true;
- 
-  /* Enable the Memory Mailbox Interface. */
-  Controller->V1.DualModeMemoryMailboxInterface = true;
-  CommandMailbox.TypeX.CommandOpcode = 0x2B;
-  CommandMailbox.TypeX.CommandIdentifier = 0;
-  CommandMailbox.TypeX.CommandOpcode2 = 0x14;
-  CommandMailbox.TypeX.CommandMailboxesBusAddress =
-    				Controller->V1.FirstCommandMailboxDMA;
-  CommandMailbox.TypeX.StatusMailboxesBusAddress =
-    				Controller->V1.FirstStatusMailboxDMA;
-#define TIMEOUT_COUNT 1000000
-
-  for (i = 0; i < 2; i++)
-    switch (Controller->HardwareType)
-      {
-      case DAC960_LA_Controller:
-	TimeoutCounter = TIMEOUT_COUNT;
-	while (--TimeoutCounter >= 0)
-	  {
-	    if (!DAC960_LA_HardwareMailboxFullP(ControllerBaseAddress))
-	      break;
-	    udelay(10);
-	  }
-	if (TimeoutCounter < 0) return false;
-	DAC960_LA_WriteHardwareMailbox(ControllerBaseAddress, &CommandMailbox);
-	DAC960_LA_HardwareMailboxNewCommand(ControllerBaseAddress);
-	TimeoutCounter = TIMEOUT_COUNT;
-	while (--TimeoutCounter >= 0)
-	  {
-	    if (DAC960_LA_HardwareMailboxStatusAvailableP(
-		  ControllerBaseAddress))
-	      break;
-	    udelay(10);
-	  }
-	if (TimeoutCounter < 0) return false;
-	CommandStatus = DAC960_LA_ReadStatusRegister(ControllerBaseAddress);
-	DAC960_LA_AcknowledgeHardwareMailboxInterrupt(ControllerBaseAddress);
-	DAC960_LA_AcknowledgeHardwareMailboxStatus(ControllerBaseAddress);
-	if (CommandStatus == DAC960_V1_NormalCompletion) return true;
-	Controller->V1.DualModeMemoryMailboxInterface = false;
-	CommandMailbox.TypeX.CommandOpcode2 = 0x10;
-	break;
-      case DAC960_PG_Controller:
-	TimeoutCounter = TIMEOUT_COUNT;
-	while (--TimeoutCounter >= 0)
-	  {
-	    if (!DAC960_PG_HardwareMailboxFullP(ControllerBaseAddress))
-	      break;
-	    udelay(10);
-	  }
-	if (TimeoutCounter < 0) return false;
-	DAC960_PG_WriteHardwareMailbox(ControllerBaseAddress, &CommandMailbox);
-	DAC960_PG_HardwareMailboxNewCommand(ControllerBaseAddress);
-
-	TimeoutCounter = TIMEOUT_COUNT;
-	while (--TimeoutCounter >= 0)
-	  {
-	    if (DAC960_PG_HardwareMailboxStatusAvailableP(
-		  ControllerBaseAddress))
-	      break;
-	    udelay(10);
-	  }
-	if (TimeoutCounter < 0) return false;
-	CommandStatus = DAC960_PG_ReadStatusRegister(ControllerBaseAddress);
-	DAC960_PG_AcknowledgeHardwareMailboxInterrupt(ControllerBaseAddress);
-	DAC960_PG_AcknowledgeHardwareMailboxStatus(ControllerBaseAddress);
-	if (CommandStatus == DAC960_V1_NormalCompletion) return true;
-	Controller->V1.DualModeMemoryMailboxInterface = false;
-	CommandMailbox.TypeX.CommandOpcode2 = 0x10;
-	break;
-      default:
-        DAC960_Failure(Controller, "Unknown Controller Type\n");
-	break;
-      }
-  return false;
-}
-
-
-/*
-  DAC960_V2_EnableMemoryMailboxInterface enables the Memory Mailbox Interface
-  for DAC960 V2 Firmware Controllers.
-
-  Aggregate the space needed for the controller's memory mailbox and
-  the other data structures that will be targets of dma transfers with
-  the controller.  Allocate a dma-mapped region of memory to hold these
-  structures.  Then, save CPU pointers and dma_addr_t values to reference
-  the structures that are contained in that region.
-*/
-
-static bool DAC960_V2_EnableMemoryMailboxInterface(DAC960_Controller_T
-						      *Controller)
-{
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  struct pci_dev *PCI_Device = Controller->PCIDevice;
-  struct dma_loaf *DmaPages = &Controller->DmaPages;
-  size_t DmaPagesSize;
-  size_t CommandMailboxesSize;
-  size_t StatusMailboxesSize;
-
-  DAC960_V2_CommandMailbox_T *CommandMailboxesMemory;
-  dma_addr_t CommandMailboxesMemoryDMA;
-
-  DAC960_V2_StatusMailbox_T *StatusMailboxesMemory;
-  dma_addr_t StatusMailboxesMemoryDMA;
-
-  DAC960_V2_CommandMailbox_T *CommandMailbox;
-  dma_addr_t	CommandMailboxDMA;
-  DAC960_V2_CommandStatus_T CommandStatus;
-
-	if (pci_set_dma_mask(Controller->PCIDevice, DMA_BIT_MASK(64)) &&
-	    pci_set_dma_mask(Controller->PCIDevice, DMA_BIT_MASK(32)))
-		return DAC960_Failure(Controller, "DMA mask out of range");
-
-  /* This is a temporary dma mapping, used only in the scope of this function */
-  CommandMailbox = pci_alloc_consistent(PCI_Device,
-		sizeof(DAC960_V2_CommandMailbox_T), &CommandMailboxDMA);
-  if (CommandMailbox == NULL)
-	  return false;
-
-  CommandMailboxesSize = DAC960_V2_CommandMailboxCount * sizeof(DAC960_V2_CommandMailbox_T);
-  StatusMailboxesSize = DAC960_V2_StatusMailboxCount * sizeof(DAC960_V2_StatusMailbox_T);
-  DmaPagesSize =
-    CommandMailboxesSize + StatusMailboxesSize +
-    sizeof(DAC960_V2_HealthStatusBuffer_T) +
-    sizeof(DAC960_V2_ControllerInfo_T) +
-    sizeof(DAC960_V2_LogicalDeviceInfo_T) +
-    sizeof(DAC960_V2_PhysicalDeviceInfo_T) +
-    sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T) +
-    sizeof(DAC960_V2_Event_T) +
-    sizeof(DAC960_V2_PhysicalToLogicalDevice_T);
-
-  if (!init_dma_loaf(PCI_Device, DmaPages, DmaPagesSize)) {
-  	pci_free_consistent(PCI_Device, sizeof(DAC960_V2_CommandMailbox_T),
-					CommandMailbox, CommandMailboxDMA);
-	return false;
-  }
-
-  CommandMailboxesMemory = slice_dma_loaf(DmaPages,
-		CommandMailboxesSize, &CommandMailboxesMemoryDMA);
-
-  /* These are the base addresses for the command memory mailbox array */
-  Controller->V2.FirstCommandMailbox = CommandMailboxesMemory;
-  Controller->V2.FirstCommandMailboxDMA = CommandMailboxesMemoryDMA;
-
-  CommandMailboxesMemory += DAC960_V2_CommandMailboxCount - 1;
-  Controller->V2.LastCommandMailbox = CommandMailboxesMemory;
-  Controller->V2.NextCommandMailbox = Controller->V2.FirstCommandMailbox;
-  Controller->V2.PreviousCommandMailbox1 = Controller->V2.LastCommandMailbox;
-  Controller->V2.PreviousCommandMailbox2 =
-    					Controller->V2.LastCommandMailbox - 1;
-
-  /* These are the base addresses for the status memory mailbox array */
-  StatusMailboxesMemory = slice_dma_loaf(DmaPages,
-		StatusMailboxesSize, &StatusMailboxesMemoryDMA);
-
-  Controller->V2.FirstStatusMailbox = StatusMailboxesMemory;
-  Controller->V2.FirstStatusMailboxDMA = StatusMailboxesMemoryDMA;
-  StatusMailboxesMemory += DAC960_V2_StatusMailboxCount - 1;
-  Controller->V2.LastStatusMailbox = StatusMailboxesMemory;
-  Controller->V2.NextStatusMailbox = Controller->V2.FirstStatusMailbox;
-
-  Controller->V2.HealthStatusBuffer = slice_dma_loaf(DmaPages,
-		sizeof(DAC960_V2_HealthStatusBuffer_T),
-		&Controller->V2.HealthStatusBufferDMA);
-
-  Controller->V2.NewControllerInformation = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V2_ControllerInfo_T), 
-                &Controller->V2.NewControllerInformationDMA);
-
-  Controller->V2.NewLogicalDeviceInformation =  slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V2_LogicalDeviceInfo_T),
-                &Controller->V2.NewLogicalDeviceInformationDMA);
-
-  Controller->V2.NewPhysicalDeviceInformation = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V2_PhysicalDeviceInfo_T),
-                &Controller->V2.NewPhysicalDeviceInformationDMA);
-
-  Controller->V2.NewInquiryUnitSerialNumber = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T),
-                &Controller->V2.NewInquiryUnitSerialNumberDMA);
-
-  Controller->V2.Event = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V2_Event_T),
-                &Controller->V2.EventDMA);
-
-  Controller->V2.PhysicalToLogicalDevice = slice_dma_loaf(DmaPages,
-                sizeof(DAC960_V2_PhysicalToLogicalDevice_T),
-                &Controller->V2.PhysicalToLogicalDeviceDMA);
-
-  /*
-    Enable the Memory Mailbox Interface.
-    
-    I don't know why we can't just use one of the memory mailboxes
-    we just allocated to do this, instead of using this temporary one.
-    Try this change later.
-  */
-  memset(CommandMailbox, 0, sizeof(DAC960_V2_CommandMailbox_T));
-  CommandMailbox->SetMemoryMailbox.CommandIdentifier = 1;
-  CommandMailbox->SetMemoryMailbox.CommandOpcode = DAC960_V2_IOCTL;
-  CommandMailbox->SetMemoryMailbox.CommandControlBits.NoAutoRequestSense = true;
-  CommandMailbox->SetMemoryMailbox.FirstCommandMailboxSizeKB =
-    (DAC960_V2_CommandMailboxCount * sizeof(DAC960_V2_CommandMailbox_T)) >> 10;
-  CommandMailbox->SetMemoryMailbox.FirstStatusMailboxSizeKB =
-    (DAC960_V2_StatusMailboxCount * sizeof(DAC960_V2_StatusMailbox_T)) >> 10;
-  CommandMailbox->SetMemoryMailbox.SecondCommandMailboxSizeKB = 0;
-  CommandMailbox->SetMemoryMailbox.SecondStatusMailboxSizeKB = 0;
-  CommandMailbox->SetMemoryMailbox.RequestSenseSize = 0;
-  CommandMailbox->SetMemoryMailbox.IOCTL_Opcode = DAC960_V2_SetMemoryMailbox;
-  CommandMailbox->SetMemoryMailbox.HealthStatusBufferSizeKB = 1;
-  CommandMailbox->SetMemoryMailbox.HealthStatusBufferBusAddress =
-    					Controller->V2.HealthStatusBufferDMA;
-  CommandMailbox->SetMemoryMailbox.FirstCommandMailboxBusAddress =
-    					Controller->V2.FirstCommandMailboxDMA;
-  CommandMailbox->SetMemoryMailbox.FirstStatusMailboxBusAddress =
-    					Controller->V2.FirstStatusMailboxDMA;
-  switch (Controller->HardwareType)
-    {
-    case DAC960_GEM_Controller:
-      while (DAC960_GEM_HardwareMailboxFullP(ControllerBaseAddress))
-	udelay(1);
-      DAC960_GEM_WriteHardwareMailbox(ControllerBaseAddress, CommandMailboxDMA);
-      DAC960_GEM_HardwareMailboxNewCommand(ControllerBaseAddress);
-      while (!DAC960_GEM_HardwareMailboxStatusAvailableP(ControllerBaseAddress))
-	udelay(1);
-      CommandStatus = DAC960_GEM_ReadCommandStatus(ControllerBaseAddress);
-      DAC960_GEM_AcknowledgeHardwareMailboxInterrupt(ControllerBaseAddress);
-      DAC960_GEM_AcknowledgeHardwareMailboxStatus(ControllerBaseAddress);
-      break;
-    case DAC960_BA_Controller:
-      while (DAC960_BA_HardwareMailboxFullP(ControllerBaseAddress))
-	udelay(1);
-      DAC960_BA_WriteHardwareMailbox(ControllerBaseAddress, CommandMailboxDMA);
-      DAC960_BA_HardwareMailboxNewCommand(ControllerBaseAddress);
-      while (!DAC960_BA_HardwareMailboxStatusAvailableP(ControllerBaseAddress))
-	udelay(1);
-      CommandStatus = DAC960_BA_ReadCommandStatus(ControllerBaseAddress);
-      DAC960_BA_AcknowledgeHardwareMailboxInterrupt(ControllerBaseAddress);
-      DAC960_BA_AcknowledgeHardwareMailboxStatus(ControllerBaseAddress);
-      break;
-    case DAC960_LP_Controller:
-      while (DAC960_LP_HardwareMailboxFullP(ControllerBaseAddress))
-	udelay(1);
-      DAC960_LP_WriteHardwareMailbox(ControllerBaseAddress, CommandMailboxDMA);
-      DAC960_LP_HardwareMailboxNewCommand(ControllerBaseAddress);
-      while (!DAC960_LP_HardwareMailboxStatusAvailableP(ControllerBaseAddress))
-	udelay(1);
-      CommandStatus = DAC960_LP_ReadCommandStatus(ControllerBaseAddress);
-      DAC960_LP_AcknowledgeHardwareMailboxInterrupt(ControllerBaseAddress);
-      DAC960_LP_AcknowledgeHardwareMailboxStatus(ControllerBaseAddress);
-      break;
-    default:
-      DAC960_Failure(Controller, "Unknown Controller Type\n");
-      CommandStatus = DAC960_V2_AbormalCompletion;
-      break;
-    }
-  pci_free_consistent(PCI_Device, sizeof(DAC960_V2_CommandMailbox_T),
-					CommandMailbox, CommandMailboxDMA);
-  return (CommandStatus == DAC960_V2_NormalCompletion);
-}
-
-
-/*
-  DAC960_V1_ReadControllerConfiguration reads the Configuration Information
-  from DAC960 V1 Firmware Controllers and initializes the Controller structure.
-*/
-
-static bool DAC960_V1_ReadControllerConfiguration(DAC960_Controller_T
-						     *Controller)
-{
-  DAC960_V1_Enquiry2_T *Enquiry2;
-  dma_addr_t Enquiry2DMA;
-  DAC960_V1_Config2_T *Config2;
-  dma_addr_t Config2DMA;
-  int LogicalDriveNumber, Channel, TargetID;
-  struct dma_loaf local_dma;
-
-  if (!init_dma_loaf(Controller->PCIDevice, &local_dma,
-		sizeof(DAC960_V1_Enquiry2_T) + sizeof(DAC960_V1_Config2_T)))
-	return DAC960_Failure(Controller, "LOGICAL DEVICE ALLOCATION");
-
-  Enquiry2 = slice_dma_loaf(&local_dma, sizeof(DAC960_V1_Enquiry2_T), &Enquiry2DMA);
-  Config2 = slice_dma_loaf(&local_dma, sizeof(DAC960_V1_Config2_T), &Config2DMA);
-
-  if (!DAC960_V1_ExecuteType3(Controller, DAC960_V1_Enquiry,
-			      Controller->V1.NewEnquiryDMA)) {
-    free_dma_loaf(Controller->PCIDevice, &local_dma);
-    return DAC960_Failure(Controller, "ENQUIRY");
-  }
-  memcpy(&Controller->V1.Enquiry, Controller->V1.NewEnquiry,
-						sizeof(DAC960_V1_Enquiry_T));
-
-  if (!DAC960_V1_ExecuteType3(Controller, DAC960_V1_Enquiry2, Enquiry2DMA)) {
-    free_dma_loaf(Controller->PCIDevice, &local_dma);
-    return DAC960_Failure(Controller, "ENQUIRY2");
-  }
-
-  if (!DAC960_V1_ExecuteType3(Controller, DAC960_V1_ReadConfig2, Config2DMA)) {
-    free_dma_loaf(Controller->PCIDevice, &local_dma);
-    return DAC960_Failure(Controller, "READ CONFIG2");
-  }
-
-  if (!DAC960_V1_ExecuteType3(Controller, DAC960_V1_GetLogicalDriveInformation,
-			      Controller->V1.NewLogicalDriveInformationDMA)) {
-    free_dma_loaf(Controller->PCIDevice, &local_dma);
-    return DAC960_Failure(Controller, "GET LOGICAL DRIVE INFORMATION");
-  }
-  memcpy(&Controller->V1.LogicalDriveInformation,
-		Controller->V1.NewLogicalDriveInformation,
-		sizeof(DAC960_V1_LogicalDriveInformationArray_T));
-
-  for (Channel = 0; Channel < Enquiry2->ActualChannels; Channel++)
-    for (TargetID = 0; TargetID < Enquiry2->MaxTargets; TargetID++) {
-      if (!DAC960_V1_ExecuteType3D(Controller, DAC960_V1_GetDeviceState,
-				   Channel, TargetID,
-				   Controller->V1.NewDeviceStateDMA)) {
-    		free_dma_loaf(Controller->PCIDevice, &local_dma);
-		return DAC960_Failure(Controller, "GET DEVICE STATE");
-	}
-	memcpy(&Controller->V1.DeviceState[Channel][TargetID],
-		Controller->V1.NewDeviceState, sizeof(DAC960_V1_DeviceState_T));
-     }
-  /*
-    Initialize the Controller Model Name and Full Model Name fields.
-  */
-  switch (Enquiry2->HardwareID.SubModel)
-    {
-    case DAC960_V1_P_PD_PU:
-      if (Enquiry2->SCSICapability.BusSpeed == DAC960_V1_Ultra)
-	strcpy(Controller->ModelName, "DAC960PU");
-      else strcpy(Controller->ModelName, "DAC960PD");
-      break;
-    case DAC960_V1_PL:
-      strcpy(Controller->ModelName, "DAC960PL");
-      break;
-    case DAC960_V1_PG:
-      strcpy(Controller->ModelName, "DAC960PG");
-      break;
-    case DAC960_V1_PJ:
-      strcpy(Controller->ModelName, "DAC960PJ");
-      break;
-    case DAC960_V1_PR:
-      strcpy(Controller->ModelName, "DAC960PR");
-      break;
-    case DAC960_V1_PT:
-      strcpy(Controller->ModelName, "DAC960PT");
-      break;
-    case DAC960_V1_PTL0:
-      strcpy(Controller->ModelName, "DAC960PTL0");
-      break;
-    case DAC960_V1_PRL:
-      strcpy(Controller->ModelName, "DAC960PRL");
-      break;
-    case DAC960_V1_PTL1:
-      strcpy(Controller->ModelName, "DAC960PTL1");
-      break;
-    case DAC960_V1_1164P:
-      strcpy(Controller->ModelName, "DAC1164P");
-      break;
-    default:
-      free_dma_loaf(Controller->PCIDevice, &local_dma);
-      return DAC960_Failure(Controller, "MODEL VERIFICATION");
-    }
-  strcpy(Controller->FullModelName, "Mylex ");
-  strcat(Controller->FullModelName, Controller->ModelName);
-  /*
-    Initialize the Controller Firmware Version field and verify that it
-    is a supported firmware version.  The supported firmware versions are:
-
-    DAC1164P		    5.06 and above
-    DAC960PTL/PRL/PJ/PG	    4.06 and above
-    DAC960PU/PD/PL	    3.51 and above
-    DAC960PU/PD/PL/P	    2.73 and above
-  */
-#if defined(CONFIG_ALPHA)
-  /*
-    DEC Alpha machines were often equipped with DAC960 cards that were
-    OEMed from Mylex, and had their own custom firmware. Version 2.70,
-    the last custom FW revision to be released by DEC for these older
-    controllers, appears to work quite well with this driver.
-
-    Cards tested successfully were several versions each of the PD and
-    PU, called by DEC the KZPSC and KZPAC, respectively, and having
-    the Manufacturer Numbers (from Mylex), usually on a sticker on the
-    back of the board, of:
-
-    KZPSC:  D040347 (1-channel) or D040348 (2-channel) or D040349 (3-channel)
-    KZPAC:  D040395 (1-channel) or D040396 (2-channel) or D040397 (3-channel)
-  */
-# define FIRMWARE_27X	"2.70"
-#else
-# define FIRMWARE_27X	"2.73"
-#endif
-
-  if (Enquiry2->FirmwareID.MajorVersion == 0)
-    {
-      Enquiry2->FirmwareID.MajorVersion =
-	Controller->V1.Enquiry.MajorFirmwareVersion;
-      Enquiry2->FirmwareID.MinorVersion =
-	Controller->V1.Enquiry.MinorFirmwareVersion;
-      Enquiry2->FirmwareID.FirmwareType = '0';
-      Enquiry2->FirmwareID.TurnID = 0;
-    }
-  snprintf(Controller->FirmwareVersion, sizeof(Controller->FirmwareVersion),
-	   "%d.%02d-%c-%02d",
-	   Enquiry2->FirmwareID.MajorVersion,
-	   Enquiry2->FirmwareID.MinorVersion,
-	   Enquiry2->FirmwareID.FirmwareType,
-	   Enquiry2->FirmwareID.TurnID);
-  if (!((Controller->FirmwareVersion[0] == '5' &&
-	 strcmp(Controller->FirmwareVersion, "5.06") >= 0) ||
-	(Controller->FirmwareVersion[0] == '4' &&
-	 strcmp(Controller->FirmwareVersion, "4.06") >= 0) ||
-	(Controller->FirmwareVersion[0] == '3' &&
-	 strcmp(Controller->FirmwareVersion, "3.51") >= 0) ||
-	(Controller->FirmwareVersion[0] == '2' &&
-	 strcmp(Controller->FirmwareVersion, FIRMWARE_27X) >= 0)))
-    {
-      DAC960_Failure(Controller, "FIRMWARE VERSION VERIFICATION");
-      DAC960_Error("Firmware Version = '%s'\n", Controller,
-		   Controller->FirmwareVersion);
-      free_dma_loaf(Controller->PCIDevice, &local_dma);
-      return false;
-    }
-  /*
-    Initialize the Controller Channels, Targets, Memory Size, and SAF-TE
-    Enclosure Management Enabled fields.
-  */
-  Controller->Channels = Enquiry2->ActualChannels;
-  Controller->Targets = Enquiry2->MaxTargets;
-  Controller->MemorySize = Enquiry2->MemorySize >> 20;
-  Controller->V1.SAFTE_EnclosureManagementEnabled =
-    (Enquiry2->FaultManagementType == DAC960_V1_SAFTE);
-  /*
-    Initialize the Controller Queue Depth, Driver Queue Depth, Logical Drive
-    Count, Maximum Blocks per Command, Controller Scatter/Gather Limit, and
-    Driver Scatter/Gather Limit.  The Driver Queue Depth must be at most one
-    less than the Controller Queue Depth to allow for an automatic drive
-    rebuild operation.
-  */
-  Controller->ControllerQueueDepth = Controller->V1.Enquiry.MaxCommands;
-  Controller->DriverQueueDepth = Controller->ControllerQueueDepth - 1;
-  if (Controller->DriverQueueDepth > DAC960_MaxDriverQueueDepth)
-    Controller->DriverQueueDepth = DAC960_MaxDriverQueueDepth;
-  Controller->LogicalDriveCount =
-    Controller->V1.Enquiry.NumberOfLogicalDrives;
-  Controller->MaxBlocksPerCommand = Enquiry2->MaxBlocksPerCommand;
-  Controller->ControllerScatterGatherLimit = Enquiry2->MaxScatterGatherEntries;
-  Controller->DriverScatterGatherLimit =
-    Controller->ControllerScatterGatherLimit;
-  if (Controller->DriverScatterGatherLimit > DAC960_V1_ScatterGatherLimit)
-    Controller->DriverScatterGatherLimit = DAC960_V1_ScatterGatherLimit;
-  /*
-    Initialize the Stripe Size, Segment Size, and Geometry Translation.
-  */
-  Controller->V1.StripeSize = Config2->BlocksPerStripe * Config2->BlockFactor
-			      >> (10 - DAC960_BlockSizeBits);
-  Controller->V1.SegmentSize = Config2->BlocksPerCacheLine * Config2->BlockFactor
-			       >> (10 - DAC960_BlockSizeBits);
-  switch (Config2->DriveGeometry)
-    {
-    case DAC960_V1_Geometry_128_32:
-      Controller->V1.GeometryTranslationHeads = 128;
-      Controller->V1.GeometryTranslationSectors = 32;
-      break;
-    case DAC960_V1_Geometry_255_63:
-      Controller->V1.GeometryTranslationHeads = 255;
-      Controller->V1.GeometryTranslationSectors = 63;
-      break;
-    default:
-      free_dma_loaf(Controller->PCIDevice, &local_dma);
-      return DAC960_Failure(Controller, "CONFIG2 DRIVE GEOMETRY");
-    }
-  /*
-    Initialize the Background Initialization Status.
-  */
-  if ((Controller->FirmwareVersion[0] == '4' &&
-      strcmp(Controller->FirmwareVersion, "4.08") >= 0) ||
-      (Controller->FirmwareVersion[0] == '5' &&
-       strcmp(Controller->FirmwareVersion, "5.08") >= 0))
-    {
-      Controller->V1.BackgroundInitializationStatusSupported = true;
-      DAC960_V1_ExecuteType3B(Controller,
-			      DAC960_V1_BackgroundInitializationControl, 0x20,
-			      Controller->
-			       V1.BackgroundInitializationStatusDMA);
-      memcpy(&Controller->V1.LastBackgroundInitializationStatus,
-		Controller->V1.BackgroundInitializationStatus,
-		sizeof(DAC960_V1_BackgroundInitializationStatus_T));
-    }
-  /*
-    Initialize the Logical Drive Initially Accessible flag.
-  */
-  for (LogicalDriveNumber = 0;
-       LogicalDriveNumber < Controller->LogicalDriveCount;
-       LogicalDriveNumber++)
-    if (Controller->V1.LogicalDriveInformation
-		       [LogicalDriveNumber].LogicalDriveState !=
-	DAC960_V1_LogicalDrive_Offline)
-      Controller->LogicalDriveInitiallyAccessible[LogicalDriveNumber] = true;
-  Controller->V1.LastRebuildStatus = DAC960_V1_NoRebuildOrCheckInProgress;
-  free_dma_loaf(Controller->PCIDevice, &local_dma);
-  return true;
-}
-
-
-/*
-  DAC960_V2_ReadControllerConfiguration reads the Configuration Information
-  from DAC960 V2 Firmware Controllers and initializes the Controller structure.
-*/
-
-static bool DAC960_V2_ReadControllerConfiguration(DAC960_Controller_T
-						     *Controller)
-{
-  DAC960_V2_ControllerInfo_T *ControllerInfo =
-    		&Controller->V2.ControllerInformation;
-  unsigned short LogicalDeviceNumber = 0;
-  int ModelNameLength;
-
-  /* Get data into dma-able area, then copy into permanent location */
-  if (!DAC960_V2_NewControllerInfo(Controller))
-    return DAC960_Failure(Controller, "GET CONTROLLER INFO");
-  memcpy(ControllerInfo, Controller->V2.NewControllerInformation,
-			sizeof(DAC960_V2_ControllerInfo_T));
-	 
-  
-  if (!DAC960_V2_GeneralInfo(Controller))
-    return DAC960_Failure(Controller, "GET HEALTH STATUS");
-
-  /*
-    Initialize the Controller Model Name and Full Model Name fields.
-  */
-  ModelNameLength = sizeof(ControllerInfo->ControllerName);
-  if (ModelNameLength > sizeof(Controller->ModelName)-1)
-    ModelNameLength = sizeof(Controller->ModelName)-1;
-  memcpy(Controller->ModelName, ControllerInfo->ControllerName,
-	 ModelNameLength);
-  ModelNameLength--;
-  while (Controller->ModelName[ModelNameLength] == ' ' ||
-	 Controller->ModelName[ModelNameLength] == '\0')
-    ModelNameLength--;
-  Controller->ModelName[++ModelNameLength] = '\0';
-  strcpy(Controller->FullModelName, "Mylex ");
-  strcat(Controller->FullModelName, Controller->ModelName);
-  /*
-    Initialize the Controller Firmware Version field.
-  */
-  sprintf(Controller->FirmwareVersion, "%d.%02d-%02d",
-	  ControllerInfo->FirmwareMajorVersion,
-	  ControllerInfo->FirmwareMinorVersion,
-	  ControllerInfo->FirmwareTurnNumber);
-  if (ControllerInfo->FirmwareMajorVersion == 6 &&
-      ControllerInfo->FirmwareMinorVersion == 0 &&
-      ControllerInfo->FirmwareTurnNumber < 1)
-    {
-      DAC960_Info("FIRMWARE VERSION %s DOES NOT PROVIDE THE CONTROLLER\n",
-		  Controller, Controller->FirmwareVersion);
-      DAC960_Info("STATUS MONITORING FUNCTIONALITY NEEDED BY THIS DRIVER.\n",
-		  Controller);
-      DAC960_Info("PLEASE UPGRADE TO VERSION 6.00-01 OR ABOVE.\n",
-		  Controller);
-    }
-  /*
-    Initialize the Controller Channels, Targets, and Memory Size.
-  */
-  Controller->Channels = ControllerInfo->NumberOfPhysicalChannelsPresent;
-  Controller->Targets =
-    ControllerInfo->MaximumTargetsPerChannel
-		    [ControllerInfo->NumberOfPhysicalChannelsPresent-1];
-  Controller->MemorySize = ControllerInfo->MemorySizeMB;
-  /*
-    Initialize the Controller Queue Depth, Driver Queue Depth, Logical Drive
-    Count, Maximum Blocks per Command, Controller Scatter/Gather Limit, and
-    Driver Scatter/Gather Limit.  The Driver Queue Depth must be at most one
-    less than the Controller Queue Depth to allow for an automatic drive
-    rebuild operation.
-  */
-  Controller->ControllerQueueDepth = ControllerInfo->MaximumParallelCommands;
-  Controller->DriverQueueDepth = Controller->ControllerQueueDepth - 1;
-  if (Controller->DriverQueueDepth > DAC960_MaxDriverQueueDepth)
-    Controller->DriverQueueDepth = DAC960_MaxDriverQueueDepth;
-  Controller->LogicalDriveCount = ControllerInfo->LogicalDevicesPresent;
-  Controller->MaxBlocksPerCommand =
-    ControllerInfo->MaximumDataTransferSizeInBlocks;
-  Controller->ControllerScatterGatherLimit =
-    ControllerInfo->MaximumScatterGatherEntries;
-  Controller->DriverScatterGatherLimit =
-    Controller->ControllerScatterGatherLimit;
-  if (Controller->DriverScatterGatherLimit > DAC960_V2_ScatterGatherLimit)
-    Controller->DriverScatterGatherLimit = DAC960_V2_ScatterGatherLimit;
-  /*
-    Initialize the Logical Device Information.
-  */
-  while (true)
-    {
-      DAC960_V2_LogicalDeviceInfo_T *NewLogicalDeviceInfo =
-	Controller->V2.NewLogicalDeviceInformation;
-      DAC960_V2_LogicalDeviceInfo_T *LogicalDeviceInfo;
-      DAC960_V2_PhysicalDevice_T PhysicalDevice;
-
-      if (!DAC960_V2_NewLogicalDeviceInfo(Controller, LogicalDeviceNumber))
-	break;
-      LogicalDeviceNumber = NewLogicalDeviceInfo->LogicalDeviceNumber;
-      if (LogicalDeviceNumber >= DAC960_MaxLogicalDrives) {
-	DAC960_Error("DAC960: Logical Drive Number %d not supported\n",
-		       Controller, LogicalDeviceNumber);
-		break;
-      }
-      if (NewLogicalDeviceInfo->DeviceBlockSizeInBytes != DAC960_BlockSize) {
-	DAC960_Error("DAC960: Logical Drive Block Size %d not supported\n",
-	      Controller, NewLogicalDeviceInfo->DeviceBlockSizeInBytes);
-        LogicalDeviceNumber++;
-        continue;
-      }
-      PhysicalDevice.Controller = 0;
-      PhysicalDevice.Channel = NewLogicalDeviceInfo->Channel;
-      PhysicalDevice.TargetID = NewLogicalDeviceInfo->TargetID;
-      PhysicalDevice.LogicalUnit = NewLogicalDeviceInfo->LogicalUnit;
-      Controller->V2.LogicalDriveToVirtualDevice[LogicalDeviceNumber] =
-	PhysicalDevice;
-      if (NewLogicalDeviceInfo->LogicalDeviceState !=
-	  DAC960_V2_LogicalDevice_Offline)
-	Controller->LogicalDriveInitiallyAccessible[LogicalDeviceNumber] = true;
-      LogicalDeviceInfo = kmalloc(sizeof(DAC960_V2_LogicalDeviceInfo_T),
-				   GFP_ATOMIC);
-      if (LogicalDeviceInfo == NULL)
-	return DAC960_Failure(Controller, "LOGICAL DEVICE ALLOCATION");
-      Controller->V2.LogicalDeviceInformation[LogicalDeviceNumber] =
-	LogicalDeviceInfo;
-      memcpy(LogicalDeviceInfo, NewLogicalDeviceInfo,
-	     sizeof(DAC960_V2_LogicalDeviceInfo_T));
-      LogicalDeviceNumber++;
-    }
-  return true;
-}
-
-
-/*
-  DAC960_ReportControllerConfiguration reports the Configuration Information
-  for Controller.
-*/
-
-static bool DAC960_ReportControllerConfiguration(DAC960_Controller_T
-						    *Controller)
-{
-  DAC960_Info("Configuring Mylex %s PCI RAID Controller\n",
-	      Controller, Controller->ModelName);
-  DAC960_Info("  Firmware Version: %s, Channels: %d, Memory Size: %dMB\n",
-	      Controller, Controller->FirmwareVersion,
-	      Controller->Channels, Controller->MemorySize);
-  DAC960_Info("  PCI Bus: %d, Device: %d, Function: %d, I/O Address: ",
-	      Controller, Controller->Bus,
-	      Controller->Device, Controller->Function);
-  if (Controller->IO_Address == 0)
-    DAC960_Info("Unassigned\n", Controller);
-  else DAC960_Info("0x%X\n", Controller, Controller->IO_Address);
-  DAC960_Info("  PCI Address: 0x%X mapped at 0x%lX, IRQ Channel: %d\n",
-	      Controller, Controller->PCI_Address,
-	      (unsigned long) Controller->BaseAddress,
-	      Controller->IRQ_Channel);
-  DAC960_Info("  Controller Queue Depth: %d, "
-	      "Maximum Blocks per Command: %d\n",
-	      Controller, Controller->ControllerQueueDepth,
-	      Controller->MaxBlocksPerCommand);
-  DAC960_Info("  Driver Queue Depth: %d, "
-	      "Scatter/Gather Limit: %d of %d Segments\n",
-	      Controller, Controller->DriverQueueDepth,
-	      Controller->DriverScatterGatherLimit,
-	      Controller->ControllerScatterGatherLimit);
-  if (Controller->FirmwareType == DAC960_V1_Controller)
-    {
-      DAC960_Info("  Stripe Size: %dKB, Segment Size: %dKB, "
-		  "BIOS Geometry: %d/%d\n", Controller,
-		  Controller->V1.StripeSize,
-		  Controller->V1.SegmentSize,
-		  Controller->V1.GeometryTranslationHeads,
-		  Controller->V1.GeometryTranslationSectors);
-      if (Controller->V1.SAFTE_EnclosureManagementEnabled)
-	DAC960_Info("  SAF-TE Enclosure Management Enabled\n", Controller);
-    }
-  return true;
-}
-
-
-/*
-  DAC960_V1_ReadDeviceConfiguration reads the Device Configuration Information
-  for DAC960 V1 Firmware Controllers by requesting the SCSI Inquiry and SCSI
-  Inquiry Unit Serial Number information for each device connected to
-  Controller.
-*/
-
-static bool DAC960_V1_ReadDeviceConfiguration(DAC960_Controller_T
-						 *Controller)
-{
-  struct dma_loaf local_dma;
-
-  dma_addr_t DCDBs_dma[DAC960_V1_MaxChannels];
-  DAC960_V1_DCDB_T *DCDBs_cpu[DAC960_V1_MaxChannels];
-
-  dma_addr_t SCSI_Inquiry_dma[DAC960_V1_MaxChannels];
-  DAC960_SCSI_Inquiry_T *SCSI_Inquiry_cpu[DAC960_V1_MaxChannels];
-
-  dma_addr_t SCSI_NewInquiryUnitSerialNumberDMA[DAC960_V1_MaxChannels];
-  DAC960_SCSI_Inquiry_UnitSerialNumber_T *SCSI_NewInquiryUnitSerialNumberCPU[DAC960_V1_MaxChannels];
-
-  struct completion Completions[DAC960_V1_MaxChannels];
-  unsigned long flags;
-  int Channel, TargetID;
-
-  if (!init_dma_loaf(Controller->PCIDevice, &local_dma, 
-		DAC960_V1_MaxChannels*(sizeof(DAC960_V1_DCDB_T) +
-			sizeof(DAC960_SCSI_Inquiry_T) +
-			sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T))))
-     return DAC960_Failure(Controller,
-                        "DMA ALLOCATION FAILED IN ReadDeviceConfiguration"); 
-   
-  for (Channel = 0; Channel < Controller->Channels; Channel++) {
-	DCDBs_cpu[Channel] = slice_dma_loaf(&local_dma,
-			sizeof(DAC960_V1_DCDB_T), DCDBs_dma + Channel);
-	SCSI_Inquiry_cpu[Channel] = slice_dma_loaf(&local_dma,
-			sizeof(DAC960_SCSI_Inquiry_T),
-			SCSI_Inquiry_dma + Channel);
-	SCSI_NewInquiryUnitSerialNumberCPU[Channel] = slice_dma_loaf(&local_dma,
-			sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T),
-			SCSI_NewInquiryUnitSerialNumberDMA + Channel);
-  }
-		
-  for (TargetID = 0; TargetID < Controller->Targets; TargetID++)
-    {
-      /*
-       * For each channel, submit a probe for a device on that channel.
-       * The timeout interval for a device that is present is 10 seconds.
-       * With this approach, the timeout periods can elapse in parallel
-       * on each channel.
-       */
-      for (Channel = 0; Channel < Controller->Channels; Channel++)
-	{
-	  dma_addr_t NewInquiryStandardDataDMA = SCSI_Inquiry_dma[Channel];
-  	  DAC960_V1_DCDB_T *DCDB = DCDBs_cpu[Channel];
-  	  dma_addr_t DCDB_dma = DCDBs_dma[Channel];
-	  DAC960_Command_T *Command = Controller->Commands[Channel];
-          struct completion *Completion = &Completions[Channel];
-
-	  init_completion(Completion);
-	  DAC960_V1_ClearCommand(Command);
-	  Command->CommandType = DAC960_ImmediateCommand;
-	  Command->Completion = Completion;
-	  Command->V1.CommandMailbox.Type3.CommandOpcode = DAC960_V1_DCDB;
-	  Command->V1.CommandMailbox.Type3.BusAddress = DCDB_dma;
-	  DCDB->Channel = Channel;
-	  DCDB->TargetID = TargetID;
-	  DCDB->Direction = DAC960_V1_DCDB_DataTransferDeviceToSystem;
-	  DCDB->EarlyStatus = false;
-	  DCDB->Timeout = DAC960_V1_DCDB_Timeout_10_seconds;
-	  DCDB->NoAutomaticRequestSense = false;
-	  DCDB->DisconnectPermitted = true;
-	  DCDB->TransferLength = sizeof(DAC960_SCSI_Inquiry_T);
-	  DCDB->BusAddress = NewInquiryStandardDataDMA;
-	  DCDB->CDBLength = 6;
-	  DCDB->TransferLengthHigh4 = 0;
-	  DCDB->SenseLength = sizeof(DCDB->SenseData);
-	  DCDB->CDB[0] = 0x12; /* INQUIRY */
-	  DCDB->CDB[1] = 0; /* EVPD = 0 */
-	  DCDB->CDB[2] = 0; /* Page Code */
-	  DCDB->CDB[3] = 0; /* Reserved */
-	  DCDB->CDB[4] = sizeof(DAC960_SCSI_Inquiry_T);
-	  DCDB->CDB[5] = 0; /* Control */
-
-	  spin_lock_irqsave(&Controller->queue_lock, flags);
-	  DAC960_QueueCommand(Command);
-	  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-	}
-      /*
-       * Wait for the problems submitted in the previous loop
-       * to complete.  On the probes that are successful, 
-       * get the serial number of the device that was found.
-       */
-      for (Channel = 0; Channel < Controller->Channels; Channel++)
-	{
-	  DAC960_SCSI_Inquiry_T *InquiryStandardData =
-	    &Controller->V1.InquiryStandardData[Channel][TargetID];
-	  DAC960_SCSI_Inquiry_T *NewInquiryStandardData = SCSI_Inquiry_cpu[Channel];
-	  dma_addr_t NewInquiryUnitSerialNumberDMA =
-			SCSI_NewInquiryUnitSerialNumberDMA[Channel];
-	  DAC960_SCSI_Inquiry_UnitSerialNumber_T *NewInquiryUnitSerialNumber =
-	    		SCSI_NewInquiryUnitSerialNumberCPU[Channel];
-	  DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
-	    &Controller->V1.InquiryUnitSerialNumber[Channel][TargetID];
-	  DAC960_Command_T *Command = Controller->Commands[Channel];
-  	  DAC960_V1_DCDB_T *DCDB = DCDBs_cpu[Channel];
-          struct completion *Completion = &Completions[Channel];
-
-	  wait_for_completion(Completion);
-
-	  if (Command->V1.CommandStatus != DAC960_V1_NormalCompletion) {
-	    memset(InquiryStandardData, 0, sizeof(DAC960_SCSI_Inquiry_T));
-	    InquiryStandardData->PeripheralDeviceType = 0x1F;
-	    continue;
-	  } else
-	    memcpy(InquiryStandardData, NewInquiryStandardData, sizeof(DAC960_SCSI_Inquiry_T));
-	
-	  /* Preserve Channel and TargetID values from the previous loop */
-	  Command->Completion = Completion;
-	  DCDB->TransferLength = sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
-	  DCDB->BusAddress = NewInquiryUnitSerialNumberDMA;
-	  DCDB->SenseLength = sizeof(DCDB->SenseData);
-	  DCDB->CDB[0] = 0x12; /* INQUIRY */
-	  DCDB->CDB[1] = 1; /* EVPD = 1 */
-	  DCDB->CDB[2] = 0x80; /* Page Code */
-	  DCDB->CDB[3] = 0; /* Reserved */
-	  DCDB->CDB[4] = sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
-	  DCDB->CDB[5] = 0; /* Control */
-
-	  spin_lock_irqsave(&Controller->queue_lock, flags);
-	  DAC960_QueueCommand(Command);
-	  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-	  wait_for_completion(Completion);
-
-	  if (Command->V1.CommandStatus != DAC960_V1_NormalCompletion) {
-	  	memset(InquiryUnitSerialNumber, 0,
-			sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
-	  	InquiryUnitSerialNumber->PeripheralDeviceType = 0x1F;
-	  } else
-	  	memcpy(InquiryUnitSerialNumber, NewInquiryUnitSerialNumber,
-			sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
-	}
-    }
-    free_dma_loaf(Controller->PCIDevice, &local_dma);
-  return true;
-}
-
-
-/*
-  DAC960_V2_ReadDeviceConfiguration reads the Device Configuration Information
-  for DAC960 V2 Firmware Controllers by requesting the Physical Device
-  Information and SCSI Inquiry Unit Serial Number information for each
-  device connected to Controller.
-*/
-
-static bool DAC960_V2_ReadDeviceConfiguration(DAC960_Controller_T
-						 *Controller)
-{
-  unsigned char Channel = 0, TargetID = 0, LogicalUnit = 0;
-  unsigned short PhysicalDeviceIndex = 0;
-
-  while (true)
-    {
-      DAC960_V2_PhysicalDeviceInfo_T *NewPhysicalDeviceInfo =
-		Controller->V2.NewPhysicalDeviceInformation;
-      DAC960_V2_PhysicalDeviceInfo_T *PhysicalDeviceInfo;
-      DAC960_SCSI_Inquiry_UnitSerialNumber_T *NewInquiryUnitSerialNumber =
-		Controller->V2.NewInquiryUnitSerialNumber;
-      DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber;
-
-      if (!DAC960_V2_NewPhysicalDeviceInfo(Controller, Channel, TargetID, LogicalUnit))
-	  break;
-
-      PhysicalDeviceInfo = kmalloc(sizeof(DAC960_V2_PhysicalDeviceInfo_T),
-				    GFP_ATOMIC);
-      if (PhysicalDeviceInfo == NULL)
-		return DAC960_Failure(Controller, "PHYSICAL DEVICE ALLOCATION");
-      Controller->V2.PhysicalDeviceInformation[PhysicalDeviceIndex] =
-		PhysicalDeviceInfo;
-      memcpy(PhysicalDeviceInfo, NewPhysicalDeviceInfo,
-		sizeof(DAC960_V2_PhysicalDeviceInfo_T));
-
-      InquiryUnitSerialNumber = kmalloc(
-	      sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T), GFP_ATOMIC);
-      if (InquiryUnitSerialNumber == NULL) {
-	kfree(PhysicalDeviceInfo);
-	return DAC960_Failure(Controller, "SERIAL NUMBER ALLOCATION");
-      }
-      Controller->V2.InquiryUnitSerialNumber[PhysicalDeviceIndex] =
-		InquiryUnitSerialNumber;
-
-      Channel = NewPhysicalDeviceInfo->Channel;
-      TargetID = NewPhysicalDeviceInfo->TargetID;
-      LogicalUnit = NewPhysicalDeviceInfo->LogicalUnit;
-
-      /*
-	 Some devices do NOT have Unit Serial Numbers.
-	 This command fails for them.  But, we still want to
-	 remember those devices are there.  Construct a
-	 UnitSerialNumber structure for the failure case.
-      */
-      if (!DAC960_V2_NewInquiryUnitSerialNumber(Controller, Channel, TargetID, LogicalUnit)) {
-      	memset(InquiryUnitSerialNumber, 0,
-             sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
-     	InquiryUnitSerialNumber->PeripheralDeviceType = 0x1F;
-      } else
-      	memcpy(InquiryUnitSerialNumber, NewInquiryUnitSerialNumber,
-		sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
-
-      PhysicalDeviceIndex++;
-      LogicalUnit++;
-    }
-  return true;
-}
-
-
-/*
-  DAC960_SanitizeInquiryData sanitizes the Vendor, Model, Revision, and
-  Product Serial Number fields of the Inquiry Standard Data and Inquiry
-  Unit Serial Number structures.
-*/
-
-static void DAC960_SanitizeInquiryData(DAC960_SCSI_Inquiry_T
-					 *InquiryStandardData,
-				       DAC960_SCSI_Inquiry_UnitSerialNumber_T
-					 *InquiryUnitSerialNumber,
-				       unsigned char *Vendor,
-				       unsigned char *Model,
-				       unsigned char *Revision,
-				       unsigned char *SerialNumber)
-{
-  int SerialNumberLength, i;
-  if (InquiryStandardData->PeripheralDeviceType == 0x1F) return;
-  for (i = 0; i < sizeof(InquiryStandardData->VendorIdentification); i++)
-    {
-      unsigned char VendorCharacter =
-	InquiryStandardData->VendorIdentification[i];
-      Vendor[i] = (VendorCharacter >= ' ' && VendorCharacter <= '~'
-		   ? VendorCharacter : ' ');
-    }
-  Vendor[sizeof(InquiryStandardData->VendorIdentification)] = '\0';
-  for (i = 0; i < sizeof(InquiryStandardData->ProductIdentification); i++)
-    {
-      unsigned char ModelCharacter =
-	InquiryStandardData->ProductIdentification[i];
-      Model[i] = (ModelCharacter >= ' ' && ModelCharacter <= '~'
-		  ? ModelCharacter : ' ');
-    }
-  Model[sizeof(InquiryStandardData->ProductIdentification)] = '\0';
-  for (i = 0; i < sizeof(InquiryStandardData->ProductRevisionLevel); i++)
-    {
-      unsigned char RevisionCharacter =
-	InquiryStandardData->ProductRevisionLevel[i];
-      Revision[i] = (RevisionCharacter >= ' ' && RevisionCharacter <= '~'
-		     ? RevisionCharacter : ' ');
-    }
-  Revision[sizeof(InquiryStandardData->ProductRevisionLevel)] = '\0';
-  if (InquiryUnitSerialNumber->PeripheralDeviceType == 0x1F) return;
-  SerialNumberLength = InquiryUnitSerialNumber->PageLength;
-  if (SerialNumberLength >
-      sizeof(InquiryUnitSerialNumber->ProductSerialNumber))
-    SerialNumberLength = sizeof(InquiryUnitSerialNumber->ProductSerialNumber);
-  for (i = 0; i < SerialNumberLength; i++)
-    {
-      unsigned char SerialNumberCharacter =
-	InquiryUnitSerialNumber->ProductSerialNumber[i];
-      SerialNumber[i] =
-	(SerialNumberCharacter >= ' ' && SerialNumberCharacter <= '~'
-	 ? SerialNumberCharacter : ' ');
-    }
-  SerialNumber[SerialNumberLength] = '\0';
-}
-
-
-/*
-  DAC960_V1_ReportDeviceConfiguration reports the Device Configuration
-  Information for DAC960 V1 Firmware Controllers.
-*/
-
-static bool DAC960_V1_ReportDeviceConfiguration(DAC960_Controller_T
-						   *Controller)
-{
-  int LogicalDriveNumber, Channel, TargetID;
-  DAC960_Info("  Physical Devices:\n", Controller);
-  for (Channel = 0; Channel < Controller->Channels; Channel++)
-    for (TargetID = 0; TargetID < Controller->Targets; TargetID++)
-      {
-	DAC960_SCSI_Inquiry_T *InquiryStandardData =
-	  &Controller->V1.InquiryStandardData[Channel][TargetID];
-	DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
-	  &Controller->V1.InquiryUnitSerialNumber[Channel][TargetID];
-	DAC960_V1_DeviceState_T *DeviceState =
-	  &Controller->V1.DeviceState[Channel][TargetID];
-	DAC960_V1_ErrorTableEntry_T *ErrorEntry =
-	  &Controller->V1.ErrorTable.ErrorTableEntries[Channel][TargetID];
-	char Vendor[1+sizeof(InquiryStandardData->VendorIdentification)];
-	char Model[1+sizeof(InquiryStandardData->ProductIdentification)];
-	char Revision[1+sizeof(InquiryStandardData->ProductRevisionLevel)];
-	char SerialNumber[1+sizeof(InquiryUnitSerialNumber
-				   ->ProductSerialNumber)];
-	if (InquiryStandardData->PeripheralDeviceType == 0x1F) continue;
-	DAC960_SanitizeInquiryData(InquiryStandardData, InquiryUnitSerialNumber,
-				   Vendor, Model, Revision, SerialNumber);
-	DAC960_Info("    %d:%d%s Vendor: %s  Model: %s  Revision: %s\n",
-		    Controller, Channel, TargetID, (TargetID < 10 ? " " : ""),
-		    Vendor, Model, Revision);
-	if (InquiryUnitSerialNumber->PeripheralDeviceType != 0x1F)
-	  DAC960_Info("         Serial Number: %s\n", Controller, SerialNumber);
-	if (DeviceState->Present &&
-	    DeviceState->DeviceType == DAC960_V1_DiskType)
-	  {
-	    if (Controller->V1.DeviceResetCount[Channel][TargetID] > 0)
-	      DAC960_Info("         Disk Status: %s, %u blocks, %d resets\n",
-			  Controller,
-			  (DeviceState->DeviceState == DAC960_V1_Device_Dead
-			   ? "Dead"
-			   : DeviceState->DeviceState
-			     == DAC960_V1_Device_WriteOnly
-			     ? "Write-Only"
-			     : DeviceState->DeviceState
-			       == DAC960_V1_Device_Online
-			       ? "Online" : "Standby"),
-			  DeviceState->DiskSize,
-			  Controller->V1.DeviceResetCount[Channel][TargetID]);
-	    else
-	      DAC960_Info("         Disk Status: %s, %u blocks\n", Controller,
-			  (DeviceState->DeviceState == DAC960_V1_Device_Dead
-			   ? "Dead"
-			   : DeviceState->DeviceState
-			     == DAC960_V1_Device_WriteOnly
-			     ? "Write-Only"
-			     : DeviceState->DeviceState
-			       == DAC960_V1_Device_Online
-			       ? "Online" : "Standby"),
-			  DeviceState->DiskSize);
-	  }
-	if (ErrorEntry->ParityErrorCount > 0 ||
-	    ErrorEntry->SoftErrorCount > 0 ||
-	    ErrorEntry->HardErrorCount > 0 ||
-	    ErrorEntry->MiscErrorCount > 0)
-	  DAC960_Info("         Errors - Parity: %d, Soft: %d, "
-		      "Hard: %d, Misc: %d\n", Controller,
-		      ErrorEntry->ParityErrorCount,
-		      ErrorEntry->SoftErrorCount,
-		      ErrorEntry->HardErrorCount,
-		      ErrorEntry->MiscErrorCount);
-      }
-  DAC960_Info("  Logical Drives:\n", Controller);
-  for (LogicalDriveNumber = 0;
-       LogicalDriveNumber < Controller->LogicalDriveCount;
-       LogicalDriveNumber++)
-    {
-      DAC960_V1_LogicalDriveInformation_T *LogicalDriveInformation =
-	&Controller->V1.LogicalDriveInformation[LogicalDriveNumber];
-      DAC960_Info("    /dev/rd/c%dd%d: RAID-%d, %s, %u blocks, %s\n",
-		  Controller, Controller->ControllerNumber, LogicalDriveNumber,
-		  LogicalDriveInformation->RAIDLevel,
-		  (LogicalDriveInformation->LogicalDriveState
-		   == DAC960_V1_LogicalDrive_Online
-		   ? "Online"
-		   : LogicalDriveInformation->LogicalDriveState
-		     == DAC960_V1_LogicalDrive_Critical
-		     ? "Critical" : "Offline"),
-		  LogicalDriveInformation->LogicalDriveSize,
-		  (LogicalDriveInformation->WriteBack
-		   ? "Write Back" : "Write Thru"));
-    }
-  return true;
-}
-
-
-/*
-  DAC960_V2_ReportDeviceConfiguration reports the Device Configuration
-  Information for DAC960 V2 Firmware Controllers.
-*/
-
-static bool DAC960_V2_ReportDeviceConfiguration(DAC960_Controller_T
-						   *Controller)
-{
-  int PhysicalDeviceIndex, LogicalDriveNumber;
-  DAC960_Info("  Physical Devices:\n", Controller);
-  for (PhysicalDeviceIndex = 0;
-       PhysicalDeviceIndex < DAC960_V2_MaxPhysicalDevices;
-       PhysicalDeviceIndex++)
-    {
-      DAC960_V2_PhysicalDeviceInfo_T *PhysicalDeviceInfo =
-	Controller->V2.PhysicalDeviceInformation[PhysicalDeviceIndex];
-      DAC960_SCSI_Inquiry_T *InquiryStandardData =
-	(DAC960_SCSI_Inquiry_T *) &PhysicalDeviceInfo->SCSI_InquiryData;
-      DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
-	Controller->V2.InquiryUnitSerialNumber[PhysicalDeviceIndex];
-      char Vendor[1+sizeof(InquiryStandardData->VendorIdentification)];
-      char Model[1+sizeof(InquiryStandardData->ProductIdentification)];
-      char Revision[1+sizeof(InquiryStandardData->ProductRevisionLevel)];
-      char SerialNumber[1+sizeof(InquiryUnitSerialNumber->ProductSerialNumber)];
-      if (PhysicalDeviceInfo == NULL) break;
-      DAC960_SanitizeInquiryData(InquiryStandardData, InquiryUnitSerialNumber,
-				 Vendor, Model, Revision, SerialNumber);
-      DAC960_Info("    %d:%d%s Vendor: %s  Model: %s  Revision: %s\n",
-		  Controller,
-		  PhysicalDeviceInfo->Channel,
-		  PhysicalDeviceInfo->TargetID,
-		  (PhysicalDeviceInfo->TargetID < 10 ? " " : ""),
-		  Vendor, Model, Revision);
-      if (PhysicalDeviceInfo->NegotiatedSynchronousMegaTransfers == 0)
-	DAC960_Info("         %sAsynchronous\n", Controller,
-		    (PhysicalDeviceInfo->NegotiatedDataWidthBits == 16
-		     ? "Wide " :""));
-      else
-	DAC960_Info("         %sSynchronous at %d MB/sec\n", Controller,
-		    (PhysicalDeviceInfo->NegotiatedDataWidthBits == 16
-		     ? "Wide " :""),
-		    (PhysicalDeviceInfo->NegotiatedSynchronousMegaTransfers
-		     * PhysicalDeviceInfo->NegotiatedDataWidthBits/8));
-      if (InquiryUnitSerialNumber->PeripheralDeviceType != 0x1F)
-	DAC960_Info("         Serial Number: %s\n", Controller, SerialNumber);
-      if (PhysicalDeviceInfo->PhysicalDeviceState ==
-	  DAC960_V2_Device_Unconfigured)
-	continue;
-      DAC960_Info("         Disk Status: %s, %u blocks\n", Controller,
-		  (PhysicalDeviceInfo->PhysicalDeviceState
-		   == DAC960_V2_Device_Online
-		   ? "Online"
-		   : PhysicalDeviceInfo->PhysicalDeviceState
-		     == DAC960_V2_Device_Rebuild
-		     ? "Rebuild"
-		     : PhysicalDeviceInfo->PhysicalDeviceState
-		       == DAC960_V2_Device_Missing
-		       ? "Missing"
-		       : PhysicalDeviceInfo->PhysicalDeviceState
-			 == DAC960_V2_Device_Critical
-			 ? "Critical"
-			 : PhysicalDeviceInfo->PhysicalDeviceState
-			   == DAC960_V2_Device_Dead
-			   ? "Dead"
-			   : PhysicalDeviceInfo->PhysicalDeviceState
-			     == DAC960_V2_Device_SuspectedDead
-			     ? "Suspected-Dead"
-			     : PhysicalDeviceInfo->PhysicalDeviceState
-			       == DAC960_V2_Device_CommandedOffline
-			       ? "Commanded-Offline"
-			       : PhysicalDeviceInfo->PhysicalDeviceState
-				 == DAC960_V2_Device_Standby
-				 ? "Standby" : "Unknown"),
-		  PhysicalDeviceInfo->ConfigurableDeviceSize);
-      if (PhysicalDeviceInfo->ParityErrors == 0 &&
-	  PhysicalDeviceInfo->SoftErrors == 0 &&
-	  PhysicalDeviceInfo->HardErrors == 0 &&
-	  PhysicalDeviceInfo->MiscellaneousErrors == 0 &&
-	  PhysicalDeviceInfo->CommandTimeouts == 0 &&
-	  PhysicalDeviceInfo->Retries == 0 &&
-	  PhysicalDeviceInfo->Aborts == 0 &&
-	  PhysicalDeviceInfo->PredictedFailuresDetected == 0)
-	continue;
-      DAC960_Info("         Errors - Parity: %d, Soft: %d, "
-		  "Hard: %d, Misc: %d\n", Controller,
-		  PhysicalDeviceInfo->ParityErrors,
-		  PhysicalDeviceInfo->SoftErrors,
-		  PhysicalDeviceInfo->HardErrors,
-		  PhysicalDeviceInfo->MiscellaneousErrors);
-      DAC960_Info("                  Timeouts: %d, Retries: %d, "
-		  "Aborts: %d, Predicted: %d\n", Controller,
-		  PhysicalDeviceInfo->CommandTimeouts,
-		  PhysicalDeviceInfo->Retries,
-		  PhysicalDeviceInfo->Aborts,
-		  PhysicalDeviceInfo->PredictedFailuresDetected);
-    }
-  DAC960_Info("  Logical Drives:\n", Controller);
-  for (LogicalDriveNumber = 0;
-       LogicalDriveNumber < DAC960_MaxLogicalDrives;
-       LogicalDriveNumber++)
-    {
-      DAC960_V2_LogicalDeviceInfo_T *LogicalDeviceInfo =
-	Controller->V2.LogicalDeviceInformation[LogicalDriveNumber];
-      static const unsigned char *ReadCacheStatus[] = {
-        "Read Cache Disabled",
-        "Read Cache Enabled",
-        "Read Ahead Enabled",
-        "Intelligent Read Ahead Enabled",
-        "-", "-", "-", "-"
-      };
-      static const unsigned char *WriteCacheStatus[] = {
-        "Write Cache Disabled",
-        "Logical Device Read Only",
-        "Write Cache Enabled",
-        "Intelligent Write Cache Enabled",
-        "-", "-", "-", "-"
-      };
-      unsigned char *GeometryTranslation;
-      if (LogicalDeviceInfo == NULL) continue;
-      switch (LogicalDeviceInfo->DriveGeometry)
-	{
-	case DAC960_V2_Geometry_128_32:
-	  GeometryTranslation = "128/32";
-	  break;
-	case DAC960_V2_Geometry_255_63:
-	  GeometryTranslation = "255/63";
-	  break;
-	default:
-	  GeometryTranslation = "Invalid";
-	  DAC960_Error("Illegal Logical Device Geometry %d\n",
-		       Controller, LogicalDeviceInfo->DriveGeometry);
-	  break;
-	}
-      DAC960_Info("    /dev/rd/c%dd%d: RAID-%d, %s, %u blocks\n",
-		  Controller, Controller->ControllerNumber, LogicalDriveNumber,
-		  LogicalDeviceInfo->RAIDLevel,
-		  (LogicalDeviceInfo->LogicalDeviceState
-		   == DAC960_V2_LogicalDevice_Online
-		   ? "Online"
-		   : LogicalDeviceInfo->LogicalDeviceState
-		     == DAC960_V2_LogicalDevice_Critical
-		     ? "Critical" : "Offline"),
-		  LogicalDeviceInfo->ConfigurableDeviceSize);
-      DAC960_Info("                  Logical Device %s, BIOS Geometry: %s\n",
-		  Controller,
-		  (LogicalDeviceInfo->LogicalDeviceControl
-				     .LogicalDeviceInitialized
-		   ? "Initialized" : "Uninitialized"),
-		  GeometryTranslation);
-      if (LogicalDeviceInfo->StripeSize == 0)
-	{
-	  if (LogicalDeviceInfo->CacheLineSize == 0)
-	    DAC960_Info("                  Stripe Size: N/A, "
-			"Segment Size: N/A\n", Controller);
-	  else
-	    DAC960_Info("                  Stripe Size: N/A, "
-			"Segment Size: %dKB\n", Controller,
-			1 << (LogicalDeviceInfo->CacheLineSize - 2));
-	}
-      else
-	{
-	  if (LogicalDeviceInfo->CacheLineSize == 0)
-	    DAC960_Info("                  Stripe Size: %dKB, "
-			"Segment Size: N/A\n", Controller,
-			1 << (LogicalDeviceInfo->StripeSize - 2));
-	  else
-	    DAC960_Info("                  Stripe Size: %dKB, "
-			"Segment Size: %dKB\n", Controller,
-			1 << (LogicalDeviceInfo->StripeSize - 2),
-			1 << (LogicalDeviceInfo->CacheLineSize - 2));
-	}
-      DAC960_Info("                  %s, %s\n", Controller,
-		  ReadCacheStatus[
-		    LogicalDeviceInfo->LogicalDeviceControl.ReadCache],
-		  WriteCacheStatus[
-		    LogicalDeviceInfo->LogicalDeviceControl.WriteCache]);
-      if (LogicalDeviceInfo->SoftErrors > 0 ||
-	  LogicalDeviceInfo->CommandsFailed > 0 ||
-	  LogicalDeviceInfo->DeferredWriteErrors)
-	DAC960_Info("                  Errors - Soft: %d, Failed: %d, "
-		    "Deferred Write: %d\n", Controller,
-		    LogicalDeviceInfo->SoftErrors,
-		    LogicalDeviceInfo->CommandsFailed,
-		    LogicalDeviceInfo->DeferredWriteErrors);
-
-    }
-  return true;
-}
-
-/*
-  DAC960_RegisterBlockDevice registers the Block Device structures
-  associated with Controller.
-*/
-
-static bool DAC960_RegisterBlockDevice(DAC960_Controller_T *Controller)
-{
-  int MajorNumber = DAC960_MAJOR + Controller->ControllerNumber;
-  int n;
-
-  /*
-    Register the Block Device Major Number for this DAC960 Controller.
-  */
-  if (register_blkdev(MajorNumber, "dac960") < 0)
-      return false;
-
-  for (n = 0; n < DAC960_MaxLogicalDrives; n++) {
-	struct gendisk *disk = Controller->disks[n];
-  	struct request_queue *RequestQueue;
-
-	/* for now, let all request queues share controller's lock */
-  	RequestQueue = blk_init_queue(DAC960_RequestFunction,&Controller->queue_lock);
-  	if (!RequestQueue) {
-		printk("DAC960: failure to allocate request queue\n");
-		continue;
-  	}
-  	Controller->RequestQueue[n] = RequestQueue;
-  	RequestQueue->queuedata = Controller;
-	blk_queue_max_segments(RequestQueue, Controller->DriverScatterGatherLimit);
-	blk_queue_max_hw_sectors(RequestQueue, Controller->MaxBlocksPerCommand);
-	disk->queue = RequestQueue;
-	sprintf(disk->disk_name, "rd/c%dd%d", Controller->ControllerNumber, n);
-	disk->major = MajorNumber;
-	disk->first_minor = n << DAC960_MaxPartitionsBits;
-	disk->fops = &DAC960_BlockDeviceOperations;
-   }
-  /*
-    Indicate the Block Device Registration completed successfully,
-  */
-  return true;
-}
-
-
-/*
-  DAC960_UnregisterBlockDevice unregisters the Block Device structures
-  associated with Controller.
-*/
-
-static void DAC960_UnregisterBlockDevice(DAC960_Controller_T *Controller)
-{
-  int MajorNumber = DAC960_MAJOR + Controller->ControllerNumber;
-  int disk;
-
-  /* does order matter when deleting gendisk and cleanup in request queue? */
-  for (disk = 0; disk < DAC960_MaxLogicalDrives; disk++) {
-	del_gendisk(Controller->disks[disk]);
-	blk_cleanup_queue(Controller->RequestQueue[disk]);
-	Controller->RequestQueue[disk] = NULL;
-  }
-
-  /*
-    Unregister the Block Device Major Number for this DAC960 Controller.
-  */
-  unregister_blkdev(MajorNumber, "dac960");
-}
-
-/*
-  DAC960_ComputeGenericDiskInfo computes the values for the Generic Disk
-  Information Partition Sector Counts and Block Sizes.
-*/
-
-static void DAC960_ComputeGenericDiskInfo(DAC960_Controller_T *Controller)
-{
-	int disk;
-	for (disk = 0; disk < DAC960_MaxLogicalDrives; disk++)
-		set_capacity(Controller->disks[disk], disk_size(Controller, disk));
-}
-
-/*
-  DAC960_ReportErrorStatus reports Controller BIOS Messages passed through
-  the Error Status Register when the driver performs the BIOS handshaking.
-  It returns true for fatal errors and false otherwise.
-*/
-
-static bool DAC960_ReportErrorStatus(DAC960_Controller_T *Controller,
-					unsigned char ErrorStatus,
-					unsigned char Parameter0,
-					unsigned char Parameter1)
-{
-  switch (ErrorStatus)
-    {
-    case 0x00:
-      DAC960_Notice("Physical Device %d:%d Not Responding\n",
-		    Controller, Parameter1, Parameter0);
-      break;
-    case 0x08:
-      if (Controller->DriveSpinUpMessageDisplayed) break;
-      DAC960_Notice("Spinning Up Drives\n", Controller);
-      Controller->DriveSpinUpMessageDisplayed = true;
-      break;
-    case 0x30:
-      DAC960_Notice("Configuration Checksum Error\n", Controller);
-      break;
-    case 0x60:
-      DAC960_Notice("Mirror Race Recovery Failed\n", Controller);
-      break;
-    case 0x70:
-      DAC960_Notice("Mirror Race Recovery In Progress\n", Controller);
-      break;
-    case 0x90:
-      DAC960_Notice("Physical Device %d:%d COD Mismatch\n",
-		    Controller, Parameter1, Parameter0);
-      break;
-    case 0xA0:
-      DAC960_Notice("Logical Drive Installation Aborted\n", Controller);
-      break;
-    case 0xB0:
-      DAC960_Notice("Mirror Race On A Critical Logical Drive\n", Controller);
-      break;
-    case 0xD0:
-      DAC960_Notice("New Controller Configuration Found\n", Controller);
-      break;
-    case 0xF0:
-      DAC960_Error("Fatal Memory Parity Error for Controller at\n", Controller);
-      return true;
-    default:
-      DAC960_Error("Unknown Initialization Error %02X for Controller at\n",
-		   Controller, ErrorStatus);
-      return true;
-    }
-  return false;
-}
-
-
-/*
- * DAC960_DetectCleanup releases the resources that were allocated
- * during DAC960_DetectController().  DAC960_DetectController can
- * has several internal failure points, so not ALL resources may 
- * have been allocated.  It's important to free only
- * resources that HAVE been allocated.  The code below always
- * tests that the resource has been allocated before attempting to
- * free it.
- */
-static void DAC960_DetectCleanup(DAC960_Controller_T *Controller)
-{
-  int i;
-
-  /* Free the memory mailbox, status, and related structures */
-  free_dma_loaf(Controller->PCIDevice, &Controller->DmaPages);
-  if (Controller->MemoryMappedAddress) {
-  	switch(Controller->HardwareType)
-  	{
-		case DAC960_GEM_Controller:
-			DAC960_GEM_DisableInterrupts(Controller->BaseAddress);
-			break;
-		case DAC960_BA_Controller:
-			DAC960_BA_DisableInterrupts(Controller->BaseAddress);
-			break;
-		case DAC960_LP_Controller:
-			DAC960_LP_DisableInterrupts(Controller->BaseAddress);
-			break;
-		case DAC960_LA_Controller:
-			DAC960_LA_DisableInterrupts(Controller->BaseAddress);
-			break;
-		case DAC960_PG_Controller:
-			DAC960_PG_DisableInterrupts(Controller->BaseAddress);
-			break;
-		case DAC960_PD_Controller:
-			DAC960_PD_DisableInterrupts(Controller->BaseAddress);
-			break;
-		case DAC960_P_Controller:
-			DAC960_PD_DisableInterrupts(Controller->BaseAddress);
-			break;
-  	}
-  	iounmap(Controller->MemoryMappedAddress);
-  }
-  if (Controller->IRQ_Channel)
-  	free_irq(Controller->IRQ_Channel, Controller);
-  if (Controller->IO_Address)
-	release_region(Controller->IO_Address, 0x80);
-  pci_disable_device(Controller->PCIDevice);
-  for (i = 0; (i < DAC960_MaxLogicalDrives) && Controller->disks[i]; i++)
-       put_disk(Controller->disks[i]);
-  DAC960_Controllers[Controller->ControllerNumber] = NULL;
-  kfree(Controller);
-}
-
-
-/*
-  DAC960_DetectController detects Mylex DAC960/AcceleRAID/eXtremeRAID
-  PCI RAID Controllers by interrogating the PCI Configuration Space for
-  Controller Type.
-*/
-
-static DAC960_Controller_T * 
-DAC960_DetectController(struct pci_dev *PCI_Device,
-			const struct pci_device_id *entry)
-{
-  struct DAC960_privdata *privdata =
-	  	(struct DAC960_privdata *)entry->driver_data;
-  irq_handler_t InterruptHandler = privdata->InterruptHandler;
-  unsigned int MemoryWindowSize = privdata->MemoryWindowSize;
-  DAC960_Controller_T *Controller = NULL;
-  unsigned char DeviceFunction = PCI_Device->devfn;
-  unsigned char ErrorStatus, Parameter0, Parameter1;
-  unsigned int IRQ_Channel;
-  void __iomem *BaseAddress;
-  int i;
-
-  Controller = kzalloc(sizeof(DAC960_Controller_T), GFP_ATOMIC);
-  if (Controller == NULL) {
-	DAC960_Error("Unable to allocate Controller structure for "
-                       "Controller at\n", NULL);
-	return NULL;
-  }
-  Controller->ControllerNumber = DAC960_ControllerCount;
-  DAC960_Controllers[DAC960_ControllerCount++] = Controller;
-  Controller->Bus = PCI_Device->bus->number;
-  Controller->FirmwareType = privdata->FirmwareType;
-  Controller->HardwareType = privdata->HardwareType;
-  Controller->Device = DeviceFunction >> 3;
-  Controller->Function = DeviceFunction & 0x7;
-  Controller->PCIDevice = PCI_Device;
-  strcpy(Controller->FullModelName, "DAC960");
-
-  if (pci_enable_device(PCI_Device))
-	goto Failure;
-
-  switch (Controller->HardwareType)
-  {
-	case DAC960_GEM_Controller:
-	  Controller->PCI_Address = pci_resource_start(PCI_Device, 0);
-	  break;
-	case DAC960_BA_Controller:
-	  Controller->PCI_Address = pci_resource_start(PCI_Device, 0);
-	  break;
-	case DAC960_LP_Controller:
-	  Controller->PCI_Address = pci_resource_start(PCI_Device, 0);
-	  break;
-	case DAC960_LA_Controller:
-	  Controller->PCI_Address = pci_resource_start(PCI_Device, 0);
-	  break;
-	case DAC960_PG_Controller:
-	  Controller->PCI_Address = pci_resource_start(PCI_Device, 0);
-	  break;
-	case DAC960_PD_Controller:
-	  Controller->IO_Address = pci_resource_start(PCI_Device, 0);
-	  Controller->PCI_Address = pci_resource_start(PCI_Device, 1);
-	  break;
-	case DAC960_P_Controller:
-	  Controller->IO_Address = pci_resource_start(PCI_Device, 0);
-	  Controller->PCI_Address = pci_resource_start(PCI_Device, 1);
-	  break;
-  }
-
-  pci_set_drvdata(PCI_Device, (void *)((long)Controller->ControllerNumber));
-  for (i = 0; i < DAC960_MaxLogicalDrives; i++) {
-	Controller->disks[i] = alloc_disk(1<<DAC960_MaxPartitionsBits);
-	if (!Controller->disks[i])
-		goto Failure;
-	Controller->disks[i]->private_data = (void *)((long)i);
-  }
-  init_waitqueue_head(&Controller->CommandWaitQueue);
-  init_waitqueue_head(&Controller->HealthStatusWaitQueue);
-  spin_lock_init(&Controller->queue_lock);
-  DAC960_AnnounceDriver(Controller);
-  /*
-    Map the Controller Register Window.
-  */
- if (MemoryWindowSize < PAGE_SIZE)
-	MemoryWindowSize = PAGE_SIZE;
-  Controller->MemoryMappedAddress =
-	ioremap_nocache(Controller->PCI_Address & PAGE_MASK, MemoryWindowSize);
-  Controller->BaseAddress =
-	Controller->MemoryMappedAddress + (Controller->PCI_Address & ~PAGE_MASK);
-  if (Controller->MemoryMappedAddress == NULL)
-  {
-	  DAC960_Error("Unable to map Controller Register Window for "
-		       "Controller at\n", Controller);
-	  goto Failure;
-  }
-  BaseAddress = Controller->BaseAddress;
-  switch (Controller->HardwareType)
-  {
-	case DAC960_GEM_Controller:
-	  DAC960_GEM_DisableInterrupts(BaseAddress);
-	  DAC960_GEM_AcknowledgeHardwareMailboxStatus(BaseAddress);
-	  udelay(1000);
-	  while (DAC960_GEM_InitializationInProgressP(BaseAddress))
-	    {
-	      if (DAC960_GEM_ReadErrorStatus(BaseAddress, &ErrorStatus,
-					    &Parameter0, &Parameter1) &&
-		  DAC960_ReportErrorStatus(Controller, ErrorStatus,
-					   Parameter0, Parameter1))
-		goto Failure;
-	      udelay(10);
-	    }
-	  if (!DAC960_V2_EnableMemoryMailboxInterface(Controller))
-	    {
-	      DAC960_Error("Unable to Enable Memory Mailbox Interface "
-			   "for Controller at\n", Controller);
-	      goto Failure;
-	    }
-	  DAC960_GEM_EnableInterrupts(BaseAddress);
-	  Controller->QueueCommand = DAC960_GEM_QueueCommand;
-	  Controller->ReadControllerConfiguration =
-	    DAC960_V2_ReadControllerConfiguration;
-	  Controller->ReadDeviceConfiguration =
-	    DAC960_V2_ReadDeviceConfiguration;
-	  Controller->ReportDeviceConfiguration =
-	    DAC960_V2_ReportDeviceConfiguration;
-	  Controller->QueueReadWriteCommand =
-	    DAC960_V2_QueueReadWriteCommand;
-	  break;
-	case DAC960_BA_Controller:
-	  DAC960_BA_DisableInterrupts(BaseAddress);
-	  DAC960_BA_AcknowledgeHardwareMailboxStatus(BaseAddress);
-	  udelay(1000);
-	  while (DAC960_BA_InitializationInProgressP(BaseAddress))
-	    {
-	      if (DAC960_BA_ReadErrorStatus(BaseAddress, &ErrorStatus,
-					    &Parameter0, &Parameter1) &&
-		  DAC960_ReportErrorStatus(Controller, ErrorStatus,
-					   Parameter0, Parameter1))
-		goto Failure;
-	      udelay(10);
-	    }
-	  if (!DAC960_V2_EnableMemoryMailboxInterface(Controller))
-	    {
-	      DAC960_Error("Unable to Enable Memory Mailbox Interface "
-			   "for Controller at\n", Controller);
-	      goto Failure;
-	    }
-	  DAC960_BA_EnableInterrupts(BaseAddress);
-	  Controller->QueueCommand = DAC960_BA_QueueCommand;
-	  Controller->ReadControllerConfiguration =
-	    DAC960_V2_ReadControllerConfiguration;
-	  Controller->ReadDeviceConfiguration =
-	    DAC960_V2_ReadDeviceConfiguration;
-	  Controller->ReportDeviceConfiguration =
-	    DAC960_V2_ReportDeviceConfiguration;
-	  Controller->QueueReadWriteCommand =
-	    DAC960_V2_QueueReadWriteCommand;
-	  break;
-	case DAC960_LP_Controller:
-	  DAC960_LP_DisableInterrupts(BaseAddress);
-	  DAC960_LP_AcknowledgeHardwareMailboxStatus(BaseAddress);
-	  udelay(1000);
-	  while (DAC960_LP_InitializationInProgressP(BaseAddress))
-	    {
-	      if (DAC960_LP_ReadErrorStatus(BaseAddress, &ErrorStatus,
-					    &Parameter0, &Parameter1) &&
-		  DAC960_ReportErrorStatus(Controller, ErrorStatus,
-					   Parameter0, Parameter1))
-		goto Failure;
-	      udelay(10);
-	    }
-	  if (!DAC960_V2_EnableMemoryMailboxInterface(Controller))
-	    {
-	      DAC960_Error("Unable to Enable Memory Mailbox Interface "
-			   "for Controller at\n", Controller);
-	      goto Failure;
-	    }
-	  DAC960_LP_EnableInterrupts(BaseAddress);
-	  Controller->QueueCommand = DAC960_LP_QueueCommand;
-	  Controller->ReadControllerConfiguration =
-	    DAC960_V2_ReadControllerConfiguration;
-	  Controller->ReadDeviceConfiguration =
-	    DAC960_V2_ReadDeviceConfiguration;
-	  Controller->ReportDeviceConfiguration =
-	    DAC960_V2_ReportDeviceConfiguration;
-	  Controller->QueueReadWriteCommand =
-	    DAC960_V2_QueueReadWriteCommand;
-	  break;
-	case DAC960_LA_Controller:
-	  DAC960_LA_DisableInterrupts(BaseAddress);
-	  DAC960_LA_AcknowledgeHardwareMailboxStatus(BaseAddress);
-	  udelay(1000);
-	  while (DAC960_LA_InitializationInProgressP(BaseAddress))
-	    {
-	      if (DAC960_LA_ReadErrorStatus(BaseAddress, &ErrorStatus,
-					    &Parameter0, &Parameter1) &&
-		  DAC960_ReportErrorStatus(Controller, ErrorStatus,
-					   Parameter0, Parameter1))
-		goto Failure;
-	      udelay(10);
-	    }
-	  if (!DAC960_V1_EnableMemoryMailboxInterface(Controller))
-	    {
-	      DAC960_Error("Unable to Enable Memory Mailbox Interface "
-			   "for Controller at\n", Controller);
-	      goto Failure;
-	    }
-	  DAC960_LA_EnableInterrupts(BaseAddress);
-	  if (Controller->V1.DualModeMemoryMailboxInterface)
-	    Controller->QueueCommand = DAC960_LA_QueueCommandDualMode;
-	  else Controller->QueueCommand = DAC960_LA_QueueCommandSingleMode;
-	  Controller->ReadControllerConfiguration =
-	    DAC960_V1_ReadControllerConfiguration;
-	  Controller->ReadDeviceConfiguration =
-	    DAC960_V1_ReadDeviceConfiguration;
-	  Controller->ReportDeviceConfiguration =
-	    DAC960_V1_ReportDeviceConfiguration;
-	  Controller->QueueReadWriteCommand =
-	    DAC960_V1_QueueReadWriteCommand;
-	  break;
-	case DAC960_PG_Controller:
-	  DAC960_PG_DisableInterrupts(BaseAddress);
-	  DAC960_PG_AcknowledgeHardwareMailboxStatus(BaseAddress);
-	  udelay(1000);
-	  while (DAC960_PG_InitializationInProgressP(BaseAddress))
-	    {
-	      if (DAC960_PG_ReadErrorStatus(BaseAddress, &ErrorStatus,
-					    &Parameter0, &Parameter1) &&
-		  DAC960_ReportErrorStatus(Controller, ErrorStatus,
-					   Parameter0, Parameter1))
-		goto Failure;
-	      udelay(10);
-	    }
-	  if (!DAC960_V1_EnableMemoryMailboxInterface(Controller))
-	    {
-	      DAC960_Error("Unable to Enable Memory Mailbox Interface "
-			   "for Controller at\n", Controller);
-	      goto Failure;
-	    }
-	  DAC960_PG_EnableInterrupts(BaseAddress);
-	  if (Controller->V1.DualModeMemoryMailboxInterface)
-	    Controller->QueueCommand = DAC960_PG_QueueCommandDualMode;
-	  else Controller->QueueCommand = DAC960_PG_QueueCommandSingleMode;
-	  Controller->ReadControllerConfiguration =
-	    DAC960_V1_ReadControllerConfiguration;
-	  Controller->ReadDeviceConfiguration =
-	    DAC960_V1_ReadDeviceConfiguration;
-	  Controller->ReportDeviceConfiguration =
-	    DAC960_V1_ReportDeviceConfiguration;
-	  Controller->QueueReadWriteCommand =
-	    DAC960_V1_QueueReadWriteCommand;
-	  break;
-	case DAC960_PD_Controller:
-	  if (!request_region(Controller->IO_Address, 0x80,
-			      Controller->FullModelName)) {
-		DAC960_Error("IO port 0x%lx busy for Controller at\n",
-			     Controller, Controller->IO_Address);
-		goto Failure;
-	  }
-	  DAC960_PD_DisableInterrupts(BaseAddress);
-	  DAC960_PD_AcknowledgeStatus(BaseAddress);
-	  udelay(1000);
-	  while (DAC960_PD_InitializationInProgressP(BaseAddress))
-	    {
-	      if (DAC960_PD_ReadErrorStatus(BaseAddress, &ErrorStatus,
-					    &Parameter0, &Parameter1) &&
-		  DAC960_ReportErrorStatus(Controller, ErrorStatus,
-					   Parameter0, Parameter1))
-		goto Failure;
-	      udelay(10);
-	    }
-	  if (!DAC960_V1_EnableMemoryMailboxInterface(Controller))
-	    {
-	      DAC960_Error("Unable to allocate DMA mapped memory "
-			   "for Controller at\n", Controller);
-	      goto Failure;
-	    }
-	  DAC960_PD_EnableInterrupts(BaseAddress);
-	  Controller->QueueCommand = DAC960_PD_QueueCommand;
-	  Controller->ReadControllerConfiguration =
-	    DAC960_V1_ReadControllerConfiguration;
-	  Controller->ReadDeviceConfiguration =
-	    DAC960_V1_ReadDeviceConfiguration;
-	  Controller->ReportDeviceConfiguration =
-	    DAC960_V1_ReportDeviceConfiguration;
-	  Controller->QueueReadWriteCommand =
-	    DAC960_V1_QueueReadWriteCommand;
-	  break;
-	case DAC960_P_Controller:
-	  if (!request_region(Controller->IO_Address, 0x80,
-			      Controller->FullModelName)){
-		DAC960_Error("IO port 0x%lx busy for Controller at\n",
-		   	     Controller, Controller->IO_Address);
-		goto Failure;
-	  }
-	  DAC960_PD_DisableInterrupts(BaseAddress);
-	  DAC960_PD_AcknowledgeStatus(BaseAddress);
-	  udelay(1000);
-	  while (DAC960_PD_InitializationInProgressP(BaseAddress))
-	    {
-	      if (DAC960_PD_ReadErrorStatus(BaseAddress, &ErrorStatus,
-					    &Parameter0, &Parameter1) &&
-		  DAC960_ReportErrorStatus(Controller, ErrorStatus,
-					   Parameter0, Parameter1))
-		goto Failure;
-	      udelay(10);
-	    }
-	  if (!DAC960_V1_EnableMemoryMailboxInterface(Controller))
-	    {
-	      DAC960_Error("Unable to allocate DMA mapped memory"
-			   "for Controller at\n", Controller);
-	      goto Failure;
-	    }
-	  DAC960_PD_EnableInterrupts(BaseAddress);
-	  Controller->QueueCommand = DAC960_P_QueueCommand;
-	  Controller->ReadControllerConfiguration =
-	    DAC960_V1_ReadControllerConfiguration;
-	  Controller->ReadDeviceConfiguration =
-	    DAC960_V1_ReadDeviceConfiguration;
-	  Controller->ReportDeviceConfiguration =
-	    DAC960_V1_ReportDeviceConfiguration;
-	  Controller->QueueReadWriteCommand =
-	    DAC960_V1_QueueReadWriteCommand;
-	  break;
-  }
-  /*
-     Acquire shared access to the IRQ Channel.
-  */
-  IRQ_Channel = PCI_Device->irq;
-  if (request_irq(IRQ_Channel, InterruptHandler, IRQF_SHARED,
-		      Controller->FullModelName, Controller) < 0)
-  {
-	DAC960_Error("Unable to acquire IRQ Channel %d for Controller at\n",
-		       Controller, Controller->IRQ_Channel);
-	goto Failure;
-  }
-  Controller->IRQ_Channel = IRQ_Channel;
-  Controller->InitialCommand.CommandIdentifier = 1;
-  Controller->InitialCommand.Controller = Controller;
-  Controller->Commands[0] = &Controller->InitialCommand;
-  Controller->FreeCommands = &Controller->InitialCommand;
-  return Controller;
-      
-Failure:
-  if (Controller->IO_Address == 0)
-	DAC960_Error("PCI Bus %d Device %d Function %d I/O Address N/A "
-		     "PCI Address 0x%X\n", Controller,
-		     Controller->Bus, Controller->Device,
-		     Controller->Function, Controller->PCI_Address);
-  else
-	DAC960_Error("PCI Bus %d Device %d Function %d I/O Address "
-			"0x%X PCI Address 0x%X\n", Controller,
-			Controller->Bus, Controller->Device,
-			Controller->Function, Controller->IO_Address,
-			Controller->PCI_Address);
-  DAC960_DetectCleanup(Controller);
-  DAC960_ControllerCount--;
-  return NULL;
-}
-
-/*
-  DAC960_InitializeController initializes Controller.
-*/
-
-static bool 
-DAC960_InitializeController(DAC960_Controller_T *Controller)
-{
-  if (DAC960_ReadControllerConfiguration(Controller) &&
-      DAC960_ReportControllerConfiguration(Controller) &&
-      DAC960_CreateAuxiliaryStructures(Controller) &&
-      DAC960_ReadDeviceConfiguration(Controller) &&
-      DAC960_ReportDeviceConfiguration(Controller) &&
-      DAC960_RegisterBlockDevice(Controller))
-    {
-      /*
-	Initialize the Monitoring Timer.
-      */
-      timer_setup(&Controller->MonitoringTimer,
-                  DAC960_MonitoringTimerFunction, 0);
-      Controller->MonitoringTimer.expires =
-	jiffies + DAC960_MonitoringTimerInterval;
-      add_timer(&Controller->MonitoringTimer);
-      Controller->ControllerInitialized = true;
-      return true;
-    }
-  return false;
-}
-
-
-/*
-  DAC960_FinalizeController finalizes Controller.
-*/
-
-static void DAC960_FinalizeController(DAC960_Controller_T *Controller)
-{
-  if (Controller->ControllerInitialized)
-    {
-      unsigned long flags;
-
-      /*
-       * Acquiring and releasing lock here eliminates
-       * a very low probability race.
-       *
-       * The code below allocates controller command structures
-       * from the free list without holding the controller lock.
-       * This is safe assuming there is no other activity on
-       * the controller at the time.
-       * 
-       * But, there might be a monitoring command still
-       * in progress.  Setting the Shutdown flag while holding
-       * the lock ensures that there is no monitoring command
-       * in the interrupt handler currently, and any monitoring
-       * commands that complete from this time on will NOT return
-       * their command structure to the free list.
-       */
-
-      spin_lock_irqsave(&Controller->queue_lock, flags);
-      Controller->ShutdownMonitoringTimer = 1;
-      spin_unlock_irqrestore(&Controller->queue_lock, flags);
-
-      del_timer_sync(&Controller->MonitoringTimer);
-      if (Controller->FirmwareType == DAC960_V1_Controller)
-	{
-	  DAC960_Notice("Flushing Cache...", Controller);
-	  DAC960_V1_ExecuteType3(Controller, DAC960_V1_Flush, 0);
-	  DAC960_Notice("done\n", Controller);
-
-	  if (Controller->HardwareType == DAC960_PD_Controller)
-	      release_region(Controller->IO_Address, 0x80);
-	}
-      else
-	{
-	  DAC960_Notice("Flushing Cache...", Controller);
-	  DAC960_V2_DeviceOperation(Controller, DAC960_V2_PauseDevice,
-				    DAC960_V2_RAID_Controller);
-	  DAC960_Notice("done\n", Controller);
-	}
-    }
-  DAC960_UnregisterBlockDevice(Controller);
-  DAC960_DestroyAuxiliaryStructures(Controller);
-  DAC960_DestroyProcEntries(Controller);
-  DAC960_DetectCleanup(Controller);
-}
-
-
-/*
-  DAC960_Probe verifies controller's existence and
-  initializes the DAC960 Driver for that controller.
-*/
-
-static int 
-DAC960_Probe(struct pci_dev *dev, const struct pci_device_id *entry)
-{
-  int disk;
-  DAC960_Controller_T *Controller;
-
-  if (DAC960_ControllerCount == DAC960_MaxControllers)
-  {
-	DAC960_Error("More than %d DAC960 Controllers detected - "
-                       "ignoring from Controller at\n",
-                       NULL, DAC960_MaxControllers);
-	return -ENODEV;
-  }
-
-  Controller = DAC960_DetectController(dev, entry);
-  if (!Controller)
-	return -ENODEV;
-
-  if (!DAC960_InitializeController(Controller)) {
-  	DAC960_FinalizeController(Controller);
-	return -ENODEV;
-  }
-
-  for (disk = 0; disk < DAC960_MaxLogicalDrives; disk++) {
-        set_capacity(Controller->disks[disk], disk_size(Controller, disk));
-        add_disk(Controller->disks[disk]);
-  }
-  DAC960_CreateProcEntries(Controller);
-  return 0;
-}
-
-
-/*
-  DAC960_Finalize finalizes the DAC960 Driver.
-*/
-
-static void DAC960_Remove(struct pci_dev *PCI_Device)
-{
-  int Controller_Number = (long)pci_get_drvdata(PCI_Device);
-  DAC960_Controller_T *Controller = DAC960_Controllers[Controller_Number];
-  if (Controller != NULL)
-      DAC960_FinalizeController(Controller);
-}
-
-
-/*
-  DAC960_V1_QueueReadWriteCommand prepares and queues a Read/Write Command for
-  DAC960 V1 Firmware Controllers.
-*/
-
-static void DAC960_V1_QueueReadWriteCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  DAC960_V1_ScatterGatherSegment_T *ScatterGatherList =
-					Command->V1.ScatterGatherList;
-  struct scatterlist *ScatterList = Command->V1.ScatterList;
-
-  DAC960_V1_ClearCommand(Command);
-
-  if (Command->SegmentCount == 1)
-    {
-      if (Command->DmaDirection == PCI_DMA_FROMDEVICE)
-	CommandMailbox->Type5.CommandOpcode = DAC960_V1_Read;
-      else 
-        CommandMailbox->Type5.CommandOpcode = DAC960_V1_Write;
-
-      CommandMailbox->Type5.LD.TransferLength = Command->BlockCount;
-      CommandMailbox->Type5.LD.LogicalDriveNumber = Command->LogicalDriveNumber;
-      CommandMailbox->Type5.LogicalBlockAddress = Command->BlockNumber;
-      CommandMailbox->Type5.BusAddress =
-			(DAC960_BusAddress32_T)sg_dma_address(ScatterList);	
-    }
-  else
-    {
-      int i;
-
-      if (Command->DmaDirection == PCI_DMA_FROMDEVICE)
-	CommandMailbox->Type5.CommandOpcode = DAC960_V1_ReadWithScatterGather;
-      else
-	CommandMailbox->Type5.CommandOpcode = DAC960_V1_WriteWithScatterGather;
-
-      CommandMailbox->Type5.LD.TransferLength = Command->BlockCount;
-      CommandMailbox->Type5.LD.LogicalDriveNumber = Command->LogicalDriveNumber;
-      CommandMailbox->Type5.LogicalBlockAddress = Command->BlockNumber;
-      CommandMailbox->Type5.BusAddress = Command->V1.ScatterGatherListDMA;
-
-      CommandMailbox->Type5.ScatterGatherCount = Command->SegmentCount;
-
-      for (i = 0; i < Command->SegmentCount; i++, ScatterList++, ScatterGatherList++) {
-		ScatterGatherList->SegmentDataPointer =
-			(DAC960_BusAddress32_T)sg_dma_address(ScatterList);
-		ScatterGatherList->SegmentByteCount =
-			(DAC960_ByteCount32_T)sg_dma_len(ScatterList);
-      }
-    }
-  DAC960_QueueCommand(Command);
-}
-
-
-/*
-  DAC960_V2_QueueReadWriteCommand prepares and queues a Read/Write Command for
-  DAC960 V2 Firmware Controllers.
-*/
-
-static void DAC960_V2_QueueReadWriteCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  struct scatterlist *ScatterList = Command->V2.ScatterList;
-
-  DAC960_V2_ClearCommand(Command);
-
-  CommandMailbox->SCSI_10.CommandOpcode = DAC960_V2_SCSI_10;
-  CommandMailbox->SCSI_10.CommandControlBits.DataTransferControllerToHost =
-    (Command->DmaDirection == PCI_DMA_FROMDEVICE);
-  CommandMailbox->SCSI_10.DataTransferSize =
-    Command->BlockCount << DAC960_BlockSizeBits;
-  CommandMailbox->SCSI_10.RequestSenseBusAddress = Command->V2.RequestSenseDMA;
-  CommandMailbox->SCSI_10.PhysicalDevice =
-    Controller->V2.LogicalDriveToVirtualDevice[Command->LogicalDriveNumber];
-  CommandMailbox->SCSI_10.RequestSenseSize = sizeof(DAC960_SCSI_RequestSense_T);
-  CommandMailbox->SCSI_10.CDBLength = 10;
-  CommandMailbox->SCSI_10.SCSI_CDB[0] =
-    (Command->DmaDirection == PCI_DMA_FROMDEVICE ? 0x28 : 0x2A);
-  CommandMailbox->SCSI_10.SCSI_CDB[2] = Command->BlockNumber >> 24;
-  CommandMailbox->SCSI_10.SCSI_CDB[3] = Command->BlockNumber >> 16;
-  CommandMailbox->SCSI_10.SCSI_CDB[4] = Command->BlockNumber >> 8;
-  CommandMailbox->SCSI_10.SCSI_CDB[5] = Command->BlockNumber;
-  CommandMailbox->SCSI_10.SCSI_CDB[7] = Command->BlockCount >> 8;
-  CommandMailbox->SCSI_10.SCSI_CDB[8] = Command->BlockCount;
-
-  if (Command->SegmentCount == 1)
-    {
-      CommandMailbox->SCSI_10.DataTransferMemoryAddress
-			     .ScatterGatherSegments[0]
-			     .SegmentDataPointer =
-	(DAC960_BusAddress64_T)sg_dma_address(ScatterList);
-      CommandMailbox->SCSI_10.DataTransferMemoryAddress
-			     .ScatterGatherSegments[0]
-			     .SegmentByteCount =
-	CommandMailbox->SCSI_10.DataTransferSize;
-    }
-  else
-    {
-      DAC960_V2_ScatterGatherSegment_T *ScatterGatherList;
-      int i;
-
-      if (Command->SegmentCount > 2)
-	{
-          ScatterGatherList = Command->V2.ScatterGatherList;
-	  CommandMailbox->SCSI_10.CommandControlBits
-			 .AdditionalScatterGatherListMemory = true;
-	  CommandMailbox->SCSI_10.DataTransferMemoryAddress
-		.ExtendedScatterGather.ScatterGatherList0Length = Command->SegmentCount;
-	  CommandMailbox->SCSI_10.DataTransferMemoryAddress
-			 .ExtendedScatterGather.ScatterGatherList0Address =
-	    Command->V2.ScatterGatherListDMA;
-	}
-      else
-	ScatterGatherList = CommandMailbox->SCSI_10.DataTransferMemoryAddress
-				 .ScatterGatherSegments;
-
-      for (i = 0; i < Command->SegmentCount; i++, ScatterList++, ScatterGatherList++) {
-		ScatterGatherList->SegmentDataPointer =
-			(DAC960_BusAddress64_T)sg_dma_address(ScatterList);
-		ScatterGatherList->SegmentByteCount =
-			(DAC960_ByteCount64_T)sg_dma_len(ScatterList);
-      }
-    }
-  DAC960_QueueCommand(Command);
-}
-
-
-static int DAC960_process_queue(DAC960_Controller_T *Controller, struct request_queue *req_q)
-{
-	struct request *Request;
-	DAC960_Command_T *Command;
-
-   while(1) {
-	Request = blk_peek_request(req_q);
-	if (!Request)
-		return 1;
-
-	Command = DAC960_AllocateCommand(Controller);
-	if (Command == NULL)
-		return 0;
-
-	if (rq_data_dir(Request) == READ) {
-		Command->DmaDirection = PCI_DMA_FROMDEVICE;
-		Command->CommandType = DAC960_ReadCommand;
-	} else {
-		Command->DmaDirection = PCI_DMA_TODEVICE;
-		Command->CommandType = DAC960_WriteCommand;
-	}
-	Command->Completion = Request->end_io_data;
-	Command->LogicalDriveNumber = (long)Request->rq_disk->private_data;
-	Command->BlockNumber = blk_rq_pos(Request);
-	Command->BlockCount = blk_rq_sectors(Request);
-	Command->Request = Request;
-	blk_start_request(Request);
-	Command->SegmentCount = blk_rq_map_sg(req_q,
-		  Command->Request, Command->cmd_sglist);
-	/* pci_map_sg MAY change the value of SegCount */
-	Command->SegmentCount = pci_map_sg(Controller->PCIDevice, Command->cmd_sglist,
-		 Command->SegmentCount, Command->DmaDirection);
-
-	DAC960_QueueReadWriteCommand(Command);
-  }
-}
-
-/*
-  DAC960_ProcessRequest attempts to remove one I/O Request from Controller's
-  I/O Request Queue and queues it to the Controller.  WaitForCommand is true if
-  this function should wait for a Command to become available if necessary.
-  This function returns true if an I/O Request was queued and false otherwise.
-*/
-static void DAC960_ProcessRequest(DAC960_Controller_T *controller)
-{
-	int i;
-
-	if (!controller->ControllerInitialized)
-		return;
-
-	/* Do this better later! */
-	for (i = controller->req_q_index; i < DAC960_MaxLogicalDrives; i++) {
-		struct request_queue *req_q = controller->RequestQueue[i];
-
-		if (req_q == NULL)
-			continue;
-
-		if (!DAC960_process_queue(controller, req_q)) {
-			controller->req_q_index = i;
-			return;
-		}
-	}
-
-	if (controller->req_q_index == 0)
-		return;
-
-	for (i = 0; i < controller->req_q_index; i++) {
-		struct request_queue *req_q = controller->RequestQueue[i];
-
-		if (req_q == NULL)
-			continue;
-
-		if (!DAC960_process_queue(controller, req_q)) {
-			controller->req_q_index = i;
-			return;
-		}
-	}
-}
-
-
-/*
-  DAC960_queue_partial_rw extracts one bio from the request already
-  associated with argument command, and construct a new command block to retry I/O
-  only on that bio.  Queue that command to the controller.
-
-  This function re-uses a previously-allocated Command,
-  	there is no failure mode from trying to allocate a command.
-*/
-
-static void DAC960_queue_partial_rw(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  struct request *Request = Command->Request;
-  struct request_queue *req_q = Controller->RequestQueue[Command->LogicalDriveNumber];
-
-  if (Command->DmaDirection == PCI_DMA_FROMDEVICE)
-    Command->CommandType = DAC960_ReadRetryCommand;
-  else
-    Command->CommandType = DAC960_WriteRetryCommand;
-
-  /*
-   * We could be more efficient with these mapping requests
-   * and map only the portions that we need.  But since this
-   * code should almost never be called, just go with a
-   * simple coding.
-   */
-  (void)blk_rq_map_sg(req_q, Command->Request, Command->cmd_sglist);
-
-  (void)pci_map_sg(Controller->PCIDevice, Command->cmd_sglist, 1, Command->DmaDirection);
-  /*
-   * Resubmitting the request sector at a time is really tedious.
-   * But, this should almost never happen.  So, we're willing to pay
-   * this price so that in the end, as much of the transfer is completed
-   * successfully as possible.
-   */
-  Command->SegmentCount = 1;
-  Command->BlockNumber = blk_rq_pos(Request);
-  Command->BlockCount = 1;
-  DAC960_QueueReadWriteCommand(Command);
-  return;
-}
-
-/*
-  DAC960_RequestFunction is the I/O Request Function for DAC960 Controllers.
-*/
-
-static void DAC960_RequestFunction(struct request_queue *RequestQueue)
-{
-	DAC960_ProcessRequest(RequestQueue->queuedata);
-}
-
-/*
-  DAC960_ProcessCompletedBuffer performs completion processing for an
-  individual Buffer.
-*/
-
-static inline bool DAC960_ProcessCompletedRequest(DAC960_Command_T *Command,
-						 bool SuccessfulIO)
-{
-	struct request *Request = Command->Request;
-	blk_status_t Error = SuccessfulIO ? BLK_STS_OK : BLK_STS_IOERR;
-
-	pci_unmap_sg(Command->Controller->PCIDevice, Command->cmd_sglist,
-		Command->SegmentCount, Command->DmaDirection);
-
-	 if (!__blk_end_request(Request, Error, Command->BlockCount << 9)) {
-		if (Command->Completion) {
-			complete(Command->Completion);
-			Command->Completion = NULL;
-		}
-		return true;
-	}
-	return false;
-}
-
-/*
-  DAC960_V1_ReadWriteError prints an appropriate error message for Command
-  when an error occurs on a Read or Write operation.
-*/
-
-static void DAC960_V1_ReadWriteError(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  unsigned char *CommandName = "UNKNOWN";
-  switch (Command->CommandType)
-    {
-    case DAC960_ReadCommand:
-    case DAC960_ReadRetryCommand:
-      CommandName = "READ";
-      break;
-    case DAC960_WriteCommand:
-    case DAC960_WriteRetryCommand:
-      CommandName = "WRITE";
-      break;
-    case DAC960_MonitoringCommand:
-    case DAC960_ImmediateCommand:
-    case DAC960_QueuedCommand:
-      break;
-    }
-  switch (Command->V1.CommandStatus)
-    {
-    case DAC960_V1_IrrecoverableDataError:
-      DAC960_Error("Irrecoverable Data Error on %s:\n",
-		   Controller, CommandName);
-      break;
-    case DAC960_V1_LogicalDriveNonexistentOrOffline:
-      DAC960_Error("Logical Drive Nonexistent or Offline on %s:\n",
-		   Controller, CommandName);
-      break;
-    case DAC960_V1_AccessBeyondEndOfLogicalDrive:
-      DAC960_Error("Attempt to Access Beyond End of Logical Drive "
-		   "on %s:\n", Controller, CommandName);
-      break;
-    case DAC960_V1_BadDataEncountered:
-      DAC960_Error("Bad Data Encountered on %s:\n", Controller, CommandName);
-      break;
-    default:
-      DAC960_Error("Unexpected Error Status %04X on %s:\n",
-		   Controller, Command->V1.CommandStatus, CommandName);
-      break;
-    }
-  DAC960_Error("  /dev/rd/c%dd%d:   absolute blocks %u..%u\n",
-	       Controller, Controller->ControllerNumber,
-	       Command->LogicalDriveNumber, Command->BlockNumber,
-	       Command->BlockNumber + Command->BlockCount - 1);
-}
-
-
-/*
-  DAC960_V1_ProcessCompletedCommand performs completion processing for Command
-  for DAC960 V1 Firmware Controllers.
-*/
-
-static void DAC960_V1_ProcessCompletedCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  DAC960_CommandType_T CommandType = Command->CommandType;
-  DAC960_V1_CommandOpcode_T CommandOpcode =
-    Command->V1.CommandMailbox.Common.CommandOpcode;
-  DAC960_V1_CommandStatus_T CommandStatus = Command->V1.CommandStatus;
-
-  if (CommandType == DAC960_ReadCommand ||
-      CommandType == DAC960_WriteCommand)
-    {
-
-#ifdef FORCE_RETRY_DEBUG
-      CommandStatus = DAC960_V1_IrrecoverableDataError;
-#endif
-
-      if (CommandStatus == DAC960_V1_NormalCompletion) {
-
-		if (!DAC960_ProcessCompletedRequest(Command, true))
-			BUG();
-
-      } else if (CommandStatus == DAC960_V1_IrrecoverableDataError ||
-		CommandStatus == DAC960_V1_BadDataEncountered)
-	{
-	  /*
-	   * break the command down into pieces and resubmit each
-	   * piece, hoping that some of them will succeed.
-	   */
-	   DAC960_queue_partial_rw(Command);
-	   return;
-	}
-      else
-	{
-	  if (CommandStatus != DAC960_V1_LogicalDriveNonexistentOrOffline)
-	    DAC960_V1_ReadWriteError(Command);
-
-	 if (!DAC960_ProcessCompletedRequest(Command, false))
-		BUG();
-	}
-    }
-  else if (CommandType == DAC960_ReadRetryCommand ||
-	   CommandType == DAC960_WriteRetryCommand)
-    {
-      bool normal_completion;
-#ifdef FORCE_RETRY_FAILURE_DEBUG
-      static int retry_count = 1;
-#endif
-      /*
-        Perform completion processing for the portion that was
-        retried, and submit the next portion, if any.
-      */
-      normal_completion = true;
-      if (CommandStatus != DAC960_V1_NormalCompletion) {
-        normal_completion = false;
-        if (CommandStatus != DAC960_V1_LogicalDriveNonexistentOrOffline)
-            DAC960_V1_ReadWriteError(Command);
-      }
-
-#ifdef FORCE_RETRY_FAILURE_DEBUG
-      if (!(++retry_count % 10000)) {
-	      printk("V1 error retry failure test\n");
-	      normal_completion = false;
-              DAC960_V1_ReadWriteError(Command);
-      }
-#endif
-
-      if (!DAC960_ProcessCompletedRequest(Command, normal_completion)) {
-        DAC960_queue_partial_rw(Command);
-        return;
-      }
-    }
-
-  else if (CommandType == DAC960_MonitoringCommand)
-    {
-      if (Controller->ShutdownMonitoringTimer)
-	      return;
-      if (CommandOpcode == DAC960_V1_Enquiry)
-	{
-	  DAC960_V1_Enquiry_T *OldEnquiry = &Controller->V1.Enquiry;
-	  DAC960_V1_Enquiry_T *NewEnquiry = Controller->V1.NewEnquiry;
-	  unsigned int OldCriticalLogicalDriveCount =
-	    OldEnquiry->CriticalLogicalDriveCount;
-	  unsigned int NewCriticalLogicalDriveCount =
-	    NewEnquiry->CriticalLogicalDriveCount;
-	  if (NewEnquiry->NumberOfLogicalDrives > Controller->LogicalDriveCount)
-	    {
-	      int LogicalDriveNumber = Controller->LogicalDriveCount - 1;
-	      while (++LogicalDriveNumber < NewEnquiry->NumberOfLogicalDrives)
-		DAC960_Critical("Logical Drive %d (/dev/rd/c%dd%d) "
-				"Now Exists\n", Controller,
-				LogicalDriveNumber,
-				Controller->ControllerNumber,
-				LogicalDriveNumber);
-	      Controller->LogicalDriveCount = NewEnquiry->NumberOfLogicalDrives;
-	      DAC960_ComputeGenericDiskInfo(Controller);
-	    }
-	  if (NewEnquiry->NumberOfLogicalDrives < Controller->LogicalDriveCount)
-	    {
-	      int LogicalDriveNumber = NewEnquiry->NumberOfLogicalDrives - 1;
-	      while (++LogicalDriveNumber < Controller->LogicalDriveCount)
-		DAC960_Critical("Logical Drive %d (/dev/rd/c%dd%d) "
-				"No Longer Exists\n", Controller,
-				LogicalDriveNumber,
-				Controller->ControllerNumber,
-				LogicalDriveNumber);
-	      Controller->LogicalDriveCount = NewEnquiry->NumberOfLogicalDrives;
-	      DAC960_ComputeGenericDiskInfo(Controller);
-	    }
-	  if (NewEnquiry->StatusFlags.DeferredWriteError !=
-	      OldEnquiry->StatusFlags.DeferredWriteError)
-	    DAC960_Critical("Deferred Write Error Flag is now %s\n", Controller,
-			    (NewEnquiry->StatusFlags.DeferredWriteError
-			     ? "TRUE" : "FALSE"));
-	  if ((NewCriticalLogicalDriveCount > 0 ||
-	       NewCriticalLogicalDriveCount != OldCriticalLogicalDriveCount) ||
-	      (NewEnquiry->OfflineLogicalDriveCount > 0 ||
-	       NewEnquiry->OfflineLogicalDriveCount !=
-	       OldEnquiry->OfflineLogicalDriveCount) ||
-	      (NewEnquiry->DeadDriveCount > 0 ||
-	       NewEnquiry->DeadDriveCount !=
-	       OldEnquiry->DeadDriveCount) ||
-	      (NewEnquiry->EventLogSequenceNumber !=
-	       OldEnquiry->EventLogSequenceNumber) ||
-	      Controller->MonitoringTimerCount == 0 ||
-	      time_after_eq(jiffies, Controller->SecondaryMonitoringTime
-	       + DAC960_SecondaryMonitoringInterval))
-	    {
-	      Controller->V1.NeedLogicalDriveInformation = true;
-	      Controller->V1.NewEventLogSequenceNumber =
-		NewEnquiry->EventLogSequenceNumber;
-	      Controller->V1.NeedErrorTableInformation = true;
-	      Controller->V1.NeedDeviceStateInformation = true;
-	      Controller->V1.StartDeviceStateScan = true;
-	      Controller->V1.NeedBackgroundInitializationStatus =
-		Controller->V1.BackgroundInitializationStatusSupported;
-	      Controller->SecondaryMonitoringTime = jiffies;
-	    }
-	  if (NewEnquiry->RebuildFlag == DAC960_V1_StandbyRebuildInProgress ||
-	      NewEnquiry->RebuildFlag
-	      == DAC960_V1_BackgroundRebuildInProgress ||
-	      OldEnquiry->RebuildFlag == DAC960_V1_StandbyRebuildInProgress ||
-	      OldEnquiry->RebuildFlag == DAC960_V1_BackgroundRebuildInProgress)
-	    {
-	      Controller->V1.NeedRebuildProgress = true;
-	      Controller->V1.RebuildProgressFirst =
-		(NewEnquiry->CriticalLogicalDriveCount <
-		 OldEnquiry->CriticalLogicalDriveCount);
-	    }
-	  if (OldEnquiry->RebuildFlag == DAC960_V1_BackgroundCheckInProgress)
-	    switch (NewEnquiry->RebuildFlag)
-	      {
-	      case DAC960_V1_NoStandbyRebuildOrCheckInProgress:
-		DAC960_Progress("Consistency Check Completed Successfully\n",
-				Controller);
-		break;
-	      case DAC960_V1_StandbyRebuildInProgress:
-	      case DAC960_V1_BackgroundRebuildInProgress:
-		break;
-	      case DAC960_V1_BackgroundCheckInProgress:
-		Controller->V1.NeedConsistencyCheckProgress = true;
-		break;
-	      case DAC960_V1_StandbyRebuildCompletedWithError:
-		DAC960_Progress("Consistency Check Completed with Error\n",
-				Controller);
-		break;
-	      case DAC960_V1_BackgroundRebuildOrCheckFailed_DriveFailed:
-		DAC960_Progress("Consistency Check Failed - "
-				"Physical Device Failed\n", Controller);
-		break;
-	      case DAC960_V1_BackgroundRebuildOrCheckFailed_LogicalDriveFailed:
-		DAC960_Progress("Consistency Check Failed - "
-				"Logical Drive Failed\n", Controller);
-		break;
-	      case DAC960_V1_BackgroundRebuildOrCheckFailed_OtherCauses:
-		DAC960_Progress("Consistency Check Failed - Other Causes\n",
-				Controller);
-		break;
-	      case DAC960_V1_BackgroundRebuildOrCheckSuccessfullyTerminated:
-		DAC960_Progress("Consistency Check Successfully Terminated\n",
-				Controller);
-		break;
-	      }
-	  else if (NewEnquiry->RebuildFlag
-		   == DAC960_V1_BackgroundCheckInProgress)
-	    Controller->V1.NeedConsistencyCheckProgress = true;
-	  Controller->MonitoringAlertMode =
-	    (NewEnquiry->CriticalLogicalDriveCount > 0 ||
-	     NewEnquiry->OfflineLogicalDriveCount > 0 ||
-	     NewEnquiry->DeadDriveCount > 0);
-	  if (NewEnquiry->RebuildFlag > DAC960_V1_BackgroundCheckInProgress)
-	    {
-	      Controller->V1.PendingRebuildFlag = NewEnquiry->RebuildFlag;
-	      Controller->V1.RebuildFlagPending = true;
-	    }
-	  memcpy(&Controller->V1.Enquiry, &Controller->V1.NewEnquiry,
-		 sizeof(DAC960_V1_Enquiry_T));
-	}
-      else if (CommandOpcode == DAC960_V1_PerformEventLogOperation)
-	{
-	  static char
-	    *DAC960_EventMessages[] =
-	       { "killed because write recovery failed",
-		 "killed because of SCSI bus reset failure",
-		 "killed because of double check condition",
-		 "killed because it was removed",
-		 "killed because of gross error on SCSI chip",
-		 "killed because of bad tag returned from drive",
-		 "killed because of timeout on SCSI command",
-		 "killed because of reset SCSI command issued from system",
-		 "killed because busy or parity error count exceeded limit",
-		 "killed because of 'kill drive' command from system",
-		 "killed because of selection timeout",
-		 "killed due to SCSI phase sequence error",
-		 "killed due to unknown status" };
-	  DAC960_V1_EventLogEntry_T *EventLogEntry =
-	    	Controller->V1.EventLogEntry;
-	  if (EventLogEntry->SequenceNumber ==
-	      Controller->V1.OldEventLogSequenceNumber)
-	    {
-	      unsigned char SenseKey = EventLogEntry->SenseKey;
-	      unsigned char AdditionalSenseCode =
-		EventLogEntry->AdditionalSenseCode;
-	      unsigned char AdditionalSenseCodeQualifier =
-		EventLogEntry->AdditionalSenseCodeQualifier;
-	      if (SenseKey == DAC960_SenseKey_VendorSpecific &&
-		  AdditionalSenseCode == 0x80 &&
-		  AdditionalSenseCodeQualifier <
-		  ARRAY_SIZE(DAC960_EventMessages))
-		DAC960_Critical("Physical Device %d:%d %s\n", Controller,
-				EventLogEntry->Channel,
-				EventLogEntry->TargetID,
-				DAC960_EventMessages[
-				  AdditionalSenseCodeQualifier]);
-	      else if (SenseKey == DAC960_SenseKey_UnitAttention &&
-		       AdditionalSenseCode == 0x29)
-		{
-		  if (Controller->MonitoringTimerCount > 0)
-		    Controller->V1.DeviceResetCount[EventLogEntry->Channel]
-						   [EventLogEntry->TargetID]++;
-		}
-	      else if (!(SenseKey == DAC960_SenseKey_NoSense ||
-			 (SenseKey == DAC960_SenseKey_NotReady &&
-			  AdditionalSenseCode == 0x04 &&
-			  (AdditionalSenseCodeQualifier == 0x01 ||
-			   AdditionalSenseCodeQualifier == 0x02))))
-		{
-		  DAC960_Critical("Physical Device %d:%d Error Log: "
-				  "Sense Key = %X, ASC = %02X, ASCQ = %02X\n",
-				  Controller,
-				  EventLogEntry->Channel,
-				  EventLogEntry->TargetID,
-				  SenseKey,
-				  AdditionalSenseCode,
-				  AdditionalSenseCodeQualifier);
-		  DAC960_Critical("Physical Device %d:%d Error Log: "
-				  "Information = %02X%02X%02X%02X "
-				  "%02X%02X%02X%02X\n",
-				  Controller,
-				  EventLogEntry->Channel,
-				  EventLogEntry->TargetID,
-				  EventLogEntry->Information[0],
-				  EventLogEntry->Information[1],
-				  EventLogEntry->Information[2],
-				  EventLogEntry->Information[3],
-				  EventLogEntry->CommandSpecificInformation[0],
-				  EventLogEntry->CommandSpecificInformation[1],
-				  EventLogEntry->CommandSpecificInformation[2],
-				  EventLogEntry->CommandSpecificInformation[3]);
-		}
-	    }
-	  Controller->V1.OldEventLogSequenceNumber++;
-	}
-      else if (CommandOpcode == DAC960_V1_GetErrorTable)
-	{
-	  DAC960_V1_ErrorTable_T *OldErrorTable = &Controller->V1.ErrorTable;
-	  DAC960_V1_ErrorTable_T *NewErrorTable = Controller->V1.NewErrorTable;
-	  int Channel, TargetID;
-	  for (Channel = 0; Channel < Controller->Channels; Channel++)
-	    for (TargetID = 0; TargetID < Controller->Targets; TargetID++)
-	      {
-		DAC960_V1_ErrorTableEntry_T *NewErrorEntry =
-		  &NewErrorTable->ErrorTableEntries[Channel][TargetID];
-		DAC960_V1_ErrorTableEntry_T *OldErrorEntry =
-		  &OldErrorTable->ErrorTableEntries[Channel][TargetID];
-		if ((NewErrorEntry->ParityErrorCount !=
-		     OldErrorEntry->ParityErrorCount) ||
-		    (NewErrorEntry->SoftErrorCount !=
-		     OldErrorEntry->SoftErrorCount) ||
-		    (NewErrorEntry->HardErrorCount !=
-		     OldErrorEntry->HardErrorCount) ||
-		    (NewErrorEntry->MiscErrorCount !=
-		     OldErrorEntry->MiscErrorCount))
-		  DAC960_Critical("Physical Device %d:%d Errors: "
-				  "Parity = %d, Soft = %d, "
-				  "Hard = %d, Misc = %d\n",
-				  Controller, Channel, TargetID,
-				  NewErrorEntry->ParityErrorCount,
-				  NewErrorEntry->SoftErrorCount,
-				  NewErrorEntry->HardErrorCount,
-				  NewErrorEntry->MiscErrorCount);
-	      }
-	  memcpy(&Controller->V1.ErrorTable, Controller->V1.NewErrorTable,
-		 sizeof(DAC960_V1_ErrorTable_T));
-	}
-      else if (CommandOpcode == DAC960_V1_GetDeviceState)
-	{
-	  DAC960_V1_DeviceState_T *OldDeviceState =
-	    &Controller->V1.DeviceState[Controller->V1.DeviceStateChannel]
-				       [Controller->V1.DeviceStateTargetID];
-	  DAC960_V1_DeviceState_T *NewDeviceState =
-	    Controller->V1.NewDeviceState;
-	  if (NewDeviceState->DeviceState != OldDeviceState->DeviceState)
-	    DAC960_Critical("Physical Device %d:%d is now %s\n", Controller,
-			    Controller->V1.DeviceStateChannel,
-			    Controller->V1.DeviceStateTargetID,
-			    (NewDeviceState->DeviceState
-			     == DAC960_V1_Device_Dead
-			     ? "DEAD"
-			     : NewDeviceState->DeviceState
-			       == DAC960_V1_Device_WriteOnly
-			       ? "WRITE-ONLY"
-			       : NewDeviceState->DeviceState
-				 == DAC960_V1_Device_Online
-				 ? "ONLINE" : "STANDBY"));
-	  if (OldDeviceState->DeviceState == DAC960_V1_Device_Dead &&
-	      NewDeviceState->DeviceState != DAC960_V1_Device_Dead)
-	    {
-	      Controller->V1.NeedDeviceInquiryInformation = true;
-	      Controller->V1.NeedDeviceSerialNumberInformation = true;
-	      Controller->V1.DeviceResetCount
-			     [Controller->V1.DeviceStateChannel]
-			     [Controller->V1.DeviceStateTargetID] = 0;
-	    }
-	  memcpy(OldDeviceState, NewDeviceState,
-		 sizeof(DAC960_V1_DeviceState_T));
-	}
-      else if (CommandOpcode == DAC960_V1_GetLogicalDriveInformation)
-	{
-	  int LogicalDriveNumber;
-	  for (LogicalDriveNumber = 0;
-	       LogicalDriveNumber < Controller->LogicalDriveCount;
-	       LogicalDriveNumber++)
-	    {
-	      DAC960_V1_LogicalDriveInformation_T *OldLogicalDriveInformation =
-		&Controller->V1.LogicalDriveInformation[LogicalDriveNumber];
-	      DAC960_V1_LogicalDriveInformation_T *NewLogicalDriveInformation =
-		&(*Controller->V1.NewLogicalDriveInformation)[LogicalDriveNumber];
-	      if (NewLogicalDriveInformation->LogicalDriveState !=
-		  OldLogicalDriveInformation->LogicalDriveState)
-		DAC960_Critical("Logical Drive %d (/dev/rd/c%dd%d) "
-				"is now %s\n", Controller,
-				LogicalDriveNumber,
-				Controller->ControllerNumber,
-				LogicalDriveNumber,
-				(NewLogicalDriveInformation->LogicalDriveState
-				 == DAC960_V1_LogicalDrive_Online
-				 ? "ONLINE"
-				 : NewLogicalDriveInformation->LogicalDriveState
-				   == DAC960_V1_LogicalDrive_Critical
-				   ? "CRITICAL" : "OFFLINE"));
-	      if (NewLogicalDriveInformation->WriteBack !=
-		  OldLogicalDriveInformation->WriteBack)
-		DAC960_Critical("Logical Drive %d (/dev/rd/c%dd%d) "
-				"is now %s\n", Controller,
-				LogicalDriveNumber,
-				Controller->ControllerNumber,
-				LogicalDriveNumber,
-				(NewLogicalDriveInformation->WriteBack
-				 ? "WRITE BACK" : "WRITE THRU"));
-	    }
-	  memcpy(&Controller->V1.LogicalDriveInformation,
-		 Controller->V1.NewLogicalDriveInformation,
-		 sizeof(DAC960_V1_LogicalDriveInformationArray_T));
-	}
-      else if (CommandOpcode == DAC960_V1_GetRebuildProgress)
-	{
-	  unsigned int LogicalDriveNumber =
-	    Controller->V1.RebuildProgress->LogicalDriveNumber;
-	  unsigned int LogicalDriveSize =
-	    Controller->V1.RebuildProgress->LogicalDriveSize;
-	  unsigned int BlocksCompleted =
-	    LogicalDriveSize - Controller->V1.RebuildProgress->RemainingBlocks;
-	  if (CommandStatus == DAC960_V1_NoRebuildOrCheckInProgress &&
-	      Controller->V1.LastRebuildStatus == DAC960_V1_NormalCompletion)
-	    CommandStatus = DAC960_V1_RebuildSuccessful;
-	  switch (CommandStatus)
-	    {
-	    case DAC960_V1_NormalCompletion:
-	      Controller->EphemeralProgressMessage = true;
-	      DAC960_Progress("Rebuild in Progress: "
-			      "Logical Drive %d (/dev/rd/c%dd%d) "
-			      "%d%% completed\n",
-			      Controller, LogicalDriveNumber,
-			      Controller->ControllerNumber,
-			      LogicalDriveNumber,
-			      (100 * (BlocksCompleted >> 7))
-			      / (LogicalDriveSize >> 7));
-	      Controller->EphemeralProgressMessage = false;
-	      break;
-	    case DAC960_V1_RebuildFailed_LogicalDriveFailure:
-	      DAC960_Progress("Rebuild Failed due to "
-			      "Logical Drive Failure\n", Controller);
-	      break;
-	    case DAC960_V1_RebuildFailed_BadBlocksOnOther:
-	      DAC960_Progress("Rebuild Failed due to "
-			      "Bad Blocks on Other Drives\n", Controller);
-	      break;
-	    case DAC960_V1_RebuildFailed_NewDriveFailed:
-	      DAC960_Progress("Rebuild Failed due to "
-			      "Failure of Drive Being Rebuilt\n", Controller);
-	      break;
-	    case DAC960_V1_NoRebuildOrCheckInProgress:
-	      break;
-	    case DAC960_V1_RebuildSuccessful:
-	      DAC960_Progress("Rebuild Completed Successfully\n", Controller);
-	      break;
-	    case DAC960_V1_RebuildSuccessfullyTerminated:
-	      DAC960_Progress("Rebuild Successfully Terminated\n", Controller);
-	      break;
-	    }
-	  Controller->V1.LastRebuildStatus = CommandStatus;
-	  if (CommandType != DAC960_MonitoringCommand &&
-	      Controller->V1.RebuildStatusPending)
-	    {
-	      Command->V1.CommandStatus = Controller->V1.PendingRebuildStatus;
-	      Controller->V1.RebuildStatusPending = false;
-	    }
-	  else if (CommandType == DAC960_MonitoringCommand &&
-		   CommandStatus != DAC960_V1_NormalCompletion &&
-		   CommandStatus != DAC960_V1_NoRebuildOrCheckInProgress)
-	    {
-	      Controller->V1.PendingRebuildStatus = CommandStatus;
-	      Controller->V1.RebuildStatusPending = true;
-	    }
-	}
-      else if (CommandOpcode == DAC960_V1_RebuildStat)
-	{
-	  unsigned int LogicalDriveNumber =
-	    Controller->V1.RebuildProgress->LogicalDriveNumber;
-	  unsigned int LogicalDriveSize =
-	    Controller->V1.RebuildProgress->LogicalDriveSize;
-	  unsigned int BlocksCompleted =
-	    LogicalDriveSize - Controller->V1.RebuildProgress->RemainingBlocks;
-	  if (CommandStatus == DAC960_V1_NormalCompletion)
-	    {
-	      Controller->EphemeralProgressMessage = true;
-	      DAC960_Progress("Consistency Check in Progress: "
-			      "Logical Drive %d (/dev/rd/c%dd%d) "
-			      "%d%% completed\n",
-			      Controller, LogicalDriveNumber,
-			      Controller->ControllerNumber,
-			      LogicalDriveNumber,
-			      (100 * (BlocksCompleted >> 7))
-			      / (LogicalDriveSize >> 7));
-	      Controller->EphemeralProgressMessage = false;
-	    }
-	}
-      else if (CommandOpcode == DAC960_V1_BackgroundInitializationControl)
-	{
-	  unsigned int LogicalDriveNumber =
-	    Controller->V1.BackgroundInitializationStatus->LogicalDriveNumber;
-	  unsigned int LogicalDriveSize =
-	    Controller->V1.BackgroundInitializationStatus->LogicalDriveSize;
-	  unsigned int BlocksCompleted =
-	    Controller->V1.BackgroundInitializationStatus->BlocksCompleted;
-	  switch (CommandStatus)
-	    {
-	    case DAC960_V1_NormalCompletion:
-	      switch (Controller->V1.BackgroundInitializationStatus->Status)
-		{
-		case DAC960_V1_BackgroundInitializationInvalid:
-		  break;
-		case DAC960_V1_BackgroundInitializationStarted:
-		  DAC960_Progress("Background Initialization Started\n",
-				  Controller);
-		  break;
-		case DAC960_V1_BackgroundInitializationInProgress:
-		  if (BlocksCompleted ==
-		      Controller->V1.LastBackgroundInitializationStatus.
-				BlocksCompleted &&
-		      LogicalDriveNumber ==
-		      Controller->V1.LastBackgroundInitializationStatus.
-				LogicalDriveNumber)
-		    break;
-		  Controller->EphemeralProgressMessage = true;
-		  DAC960_Progress("Background Initialization in Progress: "
-				  "Logical Drive %d (/dev/rd/c%dd%d) "
-				  "%d%% completed\n",
-				  Controller, LogicalDriveNumber,
-				  Controller->ControllerNumber,
-				  LogicalDriveNumber,
-				  (100 * (BlocksCompleted >> 7))
-				  / (LogicalDriveSize >> 7));
-		  Controller->EphemeralProgressMessage = false;
-		  break;
-		case DAC960_V1_BackgroundInitializationSuspended:
-		  DAC960_Progress("Background Initialization Suspended\n",
-				  Controller);
-		  break;
-		case DAC960_V1_BackgroundInitializationCancelled:
-		  DAC960_Progress("Background Initialization Cancelled\n",
-				  Controller);
-		  break;
-		}
-	      memcpy(&Controller->V1.LastBackgroundInitializationStatus,
-		     Controller->V1.BackgroundInitializationStatus,
-		     sizeof(DAC960_V1_BackgroundInitializationStatus_T));
-	      break;
-	    case DAC960_V1_BackgroundInitSuccessful:
-	      if (Controller->V1.BackgroundInitializationStatus->Status ==
-		  DAC960_V1_BackgroundInitializationInProgress)
-		DAC960_Progress("Background Initialization "
-				"Completed Successfully\n", Controller);
-	      Controller->V1.BackgroundInitializationStatus->Status =
-		DAC960_V1_BackgroundInitializationInvalid;
-	      break;
-	    case DAC960_V1_BackgroundInitAborted:
-	      if (Controller->V1.BackgroundInitializationStatus->Status ==
-		  DAC960_V1_BackgroundInitializationInProgress)
-		DAC960_Progress("Background Initialization Aborted\n",
-				Controller);
-	      Controller->V1.BackgroundInitializationStatus->Status =
-		DAC960_V1_BackgroundInitializationInvalid;
-	      break;
-	    case DAC960_V1_NoBackgroundInitInProgress:
-	      break;
-	    }
-	} 
-      else if (CommandOpcode == DAC960_V1_DCDB)
-	{
-	   /*
-	     This is a bit ugly.
-
-	     The InquiryStandardData and 
-	     the InquiryUntitSerialNumber information
-	     retrieval operations BOTH use the DAC960_V1_DCDB
-	     commands.  the test above can't distinguish between
-	     these two cases.
-
-	     Instead, we rely on the order of code later in this
-             function to ensure that DeviceInquiryInformation commands
-             are submitted before DeviceSerialNumber commands.
-	   */
-	   if (Controller->V1.NeedDeviceInquiryInformation)
-	     {
-	        DAC960_SCSI_Inquiry_T *InquiryStandardData =
-			&Controller->V1.InquiryStandardData
-				[Controller->V1.DeviceStateChannel]
-				[Controller->V1.DeviceStateTargetID];
-	        if (CommandStatus != DAC960_V1_NormalCompletion)
-		   {
-			memset(InquiryStandardData, 0,
-				sizeof(DAC960_SCSI_Inquiry_T));
-	      		InquiryStandardData->PeripheralDeviceType = 0x1F;
-		    }
-	         else
-			memcpy(InquiryStandardData, 
-				Controller->V1.NewInquiryStandardData,
-				sizeof(DAC960_SCSI_Inquiry_T));
-	         Controller->V1.NeedDeviceInquiryInformation = false;
-              }
-	   else if (Controller->V1.NeedDeviceSerialNumberInformation) 
-              {
-	        DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
-		  &Controller->V1.InquiryUnitSerialNumber
-				[Controller->V1.DeviceStateChannel]
-				[Controller->V1.DeviceStateTargetID];
-	         if (CommandStatus != DAC960_V1_NormalCompletion)
-		   {
-			memset(InquiryUnitSerialNumber, 0,
-				sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
-	      		InquiryUnitSerialNumber->PeripheralDeviceType = 0x1F;
-		    }
-	          else
-			memcpy(InquiryUnitSerialNumber, 
-				Controller->V1.NewInquiryUnitSerialNumber,
-				sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
-	      Controller->V1.NeedDeviceSerialNumberInformation = false;
-	     }
-	}
-      /*
-        Begin submitting new monitoring commands.
-       */
-      if (Controller->V1.NewEventLogSequenceNumber
-	  - Controller->V1.OldEventLogSequenceNumber > 0)
-	{
-	  Command->V1.CommandMailbox.Type3E.CommandOpcode =
-	    DAC960_V1_PerformEventLogOperation;
-	  Command->V1.CommandMailbox.Type3E.OperationType =
-	    DAC960_V1_GetEventLogEntry;
-	  Command->V1.CommandMailbox.Type3E.OperationQualifier = 1;
-	  Command->V1.CommandMailbox.Type3E.SequenceNumber =
-	    Controller->V1.OldEventLogSequenceNumber;
-	  Command->V1.CommandMailbox.Type3E.BusAddress =
-	    	Controller->V1.EventLogEntryDMA;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      if (Controller->V1.NeedErrorTableInformation)
-	{
-	  Controller->V1.NeedErrorTableInformation = false;
-	  Command->V1.CommandMailbox.Type3.CommandOpcode =
-	    DAC960_V1_GetErrorTable;
-	  Command->V1.CommandMailbox.Type3.BusAddress =
-	    	Controller->V1.NewErrorTableDMA;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      if (Controller->V1.NeedRebuildProgress &&
-	  Controller->V1.RebuildProgressFirst)
-	{
-	  Controller->V1.NeedRebuildProgress = false;
-	  Command->V1.CommandMailbox.Type3.CommandOpcode =
-	    DAC960_V1_GetRebuildProgress;
-	  Command->V1.CommandMailbox.Type3.BusAddress =
-	    Controller->V1.RebuildProgressDMA;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      if (Controller->V1.NeedDeviceStateInformation)
-	{
-	  if (Controller->V1.NeedDeviceInquiryInformation)
-	    {
-	      DAC960_V1_DCDB_T *DCDB = Controller->V1.MonitoringDCDB;
-	      dma_addr_t DCDB_DMA = Controller->V1.MonitoringDCDB_DMA;
-
-	      dma_addr_t NewInquiryStandardDataDMA =
-		Controller->V1.NewInquiryStandardDataDMA;
-
-	      Command->V1.CommandMailbox.Type3.CommandOpcode = DAC960_V1_DCDB;
-	      Command->V1.CommandMailbox.Type3.BusAddress = DCDB_DMA;
-	      DCDB->Channel = Controller->V1.DeviceStateChannel;
-	      DCDB->TargetID = Controller->V1.DeviceStateTargetID;
-	      DCDB->Direction = DAC960_V1_DCDB_DataTransferDeviceToSystem;
-	      DCDB->EarlyStatus = false;
-	      DCDB->Timeout = DAC960_V1_DCDB_Timeout_10_seconds;
-	      DCDB->NoAutomaticRequestSense = false;
-	      DCDB->DisconnectPermitted = true;
-	      DCDB->TransferLength = sizeof(DAC960_SCSI_Inquiry_T);
-	      DCDB->BusAddress = NewInquiryStandardDataDMA;
-	      DCDB->CDBLength = 6;
-	      DCDB->TransferLengthHigh4 = 0;
-	      DCDB->SenseLength = sizeof(DCDB->SenseData);
-	      DCDB->CDB[0] = 0x12; /* INQUIRY */
-	      DCDB->CDB[1] = 0; /* EVPD = 0 */
-	      DCDB->CDB[2] = 0; /* Page Code */
-	      DCDB->CDB[3] = 0; /* Reserved */
-	      DCDB->CDB[4] = sizeof(DAC960_SCSI_Inquiry_T);
-	      DCDB->CDB[5] = 0; /* Control */
-	      DAC960_QueueCommand(Command);
-	      return;
-	    }
-	  if (Controller->V1.NeedDeviceSerialNumberInformation)
-	    {
-	      DAC960_V1_DCDB_T *DCDB = Controller->V1.MonitoringDCDB;
-	      dma_addr_t DCDB_DMA = Controller->V1.MonitoringDCDB_DMA;
-	      dma_addr_t NewInquiryUnitSerialNumberDMA = 
-			Controller->V1.NewInquiryUnitSerialNumberDMA;
-
-	      Command->V1.CommandMailbox.Type3.CommandOpcode = DAC960_V1_DCDB;
-	      Command->V1.CommandMailbox.Type3.BusAddress = DCDB_DMA;
-	      DCDB->Channel = Controller->V1.DeviceStateChannel;
-	      DCDB->TargetID = Controller->V1.DeviceStateTargetID;
-	      DCDB->Direction = DAC960_V1_DCDB_DataTransferDeviceToSystem;
-	      DCDB->EarlyStatus = false;
-	      DCDB->Timeout = DAC960_V1_DCDB_Timeout_10_seconds;
-	      DCDB->NoAutomaticRequestSense = false;
-	      DCDB->DisconnectPermitted = true;
-	      DCDB->TransferLength =
-		sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
-	      DCDB->BusAddress = NewInquiryUnitSerialNumberDMA;
-	      DCDB->CDBLength = 6;
-	      DCDB->TransferLengthHigh4 = 0;
-	      DCDB->SenseLength = sizeof(DCDB->SenseData);
-	      DCDB->CDB[0] = 0x12; /* INQUIRY */
-	      DCDB->CDB[1] = 1; /* EVPD = 1 */
-	      DCDB->CDB[2] = 0x80; /* Page Code */
-	      DCDB->CDB[3] = 0; /* Reserved */
-	      DCDB->CDB[4] = sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T);
-	      DCDB->CDB[5] = 0; /* Control */
-	      DAC960_QueueCommand(Command);
-	      return;
-	    }
-	  if (Controller->V1.StartDeviceStateScan)
-	    {
-	      Controller->V1.DeviceStateChannel = 0;
-	      Controller->V1.DeviceStateTargetID = 0;
-	      Controller->V1.StartDeviceStateScan = false;
-	    }
-	  else if (++Controller->V1.DeviceStateTargetID == Controller->Targets)
-	    {
-	      Controller->V1.DeviceStateChannel++;
-	      Controller->V1.DeviceStateTargetID = 0;
-	    }
-	  if (Controller->V1.DeviceStateChannel < Controller->Channels)
-	    {
-	      Controller->V1.NewDeviceState->DeviceState =
-		DAC960_V1_Device_Dead;
-	      Command->V1.CommandMailbox.Type3D.CommandOpcode =
-		DAC960_V1_GetDeviceState;
-	      Command->V1.CommandMailbox.Type3D.Channel =
-		Controller->V1.DeviceStateChannel;
-	      Command->V1.CommandMailbox.Type3D.TargetID =
-		Controller->V1.DeviceStateTargetID;
-	      Command->V1.CommandMailbox.Type3D.BusAddress =
-		Controller->V1.NewDeviceStateDMA;
-	      DAC960_QueueCommand(Command);
-	      return;
-	    }
-	  Controller->V1.NeedDeviceStateInformation = false;
-	}
-      if (Controller->V1.NeedLogicalDriveInformation)
-	{
-	  Controller->V1.NeedLogicalDriveInformation = false;
-	  Command->V1.CommandMailbox.Type3.CommandOpcode =
-	    DAC960_V1_GetLogicalDriveInformation;
-	  Command->V1.CommandMailbox.Type3.BusAddress =
-	    Controller->V1.NewLogicalDriveInformationDMA;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      if (Controller->V1.NeedRebuildProgress)
-	{
-	  Controller->V1.NeedRebuildProgress = false;
-	  Command->V1.CommandMailbox.Type3.CommandOpcode =
-	    DAC960_V1_GetRebuildProgress;
-	  Command->V1.CommandMailbox.Type3.BusAddress =
-	    	Controller->V1.RebuildProgressDMA;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      if (Controller->V1.NeedConsistencyCheckProgress)
-	{
-	  Controller->V1.NeedConsistencyCheckProgress = false;
-	  Command->V1.CommandMailbox.Type3.CommandOpcode =
-	    DAC960_V1_RebuildStat;
-	  Command->V1.CommandMailbox.Type3.BusAddress =
-	    Controller->V1.RebuildProgressDMA;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      if (Controller->V1.NeedBackgroundInitializationStatus)
-	{
-	  Controller->V1.NeedBackgroundInitializationStatus = false;
-	  Command->V1.CommandMailbox.Type3B.CommandOpcode =
-	    DAC960_V1_BackgroundInitializationControl;
-	  Command->V1.CommandMailbox.Type3B.CommandOpcode2 = 0x20;
-	  Command->V1.CommandMailbox.Type3B.BusAddress =
-	    Controller->V1.BackgroundInitializationStatusDMA;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      Controller->MonitoringTimerCount++;
-      Controller->MonitoringTimer.expires =
-	jiffies + DAC960_MonitoringTimerInterval;
-      	add_timer(&Controller->MonitoringTimer);
-    }
-  if (CommandType == DAC960_ImmediateCommand)
-    {
-      complete(Command->Completion);
-      Command->Completion = NULL;
-      return;
-    }
-  if (CommandType == DAC960_QueuedCommand)
-    {
-      DAC960_V1_KernelCommand_T *KernelCommand = Command->V1.KernelCommand;
-      KernelCommand->CommandStatus = Command->V1.CommandStatus;
-      Command->V1.KernelCommand = NULL;
-      if (CommandOpcode == DAC960_V1_DCDB)
-	Controller->V1.DirectCommandActive[KernelCommand->DCDB->Channel]
-					  [KernelCommand->DCDB->TargetID] =
-	  false;
-      DAC960_DeallocateCommand(Command);
-      KernelCommand->CompletionFunction(KernelCommand);
-      return;
-    }
-  /*
-    Queue a Status Monitoring Command to the Controller using the just
-    completed Command if one was deferred previously due to lack of a
-    free Command when the Monitoring Timer Function was called.
-  */
-  if (Controller->MonitoringCommandDeferred)
-    {
-      Controller->MonitoringCommandDeferred = false;
-      DAC960_V1_QueueMonitoringCommand(Command);
-      return;
-    }
-  /*
-    Deallocate the Command.
-  */
-  DAC960_DeallocateCommand(Command);
-  /*
-    Wake up any processes waiting on a free Command.
-  */
-  wake_up(&Controller->CommandWaitQueue);
-}
-
-
-/*
-  DAC960_V2_ReadWriteError prints an appropriate error message for Command
-  when an error occurs on a Read or Write operation.
-*/
-
-static void DAC960_V2_ReadWriteError(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  static const unsigned char *SenseErrors[] = {
-    "NO SENSE", "RECOVERED ERROR",
-    "NOT READY", "MEDIUM ERROR",
-    "HARDWARE ERROR", "ILLEGAL REQUEST",
-    "UNIT ATTENTION", "DATA PROTECT",
-    "BLANK CHECK", "VENDOR-SPECIFIC",
-    "COPY ABORTED", "ABORTED COMMAND",
-    "EQUAL", "VOLUME OVERFLOW",
-    "MISCOMPARE", "RESERVED"
-  };
-  unsigned char *CommandName = "UNKNOWN";
-  switch (Command->CommandType)
-    {
-    case DAC960_ReadCommand:
-    case DAC960_ReadRetryCommand:
-      CommandName = "READ";
-      break;
-    case DAC960_WriteCommand:
-    case DAC960_WriteRetryCommand:
-      CommandName = "WRITE";
-      break;
-    case DAC960_MonitoringCommand:
-    case DAC960_ImmediateCommand:
-    case DAC960_QueuedCommand:
-      break;
-    }
-  DAC960_Error("Error Condition %s on %s:\n", Controller,
-	       SenseErrors[Command->V2.RequestSense->SenseKey], CommandName);
-  DAC960_Error("  /dev/rd/c%dd%d:   absolute blocks %u..%u\n",
-	       Controller, Controller->ControllerNumber,
-	       Command->LogicalDriveNumber, Command->BlockNumber,
-	       Command->BlockNumber + Command->BlockCount - 1);
-}
-
-
-/*
-  DAC960_V2_ReportEvent prints an appropriate message when a Controller Event
-  occurs.
-*/
-
-static void DAC960_V2_ReportEvent(DAC960_Controller_T *Controller,
-				  DAC960_V2_Event_T *Event)
-{
-  DAC960_SCSI_RequestSense_T *RequestSense =
-    (DAC960_SCSI_RequestSense_T *) &Event->RequestSenseData;
-  unsigned char MessageBuffer[DAC960_LineBufferSize];
-  static struct { int EventCode; unsigned char *EventMessage; } EventList[] =
-    { /* Physical Device Events (0x0000 - 0x007F) */
-      { 0x0001, "P Online" },
-      { 0x0002, "P Standby" },
-      { 0x0005, "P Automatic Rebuild Started" },
-      { 0x0006, "P Manual Rebuild Started" },
-      { 0x0007, "P Rebuild Completed" },
-      { 0x0008, "P Rebuild Cancelled" },
-      { 0x0009, "P Rebuild Failed for Unknown Reasons" },
-      { 0x000A, "P Rebuild Failed due to New Physical Device" },
-      { 0x000B, "P Rebuild Failed due to Logical Drive Failure" },
-      { 0x000C, "S Offline" },
-      { 0x000D, "P Found" },
-      { 0x000E, "P Removed" },
-      { 0x000F, "P Unconfigured" },
-      { 0x0010, "P Expand Capacity Started" },
-      { 0x0011, "P Expand Capacity Completed" },
-      { 0x0012, "P Expand Capacity Failed" },
-      { 0x0013, "P Command Timed Out" },
-      { 0x0014, "P Command Aborted" },
-      { 0x0015, "P Command Retried" },
-      { 0x0016, "P Parity Error" },
-      { 0x0017, "P Soft Error" },
-      { 0x0018, "P Miscellaneous Error" },
-      { 0x0019, "P Reset" },
-      { 0x001A, "P Active Spare Found" },
-      { 0x001B, "P Warm Spare Found" },
-      { 0x001C, "S Sense Data Received" },
-      { 0x001D, "P Initialization Started" },
-      { 0x001E, "P Initialization Completed" },
-      { 0x001F, "P Initialization Failed" },
-      { 0x0020, "P Initialization Cancelled" },
-      { 0x0021, "P Failed because Write Recovery Failed" },
-      { 0x0022, "P Failed because SCSI Bus Reset Failed" },
-      { 0x0023, "P Failed because of Double Check Condition" },
-      { 0x0024, "P Failed because Device Cannot Be Accessed" },
-      { 0x0025, "P Failed because of Gross Error on SCSI Processor" },
-      { 0x0026, "P Failed because of Bad Tag from Device" },
-      { 0x0027, "P Failed because of Command Timeout" },
-      { 0x0028, "P Failed because of System Reset" },
-      { 0x0029, "P Failed because of Busy Status or Parity Error" },
-      { 0x002A, "P Failed because Host Set Device to Failed State" },
-      { 0x002B, "P Failed because of Selection Timeout" },
-      { 0x002C, "P Failed because of SCSI Bus Phase Error" },
-      { 0x002D, "P Failed because Device Returned Unknown Status" },
-      { 0x002E, "P Failed because Device Not Ready" },
-      { 0x002F, "P Failed because Device Not Found at Startup" },
-      { 0x0030, "P Failed because COD Write Operation Failed" },
-      { 0x0031, "P Failed because BDT Write Operation Failed" },
-      { 0x0039, "P Missing at Startup" },
-      { 0x003A, "P Start Rebuild Failed due to Physical Drive Too Small" },
-      { 0x003C, "P Temporarily Offline Device Automatically Made Online" },
-      { 0x003D, "P Standby Rebuild Started" },
-      /* Logical Device Events (0x0080 - 0x00FF) */
-      { 0x0080, "M Consistency Check Started" },
-      { 0x0081, "M Consistency Check Completed" },
-      { 0x0082, "M Consistency Check Cancelled" },
-      { 0x0083, "M Consistency Check Completed With Errors" },
-      { 0x0084, "M Consistency Check Failed due to Logical Drive Failure" },
-      { 0x0085, "M Consistency Check Failed due to Physical Device Failure" },
-      { 0x0086, "L Offline" },
-      { 0x0087, "L Critical" },
-      { 0x0088, "L Online" },
-      { 0x0089, "M Automatic Rebuild Started" },
-      { 0x008A, "M Manual Rebuild Started" },
-      { 0x008B, "M Rebuild Completed" },
-      { 0x008C, "M Rebuild Cancelled" },
-      { 0x008D, "M Rebuild Failed for Unknown Reasons" },
-      { 0x008E, "M Rebuild Failed due to New Physical Device" },
-      { 0x008F, "M Rebuild Failed due to Logical Drive Failure" },
-      { 0x0090, "M Initialization Started" },
-      { 0x0091, "M Initialization Completed" },
-      { 0x0092, "M Initialization Cancelled" },
-      { 0x0093, "M Initialization Failed" },
-      { 0x0094, "L Found" },
-      { 0x0095, "L Deleted" },
-      { 0x0096, "M Expand Capacity Started" },
-      { 0x0097, "M Expand Capacity Completed" },
-      { 0x0098, "M Expand Capacity Failed" },
-      { 0x0099, "L Bad Block Found" },
-      { 0x009A, "L Size Changed" },
-      { 0x009B, "L Type Changed" },
-      { 0x009C, "L Bad Data Block Found" },
-      { 0x009E, "L Read of Data Block in BDT" },
-      { 0x009F, "L Write Back Data for Disk Block Lost" },
-      { 0x00A0, "L Temporarily Offline RAID-5/3 Drive Made Online" },
-      { 0x00A1, "L Temporarily Offline RAID-6/1/0/7 Drive Made Online" },
-      { 0x00A2, "L Standby Rebuild Started" },
-      /* Fault Management Events (0x0100 - 0x017F) */
-      { 0x0140, "E Fan %d Failed" },
-      { 0x0141, "E Fan %d OK" },
-      { 0x0142, "E Fan %d Not Present" },
-      { 0x0143, "E Power Supply %d Failed" },
-      { 0x0144, "E Power Supply %d OK" },
-      { 0x0145, "E Power Supply %d Not Present" },
-      { 0x0146, "E Temperature Sensor %d Temperature Exceeds Safe Limit" },
-      { 0x0147, "E Temperature Sensor %d Temperature Exceeds Working Limit" },
-      { 0x0148, "E Temperature Sensor %d Temperature Normal" },
-      { 0x0149, "E Temperature Sensor %d Not Present" },
-      { 0x014A, "E Enclosure Management Unit %d Access Critical" },
-      { 0x014B, "E Enclosure Management Unit %d Access OK" },
-      { 0x014C, "E Enclosure Management Unit %d Access Offline" },
-      /* Controller Events (0x0180 - 0x01FF) */
-      { 0x0181, "C Cache Write Back Error" },
-      { 0x0188, "C Battery Backup Unit Found" },
-      { 0x0189, "C Battery Backup Unit Charge Level Low" },
-      { 0x018A, "C Battery Backup Unit Charge Level OK" },
-      { 0x0193, "C Installation Aborted" },
-      { 0x0195, "C Battery Backup Unit Physically Removed" },
-      { 0x0196, "C Memory Error During Warm Boot" },
-      { 0x019E, "C Memory Soft ECC Error Corrected" },
-      { 0x019F, "C Memory Hard ECC Error Corrected" },
-      { 0x01A2, "C Battery Backup Unit Failed" },
-      { 0x01AB, "C Mirror Race Recovery Failed" },
-      { 0x01AC, "C Mirror Race on Critical Drive" },
-      /* Controller Internal Processor Events */
-      { 0x0380, "C Internal Controller Hung" },
-      { 0x0381, "C Internal Controller Firmware Breakpoint" },
-      { 0x0390, "C Internal Controller i960 Processor Specific Error" },
-      { 0x03A0, "C Internal Controller StrongARM Processor Specific Error" },
-      { 0, "" } };
-  int EventListIndex = 0, EventCode;
-  unsigned char EventType, *EventMessage;
-  if (Event->EventCode == 0x1C &&
-      RequestSense->SenseKey == DAC960_SenseKey_VendorSpecific &&
-      (RequestSense->AdditionalSenseCode == 0x80 ||
-       RequestSense->AdditionalSenseCode == 0x81))
-    Event->EventCode = ((RequestSense->AdditionalSenseCode - 0x80) << 8) |
-		       RequestSense->AdditionalSenseCodeQualifier;
-  while (true)
-    {
-      EventCode = EventList[EventListIndex].EventCode;
-      if (EventCode == Event->EventCode || EventCode == 0) break;
-      EventListIndex++;
-    }
-  EventType = EventList[EventListIndex].EventMessage[0];
-  EventMessage = &EventList[EventListIndex].EventMessage[2];
-  if (EventCode == 0)
-    {
-      DAC960_Critical("Unknown Controller Event Code %04X\n",
-		      Controller, Event->EventCode);
-      return;
-    }
-  switch (EventType)
-    {
-    case 'P':
-      DAC960_Critical("Physical Device %d:%d %s\n", Controller,
-		      Event->Channel, Event->TargetID, EventMessage);
-      break;
-    case 'L':
-      DAC960_Critical("Logical Drive %d (/dev/rd/c%dd%d) %s\n", Controller,
-		      Event->LogicalUnit, Controller->ControllerNumber,
-		      Event->LogicalUnit, EventMessage);
-      break;
-    case 'M':
-      DAC960_Progress("Logical Drive %d (/dev/rd/c%dd%d) %s\n", Controller,
-		      Event->LogicalUnit, Controller->ControllerNumber,
-		      Event->LogicalUnit, EventMessage);
-      break;
-    case 'S':
-      if (RequestSense->SenseKey == DAC960_SenseKey_NoSense ||
-	  (RequestSense->SenseKey == DAC960_SenseKey_NotReady &&
-	   RequestSense->AdditionalSenseCode == 0x04 &&
-	   (RequestSense->AdditionalSenseCodeQualifier == 0x01 ||
-	    RequestSense->AdditionalSenseCodeQualifier == 0x02)))
-	break;
-      DAC960_Critical("Physical Device %d:%d %s\n", Controller,
-		      Event->Channel, Event->TargetID, EventMessage);
-      DAC960_Critical("Physical Device %d:%d Request Sense: "
-		      "Sense Key = %X, ASC = %02X, ASCQ = %02X\n",
-		      Controller,
-		      Event->Channel,
-		      Event->TargetID,
-		      RequestSense->SenseKey,
-		      RequestSense->AdditionalSenseCode,
-		      RequestSense->AdditionalSenseCodeQualifier);
-      DAC960_Critical("Physical Device %d:%d Request Sense: "
-		      "Information = %02X%02X%02X%02X "
-		      "%02X%02X%02X%02X\n",
-		      Controller,
-		      Event->Channel,
-		      Event->TargetID,
-		      RequestSense->Information[0],
-		      RequestSense->Information[1],
-		      RequestSense->Information[2],
-		      RequestSense->Information[3],
-		      RequestSense->CommandSpecificInformation[0],
-		      RequestSense->CommandSpecificInformation[1],
-		      RequestSense->CommandSpecificInformation[2],
-		      RequestSense->CommandSpecificInformation[3]);
-      break;
-    case 'E':
-      if (Controller->SuppressEnclosureMessages) break;
-      sprintf(MessageBuffer, EventMessage, Event->LogicalUnit);
-      DAC960_Critical("Enclosure %d %s\n", Controller,
-		      Event->TargetID, MessageBuffer);
-      break;
-    case 'C':
-      DAC960_Critical("Controller %s\n", Controller, EventMessage);
-      break;
-    default:
-      DAC960_Critical("Unknown Controller Event Code %04X\n",
-		      Controller, Event->EventCode);
-      break;
-    }
-}
-
-
-/*
-  DAC960_V2_ReportProgress prints an appropriate progress message for
-  Logical Device Long Operations.
-*/
-
-static void DAC960_V2_ReportProgress(DAC960_Controller_T *Controller,
-				     unsigned char *MessageString,
-				     unsigned int LogicalDeviceNumber,
-				     unsigned long BlocksCompleted,
-				     unsigned long LogicalDeviceSize)
-{
-  Controller->EphemeralProgressMessage = true;
-  DAC960_Progress("%s in Progress: Logical Drive %d (/dev/rd/c%dd%d) "
-		  "%d%% completed\n", Controller,
-		  MessageString,
-		  LogicalDeviceNumber,
-		  Controller->ControllerNumber,
-		  LogicalDeviceNumber,
-		  (100 * (BlocksCompleted >> 7)) / (LogicalDeviceSize >> 7));
-  Controller->EphemeralProgressMessage = false;
-}
-
-
-/*
-  DAC960_V2_ProcessCompletedCommand performs completion processing for Command
-  for DAC960 V2 Firmware Controllers.
-*/
-
-static void DAC960_V2_ProcessCompletedCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  DAC960_CommandType_T CommandType = Command->CommandType;
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_IOCTL_Opcode_T IOCTLOpcode = CommandMailbox->Common.IOCTL_Opcode;
-  DAC960_V2_CommandOpcode_T CommandOpcode = CommandMailbox->SCSI_10.CommandOpcode;
-  DAC960_V2_CommandStatus_T CommandStatus = Command->V2.CommandStatus;
-
-  if (CommandType == DAC960_ReadCommand ||
-      CommandType == DAC960_WriteCommand)
-    {
-
-#ifdef FORCE_RETRY_DEBUG
-      CommandStatus = DAC960_V2_AbormalCompletion;
-#endif
-      Command->V2.RequestSense->SenseKey = DAC960_SenseKey_MediumError;
-
-      if (CommandStatus == DAC960_V2_NormalCompletion) {
-
-		if (!DAC960_ProcessCompletedRequest(Command, true))
-			BUG();
-
-      } else if (Command->V2.RequestSense->SenseKey == DAC960_SenseKey_MediumError)
-	{
-	  /*
-	   * break the command down into pieces and resubmit each
-	   * piece, hoping that some of them will succeed.
-	   */
-	   DAC960_queue_partial_rw(Command);
-	   return;
-	}
-      else
-	{
-	  if (Command->V2.RequestSense->SenseKey != DAC960_SenseKey_NotReady)
-	    DAC960_V2_ReadWriteError(Command);
-	  /*
-	    Perform completion processing for all buffers in this I/O Request.
-	  */
-          (void)DAC960_ProcessCompletedRequest(Command, false);
-	}
-    }
-  else if (CommandType == DAC960_ReadRetryCommand ||
-	   CommandType == DAC960_WriteRetryCommand)
-    {
-      bool normal_completion;
-
-#ifdef FORCE_RETRY_FAILURE_DEBUG
-      static int retry_count = 1;
-#endif
-      /*
-        Perform completion processing for the portion that was
-	retried, and submit the next portion, if any.
-      */
-      normal_completion = true;
-      if (CommandStatus != DAC960_V2_NormalCompletion) {
-	normal_completion = false;
-	if (Command->V2.RequestSense->SenseKey != DAC960_SenseKey_NotReady)
-	    DAC960_V2_ReadWriteError(Command);
-      }
-
-#ifdef FORCE_RETRY_FAILURE_DEBUG
-      if (!(++retry_count % 10000)) {
-	      printk("V2 error retry failure test\n");
-	      normal_completion = false;
-	      DAC960_V2_ReadWriteError(Command);
-      }
-#endif
-
-      if (!DAC960_ProcessCompletedRequest(Command, normal_completion)) {
-		DAC960_queue_partial_rw(Command);
-        	return;
-      }
-    }
-  else if (CommandType == DAC960_MonitoringCommand)
-    {
-      if (Controller->ShutdownMonitoringTimer)
-	      return;
-      if (IOCTLOpcode == DAC960_V2_GetControllerInfo)
-	{
-	  DAC960_V2_ControllerInfo_T *NewControllerInfo =
-	    Controller->V2.NewControllerInformation;
-	  DAC960_V2_ControllerInfo_T *ControllerInfo =
-	    &Controller->V2.ControllerInformation;
-	  Controller->LogicalDriveCount =
-	    NewControllerInfo->LogicalDevicesPresent;
-	  Controller->V2.NeedLogicalDeviceInformation = true;
-	  Controller->V2.NeedPhysicalDeviceInformation = true;
-	  Controller->V2.StartLogicalDeviceInformationScan = true;
-	  Controller->V2.StartPhysicalDeviceInformationScan = true;
-	  Controller->MonitoringAlertMode =
-	    (NewControllerInfo->LogicalDevicesCritical > 0 ||
-	     NewControllerInfo->LogicalDevicesOffline > 0 ||
-	     NewControllerInfo->PhysicalDisksCritical > 0 ||
-	     NewControllerInfo->PhysicalDisksOffline > 0);
-	  memcpy(ControllerInfo, NewControllerInfo,
-		 sizeof(DAC960_V2_ControllerInfo_T));
-	}
-      else if (IOCTLOpcode == DAC960_V2_GetEvent)
-	{
-	  if (CommandStatus == DAC960_V2_NormalCompletion) {
-	    DAC960_V2_ReportEvent(Controller, Controller->V2.Event);
-	  }
-	  Controller->V2.NextEventSequenceNumber++;
-	}
-      else if (IOCTLOpcode == DAC960_V2_GetPhysicalDeviceInfoValid &&
-	       CommandStatus == DAC960_V2_NormalCompletion)
-	{
-	  DAC960_V2_PhysicalDeviceInfo_T *NewPhysicalDeviceInfo =
-	    Controller->V2.NewPhysicalDeviceInformation;
-	  unsigned int PhysicalDeviceIndex = Controller->V2.PhysicalDeviceIndex;
-	  DAC960_V2_PhysicalDeviceInfo_T *PhysicalDeviceInfo =
-	    Controller->V2.PhysicalDeviceInformation[PhysicalDeviceIndex];
-	  DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
-	    Controller->V2.InquiryUnitSerialNumber[PhysicalDeviceIndex];
-	  unsigned int DeviceIndex;
-	  while (PhysicalDeviceInfo != NULL &&
-		 (NewPhysicalDeviceInfo->Channel >
-		  PhysicalDeviceInfo->Channel ||
-		  (NewPhysicalDeviceInfo->Channel ==
-		   PhysicalDeviceInfo->Channel &&
-		   (NewPhysicalDeviceInfo->TargetID >
-		    PhysicalDeviceInfo->TargetID ||
-		   (NewPhysicalDeviceInfo->TargetID ==
-		    PhysicalDeviceInfo->TargetID &&
-		    NewPhysicalDeviceInfo->LogicalUnit >
-		    PhysicalDeviceInfo->LogicalUnit)))))
-	    {
-	      DAC960_Critical("Physical Device %d:%d No Longer Exists\n",
-			      Controller,
-			      PhysicalDeviceInfo->Channel,
-			      PhysicalDeviceInfo->TargetID);
-	      Controller->V2.PhysicalDeviceInformation
-			     [PhysicalDeviceIndex] = NULL;
-	      Controller->V2.InquiryUnitSerialNumber
-			     [PhysicalDeviceIndex] = NULL;
-	      kfree(PhysicalDeviceInfo);
-	      kfree(InquiryUnitSerialNumber);
-	      for (DeviceIndex = PhysicalDeviceIndex;
-		   DeviceIndex < DAC960_V2_MaxPhysicalDevices - 1;
-		   DeviceIndex++)
-		{
-		  Controller->V2.PhysicalDeviceInformation[DeviceIndex] =
-		    Controller->V2.PhysicalDeviceInformation[DeviceIndex+1];
-		  Controller->V2.InquiryUnitSerialNumber[DeviceIndex] =
-		    Controller->V2.InquiryUnitSerialNumber[DeviceIndex+1];
-		}
-	      Controller->V2.PhysicalDeviceInformation
-			     [DAC960_V2_MaxPhysicalDevices-1] = NULL;
-	      Controller->V2.InquiryUnitSerialNumber
-			     [DAC960_V2_MaxPhysicalDevices-1] = NULL;
-	      PhysicalDeviceInfo =
-		Controller->V2.PhysicalDeviceInformation[PhysicalDeviceIndex];
-	      InquiryUnitSerialNumber =
-		Controller->V2.InquiryUnitSerialNumber[PhysicalDeviceIndex];
-	    }
-	  if (PhysicalDeviceInfo == NULL ||
-	      (NewPhysicalDeviceInfo->Channel !=
-	       PhysicalDeviceInfo->Channel) ||
-	      (NewPhysicalDeviceInfo->TargetID !=
-	       PhysicalDeviceInfo->TargetID) ||
-	      (NewPhysicalDeviceInfo->LogicalUnit !=
-	       PhysicalDeviceInfo->LogicalUnit))
-	    {
-	      PhysicalDeviceInfo =
-		kmalloc(sizeof(DAC960_V2_PhysicalDeviceInfo_T), GFP_ATOMIC);
-	      InquiryUnitSerialNumber =
-		  kmalloc(sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T),
-			  GFP_ATOMIC);
-	      if (InquiryUnitSerialNumber == NULL ||
-		  PhysicalDeviceInfo == NULL)
-		{
-		  kfree(InquiryUnitSerialNumber);
-		  InquiryUnitSerialNumber = NULL;
-		  kfree(PhysicalDeviceInfo);
-		  PhysicalDeviceInfo = NULL;
-		}
-	      DAC960_Critical("Physical Device %d:%d Now Exists%s\n",
-			      Controller,
-			      NewPhysicalDeviceInfo->Channel,
-			      NewPhysicalDeviceInfo->TargetID,
-			      (PhysicalDeviceInfo != NULL
-			       ? "" : " - Allocation Failed"));
-	      if (PhysicalDeviceInfo != NULL)
-		{
-		  memset(PhysicalDeviceInfo, 0,
-			 sizeof(DAC960_V2_PhysicalDeviceInfo_T));
-		  PhysicalDeviceInfo->PhysicalDeviceState =
-		    DAC960_V2_Device_InvalidState;
-		  memset(InquiryUnitSerialNumber, 0,
-			 sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
-		  InquiryUnitSerialNumber->PeripheralDeviceType = 0x1F;
-		  for (DeviceIndex = DAC960_V2_MaxPhysicalDevices - 1;
-		       DeviceIndex > PhysicalDeviceIndex;
-		       DeviceIndex--)
-		    {
-		      Controller->V2.PhysicalDeviceInformation[DeviceIndex] =
-			Controller->V2.PhysicalDeviceInformation[DeviceIndex-1];
-		      Controller->V2.InquiryUnitSerialNumber[DeviceIndex] =
-			Controller->V2.InquiryUnitSerialNumber[DeviceIndex-1];
-		    }
-		  Controller->V2.PhysicalDeviceInformation
-				 [PhysicalDeviceIndex] =
-		    PhysicalDeviceInfo;
-		  Controller->V2.InquiryUnitSerialNumber
-				 [PhysicalDeviceIndex] =
-		    InquiryUnitSerialNumber;
-		  Controller->V2.NeedDeviceSerialNumberInformation = true;
-		}
-	    }
-	  if (PhysicalDeviceInfo != NULL)
-	    {
-	      if (NewPhysicalDeviceInfo->PhysicalDeviceState !=
-		  PhysicalDeviceInfo->PhysicalDeviceState)
-		DAC960_Critical(
-		  "Physical Device %d:%d is now %s\n", Controller,
-		  NewPhysicalDeviceInfo->Channel,
-		  NewPhysicalDeviceInfo->TargetID,
-		  (NewPhysicalDeviceInfo->PhysicalDeviceState
-		   == DAC960_V2_Device_Online
-		   ? "ONLINE"
-		   : NewPhysicalDeviceInfo->PhysicalDeviceState
-		     == DAC960_V2_Device_Rebuild
-		     ? "REBUILD"
-		     : NewPhysicalDeviceInfo->PhysicalDeviceState
-		       == DAC960_V2_Device_Missing
-		       ? "MISSING"
-		       : NewPhysicalDeviceInfo->PhysicalDeviceState
-			 == DAC960_V2_Device_Critical
-			 ? "CRITICAL"
-			 : NewPhysicalDeviceInfo->PhysicalDeviceState
-			   == DAC960_V2_Device_Dead
-			   ? "DEAD"
-			   : NewPhysicalDeviceInfo->PhysicalDeviceState
-			     == DAC960_V2_Device_SuspectedDead
-			     ? "SUSPECTED-DEAD"
-			     : NewPhysicalDeviceInfo->PhysicalDeviceState
-			       == DAC960_V2_Device_CommandedOffline
-			       ? "COMMANDED-OFFLINE"
-			       : NewPhysicalDeviceInfo->PhysicalDeviceState
-				 == DAC960_V2_Device_Standby
-				 ? "STANDBY" : "UNKNOWN"));
-	      if ((NewPhysicalDeviceInfo->ParityErrors !=
-		   PhysicalDeviceInfo->ParityErrors) ||
-		  (NewPhysicalDeviceInfo->SoftErrors !=
-		   PhysicalDeviceInfo->SoftErrors) ||
-		  (NewPhysicalDeviceInfo->HardErrors !=
-		   PhysicalDeviceInfo->HardErrors) ||
-		  (NewPhysicalDeviceInfo->MiscellaneousErrors !=
-		   PhysicalDeviceInfo->MiscellaneousErrors) ||
-		  (NewPhysicalDeviceInfo->CommandTimeouts !=
-		   PhysicalDeviceInfo->CommandTimeouts) ||
-		  (NewPhysicalDeviceInfo->Retries !=
-		   PhysicalDeviceInfo->Retries) ||
-		  (NewPhysicalDeviceInfo->Aborts !=
-		   PhysicalDeviceInfo->Aborts) ||
-		  (NewPhysicalDeviceInfo->PredictedFailuresDetected !=
-		   PhysicalDeviceInfo->PredictedFailuresDetected))
-		{
-		  DAC960_Critical("Physical Device %d:%d Errors: "
-				  "Parity = %d, Soft = %d, "
-				  "Hard = %d, Misc = %d\n",
-				  Controller,
-				  NewPhysicalDeviceInfo->Channel,
-				  NewPhysicalDeviceInfo->TargetID,
-				  NewPhysicalDeviceInfo->ParityErrors,
-				  NewPhysicalDeviceInfo->SoftErrors,
-				  NewPhysicalDeviceInfo->HardErrors,
-				  NewPhysicalDeviceInfo->MiscellaneousErrors);
-		  DAC960_Critical("Physical Device %d:%d Errors: "
-				  "Timeouts = %d, Retries = %d, "
-				  "Aborts = %d, Predicted = %d\n",
-				  Controller,
-				  NewPhysicalDeviceInfo->Channel,
-				  NewPhysicalDeviceInfo->TargetID,
-				  NewPhysicalDeviceInfo->CommandTimeouts,
-				  NewPhysicalDeviceInfo->Retries,
-				  NewPhysicalDeviceInfo->Aborts,
-				  NewPhysicalDeviceInfo
-				  ->PredictedFailuresDetected);
-		}
-	      if ((PhysicalDeviceInfo->PhysicalDeviceState
-		   == DAC960_V2_Device_Dead ||
-		   PhysicalDeviceInfo->PhysicalDeviceState
-		   == DAC960_V2_Device_InvalidState) &&
-		  NewPhysicalDeviceInfo->PhysicalDeviceState
-		  != DAC960_V2_Device_Dead)
-		Controller->V2.NeedDeviceSerialNumberInformation = true;
-	      memcpy(PhysicalDeviceInfo, NewPhysicalDeviceInfo,
-		     sizeof(DAC960_V2_PhysicalDeviceInfo_T));
-	    }
-	  NewPhysicalDeviceInfo->LogicalUnit++;
-	  Controller->V2.PhysicalDeviceIndex++;
-	}
-      else if (IOCTLOpcode == DAC960_V2_GetPhysicalDeviceInfoValid)
-	{
-	  unsigned int DeviceIndex;
-	  for (DeviceIndex = Controller->V2.PhysicalDeviceIndex;
-	       DeviceIndex < DAC960_V2_MaxPhysicalDevices;
-	       DeviceIndex++)
-	    {
-	      DAC960_V2_PhysicalDeviceInfo_T *PhysicalDeviceInfo =
-		Controller->V2.PhysicalDeviceInformation[DeviceIndex];
-	      DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
-		Controller->V2.InquiryUnitSerialNumber[DeviceIndex];
-	      if (PhysicalDeviceInfo == NULL) break;
-	      DAC960_Critical("Physical Device %d:%d No Longer Exists\n",
-			      Controller,
-			      PhysicalDeviceInfo->Channel,
-			      PhysicalDeviceInfo->TargetID);
-	      Controller->V2.PhysicalDeviceInformation[DeviceIndex] = NULL;
-	      Controller->V2.InquiryUnitSerialNumber[DeviceIndex] = NULL;
-	      kfree(PhysicalDeviceInfo);
-	      kfree(InquiryUnitSerialNumber);
-	    }
-	  Controller->V2.NeedPhysicalDeviceInformation = false;
-	}
-      else if (IOCTLOpcode == DAC960_V2_GetLogicalDeviceInfoValid &&
-	       CommandStatus == DAC960_V2_NormalCompletion)
-	{
-	  DAC960_V2_LogicalDeviceInfo_T *NewLogicalDeviceInfo =
-	    Controller->V2.NewLogicalDeviceInformation;
-	  unsigned short LogicalDeviceNumber =
-	    NewLogicalDeviceInfo->LogicalDeviceNumber;
-	  DAC960_V2_LogicalDeviceInfo_T *LogicalDeviceInfo =
-	    Controller->V2.LogicalDeviceInformation[LogicalDeviceNumber];
-	  if (LogicalDeviceInfo == NULL)
-	    {
-	      DAC960_V2_PhysicalDevice_T PhysicalDevice;
-	      PhysicalDevice.Controller = 0;
-	      PhysicalDevice.Channel = NewLogicalDeviceInfo->Channel;
-	      PhysicalDevice.TargetID = NewLogicalDeviceInfo->TargetID;
-	      PhysicalDevice.LogicalUnit = NewLogicalDeviceInfo->LogicalUnit;
-	      Controller->V2.LogicalDriveToVirtualDevice[LogicalDeviceNumber] =
-		PhysicalDevice;
-	      LogicalDeviceInfo = kmalloc(sizeof(DAC960_V2_LogicalDeviceInfo_T),
-					  GFP_ATOMIC);
-	      Controller->V2.LogicalDeviceInformation[LogicalDeviceNumber] =
-		LogicalDeviceInfo;
-	      DAC960_Critical("Logical Drive %d (/dev/rd/c%dd%d) "
-			      "Now Exists%s\n", Controller,
-			      LogicalDeviceNumber,
-			      Controller->ControllerNumber,
-			      LogicalDeviceNumber,
-			      (LogicalDeviceInfo != NULL
-			       ? "" : " - Allocation Failed"));
-	      if (LogicalDeviceInfo != NULL)
-		{
-		  memset(LogicalDeviceInfo, 0,
-			 sizeof(DAC960_V2_LogicalDeviceInfo_T));
-		  DAC960_ComputeGenericDiskInfo(Controller);
-		}
-	    }
-	  if (LogicalDeviceInfo != NULL)
-	    {
-	      unsigned long LogicalDeviceSize =
-		NewLogicalDeviceInfo->ConfigurableDeviceSize;
-	      if (NewLogicalDeviceInfo->LogicalDeviceState !=
-		  LogicalDeviceInfo->LogicalDeviceState)
-		DAC960_Critical("Logical Drive %d (/dev/rd/c%dd%d) "
-				"is now %s\n", Controller,
-				LogicalDeviceNumber,
-				Controller->ControllerNumber,
-				LogicalDeviceNumber,
-				(NewLogicalDeviceInfo->LogicalDeviceState
-				 == DAC960_V2_LogicalDevice_Online
-				 ? "ONLINE"
-				 : NewLogicalDeviceInfo->LogicalDeviceState
-				   == DAC960_V2_LogicalDevice_Critical
-				   ? "CRITICAL" : "OFFLINE"));
-	      if ((NewLogicalDeviceInfo->SoftErrors !=
-		   LogicalDeviceInfo->SoftErrors) ||
-		  (NewLogicalDeviceInfo->CommandsFailed !=
-		   LogicalDeviceInfo->CommandsFailed) ||
-		  (NewLogicalDeviceInfo->DeferredWriteErrors !=
-		   LogicalDeviceInfo->DeferredWriteErrors))
-		DAC960_Critical("Logical Drive %d (/dev/rd/c%dd%d) Errors: "
-				"Soft = %d, Failed = %d, Deferred Write = %d\n",
-				Controller, LogicalDeviceNumber,
-				Controller->ControllerNumber,
-				LogicalDeviceNumber,
-				NewLogicalDeviceInfo->SoftErrors,
-				NewLogicalDeviceInfo->CommandsFailed,
-				NewLogicalDeviceInfo->DeferredWriteErrors);
-	      if (NewLogicalDeviceInfo->ConsistencyCheckInProgress)
-		DAC960_V2_ReportProgress(Controller,
-					 "Consistency Check",
-					 LogicalDeviceNumber,
-					 NewLogicalDeviceInfo
-					 ->ConsistencyCheckBlockNumber,
-					 LogicalDeviceSize);
-	      else if (NewLogicalDeviceInfo->RebuildInProgress)
-		DAC960_V2_ReportProgress(Controller,
-					 "Rebuild",
-					 LogicalDeviceNumber,
-					 NewLogicalDeviceInfo
-					 ->RebuildBlockNumber,
-					 LogicalDeviceSize);
-	      else if (NewLogicalDeviceInfo->BackgroundInitializationInProgress)
-		DAC960_V2_ReportProgress(Controller,
-					 "Background Initialization",
-					 LogicalDeviceNumber,
-					 NewLogicalDeviceInfo
-					 ->BackgroundInitializationBlockNumber,
-					 LogicalDeviceSize);
-	      else if (NewLogicalDeviceInfo->ForegroundInitializationInProgress)
-		DAC960_V2_ReportProgress(Controller,
-					 "Foreground Initialization",
-					 LogicalDeviceNumber,
-					 NewLogicalDeviceInfo
-					 ->ForegroundInitializationBlockNumber,
-					 LogicalDeviceSize);
-	      else if (NewLogicalDeviceInfo->DataMigrationInProgress)
-		DAC960_V2_ReportProgress(Controller,
-					 "Data Migration",
-					 LogicalDeviceNumber,
-					 NewLogicalDeviceInfo
-					 ->DataMigrationBlockNumber,
-					 LogicalDeviceSize);
-	      else if (NewLogicalDeviceInfo->PatrolOperationInProgress)
-		DAC960_V2_ReportProgress(Controller,
-					 "Patrol Operation",
-					 LogicalDeviceNumber,
-					 NewLogicalDeviceInfo
-					 ->PatrolOperationBlockNumber,
-					 LogicalDeviceSize);
-	      if (LogicalDeviceInfo->BackgroundInitializationInProgress &&
-		  !NewLogicalDeviceInfo->BackgroundInitializationInProgress)
-		DAC960_Progress("Logical Drive %d (/dev/rd/c%dd%d) "
-				"Background Initialization %s\n",
-				Controller,
-				LogicalDeviceNumber,
-				Controller->ControllerNumber,
-				LogicalDeviceNumber,
-				(NewLogicalDeviceInfo->LogicalDeviceControl
-						      .LogicalDeviceInitialized
-				 ? "Completed" : "Failed"));
-	      memcpy(LogicalDeviceInfo, NewLogicalDeviceInfo,
-		     sizeof(DAC960_V2_LogicalDeviceInfo_T));
-	    }
-	  Controller->V2.LogicalDriveFoundDuringScan
-			 [LogicalDeviceNumber] = true;
-	  NewLogicalDeviceInfo->LogicalDeviceNumber++;
-	}
-      else if (IOCTLOpcode == DAC960_V2_GetLogicalDeviceInfoValid)
-	{
-	  int LogicalDriveNumber;
-	  for (LogicalDriveNumber = 0;
-	       LogicalDriveNumber < DAC960_MaxLogicalDrives;
-	       LogicalDriveNumber++)
-	    {
-	      DAC960_V2_LogicalDeviceInfo_T *LogicalDeviceInfo =
-		Controller->V2.LogicalDeviceInformation[LogicalDriveNumber];
-	      if (LogicalDeviceInfo == NULL ||
-		  Controller->V2.LogicalDriveFoundDuringScan
-				 [LogicalDriveNumber])
-		continue;
-	      DAC960_Critical("Logical Drive %d (/dev/rd/c%dd%d) "
-			      "No Longer Exists\n", Controller,
-			      LogicalDriveNumber,
-			      Controller->ControllerNumber,
-			      LogicalDriveNumber);
-	      Controller->V2.LogicalDeviceInformation
-			     [LogicalDriveNumber] = NULL;
-	      kfree(LogicalDeviceInfo);
-	      Controller->LogicalDriveInitiallyAccessible
-			  [LogicalDriveNumber] = false;
-	      DAC960_ComputeGenericDiskInfo(Controller);
-	    }
-	  Controller->V2.NeedLogicalDeviceInformation = false;
-	}
-      else if (CommandOpcode == DAC960_V2_SCSI_10_Passthru)
-        {
-	    DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
-		Controller->V2.InquiryUnitSerialNumber[Controller->V2.PhysicalDeviceIndex - 1];
-
-	    if (CommandStatus != DAC960_V2_NormalCompletion) {
-		memset(InquiryUnitSerialNumber,
-			0, sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
-		InquiryUnitSerialNumber->PeripheralDeviceType = 0x1F;
-	    } else
-	  	memcpy(InquiryUnitSerialNumber,
-			Controller->V2.NewInquiryUnitSerialNumber,
-			sizeof(DAC960_SCSI_Inquiry_UnitSerialNumber_T));
-
-	     Controller->V2.NeedDeviceSerialNumberInformation = false;
-        }
-
-      if (Controller->V2.HealthStatusBuffer->NextEventSequenceNumber
-	  - Controller->V2.NextEventSequenceNumber > 0)
-	{
-	  CommandMailbox->GetEvent.CommandOpcode = DAC960_V2_IOCTL;
-	  CommandMailbox->GetEvent.DataTransferSize = sizeof(DAC960_V2_Event_T);
-	  CommandMailbox->GetEvent.EventSequenceNumberHigh16 =
-	    Controller->V2.NextEventSequenceNumber >> 16;
-	  CommandMailbox->GetEvent.ControllerNumber = 0;
-	  CommandMailbox->GetEvent.IOCTL_Opcode =
-	    DAC960_V2_GetEvent;
-	  CommandMailbox->GetEvent.EventSequenceNumberLow16 =
-	    Controller->V2.NextEventSequenceNumber & 0xFFFF;
-	  CommandMailbox->GetEvent.DataTransferMemoryAddress
-				  .ScatterGatherSegments[0]
-				  .SegmentDataPointer =
-	    Controller->V2.EventDMA;
-	  CommandMailbox->GetEvent.DataTransferMemoryAddress
-				  .ScatterGatherSegments[0]
-				  .SegmentByteCount =
-	    CommandMailbox->GetEvent.DataTransferSize;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      if (Controller->V2.NeedPhysicalDeviceInformation)
-	{
-	  if (Controller->V2.NeedDeviceSerialNumberInformation)
-	    {
-	      DAC960_SCSI_Inquiry_UnitSerialNumber_T *InquiryUnitSerialNumber =
-                Controller->V2.NewInquiryUnitSerialNumber;
-	      InquiryUnitSerialNumber->PeripheralDeviceType = 0x1F;
-
-	      DAC960_V2_ConstructNewUnitSerialNumber(Controller, CommandMailbox,
-			Controller->V2.NewPhysicalDeviceInformation->Channel,
-			Controller->V2.NewPhysicalDeviceInformation->TargetID,
-		Controller->V2.NewPhysicalDeviceInformation->LogicalUnit - 1);
-
-
-	      DAC960_QueueCommand(Command);
-	      return;
-	    }
-	  if (Controller->V2.StartPhysicalDeviceInformationScan)
-	    {
-	      Controller->V2.PhysicalDeviceIndex = 0;
-	      Controller->V2.NewPhysicalDeviceInformation->Channel = 0;
-	      Controller->V2.NewPhysicalDeviceInformation->TargetID = 0;
-	      Controller->V2.NewPhysicalDeviceInformation->LogicalUnit = 0;
-	      Controller->V2.StartPhysicalDeviceInformationScan = false;
-	    }
-	  CommandMailbox->PhysicalDeviceInfo.CommandOpcode = DAC960_V2_IOCTL;
-	  CommandMailbox->PhysicalDeviceInfo.DataTransferSize =
-	    sizeof(DAC960_V2_PhysicalDeviceInfo_T);
-	  CommandMailbox->PhysicalDeviceInfo.PhysicalDevice.LogicalUnit =
-	    Controller->V2.NewPhysicalDeviceInformation->LogicalUnit;
-	  CommandMailbox->PhysicalDeviceInfo.PhysicalDevice.TargetID =
-	    Controller->V2.NewPhysicalDeviceInformation->TargetID;
-	  CommandMailbox->PhysicalDeviceInfo.PhysicalDevice.Channel =
-	    Controller->V2.NewPhysicalDeviceInformation->Channel;
-	  CommandMailbox->PhysicalDeviceInfo.IOCTL_Opcode =
-	    DAC960_V2_GetPhysicalDeviceInfoValid;
-	  CommandMailbox->PhysicalDeviceInfo.DataTransferMemoryAddress
-					    .ScatterGatherSegments[0]
-					    .SegmentDataPointer =
-	    Controller->V2.NewPhysicalDeviceInformationDMA;
-	  CommandMailbox->PhysicalDeviceInfo.DataTransferMemoryAddress
-					    .ScatterGatherSegments[0]
-					    .SegmentByteCount =
-	    CommandMailbox->PhysicalDeviceInfo.DataTransferSize;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      if (Controller->V2.NeedLogicalDeviceInformation)
-	{
-	  if (Controller->V2.StartLogicalDeviceInformationScan)
-	    {
-	      int LogicalDriveNumber;
-	      for (LogicalDriveNumber = 0;
-		   LogicalDriveNumber < DAC960_MaxLogicalDrives;
-		   LogicalDriveNumber++)
-		Controller->V2.LogicalDriveFoundDuringScan
-			       [LogicalDriveNumber] = false;
-	      Controller->V2.NewLogicalDeviceInformation->LogicalDeviceNumber = 0;
-	      Controller->V2.StartLogicalDeviceInformationScan = false;
-	    }
-	  CommandMailbox->LogicalDeviceInfo.CommandOpcode = DAC960_V2_IOCTL;
-	  CommandMailbox->LogicalDeviceInfo.DataTransferSize =
-	    sizeof(DAC960_V2_LogicalDeviceInfo_T);
-	  CommandMailbox->LogicalDeviceInfo.LogicalDevice.LogicalDeviceNumber =
-	    Controller->V2.NewLogicalDeviceInformation->LogicalDeviceNumber;
-	  CommandMailbox->LogicalDeviceInfo.IOCTL_Opcode =
-	    DAC960_V2_GetLogicalDeviceInfoValid;
-	  CommandMailbox->LogicalDeviceInfo.DataTransferMemoryAddress
-					   .ScatterGatherSegments[0]
-					   .SegmentDataPointer =
-	    Controller->V2.NewLogicalDeviceInformationDMA;
-	  CommandMailbox->LogicalDeviceInfo.DataTransferMemoryAddress
-					   .ScatterGatherSegments[0]
-					   .SegmentByteCount =
-	    CommandMailbox->LogicalDeviceInfo.DataTransferSize;
-	  DAC960_QueueCommand(Command);
-	  return;
-	}
-      Controller->MonitoringTimerCount++;
-      Controller->MonitoringTimer.expires =
-	jiffies + DAC960_HealthStatusMonitoringInterval;
-      	add_timer(&Controller->MonitoringTimer);
-    }
-  if (CommandType == DAC960_ImmediateCommand)
-    {
-      complete(Command->Completion);
-      Command->Completion = NULL;
-      return;
-    }
-  if (CommandType == DAC960_QueuedCommand)
-    {
-      DAC960_V2_KernelCommand_T *KernelCommand = Command->V2.KernelCommand;
-      KernelCommand->CommandStatus = CommandStatus;
-      KernelCommand->RequestSenseLength = Command->V2.RequestSenseLength;
-      KernelCommand->DataTransferLength = Command->V2.DataTransferResidue;
-      Command->V2.KernelCommand = NULL;
-      DAC960_DeallocateCommand(Command);
-      KernelCommand->CompletionFunction(KernelCommand);
-      return;
-    }
-  /*
-    Queue a Status Monitoring Command to the Controller using the just
-    completed Command if one was deferred previously due to lack of a
-    free Command when the Monitoring Timer Function was called.
-  */
-  if (Controller->MonitoringCommandDeferred)
-    {
-      Controller->MonitoringCommandDeferred = false;
-      DAC960_V2_QueueMonitoringCommand(Command);
-      return;
-    }
-  /*
-    Deallocate the Command.
-  */
-  DAC960_DeallocateCommand(Command);
-  /*
-    Wake up any processes waiting on a free Command.
-  */
-  wake_up(&Controller->CommandWaitQueue);
-}
-
-/*
-  DAC960_GEM_InterruptHandler handles hardware interrupts from DAC960 GEM Series
-  Controllers.
-*/
-
-static irqreturn_t DAC960_GEM_InterruptHandler(int IRQ_Channel,
-				       void *DeviceIdentifier)
-{
-  DAC960_Controller_T *Controller = DeviceIdentifier;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V2_StatusMailbox_T *NextStatusMailbox;
-  unsigned long flags;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  DAC960_GEM_AcknowledgeInterrupt(ControllerBaseAddress);
-  NextStatusMailbox = Controller->V2.NextStatusMailbox;
-  while (NextStatusMailbox->Fields.CommandIdentifier > 0)
-    {
-       DAC960_V2_CommandIdentifier_T CommandIdentifier =
-           NextStatusMailbox->Fields.CommandIdentifier;
-       DAC960_Command_T *Command = Controller->Commands[CommandIdentifier-1];
-       Command->V2.CommandStatus = NextStatusMailbox->Fields.CommandStatus;
-       Command->V2.RequestSenseLength =
-           NextStatusMailbox->Fields.RequestSenseLength;
-       Command->V2.DataTransferResidue =
-           NextStatusMailbox->Fields.DataTransferResidue;
-       NextStatusMailbox->Words[0] = 0;
-       if (++NextStatusMailbox > Controller->V2.LastStatusMailbox)
-           NextStatusMailbox = Controller->V2.FirstStatusMailbox;
-       DAC960_V2_ProcessCompletedCommand(Command);
-    }
-  Controller->V2.NextStatusMailbox = NextStatusMailbox;
-  /*
-    Attempt to remove additional I/O Requests from the Controller's
-    I/O Request Queue and queue them to the Controller.
-  */
-  DAC960_ProcessRequest(Controller);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  return IRQ_HANDLED;
-}
-
-/*
-  DAC960_BA_InterruptHandler handles hardware interrupts from DAC960 BA Series
-  Controllers.
-*/
-
-static irqreturn_t DAC960_BA_InterruptHandler(int IRQ_Channel,
-				       void *DeviceIdentifier)
-{
-  DAC960_Controller_T *Controller = DeviceIdentifier;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V2_StatusMailbox_T *NextStatusMailbox;
-  unsigned long flags;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  DAC960_BA_AcknowledgeInterrupt(ControllerBaseAddress);
-  NextStatusMailbox = Controller->V2.NextStatusMailbox;
-  while (NextStatusMailbox->Fields.CommandIdentifier > 0)
-    {
-      DAC960_V2_CommandIdentifier_T CommandIdentifier =
-	NextStatusMailbox->Fields.CommandIdentifier;
-      DAC960_Command_T *Command = Controller->Commands[CommandIdentifier-1];
-      Command->V2.CommandStatus = NextStatusMailbox->Fields.CommandStatus;
-      Command->V2.RequestSenseLength =
-	NextStatusMailbox->Fields.RequestSenseLength;
-      Command->V2.DataTransferResidue =
-	NextStatusMailbox->Fields.DataTransferResidue;
-      NextStatusMailbox->Words[0] = 0;
-      if (++NextStatusMailbox > Controller->V2.LastStatusMailbox)
-	NextStatusMailbox = Controller->V2.FirstStatusMailbox;
-      DAC960_V2_ProcessCompletedCommand(Command);
-    }
-  Controller->V2.NextStatusMailbox = NextStatusMailbox;
-  /*
-    Attempt to remove additional I/O Requests from the Controller's
-    I/O Request Queue and queue them to the Controller.
-  */
-  DAC960_ProcessRequest(Controller);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  return IRQ_HANDLED;
-}
-
-
-/*
-  DAC960_LP_InterruptHandler handles hardware interrupts from DAC960 LP Series
-  Controllers.
-*/
-
-static irqreturn_t DAC960_LP_InterruptHandler(int IRQ_Channel,
-				       void *DeviceIdentifier)
-{
-  DAC960_Controller_T *Controller = DeviceIdentifier;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V2_StatusMailbox_T *NextStatusMailbox;
-  unsigned long flags;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  DAC960_LP_AcknowledgeInterrupt(ControllerBaseAddress);
-  NextStatusMailbox = Controller->V2.NextStatusMailbox;
-  while (NextStatusMailbox->Fields.CommandIdentifier > 0)
-    {
-      DAC960_V2_CommandIdentifier_T CommandIdentifier =
-	NextStatusMailbox->Fields.CommandIdentifier;
-      DAC960_Command_T *Command = Controller->Commands[CommandIdentifier-1];
-      Command->V2.CommandStatus = NextStatusMailbox->Fields.CommandStatus;
-      Command->V2.RequestSenseLength =
-	NextStatusMailbox->Fields.RequestSenseLength;
-      Command->V2.DataTransferResidue =
-	NextStatusMailbox->Fields.DataTransferResidue;
-      NextStatusMailbox->Words[0] = 0;
-      if (++NextStatusMailbox > Controller->V2.LastStatusMailbox)
-	NextStatusMailbox = Controller->V2.FirstStatusMailbox;
-      DAC960_V2_ProcessCompletedCommand(Command);
-    }
-  Controller->V2.NextStatusMailbox = NextStatusMailbox;
-  /*
-    Attempt to remove additional I/O Requests from the Controller's
-    I/O Request Queue and queue them to the Controller.
-  */
-  DAC960_ProcessRequest(Controller);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  return IRQ_HANDLED;
-}
-
-
-/*
-  DAC960_LA_InterruptHandler handles hardware interrupts from DAC960 LA Series
-  Controllers.
-*/
-
-static irqreturn_t DAC960_LA_InterruptHandler(int IRQ_Channel,
-				       void *DeviceIdentifier)
-{
-  DAC960_Controller_T *Controller = DeviceIdentifier;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V1_StatusMailbox_T *NextStatusMailbox;
-  unsigned long flags;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  DAC960_LA_AcknowledgeInterrupt(ControllerBaseAddress);
-  NextStatusMailbox = Controller->V1.NextStatusMailbox;
-  while (NextStatusMailbox->Fields.Valid)
-    {
-      DAC960_V1_CommandIdentifier_T CommandIdentifier =
-	NextStatusMailbox->Fields.CommandIdentifier;
-      DAC960_Command_T *Command = Controller->Commands[CommandIdentifier-1];
-      Command->V1.CommandStatus = NextStatusMailbox->Fields.CommandStatus;
-      NextStatusMailbox->Word = 0;
-      if (++NextStatusMailbox > Controller->V1.LastStatusMailbox)
-	NextStatusMailbox = Controller->V1.FirstStatusMailbox;
-      DAC960_V1_ProcessCompletedCommand(Command);
-    }
-  Controller->V1.NextStatusMailbox = NextStatusMailbox;
-  /*
-    Attempt to remove additional I/O Requests from the Controller's
-    I/O Request Queue and queue them to the Controller.
-  */
-  DAC960_ProcessRequest(Controller);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  return IRQ_HANDLED;
-}
-
-
-/*
-  DAC960_PG_InterruptHandler handles hardware interrupts from DAC960 PG Series
-  Controllers.
-*/
-
-static irqreturn_t DAC960_PG_InterruptHandler(int IRQ_Channel,
-				       void *DeviceIdentifier)
-{
-  DAC960_Controller_T *Controller = DeviceIdentifier;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  DAC960_V1_StatusMailbox_T *NextStatusMailbox;
-  unsigned long flags;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  DAC960_PG_AcknowledgeInterrupt(ControllerBaseAddress);
-  NextStatusMailbox = Controller->V1.NextStatusMailbox;
-  while (NextStatusMailbox->Fields.Valid)
-    {
-      DAC960_V1_CommandIdentifier_T CommandIdentifier =
-	NextStatusMailbox->Fields.CommandIdentifier;
-      DAC960_Command_T *Command = Controller->Commands[CommandIdentifier-1];
-      Command->V1.CommandStatus = NextStatusMailbox->Fields.CommandStatus;
-      NextStatusMailbox->Word = 0;
-      if (++NextStatusMailbox > Controller->V1.LastStatusMailbox)
-	NextStatusMailbox = Controller->V1.FirstStatusMailbox;
-      DAC960_V1_ProcessCompletedCommand(Command);
-    }
-  Controller->V1.NextStatusMailbox = NextStatusMailbox;
-  /*
-    Attempt to remove additional I/O Requests from the Controller's
-    I/O Request Queue and queue them to the Controller.
-  */
-  DAC960_ProcessRequest(Controller);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  return IRQ_HANDLED;
-}
-
-
-/*
-  DAC960_PD_InterruptHandler handles hardware interrupts from DAC960 PD Series
-  Controllers.
-*/
-
-static irqreturn_t DAC960_PD_InterruptHandler(int IRQ_Channel,
-				       void *DeviceIdentifier)
-{
-  DAC960_Controller_T *Controller = DeviceIdentifier;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  unsigned long flags;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  while (DAC960_PD_StatusAvailableP(ControllerBaseAddress))
-    {
-      DAC960_V1_CommandIdentifier_T CommandIdentifier =
-	DAC960_PD_ReadStatusCommandIdentifier(ControllerBaseAddress);
-      DAC960_Command_T *Command = Controller->Commands[CommandIdentifier-1];
-      Command->V1.CommandStatus =
-	DAC960_PD_ReadStatusRegister(ControllerBaseAddress);
-      DAC960_PD_AcknowledgeInterrupt(ControllerBaseAddress);
-      DAC960_PD_AcknowledgeStatus(ControllerBaseAddress);
-      DAC960_V1_ProcessCompletedCommand(Command);
-    }
-  /*
-    Attempt to remove additional I/O Requests from the Controller's
-    I/O Request Queue and queue them to the Controller.
-  */
-  DAC960_ProcessRequest(Controller);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  return IRQ_HANDLED;
-}
-
-
-/*
-  DAC960_P_InterruptHandler handles hardware interrupts from DAC960 P Series
-  Controllers.
-
-  Translations of DAC960_V1_Enquiry and DAC960_V1_GetDeviceState rely
-  on the data having been placed into DAC960_Controller_T, rather than
-  an arbitrary buffer.
-*/
-
-static irqreturn_t DAC960_P_InterruptHandler(int IRQ_Channel,
-				      void *DeviceIdentifier)
-{
-  DAC960_Controller_T *Controller = DeviceIdentifier;
-  void __iomem *ControllerBaseAddress = Controller->BaseAddress;
-  unsigned long flags;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  while (DAC960_PD_StatusAvailableP(ControllerBaseAddress))
-    {
-      DAC960_V1_CommandIdentifier_T CommandIdentifier =
-	DAC960_PD_ReadStatusCommandIdentifier(ControllerBaseAddress);
-      DAC960_Command_T *Command = Controller->Commands[CommandIdentifier-1];
-      DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-      DAC960_V1_CommandOpcode_T CommandOpcode =
-	CommandMailbox->Common.CommandOpcode;
-      Command->V1.CommandStatus =
-	DAC960_PD_ReadStatusRegister(ControllerBaseAddress);
-      DAC960_PD_AcknowledgeInterrupt(ControllerBaseAddress);
-      DAC960_PD_AcknowledgeStatus(ControllerBaseAddress);
-      switch (CommandOpcode)
-	{
-	case DAC960_V1_Enquiry_Old:
-	  Command->V1.CommandMailbox.Common.CommandOpcode = DAC960_V1_Enquiry;
-	  DAC960_P_To_PD_TranslateEnquiry(Controller->V1.NewEnquiry);
-	  break;
-	case DAC960_V1_GetDeviceState_Old:
-	  Command->V1.CommandMailbox.Common.CommandOpcode =
-	    					DAC960_V1_GetDeviceState;
-	  DAC960_P_To_PD_TranslateDeviceState(Controller->V1.NewDeviceState);
-	  break;
-	case DAC960_V1_Read_Old:
-	  Command->V1.CommandMailbox.Common.CommandOpcode = DAC960_V1_Read;
-	  DAC960_P_To_PD_TranslateReadWriteCommand(CommandMailbox);
-	  break;
-	case DAC960_V1_Write_Old:
-	  Command->V1.CommandMailbox.Common.CommandOpcode = DAC960_V1_Write;
-	  DAC960_P_To_PD_TranslateReadWriteCommand(CommandMailbox);
-	  break;
-	case DAC960_V1_ReadWithScatterGather_Old:
-	  Command->V1.CommandMailbox.Common.CommandOpcode =
-	    DAC960_V1_ReadWithScatterGather;
-	  DAC960_P_To_PD_TranslateReadWriteCommand(CommandMailbox);
-	  break;
-	case DAC960_V1_WriteWithScatterGather_Old:
-	  Command->V1.CommandMailbox.Common.CommandOpcode =
-	    DAC960_V1_WriteWithScatterGather;
-	  DAC960_P_To_PD_TranslateReadWriteCommand(CommandMailbox);
-	  break;
-	default:
-	  break;
-	}
-      DAC960_V1_ProcessCompletedCommand(Command);
-    }
-  /*
-    Attempt to remove additional I/O Requests from the Controller's
-    I/O Request Queue and queue them to the Controller.
-  */
-  DAC960_ProcessRequest(Controller);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  return IRQ_HANDLED;
-}
-
-
-/*
-  DAC960_V1_QueueMonitoringCommand queues a Monitoring Command to DAC960 V1
-  Firmware Controllers.
-*/
-
-static void DAC960_V1_QueueMonitoringCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  DAC960_V1_ClearCommand(Command);
-  Command->CommandType = DAC960_MonitoringCommand;
-  CommandMailbox->Type3.CommandOpcode = DAC960_V1_Enquiry;
-  CommandMailbox->Type3.BusAddress = Controller->V1.NewEnquiryDMA;
-  DAC960_QueueCommand(Command);
-}
-
-
-/*
-  DAC960_V2_QueueMonitoringCommand queues a Monitoring Command to DAC960 V2
-  Firmware Controllers.
-*/
-
-static void DAC960_V2_QueueMonitoringCommand(DAC960_Command_T *Command)
-{
-  DAC960_Controller_T *Controller = Command->Controller;
-  DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
-  DAC960_V2_ClearCommand(Command);
-  Command->CommandType = DAC960_MonitoringCommand;
-  CommandMailbox->ControllerInfo.CommandOpcode = DAC960_V2_IOCTL;
-  CommandMailbox->ControllerInfo.CommandControlBits
-				.DataTransferControllerToHost = true;
-  CommandMailbox->ControllerInfo.CommandControlBits
-				.NoAutoRequestSense = true;
-  CommandMailbox->ControllerInfo.DataTransferSize =
-    sizeof(DAC960_V2_ControllerInfo_T);
-  CommandMailbox->ControllerInfo.ControllerNumber = 0;
-  CommandMailbox->ControllerInfo.IOCTL_Opcode = DAC960_V2_GetControllerInfo;
-  CommandMailbox->ControllerInfo.DataTransferMemoryAddress
-				.ScatterGatherSegments[0]
-				.SegmentDataPointer =
-    Controller->V2.NewControllerInformationDMA;
-  CommandMailbox->ControllerInfo.DataTransferMemoryAddress
-				.ScatterGatherSegments[0]
-				.SegmentByteCount =
-    CommandMailbox->ControllerInfo.DataTransferSize;
-  DAC960_QueueCommand(Command);
-}
-
-
-/*
-  DAC960_MonitoringTimerFunction is the timer function for monitoring
-  the status of DAC960 Controllers.
-*/
-
-static void DAC960_MonitoringTimerFunction(struct timer_list *t)
-{
-  DAC960_Controller_T *Controller = from_timer(Controller, t, MonitoringTimer);
-  DAC960_Command_T *Command;
-  unsigned long flags;
-
-  if (Controller->FirmwareType == DAC960_V1_Controller)
-    {
-      spin_lock_irqsave(&Controller->queue_lock, flags);
-      /*
-	Queue a Status Monitoring Command to Controller.
-      */
-      Command = DAC960_AllocateCommand(Controller);
-      if (Command != NULL)
-	DAC960_V1_QueueMonitoringCommand(Command);
-      else Controller->MonitoringCommandDeferred = true;
-      spin_unlock_irqrestore(&Controller->queue_lock, flags);
-    }
-  else
-    {
-      DAC960_V2_ControllerInfo_T *ControllerInfo =
-	&Controller->V2.ControllerInformation;
-      unsigned int StatusChangeCounter =
-	Controller->V2.HealthStatusBuffer->StatusChangeCounter;
-      bool ForceMonitoringCommand = false;
-      if (time_after(jiffies, Controller->SecondaryMonitoringTime
-	  + DAC960_SecondaryMonitoringInterval))
-	{
-	  int LogicalDriveNumber;
-	  for (LogicalDriveNumber = 0;
-	       LogicalDriveNumber < DAC960_MaxLogicalDrives;
-	       LogicalDriveNumber++)
-	    {
-	      DAC960_V2_LogicalDeviceInfo_T *LogicalDeviceInfo =
-		Controller->V2.LogicalDeviceInformation[LogicalDriveNumber];
-	      if (LogicalDeviceInfo == NULL) continue;
-	      if (!LogicalDeviceInfo->LogicalDeviceControl
-				     .LogicalDeviceInitialized)
-		{
-		  ForceMonitoringCommand = true;
-		  break;
-		}
-	    }
-	  Controller->SecondaryMonitoringTime = jiffies;
-	}
-      if (StatusChangeCounter == Controller->V2.StatusChangeCounter &&
-	  Controller->V2.HealthStatusBuffer->NextEventSequenceNumber
-	  == Controller->V2.NextEventSequenceNumber &&
-	  (ControllerInfo->BackgroundInitializationsActive +
-	   ControllerInfo->LogicalDeviceInitializationsActive +
-	   ControllerInfo->PhysicalDeviceInitializationsActive +
-	   ControllerInfo->ConsistencyChecksActive +
-	   ControllerInfo->RebuildsActive +
-	   ControllerInfo->OnlineExpansionsActive == 0 ||
-	   time_before(jiffies, Controller->PrimaryMonitoringTime
-	   + DAC960_MonitoringTimerInterval)) &&
-	  !ForceMonitoringCommand)
-	{
-	  Controller->MonitoringTimer.expires =
-	    jiffies + DAC960_HealthStatusMonitoringInterval;
-	    add_timer(&Controller->MonitoringTimer);
-	  return;
-	}
-      Controller->V2.StatusChangeCounter = StatusChangeCounter;
-      Controller->PrimaryMonitoringTime = jiffies;
-
-      spin_lock_irqsave(&Controller->queue_lock, flags);
-      /*
-	Queue a Status Monitoring Command to Controller.
-      */
-      Command = DAC960_AllocateCommand(Controller);
-      if (Command != NULL)
-	DAC960_V2_QueueMonitoringCommand(Command);
-      else Controller->MonitoringCommandDeferred = true;
-      spin_unlock_irqrestore(&Controller->queue_lock, flags);
-      /*
-	Wake up any processes waiting on a Health Status Buffer change.
-      */
-      wake_up(&Controller->HealthStatusWaitQueue);
-    }
-}
-
-/*
-  DAC960_CheckStatusBuffer verifies that there is room to hold ByteCount
-  additional bytes in the Combined Status Buffer and grows the buffer if
-  necessary.  It returns true if there is enough room and false otherwise.
-*/
-
-static bool DAC960_CheckStatusBuffer(DAC960_Controller_T *Controller,
-					unsigned int ByteCount)
-{
-  unsigned char *NewStatusBuffer;
-  if (Controller->InitialStatusLength + 1 +
-      Controller->CurrentStatusLength + ByteCount + 1 <=
-      Controller->CombinedStatusBufferLength)
-    return true;
-  if (Controller->CombinedStatusBufferLength == 0)
-    {
-      unsigned int NewStatusBufferLength = DAC960_InitialStatusBufferSize;
-      while (NewStatusBufferLength < ByteCount)
-	NewStatusBufferLength *= 2;
-      Controller->CombinedStatusBuffer = kmalloc(NewStatusBufferLength,
-						  GFP_ATOMIC);
-      if (Controller->CombinedStatusBuffer == NULL) return false;
-      Controller->CombinedStatusBufferLength = NewStatusBufferLength;
-      return true;
-    }
-  NewStatusBuffer = kmalloc_array(2, Controller->CombinedStatusBufferLength,
-                                  GFP_ATOMIC);
-  if (NewStatusBuffer == NULL)
-    {
-      DAC960_Warning("Unable to expand Combined Status Buffer - Truncating\n",
-		     Controller);
-      return false;
-    }
-  memcpy(NewStatusBuffer, Controller->CombinedStatusBuffer,
-	 Controller->CombinedStatusBufferLength);
-  kfree(Controller->CombinedStatusBuffer);
-  Controller->CombinedStatusBuffer = NewStatusBuffer;
-  Controller->CombinedStatusBufferLength *= 2;
-  Controller->CurrentStatusBuffer =
-    &NewStatusBuffer[Controller->InitialStatusLength + 1];
-  return true;
-}
-
-
-/*
-  DAC960_Message prints Driver Messages.
-*/
-
-static void DAC960_Message(DAC960_MessageLevel_T MessageLevel,
-			   unsigned char *Format,
-			   DAC960_Controller_T *Controller,
-			   ...)
-{
-  static unsigned char Buffer[DAC960_LineBufferSize];
-  static bool BeginningOfLine = true;
-  va_list Arguments;
-  int Length = 0;
-  va_start(Arguments, Controller);
-  Length = vsprintf(Buffer, Format, Arguments);
-  va_end(Arguments);
-  if (Controller == NULL)
-    printk("%sDAC960#%d: %s", DAC960_MessageLevelMap[MessageLevel],
-	   DAC960_ControllerCount, Buffer);
-  else if (MessageLevel == DAC960_AnnounceLevel ||
-	   MessageLevel == DAC960_InfoLevel)
-    {
-      if (!Controller->ControllerInitialized)
-	{
-	  if (DAC960_CheckStatusBuffer(Controller, Length))
-	    {
-	      strcpy(&Controller->CombinedStatusBuffer
-				  [Controller->InitialStatusLength],
-		     Buffer);
-	      Controller->InitialStatusLength += Length;
-	      Controller->CurrentStatusBuffer =
-		&Controller->CombinedStatusBuffer
-			     [Controller->InitialStatusLength + 1];
-	    }
-	  if (MessageLevel == DAC960_AnnounceLevel)
-	    {
-	      static int AnnouncementLines = 0;
-	      if (++AnnouncementLines <= 2)
-		printk("%sDAC960: %s", DAC960_MessageLevelMap[MessageLevel],
-		       Buffer);
-	    }
-	  else
-	    {
-	      if (BeginningOfLine)
-		{
-		  if (Buffer[0] != '\n' || Length > 1)
-		    printk("%sDAC960#%d: %s",
-			   DAC960_MessageLevelMap[MessageLevel],
-			   Controller->ControllerNumber, Buffer);
-		}
-	      else printk("%s", Buffer);
-	    }
-	}
-      else if (DAC960_CheckStatusBuffer(Controller, Length))
-	{
-	  strcpy(&Controller->CurrentStatusBuffer[
-		    Controller->CurrentStatusLength], Buffer);
-	  Controller->CurrentStatusLength += Length;
-	}
-    }
-  else if (MessageLevel == DAC960_ProgressLevel)
-    {
-      strcpy(Controller->ProgressBuffer, Buffer);
-      Controller->ProgressBufferLength = Length;
-      if (Controller->EphemeralProgressMessage)
-	{
-	  if (time_after_eq(jiffies, Controller->LastProgressReportTime
-	      + DAC960_ProgressReportingInterval))
-	    {
-	      printk("%sDAC960#%d: %s", DAC960_MessageLevelMap[MessageLevel],
-		     Controller->ControllerNumber, Buffer);
-	      Controller->LastProgressReportTime = jiffies;
-	    }
-	}
-      else printk("%sDAC960#%d: %s", DAC960_MessageLevelMap[MessageLevel],
-		  Controller->ControllerNumber, Buffer);
-    }
-  else if (MessageLevel == DAC960_UserCriticalLevel)
-    {
-      strcpy(&Controller->UserStatusBuffer[Controller->UserStatusLength],
-	     Buffer);
-      Controller->UserStatusLength += Length;
-      if (Buffer[0] != '\n' || Length > 1)
-	printk("%sDAC960#%d: %s", DAC960_MessageLevelMap[MessageLevel],
-	       Controller->ControllerNumber, Buffer);
-    }
-  else
-    {
-      if (BeginningOfLine)
-	printk("%sDAC960#%d: %s", DAC960_MessageLevelMap[MessageLevel],
-	       Controller->ControllerNumber, Buffer);
-      else printk("%s", Buffer);
-    }
-  BeginningOfLine = (Buffer[Length-1] == '\n');
-}
-
-
-/*
-  DAC960_ParsePhysicalDevice parses spaces followed by a Physical Device
-  Channel:TargetID specification from a User Command string.  It updates
-  Channel and TargetID and returns true on success and false on failure.
-*/
-
-static bool DAC960_ParsePhysicalDevice(DAC960_Controller_T *Controller,
-					  char *UserCommandString,
-					  unsigned char *Channel,
-					  unsigned char *TargetID)
-{
-  char *NewUserCommandString = UserCommandString;
-  unsigned long XChannel, XTargetID;
-  while (*UserCommandString == ' ') UserCommandString++;
-  if (UserCommandString == NewUserCommandString)
-    return false;
-  XChannel = simple_strtoul(UserCommandString, &NewUserCommandString, 10);
-  if (NewUserCommandString == UserCommandString ||
-      *NewUserCommandString != ':' ||
-      XChannel >= Controller->Channels)
-    return false;
-  UserCommandString = ++NewUserCommandString;
-  XTargetID = simple_strtoul(UserCommandString, &NewUserCommandString, 10);
-  if (NewUserCommandString == UserCommandString ||
-      *NewUserCommandString != '\0' ||
-      XTargetID >= Controller->Targets)
-    return false;
-  *Channel = XChannel;
-  *TargetID = XTargetID;
-  return true;
-}
-
-
-/*
-  DAC960_ParseLogicalDrive parses spaces followed by a Logical Drive Number
-  specification from a User Command string.  It updates LogicalDriveNumber and
-  returns true on success and false on failure.
-*/
-
-static bool DAC960_ParseLogicalDrive(DAC960_Controller_T *Controller,
-					char *UserCommandString,
-					unsigned char *LogicalDriveNumber)
-{
-  char *NewUserCommandString = UserCommandString;
-  unsigned long XLogicalDriveNumber;
-  while (*UserCommandString == ' ') UserCommandString++;
-  if (UserCommandString == NewUserCommandString)
-    return false;
-  XLogicalDriveNumber =
-    simple_strtoul(UserCommandString, &NewUserCommandString, 10);
-  if (NewUserCommandString == UserCommandString ||
-      *NewUserCommandString != '\0' ||
-      XLogicalDriveNumber > DAC960_MaxLogicalDrives - 1)
-    return false;
-  *LogicalDriveNumber = XLogicalDriveNumber;
-  return true;
-}
-
-
-/*
-  DAC960_V1_SetDeviceState sets the Device State for a Physical Device for
-  DAC960 V1 Firmware Controllers.
-*/
-
-static void DAC960_V1_SetDeviceState(DAC960_Controller_T *Controller,
-				     DAC960_Command_T *Command,
-				     unsigned char Channel,
-				     unsigned char TargetID,
-				     DAC960_V1_PhysicalDeviceState_T
-				       DeviceState,
-				     const unsigned char *DeviceStateString)
-{
-  DAC960_V1_CommandMailbox_T *CommandMailbox = &Command->V1.CommandMailbox;
-  CommandMailbox->Type3D.CommandOpcode = DAC960_V1_StartDevice;
-  CommandMailbox->Type3D.Channel = Channel;
-  CommandMailbox->Type3D.TargetID = TargetID;
-  CommandMailbox->Type3D.DeviceState = DeviceState;
-  CommandMailbox->Type3D.Modifier = 0;
-  DAC960_ExecuteCommand(Command);
-  switch (Command->V1.CommandStatus)
-    {
-    case DAC960_V1_NormalCompletion:
-      DAC960_UserCritical("%s of Physical Device %d:%d Succeeded\n", Controller,
-			  DeviceStateString, Channel, TargetID);
-      break;
-    case DAC960_V1_UnableToStartDevice:
-      DAC960_UserCritical("%s of Physical Device %d:%d Failed - "
-			  "Unable to Start Device\n", Controller,
-			  DeviceStateString, Channel, TargetID);
-      break;
-    case DAC960_V1_NoDeviceAtAddress:
-      DAC960_UserCritical("%s of Physical Device %d:%d Failed - "
-			  "No Device at Address\n", Controller,
-			  DeviceStateString, Channel, TargetID);
-      break;
-    case DAC960_V1_InvalidChannelOrTargetOrModifier:
-      DAC960_UserCritical("%s of Physical Device %d:%d Failed - "
-			  "Invalid Channel or Target or Modifier\n",
-			  Controller, DeviceStateString, Channel, TargetID);
-      break;
-    case DAC960_V1_ChannelBusy:
-      DAC960_UserCritical("%s of Physical Device %d:%d Failed - "
-			  "Channel Busy\n", Controller,
-			  DeviceStateString, Channel, TargetID);
-      break;
-    default:
-      DAC960_UserCritical("%s of Physical Device %d:%d Failed - "
-			  "Unexpected Status %04X\n", Controller,
-			  DeviceStateString, Channel, TargetID,
-			  Command->V1.CommandStatus);
-      break;
-    }
-}
-
-
-/*
-  DAC960_V1_ExecuteUserCommand executes a User Command for DAC960 V1 Firmware
-  Controllers.
-*/
-
-static bool DAC960_V1_ExecuteUserCommand(DAC960_Controller_T *Controller,
-					    unsigned char *UserCommand)
-{
-  DAC960_Command_T *Command;
-  DAC960_V1_CommandMailbox_T *CommandMailbox;
-  unsigned long flags;
-  unsigned char Channel, TargetID, LogicalDriveNumber;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  while ((Command = DAC960_AllocateCommand(Controller)) == NULL)
-    DAC960_WaitForCommand(Controller);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  Controller->UserStatusLength = 0;
-  DAC960_V1_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox = &Command->V1.CommandMailbox;
-  if (strcmp(UserCommand, "flush-cache") == 0)
-    {
-      CommandMailbox->Type3.CommandOpcode = DAC960_V1_Flush;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Cache Flush Completed\n", Controller);
-    }
-  else if (strncmp(UserCommand, "kill", 4) == 0 &&
-	   DAC960_ParsePhysicalDevice(Controller, &UserCommand[4],
-				      &Channel, &TargetID))
-    {
-      DAC960_V1_DeviceState_T *DeviceState =
-	&Controller->V1.DeviceState[Channel][TargetID];
-      if (DeviceState->Present &&
-	  DeviceState->DeviceType == DAC960_V1_DiskType &&
-	  DeviceState->DeviceState != DAC960_V1_Device_Dead)
-	DAC960_V1_SetDeviceState(Controller, Command, Channel, TargetID,
-				 DAC960_V1_Device_Dead, "Kill");
-      else DAC960_UserCritical("Kill of Physical Device %d:%d Illegal\n",
-			       Controller, Channel, TargetID);
-    }
-  else if (strncmp(UserCommand, "make-online", 11) == 0 &&
-	   DAC960_ParsePhysicalDevice(Controller, &UserCommand[11],
-				      &Channel, &TargetID))
-    {
-      DAC960_V1_DeviceState_T *DeviceState =
-	&Controller->V1.DeviceState[Channel][TargetID];
-      if (DeviceState->Present &&
-	  DeviceState->DeviceType == DAC960_V1_DiskType &&
-	  DeviceState->DeviceState == DAC960_V1_Device_Dead)
-	DAC960_V1_SetDeviceState(Controller, Command, Channel, TargetID,
-				 DAC960_V1_Device_Online, "Make Online");
-      else DAC960_UserCritical("Make Online of Physical Device %d:%d Illegal\n",
-			       Controller, Channel, TargetID);
-
-    }
-  else if (strncmp(UserCommand, "make-standby", 12) == 0 &&
-	   DAC960_ParsePhysicalDevice(Controller, &UserCommand[12],
-				      &Channel, &TargetID))
-    {
-      DAC960_V1_DeviceState_T *DeviceState =
-	&Controller->V1.DeviceState[Channel][TargetID];
-      if (DeviceState->Present &&
-	  DeviceState->DeviceType == DAC960_V1_DiskType &&
-	  DeviceState->DeviceState == DAC960_V1_Device_Dead)
-	DAC960_V1_SetDeviceState(Controller, Command, Channel, TargetID,
-				 DAC960_V1_Device_Standby, "Make Standby");
-      else DAC960_UserCritical("Make Standby of Physical "
-			       "Device %d:%d Illegal\n",
-			       Controller, Channel, TargetID);
-    }
-  else if (strncmp(UserCommand, "rebuild", 7) == 0 &&
-	   DAC960_ParsePhysicalDevice(Controller, &UserCommand[7],
-				      &Channel, &TargetID))
-    {
-      CommandMailbox->Type3D.CommandOpcode = DAC960_V1_RebuildAsync;
-      CommandMailbox->Type3D.Channel = Channel;
-      CommandMailbox->Type3D.TargetID = TargetID;
-      DAC960_ExecuteCommand(Command);
-      switch (Command->V1.CommandStatus)
-	{
-	case DAC960_V1_NormalCompletion:
-	  DAC960_UserCritical("Rebuild of Physical Device %d:%d Initiated\n",
-			      Controller, Channel, TargetID);
-	  break;
-	case DAC960_V1_AttemptToRebuildOnlineDrive:
-	  DAC960_UserCritical("Rebuild of Physical Device %d:%d Failed - "
-			      "Attempt to Rebuild Online or "
-			      "Unresponsive Drive\n",
-			      Controller, Channel, TargetID);
-	  break;
-	case DAC960_V1_NewDiskFailedDuringRebuild:
-	  DAC960_UserCritical("Rebuild of Physical Device %d:%d Failed - "
-			      "New Disk Failed During Rebuild\n",
-			      Controller, Channel, TargetID);
-	  break;
-	case DAC960_V1_InvalidDeviceAddress:
-	  DAC960_UserCritical("Rebuild of Physical Device %d:%d Failed - "
-			      "Invalid Device Address\n",
-			      Controller, Channel, TargetID);
-	  break;
-	case DAC960_V1_RebuildOrCheckAlreadyInProgress:
-	  DAC960_UserCritical("Rebuild of Physical Device %d:%d Failed - "
-			      "Rebuild or Consistency Check Already "
-			      "in Progress\n", Controller, Channel, TargetID);
-	  break;
-	default:
-	  DAC960_UserCritical("Rebuild of Physical Device %d:%d Failed - "
-			      "Unexpected Status %04X\n", Controller,
-			      Channel, TargetID, Command->V1.CommandStatus);
-	  break;
-	}
-    }
-  else if (strncmp(UserCommand, "check-consistency", 17) == 0 &&
-	   DAC960_ParseLogicalDrive(Controller, &UserCommand[17],
-				    &LogicalDriveNumber))
-    {
-      CommandMailbox->Type3C.CommandOpcode = DAC960_V1_CheckConsistencyAsync;
-      CommandMailbox->Type3C.LogicalDriveNumber = LogicalDriveNumber;
-      CommandMailbox->Type3C.AutoRestore = true;
-      DAC960_ExecuteCommand(Command);
-      switch (Command->V1.CommandStatus)
-	{
-	case DAC960_V1_NormalCompletion:
-	  DAC960_UserCritical("Consistency Check of Logical Drive %d "
-			      "(/dev/rd/c%dd%d) Initiated\n",
-			      Controller, LogicalDriveNumber,
-			      Controller->ControllerNumber,
-			      LogicalDriveNumber);
-	  break;
-	case DAC960_V1_DependentDiskIsDead:
-	  DAC960_UserCritical("Consistency Check of Logical Drive %d "
-			      "(/dev/rd/c%dd%d) Failed - "
-			      "Dependent Physical Device is DEAD\n",
-			      Controller, LogicalDriveNumber,
-			      Controller->ControllerNumber,
-			      LogicalDriveNumber);
-	  break;
-	case DAC960_V1_InvalidOrNonredundantLogicalDrive:
-	  DAC960_UserCritical("Consistency Check of Logical Drive %d "
-			      "(/dev/rd/c%dd%d) Failed - "
-			      "Invalid or Nonredundant Logical Drive\n",
-			      Controller, LogicalDriveNumber,
-			      Controller->ControllerNumber,
-			      LogicalDriveNumber);
-	  break;
-	case DAC960_V1_RebuildOrCheckAlreadyInProgress:
-	  DAC960_UserCritical("Consistency Check of Logical Drive %d "
-			      "(/dev/rd/c%dd%d) Failed - Rebuild or "
-			      "Consistency Check Already in Progress\n",
-			      Controller, LogicalDriveNumber,
-			      Controller->ControllerNumber,
-			      LogicalDriveNumber);
-	  break;
-	default:
-	  DAC960_UserCritical("Consistency Check of Logical Drive %d "
-			      "(/dev/rd/c%dd%d) Failed - "
-			      "Unexpected Status %04X\n",
-			      Controller, LogicalDriveNumber,
-			      Controller->ControllerNumber,
-			      LogicalDriveNumber, Command->V1.CommandStatus);
-	  break;
-	}
-    }
-  else if (strcmp(UserCommand, "cancel-rebuild") == 0 ||
-	   strcmp(UserCommand, "cancel-consistency-check") == 0)
-    {
-      /*
-        the OldRebuildRateConstant is never actually used
-        once its value is retrieved from the controller.
-       */
-      unsigned char *OldRebuildRateConstant;
-      dma_addr_t OldRebuildRateConstantDMA;
-
-      OldRebuildRateConstant = pci_alloc_consistent( Controller->PCIDevice,
-		sizeof(char), &OldRebuildRateConstantDMA);
-      if (OldRebuildRateConstant == NULL) {
-         DAC960_UserCritical("Cancellation of Rebuild or "
-			     "Consistency Check Failed - "
-			     "Out of Memory",
-                             Controller);
-	 goto failure;
-      }
-      CommandMailbox->Type3R.CommandOpcode = DAC960_V1_RebuildControl;
-      CommandMailbox->Type3R.RebuildRateConstant = 0xFF;
-      CommandMailbox->Type3R.BusAddress = OldRebuildRateConstantDMA;
-      DAC960_ExecuteCommand(Command);
-      switch (Command->V1.CommandStatus)
-	{
-	case DAC960_V1_NormalCompletion:
-	  DAC960_UserCritical("Rebuild or Consistency Check Cancelled\n",
-			      Controller);
-	  break;
-	default:
-	  DAC960_UserCritical("Cancellation of Rebuild or "
-			      "Consistency Check Failed - "
-			      "Unexpected Status %04X\n",
-			      Controller, Command->V1.CommandStatus);
-	  break;
-	}
-failure:
-  	pci_free_consistent(Controller->PCIDevice, sizeof(char),
-		OldRebuildRateConstant, OldRebuildRateConstantDMA);
-    }
-  else DAC960_UserCritical("Illegal User Command: '%s'\n",
-			   Controller, UserCommand);
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  DAC960_DeallocateCommand(Command);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  return true;
-}
-
-
-/*
-  DAC960_V2_TranslatePhysicalDevice translates a Physical Device Channel and
-  TargetID into a Logical Device.  It returns true on success and false
-  on failure.
-*/
-
-static bool DAC960_V2_TranslatePhysicalDevice(DAC960_Command_T *Command,
-						 unsigned char Channel,
-						 unsigned char TargetID,
-						 unsigned short
-						   *LogicalDeviceNumber)
-{
-  DAC960_V2_CommandMailbox_T SavedCommandMailbox, *CommandMailbox;
-  DAC960_Controller_T *Controller =  Command->Controller;
-
-  CommandMailbox = &Command->V2.CommandMailbox;
-  memcpy(&SavedCommandMailbox, CommandMailbox,
-	 sizeof(DAC960_V2_CommandMailbox_T));
-
-  CommandMailbox->PhysicalDeviceInfo.CommandOpcode = DAC960_V2_IOCTL;
-  CommandMailbox->PhysicalDeviceInfo.CommandControlBits
-				    .DataTransferControllerToHost = true;
-  CommandMailbox->PhysicalDeviceInfo.CommandControlBits
-				    .NoAutoRequestSense = true;
-  CommandMailbox->PhysicalDeviceInfo.DataTransferSize =
-    sizeof(DAC960_V2_PhysicalToLogicalDevice_T);
-  CommandMailbox->PhysicalDeviceInfo.PhysicalDevice.TargetID = TargetID;
-  CommandMailbox->PhysicalDeviceInfo.PhysicalDevice.Channel = Channel;
-  CommandMailbox->PhysicalDeviceInfo.IOCTL_Opcode =
-    DAC960_V2_TranslatePhysicalToLogicalDevice;
-  CommandMailbox->Common.DataTransferMemoryAddress
-			.ScatterGatherSegments[0]
-			.SegmentDataPointer =
-    		Controller->V2.PhysicalToLogicalDeviceDMA;
-  CommandMailbox->Common.DataTransferMemoryAddress
-			.ScatterGatherSegments[0]
-			.SegmentByteCount =
-    		CommandMailbox->Common.DataTransferSize;
-
-  DAC960_ExecuteCommand(Command);
-  *LogicalDeviceNumber = Controller->V2.PhysicalToLogicalDevice->LogicalDeviceNumber;
-
-  memcpy(CommandMailbox, &SavedCommandMailbox,
-	 sizeof(DAC960_V2_CommandMailbox_T));
-  return (Command->V2.CommandStatus == DAC960_V2_NormalCompletion);
-}
-
-
-/*
-  DAC960_V2_ExecuteUserCommand executes a User Command for DAC960 V2 Firmware
-  Controllers.
-*/
-
-static bool DAC960_V2_ExecuteUserCommand(DAC960_Controller_T *Controller,
-					    unsigned char *UserCommand)
-{
-  DAC960_Command_T *Command;
-  DAC960_V2_CommandMailbox_T *CommandMailbox;
-  unsigned long flags;
-  unsigned char Channel, TargetID, LogicalDriveNumber;
-  unsigned short LogicalDeviceNumber;
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  while ((Command = DAC960_AllocateCommand(Controller)) == NULL)
-    DAC960_WaitForCommand(Controller);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  Controller->UserStatusLength = 0;
-  DAC960_V2_ClearCommand(Command);
-  Command->CommandType = DAC960_ImmediateCommand;
-  CommandMailbox = &Command->V2.CommandMailbox;
-  CommandMailbox->Common.CommandOpcode = DAC960_V2_IOCTL;
-  CommandMailbox->Common.CommandControlBits.DataTransferControllerToHost = true;
-  CommandMailbox->Common.CommandControlBits.NoAutoRequestSense = true;
-  if (strcmp(UserCommand, "flush-cache") == 0)
-    {
-      CommandMailbox->DeviceOperation.IOCTL_Opcode = DAC960_V2_PauseDevice;
-      CommandMailbox->DeviceOperation.OperationDevice =
-	DAC960_V2_RAID_Controller;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Cache Flush Completed\n", Controller);
-    }
-  else if (strncmp(UserCommand, "kill", 4) == 0 &&
-	   DAC960_ParsePhysicalDevice(Controller, &UserCommand[4],
-				      &Channel, &TargetID) &&
-	   DAC960_V2_TranslatePhysicalDevice(Command, Channel, TargetID,
-					     &LogicalDeviceNumber))
-    {
-      CommandMailbox->SetDeviceState.LogicalDevice.LogicalDeviceNumber =
-	LogicalDeviceNumber;
-      CommandMailbox->SetDeviceState.IOCTL_Opcode =
-	DAC960_V2_SetDeviceState;
-      CommandMailbox->SetDeviceState.DeviceState.PhysicalDeviceState =
-	DAC960_V2_Device_Dead;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Kill of Physical Device %d:%d %s\n",
-			  Controller, Channel, TargetID,
-			  (Command->V2.CommandStatus
-			   == DAC960_V2_NormalCompletion
-			   ? "Succeeded" : "Failed"));
-    }
-  else if (strncmp(UserCommand, "make-online", 11) == 0 &&
-	   DAC960_ParsePhysicalDevice(Controller, &UserCommand[11],
-				      &Channel, &TargetID) &&
-	   DAC960_V2_TranslatePhysicalDevice(Command, Channel, TargetID,
-					     &LogicalDeviceNumber))
-    {
-      CommandMailbox->SetDeviceState.LogicalDevice.LogicalDeviceNumber =
-	LogicalDeviceNumber;
-      CommandMailbox->SetDeviceState.IOCTL_Opcode =
-	DAC960_V2_SetDeviceState;
-      CommandMailbox->SetDeviceState.DeviceState.PhysicalDeviceState =
-	DAC960_V2_Device_Online;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Make Online of Physical Device %d:%d %s\n",
-			  Controller, Channel, TargetID,
-			  (Command->V2.CommandStatus
-			   == DAC960_V2_NormalCompletion
-			   ? "Succeeded" : "Failed"));
-    }
-  else if (strncmp(UserCommand, "make-standby", 12) == 0 &&
-	   DAC960_ParsePhysicalDevice(Controller, &UserCommand[12],
-				      &Channel, &TargetID) &&
-	   DAC960_V2_TranslatePhysicalDevice(Command, Channel, TargetID,
-					     &LogicalDeviceNumber))
-    {
-      CommandMailbox->SetDeviceState.LogicalDevice.LogicalDeviceNumber =
-	LogicalDeviceNumber;
-      CommandMailbox->SetDeviceState.IOCTL_Opcode =
-	DAC960_V2_SetDeviceState;
-      CommandMailbox->SetDeviceState.DeviceState.PhysicalDeviceState =
-	DAC960_V2_Device_Standby;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Make Standby of Physical Device %d:%d %s\n",
-			  Controller, Channel, TargetID,
-			  (Command->V2.CommandStatus
-			   == DAC960_V2_NormalCompletion
-			   ? "Succeeded" : "Failed"));
-    }
-  else if (strncmp(UserCommand, "rebuild", 7) == 0 &&
-	   DAC960_ParsePhysicalDevice(Controller, &UserCommand[7],
-				      &Channel, &TargetID) &&
-	   DAC960_V2_TranslatePhysicalDevice(Command, Channel, TargetID,
-					     &LogicalDeviceNumber))
-    {
-      CommandMailbox->LogicalDeviceInfo.LogicalDevice.LogicalDeviceNumber =
-	LogicalDeviceNumber;
-      CommandMailbox->LogicalDeviceInfo.IOCTL_Opcode =
-	DAC960_V2_RebuildDeviceStart;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Rebuild of Physical Device %d:%d %s\n",
-			  Controller, Channel, TargetID,
-			  (Command->V2.CommandStatus
-			   == DAC960_V2_NormalCompletion
-			   ? "Initiated" : "Not Initiated"));
-    }
-  else if (strncmp(UserCommand, "cancel-rebuild", 14) == 0 &&
-	   DAC960_ParsePhysicalDevice(Controller, &UserCommand[14],
-				      &Channel, &TargetID) &&
-	   DAC960_V2_TranslatePhysicalDevice(Command, Channel, TargetID,
-					     &LogicalDeviceNumber))
-    {
-      CommandMailbox->LogicalDeviceInfo.LogicalDevice.LogicalDeviceNumber =
-	LogicalDeviceNumber;
-      CommandMailbox->LogicalDeviceInfo.IOCTL_Opcode =
-	DAC960_V2_RebuildDeviceStop;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Rebuild of Physical Device %d:%d %s\n",
-			  Controller, Channel, TargetID,
-			  (Command->V2.CommandStatus
-			   == DAC960_V2_NormalCompletion
-			   ? "Cancelled" : "Not Cancelled"));
-    }
-  else if (strncmp(UserCommand, "check-consistency", 17) == 0 &&
-	   DAC960_ParseLogicalDrive(Controller, &UserCommand[17],
-				    &LogicalDriveNumber))
-    {
-      CommandMailbox->ConsistencyCheck.LogicalDevice.LogicalDeviceNumber =
-	LogicalDriveNumber;
-      CommandMailbox->ConsistencyCheck.IOCTL_Opcode =
-	DAC960_V2_ConsistencyCheckStart;
-      CommandMailbox->ConsistencyCheck.RestoreConsistency = true;
-      CommandMailbox->ConsistencyCheck.InitializedAreaOnly = false;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Consistency Check of Logical Drive %d "
-			  "(/dev/rd/c%dd%d) %s\n",
-			  Controller, LogicalDriveNumber,
-			  Controller->ControllerNumber,
-			  LogicalDriveNumber,
-			  (Command->V2.CommandStatus
-			   == DAC960_V2_NormalCompletion
-			   ? "Initiated" : "Not Initiated"));
-    }
-  else if (strncmp(UserCommand, "cancel-consistency-check", 24) == 0 &&
-	   DAC960_ParseLogicalDrive(Controller, &UserCommand[24],
-				    &LogicalDriveNumber))
-    {
-      CommandMailbox->ConsistencyCheck.LogicalDevice.LogicalDeviceNumber =
-	LogicalDriveNumber;
-      CommandMailbox->ConsistencyCheck.IOCTL_Opcode =
-	DAC960_V2_ConsistencyCheckStop;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Consistency Check of Logical Drive %d "
-			  "(/dev/rd/c%dd%d) %s\n",
-			  Controller, LogicalDriveNumber,
-			  Controller->ControllerNumber,
-			  LogicalDriveNumber,
-			  (Command->V2.CommandStatus
-			   == DAC960_V2_NormalCompletion
-			   ? "Cancelled" : "Not Cancelled"));
-    }
-  else if (strcmp(UserCommand, "perform-discovery") == 0)
-    {
-      CommandMailbox->Common.IOCTL_Opcode = DAC960_V2_StartDiscovery;
-      DAC960_ExecuteCommand(Command);
-      DAC960_UserCritical("Discovery %s\n", Controller,
-			  (Command->V2.CommandStatus
-			   == DAC960_V2_NormalCompletion
-			   ? "Initiated" : "Not Initiated"));
-      if (Command->V2.CommandStatus == DAC960_V2_NormalCompletion)
-	{
-	  CommandMailbox->ControllerInfo.CommandOpcode = DAC960_V2_IOCTL;
-	  CommandMailbox->ControllerInfo.CommandControlBits
-					.DataTransferControllerToHost = true;
-	  CommandMailbox->ControllerInfo.CommandControlBits
-					.NoAutoRequestSense = true;
-	  CommandMailbox->ControllerInfo.DataTransferSize =
-	    sizeof(DAC960_V2_ControllerInfo_T);
-	  CommandMailbox->ControllerInfo.ControllerNumber = 0;
-	  CommandMailbox->ControllerInfo.IOCTL_Opcode =
-	    DAC960_V2_GetControllerInfo;
-	  /*
-	   * How does this NOT race with the queued Monitoring
-	   * usage of this structure?
-	   */
-	  CommandMailbox->ControllerInfo.DataTransferMemoryAddress
-					.ScatterGatherSegments[0]
-					.SegmentDataPointer =
-	    Controller->V2.NewControllerInformationDMA;
-	  CommandMailbox->ControllerInfo.DataTransferMemoryAddress
-					.ScatterGatherSegments[0]
-					.SegmentByteCount =
-	    CommandMailbox->ControllerInfo.DataTransferSize;
-	  while (1) {
-	    DAC960_ExecuteCommand(Command);
-	    if (!Controller->V2.NewControllerInformation->PhysicalScanActive)
-		break;
-	    msleep(1000);
-	  }
-	  DAC960_UserCritical("Discovery Completed\n", Controller);
- 	}
-    }
-  else if (strcmp(UserCommand, "suppress-enclosure-messages") == 0)
-    Controller->SuppressEnclosureMessages = true;
-  else DAC960_UserCritical("Illegal User Command: '%s'\n",
-			   Controller, UserCommand);
-
-  spin_lock_irqsave(&Controller->queue_lock, flags);
-  DAC960_DeallocateCommand(Command);
-  spin_unlock_irqrestore(&Controller->queue_lock, flags);
-  return true;
-}
-
-static int __maybe_unused dac960_proc_show(struct seq_file *m, void *v)
-{
-  unsigned char *StatusMessage = "OK\n";
-  int ControllerNumber;
-  for (ControllerNumber = 0;
-       ControllerNumber < DAC960_ControllerCount;
-       ControllerNumber++)
-    {
-      DAC960_Controller_T *Controller = DAC960_Controllers[ControllerNumber];
-      if (Controller == NULL) continue;
-      if (Controller->MonitoringAlertMode)
-	{
-	  StatusMessage = "ALERT\n";
-	  break;
-	}
-    }
-  seq_puts(m, StatusMessage);
-  return 0;
-}
-
-static int __maybe_unused dac960_initial_status_proc_show(struct seq_file *m,
-							  void *v)
-{
-	DAC960_Controller_T *Controller = (DAC960_Controller_T *)m->private;
-	seq_printf(m, "%.*s", Controller->InitialStatusLength, Controller->CombinedStatusBuffer);
-	return 0;
-}
-
-static int __maybe_unused dac960_current_status_proc_show(struct seq_file *m,
-							  void *v)
-{
-  DAC960_Controller_T *Controller = (DAC960_Controller_T *) m->private;
-  unsigned char *StatusMessage =
-    "No Rebuild or Consistency Check in Progress\n";
-  int ProgressMessageLength = strlen(StatusMessage);
-  if (jiffies != Controller->LastCurrentStatusTime)
-    {
-      Controller->CurrentStatusLength = 0;
-      DAC960_AnnounceDriver(Controller);
-      DAC960_ReportControllerConfiguration(Controller);
-      DAC960_ReportDeviceConfiguration(Controller);
-      if (Controller->ProgressBufferLength > 0)
-	ProgressMessageLength = Controller->ProgressBufferLength;
-      if (DAC960_CheckStatusBuffer(Controller, 2 + ProgressMessageLength))
-	{
-	  unsigned char *CurrentStatusBuffer = Controller->CurrentStatusBuffer;
-	  CurrentStatusBuffer[Controller->CurrentStatusLength++] = ' ';
-	  CurrentStatusBuffer[Controller->CurrentStatusLength++] = ' ';
-	  if (Controller->ProgressBufferLength > 0)
-	    strcpy(&CurrentStatusBuffer[Controller->CurrentStatusLength],
-		   Controller->ProgressBuffer);
-	  else
-	    strcpy(&CurrentStatusBuffer[Controller->CurrentStatusLength],
-		   StatusMessage);
-	  Controller->CurrentStatusLength += ProgressMessageLength;
-	}
-      Controller->LastCurrentStatusTime = jiffies;
-    }
-	seq_printf(m, "%.*s", Controller->CurrentStatusLength, Controller->CurrentStatusBuffer);
-	return 0;
-}
-
-static int dac960_user_command_proc_show(struct seq_file *m, void *v)
-{
-	DAC960_Controller_T *Controller = (DAC960_Controller_T *)m->private;
-
-	seq_printf(m, "%.*s", Controller->UserStatusLength, Controller->UserStatusBuffer);
-	return 0;
-}
-
-static int dac960_user_command_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, dac960_user_command_proc_show, PDE_DATA(inode));
-}
-
-static ssize_t dac960_user_command_proc_write(struct file *file,
-				       const char __user *Buffer,
-				       size_t Count, loff_t *pos)
-{
-  DAC960_Controller_T *Controller = PDE_DATA(file_inode(file));
-  unsigned char CommandBuffer[80];
-  int Length;
-  if (Count > sizeof(CommandBuffer)-1) return -EINVAL;
-  if (copy_from_user(CommandBuffer, Buffer, Count)) return -EFAULT;
-  CommandBuffer[Count] = '\0';
-  Length = strlen(CommandBuffer);
-  if (Length > 0 && CommandBuffer[Length-1] == '\n')
-    CommandBuffer[--Length] = '\0';
-  if (Controller->FirmwareType == DAC960_V1_Controller)
-    return (DAC960_V1_ExecuteUserCommand(Controller, CommandBuffer)
-	    ? Count : -EBUSY);
-  else
-    return (DAC960_V2_ExecuteUserCommand(Controller, CommandBuffer)
-	    ? Count : -EBUSY);
-}
-
-static const struct file_operations dac960_user_command_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= dac960_user_command_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-	.write		= dac960_user_command_proc_write,
-};
-
-/*
-  DAC960_CreateProcEntries creates the /proc/rd/... entries for the
-  DAC960 Driver.
-*/
-
-static void DAC960_CreateProcEntries(DAC960_Controller_T *Controller)
-{
-	struct proc_dir_entry *ControllerProcEntry;
-
-	if (DAC960_ProcDirectoryEntry == NULL) {
-		DAC960_ProcDirectoryEntry = proc_mkdir("rd", NULL);
-		proc_create_single("status", 0, DAC960_ProcDirectoryEntry,
-				dac960_proc_show);
-	}
-
-	snprintf(Controller->ControllerName, sizeof(Controller->ControllerName),
-		 "c%d", Controller->ControllerNumber);
-	ControllerProcEntry = proc_mkdir(Controller->ControllerName,
-					 DAC960_ProcDirectoryEntry);
-	proc_create_single_data("initial_status", 0, ControllerProcEntry,
-			dac960_initial_status_proc_show, Controller);
-	proc_create_single_data("current_status", 0, ControllerProcEntry,
-			dac960_current_status_proc_show, Controller);
-	proc_create_data("user_command", 0600, ControllerProcEntry, &dac960_user_command_proc_fops, Controller);
-	Controller->ControllerProcEntry = ControllerProcEntry;
-}
-
-
-/*
-  DAC960_DestroyProcEntries destroys the /proc/rd/... entries for the
-  DAC960 Driver.
-*/
-
-static void DAC960_DestroyProcEntries(DAC960_Controller_T *Controller)
-{
-      if (Controller->ControllerProcEntry == NULL)
-	      return;
-      remove_proc_entry("initial_status", Controller->ControllerProcEntry);
-      remove_proc_entry("current_status", Controller->ControllerProcEntry);
-      remove_proc_entry("user_command", Controller->ControllerProcEntry);
-      remove_proc_entry(Controller->ControllerName, DAC960_ProcDirectoryEntry);
-      Controller->ControllerProcEntry = NULL;
-}
-
-#ifdef DAC960_GAM_MINOR
-
-static long DAC960_gam_get_controller_info(DAC960_ControllerInfo_T __user *UserSpaceControllerInfo)
-{
-	DAC960_ControllerInfo_T ControllerInfo;
-	DAC960_Controller_T *Controller;
-	int ControllerNumber;
-	long ErrorCode;
-
-	if (UserSpaceControllerInfo == NULL)
-		ErrorCode = -EINVAL;
-	else ErrorCode = get_user(ControllerNumber,
-			     &UserSpaceControllerInfo->ControllerNumber);
-	if (ErrorCode != 0)
-		goto out;
-	ErrorCode = -ENXIO;
-	if (ControllerNumber < 0 ||
-	    ControllerNumber > DAC960_ControllerCount - 1) {
-		goto out;
-	}
-	Controller = DAC960_Controllers[ControllerNumber];
-	if (Controller == NULL)
-		goto out;
-	memset(&ControllerInfo, 0, sizeof(DAC960_ControllerInfo_T));
-	ControllerInfo.ControllerNumber = ControllerNumber;
-	ControllerInfo.FirmwareType = Controller->FirmwareType;
-	ControllerInfo.Channels = Controller->Channels;
-	ControllerInfo.Targets = Controller->Targets;
-	ControllerInfo.PCI_Bus = Controller->Bus;
-	ControllerInfo.PCI_Device = Controller->Device;
-	ControllerInfo.PCI_Function = Controller->Function;
-	ControllerInfo.IRQ_Channel = Controller->IRQ_Channel;
-	ControllerInfo.PCI_Address = Controller->PCI_Address;
-	strcpy(ControllerInfo.ModelName, Controller->ModelName);
-	strcpy(ControllerInfo.FirmwareVersion, Controller->FirmwareVersion);
-	ErrorCode = (copy_to_user(UserSpaceControllerInfo, &ControllerInfo,
-			     sizeof(DAC960_ControllerInfo_T)) ? -EFAULT : 0);
-out:
-	return ErrorCode;
-}
-
-static long DAC960_gam_v1_execute_command(DAC960_V1_UserCommand_T __user *UserSpaceUserCommand)
-{
-	DAC960_V1_UserCommand_T UserCommand;
-	DAC960_Controller_T *Controller;
-	DAC960_Command_T *Command = NULL;
-	DAC960_V1_CommandOpcode_T CommandOpcode;
-	DAC960_V1_CommandStatus_T CommandStatus;
-	DAC960_V1_DCDB_T DCDB;
-	DAC960_V1_DCDB_T *DCDB_IOBUF = NULL;
-	dma_addr_t	DCDB_IOBUFDMA;
-	unsigned long flags;
-	int ControllerNumber, DataTransferLength;
-	unsigned char *DataTransferBuffer = NULL;
-	dma_addr_t DataTransferBufferDMA;
-        long ErrorCode;
-
-	if (UserSpaceUserCommand == NULL) {
-		ErrorCode = -EINVAL;
-		goto out;
-	}
-	if (copy_from_user(&UserCommand, UserSpaceUserCommand,
-				   sizeof(DAC960_V1_UserCommand_T))) {
-		ErrorCode = -EFAULT;
-		goto out;
-	}
-	ControllerNumber = UserCommand.ControllerNumber;
-    	ErrorCode = -ENXIO;
-	if (ControllerNumber < 0 ||
-	    ControllerNumber > DAC960_ControllerCount - 1)
-		goto out;
-	Controller = DAC960_Controllers[ControllerNumber];
-	if (Controller == NULL)
-		goto out;
-	ErrorCode = -EINVAL;
-	if (Controller->FirmwareType != DAC960_V1_Controller)
-		goto out;
-	CommandOpcode = UserCommand.CommandMailbox.Common.CommandOpcode;
-	DataTransferLength = UserCommand.DataTransferLength;
-	if (CommandOpcode & 0x80)
-		goto out;
-	if (CommandOpcode == DAC960_V1_DCDB)
-	  {
-	    if (copy_from_user(&DCDB, UserCommand.DCDB,
-			       sizeof(DAC960_V1_DCDB_T))) {
-		ErrorCode = -EFAULT;
-		goto out;
-	    }
-	    if (DCDB.Channel >= DAC960_V1_MaxChannels)
-		goto out;
-	    if (!((DataTransferLength == 0 &&
-		   DCDB.Direction
-		   == DAC960_V1_DCDB_NoDataTransfer) ||
-		  (DataTransferLength > 0 &&
-		   DCDB.Direction
-		   == DAC960_V1_DCDB_DataTransferDeviceToSystem) ||
-		  (DataTransferLength < 0 &&
-		   DCDB.Direction
-		   == DAC960_V1_DCDB_DataTransferSystemToDevice)))
-			goto out;
-	    if (((DCDB.TransferLengthHigh4 << 16) | DCDB.TransferLength)
-		!= abs(DataTransferLength))
-			goto out;
-	    DCDB_IOBUF = pci_alloc_consistent(Controller->PCIDevice,
-			sizeof(DAC960_V1_DCDB_T), &DCDB_IOBUFDMA);
-	    if (DCDB_IOBUF == NULL) {
-	    		ErrorCode = -ENOMEM;
-			goto out;
-		}
-	  }
-	ErrorCode = -ENOMEM;
-	if (DataTransferLength > 0)
-	  {
-	    DataTransferBuffer = pci_zalloc_consistent(Controller->PCIDevice,
-                                                       DataTransferLength,
-                                                       &DataTransferBufferDMA);
-	    if (DataTransferBuffer == NULL)
-		goto out;
-	  }
-	else if (DataTransferLength < 0)
-	  {
-	    DataTransferBuffer = pci_alloc_consistent(Controller->PCIDevice,
-				-DataTransferLength, &DataTransferBufferDMA);
-	    if (DataTransferBuffer == NULL)
-		goto out;
-	    if (copy_from_user(DataTransferBuffer,
-			       UserCommand.DataTransferBuffer,
-			       -DataTransferLength)) {
-		ErrorCode = -EFAULT;
-		goto out;
-	    }
-	  }
-	if (CommandOpcode == DAC960_V1_DCDB)
-	  {
-	    spin_lock_irqsave(&Controller->queue_lock, flags);
-	    while ((Command = DAC960_AllocateCommand(Controller)) == NULL)
-	      DAC960_WaitForCommand(Controller);
-	    while (Controller->V1.DirectCommandActive[DCDB.Channel]
-						     [DCDB.TargetID])
-	      {
-		spin_unlock_irq(&Controller->queue_lock);
-		__wait_event(Controller->CommandWaitQueue,
-			     !Controller->V1.DirectCommandActive
-					     [DCDB.Channel][DCDB.TargetID]);
-		spin_lock_irq(&Controller->queue_lock);
-	      }
-	    Controller->V1.DirectCommandActive[DCDB.Channel]
-					      [DCDB.TargetID] = true;
-	    spin_unlock_irqrestore(&Controller->queue_lock, flags);
-	    DAC960_V1_ClearCommand(Command);
-	    Command->CommandType = DAC960_ImmediateCommand;
-	    memcpy(&Command->V1.CommandMailbox, &UserCommand.CommandMailbox,
-		   sizeof(DAC960_V1_CommandMailbox_T));
-	    Command->V1.CommandMailbox.Type3.BusAddress = DCDB_IOBUFDMA;
-	    DCDB.BusAddress = DataTransferBufferDMA;
-	    memcpy(DCDB_IOBUF, &DCDB, sizeof(DAC960_V1_DCDB_T));
-	  }
-	else
-	  {
-	    spin_lock_irqsave(&Controller->queue_lock, flags);
-	    while ((Command = DAC960_AllocateCommand(Controller)) == NULL)
-	      DAC960_WaitForCommand(Controller);
-	    spin_unlock_irqrestore(&Controller->queue_lock, flags);
-	    DAC960_V1_ClearCommand(Command);
-	    Command->CommandType = DAC960_ImmediateCommand;
-	    memcpy(&Command->V1.CommandMailbox, &UserCommand.CommandMailbox,
-		   sizeof(DAC960_V1_CommandMailbox_T));
-	    if (DataTransferBuffer != NULL)
-	      Command->V1.CommandMailbox.Type3.BusAddress =
-		DataTransferBufferDMA;
-	  }
-	DAC960_ExecuteCommand(Command);
-	CommandStatus = Command->V1.CommandStatus;
-	spin_lock_irqsave(&Controller->queue_lock, flags);
-	DAC960_DeallocateCommand(Command);
-	spin_unlock_irqrestore(&Controller->queue_lock, flags);
-	if (DataTransferLength > 0)
-	  {
-	    if (copy_to_user(UserCommand.DataTransferBuffer,
-			     DataTransferBuffer, DataTransferLength)) {
-		ErrorCode = -EFAULT;
-		goto Failure1;
-            }
-	  }
-	if (CommandOpcode == DAC960_V1_DCDB)
-	  {
-	    /*
-	      I don't believe Target or Channel in the DCDB_IOBUF
-	      should be any different from the contents of DCDB.
-	     */
-	    Controller->V1.DirectCommandActive[DCDB.Channel]
-					      [DCDB.TargetID] = false;
-	    if (copy_to_user(UserCommand.DCDB, DCDB_IOBUF,
-			     sizeof(DAC960_V1_DCDB_T))) {
-		ErrorCode = -EFAULT;
-		goto Failure1;
-	    }
-	  }
-	ErrorCode = CommandStatus;
-      Failure1:
-	if (DataTransferBuffer != NULL)
-	  pci_free_consistent(Controller->PCIDevice, abs(DataTransferLength),
-			DataTransferBuffer, DataTransferBufferDMA);
-	if (DCDB_IOBUF != NULL)
-	  pci_free_consistent(Controller->PCIDevice, sizeof(DAC960_V1_DCDB_T),
-			DCDB_IOBUF, DCDB_IOBUFDMA);
-	out:
-	return ErrorCode;
-}
-
-static long DAC960_gam_v2_execute_command(DAC960_V2_UserCommand_T __user *UserSpaceUserCommand)
-{
-	DAC960_V2_UserCommand_T UserCommand;
-	DAC960_Controller_T *Controller;
-	DAC960_Command_T *Command = NULL;
-	DAC960_V2_CommandMailbox_T *CommandMailbox;
-	DAC960_V2_CommandStatus_T CommandStatus;
-	unsigned long flags;
-	int ControllerNumber, DataTransferLength;
-	int DataTransferResidue, RequestSenseLength;
-	unsigned char *DataTransferBuffer = NULL;
-	dma_addr_t DataTransferBufferDMA;
-	unsigned char *RequestSenseBuffer = NULL;
-	dma_addr_t RequestSenseBufferDMA;
-	long ErrorCode = -EINVAL;
-
-	if (UserSpaceUserCommand == NULL)
-		goto out;
-	if (copy_from_user(&UserCommand, UserSpaceUserCommand,
-			   sizeof(DAC960_V2_UserCommand_T))) {
-		ErrorCode = -EFAULT;
-		goto out;
-	}
-	ErrorCode = -ENXIO;
-	ControllerNumber = UserCommand.ControllerNumber;
-	if (ControllerNumber < 0 ||
-	    ControllerNumber > DAC960_ControllerCount - 1)
-		goto out;
-	Controller = DAC960_Controllers[ControllerNumber];
-	if (Controller == NULL)
-		goto out;
-	if (Controller->FirmwareType != DAC960_V2_Controller){
-		ErrorCode = -EINVAL;
-		goto out;
-	}
-	DataTransferLength = UserCommand.DataTransferLength;
-    	ErrorCode = -ENOMEM;
-	if (DataTransferLength > 0)
-	  {
-	    DataTransferBuffer = pci_zalloc_consistent(Controller->PCIDevice,
-                                                       DataTransferLength,
-                                                       &DataTransferBufferDMA);
-	    if (DataTransferBuffer == NULL)
-		goto out;
-	  }
-	else if (DataTransferLength < 0)
-	  {
-	    DataTransferBuffer = pci_alloc_consistent(Controller->PCIDevice,
-				-DataTransferLength, &DataTransferBufferDMA);
-	    if (DataTransferBuffer == NULL)
-		goto out;
-	    if (copy_from_user(DataTransferBuffer,
-			       UserCommand.DataTransferBuffer,
-			       -DataTransferLength)) {
-		ErrorCode = -EFAULT;
-		goto Failure2;
-	    }
-	  }
-	RequestSenseLength = UserCommand.RequestSenseLength;
-	if (RequestSenseLength > 0)
-	  {
-	    RequestSenseBuffer = pci_zalloc_consistent(Controller->PCIDevice,
-                                                       RequestSenseLength,
-                                                       &RequestSenseBufferDMA);
-	    if (RequestSenseBuffer == NULL)
-	      {
-		ErrorCode = -ENOMEM;
-		goto Failure2;
-	      }
-	  }
-	spin_lock_irqsave(&Controller->queue_lock, flags);
-	while ((Command = DAC960_AllocateCommand(Controller)) == NULL)
-	  DAC960_WaitForCommand(Controller);
-	spin_unlock_irqrestore(&Controller->queue_lock, flags);
-	DAC960_V2_ClearCommand(Command);
-	Command->CommandType = DAC960_ImmediateCommand;
-	CommandMailbox = &Command->V2.CommandMailbox;
-	memcpy(CommandMailbox, &UserCommand.CommandMailbox,
-	       sizeof(DAC960_V2_CommandMailbox_T));
-	CommandMailbox->Common.CommandControlBits
-			      .AdditionalScatterGatherListMemory = false;
-	CommandMailbox->Common.CommandControlBits
-			      .NoAutoRequestSense = true;
-	CommandMailbox->Common.DataTransferSize = 0;
-	CommandMailbox->Common.DataTransferPageNumber = 0;
-	memset(&CommandMailbox->Common.DataTransferMemoryAddress, 0,
-	       sizeof(DAC960_V2_DataTransferMemoryAddress_T));
-	if (DataTransferLength != 0)
-	  {
-	    if (DataTransferLength > 0)
-	      {
-		CommandMailbox->Common.CommandControlBits
-				      .DataTransferControllerToHost = true;
-		CommandMailbox->Common.DataTransferSize = DataTransferLength;
-	      }
-	    else
-	      {
-		CommandMailbox->Common.CommandControlBits
-				      .DataTransferControllerToHost = false;
-		CommandMailbox->Common.DataTransferSize = -DataTransferLength;
-	      }
-	    CommandMailbox->Common.DataTransferMemoryAddress
-				  .ScatterGatherSegments[0]
-				  .SegmentDataPointer = DataTransferBufferDMA;
-	    CommandMailbox->Common.DataTransferMemoryAddress
-				  .ScatterGatherSegments[0]
-				  .SegmentByteCount =
-	      CommandMailbox->Common.DataTransferSize;
-	  }
-	if (RequestSenseLength > 0)
-	  {
-	    CommandMailbox->Common.CommandControlBits
-				  .NoAutoRequestSense = false;
-	    CommandMailbox->Common.RequestSenseSize = RequestSenseLength;
-	    CommandMailbox->Common.RequestSenseBusAddress =
-	      						RequestSenseBufferDMA;
-	  }
-	DAC960_ExecuteCommand(Command);
-	CommandStatus = Command->V2.CommandStatus;
-	RequestSenseLength = Command->V2.RequestSenseLength;
-	DataTransferResidue = Command->V2.DataTransferResidue;
-	spin_lock_irqsave(&Controller->queue_lock, flags);
-	DAC960_DeallocateCommand(Command);
-	spin_unlock_irqrestore(&Controller->queue_lock, flags);
-	if (RequestSenseLength > UserCommand.RequestSenseLength)
-	  RequestSenseLength = UserCommand.RequestSenseLength;
-	if (copy_to_user(&UserSpaceUserCommand->DataTransferLength,
-				 &DataTransferResidue,
-				 sizeof(DataTransferResidue))) {
-		ErrorCode = -EFAULT;
-		goto Failure2;
-	}
-	if (copy_to_user(&UserSpaceUserCommand->RequestSenseLength,
-			 &RequestSenseLength, sizeof(RequestSenseLength))) {
-		ErrorCode = -EFAULT;
-		goto Failure2;
-	}
-	if (DataTransferLength > 0)
-	  {
-	    if (copy_to_user(UserCommand.DataTransferBuffer,
-			     DataTransferBuffer, DataTransferLength)) {
-		ErrorCode = -EFAULT;
-		goto Failure2;
-	    }
-	  }
-	if (RequestSenseLength > 0)
-	  {
-	    if (copy_to_user(UserCommand.RequestSenseBuffer,
-			     RequestSenseBuffer, RequestSenseLength)) {
-		ErrorCode = -EFAULT;
-		goto Failure2;
-	    }
-	  }
-	ErrorCode = CommandStatus;
-      Failure2:
-	  pci_free_consistent(Controller->PCIDevice, abs(DataTransferLength),
-		DataTransferBuffer, DataTransferBufferDMA);
-	if (RequestSenseBuffer != NULL)
-	  pci_free_consistent(Controller->PCIDevice, RequestSenseLength,
-		RequestSenseBuffer, RequestSenseBufferDMA);
-out:
-        return ErrorCode;
-}
-
-static long DAC960_gam_v2_get_health_status(DAC960_V2_GetHealthStatus_T __user *UserSpaceGetHealthStatus)
-{
-	DAC960_V2_GetHealthStatus_T GetHealthStatus;
-	DAC960_V2_HealthStatusBuffer_T HealthStatusBuffer;
-	DAC960_Controller_T *Controller;
-	int ControllerNumber;
-	long ErrorCode;
-
-	if (UserSpaceGetHealthStatus == NULL) {
-		ErrorCode = -EINVAL;
-		goto out;
-	}
-	if (copy_from_user(&GetHealthStatus, UserSpaceGetHealthStatus,
-			   sizeof(DAC960_V2_GetHealthStatus_T))) {
-		ErrorCode = -EFAULT;
-		goto out;
-	}
-	ErrorCode = -ENXIO;
-	ControllerNumber = GetHealthStatus.ControllerNumber;
-	if (ControllerNumber < 0 ||
-	    ControllerNumber > DAC960_ControllerCount - 1)
-		goto out;
-	Controller = DAC960_Controllers[ControllerNumber];
-	if (Controller == NULL)
-		goto out;
-	if (Controller->FirmwareType != DAC960_V2_Controller) {
-		ErrorCode = -EINVAL;
-		goto out;
-	}
-	if (copy_from_user(&HealthStatusBuffer,
-			   GetHealthStatus.HealthStatusBuffer,
-			   sizeof(DAC960_V2_HealthStatusBuffer_T))) {
-		ErrorCode = -EFAULT;
-		goto out;
-	}
-	ErrorCode = wait_event_interruptible_timeout(Controller->HealthStatusWaitQueue,
-			!(Controller->V2.HealthStatusBuffer->StatusChangeCounter
-			    == HealthStatusBuffer.StatusChangeCounter &&
-			  Controller->V2.HealthStatusBuffer->NextEventSequenceNumber
-			    == HealthStatusBuffer.NextEventSequenceNumber),
-			DAC960_MonitoringTimerInterval);
-	if (ErrorCode == -ERESTARTSYS) {
-		ErrorCode = -EINTR;
-		goto out;
-	}
-	if (copy_to_user(GetHealthStatus.HealthStatusBuffer,
-			 Controller->V2.HealthStatusBuffer,
-			 sizeof(DAC960_V2_HealthStatusBuffer_T)))
-		ErrorCode = -EFAULT;
-	else
-		ErrorCode =  0;
-
-out:
-	return ErrorCode;
-}
-
-/*
- * DAC960_gam_ioctl is the ioctl function for performing RAID operations.
-*/
-
-static long DAC960_gam_ioctl(struct file *file, unsigned int Request,
-						unsigned long Argument)
-{
-  long ErrorCode = 0;
-  void __user *argp = (void __user *)Argument;
-  if (!capable(CAP_SYS_ADMIN)) return -EACCES;
-
-  mutex_lock(&DAC960_mutex);
-  switch (Request)
-    {
-    case DAC960_IOCTL_GET_CONTROLLER_COUNT:
-      ErrorCode = DAC960_ControllerCount;
-      break;
-    case DAC960_IOCTL_GET_CONTROLLER_INFO:
-      ErrorCode = DAC960_gam_get_controller_info(argp);
-      break;
-    case DAC960_IOCTL_V1_EXECUTE_COMMAND:
-      ErrorCode = DAC960_gam_v1_execute_command(argp);
-      break;
-    case DAC960_IOCTL_V2_EXECUTE_COMMAND:
-      ErrorCode = DAC960_gam_v2_execute_command(argp);
-      break;
-    case DAC960_IOCTL_V2_GET_HEALTH_STATUS:
-      ErrorCode = DAC960_gam_v2_get_health_status(argp);
-      break;
-      default:
-	ErrorCode = -ENOTTY;
-    }
-  mutex_unlock(&DAC960_mutex);
-  return ErrorCode;
-}
-
-static const struct file_operations DAC960_gam_fops = {
-	.owner		= THIS_MODULE,
-	.unlocked_ioctl	= DAC960_gam_ioctl,
-	.llseek		= noop_llseek,
-};
-
-static struct miscdevice DAC960_gam_dev = {
-	DAC960_GAM_MINOR,
-	"dac960_gam",
-	&DAC960_gam_fops
-};
-
-static int DAC960_gam_init(void)
-{
-	int ret;
-
-	ret = misc_register(&DAC960_gam_dev);
-	if (ret)
-		printk(KERN_ERR "DAC960_gam: can't misc_register on minor %d\n", DAC960_GAM_MINOR);
-	return ret;
-}
-
-static void DAC960_gam_cleanup(void)
-{
-	misc_deregister(&DAC960_gam_dev);
-}
-
-#endif /* DAC960_GAM_MINOR */
-
-static struct DAC960_privdata DAC960_GEM_privdata = {
-	.HardwareType =		DAC960_GEM_Controller,
-	.FirmwareType 	=	DAC960_V2_Controller,
-	.InterruptHandler =	DAC960_GEM_InterruptHandler,
-	.MemoryWindowSize =	DAC960_GEM_RegisterWindowSize,
-};
-
-
-static struct DAC960_privdata DAC960_BA_privdata = {
-	.HardwareType =		DAC960_BA_Controller,
-	.FirmwareType 	=	DAC960_V2_Controller,
-	.InterruptHandler =	DAC960_BA_InterruptHandler,
-	.MemoryWindowSize =	DAC960_BA_RegisterWindowSize,
-};
-
-static struct DAC960_privdata DAC960_LP_privdata = {
-	.HardwareType =		DAC960_LP_Controller,
-	.FirmwareType 	=	DAC960_V2_Controller,
-	.InterruptHandler =	DAC960_LP_InterruptHandler,
-	.MemoryWindowSize =	DAC960_LP_RegisterWindowSize,
-};
-
-static struct DAC960_privdata DAC960_LA_privdata = {
-	.HardwareType =		DAC960_LA_Controller,
-	.FirmwareType 	=	DAC960_V1_Controller,
-	.InterruptHandler =	DAC960_LA_InterruptHandler,
-	.MemoryWindowSize =	DAC960_LA_RegisterWindowSize,
-};
-
-static struct DAC960_privdata DAC960_PG_privdata = {
-	.HardwareType =		DAC960_PG_Controller,
-	.FirmwareType 	=	DAC960_V1_Controller,
-	.InterruptHandler =	DAC960_PG_InterruptHandler,
-	.MemoryWindowSize =	DAC960_PG_RegisterWindowSize,
-};
-
-static struct DAC960_privdata DAC960_PD_privdata = {
-	.HardwareType =		DAC960_PD_Controller,
-	.FirmwareType 	=	DAC960_V1_Controller,
-	.InterruptHandler =	DAC960_PD_InterruptHandler,
-	.MemoryWindowSize =	DAC960_PD_RegisterWindowSize,
-};
-
-static struct DAC960_privdata DAC960_P_privdata = {
-	.HardwareType =		DAC960_P_Controller,
-	.FirmwareType 	=	DAC960_V1_Controller,
-	.InterruptHandler =	DAC960_P_InterruptHandler,
-	.MemoryWindowSize =	DAC960_PD_RegisterWindowSize,
-};
-
-static const struct pci_device_id DAC960_id_table[] = {
-	{
-		.vendor 	= PCI_VENDOR_ID_MYLEX,
-		.device		= PCI_DEVICE_ID_MYLEX_DAC960_GEM,
-		.subvendor	= PCI_VENDOR_ID_MYLEX,
-		.subdevice	= PCI_ANY_ID,
-		.driver_data	= (unsigned long) &DAC960_GEM_privdata,
-	},
-	{
-		.vendor 	= PCI_VENDOR_ID_MYLEX,
-		.device		= PCI_DEVICE_ID_MYLEX_DAC960_BA,
-		.subvendor	= PCI_ANY_ID,
-		.subdevice	= PCI_ANY_ID,
-		.driver_data	= (unsigned long) &DAC960_BA_privdata,
-	},
-	{
-		.vendor 	= PCI_VENDOR_ID_MYLEX,
-		.device		= PCI_DEVICE_ID_MYLEX_DAC960_LP,
-		.subvendor	= PCI_ANY_ID,
-		.subdevice	= PCI_ANY_ID,
-		.driver_data	= (unsigned long) &DAC960_LP_privdata,
-	},
-	{
-		.vendor 	= PCI_VENDOR_ID_DEC,
-		.device		= PCI_DEVICE_ID_DEC_21285,
-		.subvendor	= PCI_VENDOR_ID_MYLEX,
-		.subdevice	= PCI_DEVICE_ID_MYLEX_DAC960_LA,
-		.driver_data	= (unsigned long) &DAC960_LA_privdata,
-	},
-	{
-		.vendor 	= PCI_VENDOR_ID_MYLEX,
-		.device		= PCI_DEVICE_ID_MYLEX_DAC960_PG,
-		.subvendor	= PCI_ANY_ID,
-		.subdevice	= PCI_ANY_ID,
-		.driver_data	= (unsigned long) &DAC960_PG_privdata,
-	},
-	{
-		.vendor 	= PCI_VENDOR_ID_MYLEX,
-		.device		= PCI_DEVICE_ID_MYLEX_DAC960_PD,
-		.subvendor	= PCI_ANY_ID,
-		.subdevice	= PCI_ANY_ID,
-		.driver_data	= (unsigned long) &DAC960_PD_privdata,
-	},
-	{
-		.vendor 	= PCI_VENDOR_ID_MYLEX,
-		.device		= PCI_DEVICE_ID_MYLEX_DAC960_P,
-		.subvendor	= PCI_ANY_ID,
-		.subdevice	= PCI_ANY_ID,
-		.driver_data	= (unsigned long) &DAC960_P_privdata,
-	},
-	{0, },
-};
-
-MODULE_DEVICE_TABLE(pci, DAC960_id_table);
-
-static struct pci_driver DAC960_pci_driver = {
-	.name		= "DAC960",
-	.id_table	= DAC960_id_table,
-	.probe		= DAC960_Probe,
-	.remove		= DAC960_Remove,
-};
-
-static int __init DAC960_init_module(void)
-{
-	int ret;
-
-	ret =  pci_register_driver(&DAC960_pci_driver);
-#ifdef DAC960_GAM_MINOR
-	if (!ret)
-		DAC960_gam_init();
-#endif
-	return ret;
-}
-
-static void __exit DAC960_cleanup_module(void)
-{
-	int i;
-
-#ifdef DAC960_GAM_MINOR
-	DAC960_gam_cleanup();
-#endif
-
-	for (i = 0; i < DAC960_ControllerCount; i++) {
-		DAC960_Controller_T *Controller = DAC960_Controllers[i];
-		if (Controller == NULL)
-			continue;
-		DAC960_FinalizeController(Controller);
-	}
-	if (DAC960_ProcDirectoryEntry != NULL) {
-  		remove_proc_entry("rd/status", NULL);
-  		remove_proc_entry("rd", NULL);
-	}
-	DAC960_ControllerCount = 0;
-	pci_unregister_driver(&DAC960_pci_driver);
-}
-
-module_init(DAC960_init_module);
-module_exit(DAC960_cleanup_module);
-
-MODULE_LICENSE("GPL");

drivers/block/DAC960.h

@@ -1,4414 +0,0 @@
-/*
-
-  Linux Driver for Mylex DAC960/AcceleRAID/eXtremeRAID PCI RAID Controllers
-
-  Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
-
-  This program is free software; you may redistribute and/or modify it under
-  the terms of the GNU General Public License Version 2 as published by the
-  Free Software Foundation.
-
-  This program is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
-  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-  for complete details.
-
-  The author respectfully requests that any modifications to this software be
-  sent directly to him for evaluation and testing.
-
-*/
-
-
-/*
-  Define the maximum number of DAC960 Controllers supported by this driver.
-*/
-
-#define DAC960_MaxControllers			8
-
-
-/*
-  Define the maximum number of Controller Channels supported by DAC960
-  V1 and V2 Firmware Controllers.
-*/
-
-#define DAC960_V1_MaxChannels			3
-#define DAC960_V2_MaxChannels			4
-
-
-/*
-  Define the maximum number of Targets per Channel supported by DAC960
-  V1 and V2 Firmware Controllers.
-*/
-
-#define DAC960_V1_MaxTargets			16
-#define DAC960_V2_MaxTargets			128
-
-
-/*
-  Define the maximum number of Logical Drives supported by DAC960
-  V1 and V2 Firmware Controllers.
-*/
-
-#define DAC960_MaxLogicalDrives			32
-
-
-/*
-  Define the maximum number of Physical Devices supported by DAC960
-  V1 and V2 Firmware Controllers.
-*/
-
-#define DAC960_V1_MaxPhysicalDevices		45
-#define DAC960_V2_MaxPhysicalDevices		272
-
-/*
-  Define a 32/64 bit I/O Address data type.
-*/
-
-typedef unsigned long DAC960_IO_Address_T;
-
-
-/*
-  Define a 32/64 bit PCI Bus Address data type.
-*/
-
-typedef unsigned long DAC960_PCI_Address_T;
-
-
-/*
-  Define a 32 bit Bus Address data type.
-*/
-
-typedef unsigned int DAC960_BusAddress32_T;
-
-
-/*
-  Define a 64 bit Bus Address data type.
-*/
-
-typedef unsigned long long DAC960_BusAddress64_T;
-
-
-/*
-  Define a 32 bit Byte Count data type.
-*/
-
-typedef unsigned int DAC960_ByteCount32_T;
-
-
-/*
-  Define a 64 bit Byte Count data type.
-*/
-
-typedef unsigned long long DAC960_ByteCount64_T;
-
-
-/*
-  dma_loaf is used by helper routines to divide a region of
-  dma mapped memory into smaller pieces, where those pieces
-  are not of uniform size.
- */
-
-struct dma_loaf {
-	void	*cpu_base;
-	dma_addr_t dma_base;
-	size_t  length;
-	void	*cpu_free;
-	dma_addr_t dma_free;
-};
-
-/*
-  Define the SCSI INQUIRY Standard Data structure.
-*/
-
-typedef struct DAC960_SCSI_Inquiry
-{
-  unsigned char PeripheralDeviceType:5;			/* Byte 0 Bits 0-4 */
-  unsigned char PeripheralQualifier:3;			/* Byte 0 Bits 5-7 */
-  unsigned char DeviceTypeModifier:7;			/* Byte 1 Bits 0-6 */
-  bool RMB:1;						/* Byte 1 Bit 7 */
-  unsigned char ANSI_ApprovedVersion:3;			/* Byte 2 Bits 0-2 */
-  unsigned char ECMA_Version:3;				/* Byte 2 Bits 3-5 */
-  unsigned char ISO_Version:2;				/* Byte 2 Bits 6-7 */
-  unsigned char ResponseDataFormat:4;			/* Byte 3 Bits 0-3 */
-  unsigned char :2;					/* Byte 3 Bits 4-5 */
-  bool TrmIOP:1;					/* Byte 3 Bit 6 */
-  bool AENC:1;						/* Byte 3 Bit 7 */
-  unsigned char AdditionalLength;			/* Byte 4 */
-  unsigned char :8;					/* Byte 5 */
-  unsigned char :8;					/* Byte 6 */
-  bool SftRe:1;						/* Byte 7 Bit 0 */
-  bool CmdQue:1;					/* Byte 7 Bit 1 */
-  bool :1;						/* Byte 7 Bit 2 */
-  bool Linked:1;					/* Byte 7 Bit 3 */
-  bool Sync:1;						/* Byte 7 Bit 4 */
-  bool WBus16:1;					/* Byte 7 Bit 5 */
-  bool WBus32:1;					/* Byte 7 Bit 6 */
-  bool RelAdr:1;					/* Byte 7 Bit 7 */
-  unsigned char VendorIdentification[8];		/* Bytes 8-15 */
-  unsigned char ProductIdentification[16];		/* Bytes 16-31 */
-  unsigned char ProductRevisionLevel[4];		/* Bytes 32-35 */
-}
-DAC960_SCSI_Inquiry_T;
-
-
-/*
-  Define the SCSI INQUIRY Unit Serial Number structure.
-*/
-
-typedef struct DAC960_SCSI_Inquiry_UnitSerialNumber
-{
-  unsigned char PeripheralDeviceType:5;			/* Byte 0 Bits 0-4 */
-  unsigned char PeripheralQualifier:3;			/* Byte 0 Bits 5-7 */
-  unsigned char PageCode;				/* Byte 1 */
-  unsigned char :8;					/* Byte 2 */
-  unsigned char PageLength;				/* Byte 3 */
-  unsigned char ProductSerialNumber[28];		/* Bytes 4-31 */
-}
-DAC960_SCSI_Inquiry_UnitSerialNumber_T;
-
-
-/*
-  Define the SCSI REQUEST SENSE Sense Key type.
-*/
-
-typedef enum
-{
-  DAC960_SenseKey_NoSense =			0x0,
-  DAC960_SenseKey_RecoveredError =		0x1,
-  DAC960_SenseKey_NotReady =			0x2,
-  DAC960_SenseKey_MediumError =			0x3,
-  DAC960_SenseKey_HardwareError =		0x4,
-  DAC960_SenseKey_IllegalRequest =		0x5,
-  DAC960_SenseKey_UnitAttention =		0x6,
-  DAC960_SenseKey_DataProtect =			0x7,
-  DAC960_SenseKey_BlankCheck =			0x8,
-  DAC960_SenseKey_VendorSpecific =		0x9,
-  DAC960_SenseKey_CopyAborted =			0xA,
-  DAC960_SenseKey_AbortedCommand =		0xB,
-  DAC960_SenseKey_Equal =			0xC,
-  DAC960_SenseKey_VolumeOverflow =		0xD,
-  DAC960_SenseKey_Miscompare =			0xE,
-  DAC960_SenseKey_Reserved =			0xF
-}
-__attribute__ ((packed))
-DAC960_SCSI_RequestSenseKey_T;
-
-
-/*
-  Define the SCSI REQUEST SENSE structure.
-*/
-
-typedef struct DAC960_SCSI_RequestSense
-{
-  unsigned char ErrorCode:7;				/* Byte 0 Bits 0-6 */
-  bool Valid:1;						/* Byte 0 Bit 7 */
-  unsigned char SegmentNumber;				/* Byte 1 */
-  DAC960_SCSI_RequestSenseKey_T SenseKey:4;		/* Byte 2 Bits 0-3 */
-  unsigned char :1;					/* Byte 2 Bit 4 */
-  bool ILI:1;						/* Byte 2 Bit 5 */
-  bool EOM:1;						/* Byte 2 Bit 6 */
-  bool Filemark:1;					/* Byte 2 Bit 7 */
-  unsigned char Information[4];				/* Bytes 3-6 */
-  unsigned char AdditionalSenseLength;			/* Byte 7 */
-  unsigned char CommandSpecificInformation[4];		/* Bytes 8-11 */
-  unsigned char AdditionalSenseCode;			/* Byte 12 */
-  unsigned char AdditionalSenseCodeQualifier;		/* Byte 13 */
-}
-DAC960_SCSI_RequestSense_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Command Opcodes.
-*/
-
-typedef enum
-{
-  /* I/O Commands */
-  DAC960_V1_ReadExtended =			0x33,
-  DAC960_V1_WriteExtended =			0x34,
-  DAC960_V1_ReadAheadExtended =			0x35,
-  DAC960_V1_ReadExtendedWithScatterGather =	0xB3,
-  DAC960_V1_WriteExtendedWithScatterGather =	0xB4,
-  DAC960_V1_Read =				0x36,
-  DAC960_V1_ReadWithScatterGather =		0xB6,
-  DAC960_V1_Write =				0x37,
-  DAC960_V1_WriteWithScatterGather =		0xB7,
-  DAC960_V1_DCDB =				0x04,
-  DAC960_V1_DCDBWithScatterGather =		0x84,
-  DAC960_V1_Flush =				0x0A,
-  /* Controller Status Related Commands */
-  DAC960_V1_Enquiry =				0x53,
-  DAC960_V1_Enquiry2 =				0x1C,
-  DAC960_V1_GetLogicalDriveElement =		0x55,
-  DAC960_V1_GetLogicalDriveInformation =	0x19,
-  DAC960_V1_IOPortRead =			0x39,
-  DAC960_V1_IOPortWrite =			0x3A,
-  DAC960_V1_GetSDStats =			0x3E,
-  DAC960_V1_GetPDStats =			0x3F,
-  DAC960_V1_PerformEventLogOperation =		0x72,
-  /* Device Related Commands */
-  DAC960_V1_StartDevice =			0x10,
-  DAC960_V1_GetDeviceState =			0x50,
-  DAC960_V1_StopChannel =			0x13,
-  DAC960_V1_StartChannel =			0x12,
-  DAC960_V1_ResetChannel =			0x1A,
-  /* Commands Associated with Data Consistency and Errors */
-  DAC960_V1_Rebuild =				0x09,
-  DAC960_V1_RebuildAsync =			0x16,
-  DAC960_V1_CheckConsistency =			0x0F,
-  DAC960_V1_CheckConsistencyAsync =		0x1E,
-  DAC960_V1_RebuildStat =			0x0C,
-  DAC960_V1_GetRebuildProgress =		0x27,
-  DAC960_V1_RebuildControl =			0x1F,
-  DAC960_V1_ReadBadBlockTable =			0x0B,
-  DAC960_V1_ReadBadDataTable =			0x25,
-  DAC960_V1_ClearBadDataTable =			0x26,
-  DAC960_V1_GetErrorTable =			0x17,
-  DAC960_V1_AddCapacityAsync =			0x2A,
-  DAC960_V1_BackgroundInitializationControl =	0x2B,
-  /* Configuration Related Commands */
-  DAC960_V1_ReadConfig2 =			0x3D,
-  DAC960_V1_WriteConfig2 =			0x3C,
-  DAC960_V1_ReadConfigurationOnDisk =		0x4A,
-  DAC960_V1_WriteConfigurationOnDisk =		0x4B,
-  DAC960_V1_ReadConfiguration =			0x4E,
-  DAC960_V1_ReadBackupConfiguration =		0x4D,
-  DAC960_V1_WriteConfiguration =		0x4F,
-  DAC960_V1_AddConfiguration =			0x4C,
-  DAC960_V1_ReadConfigurationLabel =		0x48,
-  DAC960_V1_WriteConfigurationLabel =		0x49,
-  /* Firmware Upgrade Related Commands */
-  DAC960_V1_LoadImage =				0x20,
-  DAC960_V1_StoreImage =			0x21,
-  DAC960_V1_ProgramImage =			0x22,
-  /* Diagnostic Commands */
-  DAC960_V1_SetDiagnosticMode =			0x31,
-  DAC960_V1_RunDiagnostic =			0x32,
-  /* Subsystem Service Commands */
-  DAC960_V1_GetSubsystemData =			0x70,
-  DAC960_V1_SetSubsystemParameters =		0x71,
-  /* Version 2.xx Firmware Commands */
-  DAC960_V1_Enquiry_Old =			0x05,
-  DAC960_V1_GetDeviceState_Old =		0x14,
-  DAC960_V1_Read_Old =				0x02,
-  DAC960_V1_Write_Old =				0x03,
-  DAC960_V1_ReadWithScatterGather_Old =		0x82,
-  DAC960_V1_WriteWithScatterGather_Old =	0x83
-}
-__attribute__ ((packed))
-DAC960_V1_CommandOpcode_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Command Identifier type.
-*/
-
-typedef unsigned char DAC960_V1_CommandIdentifier_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Command Status Codes.
-*/
-
-#define DAC960_V1_NormalCompletion		0x0000	/* Common */
-#define DAC960_V1_CheckConditionReceived	0x0002	/* Common */
-#define DAC960_V1_NoDeviceAtAddress		0x0102	/* Common */
-#define DAC960_V1_InvalidDeviceAddress		0x0105	/* Common */
-#define DAC960_V1_InvalidParameter		0x0105	/* Common */
-#define DAC960_V1_IrrecoverableDataError	0x0001	/* I/O */
-#define DAC960_V1_LogicalDriveNonexistentOrOffline 0x0002 /* I/O */
-#define DAC960_V1_AccessBeyondEndOfLogicalDrive	0x0105	/* I/O */
-#define DAC960_V1_BadDataEncountered		0x010C	/* I/O */
-#define DAC960_V1_DeviceBusy			0x0008	/* DCDB */
-#define DAC960_V1_DeviceNonresponsive		0x000E	/* DCDB */
-#define DAC960_V1_CommandTerminatedAbnormally	0x000F	/* DCDB */
-#define DAC960_V1_UnableToStartDevice		0x0002	/* Device */
-#define DAC960_V1_InvalidChannelOrTargetOrModifier 0x0105 /* Device */
-#define DAC960_V1_ChannelBusy			0x0106	/* Device */
-#define DAC960_V1_ChannelNotStopped		0x0002	/* Device */
-#define DAC960_V1_AttemptToRebuildOnlineDrive	0x0002	/* Consistency */
-#define DAC960_V1_RebuildBadBlocksEncountered	0x0003	/* Consistency */
-#define DAC960_V1_NewDiskFailedDuringRebuild	0x0004	/* Consistency */
-#define DAC960_V1_RebuildOrCheckAlreadyInProgress 0x0106 /* Consistency */
-#define DAC960_V1_DependentDiskIsDead		0x0002	/* Consistency */
-#define DAC960_V1_InconsistentBlocksFound	0x0003	/* Consistency */
-#define DAC960_V1_InvalidOrNonredundantLogicalDrive 0x0105 /* Consistency */
-#define DAC960_V1_NoRebuildOrCheckInProgress	0x0105	/* Consistency */
-#define DAC960_V1_RebuildInProgress_DataValid	0x0000	/* Consistency */
-#define DAC960_V1_RebuildFailed_LogicalDriveFailure 0x0002 /* Consistency */
-#define DAC960_V1_RebuildFailed_BadBlocksOnOther 0x0003	/* Consistency */
-#define DAC960_V1_RebuildFailed_NewDriveFailed	0x0004	/* Consistency */
-#define DAC960_V1_RebuildSuccessful		0x0100	/* Consistency */
-#define DAC960_V1_RebuildSuccessfullyTerminated	0x0107	/* Consistency */
-#define DAC960_V1_BackgroundInitSuccessful	0x0100	/* Consistency */
-#define DAC960_V1_BackgroundInitAborted		0x0005	/* Consistency */
-#define DAC960_V1_NoBackgroundInitInProgress	0x0105	/* Consistency */
-#define DAC960_V1_AddCapacityInProgress		0x0004	/* Consistency */
-#define DAC960_V1_AddCapacityFailedOrSuspended	0x00F4	/* Consistency */
-#define DAC960_V1_Config2ChecksumError		0x0002	/* Configuration */
-#define DAC960_V1_ConfigurationSuspended	0x0106	/* Configuration */
-#define DAC960_V1_FailedToConfigureNVRAM	0x0105	/* Configuration */
-#define DAC960_V1_ConfigurationNotSavedStateChange 0x0106 /* Configuration */
-#define DAC960_V1_SubsystemNotInstalled		0x0001	/* Subsystem */
-#define DAC960_V1_SubsystemFailed		0x0002	/* Subsystem */
-#define DAC960_V1_SubsystemBusy			0x0106	/* Subsystem */
-
-typedef unsigned short DAC960_V1_CommandStatus_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Enquiry Command reply structure.
-*/
-
-typedef struct DAC960_V1_Enquiry
-{
-  unsigned char NumberOfLogicalDrives;			/* Byte 0 */
-  unsigned int :24;					/* Bytes 1-3 */
-  unsigned int LogicalDriveSizes[32];			/* Bytes 4-131 */
-  unsigned short FlashAge;				/* Bytes 132-133 */
-  struct {
-    bool DeferredWriteError:1;				/* Byte 134 Bit 0 */
-    bool BatteryLow:1;					/* Byte 134 Bit 1 */
-    unsigned char :6;					/* Byte 134 Bits 2-7 */
-  } StatusFlags;
-  unsigned char :8;					/* Byte 135 */
-  unsigned char MinorFirmwareVersion;			/* Byte 136 */
-  unsigned char MajorFirmwareVersion;			/* Byte 137 */
-  enum {
-    DAC960_V1_NoStandbyRebuildOrCheckInProgress =		    0x00,
-    DAC960_V1_StandbyRebuildInProgress =			    0x01,
-    DAC960_V1_BackgroundRebuildInProgress =			    0x02,
-    DAC960_V1_BackgroundCheckInProgress =			    0x03,
-    DAC960_V1_StandbyRebuildCompletedWithError =		    0xFF,
-    DAC960_V1_BackgroundRebuildOrCheckFailed_DriveFailed =	    0xF0,
-    DAC960_V1_BackgroundRebuildOrCheckFailed_LogicalDriveFailed =   0xF1,
-    DAC960_V1_BackgroundRebuildOrCheckFailed_OtherCauses =	    0xF2,
-    DAC960_V1_BackgroundRebuildOrCheckSuccessfullyTerminated =	    0xF3
-  } __attribute__ ((packed)) RebuildFlag;		/* Byte 138 */
-  unsigned char MaxCommands;				/* Byte 139 */
-  unsigned char OfflineLogicalDriveCount;		/* Byte 140 */
-  unsigned char :8;					/* Byte 141 */
-  unsigned short EventLogSequenceNumber;		/* Bytes 142-143 */
-  unsigned char CriticalLogicalDriveCount;		/* Byte 144 */
-  unsigned int :24;					/* Bytes 145-147 */
-  unsigned char DeadDriveCount;				/* Byte 148 */
-  unsigned char :8;					/* Byte 149 */
-  unsigned char RebuildCount;				/* Byte 150 */
-  struct {
-    unsigned char :3;					/* Byte 151 Bits 0-2 */
-    bool BatteryBackupUnitPresent:1;			/* Byte 151 Bit 3 */
-    unsigned char :3;					/* Byte 151 Bits 4-6 */
-    unsigned char :1;					/* Byte 151 Bit 7 */
-  } MiscFlags;
-  struct {
-    unsigned char TargetID;
-    unsigned char Channel;
-  } DeadDrives[21];					/* Bytes 152-194 */
-  unsigned char Reserved[62];				/* Bytes 195-255 */
-}
-__attribute__ ((packed))
-DAC960_V1_Enquiry_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Enquiry2 Command reply structure.
-*/
-
-typedef struct DAC960_V1_Enquiry2
-{
-  struct {
-    enum {
-      DAC960_V1_P_PD_PU =			0x01,
-      DAC960_V1_PL =				0x02,
-      DAC960_V1_PG =				0x10,
-      DAC960_V1_PJ =				0x11,
-      DAC960_V1_PR =				0x12,
-      DAC960_V1_PT =				0x13,
-      DAC960_V1_PTL0 =				0x14,
-      DAC960_V1_PRL =				0x15,
-      DAC960_V1_PTL1 =				0x16,
-      DAC960_V1_1164P =				0x20
-    } __attribute__ ((packed)) SubModel;		/* Byte 0 */
-    unsigned char ActualChannels;			/* Byte 1 */
-    enum {
-      DAC960_V1_FiveChannelBoard =		0x01,
-      DAC960_V1_ThreeChannelBoard =		0x02,
-      DAC960_V1_TwoChannelBoard =		0x03,
-      DAC960_V1_ThreeChannelASIC_DAC =		0x04
-    } __attribute__ ((packed)) Model;			/* Byte 2 */
-    enum {
-      DAC960_V1_EISA_Controller =		0x01,
-      DAC960_V1_MicroChannel_Controller =	0x02,
-      DAC960_V1_PCI_Controller =		0x03,
-      DAC960_V1_SCSItoSCSI_Controller =		0x08
-    } __attribute__ ((packed)) ProductFamily;		/* Byte 3 */
-  } HardwareID;						/* Bytes 0-3 */
-  /* MajorVersion.MinorVersion-FirmwareType-TurnID */
-  struct {
-    unsigned char MajorVersion;				/* Byte 4 */
-    unsigned char MinorVersion;				/* Byte 5 */
-    unsigned char TurnID;				/* Byte 6 */
-    char FirmwareType;					/* Byte 7 */
-  } FirmwareID;						/* Bytes 4-7 */
-  unsigned char :8;					/* Byte 8 */
-  unsigned int :24;					/* Bytes 9-11 */
-  unsigned char ConfiguredChannels;			/* Byte 12 */
-  unsigned char ActualChannels;				/* Byte 13 */
-  unsigned char MaxTargets;				/* Byte 14 */
-  unsigned char MaxTags;				/* Byte 15 */
-  unsigned char MaxLogicalDrives;			/* Byte 16 */
-  unsigned char MaxArms;				/* Byte 17 */
-  unsigned char MaxSpans;				/* Byte 18 */
-  unsigned char :8;					/* Byte 19 */
-  unsigned int :32;					/* Bytes 20-23 */
-  unsigned int MemorySize;				/* Bytes 24-27 */
-  unsigned int CacheSize;				/* Bytes 28-31 */
-  unsigned int FlashMemorySize;				/* Bytes 32-35 */
-  unsigned int NonVolatileMemorySize;			/* Bytes 36-39 */
-  struct {
-    enum {
-      DAC960_V1_RamType_DRAM =			0x0,
-      DAC960_V1_RamType_EDO =			0x1,
-      DAC960_V1_RamType_SDRAM =			0x2,
-      DAC960_V1_RamType_Last =			0x7
-    } __attribute__ ((packed)) RamType:3;		/* Byte 40 Bits 0-2 */
-    enum {
-      DAC960_V1_ErrorCorrection_None =		0x0,
-      DAC960_V1_ErrorCorrection_Parity =	0x1,
-      DAC960_V1_ErrorCorrection_ECC =		0x2,
-      DAC960_V1_ErrorCorrection_Last =		0x7
-    } __attribute__ ((packed)) ErrorCorrection:3;	/* Byte 40 Bits 3-5 */
-    bool FastPageMode:1;				/* Byte 40 Bit 6 */
-    bool LowPowerMemory:1;				/* Byte 40 Bit 7 */
-    unsigned char :8;					/* Bytes 41 */
-  } MemoryType;
-  unsigned short ClockSpeed;				/* Bytes 42-43 */
-  unsigned short MemorySpeed;				/* Bytes 44-45 */
-  unsigned short HardwareSpeed;				/* Bytes 46-47 */
-  unsigned int :32;					/* Bytes 48-51 */
-  unsigned int :32;					/* Bytes 52-55 */
-  unsigned char :8;					/* Byte 56 */
-  unsigned char :8;					/* Byte 57 */
-  unsigned short :16;					/* Bytes 58-59 */
-  unsigned short MaxCommands;				/* Bytes 60-61 */
-  unsigned short MaxScatterGatherEntries;		/* Bytes 62-63 */
-  unsigned short MaxDriveCommands;			/* Bytes 64-65 */
-  unsigned short MaxIODescriptors;			/* Bytes 66-67 */
-  unsigned short MaxCombinedSectors;			/* Bytes 68-69 */
-  unsigned char Latency;				/* Byte 70 */
-  unsigned char :8;					/* Byte 71 */
-  unsigned char SCSITimeout;				/* Byte 72 */
-  unsigned char :8;					/* Byte 73 */
-  unsigned short MinFreeLines;				/* Bytes 74-75 */
-  unsigned int :32;					/* Bytes 76-79 */
-  unsigned int :32;					/* Bytes 80-83 */
-  unsigned char RebuildRateConstant;			/* Byte 84 */
-  unsigned char :8;					/* Byte 85 */
-  unsigned char :8;					/* Byte 86 */
-  unsigned char :8;					/* Byte 87 */
-  unsigned int :32;					/* Bytes 88-91 */
-  unsigned int :32;					/* Bytes 92-95 */
-  unsigned short PhysicalDriveBlockSize;		/* Bytes 96-97 */
-  unsigned short LogicalDriveBlockSize;			/* Bytes 98-99 */
-  unsigned short MaxBlocksPerCommand;			/* Bytes 100-101 */
-  unsigned short BlockFactor;				/* Bytes 102-103 */
-  unsigned short CacheLineSize;				/* Bytes 104-105 */
-  struct {
-    enum {
-      DAC960_V1_Narrow_8bit =			0x0,
-      DAC960_V1_Wide_16bit =			0x1,
-      DAC960_V1_Wide_32bit =			0x2
-    } __attribute__ ((packed)) BusWidth:2;		/* Byte 106 Bits 0-1 */
-    enum {
-      DAC960_V1_Fast =				0x0,
-      DAC960_V1_Ultra =				0x1,
-      DAC960_V1_Ultra2 =			0x2
-    } __attribute__ ((packed)) BusSpeed:2;		/* Byte 106 Bits 2-3 */
-    bool Differential:1;				/* Byte 106 Bit 4 */
-    unsigned char :3;					/* Byte 106 Bits 5-7 */
-  } SCSICapability;
-  unsigned char :8;					/* Byte 107 */
-  unsigned int :32;					/* Bytes 108-111 */
-  unsigned short FirmwareBuildNumber;			/* Bytes 112-113 */
-  enum {
-    DAC960_V1_AEMI =				0x01,
-    DAC960_V1_OEM1 =				0x02,
-    DAC960_V1_OEM2 =				0x04,
-    DAC960_V1_OEM3 =				0x08,
-    DAC960_V1_Conner =				0x10,
-    DAC960_V1_SAFTE =				0x20
-  } __attribute__ ((packed)) FaultManagementType;	/* Byte 114 */
-  unsigned char :8;					/* Byte 115 */
-  struct {
-    bool Clustering:1;					/* Byte 116 Bit 0 */
-    bool MylexOnlineRAIDExpansion:1;			/* Byte 116 Bit 1 */
-    bool ReadAhead:1;					/* Byte 116 Bit 2 */
-    bool BackgroundInitialization:1;			/* Byte 116 Bit 3 */
-    unsigned int :28;					/* Bytes 116-119 */
-  } FirmwareFeatures;
-  unsigned int :32;					/* Bytes 120-123 */
-  unsigned int :32;					/* Bytes 124-127 */
-}
-DAC960_V1_Enquiry2_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Logical Drive State type.
-*/
-
-typedef enum
-{
-  DAC960_V1_LogicalDrive_Online =		0x03,
-  DAC960_V1_LogicalDrive_Critical =		0x04,
-  DAC960_V1_LogicalDrive_Offline =		0xFF
-}
-__attribute__ ((packed))
-DAC960_V1_LogicalDriveState_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Logical Drive Information structure.
-*/
-
-typedef struct DAC960_V1_LogicalDriveInformation
-{
-  unsigned int LogicalDriveSize;			/* Bytes 0-3 */
-  DAC960_V1_LogicalDriveState_T LogicalDriveState;	/* Byte 4 */
-  unsigned char RAIDLevel:7;				/* Byte 5 Bits 0-6 */
-  bool WriteBack:1;					/* Byte 5 Bit 7 */
-  unsigned short :16;					/* Bytes 6-7 */
-}
-DAC960_V1_LogicalDriveInformation_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Get Logical Drive Information Command
-  reply structure.
-*/
-
-typedef DAC960_V1_LogicalDriveInformation_T
-	DAC960_V1_LogicalDriveInformationArray_T[DAC960_MaxLogicalDrives];
-
-
-/*
-  Define the DAC960 V1 Firmware Perform Event Log Operation Types.
-*/
-
-typedef enum
-{
-  DAC960_V1_GetEventLogEntry =			0x00
-}
-__attribute__ ((packed))
-DAC960_V1_PerformEventLogOpType_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Get Event Log Entry Command reply structure.
-*/
-
-typedef struct DAC960_V1_EventLogEntry
-{
-  unsigned char MessageType;				/* Byte 0 */
-  unsigned char MessageLength;				/* Byte 1 */
-  unsigned char TargetID:5;				/* Byte 2 Bits 0-4 */
-  unsigned char Channel:3;				/* Byte 2 Bits 5-7 */
-  unsigned char LogicalUnit:6;				/* Byte 3 Bits 0-5 */
-  unsigned char :2;					/* Byte 3 Bits 6-7 */
-  unsigned short SequenceNumber;			/* Bytes 4-5 */
-  unsigned char ErrorCode:7;				/* Byte 6 Bits 0-6 */
-  bool Valid:1;						/* Byte 6 Bit 7 */
-  unsigned char SegmentNumber;				/* Byte 7 */
-  DAC960_SCSI_RequestSenseKey_T SenseKey:4;		/* Byte 8 Bits 0-3 */
-  unsigned char :1;					/* Byte 8 Bit 4 */
-  bool ILI:1;						/* Byte 8 Bit 5 */
-  bool EOM:1;						/* Byte 8 Bit 6 */
-  bool Filemark:1;					/* Byte 8 Bit 7 */
-  unsigned char Information[4];				/* Bytes 9-12 */
-  unsigned char AdditionalSenseLength;			/* Byte 13 */
-  unsigned char CommandSpecificInformation[4];		/* Bytes 14-17 */
-  unsigned char AdditionalSenseCode;			/* Byte 18 */
-  unsigned char AdditionalSenseCodeQualifier;		/* Byte 19 */
-  unsigned char Dummy[12];				/* Bytes 20-31 */
-}
-DAC960_V1_EventLogEntry_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Physical Device State type.
-*/
-
-typedef enum
-{
-    DAC960_V1_Device_Dead =			0x00,
-    DAC960_V1_Device_WriteOnly =		0x02,
-    DAC960_V1_Device_Online =			0x03,
-    DAC960_V1_Device_Standby =			0x10
-}
-__attribute__ ((packed))
-DAC960_V1_PhysicalDeviceState_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Get Device State Command reply structure.
-  The structure is padded by 2 bytes for compatibility with Version 2.xx
-  Firmware.
-*/
-
-typedef struct DAC960_V1_DeviceState
-{
-  bool Present:1;					/* Byte 0 Bit 0 */
-  unsigned char :7;					/* Byte 0 Bits 1-7 */
-  enum {
-    DAC960_V1_OtherType =			0x0,
-    DAC960_V1_DiskType =			0x1,
-    DAC960_V1_SequentialType =			0x2,
-    DAC960_V1_CDROM_or_WORM_Type =		0x3
-    } __attribute__ ((packed)) DeviceType:2;		/* Byte 1 Bits 0-1 */
-  bool :1;						/* Byte 1 Bit 2 */
-  bool Fast20:1;					/* Byte 1 Bit 3 */
-  bool Sync:1;						/* Byte 1 Bit 4 */
-  bool Fast:1;						/* Byte 1 Bit 5 */
-  bool Wide:1;						/* Byte 1 Bit 6 */
-  bool TaggedQueuingSupported:1;			/* Byte 1 Bit 7 */
-  DAC960_V1_PhysicalDeviceState_T DeviceState;		/* Byte 2 */
-  unsigned char :8;					/* Byte 3 */
-  unsigned char SynchronousMultiplier;			/* Byte 4 */
-  unsigned char SynchronousOffset:5;			/* Byte 5 Bits 0-4 */
-  unsigned char :3;					/* Byte 5 Bits 5-7 */
-  unsigned int DiskSize __attribute__ ((packed));	/* Bytes 6-9 */
-  unsigned short :16;					/* Bytes 10-11 */
-}
-DAC960_V1_DeviceState_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Get Rebuild Progress Command reply structure.
-*/
-
-typedef struct DAC960_V1_RebuildProgress
-{
-  unsigned int LogicalDriveNumber;			/* Bytes 0-3 */
-  unsigned int LogicalDriveSize;			/* Bytes 4-7 */
-  unsigned int RemainingBlocks;				/* Bytes 8-11 */
-}
-DAC960_V1_RebuildProgress_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Background Initialization Status Command
-  reply structure.
-*/
-
-typedef struct DAC960_V1_BackgroundInitializationStatus
-{
-  unsigned int LogicalDriveSize;			/* Bytes 0-3 */
-  unsigned int BlocksCompleted;				/* Bytes 4-7 */
-  unsigned char Reserved1[12];				/* Bytes 8-19 */
-  unsigned int LogicalDriveNumber;			/* Bytes 20-23 */
-  unsigned char RAIDLevel;				/* Byte 24 */
-  enum {
-    DAC960_V1_BackgroundInitializationInvalid =	    0x00,
-    DAC960_V1_BackgroundInitializationStarted =	    0x02,
-    DAC960_V1_BackgroundInitializationInProgress =  0x04,
-    DAC960_V1_BackgroundInitializationSuspended =   0x05,
-    DAC960_V1_BackgroundInitializationCancelled =   0x06
-  } __attribute__ ((packed)) Status;			/* Byte 25 */
-  unsigned char Reserved2[6];				/* Bytes 26-31 */
-}
-DAC960_V1_BackgroundInitializationStatus_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Error Table Entry structure.
-*/
-
-typedef struct DAC960_V1_ErrorTableEntry
-{
-  unsigned char ParityErrorCount;			/* Byte 0 */
-  unsigned char SoftErrorCount;				/* Byte 1 */
-  unsigned char HardErrorCount;				/* Byte 2 */
-  unsigned char MiscErrorCount;				/* Byte 3 */
-}
-DAC960_V1_ErrorTableEntry_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Get Error Table Command reply structure.
-*/
-
-typedef struct DAC960_V1_ErrorTable
-{
-  DAC960_V1_ErrorTableEntry_T
-    ErrorTableEntries[DAC960_V1_MaxChannels][DAC960_V1_MaxTargets];
-}
-DAC960_V1_ErrorTable_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Read Config2 Command reply structure.
-*/
-
-typedef struct DAC960_V1_Config2
-{
-  unsigned char :1;					/* Byte 0 Bit 0 */
-  bool ActiveNegationEnabled:1;				/* Byte 0 Bit 1 */
-  unsigned char :5;					/* Byte 0 Bits 2-6 */
-  bool NoRescanIfResetReceivedDuringScan:1;		/* Byte 0 Bit 7 */
-  bool StorageWorksSupportEnabled:1;			/* Byte 1 Bit 0 */
-  bool HewlettPackardSupportEnabled:1;			/* Byte 1 Bit 1 */
-  bool NoDisconnectOnFirstCommand:1;			/* Byte 1 Bit 2 */
-  unsigned char :2;					/* Byte 1 Bits 3-4 */
-  bool AEMI_ARM:1;					/* Byte 1 Bit 5 */
-  bool AEMI_OFM:1;					/* Byte 1 Bit 6 */
-  unsigned char :1;					/* Byte 1 Bit 7 */
-  enum {
-    DAC960_V1_OEMID_Mylex =			0x00,
-    DAC960_V1_OEMID_IBM =			0x08,
-    DAC960_V1_OEMID_HP =			0x0A,
-    DAC960_V1_OEMID_DEC =			0x0C,
-    DAC960_V1_OEMID_Siemens =			0x10,
-    DAC960_V1_OEMID_Intel =			0x12
-  } __attribute__ ((packed)) OEMID;			/* Byte 2 */
-  unsigned char OEMModelNumber;				/* Byte 3 */
-  unsigned char PhysicalSector;				/* Byte 4 */
-  unsigned char LogicalSector;				/* Byte 5 */
-  unsigned char BlockFactor;				/* Byte 6 */
-  bool ReadAheadEnabled:1;				/* Byte 7 Bit 0 */
-  bool LowBIOSDelay:1;					/* Byte 7 Bit 1 */
-  unsigned char :2;					/* Byte 7 Bits 2-3 */
-  bool ReassignRestrictedToOneSector:1;			/* Byte 7 Bit 4 */
-  unsigned char :1;					/* Byte 7 Bit 5 */
-  bool ForceUnitAccessDuringWriteRecovery:1;		/* Byte 7 Bit 6 */
-  bool EnableLeftSymmetricRAID5Algorithm:1;		/* Byte 7 Bit 7 */
-  unsigned char DefaultRebuildRate;			/* Byte 8 */
-  unsigned char :8;					/* Byte 9 */
-  unsigned char BlocksPerCacheLine;			/* Byte 10 */
-  unsigned char BlocksPerStripe;			/* Byte 11 */
-  struct {
-    enum {
-      DAC960_V1_Async =				0x0,
-      DAC960_V1_Sync_8MHz =			0x1,
-      DAC960_V1_Sync_5MHz =			0x2,
-      DAC960_V1_Sync_10or20MHz =		0x3	/* Byte 11 Bits 0-1 */
-    } __attribute__ ((packed)) Speed:2;
-    bool Force8Bit:1;					/* Byte 11 Bit 2 */
-    bool DisableFast20:1;				/* Byte 11 Bit 3 */
-    unsigned char :3;					/* Byte 11 Bits 4-6 */
-    bool EnableTaggedQueuing:1;				/* Byte 11 Bit 7 */
-  } __attribute__ ((packed)) ChannelParameters[6];	/* Bytes 12-17 */
-  unsigned char SCSIInitiatorID;			/* Byte 18 */
-  unsigned char :8;					/* Byte 19 */
-  enum {
-    DAC960_V1_StartupMode_ControllerSpinUp =	0x00,
-    DAC960_V1_StartupMode_PowerOnSpinUp =	0x01
-  } __attribute__ ((packed)) StartupMode;		/* Byte 20 */
-  unsigned char SimultaneousDeviceSpinUpCount;		/* Byte 21 */
-  unsigned char SecondsDelayBetweenSpinUps;		/* Byte 22 */
-  unsigned char Reserved1[29];				/* Bytes 23-51 */
-  bool BIOSDisabled:1;					/* Byte 52 Bit 0 */
-  bool CDROMBootEnabled:1;				/* Byte 52 Bit 1 */
-  unsigned char :3;					/* Byte 52 Bits 2-4 */
-  enum {
-    DAC960_V1_Geometry_128_32 =			0x0,
-    DAC960_V1_Geometry_255_63 =			0x1,
-    DAC960_V1_Geometry_Reserved1 =		0x2,
-    DAC960_V1_Geometry_Reserved2 =		0x3
-  } __attribute__ ((packed)) DriveGeometry:2;		/* Byte 52 Bits 5-6 */
-  unsigned char :1;					/* Byte 52 Bit 7 */
-  unsigned char Reserved2[9];				/* Bytes 53-61 */
-  unsigned short Checksum;				/* Bytes 62-63 */
-}
-DAC960_V1_Config2_T;
-
-
-/*
-  Define the DAC960 V1 Firmware DCDB request structure.
-*/
-
-typedef struct DAC960_V1_DCDB
-{
-  unsigned char TargetID:4;				 /* Byte 0 Bits 0-3 */
-  unsigned char Channel:4;				 /* Byte 0 Bits 4-7 */
-  enum {
-    DAC960_V1_DCDB_NoDataTransfer =		0,
-    DAC960_V1_DCDB_DataTransferDeviceToSystem = 1,
-    DAC960_V1_DCDB_DataTransferSystemToDevice = 2,
-    DAC960_V1_DCDB_IllegalDataTransfer =	3
-  } __attribute__ ((packed)) Direction:2;		 /* Byte 1 Bits 0-1 */
-  bool EarlyStatus:1;					 /* Byte 1 Bit 2 */
-  unsigned char :1;					 /* Byte 1 Bit 3 */
-  enum {
-    DAC960_V1_DCDB_Timeout_24_hours =		0,
-    DAC960_V1_DCDB_Timeout_10_seconds =		1,
-    DAC960_V1_DCDB_Timeout_60_seconds =		2,
-    DAC960_V1_DCDB_Timeout_10_minutes =		3
-  } __attribute__ ((packed)) Timeout:2;			 /* Byte 1 Bits 4-5 */
-  bool NoAutomaticRequestSense:1;			 /* Byte 1 Bit 6 */
-  bool DisconnectPermitted:1;				 /* Byte 1 Bit 7 */
-  unsigned short TransferLength;			 /* Bytes 2-3 */
-  DAC960_BusAddress32_T BusAddress;			 /* Bytes 4-7 */
-  unsigned char CDBLength:4;				 /* Byte 8 Bits 0-3 */
-  unsigned char TransferLengthHigh4:4;			 /* Byte 8 Bits 4-7 */
-  unsigned char SenseLength;				 /* Byte 9 */
-  unsigned char CDB[12];				 /* Bytes 10-21 */
-  unsigned char SenseData[64];				 /* Bytes 22-85 */
-  unsigned char Status;					 /* Byte 86 */
-  unsigned char :8;					 /* Byte 87 */
-}
-DAC960_V1_DCDB_T;
-
-
-/*
-  Define the DAC960 V1 Firmware Scatter/Gather List Type 1 32 Bit Address
-  32 Bit Byte Count structure.
-*/
-
-typedef struct DAC960_V1_ScatterGatherSegment
-{
-  DAC960_BusAddress32_T SegmentDataPointer;		/* Bytes 0-3 */
-  DAC960_ByteCount32_T SegmentByteCount;		/* Bytes 4-7 */
-}
-DAC960_V1_ScatterGatherSegment_T;
-
-
-/*
-  Define the 13 Byte DAC960 V1 Firmware Command Mailbox structure.  Bytes 13-15
-  are not used.  The Command Mailbox structure is padded to 16 bytes for
-  efficient access.
-*/
-
-typedef union DAC960_V1_CommandMailbox
-{
-  unsigned int Words[4];				/* Words 0-3 */
-  unsigned char Bytes[16];				/* Bytes 0-15 */
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    unsigned char Dummy[14];				/* Bytes 2-15 */
-  } __attribute__ ((packed)) Common;
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    unsigned char Dummy1[6];				/* Bytes 2-7 */
-    DAC960_BusAddress32_T BusAddress;			/* Bytes 8-11 */
-    unsigned char Dummy2[4];				/* Bytes 12-15 */
-  } __attribute__ ((packed)) Type3;
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    unsigned char CommandOpcode2;			/* Byte 2 */
-    unsigned char Dummy1[5];				/* Bytes 3-7 */
-    DAC960_BusAddress32_T BusAddress;			/* Bytes 8-11 */
-    unsigned char Dummy2[4];				/* Bytes 12-15 */
-  } __attribute__ ((packed)) Type3B;
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    unsigned char Dummy1[5];				/* Bytes 2-6 */
-    unsigned char LogicalDriveNumber:6;			/* Byte 7 Bits 0-6 */
-    bool AutoRestore:1;					/* Byte 7 Bit 7 */
-    unsigned char Dummy2[8];				/* Bytes 8-15 */
-  } __attribute__ ((packed)) Type3C;
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    unsigned char Channel;				/* Byte 2 */
-    unsigned char TargetID;				/* Byte 3 */
-    DAC960_V1_PhysicalDeviceState_T DeviceState:5;	/* Byte 4 Bits 0-4 */
-    unsigned char Modifier:3;				/* Byte 4 Bits 5-7 */
-    unsigned char Dummy1[3];				/* Bytes 5-7 */
-    DAC960_BusAddress32_T BusAddress;			/* Bytes 8-11 */
-    unsigned char Dummy2[4];				/* Bytes 12-15 */
-  } __attribute__ ((packed)) Type3D;
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    DAC960_V1_PerformEventLogOpType_T OperationType;	/* Byte 2 */
-    unsigned char OperationQualifier;			/* Byte 3 */
-    unsigned short SequenceNumber;			/* Bytes 4-5 */
-    unsigned char Dummy1[2];				/* Bytes 6-7 */
-    DAC960_BusAddress32_T BusAddress;			/* Bytes 8-11 */
-    unsigned char Dummy2[4];				/* Bytes 12-15 */
-  } __attribute__ ((packed)) Type3E;
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    unsigned char Dummy1[2];				/* Bytes 2-3 */
-    unsigned char RebuildRateConstant;			/* Byte 4 */
-    unsigned char Dummy2[3];				/* Bytes 5-7 */
-    DAC960_BusAddress32_T BusAddress;			/* Bytes 8-11 */
-    unsigned char Dummy3[4];				/* Bytes 12-15 */
-  } __attribute__ ((packed)) Type3R;
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    unsigned short TransferLength;			/* Bytes 2-3 */
-    unsigned int LogicalBlockAddress;			/* Bytes 4-7 */
-    DAC960_BusAddress32_T BusAddress;			/* Bytes 8-11 */
-    unsigned char LogicalDriveNumber;			/* Byte 12 */
-    unsigned char Dummy[3];				/* Bytes 13-15 */
-  } __attribute__ ((packed)) Type4;
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    struct {
-      unsigned short TransferLength:11;			/* Bytes 2-3 */
-      unsigned char LogicalDriveNumber:5;		/* Byte 3 Bits 3-7 */
-    } __attribute__ ((packed)) LD;
-    unsigned int LogicalBlockAddress;			/* Bytes 4-7 */
-    DAC960_BusAddress32_T BusAddress;			/* Bytes 8-11 */
-    unsigned char ScatterGatherCount:6;			/* Byte 12 Bits 0-5 */
-    enum {
-      DAC960_V1_ScatterGather_32BitAddress_32BitByteCount = 0x0,
-      DAC960_V1_ScatterGather_32BitAddress_16BitByteCount = 0x1,
-      DAC960_V1_ScatterGather_32BitByteCount_32BitAddress = 0x2,
-      DAC960_V1_ScatterGather_16BitByteCount_32BitAddress = 0x3
-    } __attribute__ ((packed)) ScatterGatherType:2;	/* Byte 12 Bits 6-7 */
-    unsigned char Dummy[3];				/* Bytes 13-15 */
-  } __attribute__ ((packed)) Type5;
-  struct {
-    DAC960_V1_CommandOpcode_T CommandOpcode;		/* Byte 0 */
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 1 */
-    unsigned char CommandOpcode2;			/* Byte 2 */
-    unsigned char :8;					/* Byte 3 */
-    DAC960_BusAddress32_T CommandMailboxesBusAddress;	/* Bytes 4-7 */
-    DAC960_BusAddress32_T StatusMailboxesBusAddress;	/* Bytes 8-11 */
-    unsigned char Dummy[4];				/* Bytes 12-15 */
-  } __attribute__ ((packed)) TypeX;
-}
-DAC960_V1_CommandMailbox_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Command Opcodes.
-*/
-
-typedef enum
-{
-  DAC960_V2_MemCopy =				0x01,
-  DAC960_V2_SCSI_10_Passthru =			0x02,
-  DAC960_V2_SCSI_255_Passthru =			0x03,
-  DAC960_V2_SCSI_10 =				0x04,
-  DAC960_V2_SCSI_256 =				0x05,
-  DAC960_V2_IOCTL =				0x20
-}
-__attribute__ ((packed))
-DAC960_V2_CommandOpcode_T;
-
-
-/*
-  Define the DAC960 V2 Firmware IOCTL Opcodes.
-*/
-
-typedef enum
-{
-  DAC960_V2_GetControllerInfo =			0x01,
-  DAC960_V2_GetLogicalDeviceInfoValid =		0x03,
-  DAC960_V2_GetPhysicalDeviceInfoValid =	0x05,
-  DAC960_V2_GetHealthStatus =			0x11,
-  DAC960_V2_GetEvent =				0x15,
-  DAC960_V2_StartDiscovery =			0x81,
-  DAC960_V2_SetDeviceState =			0x82,
-  DAC960_V2_RebuildDeviceStart =		0x88,
-  DAC960_V2_RebuildDeviceStop =			0x89,
-  DAC960_V2_ConsistencyCheckStart =		0x8C,
-  DAC960_V2_ConsistencyCheckStop =		0x8D,
-  DAC960_V2_SetMemoryMailbox =			0x8E,
-  DAC960_V2_PauseDevice =			0x92,
-  DAC960_V2_TranslatePhysicalToLogicalDevice =	0xC5
-}
-__attribute__ ((packed))
-DAC960_V2_IOCTL_Opcode_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Command Identifier type.
-*/
-
-typedef unsigned short DAC960_V2_CommandIdentifier_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Command Status Codes.
-*/
-
-#define DAC960_V2_NormalCompletion		0x00
-#define DAC960_V2_AbormalCompletion		0x02
-#define DAC960_V2_DeviceBusy			0x08
-#define DAC960_V2_DeviceNonresponsive		0x0E
-#define DAC960_V2_DeviceNonresponsive2		0x0F
-#define DAC960_V2_DeviceRevervationConflict	0x18
-
-typedef unsigned char DAC960_V2_CommandStatus_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Memory Type structure.
-*/
-
-typedef struct DAC960_V2_MemoryType
-{
-  enum {
-    DAC960_V2_MemoryType_Reserved =		0x00,
-    DAC960_V2_MemoryType_DRAM =			0x01,
-    DAC960_V2_MemoryType_EDRAM =		0x02,
-    DAC960_V2_MemoryType_EDO =			0x03,
-    DAC960_V2_MemoryType_SDRAM =		0x04,
-    DAC960_V2_MemoryType_Last =			0x1F
-  } __attribute__ ((packed)) MemoryType:5;		/* Byte 0 Bits 0-4 */
-  bool :1;						/* Byte 0 Bit 5 */
-  bool MemoryParity:1;					/* Byte 0 Bit 6 */
-  bool MemoryECC:1;					/* Byte 0 Bit 7 */
-}
-DAC960_V2_MemoryType_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Processor Type structure.
-*/
-
-typedef enum
-{
-  DAC960_V2_ProcessorType_i960CA =		0x01,
-  DAC960_V2_ProcessorType_i960RD =		0x02,
-  DAC960_V2_ProcessorType_i960RN =		0x03,
-  DAC960_V2_ProcessorType_i960RP =		0x04,
-  DAC960_V2_ProcessorType_NorthBay =		0x05,
-  DAC960_V2_ProcessorType_StrongArm =		0x06,
-  DAC960_V2_ProcessorType_i960RM =		0x07
-}
-__attribute__ ((packed))
-DAC960_V2_ProcessorType_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Get Controller Info reply structure.
-*/
-
-typedef struct DAC960_V2_ControllerInfo
-{
-  unsigned char :8;					/* Byte 0 */
-  enum {
-    DAC960_V2_SCSI_Bus =			0x00,
-    DAC960_V2_Fibre_Bus =			0x01,
-    DAC960_V2_PCI_Bus =				0x03
-  } __attribute__ ((packed)) BusInterfaceType;		/* Byte 1 */
-  enum {
-    DAC960_V2_DAC960E =				0x01,
-    DAC960_V2_DAC960M =				0x08,
-    DAC960_V2_DAC960PD =			0x10,
-    DAC960_V2_DAC960PL =			0x11,
-    DAC960_V2_DAC960PU =			0x12,
-    DAC960_V2_DAC960PE =			0x13,
-    DAC960_V2_DAC960PG =			0x14,
-    DAC960_V2_DAC960PJ =			0x15,
-    DAC960_V2_DAC960PTL0 =			0x16,
-    DAC960_V2_DAC960PR =			0x17,
-    DAC960_V2_DAC960PRL =			0x18,
-    DAC960_V2_DAC960PT =			0x19,
-    DAC960_V2_DAC1164P =			0x1A,
-    DAC960_V2_DAC960PTL1 =			0x1B,
-    DAC960_V2_EXR2000P =			0x1C,
-    DAC960_V2_EXR3000P =			0x1D,
-    DAC960_V2_AcceleRAID352 =			0x1E,
-    DAC960_V2_AcceleRAID170 =			0x1F,
-    DAC960_V2_AcceleRAID160 =			0x20,
-    DAC960_V2_DAC960S =				0x60,
-    DAC960_V2_DAC960SU =			0x61,
-    DAC960_V2_DAC960SX =			0x62,
-    DAC960_V2_DAC960SF =			0x63,
-    DAC960_V2_DAC960SS =			0x64,
-    DAC960_V2_DAC960FL =			0x65,
-    DAC960_V2_DAC960LL =			0x66,
-    DAC960_V2_DAC960FF =			0x67,
-    DAC960_V2_DAC960HP =			0x68,
-    DAC960_V2_RAIDBRICK =			0x69,
-    DAC960_V2_METEOR_FL =			0x6A,
-    DAC960_V2_METEOR_FF =			0x6B
-  } __attribute__ ((packed)) ControllerType;		/* Byte 2 */
-  unsigned char :8;					/* Byte 3 */
-  unsigned short BusInterfaceSpeedMHz;			/* Bytes 4-5 */
-  unsigned char BusWidthBits;				/* Byte 6 */
-  unsigned char FlashCodeTypeOrProductID;		/* Byte 7 */
-  unsigned char NumberOfHostPortsPresent;		/* Byte 8 */
-  unsigned char Reserved1[7];				/* Bytes 9-15 */
-  unsigned char BusInterfaceName[16];			/* Bytes 16-31 */
-  unsigned char ControllerName[16];			/* Bytes 32-47 */
-  unsigned char Reserved2[16];				/* Bytes 48-63 */
-  /* Firmware Release Information */
-  unsigned char FirmwareMajorVersion;			/* Byte 64 */
-  unsigned char FirmwareMinorVersion;			/* Byte 65 */
-  unsigned char FirmwareTurnNumber;			/* Byte 66 */
-  unsigned char FirmwareBuildNumber;			/* Byte 67 */
-  unsigned char FirmwareReleaseDay;			/* Byte 68 */
-  unsigned char FirmwareReleaseMonth;			/* Byte 69 */
-  unsigned char FirmwareReleaseYearHigh2Digits;		/* Byte 70 */
-  unsigned char FirmwareReleaseYearLow2Digits;		/* Byte 71 */
-  /* Hardware Release Information */
-  unsigned char HardwareRevision;			/* Byte 72 */
-  unsigned int :24;					/* Bytes 73-75 */
-  unsigned char HardwareReleaseDay;			/* Byte 76 */
-  unsigned char HardwareReleaseMonth;			/* Byte 77 */
-  unsigned char HardwareReleaseYearHigh2Digits;		/* Byte 78 */
-  unsigned char HardwareReleaseYearLow2Digits;		/* Byte 79 */
-  /* Hardware Manufacturing Information */
-  unsigned char ManufacturingBatchNumber;		/* Byte 80 */
-  unsigned char :8;					/* Byte 81 */
-  unsigned char ManufacturingPlantNumber;		/* Byte 82 */
-  unsigned char :8;					/* Byte 83 */
-  unsigned char HardwareManufacturingDay;		/* Byte 84 */
-  unsigned char HardwareManufacturingMonth;		/* Byte 85 */
-  unsigned char HardwareManufacturingYearHigh2Digits;	/* Byte 86 */
-  unsigned char HardwareManufacturingYearLow2Digits;	/* Byte 87 */
-  unsigned char MaximumNumberOfPDDperXLD;		/* Byte 88 */
-  unsigned char MaximumNumberOfILDperXLD;		/* Byte 89 */
-  unsigned short NonvolatileMemorySizeKB;		/* Bytes 90-91 */
-  unsigned char MaximumNumberOfXLD;			/* Byte 92 */
-  unsigned int :24;					/* Bytes 93-95 */
-  /* Unique Information per Controller */
-  unsigned char ControllerSerialNumber[16];		/* Bytes 96-111 */
-  unsigned char Reserved3[16];				/* Bytes 112-127 */
-  /* Vendor Information */
-  unsigned int :24;					/* Bytes 128-130 */
-  unsigned char OEM_Code;				/* Byte 131 */
-  unsigned char VendorName[16];				/* Bytes 132-147 */
-  /* Other Physical/Controller/Operation Information */
-  bool BBU_Present:1;					/* Byte 148 Bit 0 */
-  bool ActiveActiveClusteringMode:1;			/* Byte 148 Bit 1 */
-  unsigned char :6;					/* Byte 148 Bits 2-7 */
-  unsigned char :8;					/* Byte 149 */
-  unsigned short :16;					/* Bytes 150-151 */
-  /* Physical Device Scan Information */
-  bool PhysicalScanActive:1;				/* Byte 152 Bit 0 */
-  unsigned char :7;					/* Byte 152 Bits 1-7 */
-  unsigned char PhysicalDeviceChannelNumber;		/* Byte 153 */
-  unsigned char PhysicalDeviceTargetID;			/* Byte 154 */
-  unsigned char PhysicalDeviceLogicalUnit;		/* Byte 155 */
-  /* Maximum Command Data Transfer Sizes */
-  unsigned short MaximumDataTransferSizeInBlocks;	/* Bytes 156-157 */
-  unsigned short MaximumScatterGatherEntries;		/* Bytes 158-159 */
-  /* Logical/Physical Device Counts */
-  unsigned short LogicalDevicesPresent;			/* Bytes 160-161 */
-  unsigned short LogicalDevicesCritical;		/* Bytes 162-163 */
-  unsigned short LogicalDevicesOffline;			/* Bytes 164-165 */
-  unsigned short PhysicalDevicesPresent;		/* Bytes 166-167 */
-  unsigned short PhysicalDisksPresent;			/* Bytes 168-169 */
-  unsigned short PhysicalDisksCritical;			/* Bytes 170-171 */
-  unsigned short PhysicalDisksOffline;			/* Bytes 172-173 */
-  unsigned short MaximumParallelCommands;		/* Bytes 174-175 */
-  /* Channel and Target ID Information */
-  unsigned char NumberOfPhysicalChannelsPresent;	/* Byte 176 */
-  unsigned char NumberOfVirtualChannelsPresent;		/* Byte 177 */
-  unsigned char NumberOfPhysicalChannelsPossible;	/* Byte 178 */
-  unsigned char NumberOfVirtualChannelsPossible;	/* Byte 179 */
-  unsigned char MaximumTargetsPerChannel[16];		/* Bytes 180-195 */
-  unsigned char Reserved4[12];				/* Bytes 196-207 */
-  /* Memory/Cache Information */
-  unsigned short MemorySizeMB;				/* Bytes 208-209 */
-  unsigned short CacheSizeMB;				/* Bytes 210-211 */
-  unsigned int ValidCacheSizeInBytes;			/* Bytes 212-215 */
-  unsigned int DirtyCacheSizeInBytes;			/* Bytes 216-219 */
-  unsigned short MemorySpeedMHz;			/* Bytes 220-221 */
-  unsigned char MemoryDataWidthBits;			/* Byte 222 */
-  DAC960_V2_MemoryType_T MemoryType;			/* Byte 223 */
-  unsigned char CacheMemoryTypeName[16];		/* Bytes 224-239 */
-  /* Execution Memory Information */
-  unsigned short ExecutionMemorySizeMB;			/* Bytes 240-241 */
-  unsigned short ExecutionL2CacheSizeMB;		/* Bytes 242-243 */
-  unsigned char Reserved5[8];				/* Bytes 244-251 */
-  unsigned short ExecutionMemorySpeedMHz;		/* Bytes 252-253 */
-  unsigned char ExecutionMemoryDataWidthBits;		/* Byte 254 */
-  DAC960_V2_MemoryType_T ExecutionMemoryType;		/* Byte 255 */
-  unsigned char ExecutionMemoryTypeName[16];		/* Bytes 256-271 */
-  /* First CPU Type Information */
-  unsigned short FirstProcessorSpeedMHz;		/* Bytes 272-273 */
-  DAC960_V2_ProcessorType_T FirstProcessorType;		/* Byte 274 */
-  unsigned char FirstProcessorCount;			/* Byte 275 */
-  unsigned char Reserved6[12];				/* Bytes 276-287 */
-  unsigned char FirstProcessorName[16];			/* Bytes 288-303 */
-  /* Second CPU Type Information */
-  unsigned short SecondProcessorSpeedMHz;		/* Bytes 304-305 */
-  DAC960_V2_ProcessorType_T SecondProcessorType;	/* Byte 306 */
-  unsigned char SecondProcessorCount;			/* Byte 307 */
-  unsigned char Reserved7[12];				/* Bytes 308-319 */
-  unsigned char SecondProcessorName[16];		/* Bytes 320-335 */
-  /* Debugging/Profiling/Command Time Tracing Information */
-  unsigned short CurrentProfilingDataPageNumber;	/* Bytes 336-337 */
-  unsigned short ProgramsAwaitingProfilingData;		/* Bytes 338-339 */
-  unsigned short CurrentCommandTimeTraceDataPageNumber;	/* Bytes 340-341 */
-  unsigned short ProgramsAwaitingCommandTimeTraceData;	/* Bytes 342-343 */
-  unsigned char Reserved8[8];				/* Bytes 344-351 */
-  /* Error Counters on Physical Devices */
-  unsigned short PhysicalDeviceBusResets;		/* Bytes 352-353 */
-  unsigned short PhysicalDeviceParityErrors;		/* Bytes 355-355 */
-  unsigned short PhysicalDeviceSoftErrors;		/* Bytes 356-357 */
-  unsigned short PhysicalDeviceCommandsFailed;		/* Bytes 358-359 */
-  unsigned short PhysicalDeviceMiscellaneousErrors;	/* Bytes 360-361 */
-  unsigned short PhysicalDeviceCommandTimeouts;		/* Bytes 362-363 */
-  unsigned short PhysicalDeviceSelectionTimeouts;	/* Bytes 364-365 */
-  unsigned short PhysicalDeviceRetriesDone;		/* Bytes 366-367 */
-  unsigned short PhysicalDeviceAbortsDone;		/* Bytes 368-369 */
-  unsigned short PhysicalDeviceHostCommandAbortsDone;	/* Bytes 370-371 */
-  unsigned short PhysicalDevicePredictedFailuresDetected; /* Bytes 372-373 */
-  unsigned short PhysicalDeviceHostCommandsFailed;	/* Bytes 374-375 */
-  unsigned short PhysicalDeviceHardErrors;		/* Bytes 376-377 */
-  unsigned char Reserved9[6];				/* Bytes 378-383 */
-  /* Error Counters on Logical Devices */
-  unsigned short LogicalDeviceSoftErrors;		/* Bytes 384-385 */
-  unsigned short LogicalDeviceCommandsFailed;		/* Bytes 386-387 */
-  unsigned short LogicalDeviceHostCommandAbortsDone;	/* Bytes 388-389 */
-  unsigned short :16;					/* Bytes 390-391 */
-  /* Error Counters on Controller */
-  unsigned short ControllerMemoryErrors;		/* Bytes 392-393 */
-  unsigned short ControllerHostCommandAbortsDone;	/* Bytes 394-395 */
-  unsigned int :32;					/* Bytes 396-399 */
-  /* Long Duration Activity Information */
-  unsigned short BackgroundInitializationsActive;	/* Bytes 400-401 */
-  unsigned short LogicalDeviceInitializationsActive;	/* Bytes 402-403 */
-  unsigned short PhysicalDeviceInitializationsActive;	/* Bytes 404-405 */
-  unsigned short ConsistencyChecksActive;		/* Bytes 406-407 */
-  unsigned short RebuildsActive;			/* Bytes 408-409 */
-  unsigned short OnlineExpansionsActive;		/* Bytes 410-411 */
-  unsigned short PatrolActivitiesActive;		/* Bytes 412-413 */
-  unsigned short :16;					/* Bytes 414-415 */
-  /* Flash ROM Information */
-  unsigned char FlashType;				/* Byte 416 */
-  unsigned char :8;					/* Byte 417 */
-  unsigned short FlashSizeMB;				/* Bytes 418-419 */
-  unsigned int FlashLimit;				/* Bytes 420-423 */
-  unsigned int FlashCount;				/* Bytes 424-427 */
-  unsigned int :32;					/* Bytes 428-431 */
-  unsigned char FlashTypeName[16];			/* Bytes 432-447 */
-  /* Firmware Run Time Information */
-  unsigned char RebuildRate;				/* Byte 448 */
-  unsigned char BackgroundInitializationRate;		/* Byte 449 */
-  unsigned char ForegroundInitializationRate;		/* Byte 450 */
-  unsigned char ConsistencyCheckRate;			/* Byte 451 */
-  unsigned int :32;					/* Bytes 452-455 */
-  unsigned int MaximumDP;				/* Bytes 456-459 */
-  unsigned int FreeDP;					/* Bytes 460-463 */
-  unsigned int MaximumIOP;				/* Bytes 464-467 */
-  unsigned int FreeIOP;					/* Bytes 468-471 */
-  unsigned short MaximumCombLengthInBlocks;		/* Bytes 472-473 */
-  unsigned short NumberOfConfigurationGroups;		/* Bytes 474-475 */
-  bool InstallationAbortStatus:1;			/* Byte 476 Bit 0 */
-  bool MaintenanceModeStatus:1;				/* Byte 476 Bit 1 */
-  unsigned int :24;					/* Bytes 476-479 */
-  unsigned char Reserved10[32];				/* Bytes 480-511 */
-  unsigned char Reserved11[512];			/* Bytes 512-1023 */
-}
-DAC960_V2_ControllerInfo_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Logical Device State type.
-*/
-
-typedef enum
-{
-  DAC960_V2_LogicalDevice_Online =		0x01,
-  DAC960_V2_LogicalDevice_Offline =		0x08,
-  DAC960_V2_LogicalDevice_Critical =		0x09
-}
-__attribute__ ((packed))
-DAC960_V2_LogicalDeviceState_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Get Logical Device Info reply structure.
-*/
-
-typedef struct DAC960_V2_LogicalDeviceInfo
-{
-  unsigned char :8;					/* Byte 0 */
-  unsigned char Channel;				/* Byte 1 */
-  unsigned char TargetID;				/* Byte 2 */
-  unsigned char LogicalUnit;				/* Byte 3 */
-  DAC960_V2_LogicalDeviceState_T LogicalDeviceState;	/* Byte 4 */
-  unsigned char RAIDLevel;				/* Byte 5 */
-  unsigned char StripeSize;				/* Byte 6 */
-  unsigned char CacheLineSize;				/* Byte 7 */
-  struct {
-    enum {
-      DAC960_V2_ReadCacheDisabled =		0x0,
-      DAC960_V2_ReadCacheEnabled =		0x1,
-      DAC960_V2_ReadAheadEnabled =		0x2,
-      DAC960_V2_IntelligentReadAheadEnabled =	0x3,
-      DAC960_V2_ReadCache_Last =		0x7
-    } __attribute__ ((packed)) ReadCache:3;		/* Byte 8 Bits 0-2 */
-    enum {
-      DAC960_V2_WriteCacheDisabled =		0x0,
-      DAC960_V2_LogicalDeviceReadOnly =		0x1,
-      DAC960_V2_WriteCacheEnabled =		0x2,
-      DAC960_V2_IntelligentWriteCacheEnabled =	0x3,
-      DAC960_V2_WriteCache_Last =		0x7
-    } __attribute__ ((packed)) WriteCache:3;		/* Byte 8 Bits 3-5 */
-    bool :1;						/* Byte 8 Bit 6 */
-    bool LogicalDeviceInitialized:1;			/* Byte 8 Bit 7 */
-  } LogicalDeviceControl;				/* Byte 8 */
-  /* Logical Device Operations Status */
-  bool ConsistencyCheckInProgress:1;			/* Byte 9 Bit 0 */
-  bool RebuildInProgress:1;				/* Byte 9 Bit 1 */
-  bool BackgroundInitializationInProgress:1;		/* Byte 9 Bit 2 */
-  bool ForegroundInitializationInProgress:1;		/* Byte 9 Bit 3 */
-  bool DataMigrationInProgress:1;			/* Byte 9 Bit 4 */
-  bool PatrolOperationInProgress:1;			/* Byte 9 Bit 5 */
-  unsigned char :2;					/* Byte 9 Bits 6-7 */
-  unsigned char RAID5WriteUpdate;			/* Byte 10 */
-  unsigned char RAID5Algorithm;				/* Byte 11 */
-  unsigned short LogicalDeviceNumber;			/* Bytes 12-13 */
-  /* BIOS Info */
-  bool BIOSDisabled:1;					/* Byte 14 Bit 0 */
-  bool CDROMBootEnabled:1;				/* Byte 14 Bit 1 */
-  bool DriveCoercionEnabled:1;				/* Byte 14 Bit 2 */
-  bool WriteSameDisabled:1;				/* Byte 14 Bit 3 */
-  bool HBA_ModeEnabled:1;				/* Byte 14 Bit 4 */
-  enum {
-    DAC960_V2_Geometry_128_32 =			0x0,
-    DAC960_V2_Geometry_255_63 =			0x1,
-    DAC960_V2_Geometry_Reserved1 =		0x2,
-    DAC960_V2_Geometry_Reserved2 =		0x3
-  } __attribute__ ((packed)) DriveGeometry:2;		/* Byte 14 Bits 5-6 */
-  bool SuperReadAheadEnabled:1;				/* Byte 14 Bit 7 */
-  unsigned char :8;					/* Byte 15 */
-  /* Error Counters */
-  unsigned short SoftErrors;				/* Bytes 16-17 */
-  unsigned short CommandsFailed;			/* Bytes 18-19 */
-  unsigned short HostCommandAbortsDone;			/* Bytes 20-21 */
-  unsigned short DeferredWriteErrors;			/* Bytes 22-23 */
-  unsigned int :32;					/* Bytes 24-27 */
-  unsigned int :32;					/* Bytes 28-31 */
-  /* Device Size Information */
-  unsigned short :16;					/* Bytes 32-33 */
-  unsigned short DeviceBlockSizeInBytes;		/* Bytes 34-35 */
-  unsigned int OriginalDeviceSize;			/* Bytes 36-39 */
-  unsigned int ConfigurableDeviceSize;			/* Bytes 40-43 */
-  unsigned int :32;					/* Bytes 44-47 */
-  unsigned char LogicalDeviceName[32];			/* Bytes 48-79 */
-  unsigned char SCSI_InquiryData[36];			/* Bytes 80-115 */
-  unsigned char Reserved1[12];				/* Bytes 116-127 */
-  DAC960_ByteCount64_T LastReadBlockNumber;		/* Bytes 128-135 */
-  DAC960_ByteCount64_T LastWrittenBlockNumber;		/* Bytes 136-143 */
-  DAC960_ByteCount64_T ConsistencyCheckBlockNumber;	/* Bytes 144-151 */
-  DAC960_ByteCount64_T RebuildBlockNumber;		/* Bytes 152-159 */
-  DAC960_ByteCount64_T BackgroundInitializationBlockNumber; /* Bytes 160-167 */
-  DAC960_ByteCount64_T ForegroundInitializationBlockNumber; /* Bytes 168-175 */
-  DAC960_ByteCount64_T DataMigrationBlockNumber;	/* Bytes 176-183 */
-  DAC960_ByteCount64_T PatrolOperationBlockNumber;	/* Bytes 184-191 */
-  unsigned char Reserved2[64];				/* Bytes 192-255 */
-}
-DAC960_V2_LogicalDeviceInfo_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Physical Device State type.
-*/
-
-typedef enum
-{
-    DAC960_V2_Device_Unconfigured =		0x00,
-    DAC960_V2_Device_Online =			0x01,
-    DAC960_V2_Device_Rebuild =			0x03,
-    DAC960_V2_Device_Missing =			0x04,
-    DAC960_V2_Device_Critical =			0x05,
-    DAC960_V2_Device_Dead =			0x08,
-    DAC960_V2_Device_SuspectedDead =		0x0C,
-    DAC960_V2_Device_CommandedOffline =		0x10,
-    DAC960_V2_Device_Standby =			0x21,
-    DAC960_V2_Device_InvalidState =		0xFF
-}
-__attribute__ ((packed))
-DAC960_V2_PhysicalDeviceState_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Get Physical Device Info reply structure.
-*/
-
-typedef struct DAC960_V2_PhysicalDeviceInfo
-{
-  unsigned char :8;					/* Byte 0 */
-  unsigned char Channel;				/* Byte 1 */
-  unsigned char TargetID;				/* Byte 2 */
-  unsigned char LogicalUnit;				/* Byte 3 */
-  /* Configuration Status Bits */
-  bool PhysicalDeviceFaultTolerant:1;			/* Byte 4 Bit 0 */
-  bool PhysicalDeviceConnected:1;			/* Byte 4 Bit 1 */
-  bool PhysicalDeviceLocalToController:1;		/* Byte 4 Bit 2 */
-  unsigned char :5;					/* Byte 4 Bits 3-7 */
-  /* Multiple Host/Controller Status Bits */
-  bool RemoteHostSystemDead:1;				/* Byte 5 Bit 0 */
-  bool RemoteControllerDead:1;				/* Byte 5 Bit 1 */
-  unsigned char :6;					/* Byte 5 Bits 2-7 */
-  DAC960_V2_PhysicalDeviceState_T PhysicalDeviceState;	/* Byte 6 */
-  unsigned char NegotiatedDataWidthBits;		/* Byte 7 */
-  unsigned short NegotiatedSynchronousMegaTransfers;	/* Bytes 8-9 */
-  /* Multiported Physical Device Information */
-  unsigned char NumberOfPortConnections;		/* Byte 10 */
-  unsigned char DriveAccessibilityBitmap;		/* Byte 11 */
-  unsigned int :32;					/* Bytes 12-15 */
-  unsigned char NetworkAddress[16];			/* Bytes 16-31 */
-  unsigned short MaximumTags;				/* Bytes 32-33 */
-  /* Physical Device Operations Status */
-  bool ConsistencyCheckInProgress:1;			/* Byte 34 Bit 0 */
-  bool RebuildInProgress:1;				/* Byte 34 Bit 1 */
-  bool MakingDataConsistentInProgress:1;		/* Byte 34 Bit 2 */
-  bool PhysicalDeviceInitializationInProgress:1;	/* Byte 34 Bit 3 */
-  bool DataMigrationInProgress:1;			/* Byte 34 Bit 4 */
-  bool PatrolOperationInProgress:1;			/* Byte 34 Bit 5 */
-  unsigned char :2;					/* Byte 34 Bits 6-7 */
-  unsigned char LongOperationStatus;			/* Byte 35 */
-  unsigned char ParityErrors;				/* Byte 36 */
-  unsigned char SoftErrors;				/* Byte 37 */
-  unsigned char HardErrors;				/* Byte 38 */
-  unsigned char MiscellaneousErrors;			/* Byte 39 */
-  unsigned char CommandTimeouts;			/* Byte 40 */
-  unsigned char Retries;				/* Byte 41 */
-  unsigned char Aborts;					/* Byte 42 */
-  unsigned char PredictedFailuresDetected;		/* Byte 43 */
-  unsigned int :32;					/* Bytes 44-47 */
-  unsigned short :16;					/* Bytes 48-49 */
-  unsigned short DeviceBlockSizeInBytes;		/* Bytes 50-51 */
-  unsigned int OriginalDeviceSize;			/* Bytes 52-55 */
-  unsigned int ConfigurableDeviceSize;			/* Bytes 56-59 */
-  unsigned int :32;					/* Bytes 60-63 */
-  unsigned char PhysicalDeviceName[16];			/* Bytes 64-79 */
-  unsigned char Reserved1[16];				/* Bytes 80-95 */
-  unsigned char Reserved2[32];				/* Bytes 96-127 */
-  unsigned char SCSI_InquiryData[36];			/* Bytes 128-163 */
-  unsigned char Reserved3[20];				/* Bytes 164-183 */
-  unsigned char Reserved4[8];				/* Bytes 184-191 */
-  DAC960_ByteCount64_T LastReadBlockNumber;		/* Bytes 192-199 */
-  DAC960_ByteCount64_T LastWrittenBlockNumber;		/* Bytes 200-207 */
-  DAC960_ByteCount64_T ConsistencyCheckBlockNumber;	/* Bytes 208-215 */
-  DAC960_ByteCount64_T RebuildBlockNumber;		/* Bytes 216-223 */
-  DAC960_ByteCount64_T MakingDataConsistentBlockNumber;	/* Bytes 224-231 */
-  DAC960_ByteCount64_T DeviceInitializationBlockNumber; /* Bytes 232-239 */
-  DAC960_ByteCount64_T DataMigrationBlockNumber;	/* Bytes 240-247 */
-  DAC960_ByteCount64_T PatrolOperationBlockNumber;	/* Bytes 248-255 */
-  unsigned char Reserved5[256];				/* Bytes 256-511 */
-}
-DAC960_V2_PhysicalDeviceInfo_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Health Status Buffer structure.
-*/
-
-typedef struct DAC960_V2_HealthStatusBuffer
-{
-  unsigned int MicrosecondsFromControllerStartTime;	/* Bytes 0-3 */
-  unsigned int MillisecondsFromControllerStartTime;	/* Bytes 4-7 */
-  unsigned int SecondsFrom1January1970;			/* Bytes 8-11 */
-  unsigned int :32;					/* Bytes 12-15 */
-  unsigned int StatusChangeCounter;			/* Bytes 16-19 */
-  unsigned int :32;					/* Bytes 20-23 */
-  unsigned int DebugOutputMessageBufferIndex;		/* Bytes 24-27 */
-  unsigned int CodedMessageBufferIndex;			/* Bytes 28-31 */
-  unsigned int CurrentTimeTracePageNumber;		/* Bytes 32-35 */
-  unsigned int CurrentProfilerPageNumber;		/* Bytes 36-39 */
-  unsigned int NextEventSequenceNumber;			/* Bytes 40-43 */
-  unsigned int :32;					/* Bytes 44-47 */
-  unsigned char Reserved1[16];				/* Bytes 48-63 */
-  unsigned char Reserved2[64];				/* Bytes 64-127 */
-}
-DAC960_V2_HealthStatusBuffer_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Get Event reply structure.
-*/
-
-typedef struct DAC960_V2_Event
-{
-  unsigned int EventSequenceNumber;			/* Bytes 0-3 */
-  unsigned int EventTime;				/* Bytes 4-7 */
-  unsigned int EventCode;				/* Bytes 8-11 */
-  unsigned char :8;					/* Byte 12 */
-  unsigned char Channel;				/* Byte 13 */
-  unsigned char TargetID;				/* Byte 14 */
-  unsigned char LogicalUnit;				/* Byte 15 */
-  unsigned int :32;					/* Bytes 16-19 */
-  unsigned int EventSpecificParameter;			/* Bytes 20-23 */
-  unsigned char RequestSenseData[40];			/* Bytes 24-63 */
-}
-DAC960_V2_Event_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Command Control Bits structure.
-*/
-
-typedef struct DAC960_V2_CommandControlBits
-{
-  bool ForceUnitAccess:1;				/* Byte 0 Bit 0 */
-  bool DisablePageOut:1;				/* Byte 0 Bit 1 */
-  bool :1;						/* Byte 0 Bit 2 */
-  bool AdditionalScatterGatherListMemory:1;		/* Byte 0 Bit 3 */
-  bool DataTransferControllerToHost:1;			/* Byte 0 Bit 4 */
-  bool :1;						/* Byte 0 Bit 5 */
-  bool NoAutoRequestSense:1;				/* Byte 0 Bit 6 */
-  bool DisconnectProhibited:1;				/* Byte 0 Bit 7 */
-}
-DAC960_V2_CommandControlBits_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Command Timeout structure.
-*/
-
-typedef struct DAC960_V2_CommandTimeout
-{
-  unsigned char TimeoutValue:6;				/* Byte 0 Bits 0-5 */
-  enum {
-    DAC960_V2_TimeoutScale_Seconds =		0,
-    DAC960_V2_TimeoutScale_Minutes =		1,
-    DAC960_V2_TimeoutScale_Hours =		2,
-    DAC960_V2_TimeoutScale_Reserved =		3
-  } __attribute__ ((packed)) TimeoutScale:2;		/* Byte 0 Bits 6-7 */
-}
-DAC960_V2_CommandTimeout_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Physical Device structure.
-*/
-
-typedef struct DAC960_V2_PhysicalDevice
-{
-  unsigned char LogicalUnit;				/* Byte 0 */
-  unsigned char TargetID;				/* Byte 1 */
-  unsigned char Channel:3;				/* Byte 2 Bits 0-2 */
-  unsigned char Controller:5;				/* Byte 2 Bits 3-7 */
-}
-__attribute__ ((packed))
-DAC960_V2_PhysicalDevice_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Logical Device structure.
-*/
-
-typedef struct DAC960_V2_LogicalDevice
-{
-  unsigned short LogicalDeviceNumber;			/* Bytes 0-1 */
-  unsigned char :3;					/* Byte 2 Bits 0-2 */
-  unsigned char Controller:5;				/* Byte 2 Bits 3-7 */
-}
-__attribute__ ((packed))
-DAC960_V2_LogicalDevice_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Operation Device type.
-*/
-
-typedef enum
-{
-  DAC960_V2_Physical_Device =			0x00,
-  DAC960_V2_RAID_Device =			0x01,
-  DAC960_V2_Physical_Channel =			0x02,
-  DAC960_V2_RAID_Channel =			0x03,
-  DAC960_V2_Physical_Controller =		0x04,
-  DAC960_V2_RAID_Controller =			0x05,
-  DAC960_V2_Configuration_Group =		0x10,
-  DAC960_V2_Enclosure =				0x11
-}
-__attribute__ ((packed))
-DAC960_V2_OperationDevice_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Translate Physical To Logical Device structure.
-*/
-
-typedef struct DAC960_V2_PhysicalToLogicalDevice
-{
-  unsigned short LogicalDeviceNumber;			/* Bytes 0-1 */
-  unsigned short :16;					/* Bytes 2-3 */
-  unsigned char PreviousBootController;			/* Byte 4 */
-  unsigned char PreviousBootChannel;			/* Byte 5 */
-  unsigned char PreviousBootTargetID;			/* Byte 6 */
-  unsigned char PreviousBootLogicalUnit;		/* Byte 7 */
-}
-DAC960_V2_PhysicalToLogicalDevice_T;
-
-
-
-/*
-  Define the DAC960 V2 Firmware Scatter/Gather List Entry structure.
-*/
-
-typedef struct DAC960_V2_ScatterGatherSegment
-{
-  DAC960_BusAddress64_T SegmentDataPointer;		/* Bytes 0-7 */
-  DAC960_ByteCount64_T SegmentByteCount;		/* Bytes 8-15 */
-}
-DAC960_V2_ScatterGatherSegment_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Data Transfer Memory Address structure.
-*/
-
-typedef union DAC960_V2_DataTransferMemoryAddress
-{
-  DAC960_V2_ScatterGatherSegment_T ScatterGatherSegments[2]; /* Bytes 0-31 */
-  struct {
-    unsigned short ScatterGatherList0Length;		/* Bytes 0-1 */
-    unsigned short ScatterGatherList1Length;		/* Bytes 2-3 */
-    unsigned short ScatterGatherList2Length;		/* Bytes 4-5 */
-    unsigned short :16;					/* Bytes 6-7 */
-    DAC960_BusAddress64_T ScatterGatherList0Address;	/* Bytes 8-15 */
-    DAC960_BusAddress64_T ScatterGatherList1Address;	/* Bytes 16-23 */
-    DAC960_BusAddress64_T ScatterGatherList2Address;	/* Bytes 24-31 */
-  } ExtendedScatterGather;
-}
-DAC960_V2_DataTransferMemoryAddress_T;
-
-
-/*
-  Define the 64 Byte DAC960 V2 Firmware Command Mailbox structure.
-*/
-
-typedef union DAC960_V2_CommandMailbox
-{
-  unsigned int Words[16];				/* Words 0-15 */
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize:24;		/* Bytes 4-6 */
-    unsigned char DataTransferPageNumber;		/* Byte 7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    unsigned int :24;					/* Bytes 16-18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char IOCTL_Opcode;				/* Byte 21 */
-    unsigned char Reserved[10];				/* Bytes 22-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } Common;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize;		/* Bytes 4-7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    DAC960_V2_PhysicalDevice_T PhysicalDevice;		/* Bytes 16-18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char CDBLength;				/* Byte 21 */
-    unsigned char SCSI_CDB[10];				/* Bytes 22-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } SCSI_10;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize;		/* Bytes 4-7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    DAC960_V2_PhysicalDevice_T PhysicalDevice;		/* Bytes 16-18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char CDBLength;				/* Byte 21 */
-    unsigned short :16;					/* Bytes 22-23 */
-    DAC960_BusAddress64_T SCSI_CDB_BusAddress;		/* Bytes 24-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } SCSI_255;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize:24;		/* Bytes 4-6 */
-    unsigned char DataTransferPageNumber;		/* Byte 7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    unsigned short :16;					/* Bytes 16-17 */
-    unsigned char ControllerNumber;			/* Byte 18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char IOCTL_Opcode;				/* Byte 21 */
-    unsigned char Reserved[10];				/* Bytes 22-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } ControllerInfo;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize:24;		/* Bytes 4-6 */
-    unsigned char DataTransferPageNumber;		/* Byte 7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    DAC960_V2_LogicalDevice_T LogicalDevice;		/* Bytes 16-18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char IOCTL_Opcode;				/* Byte 21 */
-    unsigned char Reserved[10];				/* Bytes 22-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } LogicalDeviceInfo;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize:24;		/* Bytes 4-6 */
-    unsigned char DataTransferPageNumber;		/* Byte 7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    DAC960_V2_PhysicalDevice_T PhysicalDevice;		/* Bytes 16-18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char IOCTL_Opcode;				/* Byte 21 */
-    unsigned char Reserved[10];				/* Bytes 22-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } PhysicalDeviceInfo;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize:24;		/* Bytes 4-6 */
-    unsigned char DataTransferPageNumber;		/* Byte 7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    unsigned short EventSequenceNumberHigh16;		/* Bytes 16-17 */
-    unsigned char ControllerNumber;			/* Byte 18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char IOCTL_Opcode;				/* Byte 21 */
-    unsigned short EventSequenceNumberLow16;		/* Bytes 22-23 */
-    unsigned char Reserved[8];				/* Bytes 24-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } GetEvent;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize:24;		/* Bytes 4-6 */
-    unsigned char DataTransferPageNumber;		/* Byte 7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    DAC960_V2_LogicalDevice_T LogicalDevice;		/* Bytes 16-18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char IOCTL_Opcode;				/* Byte 21 */
-    union {
-      DAC960_V2_LogicalDeviceState_T LogicalDeviceState;
-      DAC960_V2_PhysicalDeviceState_T PhysicalDeviceState;
-    } DeviceState;					/* Byte 22 */
-    unsigned char Reserved[9];				/* Bytes 23-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } SetDeviceState;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize:24;		/* Bytes 4-6 */
-    unsigned char DataTransferPageNumber;		/* Byte 7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    DAC960_V2_LogicalDevice_T LogicalDevice;		/* Bytes 16-18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char IOCTL_Opcode;				/* Byte 21 */
-    bool RestoreConsistency:1;				/* Byte 22 Bit 0 */
-    bool InitializedAreaOnly:1;				/* Byte 22 Bit 1 */
-    unsigned char :6;					/* Byte 22 Bits 2-7 */
-    unsigned char Reserved[9];				/* Bytes 23-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } ConsistencyCheck;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    unsigned char FirstCommandMailboxSizeKB;		/* Byte 4 */
-    unsigned char FirstStatusMailboxSizeKB;		/* Byte 5 */
-    unsigned char SecondCommandMailboxSizeKB;		/* Byte 6 */
-    unsigned char SecondStatusMailboxSizeKB;		/* Byte 7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    unsigned int :24;					/* Bytes 16-18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char IOCTL_Opcode;				/* Byte 21 */
-    unsigned char HealthStatusBufferSizeKB;		/* Byte 22 */
-    unsigned char :8;					/* Byte 23 */
-    DAC960_BusAddress64_T HealthStatusBufferBusAddress; /* Bytes 24-31 */
-    DAC960_BusAddress64_T FirstCommandMailboxBusAddress; /* Bytes 32-39 */
-    DAC960_BusAddress64_T FirstStatusMailboxBusAddress; /* Bytes 40-47 */
-    DAC960_BusAddress64_T SecondCommandMailboxBusAddress; /* Bytes 48-55 */
-    DAC960_BusAddress64_T SecondStatusMailboxBusAddress; /* Bytes 56-63 */
-  } SetMemoryMailbox;
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandOpcode_T CommandOpcode;		/* Byte 2 */
-    DAC960_V2_CommandControlBits_T CommandControlBits;	/* Byte 3 */
-    DAC960_ByteCount32_T DataTransferSize:24;		/* Bytes 4-6 */
-    unsigned char DataTransferPageNumber;		/* Byte 7 */
-    DAC960_BusAddress64_T RequestSenseBusAddress;	/* Bytes 8-15 */
-    DAC960_V2_PhysicalDevice_T PhysicalDevice;		/* Bytes 16-18 */
-    DAC960_V2_CommandTimeout_T CommandTimeout;		/* Byte 19 */
-    unsigned char RequestSenseSize;			/* Byte 20 */
-    unsigned char IOCTL_Opcode;				/* Byte 21 */
-    DAC960_V2_OperationDevice_T OperationDevice;	/* Byte 22 */
-    unsigned char Reserved[9];				/* Bytes 23-31 */
-    DAC960_V2_DataTransferMemoryAddress_T
-      DataTransferMemoryAddress;			/* Bytes 32-63 */
-  } DeviceOperation;
-}
-DAC960_V2_CommandMailbox_T;
-
-
-/*
-  Define the DAC960 Driver IOCTL requests.
-*/
-
-#define DAC960_IOCTL_GET_CONTROLLER_COUNT	0xDAC001
-#define DAC960_IOCTL_GET_CONTROLLER_INFO	0xDAC002
-#define DAC960_IOCTL_V1_EXECUTE_COMMAND		0xDAC003
-#define DAC960_IOCTL_V2_EXECUTE_COMMAND		0xDAC004
-#define DAC960_IOCTL_V2_GET_HEALTH_STATUS	0xDAC005
-
-
-/*
-  Define the DAC960_IOCTL_GET_CONTROLLER_INFO reply structure.
-*/
-
-typedef struct DAC960_ControllerInfo
-{
-  unsigned char ControllerNumber;
-  unsigned char FirmwareType;
-  unsigned char Channels;
-  unsigned char Targets;
-  unsigned char PCI_Bus;
-  unsigned char PCI_Device;
-  unsigned char PCI_Function;
-  unsigned char IRQ_Channel;
-  DAC960_PCI_Address_T PCI_Address;
-  unsigned char ModelName[20];
-  unsigned char FirmwareVersion[12];
-}
-DAC960_ControllerInfo_T;
-
-
-/*
-  Define the User Mode DAC960_IOCTL_V1_EXECUTE_COMMAND request structure.
-*/
-
-typedef struct DAC960_V1_UserCommand
-{
-  unsigned char ControllerNumber;
-  DAC960_V1_CommandMailbox_T CommandMailbox;
-  int DataTransferLength;
-  void __user *DataTransferBuffer;
-  DAC960_V1_DCDB_T __user *DCDB;
-}
-DAC960_V1_UserCommand_T;
-
-
-/*
-  Define the Kernel Mode DAC960_IOCTL_V1_EXECUTE_COMMAND request structure.
-*/
-
-typedef struct DAC960_V1_KernelCommand
-{
-  unsigned char ControllerNumber;
-  DAC960_V1_CommandMailbox_T CommandMailbox;
-  int DataTransferLength;
-  void *DataTransferBuffer;
-  DAC960_V1_DCDB_T *DCDB;
-  DAC960_V1_CommandStatus_T CommandStatus;
-  void (*CompletionFunction)(struct DAC960_V1_KernelCommand *);
-  void *CompletionData;
-}
-DAC960_V1_KernelCommand_T;
-
-
-/*
-  Define the User Mode DAC960_IOCTL_V2_EXECUTE_COMMAND request structure.
-*/
-
-typedef struct DAC960_V2_UserCommand
-{
-  unsigned char ControllerNumber;
-  DAC960_V2_CommandMailbox_T CommandMailbox;
-  int DataTransferLength;
-  int RequestSenseLength;
-  void __user *DataTransferBuffer;
-  void __user *RequestSenseBuffer;
-}
-DAC960_V2_UserCommand_T;
-
-
-/*
-  Define the Kernel Mode DAC960_IOCTL_V2_EXECUTE_COMMAND request structure.
-*/
-
-typedef struct DAC960_V2_KernelCommand
-{
-  unsigned char ControllerNumber;
-  DAC960_V2_CommandMailbox_T CommandMailbox;
-  int DataTransferLength;
-  int RequestSenseLength;
-  void *DataTransferBuffer;
-  void *RequestSenseBuffer;
-  DAC960_V2_CommandStatus_T CommandStatus;
-  void (*CompletionFunction)(struct DAC960_V2_KernelCommand *);
-  void *CompletionData;
-}
-DAC960_V2_KernelCommand_T;
-
-
-/*
-  Define the User Mode DAC960_IOCTL_V2_GET_HEALTH_STATUS request structure.
-*/
-
-typedef struct DAC960_V2_GetHealthStatus
-{
-  unsigned char ControllerNumber;
-  DAC960_V2_HealthStatusBuffer_T __user *HealthStatusBuffer;
-}
-DAC960_V2_GetHealthStatus_T;
-
-
-/*
-  Import the Kernel Mode IOCTL interface.
-*/
-
-extern int DAC960_KernelIOCTL(unsigned int Request, void *Argument);
-
-
-/*
-  DAC960_DriverVersion protects the private portion of this file.
-*/
-
-#ifdef DAC960_DriverVersion
-
-
-/*
-  Define the maximum Driver Queue Depth and Controller Queue Depth supported
-  by DAC960 V1 and V2 Firmware Controllers.
-*/
-
-#define DAC960_MaxDriverQueueDepth		511
-#define DAC960_MaxControllerQueueDepth		512
-
-
-/*
-  Define the maximum number of Scatter/Gather Segments supported for any
-  DAC960 V1 and V2 Firmware controller.
-*/
-
-#define DAC960_V1_ScatterGatherLimit		33
-#define DAC960_V2_ScatterGatherLimit		128
-
-
-/*
-  Define the number of Command Mailboxes and Status Mailboxes used by the
-  DAC960 V1 and V2 Firmware Memory Mailbox Interface.
-*/
-
-#define DAC960_V1_CommandMailboxCount		256
-#define DAC960_V1_StatusMailboxCount		1024
-#define DAC960_V2_CommandMailboxCount		512
-#define DAC960_V2_StatusMailboxCount		512
-
-
-/*
-  Define the DAC960 Controller Monitoring Timer Interval.
-*/
-
-#define DAC960_MonitoringTimerInterval		(10 * HZ)
-
-
-/*
-  Define the DAC960 Controller Secondary Monitoring Interval.
-*/
-
-#define DAC960_SecondaryMonitoringInterval	(60 * HZ)
-
-
-/*
-  Define the DAC960 Controller Health Status Monitoring Interval.
-*/
-
-#define DAC960_HealthStatusMonitoringInterval	(1 * HZ)
-
-
-/*
-  Define the DAC960 Controller Progress Reporting Interval.
-*/
-
-#define DAC960_ProgressReportingInterval	(60 * HZ)
-
-
-/*
-  Define the maximum number of Partitions allowed for each Logical Drive.
-*/
-
-#define DAC960_MaxPartitions			8
-#define DAC960_MaxPartitionsBits		3
-
-/*
-  Define the DAC960 Controller fixed Block Size and Block Size Bits.
-*/
-
-#define DAC960_BlockSize			512
-#define DAC960_BlockSizeBits			9
-
-
-/*
-  Define the number of Command structures that should be allocated as a
-  group to optimize kernel memory allocation.
-*/
-
-#define DAC960_V1_CommandAllocationGroupSize	11
-#define DAC960_V2_CommandAllocationGroupSize	29
-
-
-/*
-  Define the Controller Line Buffer, Progress Buffer, User Message, and
-  Initial Status Buffer sizes.
-*/
-
-#define DAC960_LineBufferSize			100
-#define DAC960_ProgressBufferSize		200
-#define DAC960_UserMessageSize			200
-#define DAC960_InitialStatusBufferSize		(8192-32)
-
-
-/*
-  Define the DAC960 Controller Firmware Types.
-*/
-
-typedef enum
-{
-  DAC960_V1_Controller =			1,
-  DAC960_V2_Controller =			2
-}
-DAC960_FirmwareType_T;
-
-
-/*
-  Define the DAC960 Controller Hardware Types.
-*/
-
-typedef enum
-{
-  DAC960_BA_Controller =			1,	/* eXtremeRAID 2000 */
-  DAC960_LP_Controller =			2,	/* AcceleRAID 352 */
-  DAC960_LA_Controller =			3,	/* DAC1164P */
-  DAC960_PG_Controller =			4,	/* DAC960PTL/PJ/PG */
-  DAC960_PD_Controller =			5,	/* DAC960PU/PD/PL/P */
-  DAC960_P_Controller =				6,	/* DAC960PU/PD/PL/P */
-  DAC960_GEM_Controller =			7,	/* AcceleRAID 4/5/600 */
-}
-DAC960_HardwareType_T;
-
-
-/*
-  Define the Driver Message Levels.
-*/
-
-typedef enum DAC960_MessageLevel
-{
-  DAC960_AnnounceLevel =			0,
-  DAC960_InfoLevel =				1,
-  DAC960_NoticeLevel =				2,
-  DAC960_WarningLevel =				3,
-  DAC960_ErrorLevel =				4,
-  DAC960_ProgressLevel =			5,
-  DAC960_CriticalLevel =			6,
-  DAC960_UserCriticalLevel =			7
-}
-DAC960_MessageLevel_T;
-
-static char
-  *DAC960_MessageLevelMap[] =
-    { KERN_NOTICE, KERN_NOTICE, KERN_NOTICE, KERN_WARNING,
-      KERN_ERR, KERN_CRIT, KERN_CRIT, KERN_CRIT };
-
-
-/*
-  Define Driver Message macros.
-*/
-
-#define DAC960_Announce(Format, Arguments...) \
-  DAC960_Message(DAC960_AnnounceLevel, Format, ##Arguments)
-
-#define DAC960_Info(Format, Arguments...) \
-  DAC960_Message(DAC960_InfoLevel, Format, ##Arguments)
-
-#define DAC960_Notice(Format, Arguments...) \
-  DAC960_Message(DAC960_NoticeLevel, Format, ##Arguments)
-
-#define DAC960_Warning(Format, Arguments...) \
-  DAC960_Message(DAC960_WarningLevel, Format, ##Arguments)
-
-#define DAC960_Error(Format, Arguments...) \
-  DAC960_Message(DAC960_ErrorLevel, Format, ##Arguments)
-
-#define DAC960_Progress(Format, Arguments...) \
-  DAC960_Message(DAC960_ProgressLevel, Format, ##Arguments)
-
-#define DAC960_Critical(Format, Arguments...) \
-  DAC960_Message(DAC960_CriticalLevel, Format, ##Arguments)
-
-#define DAC960_UserCritical(Format, Arguments...) \
-  DAC960_Message(DAC960_UserCriticalLevel, Format, ##Arguments)
-
-
-struct DAC960_privdata {
-	DAC960_HardwareType_T	HardwareType;
-	DAC960_FirmwareType_T	FirmwareType;
-	irq_handler_t		InterruptHandler;
-	unsigned int		MemoryWindowSize;
-};
-
-
-/*
-  Define the DAC960 V1 Firmware Controller Status Mailbox structure.
-*/
-
-typedef union DAC960_V1_StatusMailbox
-{
-  unsigned int Word;					/* Word 0 */
-  struct {
-    DAC960_V1_CommandIdentifier_T CommandIdentifier;	/* Byte 0 */
-    unsigned char :7;					/* Byte 1 Bits 0-6 */
-    bool Valid:1;					/* Byte 1 Bit 7 */
-    DAC960_V1_CommandStatus_T CommandStatus;		/* Bytes 2-3 */
-  } Fields;
-}
-DAC960_V1_StatusMailbox_T;
-
-
-/*
-  Define the DAC960 V2 Firmware Controller Status Mailbox structure.
-*/
-
-typedef union DAC960_V2_StatusMailbox
-{
-  unsigned int Words[2];				/* Words 0-1 */
-  struct {
-    DAC960_V2_CommandIdentifier_T CommandIdentifier;	/* Bytes 0-1 */
-    DAC960_V2_CommandStatus_T CommandStatus;		/* Byte 2 */
-    unsigned char RequestSenseLength;			/* Byte 3 */
-    int DataTransferResidue;				/* Bytes 4-7 */
-  } Fields;
-}
-DAC960_V2_StatusMailbox_T;
-
-
-/*
-  Define the DAC960 Driver Command Types.
-*/
-
-typedef enum
-{
-  DAC960_ReadCommand =				1,
-  DAC960_WriteCommand =				2,
-  DAC960_ReadRetryCommand =			3,
-  DAC960_WriteRetryCommand =			4,
-  DAC960_MonitoringCommand =			5,
-  DAC960_ImmediateCommand =			6,
-  DAC960_QueuedCommand =			7
-}
-DAC960_CommandType_T;
-
-
-/*
-  Define the DAC960 Driver Command structure.
-*/
-
-typedef struct DAC960_Command
-{
-  int CommandIdentifier;
-  DAC960_CommandType_T CommandType;
-  struct DAC960_Controller *Controller;
-  struct DAC960_Command *Next;
-  struct completion *Completion;
-  unsigned int LogicalDriveNumber;
-  unsigned int BlockNumber;
-  unsigned int BlockCount;
-  unsigned int SegmentCount;
-  int	DmaDirection;
-  struct scatterlist *cmd_sglist;
-  struct request *Request;
-  union {
-    struct {
-      DAC960_V1_CommandMailbox_T CommandMailbox;
-      DAC960_V1_KernelCommand_T *KernelCommand;
-      DAC960_V1_CommandStatus_T CommandStatus;
-      DAC960_V1_ScatterGatherSegment_T *ScatterGatherList;
-      dma_addr_t ScatterGatherListDMA;
-      struct scatterlist ScatterList[DAC960_V1_ScatterGatherLimit];
-      unsigned int EndMarker[0];
-    } V1;
-    struct {
-      DAC960_V2_CommandMailbox_T CommandMailbox;
-      DAC960_V2_KernelCommand_T *KernelCommand;
-      DAC960_V2_CommandStatus_T CommandStatus;
-      unsigned char RequestSenseLength;
-      int DataTransferResidue;
-      DAC960_V2_ScatterGatherSegment_T *ScatterGatherList;
-      dma_addr_t ScatterGatherListDMA;
-      DAC960_SCSI_RequestSense_T *RequestSense;
-      dma_addr_t RequestSenseDMA;
-      struct scatterlist ScatterList[DAC960_V2_ScatterGatherLimit];
-      unsigned int EndMarker[0];
-    } V2;
-  } FW;
-}
-DAC960_Command_T;
-
-
-/*
-  Define the DAC960 Driver Controller structure.
-*/
-
-typedef struct DAC960_Controller
-{
-  void __iomem *BaseAddress;
-  void __iomem *MemoryMappedAddress;
-  DAC960_FirmwareType_T FirmwareType;
-  DAC960_HardwareType_T HardwareType;
-  DAC960_IO_Address_T IO_Address;
-  DAC960_PCI_Address_T PCI_Address;
-  struct pci_dev *PCIDevice;
-  unsigned char ControllerNumber;
-  unsigned char ControllerName[4];
-  unsigned char ModelName[20];
-  unsigned char FullModelName[28];
-  unsigned char FirmwareVersion[12];
-  unsigned char Bus;
-  unsigned char Device;
-  unsigned char Function;
-  unsigned char IRQ_Channel;
-  unsigned char Channels;
-  unsigned char Targets;
-  unsigned char MemorySize;
-  unsigned char LogicalDriveCount;
-  unsigned short CommandAllocationGroupSize;
-  unsigned short ControllerQueueDepth;
-  unsigned short DriverQueueDepth;
-  unsigned short MaxBlocksPerCommand;
-  unsigned short ControllerScatterGatherLimit;
-  unsigned short DriverScatterGatherLimit;
-  unsigned int CombinedStatusBufferLength;
-  unsigned int InitialStatusLength;
-  unsigned int CurrentStatusLength;
-  unsigned int ProgressBufferLength;
-  unsigned int UserStatusLength;
-  struct dma_loaf DmaPages;
-  unsigned long MonitoringTimerCount;
-  unsigned long PrimaryMonitoringTime;
-  unsigned long SecondaryMonitoringTime;
-  unsigned long ShutdownMonitoringTimer;
-  unsigned long LastProgressReportTime;
-  unsigned long LastCurrentStatusTime;
-  bool ControllerInitialized;
-  bool MonitoringCommandDeferred;
-  bool EphemeralProgressMessage;
-  bool DriveSpinUpMessageDisplayed;
-  bool MonitoringAlertMode;
-  bool SuppressEnclosureMessages;
-  struct timer_list MonitoringTimer;
-  struct gendisk *disks[DAC960_MaxLogicalDrives];
-  struct dma_pool *ScatterGatherPool;
-  DAC960_Command_T *FreeCommands;
-  unsigned char *CombinedStatusBuffer;
-  unsigned char *CurrentStatusBuffer;
-  struct request_queue *RequestQueue[DAC960_MaxLogicalDrives];
-  int req_q_index;
-  spinlock_t queue_lock;
-  wait_queue_head_t CommandWaitQueue;
-  wait_queue_head_t HealthStatusWaitQueue;
-  DAC960_Command_T InitialCommand;
-  DAC960_Command_T *Commands[DAC960_MaxDriverQueueDepth];
-  struct proc_dir_entry *ControllerProcEntry;
-  bool LogicalDriveInitiallyAccessible[DAC960_MaxLogicalDrives];
-  void (*QueueCommand)(DAC960_Command_T *Command);
-  bool (*ReadControllerConfiguration)(struct DAC960_Controller *);
-  bool (*ReadDeviceConfiguration)(struct DAC960_Controller *);
-  bool (*ReportDeviceConfiguration)(struct DAC960_Controller *);
-  void (*QueueReadWriteCommand)(DAC960_Command_T *Command);
-  union {
-    struct {
-      unsigned char GeometryTranslationHeads;
-      unsigned char GeometryTranslationSectors;
-      unsigned char PendingRebuildFlag;
-      unsigned short StripeSize;
-      unsigned short SegmentSize;
-      unsigned short NewEventLogSequenceNumber;
-      unsigned short OldEventLogSequenceNumber;
-      unsigned short DeviceStateChannel;
-      unsigned short DeviceStateTargetID;
-      bool DualModeMemoryMailboxInterface;
-      bool BackgroundInitializationStatusSupported;
-      bool SAFTE_EnclosureManagementEnabled;
-      bool NeedLogicalDriveInformation;
-      bool NeedErrorTableInformation;
-      bool NeedDeviceStateInformation;
-      bool NeedDeviceInquiryInformation;
-      bool NeedDeviceSerialNumberInformation;
-      bool NeedRebuildProgress;
-      bool NeedConsistencyCheckProgress;
-      bool NeedBackgroundInitializationStatus;
-      bool StartDeviceStateScan;
-      bool RebuildProgressFirst;
-      bool RebuildFlagPending;
-      bool RebuildStatusPending;
-
-      dma_addr_t	FirstCommandMailboxDMA;
-      DAC960_V1_CommandMailbox_T *FirstCommandMailbox;
-      DAC960_V1_CommandMailbox_T *LastCommandMailbox;
-      DAC960_V1_CommandMailbox_T *NextCommandMailbox;
-      DAC960_V1_CommandMailbox_T *PreviousCommandMailbox1;
-      DAC960_V1_CommandMailbox_T *PreviousCommandMailbox2;
-
-      dma_addr_t	FirstStatusMailboxDMA;
-      DAC960_V1_StatusMailbox_T *FirstStatusMailbox;
-      DAC960_V1_StatusMailbox_T *LastStatusMailbox;
-      DAC960_V1_StatusMailbox_T *NextStatusMailbox;
-
-      DAC960_V1_DCDB_T *MonitoringDCDB;
-      dma_addr_t MonitoringDCDB_DMA;
-
-      DAC960_V1_Enquiry_T Enquiry;
-      DAC960_V1_Enquiry_T *NewEnquiry;
-      dma_addr_t NewEnquiryDMA;
-
-      DAC960_V1_ErrorTable_T ErrorTable;
-      DAC960_V1_ErrorTable_T *NewErrorTable;
-      dma_addr_t NewErrorTableDMA;
-
-      DAC960_V1_EventLogEntry_T *EventLogEntry;
-      dma_addr_t EventLogEntryDMA;
-
-      DAC960_V1_RebuildProgress_T *RebuildProgress;
-      dma_addr_t RebuildProgressDMA;
-      DAC960_V1_CommandStatus_T LastRebuildStatus;
-      DAC960_V1_CommandStatus_T PendingRebuildStatus;
-
-      DAC960_V1_LogicalDriveInformationArray_T LogicalDriveInformation;
-      DAC960_V1_LogicalDriveInformationArray_T *NewLogicalDriveInformation;
-      dma_addr_t NewLogicalDriveInformationDMA;
-
-      DAC960_V1_BackgroundInitializationStatus_T
-        	*BackgroundInitializationStatus;
-      dma_addr_t BackgroundInitializationStatusDMA;
-      DAC960_V1_BackgroundInitializationStatus_T
-        	LastBackgroundInitializationStatus;
-
-      DAC960_V1_DeviceState_T
-	DeviceState[DAC960_V1_MaxChannels][DAC960_V1_MaxTargets];
-      DAC960_V1_DeviceState_T *NewDeviceState;
-      dma_addr_t	NewDeviceStateDMA;
-
-      DAC960_SCSI_Inquiry_T
-	InquiryStandardData[DAC960_V1_MaxChannels][DAC960_V1_MaxTargets];
-      DAC960_SCSI_Inquiry_T *NewInquiryStandardData;
-      dma_addr_t NewInquiryStandardDataDMA;
-
-      DAC960_SCSI_Inquiry_UnitSerialNumber_T
-	InquiryUnitSerialNumber[DAC960_V1_MaxChannels][DAC960_V1_MaxTargets];
-      DAC960_SCSI_Inquiry_UnitSerialNumber_T *NewInquiryUnitSerialNumber;
-      dma_addr_t NewInquiryUnitSerialNumberDMA;
-
-      int DeviceResetCount[DAC960_V1_MaxChannels][DAC960_V1_MaxTargets];
-      bool DirectCommandActive[DAC960_V1_MaxChannels][DAC960_V1_MaxTargets];
-    } V1;
-    struct {
-      unsigned int StatusChangeCounter;
-      unsigned int NextEventSequenceNumber;
-      unsigned int PhysicalDeviceIndex;
-      bool NeedLogicalDeviceInformation;
-      bool NeedPhysicalDeviceInformation;
-      bool NeedDeviceSerialNumberInformation;
-      bool StartLogicalDeviceInformationScan;
-      bool StartPhysicalDeviceInformationScan;
-      struct dma_pool *RequestSensePool;
-
-      dma_addr_t	FirstCommandMailboxDMA;
-      DAC960_V2_CommandMailbox_T *FirstCommandMailbox;
-      DAC960_V2_CommandMailbox_T *LastCommandMailbox;
-      DAC960_V2_CommandMailbox_T *NextCommandMailbox;
-      DAC960_V2_CommandMailbox_T *PreviousCommandMailbox1;
-      DAC960_V2_CommandMailbox_T *PreviousCommandMailbox2;
-
-      dma_addr_t	FirstStatusMailboxDMA;
-      DAC960_V2_StatusMailbox_T *FirstStatusMailbox;
-      DAC960_V2_StatusMailbox_T *LastStatusMailbox;
-      DAC960_V2_StatusMailbox_T *NextStatusMailbox;
-
-      dma_addr_t	HealthStatusBufferDMA;
-      DAC960_V2_HealthStatusBuffer_T *HealthStatusBuffer;
-
-      DAC960_V2_ControllerInfo_T ControllerInformation;
-      DAC960_V2_ControllerInfo_T *NewControllerInformation;
-      dma_addr_t	NewControllerInformationDMA;
-
-      DAC960_V2_LogicalDeviceInfo_T
-	*LogicalDeviceInformation[DAC960_MaxLogicalDrives];
-      DAC960_V2_LogicalDeviceInfo_T *NewLogicalDeviceInformation;
-      dma_addr_t	 NewLogicalDeviceInformationDMA;
-
-      DAC960_V2_PhysicalDeviceInfo_T
-	*PhysicalDeviceInformation[DAC960_V2_MaxPhysicalDevices];
-      DAC960_V2_PhysicalDeviceInfo_T *NewPhysicalDeviceInformation;
-      dma_addr_t	NewPhysicalDeviceInformationDMA;
-
-      DAC960_SCSI_Inquiry_UnitSerialNumber_T *NewInquiryUnitSerialNumber;
-      dma_addr_t	NewInquiryUnitSerialNumberDMA;
-      DAC960_SCSI_Inquiry_UnitSerialNumber_T
-	*InquiryUnitSerialNumber[DAC960_V2_MaxPhysicalDevices];
-
-      DAC960_V2_Event_T *Event;
-      dma_addr_t EventDMA;
-
-      DAC960_V2_PhysicalToLogicalDevice_T *PhysicalToLogicalDevice;
-      dma_addr_t PhysicalToLogicalDeviceDMA;
-
-      DAC960_V2_PhysicalDevice_T
-	LogicalDriveToVirtualDevice[DAC960_MaxLogicalDrives];
-      bool LogicalDriveFoundDuringScan[DAC960_MaxLogicalDrives];
-    } V2;
-  } FW;
-  unsigned char ProgressBuffer[DAC960_ProgressBufferSize];
-  unsigned char UserStatusBuffer[DAC960_UserMessageSize];
-}
-DAC960_Controller_T;
-
-
-/*
-  Simplify access to Firmware Version Dependent Data Structure Components
-  and Functions.
-*/
-
-#define V1				FW.V1
-#define V2				FW.V2
-#define DAC960_QueueCommand(Command) \
-  (Controller->QueueCommand)(Command)
-#define DAC960_ReadControllerConfiguration(Controller) \
-  (Controller->ReadControllerConfiguration)(Controller)
-#define DAC960_ReadDeviceConfiguration(Controller) \
-  (Controller->ReadDeviceConfiguration)(Controller)
-#define DAC960_ReportDeviceConfiguration(Controller) \
-  (Controller->ReportDeviceConfiguration)(Controller)
-#define DAC960_QueueReadWriteCommand(Command) \
-  (Controller->QueueReadWriteCommand)(Command)
-
-/*
- * dma_addr_writeql is provided to write dma_addr_t types
- * to a 64-bit pci address space register.  The controller
- * will accept having the register written as two 32-bit
- * values.
- *
- * In HIGHMEM kernels, dma_addr_t is a 64-bit value.
- * without HIGHMEM,  dma_addr_t is a 32-bit value.
- *
- * The compiler should always fix up the assignment
- * to u.wq appropriately, depending upon the size of
- * dma_addr_t.
- */
-static inline
-void dma_addr_writeql(dma_addr_t addr, void __iomem *write_address)
-{
-	union {
-		u64 wq;
-		uint wl[2];
-	} u;
-
-	u.wq = addr;
-
-	writel(u.wl[0], write_address);
-	writel(u.wl[1], write_address + 4);
-}
-
-/*
-  Define the DAC960 GEM Series Controller Interface Register Offsets.
- */
-
-#define DAC960_GEM_RegisterWindowSize	0x600
-
-typedef enum
-{
-  DAC960_GEM_InboundDoorBellRegisterReadSetOffset   =   0x214,
-  DAC960_GEM_InboundDoorBellRegisterClearOffset     =   0x218,
-  DAC960_GEM_OutboundDoorBellRegisterReadSetOffset  =   0x224,
-  DAC960_GEM_OutboundDoorBellRegisterClearOffset    =   0x228,
-  DAC960_GEM_InterruptStatusRegisterOffset          =   0x208,
-  DAC960_GEM_InterruptMaskRegisterReadSetOffset     =   0x22C,
-  DAC960_GEM_InterruptMaskRegisterClearOffset       =   0x230,
-  DAC960_GEM_CommandMailboxBusAddressOffset         =   0x510,
-  DAC960_GEM_CommandStatusOffset                    =   0x518,
-  DAC960_GEM_ErrorStatusRegisterReadSetOffset       =   0x224,
-  DAC960_GEM_ErrorStatusRegisterClearOffset         =   0x228,
-}
-DAC960_GEM_RegisterOffsets_T;
-
-/*
-  Define the structure of the DAC960 GEM Series Inbound Door Bell
- */
-
-typedef union DAC960_GEM_InboundDoorBellRegister
-{
-  unsigned int All;
-  struct {
-    unsigned int :24;
-    bool HardwareMailboxNewCommand:1;
-    bool AcknowledgeHardwareMailboxStatus:1;
-    bool GenerateInterrupt:1;
-    bool ControllerReset:1;
-    bool MemoryMailboxNewCommand:1;
-    unsigned int :3;
-  } Write;
-  struct {
-    unsigned int :24;
-    bool HardwareMailboxFull:1;
-    bool InitializationInProgress:1;
-    unsigned int :6;
-  } Read;
-}
-DAC960_GEM_InboundDoorBellRegister_T;
-
-/*
-  Define the structure of the DAC960 GEM Series Outbound Door Bell Register.
- */
-typedef union DAC960_GEM_OutboundDoorBellRegister
-{
-  unsigned int All;
-  struct {
-    unsigned int :24;
-    bool AcknowledgeHardwareMailboxInterrupt:1;
-    bool AcknowledgeMemoryMailboxInterrupt:1;
-    unsigned int :6;
-  } Write;
-  struct {
-    unsigned int :24;
-    bool HardwareMailboxStatusAvailable:1;
-    bool MemoryMailboxStatusAvailable:1;
-    unsigned int :6;
-  } Read;
-}
-DAC960_GEM_OutboundDoorBellRegister_T;
-
-/*
-  Define the structure of the DAC960 GEM Series Interrupt Mask Register.
- */
-typedef union DAC960_GEM_InterruptMaskRegister
-{
-  unsigned int All;
-  struct {
-    unsigned int :16;
-    unsigned int :8;
-    unsigned int HardwareMailboxInterrupt:1;
-    unsigned int MemoryMailboxInterrupt:1;
-    unsigned int :6;
-  } Bits;
-}
-DAC960_GEM_InterruptMaskRegister_T;
-
-/*
-  Define the structure of the DAC960 GEM Series Error Status Register.
- */
-
-typedef union DAC960_GEM_ErrorStatusRegister
-{
-  unsigned int All;
-  struct {
-    unsigned int :24;
-    unsigned int :5;
-    bool ErrorStatusPending:1;
-    unsigned int :2;
-  } Bits;
-}
-DAC960_GEM_ErrorStatusRegister_T;
-
-/*
-  Define inline functions to provide an abstraction for reading and writing the
-  DAC960 GEM Series Controller Interface Registers.
-*/
-
-static inline
-void DAC960_GEM_HardwareMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.HardwareMailboxNewCommand = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_InboundDoorBellRegisterReadSetOffset);
-}
-
-static inline
-void DAC960_GEM_AcknowledgeHardwareMailboxStatus(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.AcknowledgeHardwareMailboxStatus = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_InboundDoorBellRegisterClearOffset);
-}
-
-static inline
-void DAC960_GEM_GenerateInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.GenerateInterrupt = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_InboundDoorBellRegisterReadSetOffset);
-}
-
-static inline
-void DAC960_GEM_ControllerReset(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.ControllerReset = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_InboundDoorBellRegisterReadSetOffset);
-}
-
-static inline
-void DAC960_GEM_MemoryMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.MemoryMailboxNewCommand = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_InboundDoorBellRegisterReadSetOffset);
-}
-
-static inline
-bool DAC960_GEM_HardwareMailboxFullP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readl(ControllerBaseAddress +
-          DAC960_GEM_InboundDoorBellRegisterReadSetOffset);
-  return InboundDoorBellRegister.Read.HardwareMailboxFull;
-}
-
-static inline
-bool DAC960_GEM_InitializationInProgressP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readl(ControllerBaseAddress +
-          DAC960_GEM_InboundDoorBellRegisterReadSetOffset);
-  return InboundDoorBellRegister.Read.InitializationInProgress;
-}
-
-static inline
-void DAC960_GEM_AcknowledgeHardwareMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  writel(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_OutboundDoorBellRegisterClearOffset);
-}
-
-static inline
-void DAC960_GEM_AcknowledgeMemoryMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writel(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_OutboundDoorBellRegisterClearOffset);
-}
-
-static inline
-void DAC960_GEM_AcknowledgeInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writel(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_OutboundDoorBellRegisterClearOffset);
-}
-
-static inline
-bool DAC960_GEM_HardwareMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readl(ControllerBaseAddress +
-          DAC960_GEM_OutboundDoorBellRegisterReadSetOffset);
-  return OutboundDoorBellRegister.Read.HardwareMailboxStatusAvailable;
-}
-
-static inline
-bool DAC960_GEM_MemoryMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readl(ControllerBaseAddress +
-          DAC960_GEM_OutboundDoorBellRegisterReadSetOffset);
-  return OutboundDoorBellRegister.Read.MemoryMailboxStatusAvailable;
-}
-
-static inline
-void DAC960_GEM_EnableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0;
-  InterruptMaskRegister.Bits.HardwareMailboxInterrupt = true;
-  InterruptMaskRegister.Bits.MemoryMailboxInterrupt = true;
-  writel(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_InterruptMaskRegisterClearOffset);
-}
-
-static inline
-void DAC960_GEM_DisableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0;
-  InterruptMaskRegister.Bits.HardwareMailboxInterrupt = true;
-  InterruptMaskRegister.Bits.MemoryMailboxInterrupt = true;
-  writel(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_GEM_InterruptMaskRegisterReadSetOffset);
-}
-
-static inline
-bool DAC960_GEM_InterruptsEnabledP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_GEM_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All =
-    readl(ControllerBaseAddress +
-          DAC960_GEM_InterruptMaskRegisterReadSetOffset);
-  return !(InterruptMaskRegister.Bits.HardwareMailboxInterrupt ||
-           InterruptMaskRegister.Bits.MemoryMailboxInterrupt);
-}
-
-static inline
-void DAC960_GEM_WriteCommandMailbox(DAC960_V2_CommandMailbox_T
-				     *MemoryCommandMailbox,
-				   DAC960_V2_CommandMailbox_T
-				     *CommandMailbox)
-{
-  memcpy(&MemoryCommandMailbox->Words[1], &CommandMailbox->Words[1],
-	 sizeof(DAC960_V2_CommandMailbox_T) - sizeof(unsigned int));
-  wmb();
-  MemoryCommandMailbox->Words[0] = CommandMailbox->Words[0];
-  mb();
-}
-
-static inline
-void DAC960_GEM_WriteHardwareMailbox(void __iomem *ControllerBaseAddress,
-				    dma_addr_t CommandMailboxDMA)
-{
-	dma_addr_writeql(CommandMailboxDMA,
-		ControllerBaseAddress +
-		DAC960_GEM_CommandMailboxBusAddressOffset);
-}
-
-static inline DAC960_V2_CommandIdentifier_T
-DAC960_GEM_ReadCommandIdentifier(void __iomem *ControllerBaseAddress)
-{
-  return readw(ControllerBaseAddress + DAC960_GEM_CommandStatusOffset);
-}
-
-static inline DAC960_V2_CommandStatus_T
-DAC960_GEM_ReadCommandStatus(void __iomem *ControllerBaseAddress)
-{
-  return readw(ControllerBaseAddress + DAC960_GEM_CommandStatusOffset + 2);
-}
-
-static inline bool
-DAC960_GEM_ReadErrorStatus(void __iomem *ControllerBaseAddress,
-			  unsigned char *ErrorStatus,
-			  unsigned char *Parameter0,
-			  unsigned char *Parameter1)
-{
-  DAC960_GEM_ErrorStatusRegister_T ErrorStatusRegister;
-  ErrorStatusRegister.All =
-    readl(ControllerBaseAddress + DAC960_GEM_ErrorStatusRegisterReadSetOffset);
-  if (!ErrorStatusRegister.Bits.ErrorStatusPending) return false;
-  ErrorStatusRegister.Bits.ErrorStatusPending = false;
-  *ErrorStatus = ErrorStatusRegister.All;
-  *Parameter0 =
-    readb(ControllerBaseAddress + DAC960_GEM_CommandMailboxBusAddressOffset + 0);
-  *Parameter1 =
-    readb(ControllerBaseAddress + DAC960_GEM_CommandMailboxBusAddressOffset + 1);
-  writel(0x03000000, ControllerBaseAddress +
-         DAC960_GEM_ErrorStatusRegisterClearOffset);
-  return true;
-}
-
-/*
-  Define the DAC960 BA Series Controller Interface Register Offsets.
-*/
-
-#define DAC960_BA_RegisterWindowSize		0x80
-
-typedef enum
-{
-  DAC960_BA_InboundDoorBellRegisterOffset =	0x60,
-  DAC960_BA_OutboundDoorBellRegisterOffset =	0x61,
-  DAC960_BA_InterruptStatusRegisterOffset =	0x30,
-  DAC960_BA_InterruptMaskRegisterOffset =	0x34,
-  DAC960_BA_CommandMailboxBusAddressOffset =	0x50,
-  DAC960_BA_CommandStatusOffset =		0x58,
-  DAC960_BA_ErrorStatusRegisterOffset =		0x63
-}
-DAC960_BA_RegisterOffsets_T;
-
-
-/*
-  Define the structure of the DAC960 BA Series Inbound Door Bell Register.
-*/
-
-typedef union DAC960_BA_InboundDoorBellRegister
-{
-  unsigned char All;
-  struct {
-    bool HardwareMailboxNewCommand:1;			/* Bit 0 */
-    bool AcknowledgeHardwareMailboxStatus:1;		/* Bit 1 */
-    bool GenerateInterrupt:1;				/* Bit 2 */
-    bool ControllerReset:1;				/* Bit 3 */
-    bool MemoryMailboxNewCommand:1;			/* Bit 4 */
-    unsigned char :3;					/* Bits 5-7 */
-  } Write;
-  struct {
-    bool HardwareMailboxEmpty:1;			/* Bit 0 */
-    bool InitializationNotInProgress:1;			/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Read;
-}
-DAC960_BA_InboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 BA Series Outbound Door Bell Register.
-*/
-
-typedef union DAC960_BA_OutboundDoorBellRegister
-{
-  unsigned char All;
-  struct {
-    bool AcknowledgeHardwareMailboxInterrupt:1;		/* Bit 0 */
-    bool AcknowledgeMemoryMailboxInterrupt:1;		/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Write;
-  struct {
-    bool HardwareMailboxStatusAvailable:1;		/* Bit 0 */
-    bool MemoryMailboxStatusAvailable:1;		/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Read;
-}
-DAC960_BA_OutboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 BA Series Interrupt Mask Register.
-*/
-
-typedef union DAC960_BA_InterruptMaskRegister
-{
-  unsigned char All;
-  struct {
-    unsigned int :2;					/* Bits 0-1 */
-    bool DisableInterrupts:1;				/* Bit 2 */
-    bool DisableInterruptsI2O:1;			/* Bit 3 */
-    unsigned int :4;					/* Bits 4-7 */
-  } Bits;
-}
-DAC960_BA_InterruptMaskRegister_T;
-
-
-/*
-  Define the structure of the DAC960 BA Series Error Status Register.
-*/
-
-typedef union DAC960_BA_ErrorStatusRegister
-{
-  unsigned char All;
-  struct {
-    unsigned int :2;					/* Bits 0-1 */
-    bool ErrorStatusPending:1;				/* Bit 2 */
-    unsigned int :5;					/* Bits 3-7 */
-  } Bits;
-}
-DAC960_BA_ErrorStatusRegister_T;
-
-
-/*
-  Define inline functions to provide an abstraction for reading and writing the
-  DAC960 BA Series Controller Interface Registers.
-*/
-
-static inline
-void DAC960_BA_HardwareMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.HardwareMailboxNewCommand = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_BA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_BA_AcknowledgeHardwareMailboxStatus(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.AcknowledgeHardwareMailboxStatus = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_BA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_BA_GenerateInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.GenerateInterrupt = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_BA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_BA_ControllerReset(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.ControllerReset = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_BA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_BA_MemoryMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.MemoryMailboxNewCommand = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_BA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_BA_HardwareMailboxFullP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_BA_InboundDoorBellRegisterOffset);
-  return !InboundDoorBellRegister.Read.HardwareMailboxEmpty;
-}
-
-static inline
-bool DAC960_BA_InitializationInProgressP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_BA_InboundDoorBellRegisterOffset);
-  return !InboundDoorBellRegister.Read.InitializationNotInProgress;
-}
-
-static inline
-void DAC960_BA_AcknowledgeHardwareMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_BA_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_BA_AcknowledgeMemoryMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_BA_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_BA_AcknowledgeInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_BA_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_BA_HardwareMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_BA_OutboundDoorBellRegisterOffset);
-  return OutboundDoorBellRegister.Read.HardwareMailboxStatusAvailable;
-}
-
-static inline
-bool DAC960_BA_MemoryMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_BA_OutboundDoorBellRegisterOffset);
-  return OutboundDoorBellRegister.Read.MemoryMailboxStatusAvailable;
-}
-
-static inline
-void DAC960_BA_EnableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0xFF;
-  InterruptMaskRegister.Bits.DisableInterrupts = false;
-  InterruptMaskRegister.Bits.DisableInterruptsI2O = true;
-  writeb(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_BA_InterruptMaskRegisterOffset);
-}
-
-static inline
-void DAC960_BA_DisableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0xFF;
-  InterruptMaskRegister.Bits.DisableInterrupts = true;
-  InterruptMaskRegister.Bits.DisableInterruptsI2O = true;
-  writeb(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_BA_InterruptMaskRegisterOffset);
-}
-
-static inline
-bool DAC960_BA_InterruptsEnabledP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_BA_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All =
-    readb(ControllerBaseAddress + DAC960_BA_InterruptMaskRegisterOffset);
-  return !InterruptMaskRegister.Bits.DisableInterrupts;
-}
-
-static inline
-void DAC960_BA_WriteCommandMailbox(DAC960_V2_CommandMailbox_T
-				     *MemoryCommandMailbox,
-				   DAC960_V2_CommandMailbox_T
-				     *CommandMailbox)
-{
-  memcpy(&MemoryCommandMailbox->Words[1], &CommandMailbox->Words[1],
-	 sizeof(DAC960_V2_CommandMailbox_T) - sizeof(unsigned int));
-  wmb();
-  MemoryCommandMailbox->Words[0] = CommandMailbox->Words[0];
-  mb();
-}
-
-
-static inline
-void DAC960_BA_WriteHardwareMailbox(void __iomem *ControllerBaseAddress,
-				    dma_addr_t CommandMailboxDMA)
-{
-	dma_addr_writeql(CommandMailboxDMA,
-		ControllerBaseAddress +
-		DAC960_BA_CommandMailboxBusAddressOffset);
-}
-
-static inline DAC960_V2_CommandIdentifier_T
-DAC960_BA_ReadCommandIdentifier(void __iomem *ControllerBaseAddress)
-{
-  return readw(ControllerBaseAddress + DAC960_BA_CommandStatusOffset);
-}
-
-static inline DAC960_V2_CommandStatus_T
-DAC960_BA_ReadCommandStatus(void __iomem *ControllerBaseAddress)
-{
-  return readw(ControllerBaseAddress + DAC960_BA_CommandStatusOffset + 2);
-}
-
-static inline bool
-DAC960_BA_ReadErrorStatus(void __iomem *ControllerBaseAddress,
-			  unsigned char *ErrorStatus,
-			  unsigned char *Parameter0,
-			  unsigned char *Parameter1)
-{
-  DAC960_BA_ErrorStatusRegister_T ErrorStatusRegister;
-  ErrorStatusRegister.All =
-    readb(ControllerBaseAddress + DAC960_BA_ErrorStatusRegisterOffset);
-  if (!ErrorStatusRegister.Bits.ErrorStatusPending) return false;
-  ErrorStatusRegister.Bits.ErrorStatusPending = false;
-  *ErrorStatus = ErrorStatusRegister.All;
-  *Parameter0 =
-    readb(ControllerBaseAddress + DAC960_BA_CommandMailboxBusAddressOffset + 0);
-  *Parameter1 =
-    readb(ControllerBaseAddress + DAC960_BA_CommandMailboxBusAddressOffset + 1);
-  writeb(0xFF, ControllerBaseAddress + DAC960_BA_ErrorStatusRegisterOffset);
-  return true;
-}
-
-
-/*
-  Define the DAC960 LP Series Controller Interface Register Offsets.
-*/
-
-#define DAC960_LP_RegisterWindowSize		0x80
-
-typedef enum
-{
-  DAC960_LP_InboundDoorBellRegisterOffset =	0x20,
-  DAC960_LP_OutboundDoorBellRegisterOffset =	0x2C,
-  DAC960_LP_InterruptStatusRegisterOffset =	0x30,
-  DAC960_LP_InterruptMaskRegisterOffset =	0x34,
-  DAC960_LP_CommandMailboxBusAddressOffset =	0x10,
-  DAC960_LP_CommandStatusOffset =		0x18,
-  DAC960_LP_ErrorStatusRegisterOffset =		0x2E
-}
-DAC960_LP_RegisterOffsets_T;
-
-
-/*
-  Define the structure of the DAC960 LP Series Inbound Door Bell Register.
-*/
-
-typedef union DAC960_LP_InboundDoorBellRegister
-{
-  unsigned char All;
-  struct {
-    bool HardwareMailboxNewCommand:1;			/* Bit 0 */
-    bool AcknowledgeHardwareMailboxStatus:1;		/* Bit 1 */
-    bool GenerateInterrupt:1;				/* Bit 2 */
-    bool ControllerReset:1;				/* Bit 3 */
-    bool MemoryMailboxNewCommand:1;			/* Bit 4 */
-    unsigned char :3;					/* Bits 5-7 */
-  } Write;
-  struct {
-    bool HardwareMailboxFull:1;				/* Bit 0 */
-    bool InitializationInProgress:1;			/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Read;
-}
-DAC960_LP_InboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 LP Series Outbound Door Bell Register.
-*/
-
-typedef union DAC960_LP_OutboundDoorBellRegister
-{
-  unsigned char All;
-  struct {
-    bool AcknowledgeHardwareMailboxInterrupt:1;		/* Bit 0 */
-    bool AcknowledgeMemoryMailboxInterrupt:1;		/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Write;
-  struct {
-    bool HardwareMailboxStatusAvailable:1;		/* Bit 0 */
-    bool MemoryMailboxStatusAvailable:1;		/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Read;
-}
-DAC960_LP_OutboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 LP Series Interrupt Mask Register.
-*/
-
-typedef union DAC960_LP_InterruptMaskRegister
-{
-  unsigned char All;
-  struct {
-    unsigned int :2;					/* Bits 0-1 */
-    bool DisableInterrupts:1;				/* Bit 2 */
-    unsigned int :5;					/* Bits 3-7 */
-  } Bits;
-}
-DAC960_LP_InterruptMaskRegister_T;
-
-
-/*
-  Define the structure of the DAC960 LP Series Error Status Register.
-*/
-
-typedef union DAC960_LP_ErrorStatusRegister
-{
-  unsigned char All;
-  struct {
-    unsigned int :2;					/* Bits 0-1 */
-    bool ErrorStatusPending:1;				/* Bit 2 */
-    unsigned int :5;					/* Bits 3-7 */
-  } Bits;
-}
-DAC960_LP_ErrorStatusRegister_T;
-
-
-/*
-  Define inline functions to provide an abstraction for reading and writing the
-  DAC960 LP Series Controller Interface Registers.
-*/
-
-static inline
-void DAC960_LP_HardwareMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.HardwareMailboxNewCommand = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LP_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LP_AcknowledgeHardwareMailboxStatus(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.AcknowledgeHardwareMailboxStatus = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LP_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LP_GenerateInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.GenerateInterrupt = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LP_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LP_ControllerReset(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.ControllerReset = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LP_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LP_MemoryMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.MemoryMailboxNewCommand = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LP_InboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_LP_HardwareMailboxFullP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_LP_InboundDoorBellRegisterOffset);
-  return InboundDoorBellRegister.Read.HardwareMailboxFull;
-}
-
-static inline
-bool DAC960_LP_InitializationInProgressP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_LP_InboundDoorBellRegisterOffset);
-  return InboundDoorBellRegister.Read.InitializationInProgress;
-}
-
-static inline
-void DAC960_LP_AcknowledgeHardwareMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LP_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LP_AcknowledgeMemoryMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LP_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LP_AcknowledgeInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LP_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_LP_HardwareMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_LP_OutboundDoorBellRegisterOffset);
-  return OutboundDoorBellRegister.Read.HardwareMailboxStatusAvailable;
-}
-
-static inline
-bool DAC960_LP_MemoryMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_LP_OutboundDoorBellRegisterOffset);
-  return OutboundDoorBellRegister.Read.MemoryMailboxStatusAvailable;
-}
-
-static inline
-void DAC960_LP_EnableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0xFF;
-  InterruptMaskRegister.Bits.DisableInterrupts = false;
-  writeb(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_LP_InterruptMaskRegisterOffset);
-}
-
-static inline
-void DAC960_LP_DisableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0xFF;
-  InterruptMaskRegister.Bits.DisableInterrupts = true;
-  writeb(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_LP_InterruptMaskRegisterOffset);
-}
-
-static inline
-bool DAC960_LP_InterruptsEnabledP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LP_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All =
-    readb(ControllerBaseAddress + DAC960_LP_InterruptMaskRegisterOffset);
-  return !InterruptMaskRegister.Bits.DisableInterrupts;
-}
-
-static inline
-void DAC960_LP_WriteCommandMailbox(DAC960_V2_CommandMailbox_T
-				     *MemoryCommandMailbox,
-				   DAC960_V2_CommandMailbox_T
-				     *CommandMailbox)
-{
-  memcpy(&MemoryCommandMailbox->Words[1], &CommandMailbox->Words[1],
-	 sizeof(DAC960_V2_CommandMailbox_T) - sizeof(unsigned int));
-  wmb();
-  MemoryCommandMailbox->Words[0] = CommandMailbox->Words[0];
-  mb();
-}
-
-static inline
-void DAC960_LP_WriteHardwareMailbox(void __iomem *ControllerBaseAddress,
-				    dma_addr_t CommandMailboxDMA)
-{
-	dma_addr_writeql(CommandMailboxDMA,
-		ControllerBaseAddress +
-		DAC960_LP_CommandMailboxBusAddressOffset);
-}
-
-static inline DAC960_V2_CommandIdentifier_T
-DAC960_LP_ReadCommandIdentifier(void __iomem *ControllerBaseAddress)
-{
-  return readw(ControllerBaseAddress + DAC960_LP_CommandStatusOffset);
-}
-
-static inline DAC960_V2_CommandStatus_T
-DAC960_LP_ReadCommandStatus(void __iomem *ControllerBaseAddress)
-{
-  return readw(ControllerBaseAddress + DAC960_LP_CommandStatusOffset + 2);
-}
-
-static inline bool
-DAC960_LP_ReadErrorStatus(void __iomem *ControllerBaseAddress,
-			  unsigned char *ErrorStatus,
-			  unsigned char *Parameter0,
-			  unsigned char *Parameter1)
-{
-  DAC960_LP_ErrorStatusRegister_T ErrorStatusRegister;
-  ErrorStatusRegister.All =
-    readb(ControllerBaseAddress + DAC960_LP_ErrorStatusRegisterOffset);
-  if (!ErrorStatusRegister.Bits.ErrorStatusPending) return false;
-  ErrorStatusRegister.Bits.ErrorStatusPending = false;
-  *ErrorStatus = ErrorStatusRegister.All;
-  *Parameter0 =
-    readb(ControllerBaseAddress + DAC960_LP_CommandMailboxBusAddressOffset + 0);
-  *Parameter1 =
-    readb(ControllerBaseAddress + DAC960_LP_CommandMailboxBusAddressOffset + 1);
-  writeb(0xFF, ControllerBaseAddress + DAC960_LP_ErrorStatusRegisterOffset);
-  return true;
-}
-
-
-/*
-  Define the DAC960 LA Series Controller Interface Register Offsets.
-*/
-
-#define DAC960_LA_RegisterWindowSize		0x80
-
-typedef enum
-{
-  DAC960_LA_InboundDoorBellRegisterOffset =	0x60,
-  DAC960_LA_OutboundDoorBellRegisterOffset =	0x61,
-  DAC960_LA_InterruptMaskRegisterOffset =	0x34,
-  DAC960_LA_CommandOpcodeRegisterOffset =	0x50,
-  DAC960_LA_CommandIdentifierRegisterOffset =	0x51,
-  DAC960_LA_MailboxRegister2Offset =		0x52,
-  DAC960_LA_MailboxRegister3Offset =		0x53,
-  DAC960_LA_MailboxRegister4Offset =		0x54,
-  DAC960_LA_MailboxRegister5Offset =		0x55,
-  DAC960_LA_MailboxRegister6Offset =		0x56,
-  DAC960_LA_MailboxRegister7Offset =		0x57,
-  DAC960_LA_MailboxRegister8Offset =		0x58,
-  DAC960_LA_MailboxRegister9Offset =		0x59,
-  DAC960_LA_MailboxRegister10Offset =		0x5A,
-  DAC960_LA_MailboxRegister11Offset =		0x5B,
-  DAC960_LA_MailboxRegister12Offset =		0x5C,
-  DAC960_LA_StatusCommandIdentifierRegOffset =	0x5D,
-  DAC960_LA_StatusRegisterOffset =		0x5E,
-  DAC960_LA_ErrorStatusRegisterOffset =		0x63
-}
-DAC960_LA_RegisterOffsets_T;
-
-
-/*
-  Define the structure of the DAC960 LA Series Inbound Door Bell Register.
-*/
-
-typedef union DAC960_LA_InboundDoorBellRegister
-{
-  unsigned char All;
-  struct {
-    bool HardwareMailboxNewCommand:1;			/* Bit 0 */
-    bool AcknowledgeHardwareMailboxStatus:1;		/* Bit 1 */
-    bool GenerateInterrupt:1;				/* Bit 2 */
-    bool ControllerReset:1;				/* Bit 3 */
-    bool MemoryMailboxNewCommand:1;			/* Bit 4 */
-    unsigned char :3;					/* Bits 5-7 */
-  } Write;
-  struct {
-    bool HardwareMailboxEmpty:1;			/* Bit 0 */
-    bool InitializationNotInProgress:1;		/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Read;
-}
-DAC960_LA_InboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 LA Series Outbound Door Bell Register.
-*/
-
-typedef union DAC960_LA_OutboundDoorBellRegister
-{
-  unsigned char All;
-  struct {
-    bool AcknowledgeHardwareMailboxInterrupt:1;		/* Bit 0 */
-    bool AcknowledgeMemoryMailboxInterrupt:1;		/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Write;
-  struct {
-    bool HardwareMailboxStatusAvailable:1;		/* Bit 0 */
-    bool MemoryMailboxStatusAvailable:1;		/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Read;
-}
-DAC960_LA_OutboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 LA Series Interrupt Mask Register.
-*/
-
-typedef union DAC960_LA_InterruptMaskRegister
-{
-  unsigned char All;
-  struct {
-    unsigned char :2;					/* Bits 0-1 */
-    bool DisableInterrupts:1;				/* Bit 2 */
-    unsigned char :5;					/* Bits 3-7 */
-  } Bits;
-}
-DAC960_LA_InterruptMaskRegister_T;
-
-
-/*
-  Define the structure of the DAC960 LA Series Error Status Register.
-*/
-
-typedef union DAC960_LA_ErrorStatusRegister
-{
-  unsigned char All;
-  struct {
-    unsigned int :2;					/* Bits 0-1 */
-    bool ErrorStatusPending:1;				/* Bit 2 */
-    unsigned int :5;					/* Bits 3-7 */
-  } Bits;
-}
-DAC960_LA_ErrorStatusRegister_T;
-
-
-/*
-  Define inline functions to provide an abstraction for reading and writing the
-  DAC960 LA Series Controller Interface Registers.
-*/
-
-static inline
-void DAC960_LA_HardwareMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.HardwareMailboxNewCommand = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LA_AcknowledgeHardwareMailboxStatus(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.AcknowledgeHardwareMailboxStatus = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LA_GenerateInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.GenerateInterrupt = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LA_ControllerReset(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.ControllerReset = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LA_MemoryMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.MemoryMailboxNewCommand = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LA_InboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_LA_HardwareMailboxFullP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_LA_InboundDoorBellRegisterOffset);
-  return !InboundDoorBellRegister.Read.HardwareMailboxEmpty;
-}
-
-static inline
-bool DAC960_LA_InitializationInProgressP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_LA_InboundDoorBellRegisterOffset);
-  return !InboundDoorBellRegister.Read.InitializationNotInProgress;
-}
-
-static inline
-void DAC960_LA_AcknowledgeHardwareMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LA_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LA_AcknowledgeMemoryMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LA_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_LA_AcknowledgeInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_LA_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_LA_HardwareMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_LA_OutboundDoorBellRegisterOffset);
-  return OutboundDoorBellRegister.Read.HardwareMailboxStatusAvailable;
-}
-
-static inline
-bool DAC960_LA_MemoryMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_LA_OutboundDoorBellRegisterOffset);
-  return OutboundDoorBellRegister.Read.MemoryMailboxStatusAvailable;
-}
-
-static inline
-void DAC960_LA_EnableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0xFF;
-  InterruptMaskRegister.Bits.DisableInterrupts = false;
-  writeb(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_LA_InterruptMaskRegisterOffset);
-}
-
-static inline
-void DAC960_LA_DisableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0xFF;
-  InterruptMaskRegister.Bits.DisableInterrupts = true;
-  writeb(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_LA_InterruptMaskRegisterOffset);
-}
-
-static inline
-bool DAC960_LA_InterruptsEnabledP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_LA_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All =
-    readb(ControllerBaseAddress + DAC960_LA_InterruptMaskRegisterOffset);
-  return !InterruptMaskRegister.Bits.DisableInterrupts;
-}
-
-static inline
-void DAC960_LA_WriteCommandMailbox(DAC960_V1_CommandMailbox_T
-				     *MemoryCommandMailbox,
-				   DAC960_V1_CommandMailbox_T
-				     *CommandMailbox)
-{
-  MemoryCommandMailbox->Words[1] = CommandMailbox->Words[1];
-  MemoryCommandMailbox->Words[2] = CommandMailbox->Words[2];
-  MemoryCommandMailbox->Words[3] = CommandMailbox->Words[3];
-  wmb();
-  MemoryCommandMailbox->Words[0] = CommandMailbox->Words[0];
-  mb();
-}
-
-static inline
-void DAC960_LA_WriteHardwareMailbox(void __iomem *ControllerBaseAddress,
-				    DAC960_V1_CommandMailbox_T *CommandMailbox)
-{
-  writel(CommandMailbox->Words[0],
-	 ControllerBaseAddress + DAC960_LA_CommandOpcodeRegisterOffset);
-  writel(CommandMailbox->Words[1],
-	 ControllerBaseAddress + DAC960_LA_MailboxRegister4Offset);
-  writel(CommandMailbox->Words[2],
-	 ControllerBaseAddress + DAC960_LA_MailboxRegister8Offset);
-  writeb(CommandMailbox->Bytes[12],
-	 ControllerBaseAddress + DAC960_LA_MailboxRegister12Offset);
-}
-
-static inline DAC960_V1_CommandIdentifier_T
-DAC960_LA_ReadStatusCommandIdentifier(void __iomem *ControllerBaseAddress)
-{
-  return readb(ControllerBaseAddress
-	       + DAC960_LA_StatusCommandIdentifierRegOffset);
-}
-
-static inline DAC960_V1_CommandStatus_T
-DAC960_LA_ReadStatusRegister(void __iomem *ControllerBaseAddress)
-{
-  return readw(ControllerBaseAddress + DAC960_LA_StatusRegisterOffset);
-}
-
-static inline bool
-DAC960_LA_ReadErrorStatus(void __iomem *ControllerBaseAddress,
-			  unsigned char *ErrorStatus,
-			  unsigned char *Parameter0,
-			  unsigned char *Parameter1)
-{
-  DAC960_LA_ErrorStatusRegister_T ErrorStatusRegister;
-  ErrorStatusRegister.All =
-    readb(ControllerBaseAddress + DAC960_LA_ErrorStatusRegisterOffset);
-  if (!ErrorStatusRegister.Bits.ErrorStatusPending) return false;
-  ErrorStatusRegister.Bits.ErrorStatusPending = false;
-  *ErrorStatus = ErrorStatusRegister.All;
-  *Parameter0 =
-    readb(ControllerBaseAddress + DAC960_LA_CommandOpcodeRegisterOffset);
-  *Parameter1 =
-    readb(ControllerBaseAddress + DAC960_LA_CommandIdentifierRegisterOffset);
-  writeb(0xFF, ControllerBaseAddress + DAC960_LA_ErrorStatusRegisterOffset);
-  return true;
-}
-
-/*
-  Define the DAC960 PG Series Controller Interface Register Offsets.
-*/
-
-#define DAC960_PG_RegisterWindowSize		0x2000
-
-typedef enum
-{
-  DAC960_PG_InboundDoorBellRegisterOffset =	0x0020,
-  DAC960_PG_OutboundDoorBellRegisterOffset =	0x002C,
-  DAC960_PG_InterruptMaskRegisterOffset =	0x0034,
-  DAC960_PG_CommandOpcodeRegisterOffset =	0x1000,
-  DAC960_PG_CommandIdentifierRegisterOffset =	0x1001,
-  DAC960_PG_MailboxRegister2Offset =		0x1002,
-  DAC960_PG_MailboxRegister3Offset =		0x1003,
-  DAC960_PG_MailboxRegister4Offset =		0x1004,
-  DAC960_PG_MailboxRegister5Offset =		0x1005,
-  DAC960_PG_MailboxRegister6Offset =		0x1006,
-  DAC960_PG_MailboxRegister7Offset =		0x1007,
-  DAC960_PG_MailboxRegister8Offset =		0x1008,
-  DAC960_PG_MailboxRegister9Offset =		0x1009,
-  DAC960_PG_MailboxRegister10Offset =		0x100A,
-  DAC960_PG_MailboxRegister11Offset =		0x100B,
-  DAC960_PG_MailboxRegister12Offset =		0x100C,
-  DAC960_PG_StatusCommandIdentifierRegOffset =	0x1018,
-  DAC960_PG_StatusRegisterOffset =		0x101A,
-  DAC960_PG_ErrorStatusRegisterOffset =		0x103F
-}
-DAC960_PG_RegisterOffsets_T;
-
-
-/*
-  Define the structure of the DAC960 PG Series Inbound Door Bell Register.
-*/
-
-typedef union DAC960_PG_InboundDoorBellRegister
-{
-  unsigned int All;
-  struct {
-    bool HardwareMailboxNewCommand:1;			/* Bit 0 */
-    bool AcknowledgeHardwareMailboxStatus:1;		/* Bit 1 */
-    bool GenerateInterrupt:1;				/* Bit 2 */
-    bool ControllerReset:1;				/* Bit 3 */
-    bool MemoryMailboxNewCommand:1;			/* Bit 4 */
-    unsigned int :27;					/* Bits 5-31 */
-  } Write;
-  struct {
-    bool HardwareMailboxFull:1;				/* Bit 0 */
-    bool InitializationInProgress:1;			/* Bit 1 */
-    unsigned int :30;					/* Bits 2-31 */
-  } Read;
-}
-DAC960_PG_InboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 PG Series Outbound Door Bell Register.
-*/
-
-typedef union DAC960_PG_OutboundDoorBellRegister
-{
-  unsigned int All;
-  struct {
-    bool AcknowledgeHardwareMailboxInterrupt:1;		/* Bit 0 */
-    bool AcknowledgeMemoryMailboxInterrupt:1;		/* Bit 1 */
-    unsigned int :30;					/* Bits 2-31 */
-  } Write;
-  struct {
-    bool HardwareMailboxStatusAvailable:1;		/* Bit 0 */
-    bool MemoryMailboxStatusAvailable:1;		/* Bit 1 */
-    unsigned int :30;					/* Bits 2-31 */
-  } Read;
-}
-DAC960_PG_OutboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 PG Series Interrupt Mask Register.
-*/
-
-typedef union DAC960_PG_InterruptMaskRegister
-{
-  unsigned int All;
-  struct {
-    unsigned int MessageUnitInterruptMask1:2;		/* Bits 0-1 */
-    bool DisableInterrupts:1;				/* Bit 2 */
-    unsigned int MessageUnitInterruptMask2:5;		/* Bits 3-7 */
-    unsigned int Reserved0:24;				/* Bits 8-31 */
-  } Bits;
-}
-DAC960_PG_InterruptMaskRegister_T;
-
-
-/*
-  Define the structure of the DAC960 PG Series Error Status Register.
-*/
-
-typedef union DAC960_PG_ErrorStatusRegister
-{
-  unsigned char All;
-  struct {
-    unsigned int :2;					/* Bits 0-1 */
-    bool ErrorStatusPending:1;				/* Bit 2 */
-    unsigned int :5;					/* Bits 3-7 */
-  } Bits;
-}
-DAC960_PG_ErrorStatusRegister_T;
-
-
-/*
-  Define inline functions to provide an abstraction for reading and writing the
-  DAC960 PG Series Controller Interface Registers.
-*/
-
-static inline
-void DAC960_PG_HardwareMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.HardwareMailboxNewCommand = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PG_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_PG_AcknowledgeHardwareMailboxStatus(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.AcknowledgeHardwareMailboxStatus = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PG_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_PG_GenerateInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.GenerateInterrupt = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PG_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_PG_ControllerReset(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.ControllerReset = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PG_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_PG_MemoryMailboxNewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.MemoryMailboxNewCommand = true;
-  writel(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PG_InboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_PG_HardwareMailboxFullP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readl(ControllerBaseAddress + DAC960_PG_InboundDoorBellRegisterOffset);
-  return InboundDoorBellRegister.Read.HardwareMailboxFull;
-}
-
-static inline
-bool DAC960_PG_InitializationInProgressP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readl(ControllerBaseAddress + DAC960_PG_InboundDoorBellRegisterOffset);
-  return InboundDoorBellRegister.Read.InitializationInProgress;
-}
-
-static inline
-void DAC960_PG_AcknowledgeHardwareMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  writel(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PG_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_PG_AcknowledgeMemoryMailboxInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writel(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PG_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_PG_AcknowledgeInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeHardwareMailboxInterrupt = true;
-  OutboundDoorBellRegister.Write.AcknowledgeMemoryMailboxInterrupt = true;
-  writel(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PG_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_PG_HardwareMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readl(ControllerBaseAddress + DAC960_PG_OutboundDoorBellRegisterOffset);
-  return OutboundDoorBellRegister.Read.HardwareMailboxStatusAvailable;
-}
-
-static inline
-bool DAC960_PG_MemoryMailboxStatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readl(ControllerBaseAddress + DAC960_PG_OutboundDoorBellRegisterOffset);
-  return OutboundDoorBellRegister.Read.MemoryMailboxStatusAvailable;
-}
-
-static inline
-void DAC960_PG_EnableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0;
-  InterruptMaskRegister.Bits.MessageUnitInterruptMask1 = 0x3;
-  InterruptMaskRegister.Bits.DisableInterrupts = false;
-  InterruptMaskRegister.Bits.MessageUnitInterruptMask2 = 0x1F;
-  writel(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_PG_InterruptMaskRegisterOffset);
-}
-
-static inline
-void DAC960_PG_DisableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All = 0;
-  InterruptMaskRegister.Bits.MessageUnitInterruptMask1 = 0x3;
-  InterruptMaskRegister.Bits.DisableInterrupts = true;
-  InterruptMaskRegister.Bits.MessageUnitInterruptMask2 = 0x1F;
-  writel(InterruptMaskRegister.All,
-	 ControllerBaseAddress + DAC960_PG_InterruptMaskRegisterOffset);
-}
-
-static inline
-bool DAC960_PG_InterruptsEnabledP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PG_InterruptMaskRegister_T InterruptMaskRegister;
-  InterruptMaskRegister.All =
-    readl(ControllerBaseAddress + DAC960_PG_InterruptMaskRegisterOffset);
-  return !InterruptMaskRegister.Bits.DisableInterrupts;
-}
-
-static inline
-void DAC960_PG_WriteCommandMailbox(DAC960_V1_CommandMailbox_T
-				     *MemoryCommandMailbox,
-				   DAC960_V1_CommandMailbox_T
-				     *CommandMailbox)
-{
-  MemoryCommandMailbox->Words[1] = CommandMailbox->Words[1];
-  MemoryCommandMailbox->Words[2] = CommandMailbox->Words[2];
-  MemoryCommandMailbox->Words[3] = CommandMailbox->Words[3];
-  wmb();
-  MemoryCommandMailbox->Words[0] = CommandMailbox->Words[0];
-  mb();
-}
-
-static inline
-void DAC960_PG_WriteHardwareMailbox(void __iomem *ControllerBaseAddress,
-				    DAC960_V1_CommandMailbox_T *CommandMailbox)
-{
-  writel(CommandMailbox->Words[0],
-	 ControllerBaseAddress + DAC960_PG_CommandOpcodeRegisterOffset);
-  writel(CommandMailbox->Words[1],
-	 ControllerBaseAddress + DAC960_PG_MailboxRegister4Offset);
-  writel(CommandMailbox->Words[2],
-	 ControllerBaseAddress + DAC960_PG_MailboxRegister8Offset);
-  writeb(CommandMailbox->Bytes[12],
-	 ControllerBaseAddress + DAC960_PG_MailboxRegister12Offset);
-}
-
-static inline DAC960_V1_CommandIdentifier_T
-DAC960_PG_ReadStatusCommandIdentifier(void __iomem *ControllerBaseAddress)
-{
-  return readb(ControllerBaseAddress
-	       + DAC960_PG_StatusCommandIdentifierRegOffset);
-}
-
-static inline DAC960_V1_CommandStatus_T
-DAC960_PG_ReadStatusRegister(void __iomem *ControllerBaseAddress)
-{
-  return readw(ControllerBaseAddress + DAC960_PG_StatusRegisterOffset);
-}
-
-static inline bool
-DAC960_PG_ReadErrorStatus(void __iomem *ControllerBaseAddress,
-			  unsigned char *ErrorStatus,
-			  unsigned char *Parameter0,
-			  unsigned char *Parameter1)
-{
-  DAC960_PG_ErrorStatusRegister_T ErrorStatusRegister;
-  ErrorStatusRegister.All =
-    readb(ControllerBaseAddress + DAC960_PG_ErrorStatusRegisterOffset);
-  if (!ErrorStatusRegister.Bits.ErrorStatusPending) return false;
-  ErrorStatusRegister.Bits.ErrorStatusPending = false;
-  *ErrorStatus = ErrorStatusRegister.All;
-  *Parameter0 =
-    readb(ControllerBaseAddress + DAC960_PG_CommandOpcodeRegisterOffset);
-  *Parameter1 =
-    readb(ControllerBaseAddress + DAC960_PG_CommandIdentifierRegisterOffset);
-  writeb(0, ControllerBaseAddress + DAC960_PG_ErrorStatusRegisterOffset);
-  return true;
-}
-
-/*
-  Define the DAC960 PD Series Controller Interface Register Offsets.
-*/
-
-#define DAC960_PD_RegisterWindowSize		0x80
-
-typedef enum
-{
-  DAC960_PD_CommandOpcodeRegisterOffset =	0x00,
-  DAC960_PD_CommandIdentifierRegisterOffset =	0x01,
-  DAC960_PD_MailboxRegister2Offset =		0x02,
-  DAC960_PD_MailboxRegister3Offset =		0x03,
-  DAC960_PD_MailboxRegister4Offset =		0x04,
-  DAC960_PD_MailboxRegister5Offset =		0x05,
-  DAC960_PD_MailboxRegister6Offset =		0x06,
-  DAC960_PD_MailboxRegister7Offset =		0x07,
-  DAC960_PD_MailboxRegister8Offset =		0x08,
-  DAC960_PD_MailboxRegister9Offset =		0x09,
-  DAC960_PD_MailboxRegister10Offset =		0x0A,
-  DAC960_PD_MailboxRegister11Offset =		0x0B,
-  DAC960_PD_MailboxRegister12Offset =		0x0C,
-  DAC960_PD_StatusCommandIdentifierRegOffset =	0x0D,
-  DAC960_PD_StatusRegisterOffset =		0x0E,
-  DAC960_PD_ErrorStatusRegisterOffset =		0x3F,
-  DAC960_PD_InboundDoorBellRegisterOffset =	0x40,
-  DAC960_PD_OutboundDoorBellRegisterOffset =	0x41,
-  DAC960_PD_InterruptEnableRegisterOffset =	0x43
-}
-DAC960_PD_RegisterOffsets_T;
-
-
-/*
-  Define the structure of the DAC960 PD Series Inbound Door Bell Register.
-*/
-
-typedef union DAC960_PD_InboundDoorBellRegister
-{
-  unsigned char All;
-  struct {
-    bool NewCommand:1;					/* Bit 0 */
-    bool AcknowledgeStatus:1;				/* Bit 1 */
-    bool GenerateInterrupt:1;				/* Bit 2 */
-    bool ControllerReset:1;				/* Bit 3 */
-    unsigned char :4;					/* Bits 4-7 */
-  } Write;
-  struct {
-    bool MailboxFull:1;					/* Bit 0 */
-    bool InitializationInProgress:1;			/* Bit 1 */
-    unsigned char :6;					/* Bits 2-7 */
-  } Read;
-}
-DAC960_PD_InboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 PD Series Outbound Door Bell Register.
-*/
-
-typedef union DAC960_PD_OutboundDoorBellRegister
-{
-  unsigned char All;
-  struct {
-    bool AcknowledgeInterrupt:1;			/* Bit 0 */
-    unsigned char :7;					/* Bits 1-7 */
-  } Write;
-  struct {
-    bool StatusAvailable:1;				/* Bit 0 */
-    unsigned char :7;					/* Bits 1-7 */
-  } Read;
-}
-DAC960_PD_OutboundDoorBellRegister_T;
-
-
-/*
-  Define the structure of the DAC960 PD Series Interrupt Enable Register.
-*/
-
-typedef union DAC960_PD_InterruptEnableRegister
-{
-  unsigned char All;
-  struct {
-    bool EnableInterrupts:1;				/* Bit 0 */
-    unsigned char :7;					/* Bits 1-7 */
-  } Bits;
-}
-DAC960_PD_InterruptEnableRegister_T;
-
-
-/*
-  Define the structure of the DAC960 PD Series Error Status Register.
-*/
-
-typedef union DAC960_PD_ErrorStatusRegister
-{
-  unsigned char All;
-  struct {
-    unsigned int :2;					/* Bits 0-1 */
-    bool ErrorStatusPending:1;				/* Bit 2 */
-    unsigned int :5;					/* Bits 3-7 */
-  } Bits;
-}
-DAC960_PD_ErrorStatusRegister_T;
-
-
-/*
-  Define inline functions to provide an abstraction for reading and writing the
-  DAC960 PD Series Controller Interface Registers.
-*/
-
-static inline
-void DAC960_PD_NewCommand(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.NewCommand = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PD_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_PD_AcknowledgeStatus(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.AcknowledgeStatus = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PD_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_PD_GenerateInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.GenerateInterrupt = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PD_InboundDoorBellRegisterOffset);
-}
-
-static inline
-void DAC960_PD_ControllerReset(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All = 0;
-  InboundDoorBellRegister.Write.ControllerReset = true;
-  writeb(InboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PD_InboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_PD_MailboxFullP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_PD_InboundDoorBellRegisterOffset);
-  return InboundDoorBellRegister.Read.MailboxFull;
-}
-
-static inline
-bool DAC960_PD_InitializationInProgressP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_InboundDoorBellRegister_T InboundDoorBellRegister;
-  InboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_PD_InboundDoorBellRegisterOffset);
-  return InboundDoorBellRegister.Read.InitializationInProgress;
-}
-
-static inline
-void DAC960_PD_AcknowledgeInterrupt(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All = 0;
-  OutboundDoorBellRegister.Write.AcknowledgeInterrupt = true;
-  writeb(OutboundDoorBellRegister.All,
-	 ControllerBaseAddress + DAC960_PD_OutboundDoorBellRegisterOffset);
-}
-
-static inline
-bool DAC960_PD_StatusAvailableP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_OutboundDoorBellRegister_T OutboundDoorBellRegister;
-  OutboundDoorBellRegister.All =
-    readb(ControllerBaseAddress + DAC960_PD_OutboundDoorBellRegisterOffset);
-  return OutboundDoorBellRegister.Read.StatusAvailable;
-}
-
-static inline
-void DAC960_PD_EnableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_InterruptEnableRegister_T InterruptEnableRegister;
-  InterruptEnableRegister.All = 0;
-  InterruptEnableRegister.Bits.EnableInterrupts = true;
-  writeb(InterruptEnableRegister.All,
-	 ControllerBaseAddress + DAC960_PD_InterruptEnableRegisterOffset);
-}
-
-static inline
-void DAC960_PD_DisableInterrupts(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_InterruptEnableRegister_T InterruptEnableRegister;
-  InterruptEnableRegister.All = 0;
-  InterruptEnableRegister.Bits.EnableInterrupts = false;
-  writeb(InterruptEnableRegister.All,
-	 ControllerBaseAddress + DAC960_PD_InterruptEnableRegisterOffset);
-}
-
-static inline
-bool DAC960_PD_InterruptsEnabledP(void __iomem *ControllerBaseAddress)
-{
-  DAC960_PD_InterruptEnableRegister_T InterruptEnableRegister;
-  InterruptEnableRegister.All =
-    readb(ControllerBaseAddress + DAC960_PD_InterruptEnableRegisterOffset);
-  return InterruptEnableRegister.Bits.EnableInterrupts;
-}
-
-static inline
-void DAC960_PD_WriteCommandMailbox(void __iomem *ControllerBaseAddress,
-				   DAC960_V1_CommandMailbox_T *CommandMailbox)
-{
-  writel(CommandMailbox->Words[0],
-	 ControllerBaseAddress + DAC960_PD_CommandOpcodeRegisterOffset);
-  writel(CommandMailbox->Words[1],
-	 ControllerBaseAddress + DAC960_PD_MailboxRegister4Offset);
-  writel(CommandMailbox->Words[2],
-	 ControllerBaseAddress + DAC960_PD_MailboxRegister8Offset);
-  writeb(CommandMailbox->Bytes[12],
-	 ControllerBaseAddress + DAC960_PD_MailboxRegister12Offset);
-}
-
-static inline DAC960_V1_CommandIdentifier_T
-DAC960_PD_ReadStatusCommandIdentifier(void __iomem *ControllerBaseAddress)
-{
-  return readb(ControllerBaseAddress
-	       + DAC960_PD_StatusCommandIdentifierRegOffset);
-}
-
-static inline DAC960_V1_CommandStatus_T
-DAC960_PD_ReadStatusRegister(void __iomem *ControllerBaseAddress)
-{
-  return readw(ControllerBaseAddress + DAC960_PD_StatusRegisterOffset);
-}
-
-static inline bool
-DAC960_PD_ReadErrorStatus(void __iomem *ControllerBaseAddress,
-			  unsigned char *ErrorStatus,
-			  unsigned char *Parameter0,
-			  unsigned char *Parameter1)
-{
-  DAC960_PD_ErrorStatusRegister_T ErrorStatusRegister;
-  ErrorStatusRegister.All =
-    readb(ControllerBaseAddress + DAC960_PD_ErrorStatusRegisterOffset);
-  if (!ErrorStatusRegister.Bits.ErrorStatusPending) return false;
-  ErrorStatusRegister.Bits.ErrorStatusPending = false;
-  *ErrorStatus = ErrorStatusRegister.All;
-  *Parameter0 =
-    readb(ControllerBaseAddress + DAC960_PD_CommandOpcodeRegisterOffset);
-  *Parameter1 =
-    readb(ControllerBaseAddress + DAC960_PD_CommandIdentifierRegisterOffset);
-  writeb(0, ControllerBaseAddress + DAC960_PD_ErrorStatusRegisterOffset);
-  return true;
-}
-
-static inline void DAC960_P_To_PD_TranslateEnquiry(void *Enquiry)
-{
-  memcpy(Enquiry + 132, Enquiry + 36, 64);
-  memset(Enquiry + 36, 0, 96);
-}
-
-static inline void DAC960_P_To_PD_TranslateDeviceState(void *DeviceState)
-{
-  memcpy(DeviceState + 2, DeviceState + 3, 1);
-  memmove(DeviceState + 4, DeviceState + 5, 2);
-  memmove(DeviceState + 6, DeviceState + 8, 4);
-}
-
-static inline
-void DAC960_PD_To_P_TranslateReadWriteCommand(DAC960_V1_CommandMailbox_T
-					      *CommandMailbox)
-{
-  int LogicalDriveNumber = CommandMailbox->Type5.LD.LogicalDriveNumber;
-  CommandMailbox->Bytes[3] &= 0x7;
-  CommandMailbox->Bytes[3] |= CommandMailbox->Bytes[7] << 6;
-  CommandMailbox->Bytes[7] = LogicalDriveNumber;
-}
-
-static inline
-void DAC960_P_To_PD_TranslateReadWriteCommand(DAC960_V1_CommandMailbox_T
-					      *CommandMailbox)
-{
-  int LogicalDriveNumber = CommandMailbox->Bytes[7];
-  CommandMailbox->Bytes[7] = CommandMailbox->Bytes[3] >> 6;
-  CommandMailbox->Bytes[3] &= 0x7;
-  CommandMailbox->Bytes[3] |= LogicalDriveNumber << 3;
-}
-
-
-/*
-  Define prototypes for the forward referenced DAC960 Driver Internal Functions.
-*/
-
-static void DAC960_FinalizeController(DAC960_Controller_T *);
-static void DAC960_V1_QueueReadWriteCommand(DAC960_Command_T *);
-static void DAC960_V2_QueueReadWriteCommand(DAC960_Command_T *); 
-static void DAC960_RequestFunction(struct request_queue *);
-static irqreturn_t DAC960_BA_InterruptHandler(int, void *);
-static irqreturn_t DAC960_LP_InterruptHandler(int, void *);
-static irqreturn_t DAC960_LA_InterruptHandler(int, void *);
-static irqreturn_t DAC960_PG_InterruptHandler(int, void *);
-static irqreturn_t DAC960_PD_InterruptHandler(int, void *);
-static irqreturn_t DAC960_P_InterruptHandler(int, void *);
-static void DAC960_V1_QueueMonitoringCommand(DAC960_Command_T *);
-static void DAC960_V2_QueueMonitoringCommand(DAC960_Command_T *);
-static void DAC960_MonitoringTimerFunction(struct timer_list *);
-static void DAC960_Message(DAC960_MessageLevel_T, unsigned char *,
-			   DAC960_Controller_T *, ...);
-static void DAC960_CreateProcEntries(DAC960_Controller_T *);
-static void DAC960_DestroyProcEntries(DAC960_Controller_T *);
-
-#endif /* DAC960_DriverVersion */

drivers/block/Kconfig

@@ -121,18 +121,6 @@ source "drivers/block/mtip32xx/Kconfig"
 
 source "drivers/block/zram/Kconfig"
 
-config BLK_DEV_DAC960
-	tristate "Mylex DAC960/DAC1100 PCI RAID Controller support"
-	depends on PCI
-	help
-	  This driver adds support for the Mylex DAC960, AcceleRAID, and
-	  eXtremeRAID PCI RAID controllers.  See the file
-	  <file:Documentation/blockdev/README.DAC960> for further information
-	  about this driver.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called DAC960.
-
 config BLK_DEV_UMEM
 	tristate "Micro Memory MM5415 Battery Backed RAM support"
 	depends on PCI
@@ -461,7 +449,6 @@ config BLK_DEV_RBD
 	select LIBCRC32C
 	select CRYPTO_AES
 	select CRYPTO
-	default n
 	help
 	  Say Y here if you want include the Rados block device, which stripes
 	  a block device over objects stored in the Ceph distributed object

drivers/block/Makefile

@@ -16,7 +16,6 @@ obj-$(CONFIG_ATARI_FLOPPY)	+= ataflop.o
 obj-$(CONFIG_AMIGA_Z2RAM)	+= z2ram.o
 obj-$(CONFIG_BLK_DEV_RAM)	+= brd.o
 obj-$(CONFIG_BLK_DEV_LOOP)	+= loop.o
-obj-$(CONFIG_BLK_DEV_DAC960)	+= DAC960.o
 obj-$(CONFIG_XILINX_SYSACE)	+= xsysace.o
 obj-$(CONFIG_CDROM_PKTCDVD)	+= pktcdvd.o
 obj-$(CONFIG_SUNVDC)		+= sunvdc.o

drivers/block/amiflop.c

@@ -61,10 +61,8 @@
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/mutex.h>
-#include <linux/amifdreg.h>
-#include <linux/amifd.h>
 #include <linux/fs.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/elevator.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
@@ -86,6 +84,126 @@
  *  Defines
  */
 
+/*
+ * CIAAPRA bits (read only)
+ */
+
+#define DSKRDY      (0x1<<5)        /* disk ready when low */
+#define DSKTRACK0   (0x1<<4)        /* head at track zero when low */
+#define DSKPROT     (0x1<<3)        /* disk protected when low */
+#define DSKCHANGE   (0x1<<2)        /* low when disk removed */
+
+/*
+ * CIAAPRB bits (read/write)
+ */
+
+#define DSKMOTOR    (0x1<<7)        /* motor on when low */
+#define DSKSEL3     (0x1<<6)        /* select drive 3 when low */
+#define DSKSEL2     (0x1<<5)        /* select drive 2 when low */
+#define DSKSEL1     (0x1<<4)        /* select drive 1 when low */
+#define DSKSEL0     (0x1<<3)        /* select drive 0 when low */
+#define DSKSIDE     (0x1<<2)        /* side selection: 0 = upper, 1 = lower */
+#define DSKDIREC    (0x1<<1)        /* step direction: 0=in, 1=out (to trk 0) */
+#define DSKSTEP     (0x1)           /* pulse low to step head 1 track */
+
+/*
+ * DSKBYTR bits (read only)
+ */
+
+#define DSKBYT      (1<<15)         /* register contains valid byte when set */
+#define DMAON       (1<<14)         /* disk DMA enabled */
+#define DISKWRITE   (1<<13)         /* disk write bit in DSKLEN enabled */
+#define WORDEQUAL   (1<<12)         /* DSKSYNC register match when true */
+/* bits 7-0 are data */
+
+/*
+ * ADKCON/ADKCONR bits
+ */
+
+#ifndef SETCLR
+#define ADK_SETCLR      (1<<15)     /* control bit */
+#endif
+#define ADK_PRECOMP1    (1<<14)     /* precompensation selection */
+#define ADK_PRECOMP0    (1<<13)     /* 00=none, 01=140ns, 10=280ns, 11=500ns */
+#define ADK_MFMPREC     (1<<12)     /* 0=GCR precomp., 1=MFM precomp. */
+#define ADK_WORDSYNC    (1<<10)     /* enable DSKSYNC auto DMA */
+#define ADK_MSBSYNC     (1<<9)      /* when 1, enable sync on MSbit (for GCR) */
+#define ADK_FAST        (1<<8)      /* bit cell: 0=2us (GCR), 1=1us (MFM) */
+
+/*
+ * DSKLEN bits
+ */
+
+#define DSKLEN_DMAEN    (1<<15)
+#define DSKLEN_WRITE    (1<<14)
+
+/*
+ * INTENA/INTREQ bits
+ */
+
+#define DSKINDEX    (0x1<<4)        /* DSKINDEX bit */
+
+/*
+ * Misc
+ */
+
+#define MFM_SYNC    0x4489          /* standard MFM sync value */
+
+/* Values for FD_COMMAND */
+#define FD_RECALIBRATE		0x07	/* move to track 0 */
+#define FD_SEEK			0x0F	/* seek track */
+#define FD_READ			0xE6	/* read with MT, MFM, SKip deleted */
+#define FD_WRITE		0xC5	/* write with MT, MFM */
+#define FD_SENSEI		0x08	/* Sense Interrupt Status */
+#define FD_SPECIFY		0x03	/* specify HUT etc */
+#define FD_FORMAT		0x4D	/* format one track */
+#define FD_VERSION		0x10	/* get version code */
+#define FD_CONFIGURE		0x13	/* configure FIFO operation */
+#define FD_PERPENDICULAR	0x12	/* perpendicular r/w mode */
+
+#define FD_MAX_UNITS    4	/* Max. Number of drives */
+#define FLOPPY_MAX_SECTORS	22	/* Max. Number of sectors per track */
+
+struct fd_data_type {
+	char *name;		/* description of data type */
+	int sects;		/* sectors per track */
+	int (*read_fkt)(int);	/* read whole track */
+	void (*write_fkt)(int);	/* write whole track */
+};
+
+struct fd_drive_type {
+	unsigned long code;		/* code returned from drive */
+	char *name;			/* description of drive */
+	unsigned int tracks;	/* number of tracks */
+	unsigned int heads;		/* number of heads */
+	unsigned int read_size;	/* raw read size for one track */
+	unsigned int write_size;	/* raw write size for one track */
+	unsigned int sect_mult;	/* sectors and gap multiplier (HD = 2) */
+	unsigned int precomp1;	/* start track for precomp 1 */
+	unsigned int precomp2;	/* start track for precomp 2 */
+	unsigned int step_delay;	/* time (in ms) for delay after step */
+	unsigned int settle_time;	/* time to settle after dir change */
+	unsigned int side_time;	/* time needed to change sides */
+};
+
+struct amiga_floppy_struct {
+	struct fd_drive_type *type;	/* type of floppy for this unit */
+	struct fd_data_type *dtype;	/* type of floppy for this unit */
+	int track;			/* current track (-1 == unknown) */
+	unsigned char *trackbuf;	/* current track (kmaloc()'d */
+
+	int blocks;			/* total # blocks on disk */
+
+	int changed;			/* true when not known */
+	int disk;			/* disk in drive (-1 == unknown) */
+	int motor;			/* true when motor is at speed */
+	int busy;			/* true when drive is active */
+	int dirty;			/* true when trackbuf is not on disk */
+	int status;			/* current error code for unit */
+	struct gendisk *gendisk;
+	struct blk_mq_tag_set tag_set;
+};
+
 /*
  *  Error codes
  */
@@ -164,7 +282,6 @@ static volatile int selected = -1;	/* currently selected drive */
 static int writepending;
 static int writefromint;
 static char *raw_buf;
-static int fdc_queue;
 
 static DEFINE_SPINLOCK(amiflop_lock);
 
@@ -1337,76 +1454,20 @@ static int get_track(int drive, int track)
 	return -1;
 }
 
-/*
- * Round-robin between our available drives, doing one request from each
- */
-static struct request *set_next_request(void)
-{
-	struct request_queue *q;
-	int cnt = FD_MAX_UNITS;
-	struct request *rq = NULL;
-
-	/* Find next queue we can dispatch from */
-	fdc_queue = fdc_queue + 1;
-	if (fdc_queue == FD_MAX_UNITS)
-		fdc_queue = 0;
-
-	for(cnt = FD_MAX_UNITS; cnt > 0; cnt--) {
-
-		if (unit[fdc_queue].type->code == FD_NODRIVE) {
-			if (++fdc_queue == FD_MAX_UNITS)
-				fdc_queue = 0;
-			continue;
-		}
-
-		q = unit[fdc_queue].gendisk->queue;
-		if (q) {
-			rq = blk_fetch_request(q);
-			if (rq)
-				break;
-		}
-
-		if (++fdc_queue == FD_MAX_UNITS)
-			fdc_queue = 0;
-	}
-
-	return rq;
-}
-
-static void redo_fd_request(void)
+static blk_status_t amiflop_rw_cur_segment(struct amiga_floppy_struct *floppy,
+					   struct request *rq)
 {
-	struct request *rq;
+	int drive = floppy - unit;
 	unsigned int cnt, block, track, sector;
-	int drive;
-	struct amiga_floppy_struct *floppy;
 	char *data;
-	unsigned long flags;
-	blk_status_t err;
-
-next_req:
-	rq = set_next_request();
-	if (!rq) {
-		/* Nothing left to do */
-		return;
-	}
-
-	floppy = rq->rq_disk->private_data;
-	drive = floppy - unit;
 
-next_segment:
-	/* Here someone could investigate to be more efficient */
-	for (cnt = 0, err = BLK_STS_OK; cnt < blk_rq_cur_sectors(rq); cnt++) {
+	for (cnt = 0; cnt < blk_rq_cur_sectors(rq); cnt++) {
 #ifdef DEBUG
 		printk("fd: sector %ld + %d requested for %s\n",
 		       blk_rq_pos(rq), cnt,
 		       (rq_data_dir(rq) == READ) ? "read" : "write");
 #endif
 		block = blk_rq_pos(rq) + cnt;
-		if ((int)block > floppy->blocks) {
-			err = BLK_STS_IOERR;
-			break;
-		}
-
 		track = block / (floppy->dtype->sects * floppy->type->sect_mult);
 		sector = block % (floppy->dtype->sects * floppy->type->sect_mult);
 		data = bio_data(rq->bio) + 512 * cnt;
@@ -1415,10 +1476,8 @@ next_segment:
 		       "0x%08lx\n", track, sector, data);
 #endif
 
-		if (get_track(drive, track) == -1) {
-			err = BLK_STS_IOERR;
-			break;
-		}
+		if (get_track(drive, track) == -1)
+			return BLK_STS_IOERR;
 
 		if (rq_data_dir(rq) == READ) {
 			memcpy(data, floppy->trackbuf + sector * 512, 512);
@@ -1426,31 +1485,40 @@ next_segment:
 			memcpy(floppy->trackbuf + sector * 512, data, 512);
 
 			/* keep the drive spinning while writes are scheduled */
-			if (!fd_motor_on(drive)) {
-				err = BLK_STS_IOERR;
-				break;
-			}
+			if (!fd_motor_on(drive))
+				return BLK_STS_IOERR;
 			/*
 			 * setup a callback to write the track buffer
 			 * after a short (1 tick) delay.
 			 */
-			local_irq_save(flags);
-
 			floppy->dirty = 1;
 		        /* reset the timer */
 			mod_timer (flush_track_timer + drive, jiffies + 1);
-			local_irq_restore(flags);
 		}
 	}
 
-	if (__blk_end_request_cur(rq, err))
-		goto next_segment;
-	goto next_req;
+	return BLK_STS_OK;
 }
 
-static void do_fd_request(struct request_queue * q)
+static blk_status_t amiflop_queue_rq(struct blk_mq_hw_ctx *hctx,
+				     const struct blk_mq_queue_data *bd)
 {
-	redo_fd_request();
+	struct request *rq = bd->rq;
+	struct amiga_floppy_struct *floppy = rq->rq_disk->private_data;
+	blk_status_t err;
+
+	if (!spin_trylock_irq(&amiflop_lock))
+		return BLK_STS_DEV_RESOURCE;
+
+	blk_mq_start_request(rq);
+
+	do {
+		err = amiflop_rw_cur_segment(floppy, rq);
+	} while (blk_update_request(rq, err, blk_rq_cur_bytes(rq)));
+	blk_mq_end_request(rq, err);
+
+	spin_unlock_irq(&amiflop_lock);
+	return BLK_STS_OK;
 }
 
 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
@@ -1701,11 +1769,47 @@ static const struct block_device_operations floppy_fops = {
 	.check_events	= amiga_check_events,
 };
 
+static const struct blk_mq_ops amiflop_mq_ops = {
+	.queue_rq = amiflop_queue_rq,
+};
+
+static struct gendisk *fd_alloc_disk(int drive)
+{
+	struct gendisk *disk;
+
+	disk = alloc_disk(1);
+	if (!disk)
+		goto out;
+
+	disk->queue = blk_mq_init_sq_queue(&unit[drive].tag_set, &amiflop_mq_ops,
+						2, BLK_MQ_F_SHOULD_MERGE);
+	if (IS_ERR(disk->queue)) {
+		disk->queue = NULL;
+		goto out_put_disk;
+	}
+
+	unit[drive].trackbuf = kmalloc(FLOPPY_MAX_SECTORS * 512, GFP_KERNEL);
+	if (!unit[drive].trackbuf)
+		goto out_cleanup_queue;
+
+	return disk;
+
+out_cleanup_queue:
+	blk_cleanup_queue(disk->queue);
+	disk->queue = NULL;
+	blk_mq_free_tag_set(&unit[drive].tag_set);
+out_put_disk:
+	put_disk(disk);
+out:
+	unit[drive].type->code = FD_NODRIVE;
+	return NULL;
+}
+
 static int __init fd_probe_drives(void)
 {
 	int drive,drives,nomem;
 
-	printk(KERN_INFO "FD: probing units\nfound ");
+	pr_info("FD: probing units\nfound");
 	drives=0;
 	nomem=0;
 	for(drive=0;drive<FD_MAX_UNITS;drive++) {
@@ -1713,27 +1817,17 @@ static int __init fd_probe_drives(void)
 		fd_probe(drive);
 		if (unit[drive].type->code == FD_NODRIVE)
 			continue;
-		disk = alloc_disk(1);
+
+		disk = fd_alloc_disk(drive);
 		if (!disk) {
-			unit[drive].type->code = FD_NODRIVE;
+			pr_cont(" no mem for fd%d", drive);
+			nomem = 1;
 			continue;
 		}
 		unit[drive].gendisk = disk;
-
-		disk->queue = blk_init_queue(do_fd_request, &amiflop_lock);
-		if (!disk->queue) {
-			unit[drive].type->code = FD_NODRIVE;
-			continue;
-		}
-
 		drives++;
-		if ((unit[drive].trackbuf = kmalloc(FLOPPY_MAX_SECTORS * 512, GFP_KERNEL)) == NULL) {
-			printk("no mem for ");
-			unit[drive].type = &drive_types[num_dr_types - 1]; /* FD_NODRIVE */
-			drives--;
-			nomem = 1;
-		}
-		printk("fd%d ",drive);
+
+		pr_cont(" fd%d",drive);
 		disk->major = FLOPPY_MAJOR;
 		disk->first_minor = drive;
 		disk->fops = &floppy_fops;
@@ -1744,11 +1838,11 @@ static int __init fd_probe_drives(void)
 	}
 	if ((drives > 0) || (nomem == 0)) {
 		if (drives == 0)
-			printk("no drives");
-		printk("\n");
+			pr_cont(" no drives");
+		pr_cont("\n");
 		return drives;
 	}
-	printk("\n");
+	pr_cont("\n");
 	return -ENOMEM;
 }
  
@@ -1831,30 +1925,6 @@ out_blkdev:
 	return ret;
 }
 
-#if 0 /* not safe to unload */
-static int __exit amiga_floppy_remove(struct platform_device *pdev)
-{
-	int i;
-
-	for( i = 0; i < FD_MAX_UNITS; i++) {
-		if (unit[i].type->code != FD_NODRIVE) {
-			struct request_queue *q = unit[i].gendisk->queue;
-			del_gendisk(unit[i].gendisk);
-			put_disk(unit[i].gendisk);
-			kfree(unit[i].trackbuf);
-			if (q)
-				blk_cleanup_queue(q);
-		}
-	}
-	blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
-	free_irq(IRQ_AMIGA_CIAA_TB, NULL);
-	free_irq(IRQ_AMIGA_DSKBLK, NULL);
-	custom.dmacon = DMAF_DISK; /* disable DMA */
-	amiga_chip_free(raw_buf);
-	unregister_blkdev(FLOPPY_MAJOR, "fd");
-}
-#endif
-
 static struct platform_driver amiga_floppy_driver = {
 	.driver   = {
 		.name	= "amiga-floppy",

drivers/block/aoe/aoe.h

@@ -1,4 +1,6 @@
 /* Copyright (c) 2013 Coraid, Inc.  See COPYING for GPL terms. */
+#include <linux/blk-mq.h>
+
 #define VERSION "85"
 #define AOE_MAJOR 152
 #define DEVICE_NAME "aoe"
@@ -164,6 +166,8 @@ struct aoedev {
 	struct gendisk *gd;
 	struct dentry *debugfs;
 	struct request_queue *blkq;
+	struct list_head rq_list;
+	struct blk_mq_tag_set tag_set;
 	struct hd_geometry geo;
 	sector_t ssize;
 	struct timer_list timer;
@@ -201,7 +205,6 @@ int aoeblk_init(void);
 void aoeblk_exit(void);
 void aoeblk_gdalloc(void *);
 void aoedisk_rm_debugfs(struct aoedev *d);
-void aoedisk_rm_sysfs(struct aoedev *d);
 
 int aoechr_init(void);
 void aoechr_exit(void);

drivers/block/aoe/aoeblk.c

@@ -6,7 +6,7 @@
 
 #include <linux/kernel.h>
 #include <linux/hdreg.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/backing-dev.h>
 #include <linux/fs.h>
 #include <linux/ioctl.h>
@@ -177,10 +177,15 @@ static struct attribute *aoe_attrs[] = {
 	NULL,
 };
 
-static const struct attribute_group attr_group = {
+static const struct attribute_group aoe_attr_group = {
 	.attrs = aoe_attrs,
 };
 
+static const struct attribute_group *aoe_attr_groups[] = {
+	&aoe_attr_group,
+	NULL,
+};
+
 static const struct file_operations aoe_debugfs_fops = {
 	.open = aoe_debugfs_open,
 	.read = seq_read,
@@ -219,17 +224,6 @@ aoedisk_rm_debugfs(struct aoedev *d)
 	d->debugfs = NULL;
 }
 
-static int
-aoedisk_add_sysfs(struct aoedev *d)
-{
-	return sysfs_create_group(&disk_to_dev(d->gd)->kobj, &attr_group);
-}
-void
-aoedisk_rm_sysfs(struct aoedev *d)
-{
-	sysfs_remove_group(&disk_to_dev(d->gd)->kobj, &attr_group);
-}
-
 static int
 aoeblk_open(struct block_device *bdev, fmode_t mode)
 {
@@ -274,23 +268,25 @@ aoeblk_release(struct gendisk *disk, fmode_t mode)
 	spin_unlock_irqrestore(&d->lock, flags);
 }
 
-static void
-aoeblk_request(struct request_queue *q)
+static blk_status_t aoeblk_queue_rq(struct blk_mq_hw_ctx *hctx,
+				    const struct blk_mq_queue_data *bd)
 {
-	struct aoedev *d;
-	struct request *rq;
+	struct aoedev *d = hctx->queue->queuedata;
+
+	spin_lock_irq(&d->lock);
 
-	d = q->queuedata;
 	if ((d->flags & DEVFL_UP) == 0) {
 		pr_info_ratelimited("aoe: device %ld.%d is not up\n",
 			d->aoemajor, d->aoeminor);
-		while ((rq = blk_peek_request(q))) {
-			blk_start_request(rq);
-			aoe_end_request(d, rq, 1);
-		}
-		return;
+		spin_unlock_irq(&d->lock);
+		blk_mq_start_request(bd->rq);
+		return BLK_STS_IOERR;
 	}
+
+	list_add_tail(&bd->rq->queuelist, &d->rq_list);
 	aoecmd_work(d);
+	spin_unlock_irq(&d->lock);
+	return BLK_STS_OK;
 }
 
 static int
@@ -345,6 +341,10 @@ static const struct block_device_operations aoe_bdops = {
 	.owner = THIS_MODULE,
 };
 
+static const struct blk_mq_ops aoeblk_mq_ops = {
+	.queue_rq	= aoeblk_queue_rq,
+};
+
 /* alloc_disk and add_disk can sleep */
 void
 aoeblk_gdalloc(void *vp)
@@ -353,9 +353,11 @@ aoeblk_gdalloc(void *vp)
 	struct gendisk *gd;
 	mempool_t *mp;
 	struct request_queue *q;
+	struct blk_mq_tag_set *set;
 	enum { KB = 1024, MB = KB * KB, READ_AHEAD = 2 * MB, };
 	ulong flags;
 	int late = 0;
+	int err;
 
 	spin_lock_irqsave(&d->lock, flags);
 	if (d->flags & DEVFL_GDALLOC
@@ -382,10 +384,25 @@ aoeblk_gdalloc(void *vp)
 			d->aoemajor, d->aoeminor);
 		goto err_disk;
 	}
-	q = blk_init_queue(aoeblk_request, &d->lock);
-	if (q == NULL) {
+
+	set = &d->tag_set;
+	set->ops = &aoeblk_mq_ops;
+	set->nr_hw_queues = 1;
+	set->queue_depth = 128;
+	set->numa_node = NUMA_NO_NODE;
+	set->flags = BLK_MQ_F_SHOULD_MERGE;
+	err = blk_mq_alloc_tag_set(set);
+	if (err) {
+		pr_err("aoe: cannot allocate tag set for %ld.%d\n",
+			d->aoemajor, d->aoeminor);
+		goto err_mempool;
+	}
+
+	q = blk_mq_init_queue(set);
+	if (IS_ERR(q)) {
 		pr_err("aoe: cannot allocate block queue for %ld.%d\n",
 			d->aoemajor, d->aoeminor);
+		blk_mq_free_tag_set(set);
 		goto err_mempool;
 	}
 
@@ -417,8 +434,7 @@ aoeblk_gdalloc(void *vp)
 
 	spin_unlock_irqrestore(&d->lock, flags);
 
-	add_disk(gd);
-	aoedisk_add_sysfs(d);
+	device_add_disk(NULL, gd, aoe_attr_groups);
 	aoedisk_add_debugfs(d);
 
 	spin_lock_irqsave(&d->lock, flags);

drivers/block/aoe/aoecmd.c

@@ -7,7 +7,7 @@
 #include <linux/ata.h>
 #include <linux/slab.h>
 #include <linux/hdreg.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/skbuff.h>
 #include <linux/netdevice.h>
 #include <linux/genhd.h>
@@ -813,7 +813,7 @@ rexmit_timer(struct timer_list *timer)
 out:
 	if ((d->flags & DEVFL_KICKME) && d->blkq) {
 		d->flags &= ~DEVFL_KICKME;
-		d->blkq->request_fn(d->blkq);
+		blk_mq_run_hw_queues(d->blkq, true);
 	}
 
 	d->timer.expires = jiffies + TIMERTICK;
@@ -857,10 +857,12 @@ nextbuf(struct aoedev *d)
 		return d->ip.buf;
 	rq = d->ip.rq;
 	if (rq == NULL) {
-		rq = blk_peek_request(q);
+		rq = list_first_entry_or_null(&d->rq_list, struct request,
+						queuelist);
 		if (rq == NULL)
 			return NULL;
-		blk_start_request(rq);
+		list_del_init(&rq->queuelist);
+		blk_mq_start_request(rq);
 		d->ip.rq = rq;
 		d->ip.nxbio = rq->bio;
 		rq->special = (void *) rqbiocnt(rq);
@@ -1045,6 +1047,7 @@ aoe_end_request(struct aoedev *d, struct request *rq, int fastfail)
 	struct bio *bio;
 	int bok;
 	struct request_queue *q;
+	blk_status_t err = BLK_STS_OK;
 
 	q = d->blkq;
 	if (rq == d->ip.rq)
@@ -1052,11 +1055,15 @@ aoe_end_request(struct aoedev *d, struct request *rq, int fastfail)
 	do {
 		bio = rq->bio;
 		bok = !fastfail && !bio->bi_status;
-	} while (__blk_end_request(rq, bok ? BLK_STS_OK : BLK_STS_IOERR, bio->bi_iter.bi_size));
+		if (!bok)
+			err = BLK_STS_IOERR;
+	} while (blk_update_request(rq, bok ? BLK_STS_OK : BLK_STS_IOERR, bio->bi_iter.bi_size));
+
+	__blk_mq_end_request(rq, err);
 
 	/* cf. http://lkml.org/lkml/2006/10/31/28 */
 	if (!fastfail)
-		__blk_run_queue(q);
+		blk_mq_run_hw_queues(q, true);
 }
 
 static void

drivers/block/aoe/aoedev.c

@@ -5,7 +5,7 @@
  */
 
 #include <linux/hdreg.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/netdevice.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
@@ -197,7 +197,6 @@ aoedev_downdev(struct aoedev *d)
 {
 	struct aoetgt *t, **tt, **te;
 	struct list_head *head, *pos, *nx;
-	struct request *rq;
 	int i;
 
 	d->flags &= ~DEVFL_UP;
@@ -225,10 +224,11 @@ aoedev_downdev(struct aoedev *d)
 
 	/* fast fail all pending I/O */
 	if (d->blkq) {
-		while ((rq = blk_peek_request(d->blkq))) {
-			blk_start_request(rq);
-			aoe_end_request(d, rq, 1);
-		}
+		/* UP is cleared, freeze+quiesce to insure all are errored */
+		blk_mq_freeze_queue(d->blkq);
+		blk_mq_quiesce_queue(d->blkq);
+		blk_mq_unquiesce_queue(d->blkq);
+		blk_mq_unfreeze_queue(d->blkq);
 	}
 
 	if (d->gd)
@@ -275,9 +275,9 @@ freedev(struct aoedev *d)
 	del_timer_sync(&d->timer);
 	if (d->gd) {
 		aoedisk_rm_debugfs(d);
-		aoedisk_rm_sysfs(d);
 		del_gendisk(d->gd);
 		put_disk(d->gd);
+		blk_mq_free_tag_set(&d->tag_set);
 		blk_cleanup_queue(d->blkq);
 	}
 	t = d->targets;
@@ -464,6 +464,7 @@ aoedev_by_aoeaddr(ulong maj, int min, int do_alloc)
 	d->ntargets = NTARGETS;
 	INIT_WORK(&d->work, aoecmd_sleepwork);
 	spin_lock_init(&d->lock);
+	INIT_LIST_HEAD(&d->rq_list);
 	skb_queue_head_init(&d->skbpool);
 	timer_setup(&d->timer, dummy_timer, 0);
 	d->timer.expires = jiffies + HZ;

drivers/block/ataflop.c

@@ -66,13 +66,11 @@
 #include <linux/fd.h>
 #include <linux/delay.h>
 #include <linux/init.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/mutex.h>
 #include <linux/completion.h>
 #include <linux/wait.h>
 
-#include <asm/atafd.h>
-#include <asm/atafdreg.h>
 #include <asm/atariints.h>
 #include <asm/atari_stdma.h>
 #include <asm/atari_stram.h>
@@ -83,7 +81,87 @@
 
 static DEFINE_MUTEX(ataflop_mutex);
 static struct request *fd_request;
-static int fdc_queue;
+
+/*
+ * WD1772 stuff
+ */
+
+/* register codes */
+
+#define FDCSELREG_STP   (0x80)   /* command/status register */
+#define FDCSELREG_TRA   (0x82)   /* track register */
+#define FDCSELREG_SEC   (0x84)   /* sector register */
+#define FDCSELREG_DTA   (0x86)   /* data register */
+
+/* register names for FDC_READ/WRITE macros */
+
+#define FDCREG_CMD		0
+#define FDCREG_STATUS	0
+#define FDCREG_TRACK	2
+#define FDCREG_SECTOR	4
+#define FDCREG_DATA		6
+
+/* command opcodes */
+
+#define FDCCMD_RESTORE  (0x00)   /*  -                   */
+#define FDCCMD_SEEK     (0x10)   /*   |                  */
+#define FDCCMD_STEP     (0x20)   /*   |  TYP 1 Commands  */
+#define FDCCMD_STIN     (0x40)   /*   |                  */
+#define FDCCMD_STOT     (0x60)   /*  -                   */
+#define FDCCMD_RDSEC    (0x80)   /*  -   TYP 2 Commands  */
+#define FDCCMD_WRSEC    (0xa0)   /*  -          "        */
+#define FDCCMD_RDADR    (0xc0)   /*  -                   */
+#define FDCCMD_RDTRA    (0xe0)   /*   |  TYP 3 Commands  */
+#define FDCCMD_WRTRA    (0xf0)   /*  -                   */
+#define FDCCMD_FORCI    (0xd0)   /*  -   TYP 4 Command   */
+
+/* command modifier bits */
+
+#define FDCCMDADD_SR6   (0x00)   /* step rate settings */
+#define FDCCMDADD_SR12  (0x01)
+#define FDCCMDADD_SR2   (0x02)
+#define FDCCMDADD_SR3   (0x03)
+#define FDCCMDADD_V     (0x04)   /* verify */
+#define FDCCMDADD_H     (0x08)   /* wait for spin-up */
+#define FDCCMDADD_U     (0x10)   /* update track register */
+#define FDCCMDADD_M     (0x10)   /* multiple sector access */
+#define FDCCMDADD_E     (0x04)   /* head settling flag */
+#define FDCCMDADD_P     (0x02)   /* precompensation off */
+#define FDCCMDADD_A0    (0x01)   /* DAM flag */
+
+/* status register bits */
+
+#define	FDCSTAT_MOTORON	(0x80)   /* motor on */
+#define	FDCSTAT_WPROT	(0x40)   /* write protected (FDCCMD_WR*) */
+#define	FDCSTAT_SPINUP	(0x20)   /* motor speed stable (Type I) */
+#define	FDCSTAT_DELDAM	(0x20)   /* sector has deleted DAM (Type II+III) */
+#define	FDCSTAT_RECNF	(0x10)   /* record not found */
+#define	FDCSTAT_CRC		(0x08)   /* CRC error */
+#define	FDCSTAT_TR00	(0x04)   /* Track 00 flag (Type I) */
+#define	FDCSTAT_LOST	(0x04)   /* Lost Data (Type II+III) */
+#define	FDCSTAT_IDX		(0x02)   /* Index status (Type I) */
+#define	FDCSTAT_DRQ		(0x02)   /* DRQ status (Type II+III) */
+#define	FDCSTAT_BUSY	(0x01)   /* FDC is busy */
+
+
+/* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1  1 -> Side 2 */
+#define DSKSIDE     (0x01)
+
+#define DSKDRVNONE  (0x06)
+#define DSKDRV0     (0x02)
+#define DSKDRV1     (0x04)
+
+/* step rates */
+#define	FDCSTEP_6	0x00
+#define	FDCSTEP_12	0x01
+#define	FDCSTEP_2	0x02
+#define	FDCSTEP_3	0x03
+
+struct atari_format_descr {
+	int track;		/* to be formatted */
+	int head;		/*   ""     ""     */
+	int sect_offset;	/* offset of first sector */
+};
 
 /* Disk types: DD, HD, ED */
 static struct atari_disk_type {
@@ -221,6 +299,7 @@ static struct atari_floppy_struct {
 	struct gendisk *disk;
 	int ref;
 	int type;
+	struct blk_mq_tag_set tag_set;
 } unit[FD_MAX_UNITS];
 
 #define	UD	unit[drive]
@@ -300,9 +379,6 @@ static int IsFormatting = 0, FormatError;
 static int UserSteprate[FD_MAX_UNITS] = { -1, -1 };
 module_param_array(UserSteprate, int, NULL, 0);
 
-/* Synchronization of FDC access. */
-static volatile int fdc_busy = 0;
-static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
 static DECLARE_COMPLETION(format_wait);
 
 static unsigned long changed_floppies = 0xff, fake_change = 0;
@@ -362,7 +438,6 @@ static void fd_times_out(struct timer_list *unused);
 static void finish_fdc( void );
 static void finish_fdc_done( int dummy );
 static void setup_req_params( int drive );
-static void redo_fd_request( void);
 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
                      cmd, unsigned long param);
 static void fd_probe( int drive );
@@ -380,8 +455,11 @@ static DEFINE_TIMER(fd_timer, check_change);
 	
 static void fd_end_request_cur(blk_status_t err)
 {
-	if (!__blk_end_request_cur(fd_request, err))
+	if (!blk_update_request(fd_request, err,
+				blk_rq_cur_bytes(fd_request))) {
+		__blk_mq_end_request(fd_request, err);
 		fd_request = NULL;
+	}
 }
 
 static inline void start_motor_off_timer(void)
@@ -627,7 +705,6 @@ static void fd_error( void )
 		if (SelectedDrive != -1)
 			SUD.track = -1;
 	}
-	redo_fd_request();
 }
 
 
@@ -645,14 +722,15 @@ static void fd_error( void )
 
 static int do_format(int drive, int type, struct atari_format_descr *desc)
 {
+	struct request_queue *q = unit[drive].disk->queue;
 	unsigned char	*p;
 	int sect, nsect;
 	unsigned long	flags;
+	int ret;
 
-	DPRINT(("do_format( dr=%d tr=%d he=%d offs=%d )\n",
-		drive, desc->track, desc->head, desc->sect_offset ));
+	blk_mq_freeze_queue(q);
+	blk_mq_quiesce_queue(q);
 
-	wait_event(fdc_wait, cmpxchg(&fdc_busy, 0, 1) == 0);
 	local_irq_save(flags);
 	stdma_lock(floppy_irq, NULL);
 	atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */
@@ -661,16 +739,16 @@ static int do_format(int drive, int type, struct atari_format_descr *desc)
 	if (type) {
 		if (--type >= NUM_DISK_MINORS ||
 		    minor2disktype[type].drive_types > DriveType) {
-			redo_fd_request();
-			return -EINVAL;
+			ret = -EINVAL;
+			goto out;
 		}
 		type = minor2disktype[type].index;
 		UDT = &atari_disk_type[type];
 	}
 
 	if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) {
-		redo_fd_request();
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	nsect = UDT->spt;
@@ -709,8 +787,11 @@ static int do_format(int drive, int type, struct atari_format_descr *desc)
 
 	wait_for_completion(&format_wait);
 
-	redo_fd_request();
-	return( FormatError ? -EIO : 0 );	
+	ret = FormatError ? -EIO : 0;
+out:
+	blk_mq_unquiesce_queue(q);
+	blk_mq_unfreeze_queue(q);
+	return ret;
 }
 
 
@@ -740,7 +821,6 @@ static void do_fd_action( int drive )
 		    else {
 			/* all sectors finished */
 			fd_end_request_cur(BLK_STS_OK);
-			redo_fd_request();
 			return;
 		    }
 		}
@@ -1145,7 +1225,6 @@ static void fd_rwsec_done1(int status)
 	else {
 		/* all sectors finished */
 		fd_end_request_cur(BLK_STS_OK);
-		redo_fd_request();
 	}
 	return;
   
@@ -1303,8 +1382,6 @@ static void finish_fdc_done( int dummy )
 
 	local_irq_save(flags);
 	stdma_release();
-	fdc_busy = 0;
-	wake_up( &fdc_wait );
 	local_irq_restore(flags);
 
 	DPRINT(("finish_fdc() finished\n"));
@@ -1394,59 +1471,34 @@ static void setup_req_params( int drive )
 			ReqTrack, ReqSector, (unsigned long)ReqData ));
 }
 
-/*
- * Round-robin between our available drives, doing one request from each
- */
-static struct request *set_next_request(void)
+static blk_status_t ataflop_queue_rq(struct blk_mq_hw_ctx *hctx,
+				     const struct blk_mq_queue_data *bd)
 {
-	struct request_queue *q;
-	int old_pos = fdc_queue;
-	struct request *rq = NULL;
-
-	do {
-		q = unit[fdc_queue].disk->queue;
-		if (++fdc_queue == FD_MAX_UNITS)
-			fdc_queue = 0;
-		if (q) {
-			rq = blk_fetch_request(q);
-			if (rq) {
-				rq->error_count = 0;
-				break;
-			}
-		}
-	} while (fdc_queue != old_pos);
-
-	return rq;
-}
-
+	struct atari_floppy_struct *floppy = bd->rq->rq_disk->private_data;
+	int drive = floppy - unit;
+	int type = floppy->type;
 
-static void redo_fd_request(void)
-{
-	int drive, type;
-	struct atari_floppy_struct *floppy;
+	spin_lock_irq(&ataflop_lock);
+	if (fd_request) {
+		spin_unlock_irq(&ataflop_lock);
+		return BLK_STS_DEV_RESOURCE;
+	}
+	if (!stdma_try_lock(floppy_irq, NULL))  {
+		spin_unlock_irq(&ataflop_lock);
+		return BLK_STS_RESOURCE;
+	}
+	fd_request = bd->rq;
+	blk_mq_start_request(fd_request);
 
-	DPRINT(("redo_fd_request: fd_request=%p dev=%s fd_request->sector=%ld\n",
-		fd_request, fd_request ? fd_request->rq_disk->disk_name : "",
-		fd_request ? blk_rq_pos(fd_request) : 0 ));
+	atari_disable_irq( IRQ_MFP_FDC );
 
 	IsFormatting = 0;
 
-repeat:
-	if (!fd_request) {
-		fd_request = set_next_request();
-		if (!fd_request)
-			goto the_end;
-	}
-
-	floppy = fd_request->rq_disk->private_data;
-	drive = floppy - unit;
-	type = floppy->type;
-	
 	if (!UD.connected) {
 		/* drive not connected */
 		printk(KERN_ERR "Unknown Device: fd%d\n", drive );
 		fd_end_request_cur(BLK_STS_IOERR);
-		goto repeat;
+		goto out;
 	}
 		
 	if (type == 0) {
@@ -1462,23 +1514,18 @@ repeat:
 		if (--type >= NUM_DISK_MINORS) {
 			printk(KERN_WARNING "fd%d: invalid disk format", drive );
 			fd_end_request_cur(BLK_STS_IOERR);
-			goto repeat;
+			goto out;
 		}
 		if (minor2disktype[type].drive_types > DriveType)  {
 			printk(KERN_WARNING "fd%d: unsupported disk format", drive );
 			fd_end_request_cur(BLK_STS_IOERR);
-			goto repeat;
+			goto out;
 		}
 		type = minor2disktype[type].index;
 		UDT = &atari_disk_type[type];
 		set_capacity(floppy->disk, UDT->blocks);
 		UD.autoprobe = 0;
 	}
-	
-	if (blk_rq_pos(fd_request) + 1 > UDT->blocks) {
-		fd_end_request_cur(BLK_STS_IOERR);
-		goto repeat;
-	}
 
 	/* stop deselect timer */
 	del_timer( &motor_off_timer );
@@ -1490,22 +1537,13 @@ repeat:
 	setup_req_params( drive );
 	do_fd_action( drive );
 
-	return;
-
-  the_end:
-	finish_fdc();
-}
-
-
-void do_fd_request(struct request_queue * q)
-{
-	DPRINT(("do_fd_request for pid %d\n",current->pid));
-	wait_event(fdc_wait, cmpxchg(&fdc_busy, 0, 1) == 0);
-	stdma_lock(floppy_irq, NULL);
-
-	atari_disable_irq( IRQ_MFP_FDC );
-	redo_fd_request();
+	if (bd->last)
+		finish_fdc();
 	atari_enable_irq( IRQ_MFP_FDC );
+
+out:
+	spin_unlock_irq(&ataflop_lock);
+	return BLK_STS_OK;
 }
 
 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
@@ -1583,7 +1621,6 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 		/* what if type > 0 here? Overwrite specified entry ? */
 		if (type) {
 		        /* refuse to re-set a predefined type for now */
-			redo_fd_request();
 			return -EINVAL;
 		}
 
@@ -1651,10 +1688,8 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 
 		/* sanity check */
 		if (setprm.track != dtp->blocks/dtp->spt/2 ||
-		    setprm.head != 2) {
-			redo_fd_request();
+		    setprm.head != 2)
 			return -EINVAL;
-		}
 
 		UDT = dtp;
 		set_capacity(floppy->disk, UDT->blocks);
@@ -1910,6 +1945,10 @@ static const struct block_device_operations floppy_fops = {
 	.revalidate_disk= floppy_revalidate,
 };
 
+static const struct blk_mq_ops ataflop_mq_ops = {
+	.queue_rq = ataflop_queue_rq,
+};
+
 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
 {
 	int drive = *part & 3;
@@ -1923,6 +1962,7 @@ static struct kobject *floppy_find(dev_t dev, int *part, void *data)
 static int __init atari_floppy_init (void)
 {
 	int i;
+	int ret;
 
 	if (!MACH_IS_ATARI)
 		/* Amiga, Mac, ... don't have Atari-compatible floppy :-) */
@@ -1933,8 +1973,19 @@ static int __init atari_floppy_init (void)
 
 	for (i = 0; i < FD_MAX_UNITS; i++) {
 		unit[i].disk = alloc_disk(1);
-		if (!unit[i].disk)
-			goto Enomem;
+		if (!unit[i].disk) {
+			ret = -ENOMEM;
+			goto err;
+		}
+
+		unit[i].disk->queue = blk_mq_init_sq_queue(&unit[i].tag_set,
+							   &ataflop_mq_ops, 2,
+							   BLK_MQ_F_SHOULD_MERGE);
+		if (IS_ERR(unit[i].disk->queue)) {
+			ret = PTR_ERR(unit[i].disk->queue);
+			unit[i].disk->queue = NULL;
+			goto err;
+		}
 	}
 
 	if (UseTrackbuffer < 0)
@@ -1951,7 +2002,8 @@ static int __init atari_floppy_init (void)
 	DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop");
 	if (!DMABuffer) {
 		printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n");
-		goto Enomem;
+		ret = -ENOMEM;
+		goto err;
 	}
 	TrackBuffer = DMABuffer + 512;
 	PhysDMABuffer = atari_stram_to_phys(DMABuffer);
@@ -1966,10 +2018,6 @@ static int __init atari_floppy_init (void)
 		sprintf(unit[i].disk->disk_name, "fd%d", i);
 		unit[i].disk->fops = &floppy_fops;
 		unit[i].disk->private_data = &unit[i];
-		unit[i].disk->queue = blk_init_queue(do_fd_request,
-					&ataflop_lock);
-		if (!unit[i].disk->queue)
-			goto Enomem;
 		set_capacity(unit[i].disk, MAX_DISK_SIZE * 2);
 		add_disk(unit[i].disk);
 	}
@@ -1983,17 +2031,23 @@ static int __init atari_floppy_init (void)
 	config_types();
 
 	return 0;
-Enomem:
-	while (i--) {
-		struct request_queue *q = unit[i].disk->queue;
 
-		put_disk(unit[i].disk);
-		if (q)
-			blk_cleanup_queue(q);
-	}
+err:
+	do {
+		struct gendisk *disk = unit[i].disk;
+
+		if (disk) {
+			if (disk->queue) {
+				blk_cleanup_queue(disk->queue);
+				disk->queue = NULL;
+			}
+			blk_mq_free_tag_set(&unit[i].tag_set);
+			put_disk(unit[i].disk);
+		}
+	} while (i--);
 
 	unregister_blkdev(FLOPPY_MAJOR, "fd");
-	return -ENOMEM;
+	return ret;
 }
 
 #ifndef MODULE
@@ -2040,11 +2094,10 @@ static void __exit atari_floppy_exit(void)
 	int i;
 	blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
 	for (i = 0; i < FD_MAX_UNITS; i++) {
-		struct request_queue *q = unit[i].disk->queue;
-
 		del_gendisk(unit[i].disk);
+		blk_cleanup_queue(unit[i].disk->queue);
+		blk_mq_free_tag_set(&unit[i].tag_set);
 		put_disk(unit[i].disk);
-		blk_cleanup_queue(q);
 	}
 	unregister_blkdev(FLOPPY_MAJOR, "fd");
 

drivers/block/drbd/Kconfig

@@ -11,7 +11,6 @@ config BLK_DEV_DRBD
 	depends on PROC_FS && INET
 	select LRU_CACHE
 	select LIBCRC32C
-	default n
 	help
 
 	  NOTE: In order to authenticate connections you have to select

drivers/block/drbd/drbd_int.h

@@ -429,7 +429,7 @@ enum {
 	__EE_CALL_AL_COMPLETE_IO,
 	__EE_MAY_SET_IN_SYNC,
 
-	/* is this a TRIM aka REQ_DISCARD? */
+	/* is this a TRIM aka REQ_OP_DISCARD? */
 	__EE_IS_TRIM,
 
 	/* In case a barrier failed,
@@ -724,10 +724,10 @@ struct drbd_connection {
 	struct list_head transfer_log;	/* all requests not yet fully processed */
 
 	struct crypto_shash *cram_hmac_tfm;
-	struct crypto_ahash *integrity_tfm;  /* checksums we compute, updates protected by connection->data->mutex */
-	struct crypto_ahash *peer_integrity_tfm;  /* checksums we verify, only accessed from receiver thread  */
-	struct crypto_ahash *csums_tfm;
-	struct crypto_ahash *verify_tfm;
+	struct crypto_shash *integrity_tfm;  /* checksums we compute, updates protected by connection->data->mutex */
+	struct crypto_shash *peer_integrity_tfm;  /* checksums we verify, only accessed from receiver thread  */
+	struct crypto_shash *csums_tfm;
+	struct crypto_shash *verify_tfm;
 	void *int_dig_in;
 	void *int_dig_vv;
 
@@ -1531,8 +1531,9 @@ static inline void ov_out_of_sync_print(struct drbd_device *device)
 }
 
 
-extern void drbd_csum_bio(struct crypto_ahash *, struct bio *, void *);
-extern void drbd_csum_ee(struct crypto_ahash *, struct drbd_peer_request *, void *);
+extern void drbd_csum_bio(struct crypto_shash *, struct bio *, void *);
+extern void drbd_csum_ee(struct crypto_shash *, struct drbd_peer_request *,
+			 void *);
 /* worker callbacks */
 extern int w_e_end_data_req(struct drbd_work *, int);
 extern int w_e_end_rsdata_req(struct drbd_work *, int);

drivers/block/drbd/drbd_main.c

@@ -1377,7 +1377,7 @@ void drbd_send_ack_dp(struct drbd_peer_device *peer_device, enum drbd_packet cmd
 		      struct p_data *dp, int data_size)
 {
 	if (peer_device->connection->peer_integrity_tfm)
-		data_size -= crypto_ahash_digestsize(peer_device->connection->peer_integrity_tfm);
+		data_size -= crypto_shash_digestsize(peer_device->connection->peer_integrity_tfm);
 	_drbd_send_ack(peer_device, cmd, dp->sector, cpu_to_be32(data_size),
 		       dp->block_id);
 }
@@ -1673,7 +1673,7 @@ static u32 bio_flags_to_wire(struct drbd_connection *connection,
 		return bio->bi_opf & REQ_SYNC ? DP_RW_SYNC : 0;
 }
 
-/* Used to send write or TRIM aka REQ_DISCARD requests
+/* Used to send write or TRIM aka REQ_OP_DISCARD requests
  * R_PRIMARY -> Peer	(P_DATA, P_TRIM)
  */
 int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request *req)
@@ -1690,7 +1690,7 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request *
 	sock = &peer_device->connection->data;
 	p = drbd_prepare_command(peer_device, sock);
 	digest_size = peer_device->connection->integrity_tfm ?
-		      crypto_ahash_digestsize(peer_device->connection->integrity_tfm) : 0;
+		      crypto_shash_digestsize(peer_device->connection->integrity_tfm) : 0;
 
 	if (!p)
 		return -EIO;
@@ -1796,7 +1796,7 @@ int drbd_send_block(struct drbd_peer_device *peer_device, enum drbd_packet cmd,
 	p = drbd_prepare_command(peer_device, sock);
 
 	digest_size = peer_device->connection->integrity_tfm ?
-		      crypto_ahash_digestsize(peer_device->connection->integrity_tfm) : 0;
+		      crypto_shash_digestsize(peer_device->connection->integrity_tfm) : 0;
 
 	if (!p)
 		return -EIO;
@@ -2557,11 +2557,11 @@ void conn_free_crypto(struct drbd_connection *connection)
 {
 	drbd_free_sock(connection);
 
-	crypto_free_ahash(connection->csums_tfm);
-	crypto_free_ahash(connection->verify_tfm);
+	crypto_free_shash(connection->csums_tfm);
+	crypto_free_shash(connection->verify_tfm);
 	crypto_free_shash(connection->cram_hmac_tfm);
-	crypto_free_ahash(connection->integrity_tfm);
-	crypto_free_ahash(connection->peer_integrity_tfm);
+	crypto_free_shash(connection->integrity_tfm);
+	crypto_free_shash(connection->peer_integrity_tfm);
 	kfree(connection->int_dig_in);
 	kfree(connection->int_dig_vv);
 

drivers/block/drbd/drbd_nl.c

@@ -2303,10 +2303,10 @@ check_net_options(struct drbd_connection *connection, struct net_conf *new_net_c
 }
 
 struct crypto {
-	struct crypto_ahash *verify_tfm;
-	struct crypto_ahash *csums_tfm;
+	struct crypto_shash *verify_tfm;
+	struct crypto_shash *csums_tfm;
 	struct crypto_shash *cram_hmac_tfm;
-	struct crypto_ahash *integrity_tfm;
+	struct crypto_shash *integrity_tfm;
 };
 
 static int
@@ -2324,36 +2324,21 @@ alloc_shash(struct crypto_shash **tfm, char *tfm_name, int err_alg)
 	return NO_ERROR;
 }
 
-static int
-alloc_ahash(struct crypto_ahash **tfm, char *tfm_name, int err_alg)
-{
-	if (!tfm_name[0])
-		return NO_ERROR;
-
-	*tfm = crypto_alloc_ahash(tfm_name, 0, CRYPTO_ALG_ASYNC);
-	if (IS_ERR(*tfm)) {
-		*tfm = NULL;
-		return err_alg;
-	}
-
-	return NO_ERROR;
-}
-
 static enum drbd_ret_code
 alloc_crypto(struct crypto *crypto, struct net_conf *new_net_conf)
 {
 	char hmac_name[CRYPTO_MAX_ALG_NAME];
 	enum drbd_ret_code rv;
 
-	rv = alloc_ahash(&crypto->csums_tfm, new_net_conf->csums_alg,
+	rv = alloc_shash(&crypto->csums_tfm, new_net_conf->csums_alg,
 			 ERR_CSUMS_ALG);
 	if (rv != NO_ERROR)
 		return rv;
-	rv = alloc_ahash(&crypto->verify_tfm, new_net_conf->verify_alg,
+	rv = alloc_shash(&crypto->verify_tfm, new_net_conf->verify_alg,
 			 ERR_VERIFY_ALG);
 	if (rv != NO_ERROR)
 		return rv;
-	rv = alloc_ahash(&crypto->integrity_tfm, new_net_conf->integrity_alg,
+	rv = alloc_shash(&crypto->integrity_tfm, new_net_conf->integrity_alg,
 			 ERR_INTEGRITY_ALG);
 	if (rv != NO_ERROR)
 		return rv;
@@ -2371,9 +2356,9 @@ alloc_crypto(struct crypto *crypto, struct net_conf *new_net_conf)
 static void free_crypto(struct crypto *crypto)
 {
 	crypto_free_shash(crypto->cram_hmac_tfm);
-	crypto_free_ahash(crypto->integrity_tfm);
-	crypto_free_ahash(crypto->csums_tfm);
-	crypto_free_ahash(crypto->verify_tfm);
+	crypto_free_shash(crypto->integrity_tfm);
+	crypto_free_shash(crypto->csums_tfm);
+	crypto_free_shash(crypto->verify_tfm);
 }
 
 int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
@@ -2450,17 +2435,17 @@ int drbd_adm_net_opts(struct sk_buff *skb, struct genl_info *info)
 	rcu_assign_pointer(connection->net_conf, new_net_conf);
 
 	if (!rsr) {
-		crypto_free_ahash(connection->csums_tfm);
+		crypto_free_shash(connection->csums_tfm);
 		connection->csums_tfm = crypto.csums_tfm;
 		crypto.csums_tfm = NULL;
 	}
 	if (!ovr) {
-		crypto_free_ahash(connection->verify_tfm);
+		crypto_free_shash(connection->verify_tfm);
 		connection->verify_tfm = crypto.verify_tfm;
 		crypto.verify_tfm = NULL;
 	}
 
-	crypto_free_ahash(connection->integrity_tfm);
+	crypto_free_shash(connection->integrity_tfm);
 	connection->integrity_tfm = crypto.integrity_tfm;
 	if (connection->cstate >= C_WF_REPORT_PARAMS && connection->agreed_pro_version >= 100)
 		/* Do this without trying to take connection->data.mutex again.  */

drivers/block/drbd/drbd_protocol.h

@@ -57,7 +57,7 @@ enum drbd_packet {
 	P_PROTOCOL_UPDATE     = 0x2d, /* data sock: is used in established connections */
         /* 0x2e to 0x30 reserved, used in drbd 9 */
 
-	/* REQ_DISCARD. We used "discard" in different contexts before,
+	/* REQ_OP_DISCARD. We used "discard" in different contexts before,
 	 * which is why I chose TRIM here, to disambiguate. */
 	P_TRIM                = 0x31,
 
@@ -126,7 +126,7 @@ struct p_header100 {
 #define DP_UNPLUG             8 /* not used anymore   */
 #define DP_FUA               16 /* equals REQ_FUA     */
 #define DP_FLUSH             32 /* equals REQ_PREFLUSH   */
-#define DP_DISCARD           64 /* equals REQ_DISCARD */
+#define DP_DISCARD           64 /* equals REQ_OP_DISCARD */
 #define DP_SEND_RECEIVE_ACK 128 /* This is a proto B write request */
 #define DP_SEND_WRITE_ACK   256 /* This is a proto C write request */
 #define DP_WSAME            512 /* equiv. REQ_WRITE_SAME */

drivers/block/drbd/drbd_receiver.c

@@ -1732,7 +1732,7 @@ static int receive_Barrier(struct drbd_connection *connection, struct packet_inf
 }
 
 /* quick wrapper in case payload size != request_size (write same) */
-static void drbd_csum_ee_size(struct crypto_ahash *h,
+static void drbd_csum_ee_size(struct crypto_shash *h,
 			      struct drbd_peer_request *r, void *d,
 			      unsigned int payload_size)
 {
@@ -1769,7 +1769,7 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector,
 
 	digest_size = 0;
 	if (!trim && peer_device->connection->peer_integrity_tfm) {
-		digest_size = crypto_ahash_digestsize(peer_device->connection->peer_integrity_tfm);
+		digest_size = crypto_shash_digestsize(peer_device->connection->peer_integrity_tfm);
 		/*
 		 * FIXME: Receive the incoming digest into the receive buffer
 		 *	  here, together with its struct p_data?
@@ -1905,7 +1905,7 @@ static int recv_dless_read(struct drbd_peer_device *peer_device, struct drbd_req
 
 	digest_size = 0;
 	if (peer_device->connection->peer_integrity_tfm) {
-		digest_size = crypto_ahash_digestsize(peer_device->connection->peer_integrity_tfm);
+		digest_size = crypto_shash_digestsize(peer_device->connection->peer_integrity_tfm);
 		err = drbd_recv_all_warn(peer_device->connection, dig_in, digest_size);
 		if (err)
 			return err;
@@ -3542,7 +3542,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
 	int p_proto, p_discard_my_data, p_two_primaries, cf;
 	struct net_conf *nc, *old_net_conf, *new_net_conf = NULL;
 	char integrity_alg[SHARED_SECRET_MAX] = "";
-	struct crypto_ahash *peer_integrity_tfm = NULL;
+	struct crypto_shash *peer_integrity_tfm = NULL;
 	void *int_dig_in = NULL, *int_dig_vv = NULL;
 
 	p_proto		= be32_to_cpu(p->protocol);
@@ -3623,7 +3623,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
 		 * change.
 		 */
 
-		peer_integrity_tfm = crypto_alloc_ahash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
+		peer_integrity_tfm = crypto_alloc_shash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
 		if (IS_ERR(peer_integrity_tfm)) {
 			peer_integrity_tfm = NULL;
 			drbd_err(connection, "peer data-integrity-alg %s not supported\n",
@@ -3631,7 +3631,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
 			goto disconnect;
 		}
 
-		hash_size = crypto_ahash_digestsize(peer_integrity_tfm);
+		hash_size = crypto_shash_digestsize(peer_integrity_tfm);
 		int_dig_in = kmalloc(hash_size, GFP_KERNEL);
 		int_dig_vv = kmalloc(hash_size, GFP_KERNEL);
 		if (!(int_dig_in && int_dig_vv)) {
@@ -3661,7 +3661,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
 	mutex_unlock(&connection->resource->conf_update);
 	mutex_unlock(&connection->data.mutex);
 
-	crypto_free_ahash(connection->peer_integrity_tfm);
+	crypto_free_shash(connection->peer_integrity_tfm);
 	kfree(connection->int_dig_in);
 	kfree(connection->int_dig_vv);
 	connection->peer_integrity_tfm = peer_integrity_tfm;
@@ -3679,7 +3679,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
 disconnect_rcu_unlock:
 	rcu_read_unlock();
 disconnect:
-	crypto_free_ahash(peer_integrity_tfm);
+	crypto_free_shash(peer_integrity_tfm);
 	kfree(int_dig_in);
 	kfree(int_dig_vv);
 	conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_HARD);
@@ -3691,15 +3691,16 @@ disconnect:
  * return: NULL (alg name was "")
  *         ERR_PTR(error) if something goes wrong
  *         or the crypto hash ptr, if it worked out ok. */
-static struct crypto_ahash *drbd_crypto_alloc_digest_safe(const struct drbd_device *device,
+static struct crypto_shash *drbd_crypto_alloc_digest_safe(
+		const struct drbd_device *device,
 		const char *alg, const char *name)
 {
-	struct crypto_ahash *tfm;
+	struct crypto_shash *tfm;
 
 	if (!alg[0])
 		return NULL;
 
-	tfm = crypto_alloc_ahash(alg, 0, CRYPTO_ALG_ASYNC);
+	tfm = crypto_alloc_shash(alg, 0, 0);
 	if (IS_ERR(tfm)) {
 		drbd_err(device, "Can not allocate \"%s\" as %s (reason: %ld)\n",
 			alg, name, PTR_ERR(tfm));
@@ -3752,8 +3753,8 @@ static int receive_SyncParam(struct drbd_connection *connection, struct packet_i
 	struct drbd_device *device;
 	struct p_rs_param_95 *p;
 	unsigned int header_size, data_size, exp_max_sz;
-	struct crypto_ahash *verify_tfm = NULL;
-	struct crypto_ahash *csums_tfm = NULL;
+	struct crypto_shash *verify_tfm = NULL;
+	struct crypto_shash *csums_tfm = NULL;
 	struct net_conf *old_net_conf, *new_net_conf = NULL;
 	struct disk_conf *old_disk_conf = NULL, *new_disk_conf = NULL;
 	const int apv = connection->agreed_pro_version;
@@ -3900,14 +3901,14 @@ static int receive_SyncParam(struct drbd_connection *connection, struct packet_i
 			if (verify_tfm) {
 				strcpy(new_net_conf->verify_alg, p->verify_alg);
 				new_net_conf->verify_alg_len = strlen(p->verify_alg) + 1;
-				crypto_free_ahash(peer_device->connection->verify_tfm);
+				crypto_free_shash(peer_device->connection->verify_tfm);
 				peer_device->connection->verify_tfm = verify_tfm;
 				drbd_info(device, "using verify-alg: \"%s\"\n", p->verify_alg);
 			}
 			if (csums_tfm) {
 				strcpy(new_net_conf->csums_alg, p->csums_alg);
 				new_net_conf->csums_alg_len = strlen(p->csums_alg) + 1;
-				crypto_free_ahash(peer_device->connection->csums_tfm);
+				crypto_free_shash(peer_device->connection->csums_tfm);
 				peer_device->connection->csums_tfm = csums_tfm;
 				drbd_info(device, "using csums-alg: \"%s\"\n", p->csums_alg);
 			}
@@ -3951,9 +3952,9 @@ disconnect:
 	mutex_unlock(&connection->resource->conf_update);
 	/* just for completeness: actually not needed,
 	 * as this is not reached if csums_tfm was ok. */
-	crypto_free_ahash(csums_tfm);
+	crypto_free_shash(csums_tfm);
 	/* but free the verify_tfm again, if csums_tfm did not work out */
-	crypto_free_ahash(verify_tfm);
+	crypto_free_shash(verify_tfm);
 	conn_request_state(peer_device->connection, NS(conn, C_DISCONNECTING), CS_HARD);
 	return -EIO;
 }

drivers/block/drbd/drbd_req.c

@@ -650,7 +650,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
 	case DISCARD_COMPLETED_NOTSUPP:
 	case DISCARD_COMPLETED_WITH_ERROR:
 		/* I'd rather not detach from local disk just because it
-		 * failed a REQ_DISCARD. */
+		 * failed a REQ_OP_DISCARD. */
 		mod_rq_state(req, m, RQ_LOCAL_PENDING, RQ_LOCAL_COMPLETED);
 		break;
 

drivers/block/drbd/drbd_worker.c

@@ -152,7 +152,7 @@ void drbd_endio_write_sec_final(struct drbd_peer_request *peer_req) __releases(l
 
 	do_wake = list_empty(block_id == ID_SYNCER ? &device->sync_ee : &device->active_ee);
 
-	/* FIXME do we want to detach for failed REQ_DISCARD?
+	/* FIXME do we want to detach for failed REQ_OP_DISCARD?
 	 * ((peer_req->flags & (EE_WAS_ERROR|EE_IS_TRIM)) == EE_WAS_ERROR) */
 	if (peer_req->flags & EE_WAS_ERROR)
 		__drbd_chk_io_error(device, DRBD_WRITE_ERROR);
@@ -295,60 +295,61 @@ void drbd_request_endio(struct bio *bio)
 		complete_master_bio(device, &m);
 }
 
-void drbd_csum_ee(struct crypto_ahash *tfm, struct drbd_peer_request *peer_req, void *digest)
+void drbd_csum_ee(struct crypto_shash *tfm, struct drbd_peer_request *peer_req, void *digest)
 {
-	AHASH_REQUEST_ON_STACK(req, tfm);
-	struct scatterlist sg;
+	SHASH_DESC_ON_STACK(desc, tfm);
 	struct page *page = peer_req->pages;
 	struct page *tmp;
 	unsigned len;
+	void *src;
 
-	ahash_request_set_tfm(req, tfm);
-	ahash_request_set_callback(req, 0, NULL, NULL);
+	desc->tfm = tfm;
+	desc->flags = 0;
 
-	sg_init_table(&sg, 1);
-	crypto_ahash_init(req);
+	crypto_shash_init(desc);
 
+	src = kmap_atomic(page);
 	while ((tmp = page_chain_next(page))) {
 		/* all but the last page will be fully used */
-		sg_set_page(&sg, page, PAGE_SIZE, 0);
-		ahash_request_set_crypt(req, &sg, NULL, sg.length);
-		crypto_ahash_update(req);
+		crypto_shash_update(desc, src, PAGE_SIZE);
+		kunmap_atomic(src);
 		page = tmp;
+		src = kmap_atomic(page);
 	}
 	/* and now the last, possibly only partially used page */
 	len = peer_req->i.size & (PAGE_SIZE - 1);
-	sg_set_page(&sg, page, len ?: PAGE_SIZE, 0);
-	ahash_request_set_crypt(req, &sg, digest, sg.length);
-	crypto_ahash_finup(req);
-	ahash_request_zero(req);
+	crypto_shash_update(desc, src, len ?: PAGE_SIZE);
+	kunmap_atomic(src);
+
+	crypto_shash_final(desc, digest);
+	shash_desc_zero(desc);
 }
 
-void drbd_csum_bio(struct crypto_ahash *tfm, struct bio *bio, void *digest)
+void drbd_csum_bio(struct crypto_shash *tfm, struct bio *bio, void *digest)
 {
-	AHASH_REQUEST_ON_STACK(req, tfm);
-	struct scatterlist sg;
+	SHASH_DESC_ON_STACK(desc, tfm);
 	struct bio_vec bvec;
 	struct bvec_iter iter;
 
-	ahash_request_set_tfm(req, tfm);
-	ahash_request_set_callback(req, 0, NULL, NULL);
+	desc->tfm = tfm;
+	desc->flags = 0;
 
-	sg_init_table(&sg, 1);
-	crypto_ahash_init(req);
+	crypto_shash_init(desc);
 
 	bio_for_each_segment(bvec, bio, iter) {
-		sg_set_page(&sg, bvec.bv_page, bvec.bv_len, bvec.bv_offset);
-		ahash_request_set_crypt(req, &sg, NULL, sg.length);
-		crypto_ahash_update(req);
+		u8 *src;
+
+		src = kmap_atomic(bvec.bv_page);
+		crypto_shash_update(desc, src + bvec.bv_offset, bvec.bv_len);
+		kunmap_atomic(src);
+
 		/* REQ_OP_WRITE_SAME has only one segment,
 		 * checksum the payload only once. */
 		if (bio_op(bio) == REQ_OP_WRITE_SAME)
 			break;
 	}
-	ahash_request_set_crypt(req, NULL, digest, 0);
-	crypto_ahash_final(req);
-	ahash_request_zero(req);
+	crypto_shash_final(desc, digest);
+	shash_desc_zero(desc);
 }
 
 /* MAYBE merge common code with w_e_end_ov_req */
@@ -367,7 +368,7 @@ static int w_e_send_csum(struct drbd_work *w, int cancel)
 	if (unlikely((peer_req->flags & EE_WAS_ERROR) != 0))
 		goto out;
 
-	digest_size = crypto_ahash_digestsize(peer_device->connection->csums_tfm);
+	digest_size = crypto_shash_digestsize(peer_device->connection->csums_tfm);
 	digest = kmalloc(digest_size, GFP_NOIO);
 	if (digest) {
 		sector_t sector = peer_req->i.sector;
@@ -1205,7 +1206,7 @@ int w_e_end_csum_rs_req(struct drbd_work *w, int cancel)
 		 * a real fix would be much more involved,
 		 * introducing more locking mechanisms */
 		if (peer_device->connection->csums_tfm) {
-			digest_size = crypto_ahash_digestsize(peer_device->connection->csums_tfm);
+			digest_size = crypto_shash_digestsize(peer_device->connection->csums_tfm);
 			D_ASSERT(device, digest_size == di->digest_size);
 			digest = kmalloc(digest_size, GFP_NOIO);
 		}
@@ -1255,7 +1256,7 @@ int w_e_end_ov_req(struct drbd_work *w, int cancel)
 	if (unlikely(cancel))
 		goto out;
 
-	digest_size = crypto_ahash_digestsize(peer_device->connection->verify_tfm);
+	digest_size = crypto_shash_digestsize(peer_device->connection->verify_tfm);
 	digest = kmalloc(digest_size, GFP_NOIO);
 	if (!digest) {
 		err = 1;	/* terminate the connection in case the allocation failed */
@@ -1327,7 +1328,7 @@ int w_e_end_ov_reply(struct drbd_work *w, int cancel)
 	di = peer_req->digest;
 
 	if (likely((peer_req->flags & EE_WAS_ERROR) == 0)) {
-		digest_size = crypto_ahash_digestsize(peer_device->connection->verify_tfm);
+		digest_size = crypto_shash_digestsize(peer_device->connection->verify_tfm);
 		digest = kmalloc(digest_size, GFP_NOIO);
 		if (digest) {
 			drbd_csum_ee(peer_device->connection->verify_tfm, peer_req, digest);

drivers/block/floppy.c

@@ -252,13 +252,13 @@ static int allowed_drive_mask = 0x33;
 
 static int irqdma_allocated;
 
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/blkpg.h>
 #include <linux/cdrom.h>	/* for the compatibility eject ioctl */
 #include <linux/completion.h>
 
+static LIST_HEAD(floppy_reqs);
 static struct request *current_req;
-static void do_fd_request(struct request_queue *q);
 static int set_next_request(void);
 
 #ifndef fd_get_dma_residue
@@ -414,10 +414,10 @@ static struct floppy_drive_struct drive_state[N_DRIVE];
 static struct floppy_write_errors write_errors[N_DRIVE];
 static struct timer_list motor_off_timer[N_DRIVE];
 static struct gendisk *disks[N_DRIVE];
+static struct blk_mq_tag_set tag_sets[N_DRIVE];
 static struct block_device *opened_bdev[N_DRIVE];
 static DEFINE_MUTEX(open_lock);
 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
-static int fdc_queue;
 
 /*
  * This struct defines the different floppy types.
@@ -2216,8 +2216,9 @@ static void floppy_end_request(struct request *req, blk_status_t error)
 	/* current_count_sectors can be zero if transfer failed */
 	if (error)
 		nr_sectors = blk_rq_cur_sectors(req);
-	if (__blk_end_request(req, error, nr_sectors << 9))
+	if (blk_update_request(req, error, nr_sectors << 9))
 		return;
+	__blk_mq_end_request(req, error);
 
 	/* We're done with the request */
 	floppy_off(drive);
@@ -2797,27 +2798,14 @@ static int make_raw_rw_request(void)
 	return 2;
 }
 
-/*
- * Round-robin between our available drives, doing one request from each
- */
 static int set_next_request(void)
 {
-	struct request_queue *q;
-	int old_pos = fdc_queue;
-
-	do {
-		q = disks[fdc_queue]->queue;
-		if (++fdc_queue == N_DRIVE)
-			fdc_queue = 0;
-		if (q) {
-			current_req = blk_fetch_request(q);
-			if (current_req) {
-				current_req->error_count = 0;
-				break;
-			}
-		}
-	} while (fdc_queue != old_pos);
-
+	current_req = list_first_entry_or_null(&floppy_reqs, struct request,
+					       queuelist);
+	if (current_req) {
+		current_req->error_count = 0;
+		list_del_init(&current_req->queuelist);
+	}
 	return current_req != NULL;
 }
 
@@ -2901,29 +2889,38 @@ static void process_fd_request(void)
 	schedule_bh(redo_fd_request);
 }
 
-static void do_fd_request(struct request_queue *q)
+static blk_status_t floppy_queue_rq(struct blk_mq_hw_ctx *hctx,
+				    const struct blk_mq_queue_data *bd)
 {
+	blk_mq_start_request(bd->rq);
+
 	if (WARN(max_buffer_sectors == 0,
 		 "VFS: %s called on non-open device\n", __func__))
-		return;
+		return BLK_STS_IOERR;
 
 	if (WARN(atomic_read(&usage_count) == 0,
 		 "warning: usage count=0, current_req=%p sect=%ld flags=%llx\n",
 		 current_req, (long)blk_rq_pos(current_req),
 		 (unsigned long long) current_req->cmd_flags))
-		return;
+		return BLK_STS_IOERR;
+
+	spin_lock_irq(&floppy_lock);
+	list_add_tail(&bd->rq->queuelist, &floppy_reqs);
+	spin_unlock_irq(&floppy_lock);
 
 	if (test_and_set_bit(0, &fdc_busy)) {
 		/* fdc busy, this new request will be treated when the
 		   current one is done */
 		is_alive(__func__, "old request running");
-		return;
+		return BLK_STS_OK;
 	}
+
 	command_status = FD_COMMAND_NONE;
 	__reschedule_timeout(MAXTIMEOUT, "fd_request");
 	set_fdc(0);
 	process_fd_request();
 	is_alive(__func__, "");
+	return BLK_STS_OK;
 }
 
 static const struct cont_t poll_cont = {
@@ -4486,6 +4483,10 @@ static struct platform_driver floppy_driver = {
 	},
 };
 
+static const struct blk_mq_ops floppy_mq_ops = {
+	.queue_rq = floppy_queue_rq,
+};
+
 static struct platform_device floppy_device[N_DRIVE];
 
 static bool floppy_available(int drive)
@@ -4533,9 +4534,12 @@ static int __init do_floppy_init(void)
 			goto out_put_disk;
 		}
 
-		disks[drive]->queue = blk_init_queue(do_fd_request, &floppy_lock);
-		if (!disks[drive]->queue) {
-			err = -ENOMEM;
+		disks[drive]->queue = blk_mq_init_sq_queue(&tag_sets[drive],
+							   &floppy_mq_ops, 2,
+							   BLK_MQ_F_SHOULD_MERGE);
+		if (IS_ERR(disks[drive]->queue)) {
+			err = PTR_ERR(disks[drive]->queue);
+			disks[drive]->queue = NULL;
 			goto out_put_disk;
 		}
 
@@ -4679,7 +4683,7 @@ static int __init do_floppy_init(void)
 		/* to be cleaned up... */
 		disks[drive]->private_data = (void *)(long)drive;
 		disks[drive]->flags |= GENHD_FL_REMOVABLE;
-		device_add_disk(&floppy_device[drive].dev, disks[drive]);
+		device_add_disk(&floppy_device[drive].dev, disks[drive], NULL);
 	}
 
 	return 0;
@@ -4708,6 +4712,7 @@ out_put_disk:
 			del_timer_sync(&motor_off_timer[drive]);
 			blk_cleanup_queue(disks[drive]->queue);
 			disks[drive]->queue = NULL;
+			blk_mq_free_tag_set(&tag_sets[drive]);
 		}
 		put_disk(disks[drive]);
 	}
@@ -4935,6 +4940,7 @@ static void __exit floppy_module_exit(void)
 			platform_device_unregister(&floppy_device[drive]);
 		}
 		blk_cleanup_queue(disks[drive]->queue);
+		blk_mq_free_tag_set(&tag_sets[drive]);
 
 		/*
 		 * These disks have not called add_disk().  Don't put down

drivers/block/loop.c

@@ -77,6 +77,7 @@
 #include <linux/falloc.h>
 #include <linux/uio.h>
 #include <linux/ioprio.h>
+#include <linux/blk-cgroup.h>
 
 #include "loop.h"
 
@@ -1760,8 +1761,8 @@ static blk_status_t loop_queue_rq(struct blk_mq_hw_ctx *hctx,
 
 	/* always use the first bio's css */
 #ifdef CONFIG_BLK_CGROUP
-	if (cmd->use_aio && rq->bio && rq->bio->bi_css) {
-		cmd->css = rq->bio->bi_css;
+	if (cmd->use_aio && rq->bio && rq->bio->bi_blkg) {
+		cmd->css = &bio_blkcg(rq->bio)->css;
 		css_get(cmd->css);
 	} else
 #endif

drivers/block/mtip32xx/mtip32xx.c

@@ -1862,11 +1862,9 @@ static int exec_drive_taskfile(struct driver_data *dd,
 		if (IS_ERR(outbuf))
 			return PTR_ERR(outbuf);
 
-		outbuf_dma = pci_map_single(dd->pdev,
-					 outbuf,
-					 taskout,
-					 DMA_TO_DEVICE);
-		if (pci_dma_mapping_error(dd->pdev, outbuf_dma)) {
+		outbuf_dma = dma_map_single(&dd->pdev->dev, outbuf,
+					    taskout, DMA_TO_DEVICE);
+		if (dma_mapping_error(&dd->pdev->dev, outbuf_dma)) {
 			err = -ENOMEM;
 			goto abort;
 		}
@@ -1880,10 +1878,9 @@ static int exec_drive_taskfile(struct driver_data *dd,
 			inbuf = NULL;
 			goto abort;
 		}
-		inbuf_dma = pci_map_single(dd->pdev,
-					 inbuf,
-					 taskin, DMA_FROM_DEVICE);
-		if (pci_dma_mapping_error(dd->pdev, inbuf_dma)) {
+		inbuf_dma = dma_map_single(&dd->pdev->dev, inbuf,
+					   taskin, DMA_FROM_DEVICE);
+		if (dma_mapping_error(&dd->pdev->dev, inbuf_dma)) {
 			err = -ENOMEM;
 			goto abort;
 		}
@@ -2002,11 +1999,11 @@ static int exec_drive_taskfile(struct driver_data *dd,
 
 	/* reclaim the DMA buffers.*/
 	if (inbuf_dma)
-		pci_unmap_single(dd->pdev, inbuf_dma,
-			taskin, DMA_FROM_DEVICE);
+		dma_unmap_single(&dd->pdev->dev, inbuf_dma, taskin,
+				 DMA_FROM_DEVICE);
 	if (outbuf_dma)
-		pci_unmap_single(dd->pdev, outbuf_dma,
-			taskout, DMA_TO_DEVICE);
+		dma_unmap_single(&dd->pdev->dev, outbuf_dma, taskout,
+				 DMA_TO_DEVICE);
 	inbuf_dma  = 0;
 	outbuf_dma = 0;
 
@@ -2053,11 +2050,11 @@ static int exec_drive_taskfile(struct driver_data *dd,
 	}
 abort:
 	if (inbuf_dma)
-		pci_unmap_single(dd->pdev, inbuf_dma,
-					taskin, DMA_FROM_DEVICE);
+		dma_unmap_single(&dd->pdev->dev, inbuf_dma, taskin,
+				 DMA_FROM_DEVICE);
 	if (outbuf_dma)
-		pci_unmap_single(dd->pdev, outbuf_dma,
-					taskout, DMA_TO_DEVICE);
+		dma_unmap_single(&dd->pdev->dev, outbuf_dma, taskout,
+				 DMA_TO_DEVICE);
 	kfree(outbuf);
 	kfree(inbuf);
 
@@ -3861,7 +3858,7 @@ skip_create_disk:
 	set_capacity(dd->disk, capacity);
 
 	/* Enable the block device and add it to /dev */
-	device_add_disk(&dd->pdev->dev, dd->disk);
+	device_add_disk(&dd->pdev->dev, dd->disk, NULL);
 
 	dd->bdev = bdget_disk(dd->disk, 0);
 	/*
@@ -4216,18 +4213,10 @@ static int mtip_pci_probe(struct pci_dev *pdev,
 		goto iomap_err;
 	}
 
-	if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
-		rv = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
-
-		if (rv) {
-			rv = pci_set_consistent_dma_mask(pdev,
-						DMA_BIT_MASK(32));
-			if (rv) {
-				dev_warn(&pdev->dev,
-					"64-bit DMA enable failed\n");
-				goto setmask_err;
-			}
-		}
+	rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (rv) {
+		dev_warn(&pdev->dev, "64-bit DMA enable failed\n");
+		goto setmask_err;
 	}
 
 	/* Copy the info we may need later into the private data structure. */

drivers/block/null_blk_main.c

@@ -606,20 +606,12 @@ static struct nullb_cmd *alloc_cmd(struct nullb_queue *nq, int can_wait)
 
 static void end_cmd(struct nullb_cmd *cmd)
 {
-	struct request_queue *q = NULL;
 	int queue_mode = cmd->nq->dev->queue_mode;
 
-	if (cmd->rq)
-		q = cmd->rq->q;
-
 	switch (queue_mode)  {
 	case NULL_Q_MQ:
 		blk_mq_end_request(cmd->rq, cmd->error);
 		return;
-	case NULL_Q_RQ:
-		INIT_LIST_HEAD(&cmd->rq->queuelist);
-		blk_end_request_all(cmd->rq, cmd->error);
-		break;
 	case NULL_Q_BIO:
 		cmd->bio->bi_status = cmd->error;
 		bio_endio(cmd->bio);
@@ -627,15 +619,6 @@ static void end_cmd(struct nullb_cmd *cmd)
 	}
 
 	free_cmd(cmd);
-
-	/* Restart queue if needed, as we are freeing a tag */
-	if (queue_mode == NULL_Q_RQ && blk_queue_stopped(q)) {
-		unsigned long flags;
-
-		spin_lock_irqsave(q->queue_lock, flags);
-		blk_start_queue_async(q);
-		spin_unlock_irqrestore(q->queue_lock, flags);
-	}
 }
 
 static enum hrtimer_restart null_cmd_timer_expired(struct hrtimer *timer)
@@ -1136,25 +1119,14 @@ static void null_stop_queue(struct nullb *nullb)
 
 	if (nullb->dev->queue_mode == NULL_Q_MQ)
 		blk_mq_stop_hw_queues(q);
-	else {
-		spin_lock_irq(q->queue_lock);
-		blk_stop_queue(q);
-		spin_unlock_irq(q->queue_lock);
-	}
 }
 
 static void null_restart_queue_async(struct nullb *nullb)
 {
 	struct request_queue *q = nullb->q;
-	unsigned long flags;
 
 	if (nullb->dev->queue_mode == NULL_Q_MQ)
 		blk_mq_start_stopped_hw_queues(q, true);
-	else {
-		spin_lock_irqsave(q->queue_lock, flags);
-		blk_start_queue_async(q);
-		spin_unlock_irqrestore(q->queue_lock, flags);
-	}
 }
 
 static bool cmd_report_zone(struct nullb *nullb, struct nullb_cmd *cmd)
@@ -1197,17 +1169,8 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd)
 			/* race with timer */
 			if (atomic_long_read(&nullb->cur_bytes) > 0)
 				null_restart_queue_async(nullb);
-			if (dev->queue_mode == NULL_Q_RQ) {
-				struct request_queue *q = nullb->q;
-
-				spin_lock_irq(q->queue_lock);
-				rq->rq_flags |= RQF_DONTPREP;
-				blk_requeue_request(q, rq);
-				spin_unlock_irq(q->queue_lock);
-				return BLK_STS_OK;
-			} else
-				/* requeue request */
-				return BLK_STS_DEV_RESOURCE;
+			/* requeue request */
+			return BLK_STS_DEV_RESOURCE;
 		}
 	}
 
@@ -1278,9 +1241,6 @@ out:
 		case NULL_Q_MQ:
 			blk_mq_complete_request(cmd->rq);
 			break;
-		case NULL_Q_RQ:
-			blk_complete_request(cmd->rq);
-			break;
 		case NULL_Q_BIO:
 			/*
 			 * XXX: no proper submitting cpu information available.
@@ -1349,30 +1309,6 @@ static blk_qc_t null_queue_bio(struct request_queue *q, struct bio *bio)
 	return BLK_QC_T_NONE;
 }
 
-static enum blk_eh_timer_return null_rq_timed_out_fn(struct request *rq)
-{
-	pr_info("null: rq %p timed out\n", rq);
-	__blk_complete_request(rq);
-	return BLK_EH_DONE;
-}
-
-static int null_rq_prep_fn(struct request_queue *q, struct request *req)
-{
-	struct nullb *nullb = q->queuedata;
-	struct nullb_queue *nq = nullb_to_queue(nullb);
-	struct nullb_cmd *cmd;
-
-	cmd = alloc_cmd(nq, 0);
-	if (cmd) {
-		cmd->rq = req;
-		req->special = cmd;
-		return BLKPREP_OK;
-	}
-	blk_stop_queue(q);
-
-	return BLKPREP_DEFER;
-}
-
 static bool should_timeout_request(struct request *rq)
 {
 #ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION
@@ -1391,27 +1327,6 @@ static bool should_requeue_request(struct request *rq)
 	return false;
 }
 
-static void null_request_fn(struct request_queue *q)
-{
-	struct request *rq;
-
-	while ((rq = blk_fetch_request(q)) != NULL) {
-		struct nullb_cmd *cmd = rq->special;
-
-		/* just ignore the request */
-		if (should_timeout_request(rq))
-			continue;
-		if (should_requeue_request(rq)) {
-			blk_requeue_request(q, rq);
-			continue;
-		}
-
-		spin_unlock_irq(q->queue_lock);
-		null_handle_cmd(cmd);
-		spin_lock_irq(q->queue_lock);
-	}
-}
-
 static enum blk_eh_timer_return null_timeout_rq(struct request *rq, bool res)
 {
 	pr_info("null: rq %p timed out\n", rq);
@@ -1766,24 +1681,6 @@ static int null_add_dev(struct nullb_device *dev)
 		rv = init_driver_queues(nullb);
 		if (rv)
 			goto out_cleanup_blk_queue;
-	} else {
-		nullb->q = blk_init_queue_node(null_request_fn, &nullb->lock,
-						dev->home_node);
-		if (!nullb->q) {
-			rv = -ENOMEM;
-			goto out_cleanup_queues;
-		}
-
-		if (!null_setup_fault())
-			goto out_cleanup_blk_queue;
-
-		blk_queue_prep_rq(nullb->q, null_rq_prep_fn);
-		blk_queue_softirq_done(nullb->q, null_softirq_done_fn);
-		blk_queue_rq_timed_out(nullb->q, null_rq_timed_out_fn);
-		nullb->q->rq_timeout = 5 * HZ;
-		rv = init_driver_queues(nullb);
-		if (rv)
-			goto out_cleanup_blk_queue;
 	}
 
 	if (dev->mbps) {
@@ -1865,6 +1762,10 @@ static int __init null_init(void)
 		return -EINVAL;
 	}
 
+	if (g_queue_mode == NULL_Q_RQ) {
+		pr_err("null_blk: legacy IO path no longer available\n");
+		return -EINVAL;
+	}
 	if (g_queue_mode == NULL_Q_MQ && g_use_per_node_hctx) {
 		if (g_submit_queues != nr_online_nodes) {
 			pr_warn("null_blk: submit_queues param is set to %u.\n",

drivers/block/paride/pcd.c

@@ -137,7 +137,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
 #include <linux/delay.h>
 #include <linux/cdrom.h>
 #include <linux/spinlock.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/mutex.h>
 #include <linux/uaccess.h>
 
@@ -186,7 +186,8 @@ static int pcd_packet(struct cdrom_device_info *cdi,
 static int pcd_detect(void);
 static void pcd_probe_capabilities(void);
 static void do_pcd_read_drq(void);
-static void do_pcd_request(struct request_queue * q);
+static blk_status_t pcd_queue_rq(struct blk_mq_hw_ctx *hctx,
+				 const struct blk_mq_queue_data *bd);
 static void do_pcd_read(void);
 
 struct pcd_unit {
@@ -199,6 +200,8 @@ struct pcd_unit {
 	char *name;		/* pcd0, pcd1, etc */
 	struct cdrom_device_info info;	/* uniform cdrom interface */
 	struct gendisk *disk;
+	struct blk_mq_tag_set tag_set;
+	struct list_head rq_list;
 };
 
 static struct pcd_unit pcd[PCD_UNITS];
@@ -292,6 +295,10 @@ static const struct cdrom_device_ops pcd_dops = {
 			  CDC_CD_RW,
 };
 
+static const struct blk_mq_ops pcd_mq_ops = {
+	.queue_rq	= pcd_queue_rq,
+};
+
 static void pcd_init_units(void)
 {
 	struct pcd_unit *cd;
@@ -300,13 +307,19 @@ static void pcd_init_units(void)
 	pcd_drive_count = 0;
 	for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
 		struct gendisk *disk = alloc_disk(1);
+
 		if (!disk)
 			continue;
-		disk->queue = blk_init_queue(do_pcd_request, &pcd_lock);
-		if (!disk->queue) {
-			put_disk(disk);
+
+		disk->queue = blk_mq_init_sq_queue(&cd->tag_set, &pcd_mq_ops,
+						   1, BLK_MQ_F_SHOULD_MERGE);
+		if (IS_ERR(disk->queue)) {
+			disk->queue = NULL;
 			continue;
 		}
+
+		INIT_LIST_HEAD(&cd->rq_list);
+		disk->queue->queuedata = cd;
 		blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
 		cd->disk = disk;
 		cd->pi = &cd->pia;
@@ -748,18 +761,18 @@ static int pcd_queue;
 static int set_next_request(void)
 {
 	struct pcd_unit *cd;
-	struct request_queue *q;
 	int old_pos = pcd_queue;
 
 	do {
 		cd = &pcd[pcd_queue];
-		q = cd->present ? cd->disk->queue : NULL;
 		if (++pcd_queue == PCD_UNITS)
 			pcd_queue = 0;
-		if (q) {
-			pcd_req = blk_fetch_request(q);
-			if (pcd_req)
-				break;
+		if (cd->present && !list_empty(&cd->rq_list)) {
+			pcd_req = list_first_entry(&cd->rq_list, struct request,
+							queuelist);
+			list_del_init(&pcd_req->queuelist);
+			blk_mq_start_request(pcd_req);
+			break;
 		}
 	} while (pcd_queue != old_pos);
 
@@ -768,33 +781,41 @@ static int set_next_request(void)
 
 static void pcd_request(void)
 {
+	struct pcd_unit *cd;
+
 	if (pcd_busy)
 		return;
-	while (1) {
-		if (!pcd_req && !set_next_request())
-			return;
 
-		if (rq_data_dir(pcd_req) == READ) {
-			struct pcd_unit *cd = pcd_req->rq_disk->private_data;
-			if (cd != pcd_current)
-				pcd_bufblk = -1;
-			pcd_current = cd;
-			pcd_sector = blk_rq_pos(pcd_req);
-			pcd_count = blk_rq_cur_sectors(pcd_req);
-			pcd_buf = bio_data(pcd_req->bio);
-			pcd_busy = 1;
-			ps_set_intr(do_pcd_read, NULL, 0, nice);
-			return;
-		} else {
-			__blk_end_request_all(pcd_req, BLK_STS_IOERR);
-			pcd_req = NULL;
-		}
-	}
+	if (!pcd_req && !set_next_request())
+		return;
+
+	cd = pcd_req->rq_disk->private_data;
+	if (cd != pcd_current)
+		pcd_bufblk = -1;
+	pcd_current = cd;
+	pcd_sector = blk_rq_pos(pcd_req);
+	pcd_count = blk_rq_cur_sectors(pcd_req);
+	pcd_buf = bio_data(pcd_req->bio);
+	pcd_busy = 1;
+	ps_set_intr(do_pcd_read, NULL, 0, nice);
 }
 
-static void do_pcd_request(struct request_queue *q)
+static blk_status_t pcd_queue_rq(struct blk_mq_hw_ctx *hctx,
+				 const struct blk_mq_queue_data *bd)
 {
+	struct pcd_unit *cd = hctx->queue->queuedata;
+
+	if (rq_data_dir(bd->rq) != READ) {
+		blk_mq_start_request(bd->rq);
+		return BLK_STS_IOERR;
+	}
+
+	spin_lock_irq(&pcd_lock);
+	list_add_tail(&bd->rq->queuelist, &cd->rq_list);
 	pcd_request();
+	spin_unlock_irq(&pcd_lock);
+
+	return BLK_STS_OK;
 }
 
 static inline void next_request(blk_status_t err)
@@ -802,8 +823,10 @@ static inline void next_request(blk_status_t err)
 	unsigned long saved_flags;
 
 	spin_lock_irqsave(&pcd_lock, saved_flags);
-	if (!__blk_end_request_cur(pcd_req, err))
+	if (!blk_update_request(pcd_req, err, blk_rq_cur_bytes(pcd_req))) {
+		__blk_mq_end_request(pcd_req, err);
 		pcd_req = NULL;
+	}
 	pcd_busy = 0;
 	pcd_request();
 	spin_unlock_irqrestore(&pcd_lock, saved_flags);
@@ -1011,6 +1034,7 @@ static void __exit pcd_exit(void)
 			unregister_cdrom(&cd->info);
 		}
 		blk_cleanup_queue(cd->disk->queue);
+		blk_mq_free_tag_set(&cd->tag_set);
 		put_disk(cd->disk);
 	}
 	unregister_blkdev(major, name);

drivers/block/paride/pd.c

@@ -151,7 +151,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_GEO, D_SBY, D_DLY, D_SLV};
 #include <linux/delay.h>
 #include <linux/hdreg.h>
 #include <linux/cdrom.h>	/* for the eject ioctl */
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/blkpg.h>
 #include <linux/kernel.h>
 #include <linux/mutex.h>
@@ -236,6 +236,8 @@ struct pd_unit {
 	int alt_geom;
 	char name[PD_NAMELEN];	/* pda, pdb, etc ... */
 	struct gendisk *gd;
+	struct blk_mq_tag_set tag_set;
+	struct list_head rq_list;
 };
 
 static struct pd_unit pd[PD_UNITS];
@@ -399,9 +401,17 @@ static int set_next_request(void)
 		if (++pd_queue == PD_UNITS)
 			pd_queue = 0;
 		if (q) {
-			pd_req = blk_fetch_request(q);
-			if (pd_req)
-				break;
+			struct pd_unit *disk = q->queuedata;
+
+			if (list_empty(&disk->rq_list))
+				continue;
+
+			pd_req = list_first_entry(&disk->rq_list,
+							struct request,
+							queuelist);
+			list_del_init(&pd_req->queuelist);
+			blk_mq_start_request(pd_req);
+			break;
 		}
 	} while (pd_queue != old_pos);
 
@@ -412,7 +422,6 @@ static void run_fsm(void)
 {
 	while (1) {
 		enum action res;
-		unsigned long saved_flags;
 		int stop = 0;
 
 		if (!phase) {
@@ -433,19 +442,24 @@ static void run_fsm(void)
 		}
 
 		switch(res = phase()) {
-			case Ok: case Fail:
+			case Ok: case Fail: {
+				blk_status_t err;
+
+				err = res == Ok ? 0 : BLK_STS_IOERR;
 				pi_disconnect(pi_current);
 				pd_claimed = 0;
 				phase = NULL;
-				spin_lock_irqsave(&pd_lock, saved_flags);
-				if (!__blk_end_request_cur(pd_req,
-						res == Ok ? 0 : BLK_STS_IOERR)) {
-					if (!set_next_request())
-						stop = 1;
+				spin_lock_irq(&pd_lock);
+				if (!blk_update_request(pd_req, err,
+						blk_rq_cur_bytes(pd_req))) {
+					__blk_mq_end_request(pd_req, err);
+					pd_req = NULL;
+					stop = !set_next_request();
 				}
-				spin_unlock_irqrestore(&pd_lock, saved_flags);
+				spin_unlock_irq(&pd_lock);
 				if (stop)
 					return;
+				}
 				/* fall through */
 			case Hold:
 				schedule_fsm();
@@ -505,11 +519,17 @@ static int pd_next_buf(void)
 	if (pd_count)
 		return 0;
 	spin_lock_irqsave(&pd_lock, saved_flags);
-	__blk_end_request_cur(pd_req, 0);
-	pd_count = blk_rq_cur_sectors(pd_req);
-	pd_buf = bio_data(pd_req->bio);
+	if (!blk_update_request(pd_req, 0, blk_rq_cur_bytes(pd_req))) {
+		__blk_mq_end_request(pd_req, 0);
+		pd_req = NULL;
+		pd_count = 0;
+		pd_buf = NULL;
+	} else {
+		pd_count = blk_rq_cur_sectors(pd_req);
+		pd_buf = bio_data(pd_req->bio);
+	}
 	spin_unlock_irqrestore(&pd_lock, saved_flags);
-	return 0;
+	return !pd_count;
 }
 
 static unsigned long pd_timeout;
@@ -726,15 +746,21 @@ static enum action pd_identify(struct pd_unit *disk)
 
 /* end of io request engine */
 
-static void do_pd_request(struct request_queue * q)
+static blk_status_t pd_queue_rq(struct blk_mq_hw_ctx *hctx,
+				const struct blk_mq_queue_data *bd)
 {
-	if (pd_req)
-		return;
-	pd_req = blk_fetch_request(q);
-	if (!pd_req)
-		return;
+	struct pd_unit *disk = hctx->queue->queuedata;
+
+	spin_lock_irq(&pd_lock);
+	if (!pd_req) {
+		pd_req = bd->rq;
+		blk_mq_start_request(pd_req);
+	} else
+		list_add_tail(&bd->rq->queuelist, &disk->rq_list);
+	spin_unlock_irq(&pd_lock);
 
-	schedule_fsm();
+	run_fsm();
+	return BLK_STS_OK;
 }
 
 static int pd_special_command(struct pd_unit *disk,
@@ -847,23 +873,33 @@ static const struct block_device_operations pd_fops = {
 
 /* probing */
 
+static const struct blk_mq_ops pd_mq_ops = {
+	.queue_rq	= pd_queue_rq,
+};
+
 static void pd_probe_drive(struct pd_unit *disk)
 {
-	struct gendisk *p = alloc_disk(1 << PD_BITS);
+	struct gendisk *p;
+
+	p = alloc_disk(1 << PD_BITS);
 	if (!p)
 		return;
+
 	strcpy(p->disk_name, disk->name);
 	p->fops = &pd_fops;
 	p->major = major;
 	p->first_minor = (disk - pd) << PD_BITS;
 	disk->gd = p;
 	p->private_data = disk;
-	p->queue = blk_init_queue(do_pd_request, &pd_lock);
-	if (!p->queue) {
-		disk->gd = NULL;
-		put_disk(p);
+
+	p->queue = blk_mq_init_sq_queue(&disk->tag_set, &pd_mq_ops, 2,
+				BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING);
+	if (IS_ERR(p->queue)) {
+		p->queue = NULL;
 		return;
 	}
+
+	p->queue->queuedata = disk;
 	blk_queue_max_hw_sectors(p->queue, cluster);
 	blk_queue_bounce_limit(p->queue, BLK_BOUNCE_HIGH);
 
@@ -895,6 +931,7 @@ static int pd_detect(void)
 		disk->standby = parm[D_SBY];
 		if (parm[D_PRT])
 			pd_drive_count++;
+		INIT_LIST_HEAD(&disk->rq_list);
 	}
 
 	par_drv = pi_register_driver(name);
@@ -972,6 +1009,7 @@ static void __exit pd_exit(void)
 			disk->gd = NULL;
 			del_gendisk(p);
 			blk_cleanup_queue(p->queue);
+			blk_mq_free_tag_set(&disk->tag_set);
 			put_disk(p);
 			pi_release(disk->pi);
 		}

drivers/block/paride/pf.c

@@ -152,7 +152,7 @@ enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_LUN, D_DLY};
 #include <linux/hdreg.h>
 #include <linux/cdrom.h>
 #include <linux/spinlock.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/blkpg.h>
 #include <linux/mutex.h>
 #include <linux/uaccess.h>
@@ -206,7 +206,8 @@ module_param_array(drive3, int, NULL, 0);
 #define ATAPI_WRITE_10		0x2a
 
 static int pf_open(struct block_device *bdev, fmode_t mode);
-static void do_pf_request(struct request_queue * q);
+static blk_status_t pf_queue_rq(struct blk_mq_hw_ctx *hctx,
+				const struct blk_mq_queue_data *bd);
 static int pf_ioctl(struct block_device *bdev, fmode_t mode,
 		    unsigned int cmd, unsigned long arg);
 static int pf_getgeo(struct block_device *bdev, struct hd_geometry *geo);
@@ -238,6 +239,8 @@ struct pf_unit {
 	int present;		/* device present ? */
 	char name[PF_NAMELEN];	/* pf0, pf1, ... */
 	struct gendisk *disk;
+	struct blk_mq_tag_set tag_set;
+	struct list_head rq_list;
 };
 
 static struct pf_unit units[PF_UNITS];
@@ -277,6 +280,10 @@ static const struct block_device_operations pf_fops = {
 	.check_events	= pf_check_events,
 };
 
+static const struct blk_mq_ops pf_mq_ops = {
+	.queue_rq	= pf_queue_rq,
+};
+
 static void __init pf_init_units(void)
 {
 	struct pf_unit *pf;
@@ -284,14 +291,22 @@ static void __init pf_init_units(void)
 
 	pf_drive_count = 0;
 	for (unit = 0, pf = units; unit < PF_UNITS; unit++, pf++) {
-		struct gendisk *disk = alloc_disk(1);
+		struct gendisk *disk;
+
+		disk = alloc_disk(1);
 		if (!disk)
 			continue;
-		disk->queue = blk_init_queue(do_pf_request, &pf_spin_lock);
-		if (!disk->queue) {
+
+		disk->queue = blk_mq_init_sq_queue(&pf->tag_set, &pf_mq_ops,
+							1, BLK_MQ_F_SHOULD_MERGE);
+		if (IS_ERR(disk->queue)) {
 			put_disk(disk);
-			return;
+			disk->queue = NULL;
+			continue;
 		}
+
+		INIT_LIST_HEAD(&pf->rq_list);
+		disk->queue->queuedata = pf;
 		blk_queue_max_segments(disk->queue, cluster);
 		blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
 		pf->disk = disk;
@@ -784,18 +799,18 @@ static int pf_queue;
 static int set_next_request(void)
 {
 	struct pf_unit *pf;
-	struct request_queue *q;
 	int old_pos = pf_queue;
 
 	do {
 		pf = &units[pf_queue];
-		q = pf->present ? pf->disk->queue : NULL;
 		if (++pf_queue == PF_UNITS)
 			pf_queue = 0;
-		if (q) {
-			pf_req = blk_fetch_request(q);
-			if (pf_req)
-				break;
+		if (pf->present && !list_empty(&pf->rq_list)) {
+			pf_req = list_first_entry(&pf->rq_list, struct request,
+							queuelist);
+			list_del_init(&pf_req->queuelist);
+			blk_mq_start_request(pf_req);
+			break;
 		}
 	} while (pf_queue != old_pos);
 
@@ -804,8 +819,12 @@ static int set_next_request(void)
 
 static void pf_end_request(blk_status_t err)
 {
-	if (pf_req && !__blk_end_request_cur(pf_req, err))
+	if (!pf_req)
+		return;
+	if (!blk_update_request(pf_req, err, blk_rq_cur_bytes(pf_req))) {
+		__blk_mq_end_request(pf_req, err);
 		pf_req = NULL;
+	}
 }
 
 static void pf_request(void)
@@ -842,9 +861,17 @@ repeat:
 	}
 }
 
-static void do_pf_request(struct request_queue *q)
+static blk_status_t pf_queue_rq(struct blk_mq_hw_ctx *hctx,
+				const struct blk_mq_queue_data *bd)
 {
+	struct pf_unit *pf = hctx->queue->queuedata;
+
+	spin_lock_irq(&pf_spin_lock);
+	list_add_tail(&bd->rq->queuelist, &pf->rq_list);
 	pf_request();
+	spin_unlock_irq(&pf_spin_lock);
+
+	return BLK_STS_OK;
 }
 
 static int pf_next_buf(void)
@@ -1024,6 +1051,7 @@ static void __exit pf_exit(void)
 			continue;
 		del_gendisk(pf->disk);
 		blk_cleanup_queue(pf->disk->queue);
+		blk_mq_free_tag_set(&pf->tag_set);
 		put_disk(pf->disk);
 		pi_release(pf->pi);
 	}

drivers/block/pktcdvd.c

@@ -2645,7 +2645,7 @@ static int pkt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
 		 */
 		if (pd->refcnt == 1)
 			pkt_lock_door(pd, 0);
-		/* fallthru */
+		/* fall through */
 	/*
 	 * forward selected CDROM ioctls to CD-ROM, for UDF
 	 */

drivers/block/ps3disk.c

@@ -19,7 +19,7 @@
  */
 
 #include <linux/ata.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 
@@ -42,6 +42,7 @@
 struct ps3disk_private {
 	spinlock_t lock;		/* Request queue spinlock */
 	struct request_queue *queue;
+	struct blk_mq_tag_set tag_set;
 	struct gendisk *gendisk;
 	unsigned int blocking_factor;
 	struct request *req;
@@ -118,8 +119,8 @@ static void ps3disk_scatter_gather(struct ps3_storage_device *dev,
 	}
 }
 
-static int ps3disk_submit_request_sg(struct ps3_storage_device *dev,
-				     struct request *req)
+static blk_status_t ps3disk_submit_request_sg(struct ps3_storage_device *dev,
+					      struct request *req)
 {
 	struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
 	int write = rq_data_dir(req), res;
@@ -158,16 +159,15 @@ static int ps3disk_submit_request_sg(struct ps3_storage_device *dev,
 	if (res) {
 		dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
 			__LINE__, op, res);
-		__blk_end_request_all(req, BLK_STS_IOERR);
-		return 0;
+		return BLK_STS_IOERR;
 	}
 
 	priv->req = req;
-	return 1;
+	return BLK_STS_OK;
 }
 
-static int ps3disk_submit_flush_request(struct ps3_storage_device *dev,
-					struct request *req)
+static blk_status_t ps3disk_submit_flush_request(struct ps3_storage_device *dev,
+						 struct request *req)
 {
 	struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
 	u64 res;
@@ -180,50 +180,45 @@ static int ps3disk_submit_flush_request(struct ps3_storage_device *dev,
 	if (res) {
 		dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
 			__func__, __LINE__, res);
-		__blk_end_request_all(req, BLK_STS_IOERR);
-		return 0;
+		return BLK_STS_IOERR;
 	}
 
 	priv->req = req;
-	return 1;
+	return BLK_STS_OK;
 }
 
-static void ps3disk_do_request(struct ps3_storage_device *dev,
-			       struct request_queue *q)
+static blk_status_t ps3disk_do_request(struct ps3_storage_device *dev,
+				       struct request *req)
 {
-	struct request *req;
-
 	dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
 
-	while ((req = blk_fetch_request(q))) {
-		switch (req_op(req)) {
-		case REQ_OP_FLUSH:
-			if (ps3disk_submit_flush_request(dev, req))
-				return;
-			break;
-		case REQ_OP_READ:
-		case REQ_OP_WRITE:
-			if (ps3disk_submit_request_sg(dev, req))
-				return;
-			break;
-		default:
-			blk_dump_rq_flags(req, DEVICE_NAME " bad request");
-			__blk_end_request_all(req, BLK_STS_IOERR);
-		}
+	switch (req_op(req)) {
+	case REQ_OP_FLUSH:
+		return ps3disk_submit_flush_request(dev, req);
+	case REQ_OP_READ:
+	case REQ_OP_WRITE:
+		return ps3disk_submit_request_sg(dev, req);
+	default:
+		blk_dump_rq_flags(req, DEVICE_NAME " bad request");
+		return BLK_STS_IOERR;
 	}
 }
 
-static void ps3disk_request(struct request_queue *q)
+static blk_status_t ps3disk_queue_rq(struct blk_mq_hw_ctx *hctx,
+				     const struct blk_mq_queue_data *bd)
 {
+	struct request_queue *q = hctx->queue;
 	struct ps3_storage_device *dev = q->queuedata;
 	struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
+	blk_status_t ret;
 
-	if (priv->req) {
-		dev_dbg(&dev->sbd.core, "%s:%u busy\n", __func__, __LINE__);
-		return;
-	}
+	blk_mq_start_request(bd->rq);
+
+	spin_lock_irq(&priv->lock);
+	ret = ps3disk_do_request(dev, bd->rq);
+	spin_unlock_irq(&priv->lock);
 
-	ps3disk_do_request(dev, q);
+	return ret;
 }
 
 static irqreturn_t ps3disk_interrupt(int irq, void *data)
@@ -280,11 +275,11 @@ static irqreturn_t ps3disk_interrupt(int irq, void *data)
 	}
 
 	spin_lock(&priv->lock);
-	__blk_end_request_all(req, error);
 	priv->req = NULL;
-	ps3disk_do_request(dev, priv->queue);
+	blk_mq_end_request(req, error);
 	spin_unlock(&priv->lock);
 
+	blk_mq_run_hw_queues(priv->queue, true);
 	return IRQ_HANDLED;
 }
 
@@ -404,6 +399,10 @@ static unsigned long ps3disk_mask;
 
 static DEFINE_MUTEX(ps3disk_mask_mutex);
 
+static const struct blk_mq_ops ps3disk_mq_ops = {
+	.queue_rq	= ps3disk_queue_rq,
+};
+
 static int ps3disk_probe(struct ps3_system_bus_device *_dev)
 {
 	struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
@@ -454,11 +453,12 @@ static int ps3disk_probe(struct ps3_system_bus_device *_dev)
 
 	ps3disk_identify(dev);
 
-	queue = blk_init_queue(ps3disk_request, &priv->lock);
-	if (!queue) {
-		dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
+	queue = blk_mq_init_sq_queue(&priv->tag_set, &ps3disk_mq_ops, 1,
+					BLK_MQ_F_SHOULD_MERGE);
+	if (IS_ERR(queue)) {
+		dev_err(&dev->sbd.core, "%s:%u: blk_mq_init_queue failed\n",
 			__func__, __LINE__);
-		error = -ENOMEM;
+		error = PTR_ERR(queue);
 		goto fail_teardown;
 	}
 
@@ -500,11 +500,12 @@ static int ps3disk_probe(struct ps3_system_bus_device *_dev)
 		 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
 		 get_capacity(gendisk) >> 11);
 
-	device_add_disk(&dev->sbd.core, gendisk);
+	device_add_disk(&dev->sbd.core, gendisk, NULL);
 	return 0;
 
 fail_cleanup_queue:
 	blk_cleanup_queue(queue);
+	blk_mq_free_tag_set(&priv->tag_set);
 fail_teardown:
 	ps3stor_teardown(dev);
 fail_free_bounce:
@@ -530,6 +531,7 @@ static int ps3disk_remove(struct ps3_system_bus_device *_dev)
 	mutex_unlock(&ps3disk_mask_mutex);
 	del_gendisk(priv->gendisk);
 	blk_cleanup_queue(priv->queue);
+	blk_mq_free_tag_set(&priv->tag_set);
 	put_disk(priv->gendisk);
 	dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
 	ps3disk_sync_cache(dev);

drivers/block/ps3vram.c

@@ -769,7 +769,7 @@ static int ps3vram_probe(struct ps3_system_bus_device *dev)
 	dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
 		 gendisk->disk_name, get_capacity(gendisk) >> 11);
 
-	device_add_disk(&dev->core, gendisk);
+	device_add_disk(&dev->core, gendisk, NULL);
 	return 0;
 
 fail_cleanup_queue:

drivers/block/rsxx/core.c

@@ -782,7 +782,7 @@ static int rsxx_pci_probe(struct pci_dev *dev,
 	pci_set_master(dev);
 	pci_set_dma_max_seg_size(dev, RSXX_HW_BLK_SIZE);
 
-	st = pci_set_dma_mask(dev, DMA_BIT_MASK(64));
+	st = dma_set_mask(&dev->dev, DMA_BIT_MASK(64));
 	if (st) {
 		dev_err(CARD_TO_DEV(card),
 			"No usable DMA configuration,aborting\n");

drivers/block/rsxx/cregs.c

@@ -276,7 +276,7 @@ static void creg_cmd_done(struct work_struct *work)
 		st = -EIO;
 	}
 
-	if ((cmd->op == CREG_OP_READ)) {
+	if (cmd->op == CREG_OP_READ) {
 		unsigned int cnt8 = ioread32(card->regmap + CREG_CNT);
 
 		/* Paranoid Sanity Checks */

drivers/block/rsxx/dev.c

@@ -226,7 +226,7 @@ int rsxx_attach_dev(struct rsxx_cardinfo *card)
 			set_capacity(card->gendisk, card->size8 >> 9);
 		else
 			set_capacity(card->gendisk, 0);
-		device_add_disk(CARD_TO_DEV(card), card->gendisk);
+		device_add_disk(CARD_TO_DEV(card), card->gendisk, NULL);
 		card->bdev_attached = 1;
 	}
 

drivers/block/rsxx/dma.c

@@ -224,12 +224,12 @@ static void dma_intr_coal_auto_tune(struct rsxx_cardinfo *card)
 static void rsxx_free_dma(struct rsxx_dma_ctrl *ctrl, struct rsxx_dma *dma)
 {
 	if (dma->cmd != HW_CMD_BLK_DISCARD) {
-		if (!pci_dma_mapping_error(ctrl->card->dev, dma->dma_addr)) {
-			pci_unmap_page(ctrl->card->dev, dma->dma_addr,
+		if (!dma_mapping_error(&ctrl->card->dev->dev, dma->dma_addr)) {
+			dma_unmap_page(&ctrl->card->dev->dev, dma->dma_addr,
 				       get_dma_size(dma),
 				       dma->cmd == HW_CMD_BLK_WRITE ?
-						   PCI_DMA_TODEVICE :
-						   PCI_DMA_FROMDEVICE);
+						   DMA_TO_DEVICE :
+						   DMA_FROM_DEVICE);
 		}
 	}
 
@@ -438,23 +438,23 @@ static void rsxx_issue_dmas(struct rsxx_dma_ctrl *ctrl)
 
 		if (dma->cmd != HW_CMD_BLK_DISCARD) {
 			if (dma->cmd == HW_CMD_BLK_WRITE)
-				dir = PCI_DMA_TODEVICE;
+				dir = DMA_TO_DEVICE;
 			else
-				dir = PCI_DMA_FROMDEVICE;
+				dir = DMA_FROM_DEVICE;
 
 			/*
-			 * The function pci_map_page is placed here because we
+			 * The function dma_map_page is placed here because we
 			 * can only, by design, issue up to 255 commands to the
 			 * hardware at one time per DMA channel. So the maximum
 			 * amount of mapped memory would be 255 * 4 channels *
 			 * 4096 Bytes which is less than 2GB, the limit of a x8
-			 * Non-HWWD PCIe slot. This way the pci_map_page
+			 * Non-HWWD PCIe slot. This way the dma_map_page
 			 * function should never fail because of a lack of
 			 * mappable memory.
 			 */
-			dma->dma_addr = pci_map_page(ctrl->card->dev, dma->page,
+			dma->dma_addr = dma_map_page(&ctrl->card->dev->dev, dma->page,
 					dma->pg_off, dma->sub_page.cnt << 9, dir);
-			if (pci_dma_mapping_error(ctrl->card->dev, dma->dma_addr)) {
+			if (dma_mapping_error(&ctrl->card->dev->dev, dma->dma_addr)) {
 				push_tracker(ctrl->trackers, tag);
 				rsxx_complete_dma(ctrl, dma, DMA_CANCELLED);
 				continue;
@@ -776,10 +776,10 @@ bvec_err:
 /*----------------- DMA Engine Initialization & Setup -------------------*/
 int rsxx_hw_buffers_init(struct pci_dev *dev, struct rsxx_dma_ctrl *ctrl)
 {
-	ctrl->status.buf = pci_alloc_consistent(dev, STATUS_BUFFER_SIZE8,
-				&ctrl->status.dma_addr);
-	ctrl->cmd.buf = pci_alloc_consistent(dev, COMMAND_BUFFER_SIZE8,
-				&ctrl->cmd.dma_addr);
+	ctrl->status.buf = dma_alloc_coherent(&dev->dev, STATUS_BUFFER_SIZE8,
+				&ctrl->status.dma_addr, GFP_KERNEL);
+	ctrl->cmd.buf = dma_alloc_coherent(&dev->dev, COMMAND_BUFFER_SIZE8,
+				&ctrl->cmd.dma_addr, GFP_KERNEL);
 	if (ctrl->status.buf == NULL || ctrl->cmd.buf == NULL)
 		return -ENOMEM;
 
@@ -962,12 +962,12 @@ failed_dma_setup:
 			vfree(ctrl->trackers);
 
 		if (ctrl->status.buf)
-			pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8,
-					    ctrl->status.buf,
-					    ctrl->status.dma_addr);
+			dma_free_coherent(&card->dev->dev, STATUS_BUFFER_SIZE8,
+					  ctrl->status.buf,
+					  ctrl->status.dma_addr);
 		if (ctrl->cmd.buf)
-			pci_free_consistent(card->dev, COMMAND_BUFFER_SIZE8,
-					    ctrl->cmd.buf, ctrl->cmd.dma_addr);
+			dma_free_coherent(&card->dev->dev, COMMAND_BUFFER_SIZE8,
+					  ctrl->cmd.buf, ctrl->cmd.dma_addr);
 	}
 
 	return st;
@@ -1023,10 +1023,10 @@ void rsxx_dma_destroy(struct rsxx_cardinfo *card)
 
 		vfree(ctrl->trackers);
 
-		pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8,
-				    ctrl->status.buf, ctrl->status.dma_addr);
-		pci_free_consistent(card->dev, COMMAND_BUFFER_SIZE8,
-				    ctrl->cmd.buf, ctrl->cmd.dma_addr);
+		dma_free_coherent(&card->dev->dev, STATUS_BUFFER_SIZE8,
+				  ctrl->status.buf, ctrl->status.dma_addr);
+		dma_free_coherent(&card->dev->dev, COMMAND_BUFFER_SIZE8,
+				  ctrl->cmd.buf, ctrl->cmd.dma_addr);
 	}
 }
 
@@ -1059,11 +1059,11 @@ int rsxx_eeh_save_issued_dmas(struct rsxx_cardinfo *card)
 				card->ctrl[i].stats.reads_issued--;
 
 			if (dma->cmd != HW_CMD_BLK_DISCARD) {
-				pci_unmap_page(card->dev, dma->dma_addr,
+				dma_unmap_page(&card->dev->dev, dma->dma_addr,
 					       get_dma_size(dma),
 					       dma->cmd == HW_CMD_BLK_WRITE ?
-					       PCI_DMA_TODEVICE :
-					       PCI_DMA_FROMDEVICE);
+					       DMA_TO_DEVICE :
+					       DMA_FROM_DEVICE);
 			}
 
 			list_add_tail(&dma->list, &issued_dmas[i]);

drivers/block/skd_main.c

@@ -632,7 +632,7 @@ static bool skd_preop_sg_list(struct skd_device *skdev,
 	 * Map scatterlist to PCI bus addresses.
 	 * Note PCI might change the number of entries.
 	 */
-	n_sg = pci_map_sg(skdev->pdev, sgl, n_sg, skreq->data_dir);
+	n_sg = dma_map_sg(&skdev->pdev->dev, sgl, n_sg, skreq->data_dir);
 	if (n_sg <= 0)
 		return false;
 
@@ -682,7 +682,8 @@ static void skd_postop_sg_list(struct skd_device *skdev,
 	skreq->sksg_list[skreq->n_sg - 1].next_desc_ptr =
 		skreq->sksg_dma_address +
 		((skreq->n_sg) * sizeof(struct fit_sg_descriptor));
-	pci_unmap_sg(skdev->pdev, &skreq->sg[0], skreq->n_sg, skreq->data_dir);
+	dma_unmap_sg(&skdev->pdev->dev, &skreq->sg[0], skreq->n_sg,
+		     skreq->data_dir);
 }
 
 /*
@@ -1416,7 +1417,7 @@ static void skd_resolve_req_exception(struct skd_device *skdev,
 
 	case SKD_CHECK_STATUS_BUSY_IMMINENT:
 		skd_log_skreq(skdev, skreq, "retry(busy)");
-		blk_requeue_request(skdev->queue, req);
+		blk_mq_requeue_request(req, true);
 		dev_info(&skdev->pdev->dev, "drive BUSY imminent\n");
 		skdev->state = SKD_DRVR_STATE_BUSY_IMMINENT;
 		skdev->timer_countdown = SKD_TIMER_MINUTES(20);
@@ -1426,7 +1427,7 @@ static void skd_resolve_req_exception(struct skd_device *skdev,
 	case SKD_CHECK_STATUS_REQUEUE_REQUEST:
 		if ((unsigned long) ++req->special < SKD_MAX_RETRIES) {
 			skd_log_skreq(skdev, skreq, "retry");
-			blk_requeue_request(skdev->queue, req);
+			blk_mq_requeue_request(req, true);
 			break;
 		}
 		/* fall through */
@@ -2632,8 +2633,8 @@ static int skd_cons_skcomp(struct skd_device *skdev)
 		"comp pci_alloc, total bytes %zd entries %d\n",
 		SKD_SKCOMP_SIZE, SKD_N_COMPLETION_ENTRY);
 
-	skcomp = pci_zalloc_consistent(skdev->pdev, SKD_SKCOMP_SIZE,
-				       &skdev->cq_dma_address);
+	skcomp = dma_zalloc_coherent(&skdev->pdev->dev, SKD_SKCOMP_SIZE,
+				     &skdev->cq_dma_address, GFP_KERNEL);
 
 	if (skcomp == NULL) {
 		rc = -ENOMEM;
@@ -2674,10 +2675,10 @@ static int skd_cons_skmsg(struct skd_device *skdev)
 
 		skmsg->id = i + SKD_ID_FIT_MSG;
 
-		skmsg->msg_buf = pci_alloc_consistent(skdev->pdev,
-						      SKD_N_FITMSG_BYTES,
-						      &skmsg->mb_dma_address);
-
+		skmsg->msg_buf = dma_alloc_coherent(&skdev->pdev->dev,
+						    SKD_N_FITMSG_BYTES,
+						    &skmsg->mb_dma_address,
+						    GFP_KERNEL);
 		if (skmsg->msg_buf == NULL) {
 			rc = -ENOMEM;
 			goto err_out;
@@ -2971,8 +2972,8 @@ err_out:
 static void skd_free_skcomp(struct skd_device *skdev)
 {
 	if (skdev->skcomp_table)
-		pci_free_consistent(skdev->pdev, SKD_SKCOMP_SIZE,
-				    skdev->skcomp_table, skdev->cq_dma_address);
+		dma_free_coherent(&skdev->pdev->dev, SKD_SKCOMP_SIZE,
+				  skdev->skcomp_table, skdev->cq_dma_address);
 
 	skdev->skcomp_table = NULL;
 	skdev->cq_dma_address = 0;
@@ -2991,8 +2992,8 @@ static void skd_free_skmsg(struct skd_device *skdev)
 		skmsg = &skdev->skmsg_table[i];
 
 		if (skmsg->msg_buf != NULL) {
-			pci_free_consistent(skdev->pdev, SKD_N_FITMSG_BYTES,
-					    skmsg->msg_buf,
+			dma_free_coherent(&skdev->pdev->dev, SKD_N_FITMSG_BYTES,
+					  skmsg->msg_buf,
 					    skmsg->mb_dma_address);
 		}
 		skmsg->msg_buf = NULL;
@@ -3104,7 +3105,7 @@ static int skd_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 static int skd_bdev_attach(struct device *parent, struct skd_device *skdev)
 {
 	dev_dbg(&skdev->pdev->dev, "add_disk\n");
-	device_add_disk(parent, skdev->disk);
+	device_add_disk(parent, skdev->disk, NULL);
 	return 0;
 }
 
@@ -3172,18 +3173,12 @@ static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	rc = pci_request_regions(pdev, DRV_NAME);
 	if (rc)
 		goto err_out;
-	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
-	if (!rc) {
-		if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
-			dev_err(&pdev->dev, "consistent DMA mask error %d\n",
-				rc);
-		}
-	} else {
-		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
-		if (rc) {
-			dev_err(&pdev->dev, "DMA mask error %d\n", rc);
-			goto err_out_regions;
-		}
+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (rc)
+		dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (rc) {
+		dev_err(&pdev->dev, "DMA mask error %d\n", rc);
+		goto err_out_regions;
 	}
 
 	if (!skd_major) {
@@ -3367,20 +3362,12 @@ static int skd_pci_resume(struct pci_dev *pdev)
 	rc = pci_request_regions(pdev, DRV_NAME);
 	if (rc)
 		goto err_out;
-	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
-	if (!rc) {
-		if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
-
-			dev_err(&pdev->dev, "consistent DMA mask error %d\n",
-				rc);
-		}
-	} else {
-		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
-		if (rc) {
-
-			dev_err(&pdev->dev, "DMA mask error %d\n", rc);
-			goto err_out_regions;
-		}
+	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+	if (rc)
+		dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (rc) {
+		dev_err(&pdev->dev, "DMA mask error %d\n", rc);
+		goto err_out_regions;
 	}
 
 	pci_set_master(pdev);

drivers/block/sunvdc.c

@@ -857,7 +857,7 @@ static int probe_disk(struct vdc_port *port)
 	       port->vdisk_size, (port->vdisk_size >> (20 - 9)),
 	       port->vio.ver.major, port->vio.ver.minor);
 
-	device_add_disk(&port->vio.vdev->dev, g);
+	device_add_disk(&port->vio.vdev->dev, g, NULL);
 
 	return 0;
 }

drivers/block/swim.c

@@ -19,7 +19,7 @@
 #include <linux/module.h>
 #include <linux/fd.h>
 #include <linux/slab.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/mutex.h>
 #include <linux/hdreg.h>
 #include <linux/kernel.h>
@@ -190,6 +190,7 @@ struct floppy_state {
 	int		ref_count;
 
 	struct gendisk *disk;
+	struct blk_mq_tag_set tag_set;
 
 	/* parent controller */
 
@@ -211,7 +212,6 @@ enum head {
 struct swim_priv {
 	struct swim __iomem *base;
 	spinlock_t lock;
-	int fdc_queue;
 	int floppy_count;
 	struct floppy_state unit[FD_MAX_UNIT];
 };
@@ -525,58 +525,36 @@ static blk_status_t floppy_read_sectors(struct floppy_state *fs,
 	return 0;
 }
 
-static struct request *swim_next_request(struct swim_priv *swd)
+static blk_status_t swim_queue_rq(struct blk_mq_hw_ctx *hctx,
+				  const struct blk_mq_queue_data *bd)
 {
-	struct request_queue *q;
-	struct request *rq;
-	int old_pos = swd->fdc_queue;
+	struct floppy_state *fs = hctx->queue->queuedata;
+	struct swim_priv *swd = fs->swd;
+	struct request *req = bd->rq;
+	blk_status_t err;
 
-	do {
-		q = swd->unit[swd->fdc_queue].disk->queue;
-		if (++swd->fdc_queue == swd->floppy_count)
-			swd->fdc_queue = 0;
-		if (q) {
-			rq = blk_fetch_request(q);
-			if (rq)
-				return rq;
-		}
-	} while (swd->fdc_queue != old_pos);
+	if (!spin_trylock_irq(&swd->lock))
+		return BLK_STS_DEV_RESOURCE;
 
-	return NULL;
-}
+	blk_mq_start_request(req);
 
-static void do_fd_request(struct request_queue *q)
-{
-	struct swim_priv *swd = q->queuedata;
-	struct request *req;
-	struct floppy_state *fs;
+	if (!fs->disk_in || rq_data_dir(req) == WRITE) {
+		err = BLK_STS_IOERR;
+		goto out;
+	}
 
-	req = swim_next_request(swd);
-	while (req) {
-		blk_status_t err = BLK_STS_IOERR;
+	do {
+		err = floppy_read_sectors(fs, blk_rq_pos(req),
+					  blk_rq_cur_sectors(req),
+					  bio_data(req->bio));
+	} while (blk_update_request(req, err, blk_rq_cur_bytes(req)));
+	__blk_mq_end_request(req, err);
 
-		fs = req->rq_disk->private_data;
-		if (blk_rq_pos(req) >= fs->total_secs)
-			goto done;
-		if (!fs->disk_in)
-			goto done;
-		if (rq_data_dir(req) == WRITE && fs->write_protected)
-			goto done;
+	err = BLK_STS_OK;
+out:
+	spin_unlock_irq(&swd->lock);
+	return err;
 
-		switch (rq_data_dir(req)) {
-		case WRITE:
-			/* NOT IMPLEMENTED */
-			break;
-		case READ:
-			err = floppy_read_sectors(fs, blk_rq_pos(req),
-						  blk_rq_cur_sectors(req),
-						  bio_data(req->bio));
-			break;
-		}
-	done:
-		if (!__blk_end_request_cur(req, err))
-			req = swim_next_request(swd);
-	}
 }
 
 static struct floppy_struct floppy_type[4] = {
@@ -823,6 +801,10 @@ static int swim_add_floppy(struct swim_priv *swd, enum drive_location location)
 	return 0;
 }
 
+static const struct blk_mq_ops swim_mq_ops = {
+	.queue_rq = swim_queue_rq,
+};
+
 static int swim_floppy_init(struct swim_priv *swd)
 {
 	int err;
@@ -852,20 +834,25 @@ static int swim_floppy_init(struct swim_priv *swd)
 	spin_lock_init(&swd->lock);
 
 	for (drive = 0; drive < swd->floppy_count; drive++) {
+		struct request_queue *q;
+
 		swd->unit[drive].disk = alloc_disk(1);
 		if (swd->unit[drive].disk == NULL) {
 			err = -ENOMEM;
 			goto exit_put_disks;
 		}
-		swd->unit[drive].disk->queue = blk_init_queue(do_fd_request,
-							      &swd->lock);
-		if (!swd->unit[drive].disk->queue) {
-			err = -ENOMEM;
+
+		q = blk_mq_init_sq_queue(&swd->unit[drive].tag_set, &swim_mq_ops,
+						2, BLK_MQ_F_SHOULD_MERGE);
+		if (IS_ERR(q)) {
+			err = PTR_ERR(q);
 			goto exit_put_disks;
 		}
+
+		swd->unit[drive].disk->queue = q;
 		blk_queue_bounce_limit(swd->unit[drive].disk->queue,
 				BLK_BOUNCE_HIGH);
-		swd->unit[drive].disk->queue->queuedata = swd;
+		swd->unit[drive].disk->queue->queuedata = &swd->unit[drive];
 		swd->unit[drive].swd = swd;
 	}
 
@@ -887,8 +874,18 @@ static int swim_floppy_init(struct swim_priv *swd)
 
 exit_put_disks:
 	unregister_blkdev(FLOPPY_MAJOR, "fd");
-	while (drive--)
-		put_disk(swd->unit[drive].disk);
+	do {
+		struct gendisk *disk = swd->unit[drive].disk;
+
+		if (disk) {
+			if (disk->queue) {
+				blk_cleanup_queue(disk->queue);
+				disk->queue = NULL;
+			}
+			blk_mq_free_tag_set(&swd->unit[drive].tag_set);
+			put_disk(disk);
+		}
+	} while (drive--);
 	return err;
 }
 
@@ -961,6 +958,7 @@ static int swim_remove(struct platform_device *dev)
 	for (drive = 0; drive < swd->floppy_count; drive++) {
 		del_gendisk(swd->unit[drive].disk);
 		blk_cleanup_queue(swd->unit[drive].disk->queue);
+		blk_mq_free_tag_set(&swd->unit[drive].tag_set);
 		put_disk(swd->unit[drive].disk);
 	}
 

drivers/block/swim3.c

@@ -25,7 +25,7 @@
 #include <linux/delay.h>
 #include <linux/fd.h>
 #include <linux/ioctl.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/interrupt.h>
 #include <linux/mutex.h>
 #include <linux/module.h>
@@ -206,6 +206,7 @@ struct floppy_state {
 	char	dbdma_cmd_space[5 * sizeof(struct dbdma_cmd)];
 	int	index;
 	struct request *cur_req;
+	struct blk_mq_tag_set tag_set;
 };
 
 #define swim3_err(fmt, arg...)	dev_err(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
@@ -260,16 +261,15 @@ static int floppy_revalidate(struct gendisk *disk);
 static bool swim3_end_request(struct floppy_state *fs, blk_status_t err, unsigned int nr_bytes)
 {
 	struct request *req = fs->cur_req;
-	int rc;
 
 	swim3_dbg("  end request, err=%d nr_bytes=%d, cur_req=%p\n",
 		  err, nr_bytes, req);
 
 	if (err)
 		nr_bytes = blk_rq_cur_bytes(req);
-	rc = __blk_end_request(req, err, nr_bytes);
-	if (rc)
+	if (blk_update_request(req, err, nr_bytes))
 		return true;
+	__blk_mq_end_request(req, err);
 	fs->cur_req = NULL;
 	return false;
 }
@@ -309,86 +309,58 @@ static int swim3_readbit(struct floppy_state *fs, int bit)
 	return (stat & DATA) == 0;
 }
 
-static void start_request(struct floppy_state *fs)
+static blk_status_t swim3_queue_rq(struct blk_mq_hw_ctx *hctx,
+				   const struct blk_mq_queue_data *bd)
 {
-	struct request *req;
+	struct floppy_state *fs = hctx->queue->queuedata;
+	struct request *req = bd->rq;
 	unsigned long x;
 
-	swim3_dbg("start request, initial state=%d\n", fs->state);
-
-	if (fs->state == idle && fs->wanted) {
-		fs->state = available;
-		wake_up(&fs->wait);
-		return;
+	spin_lock_irq(&swim3_lock);
+	if (fs->cur_req || fs->state != idle) {
+		spin_unlock_irq(&swim3_lock);
+		return BLK_STS_DEV_RESOURCE;
 	}
-	while (fs->state == idle) {
-		swim3_dbg("start request, idle loop, cur_req=%p\n", fs->cur_req);
-		if (!fs->cur_req) {
-			fs->cur_req = blk_fetch_request(disks[fs->index]->queue);
-			swim3_dbg("  fetched request %p\n", fs->cur_req);
-			if (!fs->cur_req)
-				break;
-		}
-		req = fs->cur_req;
-
-		if (fs->mdev->media_bay &&
-		    check_media_bay(fs->mdev->media_bay) != MB_FD) {
-			swim3_dbg("%s", "  media bay absent, dropping req\n");
-			swim3_end_request(fs, BLK_STS_IOERR, 0);
-			continue;
-		}
-
-#if 0 /* This is really too verbose */
-		swim3_dbg("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%u buf=%p\n",
-			  req->rq_disk->disk_name, req->cmd,
-			  (long)blk_rq_pos(req), blk_rq_sectors(req),
-			  bio_data(req->bio));
-		swim3_dbg("           current_nr_sectors=%u\n",
-			  blk_rq_cur_sectors(req));
-#endif
-
-		if (blk_rq_pos(req) >= fs->total_secs) {
-			swim3_dbg("  pos out of bounds (%ld, max is %ld)\n",
-				  (long)blk_rq_pos(req), (long)fs->total_secs);
-			swim3_end_request(fs, BLK_STS_IOERR, 0);
-			continue;
-		}
-		if (fs->ejected) {
-			swim3_dbg("%s", "  disk ejected\n");
+	blk_mq_start_request(req);
+	fs->cur_req = req;
+	if (fs->mdev->media_bay &&
+	    check_media_bay(fs->mdev->media_bay) != MB_FD) {
+		swim3_dbg("%s", "  media bay absent, dropping req\n");
+		swim3_end_request(fs, BLK_STS_IOERR, 0);
+		goto out;
+	}
+	if (fs->ejected) {
+		swim3_dbg("%s", "  disk ejected\n");
+		swim3_end_request(fs, BLK_STS_IOERR, 0);
+		goto out;
+	}
+	if (rq_data_dir(req) == WRITE) {
+		if (fs->write_prot < 0)
+			fs->write_prot = swim3_readbit(fs, WRITE_PROT);
+		if (fs->write_prot) {
+			swim3_dbg("%s", "  try to write, disk write protected\n");
 			swim3_end_request(fs, BLK_STS_IOERR, 0);
-			continue;
+			goto out;
 		}
-
-		if (rq_data_dir(req) == WRITE) {
-			if (fs->write_prot < 0)
-				fs->write_prot = swim3_readbit(fs, WRITE_PROT);
-			if (fs->write_prot) {
-				swim3_dbg("%s", "  try to write, disk write protected\n");
-				swim3_end_request(fs, BLK_STS_IOERR, 0);
-				continue;
-			}
-		}
-
-		/* Do not remove the cast. blk_rq_pos(req) is now a
-		 * sector_t and can be 64 bits, but it will never go
-		 * past 32 bits for this driver anyway, so we can
-		 * safely cast it down and not have to do a 64/32
-		 * division
-		 */
-		fs->req_cyl = ((long)blk_rq_pos(req)) / fs->secpercyl;
-		x = ((long)blk_rq_pos(req)) % fs->secpercyl;
-		fs->head = x / fs->secpertrack;
-		fs->req_sector = x % fs->secpertrack + 1;
-		fs->state = do_transfer;
-		fs->retries = 0;
-
-		act(fs);
 	}
-}
 
-static void do_fd_request(struct request_queue * q)
-{
-	start_request(q->queuedata);
+	/*
+	 * Do not remove the cast. blk_rq_pos(req) is now a sector_t and can be
+	 * 64 bits, but it will never go past 32 bits for this driver anyway, so
+	 * we can safely cast it down and not have to do a 64/32 division
+	 */
+	fs->req_cyl = ((long)blk_rq_pos(req)) / fs->secpercyl;
+	x = ((long)blk_rq_pos(req)) % fs->secpercyl;
+	fs->head = x / fs->secpertrack;
+	fs->req_sector = x % fs->secpertrack + 1;
+	fs->state = do_transfer;
+	fs->retries = 0;
+
+	act(fs);
+
+out:
+	spin_unlock_irq(&swim3_lock);
+	return BLK_STS_OK;
 }
 
 static void set_timeout(struct floppy_state *fs, int nticks,
@@ -585,7 +557,6 @@ static void scan_timeout(struct timer_list *t)
 	if (fs->retries > 5) {
 		swim3_end_request(fs, BLK_STS_IOERR, 0);
 		fs->state = idle;
-		start_request(fs);
 	} else {
 		fs->state = jogging;
 		act(fs);
@@ -609,7 +580,6 @@ static void seek_timeout(struct timer_list *t)
 	swim3_err("%s", "Seek timeout\n");
 	swim3_end_request(fs, BLK_STS_IOERR, 0);
 	fs->state = idle;
-	start_request(fs);
 	spin_unlock_irqrestore(&swim3_lock, flags);
 }
 
@@ -638,7 +608,6 @@ static void settle_timeout(struct timer_list *t)
 	swim3_err("%s", "Seek settle timeout\n");
 	swim3_end_request(fs, BLK_STS_IOERR, 0);
 	fs->state = idle;
-	start_request(fs);
  unlock:
 	spin_unlock_irqrestore(&swim3_lock, flags);
 }
@@ -667,7 +636,6 @@ static void xfer_timeout(struct timer_list *t)
 	       (long)blk_rq_pos(fs->cur_req));
 	swim3_end_request(fs, BLK_STS_IOERR, 0);
 	fs->state = idle;
-	start_request(fs);
 	spin_unlock_irqrestore(&swim3_lock, flags);
 }
 
@@ -704,7 +672,6 @@ static irqreturn_t swim3_interrupt(int irq, void *dev_id)
 				if (fs->retries > 5) {
 					swim3_end_request(fs, BLK_STS_IOERR, 0);
 					fs->state = idle;
-					start_request(fs);
 				} else {
 					fs->state = jogging;
 					act(fs);
@@ -796,7 +763,6 @@ static irqreturn_t swim3_interrupt(int irq, void *dev_id)
 					  fs->state, rq_data_dir(req), intr, err);
 				swim3_end_request(fs, BLK_STS_IOERR, 0);
 				fs->state = idle;
-				start_request(fs);
 				break;
 			}
 			fs->retries = 0;
@@ -813,8 +779,6 @@ static irqreturn_t swim3_interrupt(int irq, void *dev_id)
 			} else
 				fs->state = idle;
 		}
-		if (fs->state == idle)
-			start_request(fs);
 		break;
 	default:
 		swim3_err("Don't know what to do in state %d\n", fs->state);
@@ -862,14 +826,19 @@ static int grab_drive(struct floppy_state *fs, enum swim_state state,
 
 static void release_drive(struct floppy_state *fs)
 {
+	struct request_queue *q = disks[fs->index]->queue;
 	unsigned long flags;
 
 	swim3_dbg("%s", "-> release drive\n");
 
 	spin_lock_irqsave(&swim3_lock, flags);
 	fs->state = idle;
-	start_request(fs);
 	spin_unlock_irqrestore(&swim3_lock, flags);
+
+	blk_mq_freeze_queue(q);
+	blk_mq_quiesce_queue(q);
+	blk_mq_unquiesce_queue(q);
+	blk_mq_unfreeze_queue(q);
 }
 
 static int fd_eject(struct floppy_state *fs)
@@ -1089,6 +1058,10 @@ static const struct block_device_operations floppy_fops = {
 	.revalidate_disk= floppy_revalidate,
 };
 
+static const struct blk_mq_ops swim3_mq_ops = {
+	.queue_rq = swim3_queue_rq,
+};
+
 static void swim3_mb_event(struct macio_dev* mdev, int mb_state)
 {
 	struct floppy_state *fs = macio_get_drvdata(mdev);
@@ -1202,47 +1175,63 @@ static int swim3_add_device(struct macio_dev *mdev, int index)
 static int swim3_attach(struct macio_dev *mdev,
 			const struct of_device_id *match)
 {
+	struct floppy_state *fs;
 	struct gendisk *disk;
-	int index, rc;
+	int rc;
 
-	index = floppy_count++;
-	if (index >= MAX_FLOPPIES)
+	if (floppy_count >= MAX_FLOPPIES)
 		return -ENXIO;
 
-	/* Add the drive */
-	rc = swim3_add_device(mdev, index);
-	if (rc)
-		return rc;
-	/* Now register that disk. Same comment about failure handling */
-	disk = disks[index] = alloc_disk(1);
-	if (disk == NULL)
-		return -ENOMEM;
-	disk->queue = blk_init_queue(do_fd_request, &swim3_lock);
-	if (disk->queue == NULL) {
-		put_disk(disk);
-		return -ENOMEM;
+	if (floppy_count == 0) {
+		rc = register_blkdev(FLOPPY_MAJOR, "fd");
+		if (rc)
+			return rc;
 	}
-	blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
-	disk->queue->queuedata = &floppy_states[index];
 
-	if (index == 0) {
-		/* If we failed, there isn't much we can do as the driver is still
-		 * too dumb to remove the device, just bail out
-		 */
-		if (register_blkdev(FLOPPY_MAJOR, "fd"))
-			return 0;
+	fs = &floppy_states[floppy_count];
+
+	disk = alloc_disk(1);
+	if (disk == NULL) {
+		rc = -ENOMEM;
+		goto out_unregister;
+	}
+
+	disk->queue = blk_mq_init_sq_queue(&fs->tag_set, &swim3_mq_ops, 2,
+						BLK_MQ_F_SHOULD_MERGE);
+	if (IS_ERR(disk->queue)) {
+		rc = PTR_ERR(disk->queue);
+		disk->queue = NULL;
+		goto out_put_disk;
 	}
+	blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
+	disk->queue->queuedata = fs;
+
+	rc = swim3_add_device(mdev, floppy_count);
+	if (rc)
+		goto out_cleanup_queue;
 
 	disk->major = FLOPPY_MAJOR;
-	disk->first_minor = index;
+	disk->first_minor = floppy_count;
 	disk->fops = &floppy_fops;
-	disk->private_data = &floppy_states[index];
+	disk->private_data = fs;
 	disk->flags |= GENHD_FL_REMOVABLE;
-	sprintf(disk->disk_name, "fd%d", index);
+	sprintf(disk->disk_name, "fd%d", floppy_count);
 	set_capacity(disk, 2880);
 	add_disk(disk);
 
+	disks[floppy_count++] = disk;
 	return 0;
+
+out_cleanup_queue:
+	blk_cleanup_queue(disk->queue);
+	disk->queue = NULL;
+	blk_mq_free_tag_set(&fs->tag_set);
+out_put_disk:
+	put_disk(disk);
+out_unregister:
+	if (floppy_count == 0)
+		unregister_blkdev(FLOPPY_MAJOR, "fd");
+	return rc;
 }
 
 static const struct of_device_id swim3_match[] =

drivers/block/sx8.c

@@ -16,7 +16,7 @@
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/spinlock.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/sched.h>
 #include <linux/interrupt.h>
 #include <linux/compiler.h>
@@ -197,7 +197,6 @@ enum {
 	FL_NON_RAID		= FW_VER_NON_RAID,
 	FL_4PORT		= FW_VER_4PORT,
 	FL_FW_VER_MASK		= (FW_VER_NON_RAID | FW_VER_4PORT),
-	FL_DAC			= (1 << 16),
 	FL_DYN_MAJOR		= (1 << 17),
 };
 
@@ -244,6 +243,7 @@ struct carm_port {
 	unsigned int			port_no;
 	struct gendisk			*disk;
 	struct carm_host		*host;
+	struct blk_mq_tag_set		tag_set;
 
 	/* attached device characteristics */
 	u64				capacity;
@@ -279,6 +279,7 @@ struct carm_host {
 	unsigned int			state;
 	u32				fw_ver;
 
+	struct blk_mq_tag_set		tag_set;
 	struct request_queue		*oob_q;
 	unsigned int			n_oob;
 
@@ -750,7 +751,7 @@ static inline void carm_end_request_queued(struct carm_host *host,
 	struct request *req = crq->rq;
 	int rc;
 
-	__blk_end_request_all(req, error);
+	blk_mq_end_request(req, error);
 
 	rc = carm_put_request(host, crq);
 	assert(rc == 0);
@@ -760,7 +761,7 @@ static inline void carm_push_q (struct carm_host *host, struct request_queue *q)
 {
 	unsigned int idx = host->wait_q_prod % CARM_MAX_WAIT_Q;
 
-	blk_stop_queue(q);
+	blk_mq_stop_hw_queues(q);
 	VPRINTK("STOPPED QUEUE %p\n", q);
 
 	host->wait_q[idx] = q;
@@ -785,7 +786,7 @@ static inline void carm_round_robin(struct carm_host *host)
 {
 	struct request_queue *q = carm_pop_q(host);
 	if (q) {
-		blk_start_queue(q);
+		blk_mq_start_hw_queues(q);
 		VPRINTK("STARTED QUEUE %p\n", q);
 	}
 }
@@ -802,82 +803,86 @@ static inline void carm_end_rq(struct carm_host *host, struct carm_request *crq,
 	}
 }
 
-static void carm_oob_rq_fn(struct request_queue *q)
+static blk_status_t carm_oob_queue_rq(struct blk_mq_hw_ctx *hctx,
+				      const struct blk_mq_queue_data *bd)
 {
+	struct request_queue *q = hctx->queue;
 	struct carm_host *host = q->queuedata;
 	struct carm_request *crq;
-	struct request *rq;
 	int rc;
 
-	while (1) {
-		DPRINTK("get req\n");
-		rq = blk_fetch_request(q);
-		if (!rq)
-			break;
+	blk_mq_start_request(bd->rq);
 
-		crq = rq->special;
-		assert(crq != NULL);
-		assert(crq->rq == rq);
+	spin_lock_irq(&host->lock);
 
-		crq->n_elem = 0;
+	crq = bd->rq->special;
+	assert(crq != NULL);
+	assert(crq->rq == bd->rq);
 
-		DPRINTK("send req\n");
-		rc = carm_send_msg(host, crq);
-		if (rc) {
-			blk_requeue_request(q, rq);
-			carm_push_q(host, q);
-			return;		/* call us again later, eventually */
-		}
+	crq->n_elem = 0;
+
+	DPRINTK("send req\n");
+	rc = carm_send_msg(host, crq);
+	if (rc) {
+		carm_push_q(host, q);
+		spin_unlock_irq(&host->lock);
+		return BLK_STS_DEV_RESOURCE;
 	}
+
+	spin_unlock_irq(&host->lock);
+	return BLK_STS_OK;
 }
 
-static void carm_rq_fn(struct request_queue *q)
+static blk_status_t carm_queue_rq(struct blk_mq_hw_ctx *hctx,
+				  const struct blk_mq_queue_data *bd)
 {
+	struct request_queue *q = hctx->queue;
 	struct carm_port *port = q->queuedata;
 	struct carm_host *host = port->host;
 	struct carm_msg_rw *msg;
 	struct carm_request *crq;
-	struct request *rq;
+	struct request *rq = bd->rq;
 	struct scatterlist *sg;
 	int writing = 0, pci_dir, i, n_elem, rc;
 	u32 tmp;
 	unsigned int msg_size;
 
-queue_one_request:
-	VPRINTK("get req\n");
-	rq = blk_peek_request(q);
-	if (!rq)
-		return;
+	blk_mq_start_request(rq);
+
+	spin_lock_irq(&host->lock);
 
 	crq = carm_get_request(host);
 	if (!crq) {
 		carm_push_q(host, q);
-		return;		/* call us again later, eventually */
+		spin_unlock_irq(&host->lock);
+		return BLK_STS_DEV_RESOURCE;
 	}
 	crq->rq = rq;
 
-	blk_start_request(rq);
-
 	if (rq_data_dir(rq) == WRITE) {
 		writing = 1;
-		pci_dir = PCI_DMA_TODEVICE;
+		pci_dir = DMA_TO_DEVICE;
 	} else {
-		pci_dir = PCI_DMA_FROMDEVICE;
+		pci_dir = DMA_FROM_DEVICE;
 	}
 
 	/* get scatterlist from block layer */
 	sg = &crq->sg[0];
 	n_elem = blk_rq_map_sg(q, rq, sg);
 	if (n_elem <= 0) {
+		/* request with no s/g entries? */
 		carm_end_rq(host, crq, BLK_STS_IOERR);
-		return;		/* request with no s/g entries? */
+		spin_unlock_irq(&host->lock);
+		return BLK_STS_IOERR;
 	}
 
 	/* map scatterlist to PCI bus addresses */
-	n_elem = pci_map_sg(host->pdev, sg, n_elem, pci_dir);
+	n_elem = dma_map_sg(&host->pdev->dev, sg, n_elem, pci_dir);
 	if (n_elem <= 0) {
+		/* request with no s/g entries? */
 		carm_end_rq(host, crq, BLK_STS_IOERR);
-		return;		/* request with no s/g entries? */
+		spin_unlock_irq(&host->lock);
+		return BLK_STS_IOERR;
 	}
 	crq->n_elem = n_elem;
 	crq->port = port;
@@ -927,12 +932,13 @@ queue_one_request:
 	rc = carm_send_msg(host, crq);
 	if (rc) {
 		carm_put_request(host, crq);
-		blk_requeue_request(q, rq);
 		carm_push_q(host, q);
-		return;		/* call us again later, eventually */
+		spin_unlock_irq(&host->lock);
+		return BLK_STS_DEV_RESOURCE;
 	}
 
-	goto queue_one_request;
+	spin_unlock_irq(&host->lock);
+	return BLK_STS_OK;
 }
 
 static void carm_handle_array_info(struct carm_host *host,
@@ -1052,11 +1058,11 @@ static inline void carm_handle_rw(struct carm_host *host,
 	VPRINTK("ENTER\n");
 
 	if (rq_data_dir(crq->rq) == WRITE)
-		pci_dir = PCI_DMA_TODEVICE;
+		pci_dir = DMA_TO_DEVICE;
 	else
-		pci_dir = PCI_DMA_FROMDEVICE;
+		pci_dir = DMA_FROM_DEVICE;
 
-	pci_unmap_sg(host->pdev, &crq->sg[0], crq->n_elem, pci_dir);
+	dma_unmap_sg(&host->pdev->dev, &crq->sg[0], crq->n_elem, pci_dir);
 
 	carm_end_rq(host, crq, error);
 }
@@ -1485,6 +1491,14 @@ static int carm_init_host(struct carm_host *host)
 	return 0;
 }
 
+static const struct blk_mq_ops carm_oob_mq_ops = {
+	.queue_rq	= carm_oob_queue_rq,
+};
+
+static const struct blk_mq_ops carm_mq_ops = {
+	.queue_rq	= carm_queue_rq,
+};
+
 static int carm_init_disks(struct carm_host *host)
 {
 	unsigned int i;
@@ -1513,9 +1527,10 @@ static int carm_init_disks(struct carm_host *host)
 		disk->fops = &carm_bd_ops;
 		disk->private_data = port;
 
-		q = blk_init_queue(carm_rq_fn, &host->lock);
-		if (!q) {
-			rc = -ENOMEM;
+		q = blk_mq_init_sq_queue(&port->tag_set, &carm_mq_ops,
+					 max_queue, BLK_MQ_F_SHOULD_MERGE);
+		if (IS_ERR(q)) {
+			rc = PTR_ERR(q);
 			break;
 		}
 		disk->queue = q;
@@ -1533,14 +1548,18 @@ static void carm_free_disks(struct carm_host *host)
 	unsigned int i;
 
 	for (i = 0; i < CARM_MAX_PORTS; i++) {
-		struct gendisk *disk = host->port[i].disk;
+		struct carm_port *port = &host->port[i];
+		struct gendisk *disk = port->disk;
+
 		if (disk) {
 			struct request_queue *q = disk->queue;
 
 			if (disk->flags & GENHD_FL_UP)
 				del_gendisk(disk);
-			if (q)
+			if (q) {
+				blk_mq_free_tag_set(&port->tag_set);
 				blk_cleanup_queue(q);
+			}
 			put_disk(disk);
 		}
 	}
@@ -1548,8 +1567,8 @@ static void carm_free_disks(struct carm_host *host)
 
 static int carm_init_shm(struct carm_host *host)
 {
-	host->shm = pci_alloc_consistent(host->pdev, CARM_SHM_SIZE,
-					 &host->shm_dma);
+	host->shm = dma_alloc_coherent(&host->pdev->dev, CARM_SHM_SIZE,
+				       &host->shm_dma, GFP_KERNEL);
 	if (!host->shm)
 		return -ENOMEM;
 
@@ -1565,7 +1584,6 @@ static int carm_init_shm(struct carm_host *host)
 static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	struct carm_host *host;
-	unsigned int pci_dac;
 	int rc;
 	struct request_queue *q;
 	unsigned int i;
@@ -1580,28 +1598,12 @@ static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (rc)
 		goto err_out;
 
-#ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */
-	rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
-	if (!rc) {
-		rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
-		if (rc) {
-			printk(KERN_ERR DRV_NAME "(%s): consistent DMA mask failure\n",
-				pci_name(pdev));
-			goto err_out_regions;
-		}
-		pci_dac = 1;
-	} else {
-#endif
-		rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
-		if (rc) {
-			printk(KERN_ERR DRV_NAME "(%s): DMA mask failure\n",
-				pci_name(pdev));
-			goto err_out_regions;
-		}
-		pci_dac = 0;
-#ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */
+	rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+	if (rc) {
+		printk(KERN_ERR DRV_NAME "(%s): DMA mask failure\n",
+			pci_name(pdev));
+		goto err_out_regions;
 	}
-#endif
 
 	host = kzalloc(sizeof(*host), GFP_KERNEL);
 	if (!host) {
@@ -1612,7 +1614,6 @@ static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	host->pdev = pdev;
-	host->flags = pci_dac ? FL_DAC : 0;
 	spin_lock_init(&host->lock);
 	INIT_WORK(&host->fsm_task, carm_fsm_task);
 	init_completion(&host->probe_comp);
@@ -1636,12 +1637,13 @@ static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_out_iounmap;
 	}
 
-	q = blk_init_queue(carm_oob_rq_fn, &host->lock);
-	if (!q) {
+	q = blk_mq_init_sq_queue(&host->tag_set, &carm_oob_mq_ops, 1,
+					BLK_MQ_F_NO_SCHED);
+	if (IS_ERR(q)) {
 		printk(KERN_ERR DRV_NAME "(%s): OOB queue alloc failure\n",
 		       pci_name(pdev));
-		rc = -ENOMEM;
-		goto err_out_pci_free;
+		rc = PTR_ERR(q);
+		goto err_out_dma_free;
 	}
 	host->oob_q = q;
 	q->queuedata = host;
@@ -1705,8 +1707,9 @@ err_out_free_majors:
 	else if (host->major == 161)
 		clear_bit(1, &carm_major_alloc);
 	blk_cleanup_queue(host->oob_q);
-err_out_pci_free:
-	pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma);
+	blk_mq_free_tag_set(&host->tag_set);
+err_out_dma_free:
+	dma_free_coherent(&pdev->dev, CARM_SHM_SIZE, host->shm, host->shm_dma);
 err_out_iounmap:
 	iounmap(host->mmio);
 err_out_kfree:
@@ -1736,7 +1739,8 @@ static void carm_remove_one (struct pci_dev *pdev)
 	else if (host->major == 161)
 		clear_bit(1, &carm_major_alloc);
 	blk_cleanup_queue(host->oob_q);
-	pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma);
+	blk_mq_free_tag_set(&host->tag_set);
+	dma_free_coherent(&pdev->dev, CARM_SHM_SIZE, host->shm, host->shm_dma);
 	iounmap(host->mmio);
 	kfree(host);
 	pci_release_regions(pdev);

drivers/block/umem.c

@@ -363,12 +363,12 @@ static int add_bio(struct cardinfo *card)
 
 	vec = bio_iter_iovec(bio, card->current_iter);
 
-	dma_handle = pci_map_page(card->dev,
+	dma_handle = dma_map_page(&card->dev->dev,
 				  vec.bv_page,
 				  vec.bv_offset,
 				  vec.bv_len,
 				  bio_op(bio) == REQ_OP_READ ?
-				  PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
+				  DMA_FROM_DEVICE : DMA_TO_DEVICE);
 
 	p = &card->mm_pages[card->Ready];
 	desc = &p->desc[p->cnt];
@@ -421,7 +421,7 @@ static void process_page(unsigned long data)
 	struct cardinfo *card = (struct cardinfo *)data;
 	unsigned int dma_status = card->dma_status;
 
-	spin_lock_bh(&card->lock);
+	spin_lock(&card->lock);
 	if (card->Active < 0)
 		goto out_unlock;
 	page = &card->mm_pages[card->Active];
@@ -448,10 +448,10 @@ static void process_page(unsigned long data)
 				page->iter = page->bio->bi_iter;
 		}
 
-		pci_unmap_page(card->dev, desc->data_dma_handle,
+		dma_unmap_page(&card->dev->dev, desc->data_dma_handle,
 			       vec.bv_len,
 				 (control & DMASCR_TRANSFER_READ) ?
-				PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
+				DMA_TO_DEVICE : DMA_FROM_DEVICE);
 		if (control & DMASCR_HARD_ERROR) {
 			/* error */
 			bio->bi_status = BLK_STS_IOERR;
@@ -496,7 +496,7 @@ static void process_page(unsigned long data)
 		mm_start_io(card);
 	}
  out_unlock:
-	spin_unlock_bh(&card->lock);
+	spin_unlock(&card->lock);
 
 	while (return_bio) {
 		struct bio *bio = return_bio;
@@ -817,8 +817,8 @@ static int mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 	dev_printk(KERN_INFO, &dev->dev,
 	  "Micro Memory(tm) controller found (PCI Mem Module (Battery Backup))\n");
 
-	if (pci_set_dma_mask(dev, DMA_BIT_MASK(64)) &&
-	    pci_set_dma_mask(dev, DMA_BIT_MASK(32))) {
+	if (dma_set_mask(&dev->dev, DMA_BIT_MASK(64)) &&
+	    dma_set_mask(&dev->dev, DMA_BIT_MASK(32))) {
 		dev_printk(KERN_WARNING, &dev->dev, "NO suitable DMA found\n");
 		return  -ENOMEM;
 	}
@@ -871,12 +871,10 @@ static int mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 		goto failed_magic;
 	}
 
-	card->mm_pages[0].desc = pci_alloc_consistent(card->dev,
-						PAGE_SIZE * 2,
-						&card->mm_pages[0].page_dma);
-	card->mm_pages[1].desc = pci_alloc_consistent(card->dev,
-						PAGE_SIZE * 2,
-						&card->mm_pages[1].page_dma);
+	card->mm_pages[0].desc = dma_alloc_coherent(&card->dev->dev,
+			PAGE_SIZE * 2, &card->mm_pages[0].page_dma, GFP_KERNEL);
+	card->mm_pages[1].desc = dma_alloc_coherent(&card->dev->dev,
+			PAGE_SIZE * 2, &card->mm_pages[1].page_dma, GFP_KERNEL);
 	if (card->mm_pages[0].desc == NULL ||
 	    card->mm_pages[1].desc == NULL) {
 		dev_printk(KERN_ERR, &card->dev->dev, "alloc failed\n");
@@ -1002,13 +1000,13 @@ static int mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
  failed_req_irq:
  failed_alloc:
 	if (card->mm_pages[0].desc)
-		pci_free_consistent(card->dev, PAGE_SIZE*2,
-				    card->mm_pages[0].desc,
-				    card->mm_pages[0].page_dma);
+		dma_free_coherent(&card->dev->dev, PAGE_SIZE * 2,
+				  card->mm_pages[0].desc,
+				  card->mm_pages[0].page_dma);
 	if (card->mm_pages[1].desc)
-		pci_free_consistent(card->dev, PAGE_SIZE*2,
-				    card->mm_pages[1].desc,
-				    card->mm_pages[1].page_dma);
+		dma_free_coherent(&card->dev->dev, PAGE_SIZE * 2,
+				  card->mm_pages[1].desc,
+				  card->mm_pages[1].page_dma);
  failed_magic:
 	iounmap(card->csr_remap);
  failed_remap_csr:
@@ -1027,11 +1025,11 @@ static void mm_pci_remove(struct pci_dev *dev)
 	iounmap(card->csr_remap);
 
 	if (card->mm_pages[0].desc)
-		pci_free_consistent(card->dev, PAGE_SIZE*2,
+		dma_free_coherent(&card->dev->dev, PAGE_SIZE * 2,
 				    card->mm_pages[0].desc,
 				    card->mm_pages[0].page_dma);
 	if (card->mm_pages[1].desc)
-		pci_free_consistent(card->dev, PAGE_SIZE*2,
+		dma_free_coherent(&card->dev->dev, PAGE_SIZE * 2,
 				    card->mm_pages[1].desc,
 				    card->mm_pages[1].page_dma);
 	blk_cleanup_queue(card->queue);

drivers/block/virtio_blk.c

@@ -351,8 +351,8 @@ static int minor_to_index(int minor)
 	return minor >> PART_BITS;
 }
 
-static ssize_t virtblk_serial_show(struct device *dev,
-				struct device_attribute *attr, char *buf)
+static ssize_t serial_show(struct device *dev,
+			   struct device_attribute *attr, char *buf)
 {
 	struct gendisk *disk = dev_to_disk(dev);
 	int err;
@@ -371,7 +371,7 @@ static ssize_t virtblk_serial_show(struct device *dev,
 	return err;
 }
 
-static DEVICE_ATTR(serial, 0444, virtblk_serial_show, NULL);
+static DEVICE_ATTR_RO(serial);
 
 /* The queue's logical block size must be set before calling this */
 static void virtblk_update_capacity(struct virtio_blk *vblk, bool resize)
@@ -545,8 +545,8 @@ static const char *const virtblk_cache_types[] = {
 };
 
 static ssize_t
-virtblk_cache_type_store(struct device *dev, struct device_attribute *attr,
-			 const char *buf, size_t count)
+cache_type_store(struct device *dev, struct device_attribute *attr,
+		 const char *buf, size_t count)
 {
 	struct gendisk *disk = dev_to_disk(dev);
 	struct virtio_blk *vblk = disk->private_data;
@@ -564,8 +564,7 @@ virtblk_cache_type_store(struct device *dev, struct device_attribute *attr,
 }
 
 static ssize_t
-virtblk_cache_type_show(struct device *dev, struct device_attribute *attr,
-			 char *buf)
+cache_type_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct gendisk *disk = dev_to_disk(dev);
 	struct virtio_blk *vblk = disk->private_data;
@@ -575,12 +574,38 @@ virtblk_cache_type_show(struct device *dev, struct device_attribute *attr,
 	return snprintf(buf, 40, "%s\n", virtblk_cache_types[writeback]);
 }
 
-static const struct device_attribute dev_attr_cache_type_ro =
-	__ATTR(cache_type, 0444,
-	       virtblk_cache_type_show, NULL);
-static const struct device_attribute dev_attr_cache_type_rw =
-	__ATTR(cache_type, 0644,
-	       virtblk_cache_type_show, virtblk_cache_type_store);
+static DEVICE_ATTR_RW(cache_type);
+
+static struct attribute *virtblk_attrs[] = {
+	&dev_attr_serial.attr,
+	&dev_attr_cache_type.attr,
+	NULL,
+};
+
+static umode_t virtblk_attrs_are_visible(struct kobject *kobj,
+		struct attribute *a, int n)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct gendisk *disk = dev_to_disk(dev);
+	struct virtio_blk *vblk = disk->private_data;
+	struct virtio_device *vdev = vblk->vdev;
+
+	if (a == &dev_attr_cache_type.attr &&
+	    !virtio_has_feature(vdev, VIRTIO_BLK_F_CONFIG_WCE))
+		return S_IRUGO;
+
+	return a->mode;
+}
+
+static const struct attribute_group virtblk_attr_group = {
+	.attrs = virtblk_attrs,
+	.is_visible = virtblk_attrs_are_visible,
+};
+
+static const struct attribute_group *virtblk_attr_groups[] = {
+	&virtblk_attr_group,
+	NULL,
+};
 
 static int virtblk_init_request(struct blk_mq_tag_set *set, struct request *rq,
 		unsigned int hctx_idx, unsigned int numa_node)
@@ -780,24 +805,9 @@ static int virtblk_probe(struct virtio_device *vdev)
 	virtblk_update_capacity(vblk, false);
 	virtio_device_ready(vdev);
 
-	device_add_disk(&vdev->dev, vblk->disk);
-	err = device_create_file(disk_to_dev(vblk->disk), &dev_attr_serial);
-	if (err)
-		goto out_del_disk;
-
-	if (virtio_has_feature(vdev, VIRTIO_BLK_F_CONFIG_WCE))
-		err = device_create_file(disk_to_dev(vblk->disk),
-					 &dev_attr_cache_type_rw);
-	else
-		err = device_create_file(disk_to_dev(vblk->disk),
-					 &dev_attr_cache_type_ro);
-	if (err)
-		goto out_del_disk;
+	device_add_disk(&vdev->dev, vblk->disk, virtblk_attr_groups);
 	return 0;
 
-out_del_disk:
-	del_gendisk(vblk->disk);
-	blk_cleanup_queue(vblk->disk->queue);
 out_free_tags:
 	blk_mq_free_tag_set(&vblk->tag_set);
 out_put_disk:

drivers/block/xen-blkfront.c

@@ -2420,7 +2420,7 @@ static void blkfront_connect(struct blkfront_info *info)
 	for (i = 0; i < info->nr_rings; i++)
 		kick_pending_request_queues(&info->rinfo[i]);
 
-	device_add_disk(&info->xbdev->dev, info->gd);
+	device_add_disk(&info->xbdev->dev, info->gd, NULL);
 
 	info->is_ready = 1;
 	return;

drivers/block/xsysace.c

@@ -88,7 +88,7 @@
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/mutex.h>
 #include <linux/ata.h>
 #include <linux/hdreg.h>
@@ -209,6 +209,8 @@ struct ace_device {
 	struct device *dev;
 	struct request_queue *queue;
 	struct gendisk *gd;
+	struct blk_mq_tag_set tag_set;
+	struct list_head rq_list;
 
 	/* Inserted CF card parameters */
 	u16 cf_id[ATA_ID_WORDS];
@@ -462,18 +464,26 @@ static inline void ace_fsm_yieldirq(struct ace_device *ace)
 	ace->fsm_continue_flag = 0;
 }
 
+static bool ace_has_next_request(struct request_queue *q)
+{
+	struct ace_device *ace = q->queuedata;
+
+	return !list_empty(&ace->rq_list);
+}
+
 /* Get the next read/write request; ending requests that we don't handle */
 static struct request *ace_get_next_request(struct request_queue *q)
 {
-	struct request *req;
+	struct ace_device *ace = q->queuedata;
+	struct request *rq;
 
-	while ((req = blk_peek_request(q)) != NULL) {
-		if (!blk_rq_is_passthrough(req))
-			break;
-		blk_start_request(req);
-		__blk_end_request_all(req, BLK_STS_IOERR);
+	rq = list_first_entry_or_null(&ace->rq_list, struct request, queuelist);
+	if (rq) {
+		list_del_init(&rq->queuelist);
+		blk_mq_start_request(rq);
 	}
-	return req;
+
+	return NULL;
 }
 
 static void ace_fsm_dostate(struct ace_device *ace)
@@ -499,11 +509,11 @@ static void ace_fsm_dostate(struct ace_device *ace)
 
 		/* Drop all in-flight and pending requests */
 		if (ace->req) {
-			__blk_end_request_all(ace->req, BLK_STS_IOERR);
+			blk_mq_end_request(ace->req, BLK_STS_IOERR);
 			ace->req = NULL;
 		}
-		while ((req = blk_fetch_request(ace->queue)) != NULL)
-			__blk_end_request_all(req, BLK_STS_IOERR);
+		while ((req = ace_get_next_request(ace->queue)) != NULL)
+			blk_mq_end_request(req, BLK_STS_IOERR);
 
 		/* Drop back to IDLE state and notify waiters */
 		ace->fsm_state = ACE_FSM_STATE_IDLE;
@@ -517,7 +527,7 @@ static void ace_fsm_dostate(struct ace_device *ace)
 	switch (ace->fsm_state) {
 	case ACE_FSM_STATE_IDLE:
 		/* See if there is anything to do */
-		if (ace->id_req_count || ace_get_next_request(ace->queue)) {
+		if (ace->id_req_count || ace_has_next_request(ace->queue)) {
 			ace->fsm_iter_num++;
 			ace->fsm_state = ACE_FSM_STATE_REQ_LOCK;
 			mod_timer(&ace->stall_timer, jiffies + HZ);
@@ -651,7 +661,6 @@ static void ace_fsm_dostate(struct ace_device *ace)
 			ace->fsm_state = ACE_FSM_STATE_IDLE;
 			break;
 		}
-		blk_start_request(req);
 
 		/* Okay, it's a data request, set it up for transfer */
 		dev_dbg(ace->dev,
@@ -728,7 +737,8 @@ static void ace_fsm_dostate(struct ace_device *ace)
 		}
 
 		/* bio finished; is there another one? */
-		if (__blk_end_request_cur(ace->req, BLK_STS_OK)) {
+		if (blk_update_request(ace->req, BLK_STS_OK,
+		    blk_rq_cur_bytes(ace->req))) {
 			/* dev_dbg(ace->dev, "next block; h=%u c=%u\n",
 			 *      blk_rq_sectors(ace->req),
 			 *      blk_rq_cur_sectors(ace->req));
@@ -854,17 +864,23 @@ static irqreturn_t ace_interrupt(int irq, void *dev_id)
 /* ---------------------------------------------------------------------
  * Block ops
  */
-static void ace_request(struct request_queue * q)
+static blk_status_t ace_queue_rq(struct blk_mq_hw_ctx *hctx,
+				 const struct blk_mq_queue_data *bd)
 {
-	struct request *req;
-	struct ace_device *ace;
-
-	req = ace_get_next_request(q);
+	struct ace_device *ace = hctx->queue->queuedata;
+	struct request *req = bd->rq;
 
-	if (req) {
-		ace = req->rq_disk->private_data;
-		tasklet_schedule(&ace->fsm_tasklet);
+	if (blk_rq_is_passthrough(req)) {
+		blk_mq_start_request(req);
+		return BLK_STS_IOERR;
 	}
+
+	spin_lock_irq(&ace->lock);
+	list_add_tail(&req->queuelist, &ace->rq_list);
+	spin_unlock_irq(&ace->lock);
+
+	tasklet_schedule(&ace->fsm_tasklet);
+	return BLK_STS_OK;
 }
 
 static unsigned int ace_check_events(struct gendisk *gd, unsigned int clearing)
@@ -957,6 +973,10 @@ static const struct block_device_operations ace_fops = {
 	.getgeo = ace_getgeo,
 };
 
+static const struct blk_mq_ops ace_mq_ops = {
+	.queue_rq	= ace_queue_rq,
+};
+
 /* --------------------------------------------------------------------
  * SystemACE device setup/teardown code
  */
@@ -972,6 +992,7 @@ static int ace_setup(struct ace_device *ace)
 
 	spin_lock_init(&ace->lock);
 	init_completion(&ace->id_completion);
+	INIT_LIST_HEAD(&ace->rq_list);
 
 	/*
 	 * Map the device
@@ -989,9 +1010,15 @@ static int ace_setup(struct ace_device *ace)
 	/*
 	 * Initialize the request queue
 	 */
-	ace->queue = blk_init_queue(ace_request, &ace->lock);
-	if (ace->queue == NULL)
+	ace->queue = blk_mq_init_sq_queue(&ace->tag_set, &ace_mq_ops, 2,
+						BLK_MQ_F_SHOULD_MERGE);
+	if (IS_ERR(ace->queue)) {
+		rc = PTR_ERR(ace->queue);
+		ace->queue = NULL;
 		goto err_blk_initq;
+	}
+	ace->queue->queuedata = ace;
+
 	blk_queue_logical_block_size(ace->queue, 512);
 	blk_queue_bounce_limit(ace->queue, BLK_BOUNCE_HIGH);
 
@@ -1066,6 +1093,7 @@ err_read:
 	put_disk(ace->gd);
 err_alloc_disk:
 	blk_cleanup_queue(ace->queue);
+	blk_mq_free_tag_set(&ace->tag_set);
 err_blk_initq:
 	iounmap(ace->baseaddr);
 err_ioremap:
@@ -1081,8 +1109,10 @@ static void ace_teardown(struct ace_device *ace)
 		put_disk(ace->gd);
 	}
 
-	if (ace->queue)
+	if (ace->queue) {
 		blk_cleanup_queue(ace->queue);
+		blk_mq_free_tag_set(&ace->tag_set);
+	}
 
 	tasklet_kill(&ace->fsm_tasklet);
 

drivers/block/z2ram.c

@@ -31,7 +31,7 @@
 #include <linux/vmalloc.h>
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/bitops.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
@@ -66,43 +66,44 @@ static DEFINE_SPINLOCK(z2ram_lock);
 
 static struct gendisk *z2ram_gendisk;
 
-static void do_z2_request(struct request_queue *q)
+static blk_status_t z2_queue_rq(struct blk_mq_hw_ctx *hctx,
+				const struct blk_mq_queue_data *bd)
 {
-	struct request *req;
-
-	req = blk_fetch_request(q);
-	while (req) {
-		unsigned long start = blk_rq_pos(req) << 9;
-		unsigned long len  = blk_rq_cur_bytes(req);
-		blk_status_t err = BLK_STS_OK;
-
-		if (start + len > z2ram_size) {
-			pr_err(DEVICE_NAME ": bad access: block=%llu, "
-			       "count=%u\n",
-			       (unsigned long long)blk_rq_pos(req),
-			       blk_rq_cur_sectors(req));
-			err = BLK_STS_IOERR;
-			goto done;
-		}
-		while (len) {
-			unsigned long addr = start & Z2RAM_CHUNKMASK;
-			unsigned long size = Z2RAM_CHUNKSIZE - addr;
-			void *buffer = bio_data(req->bio);
-
-			if (len < size)
-				size = len;
-			addr += z2ram_map[ start >> Z2RAM_CHUNKSHIFT ];
-			if (rq_data_dir(req) == READ)
-				memcpy(buffer, (char *)addr, size);
-			else
-				memcpy((char *)addr, buffer, size);
-			start += size;
-			len -= size;
-		}
-	done:
-		if (!__blk_end_request_cur(req, err))
-			req = blk_fetch_request(q);
+	struct request *req = bd->rq;
+	unsigned long start = blk_rq_pos(req) << 9;
+	unsigned long len  = blk_rq_cur_bytes(req);
+
+	blk_mq_start_request(req);
+
+	if (start + len > z2ram_size) {
+		pr_err(DEVICE_NAME ": bad access: block=%llu, "
+		       "count=%u\n",
+		       (unsigned long long)blk_rq_pos(req),
+		       blk_rq_cur_sectors(req));
+		return BLK_STS_IOERR;
+	}
+
+	spin_lock_irq(&z2ram_lock);
+
+	while (len) {
+		unsigned long addr = start & Z2RAM_CHUNKMASK;
+		unsigned long size = Z2RAM_CHUNKSIZE - addr;
+		void *buffer = bio_data(req->bio);
+
+		if (len < size)
+			size = len;
+		addr += z2ram_map[ start >> Z2RAM_CHUNKSHIFT ];
+		if (rq_data_dir(req) == READ)
+			memcpy(buffer, (char *)addr, size);
+		else
+			memcpy((char *)addr, buffer, size);
+		start += size;
+		len -= size;
 	}
+
+	spin_unlock_irq(&z2ram_lock);
+	blk_mq_end_request(req, BLK_STS_OK);
+	return BLK_STS_OK;
 }
 
 static void
@@ -337,6 +338,11 @@ static struct kobject *z2_find(dev_t dev, int *part, void *data)
 }
 
 static struct request_queue *z2_queue;
+static struct blk_mq_tag_set tag_set;
+
+static const struct blk_mq_ops z2_mq_ops = {
+	.queue_rq	= z2_queue_rq,
+};
 
 static int __init 
 z2_init(void)
@@ -355,9 +361,13 @@ z2_init(void)
     if (!z2ram_gendisk)
 	goto out_disk;
 
-    z2_queue = blk_init_queue(do_z2_request, &z2ram_lock);
-    if (!z2_queue)
+    z2_queue = blk_mq_init_sq_queue(&tag_set, &z2_mq_ops, 16,
+					BLK_MQ_F_SHOULD_MERGE);
+    if (IS_ERR(z2_queue)) {
+	ret = PTR_ERR(z2_queue);
+	z2_queue = NULL;
 	goto out_queue;
+    }
 
     z2ram_gendisk->major = Z2RAM_MAJOR;
     z2ram_gendisk->first_minor = 0;
@@ -387,6 +397,7 @@ static void __exit z2_exit(void)
     del_gendisk(z2ram_gendisk);
     put_disk(z2ram_gendisk);
     blk_cleanup_queue(z2_queue);
+    blk_mq_free_tag_set(&tag_set);
 
     if ( current_device != -1 )
     {

drivers/block/zram/Kconfig

@@ -3,7 +3,6 @@ config ZRAM
 	tristate "Compressed RAM block device support"
 	depends on BLOCK && SYSFS && ZSMALLOC && CRYPTO
 	select CRYPTO_LZO
-	default n
 	help
 	  Creates virtual block devices called /dev/zramX (X = 0, 1, ...).
 	  Pages written to these disks are compressed and stored in memory
@@ -18,7 +17,6 @@ config ZRAM
 config ZRAM_WRITEBACK
        bool "Write back incompressible page to backing device"
        depends on ZRAM
-       default n
        help
 	 With incompressible page, there is no memory saving to keep it
 	 in memory. Instead, write it out to backing device.

drivers/block/zram/zram_drv.c

@@ -1636,6 +1636,11 @@ static const struct attribute_group zram_disk_attr_group = {
 	.attrs = zram_disk_attrs,
 };
 
+static const struct attribute_group *zram_disk_attr_groups[] = {
+	&zram_disk_attr_group,
+	NULL,
+};
+
 /*
  * Allocate and initialize new zram device. the function returns
  * '>= 0' device_id upon success, and negative value otherwise.
@@ -1716,24 +1721,14 @@ static int zram_add(void)
 
 	zram->disk->queue->backing_dev_info->capabilities |=
 			(BDI_CAP_STABLE_WRITES | BDI_CAP_SYNCHRONOUS_IO);
-	add_disk(zram->disk);
-
-	ret = sysfs_create_group(&disk_to_dev(zram->disk)->kobj,
-				&zram_disk_attr_group);
-	if (ret < 0) {
-		pr_err("Error creating sysfs group for device %d\n",
-				device_id);
-		goto out_free_disk;
-	}
+	device_add_disk(NULL, zram->disk, zram_disk_attr_groups);
+
 	strlcpy(zram->compressor, default_compressor, sizeof(zram->compressor));
 
 	zram_debugfs_register(zram);
 	pr_info("Added device: %s\n", zram->disk->disk_name);
 	return device_id;
 
-out_free_disk:
-	del_gendisk(zram->disk);
-	put_disk(zram->disk);
 out_free_queue:
 	blk_cleanup_queue(queue);
 out_free_idr:
@@ -1762,15 +1757,6 @@ static int zram_remove(struct zram *zram)
 	mutex_unlock(&bdev->bd_mutex);
 
 	zram_debugfs_unregister(zram);
-	/*
-	 * Remove sysfs first, so no one will perform a disksize
-	 * store while we destroy the devices. This also helps during
-	 * hot_remove -- zram_reset_device() is the last holder of
-	 * ->init_lock, no later/concurrent disksize_store() or any
-	 * other sysfs handlers are possible.
-	 */
-	sysfs_remove_group(&disk_to_dev(zram->disk)->kobj,
-			&zram_disk_attr_group);
 
 	/* Make sure all the pending I/O are finished */
 	fsync_bdev(bdev);

drivers/cdrom/cdrom.c

@@ -410,10 +410,10 @@ static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
  * hack to have the capability flags defined const, while we can still
  * change it here without gcc complaining at every line.
  */
-#define ENSURE(call, bits)			\
-do {						\
-	if (cdo->call == NULL)			\
-		*change_capability &= ~(bits);	\
+#define ENSURE(cdo, call, bits)					\
+do {								\
+	if (cdo->call == NULL)					\
+		WARN_ON_ONCE((cdo)->capability & (bits));	\
 } while (0)
 
 /*
@@ -589,7 +589,6 @@ int register_cdrom(struct cdrom_device_info *cdi)
 {
 	static char banner_printed;
 	const struct cdrom_device_ops *cdo = cdi->ops;
-	int *change_capability = (int *)&cdo->capability; /* hack */
 
 	cd_dbg(CD_OPEN, "entering register_cdrom\n");
 
@@ -601,16 +600,16 @@ int register_cdrom(struct cdrom_device_info *cdi)
 		cdrom_sysctl_register();
 	}
 
-	ENSURE(drive_status, CDC_DRIVE_STATUS);
+	ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
 	if (cdo->check_events == NULL && cdo->media_changed == NULL)
-		*change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
-	ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
-	ENSURE(lock_door, CDC_LOCK);
-	ENSURE(select_speed, CDC_SELECT_SPEED);
-	ENSURE(get_last_session, CDC_MULTI_SESSION);
-	ENSURE(get_mcn, CDC_MCN);
-	ENSURE(reset, CDC_RESET);
-	ENSURE(generic_packet, CDC_GENERIC_PACKET);
+		WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
+	ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
+	ENSURE(cdo, lock_door, CDC_LOCK);
+	ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
+	ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
+	ENSURE(cdo, get_mcn, CDC_MCN);
+	ENSURE(cdo, reset, CDC_RESET);
+	ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
 	cdi->mc_flags = 0;
 	cdi->options = CDO_USE_FFLAGS;
 
@@ -2445,7 +2444,7 @@ static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
 		return -ENOSYS;
 
 	if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
-		if ((int)arg >= cdi->capacity)
+		if (arg >= cdi->capacity)
 			return -EINVAL;
 	}
 

drivers/cdrom/gdrom.c

@@ -31,12 +31,11 @@
 #include <linux/cdrom.h>
 #include <linux/genhd.h>
 #include <linux/bio.h>
-#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
 #include <linux/interrupt.h>
 #include <linux/device.h>
 #include <linux/mutex.h>
 #include <linux/wait.h>
-#include <linux/workqueue.h>
 #include <linux/platform_device.h>
 #include <scsi/scsi.h>
 #include <asm/io.h>
@@ -102,11 +101,6 @@ static int gdrom_major;
 static DECLARE_WAIT_QUEUE_HEAD(command_queue);
 static DECLARE_WAIT_QUEUE_HEAD(request_queue);
 
-static DEFINE_SPINLOCK(gdrom_lock);
-static void gdrom_readdisk_dma(struct work_struct *work);
-static DECLARE_WORK(work, gdrom_readdisk_dma);
-static LIST_HEAD(gdrom_deferred);
-
 struct gdromtoc {
 	unsigned int entry[99];
 	unsigned int first, last;
@@ -122,6 +116,7 @@ static struct gdrom_unit {
 	char disk_type;
 	struct gdromtoc *toc;
 	struct request_queue *gdrom_rq;
+	struct blk_mq_tag_set tag_set;
 } gd;
 
 struct gdrom_id {
@@ -584,103 +579,83 @@ static int gdrom_set_interrupt_handlers(void)
  * 9 -> sectors >> 8
  * 10 -> sectors
  */
-static void gdrom_readdisk_dma(struct work_struct *work)
+static blk_status_t gdrom_readdisk_dma(struct request *req)
 {
 	int block, block_cnt;
 	blk_status_t err;
 	struct packet_command *read_command;
-	struct list_head *elem, *next;
-	struct request *req;
 	unsigned long timeout;
 
-	if (list_empty(&gdrom_deferred))
-		return;
 	read_command = kzalloc(sizeof(struct packet_command), GFP_KERNEL);
 	if (!read_command)
-		return; /* get more memory later? */
+		return BLK_STS_RESOURCE;
+
 	read_command->cmd[0] = 0x30;
 	read_command->cmd[1] = 0x20;
-	spin_lock(&gdrom_lock);
-	list_for_each_safe(elem, next, &gdrom_deferred) {
-		req = list_entry(elem, struct request, queuelist);
-		spin_unlock(&gdrom_lock);
-		block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET;
-		block_cnt = blk_rq_sectors(req)/GD_TO_BLK;
-		__raw_writel(virt_to_phys(bio_data(req->bio)), GDROM_DMA_STARTADDR_REG);
-		__raw_writel(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG);
-		__raw_writel(1, GDROM_DMA_DIRECTION_REG);
-		__raw_writel(1, GDROM_DMA_ENABLE_REG);
-		read_command->cmd[2] = (block >> 16) & 0xFF;
-		read_command->cmd[3] = (block >> 8) & 0xFF;
-		read_command->cmd[4] = block & 0xFF;
-		read_command->cmd[8] = (block_cnt >> 16) & 0xFF;
-		read_command->cmd[9] = (block_cnt >> 8) & 0xFF;
-		read_command->cmd[10] = block_cnt & 0xFF;
-		/* set for DMA */
-		__raw_writeb(1, GDROM_ERROR_REG);
-		/* other registers */
-		__raw_writeb(0, GDROM_SECNUM_REG);
-		__raw_writeb(0, GDROM_BCL_REG);
-		__raw_writeb(0, GDROM_BCH_REG);
-		__raw_writeb(0, GDROM_DSEL_REG);
-		__raw_writeb(0, GDROM_INTSEC_REG);
-		/* Wait for registers to reset after any previous activity */
-		timeout = jiffies + HZ / 2;
-		while (gdrom_is_busy() && time_before(jiffies, timeout))
-			cpu_relax();
-		__raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
-		timeout = jiffies + HZ / 2;
-		/* Wait for packet command to finish */
-		while (gdrom_is_busy() && time_before(jiffies, timeout))
-			cpu_relax();
-		gd.pending = 1;
-		gd.transfer = 1;
-		outsw(GDROM_DATA_REG, &read_command->cmd, 6);
-		timeout = jiffies + HZ / 2;
-		/* Wait for any pending DMA to finish */
-		while (__raw_readb(GDROM_DMA_STATUS_REG) &&
-			time_before(jiffies, timeout))
-			cpu_relax();
-		/* start transfer */
-		__raw_writeb(1, GDROM_DMA_STATUS_REG);
-		wait_event_interruptible_timeout(request_queue,
-			gd.transfer == 0, GDROM_DEFAULT_TIMEOUT);
-		err = gd.transfer ? BLK_STS_IOERR : BLK_STS_OK;
-		gd.transfer = 0;
-		gd.pending = 0;
-		/* now seek to take the request spinlock
-		* before handling ending the request */
-		spin_lock(&gdrom_lock);
-		list_del_init(&req->queuelist);
-		__blk_end_request_all(req, err);
-	}
-	spin_unlock(&gdrom_lock);
+	block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET;
+	block_cnt = blk_rq_sectors(req)/GD_TO_BLK;
+	__raw_writel(virt_to_phys(bio_data(req->bio)), GDROM_DMA_STARTADDR_REG);
+	__raw_writel(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG);
+	__raw_writel(1, GDROM_DMA_DIRECTION_REG);
+	__raw_writel(1, GDROM_DMA_ENABLE_REG);
+	read_command->cmd[2] = (block >> 16) & 0xFF;
+	read_command->cmd[3] = (block >> 8) & 0xFF;
+	read_command->cmd[4] = block & 0xFF;
+	read_command->cmd[8] = (block_cnt >> 16) & 0xFF;
+	read_command->cmd[9] = (block_cnt >> 8) & 0xFF;
+	read_command->cmd[10] = block_cnt & 0xFF;
+	/* set for DMA */
+	__raw_writeb(1, GDROM_ERROR_REG);
+	/* other registers */
+	__raw_writeb(0, GDROM_SECNUM_REG);
+	__raw_writeb(0, GDROM_BCL_REG);
+	__raw_writeb(0, GDROM_BCH_REG);
+	__raw_writeb(0, GDROM_DSEL_REG);
+	__raw_writeb(0, GDROM_INTSEC_REG);
+	/* Wait for registers to reset after any previous activity */
+	timeout = jiffies + HZ / 2;
+	while (gdrom_is_busy() && time_before(jiffies, timeout))
+		cpu_relax();
+	__raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
+	timeout = jiffies + HZ / 2;
+	/* Wait for packet command to finish */
+	while (gdrom_is_busy() && time_before(jiffies, timeout))
+		cpu_relax();
+	gd.pending = 1;
+	gd.transfer = 1;
+	outsw(GDROM_DATA_REG, &read_command->cmd, 6);
+	timeout = jiffies + HZ / 2;
+	/* Wait for any pending DMA to finish */
+	while (__raw_readb(GDROM_DMA_STATUS_REG) &&
+		time_before(jiffies, timeout))
+		cpu_relax();
+	/* start transfer */
+	__raw_writeb(1, GDROM_DMA_STATUS_REG);
+	wait_event_interruptible_timeout(request_queue,
+		gd.transfer == 0, GDROM_DEFAULT_TIMEOUT);
+	err = gd.transfer ? BLK_STS_IOERR : BLK_STS_OK;
+	gd.transfer = 0;
+	gd.pending = 0;
+
+	blk_mq_end_request(req, err);
 	kfree(read_command);
+	return BLK_STS_OK;
 }
 
-static void gdrom_request(struct request_queue *rq)
-{
-	struct request *req;
-
-	while ((req = blk_fetch_request(rq)) != NULL) {
-		switch (req_op(req)) {
-		case REQ_OP_READ:
-			/*
-			 * Add to list of deferred work and then schedule
-			 * workqueue.
-			 */
-			list_add_tail(&req->queuelist, &gdrom_deferred);
-			schedule_work(&work);
-			break;
-		case REQ_OP_WRITE:
-			pr_notice("Read only device - write request ignored\n");
-			__blk_end_request_all(req, BLK_STS_IOERR);
-			break;
-		default:
-			printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");
-			__blk_end_request_all(req, BLK_STS_IOERR);
-			break;
-		}
+static blk_status_t gdrom_queue_rq(struct blk_mq_hw_ctx *hctx,
+				   const struct blk_mq_queue_data *bd)
+{
+	blk_mq_start_request(bd->rq);
+
+	switch (req_op(bd->rq)) {
+	case REQ_OP_READ:
+		return gdrom_readdisk_dma(bd->rq);
+	case REQ_OP_WRITE:
+		pr_notice("Read only device - write request ignored\n");
+		return BLK_STS_IOERR;
+	default:
+		printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");
+		return BLK_STS_IOERR;
 	}
 }
 
@@ -768,6 +743,10 @@ static int probe_gdrom_setupqueue(void)
 	return gdrom_init_dma_mode();
 }
 
+static const struct blk_mq_ops gdrom_mq_ops = {
+	.queue_rq	= gdrom_queue_rq,
+};
+
 /*
  * register this as a block device and as compliant with the
  * universal CD Rom driver interface
@@ -811,11 +790,15 @@ static int probe_gdrom(struct platform_device *devptr)
 	err = gdrom_set_interrupt_handlers();
 	if (err)
 		goto probe_fail_cmdirq_register;
-	gd.gdrom_rq = blk_init_queue(gdrom_request, &gdrom_lock);
-	if (!gd.gdrom_rq) {
-		err = -ENOMEM;
+
+	gd.gdrom_rq = blk_mq_init_sq_queue(&gd.tag_set, &gdrom_mq_ops, 1,
+				BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING);
+	if (IS_ERR(gd.gdrom_rq)) {
+		rc = PTR_ERR(gd.gdrom_rq);
+		gd.gdrom_rq = NULL;
 		goto probe_fail_requestq;
 	}
+
 	blk_queue_bounce_limit(gd.gdrom_rq, BLK_BOUNCE_HIGH);
 
 	err = probe_gdrom_setupqueue();
@@ -832,6 +815,7 @@ static int probe_gdrom(struct platform_device *devptr)
 
 probe_fail_toc:
 	blk_cleanup_queue(gd.gdrom_rq);
+	blk_mq_free_tag_set(&gd.tag_set);
 probe_fail_requestq:
 	free_irq(HW_EVENT_GDROM_DMA, &gd);
 	free_irq(HW_EVENT_GDROM_CMD, &gd);
@@ -849,8 +833,8 @@ probe_fail_no_mem:
 
 static int remove_gdrom(struct platform_device *devptr)
 {
-	flush_work(&work);
 	blk_cleanup_queue(gd.gdrom_rq);
+	blk_mq_free_tag_set(&gd.tag_set);
 	free_irq(HW_EVENT_GDROM_CMD, &gd);
 	free_irq(HW_EVENT_GDROM_DMA, &gd);
 	del_gendisk(gd.disk);

drivers/ide/ide-cd.c

@@ -1784,7 +1784,7 @@ static int ide_cd_probe(ide_drive_t *drive)
 	ide_cd_read_toc(drive);
 	g->fops = &idecd_ops;
 	g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
-	device_add_disk(&drive->gendev, g);
+	device_add_disk(&drive->gendev, g, NULL);
 	return 0;
 
 out_free_disk:

drivers/ide/ide-gd.c

@@ -416,7 +416,7 @@ static int ide_gd_probe(ide_drive_t *drive)
 	if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
 		g->flags = GENHD_FL_REMOVABLE;
 	g->fops = &ide_gd_ops;
-	device_add_disk(&drive->gendev, g);
+	device_add_disk(&drive->gendev, g, NULL);
 	return 0;
 
 out_free_disk:

drivers/lightnvm/Kconfig

@@ -4,8 +4,7 @@
 
 menuconfig NVM
 	bool "Open-Channel SSD target support"
-	depends on BLOCK && PCI
-	select BLK_DEV_NVME
+	depends on BLOCK
 	help
 	  Say Y here to get to enable Open-channel SSDs.
 

drivers/lightnvm/core.c

@@ -355,6 +355,11 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 		return -EINVAL;
 	}
 
+	if ((tt->flags & NVM_TGT_F_HOST_L2P) != (dev->geo.dom & NVM_RSP_L2P)) {
+		pr_err("nvm: device is incompatible with target L2P type.\n");
+		return -EINVAL;
+	}
+
 	if (nvm_target_exists(create->tgtname)) {
 		pr_err("nvm: target name already exists (%s)\n",
 							create->tgtname);
@@ -598,22 +603,16 @@ static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev,
 
 static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
 {
-	if (rqd->nr_ppas == 1) {
-		nvm_ppa_tgt_to_dev(tgt_dev, &rqd->ppa_addr, 1);
-		return;
-	}
+	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
 
-	nvm_ppa_tgt_to_dev(tgt_dev, rqd->ppa_list, rqd->nr_ppas);
+	nvm_ppa_tgt_to_dev(tgt_dev, ppa_list, rqd->nr_ppas);
 }
 
 static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
 {
-	if (rqd->nr_ppas == 1) {
-		nvm_ppa_dev_to_tgt(tgt_dev, &rqd->ppa_addr, 1);
-		return;
-	}
+	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
 
-	nvm_ppa_dev_to_tgt(tgt_dev, rqd->ppa_list, rqd->nr_ppas);
+	nvm_ppa_dev_to_tgt(tgt_dev, ppa_list, rqd->nr_ppas);
 }
 
 int nvm_register_tgt_type(struct nvm_tgt_type *tt)
@@ -712,45 +711,23 @@ static void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev,
 	nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
 }
 
-int nvm_get_chunk_meta(struct nvm_tgt_dev *tgt_dev, struct nvm_chk_meta *meta,
-		struct ppa_addr ppa, int nchks)
+static int nvm_set_flags(struct nvm_geo *geo, struct nvm_rq *rqd)
 {
-	struct nvm_dev *dev = tgt_dev->parent;
-
-	nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1);
-
-	return dev->ops->get_chk_meta(tgt_dev->parent, meta,
-						(sector_t)ppa.ppa, nchks);
-}
-EXPORT_SYMBOL(nvm_get_chunk_meta);
-
-int nvm_set_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
-		       int nr_ppas, int type)
-{
-	struct nvm_dev *dev = tgt_dev->parent;
-	struct nvm_rq rqd;
-	int ret;
+	int flags = 0;
 
-	if (nr_ppas > NVM_MAX_VLBA) {
-		pr_err("nvm: unable to update all blocks atomically\n");
-		return -EINVAL;
-	}
+	if (geo->version == NVM_OCSSD_SPEC_20)
+		return 0;
 
-	memset(&rqd, 0, sizeof(struct nvm_rq));
+	if (rqd->is_seq)
+		flags |= geo->pln_mode >> 1;
 
-	nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas);
-	nvm_rq_tgt_to_dev(tgt_dev, &rqd);
+	if (rqd->opcode == NVM_OP_PREAD)
+		flags |= (NVM_IO_SCRAMBLE_ENABLE | NVM_IO_SUSPEND);
+	else if (rqd->opcode == NVM_OP_PWRITE)
+		flags |= NVM_IO_SCRAMBLE_ENABLE;
 
-	ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
-	nvm_free_rqd_ppalist(tgt_dev, &rqd);
-	if (ret) {
-		pr_err("nvm: failed bb mark\n");
-		return -EINVAL;
-	}
-
-	return 0;
+	return flags;
 }
-EXPORT_SYMBOL(nvm_set_tgt_bb_tbl);
 
 int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
 {
@@ -763,6 +740,7 @@ int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
 	nvm_rq_tgt_to_dev(tgt_dev, rqd);
 
 	rqd->dev = tgt_dev;
+	rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd);
 
 	/* In case of error, fail with right address format */
 	ret = dev->ops->submit_io(dev, rqd);
@@ -783,6 +761,7 @@ int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
 	nvm_rq_tgt_to_dev(tgt_dev, rqd);
 
 	rqd->dev = tgt_dev;
+	rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd);
 
 	/* In case of error, fail with right address format */
 	ret = dev->ops->submit_io_sync(dev, rqd);
@@ -805,27 +784,159 @@ void nvm_end_io(struct nvm_rq *rqd)
 }
 EXPORT_SYMBOL(nvm_end_io);
 
+static int nvm_submit_io_sync_raw(struct nvm_dev *dev, struct nvm_rq *rqd)
+{
+	if (!dev->ops->submit_io_sync)
+		return -ENODEV;
+
+	rqd->flags = nvm_set_flags(&dev->geo, rqd);
+
+	return dev->ops->submit_io_sync(dev, rqd);
+}
+
+static int nvm_bb_chunk_sense(struct nvm_dev *dev, struct ppa_addr ppa)
+{
+	struct nvm_rq rqd = { NULL };
+	struct bio bio;
+	struct bio_vec bio_vec;
+	struct page *page;
+	int ret;
+
+	page = alloc_page(GFP_KERNEL);
+	if (!page)
+		return -ENOMEM;
+
+	bio_init(&bio, &bio_vec, 1);
+	bio_add_page(&bio, page, PAGE_SIZE, 0);
+	bio_set_op_attrs(&bio, REQ_OP_READ, 0);
+
+	rqd.bio = &bio;
+	rqd.opcode = NVM_OP_PREAD;
+	rqd.is_seq = 1;
+	rqd.nr_ppas = 1;
+	rqd.ppa_addr = generic_to_dev_addr(dev, ppa);
+
+	ret = nvm_submit_io_sync_raw(dev, &rqd);
+	if (ret)
+		return ret;
+
+	__free_page(page);
+
+	return rqd.error;
+}
+
 /*
- * folds a bad block list from its plane representation to its virtual
- * block representation. The fold is done in place and reduced size is
- * returned.
- *
- * If any of the planes status are bad or grown bad block, the virtual block
- * is marked bad. If not bad, the first plane state acts as the block state.
+ * Scans a 1.2 chunk first and last page to determine if its state.
+ * If the chunk is found to be open, also scan it to update the write
+ * pointer.
  */
-int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
+static int nvm_bb_chunk_scan(struct nvm_dev *dev, struct ppa_addr ppa,
+			     struct nvm_chk_meta *meta)
 {
 	struct nvm_geo *geo = &dev->geo;
-	int blk, offset, pl, blktype;
+	int ret, pg, pl;
 
-	if (nr_blks != geo->num_chk * geo->pln_mode)
-		return -EINVAL;
+	/* sense first page */
+	ret = nvm_bb_chunk_sense(dev, ppa);
+	if (ret < 0) /* io error */
+		return ret;
+	else if (ret == 0) /* valid data */
+		meta->state = NVM_CHK_ST_OPEN;
+	else if (ret > 0) {
+		/*
+		 * If empty page, the chunk is free, else it is an
+		 * actual io error. In that case, mark it offline.
+		 */
+		switch (ret) {
+		case NVM_RSP_ERR_EMPTYPAGE:
+			meta->state = NVM_CHK_ST_FREE;
+			return 0;
+		case NVM_RSP_ERR_FAILCRC:
+		case NVM_RSP_ERR_FAILECC:
+		case NVM_RSP_WARN_HIGHECC:
+			meta->state = NVM_CHK_ST_OPEN;
+			goto scan;
+		default:
+			return -ret; /* other io error */
+		}
+	}
+
+	/* sense last page */
+	ppa.g.pg = geo->num_pg - 1;
+	ppa.g.pl = geo->num_pln - 1;
+
+	ret = nvm_bb_chunk_sense(dev, ppa);
+	if (ret < 0) /* io error */
+		return ret;
+	else if (ret == 0) { /* Chunk fully written */
+		meta->state = NVM_CHK_ST_CLOSED;
+		meta->wp = geo->clba;
+		return 0;
+	} else if (ret > 0) {
+		switch (ret) {
+		case NVM_RSP_ERR_EMPTYPAGE:
+		case NVM_RSP_ERR_FAILCRC:
+		case NVM_RSP_ERR_FAILECC:
+		case NVM_RSP_WARN_HIGHECC:
+			meta->state = NVM_CHK_ST_OPEN;
+			break;
+		default:
+			return -ret; /* other io error */
+		}
+	}
+
+scan:
+	/*
+	 * chunk is open, we scan sequentially to update the write pointer.
+	 * We make the assumption that targets write data across all planes
+	 * before moving to the next page.
+	 */
+	for (pg = 0; pg < geo->num_pg; pg++) {
+		for (pl = 0; pl < geo->num_pln; pl++) {
+			ppa.g.pg = pg;
+			ppa.g.pl = pl;
+
+			ret = nvm_bb_chunk_sense(dev, ppa);
+			if (ret < 0) /* io error */
+				return ret;
+			else if (ret == 0) {
+				meta->wp += geo->ws_min;
+			} else if (ret > 0) {
+				switch (ret) {
+				case NVM_RSP_ERR_EMPTYPAGE:
+					return 0;
+				case NVM_RSP_ERR_FAILCRC:
+				case NVM_RSP_ERR_FAILECC:
+				case NVM_RSP_WARN_HIGHECC:
+					meta->wp += geo->ws_min;
+					break;
+				default:
+					return -ret; /* other io error */
+				}
+			}
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * folds a bad block list from its plane representation to its
+ * chunk representation.
+ *
+ * If any of the planes status are bad or grown bad, the chunk is marked
+ * offline. If not bad, the first plane state acts as the chunk state.
+ */
+static int nvm_bb_to_chunk(struct nvm_dev *dev, struct ppa_addr ppa,
+			   u8 *blks, int nr_blks, struct nvm_chk_meta *meta)
+{
+	struct nvm_geo *geo = &dev->geo;
+	int ret, blk, pl, offset, blktype;
 
 	for (blk = 0; blk < geo->num_chk; blk++) {
 		offset = blk * geo->pln_mode;
 		blktype = blks[offset];
 
-		/* Bad blocks on any planes take precedence over other types */
 		for (pl = 0; pl < geo->pln_mode; pl++) {
 			if (blks[offset + pl] &
 					(NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
@@ -834,23 +945,124 @@ int nvm_bb_tbl_fold(struct nvm_dev *dev, u8 *blks, int nr_blks)
 			}
 		}
 
-		blks[blk] = blktype;
+		ppa.g.blk = blk;
+
+		meta->wp = 0;
+		meta->type = NVM_CHK_TP_W_SEQ;
+		meta->wi = 0;
+		meta->slba = generic_to_dev_addr(dev, ppa).ppa;
+		meta->cnlb = dev->geo.clba;
+
+		if (blktype == NVM_BLK_T_FREE) {
+			ret = nvm_bb_chunk_scan(dev, ppa, meta);
+			if (ret)
+				return ret;
+		} else {
+			meta->state = NVM_CHK_ST_OFFLINE;
+		}
+
+		meta++;
 	}
 
-	return geo->num_chk;
+	return 0;
+}
+
+static int nvm_get_bb_meta(struct nvm_dev *dev, sector_t slba,
+			   int nchks, struct nvm_chk_meta *meta)
+{
+	struct nvm_geo *geo = &dev->geo;
+	struct ppa_addr ppa;
+	u8 *blks;
+	int ch, lun, nr_blks;
+	int ret;
+
+	ppa.ppa = slba;
+	ppa = dev_to_generic_addr(dev, ppa);
+
+	if (ppa.g.blk != 0)
+		return -EINVAL;
+
+	if ((nchks % geo->num_chk) != 0)
+		return -EINVAL;
+
+	nr_blks = geo->num_chk * geo->pln_mode;
+
+	blks = kmalloc(nr_blks, GFP_KERNEL);
+	if (!blks)
+		return -ENOMEM;
+
+	for (ch = ppa.g.ch; ch < geo->num_ch; ch++) {
+		for (lun = ppa.g.lun; lun < geo->num_lun; lun++) {
+			struct ppa_addr ppa_gen, ppa_dev;
+
+			if (!nchks)
+				goto done;
+
+			ppa_gen.ppa = 0;
+			ppa_gen.g.ch = ch;
+			ppa_gen.g.lun = lun;
+			ppa_dev = generic_to_dev_addr(dev, ppa_gen);
+
+			ret = dev->ops->get_bb_tbl(dev, ppa_dev, blks);
+			if (ret)
+				goto done;
+
+			ret = nvm_bb_to_chunk(dev, ppa_gen, blks, nr_blks,
+									meta);
+			if (ret)
+				goto done;
+
+			meta += geo->num_chk;
+			nchks -= geo->num_chk;
+		}
+	}
+done:
+	kfree(blks);
+	return ret;
 }
-EXPORT_SYMBOL(nvm_bb_tbl_fold);
 
-int nvm_get_tgt_bb_tbl(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa,
-		       u8 *blks)
+int nvm_get_chunk_meta(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa,
+		       int nchks, struct nvm_chk_meta *meta)
 {
 	struct nvm_dev *dev = tgt_dev->parent;
 
 	nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1);
 
-	return dev->ops->get_bb_tbl(dev, ppa, blks);
+	if (dev->geo.version == NVM_OCSSD_SPEC_12)
+		return nvm_get_bb_meta(dev, (sector_t)ppa.ppa, nchks, meta);
+
+	return dev->ops->get_chk_meta(dev, (sector_t)ppa.ppa, nchks, meta);
+}
+EXPORT_SYMBOL_GPL(nvm_get_chunk_meta);
+
+int nvm_set_chunk_meta(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
+		       int nr_ppas, int type)
+{
+	struct nvm_dev *dev = tgt_dev->parent;
+	struct nvm_rq rqd;
+	int ret;
+
+	if (dev->geo.version == NVM_OCSSD_SPEC_20)
+		return 0;
+
+	if (nr_ppas > NVM_MAX_VLBA) {
+		pr_err("nvm: unable to update all blocks atomically\n");
+		return -EINVAL;
+	}
+
+	memset(&rqd, 0, sizeof(struct nvm_rq));
+
+	nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas);
+	nvm_rq_tgt_to_dev(tgt_dev, &rqd);
+
+	ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
+	nvm_free_rqd_ppalist(tgt_dev, &rqd);
+	if (ret)
+		return -EINVAL;
+
+	return 0;
 }
-EXPORT_SYMBOL(nvm_get_tgt_bb_tbl);
+EXPORT_SYMBOL_GPL(nvm_set_chunk_meta);
 
 static int nvm_core_init(struct nvm_dev *dev)
 {

drivers/lightnvm/pblk-cache.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2016 CNEX Labs
  * Initial release: Javier Gonzalez <javier@cnexlabs.com>

drivers/lightnvm/pblk-core.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2016 CNEX Labs
  * Initial release: Javier Gonzalez <javier@cnexlabs.com>
@@ -16,7 +17,10 @@
  *
  */
 
+#define CREATE_TRACE_POINTS
+
 #include "pblk.h"
+#include "pblk-trace.h"
 
 static void pblk_line_mark_bb(struct work_struct *work)
 {
@@ -27,12 +31,12 @@ static void pblk_line_mark_bb(struct work_struct *work)
 	struct ppa_addr *ppa = line_ws->priv;
 	int ret;
 
-	ret = nvm_set_tgt_bb_tbl(dev, ppa, 1, NVM_BLK_T_GRWN_BAD);
+	ret = nvm_set_chunk_meta(dev, ppa, 1, NVM_BLK_T_GRWN_BAD);
 	if (ret) {
 		struct pblk_line *line;
 		int pos;
 
-		line = &pblk->lines[pblk_ppa_to_line(*ppa)];
+		line = pblk_ppa_to_line(pblk, *ppa);
 		pos = pblk_ppa_to_pos(&dev->geo, *ppa);
 
 		pblk_err(pblk, "failed to mark bb, line:%d, pos:%d\n",
@@ -80,19 +84,28 @@ static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
 	struct pblk_line *line;
 	int pos;
 
-	line = &pblk->lines[pblk_ppa_to_line(rqd->ppa_addr)];
+	line = pblk_ppa_to_line(pblk, rqd->ppa_addr);
 	pos = pblk_ppa_to_pos(geo, rqd->ppa_addr);
 	chunk = &line->chks[pos];
 
 	atomic_dec(&line->left_seblks);
 
 	if (rqd->error) {
+		trace_pblk_chunk_reset(pblk_disk_name(pblk),
+				&rqd->ppa_addr, PBLK_CHUNK_RESET_FAILED);
+
 		chunk->state = NVM_CHK_ST_OFFLINE;
 		pblk_mark_bb(pblk, line, rqd->ppa_addr);
 	} else {
+		trace_pblk_chunk_reset(pblk_disk_name(pblk),
+				&rqd->ppa_addr, PBLK_CHUNK_RESET_DONE);
+
 		chunk->state = NVM_CHK_ST_FREE;
 	}
 
+	trace_pblk_chunk_state(pblk_disk_name(pblk), &rqd->ppa_addr,
+				chunk->state);
+
 	atomic_dec(&pblk->inflight_io);
 }
 
@@ -108,9 +121,9 @@ static void pblk_end_io_erase(struct nvm_rq *rqd)
 /*
  * Get information for all chunks from the device.
  *
- * The caller is responsible for freeing the returned structure
+ * The caller is responsible for freeing (vmalloc) the returned structure
  */
-struct nvm_chk_meta *pblk_chunk_get_info(struct pblk *pblk)
+struct nvm_chk_meta *pblk_get_chunk_meta(struct pblk *pblk)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
 	struct nvm_geo *geo = &dev->geo;
@@ -122,11 +135,11 @@ struct nvm_chk_meta *pblk_chunk_get_info(struct pblk *pblk)
 	ppa.ppa = 0;
 
 	len = geo->all_chunks * sizeof(*meta);
-	meta = kzalloc(len, GFP_KERNEL);
+	meta = vzalloc(len);
 	if (!meta)
 		return ERR_PTR(-ENOMEM);
 
-	ret = nvm_get_chunk_meta(dev, meta, ppa, geo->all_chunks);
+	ret = nvm_get_chunk_meta(dev, ppa, geo->all_chunks, meta);
 	if (ret) {
 		kfree(meta);
 		return ERR_PTR(-EIO);
@@ -192,7 +205,6 @@ void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa)
 {
 	struct pblk_line *line;
 	u64 paddr;
-	int line_id;
 
 #ifdef CONFIG_NVM_PBLK_DEBUG
 	/* Callers must ensure that the ppa points to a device address */
@@ -200,8 +212,7 @@ void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa)
 	BUG_ON(pblk_ppa_empty(ppa));
 #endif
 
-	line_id = pblk_ppa_to_line(ppa);
-	line = &pblk->lines[line_id];
+	line = pblk_ppa_to_line(pblk, ppa);
 	paddr = pblk_dev_ppa_to_line_addr(pblk, ppa);
 
 	__pblk_map_invalidate(pblk, line, paddr);
@@ -227,6 +238,33 @@ static void pblk_invalidate_range(struct pblk *pblk, sector_t slba,
 	spin_unlock(&pblk->trans_lock);
 }
 
+int pblk_alloc_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd)
+{
+	struct nvm_tgt_dev *dev = pblk->dev;
+
+	rqd->meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
+							&rqd->dma_meta_list);
+	if (!rqd->meta_list)
+		return -ENOMEM;
+
+	if (rqd->nr_ppas == 1)
+		return 0;
+
+	rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size;
+	rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size;
+
+	return 0;
+}
+
+void pblk_free_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd)
+{
+	struct nvm_tgt_dev *dev = pblk->dev;
+
+	if (rqd->meta_list)
+		nvm_dev_dma_free(dev->parent, rqd->meta_list,
+				rqd->dma_meta_list);
+}
+
 /* Caller must guarantee that the request is a valid type */
 struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type)
 {
@@ -258,7 +296,6 @@ struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type)
 /* Typically used on completion path. Cannot guarantee request consistency */
 void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type)
 {
-	struct nvm_tgt_dev *dev = pblk->dev;
 	mempool_t *pool;
 
 	switch (type) {
@@ -279,9 +316,7 @@ void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type)
 		return;
 	}
 
-	if (rqd->meta_list)
-		nvm_dev_dma_free(dev->parent, rqd->meta_list,
-				rqd->dma_meta_list);
+	pblk_free_rqd_meta(pblk, rqd);
 	mempool_free(rqd, pool);
 }
 
@@ -409,6 +444,9 @@ struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line)
 		}
 	} else {
 		line->state = PBLK_LINESTATE_CORRUPT;
+		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
+
 		line->gc_group = PBLK_LINEGC_NONE;
 		move_list =  &l_mg->corrupt_list;
 		pblk_err(pblk, "corrupted vsc for line %d, vsc:%d (%d/%d/%d)\n",
@@ -479,9 +517,30 @@ int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd)
 	return nvm_submit_io(dev, rqd);
 }
 
+void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd)
+{
+	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
+
+	int i;
+
+	for (i = 0; i < rqd->nr_ppas; i++) {
+		struct ppa_addr *ppa = &ppa_list[i];
+		struct nvm_chk_meta *chunk = pblk_dev_ppa_to_chunk(pblk, *ppa);
+		u64 caddr = pblk_dev_ppa_to_chunk_addr(pblk, *ppa);
+
+		if (caddr == 0)
+			trace_pblk_chunk_state(pblk_disk_name(pblk),
+							ppa, NVM_CHK_ST_OPEN);
+		else if (caddr == chunk->cnlb)
+			trace_pblk_chunk_state(pblk_disk_name(pblk),
+							ppa, NVM_CHK_ST_CLOSED);
+	}
+}
+
 int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
+	int ret;
 
 	atomic_inc(&pblk->inflight_io);
 
@@ -490,7 +549,27 @@ int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd)
 		return NVM_IO_ERR;
 #endif
 
-	return nvm_submit_io_sync(dev, rqd);
+	ret = nvm_submit_io_sync(dev, rqd);
+
+	if (trace_pblk_chunk_state_enabled() && !ret &&
+	    rqd->opcode == NVM_OP_PWRITE)
+		pblk_check_chunk_state_update(pblk, rqd);
+
+	return ret;
+}
+
+int pblk_submit_io_sync_sem(struct pblk *pblk, struct nvm_rq *rqd)
+{
+	struct ppa_addr *ppa_list;
+	int ret;
+
+	ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
+
+	pblk_down_chunk(pblk, ppa_list[0]);
+	ret = pblk_submit_io_sync(pblk, rqd);
+	pblk_up_chunk(pblk, ppa_list[0]);
+
+	return ret;
 }
 
 static void pblk_bio_map_addr_endio(struct bio *bio)
@@ -621,262 +700,227 @@ u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line)
 	return paddr;
 }
 
-/*
- * Submit emeta to one LUN in the raid line at the time to avoid a deadlock when
- * taking the per LUN semaphore.
- */
-static int pblk_line_submit_emeta_io(struct pblk *pblk, struct pblk_line *line,
-				     void *emeta_buf, u64 paddr, int dir)
+u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
 	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
 	struct pblk_line_meta *lm = &pblk->lm;
-	void *ppa_list, *meta_list;
-	struct bio *bio;
-	struct nvm_rq rqd;
-	dma_addr_t dma_ppa_list, dma_meta_list;
-	int min = pblk->min_write_pgs;
-	int left_ppas = lm->emeta_sec[0];
-	int id = line->id;
-	int rq_ppas, rq_len;
-	int cmd_op, bio_op;
-	int i, j;
-	int ret;
+	int bit;
 
-	if (dir == PBLK_WRITE) {
-		bio_op = REQ_OP_WRITE;
-		cmd_op = NVM_OP_PWRITE;
-	} else if (dir == PBLK_READ) {
-		bio_op = REQ_OP_READ;
-		cmd_op = NVM_OP_PREAD;
-	} else
-		return -EINVAL;
+	/* This usually only happens on bad lines */
+	bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
+	if (bit >= lm->blk_per_line)
+		return -1;
 
-	meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
-							&dma_meta_list);
-	if (!meta_list)
-		return -ENOMEM;
+	return bit * geo->ws_opt;
+}
 
-	ppa_list = meta_list + pblk_dma_meta_size;
-	dma_ppa_list = dma_meta_list + pblk_dma_meta_size;
+int pblk_line_smeta_read(struct pblk *pblk, struct pblk_line *line)
+{
+	struct nvm_tgt_dev *dev = pblk->dev;
+	struct pblk_line_meta *lm = &pblk->lm;
+	struct bio *bio;
+	struct nvm_rq rqd;
+	u64 paddr = pblk_line_smeta_start(pblk, line);
+	int i, ret;
 
-next_rq:
 	memset(&rqd, 0, sizeof(struct nvm_rq));
 
-	rq_ppas = pblk_calc_secs(pblk, left_ppas, 0);
-	rq_len = rq_ppas * geo->csecs;
+	ret = pblk_alloc_rqd_meta(pblk, &rqd);
+	if (ret)
+		return ret;
 
-	bio = pblk_bio_map_addr(pblk, emeta_buf, rq_ppas, rq_len,
-					l_mg->emeta_alloc_type, GFP_KERNEL);
+	bio = bio_map_kern(dev->q, line->smeta, lm->smeta_len, GFP_KERNEL);
 	if (IS_ERR(bio)) {
 		ret = PTR_ERR(bio);
-		goto free_rqd_dma;
+		goto clear_rqd;
 	}
 
 	bio->bi_iter.bi_sector = 0; /* internal bio */
-	bio_set_op_attrs(bio, bio_op, 0);
+	bio_set_op_attrs(bio, REQ_OP_READ, 0);
 
 	rqd.bio = bio;
-	rqd.meta_list = meta_list;
-	rqd.ppa_list = ppa_list;
-	rqd.dma_meta_list = dma_meta_list;
-	rqd.dma_ppa_list = dma_ppa_list;
-	rqd.opcode = cmd_op;
-	rqd.nr_ppas = rq_ppas;
-
-	if (dir == PBLK_WRITE) {
-		struct pblk_sec_meta *meta_list = rqd.meta_list;
-
-		rqd.flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
-		for (i = 0; i < rqd.nr_ppas; ) {
-			spin_lock(&line->lock);
-			paddr = __pblk_alloc_page(pblk, line, min);
-			spin_unlock(&line->lock);
-			for (j = 0; j < min; j++, i++, paddr++) {
-				meta_list[i].lba = cpu_to_le64(ADDR_EMPTY);
-				rqd.ppa_list[i] =
-					addr_to_gen_ppa(pblk, paddr, id);
-			}
-		}
-	} else {
-		for (i = 0; i < rqd.nr_ppas; ) {
-			struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, id);
-			int pos = pblk_ppa_to_pos(geo, ppa);
-			int read_type = PBLK_READ_RANDOM;
-
-			if (pblk_io_aligned(pblk, rq_ppas))
-				read_type = PBLK_READ_SEQUENTIAL;
-			rqd.flags = pblk_set_read_mode(pblk, read_type);
-
-			while (test_bit(pos, line->blk_bitmap)) {
-				paddr += min;
-				if (pblk_boundary_paddr_checks(pblk, paddr)) {
-					pblk_err(pblk, "corrupt emeta line:%d\n",
-								line->id);
-					bio_put(bio);
-					ret = -EINTR;
-					goto free_rqd_dma;
-				}
-
-				ppa = addr_to_gen_ppa(pblk, paddr, id);
-				pos = pblk_ppa_to_pos(geo, ppa);
-			}
-
-			if (pblk_boundary_paddr_checks(pblk, paddr + min)) {
-				pblk_err(pblk, "corrupt emeta line:%d\n",
-								line->id);
-				bio_put(bio);
-				ret = -EINTR;
-				goto free_rqd_dma;
-			}
+	rqd.opcode = NVM_OP_PREAD;
+	rqd.nr_ppas = lm->smeta_sec;
+	rqd.is_seq = 1;
 
-			for (j = 0; j < min; j++, i++, paddr++)
-				rqd.ppa_list[i] =
-					addr_to_gen_ppa(pblk, paddr, line->id);
-		}
-	}
+	for (i = 0; i < lm->smeta_sec; i++, paddr++)
+		rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
 
 	ret = pblk_submit_io_sync(pblk, &rqd);
 	if (ret) {
-		pblk_err(pblk, "emeta I/O submission failed: %d\n", ret);
+		pblk_err(pblk, "smeta I/O submission failed: %d\n", ret);
 		bio_put(bio);
-		goto free_rqd_dma;
+		goto clear_rqd;
 	}
 
 	atomic_dec(&pblk->inflight_io);
 
-	if (rqd.error) {
-		if (dir == PBLK_WRITE)
-			pblk_log_write_err(pblk, &rqd);
-		else
-			pblk_log_read_err(pblk, &rqd);
-	}
+	if (rqd.error)
+		pblk_log_read_err(pblk, &rqd);
 
-	emeta_buf += rq_len;
-	left_ppas -= rq_ppas;
-	if (left_ppas)
-		goto next_rq;
-free_rqd_dma:
-	nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
+clear_rqd:
+	pblk_free_rqd_meta(pblk, &rqd);
 	return ret;
 }
 
-u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	int bit;
-
-	/* This usually only happens on bad lines */
-	bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
-	if (bit >= lm->blk_per_line)
-		return -1;
-
-	return bit * geo->ws_opt;
-}
-
-static int pblk_line_submit_smeta_io(struct pblk *pblk, struct pblk_line *line,
-				     u64 paddr, int dir)
+static int pblk_line_smeta_write(struct pblk *pblk, struct pblk_line *line,
+				 u64 paddr)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
 	struct pblk_line_meta *lm = &pblk->lm;
 	struct bio *bio;
 	struct nvm_rq rqd;
-	__le64 *lba_list = NULL;
+	__le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf);
+	__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
 	int i, ret;
-	int cmd_op, bio_op;
-	int flags;
-
-	if (dir == PBLK_WRITE) {
-		bio_op = REQ_OP_WRITE;
-		cmd_op = NVM_OP_PWRITE;
-		flags = pblk_set_progr_mode(pblk, PBLK_WRITE);
-		lba_list = emeta_to_lbas(pblk, line->emeta->buf);
-	} else if (dir == PBLK_READ_RECOV || dir == PBLK_READ) {
-		bio_op = REQ_OP_READ;
-		cmd_op = NVM_OP_PREAD;
-		flags = pblk_set_read_mode(pblk, PBLK_READ_SEQUENTIAL);
-	} else
-		return -EINVAL;
 
 	memset(&rqd, 0, sizeof(struct nvm_rq));
 
-	rqd.meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
-							&rqd.dma_meta_list);
-	if (!rqd.meta_list)
-		return -ENOMEM;
-
-	rqd.ppa_list = rqd.meta_list + pblk_dma_meta_size;
-	rqd.dma_ppa_list = rqd.dma_meta_list + pblk_dma_meta_size;
+	ret = pblk_alloc_rqd_meta(pblk, &rqd);
+	if (ret)
+		return ret;
 
 	bio = bio_map_kern(dev->q, line->smeta, lm->smeta_len, GFP_KERNEL);
 	if (IS_ERR(bio)) {
 		ret = PTR_ERR(bio);
-		goto free_ppa_list;
+		goto clear_rqd;
 	}
 
 	bio->bi_iter.bi_sector = 0; /* internal bio */
-	bio_set_op_attrs(bio, bio_op, 0);
+	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
 
 	rqd.bio = bio;
-	rqd.opcode = cmd_op;
-	rqd.flags = flags;
+	rqd.opcode = NVM_OP_PWRITE;
 	rqd.nr_ppas = lm->smeta_sec;
+	rqd.is_seq = 1;
 
 	for (i = 0; i < lm->smeta_sec; i++, paddr++) {
 		struct pblk_sec_meta *meta_list = rqd.meta_list;
 
 		rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
-
-		if (dir == PBLK_WRITE) {
-			__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
-
-			meta_list[i].lba = lba_list[paddr] = addr_empty;
-		}
+		meta_list[i].lba = lba_list[paddr] = addr_empty;
 	}
 
-	/*
-	 * This I/O is sent by the write thread when a line is replace. Since
-	 * the write thread is the only one sending write and erase commands,
-	 * there is no need to take the LUN semaphore.
-	 */
-	ret = pblk_submit_io_sync(pblk, &rqd);
+	ret = pblk_submit_io_sync_sem(pblk, &rqd);
 	if (ret) {
 		pblk_err(pblk, "smeta I/O submission failed: %d\n", ret);
 		bio_put(bio);
-		goto free_ppa_list;
+		goto clear_rqd;
 	}
 
 	atomic_dec(&pblk->inflight_io);
 
 	if (rqd.error) {
-		if (dir == PBLK_WRITE) {
-			pblk_log_write_err(pblk, &rqd);
-			ret = 1;
-		} else if (dir == PBLK_READ)
-			pblk_log_read_err(pblk, &rqd);
+		pblk_log_write_err(pblk, &rqd);
+		ret = -EIO;
 	}
 
-free_ppa_list:
-	nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
-
+clear_rqd:
+	pblk_free_rqd_meta(pblk, &rqd);
 	return ret;
 }
 
-int pblk_line_read_smeta(struct pblk *pblk, struct pblk_line *line)
+int pblk_line_emeta_read(struct pblk *pblk, struct pblk_line *line,
+			 void *emeta_buf)
 {
-	u64 bpaddr = pblk_line_smeta_start(pblk, line);
+	struct nvm_tgt_dev *dev = pblk->dev;
+	struct nvm_geo *geo = &dev->geo;
+	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+	struct pblk_line_meta *lm = &pblk->lm;
+	void *ppa_list, *meta_list;
+	struct bio *bio;
+	struct nvm_rq rqd;
+	u64 paddr = line->emeta_ssec;
+	dma_addr_t dma_ppa_list, dma_meta_list;
+	int min = pblk->min_write_pgs;
+	int left_ppas = lm->emeta_sec[0];
+	int line_id = line->id;
+	int rq_ppas, rq_len;
+	int i, j;
+	int ret;
 
-	return pblk_line_submit_smeta_io(pblk, line, bpaddr, PBLK_READ_RECOV);
-}
+	meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
+							&dma_meta_list);
+	if (!meta_list)
+		return -ENOMEM;
 
-int pblk_line_read_emeta(struct pblk *pblk, struct pblk_line *line,
-			 void *emeta_buf)
-{
-	return pblk_line_submit_emeta_io(pblk, line, emeta_buf,
-						line->emeta_ssec, PBLK_READ);
+	ppa_list = meta_list + pblk_dma_meta_size;
+	dma_ppa_list = dma_meta_list + pblk_dma_meta_size;
+
+next_rq:
+	memset(&rqd, 0, sizeof(struct nvm_rq));
+
+	rq_ppas = pblk_calc_secs(pblk, left_ppas, 0);
+	rq_len = rq_ppas * geo->csecs;
+
+	bio = pblk_bio_map_addr(pblk, emeta_buf, rq_ppas, rq_len,
+					l_mg->emeta_alloc_type, GFP_KERNEL);
+	if (IS_ERR(bio)) {
+		ret = PTR_ERR(bio);
+		goto free_rqd_dma;
+	}
+
+	bio->bi_iter.bi_sector = 0; /* internal bio */
+	bio_set_op_attrs(bio, REQ_OP_READ, 0);
+
+	rqd.bio = bio;
+	rqd.meta_list = meta_list;
+	rqd.ppa_list = ppa_list;
+	rqd.dma_meta_list = dma_meta_list;
+	rqd.dma_ppa_list = dma_ppa_list;
+	rqd.opcode = NVM_OP_PREAD;
+	rqd.nr_ppas = rq_ppas;
+
+	for (i = 0; i < rqd.nr_ppas; ) {
+		struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, line_id);
+		int pos = pblk_ppa_to_pos(geo, ppa);
+
+		if (pblk_io_aligned(pblk, rq_ppas))
+			rqd.is_seq = 1;
+
+		while (test_bit(pos, line->blk_bitmap)) {
+			paddr += min;
+			if (pblk_boundary_paddr_checks(pblk, paddr)) {
+				bio_put(bio);
+				ret = -EINTR;
+				goto free_rqd_dma;
+			}
+
+			ppa = addr_to_gen_ppa(pblk, paddr, line_id);
+			pos = pblk_ppa_to_pos(geo, ppa);
+		}
+
+		if (pblk_boundary_paddr_checks(pblk, paddr + min)) {
+			bio_put(bio);
+			ret = -EINTR;
+			goto free_rqd_dma;
+		}
+
+		for (j = 0; j < min; j++, i++, paddr++)
+			rqd.ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line_id);
+	}
+
+	ret = pblk_submit_io_sync(pblk, &rqd);
+	if (ret) {
+		pblk_err(pblk, "emeta I/O submission failed: %d\n", ret);
+		bio_put(bio);
+		goto free_rqd_dma;
+	}
+
+	atomic_dec(&pblk->inflight_io);
+
+	if (rqd.error)
+		pblk_log_read_err(pblk, &rqd);
+
+	emeta_buf += rq_len;
+	left_ppas -= rq_ppas;
+	if (left_ppas)
+		goto next_rq;
+
+free_rqd_dma:
+	nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
+	return ret;
 }
 
 static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd,
@@ -885,16 +929,17 @@ static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd,
 	rqd->opcode = NVM_OP_ERASE;
 	rqd->ppa_addr = ppa;
 	rqd->nr_ppas = 1;
-	rqd->flags = pblk_set_progr_mode(pblk, PBLK_ERASE);
+	rqd->is_seq = 1;
 	rqd->bio = NULL;
 }
 
 static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa)
 {
-	struct nvm_rq rqd;
-	int ret = 0;
+	struct nvm_rq rqd = {NULL};
+	int ret;
 
-	memset(&rqd, 0, sizeof(struct nvm_rq));
+	trace_pblk_chunk_reset(pblk_disk_name(pblk), &ppa,
+				PBLK_CHUNK_RESET_START);
 
 	pblk_setup_e_rq(pblk, &rqd, ppa);
 
@@ -902,19 +947,6 @@ static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa)
 	 * with writes. Thus, there is no need to take the LUN semaphore.
 	 */
 	ret = pblk_submit_io_sync(pblk, &rqd);
-	if (ret) {
-		struct nvm_tgt_dev *dev = pblk->dev;
-		struct nvm_geo *geo = &dev->geo;
-
-		pblk_err(pblk, "could not sync erase line:%d,blk:%d\n",
-					pblk_ppa_to_line(ppa),
-					pblk_ppa_to_pos(geo, ppa));
-
-		rqd.error = ret;
-		goto out;
-	}
-
-out:
 	rqd.private = pblk;
 	__pblk_end_io_erase(pblk, &rqd);
 
@@ -1008,6 +1040,8 @@ static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line,
 		spin_lock(&l_mg->free_lock);
 		spin_lock(&line->lock);
 		line->state = PBLK_LINESTATE_BAD;
+		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
 		spin_unlock(&line->lock);
 
 		list_add_tail(&line->list, &l_mg->bad_list);
@@ -1071,15 +1105,18 @@ static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line,
 static int pblk_line_alloc_bitmaps(struct pblk *pblk, struct pblk_line *line)
 {
 	struct pblk_line_meta *lm = &pblk->lm;
+	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
 
-	line->map_bitmap = kzalloc(lm->sec_bitmap_len, GFP_KERNEL);
+	line->map_bitmap = mempool_alloc(l_mg->bitmap_pool, GFP_KERNEL);
 	if (!line->map_bitmap)
 		return -ENOMEM;
 
+	memset(line->map_bitmap, 0, lm->sec_bitmap_len);
+
 	/* will be initialized using bb info from map_bitmap */
-	line->invalid_bitmap = kmalloc(lm->sec_bitmap_len, GFP_KERNEL);
+	line->invalid_bitmap = mempool_alloc(l_mg->bitmap_pool, GFP_KERNEL);
 	if (!line->invalid_bitmap) {
-		kfree(line->map_bitmap);
+		mempool_free(line->map_bitmap, l_mg->bitmap_pool);
 		line->map_bitmap = NULL;
 		return -ENOMEM;
 	}
@@ -1122,7 +1159,7 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
 	line->smeta_ssec = off;
 	line->cur_sec = off + lm->smeta_sec;
 
-	if (init && pblk_line_submit_smeta_io(pblk, line, off, PBLK_WRITE)) {
+	if (init && pblk_line_smeta_write(pblk, line, off)) {
 		pblk_debug(pblk, "line smeta I/O failed. Retry\n");
 		return 0;
 	}
@@ -1152,6 +1189,8 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
 		bitmap_weight(line->invalid_bitmap, lm->sec_per_line)) {
 		spin_lock(&line->lock);
 		line->state = PBLK_LINESTATE_BAD;
+		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
 		spin_unlock(&line->lock);
 
 		list_add_tail(&line->list, &l_mg->bad_list);
@@ -1204,6 +1243,8 @@ static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
 	if (line->state == PBLK_LINESTATE_NEW) {
 		blk_to_erase = pblk_prepare_new_line(pblk, line);
 		line->state = PBLK_LINESTATE_FREE;
+		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
 	} else {
 		blk_to_erase = blk_in_line;
 	}
@@ -1221,6 +1262,8 @@ static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
 	}
 
 	line->state = PBLK_LINESTATE_OPEN;
+	trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+				line->state);
 
 	atomic_set(&line->left_eblks, blk_to_erase);
 	atomic_set(&line->left_seblks, blk_to_erase);
@@ -1265,7 +1308,9 @@ int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line)
 
 void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line)
 {
-	kfree(line->map_bitmap);
+	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+
+	mempool_free(line->map_bitmap, l_mg->bitmap_pool);
 	line->map_bitmap = NULL;
 	line->smeta = NULL;
 	line->emeta = NULL;
@@ -1283,8 +1328,11 @@ static void pblk_line_reinit(struct pblk_line *line)
 
 void pblk_line_free(struct pblk_line *line)
 {
-	kfree(line->map_bitmap);
-	kfree(line->invalid_bitmap);
+	struct pblk *pblk = line->pblk;
+	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+
+	mempool_free(line->map_bitmap, l_mg->bitmap_pool);
+	mempool_free(line->invalid_bitmap, l_mg->bitmap_pool);
 
 	pblk_line_reinit(line);
 }
@@ -1312,6 +1360,8 @@ retry:
 	if (unlikely(bit >= lm->blk_per_line)) {
 		spin_lock(&line->lock);
 		line->state = PBLK_LINESTATE_BAD;
+		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
 		spin_unlock(&line->lock);
 
 		list_add_tail(&line->list, &l_mg->bad_list);
@@ -1446,12 +1496,32 @@ retry_setup:
 	return line;
 }
 
+void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa)
+{
+	struct pblk_line *line;
+
+	line = pblk_ppa_to_line(pblk, ppa);
+	kref_put(&line->ref, pblk_line_put_wq);
+}
+
+void pblk_rq_to_line_put(struct pblk *pblk, struct nvm_rq *rqd)
+{
+	struct ppa_addr *ppa_list;
+	int i;
+
+	ppa_list = (rqd->nr_ppas > 1) ? rqd->ppa_list : &rqd->ppa_addr;
+
+	for (i = 0; i < rqd->nr_ppas; i++)
+		pblk_ppa_to_line_put(pblk, ppa_list[i]);
+}
+
 static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line)
 {
 	lockdep_assert_held(&pblk->l_mg.free_lock);
 
 	pblk_set_space_limit(pblk);
 	pblk->state = PBLK_STATE_STOPPING;
+	trace_pblk_state(pblk_disk_name(pblk), pblk->state);
 }
 
 static void pblk_line_close_meta_sync(struct pblk *pblk)
@@ -1501,6 +1571,7 @@ void __pblk_pipeline_flush(struct pblk *pblk)
 		return;
 	}
 	pblk->state = PBLK_STATE_RECOVERING;
+	trace_pblk_state(pblk_disk_name(pblk), pblk->state);
 	spin_unlock(&l_mg->free_lock);
 
 	pblk_flush_writer(pblk);
@@ -1522,6 +1593,7 @@ void __pblk_pipeline_stop(struct pblk *pblk)
 
 	spin_lock(&l_mg->free_lock);
 	pblk->state = PBLK_STATE_STOPPED;
+	trace_pblk_state(pblk_disk_name(pblk), pblk->state);
 	l_mg->data_line = NULL;
 	l_mg->data_next = NULL;
 	spin_unlock(&l_mg->free_lock);
@@ -1539,13 +1611,14 @@ struct pblk_line *pblk_line_replace_data(struct pblk *pblk)
 	struct pblk_line *cur, *new = NULL;
 	unsigned int left_seblks;
 
-	cur = l_mg->data_line;
 	new = l_mg->data_next;
 	if (!new)
 		goto out;
-	l_mg->data_line = new;
 
 	spin_lock(&l_mg->free_lock);
+	cur = l_mg->data_line;
+	l_mg->data_line = new;
+
 	pblk_line_setup_metadata(new, l_mg, &pblk->lm);
 	spin_unlock(&l_mg->free_lock);
 
@@ -1612,6 +1685,8 @@ static void __pblk_line_put(struct pblk *pblk, struct pblk_line *line)
 	spin_lock(&line->lock);
 	WARN_ON(line->state != PBLK_LINESTATE_GC);
 	line->state = PBLK_LINESTATE_FREE;
+	trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
 	line->gc_group = PBLK_LINEGC_NONE;
 	pblk_line_free(line);
 
@@ -1680,6 +1755,9 @@ int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa)
 	rqd->end_io = pblk_end_io_erase;
 	rqd->private = pblk;
 
+	trace_pblk_chunk_reset(pblk_disk_name(pblk),
+				&ppa, PBLK_CHUNK_RESET_START);
+
 	/* The write thread schedules erases so that it minimizes disturbances
 	 * with writes. Thus, there is no need to take the LUN semaphore.
 	 */
@@ -1689,7 +1767,7 @@ int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa)
 		struct nvm_geo *geo = &dev->geo;
 
 		pblk_err(pblk, "could not async erase line:%d,blk:%d\n",
-					pblk_ppa_to_line(ppa),
+					pblk_ppa_to_line_id(ppa),
 					pblk_ppa_to_pos(geo, ppa));
 	}
 
@@ -1741,10 +1819,9 @@ void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
 	WARN_ON(line->state != PBLK_LINESTATE_OPEN);
 	line->state = PBLK_LINESTATE_CLOSED;
 	move_list = pblk_line_gc_list(pblk, line);
-
 	list_add_tail(&line->list, move_list);
 
-	kfree(line->map_bitmap);
+	mempool_free(line->map_bitmap, l_mg->bitmap_pool);
 	line->map_bitmap = NULL;
 	line->smeta = NULL;
 	line->emeta = NULL;
@@ -1760,6 +1837,9 @@ void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
 
 	spin_unlock(&line->lock);
 	spin_unlock(&l_mg->gc_lock);
+
+	trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
 }
 
 void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
@@ -1778,6 +1858,17 @@ void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
 	wa->pad = cpu_to_le64(atomic64_read(&pblk->pad_wa));
 	wa->gc = cpu_to_le64(atomic64_read(&pblk->gc_wa));
 
+	if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) {
+		emeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC);
+		memcpy(emeta_buf->header.uuid, pblk->instance_uuid, 16);
+		emeta_buf->header.id = cpu_to_le32(line->id);
+		emeta_buf->header.type = cpu_to_le16(line->type);
+		emeta_buf->header.version_major = EMETA_VERSION_MAJOR;
+		emeta_buf->header.version_minor = EMETA_VERSION_MINOR;
+		emeta_buf->header.crc = cpu_to_le32(
+			pblk_calc_meta_header_crc(pblk, &emeta_buf->header));
+	}
+
 	emeta_buf->nr_valid_lbas = cpu_to_le64(line->nr_valid_lbas);
 	emeta_buf->crc = cpu_to_le32(pblk_calc_emeta_crc(pblk, emeta_buf));
 
@@ -1795,8 +1886,6 @@ void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
 	spin_unlock(&l_mg->close_lock);
 
 	pblk_line_should_sync_meta(pblk);
-
-
 }
 
 static void pblk_save_lba_list(struct pblk *pblk, struct pblk_line *line)
@@ -1847,8 +1936,7 @@ void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
 	queue_work(wq, &line_ws->ws);
 }
 
-static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list,
-			     int nr_ppas, int pos)
+static void __pblk_down_chunk(struct pblk *pblk, int pos)
 {
 	struct pblk_lun *rlun = &pblk->luns[pos];
 	int ret;
@@ -1857,13 +1945,6 @@ static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list,
 	 * Only send one inflight I/O per LUN. Since we map at a page
 	 * granurality, all ppas in the I/O will map to the same LUN
 	 */
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	int i;
-
-	for (i = 1; i < nr_ppas; i++)
-		WARN_ON(ppa_list[0].a.lun != ppa_list[i].a.lun ||
-				ppa_list[0].a.ch != ppa_list[i].a.ch);
-#endif
 
 	ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000));
 	if (ret == -ETIME || ret == -EINTR)
@@ -1871,21 +1952,21 @@ static void __pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list,
 				-ret);
 }
 
-void pblk_down_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas)
+void pblk_down_chunk(struct pblk *pblk, struct ppa_addr ppa)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
 	struct nvm_geo *geo = &dev->geo;
-	int pos = pblk_ppa_to_pos(geo, ppa_list[0]);
+	int pos = pblk_ppa_to_pos(geo, ppa);
 
-	__pblk_down_page(pblk, ppa_list, nr_ppas, pos);
+	__pblk_down_chunk(pblk, pos);
 }
 
-void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
+void pblk_down_rq(struct pblk *pblk, struct ppa_addr ppa,
 		  unsigned long *lun_bitmap)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
 	struct nvm_geo *geo = &dev->geo;
-	int pos = pblk_ppa_to_pos(geo, ppa_list[0]);
+	int pos = pblk_ppa_to_pos(geo, ppa);
 
 	/* If the LUN has been locked for this same request, do no attempt to
 	 * lock it again
@@ -1893,30 +1974,21 @@ void pblk_down_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
 	if (test_and_set_bit(pos, lun_bitmap))
 		return;
 
-	__pblk_down_page(pblk, ppa_list, nr_ppas, pos);
+	__pblk_down_chunk(pblk, pos);
 }
 
-void pblk_up_page(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas)
+void pblk_up_chunk(struct pblk *pblk, struct ppa_addr ppa)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
 	struct nvm_geo *geo = &dev->geo;
 	struct pblk_lun *rlun;
-	int pos = pblk_ppa_to_pos(geo, ppa_list[0]);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	int i;
-
-	for (i = 1; i < nr_ppas; i++)
-		WARN_ON(ppa_list[0].a.lun != ppa_list[i].a.lun ||
-				ppa_list[0].a.ch != ppa_list[i].a.ch);
-#endif
+	int pos = pblk_ppa_to_pos(geo, ppa);
 
 	rlun = &pblk->luns[pos];
 	up(&rlun->wr_sem);
 }
 
-void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,
-		unsigned long *lun_bitmap)
+void pblk_up_rq(struct pblk *pblk, unsigned long *lun_bitmap)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
 	struct nvm_geo *geo = &dev->geo;
@@ -2060,8 +2132,7 @@ void pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
 
 		/* If the L2P entry maps to a line, the reference is valid */
 		if (!pblk_ppa_empty(ppa) && !pblk_addr_in_cache(ppa)) {
-			int line_id = pblk_ppa_to_line(ppa);
-			struct pblk_line *line = &pblk->lines[line_id];
+			struct pblk_line *line = pblk_ppa_to_line(pblk, ppa);
 
 			kref_get(&line->ref);
 		}

drivers/lightnvm/pblk-gc.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2016 CNEX Labs
  * Initial release: Javier Gonzalez <javier@cnexlabs.com>
@@ -16,8 +17,10 @@
  */
 
 #include "pblk.h"
+#include "pblk-trace.h"
 #include <linux/delay.h>
 
+
 static void pblk_gc_free_gc_rq(struct pblk_gc_rq *gc_rq)
 {
 	if (gc_rq->data)
@@ -64,6 +67,8 @@ static void pblk_put_line_back(struct pblk *pblk, struct pblk_line *line)
 	spin_lock(&line->lock);
 	WARN_ON(line->state != PBLK_LINESTATE_GC);
 	line->state = PBLK_LINESTATE_CLOSED;
+	trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
 	move_list = pblk_line_gc_list(pblk, line);
 	spin_unlock(&line->lock);
 
@@ -144,7 +149,7 @@ static __le64 *get_lba_list_from_emeta(struct pblk *pblk,
 	if (!emeta_buf)
 		return NULL;
 
-	ret = pblk_line_read_emeta(pblk, line, emeta_buf);
+	ret = pblk_line_emeta_read(pblk, line, emeta_buf);
 	if (ret) {
 		pblk_err(pblk, "line %d read emeta failed (%d)\n",
 				line->id, ret);
@@ -405,6 +410,8 @@ void pblk_gc_free_full_lines(struct pblk *pblk)
 		spin_lock(&line->lock);
 		WARN_ON(line->state != PBLK_LINESTATE_CLOSED);
 		line->state = PBLK_LINESTATE_GC;
+		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
 		spin_unlock(&line->lock);
 
 		list_del(&line->list);
@@ -451,6 +458,8 @@ next_gc_group:
 		spin_lock(&line->lock);
 		WARN_ON(line->state != PBLK_LINESTATE_CLOSED);
 		line->state = PBLK_LINESTATE_GC;
+		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+					line->state);
 		spin_unlock(&line->lock);
 
 		list_del(&line->list);

drivers/lightnvm/pblk-init.c

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2015 IT University of Copenhagen (rrpc.c)
  * Copyright (C) 2016 CNEX Labs
@@ -19,15 +20,31 @@
  */
 
 #include "pblk.h"
+#include "pblk-trace.h"
 
 static unsigned int write_buffer_size;
 
 module_param(write_buffer_size, uint, 0644);
 MODULE_PARM_DESC(write_buffer_size, "number of entries in a write buffer");
 
-static struct kmem_cache *pblk_ws_cache, *pblk_rec_cache, *pblk_g_rq_cache,
-				*pblk_w_rq_cache;
-static DECLARE_RWSEM(pblk_lock);
+struct pblk_global_caches {
+	struct kmem_cache	*ws;
+	struct kmem_cache	*rec;
+	struct kmem_cache	*g_rq;
+	struct kmem_cache	*w_rq;
+
+	struct kref		kref;
+
+	struct mutex		mutex; /* Ensures consistency between
+					* caches and kref
+					*/
+};
+
+static struct pblk_global_caches pblk_caches = {
+	.mutex = __MUTEX_INITIALIZER(pblk_caches.mutex),
+	.kref = KREF_INIT(0),
+};
+
 struct bio_set pblk_bio_set;
 
 static int pblk_rw_io(struct request_queue *q, struct pblk *pblk,
@@ -168,36 +185,26 @@ static void pblk_rwb_free(struct pblk *pblk)
 	if (pblk_rb_tear_down_check(&pblk->rwb))
 		pblk_err(pblk, "write buffer error on tear down\n");
 
-	pblk_rb_data_free(&pblk->rwb);
-	vfree(pblk_rb_entries_ref(&pblk->rwb));
+	pblk_rb_free(&pblk->rwb);
 }
 
 static int pblk_rwb_init(struct pblk *pblk)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
 	struct nvm_geo *geo = &dev->geo;
-	struct pblk_rb_entry *entries;
-	unsigned long nr_entries, buffer_size;
-	unsigned int power_size, power_seg_sz;
-	int pgs_in_buffer;
+	unsigned long buffer_size;
+	int pgs_in_buffer, threshold;
 
-	pgs_in_buffer = max(geo->mw_cunits, geo->ws_opt) * geo->all_luns;
+	threshold = geo->mw_cunits * geo->all_luns;
+	pgs_in_buffer = (max(geo->mw_cunits, geo->ws_opt) + geo->ws_opt)
+								* geo->all_luns;
 
 	if (write_buffer_size && (write_buffer_size > pgs_in_buffer))
 		buffer_size = write_buffer_size;
 	else
 		buffer_size = pgs_in_buffer;
 
-	nr_entries = pblk_rb_calculate_size(buffer_size);
-
-	entries = vzalloc(array_size(nr_entries, sizeof(struct pblk_rb_entry)));
-	if (!entries)
-		return -ENOMEM;
-
-	power_size = get_count_order(nr_entries);
-	power_seg_sz = get_count_order(geo->csecs);
-
-	return pblk_rb_init(&pblk->rwb, entries, power_size, power_seg_sz);
+	return pblk_rb_init(&pblk->rwb, buffer_size, threshold, geo->csecs);
 }
 
 /* Minimum pages needed within a lun */
@@ -306,53 +313,80 @@ static int pblk_set_addrf(struct pblk *pblk)
 	return 0;
 }
 
-static int pblk_init_global_caches(struct pblk *pblk)
+static int pblk_create_global_caches(void)
 {
-	down_write(&pblk_lock);
-	pblk_ws_cache = kmem_cache_create("pblk_blk_ws",
+
+	pblk_caches.ws = kmem_cache_create("pblk_blk_ws",
 				sizeof(struct pblk_line_ws), 0, 0, NULL);
-	if (!pblk_ws_cache) {
-		up_write(&pblk_lock);
+	if (!pblk_caches.ws)
 		return -ENOMEM;
-	}
 
-	pblk_rec_cache = kmem_cache_create("pblk_rec",
+	pblk_caches.rec = kmem_cache_create("pblk_rec",
 				sizeof(struct pblk_rec_ctx), 0, 0, NULL);
-	if (!pblk_rec_cache) {
-		kmem_cache_destroy(pblk_ws_cache);
-		up_write(&pblk_lock);
-		return -ENOMEM;
-	}
+	if (!pblk_caches.rec)
+		goto fail_destroy_ws;
 
-	pblk_g_rq_cache = kmem_cache_create("pblk_g_rq", pblk_g_rq_size,
+	pblk_caches.g_rq = kmem_cache_create("pblk_g_rq", pblk_g_rq_size,
 				0, 0, NULL);
-	if (!pblk_g_rq_cache) {
-		kmem_cache_destroy(pblk_ws_cache);
-		kmem_cache_destroy(pblk_rec_cache);
-		up_write(&pblk_lock);
-		return -ENOMEM;
-	}
+	if (!pblk_caches.g_rq)
+		goto fail_destroy_rec;
 
-	pblk_w_rq_cache = kmem_cache_create("pblk_w_rq", pblk_w_rq_size,
+	pblk_caches.w_rq = kmem_cache_create("pblk_w_rq", pblk_w_rq_size,
 				0, 0, NULL);
-	if (!pblk_w_rq_cache) {
-		kmem_cache_destroy(pblk_ws_cache);
-		kmem_cache_destroy(pblk_rec_cache);
-		kmem_cache_destroy(pblk_g_rq_cache);
-		up_write(&pblk_lock);
-		return -ENOMEM;
-	}
-	up_write(&pblk_lock);
+	if (!pblk_caches.w_rq)
+		goto fail_destroy_g_rq;
 
 	return 0;
+
+fail_destroy_g_rq:
+	kmem_cache_destroy(pblk_caches.g_rq);
+fail_destroy_rec:
+	kmem_cache_destroy(pblk_caches.rec);
+fail_destroy_ws:
+	kmem_cache_destroy(pblk_caches.ws);
+
+	return -ENOMEM;
 }
 
-static void pblk_free_global_caches(struct pblk *pblk)
+static int pblk_get_global_caches(void)
 {
-	kmem_cache_destroy(pblk_ws_cache);
-	kmem_cache_destroy(pblk_rec_cache);
-	kmem_cache_destroy(pblk_g_rq_cache);
-	kmem_cache_destroy(pblk_w_rq_cache);
+	int ret;
+
+	mutex_lock(&pblk_caches.mutex);
+
+	if (kref_read(&pblk_caches.kref) > 0) {
+		kref_get(&pblk_caches.kref);
+		mutex_unlock(&pblk_caches.mutex);
+		return 0;
+	}
+
+	ret = pblk_create_global_caches();
+
+	if (!ret)
+		kref_get(&pblk_caches.kref);
+
+	mutex_unlock(&pblk_caches.mutex);
+
+	return ret;
+}
+
+static void pblk_destroy_global_caches(struct kref *ref)
+{
+	struct pblk_global_caches *c;
+
+	c = container_of(ref, struct pblk_global_caches, kref);
+
+	kmem_cache_destroy(c->ws);
+	kmem_cache_destroy(c->rec);
+	kmem_cache_destroy(c->g_rq);
+	kmem_cache_destroy(c->w_rq);
+}
+
+static void pblk_put_global_caches(void)
+{
+	mutex_lock(&pblk_caches.mutex);
+	kref_put(&pblk_caches.kref, pblk_destroy_global_caches);
+	mutex_unlock(&pblk_caches.mutex);
 }
 
 static int pblk_core_init(struct pblk *pblk)
@@ -371,23 +405,19 @@ static int pblk_core_init(struct pblk *pblk)
 	atomic64_set(&pblk->nr_flush, 0);
 	pblk->nr_flush_rst = 0;
 
-	pblk->min_write_pgs = geo->ws_opt * (geo->csecs / PAGE_SIZE);
+	pblk->min_write_pgs = geo->ws_opt;
 	max_write_ppas = pblk->min_write_pgs * geo->all_luns;
 	pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA);
+	pblk->max_write_pgs = min_t(int, pblk->max_write_pgs,
+		queue_max_hw_sectors(dev->q) / (geo->csecs >> SECTOR_SHIFT));
 	pblk_set_sec_per_write(pblk, pblk->min_write_pgs);
 
-	if (pblk->max_write_pgs > PBLK_MAX_REQ_ADDRS) {
-		pblk_err(pblk, "vector list too big(%u > %u)\n",
-				pblk->max_write_pgs, PBLK_MAX_REQ_ADDRS);
-		return -EINVAL;
-	}
-
 	pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1, sizeof(atomic64_t),
 								GFP_KERNEL);
 	if (!pblk->pad_dist)
 		return -ENOMEM;
 
-	if (pblk_init_global_caches(pblk))
+	if (pblk_get_global_caches())
 		goto fail_free_pad_dist;
 
 	/* Internal bios can be at most the sectors signaled by the device. */
@@ -396,27 +426,27 @@ static int pblk_core_init(struct pblk *pblk)
 		goto free_global_caches;
 
 	ret = mempool_init_slab_pool(&pblk->gen_ws_pool, PBLK_GEN_WS_POOL_SIZE,
-				     pblk_ws_cache);
+				     pblk_caches.ws);
 	if (ret)
 		goto free_page_bio_pool;
 
 	ret = mempool_init_slab_pool(&pblk->rec_pool, geo->all_luns,
-				     pblk_rec_cache);
+				     pblk_caches.rec);
 	if (ret)
 		goto free_gen_ws_pool;
 
 	ret = mempool_init_slab_pool(&pblk->r_rq_pool, geo->all_luns,
-				     pblk_g_rq_cache);
+				     pblk_caches.g_rq);
 	if (ret)
 		goto free_rec_pool;
 
 	ret = mempool_init_slab_pool(&pblk->e_rq_pool, geo->all_luns,
-				     pblk_g_rq_cache);
+				     pblk_caches.g_rq);
 	if (ret)
 		goto free_r_rq_pool;
 
 	ret = mempool_init_slab_pool(&pblk->w_rq_pool, geo->all_luns,
-				     pblk_w_rq_cache);
+				     pblk_caches.w_rq);
 	if (ret)
 		goto free_e_rq_pool;
 
@@ -462,7 +492,7 @@ free_gen_ws_pool:
 free_page_bio_pool:
 	mempool_exit(&pblk->page_bio_pool);
 free_global_caches:
-	pblk_free_global_caches(pblk);
+	pblk_put_global_caches();
 fail_free_pad_dist:
 	kfree(pblk->pad_dist);
 	return -ENOMEM;
@@ -486,7 +516,7 @@ static void pblk_core_free(struct pblk *pblk)
 	mempool_exit(&pblk->e_rq_pool);
 	mempool_exit(&pblk->w_rq_pool);
 
-	pblk_free_global_caches(pblk);
+	pblk_put_global_caches();
 	kfree(pblk->pad_dist);
 }
 
@@ -504,6 +534,9 @@ static void pblk_line_mg_free(struct pblk *pblk)
 		pblk_mfree(l_mg->eline_meta[i]->buf, l_mg->emeta_alloc_type);
 		kfree(l_mg->eline_meta[i]);
 	}
+
+	mempool_destroy(l_mg->bitmap_pool);
+	kmem_cache_destroy(l_mg->bitmap_cache);
 }
 
 static void pblk_line_meta_free(struct pblk_line_mgmt *l_mg,
@@ -540,67 +573,6 @@ static void pblk_lines_free(struct pblk *pblk)
 	kfree(pblk->lines);
 }
 
-static int pblk_bb_get_tbl(struct nvm_tgt_dev *dev, struct pblk_lun *rlun,
-			   u8 *blks, int nr_blks)
-{
-	struct ppa_addr ppa;
-	int ret;
-
-	ppa.ppa = 0;
-	ppa.g.ch = rlun->bppa.g.ch;
-	ppa.g.lun = rlun->bppa.g.lun;
-
-	ret = nvm_get_tgt_bb_tbl(dev, ppa, blks);
-	if (ret)
-		return ret;
-
-	nr_blks = nvm_bb_tbl_fold(dev->parent, blks, nr_blks);
-	if (nr_blks < 0)
-		return -EIO;
-
-	return 0;
-}
-
-static void *pblk_bb_get_meta(struct pblk *pblk)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	u8 *meta;
-	int i, nr_blks, blk_per_lun;
-	int ret;
-
-	blk_per_lun = geo->num_chk * geo->pln_mode;
-	nr_blks = blk_per_lun * geo->all_luns;
-
-	meta = kmalloc(nr_blks, GFP_KERNEL);
-	if (!meta)
-		return ERR_PTR(-ENOMEM);
-
-	for (i = 0; i < geo->all_luns; i++) {
-		struct pblk_lun *rlun = &pblk->luns[i];
-		u8 *meta_pos = meta + i * blk_per_lun;
-
-		ret = pblk_bb_get_tbl(dev, rlun, meta_pos, blk_per_lun);
-		if (ret) {
-			kfree(meta);
-			return ERR_PTR(-EIO);
-		}
-	}
-
-	return meta;
-}
-
-static void *pblk_chunk_get_meta(struct pblk *pblk)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-
-	if (geo->version == NVM_OCSSD_SPEC_12)
-		return pblk_bb_get_meta(pblk);
-	else
-		return pblk_chunk_get_info(pblk);
-}
-
 static int pblk_luns_init(struct pblk *pblk)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
@@ -699,51 +671,7 @@ static void pblk_set_provision(struct pblk *pblk, long nr_free_blks)
 	atomic_set(&pblk->rl.free_user_blocks, nr_free_blks);
 }
 
-static int pblk_setup_line_meta_12(struct pblk *pblk, struct pblk_line *line,
-				   void *chunk_meta)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	int i, chk_per_lun, nr_bad_chks = 0;
-
-	chk_per_lun = geo->num_chk * geo->pln_mode;
-
-	for (i = 0; i < lm->blk_per_line; i++) {
-		struct pblk_lun *rlun = &pblk->luns[i];
-		struct nvm_chk_meta *chunk;
-		int pos = pblk_ppa_to_pos(geo, rlun->bppa);
-		u8 *lun_bb_meta = chunk_meta + pos * chk_per_lun;
-
-		chunk = &line->chks[pos];
-
-		/*
-		 * In 1.2 spec. chunk state is not persisted by the device. Thus
-		 * some of the values are reset each time pblk is instantiated,
-		 * so we have to assume that the block is closed.
-		 */
-		if (lun_bb_meta[line->id] == NVM_BLK_T_FREE)
-			chunk->state =  NVM_CHK_ST_CLOSED;
-		else
-			chunk->state = NVM_CHK_ST_OFFLINE;
-
-		chunk->type = NVM_CHK_TP_W_SEQ;
-		chunk->wi = 0;
-		chunk->slba = -1;
-		chunk->cnlb = geo->clba;
-		chunk->wp = 0;
-
-		if (!(chunk->state & NVM_CHK_ST_OFFLINE))
-			continue;
-
-		set_bit(pos, line->blk_bitmap);
-		nr_bad_chks++;
-	}
-
-	return nr_bad_chks;
-}
-
-static int pblk_setup_line_meta_20(struct pblk *pblk, struct pblk_line *line,
+static int pblk_setup_line_meta_chk(struct pblk *pblk, struct pblk_line *line,
 				   struct nvm_chk_meta *meta)
 {
 	struct nvm_tgt_dev *dev = pblk->dev;
@@ -772,6 +700,9 @@ static int pblk_setup_line_meta_20(struct pblk *pblk, struct pblk_line *line,
 		chunk->cnlb = chunk_meta->cnlb;
 		chunk->wp = chunk_meta->wp;
 
+		trace_pblk_chunk_state(pblk_disk_name(pblk), &ppa,
+					chunk->state);
+
 		if (chunk->type & NVM_CHK_TP_SZ_SPEC) {
 			WARN_ONCE(1, "pblk: custom-sized chunks unsupported\n");
 			continue;
@@ -790,8 +721,6 @@ static int pblk_setup_line_meta_20(struct pblk *pblk, struct pblk_line *line,
 static long pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line,
 				 void *chunk_meta, int line_id)
 {
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
 	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
 	struct pblk_line_meta *lm = &pblk->lm;
 	long nr_bad_chks, chk_in_line;
@@ -804,10 +733,7 @@ static long pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line,
 	line->vsc = &l_mg->vsc_list[line_id];
 	spin_lock_init(&line->lock);
 
-	if (geo->version == NVM_OCSSD_SPEC_12)
-		nr_bad_chks = pblk_setup_line_meta_12(pblk, line, chunk_meta);
-	else
-		nr_bad_chks = pblk_setup_line_meta_20(pblk, line, chunk_meta);
+	nr_bad_chks = pblk_setup_line_meta_chk(pblk, line, chunk_meta);
 
 	chk_in_line = lm->blk_per_line - nr_bad_chks;
 	if (nr_bad_chks < 0 || nr_bad_chks > lm->blk_per_line ||
@@ -913,6 +839,17 @@ static int pblk_line_mg_init(struct pblk *pblk)
 			goto fail_free_smeta;
 	}
 
+	l_mg->bitmap_cache = kmem_cache_create("pblk_lm_bitmap",
+			lm->sec_bitmap_len, 0, 0, NULL);
+	if (!l_mg->bitmap_cache)
+		goto fail_free_smeta;
+
+	/* the bitmap pool is used for both valid and map bitmaps */
+	l_mg->bitmap_pool = mempool_create_slab_pool(PBLK_DATA_LINES * 2,
+				l_mg->bitmap_cache);
+	if (!l_mg->bitmap_pool)
+		goto fail_destroy_bitmap_cache;
+
 	/* emeta allocates three different buffers for managing metadata with
 	 * in-memory and in-media layouts
 	 */
@@ -965,6 +902,10 @@ fail_free_emeta:
 			kfree(l_mg->eline_meta[i]->buf);
 		kfree(l_mg->eline_meta[i]);
 	}
+
+	mempool_destroy(l_mg->bitmap_pool);
+fail_destroy_bitmap_cache:
+	kmem_cache_destroy(l_mg->bitmap_cache);
 fail_free_smeta:
 	for (i = 0; i < PBLK_DATA_LINES; i++)
 		kfree(l_mg->sline_meta[i]);
@@ -1058,7 +999,7 @@ static int pblk_lines_init(struct pblk *pblk)
 	if (ret)
 		goto fail_free_meta;
 
-	chunk_meta = pblk_chunk_get_meta(pblk);
+	chunk_meta = pblk_get_chunk_meta(pblk);
 	if (IS_ERR(chunk_meta)) {
 		ret = PTR_ERR(chunk_meta);
 		goto fail_free_luns;
@@ -1079,16 +1020,20 @@ static int pblk_lines_init(struct pblk *pblk)
 			goto fail_free_lines;
 
 		nr_free_chks += pblk_setup_line_meta(pblk, line, chunk_meta, i);
+
+		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+								line->state);
 	}
 
 	if (!nr_free_chks) {
 		pblk_err(pblk, "too many bad blocks prevent for sane instance\n");
-		return -EINTR;
+		ret = -EINTR;
+		goto fail_free_lines;
 	}
 
 	pblk_set_provision(pblk, nr_free_chks);
 
-	kfree(chunk_meta);
+	vfree(chunk_meta);
 	return 0;
 
 fail_free_lines:
@@ -1165,7 +1110,6 @@ static void pblk_exit(void *private, bool graceful)
 {
 	struct pblk *pblk = private;
 
-	down_write(&pblk_lock);
 	pblk_gc_exit(pblk, graceful);
 	pblk_tear_down(pblk, graceful);
 
@@ -1174,7 +1118,6 @@ static void pblk_exit(void *private, bool graceful)
 #endif
 
 	pblk_free(pblk);
-	up_write(&pblk_lock);
 }
 
 static sector_t pblk_capacity(void *private)
@@ -1200,6 +1143,7 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
 	pblk->dev = dev;
 	pblk->disk = tdisk;
 	pblk->state = PBLK_STATE_RUNNING;
+	trace_pblk_state(pblk_disk_name(pblk), pblk->state);
 	pblk->gc.gc_enabled = 0;
 
 	if (!(geo->version == NVM_OCSSD_SPEC_12 ||
@@ -1210,13 +1154,6 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
 		return ERR_PTR(-EINVAL);
 	}
 
-	if (geo->version == NVM_OCSSD_SPEC_12 && geo->dom & NVM_RSP_L2P) {
-		pblk_err(pblk, "host-side L2P table not supported. (%x)\n",
-							geo->dom);
-		kfree(pblk);
-		return ERR_PTR(-EINVAL);
-	}
-
 	spin_lock_init(&pblk->resubmit_lock);
 	spin_lock_init(&pblk->trans_lock);
 	spin_lock_init(&pblk->lock);