Merge tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull late SCSI updates from James Bottomley:
 "This is mostly stuff which missed the initial pull.

  There's a new driver: qedi, and some ufs, ibmvscsis and ncr5380
  updates plus some assorted driver fixes and also a fix for the bug
  where if a device goes into a blocked state between configuration and
  sysfs device add (which can be a long time under async probing) it
  would become permanently blocked"

* tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (30 commits)
  scsi: avoid a permanent stop of the scsi device's request queue
  scsi: mpt3sas: Recognize and act on iopriority info
  scsi: qla2xxx: Fix Target mode handling with Multiqueue changes.
  scsi: qla2xxx: Add Block Multi Queue functionality.
  scsi: qla2xxx: Add multiple queue pair functionality.
  scsi: qla2xxx: Utilize pci_alloc_irq_vectors/pci_free_irq_vectors calls.
  scsi: qla2xxx: Only allow operational MBX to proceed during RESET.
  scsi: hpsa: remove memory allocate failure message
  scsi: Update 3ware driver email addresses
  scsi: zfcp: fix rport unblock race with LUN recovery
  scsi: zfcp: do not trace pure benign residual HBA responses at default level
  scsi: zfcp: fix use-after-"free" in FC ingress path after TMF
  scsi: libcxgbi: return error if interface is not up
  scsi: cxgb4i: libcxgbi: add missing module_put()
  scsi: cxgb4i: libcxgbi: cxgb4: add T6 iSCSI completion feature
  scsi: cxgb4i: libcxgbi: add active open cmd for T6 adapters
  scsi: cxgb4i: use cxgb4_tp_smt_idx() to get smt_idx
  scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.
  scsi: aacraid: remove wildcard for series 9 controllers
  scsi: ibmvscsi: add write memory barrier to CRQ processing
  ...

Documentation/scsi/g_NCR5380.txt

@@ -6,17 +6,15 @@ NCR53c400 extensions (c) 1994,1995,1996 Kevin Lentin
 This file documents the NCR53c400 extensions by Kevin Lentin and some
 enhancements to the NCR5380 core.
 
-This driver supports both NCR5380 and NCR53c400 cards in port or memory
-mapped modes. Currently this driver can only support one of those mapping
-modes at a time but it does support both of these chips at the same time.
-The next release of this driver will support port & memory mapped cards at
-the same time. It should be able to handle multiple different cards in the
-same machine.
+This driver supports NCR5380 and NCR53c400 and compatible cards in port or
+memory mapped modes.
 
-The drivers/scsi/Makefile has an override in it for the most common
-NCR53c400 card, the Trantor T130B in its default configuration:
-	Port: 0x350
-	IRQ : 5
+Use of an interrupt is recommended, if supported by the board, as this will
+allow targets to disconnect and thereby improve SCSI bus utilization.
+
+If the irq parameter is 254 or is omitted entirely, the driver will probe
+for the correct IRQ line automatically. If the irq parameter is 0 or 255
+then no IRQ will be used.
 
 The NCR53c400 does not support DMA but it does have Pseudo-DMA which is
 supported by the driver.
@@ -47,22 +45,24 @@ These old-style parameters can support only one card:
   dtc_3181e=1  to set up for a Domex Technology Corp 3181E board
   hp_c2502=1   to set up for a Hewlett Packard C2502 board
 
-e.g.
-OLD: modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
-NEW: modprobe g_NCR5380 irq=5 base=0x350 card=0
-  for a port mapped NCR5380 board or
-
-OLD: modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
-NEW: modprobe g_NCR5380 irq=255 base=0xc8000 card=1
-  for a memory mapped NCR53C400 board with interrupts disabled or
+E.g. Trantor T130B in its default configuration:
+modprobe g_NCR5380 irq=5 base=0x350 card=1
+or alternatively, using the old syntax,
+modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_53c400=1
 
-NEW: modprobe g_NCR5380 irq=0,7 base=0x240,0x300 card=3,4
-  for two cards: DTC3181 (in non-PnP mode) at 0x240 with no IRQ
-             and HP C2502 at 0x300 with IRQ 7
+E.g. a port mapped NCR5380 board, driver to probe for IRQ:
+modprobe g_NCR5380 base=0x350 card=0
+or alternatively,
+modprobe g_NCR5380 ncr_addr=0x350 ncr_5380=1
 
-(255 should be specified for no or DMA interrupt, 254 to autoprobe for an 
-     IRQ line if overridden on the command line.)
+E.g. a memory mapped NCR53C400 board with no IRQ:
+modprobe g_NCR5380 irq=255 base=0xc8000 card=1
+or alternatively,
+modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
 
+E.g. two cards, DTC3181 (in non-PnP mode) at 0x240 with no IRQ
+and HP C2502 at 0x300 with IRQ 7:
+modprobe g_NCR5380 irq=0,7 base=0x240,0x300 card=3,4
 
 Kevin Lentin
 K.Lentin@cs.monash.edu.au

MAINTAINERS

@@ -143,7 +143,7 @@ S:	Maintained
 F:	drivers/net/ethernet/3com/typhoon*
 
 3WARE SAS/SATA-RAID SCSI DRIVERS (3W-XXXX, 3W-9XXX, 3W-SAS)
-M:	Adam Radford <linuxraid@lsi.com>
+M:	Adam Radford <aradford@gmail.com>
 L:	linux-scsi@vger.kernel.org
 W:	http://www.lsi.com
 S:	Supported
@@ -10136,6 +10136,12 @@ F:	drivers/net/ethernet/qlogic/qed/
 F:	include/linux/qed/
 F:	drivers/net/ethernet/qlogic/qede/
 
+QLOGIC QL41xxx ISCSI DRIVER
+M:	QLogic-Storage-Upstream@cavium.com
+L:	linux-scsi@vger.kernel.org
+S:	Supported
+F:	drivers/scsi/qedi/
+
 QNX4 FILESYSTEM
 M:	Anders Larsen <al@alarsen.net>
 W:	http://www.alarsen.net/linux/qnx4fs/

drivers/net/ethernet/chelsio/cxgb4/t4_msg.h

@@ -76,6 +76,7 @@ enum {
 	CPL_PASS_ESTABLISH    = 0x41,
 	CPL_RX_DATA_DDP       = 0x42,
 	CPL_PASS_ACCEPT_REQ   = 0x44,
+	CPL_RX_ISCSI_CMP      = 0x45,
 	CPL_TRACE_PKT_T5      = 0x48,
 	CPL_RX_ISCSI_DDP      = 0x49,
 
@@ -934,6 +935,18 @@ struct cpl_iscsi_data {
 	__u8 status;
 };
 
+struct cpl_rx_iscsi_cmp {
+	union opcode_tid ot;
+	__be16 pdu_len_ddp;
+	__be16 len;
+	__be32 seq;
+	__be16 urg;
+	__u8 rsvd;
+	__u8 status;
+	__be32 ulp_crc;
+	__be32 ddpvld;
+};
+
 struct cpl_tx_data_iso {
 	__be32 op_to_scsi;
 	__u8   reserved1;

drivers/s390/scsi/zfcp_dbf.c

@@ -289,11 +289,12 @@ void zfcp_dbf_rec_trig(char *tag, struct zfcp_adapter *adapter,
 
 
 /**
- * zfcp_dbf_rec_run - trace event related to running recovery
+ * zfcp_dbf_rec_run_lvl - trace event related to running recovery
+ * @level: trace level to be used for event
  * @tag: identifier for event
  * @erp: erp_action running
  */
-void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp)
+void zfcp_dbf_rec_run_lvl(int level, char *tag, struct zfcp_erp_action *erp)
 {
 	struct zfcp_dbf *dbf = erp->adapter->dbf;
 	struct zfcp_dbf_rec *rec = &dbf->rec_buf;
@@ -319,10 +320,20 @@ void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp)
 	else
 		rec->u.run.rec_count = atomic_read(&erp->adapter->erp_counter);
 
-	debug_event(dbf->rec, 1, rec, sizeof(*rec));
+	debug_event(dbf->rec, level, rec, sizeof(*rec));
 	spin_unlock_irqrestore(&dbf->rec_lock, flags);
 }
 
+/**
+ * zfcp_dbf_rec_run - trace event related to running recovery
+ * @tag: identifier for event
+ * @erp: erp_action running
+ */
+void zfcp_dbf_rec_run(char *tag, struct zfcp_erp_action *erp)
+{
+	zfcp_dbf_rec_run_lvl(1, tag, erp);
+}
+
 /**
  * zfcp_dbf_rec_run_wka - trace wka port event with info like running recovery
  * @tag: identifier for event

drivers/s390/scsi/zfcp_dbf.h

@@ -2,7 +2,7 @@
  * zfcp device driver
  * debug feature declarations
  *
- * Copyright IBM Corp. 2008, 2015
+ * Copyright IBM Corp. 2008, 2016
  */
 
 #ifndef ZFCP_DBF_H
@@ -283,6 +283,30 @@ struct zfcp_dbf {
 	struct zfcp_dbf_scsi		scsi_buf;
 };
 
+/**
+ * zfcp_dbf_hba_fsf_resp_suppress - true if we should not trace by default
+ * @req: request that has been completed
+ *
+ * Returns true if FCP response with only benign residual under count.
+ */
+static inline
+bool zfcp_dbf_hba_fsf_resp_suppress(struct zfcp_fsf_req *req)
+{
+	struct fsf_qtcb *qtcb = req->qtcb;
+	u32 fsf_stat = qtcb->header.fsf_status;
+	struct fcp_resp *fcp_rsp;
+	u8 rsp_flags, fr_status;
+
+	if (qtcb->prefix.qtcb_type != FSF_IO_COMMAND)
+		return false; /* not an FCP response */
+	fcp_rsp = (struct fcp_resp *)&qtcb->bottom.io.fcp_rsp;
+	rsp_flags = fcp_rsp->fr_flags;
+	fr_status = fcp_rsp->fr_status;
+	return (fsf_stat == FSF_FCP_RSP_AVAILABLE) &&
+		(rsp_flags == FCP_RESID_UNDER) &&
+		(fr_status == SAM_STAT_GOOD);
+}
+
 static inline
 void zfcp_dbf_hba_fsf_resp(char *tag, int level, struct zfcp_fsf_req *req)
 {
@@ -304,7 +328,9 @@ void zfcp_dbf_hba_fsf_response(struct zfcp_fsf_req *req)
 		zfcp_dbf_hba_fsf_resp("fs_perr", 1, req);
 
 	} else if (qtcb->header.fsf_status != FSF_GOOD) {
-		zfcp_dbf_hba_fsf_resp("fs_ferr", 1, req);
+		zfcp_dbf_hba_fsf_resp("fs_ferr",
+				      zfcp_dbf_hba_fsf_resp_suppress(req)
+				      ? 5 : 1, req);
 
 	} else if ((req->fsf_command == FSF_QTCB_OPEN_PORT_WITH_DID) ||
 		   (req->fsf_command == FSF_QTCB_OPEN_LUN)) {
@@ -388,4 +414,15 @@ void zfcp_dbf_scsi_devreset(char *tag, struct scsi_cmnd *scmnd, u8 flag)
 	_zfcp_dbf_scsi(tmp_tag, 1, scmnd, NULL);
 }
 
+/**
+ * zfcp_dbf_scsi_nullcmnd() - trace NULLify of SCSI command in dev/tgt-reset.
+ * @scmnd: SCSI command that was NULLified.
+ * @fsf_req: request that owned @scmnd.
+ */
+static inline void zfcp_dbf_scsi_nullcmnd(struct scsi_cmnd *scmnd,
+					  struct zfcp_fsf_req *fsf_req)
+{
+	_zfcp_dbf_scsi("scfc__1", 3, scmnd, fsf_req);
+}
+
 #endif /* ZFCP_DBF_H */

drivers/s390/scsi/zfcp_erp.c

@@ -3,7 +3,7 @@
  *
  * Error Recovery Procedures (ERP).
  *
- * Copyright IBM Corp. 2002, 2015
+ * Copyright IBM Corp. 2002, 2016
  */
 
 #define KMSG_COMPONENT "zfcp"
@@ -1204,6 +1204,62 @@ static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action)
 	}
 }
 
+/**
+ * zfcp_erp_try_rport_unblock - unblock rport if no more/new recovery
+ * @port: zfcp_port whose fc_rport we should try to unblock
+ */
+static void zfcp_erp_try_rport_unblock(struct zfcp_port *port)
+{
+	unsigned long flags;
+	struct zfcp_adapter *adapter = port->adapter;
+	int port_status;
+	struct Scsi_Host *shost = adapter->scsi_host;
+	struct scsi_device *sdev;
+
+	write_lock_irqsave(&adapter->erp_lock, flags);
+	port_status = atomic_read(&port->status);
+	if ((port_status & ZFCP_STATUS_COMMON_UNBLOCKED)    == 0 ||
+	    (port_status & (ZFCP_STATUS_COMMON_ERP_INUSE |
+			    ZFCP_STATUS_COMMON_ERP_FAILED)) != 0) {
+		/* new ERP of severity >= port triggered elsewhere meanwhile or
+		 * local link down (adapter erp_failed but not clear unblock)
+		 */
+		zfcp_dbf_rec_run_lvl(4, "ertru_p", &port->erp_action);
+		write_unlock_irqrestore(&adapter->erp_lock, flags);
+		return;
+	}
+	spin_lock(shost->host_lock);
+	__shost_for_each_device(sdev, shost) {
+		struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
+		int lun_status;
+
+		if (zsdev->port != port)
+			continue;
+		/* LUN under port of interest */
+		lun_status = atomic_read(&zsdev->status);
+		if ((lun_status & ZFCP_STATUS_COMMON_ERP_FAILED) != 0)
+			continue; /* unblock rport despite failed LUNs */
+		/* LUN recovery not given up yet [maybe follow-up pending] */
+		if ((lun_status & ZFCP_STATUS_COMMON_UNBLOCKED) == 0 ||
+		    (lun_status & ZFCP_STATUS_COMMON_ERP_INUSE) != 0) {
+			/* LUN blocked:
+			 * not yet unblocked [LUN recovery pending]
+			 * or meanwhile blocked [new LUN recovery triggered]
+			 */
+			zfcp_dbf_rec_run_lvl(4, "ertru_l", &zsdev->erp_action);
+			spin_unlock(shost->host_lock);
+			write_unlock_irqrestore(&adapter->erp_lock, flags);
+			return;
+		}
+	}
+	/* now port has no child or all children have completed recovery,
+	 * and no ERP of severity >= port was meanwhile triggered elsewhere
+	 */
+	zfcp_scsi_schedule_rport_register(port);
+	spin_unlock(shost->host_lock);
+	write_unlock_irqrestore(&adapter->erp_lock, flags);
+}
+
 static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
 {
 	struct zfcp_adapter *adapter = act->adapter;
@@ -1214,6 +1270,7 @@ static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
 	case ZFCP_ERP_ACTION_REOPEN_LUN:
 		if (!(act->status & ZFCP_STATUS_ERP_NO_REF))
 			scsi_device_put(sdev);
+		zfcp_erp_try_rport_unblock(port);
 		break;
 
 	case ZFCP_ERP_ACTION_REOPEN_PORT:
@@ -1224,7 +1281,7 @@ static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
 		 */
 		if (act->step != ZFCP_ERP_STEP_UNINITIALIZED)
 			if (result == ZFCP_ERP_SUCCEEDED)
-				zfcp_scsi_schedule_rport_register(port);
+				zfcp_erp_try_rport_unblock(port);
 		/* fall through */
 	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
 		put_device(&port->dev);

drivers/s390/scsi/zfcp_ext.h

@@ -3,7 +3,7 @@
  *
  * External function declarations.
  *
- * Copyright IBM Corp. 2002, 2015
+ * Copyright IBM Corp. 2002, 2016
  */
 
 #ifndef ZFCP_EXT_H
@@ -35,6 +35,8 @@ extern void zfcp_dbf_adapter_unregister(struct zfcp_adapter *);
 extern void zfcp_dbf_rec_trig(char *, struct zfcp_adapter *,
 			      struct zfcp_port *, struct scsi_device *, u8, u8);
 extern void zfcp_dbf_rec_run(char *, struct zfcp_erp_action *);
+extern void zfcp_dbf_rec_run_lvl(int level, char *tag,
+				 struct zfcp_erp_action *erp);
 extern void zfcp_dbf_rec_run_wka(char *, struct zfcp_fc_wka_port *, u64);
 extern void zfcp_dbf_hba_fsf_uss(char *, struct zfcp_fsf_req *);
 extern void zfcp_dbf_hba_fsf_res(char *, int, struct zfcp_fsf_req *);

drivers/s390/scsi/zfcp_fsf.h

@@ -3,7 +3,7 @@
  *
  * Interface to the FSF support functions.
  *
- * Copyright IBM Corp. 2002, 2015
+ * Copyright IBM Corp. 2002, 2016
  */
 
 #ifndef FSF_H
@@ -78,6 +78,7 @@
 #define FSF_APP_TAG_CHECK_FAILURE		0x00000082
 #define FSF_REF_TAG_CHECK_FAILURE		0x00000083
 #define FSF_ADAPTER_STATUS_AVAILABLE		0x000000AD
+#define FSF_FCP_RSP_AVAILABLE			0x000000AF
 #define FSF_UNKNOWN_COMMAND			0x000000E2
 #define FSF_UNKNOWN_OP_SUBTYPE                  0x000000E3
 #define FSF_INVALID_COMMAND_OPTION              0x000000E5

drivers/s390/scsi/zfcp_reqlist.h

@@ -4,7 +4,7 @@
  * Data structure and helper functions for tracking pending FSF
  * requests.
  *
- * Copyright IBM Corp. 2009
+ * Copyright IBM Corp. 2009, 2016
  */
 
 #ifndef ZFCP_REQLIST_H
@@ -180,4 +180,32 @@ static inline void zfcp_reqlist_move(struct zfcp_reqlist *rl,
 	spin_unlock_irqrestore(&rl->lock, flags);
 }
 
+/**
+ * zfcp_reqlist_apply_for_all() - apply a function to every request.
+ * @rl: the requestlist that contains the target requests.
+ * @f: the function to apply to each request; the first parameter of the
+ *     function will be the target-request; the second parameter is the same
+ *     pointer as given with the argument @data.
+ * @data: freely chosen argument; passed through to @f as second parameter.
+ *
+ * Uses :c:macro:`list_for_each_entry` to iterate over the lists in the hash-
+ * table (not a 'safe' variant, so don't modify the list).
+ *
+ * Holds @rl->lock over the entire request-iteration.
+ */
+static inline void
+zfcp_reqlist_apply_for_all(struct zfcp_reqlist *rl,
+			   void (*f)(struct zfcp_fsf_req *, void *), void *data)
+{
+	struct zfcp_fsf_req *req;
+	unsigned long flags;
+	unsigned int i;
+
+	spin_lock_irqsave(&rl->lock, flags);
+	for (i = 0; i < ZFCP_REQ_LIST_BUCKETS; i++)
+		list_for_each_entry(req, &rl->buckets[i], list)
+			f(req, data);
+	spin_unlock_irqrestore(&rl->lock, flags);
+}
+
 #endif /* ZFCP_REQLIST_H */

drivers/s390/scsi/zfcp_scsi.c

@@ -3,7 +3,7 @@
  *
  * Interface to Linux SCSI midlayer.
  *
- * Copyright IBM Corp. 2002, 2015
+ * Copyright IBM Corp. 2002, 2016
  */
 
 #define KMSG_COMPONENT "zfcp"
@@ -88,9 +88,7 @@ int zfcp_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scpnt)
 	}
 
 	if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
-		/* This could be either
-		 * open LUN pending: this is temporary, will result in
-		 *	open LUN or ERP_FAILED, so retry command
+		/* This could be
 		 * call to rport_delete pending: mimic retry from
 		 * 	fc_remote_port_chkready until rport is BLOCKED
 		 */
@@ -209,6 +207,57 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
 	return retval;
 }
 
+struct zfcp_scsi_req_filter {
+	u8 tmf_scope;
+	u32 lun_handle;
+	u32 port_handle;
+};
+
+static void zfcp_scsi_forget_cmnd(struct zfcp_fsf_req *old_req, void *data)
+{
+	struct zfcp_scsi_req_filter *filter =
+		(struct zfcp_scsi_req_filter *)data;
+
+	/* already aborted - prevent side-effects - or not a SCSI command */
+	if (old_req->data == NULL || old_req->fsf_command != FSF_QTCB_FCP_CMND)
+		return;
+
+	/* (tmf_scope == FCP_TMF_TGT_RESET || tmf_scope == FCP_TMF_LUN_RESET) */
+	if (old_req->qtcb->header.port_handle != filter->port_handle)
+		return;
+
+	if (filter->tmf_scope == FCP_TMF_LUN_RESET &&
+	    old_req->qtcb->header.lun_handle != filter->lun_handle)
+		return;
+
+	zfcp_dbf_scsi_nullcmnd((struct scsi_cmnd *)old_req->data, old_req);
+	old_req->data = NULL;
+}
+
+static void zfcp_scsi_forget_cmnds(struct zfcp_scsi_dev *zsdev, u8 tm_flags)
+{
+	struct zfcp_adapter *adapter = zsdev->port->adapter;
+	struct zfcp_scsi_req_filter filter = {
+		.tmf_scope = FCP_TMF_TGT_RESET,
+		.port_handle = zsdev->port->handle,
+	};
+	unsigned long flags;
+
+	if (tm_flags == FCP_TMF_LUN_RESET) {
+		filter.tmf_scope = FCP_TMF_LUN_RESET;
+		filter.lun_handle = zsdev->lun_handle;
+	}
+
+	/*
+	 * abort_lock secures against other processings - in the abort-function
+	 * and normal cmnd-handler - of (struct zfcp_fsf_req *)->data
+	 */
+	write_lock_irqsave(&adapter->abort_lock, flags);
+	zfcp_reqlist_apply_for_all(adapter->req_list, zfcp_scsi_forget_cmnd,
+				   &filter);
+	write_unlock_irqrestore(&adapter->abort_lock, flags);
+}
+
 static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
 {
 	struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device);
@@ -241,8 +290,10 @@ static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
 	if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
 		zfcp_dbf_scsi_devreset("fail", scpnt, tm_flags);
 		retval = FAILED;
-	} else
+	} else {
 		zfcp_dbf_scsi_devreset("okay", scpnt, tm_flags);
+		zfcp_scsi_forget_cmnds(zfcp_sdev, tm_flags);
+	}
 
 	zfcp_fsf_req_free(fsf_req);
 	return retval;

drivers/scsi/3w-9xxx.c

@@ -1,8 +1,8 @@
 /*
    3w-9xxx.c -- 3ware 9000 Storage Controller device driver for Linux.
 
-   Written By: Adam Radford <linuxraid@lsi.com>
-   Modifications By: Tom Couch <linuxraid@lsi.com>
+   Written By: Adam Radford <aradford@gmail.com>
+   Modifications By: Tom Couch
 
    Copyright (C) 2004-2009 Applied Micro Circuits Corporation.
    Copyright (C) 2010 LSI Corporation.
@@ -41,10 +41,7 @@
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
    Bugs/Comments/Suggestions should be mailed to:
-   linuxraid@lsi.com
-
-   For more information, goto:
-   http://www.lsi.com
+   aradford@gmail.com
 
    Note: This version of the driver does not contain a bundled firmware
          image.

drivers/scsi/3w-9xxx.h

@@ -1,8 +1,8 @@
 /*
    3w-9xxx.h -- 3ware 9000 Storage Controller device driver for Linux.
 
-   Written By: Adam Radford <linuxraid@lsi.com>
-   Modifications By: Tom Couch <linuxraid@lsi.com>
+   Written By: Adam Radford <aradford@gmail.com>
+   Modifications By: Tom Couch
 
    Copyright (C) 2004-2009 Applied Micro Circuits Corporation.
    Copyright (C) 2010 LSI Corporation.
@@ -41,10 +41,7 @@
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
    Bugs/Comments/Suggestions should be mailed to:
-   linuxraid@lsi.com
-
-   For more information, goto:
-   http://www.lsi.com
+   aradford@gmail.com
 */
 
 #ifndef _3W_9XXX_H

drivers/scsi/3w-sas.c

@@ -1,7 +1,7 @@
 /*
    3w-sas.c -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux.
 
-   Written By: Adam Radford <linuxraid@lsi.com>
+   Written By: Adam Radford <aradford@gmail.com>
 
    Copyright (C) 2009 LSI Corporation.
 
@@ -43,10 +43,7 @@
    LSI 3ware 9750 6Gb/s SAS/SATA-RAID
 
    Bugs/Comments/Suggestions should be mailed to:
-   linuxraid@lsi.com
-
-   For more information, goto:
-   http://www.lsi.com
+   aradford@gmail.com
 
    History
    -------

drivers/scsi/3w-sas.h

@@ -1,7 +1,7 @@
 /*
    3w-sas.h -- LSI 3ware SAS/SATA-RAID Controller device driver for Linux.
 
-   Written By: Adam Radford <linuxraid@lsi.com>
+   Written By: Adam Radford <aradford@gmail.com>
 
    Copyright (C) 2009 LSI Corporation.
 
@@ -39,10 +39,7 @@
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
    Bugs/Comments/Suggestions should be mailed to:
-   linuxraid@lsi.com
-
-   For more information, goto:
-   http://www.lsi.com
+   aradford@gmail.com
 */
 
 #ifndef _3W_SAS_H

drivers/scsi/3w-xxxx.c

@@ -1,7 +1,7 @@
 /* 
    3w-xxxx.c -- 3ware Storage Controller device driver for Linux.
 
-   Written By: Adam Radford <linuxraid@lsi.com>
+   Written By: Adam Radford <aradford@gmail.com>
    Modifications By: Joel Jacobson <linux@3ware.com>
    		     Arnaldo Carvalho de Melo <acme@conectiva.com.br>
                      Brad Strand <linux@3ware.com>
@@ -47,10 +47,9 @@
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 
    Bugs/Comments/Suggestions should be mailed to:                            
-   linuxraid@lsi.com
 
-   For more information, goto:
-   http://www.lsi.com
+   aradford@gmail.com
+
 
    History
    -------

drivers/scsi/3w-xxxx.h

@@ -1,7 +1,7 @@
 /* 
    3w-xxxx.h -- 3ware Storage Controller device driver for Linux.
    
-   Written By: Adam Radford <linuxraid@lsi.com>
+   Written By: Adam Radford <aradford@gmail.com>
    Modifications By: Joel Jacobson <linux@3ware.com>
    		     Arnaldo Carvalho de Melo <acme@conectiva.com.br>
                      Brad Strand <linux@3ware.com>
@@ -45,7 +45,8 @@
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 
    Bugs/Comments/Suggestions should be mailed to:                            
-   linuxraid@lsi.com
+
+   aradford@gmail.com
    
    For more information, goto:
    http://www.lsi.com

drivers/scsi/Kconfig

@@ -1233,6 +1233,7 @@ config SCSI_QLOGICPTI
 
 source "drivers/scsi/qla2xxx/Kconfig"
 source "drivers/scsi/qla4xxx/Kconfig"
+source "drivers/scsi/qedi/Kconfig"
 
 config SCSI_LPFC
 	tristate "Emulex LightPulse Fibre Channel Support"

drivers/scsi/Makefile

@@ -131,6 +131,7 @@ obj-$(CONFIG_PS3_ROM)		+= ps3rom.o
 obj-$(CONFIG_SCSI_CXGB3_ISCSI)	+= libiscsi.o libiscsi_tcp.o cxgbi/
 obj-$(CONFIG_SCSI_CXGB4_ISCSI)	+= libiscsi.o libiscsi_tcp.o cxgbi/
 obj-$(CONFIG_SCSI_BNX2_ISCSI)	+= libiscsi.o bnx2i/
+obj-$(CONFIG_QEDI)          += libiscsi.o qedi/
 obj-$(CONFIG_BE2ISCSI)		+= libiscsi.o be2iscsi/
 obj-$(CONFIG_SCSI_ESAS2R)	+= esas2r/
 obj-$(CONFIG_SCSI_PMCRAID)	+= pmcraid.o

drivers/scsi/NCR5380.c

@@ -97,9 +97,6 @@
  * and macros and include this file in your driver.
  *
  * These macros control options :
- * AUTOPROBE_IRQ - if defined, the NCR5380_probe_irq() function will be
- * defined.
- *
  * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
  * for commands that return with a CHECK CONDITION status.
  *
@@ -127,9 +124,7 @@
  * NCR5380_dma_residual   - residual byte count
  *
  * The generic driver is initialized by calling NCR5380_init(instance),
- * after setting the appropriate host specific fields and ID.  If the
- * driver wishes to autoprobe for an IRQ line, the NCR5380_probe_irq(instance,
- * possible) function may be used.
+ * after setting the appropriate host specific fields and ID.
  */
 
 #ifndef NCR5380_io_delay
@@ -351,76 +346,6 @@ static void NCR5380_print_phase(struct Scsi_Host *instance)
 }
 #endif
 
-
-static int probe_irq;
-
-/**
- * probe_intr	-	helper for IRQ autoprobe
- * @irq: interrupt number
- * @dev_id: unused
- * @regs: unused
- *
- * Set a flag to indicate the IRQ in question was received. This is
- * used by the IRQ probe code.
- */
-
-static irqreturn_t probe_intr(int irq, void *dev_id)
-{
-	probe_irq = irq;
-	return IRQ_HANDLED;
-}
-
-/**
- * NCR5380_probe_irq	-	find the IRQ of an NCR5380
- * @instance: NCR5380 controller
- * @possible: bitmask of ISA IRQ lines
- *
- * Autoprobe for the IRQ line used by the NCR5380 by triggering an IRQ
- * and then looking to see what interrupt actually turned up.
- */
-
-static int __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
-						int possible)
-{
-	struct NCR5380_hostdata *hostdata = shost_priv(instance);
-	unsigned long timeout;
-	int trying_irqs, i, mask;
-
-	for (trying_irqs = 0, i = 1, mask = 2; i < 16; ++i, mask <<= 1)
-		if ((mask & possible) && (request_irq(i, &probe_intr, 0, "NCR-probe", NULL) == 0))
-			trying_irqs |= mask;
-
-	timeout = jiffies + msecs_to_jiffies(250);
-	probe_irq = NO_IRQ;
-
-	/*
-	 * A interrupt is triggered whenever BSY = false, SEL = true
-	 * and a bit set in the SELECT_ENABLE_REG is asserted on the
-	 * SCSI bus.
-	 *
-	 * Note that the bus is only driven when the phase control signals
-	 * (I/O, C/D, and MSG) match those in the TCR, so we must reset that
-	 * to zero.
-	 */
-
-	NCR5380_write(TARGET_COMMAND_REG, 0);
-	NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
-	NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
-	NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL);
-
-	while (probe_irq == NO_IRQ && time_before(jiffies, timeout))
-		schedule_timeout_uninterruptible(1);
-
-	NCR5380_write(SELECT_ENABLE_REG, 0);
-	NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
-
-	for (i = 1, mask = 2; i < 16; ++i, mask <<= 1)
-		if (trying_irqs & mask)
-			free_irq(i, NULL);
-
-	return probe_irq;
-}
-
 /**
  * NCR58380_info - report driver and host information
  * @instance: relevant scsi host instance

drivers/scsi/NCR5380.h

@@ -199,16 +199,6 @@
 
 #define PHASE_SR_TO_TCR(phase) ((phase) >> 2)
 
-/*
- * These are "special" values for the irq and dma_channel fields of the 
- * Scsi_Host structure
- */
-
-#define DMA_NONE	255
-#define IRQ_AUTO	254
-#define DMA_AUTO	254
-#define PORT_AUTO	0xffff	/* autoprobe io port for 53c400a */
-
 #ifndef NO_IRQ
 #define NO_IRQ		0
 #endif
@@ -290,7 +280,6 @@ static void NCR5380_print(struct Scsi_Host *instance);
 #define NCR5380_dprint_phase(flg, arg) do {} while (0)
 #endif
 
-static int NCR5380_probe_irq(struct Scsi_Host *instance, int possible);
 static int NCR5380_init(struct Scsi_Host *instance, int flags);
 static int NCR5380_maybe_reset_bus(struct Scsi_Host *);
 static void NCR5380_exit(struct Scsi_Host *instance);

drivers/scsi/aacraid/linit.c

@@ -160,7 +160,6 @@ static const struct pci_device_id aac_pci_tbl[] = {
 	{ 0x9005, 0x028b, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 62 }, /* Adaptec PMC Series 6 (Tupelo) */
 	{ 0x9005, 0x028c, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 63 }, /* Adaptec PMC Series 7 (Denali) */
 	{ 0x9005, 0x028d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 64 }, /* Adaptec PMC Series 8 */
-	{ 0x9005, 0x028f, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 65 }, /* Adaptec PMC Series 9 */
 	{ 0,}
 };
 MODULE_DEVICE_TABLE(pci, aac_pci_tbl);
@@ -239,7 +238,6 @@ static struct aac_driver_ident aac_drivers[] = {
 	{ aac_src_init, "aacraid", "ADAPTEC ", "RAID            ", 2, AAC_QUIRK_SRC }, /* Adaptec PMC Series 6 (Tupelo) */
 	{ aac_srcv_init, "aacraid", "ADAPTEC ", "RAID            ", 2, AAC_QUIRK_SRC }, /* Adaptec PMC Series 7 (Denali) */
 	{ aac_srcv_init, "aacraid", "ADAPTEC ", "RAID            ", 2, AAC_QUIRK_SRC }, /* Adaptec PMC Series 8 */
-	{ aac_srcv_init, "aacraid", "ADAPTEC ", "RAID            ", 2, AAC_QUIRK_SRC } /* Adaptec PMC Series 9 */
 };
 
 /**

drivers/scsi/cxgbi/cxgb4i/cxgb4i.c

@@ -189,7 +189,6 @@ static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 				struct l2t_entry *e)
 {
 	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
-	int t4 = is_t4(lldi->adapter_type);
 	int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 	unsigned long long opt0;
 	unsigned int opt2;
@@ -232,7 +231,7 @@ static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 			csk, &req->local_ip, ntohs(req->local_port),
 			&req->peer_ip, ntohs(req->peer_port),
 			csk->atid, csk->rss_qid);
-	} else {
+	} else if (is_t5(lldi->adapter_type)) {
 		struct cpl_t5_act_open_req *req =
 				(struct cpl_t5_act_open_req *)skb->head;
 		u32 isn = (prandom_u32() & ~7UL) - 1;
@@ -260,12 +259,45 @@ static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb,
 			csk, &req->local_ip, ntohs(req->local_port),
 			&req->peer_ip, ntohs(req->peer_port),
 			csk->atid, csk->rss_qid);
+	} else {
+		struct cpl_t6_act_open_req *req =
+				(struct cpl_t6_act_open_req *)skb->head;
+		u32 isn = (prandom_u32() & ~7UL) - 1;
+
+		INIT_TP_WR(req, 0);
+		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ,
+							    qid_atid));
+		req->local_port = csk->saddr.sin_port;
+		req->peer_port = csk->daddr.sin_port;
+		req->local_ip = csk->saddr.sin_addr.s_addr;
+		req->peer_ip = csk->daddr.sin_addr.s_addr;
+		req->opt0 = cpu_to_be64(opt0);
+		req->params = cpu_to_be64(FILTER_TUPLE_V(
+				cxgb4_select_ntuple(
+					csk->cdev->ports[csk->port_id],
+					csk->l2t)));
+		req->rsvd = cpu_to_be32(isn);
+
+		opt2 |= T5_ISS_VALID;
+		opt2 |= RX_FC_DISABLE_F;
+		opt2 |= T5_OPT_2_VALID_F;
+
+		req->opt2 = cpu_to_be32(opt2);
+		req->rsvd2 = cpu_to_be32(0);
+		req->opt3 = cpu_to_be32(0);
+
+		log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+			  "csk t6 0x%p, %pI4:%u-%pI4:%u, atid %d, qid %u.\n",
+			  csk, &req->local_ip, ntohs(req->local_port),
+			  &req->peer_ip, ntohs(req->peer_port),
+			  csk->atid, csk->rss_qid);
 	}
 
 	set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 
 	pr_info_ipaddr("t%d csk 0x%p,%u,0x%lx,%u, rss_qid %u.\n",
-		       (&csk->saddr), (&csk->daddr), t4 ? 4 : 5, csk,
+		       (&csk->saddr), (&csk->daddr),
+		       CHELSIO_CHIP_VERSION(lldi->adapter_type), csk,
 		       csk->state, csk->flags, csk->atid, csk->rss_qid);
 
 	cxgb4_l2t_send(csk->cdev->ports[csk->port_id], skb, csk->l2t);
@@ -276,7 +308,6 @@ static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
 			       struct l2t_entry *e)
 {
 	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(csk->cdev);
-	int t4 = is_t4(lldi->adapter_type);
 	int wscale = cxgbi_sock_compute_wscale(csk->mss_idx);
 	unsigned long long opt0;
 	unsigned int opt2;
@@ -294,10 +325,9 @@ static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
 
 	opt2 = RX_CHANNEL_V(0) |
 		RSS_QUEUE_VALID_F |
-		RX_FC_DISABLE_F |
 		RSS_QUEUE_V(csk->rss_qid);
 
-	if (t4) {
+	if (is_t4(lldi->adapter_type)) {
 		struct cpl_act_open_req6 *req =
 			    (struct cpl_act_open_req6 *)skb->head;
 
@@ -322,7 +352,7 @@ static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
 		req->params = cpu_to_be32(cxgb4_select_ntuple(
 					  csk->cdev->ports[csk->port_id],
 					  csk->l2t));
-	} else {
+	} else if (is_t5(lldi->adapter_type)) {
 		struct cpl_t5_act_open_req6 *req =
 				(struct cpl_t5_act_open_req6 *)skb->head;
 
@@ -345,12 +375,41 @@ static void send_act_open_req6(struct cxgbi_sock *csk, struct sk_buff *skb,
 		req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
 					  csk->cdev->ports[csk->port_id],
 					  csk->l2t)));
+	} else {
+		struct cpl_t6_act_open_req6 *req =
+				(struct cpl_t6_act_open_req6 *)skb->head;
+
+		INIT_TP_WR(req, 0);
+		OPCODE_TID(req) = cpu_to_be32(MK_OPCODE_TID(CPL_ACT_OPEN_REQ6,
+							    qid_atid));
+		req->local_port = csk->saddr6.sin6_port;
+		req->peer_port = csk->daddr6.sin6_port;
+		req->local_ip_hi = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr);
+		req->local_ip_lo = *(__be64 *)(csk->saddr6.sin6_addr.s6_addr +
+									8);
+		req->peer_ip_hi = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr);
+		req->peer_ip_lo = *(__be64 *)(csk->daddr6.sin6_addr.s6_addr +
+									8);
+		req->opt0 = cpu_to_be64(opt0);
+
+		opt2 |= RX_FC_DISABLE_F;
+		opt2 |= T5_OPT_2_VALID_F;
+
+		req->opt2 = cpu_to_be32(opt2);
+
+		req->params = cpu_to_be64(FILTER_TUPLE_V(cxgb4_select_ntuple(
+					  csk->cdev->ports[csk->port_id],
+					  csk->l2t)));
+
+		req->rsvd2 = cpu_to_be32(0);
+		req->opt3 = cpu_to_be32(0);
 	}
 
 	set_wr_txq(skb, CPL_PRIORITY_SETUP, csk->port_id);
 
 	pr_info("t%d csk 0x%p,%u,0x%lx,%u, [%pI6]:%u-[%pI6]:%u, rss_qid %u.\n",
-		t4 ? 4 : 5, csk, csk->state, csk->flags, csk->atid,
+		CHELSIO_CHIP_VERSION(lldi->adapter_type), csk, csk->state,
+		csk->flags, csk->atid,
 		&csk->saddr6.sin6_addr, ntohs(csk->saddr.sin_port),
 		&csk->daddr6.sin6_addr, ntohs(csk->daddr.sin_port),
 		csk->rss_qid);
@@ -742,7 +801,7 @@ static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
 		       (&csk->saddr), (&csk->daddr),
 		       atid, tid, csk, csk->state, csk->flags, rcv_isn);
 
-	module_put(THIS_MODULE);
+	module_put(cdev->owner);
 
 	cxgbi_sock_get(csk);
 	csk->tid = tid;
@@ -891,7 +950,7 @@ static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
 	if (is_neg_adv(status))
 		goto rel_skb;
 
-	module_put(THIS_MODULE);
+	module_put(cdev->owner);
 
 	if (status && status != CPL_ERR_TCAM_FULL &&
 	    status != CPL_ERR_CONN_EXIST &&
@@ -1173,6 +1232,101 @@ rel_skb:
 	__kfree_skb(skb);
 }
 
+static void do_rx_iscsi_data(struct cxgbi_device *cdev, struct sk_buff *skb)
+{
+	struct cxgbi_sock *csk;
+	struct cpl_iscsi_hdr *cpl = (struct cpl_iscsi_hdr *)skb->data;
+	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
+	struct tid_info *t = lldi->tids;
+	struct sk_buff *lskb;
+	u32 tid = GET_TID(cpl);
+	u16 pdu_len_ddp = be16_to_cpu(cpl->pdu_len_ddp);
+
+	csk = lookup_tid(t, tid);
+	if (unlikely(!csk)) {
+		pr_err("can't find conn. for tid %u.\n", tid);
+		goto rel_skb;
+	}
+
+	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
+		  "csk 0x%p,%u,0x%lx, tid %u, skb 0x%p,%u, 0x%x.\n",
+		  csk, csk->state, csk->flags, csk->tid, skb,
+		  skb->len, pdu_len_ddp);
+
+	spin_lock_bh(&csk->lock);
+
+	if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
+		log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+			  "csk 0x%p,%u,0x%lx,%u, bad state.\n",
+			  csk, csk->state, csk->flags, csk->tid);
+
+		if (csk->state != CTP_ABORTING)
+			goto abort_conn;
+		else
+			goto discard;
+	}
+
+	cxgbi_skcb_tcp_seq(skb) = be32_to_cpu(cpl->seq);
+	cxgbi_skcb_flags(skb) = 0;
+
+	skb_reset_transport_header(skb);
+	__skb_pull(skb, sizeof(*cpl));
+	__pskb_trim(skb, ntohs(cpl->len));
+
+	if (!csk->skb_ulp_lhdr)
+		csk->skb_ulp_lhdr = skb;
+
+	lskb = csk->skb_ulp_lhdr;
+	cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA);
+
+	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
+		  "csk 0x%p,%u,0x%lx, skb 0x%p data, 0x%p.\n",
+		  csk, csk->state, csk->flags, skb, lskb);
+
+	__skb_queue_tail(&csk->receive_queue, skb);
+	spin_unlock_bh(&csk->lock);
+	return;
+
+abort_conn:
+	send_abort_req(csk);
+discard:
+	spin_unlock_bh(&csk->lock);
+rel_skb:
+	__kfree_skb(skb);
+}
+
+static void
+cxgb4i_process_ddpvld(struct cxgbi_sock *csk,
+		      struct sk_buff *skb, u32 ddpvld)
+{
+	if (ddpvld & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
+		pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
+			csk, skb, ddpvld, cxgbi_skcb_flags(skb));
+		cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR);
+	}
+
+	if (ddpvld & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
+		pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
+			csk, skb, ddpvld, cxgbi_skcb_flags(skb));
+		cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR);
+	}
+
+	if (ddpvld & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
+		log_debug(1 << CXGBI_DBG_PDU_RX,
+			  "csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
+			  csk, skb, ddpvld);
+		cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR);
+	}
+
+	if ((ddpvld & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
+	    !cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA)) {
+		log_debug(1 << CXGBI_DBG_PDU_RX,
+			  "csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
+			  csk, skb, ddpvld);
+		cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD);
+	}
+}
+
 static void do_rx_data_ddp(struct cxgbi_device *cdev,
 				  struct sk_buff *skb)
 {
@@ -1182,7 +1336,7 @@ static void do_rx_data_ddp(struct cxgbi_device *cdev,
 	unsigned int tid = GET_TID(rpl);
 	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
 	struct tid_info *t = lldi->tids;
-	unsigned int status = ntohl(rpl->ddpvld);
+	u32 ddpvld = be32_to_cpu(rpl->ddpvld);
 
 	csk = lookup_tid(t, tid);
 	if (unlikely(!csk)) {
@@ -1192,7 +1346,7 @@ static void do_rx_data_ddp(struct cxgbi_device *cdev,
 
 	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
 		"csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p.\n",
-		csk, csk->state, csk->flags, skb, status, csk->skb_ulp_lhdr);
+		csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr);
 
 	spin_lock_bh(&csk->lock);
 
@@ -1220,29 +1374,8 @@ static void do_rx_data_ddp(struct cxgbi_device *cdev,
 		pr_info("tid 0x%x, RX_DATA_DDP pdulen %u != %u.\n",
 			csk->tid, ntohs(rpl->len), cxgbi_skcb_rx_pdulen(lskb));
 
-	if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) {
-		pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, hcrc bad 0x%lx.\n",
-			csk, lskb, status, cxgbi_skcb_flags(lskb));
-		cxgbi_skcb_set_flag(lskb, SKCBF_RX_HCRC_ERR);
-	}
-	if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) {
-		pr_info("csk 0x%p, lhdr 0x%p, status 0x%x, dcrc bad 0x%lx.\n",
-			csk, lskb, status, cxgbi_skcb_flags(lskb));
-		cxgbi_skcb_set_flag(lskb, SKCBF_RX_DCRC_ERR);
-	}
-	if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) {
-		log_debug(1 << CXGBI_DBG_PDU_RX,
-			"csk 0x%p, lhdr 0x%p, status 0x%x, pad bad.\n",
-			csk, lskb, status);
-		cxgbi_skcb_set_flag(lskb, SKCBF_RX_PAD_ERR);
-	}
-	if ((status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) &&
-		!cxgbi_skcb_test_flag(lskb, SKCBF_RX_DATA)) {
-		log_debug(1 << CXGBI_DBG_PDU_RX,
-			"csk 0x%p, lhdr 0x%p, 0x%x, data ddp'ed.\n",
-			csk, lskb, status);
-		cxgbi_skcb_set_flag(lskb, SKCBF_RX_DATA_DDPD);
-	}
+	cxgb4i_process_ddpvld(csk, lskb, ddpvld);
+
 	log_debug(1 << CXGBI_DBG_PDU_RX,
 		"csk 0x%p, lskb 0x%p, f 0x%lx.\n",
 		csk, lskb, cxgbi_skcb_flags(lskb));
@@ -1260,6 +1393,98 @@ rel_skb:
 	__kfree_skb(skb);
 }
 
+static void
+do_rx_iscsi_cmp(struct cxgbi_device *cdev, struct sk_buff *skb)
+{
+	struct cxgbi_sock *csk;
+	struct cpl_rx_iscsi_cmp *rpl = (struct cpl_rx_iscsi_cmp *)skb->data;
+	struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev);
+	struct tid_info *t = lldi->tids;
+	struct sk_buff *data_skb = NULL;
+	u32 tid = GET_TID(rpl);
+	u32 ddpvld = be32_to_cpu(rpl->ddpvld);
+	u32 seq = be32_to_cpu(rpl->seq);
+	u16 pdu_len_ddp = be16_to_cpu(rpl->pdu_len_ddp);
+
+	csk = lookup_tid(t, tid);
+	if (unlikely(!csk)) {
+		pr_err("can't find connection for tid %u.\n", tid);
+		goto rel_skb;
+	}
+
+	log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX,
+		  "csk 0x%p,%u,0x%lx, skb 0x%p,0x%x, lhdr 0x%p, len %u, "
+		  "pdu_len_ddp %u, status %u.\n",
+		  csk, csk->state, csk->flags, skb, ddpvld, csk->skb_ulp_lhdr,
+		  ntohs(rpl->len), pdu_len_ddp,  rpl->status);
+
+	spin_lock_bh(&csk->lock);
+
+	if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) {
+		log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK,
+			  "csk 0x%p,%u,0x%lx,%u, bad state.\n",
+			  csk, csk->state, csk->flags, csk->tid);
+
+		if (csk->state != CTP_ABORTING)
+			goto abort_conn;
+		else
+			goto discard;
+	}
+
+	cxgbi_skcb_tcp_seq(skb) = seq;
+	cxgbi_skcb_flags(skb) = 0;
+	cxgbi_skcb_rx_pdulen(skb) = 0;
+
+	skb_reset_transport_header(skb);
+	__skb_pull(skb, sizeof(*rpl));
+	__pskb_trim(skb, be16_to_cpu(rpl->len));
+
+	csk->rcv_nxt = seq + pdu_len_ddp;
+
+	if (csk->skb_ulp_lhdr) {
+		data_skb = skb_peek(&csk->receive_queue);
+		if (!data_skb ||
+		    !cxgbi_skcb_test_flag(data_skb, SKCBF_RX_DATA)) {
+			pr_err("Error! freelist data not found 0x%p, tid %u\n",
+			       data_skb, tid);
+
+			goto abort_conn;
+		}
+		__skb_unlink(data_skb, &csk->receive_queue);
+
+		cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA);
+
+		__skb_queue_tail(&csk->receive_queue, skb);
+		__skb_queue_tail(&csk->receive_queue, data_skb);
+	} else {
+		 __skb_queue_tail(&csk->receive_queue, skb);
+	}
+
+	csk->skb_ulp_lhdr = NULL;
+
+	cxgbi_skcb_set_flag(skb, SKCBF_RX_HDR);
+	cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS);
+	cxgbi_skcb_set_flag(skb, SKCBF_RX_ISCSI_COMPL);
+	cxgbi_skcb_rx_ddigest(skb) = be32_to_cpu(rpl->ulp_crc);
+
+	cxgb4i_process_ddpvld(csk, skb, ddpvld);
+
+	log_debug(1 << CXGBI_DBG_PDU_RX, "csk 0x%p, skb 0x%p, f 0x%lx.\n",
+		  csk, skb, cxgbi_skcb_flags(skb));
+
+	cxgbi_conn_pdu_ready(csk);
+	spin_unlock_bh(&csk->lock);
+
+	return;
+
+abort_conn:
+	send_abort_req(csk);
+discard:
+	spin_unlock_bh(&csk->lock);
+rel_skb:
+	__kfree_skb(skb);
+}
+
 static void do_fw4_ack(struct cxgbi_device *cdev, struct sk_buff *skb)
 {
 	struct cxgbi_sock *csk;
@@ -1382,7 +1607,6 @@ static int init_act_open(struct cxgbi_sock *csk)
 	void *daddr;
 	unsigned int step;
 	unsigned int size, size6;
-	int t4 = is_t4(lldi->adapter_type);
 	unsigned int linkspeed;
 	unsigned int rcv_winf, snd_winf;
 
@@ -1428,12 +1652,15 @@ static int init_act_open(struct cxgbi_sock *csk)
 		cxgb4_clip_get(ndev, (const u32 *)&csk->saddr6.sin6_addr, 1);
 #endif
 
-	if (t4) {
+	if (is_t4(lldi->adapter_type)) {
 		size = sizeof(struct cpl_act_open_req);
 		size6 = sizeof(struct cpl_act_open_req6);
-	} else {
+	} else if (is_t5(lldi->adapter_type)) {
 		size = sizeof(struct cpl_t5_act_open_req);
 		size6 = sizeof(struct cpl_t5_act_open_req6);
+	} else {
+		size = sizeof(struct cpl_t6_act_open_req);
+		size6 = sizeof(struct cpl_t6_act_open_req6);
 	}
 
 	if (csk->csk_family == AF_INET)
@@ -1452,8 +1679,8 @@ static int init_act_open(struct cxgbi_sock *csk)
 		csk->mtu = dst_mtu(csk->dst);
 	cxgb4_best_mtu(lldi->mtus, csk->mtu, &csk->mss_idx);
 	csk->tx_chan = cxgb4_port_chan(ndev);
-	/* SMT two entries per row */
-	csk->smac_idx = ((cxgb4_port_viid(ndev) & 0x7F)) << 1;
+	csk->smac_idx = cxgb4_tp_smt_idx(lldi->adapter_type,
+					 cxgb4_port_viid(ndev));
 	step = lldi->ntxq / lldi->nchan;
 	csk->txq_idx = cxgb4_port_idx(ndev) * step;
 	step = lldi->nrxq / lldi->nchan;
@@ -1486,7 +1713,11 @@ static int init_act_open(struct cxgbi_sock *csk)
 		       csk->mtu, csk->mss_idx, csk->smac_idx);
 
 	/* must wait for either a act_open_rpl or act_open_establish */
-	try_module_get(THIS_MODULE);
+	if (!try_module_get(cdev->owner)) {
+		pr_err("%s, try_module_get failed.\n", ndev->name);
+		goto rel_resource;
+	}
+
 	cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
 	if (csk->csk_family == AF_INET)
 		send_act_open_req(csk, skb, csk->l2t);
@@ -1521,10 +1752,11 @@ static cxgb4i_cplhandler_func cxgb4i_cplhandlers[NUM_CPL_CMDS] = {
 	[CPL_CLOSE_CON_RPL] = do_close_con_rpl,
 	[CPL_FW4_ACK] = do_fw4_ack,
 	[CPL_ISCSI_HDR] = do_rx_iscsi_hdr,
-	[CPL_ISCSI_DATA] = do_rx_iscsi_hdr,
+	[CPL_ISCSI_DATA] = do_rx_iscsi_data,
 	[CPL_SET_TCB_RPL] = do_set_tcb_rpl,
 	[CPL_RX_DATA_DDP] = do_rx_data_ddp,
 	[CPL_RX_ISCSI_DDP] = do_rx_data_ddp,
+	[CPL_RX_ISCSI_CMP] = do_rx_iscsi_cmp,
 	[CPL_RX_DATA] = do_rx_data,
 };
 
@@ -1794,10 +2026,12 @@ static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
 	cdev->nports = lldi->nports;
 	cdev->mtus = lldi->mtus;
 	cdev->nmtus = NMTUS;
-	cdev->rx_credit_thres = cxgb4i_rx_credit_thres;
+	cdev->rx_credit_thres = (CHELSIO_CHIP_VERSION(lldi->adapter_type) <=
+				 CHELSIO_T5) ? cxgb4i_rx_credit_thres : 0;
 	cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
 	cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
 	cdev->itp = &cxgb4i_iscsi_transport;
+	cdev->owner = THIS_MODULE;
 
 	cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
 			<< FW_VIID_PFN_S;

drivers/scsi/cxgbi/libcxgbi.c

@@ -642,6 +642,12 @@ static struct cxgbi_sock *cxgbi_check_route(struct sockaddr *dst_addr)
 			n->dev->name, ndev->name, mtu);
 	}
 
+	if (!(ndev->flags & IFF_UP) || !netif_carrier_ok(ndev)) {
+		pr_info("%s interface not up.\n", ndev->name);
+		err = -ENETDOWN;
+		goto rel_neigh;
+	}
+
 	cdev = cxgbi_device_find_by_netdev(ndev, &port);
 	if (!cdev) {
 		pr_info("dst %pI4, %s, NOT cxgbi device.\n",
@@ -736,6 +742,12 @@ static struct cxgbi_sock *cxgbi_check_route6(struct sockaddr *dst_addr)
 	}
 	ndev = n->dev;
 
+	if (!(ndev->flags & IFF_UP) || !netif_carrier_ok(ndev)) {
+		pr_info("%s interface not up.\n", ndev->name);
+		err = -ENETDOWN;
+		goto rel_rt;
+	}
+
 	if (ipv6_addr_is_multicast(&daddr6->sin6_addr)) {
 		pr_info("multi-cast route %pI6 port %u, dev %s.\n",
 			daddr6->sin6_addr.s6_addr,
@@ -896,6 +908,7 @@ EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open);
 void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb)
 {
 	struct cxgbi_sock *csk = (struct cxgbi_sock *)skb->sk;
+	struct module *owner = csk->cdev->owner;
 
 	log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
 		csk, (csk)->state, (csk)->flags, (csk)->tid);
@@ -906,6 +919,8 @@ void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb)
 	spin_unlock_bh(&csk->lock);
 	cxgbi_sock_put(csk);
 	__kfree_skb(skb);
+
+	module_put(owner);
 }
 EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure);
 
@@ -1574,6 +1589,25 @@ static int skb_read_pdu_bhs(struct iscsi_conn *conn, struct sk_buff *skb)
 		return -EIO;
 	}
 
+	if (cxgbi_skcb_test_flag(skb, SKCBF_RX_ISCSI_COMPL) &&
+	    cxgbi_skcb_test_flag(skb, SKCBF_RX_DATA_DDPD)) {
+		/* If completion flag is set and data is directly
+		 * placed in to the host memory then update
+		 * task->exp_datasn to the datasn in completion
+		 * iSCSI hdr as T6 adapter generates completion only
+		 * for the last pdu of a sequence.
+		 */
+		itt_t itt = ((struct iscsi_data *)skb->data)->itt;
+		struct iscsi_task *task = iscsi_itt_to_ctask(conn, itt);
+		u32 data_sn = be32_to_cpu(((struct iscsi_data *)
+							skb->data)->datasn);
+		if (task && task->sc) {
+			struct iscsi_tcp_task *tcp_task = task->dd_data;
+
+			tcp_task->exp_datasn = data_sn;
+		}
+	}
+
 	return read_pdu_skb(conn, skb, 0, 0);
 }
 
@@ -1627,15 +1661,15 @@ static void csk_return_rx_credits(struct cxgbi_sock *csk, int copied)
 		csk->rcv_wup, cdev->rx_credit_thres,
 		csk->rcv_win);
 
+	if (!cdev->rx_credit_thres)
+		return;
+
 	if (csk->state != CTP_ESTABLISHED)
 		return;
 
 	credits = csk->copied_seq - csk->rcv_wup;
 	if (unlikely(!credits))
 		return;
-	if (unlikely(cdev->rx_credit_thres == 0))
-		return;
-
 	must_send = credits + 16384 >= csk->rcv_win;
 	if (must_send || credits >= cdev->rx_credit_thres)
 		csk->rcv_wup += cdev->csk_send_rx_credits(csk, credits);

drivers/scsi/cxgbi/libcxgbi.h

@@ -207,6 +207,7 @@ enum cxgbi_skcb_flags {
 	SKCBF_RX_HDR,		/* received pdu header */
 	SKCBF_RX_DATA,		/* received pdu payload */
 	SKCBF_RX_STATUS,	/* received ddp status */
+	SKCBF_RX_ISCSI_COMPL,   /* received iscsi completion */
 	SKCBF_RX_DATA_DDPD,	/* pdu payload ddp'd */
 	SKCBF_RX_HCRC_ERR,	/* header digest error */
 	SKCBF_RX_DCRC_ERR,	/* data digest error */
@@ -467,6 +468,7 @@ struct cxgbi_device {
 	struct pci_dev *pdev;
 	struct dentry *debugfs_root;
 	struct iscsi_transport *itp;
+	struct module *owner;
 
 	unsigned int pfvf;
 	unsigned int rx_credit_thres;

drivers/scsi/g_NCR5380.c

@@ -37,7 +37,7 @@
 #define MAX_CARDS 8
 
 /* old-style parameters for compatibility */
-static int ncr_irq;
+static int ncr_irq = -1;
 static int ncr_addr;
 static int ncr_5380;
 static int ncr_53c400;
@@ -52,9 +52,9 @@ module_param(ncr_53c400a, int, 0);
 module_param(dtc_3181e, int, 0);
 module_param(hp_c2502, int, 0);
 
-static int irq[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+static int irq[] = { -1, -1, -1, -1, -1, -1, -1, -1 };
 module_param_array(irq, int, NULL, 0);
-MODULE_PARM_DESC(irq, "IRQ number(s)");
+MODULE_PARM_DESC(irq, "IRQ number(s) (0=none, 254=auto [default])");
 
 static int base[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 module_param_array(base, int, NULL, 0);
@@ -67,6 +67,56 @@ MODULE_PARM_DESC(card, "card type (0=NCR5380, 1=NCR53C400, 2=NCR53C400A, 3=DTC31
 MODULE_ALIAS("g_NCR5380_mmio");
 MODULE_LICENSE("GPL");
 
+static void g_NCR5380_trigger_irq(struct Scsi_Host *instance)
+{
+	struct NCR5380_hostdata *hostdata = shost_priv(instance);
+
+	/*
+	 * An interrupt is triggered whenever BSY = false, SEL = true
+	 * and a bit set in the SELECT_ENABLE_REG is asserted on the
+	 * SCSI bus.
+	 *
+	 * Note that the bus is only driven when the phase control signals
+	 * (I/O, C/D, and MSG) match those in the TCR.
+	 */
+	NCR5380_write(TARGET_COMMAND_REG,
+	              PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK));
+	NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
+	NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
+	NCR5380_write(INITIATOR_COMMAND_REG,
+	              ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL);
+
+	msleep(1);
+
+	NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
+	NCR5380_write(SELECT_ENABLE_REG, 0);
+	NCR5380_write(TARGET_COMMAND_REG, 0);
+}
+
+/**
+ * g_NCR5380_probe_irq - find the IRQ of a NCR5380 or equivalent
+ * @instance: SCSI host instance
+ *
+ * Autoprobe for the IRQ line used by the card by triggering an IRQ
+ * and then looking to see what interrupt actually turned up.
+ */
+
+static int g_NCR5380_probe_irq(struct Scsi_Host *instance)
+{
+	struct NCR5380_hostdata *hostdata = shost_priv(instance);
+	int irq_mask, irq;
+
+	NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+	irq_mask = probe_irq_on();
+	g_NCR5380_trigger_irq(instance);
+	irq = probe_irq_off(irq_mask);
+	NCR5380_read(RESET_PARITY_INTERRUPT_REG);
+
+	if (irq <= 0)
+		return NO_IRQ;
+	return irq;
+}
+
 /*
  * Configure I/O address of 53C400A or DTC436 by writing magic numbers
  * to ports 0x779 and 0x379.
@@ -81,14 +131,33 @@ static void magic_configure(int idx, u8 irq, u8 magic[])
 	outb(magic[3], 0x379);
 	outb(magic[4], 0x379);
 
-	/* allowed IRQs for HP C2502 */
-	if (irq != 2 && irq != 3 && irq != 4 && irq != 5 && irq != 7)
-		irq = 0;
+	if (irq == 9)
+		irq = 2;
+
 	if (idx >= 0 && idx <= 7)
 		cfg = 0x80 | idx | (irq << 4);
 	outb(cfg, 0x379);
 }
 
+static irqreturn_t legacy_empty_irq_handler(int irq, void *dev_id)
+{
+	return IRQ_HANDLED;
+}
+
+static int legacy_find_free_irq(int *irq_table)
+{
+	while (*irq_table != -1) {
+		if (!request_irq(*irq_table, legacy_empty_irq_handler,
+		                 IRQF_PROBE_SHARED, "Test IRQ",
+		                 (void *)irq_table)) {
+			free_irq(*irq_table, (void *) irq_table);
+			return *irq_table;
+		}
+		irq_table++;
+	}
+	return -1;
+}
+
 static unsigned int ncr_53c400a_ports[] = {
 	0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 };
@@ -101,6 +170,9 @@ static u8 ncr_53c400a_magic[] = {	/* 53C400A & DTC436 */
 static u8 hp_c2502_magic[] = {	/* HP C2502 */
 	0x0f, 0x22, 0xf0, 0x20, 0x80
 };
+static int hp_c2502_irqs[] = {
+	9, 5, 7, 3, 4, -1
+};
 
 static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
 			struct device *pdev, int base, int irq, int board)
@@ -248,6 +320,13 @@ static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
 		}
 	}
 
+	/* Check for vacant slot */
+	NCR5380_write(MODE_REG, 0);
+	if (NCR5380_read(MODE_REG) != 0) {
+		ret = -ENODEV;
+		goto out_unregister;
+	}
+
 	ret = NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP);
 	if (ret)
 		goto out_unregister;
@@ -262,31 +341,59 @@ static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
 
 	NCR5380_maybe_reset_bus(instance);
 
-	if (irq != IRQ_AUTO)
-		instance->irq = irq;
-	else
-		instance->irq = NCR5380_probe_irq(instance, 0xffff);
-
 	/* Compatibility with documented NCR5380 kernel parameters */
-	if (instance->irq == 255)
-		instance->irq = NO_IRQ;
+	if (irq == 255 || irq == 0)
+		irq = NO_IRQ;
+	else if (irq == -1)
+		irq = IRQ_AUTO;
+
+	if (board == BOARD_HP_C2502) {
+		int *irq_table = hp_c2502_irqs;
+		int board_irq = -1;
+
+		switch (irq) {
+		case NO_IRQ:
+			board_irq = 0;
+			break;
+		case IRQ_AUTO:
+			board_irq = legacy_find_free_irq(irq_table);
+			break;
+		default:
+			while (*irq_table != -1)
+				if (*irq_table++ == irq)
+					board_irq = irq;
+		}
+
+		if (board_irq <= 0) {
+			board_irq = 0;
+			irq = NO_IRQ;
+		}
+
+		magic_configure(port_idx, board_irq, magic);
+	}
+
+	if (irq == IRQ_AUTO) {
+		instance->irq = g_NCR5380_probe_irq(instance);
+		if (instance->irq == NO_IRQ)
+			shost_printk(KERN_INFO, instance, "no irq detected\n");
+	} else {
+		instance->irq = irq;
+		if (instance->irq == NO_IRQ)
+			shost_printk(KERN_INFO, instance, "no irq provided\n");
+	}
 
 	if (instance->irq != NO_IRQ) {
-		/* set IRQ for HP C2502 */
-		if (board == BOARD_HP_C2502)
-			magic_configure(port_idx, instance->irq, magic);
 		if (request_irq(instance->irq, generic_NCR5380_intr,
 				0, "NCR5380", instance)) {
-			printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
 			instance->irq = NO_IRQ;
+			shost_printk(KERN_INFO, instance,
+			             "irq %d denied\n", instance->irq);
+		} else {
+			shost_printk(KERN_INFO, instance,
+			             "irq %d acquired\n", instance->irq);
 		}
 	}
 
-	if (instance->irq == NO_IRQ) {
-		printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
-		printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
-	}
-
 	ret = scsi_add_host(instance, pdev);
 	if (ret)
 		goto out_free_irq;
@@ -597,7 +704,7 @@ static int __init generic_NCR5380_init(void)
 	int ret = 0;
 
 	/* compatibility with old-style parameters */
-	if (irq[0] == 0 && base[0] == 0 && card[0] == -1) {
+	if (irq[0] == -1 && base[0] == 0 && card[0] == -1) {
 		irq[0] = ncr_irq;
 		base[0] = ncr_addr;
 		if (ncr_5380)

drivers/scsi/g_NCR5380.h

@@ -51,4 +51,6 @@
 #define BOARD_DTC3181E	3
 #define BOARD_HP_C2502	4
 
+#define IRQ_AUTO	254
+
 #endif /* GENERIC_NCR5380_H */

drivers/scsi/hpsa.c

@@ -1557,10 +1557,9 @@ static void hpsa_monitor_offline_device(struct ctlr_info *h,
 
 	/* Device is not on the list, add it. */
 	device = kmalloc(sizeof(*device), GFP_KERNEL);
-	if (!device) {
-		dev_warn(&h->pdev->dev, "out of memory in %s\n", __func__);
+	if (!device)
 		return;
-	}
+
 	memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
 	spin_lock_irqsave(&h->offline_device_lock, flags);
 	list_add_tail(&device->offline_list, &h->offline_device_list);
@@ -2142,17 +2141,15 @@ static int hpsa_alloc_sg_chain_blocks(struct ctlr_info *h)
 
 	h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
 				GFP_KERNEL);
-	if (!h->cmd_sg_list) {
-		dev_err(&h->pdev->dev, "Failed to allocate SG list\n");
+	if (!h->cmd_sg_list)
 		return -ENOMEM;
-	}
+
 	for (i = 0; i < h->nr_cmds; i++) {
 		h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
 						h->chainsize, GFP_KERNEL);
-		if (!h->cmd_sg_list[i]) {
-			dev_err(&h->pdev->dev, "Failed to allocate cmd SG\n");
+		if (!h->cmd_sg_list[i])
 			goto clean;
-		}
+
 	}
 	return 0;
 
@@ -3454,11 +3451,8 @@ static void hpsa_get_sas_address(struct ctlr_info *h, unsigned char *scsi3addr,
 		struct bmic_sense_subsystem_info *ssi;
 
 		ssi = kzalloc(sizeof(*ssi), GFP_KERNEL);
-		if (ssi == NULL) {
-			dev_warn(&h->pdev->dev,
-				"%s: out of memory\n", __func__);
+		if (!ssi)
 			return;
-		}
 
 		rc = hpsa_bmic_sense_subsystem_information(h,
 					scsi3addr, 0, ssi, sizeof(*ssi));
@@ -4335,8 +4329,6 @@ static void hpsa_update_scsi_devices(struct ctlr_info *h)
 
 		currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
 		if (!currentsd[i]) {
-			dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
-				__FILE__, __LINE__);
 			h->drv_req_rescan = 1;
 			goto out;
 		}
@@ -8597,14 +8589,12 @@ static int hpsa_luns_changed(struct ctlr_info *h)
 	 */
 
 	if (!h->lastlogicals)
-		goto out;
+		return rc;
 
 	logdev = kzalloc(sizeof(*logdev), GFP_KERNEL);
-	if (!logdev) {
-		dev_warn(&h->pdev->dev,
-			"Out of memory, can't track lun changes.\n");
-		goto out;
-	}
+	if (!logdev)
+		return rc;
+
 	if (hpsa_scsi_do_report_luns(h, 1, logdev, sizeof(*logdev), 0)) {
 		dev_warn(&h->pdev->dev,
 			"report luns failed, can't track lun changes.\n");
@@ -8998,11 +8988,8 @@ static void hpsa_disable_rld_caching(struct ctlr_info *h)
 		return;
 
 	options = kzalloc(sizeof(*options), GFP_KERNEL);
-	if (!options) {
-		dev_err(&h->pdev->dev,
-			"Error: failed to disable rld caching, during alloc.\n");
+	if (!options)
 		return;
-	}
 
 	c = cmd_alloc(h);
 

drivers/scsi/ibmvscsi/ibmvscsi.c

@@ -95,6 +95,7 @@ static int fast_fail = 1;
 static int client_reserve = 1;
 static char partition_name[97] = "UNKNOWN";
 static unsigned int partition_number = -1;
+static LIST_HEAD(ibmvscsi_head);
 
 static struct scsi_transport_template *ibmvscsi_transport_template;
 
@@ -232,6 +233,7 @@ static void ibmvscsi_task(void *data)
 		while ((crq = crq_queue_next_crq(&hostdata->queue)) != NULL) {
 			ibmvscsi_handle_crq(crq, hostdata);
 			crq->valid = VIOSRP_CRQ_FREE;
+			wmb();
 		}
 
 		vio_enable_interrupts(vdev);
@@ -240,6 +242,7 @@ static void ibmvscsi_task(void *data)
 			vio_disable_interrupts(vdev);
 			ibmvscsi_handle_crq(crq, hostdata);
 			crq->valid = VIOSRP_CRQ_FREE;
+			wmb();
 		} else {
 			done = 1;
 		}
@@ -992,7 +995,7 @@ static void handle_cmd_rsp(struct srp_event_struct *evt_struct)
 	if (unlikely(rsp->opcode != SRP_RSP)) {
 		if (printk_ratelimit())
 			dev_warn(evt_struct->hostdata->dev,
-				 "bad SRP RSP type %d\n", rsp->opcode);
+				 "bad SRP RSP type %#02x\n", rsp->opcode);
 	}
 	
 	if (cmnd) {
@@ -2270,6 +2273,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 	}
 
 	dev_set_drvdata(&vdev->dev, hostdata);
+	list_add_tail(&hostdata->host_list, &ibmvscsi_head);
 	return 0;
 
       add_srp_port_failed:
@@ -2291,6 +2295,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 static int ibmvscsi_remove(struct vio_dev *vdev)
 {
 	struct ibmvscsi_host_data *hostdata = dev_get_drvdata(&vdev->dev);
+	list_del(&hostdata->host_list);
 	unmap_persist_bufs(hostdata);
 	release_event_pool(&hostdata->pool, hostdata);
 	ibmvscsi_release_crq_queue(&hostdata->queue, hostdata,

drivers/scsi/ibmvscsi/ibmvscsi.h

@@ -90,6 +90,7 @@ struct event_pool {
 
 /* all driver data associated with a host adapter */
 struct ibmvscsi_host_data {
+	struct list_head host_list;
 	atomic_t request_limit;
 	int client_migrated;
 	int reset_crq;

drivers/scsi/mpt3sas/mpt3sas_base.h

@@ -402,6 +402,9 @@ struct MPT3SAS_DEVICE {
 	u8	block;
 	u8	tlr_snoop_check;
 	u8	ignore_delay_remove;
+	/* Iopriority Command Handling */
+	u8	ncq_prio_enable;
+
 };
 
 #define MPT3_CMD_NOT_USED	0x8000	/* free */
@@ -1458,4 +1461,7 @@ mpt3sas_setup_direct_io(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
 	struct _raid_device *raid_device, Mpi2SCSIIORequest_t *mpi_request,
 	u16 smid);
 
+/* NCQ Prio Handling Check */
+bool scsih_ncq_prio_supp(struct scsi_device *sdev);
+
 #endif /* MPT3SAS_BASE_H_INCLUDED */

drivers/scsi/mpt3sas/mpt3sas_ctl.c

@@ -3325,8 +3325,6 @@ static DEVICE_ATTR(diag_trigger_mpi, S_IRUGO | S_IWUSR,
 
 /*********** diagnostic trigger suppport *** END ****************************/
 
-
-
 /*****************************************/
 
 struct device_attribute *mpt3sas_host_attrs[] = {
@@ -3402,9 +3400,50 @@ _ctl_device_handle_show(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR(sas_device_handle, S_IRUGO, _ctl_device_handle_show, NULL);
 
+/**
+ * _ctl_device_ncq_io_prio_show - send prioritized io commands to device
+ * @dev - pointer to embedded device
+ * @buf - the buffer returned
+ *
+ * A sysfs 'read/write' sdev attribute, only works with SATA
+ */
+static ssize_t
+_ctl_device_ncq_prio_enable_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct scsi_device *sdev = to_scsi_device(dev);
+	struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			sas_device_priv_data->ncq_prio_enable);
+}
+
+static ssize_t
+_ctl_device_ncq_prio_enable_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct scsi_device *sdev = to_scsi_device(dev);
+	struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
+	bool ncq_prio_enable = 0;
+
+	if (kstrtobool(buf, &ncq_prio_enable))
+		return -EINVAL;
+
+	if (!scsih_ncq_prio_supp(sdev))
+		return -EINVAL;
+
+	sas_device_priv_data->ncq_prio_enable = ncq_prio_enable;
+	return strlen(buf);
+}
+static DEVICE_ATTR(sas_ncq_prio_enable, S_IRUGO | S_IWUSR,
+		   _ctl_device_ncq_prio_enable_show,
+		   _ctl_device_ncq_prio_enable_store);
+
 struct device_attribute *mpt3sas_dev_attrs[] = {
 	&dev_attr_sas_address,
 	&dev_attr_sas_device_handle,
+	&dev_attr_sas_ncq_prio_enable,
 	NULL,
 };
 

drivers/scsi/mpt3sas/mpt3sas_scsih.c

@@ -4053,6 +4053,8 @@ scsih_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
 	struct MPT3SAS_DEVICE *sas_device_priv_data;
 	struct MPT3SAS_TARGET *sas_target_priv_data;
 	struct _raid_device *raid_device;
+	struct request *rq = scmd->request;
+	int class;
 	Mpi2SCSIIORequest_t *mpi_request;
 	u32 mpi_control;
 	u16 smid;
@@ -4115,7 +4117,12 @@ scsih_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
 
 	/* set tags */
 	mpi_control |= MPI2_SCSIIO_CONTROL_SIMPLEQ;
-
+	/* NCQ Prio supported, make sure control indicated high priority */
+	if (sas_device_priv_data->ncq_prio_enable) {
+		class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
+		if (class == IOPRIO_CLASS_RT)
+			mpi_control |= 1 << MPI2_SCSIIO_CONTROL_CMDPRI_SHIFT;
+	}
 	/* Make sure Device is not raid volume.
 	 * We do not expose raid functionality to upper layer for warpdrive.
 	 */
@@ -9099,6 +9106,31 @@ scsih_pci_mmio_enabled(struct pci_dev *pdev)
 	return PCI_ERS_RESULT_RECOVERED;
 }
 
+/**
+ * scsih__ncq_prio_supp - Check for NCQ command priority support
+ * @sdev: scsi device struct
+ *
+ * This is called when a user indicates they would like to enable
+ * ncq command priorities. This works only on SATA devices.
+ */
+bool scsih_ncq_prio_supp(struct scsi_device *sdev)
+{
+	unsigned char *buf;
+	bool ncq_prio_supp = false;
+
+	if (!scsi_device_supports_vpd(sdev))
+		return ncq_prio_supp;
+
+	buf = kmalloc(SCSI_VPD_PG_LEN, GFP_KERNEL);
+	if (!buf)
+		return ncq_prio_supp;
+
+	if (!scsi_get_vpd_page(sdev, 0x89, buf, SCSI_VPD_PG_LEN))
+		ncq_prio_supp = (buf[213] >> 4) & 1;
+
+	kfree(buf);
+	return ncq_prio_supp;
+}
 /*
  * The pci device ids are defined in mpi/mpi2_cnfg.h.
  */

drivers/scsi/qedi/Kconfig

@@ -0,0 +1,10 @@
+config QEDI
+	tristate "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver Support"
+	depends on PCI && SCSI
+	depends on QED
+	select SCSI_ISCSI_ATTRS
+	select QED_LL2
+	select QED_ISCSI
+	---help---
+	This driver supports iSCSI offload for the QLogic FastLinQ
+	41000 Series Converged Network Adapters.

drivers/scsi/qedi/Makefile

@@ -0,0 +1,5 @@
+obj-$(CONFIG_QEDI) := qedi.o
+qedi-y := qedi_main.o qedi_iscsi.o qedi_fw.o qedi_sysfs.o \
+	    qedi_dbg.o
+
+qedi-$(CONFIG_DEBUG_FS) += qedi_debugfs.o

drivers/scsi/qedi/qedi.h

@@ -0,0 +1,364 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#ifndef _QEDI_H_
+#define _QEDI_H_
+
+#define __PREVENT_QED_HSI__
+
+#include <scsi/scsi_transport_iscsi.h>
+#include <scsi/libiscsi.h>
+#include <scsi/scsi_host.h>
+#include <linux/uio_driver.h>
+
+#include "qedi_hsi.h"
+#include <linux/qed/qed_if.h>
+#include "qedi_dbg.h"
+#include <linux/qed/qed_iscsi_if.h>
+#include <linux/qed/qed_ll2_if.h>
+#include "qedi_version.h"
+
+#define QEDI_MODULE_NAME		"qedi"
+
+struct qedi_endpoint;
+
+/*
+ * PCI function probe defines
+ */
+#define QEDI_MODE_NORMAL	0
+#define QEDI_MODE_RECOVERY	1
+
+#define ISCSI_WQE_SET_PTU_INVALIDATE	1
+#define QEDI_MAX_ISCSI_TASK		4096
+#define QEDI_MAX_TASK_NUM		0x0FFF
+#define QEDI_MAX_ISCSI_CONNS_PER_HBA	1024
+#define QEDI_ISCSI_MAX_BDS_PER_CMD	256	/* Firmware max BDs is 256 */
+#define MAX_OUSTANDING_TASKS_PER_CON	1024
+
+#define QEDI_MAX_BD_LEN		0xffff
+#define QEDI_BD_SPLIT_SZ	0x1000
+#define QEDI_PAGE_SIZE		4096
+#define QEDI_FAST_SGE_COUNT	4
+/* MAX Length for cached SGL */
+#define MAX_SGLEN_FOR_CACHESGL	((1U << 16) - 1)
+
+#define MAX_NUM_MSIX_PF         8
+#define MIN_NUM_CPUS_MSIX(x)	min((x)->msix_count, num_online_cpus())
+
+#define QEDI_LOCAL_PORT_MIN     60000
+#define QEDI_LOCAL_PORT_MAX     61024
+#define QEDI_LOCAL_PORT_RANGE   (QEDI_LOCAL_PORT_MAX - QEDI_LOCAL_PORT_MIN)
+#define QEDI_LOCAL_PORT_INVALID	0xffff
+#define TX_RX_RING		16
+#define RX_RING			(TX_RX_RING - 1)
+#define LL2_SINGLE_BUF_SIZE	0x400
+#define QEDI_PAGE_SIZE		4096
+#define QEDI_PAGE_ALIGN(addr)	ALIGN(addr, QEDI_PAGE_SIZE)
+#define QEDI_PAGE_MASK		(~((QEDI_PAGE_SIZE) - 1))
+
+#define QEDI_PAGE_SIZE		4096
+#define QEDI_PATH_HANDLE	0xFE0000000UL
+
+struct qedi_uio_ctrl {
+	/* meta data */
+	u32 uio_hsi_version;
+
+	/* user writes */
+	u32 host_tx_prod;
+	u32 host_rx_cons;
+	u32 host_rx_bd_cons;
+	u32 host_tx_pkt_len;
+	u32 host_rx_cons_cnt;
+
+	/* driver writes */
+	u32 hw_tx_cons;
+	u32 hw_rx_prod;
+	u32 hw_rx_bd_prod;
+	u32 hw_rx_prod_cnt;
+
+	/* other */
+	u8 mac_addr[6];
+	u8 reserve[2];
+};
+
+struct qedi_rx_bd {
+	u32 rx_pkt_index;
+	u32 rx_pkt_len;
+	u16 vlan_id;
+};
+
+#define QEDI_RX_DESC_CNT	(QEDI_PAGE_SIZE / sizeof(struct qedi_rx_bd))
+#define QEDI_MAX_RX_DESC_CNT	(QEDI_RX_DESC_CNT - 1)
+#define QEDI_NUM_RX_BD		(QEDI_RX_DESC_CNT * 1)
+#define QEDI_MAX_RX_BD		(QEDI_NUM_RX_BD - 1)
+
+#define QEDI_NEXT_RX_IDX(x)	((((x) & (QEDI_MAX_RX_DESC_CNT)) ==	\
+				  (QEDI_MAX_RX_DESC_CNT - 1)) ?		\
+				 (x) + 2 : (x) + 1)
+
+struct qedi_uio_dev {
+	struct uio_info		qedi_uinfo;
+	u32			uio_dev;
+	struct list_head	list;
+
+	u32			ll2_ring_size;
+	void			*ll2_ring;
+
+	u32			ll2_buf_size;
+	void			*ll2_buf;
+
+	void			*rx_pkt;
+	void			*tx_pkt;
+
+	struct qedi_ctx		*qedi;
+	struct pci_dev		*pdev;
+	void			*uctrl;
+};
+
+/* List to maintain the skb pointers */
+struct skb_work_list {
+	struct list_head list;
+	struct sk_buff *skb;
+	u16 vlan_id;
+};
+
+/* Queue sizes in number of elements */
+#define QEDI_SQ_SIZE		MAX_OUSTANDING_TASKS_PER_CON
+#define QEDI_CQ_SIZE		2048
+#define QEDI_CMDQ_SIZE		QEDI_MAX_ISCSI_TASK
+#define QEDI_PROTO_CQ_PROD_IDX	0
+
+struct qedi_glbl_q_params {
+	u64 hw_p_cq;	/* Completion queue PBL */
+	u64 hw_p_rq;	/* Request queue PBL */
+	u64 hw_p_cmdq;	/* Command queue PBL */
+};
+
+struct global_queue {
+	union iscsi_cqe *cq;
+	dma_addr_t cq_dma;
+	u32 cq_mem_size;
+	u32 cq_cons_idx; /* Completion queue consumer index */
+
+	void *cq_pbl;
+	dma_addr_t cq_pbl_dma;
+	u32 cq_pbl_size;
+
+};
+
+struct qedi_fastpath {
+	struct qed_sb_info	*sb_info;
+	u16			sb_id;
+#define QEDI_NAME_SIZE		16
+	char			name[QEDI_NAME_SIZE];
+	struct qedi_ctx         *qedi;
+};
+
+/* Used to pass fastpath information needed to process CQEs */
+struct qedi_io_work {
+	struct list_head list;
+	struct iscsi_cqe_solicited cqe;
+	u16	que_idx;
+};
+
+/**
+ * struct iscsi_cid_queue - Per adapter iscsi cid queue
+ *
+ * @cid_que_base:           queue base memory
+ * @cid_que:                queue memory pointer
+ * @cid_q_prod_idx:         produce index
+ * @cid_q_cons_idx:         consumer index
+ * @cid_q_max_idx:          max index. used to detect wrap around condition
+ * @cid_free_cnt:           queue size
+ * @conn_cid_tbl:           iscsi cid to conn structure mapping table
+ *
+ * Per adapter iSCSI CID Queue
+ */
+struct iscsi_cid_queue {
+	void *cid_que_base;
+	u32 *cid_que;
+	u32 cid_q_prod_idx;
+	u32 cid_q_cons_idx;
+	u32 cid_q_max_idx;
+	u32 cid_free_cnt;
+	struct qedi_conn **conn_cid_tbl;
+};
+
+struct qedi_portid_tbl {
+	spinlock_t      lock;	/* Port id lock */
+	u16             start;
+	u16             max;
+	u16             next;
+	unsigned long   *table;
+};
+
+struct qedi_itt_map {
+	__le32	itt;
+	struct qedi_cmd *p_cmd;
+};
+
+/* I/O tracing entry */
+#define QEDI_IO_TRACE_SIZE             2048
+struct qedi_io_log {
+#define QEDI_IO_TRACE_REQ              0
+#define QEDI_IO_TRACE_RSP              1
+	u8 direction;
+	u16 task_id;
+	u32 cid;
+	u32 port_id;	/* Remote port fabric ID */
+	int lun;
+	u8 op;		/* SCSI CDB */
+	u8 lba[4];
+	unsigned int bufflen;	/* SCSI buffer length */
+	unsigned int sg_count;	/* Number of SG elements */
+	u8 fast_sgs;		/* number of fast sgls */
+	u8 slow_sgs;		/* number of slow sgls */
+	u8 cached_sgs;		/* number of cached sgls */
+	int result;		/* Result passed back to mid-layer */
+	unsigned long jiffies;	/* Time stamp when I/O logged */
+	int refcount;		/* Reference count for task id */
+	unsigned int blk_req_cpu; /* CPU that the task is queued on by
+				   * blk layer
+				   */
+	unsigned int req_cpu;	/* CPU that the task is queued on */
+	unsigned int intr_cpu;	/* Interrupt CPU that the task is received on */
+	unsigned int blk_rsp_cpu;/* CPU that task is actually processed and
+				  * returned to blk layer
+				  */
+	bool cached_sge;
+	bool slow_sge;
+	bool fast_sge;
+};
+
+/* Number of entries in BDQ */
+#define QEDI_BDQ_NUM		256
+#define QEDI_BDQ_BUF_SIZE	256
+
+/* DMA coherent buffers for BDQ */
+struct qedi_bdq_buf {
+	void *buf_addr;
+	dma_addr_t buf_dma;
+};
+
+/* Main port level struct */
+struct qedi_ctx {
+	struct qedi_dbg_ctx dbg_ctx;
+	struct Scsi_Host *shost;
+	struct pci_dev *pdev;
+	struct qed_dev *cdev;
+	struct qed_dev_iscsi_info dev_info;
+	struct qed_int_info int_info;
+	struct qedi_glbl_q_params *p_cpuq;
+	struct global_queue **global_queues;
+	/* uio declaration */
+	struct qedi_uio_dev *udev;
+	struct list_head ll2_skb_list;
+	spinlock_t ll2_lock;	/* Light L2 lock */
+	spinlock_t hba_lock;	/* per port lock */
+	struct task_struct *ll2_recv_thread;
+	unsigned long flags;
+#define UIO_DEV_OPENED		1
+#define QEDI_IOTHREAD_WAKE	2
+#define QEDI_IN_RECOVERY	5
+#define QEDI_IN_OFFLINE		6
+
+	u8 mac[ETH_ALEN];
+	u32 src_ip[4];
+	u8 ip_type;
+
+	/* Physical address of above array */
+	dma_addr_t hw_p_cpuq;
+
+	struct qedi_bdq_buf bdq[QEDI_BDQ_NUM];
+	void *bdq_pbl;
+	dma_addr_t bdq_pbl_dma;
+	size_t bdq_pbl_mem_size;
+	void *bdq_pbl_list;
+	dma_addr_t bdq_pbl_list_dma;
+	u8 bdq_pbl_list_num_entries;
+	void __iomem *bdq_primary_prod;
+	void __iomem *bdq_secondary_prod;
+	u16 bdq_prod_idx;
+	u16 rq_num_entries;
+
+	u32 msix_count;
+	u32 max_sqes;
+	u8 num_queues;
+	u32 max_active_conns;
+
+	struct iscsi_cid_queue cid_que;
+	struct qedi_endpoint **ep_tbl;
+	struct qedi_portid_tbl lcl_port_tbl;
+
+	/* Rx fast path intr context */
+	struct qed_sb_info	*sb_array;
+	struct qedi_fastpath	*fp_array;
+	struct qed_iscsi_tid	tasks;
+
+#define QEDI_LINK_DOWN		0
+#define QEDI_LINK_UP		1
+	atomic_t link_state;
+
+#define QEDI_RESERVE_TASK_ID	0
+#define MAX_ISCSI_TASK_ENTRIES	4096
+#define QEDI_INVALID_TASK_ID	(MAX_ISCSI_TASK_ENTRIES + 1)
+	unsigned long task_idx_map[MAX_ISCSI_TASK_ENTRIES / BITS_PER_LONG];
+	struct qedi_itt_map *itt_map;
+	u16 tid_reuse_count[QEDI_MAX_ISCSI_TASK];
+	struct qed_pf_params pf_params;
+
+	struct workqueue_struct *tmf_thread;
+	struct workqueue_struct *offload_thread;
+
+	u16 ll2_mtu;
+
+	struct workqueue_struct *dpc_wq;
+
+	spinlock_t task_idx_lock;	/* To protect gbl context */
+	s32 last_tidx_alloc;
+	s32 last_tidx_clear;
+
+	struct qedi_io_log io_trace_buf[QEDI_IO_TRACE_SIZE];
+	spinlock_t io_trace_lock;	/* prtect trace Log buf */
+	u16 io_trace_idx;
+	unsigned int intr_cpu;
+	u32 cached_sgls;
+	bool use_cached_sge;
+	u32 slow_sgls;
+	bool use_slow_sge;
+	u32 fast_sgls;
+	bool use_fast_sge;
+
+	atomic_t num_offloads;
+};
+
+struct qedi_work {
+	struct list_head list;
+	struct qedi_ctx *qedi;
+	union iscsi_cqe cqe;
+	u16     que_idx;
+	bool is_solicited;
+};
+
+struct qedi_percpu_s {
+	struct task_struct *iothread;
+	struct list_head work_list;
+	spinlock_t p_work_lock;		/* Per cpu worker lock */
+};
+
+static inline void *qedi_get_task_mem(struct qed_iscsi_tid *info, u32 tid)
+{
+	return (info->blocks[tid / info->num_tids_per_block] +
+		(tid % info->num_tids_per_block) * info->size);
+}
+
+#define QEDI_U64_HI(val) ((u32)(((u64)(val)) >> 32))
+#define QEDI_U64_LO(val) ((u32)(((u64)(val)) & 0xffffffff))
+
+#endif /* _QEDI_H_ */

drivers/scsi/qedi/qedi_dbg.c

@@ -0,0 +1,143 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#include "qedi_dbg.h"
+#include <linux/vmalloc.h>
+
+void
+qedi_dbg_err(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+	     const char *fmt, ...)
+{
+	va_list va;
+	struct va_format vaf;
+	char nfunc[32];
+
+	memset(nfunc, 0, sizeof(nfunc));
+	memcpy(nfunc, func, sizeof(nfunc) - 1);
+
+	va_start(va, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	if (likely(qedi) && likely(qedi->pdev))
+		pr_err("[%s]:[%s:%d]:%d: %pV", dev_name(&qedi->pdev->dev),
+		       nfunc, line, qedi->host_no, &vaf);
+	else
+		pr_err("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+	va_end(va);
+}
+
+void
+qedi_dbg_warn(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+	      const char *fmt, ...)
+{
+	va_list va;
+	struct va_format vaf;
+	char nfunc[32];
+
+	memset(nfunc, 0, sizeof(nfunc));
+	memcpy(nfunc, func, sizeof(nfunc) - 1);
+
+	va_start(va, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	if (!(qedi_dbg_log & QEDI_LOG_WARN))
+		return;
+
+	if (likely(qedi) && likely(qedi->pdev))
+		pr_warn("[%s]:[%s:%d]:%d: %pV", dev_name(&qedi->pdev->dev),
+			nfunc, line, qedi->host_no, &vaf);
+	else
+		pr_warn("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+	va_end(va);
+}
+
+void
+qedi_dbg_notice(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+		const char *fmt, ...)
+{
+	va_list va;
+	struct va_format vaf;
+	char nfunc[32];
+
+	memset(nfunc, 0, sizeof(nfunc));
+	memcpy(nfunc, func, sizeof(nfunc) - 1);
+
+	va_start(va, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	if (!(qedi_dbg_log & QEDI_LOG_NOTICE))
+		return;
+
+	if (likely(qedi) && likely(qedi->pdev))
+		pr_notice("[%s]:[%s:%d]:%d: %pV",
+			  dev_name(&qedi->pdev->dev), nfunc, line,
+			  qedi->host_no, &vaf);
+	else
+		pr_notice("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+	va_end(va);
+}
+
+void
+qedi_dbg_info(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+	      u32 level, const char *fmt, ...)
+{
+	va_list va;
+	struct va_format vaf;
+	char nfunc[32];
+
+	memset(nfunc, 0, sizeof(nfunc));
+	memcpy(nfunc, func, sizeof(nfunc) - 1);
+
+	va_start(va, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &va;
+
+	if (!(qedi_dbg_log & level))
+		return;
+
+	if (likely(qedi) && likely(qedi->pdev))
+		pr_info("[%s]:[%s:%d]:%d: %pV", dev_name(&qedi->pdev->dev),
+			nfunc, line, qedi->host_no, &vaf);
+	else
+		pr_info("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf);
+
+	va_end(va);
+}
+
+int
+qedi_create_sysfs_attr(struct Scsi_Host *shost, struct sysfs_bin_attrs *iter)
+{
+	int ret = 0;
+
+	for (; iter->name; iter++) {
+		ret = sysfs_create_bin_file(&shost->shost_gendev.kobj,
+					    iter->attr);
+		if (ret)
+			pr_err("Unable to create sysfs %s attr, err(%d).\n",
+			       iter->name, ret);
+	}
+	return ret;
+}
+
+void
+qedi_remove_sysfs_attr(struct Scsi_Host *shost, struct sysfs_bin_attrs *iter)
+{
+	for (; iter->name; iter++)
+		sysfs_remove_bin_file(&shost->shost_gendev.kobj, iter->attr);
+}

drivers/scsi/qedi/qedi_dbg.h

@@ -0,0 +1,144 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#ifndef _QEDI_DBG_H_
+#define _QEDI_DBG_H_
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/compiler.h>
+#include <linux/string.h>
+#include <linux/version.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_iscsi.h>
+#include <linux/fs.h>
+
+#define __PREVENT_QED_HSI__
+#include <linux/qed/common_hsi.h>
+#include <linux/qed/qed_if.h>
+
+extern uint qedi_dbg_log;
+
+/* Debug print level definitions */
+#define QEDI_LOG_DEFAULT	0x1		/* Set default logging mask */
+#define QEDI_LOG_INFO		0x2		/* Informational logs,
+						 * MAC address, WWPN, WWNN
+						 */
+#define QEDI_LOG_DISC		0x4		/* Init, discovery, rport */
+#define QEDI_LOG_LL2		0x8		/* LL2, VLAN logs */
+#define QEDI_LOG_CONN		0x10		/* Connection setup, cleanup */
+#define QEDI_LOG_EVT		0x20		/* Events, link, mtu */
+#define QEDI_LOG_TIMER		0x40		/* Timer events */
+#define QEDI_LOG_MP_REQ		0x80		/* Middle Path (MP) logs */
+#define QEDI_LOG_SCSI_TM	0x100		/* SCSI Aborts, Task Mgmt */
+#define QEDI_LOG_UNSOL		0x200		/* unsolicited event logs */
+#define QEDI_LOG_IO		0x400		/* scsi cmd, completion */
+#define QEDI_LOG_MQ		0x800		/* Multi Queue logs */
+#define QEDI_LOG_BSG		0x1000		/* BSG logs */
+#define QEDI_LOG_DEBUGFS	0x2000		/* debugFS logs */
+#define QEDI_LOG_LPORT		0x4000		/* lport logs */
+#define QEDI_LOG_ELS		0x8000		/* ELS logs */
+#define QEDI_LOG_NPIV		0x10000		/* NPIV logs */
+#define QEDI_LOG_SESS		0x20000		/* Conection setup, cleanup */
+#define QEDI_LOG_UIO		0x40000		/* iSCSI UIO logs */
+#define QEDI_LOG_TID		0x80000         /* FW TID context acquire,
+						 * free
+						 */
+#define QEDI_TRACK_TID		0x100000        /* Track TID state. To be
+						 * enabled only at module load
+						 * and not run-time.
+						 */
+#define QEDI_TRACK_CMD_LIST    0x300000        /* Track active cmd list nodes,
+						* done with reference to TID,
+						* hence TRACK_TID also enabled.
+						*/
+#define QEDI_LOG_NOTICE		0x40000000	/* Notice logs */
+#define QEDI_LOG_WARN		0x80000000	/* Warning logs */
+
+/* Debug context structure */
+struct qedi_dbg_ctx {
+	unsigned int host_no;
+	struct pci_dev *pdev;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *bdf_dentry;
+#endif
+};
+
+#define QEDI_ERR(pdev, fmt, ...)	\
+		qedi_dbg_err(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
+#define QEDI_WARN(pdev, fmt, ...)	\
+		qedi_dbg_warn(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
+#define QEDI_NOTICE(pdev, fmt, ...)	\
+		qedi_dbg_notice(pdev, __func__, __LINE__, fmt, ## __VA_ARGS__)
+#define QEDI_INFO(pdev, level, fmt, ...)	\
+		qedi_dbg_info(pdev, __func__, __LINE__, level, fmt,	\
+			      ## __VA_ARGS__)
+
+void qedi_dbg_err(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+		  const char *fmt, ...);
+void qedi_dbg_warn(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+		   const char *fmt, ...);
+void qedi_dbg_notice(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+		     const char *fmt, ...);
+void qedi_dbg_info(struct qedi_dbg_ctx *qedi, const char *func, u32 line,
+		   u32 info, const char *fmt, ...);
+
+struct Scsi_Host;
+
+struct sysfs_bin_attrs {
+	char *name;
+	struct bin_attribute *attr;
+};
+
+int qedi_create_sysfs_attr(struct Scsi_Host *shost,
+			   struct sysfs_bin_attrs *iter);
+void qedi_remove_sysfs_attr(struct Scsi_Host *shost,
+			    struct sysfs_bin_attrs *iter);
+
+#ifdef CONFIG_DEBUG_FS
+/* DebugFS related code */
+struct qedi_list_of_funcs {
+	char *oper_str;
+	ssize_t (*oper_func)(struct qedi_dbg_ctx *qedi);
+};
+
+struct qedi_debugfs_ops {
+	char *name;
+	struct qedi_list_of_funcs *qedi_funcs;
+};
+
+#define qedi_dbg_fileops(drv, ops) \
+{ \
+	.owner  = THIS_MODULE, \
+	.open   = simple_open, \
+	.read   = drv##_dbg_##ops##_cmd_read, \
+	.write  = drv##_dbg_##ops##_cmd_write \
+}
+
+/* Used for debugfs sequential files */
+#define qedi_dbg_fileops_seq(drv, ops) \
+{ \
+	.owner = THIS_MODULE, \
+	.open = drv##_dbg_##ops##_open, \
+	.read = seq_read, \
+	.llseek = seq_lseek, \
+	.release = single_release, \
+}
+
+void qedi_dbg_host_init(struct qedi_dbg_ctx *qedi,
+			struct qedi_debugfs_ops *dops,
+			const struct file_operations *fops);
+void qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi);
+void qedi_dbg_init(char *drv_name);
+void qedi_dbg_exit(void);
+#endif /* CONFIG_DEBUG_FS */
+
+#endif /* _QEDI_DBG_H_ */

drivers/scsi/qedi/qedi_debugfs.c

@@ -0,0 +1,244 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#include "qedi.h"
+#include "qedi_dbg.h"
+
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+#include <linux/module.h>
+
+int do_not_recover;
+static struct dentry *qedi_dbg_root;
+
+void
+qedi_dbg_host_init(struct qedi_dbg_ctx *qedi,
+		   struct qedi_debugfs_ops *dops,
+		   const struct file_operations *fops)
+{
+	char host_dirname[32];
+	struct dentry *file_dentry = NULL;
+
+	sprintf(host_dirname, "host%u", qedi->host_no);
+	qedi->bdf_dentry = debugfs_create_dir(host_dirname, qedi_dbg_root);
+	if (!qedi->bdf_dentry)
+		return;
+
+	while (dops) {
+		if (!(dops->name))
+			break;
+
+		file_dentry = debugfs_create_file(dops->name, 0600,
+						  qedi->bdf_dentry, qedi,
+						  fops);
+		if (!file_dentry) {
+			QEDI_INFO(qedi, QEDI_LOG_DEBUGFS,
+				  "Debugfs entry %s creation failed\n",
+				  dops->name);
+			debugfs_remove_recursive(qedi->bdf_dentry);
+			return;
+		}
+		dops++;
+		fops++;
+	}
+}
+
+void
+qedi_dbg_host_exit(struct qedi_dbg_ctx *qedi)
+{
+	debugfs_remove_recursive(qedi->bdf_dentry);
+	qedi->bdf_dentry = NULL;
+}
+
+void
+qedi_dbg_init(char *drv_name)
+{
+	qedi_dbg_root = debugfs_create_dir(drv_name, NULL);
+	if (!qedi_dbg_root)
+		QEDI_INFO(NULL, QEDI_LOG_DEBUGFS, "Init of debugfs failed\n");
+}
+
+void
+qedi_dbg_exit(void)
+{
+	debugfs_remove_recursive(qedi_dbg_root);
+	qedi_dbg_root = NULL;
+}
+
+static ssize_t
+qedi_dbg_do_not_recover_enable(struct qedi_dbg_ctx *qedi_dbg)
+{
+	if (!do_not_recover)
+		do_not_recover = 1;
+
+	QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
+		  do_not_recover);
+	return 0;
+}
+
+static ssize_t
+qedi_dbg_do_not_recover_disable(struct qedi_dbg_ctx *qedi_dbg)
+{
+	if (do_not_recover)
+		do_not_recover = 0;
+
+	QEDI_INFO(qedi_dbg, QEDI_LOG_DEBUGFS, "do_not_recover=%d\n",
+		  do_not_recover);
+	return 0;
+}
+
+static struct qedi_list_of_funcs qedi_dbg_do_not_recover_ops[] = {
+	{ "enable", qedi_dbg_do_not_recover_enable },
+	{ "disable", qedi_dbg_do_not_recover_disable },
+	{ NULL, NULL }
+};
+
+struct qedi_debugfs_ops qedi_debugfs_ops[] = {
+	{ "gbl_ctx", NULL },
+	{ "do_not_recover", qedi_dbg_do_not_recover_ops},
+	{ "io_trace", NULL },
+	{ NULL, NULL }
+};
+
+static ssize_t
+qedi_dbg_do_not_recover_cmd_write(struct file *filp, const char __user *buffer,
+				  size_t count, loff_t *ppos)
+{
+	size_t cnt = 0;
+	struct qedi_dbg_ctx *qedi_dbg =
+			(struct qedi_dbg_ctx *)filp->private_data;
+	struct qedi_list_of_funcs *lof = qedi_dbg_do_not_recover_ops;
+
+	if (*ppos)
+		return 0;
+
+	while (lof) {
+		if (!(lof->oper_str))
+			break;
+
+		if (!strncmp(lof->oper_str, buffer, strlen(lof->oper_str))) {
+			cnt = lof->oper_func(qedi_dbg);
+			break;
+		}
+
+		lof++;
+	}
+	return (count - cnt);
+}
+
+static ssize_t
+qedi_dbg_do_not_recover_cmd_read(struct file *filp, char __user *buffer,
+				 size_t count, loff_t *ppos)
+{
+	size_t cnt = 0;
+
+	if (*ppos)
+		return 0;
+
+	cnt = sprintf(buffer, "do_not_recover=%d\n", do_not_recover);
+	cnt = min_t(int, count, cnt - *ppos);
+	*ppos += cnt;
+	return cnt;
+}
+
+static int
+qedi_gbl_ctx_show(struct seq_file *s, void *unused)
+{
+	struct qedi_fastpath *fp = NULL;
+	struct qed_sb_info *sb_info = NULL;
+	struct status_block *sb = NULL;
+	struct global_queue *que = NULL;
+	int id;
+	u16 prod_idx;
+	struct qedi_ctx *qedi = s->private;
+	unsigned long flags;
+
+	seq_puts(s, " DUMP CQ CONTEXT:\n");
+
+	for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
+		spin_lock_irqsave(&qedi->hba_lock, flags);
+		seq_printf(s, "=========FAST CQ PATH [%d] ==========\n", id);
+		fp = &qedi->fp_array[id];
+		sb_info = fp->sb_info;
+		sb = sb_info->sb_virt;
+		prod_idx = (sb->pi_array[QEDI_PROTO_CQ_PROD_IDX] &
+			    STATUS_BLOCK_PROD_INDEX_MASK);
+		seq_printf(s, "SB PROD IDX: %d\n", prod_idx);
+		que = qedi->global_queues[fp->sb_id];
+		seq_printf(s, "DRV CONS IDX: %d\n", que->cq_cons_idx);
+		seq_printf(s, "CQ complete host memory: %d\n", fp->sb_id);
+		seq_puts(s, "=========== END ==================\n\n\n");
+		spin_unlock_irqrestore(&qedi->hba_lock, flags);
+	}
+	return 0;
+}
+
+static int
+qedi_dbg_gbl_ctx_open(struct inode *inode, struct file *file)
+{
+	struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
+	struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
+					     dbg_ctx);
+
+	return single_open(file, qedi_gbl_ctx_show, qedi);
+}
+
+static int
+qedi_io_trace_show(struct seq_file *s, void *unused)
+{
+	int id, idx = 0;
+	struct qedi_ctx *qedi = s->private;
+	struct qedi_io_log *io_log;
+	unsigned long flags;
+
+	seq_puts(s, " DUMP IO LOGS:\n");
+	spin_lock_irqsave(&qedi->io_trace_lock, flags);
+	idx = qedi->io_trace_idx;
+	for (id = 0; id < QEDI_IO_TRACE_SIZE; id++) {
+		io_log = &qedi->io_trace_buf[idx];
+		seq_printf(s, "iodir-%d:", io_log->direction);
+		seq_printf(s, "tid-0x%x:", io_log->task_id);
+		seq_printf(s, "cid-0x%x:", io_log->cid);
+		seq_printf(s, "lun-%d:", io_log->lun);
+		seq_printf(s, "op-0x%02x:", io_log->op);
+		seq_printf(s, "0x%02x%02x%02x%02x:", io_log->lba[0],
+			   io_log->lba[1], io_log->lba[2], io_log->lba[3]);
+		seq_printf(s, "buflen-%d:", io_log->bufflen);
+		seq_printf(s, "sgcnt-%d:", io_log->sg_count);
+		seq_printf(s, "res-0x%08x:", io_log->result);
+		seq_printf(s, "jif-%lu:", io_log->jiffies);
+		seq_printf(s, "blk_req_cpu-%d:", io_log->blk_req_cpu);
+		seq_printf(s, "req_cpu-%d:", io_log->req_cpu);
+		seq_printf(s, "intr_cpu-%d:", io_log->intr_cpu);
+		seq_printf(s, "blk_rsp_cpu-%d\n", io_log->blk_rsp_cpu);
+
+		idx++;
+		if (idx == QEDI_IO_TRACE_SIZE)
+			idx = 0;
+	}
+	spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
+	return 0;
+}
+
+static int
+qedi_dbg_io_trace_open(struct inode *inode, struct file *file)
+{
+	struct qedi_dbg_ctx *qedi_dbg = inode->i_private;
+	struct qedi_ctx *qedi = container_of(qedi_dbg, struct qedi_ctx,
+					     dbg_ctx);
+
+	return single_open(file, qedi_io_trace_show, qedi);
+}
+
+const struct file_operations qedi_dbg_fops[] = {
+	qedi_dbg_fileops_seq(qedi, gbl_ctx),
+	qedi_dbg_fileops(qedi, do_not_recover),
+	qedi_dbg_fileops_seq(qedi, io_trace),
+	{ NULL, NULL },
+};

drivers/scsi/qedi/qedi_fw.c

@@ -0,0 +1,2378 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#include <linux/blkdev.h>
+#include <scsi/scsi_tcq.h>
+#include <linux/delay.h>
+
+#include "qedi.h"
+#include "qedi_iscsi.h"
+#include "qedi_gbl.h"
+
+static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
+			       struct iscsi_task *mtask);
+
+void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
+{
+	struct scsi_cmnd *sc = cmd->scsi_cmd;
+
+	if (cmd->io_tbl.sge_valid && sc) {
+		cmd->io_tbl.sge_valid = 0;
+		scsi_dma_unmap(sc);
+	}
+}
+
+static void qedi_process_logout_resp(struct qedi_ctx *qedi,
+				     union iscsi_cqe *cqe,
+				     struct iscsi_task *task,
+				     struct qedi_conn *qedi_conn)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_logout_rsp *resp_hdr;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_logout_response_hdr *cqe_logout_response;
+	struct qedi_cmd *cmd;
+
+	cmd = (struct qedi_cmd *)task->dd_data;
+	cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
+	spin_lock(&session->back_lock);
+	resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
+	resp_hdr->opcode = cqe_logout_response->opcode;
+	resp_hdr->flags = cqe_logout_response->flags;
+	resp_hdr->hlength = 0;
+
+	resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
+	resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
+	resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
+	resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
+
+	resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time2wait);
+	resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time2retain);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+		  "Freeing tid=0x%x for cid=0x%x\n",
+		  cmd->task_id, qedi_conn->iscsi_conn_id);
+
+	if (likely(cmd->io_cmd_in_list)) {
+		cmd->io_cmd_in_list = false;
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	} else {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
+			  cmd->task_id, qedi_conn->iscsi_conn_id,
+			  &cmd->io_cmd);
+	}
+
+	cmd->state = RESPONSE_RECEIVED;
+	qedi_clear_task_idx(qedi, cmd->task_id);
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
+
+	spin_unlock(&session->back_lock);
+}
+
+static void qedi_process_text_resp(struct qedi_ctx *qedi,
+				   union iscsi_cqe *cqe,
+				   struct iscsi_task *task,
+				   struct qedi_conn *qedi_conn)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_task_context *task_ctx;
+	struct iscsi_text_rsp *resp_hdr_ptr;
+	struct iscsi_text_response_hdr *cqe_text_response;
+	struct qedi_cmd *cmd;
+	int pld_len;
+	u32 *tmp;
+
+	cmd = (struct qedi_cmd *)task->dd_data;
+	task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
+
+	cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
+	spin_lock(&session->back_lock);
+	resp_hdr_ptr =  (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
+	resp_hdr_ptr->opcode = cqe_text_response->opcode;
+	resp_hdr_ptr->flags = cqe_text_response->flags;
+	resp_hdr_ptr->hlength = 0;
+
+	hton24(resp_hdr_ptr->dlength,
+	       (cqe_text_response->hdr_second_dword &
+		ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
+	tmp = (u32 *)resp_hdr_ptr->dlength;
+
+	resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
+				      conn->session->age);
+	resp_hdr_ptr->ttt = cqe_text_response->ttt;
+	resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
+	resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
+	resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
+
+	pld_len = cqe_text_response->hdr_second_dword &
+		  ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
+	qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
+
+	memset(task_ctx, '\0', sizeof(*task_ctx));
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+		  "Freeing tid=0x%x for cid=0x%x\n",
+		  cmd->task_id, qedi_conn->iscsi_conn_id);
+
+	if (likely(cmd->io_cmd_in_list)) {
+		cmd->io_cmd_in_list = false;
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	} else {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
+			  cmd->task_id, qedi_conn->iscsi_conn_id,
+			  &cmd->io_cmd);
+	}
+
+	cmd->state = RESPONSE_RECEIVED;
+	qedi_clear_task_idx(qedi, cmd->task_id);
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
+			     qedi_conn->gen_pdu.resp_buf,
+			     (qedi_conn->gen_pdu.resp_wr_ptr -
+			      qedi_conn->gen_pdu.resp_buf));
+	spin_unlock(&session->back_lock);
+}
+
+static void qedi_tmf_resp_work(struct work_struct *work)
+{
+	struct qedi_cmd *qedi_cmd =
+				container_of(work, struct qedi_cmd, tmf_work);
+	struct qedi_conn *qedi_conn = qedi_cmd->conn;
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_tm_rsp *resp_hdr_ptr;
+	struct iscsi_cls_session *cls_sess;
+	int rval = 0;
+
+	set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+	resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
+	cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
+
+	iscsi_block_session(session->cls_session);
+	rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
+	if (rval) {
+		clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+		qedi_clear_task_idx(qedi, qedi_cmd->task_id);
+		iscsi_unblock_session(session->cls_session);
+		return;
+	}
+
+	iscsi_unblock_session(session->cls_session);
+	qedi_clear_task_idx(qedi, qedi_cmd->task_id);
+
+	spin_lock(&session->back_lock);
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
+	spin_unlock(&session->back_lock);
+	kfree(resp_hdr_ptr);
+	clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+}
+
+static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
+				  union iscsi_cqe *cqe,
+				  struct iscsi_task *task,
+				  struct qedi_conn *qedi_conn)
+
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_tmf_response_hdr *cqe_tmp_response;
+	struct iscsi_tm_rsp *resp_hdr_ptr;
+	struct iscsi_tm *tmf_hdr;
+	struct qedi_cmd *qedi_cmd = NULL;
+	u32 *tmp;
+
+	cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
+
+	qedi_cmd = task->dd_data;
+	qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_KERNEL);
+	if (!qedi_cmd->tmf_resp_buf) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failed to allocate resp buf, cid=0x%x\n",
+			  qedi_conn->iscsi_conn_id);
+		return;
+	}
+
+	spin_lock(&session->back_lock);
+	resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
+	memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
+
+	/* Fill up the header */
+	resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
+	resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
+	resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
+	resp_hdr_ptr->hlength = 0;
+
+	hton24(resp_hdr_ptr->dlength,
+	       (cqe_tmp_response->hdr_second_dword &
+		ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
+	tmp = (u32 *)resp_hdr_ptr->dlength;
+	resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
+				      conn->session->age);
+	resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
+	resp_hdr_ptr->exp_cmdsn  = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
+	resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
+
+	tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
+
+	if (likely(qedi_cmd->io_cmd_in_list)) {
+		qedi_cmd->io_cmd_in_list = false;
+		list_del_init(&qedi_cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	}
+
+	if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	      ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
+	    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	      ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
+	    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	      ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
+		INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
+		queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
+		goto unblock_sess;
+	}
+
+	qedi_clear_task_idx(qedi, qedi_cmd->task_id);
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
+	kfree(resp_hdr_ptr);
+
+unblock_sess:
+	spin_unlock(&session->back_lock);
+}
+
+static void qedi_process_login_resp(struct qedi_ctx *qedi,
+				    union iscsi_cqe *cqe,
+				    struct iscsi_task *task,
+				    struct qedi_conn *qedi_conn)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_task_context *task_ctx;
+	struct iscsi_login_rsp *resp_hdr_ptr;
+	struct iscsi_login_response_hdr *cqe_login_response;
+	struct qedi_cmd *cmd;
+	int pld_len;
+	u32 *tmp;
+
+	cmd = (struct qedi_cmd *)task->dd_data;
+
+	cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
+	task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
+
+	spin_lock(&session->back_lock);
+	resp_hdr_ptr =  (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
+	resp_hdr_ptr->opcode = cqe_login_response->opcode;
+	resp_hdr_ptr->flags = cqe_login_response->flags_attr;
+	resp_hdr_ptr->hlength = 0;
+
+	hton24(resp_hdr_ptr->dlength,
+	       (cqe_login_response->hdr_second_dword &
+		ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
+	tmp = (u32 *)resp_hdr_ptr->dlength;
+	resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
+				      conn->session->age);
+	resp_hdr_ptr->tsih = cqe_login_response->tsih;
+	resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
+	resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
+	resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
+	resp_hdr_ptr->status_class = cqe_login_response->status_class;
+	resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
+	pld_len = cqe_login_response->hdr_second_dword &
+		  ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
+	qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
+
+	if (likely(cmd->io_cmd_in_list)) {
+		cmd->io_cmd_in_list = false;
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	}
+
+	memset(task_ctx, '\0', sizeof(*task_ctx));
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
+			     qedi_conn->gen_pdu.resp_buf,
+			     (qedi_conn->gen_pdu.resp_wr_ptr -
+			     qedi_conn->gen_pdu.resp_buf));
+
+	spin_unlock(&session->back_lock);
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+		  "Freeing tid=0x%x for cid=0x%x\n",
+		  cmd->task_id, qedi_conn->iscsi_conn_id);
+	cmd->state = RESPONSE_RECEIVED;
+	qedi_clear_task_idx(qedi, cmd->task_id);
+}
+
+static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
+				struct iscsi_cqe_unsolicited *cqe,
+				char *ptr, int len)
+{
+	u16 idx = 0;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
+		  len, qedi->bdq_prod_idx,
+		  (qedi->bdq_prod_idx % qedi->rq_num_entries));
+
+	/* Obtain buffer address from rqe_opaque */
+	idx = cqe->rqe_opaque.lo;
+	if ((idx < 0) || (idx > (QEDI_BDQ_NUM - 1))) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
+			  idx);
+		return;
+	}
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "rqe_opaque.lo [0x%p], rqe_opaque.hi [0x%p], idx [%d]\n",
+		  cqe->rqe_opaque.lo, cqe->rqe_opaque.hi, idx);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
+	switch (cqe->unsol_cqe_type) {
+	case ISCSI_CQE_UNSOLICITED_SINGLE:
+	case ISCSI_CQE_UNSOLICITED_FIRST:
+		if (len)
+			memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
+		break;
+	case ISCSI_CQE_UNSOLICITED_MIDDLE:
+	case ISCSI_CQE_UNSOLICITED_LAST:
+		break;
+	default:
+		break;
+	}
+}
+
+static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
+				struct iscsi_cqe_unsolicited *cqe,
+				int count)
+{
+	u16 tmp;
+	u16 idx = 0;
+	struct scsi_bd *pbl;
+
+	/* Obtain buffer address from rqe_opaque */
+	idx = cqe->rqe_opaque.lo;
+	if ((idx < 0) || (idx > (QEDI_BDQ_NUM - 1))) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
+			  idx);
+		return;
+	}
+
+	pbl = (struct scsi_bd *)qedi->bdq_pbl;
+	pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
+	pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
+	pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
+		  pbl, pbl->address.hi, pbl->address.lo, idx);
+	pbl->opaque.hi = 0;
+	pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(idx));
+
+	/* Increment producer to let f/w know we've handled the frame */
+	qedi->bdq_prod_idx += count;
+
+	writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
+	tmp = readw(qedi->bdq_primary_prod);
+
+	writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
+	tmp = readw(qedi->bdq_secondary_prod);
+}
+
+static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
+				      struct iscsi_cqe_unsolicited *cqe,
+				      u32 pdu_len, u32 num_bdqs,
+				      char *bdq_data)
+{
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "num_bdqs [%d]\n", num_bdqs);
+
+	qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
+	qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
+}
+
+static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
+				   union iscsi_cqe *cqe,
+				   struct iscsi_task *task,
+				   struct qedi_conn *qedi_conn, u16 que_idx)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_nop_in_hdr *cqe_nop_in;
+	struct iscsi_nopin *hdr;
+	struct qedi_cmd *cmd;
+	int tgt_async_nop = 0;
+	u32 lun[2];
+	u32 pdu_len, num_bdqs;
+	char bdq_data[QEDI_BDQ_BUF_SIZE];
+	unsigned long flags;
+
+	spin_lock_bh(&session->back_lock);
+	cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
+
+	pdu_len = cqe_nop_in->hdr_second_dword &
+		  ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
+	num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
+
+	hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(hdr, 0, sizeof(struct iscsi_hdr));
+	hdr->opcode = cqe_nop_in->opcode;
+	hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
+	hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
+	hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
+	hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
+
+	if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
+		spin_lock_irqsave(&qedi->hba_lock, flags);
+		qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
+					  pdu_len, num_bdqs, bdq_data);
+		hdr->itt = RESERVED_ITT;
+		tgt_async_nop = 1;
+		spin_unlock_irqrestore(&qedi->hba_lock, flags);
+		goto done;
+	}
+
+	/* Response to one of our nop-outs */
+	if (task) {
+		cmd = task->dd_data;
+		hdr->flags = ISCSI_FLAG_CMD_FINAL;
+		hdr->itt = build_itt(cqe->cqe_solicited.itid,
+				     conn->session->age);
+		lun[0] = 0xffffffff;
+		lun[1] = 0xffffffff;
+		memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+			  "Freeing tid=0x%x for cid=0x%x\n",
+			  cmd->task_id, qedi_conn->iscsi_conn_id);
+		cmd->state = RESPONSE_RECEIVED;
+		spin_lock(&qedi_conn->list_lock);
+		if (likely(cmd->io_cmd_in_list)) {
+			cmd->io_cmd_in_list = false;
+			list_del_init(&cmd->io_cmd);
+			qedi_conn->active_cmd_count--;
+		}
+
+		spin_unlock(&qedi_conn->list_lock);
+		qedi_clear_task_idx(qedi, cmd->task_id);
+	}
+
+done:
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
+
+	spin_unlock_bh(&session->back_lock);
+	return tgt_async_nop;
+}
+
+static void qedi_process_async_mesg(struct qedi_ctx *qedi,
+				    union iscsi_cqe *cqe,
+				    struct iscsi_task *task,
+				    struct qedi_conn *qedi_conn,
+				    u16 que_idx)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_async_msg_hdr *cqe_async_msg;
+	struct iscsi_async *resp_hdr;
+	u32 lun[2];
+	u32 pdu_len, num_bdqs;
+	char bdq_data[QEDI_BDQ_BUF_SIZE];
+	unsigned long flags;
+
+	spin_lock_bh(&session->back_lock);
+
+	cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
+	pdu_len = cqe_async_msg->hdr_second_dword &
+		ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
+	num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
+
+	if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
+		spin_lock_irqsave(&qedi->hba_lock, flags);
+		qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
+					  pdu_len, num_bdqs, bdq_data);
+		spin_unlock_irqrestore(&qedi->hba_lock, flags);
+	}
+
+	resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
+	resp_hdr->opcode = cqe_async_msg->opcode;
+	resp_hdr->flags = 0x80;
+
+	lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
+	lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
+	memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
+	resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
+	resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
+	resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
+
+	resp_hdr->async_event = cqe_async_msg->async_event;
+	resp_hdr->async_vcode = cqe_async_msg->async_vcode;
+
+	resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
+	resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
+	resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
+			     pdu_len);
+
+	spin_unlock_bh(&session->back_lock);
+}
+
+static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
+				     union iscsi_cqe *cqe,
+				     struct iscsi_task *task,
+				     struct qedi_conn *qedi_conn,
+				     uint16_t que_idx)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_reject_hdr *cqe_reject;
+	struct iscsi_reject *hdr;
+	u32 pld_len, num_bdqs;
+	unsigned long flags;
+
+	spin_lock_bh(&session->back_lock);
+	cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
+	pld_len = cqe_reject->hdr_second_dword &
+		  ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
+	num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
+
+	if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
+		spin_lock_irqsave(&qedi->hba_lock, flags);
+		qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
+					  pld_len, num_bdqs, conn->data);
+		spin_unlock_irqrestore(&qedi->hba_lock, flags);
+	}
+	hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
+	memset(hdr, 0, sizeof(struct iscsi_hdr));
+	hdr->opcode = cqe_reject->opcode;
+	hdr->reason = cqe_reject->hdr_reason;
+	hdr->flags = cqe_reject->hdr_flags;
+	hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
+			      ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
+	hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
+	hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
+	hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
+	hdr->ffffffff = cpu_to_be32(0xffffffff);
+
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
+			     conn->data, pld_len);
+	spin_unlock_bh(&session->back_lock);
+}
+
+static void qedi_scsi_completion(struct qedi_ctx *qedi,
+				 union iscsi_cqe *cqe,
+				 struct iscsi_task *task,
+				 struct iscsi_conn *conn)
+{
+	struct scsi_cmnd *sc_cmd;
+	struct qedi_cmd *cmd = task->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct iscsi_scsi_rsp *hdr;
+	struct iscsi_data_in_hdr *cqe_data_in;
+	int datalen = 0;
+	struct qedi_conn *qedi_conn;
+	u32 iscsi_cid;
+	bool mark_cmd_node_deleted = false;
+	u8 cqe_err_bits = 0;
+
+	iscsi_cid  = cqe->cqe_common.conn_id;
+	qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
+
+	cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
+	cqe_err_bits =
+		cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
+
+	spin_lock_bh(&session->back_lock);
+	/* get the scsi command */
+	sc_cmd = cmd->scsi_cmd;
+
+	if (!sc_cmd) {
+		QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
+		goto error;
+	}
+
+	if (!sc_cmd->SCp.ptr) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "SCp.ptr is NULL, returned in another context.\n");
+		goto error;
+	}
+
+	if (!sc_cmd->request) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "sc_cmd->request is NULL, sc_cmd=%p.\n",
+			  sc_cmd);
+		goto error;
+	}
+
+	if (!sc_cmd->request->special) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "request->special is NULL so request not valid, sc_cmd=%p.\n",
+			  sc_cmd);
+		goto error;
+	}
+
+	if (!sc_cmd->request->q) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "request->q is NULL so request is not valid, sc_cmd=%p.\n",
+			  sc_cmd);
+		goto error;
+	}
+
+	qedi_iscsi_unmap_sg_list(cmd);
+
+	hdr = (struct iscsi_scsi_rsp *)task->hdr;
+	hdr->opcode = cqe_data_in->opcode;
+	hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
+	hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
+	hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
+	hdr->response = cqe_data_in->reserved1;
+	hdr->cmd_status = cqe_data_in->status_rsvd;
+	hdr->flags = cqe_data_in->flags;
+	hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
+
+	if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
+		datalen = cqe_data_in->reserved2 &
+			  ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
+		memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
+	}
+
+	/* If f/w reports data underrun err then set residual to IO transfer
+	 * length, set Underrun flag and clear Overrun flag explicitly
+	 */
+	if (unlikely(cqe_err_bits &&
+		     GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
+			  hdr->itt, cqe_data_in->flags, cmd->task_id,
+			  qedi_conn->iscsi_conn_id, hdr->residual_count,
+			  scsi_bufflen(sc_cmd));
+		hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
+		hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
+		hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
+	}
+
+	spin_lock(&qedi_conn->list_lock);
+	if (likely(cmd->io_cmd_in_list)) {
+		cmd->io_cmd_in_list = false;
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+		mark_cmd_node_deleted = true;
+	}
+	spin_unlock(&qedi_conn->list_lock);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+		  "Freeing tid=0x%x for cid=0x%x\n",
+		  cmd->task_id, qedi_conn->iscsi_conn_id);
+	cmd->state = RESPONSE_RECEIVED;
+	if (qedi_io_tracing)
+		qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
+
+	qedi_clear_task_idx(qedi, cmd->task_id);
+	__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
+			     conn->data, datalen);
+error:
+	spin_unlock_bh(&session->back_lock);
+}
+
+static void qedi_mtask_completion(struct qedi_ctx *qedi,
+				  union iscsi_cqe *cqe,
+				  struct iscsi_task *task,
+				  struct qedi_conn *conn, uint16_t que_idx)
+{
+	struct iscsi_conn *iscsi_conn;
+	u32 hdr_opcode;
+
+	hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
+	iscsi_conn = conn->cls_conn->dd_data;
+
+	switch (hdr_opcode) {
+	case ISCSI_OPCODE_SCSI_RESPONSE:
+	case ISCSI_OPCODE_DATA_IN:
+		qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
+		break;
+	case ISCSI_OPCODE_LOGIN_RESPONSE:
+		qedi_process_login_resp(qedi, cqe, task, conn);
+		break;
+	case ISCSI_OPCODE_TMF_RESPONSE:
+		qedi_process_tmf_resp(qedi, cqe, task, conn);
+		break;
+	case ISCSI_OPCODE_TEXT_RESPONSE:
+		qedi_process_text_resp(qedi, cqe, task, conn);
+		break;
+	case ISCSI_OPCODE_LOGOUT_RESPONSE:
+		qedi_process_logout_resp(qedi, cqe, task, conn);
+		break;
+	case ISCSI_OPCODE_NOP_IN:
+		qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
+		break;
+	default:
+		QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
+	}
+}
+
+static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
+					  struct iscsi_cqe_solicited *cqe,
+					  struct iscsi_task *task,
+					  struct qedi_conn *qedi_conn)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+	struct qedi_cmd *cmd = task->dd_data;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
+		  "itid=0x%x, cmd task id=0x%x\n",
+		  cqe->itid, cmd->task_id);
+
+	cmd->state = RESPONSE_RECEIVED;
+	qedi_clear_task_idx(qedi, cmd->task_id);
+
+	spin_lock_bh(&session->back_lock);
+	__iscsi_put_task(task);
+	spin_unlock_bh(&session->back_lock);
+}
+
+static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
+					  struct iscsi_cqe_solicited *cqe,
+					  struct iscsi_task *task,
+					  struct iscsi_conn *conn)
+{
+	struct qedi_work_map *work, *work_tmp;
+	u32 proto_itt = cqe->itid;
+	u32 ptmp_itt = 0;
+	itt_t protoitt = 0;
+	int found = 0;
+	struct qedi_cmd *qedi_cmd = NULL;
+	u32 rtid = 0;
+	u32 iscsi_cid;
+	struct qedi_conn *qedi_conn;
+	struct qedi_cmd *cmd_new, *dbg_cmd;
+	struct iscsi_task *mtask;
+	struct iscsi_tm *tmf_hdr = NULL;
+
+	iscsi_cid = cqe->conn_id;
+	qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
+
+	/* Based on this itt get the corresponding qedi_cmd */
+	spin_lock_bh(&qedi_conn->tmf_work_lock);
+	list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
+				 list) {
+		if (work->rtid == proto_itt) {
+			/* We found the command */
+			qedi_cmd = work->qedi_cmd;
+			if (!qedi_cmd->list_tmf_work) {
+				QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+					  "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
+					  proto_itt, qedi_conn->iscsi_conn_id);
+				WARN_ON(1);
+			}
+			found = 1;
+			mtask = qedi_cmd->task;
+			tmf_hdr = (struct iscsi_tm *)mtask->hdr;
+			rtid = work->rtid;
+
+			list_del_init(&work->list);
+			kfree(work);
+			qedi_cmd->list_tmf_work = NULL;
+		}
+	}
+	spin_unlock_bh(&qedi_conn->tmf_work_lock);
+
+	if (found) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+			  "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
+			  proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
+
+		if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+		    ISCSI_TM_FUNC_ABORT_TASK) {
+			spin_lock_bh(&conn->session->back_lock);
+
+			protoitt = build_itt(get_itt(tmf_hdr->rtt),
+					     conn->session->age);
+			task = iscsi_itt_to_task(conn, protoitt);
+
+			spin_unlock_bh(&conn->session->back_lock);
+
+			if (!task) {
+				QEDI_NOTICE(&qedi->dbg_ctx,
+					    "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
+					    get_itt(tmf_hdr->rtt),
+					    qedi_conn->iscsi_conn_id);
+				return;
+			}
+
+			dbg_cmd = task->dd_data;
+
+			QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+				  "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
+				  get_itt(tmf_hdr->rtt), get_itt(task->itt),
+				  dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
+
+			if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
+				qedi_cmd->state = CLEANUP_RECV;
+
+			qedi_clear_task_idx(qedi_conn->qedi, rtid);
+
+			spin_lock(&qedi_conn->list_lock);
+			list_del_init(&dbg_cmd->io_cmd);
+			qedi_conn->active_cmd_count--;
+			spin_unlock(&qedi_conn->list_lock);
+			qedi_cmd->state = CLEANUP_RECV;
+			wake_up_interruptible(&qedi_conn->wait_queue);
+		}
+	} else if (qedi_conn->cmd_cleanup_req > 0) {
+		spin_lock_bh(&conn->session->back_lock);
+		qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
+		protoitt = build_itt(ptmp_itt, conn->session->age);
+		task = iscsi_itt_to_task(conn, protoitt);
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+			  "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
+			  cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
+			  qedi_conn->iscsi_conn_id);
+
+		spin_unlock_bh(&conn->session->back_lock);
+		if (!task) {
+			QEDI_NOTICE(&qedi->dbg_ctx,
+				    "task is null, itid=0x%x, cid=0x%x\n",
+				    cqe->itid, qedi_conn->iscsi_conn_id);
+			return;
+		}
+		qedi_conn->cmd_cleanup_cmpl++;
+		wake_up(&qedi_conn->wait_queue);
+		cmd_new = task->dd_data;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
+			  "Freeing tid=0x%x for cid=0x%x\n",
+			  cqe->itid, qedi_conn->iscsi_conn_id);
+		qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
+
+	} else {
+		qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
+		protoitt = build_itt(ptmp_itt, conn->session->age);
+		task = iscsi_itt_to_task(conn, protoitt);
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
+			 protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
+		WARN_ON(1);
+	}
+}
+
+void qedi_fp_process_cqes(struct qedi_work *work)
+{
+	struct qedi_ctx *qedi = work->qedi;
+	union iscsi_cqe *cqe = &work->cqe;
+	struct iscsi_task *task = NULL;
+	struct iscsi_nopout *nopout_hdr;
+	struct qedi_conn *q_conn;
+	struct iscsi_conn *conn;
+	struct qedi_cmd *qedi_cmd;
+	u32 comp_type;
+	u32 iscsi_cid;
+	u32 hdr_opcode;
+	u16 que_idx = work->que_idx;
+	u8 cqe_err_bits = 0;
+
+	comp_type = cqe->cqe_common.cqe_type;
+	hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
+	cqe_err_bits =
+		cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
+		  cqe->cqe_common.conn_id, comp_type, hdr_opcode);
+
+	if (comp_type >= MAX_ISCSI_CQES_TYPE) {
+		QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
+		return;
+	}
+
+	iscsi_cid  = cqe->cqe_common.conn_id;
+	q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
+	if (!q_conn) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Session no longer exists for cid=0x%x!!\n",
+			  iscsi_cid);
+		return;
+	}
+
+	conn = q_conn->cls_conn->dd_data;
+
+	if (unlikely(cqe_err_bits &&
+		     GET_FIELD(cqe_err_bits,
+			       CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
+		iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
+		return;
+	}
+
+	switch (comp_type) {
+	case ISCSI_CQE_TYPE_SOLICITED:
+	case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
+		qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
+		task = qedi_cmd->task;
+		if (!task) {
+			QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
+			return;
+		}
+
+		/* Process NOPIN local completion */
+		nopout_hdr = (struct iscsi_nopout *)task->hdr;
+		if ((nopout_hdr->itt == RESERVED_ITT) &&
+		    (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
+			qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
+						      task, q_conn);
+		} else {
+			cqe->cqe_solicited.itid =
+					       qedi_get_itt(cqe->cqe_solicited);
+			/* Process other solicited responses */
+			qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
+		}
+		break;
+	case ISCSI_CQE_TYPE_UNSOLICITED:
+		switch (hdr_opcode) {
+		case ISCSI_OPCODE_NOP_IN:
+			qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
+						que_idx);
+			break;
+		case ISCSI_OPCODE_ASYNC_MSG:
+			qedi_process_async_mesg(qedi, cqe, task, q_conn,
+						que_idx);
+			break;
+		case ISCSI_OPCODE_REJECT:
+			qedi_process_reject_mesg(qedi, cqe, task, q_conn,
+						 que_idx);
+			break;
+		}
+		goto exit_fp_process;
+	case ISCSI_CQE_TYPE_DUMMY:
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
+		goto exit_fp_process;
+	case ISCSI_CQE_TYPE_TASK_CLEANUP:
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
+		qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
+					      conn);
+		goto exit_fp_process;
+	default:
+		QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
+		break;
+	}
+
+exit_fp_process:
+	return;
+}
+
+static void qedi_add_to_sq(struct qedi_conn *qedi_conn, struct iscsi_task *task,
+			   u16 tid, uint16_t ptu_invalidate, int is_cleanup)
+{
+	struct iscsi_wqe *wqe;
+	struct iscsi_wqe_field *cont_field;
+	struct qedi_endpoint *ep;
+	struct scsi_cmnd *sc = task->sc;
+	struct iscsi_login_req *login_hdr;
+	struct qedi_cmd *cmd = task->dd_data;
+
+	login_hdr = (struct iscsi_login_req *)task->hdr;
+	ep = qedi_conn->ep;
+	wqe = &ep->sq[ep->sq_prod_idx];
+
+	memset(wqe, 0, sizeof(*wqe));
+
+	ep->sq_prod_idx++;
+	ep->fw_sq_prod_idx++;
+	if (ep->sq_prod_idx == QEDI_SQ_SIZE)
+		ep->sq_prod_idx = 0;
+
+	if (is_cleanup) {
+		SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
+			  ISCSI_WQE_TYPE_TASK_CLEANUP);
+		wqe->task_id = tid;
+		return;
+	}
+
+	if (ptu_invalidate) {
+		SET_FIELD(wqe->flags, ISCSI_WQE_PTU_INVALIDATE,
+			  ISCSI_WQE_SET_PTU_INVALIDATE);
+	}
+
+	cont_field = &wqe->cont_prevtid_union.cont_field;
+
+	switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
+	case ISCSI_OP_LOGIN:
+	case ISCSI_OP_TEXT:
+		SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
+			  ISCSI_WQE_TYPE_MIDDLE_PATH);
+		SET_FIELD(wqe->flags, ISCSI_WQE_NUM_FAST_SGES,
+			  1);
+		cont_field->contlen_cdbsize_field = ntoh24(login_hdr->dlength);
+		break;
+	case ISCSI_OP_LOGOUT:
+	case ISCSI_OP_NOOP_OUT:
+	case ISCSI_OP_SCSI_TMFUNC:
+		 SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
+			   ISCSI_WQE_TYPE_NORMAL);
+		break;
+	default:
+		if (!sc)
+			break;
+
+		SET_FIELD(wqe->flags, ISCSI_WQE_WQE_TYPE,
+			  ISCSI_WQE_TYPE_NORMAL);
+		cont_field->contlen_cdbsize_field =
+				(sc->sc_data_direction == DMA_TO_DEVICE) ?
+				scsi_bufflen(sc) : 0;
+		if (cmd->use_slowpath)
+			SET_FIELD(wqe->flags, ISCSI_WQE_NUM_FAST_SGES, 0);
+		else
+			SET_FIELD(wqe->flags, ISCSI_WQE_NUM_FAST_SGES,
+				  (sc->sc_data_direction ==
+				   DMA_TO_DEVICE) ?
+				  min((u16)QEDI_FAST_SGE_COUNT,
+				      (u16)cmd->io_tbl.sge_valid) : 0);
+		break;
+	}
+
+	wqe->task_id = tid;
+	/* Make sure SQ data is coherent */
+	wmb();
+}
+
+static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
+{
+	struct iscsi_db_data dbell = { 0 };
+
+	dbell.agg_flags = 0;
+
+	dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
+	dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
+	dbell.params |=
+		   DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
+
+	dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
+	writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
+
+	/* Make sure fw write idx is coherent, and include both memory barriers
+	 * as a failsafe as for some architectures the call is the same but on
+	 * others they are two different assembly operations.
+	 */
+	wmb();
+	mmiowb();
+	QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
+		  "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
+		  qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
+		  qedi_conn->iscsi_conn_id);
+}
+
+int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *task)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_login_req *login_hdr;
+	struct iscsi_login_req_hdr *fw_login_req = NULL;
+	struct iscsi_cached_sge_ctx *cached_sge = NULL;
+	struct iscsi_sge *single_sge = NULL;
+	struct iscsi_sge *req_sge = NULL;
+	struct iscsi_sge *resp_sge = NULL;
+	struct qedi_cmd *qedi_cmd;
+	s16 ptu_invalidate = 0;
+	s16 tid = 0;
+
+	req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+	resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
+	qedi_cmd = (struct qedi_cmd *)task->dd_data;
+	login_hdr = (struct iscsi_login_req *)task->hdr;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1)
+		return -ENOMEM;
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+
+	qedi_cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_login_req = &fw_task_ctx->ystorm_st_context.pdu_hdr.login_req;
+	fw_login_req->opcode = login_hdr->opcode;
+	fw_login_req->version_min = login_hdr->min_version;
+	fw_login_req->version_max = login_hdr->max_version;
+	fw_login_req->flags_attr = login_hdr->flags;
+	fw_login_req->isid_tabc = *((u16 *)login_hdr->isid + 2);
+	fw_login_req->isid_d = *((u32 *)login_hdr->isid);
+	fw_login_req->tsih = login_hdr->tsih;
+	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
+	fw_login_req->itt = qedi_set_itt(tid, get_itt(task->itt));
+	fw_login_req->cid = qedi_conn->iscsi_conn_id;
+	fw_login_req->cmd_sn = be32_to_cpu(login_hdr->cmdsn);
+	fw_login_req->exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
+	fw_login_req->exp_stat_sn = 0;
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						qedi->tid_reuse_count[tid]++;
+	cached_sge =
+	       &fw_task_ctx->ystorm_st_context.state.sgl_ctx_union.cached_sge;
+	cached_sge->sge.sge_len = req_sge->sge_len;
+	cached_sge->sge.sge_addr.lo = (u32)(qedi_conn->gen_pdu.req_dma_addr);
+	cached_sge->sge.sge_addr.hi =
+			     (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
+
+	/* Mstorm context */
+	single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
+	fw_task_ctx->mstorm_st_context.task_type = 0x2;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+	single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
+	single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
+	single_sge->sge_len = resp_sge->sge_len;
+
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SINGLE_SGE, 1);
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SLOW_IO, 0);
+	fw_task_ctx->mstorm_st_context.sgl_size = 1;
+	fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = resp_sge->sge_len;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len =
+						ntoh24(login_hdr->dlength);
+	fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+	fw_task_ctx->ustorm_st_context.task_type = 0x2;
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	fw_task_ctx->ustorm_ag_context.exp_data_acked =
+						 ntoh24(login_hdr->dlength);
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+		  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
+
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+	qedi_cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+	return 0;
+}
+
+int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_logout_req_hdr *fw_logout_req = NULL;
+	struct iscsi_task_context *fw_task_ctx = NULL;
+	struct iscsi_logout *logout_hdr = NULL;
+	struct qedi_cmd *qedi_cmd = NULL;
+	s16  tid = 0;
+	s16 ptu_invalidate = 0;
+
+	qedi_cmd = (struct qedi_cmd *)task->dd_data;
+	logout_hdr = (struct iscsi_logout *)task->hdr;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1)
+		return -ENOMEM;
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+	qedi_cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_logout_req = &fw_task_ctx->ystorm_st_context.pdu_hdr.logout_req;
+	fw_logout_req->opcode = ISCSI_OPCODE_LOGOUT_REQUEST;
+	fw_logout_req->reason_code = 0x80 | logout_hdr->flags;
+	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
+	fw_logout_req->itt = qedi_set_itt(tid, get_itt(task->itt));
+	fw_logout_req->exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
+	fw_logout_req->cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						  qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						qedi->tid_reuse_count[tid]++;
+	fw_logout_req->cid = qedi_conn->iscsi_conn_id;
+	fw_task_ctx->ystorm_st_context.state.buffer_offset[0] = 0;
+
+	/* Mstorm context */
+	fw_task_ctx->mstorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = 0;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len = 0;
+	fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
+	fw_task_ctx->ustorm_st_context.task_type =  ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+
+	SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+		  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+		  ISCSI_REG1_NUM_FAST_SGES, 0);
+
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+	qedi_cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+
+	return 0;
+}
+
+int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
+			struct iscsi_task *task, bool in_recovery)
+{
+	int rval;
+	struct iscsi_task *ctask;
+	struct qedi_cmd *cmd, *cmd_tmp;
+	struct iscsi_tm *tmf_hdr;
+	unsigned int lun = 0;
+	bool lun_reset = false;
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_session *session = conn->session;
+
+	/* From recovery, task is NULL or from tmf resp valid task */
+	if (task) {
+		tmf_hdr = (struct iscsi_tm *)task->hdr;
+
+		if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+			ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
+			lun_reset = true;
+			lun = scsilun_to_int(&tmf_hdr->lun);
+		}
+	}
+
+	qedi_conn->cmd_cleanup_req = 0;
+	qedi_conn->cmd_cleanup_cmpl = 0;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
+		  qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
+		  in_recovery, lun_reset);
+
+	if (lun_reset)
+		spin_lock_bh(&session->back_lock);
+
+	spin_lock(&qedi_conn->list_lock);
+
+	list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
+				 io_cmd) {
+		ctask = cmd->task;
+		if (ctask == task)
+			continue;
+
+		if (lun_reset) {
+			if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
+				QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+					  "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
+					  cmd->task_id, get_itt(ctask->itt),
+					  cmd->scsi_cmd, cmd->scsi_cmd->device,
+					  ctask->state, cmd->state,
+					  qedi_conn->iscsi_conn_id);
+				if (cmd->scsi_cmd->device->lun != lun)
+					continue;
+			}
+		}
+		qedi_conn->cmd_cleanup_req++;
+		qedi_iscsi_cleanup_task(ctask, true);
+
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
+			  &cmd->io_cmd, qedi_conn->iscsi_conn_id);
+	}
+
+	spin_unlock(&qedi_conn->list_lock);
+
+	if (lun_reset)
+		spin_unlock_bh(&session->back_lock);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "cmd_cleanup_req=%d, cid=0x%x\n",
+		  qedi_conn->cmd_cleanup_req,
+		  qedi_conn->iscsi_conn_id);
+
+	rval  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
+						 ((qedi_conn->cmd_cleanup_req ==
+						 qedi_conn->cmd_cleanup_cmpl) ||
+						 qedi_conn->ep),
+						 5 * HZ);
+	if (rval) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+			  "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
+			  qedi_conn->cmd_cleanup_req,
+			  qedi_conn->cmd_cleanup_cmpl,
+			  qedi_conn->iscsi_conn_id);
+
+		return 0;
+	}
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
+		  qedi_conn->cmd_cleanup_req,
+		  qedi_conn->cmd_cleanup_cmpl,
+		  qedi_conn->iscsi_conn_id);
+
+	iscsi_host_for_each_session(qedi->shost,
+				    qedi_mark_device_missing);
+	qedi_ops->common->drain(qedi->cdev);
+
+	/* Enable IOs for all other sessions except current.*/
+	if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
+					      (qedi_conn->cmd_cleanup_req ==
+					       qedi_conn->cmd_cleanup_cmpl),
+					      5 * HZ)) {
+		iscsi_host_for_each_session(qedi->shost,
+					    qedi_mark_device_available);
+		return -1;
+	}
+
+	iscsi_host_for_each_session(qedi->shost,
+				    qedi_mark_device_available);
+
+	return 0;
+}
+
+void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
+		  struct iscsi_task *task)
+{
+	struct qedi_endpoint *qedi_ep;
+	int rval;
+
+	qedi_ep = qedi_conn->ep;
+	qedi_conn->cmd_cleanup_req = 0;
+	qedi_conn->cmd_cleanup_cmpl = 0;
+
+	if (!qedi_ep) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Cannot proceed, ep already disconnected, cid=0x%x\n",
+			  qedi_conn->iscsi_conn_id);
+		return;
+	}
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
+		  qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
+
+	qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
+
+	rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
+	if (rval) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "fatal error, need hard reset, cid=0x%x\n",
+			 qedi_conn->iscsi_conn_id);
+		WARN_ON(1);
+	}
+}
+
+static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
+					 struct qedi_conn *qedi_conn,
+					 struct iscsi_task *task,
+					 struct qedi_cmd *qedi_cmd,
+					 struct qedi_work_map *list_work)
+{
+	struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
+	int wait;
+
+	wait  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
+						 ((qedi_cmd->state ==
+						   CLEANUP_RECV) ||
+						 ((qedi_cmd->type == TYPEIO) &&
+						  (cmd->state ==
+						   RESPONSE_RECEIVED))),
+						 5 * HZ);
+	if (!wait) {
+		qedi_cmd->state = CLEANUP_WAIT_FAILED;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+			  "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
+			  cmd->task_id, qedi_conn->iscsi_conn_id);
+
+		return -1;
+	}
+	return 0;
+}
+
+static void qedi_tmf_work(struct work_struct *work)
+{
+	struct qedi_cmd *qedi_cmd =
+		container_of(work, struct qedi_cmd, tmf_work);
+	struct qedi_conn *qedi_conn = qedi_cmd->conn;
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct iscsi_cls_session *cls_sess;
+	struct qedi_work_map *list_work = NULL;
+	struct iscsi_task *mtask;
+	struct qedi_cmd *cmd;
+	struct iscsi_task *ctask;
+	struct iscsi_tm *tmf_hdr;
+	s16 rval = 0;
+	s16 tid = 0;
+
+	mtask = qedi_cmd->task;
+	tmf_hdr = (struct iscsi_tm *)mtask->hdr;
+	cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
+	set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+
+	ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
+	if (!ctask || !ctask->sc) {
+		QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
+		goto abort_ret;
+	}
+
+	cmd = (struct qedi_cmd *)ctask->dd_data;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
+		  get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
+		  qedi_conn->iscsi_conn_id);
+
+	if (do_not_recover) {
+		QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
+			 do_not_recover);
+		goto abort_ret;
+	}
+
+	list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
+	if (!list_work) {
+		QEDI_ERR(&qedi->dbg_ctx, "Memory alloction failed\n");
+		goto abort_ret;
+	}
+
+	qedi_cmd->type = TYPEIO;
+	list_work->qedi_cmd = qedi_cmd;
+	list_work->rtid = cmd->task_id;
+	list_work->state = QEDI_WORK_SCHEDULED;
+	qedi_cmd->list_tmf_work = list_work;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
+		  list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
+		  tmf_hdr->flags);
+
+	spin_lock_bh(&qedi_conn->tmf_work_lock);
+	list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
+	spin_unlock_bh(&qedi_conn->tmf_work_lock);
+
+	qedi_iscsi_cleanup_task(ctask, false);
+
+	rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
+					     list_work);
+	if (rval == -1) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "FW cleanup got escalated, cid=0x%x\n",
+			  qedi_conn->iscsi_conn_id);
+		goto ldel_exit;
+	}
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1) {
+		QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
+			 qedi_conn->iscsi_conn_id);
+		goto ldel_exit;
+	}
+
+	qedi_cmd->task_id = tid;
+	qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
+
+abort_ret:
+	clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+	return;
+
+ldel_exit:
+	spin_lock_bh(&qedi_conn->tmf_work_lock);
+	if (!qedi_cmd->list_tmf_work) {
+		list_del_init(&list_work->list);
+		qedi_cmd->list_tmf_work = NULL;
+		kfree(list_work);
+	}
+	spin_unlock_bh(&qedi_conn->tmf_work_lock);
+
+	spin_lock(&qedi_conn->list_lock);
+	list_del_init(&cmd->io_cmd);
+	qedi_conn->active_cmd_count--;
+	spin_unlock(&qedi_conn->list_lock);
+
+	clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+}
+
+static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
+			       struct iscsi_task *mtask)
+{
+	struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_tmf_request_hdr *fw_tmf_request;
+	struct iscsi_sge *single_sge;
+	struct qedi_cmd *qedi_cmd;
+	struct qedi_cmd *cmd;
+	struct iscsi_task *ctask;
+	struct iscsi_tm *tmf_hdr;
+	struct iscsi_sge *req_sge;
+	struct iscsi_sge *resp_sge;
+	u32 lun[2];
+	s16 tid = 0, ptu_invalidate = 0;
+
+	req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+	resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
+	qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
+	tmf_hdr = (struct iscsi_tm *)mtask->hdr;
+
+	tid = qedi_cmd->task_id;
+	qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+
+	fw_tmf_request = &fw_task_ctx->ystorm_st_context.pdu_hdr.tmf_request;
+	fw_tmf_request->itt = qedi_set_itt(tid, get_itt(mtask->itt));
+	fw_tmf_request->cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
+
+	memcpy(lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
+	fw_tmf_request->lun.lo = be32_to_cpu(lun[0]);
+	fw_tmf_request->lun.hi = be32_to_cpu(lun[1]);
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						qedi->tid_reuse_count[tid]++;
+
+	if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	     ISCSI_TM_FUNC_ABORT_TASK) {
+		ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
+		if (!ctask || !ctask->sc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not get reference task\n");
+			return 0;
+		}
+		cmd = (struct qedi_cmd *)ctask->dd_data;
+		fw_tmf_request->rtt =
+				qedi_set_itt(cmd->task_id,
+					     get_itt(tmf_hdr->rtt));
+	} else {
+		fw_tmf_request->rtt = ISCSI_RESERVED_TAG;
+	}
+
+	fw_tmf_request->opcode = tmf_hdr->opcode;
+	fw_tmf_request->function = tmf_hdr->flags;
+	fw_tmf_request->hdr_second_dword = ntoh24(tmf_hdr->dlength);
+	fw_tmf_request->ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
+
+	single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
+	fw_task_ctx->mstorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+	single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
+	single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
+	single_sge->sge_len = resp_sge->sge_len;
+
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SINGLE_SGE, 1);
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SLOW_IO, 0);
+	fw_task_ctx->mstorm_st_context.sgl_size = 1;
+	fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = 0;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len = 0;
+	fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
+	fw_task_ctx->ustorm_st_context.task_type =  ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+
+	SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+		  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+		  ISCSI_REG1_NUM_FAST_SGES, 0);
+
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+	fw_task_ctx->ustorm_st_context.lun.lo = be32_to_cpu(lun[0]);
+	fw_task_ctx->ustorm_st_context.lun.hi = be32_to_cpu(lun[1]);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "Add TMF to SQ, tmf tid=0x%x, itt=0x%x, cid=0x%x\n",
+		  tid,  mtask->itt, qedi_conn->iscsi_conn_id);
+
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+	qedi_cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, mtask, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+	return 0;
+}
+
+int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *mtask)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_tm *tmf_hdr;
+	struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
+	s16 tid = 0;
+
+	tmf_hdr = (struct iscsi_tm *)mtask->hdr;
+	qedi_cmd->task = mtask;
+
+	/* If abort task then schedule the work and return */
+	if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+	    ISCSI_TM_FUNC_ABORT_TASK) {
+		qedi_cmd->state = CLEANUP_WAIT;
+		INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
+		queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
+
+	} else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+		    ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
+		   ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+		    ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
+		   ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
+		    ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
+		tid = qedi_get_task_idx(qedi);
+		if (tid == -1) {
+			QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
+				 qedi_conn->iscsi_conn_id);
+			return -1;
+		}
+		qedi_cmd->task_id = tid;
+
+		qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
+
+	} else {
+		QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
+			 qedi_conn->iscsi_conn_id);
+		return -1;
+	}
+
+	return 0;
+}
+
+int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
+			 struct iscsi_task *task)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_text_request_hdr *fw_text_request;
+	struct iscsi_cached_sge_ctx *cached_sge;
+	struct iscsi_sge *single_sge;
+	struct qedi_cmd *qedi_cmd;
+	/* For 6.5 hdr iscsi_hdr */
+	struct iscsi_text *text_hdr;
+	struct iscsi_sge *req_sge;
+	struct iscsi_sge *resp_sge;
+	s16 ptu_invalidate = 0;
+	s16 tid = 0;
+
+	req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+	resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
+	qedi_cmd = (struct qedi_cmd *)task->dd_data;
+	text_hdr = (struct iscsi_text *)task->hdr;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1)
+		return -ENOMEM;
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+
+	qedi_cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_text_request =
+			&fw_task_ctx->ystorm_st_context.pdu_hdr.text_request;
+	fw_text_request->opcode = text_hdr->opcode;
+	fw_text_request->flags_attr = text_hdr->flags;
+
+	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
+	fw_text_request->itt = qedi_set_itt(tid, get_itt(task->itt));
+	fw_text_request->ttt = text_hdr->ttt;
+	fw_text_request->cmd_sn = be32_to_cpu(text_hdr->cmdsn);
+	fw_text_request->exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
+	fw_text_request->hdr_second_dword = ntoh24(text_hdr->dlength);
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						     qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						   qedi->tid_reuse_count[tid]++;
+
+	cached_sge =
+	       &fw_task_ctx->ystorm_st_context.state.sgl_ctx_union.cached_sge;
+	cached_sge->sge.sge_len = req_sge->sge_len;
+	cached_sge->sge.sge_addr.lo = (u32)(qedi_conn->gen_pdu.req_dma_addr);
+	cached_sge->sge.sge_addr.hi =
+			      (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
+
+	/* Mstorm context */
+	single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
+	fw_task_ctx->mstorm_st_context.task_type = 0x2;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+	single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
+	single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
+	single_sge->sge_len = resp_sge->sge_len;
+
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SINGLE_SGE, 1);
+	SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+		  ISCSI_MFLAGS_SLOW_IO, 0);
+	fw_task_ctx->mstorm_st_context.sgl_size = 1;
+	fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_ag_context.exp_data_acked =
+						      ntoh24(text_hdr->dlength);
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = resp_sge->sge_len;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len =
+						      ntoh24(text_hdr->dlength);
+	fw_task_ctx->ustorm_st_context.exp_data_sn =
+					      be32_to_cpu(text_hdr->exp_statsn);
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+	fw_task_ctx->ustorm_st_context.task_type = 0x2;
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+
+	/*  Add command in active command list */
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+	qedi_cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+
+	return 0;
+}
+
+int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task,
+			   char *datap, int data_len, int unsol)
+{
+	struct qedi_ctx *qedi = qedi_conn->qedi;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_nop_out_hdr *fw_nop_out;
+	struct qedi_cmd *qedi_cmd;
+	/* For 6.5 hdr iscsi_hdr */
+	struct iscsi_nopout *nopout_hdr;
+	struct iscsi_cached_sge_ctx *cached_sge;
+	struct iscsi_sge *single_sge;
+	struct iscsi_sge *req_sge;
+	struct iscsi_sge *resp_sge;
+	u32 lun[2];
+	s16 ptu_invalidate = 0;
+	s16 tid = 0;
+
+	req_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+	resp_sge = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
+	qedi_cmd = (struct qedi_cmd *)task->dd_data;
+	nopout_hdr = (struct iscsi_nopout *)task->hdr;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1) {
+		QEDI_WARN(&qedi->dbg_ctx, "Invalid tid\n");
+		return -ENOMEM;
+	}
+
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+	qedi_cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_nop_out = &fw_task_ctx->ystorm_st_context.pdu_hdr.nop_out;
+	SET_FIELD(fw_nop_out->flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
+	SET_FIELD(fw_nop_out->flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
+
+	memcpy(lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
+	fw_nop_out->lun.lo = be32_to_cpu(lun[0]);
+	fw_nop_out->lun.hi = be32_to_cpu(lun[1]);
+
+	qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
+
+	if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
+		fw_nop_out->itt = be32_to_cpu(nopout_hdr->itt);
+		fw_nop_out->ttt = be32_to_cpu(nopout_hdr->ttt);
+		fw_task_ctx->ystorm_st_context.state.buffer_offset[0] = 0;
+		fw_task_ctx->ystorm_st_context.state.local_comp = 1;
+		SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+			  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 1);
+	} else {
+		fw_nop_out->itt = qedi_set_itt(tid, get_itt(task->itt));
+		fw_nop_out->ttt = ISCSI_TTT_ALL_ONES;
+		fw_task_ctx->ystorm_st_context.state.buffer_offset[0] = 0;
+
+		spin_lock(&qedi_conn->list_lock);
+		list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
+		qedi_cmd->io_cmd_in_list = true;
+		qedi_conn->active_cmd_count++;
+		spin_unlock(&qedi_conn->list_lock);
+	}
+
+	fw_nop_out->opcode = ISCSI_OPCODE_NOP_OUT;
+	fw_nop_out->cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
+	fw_nop_out->exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
+
+	cached_sge =
+	       &fw_task_ctx->ystorm_st_context.state.sgl_ctx_union.cached_sge;
+	cached_sge->sge.sge_len = req_sge->sge_len;
+	cached_sge->sge.sge_addr.lo = (u32)(qedi_conn->gen_pdu.req_dma_addr);
+	cached_sge->sge.sge_addr.hi =
+			(u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
+
+	/* Mstorm context */
+	fw_task_ctx->mstorm_st_context.task_type = ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->mstorm_ag_context.task_cid = (u16)qedi_conn->iscsi_conn_id;
+
+	single_sge = &fw_task_ctx->mstorm_st_context.sgl_union.single_sge;
+	single_sge->sge_addr.lo = resp_sge->sge_addr.lo;
+	single_sge->sge_addr.hi = resp_sge->sge_addr.hi;
+	single_sge->sge_len = resp_sge->sge_len;
+	fw_task_ctx->mstorm_st_context.rem_task_size = resp_sge->sge_len;
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						qedi->tid_reuse_count[tid]++;
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = resp_sge->sge_len;
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len = data_len;
+	fw_task_ctx->ustorm_st_context.exp_data_sn = 0;
+	fw_task_ctx->ustorm_st_context.task_type =  ISCSI_TASK_TYPE_MIDPATH;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = 0;
+
+	SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+		  ISCSI_REG1_NUM_FAST_SGES, 0);
+
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+
+	fw_task_ctx->ustorm_st_context.lun.lo = be32_to_cpu(lun[0]);
+	fw_task_ctx->ustorm_st_context.lun.hi = be32_to_cpu(lun[1]);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+	return 0;
+}
+
+static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
+			 int bd_index)
+{
+	struct iscsi_sge *bd = cmd->io_tbl.sge_tbl;
+	int frag_size, sg_frags;
+
+	sg_frags = 0;
+
+	while (sg_len) {
+		if (addr % QEDI_PAGE_SIZE)
+			frag_size =
+				   (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
+		else
+			frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
+				    (sg_len % QEDI_BD_SPLIT_SZ);
+
+		if (frag_size == 0)
+			frag_size = QEDI_BD_SPLIT_SZ;
+
+		bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
+		bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
+		bd[bd_index + sg_frags].sge_len = (u16)frag_size;
+		QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
+			  "split sge %d: addr=%llx, len=%x",
+			  (bd_index + sg_frags), addr, frag_size);
+
+		addr += (u64)frag_size;
+		sg_frags++;
+		sg_len -= frag_size;
+	}
+	return sg_frags;
+}
+
+static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
+{
+	struct scsi_cmnd *sc = cmd->scsi_cmd;
+	struct iscsi_sge *bd = cmd->io_tbl.sge_tbl;
+	struct scatterlist *sg;
+	int byte_count = 0;
+	int bd_count = 0;
+	int sg_count;
+	int sg_len;
+	int sg_frags;
+	u64 addr, end_addr;
+	int i;
+
+	WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
+
+	sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
+			      scsi_sg_count(sc), sc->sc_data_direction);
+
+	/*
+	 * New condition to send single SGE as cached-SGL.
+	 * Single SGE with length less than 64K.
+	 */
+	sg = scsi_sglist(sc);
+	if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
+		sg_len = sg_dma_len(sg);
+		addr = (u64)sg_dma_address(sg);
+
+		bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
+		bd[bd_count].sge_addr.hi = (addr >> 32);
+		bd[bd_count].sge_len = (u16)sg_len;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
+			  "single-cashed-sgl: bd_count:%d addr=%llx, len=%x",
+			  sg_count, addr, sg_len);
+
+		return ++bd_count;
+	}
+
+	scsi_for_each_sg(sc, sg, sg_count, i) {
+		sg_len = sg_dma_len(sg);
+		addr = (u64)sg_dma_address(sg);
+		end_addr = (addr + sg_len);
+
+		/*
+		 * first sg elem in the 'list',
+		 * check if end addr is page-aligned.
+		 */
+		if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
+			cmd->use_slowpath = true;
+
+		/*
+		 * last sg elem in the 'list',
+		 * check if start addr is page-aligned.
+		 */
+		else if ((i == (sg_count - 1)) &&
+			 (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
+			cmd->use_slowpath = true;
+
+		/*
+		 * middle sg elements in list,
+		 * check if start and end addr is page-aligned
+		 */
+		else if ((i != 0) && (i != (sg_count - 1)) &&
+			 ((addr % QEDI_PAGE_SIZE) ||
+			 (end_addr % QEDI_PAGE_SIZE)))
+			cmd->use_slowpath = true;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
+			  i, sg_len);
+
+		if (sg_len > QEDI_BD_SPLIT_SZ) {
+			sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
+		} else {
+			sg_frags = 1;
+			bd[bd_count].sge_addr.lo = addr & 0xffffffff;
+			bd[bd_count].sge_addr.hi = addr >> 32;
+			bd[bd_count].sge_len = sg_len;
+		}
+		byte_count += sg_len;
+		bd_count += sg_frags;
+	}
+
+	if (byte_count != scsi_bufflen(sc))
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "byte_count = %d != scsi_bufflen = %d\n", byte_count,
+			 scsi_bufflen(sc));
+	else
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
+			  byte_count);
+
+	WARN_ON(byte_count != scsi_bufflen(sc));
+
+	return bd_count;
+}
+
+static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
+{
+	int bd_count;
+	struct scsi_cmnd *sc = cmd->scsi_cmd;
+
+	if (scsi_sg_count(sc)) {
+		bd_count  = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
+		if (bd_count == 0)
+			return;
+	} else {
+		struct iscsi_sge *bd = cmd->io_tbl.sge_tbl;
+
+		bd[0].sge_addr.lo = 0;
+		bd[0].sge_addr.hi = 0;
+		bd[0].sge_len = 0;
+		bd_count = 0;
+	}
+	cmd->io_tbl.sge_valid = bd_count;
+}
+
+static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
+{
+	u32 dword;
+	int lpcnt;
+	u8 *srcp;
+
+	lpcnt = sc->cmd_len / sizeof(dword);
+	srcp = (u8 *)sc->cmnd;
+	while (lpcnt--) {
+		memcpy(&dword, (const void *)srcp, 4);
+		*dstp = cpu_to_be32(dword);
+		srcp += 4;
+		dstp++;
+	}
+	if (sc->cmd_len & 0x3) {
+		dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
+		*dstp = cpu_to_be32(dword);
+	}
+}
+
+void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
+		   u16 tid, int8_t direction)
+{
+	struct qedi_io_log *io_log;
+	struct iscsi_conn *conn = task->conn;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct scsi_cmnd *sc_cmd = task->sc;
+	unsigned long flags;
+	u8 op;
+
+	spin_lock_irqsave(&qedi->io_trace_lock, flags);
+
+	io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
+	io_log->direction = direction;
+	io_log->task_id = tid;
+	io_log->cid = qedi_conn->iscsi_conn_id;
+	io_log->lun = sc_cmd->device->lun;
+	io_log->op = sc_cmd->cmnd[0];
+	op = sc_cmd->cmnd[0];
+	io_log->lba[0] = sc_cmd->cmnd[2];
+	io_log->lba[1] = sc_cmd->cmnd[3];
+	io_log->lba[2] = sc_cmd->cmnd[4];
+	io_log->lba[3] = sc_cmd->cmnd[5];
+	io_log->bufflen = scsi_bufflen(sc_cmd);
+	io_log->sg_count = scsi_sg_count(sc_cmd);
+	io_log->fast_sgs = qedi->fast_sgls;
+	io_log->cached_sgs = qedi->cached_sgls;
+	io_log->slow_sgs = qedi->slow_sgls;
+	io_log->cached_sge = qedi->use_cached_sge;
+	io_log->slow_sge = qedi->use_slow_sge;
+	io_log->fast_sge = qedi->use_fast_sge;
+	io_log->result = sc_cmd->result;
+	io_log->jiffies = jiffies;
+	io_log->blk_req_cpu = smp_processor_id();
+
+	if (direction == QEDI_IO_TRACE_REQ) {
+		/* For requests we only care about the submission CPU */
+		io_log->req_cpu = smp_processor_id() % qedi->num_queues;
+		io_log->intr_cpu = 0;
+		io_log->blk_rsp_cpu = 0;
+	} else if (direction == QEDI_IO_TRACE_RSP) {
+		io_log->req_cpu = smp_processor_id() % qedi->num_queues;
+		io_log->intr_cpu = qedi->intr_cpu;
+		io_log->blk_rsp_cpu = smp_processor_id();
+	}
+
+	qedi->io_trace_idx++;
+	if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
+		qedi->io_trace_idx = 0;
+
+	qedi->use_cached_sge = false;
+	qedi->use_slow_sge = false;
+	qedi->use_fast_sge = false;
+
+	spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
+}
+
+int qedi_iscsi_send_ioreq(struct iscsi_task *task)
+{
+	struct iscsi_conn *conn = task->conn;
+	struct iscsi_session *session = conn->session;
+	struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
+	struct qedi_ctx *qedi = iscsi_host_priv(shost);
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_cmd *cmd = task->dd_data;
+	struct scsi_cmnd *sc = task->sc;
+	struct iscsi_task_context *fw_task_ctx;
+	struct iscsi_cached_sge_ctx *cached_sge;
+	struct iscsi_phys_sgl_ctx *phys_sgl;
+	struct iscsi_virt_sgl_ctx *virt_sgl;
+	struct ystorm_iscsi_task_st_ctx *yst_cxt;
+	struct mstorm_iscsi_task_st_ctx *mst_cxt;
+	struct iscsi_sgl *sgl_struct;
+	struct iscsi_sge *single_sge;
+	struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
+	struct iscsi_sge *bd = cmd->io_tbl.sge_tbl;
+	enum iscsi_task_type task_type;
+	struct iscsi_cmd_hdr *fw_cmd;
+	u32 lun[2];
+	u32 exp_data;
+	u16 cq_idx = smp_processor_id() % qedi->num_queues;
+	s16 ptu_invalidate = 0;
+	s16 tid = 0;
+	u8 num_fast_sgs;
+
+	tid = qedi_get_task_idx(qedi);
+	if (tid == -1)
+		return -ENOMEM;
+
+	qedi_iscsi_map_sg_list(cmd);
+
+	int_to_scsilun(sc->device->lun, (struct scsi_lun *)lun);
+	fw_task_ctx = qedi_get_task_mem(&qedi->tasks, tid);
+
+	memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
+	cmd->task_id = tid;
+
+	/* Ystorm context */
+	fw_cmd = &fw_task_ctx->ystorm_st_context.pdu_hdr.cmd;
+	SET_FIELD(fw_cmd->flags_attr, ISCSI_CMD_HDR_ATTR, ISCSI_ATTR_SIMPLE);
+
+	if (sc->sc_data_direction == DMA_TO_DEVICE) {
+		if (conn->session->initial_r2t_en) {
+			exp_data = min((conn->session->imm_data_en *
+					conn->max_xmit_dlength),
+				       conn->session->first_burst);
+			exp_data = min(exp_data, scsi_bufflen(sc));
+			fw_task_ctx->ustorm_ag_context.exp_data_acked =
+							  cpu_to_le32(exp_data);
+		} else {
+			fw_task_ctx->ustorm_ag_context.exp_data_acked =
+			      min(conn->session->first_burst, scsi_bufflen(sc));
+		}
+
+		SET_FIELD(fw_cmd->flags_attr, ISCSI_CMD_HDR_WRITE, 1);
+		task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
+	} else {
+		if (scsi_bufflen(sc))
+			SET_FIELD(fw_cmd->flags_attr, ISCSI_CMD_HDR_READ, 1);
+		task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
+	}
+
+	fw_cmd->lun.lo = be32_to_cpu(lun[0]);
+	fw_cmd->lun.hi = be32_to_cpu(lun[1]);
+
+	qedi_update_itt_map(qedi, tid, task->itt, cmd);
+	fw_cmd->itt = qedi_set_itt(tid, get_itt(task->itt));
+	fw_cmd->expected_transfer_length = scsi_bufflen(sc);
+	fw_cmd->cmd_sn = be32_to_cpu(hdr->cmdsn);
+	fw_cmd->opcode = hdr->opcode;
+	qedi_cpy_scsi_cdb(sc, (u32 *)fw_cmd->cdb);
+
+	/* Mstorm context */
+	fw_task_ctx->mstorm_st_context.sense_db.lo = (u32)cmd->sense_buffer_dma;
+	fw_task_ctx->mstorm_st_context.sense_db.hi =
+					(u32)((u64)cmd->sense_buffer_dma >> 32);
+	fw_task_ctx->mstorm_ag_context.task_cid = qedi_conn->iscsi_conn_id;
+	fw_task_ctx->mstorm_st_context.task_type = task_type;
+
+	if (qedi->tid_reuse_count[tid] == QEDI_MAX_TASK_NUM) {
+		ptu_invalidate = 1;
+		qedi->tid_reuse_count[tid] = 0;
+	}
+	fw_task_ctx->ystorm_st_context.state.reuse_count =
+						     qedi->tid_reuse_count[tid];
+	fw_task_ctx->mstorm_st_context.reuse_count =
+						   qedi->tid_reuse_count[tid]++;
+
+	/* Ustorm context */
+	fw_task_ctx->ustorm_st_context.rem_rcv_len = scsi_bufflen(sc);
+	fw_task_ctx->ustorm_st_context.exp_data_transfer_len = scsi_bufflen(sc);
+	fw_task_ctx->ustorm_st_context.exp_data_sn =
+						   be32_to_cpu(hdr->exp_statsn);
+	fw_task_ctx->ustorm_st_context.task_type = task_type;
+	fw_task_ctx->ustorm_st_context.cq_rss_number = cq_idx;
+	fw_task_ctx->ustorm_ag_context.icid = (u16)qedi_conn->iscsi_conn_id;
+
+	SET_FIELD(fw_task_ctx->ustorm_ag_context.flags1,
+		  USTORM_ISCSI_TASK_AG_CTX_R2T2RECV, 1);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.flags,
+		  USTORM_ISCSI_TASK_ST_CTX_LOCAL_COMP, 0);
+
+	num_fast_sgs = (cmd->io_tbl.sge_valid ?
+			min((u16)QEDI_FAST_SGE_COUNT,
+			    (u16)cmd->io_tbl.sge_valid) : 0);
+	SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+		  ISCSI_REG1_NUM_FAST_SGES, num_fast_sgs);
+
+	fw_task_ctx->ustorm_st_context.lun.lo = be32_to_cpu(lun[0]);
+	fw_task_ctx->ustorm_st_context.lun.hi = be32_to_cpu(lun[1]);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "Total sge count [%d]\n",
+		  cmd->io_tbl.sge_valid);
+
+	yst_cxt = &fw_task_ctx->ystorm_st_context;
+	mst_cxt = &fw_task_ctx->mstorm_st_context;
+	/* Tx path */
+	if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
+		/* not considering  superIO or FastIO */
+		if (cmd->io_tbl.sge_valid == 1) {
+			cached_sge = &yst_cxt->state.sgl_ctx_union.cached_sge;
+			cached_sge->sge.sge_addr.lo = bd[0].sge_addr.lo;
+			cached_sge->sge.sge_addr.hi = bd[0].sge_addr.hi;
+			cached_sge->sge.sge_len = bd[0].sge_len;
+			qedi->cached_sgls++;
+		} else if ((cmd->io_tbl.sge_valid != 1) && cmd->use_slowpath) {
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 1);
+			SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+				  ISCSI_REG1_NUM_FAST_SGES, 0);
+			phys_sgl = &yst_cxt->state.sgl_ctx_union.phys_sgl;
+			phys_sgl->sgl_base.lo = (u32)(cmd->io_tbl.sge_tbl_dma);
+			phys_sgl->sgl_base.hi =
+				     (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
+			phys_sgl->sgl_size = cmd->io_tbl.sge_valid;
+			qedi->slow_sgls++;
+		} else if ((cmd->io_tbl.sge_valid != 1) && !cmd->use_slowpath) {
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 0);
+			SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+				  ISCSI_REG1_NUM_FAST_SGES,
+				  min((u16)QEDI_FAST_SGE_COUNT,
+				      (u16)cmd->io_tbl.sge_valid));
+			virt_sgl = &yst_cxt->state.sgl_ctx_union.virt_sgl;
+			virt_sgl->sgl_base.lo = (u32)(cmd->io_tbl.sge_tbl_dma);
+			virt_sgl->sgl_base.hi =
+				      (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
+			virt_sgl->sgl_initial_offset =
+				 (u32)bd[0].sge_addr.lo & (QEDI_PAGE_SIZE - 1);
+			qedi->fast_sgls++;
+		}
+		fw_task_ctx->mstorm_st_context.sgl_size = cmd->io_tbl.sge_valid;
+		fw_task_ctx->mstorm_st_context.rem_task_size = scsi_bufflen(sc);
+	} else {
+	/* Rx path */
+		if (cmd->io_tbl.sge_valid == 1) {
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 0);
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SINGLE_SGE, 1);
+			single_sge = &mst_cxt->sgl_union.single_sge;
+			single_sge->sge_addr.lo = bd[0].sge_addr.lo;
+			single_sge->sge_addr.hi = bd[0].sge_addr.hi;
+			single_sge->sge_len = bd[0].sge_len;
+			qedi->cached_sgls++;
+		} else if ((cmd->io_tbl.sge_valid != 1) && cmd->use_slowpath) {
+			sgl_struct = &mst_cxt->sgl_union.sgl_struct;
+			sgl_struct->sgl_addr.lo =
+						(u32)(cmd->io_tbl.sge_tbl_dma);
+			sgl_struct->sgl_addr.hi =
+				     (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 1);
+			SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+				  ISCSI_REG1_NUM_FAST_SGES, 0);
+			sgl_struct->updated_sge_size = 0;
+			sgl_struct->updated_sge_offset = 0;
+			qedi->slow_sgls++;
+		} else if ((cmd->io_tbl.sge_valid != 1) && !cmd->use_slowpath) {
+			sgl_struct = &mst_cxt->sgl_union.sgl_struct;
+			sgl_struct->sgl_addr.lo =
+						(u32)(cmd->io_tbl.sge_tbl_dma);
+			sgl_struct->sgl_addr.hi =
+				     (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
+			sgl_struct->byte_offset =
+				(u32)bd[0].sge_addr.lo & (QEDI_PAGE_SIZE - 1);
+			SET_FIELD(fw_task_ctx->mstorm_st_context.flags.mflags,
+				  ISCSI_MFLAGS_SLOW_IO, 0);
+			SET_FIELD(fw_task_ctx->ustorm_st_context.reg1.reg1_map,
+				  ISCSI_REG1_NUM_FAST_SGES, 0);
+			sgl_struct->updated_sge_size = 0;
+			sgl_struct->updated_sge_offset = 0;
+			qedi->fast_sgls++;
+		}
+		fw_task_ctx->mstorm_st_context.sgl_size = cmd->io_tbl.sge_valid;
+		fw_task_ctx->mstorm_st_context.rem_task_size = scsi_bufflen(sc);
+	}
+
+	if (cmd->io_tbl.sge_valid == 1)
+		/* Singel-SGL */
+		qedi->use_cached_sge = true;
+	else {
+		if (cmd->use_slowpath)
+			qedi->use_slow_sge = true;
+		else
+			qedi->use_fast_sge = true;
+	}
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
+		  "%s: %s-SGL: num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x",
+		  (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
+		  "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
+		  "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
+		  (u16)cmd->io_tbl.sge_valid, (u32)(cmd->io_tbl.sge_tbl_dma),
+		  (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
+
+	/*  Add command in active command list */
+	spin_lock(&qedi_conn->list_lock);
+	list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
+	cmd->io_cmd_in_list = true;
+	qedi_conn->active_cmd_count++;
+	spin_unlock(&qedi_conn->list_lock);
+
+	qedi_add_to_sq(qedi_conn, task, tid, ptu_invalidate, false);
+	qedi_ring_doorbell(qedi_conn);
+	if (qedi_io_tracing)
+		qedi_trace_io(qedi, task, tid, QEDI_IO_TRACE_REQ);
+
+	return 0;
+}
+
+int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
+{
+	struct iscsi_conn *conn = task->conn;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_cmd *cmd = task->dd_data;
+	s16 ptu_invalidate = 0;
+
+	QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
+		  "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
+		  cmd->task_id, get_itt(task->itt), task->state,
+		  cmd->state, qedi_conn->iscsi_conn_id);
+
+	qedi_add_to_sq(qedi_conn, task, cmd->task_id, ptu_invalidate, true);
+	qedi_ring_doorbell(qedi_conn);
+
+	return 0;
+}

drivers/scsi/qedi/qedi_gbl.h

@@ -0,0 +1,73 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#ifndef _QEDI_GBL_H_
+#define _QEDI_GBL_H_
+
+#include "qedi_iscsi.h"
+
+extern uint qedi_io_tracing;
+extern int do_not_recover;
+extern struct scsi_host_template qedi_host_template;
+extern struct iscsi_transport qedi_iscsi_transport;
+extern const struct qed_iscsi_ops *qedi_ops;
+extern struct qedi_debugfs_ops qedi_debugfs_ops;
+extern const struct file_operations qedi_dbg_fops;
+extern struct device_attribute *qedi_shost_attrs[];
+
+int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep);
+void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep);
+
+int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *task);
+int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task);
+int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
+			  struct iscsi_task *mtask);
+int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
+			 struct iscsi_task *task);
+int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
+			   struct iscsi_task *task,
+			   char *datap, int data_len, int unsol);
+int qedi_iscsi_send_ioreq(struct iscsi_task *task);
+int qedi_get_task_idx(struct qedi_ctx *qedi);
+void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx);
+int qedi_iscsi_cleanup_task(struct iscsi_task *task,
+			    bool mark_cmd_node_deleted);
+void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd);
+void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
+			 struct qedi_cmd *qedi_cmd);
+void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt);
+void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, int16_t *tid);
+void qedi_process_iscsi_error(struct qedi_endpoint *ep,
+			      struct async_data *data);
+void qedi_start_conn_recovery(struct qedi_ctx *qedi,
+			      struct qedi_conn *qedi_conn);
+struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid);
+void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data);
+void qedi_mark_device_missing(struct iscsi_cls_session *cls_session);
+void qedi_mark_device_available(struct iscsi_cls_session *cls_session);
+void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu);
+int qedi_recover_all_conns(struct qedi_ctx *qedi);
+void qedi_fp_process_cqes(struct qedi_work *work);
+int qedi_cleanup_all_io(struct qedi_ctx *qedi,
+			struct qedi_conn *qedi_conn,
+			struct iscsi_task *task, bool in_recovery);
+void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
+		   u16 tid, int8_t direction);
+int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id);
+u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl);
+void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id);
+int qedi_create_sysfs_ctx_attr(struct qedi_ctx *qedi);
+void qedi_remove_sysfs_ctx_attr(struct qedi_ctx *qedi);
+void qedi_clearsq(struct qedi_ctx *qedi,
+		  struct qedi_conn *qedi_conn,
+		  struct iscsi_task *task);
+
+#endif

drivers/scsi/qedi/qedi_hsi.h

@@ -0,0 +1,52 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+#ifndef __QEDI_HSI__
+#define __QEDI_HSI__
+/*
+ * Add include to common target
+ */
+#include <linux/qed/common_hsi.h>
+
+/*
+ * Add include to common storage target
+ */
+#include <linux/qed/storage_common.h>
+
+/*
+ * Add include to common TCP target
+ */
+#include <linux/qed/tcp_common.h>
+
+/*
+ * Add include to common iSCSI target for both eCore and protocol driver
+ */
+#include <linux/qed/iscsi_common.h>
+
+/*
+ * iSCSI CMDQ element
+ */
+struct iscsi_cmdqe {
+	__le16 conn_id;
+	u8 invalid_command;
+	u8 cmd_hdr_type;
+	__le32 reserved1[2];
+	__le32 cmd_payload[13];
+};
+
+/*
+ * iSCSI CMD header type
+ */
+enum iscsi_cmd_hdr_type {
+	ISCSI_CMD_HDR_TYPE_BHS_ONLY /* iSCSI BHS with no expected AHS */,
+	ISCSI_CMD_HDR_TYPE_BHS_W_AHS /* iSCSI BHS with expected AHS */,
+	ISCSI_CMD_HDR_TYPE_AHS /* iSCSI AHS */,
+	MAX_ISCSI_CMD_HDR_TYPE
+};
+
+#endif /* __QEDI_HSI__ */

drivers/scsi/qedi/qedi_iscsi.c

@@ -0,0 +1,1624 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#include <linux/blkdev.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <scsi/scsi_tcq.h>
+
+#include "qedi.h"
+#include "qedi_iscsi.h"
+#include "qedi_gbl.h"
+
+int qedi_recover_all_conns(struct qedi_ctx *qedi)
+{
+	struct qedi_conn *qedi_conn;
+	int i;
+
+	for (i = 0; i < qedi->max_active_conns; i++) {
+		qedi_conn = qedi_get_conn_from_id(qedi, i);
+		if (!qedi_conn)
+			continue;
+
+		qedi_start_conn_recovery(qedi, qedi_conn);
+	}
+
+	return SUCCESS;
+}
+
+static int qedi_eh_host_reset(struct scsi_cmnd *cmd)
+{
+	struct Scsi_Host *shost = cmd->device->host;
+	struct qedi_ctx *qedi;
+
+	qedi = iscsi_host_priv(shost);
+
+	return qedi_recover_all_conns(qedi);
+}
+
+struct scsi_host_template qedi_host_template = {
+	.module = THIS_MODULE,
+	.name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver",
+	.proc_name = QEDI_MODULE_NAME,
+	.queuecommand = iscsi_queuecommand,
+	.eh_abort_handler = iscsi_eh_abort,
+	.eh_device_reset_handler = iscsi_eh_device_reset,
+	.eh_target_reset_handler = iscsi_eh_recover_target,
+	.eh_host_reset_handler = qedi_eh_host_reset,
+	.target_alloc = iscsi_target_alloc,
+	.change_queue_depth = scsi_change_queue_depth,
+	.can_queue = QEDI_MAX_ISCSI_TASK,
+	.this_id = -1,
+	.sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD,
+	.max_sectors = 0xffff,
+	.cmd_per_lun = 128,
+	.use_clustering = ENABLE_CLUSTERING,
+	.shost_attrs = qedi_shost_attrs,
+};
+
+static void qedi_conn_free_login_resources(struct qedi_ctx *qedi,
+					   struct qedi_conn *qedi_conn)
+{
+	if (qedi_conn->gen_pdu.resp_bd_tbl) {
+		dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+				  qedi_conn->gen_pdu.resp_bd_tbl,
+				  qedi_conn->gen_pdu.resp_bd_dma);
+		qedi_conn->gen_pdu.resp_bd_tbl = NULL;
+	}
+
+	if (qedi_conn->gen_pdu.req_bd_tbl) {
+		dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+				  qedi_conn->gen_pdu.req_bd_tbl,
+				  qedi_conn->gen_pdu.req_bd_dma);
+		qedi_conn->gen_pdu.req_bd_tbl = NULL;
+	}
+
+	if (qedi_conn->gen_pdu.resp_buf) {
+		dma_free_coherent(&qedi->pdev->dev,
+				  ISCSI_DEF_MAX_RECV_SEG_LEN,
+				  qedi_conn->gen_pdu.resp_buf,
+				  qedi_conn->gen_pdu.resp_dma_addr);
+		qedi_conn->gen_pdu.resp_buf = NULL;
+	}
+
+	if (qedi_conn->gen_pdu.req_buf) {
+		dma_free_coherent(&qedi->pdev->dev,
+				  ISCSI_DEF_MAX_RECV_SEG_LEN,
+				  qedi_conn->gen_pdu.req_buf,
+				  qedi_conn->gen_pdu.req_dma_addr);
+		qedi_conn->gen_pdu.req_buf = NULL;
+	}
+}
+
+static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi,
+					   struct qedi_conn *qedi_conn)
+{
+	qedi_conn->gen_pdu.req_buf =
+		dma_alloc_coherent(&qedi->pdev->dev,
+				   ISCSI_DEF_MAX_RECV_SEG_LEN,
+				   &qedi_conn->gen_pdu.req_dma_addr,
+				   GFP_KERNEL);
+	if (!qedi_conn->gen_pdu.req_buf)
+		goto login_req_buf_failure;
+
+	qedi_conn->gen_pdu.req_buf_size = 0;
+	qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf;
+
+	qedi_conn->gen_pdu.resp_buf =
+		dma_alloc_coherent(&qedi->pdev->dev,
+				   ISCSI_DEF_MAX_RECV_SEG_LEN,
+				   &qedi_conn->gen_pdu.resp_dma_addr,
+				   GFP_KERNEL);
+	if (!qedi_conn->gen_pdu.resp_buf)
+		goto login_resp_buf_failure;
+
+	qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
+	qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf;
+
+	qedi_conn->gen_pdu.req_bd_tbl =
+		dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+				   &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
+	if (!qedi_conn->gen_pdu.req_bd_tbl)
+		goto login_req_bd_tbl_failure;
+
+	qedi_conn->gen_pdu.resp_bd_tbl =
+		dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+				   &qedi_conn->gen_pdu.resp_bd_dma,
+				   GFP_KERNEL);
+	if (!qedi_conn->gen_pdu.resp_bd_tbl)
+		goto login_resp_bd_tbl_failure;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS,
+		  "Allocation successful, cid=0x%x\n",
+		  qedi_conn->iscsi_conn_id);
+	return 0;
+
+login_resp_bd_tbl_failure:
+	dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
+			  qedi_conn->gen_pdu.req_bd_tbl,
+			  qedi_conn->gen_pdu.req_bd_dma);
+	qedi_conn->gen_pdu.req_bd_tbl = NULL;
+
+login_req_bd_tbl_failure:
+	dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
+			  qedi_conn->gen_pdu.resp_buf,
+			  qedi_conn->gen_pdu.resp_dma_addr);
+	qedi_conn->gen_pdu.resp_buf = NULL;
+login_resp_buf_failure:
+	dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
+			  qedi_conn->gen_pdu.req_buf,
+			  qedi_conn->gen_pdu.req_dma_addr);
+	qedi_conn->gen_pdu.req_buf = NULL;
+login_req_buf_failure:
+	iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data,
+			  "login resource alloc failed!!\n");
+	return -ENOMEM;
+}
+
+static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi,
+				  struct iscsi_session *session)
+{
+	int i;
+
+	for (i = 0; i < session->cmds_max; i++) {
+		struct iscsi_task *task = session->cmds[i];
+		struct qedi_cmd *cmd = task->dd_data;
+
+		if (cmd->io_tbl.sge_tbl)
+			dma_free_coherent(&qedi->pdev->dev,
+					  QEDI_ISCSI_MAX_BDS_PER_CMD *
+					  sizeof(struct iscsi_sge),
+					  cmd->io_tbl.sge_tbl,
+					  cmd->io_tbl.sge_tbl_dma);
+
+		if (cmd->sense_buffer)
+			dma_free_coherent(&qedi->pdev->dev,
+					  SCSI_SENSE_BUFFERSIZE,
+					  cmd->sense_buffer,
+					  cmd->sense_buffer_dma);
+	}
+}
+
+static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session,
+			   struct qedi_cmd *cmd)
+{
+	struct qedi_io_bdt *io = &cmd->io_tbl;
+	struct iscsi_sge *sge;
+
+	io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev,
+					 QEDI_ISCSI_MAX_BDS_PER_CMD *
+					 sizeof(*sge),
+					 &io->sge_tbl_dma, GFP_KERNEL);
+	if (!io->sge_tbl) {
+		iscsi_session_printk(KERN_ERR, session,
+				     "Could not allocate BD table.\n");
+		return -ENOMEM;
+	}
+
+	io->sge_valid = 0;
+	return 0;
+}
+
+static int qedi_setup_cmd_pool(struct qedi_ctx *qedi,
+			       struct iscsi_session *session)
+{
+	int i;
+
+	for (i = 0; i < session->cmds_max; i++) {
+		struct iscsi_task *task = session->cmds[i];
+		struct qedi_cmd *cmd = task->dd_data;
+
+		task->hdr = &cmd->hdr;
+		task->hdr_max = sizeof(struct iscsi_hdr);
+
+		if (qedi_alloc_sget(qedi, session, cmd))
+			goto free_sgets;
+
+		cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev,
+						       SCSI_SENSE_BUFFERSIZE,
+						       &cmd->sense_buffer_dma,
+						       GFP_KERNEL);
+		if (!cmd->sense_buffer)
+			goto free_sgets;
+	}
+
+	return 0;
+
+free_sgets:
+	qedi_destroy_cmd_pool(qedi, session);
+	return -ENOMEM;
+}
+
+static struct iscsi_cls_session *
+qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max,
+		    u16 qdepth, uint32_t initial_cmdsn)
+{
+	struct Scsi_Host *shost;
+	struct iscsi_cls_session *cls_session;
+	struct qedi_ctx *qedi;
+	struct qedi_endpoint *qedi_ep;
+
+	if (!ep)
+		return NULL;
+
+	qedi_ep = ep->dd_data;
+	shost = qedi_ep->qedi->shost;
+	qedi = iscsi_host_priv(shost);
+
+	if (cmds_max > qedi->max_sqes)
+		cmds_max = qedi->max_sqes;
+	else if (cmds_max < QEDI_SQ_WQES_MIN)
+		cmds_max = QEDI_SQ_WQES_MIN;
+
+	cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost,
+					  cmds_max, 0, sizeof(struct qedi_cmd),
+					  initial_cmdsn, ISCSI_MAX_TARGET);
+	if (!cls_session) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failed to setup session for ep=%p\n", qedi_ep);
+		return NULL;
+	}
+
+	if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failed to setup cmd pool for ep=%p\n", qedi_ep);
+		goto session_teardown;
+	}
+
+	return cls_session;
+
+session_teardown:
+	iscsi_session_teardown(cls_session);
+	return NULL;
+}
+
+static void qedi_session_destroy(struct iscsi_cls_session *cls_session)
+{
+	struct iscsi_session *session = cls_session->dd_data;
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct qedi_ctx *qedi = iscsi_host_priv(shost);
+
+	qedi_destroy_cmd_pool(qedi, session);
+	iscsi_session_teardown(cls_session);
+}
+
+static struct iscsi_cls_conn *
+qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
+{
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct qedi_ctx *qedi = iscsi_host_priv(shost);
+	struct iscsi_cls_conn *cls_conn;
+	struct qedi_conn *qedi_conn;
+	struct iscsi_conn *conn;
+
+	cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn),
+				    cid);
+	if (!cls_conn) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n",
+			 cid, cls_session);
+		return NULL;
+	}
+
+	conn = cls_conn->dd_data;
+	qedi_conn = conn->dd_data;
+	qedi_conn->cls_conn = cls_conn;
+	qedi_conn->qedi = qedi;
+	qedi_conn->ep = NULL;
+	qedi_conn->active_cmd_count = 0;
+	INIT_LIST_HEAD(&qedi_conn->active_cmd_list);
+	spin_lock_init(&qedi_conn->list_lock);
+
+	if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) {
+		iscsi_conn_printk(KERN_ALERT, conn,
+				  "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n",
+				   cid, cls_session);
+		goto free_conn;
+	}
+
+	return cls_conn;
+
+free_conn:
+	iscsi_conn_teardown(cls_conn);
+	return NULL;
+}
+
+void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
+{
+	iscsi_block_session(cls_session);
+}
+
+void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
+{
+	iscsi_unblock_session(cls_session);
+}
+
+static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi,
+				       struct qedi_conn *qedi_conn)
+{
+	u32 iscsi_cid = qedi_conn->iscsi_conn_id;
+
+	if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) {
+		iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
+				  "conn bind - entry #%d not free\n",
+				  iscsi_cid);
+		return -EBUSY;
+	}
+
+	qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn;
+	return 0;
+}
+
+struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid)
+{
+	if (!qedi->cid_que.conn_cid_tbl) {
+		QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n");
+		return NULL;
+
+	} else if (iscsi_cid >= qedi->max_active_conns) {
+		QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid);
+		return NULL;
+	}
+	return qedi->cid_que.conn_cid_tbl[iscsi_cid];
+}
+
+static int qedi_conn_bind(struct iscsi_cls_session *cls_session,
+			  struct iscsi_cls_conn *cls_conn,
+			  u64 transport_fd, int is_leading)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+	struct qedi_ctx *qedi = iscsi_host_priv(shost);
+	struct qedi_endpoint *qedi_ep;
+	struct iscsi_endpoint *ep;
+
+	ep = iscsi_lookup_endpoint(transport_fd);
+	if (!ep)
+		return -EINVAL;
+
+	qedi_ep = ep->dd_data;
+	if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) ||
+	    (qedi_ep->state == EP_STATE_TCP_RST_RCVD))
+		return -EINVAL;
+
+	if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
+		return -EINVAL;
+
+	qedi_ep->conn = qedi_conn;
+	qedi_conn->ep = qedi_ep;
+	qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
+	qedi_conn->fw_cid = qedi_ep->fw_cid;
+	qedi_conn->cmd_cleanup_req = 0;
+	qedi_conn->cmd_cleanup_cmpl = 0;
+
+	if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
+		return -EINVAL;
+
+	spin_lock_init(&qedi_conn->tmf_work_lock);
+	INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
+	init_waitqueue_head(&qedi_conn->wait_queue);
+	return 0;
+}
+
+static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
+				  struct qedi_conn *qedi_conn)
+{
+	struct qed_iscsi_params_update *conn_info;
+	struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qedi_endpoint *qedi_ep;
+	int rval;
+
+	qedi_ep = qedi_conn->ep;
+
+	conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
+	if (!conn_info) {
+		QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
+		return -ENOMEM;
+	}
+
+	conn_info->update_flag = 0;
+
+	if (conn->hdrdgst_en)
+		SET_FIELD(conn_info->update_flag,
+			  ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
+	if (conn->datadgst_en)
+		SET_FIELD(conn_info->update_flag,
+			  ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
+	if (conn->session->initial_r2t_en)
+		SET_FIELD(conn_info->update_flag,
+			  ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
+			  true);
+	if (conn->session->imm_data_en)
+		SET_FIELD(conn_info->update_flag,
+			  ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
+			  true);
+
+	conn_info->max_seq_size = conn->session->max_burst;
+	conn_info->max_recv_pdu_length = conn->max_recv_dlength;
+	conn_info->max_send_pdu_length = conn->max_xmit_dlength;
+	conn_info->first_seq_length = conn->session->first_burst;
+	conn_info->exp_stat_sn = conn->exp_statsn;
+
+	rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
+				     conn_info);
+	if (rval) {
+		rval = -ENXIO;
+		QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
+		goto update_conn_err;
+	}
+
+	kfree(conn_info);
+	rval = 0;
+
+update_conn_err:
+	return rval;
+}
+
+static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
+{
+	u16 mss = 0;
+	u16 hdrs = TCP_HDR_LEN;
+
+	if (is_ipv6)
+		hdrs += IPV6_HDR_LEN;
+	else
+		hdrs += IPV4_HDR_LEN;
+
+	if (vlan_en)
+		hdrs += VLAN_LEN;
+
+	mss = pmtu - hdrs;
+
+	if (tcp_ts_en)
+		mss -= TCP_OPTION_LEN;
+
+	if (!mss)
+		mss = DEF_MSS;
+
+	return mss;
+}
+
+static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
+{
+	struct qedi_ctx *qedi = qedi_ep->qedi;
+	struct qed_iscsi_params_offload *conn_info;
+	int rval;
+	int i;
+
+	conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
+	if (!conn_info) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failed to allocate memory ep=%p\n", qedi_ep);
+		return -ENOMEM;
+	}
+
+	ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
+	ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
+
+	conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
+	conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
+
+	if (qedi_ep->ip_type == TCP_IPV4) {
+		conn_info->ip_version = 0;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
+			  qedi_ep->src_addr, qedi_ep->dst_addr);
+	} else {
+		for (i = 1; i < 4; i++) {
+			conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
+			conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
+		}
+
+		conn_info->ip_version = 1;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
+			  qedi_ep->src_addr, qedi_ep->dst_addr);
+	}
+
+	conn_info->src.port = qedi_ep->src_port;
+	conn_info->dst.port = qedi_ep->dst_port;
+
+	conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
+	conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
+	conn_info->vlan_id = qedi_ep->vlan_id;
+
+	SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
+	SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
+	SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
+	SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
+
+	conn_info->default_cq = (qedi_ep->fw_cid % 8);
+
+	conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
+	conn_info->dup_ack_theshold = 3;
+	conn_info->rcv_wnd = 65535;
+	conn_info->cwnd = DEF_MAX_CWND;
+
+	conn_info->ss_thresh = 65535;
+	conn_info->srtt = 300;
+	conn_info->rtt_var = 150;
+	conn_info->flow_label = 0;
+	conn_info->ka_timeout = DEF_KA_TIMEOUT;
+	conn_info->ka_interval = DEF_KA_INTERVAL;
+	conn_info->max_rt_time = DEF_MAX_RT_TIME;
+	conn_info->ttl = DEF_TTL;
+	conn_info->tos_or_tc = DEF_TOS;
+	conn_info->remote_port = qedi_ep->dst_port;
+	conn_info->local_port = qedi_ep->src_port;
+
+	conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
+				       (qedi_ep->ip_type == TCP_IPV6),
+				       1, (qedi_ep->vlan_id != 0));
+
+	conn_info->rcv_wnd_scale = 4;
+	conn_info->ts_ticks_per_second = 1000;
+	conn_info->da_timeout_value = 200;
+	conn_info->ack_frequency = 2;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "Default cq index [%d], mss [%d]\n",
+		  conn_info->default_cq, conn_info->mss);
+
+	rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
+	if (rval)
+		QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
+			 rval, qedi_ep);
+
+	kfree(conn_info);
+	return rval;
+}
+
+static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_ctx *qedi;
+	int rval;
+
+	qedi = qedi_conn->qedi;
+
+	rval = qedi_iscsi_update_conn(qedi, qedi_conn);
+	if (rval) {
+		iscsi_conn_printk(KERN_ALERT, conn,
+				  "conn_start: FW oflload conn failed.\n");
+		rval = -EINVAL;
+		goto start_err;
+	}
+
+	clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
+	qedi_conn->abrt_conn = 0;
+
+	rval = iscsi_conn_start(cls_conn);
+	if (rval) {
+		iscsi_conn_printk(KERN_ALERT, conn,
+				  "iscsi_conn_start: FW oflload conn failed!!\n");
+	}
+
+start_err:
+	return rval;
+}
+
+static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct Scsi_Host *shost;
+	struct qedi_ctx *qedi;
+
+	shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
+	qedi = iscsi_host_priv(shost);
+
+	qedi_conn_free_login_resources(qedi, qedi_conn);
+	iscsi_conn_teardown(cls_conn);
+}
+
+static int qedi_ep_get_param(struct iscsi_endpoint *ep,
+			     enum iscsi_param param, char *buf)
+{
+	struct qedi_endpoint *qedi_ep = ep->dd_data;
+	int len;
+
+	if (!qedi_ep)
+		return -ENOTCONN;
+
+	switch (param) {
+	case ISCSI_PARAM_CONN_PORT:
+		len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
+		break;
+	case ISCSI_PARAM_CONN_ADDRESS:
+		if (qedi_ep->ip_type == TCP_IPV4)
+			len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
+		else
+			len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
+		break;
+	default:
+		return -ENOTCONN;
+	}
+
+	return len;
+}
+
+static int qedi_host_get_param(struct Scsi_Host *shost,
+			       enum iscsi_host_param param, char *buf)
+{
+	struct qedi_ctx *qedi;
+	int len;
+
+	qedi = iscsi_host_priv(shost);
+
+	switch (param) {
+	case ISCSI_HOST_PARAM_HWADDRESS:
+		len = sysfs_format_mac(buf, qedi->mac, 6);
+		break;
+	case ISCSI_HOST_PARAM_NETDEV_NAME:
+		len = sprintf(buf, "host%d\n", shost->host_no);
+		break;
+	case ISCSI_HOST_PARAM_IPADDRESS:
+		if (qedi->ip_type == TCP_IPV4)
+			len = sprintf(buf, "%pI4\n", qedi->src_ip);
+		else
+			len = sprintf(buf, "%pI6\n", qedi->src_ip);
+		break;
+	default:
+		return iscsi_host_get_param(shost, param, buf);
+	}
+
+	return len;
+}
+
+static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
+				struct iscsi_stats *stats)
+{
+	struct iscsi_conn *conn = cls_conn->dd_data;
+	struct qed_iscsi_stats iscsi_stats;
+	struct Scsi_Host *shost;
+	struct qedi_ctx *qedi;
+
+	shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
+	qedi = iscsi_host_priv(shost);
+	qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
+
+	conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
+	conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
+	conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
+	conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
+	conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
+
+	stats->txdata_octets = conn->txdata_octets;
+	stats->rxdata_octets = conn->rxdata_octets;
+	stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
+	stats->dataout_pdus = conn->dataout_pdus_cnt;
+	stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
+	stats->datain_pdus = conn->datain_pdus_cnt;
+	stats->r2t_pdus = conn->r2t_pdus_cnt;
+	stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
+	stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
+	stats->digest_err = 0;
+	stats->timeout_err = 0;
+	strcpy(stats->custom[0].desc, "eh_abort_cnt");
+	stats->custom[0].value = conn->eh_abort_cnt;
+	stats->custom_length = 1;
+}
+
+static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
+{
+	struct iscsi_sge *bd_tbl;
+
+	bd_tbl = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
+
+	bd_tbl->sge_addr.hi =
+		(u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
+	bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
+	bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
+				qedi_conn->gen_pdu.req_buf;
+	bd_tbl->reserved0 = 0;
+	bd_tbl = (struct iscsi_sge  *)qedi_conn->gen_pdu.resp_bd_tbl;
+	bd_tbl->sge_addr.hi =
+			(u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
+	bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
+	bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
+	bd_tbl->reserved0 = 0;
+}
+
+static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
+{
+	struct qedi_cmd *cmd = task->dd_data;
+	struct qedi_conn *qedi_conn = cmd->conn;
+	char *buf;
+	int data_len;
+	int rc = 0;
+
+	qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
+	switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
+	case ISCSI_OP_LOGIN:
+		qedi_send_iscsi_login(qedi_conn, task);
+		break;
+	case ISCSI_OP_NOOP_OUT:
+		data_len = qedi_conn->gen_pdu.req_buf_size;
+		buf = qedi_conn->gen_pdu.req_buf;
+		if (data_len)
+			rc = qedi_send_iscsi_nopout(qedi_conn, task,
+						    buf, data_len, 1);
+		else
+			rc = qedi_send_iscsi_nopout(qedi_conn, task,
+						    NULL, 0, 1);
+		break;
+	case ISCSI_OP_LOGOUT:
+		rc = qedi_send_iscsi_logout(qedi_conn, task);
+		break;
+	case ISCSI_OP_SCSI_TMFUNC:
+		rc = qedi_iscsi_abort_work(qedi_conn, task);
+		break;
+	case ISCSI_OP_TEXT:
+		rc = qedi_send_iscsi_text(qedi_conn, task);
+		break;
+	default:
+		iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
+				  "unsupported op 0x%x\n", task->hdr->opcode);
+	}
+
+	return rc;
+}
+
+static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
+{
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_cmd *cmd = task->dd_data;
+
+	memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
+
+	qedi_conn->gen_pdu.req_buf_size = task->data_count;
+
+	if (task->data_count) {
+		memcpy(qedi_conn->gen_pdu.req_buf, task->data,
+		       task->data_count);
+		qedi_conn->gen_pdu.req_wr_ptr =
+			qedi_conn->gen_pdu.req_buf + task->data_count;
+	}
+
+	cmd->conn = conn->dd_data;
+	cmd->scsi_cmd = NULL;
+	return qedi_iscsi_send_generic_request(task);
+}
+
+static int qedi_task_xmit(struct iscsi_task *task)
+{
+	struct iscsi_conn *conn = task->conn;
+	struct qedi_conn *qedi_conn = conn->dd_data;
+	struct qedi_cmd *cmd = task->dd_data;
+	struct scsi_cmnd *sc = task->sc;
+
+	cmd->state = 0;
+	cmd->task = NULL;
+	cmd->use_slowpath = false;
+	cmd->conn = qedi_conn;
+	cmd->task = task;
+	cmd->io_cmd_in_list = false;
+	INIT_LIST_HEAD(&cmd->io_cmd);
+
+	if (!sc)
+		return qedi_mtask_xmit(conn, task);
+
+	cmd->scsi_cmd = sc;
+	return qedi_iscsi_send_ioreq(task);
+}
+
+static struct iscsi_endpoint *
+qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
+		int non_blocking)
+{
+	struct qedi_ctx *qedi;
+	struct iscsi_endpoint *ep;
+	struct qedi_endpoint *qedi_ep;
+	struct sockaddr_in *addr;
+	struct sockaddr_in6 *addr6;
+	struct qed_dev *cdev  =  NULL;
+	struct qedi_uio_dev *udev = NULL;
+	struct iscsi_path path_req;
+	u32 msg_type = ISCSI_KEVENT_IF_DOWN;
+	u32 iscsi_cid = QEDI_CID_RESERVED;
+	u16 len = 0;
+	char *buf = NULL;
+	int ret;
+
+	if (!shost) {
+		ret = -ENXIO;
+		QEDI_ERR(NULL, "shost is NULL\n");
+		return ERR_PTR(ret);
+	}
+
+	if (do_not_recover) {
+		ret = -ENOMEM;
+		return ERR_PTR(ret);
+	}
+
+	qedi = iscsi_host_priv(shost);
+	cdev = qedi->cdev;
+	udev = qedi->udev;
+
+	if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
+	    test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
+		ret = -ENOMEM;
+		return ERR_PTR(ret);
+	}
+
+	ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
+	if (!ep) {
+		QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
+		ret = -ENOMEM;
+		return ERR_PTR(ret);
+	}
+	qedi_ep = ep->dd_data;
+	memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
+	qedi_ep->state = EP_STATE_IDLE;
+	qedi_ep->iscsi_cid = (u32)-1;
+	qedi_ep->qedi = qedi;
+
+	if (dst_addr->sa_family == AF_INET) {
+		addr = (struct sockaddr_in *)dst_addr;
+		memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
+		       sizeof(struct in_addr));
+		qedi_ep->dst_port = ntohs(addr->sin_port);
+		qedi_ep->ip_type = TCP_IPV4;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "dst_addr=%pI4, dst_port=%u\n",
+			  qedi_ep->dst_addr, qedi_ep->dst_port);
+	} else if (dst_addr->sa_family == AF_INET6) {
+		addr6 = (struct sockaddr_in6 *)dst_addr;
+		memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
+		       sizeof(struct in6_addr));
+		qedi_ep->dst_port = ntohs(addr6->sin6_port);
+		qedi_ep->ip_type = TCP_IPV6;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "dst_addr=%pI6, dst_port=%u\n",
+			  qedi_ep->dst_addr, qedi_ep->dst_port);
+	} else {
+		QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
+	}
+
+	if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
+		QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
+		ret = -ENXIO;
+		goto ep_conn_exit;
+	}
+
+	ret = qedi_alloc_sq(qedi, qedi_ep);
+	if (ret)
+		goto ep_conn_exit;
+
+	ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
+				     &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
+
+	if (ret) {
+		QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
+		ret = -ENXIO;
+		goto ep_free_sq;
+	}
+
+	iscsi_cid = qedi_ep->handle;
+	qedi_ep->iscsi_cid = iscsi_cid;
+
+	init_waitqueue_head(&qedi_ep->ofld_wait);
+	init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
+	qedi_ep->state = EP_STATE_OFLDCONN_START;
+	qedi->ep_tbl[iscsi_cid] = qedi_ep;
+
+	buf = (char *)&path_req;
+	len = sizeof(path_req);
+	memset(&path_req, 0, len);
+
+	msg_type = ISCSI_KEVENT_PATH_REQ;
+	path_req.handle = (u64)qedi_ep->iscsi_cid;
+	path_req.pmtu = qedi->ll2_mtu;
+	qedi_ep->pmtu = qedi->ll2_mtu;
+	if (qedi_ep->ip_type == TCP_IPV4) {
+		memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
+		       sizeof(struct in_addr));
+		path_req.ip_addr_len = 4;
+	} else {
+		memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
+		       sizeof(struct in6_addr));
+		path_req.ip_addr_len = 16;
+	}
+
+	ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
+				 len);
+	if (ret) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
+			 iscsi_cid, ret);
+		goto ep_rel_conn;
+	}
+
+	atomic_inc(&qedi->num_offloads);
+	return ep;
+
+ep_rel_conn:
+	qedi->ep_tbl[iscsi_cid] = NULL;
+	ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
+	if (ret)
+		QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
+			  ret);
+ep_free_sq:
+	qedi_free_sq(qedi, qedi_ep);
+ep_conn_exit:
+	iscsi_destroy_endpoint(ep);
+	return ERR_PTR(ret);
+}
+
+static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
+{
+	struct qedi_endpoint *qedi_ep;
+	int ret = 0;
+
+	if (do_not_recover)
+		return 1;
+
+	qedi_ep = ep->dd_data;
+	if (qedi_ep->state == EP_STATE_IDLE ||
+	    qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
+		return -1;
+
+	if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
+		ret = 1;
+
+	ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
+					       QEDI_OFLD_WAIT_STATE(qedi_ep),
+					       msecs_to_jiffies(timeout_ms));
+
+	if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
+		ret = -1;
+
+	if (ret > 0)
+		return 1;
+	else if (!ret)
+		return 0;
+	else
+		return ret;
+}
+
+static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
+{
+	struct qedi_cmd *cmd, *cmd_tmp;
+
+	list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
+				 io_cmd) {
+		list_del_init(&cmd->io_cmd);
+		qedi_conn->active_cmd_count--;
+	}
+}
+
+static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
+{
+	struct qedi_endpoint *qedi_ep;
+	struct qedi_conn *qedi_conn = NULL;
+	struct iscsi_conn *conn = NULL;
+	struct qedi_ctx *qedi;
+	int ret = 0;
+	int wait_delay = 20 * HZ;
+	int abrt_conn = 0;
+	int count = 10;
+
+	qedi_ep = ep->dd_data;
+	qedi = qedi_ep->qedi;
+
+	flush_work(&qedi_ep->offload_work);
+
+	if (qedi_ep->conn) {
+		qedi_conn = qedi_ep->conn;
+		conn = qedi_conn->cls_conn->dd_data;
+		iscsi_suspend_queue(conn);
+		abrt_conn = qedi_conn->abrt_conn;
+
+		while (count--)	{
+			if (!test_bit(QEDI_CONN_FW_CLEANUP,
+				      &qedi_conn->flags)) {
+				break;
+			}
+			msleep(1000);
+		}
+
+		if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
+			if (do_not_recover) {
+				QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+					  "Do not recover cid=0x%x\n",
+					  qedi_ep->iscsi_cid);
+				goto ep_exit_recover;
+			}
+			QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+				  "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
+				  qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
+			qedi_cleanup_active_cmd_list(qedi_conn);
+			goto ep_release_conn;
+		}
+	}
+
+	if (do_not_recover)
+		goto ep_exit_recover;
+
+	switch (qedi_ep->state) {
+	case EP_STATE_OFLDCONN_START:
+		goto ep_release_conn;
+	case EP_STATE_OFLDCONN_FAILED:
+			break;
+	case EP_STATE_OFLDCONN_COMPL:
+		if (unlikely(!qedi_conn))
+			break;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
+			  qedi_conn->active_cmd_count, abrt_conn,
+			  qedi_ep->state,
+			  qedi_ep->iscsi_cid,
+			  qedi_ep->conn
+			  );
+
+		if (!qedi_conn->active_cmd_count)
+			abrt_conn = 0;
+		else
+			abrt_conn = 1;
+
+		if (abrt_conn)
+			qedi_clearsq(qedi, qedi_conn, NULL);
+		break;
+	default:
+		break;
+	}
+
+	qedi_ep->state = EP_STATE_DISCONN_START;
+	ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
+	if (ret) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "destroy_conn failed returned %d\n", ret);
+	} else {
+		ret = wait_event_interruptible_timeout(
+					qedi_ep->tcp_ofld_wait,
+					(qedi_ep->state !=
+					 EP_STATE_DISCONN_START),
+					wait_delay);
+		if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
+			QEDI_WARN(&qedi->dbg_ctx,
+				  "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
+				  ret, wait_delay, qedi_ep->iscsi_cid);
+		}
+	}
+
+ep_release_conn:
+	ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
+	if (ret)
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "release_conn returned %d, cid=0x%x\n",
+			  ret, qedi_ep->iscsi_cid);
+ep_exit_recover:
+	qedi_ep->state = EP_STATE_IDLE;
+	qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
+	qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
+	qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
+	qedi_free_sq(qedi, qedi_ep);
+
+	if (qedi_conn)
+		qedi_conn->ep = NULL;
+
+	qedi_ep->conn = NULL;
+	qedi_ep->qedi = NULL;
+	atomic_dec(&qedi->num_offloads);
+
+	iscsi_destroy_endpoint(ep);
+}
+
+static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
+{
+	struct qed_dev *cdev = qedi->cdev;
+	struct qedi_uio_dev *udev;
+	struct qedi_uio_ctrl *uctrl;
+	struct sk_buff *skb;
+	u32 len;
+	int rc = 0;
+
+	udev = qedi->udev;
+	if (!udev) {
+		QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
+		return -EINVAL;
+	}
+
+	uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
+	if (!uctrl) {
+		QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
+		return -EINVAL;
+	}
+
+	len = uctrl->host_tx_pkt_len;
+	if (!len) {
+		QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
+		return -EINVAL;
+	}
+
+	skb = alloc_skb(len, GFP_ATOMIC);
+	if (!skb) {
+		QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
+		return -EINVAL;
+	}
+
+	skb_put(skb, len);
+	memcpy(skb->data, udev->tx_pkt, len);
+	skb->ip_summed = CHECKSUM_NONE;
+
+	if (vlanid)
+		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
+
+	rc = qedi_ops->ll2->start_xmit(cdev, skb);
+	if (rc) {
+		QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
+			 rc);
+		kfree_skb(skb);
+	}
+
+	uctrl->host_tx_pkt_len = 0;
+	uctrl->hw_tx_cons++;
+
+	return rc;
+}
+
+static void qedi_offload_work(struct work_struct *work)
+{
+	struct qedi_endpoint *qedi_ep =
+		container_of(work, struct qedi_endpoint, offload_work);
+	struct qedi_ctx *qedi;
+	int wait_delay = 20 * HZ;
+	int ret;
+
+	qedi = qedi_ep->qedi;
+
+	ret = qedi_iscsi_offload_conn(qedi_ep);
+	if (ret) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
+			 qedi_ep->iscsi_cid, qedi_ep, ret);
+		qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
+		return;
+	}
+
+	ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
+					       (qedi_ep->state ==
+					       EP_STATE_OFLDCONN_COMPL),
+					       wait_delay);
+	if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
+		qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
+			 qedi_ep->iscsi_cid, qedi_ep);
+	}
+}
+
+static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
+{
+	struct qedi_ctx *qedi;
+	struct qedi_endpoint *qedi_ep;
+	int ret = 0;
+	u32 iscsi_cid;
+	u16 port_id = 0;
+
+	if (!shost) {
+		ret = -ENXIO;
+		QEDI_ERR(NULL, "shost is NULL\n");
+		return ret;
+	}
+
+	if (strcmp(shost->hostt->proc_name, "qedi")) {
+		ret = -ENXIO;
+		QEDI_ERR(NULL, "shost %s is invalid\n",
+			 shost->hostt->proc_name);
+		return ret;
+	}
+
+	qedi = iscsi_host_priv(shost);
+	if (path_data->handle == QEDI_PATH_HANDLE) {
+		ret = qedi_data_avail(qedi, path_data->vlan_id);
+		goto set_path_exit;
+	}
+
+	iscsi_cid = (u32)path_data->handle;
+	qedi_ep = qedi->ep_tbl[iscsi_cid];
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
+
+	if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
+		QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
+		ret = -EIO;
+		goto set_path_exit;
+	}
+
+	ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
+	ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
+
+	qedi_ep->vlan_id = path_data->vlan_id;
+	if (path_data->pmtu < DEF_PATH_MTU) {
+		qedi_ep->pmtu = qedi->ll2_mtu;
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "MTU cannot be %u, using default MTU %u\n",
+			   path_data->pmtu, qedi_ep->pmtu);
+	}
+
+	if (path_data->pmtu != qedi->ll2_mtu) {
+		if (path_data->pmtu > JUMBO_MTU) {
+			ret = -EINVAL;
+			QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
+			goto set_path_exit;
+		}
+
+		qedi_reset_host_mtu(qedi, path_data->pmtu);
+		qedi_ep->pmtu = qedi->ll2_mtu;
+	}
+
+	port_id = qedi_ep->src_port;
+	if (port_id >= QEDI_LOCAL_PORT_MIN &&
+	    port_id < QEDI_LOCAL_PORT_MAX) {
+		if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
+			port_id = 0;
+	} else {
+		port_id = 0;
+	}
+
+	if (!port_id) {
+		port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
+		if (port_id == QEDI_LOCAL_PORT_INVALID) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Failed to allocate port id for iscsi_cid=0x%x\n",
+				 iscsi_cid);
+			ret = -ENOMEM;
+			goto set_path_exit;
+		}
+	}
+
+	qedi_ep->src_port = port_id;
+
+	if (qedi_ep->ip_type == TCP_IPV4) {
+		memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
+		       sizeof(struct in_addr));
+		memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
+		       sizeof(struct in_addr));
+		qedi->ip_type = TCP_IPV4;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
+			  qedi_ep->src_addr, qedi_ep->src_port,
+			  qedi_ep->dst_addr, qedi_ep->dst_port);
+	} else {
+		memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
+		       sizeof(struct in6_addr));
+		memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
+		       sizeof(struct in6_addr));
+		qedi->ip_type = TCP_IPV6;
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
+			  qedi_ep->src_addr, qedi_ep->src_port,
+			  qedi_ep->dst_addr, qedi_ep->dst_port);
+	}
+
+	INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
+	queue_work(qedi->offload_thread, &qedi_ep->offload_work);
+
+	ret = 0;
+
+set_path_exit:
+	return ret;
+}
+
+static umode_t qedi_attr_is_visible(int param_type, int param)
+{
+	switch (param_type) {
+	case ISCSI_HOST_PARAM:
+		switch (param) {
+		case ISCSI_HOST_PARAM_NETDEV_NAME:
+		case ISCSI_HOST_PARAM_HWADDRESS:
+		case ISCSI_HOST_PARAM_IPADDRESS:
+			return 0444;
+		default:
+			return 0;
+		}
+	case ISCSI_PARAM:
+		switch (param) {
+		case ISCSI_PARAM_MAX_RECV_DLENGTH:
+		case ISCSI_PARAM_MAX_XMIT_DLENGTH:
+		case ISCSI_PARAM_HDRDGST_EN:
+		case ISCSI_PARAM_DATADGST_EN:
+		case ISCSI_PARAM_CONN_ADDRESS:
+		case ISCSI_PARAM_CONN_PORT:
+		case ISCSI_PARAM_EXP_STATSN:
+		case ISCSI_PARAM_PERSISTENT_ADDRESS:
+		case ISCSI_PARAM_PERSISTENT_PORT:
+		case ISCSI_PARAM_PING_TMO:
+		case ISCSI_PARAM_RECV_TMO:
+		case ISCSI_PARAM_INITIAL_R2T_EN:
+		case ISCSI_PARAM_MAX_R2T:
+		case ISCSI_PARAM_IMM_DATA_EN:
+		case ISCSI_PARAM_FIRST_BURST:
+		case ISCSI_PARAM_MAX_BURST:
+		case ISCSI_PARAM_PDU_INORDER_EN:
+		case ISCSI_PARAM_DATASEQ_INORDER_EN:
+		case ISCSI_PARAM_ERL:
+		case ISCSI_PARAM_TARGET_NAME:
+		case ISCSI_PARAM_TPGT:
+		case ISCSI_PARAM_USERNAME:
+		case ISCSI_PARAM_PASSWORD:
+		case ISCSI_PARAM_USERNAME_IN:
+		case ISCSI_PARAM_PASSWORD_IN:
+		case ISCSI_PARAM_FAST_ABORT:
+		case ISCSI_PARAM_ABORT_TMO:
+		case ISCSI_PARAM_LU_RESET_TMO:
+		case ISCSI_PARAM_TGT_RESET_TMO:
+		case ISCSI_PARAM_IFACE_NAME:
+		case ISCSI_PARAM_INITIATOR_NAME:
+		case ISCSI_PARAM_BOOT_ROOT:
+		case ISCSI_PARAM_BOOT_NIC:
+		case ISCSI_PARAM_BOOT_TARGET:
+			return 0444;
+		default:
+			return 0;
+		}
+	}
+
+	return 0;
+}
+
+static void qedi_cleanup_task(struct iscsi_task *task)
+{
+	if (!task->sc || task->state == ISCSI_TASK_PENDING) {
+		QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
+			  atomic_read(&task->refcount));
+		return;
+	}
+
+	qedi_iscsi_unmap_sg_list(task->dd_data);
+}
+
+struct iscsi_transport qedi_iscsi_transport = {
+	.owner = THIS_MODULE,
+	.name = QEDI_MODULE_NAME,
+	.caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
+		CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
+	.create_session = qedi_session_create,
+	.destroy_session = qedi_session_destroy,
+	.create_conn = qedi_conn_create,
+	.bind_conn = qedi_conn_bind,
+	.start_conn = qedi_conn_start,
+	.stop_conn = iscsi_conn_stop,
+	.destroy_conn = qedi_conn_destroy,
+	.set_param = iscsi_set_param,
+	.get_ep_param = qedi_ep_get_param,
+	.get_conn_param = iscsi_conn_get_param,
+	.get_session_param = iscsi_session_get_param,
+	.get_host_param = qedi_host_get_param,
+	.send_pdu = iscsi_conn_send_pdu,
+	.get_stats = qedi_conn_get_stats,
+	.xmit_task = qedi_task_xmit,
+	.cleanup_task = qedi_cleanup_task,
+	.session_recovery_timedout = iscsi_session_recovery_timedout,
+	.ep_connect = qedi_ep_connect,
+	.ep_poll = qedi_ep_poll,
+	.ep_disconnect = qedi_ep_disconnect,
+	.set_path = qedi_set_path,
+	.attr_is_visible = qedi_attr_is_visible,
+};
+
+void qedi_start_conn_recovery(struct qedi_ctx *qedi,
+			      struct qedi_conn *qedi_conn)
+{
+	struct iscsi_cls_session *cls_sess;
+	struct iscsi_cls_conn *cls_conn;
+	struct iscsi_conn *conn;
+
+	cls_conn = qedi_conn->cls_conn;
+	conn = cls_conn->dd_data;
+	cls_sess = iscsi_conn_to_session(cls_conn);
+
+	if (iscsi_is_session_online(cls_sess)) {
+		qedi_conn->abrt_conn = 1;
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Failing connection, state=0x%x, cid=0x%x\n",
+			 conn->session->state, qedi_conn->iscsi_conn_id);
+		iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
+				   ISCSI_ERR_CONN_FAILED);
+	}
+}
+
+static const struct {
+	enum iscsi_error_types error_code;
+	char *err_string;
+} qedi_iscsi_error[] = {
+	{ ISCSI_STATUS_NONE,
+	  "tcp_error none"
+	},
+	{ ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
+	  "task cid mismatch"
+	},
+	{ ISCSI_CONN_ERROR_TASK_NOT_VALID,
+	  "invalid task"
+	},
+	{ ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
+	  "rq ring full"
+	},
+	{ ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
+	  "cmdq ring full"
+	},
+	{ ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
+	  "sge caching failed"
+	},
+	{ ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
+	  "hdr digest error"
+	},
+	{ ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
+	  "local cmpl error"
+	},
+	{ ISCSI_CONN_ERROR_DATA_OVERRUN,
+	  "invalid task"
+	},
+	{ ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
+	  "out of sge error"
+	},
+	{ ISCSI_CONN_ERROR_TCP_SEG_PROC_IP_OPTIONS_ERROR,
+	  "tcp seg ip options error"
+	},
+	{ ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
+	  "tcp ip fragment error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
+	  "AHS len protocol error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
+	  "itt out of range error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
+	  "data seg more than pdu size"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
+	  "invalid opcode"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
+	  "invalid opcode before update"
+	},
+	{ ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
+	  "unexpected opcode"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
+	  "r2t carries no data"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
+	  "data sn error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
+	  "data TTT error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
+	  "r2t TTT error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
+	  "buffer offset error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
+	  "buffer offset ooo"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
+	  "data seg len 0"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
+	  "data xer len error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
+	  "data xer len1 error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
+	  "data xer len2 error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
+	  "protocol lun error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
+	  "f bit zero error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
+	  "exp stat sn error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
+	  "dsl not zero error"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
+	  "invalid dsl"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
+	  "data seg len too big"
+	},
+	{ ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
+	  "outstanding r2t count error"
+	},
+	{ ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
+	  "sense datalen error"
+	},
+};
+
+char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
+{
+	int i;
+	char *msg = NULL;
+
+	for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
+		if (qedi_iscsi_error[i].error_code == err_code) {
+			msg = qedi_iscsi_error[i].err_string;
+			break;
+		}
+	}
+	return msg;
+}
+
+void qedi_process_iscsi_error(struct qedi_endpoint *ep, struct async_data *data)
+{
+	struct qedi_conn *qedi_conn;
+	struct qedi_ctx *qedi;
+	char warn_notice[] = "iscsi_warning";
+	char error_notice[] = "iscsi_error";
+	char unknown_msg[] = "Unknown error";
+	char *message;
+	int need_recovery = 0;
+	u32 err_mask = 0;
+	char *msg;
+
+	if (!ep)
+		return;
+
+	qedi_conn = ep->conn;
+	if (!qedi_conn)
+		return;
+
+	qedi = ep->qedi;
+
+	QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
+		 data->error_code);
+
+	if (err_mask) {
+		need_recovery = 0;
+		message = warn_notice;
+	} else {
+		need_recovery = 1;
+		message = error_notice;
+	}
+
+	msg = qedi_get_iscsi_error(data->error_code);
+	if (!msg) {
+		need_recovery = 0;
+		msg = unknown_msg;
+	}
+
+	iscsi_conn_printk(KERN_ALERT,
+			  qedi_conn->cls_conn->dd_data,
+			  "qedi: %s - %s\n", message, msg);
+
+	if (need_recovery)
+		qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
+}
+
+void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data)
+{
+	struct qedi_conn *qedi_conn;
+
+	if (!ep)
+		return;
+
+	qedi_conn = ep->conn;
+	if (!qedi_conn)
+		return;
+
+	QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
+		 data->error_code);
+
+	qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
+}

drivers/scsi/qedi/qedi_iscsi.h

@@ -0,0 +1,232 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#ifndef _QEDI_ISCSI_H_
+#define _QEDI_ISCSI_H_
+
+#include <linux/socket.h>
+#include <linux/completion.h>
+#include "qedi.h"
+
+#define ISCSI_MAX_SESS_PER_HBA	4096
+
+#define DEF_KA_TIMEOUT		7200000
+#define DEF_KA_INTERVAL		10000
+#define DEF_KA_MAX_PROBE_COUNT	10
+#define DEF_TOS			0
+#define DEF_TTL			0xfe
+#define DEF_SND_SEQ_SCALE	0
+#define DEF_RCV_BUF		0xffff
+#define DEF_SND_BUF		0xffff
+#define DEF_SEED		0
+#define DEF_MAX_RT_TIME		8000
+#define DEF_MAX_DA_COUNT        2
+#define DEF_SWS_TIMER		1000
+#define DEF_MAX_CWND		2
+#define DEF_PATH_MTU		1500
+#define DEF_MSS			1460
+#define DEF_LL2_MTU		1560
+#define JUMBO_MTU		9000
+
+#define MIN_MTU         576 /* rfc 793 */
+#define IPV4_HDR_LEN    20
+#define IPV6_HDR_LEN    40
+#define TCP_HDR_LEN     20
+#define TCP_OPTION_LEN  12
+#define VLAN_LEN         4
+
+enum {
+	EP_STATE_IDLE                   = 0x0,
+	EP_STATE_ACQRCONN_START         = 0x1,
+	EP_STATE_ACQRCONN_COMPL         = 0x2,
+	EP_STATE_OFLDCONN_START         = 0x4,
+	EP_STATE_OFLDCONN_COMPL         = 0x8,
+	EP_STATE_DISCONN_START          = 0x10,
+	EP_STATE_DISCONN_COMPL          = 0x20,
+	EP_STATE_CLEANUP_START          = 0x40,
+	EP_STATE_CLEANUP_CMPL           = 0x80,
+	EP_STATE_TCP_FIN_RCVD           = 0x100,
+	EP_STATE_TCP_RST_RCVD           = 0x200,
+	EP_STATE_LOGOUT_SENT            = 0x400,
+	EP_STATE_LOGOUT_RESP_RCVD       = 0x800,
+	EP_STATE_CLEANUP_FAILED         = 0x1000,
+	EP_STATE_OFLDCONN_FAILED        = 0x2000,
+	EP_STATE_CONNECT_FAILED         = 0x4000,
+	EP_STATE_DISCONN_TIMEDOUT       = 0x8000,
+};
+
+struct qedi_conn;
+
+struct qedi_endpoint {
+	struct qedi_ctx *qedi;
+	u32 dst_addr[4];
+	u32 src_addr[4];
+	u16 src_port;
+	u16 dst_port;
+	u16 vlan_id;
+	u16 pmtu;
+	u8 src_mac[ETH_ALEN];
+	u8 dst_mac[ETH_ALEN];
+	u8 ip_type;
+	int state;
+	wait_queue_head_t ofld_wait;
+	wait_queue_head_t tcp_ofld_wait;
+	u32 iscsi_cid;
+	/* identifier of the connection from qed */
+	u32 handle;
+	u32 fw_cid;
+	void __iomem *p_doorbell;
+
+	/* Send queue management */
+	struct iscsi_wqe *sq;
+	dma_addr_t sq_dma;
+
+	u16 sq_prod_idx;
+	u16 fw_sq_prod_idx;
+	u16 sq_con_idx;
+	u32 sq_mem_size;
+
+	void *sq_pbl;
+	dma_addr_t sq_pbl_dma;
+	u32 sq_pbl_size;
+	struct qedi_conn *conn;
+	struct work_struct offload_work;
+};
+
+#define QEDI_SQ_WQES_MIN	16
+
+struct qedi_io_bdt {
+	struct iscsi_sge *sge_tbl;
+	dma_addr_t sge_tbl_dma;
+	u16 sge_valid;
+};
+
+/**
+ * struct generic_pdu_resc - login pdu resource structure
+ *
+ * @req_buf:            driver buffer used to stage payload associated with
+ *                      the login request
+ * @req_dma_addr:       dma address for iscsi login request payload buffer
+ * @req_buf_size:       actual login request payload length
+ * @req_wr_ptr:         pointer into login request buffer when next data is
+ *                      to be written
+ * @resp_hdr:           iscsi header where iscsi login response header is to
+ *                      be recreated
+ * @resp_buf:           buffer to stage login response payload
+ * @resp_dma_addr:      login response payload buffer dma address
+ * @resp_buf_size:      login response paylod length
+ * @resp_wr_ptr:        pointer into login response buffer when next data is
+ *                      to be written
+ * @req_bd_tbl:         iscsi login request payload BD table
+ * @req_bd_dma:         login request BD table dma address
+ * @resp_bd_tbl:        iscsi login response payload BD table
+ * @resp_bd_dma:        login request BD table dma address
+ *
+ * following structure defines buffer info for generic pdus such as iSCSI Login,
+ *      Logout and NOP
+ */
+struct generic_pdu_resc {
+	char *req_buf;
+	dma_addr_t req_dma_addr;
+	u32 req_buf_size;
+	char *req_wr_ptr;
+	struct iscsi_hdr resp_hdr;
+	char *resp_buf;
+	dma_addr_t resp_dma_addr;
+	u32 resp_buf_size;
+	char *resp_wr_ptr;
+	char *req_bd_tbl;
+	dma_addr_t req_bd_dma;
+	char *resp_bd_tbl;
+	dma_addr_t resp_bd_dma;
+};
+
+struct qedi_conn {
+	struct iscsi_cls_conn *cls_conn;
+	struct qedi_ctx *qedi;
+	struct qedi_endpoint *ep;
+	struct list_head active_cmd_list;
+	spinlock_t list_lock;		/* internal conn lock */
+	u32 active_cmd_count;
+	u32 cmd_cleanup_req;
+	u32 cmd_cleanup_cmpl;
+
+	u32 iscsi_conn_id;
+	int itt;
+	int abrt_conn;
+#define QEDI_CID_RESERVED	0x5AFF
+	u32 fw_cid;
+	/*
+	 * Buffer for login negotiation process
+	 */
+	struct generic_pdu_resc gen_pdu;
+
+	struct list_head tmf_work_list;
+	wait_queue_head_t wait_queue;
+	spinlock_t tmf_work_lock;	/* tmf work lock */
+	unsigned long flags;
+#define QEDI_CONN_FW_CLEANUP	1
+};
+
+struct qedi_cmd {
+	struct list_head io_cmd;
+	bool io_cmd_in_list;
+	struct iscsi_hdr hdr;
+	struct qedi_conn *conn;
+	struct scsi_cmnd *scsi_cmd;
+	struct scatterlist *sg;
+	struct qedi_io_bdt io_tbl;
+	struct iscsi_task_context request;
+	unsigned char *sense_buffer;
+	dma_addr_t sense_buffer_dma;
+	u16 task_id;
+
+	/* field populated for tmf work queue */
+	struct iscsi_task *task;
+	struct work_struct tmf_work;
+	int state;
+#define CLEANUP_WAIT	1
+#define CLEANUP_RECV	2
+#define CLEANUP_WAIT_FAILED	3
+#define CLEANUP_NOT_REQUIRED	4
+#define LUN_RESET_RESPONSE_RECEIVED	5
+#define RESPONSE_RECEIVED	6
+
+	int type;
+#define TYPEIO		1
+#define TYPERESET	2
+
+	struct qedi_work_map *list_tmf_work;
+	/* slowpath management */
+	bool use_slowpath;
+
+	struct iscsi_tm_rsp *tmf_resp_buf;
+	struct qedi_work cqe_work;
+};
+
+struct qedi_work_map {
+	struct list_head list;
+	struct qedi_cmd *qedi_cmd;
+	int rtid;
+
+	int state;
+#define QEDI_WORK_QUEUED	1
+#define QEDI_WORK_SCHEDULED	2
+#define QEDI_WORK_EXIT		3
+
+	struct work_struct *ptr_tmf_work;
+};
+
+#define qedi_set_itt(task_id, itt) ((u32)(((task_id) & 0xffff) | ((itt) << 16)))
+#define qedi_get_itt(cqe) (cqe.iscsi_hdr.cmd.itt >> 16)
+
+#define QEDI_OFLD_WAIT_STATE(q) ((q)->state == EP_STATE_OFLDCONN_FAILED || \
+				(q)->state == EP_STATE_OFLDCONN_COMPL)
+
+#endif /* _QEDI_ISCSI_H_ */

drivers/scsi/qedi/qedi_main.c

@@ -0,0 +1,2127 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/if_arp.h>
+#include <scsi/iscsi_if.h>
+#include <linux/inet.h>
+#include <net/arp.h>
+#include <linux/list.h>
+#include <linux/kthread.h>
+#include <linux/mm.h>
+#include <linux/if_vlan.h>
+#include <linux/cpu.h>
+
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi.h>
+
+#include "qedi.h"
+#include "qedi_gbl.h"
+#include "qedi_iscsi.h"
+
+static uint qedi_fw_debug;
+module_param(qedi_fw_debug, uint, 0644);
+MODULE_PARM_DESC(qedi_fw_debug, " Firmware debug level 0(default) to 3");
+
+uint qedi_dbg_log = QEDI_LOG_WARN | QEDI_LOG_SCSI_TM;
+module_param(qedi_dbg_log, uint, 0644);
+MODULE_PARM_DESC(qedi_dbg_log, " Default debug level");
+
+uint qedi_io_tracing;
+module_param(qedi_io_tracing, uint, 0644);
+MODULE_PARM_DESC(qedi_io_tracing,
+		 " Enable logging of SCSI requests/completions into trace buffer. (default off).");
+
+const struct qed_iscsi_ops *qedi_ops;
+static struct scsi_transport_template *qedi_scsi_transport;
+static struct pci_driver qedi_pci_driver;
+static DEFINE_PER_CPU(struct qedi_percpu_s, qedi_percpu);
+static LIST_HEAD(qedi_udev_list);
+/* Static function declaration */
+static int qedi_alloc_global_queues(struct qedi_ctx *qedi);
+static void qedi_free_global_queues(struct qedi_ctx *qedi);
+static struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid);
+static void qedi_reset_uio_rings(struct qedi_uio_dev *udev);
+static void qedi_ll2_free_skbs(struct qedi_ctx *qedi);
+
+static int qedi_iscsi_event_cb(void *context, u8 fw_event_code, void *fw_handle)
+{
+	struct qedi_ctx *qedi;
+	struct qedi_endpoint *qedi_ep;
+	struct async_data *data;
+	int rval = 0;
+
+	if (!context || !fw_handle) {
+		QEDI_ERR(NULL, "Recv event with ctx NULL\n");
+		return -EINVAL;
+	}
+
+	qedi = (struct qedi_ctx *)context;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "Recv Event %d fw_handle %p\n", fw_event_code, fw_handle);
+
+	data = (struct async_data *)fw_handle;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "cid=0x%x tid=0x%x err-code=0x%x fw-dbg-param=0x%x\n",
+		   data->cid, data->itid, data->error_code,
+		   data->fw_debug_param);
+
+	qedi_ep = qedi->ep_tbl[data->cid];
+
+	if (!qedi_ep) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Cannot process event, ep already disconnected, cid=0x%x\n",
+			   data->cid);
+		WARN_ON(1);
+		return -ENODEV;
+	}
+
+	switch (fw_event_code) {
+	case ISCSI_EVENT_TYPE_ASYN_CONNECT_COMPLETE:
+		if (qedi_ep->state == EP_STATE_OFLDCONN_START)
+			qedi_ep->state = EP_STATE_OFLDCONN_COMPL;
+
+		wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
+		break;
+	case ISCSI_EVENT_TYPE_ASYN_TERMINATE_DONE:
+		qedi_ep->state = EP_STATE_DISCONN_COMPL;
+		wake_up_interruptible(&qedi_ep->tcp_ofld_wait);
+		break;
+	case ISCSI_EVENT_TYPE_ISCSI_CONN_ERROR:
+		qedi_process_iscsi_error(qedi_ep, data);
+		break;
+	case ISCSI_EVENT_TYPE_ASYN_ABORT_RCVD:
+	case ISCSI_EVENT_TYPE_ASYN_SYN_RCVD:
+	case ISCSI_EVENT_TYPE_ASYN_MAX_RT_TIME:
+	case ISCSI_EVENT_TYPE_ASYN_MAX_RT_CNT:
+	case ISCSI_EVENT_TYPE_ASYN_MAX_KA_PROBES_CNT:
+	case ISCSI_EVENT_TYPE_ASYN_FIN_WAIT2:
+	case ISCSI_EVENT_TYPE_TCP_CONN_ERROR:
+		qedi_process_tcp_error(qedi_ep, data);
+		break;
+	default:
+		QEDI_ERR(&qedi->dbg_ctx, "Recv Unknown Event %u\n",
+			 fw_event_code);
+	}
+
+	return rval;
+}
+
+static int qedi_uio_open(struct uio_info *uinfo, struct inode *inode)
+{
+	struct qedi_uio_dev *udev = uinfo->priv;
+	struct qedi_ctx *qedi = udev->qedi;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (udev->uio_dev != -1)
+		return -EBUSY;
+
+	rtnl_lock();
+	udev->uio_dev = iminor(inode);
+	qedi_reset_uio_rings(udev);
+	set_bit(UIO_DEV_OPENED, &qedi->flags);
+	rtnl_unlock();
+
+	return 0;
+}
+
+static int qedi_uio_close(struct uio_info *uinfo, struct inode *inode)
+{
+	struct qedi_uio_dev *udev = uinfo->priv;
+	struct qedi_ctx *qedi = udev->qedi;
+
+	udev->uio_dev = -1;
+	clear_bit(UIO_DEV_OPENED, &qedi->flags);
+	qedi_ll2_free_skbs(qedi);
+	return 0;
+}
+
+static void __qedi_free_uio_rings(struct qedi_uio_dev *udev)
+{
+	if (udev->ll2_ring) {
+		free_page((unsigned long)udev->ll2_ring);
+		udev->ll2_ring = NULL;
+	}
+
+	if (udev->ll2_buf) {
+		free_pages((unsigned long)udev->ll2_buf, 2);
+		udev->ll2_buf = NULL;
+	}
+}
+
+static void __qedi_free_uio(struct qedi_uio_dev *udev)
+{
+	uio_unregister_device(&udev->qedi_uinfo);
+
+	__qedi_free_uio_rings(udev);
+
+	pci_dev_put(udev->pdev);
+	kfree(udev->uctrl);
+	kfree(udev);
+}
+
+static void qedi_free_uio(struct qedi_uio_dev *udev)
+{
+	if (!udev)
+		return;
+
+	list_del_init(&udev->list);
+	__qedi_free_uio(udev);
+}
+
+static void qedi_reset_uio_rings(struct qedi_uio_dev *udev)
+{
+	struct qedi_ctx *qedi = NULL;
+	struct qedi_uio_ctrl *uctrl = NULL;
+
+	qedi = udev->qedi;
+	uctrl = udev->uctrl;
+
+	spin_lock_bh(&qedi->ll2_lock);
+	uctrl->host_rx_cons = 0;
+	uctrl->hw_rx_prod = 0;
+	uctrl->hw_rx_bd_prod = 0;
+	uctrl->host_rx_bd_cons = 0;
+
+	memset(udev->ll2_ring, 0, udev->ll2_ring_size);
+	memset(udev->ll2_buf, 0, udev->ll2_buf_size);
+	spin_unlock_bh(&qedi->ll2_lock);
+}
+
+static int __qedi_alloc_uio_rings(struct qedi_uio_dev *udev)
+{
+	int rc = 0;
+
+	if (udev->ll2_ring || udev->ll2_buf)
+		return rc;
+
+	/* Allocating memory for LL2 ring  */
+	udev->ll2_ring_size = QEDI_PAGE_SIZE;
+	udev->ll2_ring = (void *)get_zeroed_page(GFP_KERNEL | __GFP_COMP);
+	if (!udev->ll2_ring) {
+		rc = -ENOMEM;
+		goto exit_alloc_ring;
+	}
+
+	/* Allocating memory for Tx/Rx pkt buffer */
+	udev->ll2_buf_size = TX_RX_RING * LL2_SINGLE_BUF_SIZE;
+	udev->ll2_buf_size = QEDI_PAGE_ALIGN(udev->ll2_buf_size);
+	udev->ll2_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_COMP |
+						 __GFP_ZERO, 2);
+	if (!udev->ll2_buf) {
+		rc = -ENOMEM;
+		goto exit_alloc_buf;
+	}
+	return rc;
+
+exit_alloc_buf:
+	free_page((unsigned long)udev->ll2_ring);
+	udev->ll2_ring = NULL;
+exit_alloc_ring:
+	return rc;
+}
+
+static int qedi_alloc_uio_rings(struct qedi_ctx *qedi)
+{
+	struct qedi_uio_dev *udev = NULL;
+	struct qedi_uio_ctrl *uctrl = NULL;
+	int rc = 0;
+
+	list_for_each_entry(udev, &qedi_udev_list, list) {
+		if (udev->pdev == qedi->pdev) {
+			udev->qedi = qedi;
+			if (__qedi_alloc_uio_rings(udev)) {
+				udev->qedi = NULL;
+				return -ENOMEM;
+			}
+			qedi->udev = udev;
+			return 0;
+		}
+	}
+
+	udev = kzalloc(sizeof(*udev), GFP_KERNEL);
+	if (!udev) {
+		rc = -ENOMEM;
+		goto err_udev;
+	}
+
+	uctrl = kzalloc(sizeof(*uctrl), GFP_KERNEL);
+	if (!uctrl) {
+		rc = -ENOMEM;
+		goto err_uctrl;
+	}
+
+	udev->uio_dev = -1;
+
+	udev->qedi = qedi;
+	udev->pdev = qedi->pdev;
+	udev->uctrl = uctrl;
+
+	rc = __qedi_alloc_uio_rings(udev);
+	if (rc)
+		goto err_uio_rings;
+
+	list_add(&udev->list, &qedi_udev_list);
+
+	pci_dev_get(udev->pdev);
+	qedi->udev = udev;
+
+	udev->tx_pkt = udev->ll2_buf;
+	udev->rx_pkt = udev->ll2_buf + LL2_SINGLE_BUF_SIZE;
+	return 0;
+
+ err_uio_rings:
+	kfree(uctrl);
+ err_uctrl:
+	kfree(udev);
+ err_udev:
+	return -ENOMEM;
+}
+
+static int qedi_init_uio(struct qedi_ctx *qedi)
+{
+	struct qedi_uio_dev *udev = qedi->udev;
+	struct uio_info *uinfo;
+	int ret = 0;
+
+	if (!udev)
+		return -ENOMEM;
+
+	uinfo = &udev->qedi_uinfo;
+
+	uinfo->mem[0].addr = (unsigned long)udev->uctrl;
+	uinfo->mem[0].size = sizeof(struct qedi_uio_ctrl);
+	uinfo->mem[0].memtype = UIO_MEM_LOGICAL;
+
+	uinfo->mem[1].addr = (unsigned long)udev->ll2_ring;
+	uinfo->mem[1].size = udev->ll2_ring_size;
+	uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
+
+	uinfo->mem[2].addr = (unsigned long)udev->ll2_buf;
+	uinfo->mem[2].size = udev->ll2_buf_size;
+	uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
+
+	uinfo->name = "qedi_uio";
+	uinfo->version = QEDI_MODULE_VERSION;
+	uinfo->irq = UIO_IRQ_CUSTOM;
+
+	uinfo->open = qedi_uio_open;
+	uinfo->release = qedi_uio_close;
+
+	if (udev->uio_dev == -1) {
+		if (!uinfo->priv) {
+			uinfo->priv = udev;
+
+			ret = uio_register_device(&udev->pdev->dev, uinfo);
+			if (ret) {
+				QEDI_ERR(&qedi->dbg_ctx,
+					 "UIO registration failed\n");
+			}
+		}
+	}
+
+	return ret;
+}
+
+static int qedi_alloc_and_init_sb(struct qedi_ctx *qedi,
+				  struct qed_sb_info *sb_info, u16 sb_id)
+{
+	struct status_block *sb_virt;
+	dma_addr_t sb_phys;
+	int ret;
+
+	sb_virt = dma_alloc_coherent(&qedi->pdev->dev,
+				     sizeof(struct status_block), &sb_phys,
+				     GFP_KERNEL);
+	if (!sb_virt) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Status block allocation failed for id = %d.\n",
+			  sb_id);
+		return -ENOMEM;
+	}
+
+	ret = qedi_ops->common->sb_init(qedi->cdev, sb_info, sb_virt, sb_phys,
+				       sb_id, QED_SB_TYPE_STORAGE);
+	if (ret) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Status block initialization failed for id = %d.\n",
+			  sb_id);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void qedi_free_sb(struct qedi_ctx *qedi)
+{
+	struct qed_sb_info *sb_info;
+	int id;
+
+	for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
+		sb_info = &qedi->sb_array[id];
+		if (sb_info->sb_virt)
+			dma_free_coherent(&qedi->pdev->dev,
+					  sizeof(*sb_info->sb_virt),
+					  (void *)sb_info->sb_virt,
+					  sb_info->sb_phys);
+	}
+}
+
+static void qedi_free_fp(struct qedi_ctx *qedi)
+{
+	kfree(qedi->fp_array);
+	kfree(qedi->sb_array);
+}
+
+static void qedi_destroy_fp(struct qedi_ctx *qedi)
+{
+	qedi_free_sb(qedi);
+	qedi_free_fp(qedi);
+}
+
+static int qedi_alloc_fp(struct qedi_ctx *qedi)
+{
+	int ret = 0;
+
+	qedi->fp_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
+				 sizeof(struct qedi_fastpath), GFP_KERNEL);
+	if (!qedi->fp_array) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "fastpath fp array allocation failed.\n");
+		return -ENOMEM;
+	}
+
+	qedi->sb_array = kcalloc(MIN_NUM_CPUS_MSIX(qedi),
+				 sizeof(struct qed_sb_info), GFP_KERNEL);
+	if (!qedi->sb_array) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "fastpath sb array allocation failed.\n");
+		ret = -ENOMEM;
+		goto free_fp;
+	}
+
+	return ret;
+
+free_fp:
+	qedi_free_fp(qedi);
+	return ret;
+}
+
+static void qedi_int_fp(struct qedi_ctx *qedi)
+{
+	struct qedi_fastpath *fp;
+	int id;
+
+	memset(qedi->fp_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
+	       sizeof(*qedi->fp_array));
+	memset(qedi->sb_array, 0, MIN_NUM_CPUS_MSIX(qedi) *
+	       sizeof(*qedi->sb_array));
+
+	for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
+		fp = &qedi->fp_array[id];
+		fp->sb_info = &qedi->sb_array[id];
+		fp->sb_id = id;
+		fp->qedi = qedi;
+		snprintf(fp->name, sizeof(fp->name), "%s-fp-%d",
+			 "qedi", id);
+
+		/* fp_array[i] ---- irq cookie
+		 * So init data which is needed in int ctx
+		 */
+	}
+}
+
+static int qedi_prepare_fp(struct qedi_ctx *qedi)
+{
+	struct qedi_fastpath *fp;
+	int id, ret = 0;
+
+	ret = qedi_alloc_fp(qedi);
+	if (ret)
+		goto err;
+
+	qedi_int_fp(qedi);
+
+	for (id = 0; id < MIN_NUM_CPUS_MSIX(qedi); id++) {
+		fp = &qedi->fp_array[id];
+		ret = qedi_alloc_and_init_sb(qedi, fp->sb_info, fp->sb_id);
+		if (ret) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "SB allocation and initialization failed.\n");
+			ret = -EIO;
+			goto err_init;
+		}
+	}
+
+	return 0;
+
+err_init:
+	qedi_free_sb(qedi);
+	qedi_free_fp(qedi);
+err:
+	return ret;
+}
+
+static int qedi_setup_cid_que(struct qedi_ctx *qedi)
+{
+	int i;
+
+	qedi->cid_que.cid_que_base = kmalloc_array(qedi->max_active_conns,
+						   sizeof(u32), GFP_KERNEL);
+	if (!qedi->cid_que.cid_que_base)
+		return -ENOMEM;
+
+	qedi->cid_que.conn_cid_tbl = kmalloc_array(qedi->max_active_conns,
+						   sizeof(struct qedi_conn *),
+						   GFP_KERNEL);
+	if (!qedi->cid_que.conn_cid_tbl) {
+		kfree(qedi->cid_que.cid_que_base);
+		qedi->cid_que.cid_que_base = NULL;
+		return -ENOMEM;
+	}
+
+	qedi->cid_que.cid_que = (u32 *)qedi->cid_que.cid_que_base;
+	qedi->cid_que.cid_q_prod_idx = 0;
+	qedi->cid_que.cid_q_cons_idx = 0;
+	qedi->cid_que.cid_q_max_idx = qedi->max_active_conns;
+	qedi->cid_que.cid_free_cnt = qedi->max_active_conns;
+
+	for (i = 0; i < qedi->max_active_conns; i++) {
+		qedi->cid_que.cid_que[i] = i;
+		qedi->cid_que.conn_cid_tbl[i] = NULL;
+	}
+
+	return 0;
+}
+
+static void qedi_release_cid_que(struct qedi_ctx *qedi)
+{
+	kfree(qedi->cid_que.cid_que_base);
+	qedi->cid_que.cid_que_base = NULL;
+
+	kfree(qedi->cid_que.conn_cid_tbl);
+	qedi->cid_que.conn_cid_tbl = NULL;
+}
+
+static int qedi_init_id_tbl(struct qedi_portid_tbl *id_tbl, u16 size,
+			    u16 start_id, u16 next)
+{
+	id_tbl->start = start_id;
+	id_tbl->max = size;
+	id_tbl->next = next;
+	spin_lock_init(&id_tbl->lock);
+	id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
+	if (!id_tbl->table)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void qedi_free_id_tbl(struct qedi_portid_tbl *id_tbl)
+{
+	kfree(id_tbl->table);
+	id_tbl->table = NULL;
+}
+
+int qedi_alloc_id(struct qedi_portid_tbl *id_tbl, u16 id)
+{
+	int ret = -1;
+
+	id -= id_tbl->start;
+	if (id >= id_tbl->max)
+		return ret;
+
+	spin_lock(&id_tbl->lock);
+	if (!test_bit(id, id_tbl->table)) {
+		set_bit(id, id_tbl->table);
+		ret = 0;
+	}
+	spin_unlock(&id_tbl->lock);
+	return ret;
+}
+
+u16 qedi_alloc_new_id(struct qedi_portid_tbl *id_tbl)
+{
+	u16 id;
+
+	spin_lock(&id_tbl->lock);
+	id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
+	if (id >= id_tbl->max) {
+		id = QEDI_LOCAL_PORT_INVALID;
+		if (id_tbl->next != 0) {
+			id = find_first_zero_bit(id_tbl->table, id_tbl->next);
+			if (id >= id_tbl->next)
+				id = QEDI_LOCAL_PORT_INVALID;
+		}
+	}
+
+	if (id < id_tbl->max) {
+		set_bit(id, id_tbl->table);
+		id_tbl->next = (id + 1) & (id_tbl->max - 1);
+		id += id_tbl->start;
+	}
+
+	spin_unlock(&id_tbl->lock);
+
+	return id;
+}
+
+void qedi_free_id(struct qedi_portid_tbl *id_tbl, u16 id)
+{
+	if (id == QEDI_LOCAL_PORT_INVALID)
+		return;
+
+	id -= id_tbl->start;
+	if (id >= id_tbl->max)
+		return;
+
+	clear_bit(id, id_tbl->table);
+}
+
+static void qedi_cm_free_mem(struct qedi_ctx *qedi)
+{
+	kfree(qedi->ep_tbl);
+	qedi->ep_tbl = NULL;
+	qedi_free_id_tbl(&qedi->lcl_port_tbl);
+}
+
+static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
+{
+	u16 port_id;
+
+	qedi->ep_tbl = kzalloc((qedi->max_active_conns *
+				sizeof(struct qedi_endpoint *)), GFP_KERNEL);
+	if (!qedi->ep_tbl)
+		return -ENOMEM;
+	port_id = prandom_u32() % QEDI_LOCAL_PORT_RANGE;
+	if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
+			     QEDI_LOCAL_PORT_MIN, port_id)) {
+		qedi_cm_free_mem(qedi);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static struct qedi_ctx *qedi_host_alloc(struct pci_dev *pdev)
+{
+	struct Scsi_Host *shost;
+	struct qedi_ctx *qedi = NULL;
+
+	shost = iscsi_host_alloc(&qedi_host_template,
+				 sizeof(struct qedi_ctx), 0);
+	if (!shost) {
+		QEDI_ERR(NULL, "Could not allocate shost\n");
+		goto exit_setup_shost;
+	}
+
+	shost->max_id = QEDI_MAX_ISCSI_CONNS_PER_HBA;
+	shost->max_channel = 0;
+	shost->max_lun = ~0;
+	shost->max_cmd_len = 16;
+	shost->transportt = qedi_scsi_transport;
+
+	qedi = iscsi_host_priv(shost);
+	memset(qedi, 0, sizeof(*qedi));
+	qedi->shost = shost;
+	qedi->dbg_ctx.host_no = shost->host_no;
+	qedi->pdev = pdev;
+	qedi->dbg_ctx.pdev = pdev;
+	qedi->max_active_conns = ISCSI_MAX_SESS_PER_HBA;
+	qedi->max_sqes = QEDI_SQ_SIZE;
+
+	if (shost_use_blk_mq(shost))
+		shost->nr_hw_queues = MIN_NUM_CPUS_MSIX(qedi);
+
+	pci_set_drvdata(pdev, qedi);
+
+exit_setup_shost:
+	return qedi;
+}
+
+static int qedi_ll2_rx(void *cookie, struct sk_buff *skb, u32 arg1, u32 arg2)
+{
+	struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
+	struct qedi_uio_dev *udev;
+	struct qedi_uio_ctrl *uctrl;
+	struct skb_work_list *work;
+	u32 prod;
+
+	if (!qedi) {
+		QEDI_ERR(NULL, "qedi is NULL\n");
+		return -1;
+	}
+
+	if (!test_bit(UIO_DEV_OPENED, &qedi->flags)) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UIO,
+			  "UIO DEV is not opened\n");
+		kfree_skb(skb);
+		return 0;
+	}
+
+	udev = qedi->udev;
+	uctrl = udev->uctrl;
+
+	work = kzalloc(sizeof(*work), GFP_ATOMIC);
+	if (!work) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Could not allocate work so dropping frame.\n");
+		kfree_skb(skb);
+		return 0;
+	}
+
+	INIT_LIST_HEAD(&work->list);
+	work->skb = skb;
+
+	if (skb_vlan_tag_present(skb))
+		work->vlan_id = skb_vlan_tag_get(skb);
+
+	if (work->vlan_id)
+		__vlan_insert_tag(work->skb, htons(ETH_P_8021Q), work->vlan_id);
+
+	spin_lock_bh(&qedi->ll2_lock);
+	list_add_tail(&work->list, &qedi->ll2_skb_list);
+
+	++uctrl->hw_rx_prod_cnt;
+	prod = (uctrl->hw_rx_prod + 1) % RX_RING;
+	if (prod != uctrl->host_rx_cons) {
+		uctrl->hw_rx_prod = prod;
+		spin_unlock_bh(&qedi->ll2_lock);
+		wake_up_process(qedi->ll2_recv_thread);
+		return 0;
+	}
+
+	spin_unlock_bh(&qedi->ll2_lock);
+	return 0;
+}
+
+/* map this skb to iscsiuio mmaped region */
+static int qedi_ll2_process_skb(struct qedi_ctx *qedi, struct sk_buff *skb,
+				u16 vlan_id)
+{
+	struct qedi_uio_dev *udev = NULL;
+	struct qedi_uio_ctrl *uctrl = NULL;
+	struct qedi_rx_bd rxbd;
+	struct qedi_rx_bd *p_rxbd;
+	u32 rx_bd_prod;
+	void *pkt;
+	int len = 0;
+
+	if (!qedi) {
+		QEDI_ERR(NULL, "qedi is NULL\n");
+		return -1;
+	}
+
+	udev = qedi->udev;
+	uctrl = udev->uctrl;
+	pkt = udev->rx_pkt + (uctrl->hw_rx_prod * LL2_SINGLE_BUF_SIZE);
+	len = min_t(u32, skb->len, (u32)LL2_SINGLE_BUF_SIZE);
+	memcpy(pkt, skb->data, len);
+
+	memset(&rxbd, 0, sizeof(rxbd));
+	rxbd.rx_pkt_index = uctrl->hw_rx_prod;
+	rxbd.rx_pkt_len = len;
+	rxbd.vlan_id = vlan_id;
+
+	uctrl->hw_rx_bd_prod = (uctrl->hw_rx_bd_prod + 1) % QEDI_NUM_RX_BD;
+	rx_bd_prod = uctrl->hw_rx_bd_prod;
+	p_rxbd = (struct qedi_rx_bd *)udev->ll2_ring;
+	p_rxbd += rx_bd_prod;
+
+	memcpy(p_rxbd, &rxbd, sizeof(rxbd));
+
+	/* notify the iscsiuio about new packet */
+	uio_event_notify(&udev->qedi_uinfo);
+
+	return 0;
+}
+
+static void qedi_ll2_free_skbs(struct qedi_ctx *qedi)
+{
+	struct skb_work_list *work, *work_tmp;
+
+	spin_lock_bh(&qedi->ll2_lock);
+	list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list, list) {
+		list_del(&work->list);
+		if (work->skb)
+			kfree_skb(work->skb);
+		kfree(work);
+	}
+	spin_unlock_bh(&qedi->ll2_lock);
+}
+
+static int qedi_ll2_recv_thread(void *arg)
+{
+	struct qedi_ctx *qedi = (struct qedi_ctx *)arg;
+	struct skb_work_list *work, *work_tmp;
+
+	set_user_nice(current, -20);
+
+	while (!kthread_should_stop()) {
+		spin_lock_bh(&qedi->ll2_lock);
+		list_for_each_entry_safe(work, work_tmp, &qedi->ll2_skb_list,
+					 list) {
+			list_del(&work->list);
+			qedi_ll2_process_skb(qedi, work->skb, work->vlan_id);
+			kfree_skb(work->skb);
+			kfree(work);
+		}
+		set_current_state(TASK_INTERRUPTIBLE);
+		spin_unlock_bh(&qedi->ll2_lock);
+		schedule();
+	}
+
+	__set_current_state(TASK_RUNNING);
+	return 0;
+}
+
+static int qedi_set_iscsi_pf_param(struct qedi_ctx *qedi)
+{
+	u8 num_sq_pages;
+	u32 log_page_size;
+	int rval = 0;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "Min number of MSIX %d\n",
+		  MIN_NUM_CPUS_MSIX(qedi));
+
+	num_sq_pages = (MAX_OUSTANDING_TASKS_PER_CON * 8) / PAGE_SIZE;
+
+	qedi->num_queues = MIN_NUM_CPUS_MSIX(qedi);
+
+	memset(&qedi->pf_params.iscsi_pf_params, 0,
+	       sizeof(qedi->pf_params.iscsi_pf_params));
+
+	qedi->p_cpuq = pci_alloc_consistent(qedi->pdev,
+			qedi->num_queues * sizeof(struct qedi_glbl_q_params),
+			&qedi->hw_p_cpuq);
+	if (!qedi->p_cpuq) {
+		QEDI_ERR(&qedi->dbg_ctx, "pci_alloc_consistent fail\n");
+		rval = -1;
+		goto err_alloc_mem;
+	}
+
+	rval = qedi_alloc_global_queues(qedi);
+	if (rval) {
+		QEDI_ERR(&qedi->dbg_ctx, "Global queue allocation failed.\n");
+		rval = -1;
+		goto err_alloc_mem;
+	}
+
+	qedi->pf_params.iscsi_pf_params.num_cons = QEDI_MAX_ISCSI_CONNS_PER_HBA;
+	qedi->pf_params.iscsi_pf_params.num_tasks = QEDI_MAX_ISCSI_TASK;
+	qedi->pf_params.iscsi_pf_params.half_way_close_timeout = 10;
+	qedi->pf_params.iscsi_pf_params.num_sq_pages_in_ring = num_sq_pages;
+	qedi->pf_params.iscsi_pf_params.num_r2tq_pages_in_ring = num_sq_pages;
+	qedi->pf_params.iscsi_pf_params.num_uhq_pages_in_ring = num_sq_pages;
+	qedi->pf_params.iscsi_pf_params.num_queues = qedi->num_queues;
+	qedi->pf_params.iscsi_pf_params.debug_mode = qedi_fw_debug;
+
+	for (log_page_size = 0 ; log_page_size < 32 ; log_page_size++) {
+		if ((1 << log_page_size) == PAGE_SIZE)
+			break;
+	}
+	qedi->pf_params.iscsi_pf_params.log_page_size = log_page_size;
+
+	qedi->pf_params.iscsi_pf_params.glbl_q_params_addr =
+							   (u64)qedi->hw_p_cpuq;
+
+	/* RQ BDQ initializations.
+	 * rq_num_entries: suggested value for Initiator is 16 (4KB RQ)
+	 * rqe_log_size: 8 for 256B RQE
+	 */
+	qedi->pf_params.iscsi_pf_params.rqe_log_size = 8;
+	/* BDQ address and size */
+	qedi->pf_params.iscsi_pf_params.bdq_pbl_base_addr[BDQ_ID_RQ] =
+							qedi->bdq_pbl_list_dma;
+	qedi->pf_params.iscsi_pf_params.bdq_pbl_num_entries[BDQ_ID_RQ] =
+						qedi->bdq_pbl_list_num_entries;
+	qedi->pf_params.iscsi_pf_params.rq_buffer_size = QEDI_BDQ_BUF_SIZE;
+
+	/* cq_num_entries: num_tasks + rq_num_entries */
+	qedi->pf_params.iscsi_pf_params.cq_num_entries = 2048;
+
+	qedi->pf_params.iscsi_pf_params.gl_rq_pi = QEDI_PROTO_CQ_PROD_IDX;
+	qedi->pf_params.iscsi_pf_params.gl_cmd_pi = 1;
+	qedi->pf_params.iscsi_pf_params.ooo_enable = 1;
+
+err_alloc_mem:
+	return rval;
+}
+
+/* Free DMA coherent memory for array of queue pointers we pass to qed */
+static void qedi_free_iscsi_pf_param(struct qedi_ctx *qedi)
+{
+	size_t size = 0;
+
+	if (qedi->p_cpuq) {
+		size = qedi->num_queues * sizeof(struct qedi_glbl_q_params);
+		pci_free_consistent(qedi->pdev, size, qedi->p_cpuq,
+				    qedi->hw_p_cpuq);
+	}
+
+	qedi_free_global_queues(qedi);
+
+	kfree(qedi->global_queues);
+}
+
+static void qedi_link_update(void *dev, struct qed_link_output *link)
+{
+	struct qedi_ctx *qedi = (struct qedi_ctx *)dev;
+
+	if (link->link_up) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "Link Up event.\n");
+		atomic_set(&qedi->link_state, QEDI_LINK_UP);
+	} else {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+			  "Link Down event.\n");
+		atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
+	}
+}
+
+static struct qed_iscsi_cb_ops qedi_cb_ops = {
+	{
+		.link_update =		qedi_link_update,
+	}
+};
+
+static int qedi_queue_cqe(struct qedi_ctx *qedi, union iscsi_cqe *cqe,
+			  u16 que_idx, struct qedi_percpu_s *p)
+{
+	struct qedi_work *qedi_work;
+	struct qedi_conn *q_conn;
+	struct iscsi_conn *conn;
+	struct qedi_cmd *qedi_cmd;
+	u32 iscsi_cid;
+	int rc = 0;
+
+	iscsi_cid  = cqe->cqe_common.conn_id;
+	q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
+	if (!q_conn) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Session no longer exists for cid=0x%x!!\n",
+			  iscsi_cid);
+		return -1;
+	}
+	conn = q_conn->cls_conn->dd_data;
+
+	switch (cqe->cqe_common.cqe_type) {
+	case ISCSI_CQE_TYPE_SOLICITED:
+	case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
+		qedi_cmd = qedi_get_cmd_from_tid(qedi, cqe->cqe_solicited.itid);
+		if (!qedi_cmd) {
+			rc = -1;
+			break;
+		}
+		INIT_LIST_HEAD(&qedi_cmd->cqe_work.list);
+		qedi_cmd->cqe_work.qedi = qedi;
+		memcpy(&qedi_cmd->cqe_work.cqe, cqe, sizeof(union iscsi_cqe));
+		qedi_cmd->cqe_work.que_idx = que_idx;
+		qedi_cmd->cqe_work.is_solicited = true;
+		list_add_tail(&qedi_cmd->cqe_work.list, &p->work_list);
+		break;
+	case ISCSI_CQE_TYPE_UNSOLICITED:
+	case ISCSI_CQE_TYPE_DUMMY:
+	case ISCSI_CQE_TYPE_TASK_CLEANUP:
+		qedi_work = kzalloc(sizeof(*qedi_work), GFP_ATOMIC);
+		if (!qedi_work) {
+			rc = -1;
+			break;
+		}
+		INIT_LIST_HEAD(&qedi_work->list);
+		qedi_work->qedi = qedi;
+		memcpy(&qedi_work->cqe, cqe, sizeof(union iscsi_cqe));
+		qedi_work->que_idx = que_idx;
+		qedi_work->is_solicited = false;
+		list_add_tail(&qedi_work->list, &p->work_list);
+		break;
+	default:
+		rc = -1;
+		QEDI_ERR(&qedi->dbg_ctx, "FW Error cqe.\n");
+	}
+	return rc;
+}
+
+static bool qedi_process_completions(struct qedi_fastpath *fp)
+{
+	struct qedi_ctx *qedi = fp->qedi;
+	struct qed_sb_info *sb_info = fp->sb_info;
+	struct status_block *sb = sb_info->sb_virt;
+	struct qedi_percpu_s *p = NULL;
+	struct global_queue *que;
+	u16 prod_idx;
+	unsigned long flags;
+	union iscsi_cqe *cqe;
+	int cpu;
+	int ret;
+
+	/* Get the current firmware producer index */
+	prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
+
+	if (prod_idx >= QEDI_CQ_SIZE)
+		prod_idx = prod_idx % QEDI_CQ_SIZE;
+
+	que = qedi->global_queues[fp->sb_id];
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
+		  "Before: global queue=%p prod_idx=%d cons_idx=%d, sb_id=%d\n",
+		  que, prod_idx, que->cq_cons_idx, fp->sb_id);
+
+	qedi->intr_cpu = fp->sb_id;
+	cpu = smp_processor_id();
+	p = &per_cpu(qedi_percpu, cpu);
+
+	if (unlikely(!p->iothread))
+		WARN_ON(1);
+
+	spin_lock_irqsave(&p->p_work_lock, flags);
+	while (que->cq_cons_idx != prod_idx) {
+		cqe = &que->cq[que->cq_cons_idx];
+
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
+			  "cqe=%p prod_idx=%d cons_idx=%d.\n",
+			  cqe, prod_idx, que->cq_cons_idx);
+
+		ret = qedi_queue_cqe(qedi, cqe, fp->sb_id, p);
+		if (ret)
+			continue;
+
+		que->cq_cons_idx++;
+		if (que->cq_cons_idx == QEDI_CQ_SIZE)
+			que->cq_cons_idx = 0;
+	}
+	wake_up_process(p->iothread);
+	spin_unlock_irqrestore(&p->p_work_lock, flags);
+
+	return true;
+}
+
+static bool qedi_fp_has_work(struct qedi_fastpath *fp)
+{
+	struct qedi_ctx *qedi = fp->qedi;
+	struct global_queue *que;
+	struct qed_sb_info *sb_info = fp->sb_info;
+	struct status_block *sb = sb_info->sb_virt;
+	u16 prod_idx;
+
+	barrier();
+
+	/* Get the current firmware producer index */
+	prod_idx = sb->pi_array[QEDI_PROTO_CQ_PROD_IDX];
+
+	/* Get the pointer to the global CQ this completion is on */
+	que = qedi->global_queues[fp->sb_id];
+
+	/* prod idx wrap around uint16 */
+	if (prod_idx >= QEDI_CQ_SIZE)
+		prod_idx = prod_idx % QEDI_CQ_SIZE;
+
+	return (que->cq_cons_idx != prod_idx);
+}
+
+/* MSI-X fastpath handler code */
+static irqreturn_t qedi_msix_handler(int irq, void *dev_id)
+{
+	struct qedi_fastpath *fp = dev_id;
+	struct qedi_ctx *qedi = fp->qedi;
+	bool wake_io_thread = true;
+
+	qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0);
+
+process_again:
+	wake_io_thread = qedi_process_completions(fp);
+	if (wake_io_thread) {
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+			  "process already running\n");
+	}
+
+	if (qedi_fp_has_work(fp) == 0)
+		qed_sb_update_sb_idx(fp->sb_info);
+
+	/* Check for more work */
+	rmb();
+
+	if (qedi_fp_has_work(fp) == 0)
+		qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
+	else
+		goto process_again;
+
+	return IRQ_HANDLED;
+}
+
+/* simd handler for MSI/INTa */
+static void qedi_simd_int_handler(void *cookie)
+{
+	/* Cookie is qedi_ctx struct */
+	struct qedi_ctx *qedi = (struct qedi_ctx *)cookie;
+
+	QEDI_WARN(&qedi->dbg_ctx, "qedi=%p.\n", qedi);
+}
+
+#define QEDI_SIMD_HANDLER_NUM		0
+static void qedi_sync_free_irqs(struct qedi_ctx *qedi)
+{
+	int i;
+
+	if (qedi->int_info.msix_cnt) {
+		for (i = 0; i < qedi->int_info.used_cnt; i++) {
+			synchronize_irq(qedi->int_info.msix[i].vector);
+			irq_set_affinity_hint(qedi->int_info.msix[i].vector,
+					      NULL);
+			free_irq(qedi->int_info.msix[i].vector,
+				 &qedi->fp_array[i]);
+		}
+	} else {
+		qedi_ops->common->simd_handler_clean(qedi->cdev,
+						     QEDI_SIMD_HANDLER_NUM);
+	}
+
+	qedi->int_info.used_cnt = 0;
+	qedi_ops->common->set_fp_int(qedi->cdev, 0);
+}
+
+static int qedi_request_msix_irq(struct qedi_ctx *qedi)
+{
+	int i, rc, cpu;
+
+	cpu = cpumask_first(cpu_online_mask);
+	for (i = 0; i < MIN_NUM_CPUS_MSIX(qedi); i++) {
+		rc = request_irq(qedi->int_info.msix[i].vector,
+				 qedi_msix_handler, 0, "qedi",
+				 &qedi->fp_array[i]);
+
+		if (rc) {
+			QEDI_WARN(&qedi->dbg_ctx, "request_irq failed.\n");
+			qedi_sync_free_irqs(qedi);
+			return rc;
+		}
+		qedi->int_info.used_cnt++;
+		rc = irq_set_affinity_hint(qedi->int_info.msix[i].vector,
+					   get_cpu_mask(cpu));
+		cpu = cpumask_next(cpu, cpu_online_mask);
+	}
+
+	return 0;
+}
+
+static int qedi_setup_int(struct qedi_ctx *qedi)
+{
+	int rc = 0;
+
+	rc = qedi_ops->common->set_fp_int(qedi->cdev, num_online_cpus());
+	rc = qedi_ops->common->get_fp_int(qedi->cdev, &qedi->int_info);
+	if (rc)
+		goto exit_setup_int;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "Number of msix_cnt = 0x%x num of cpus = 0x%x\n",
+		   qedi->int_info.msix_cnt, num_online_cpus());
+
+	if (qedi->int_info.msix_cnt) {
+		rc = qedi_request_msix_irq(qedi);
+		goto exit_setup_int;
+	} else {
+		qedi_ops->common->simd_handler_config(qedi->cdev, &qedi,
+						      QEDI_SIMD_HANDLER_NUM,
+						      qedi_simd_int_handler);
+		qedi->int_info.used_cnt = 1;
+	}
+
+exit_setup_int:
+	return rc;
+}
+
+static void qedi_free_bdq(struct qedi_ctx *qedi)
+{
+	int i;
+
+	if (qedi->bdq_pbl_list)
+		dma_free_coherent(&qedi->pdev->dev, PAGE_SIZE,
+				  qedi->bdq_pbl_list, qedi->bdq_pbl_list_dma);
+
+	if (qedi->bdq_pbl)
+		dma_free_coherent(&qedi->pdev->dev, qedi->bdq_pbl_mem_size,
+				  qedi->bdq_pbl, qedi->bdq_pbl_dma);
+
+	for (i = 0; i < QEDI_BDQ_NUM; i++) {
+		if (qedi->bdq[i].buf_addr) {
+			dma_free_coherent(&qedi->pdev->dev, QEDI_BDQ_BUF_SIZE,
+					  qedi->bdq[i].buf_addr,
+					  qedi->bdq[i].buf_dma);
+		}
+	}
+}
+
+static void qedi_free_global_queues(struct qedi_ctx *qedi)
+{
+	int i;
+	struct global_queue **gl = qedi->global_queues;
+
+	for (i = 0; i < qedi->num_queues; i++) {
+		if (!gl[i])
+			continue;
+
+		if (gl[i]->cq)
+			dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_mem_size,
+					  gl[i]->cq, gl[i]->cq_dma);
+		if (gl[i]->cq_pbl)
+			dma_free_coherent(&qedi->pdev->dev, gl[i]->cq_pbl_size,
+					  gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
+
+		kfree(gl[i]);
+	}
+	qedi_free_bdq(qedi);
+}
+
+static int qedi_alloc_bdq(struct qedi_ctx *qedi)
+{
+	int i;
+	struct scsi_bd *pbl;
+	u64 *list;
+	dma_addr_t page;
+
+	/* Alloc dma memory for BDQ buffers */
+	for (i = 0; i < QEDI_BDQ_NUM; i++) {
+		qedi->bdq[i].buf_addr =
+				dma_alloc_coherent(&qedi->pdev->dev,
+						   QEDI_BDQ_BUF_SIZE,
+						   &qedi->bdq[i].buf_dma,
+						   GFP_KERNEL);
+		if (!qedi->bdq[i].buf_addr) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not allocate BDQ buffer %d.\n", i);
+			return -ENOMEM;
+		}
+	}
+
+	/* Alloc dma memory for BDQ page buffer list */
+	qedi->bdq_pbl_mem_size = QEDI_BDQ_NUM * sizeof(struct scsi_bd);
+	qedi->bdq_pbl_mem_size = ALIGN(qedi->bdq_pbl_mem_size, PAGE_SIZE);
+	qedi->rq_num_entries = qedi->bdq_pbl_mem_size / sizeof(struct scsi_bd);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN, "rq_num_entries = %d.\n",
+		  qedi->rq_num_entries);
+
+	qedi->bdq_pbl = dma_alloc_coherent(&qedi->pdev->dev,
+					   qedi->bdq_pbl_mem_size,
+					   &qedi->bdq_pbl_dma, GFP_KERNEL);
+	if (!qedi->bdq_pbl) {
+		QEDI_ERR(&qedi->dbg_ctx, "Could not allocate BDQ PBL.\n");
+		return -ENOMEM;
+	}
+
+	/*
+	 * Populate BDQ PBL with physical and virtual address of individual
+	 * BDQ buffers
+	 */
+	pbl = (struct scsi_bd  *)qedi->bdq_pbl;
+	for (i = 0; i < QEDI_BDQ_NUM; i++) {
+		pbl->address.hi =
+				cpu_to_le32(QEDI_U64_HI(qedi->bdq[i].buf_dma));
+		pbl->address.lo =
+				cpu_to_le32(QEDI_U64_LO(qedi->bdq[i].buf_dma));
+		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+			  "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx], idx [%d]\n",
+			  pbl, pbl->address.hi, pbl->address.lo, i);
+		pbl->opaque.hi = 0;
+		pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(i));
+		pbl++;
+	}
+
+	/* Allocate list of PBL pages */
+	qedi->bdq_pbl_list = dma_alloc_coherent(&qedi->pdev->dev,
+						PAGE_SIZE,
+						&qedi->bdq_pbl_list_dma,
+						GFP_KERNEL);
+	if (!qedi->bdq_pbl_list) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Could not allocate list of PBL pages.\n");
+		return -ENOMEM;
+	}
+	memset(qedi->bdq_pbl_list, 0, PAGE_SIZE);
+
+	/*
+	 * Now populate PBL list with pages that contain pointers to the
+	 * individual buffers.
+	 */
+	qedi->bdq_pbl_list_num_entries = qedi->bdq_pbl_mem_size / PAGE_SIZE;
+	list = (u64 *)qedi->bdq_pbl_list;
+	page = qedi->bdq_pbl_list_dma;
+	for (i = 0; i < qedi->bdq_pbl_list_num_entries; i++) {
+		*list = qedi->bdq_pbl_dma;
+		list++;
+		page += PAGE_SIZE;
+	}
+
+	return 0;
+}
+
+static int qedi_alloc_global_queues(struct qedi_ctx *qedi)
+{
+	u32 *list;
+	int i;
+	int status = 0, rc;
+	u32 *pbl;
+	dma_addr_t page;
+	int num_pages;
+
+	/*
+	 * Number of global queues (CQ / RQ). This should
+	 * be <= number of available MSIX vectors for the PF
+	 */
+	if (!qedi->num_queues) {
+		QEDI_ERR(&qedi->dbg_ctx, "No MSI-X vectors available!\n");
+		return 1;
+	}
+
+	/* Make sure we allocated the PBL that will contain the physical
+	 * addresses of our queues
+	 */
+	if (!qedi->p_cpuq) {
+		status = 1;
+		goto mem_alloc_failure;
+	}
+
+	qedi->global_queues = kzalloc((sizeof(struct global_queue *) *
+				       qedi->num_queues), GFP_KERNEL);
+	if (!qedi->global_queues) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Unable to allocate global queues array ptr memory\n");
+		return -ENOMEM;
+	}
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "qedi->global_queues=%p.\n", qedi->global_queues);
+
+	/* Allocate DMA coherent buffers for BDQ */
+	rc = qedi_alloc_bdq(qedi);
+	if (rc)
+		goto mem_alloc_failure;
+
+	/* Allocate a CQ and an associated PBL for each MSI-X
+	 * vector.
+	 */
+	for (i = 0; i < qedi->num_queues; i++) {
+		qedi->global_queues[i] =
+					kzalloc(sizeof(*qedi->global_queues[0]),
+						GFP_KERNEL);
+		if (!qedi->global_queues[i]) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Unable to allocation global queue %d.\n", i);
+			goto mem_alloc_failure;
+		}
+
+		qedi->global_queues[i]->cq_mem_size =
+		    (QEDI_CQ_SIZE + 8) * sizeof(union iscsi_cqe);
+		qedi->global_queues[i]->cq_mem_size =
+		    (qedi->global_queues[i]->cq_mem_size +
+		    (QEDI_PAGE_SIZE - 1));
+
+		qedi->global_queues[i]->cq_pbl_size =
+		    (qedi->global_queues[i]->cq_mem_size /
+		    QEDI_PAGE_SIZE) * sizeof(void *);
+		qedi->global_queues[i]->cq_pbl_size =
+		    (qedi->global_queues[i]->cq_pbl_size +
+		    (QEDI_PAGE_SIZE - 1));
+
+		qedi->global_queues[i]->cq =
+		    dma_alloc_coherent(&qedi->pdev->dev,
+				       qedi->global_queues[i]->cq_mem_size,
+				       &qedi->global_queues[i]->cq_dma,
+				       GFP_KERNEL);
+
+		if (!qedi->global_queues[i]->cq) {
+			QEDI_WARN(&qedi->dbg_ctx,
+				  "Could not allocate cq.\n");
+			status = -ENOMEM;
+			goto mem_alloc_failure;
+		}
+		memset(qedi->global_queues[i]->cq, 0,
+		       qedi->global_queues[i]->cq_mem_size);
+
+		qedi->global_queues[i]->cq_pbl =
+		    dma_alloc_coherent(&qedi->pdev->dev,
+				       qedi->global_queues[i]->cq_pbl_size,
+				       &qedi->global_queues[i]->cq_pbl_dma,
+				       GFP_KERNEL);
+
+		if (!qedi->global_queues[i]->cq_pbl) {
+			QEDI_WARN(&qedi->dbg_ctx,
+				  "Could not allocate cq PBL.\n");
+			status = -ENOMEM;
+			goto mem_alloc_failure;
+		}
+		memset(qedi->global_queues[i]->cq_pbl, 0,
+		       qedi->global_queues[i]->cq_pbl_size);
+
+		/* Create PBL */
+		num_pages = qedi->global_queues[i]->cq_mem_size /
+		    QEDI_PAGE_SIZE;
+		page = qedi->global_queues[i]->cq_dma;
+		pbl = (u32 *)qedi->global_queues[i]->cq_pbl;
+
+		while (num_pages--) {
+			*pbl = (u32)page;
+			pbl++;
+			*pbl = (u32)((u64)page >> 32);
+			pbl++;
+			page += QEDI_PAGE_SIZE;
+		}
+	}
+
+	list = (u32 *)qedi->p_cpuq;
+
+	/*
+	 * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
+	 * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
+	 * to the physical address which contains an array of pointers to the
+	 * physical addresses of the specific queue pages.
+	 */
+	for (i = 0; i < qedi->num_queues; i++) {
+		*list = (u32)qedi->global_queues[i]->cq_pbl_dma;
+		list++;
+		*list = (u32)((u64)qedi->global_queues[i]->cq_pbl_dma >> 32);
+		list++;
+
+		*list = (u32)0;
+		list++;
+		*list = (u32)((u64)0 >> 32);
+		list++;
+	}
+
+	return 0;
+
+mem_alloc_failure:
+	qedi_free_global_queues(qedi);
+	return status;
+}
+
+int qedi_alloc_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
+{
+	int rval = 0;
+	u32 *pbl;
+	dma_addr_t page;
+	int num_pages;
+
+	if (!ep)
+		return -EIO;
+
+	/* Calculate appropriate queue and PBL sizes */
+	ep->sq_mem_size = QEDI_SQ_SIZE * sizeof(struct iscsi_wqe);
+	ep->sq_mem_size += QEDI_PAGE_SIZE - 1;
+
+	ep->sq_pbl_size = (ep->sq_mem_size / QEDI_PAGE_SIZE) * sizeof(void *);
+	ep->sq_pbl_size = ep->sq_pbl_size + QEDI_PAGE_SIZE;
+
+	ep->sq = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_mem_size,
+				    &ep->sq_dma, GFP_KERNEL);
+	if (!ep->sq) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Could not allocate send queue.\n");
+		rval = -ENOMEM;
+		goto out;
+	}
+	memset(ep->sq, 0, ep->sq_mem_size);
+
+	ep->sq_pbl = dma_alloc_coherent(&qedi->pdev->dev, ep->sq_pbl_size,
+					&ep->sq_pbl_dma, GFP_KERNEL);
+	if (!ep->sq_pbl) {
+		QEDI_WARN(&qedi->dbg_ctx,
+			  "Could not allocate send queue PBL.\n");
+		rval = -ENOMEM;
+		goto out_free_sq;
+	}
+	memset(ep->sq_pbl, 0, ep->sq_pbl_size);
+
+	/* Create PBL */
+	num_pages = ep->sq_mem_size / QEDI_PAGE_SIZE;
+	page = ep->sq_dma;
+	pbl = (u32 *)ep->sq_pbl;
+
+	while (num_pages--) {
+		*pbl = (u32)page;
+		pbl++;
+		*pbl = (u32)((u64)page >> 32);
+		pbl++;
+		page += QEDI_PAGE_SIZE;
+	}
+
+	return rval;
+
+out_free_sq:
+	dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
+			  ep->sq_dma);
+out:
+	return rval;
+}
+
+void qedi_free_sq(struct qedi_ctx *qedi, struct qedi_endpoint *ep)
+{
+	if (ep->sq_pbl)
+		dma_free_coherent(&qedi->pdev->dev, ep->sq_pbl_size, ep->sq_pbl,
+				  ep->sq_pbl_dma);
+	if (ep->sq)
+		dma_free_coherent(&qedi->pdev->dev, ep->sq_mem_size, ep->sq,
+				  ep->sq_dma);
+}
+
+int qedi_get_task_idx(struct qedi_ctx *qedi)
+{
+	s16 tmp_idx;
+
+again:
+	tmp_idx = find_first_zero_bit(qedi->task_idx_map,
+				      MAX_ISCSI_TASK_ENTRIES);
+
+	if (tmp_idx >= MAX_ISCSI_TASK_ENTRIES) {
+		QEDI_ERR(&qedi->dbg_ctx, "FW task context pool is full.\n");
+		tmp_idx = -1;
+		goto err_idx;
+	}
+
+	if (test_and_set_bit(tmp_idx, qedi->task_idx_map))
+		goto again;
+
+err_idx:
+	return tmp_idx;
+}
+
+void qedi_clear_task_idx(struct qedi_ctx *qedi, int idx)
+{
+	if (!test_and_clear_bit(idx, qedi->task_idx_map)) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "FW task context, already cleared, tid=0x%x\n", idx);
+		WARN_ON(1);
+	}
+}
+
+void qedi_update_itt_map(struct qedi_ctx *qedi, u32 tid, u32 proto_itt,
+			 struct qedi_cmd *cmd)
+{
+	qedi->itt_map[tid].itt = proto_itt;
+	qedi->itt_map[tid].p_cmd = cmd;
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "update itt map tid=0x%x, with proto itt=0x%x\n", tid,
+		  qedi->itt_map[tid].itt);
+}
+
+void qedi_get_task_tid(struct qedi_ctx *qedi, u32 itt, s16 *tid)
+{
+	u16 i;
+
+	for (i = 0; i < MAX_ISCSI_TASK_ENTRIES; i++) {
+		if (qedi->itt_map[i].itt == itt) {
+			*tid = i;
+			QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+				  "Ref itt=0x%x, found at tid=0x%x\n",
+				  itt, *tid);
+			return;
+		}
+	}
+
+	WARN_ON(1);
+}
+
+void qedi_get_proto_itt(struct qedi_ctx *qedi, u32 tid, u32 *proto_itt)
+{
+	*proto_itt = qedi->itt_map[tid].itt;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
+		  "Get itt map tid [0x%x with proto itt[0x%x]",
+		  tid, *proto_itt);
+}
+
+struct qedi_cmd *qedi_get_cmd_from_tid(struct qedi_ctx *qedi, u32 tid)
+{
+	struct qedi_cmd *cmd = NULL;
+
+	if (tid > MAX_ISCSI_TASK_ENTRIES)
+		return NULL;
+
+	cmd = qedi->itt_map[tid].p_cmd;
+	if (cmd->task_id != tid)
+		return NULL;
+
+	qedi->itt_map[tid].p_cmd = NULL;
+
+	return cmd;
+}
+
+static int qedi_alloc_itt(struct qedi_ctx *qedi)
+{
+	qedi->itt_map = kcalloc(MAX_ISCSI_TASK_ENTRIES,
+				sizeof(struct qedi_itt_map), GFP_KERNEL);
+	if (!qedi->itt_map) {
+		QEDI_ERR(&qedi->dbg_ctx,
+			 "Unable to allocate itt map array memory\n");
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+static void qedi_free_itt(struct qedi_ctx *qedi)
+{
+	kfree(qedi->itt_map);
+}
+
+static struct qed_ll2_cb_ops qedi_ll2_cb_ops = {
+	.rx_cb = qedi_ll2_rx,
+	.tx_cb = NULL,
+};
+
+static int qedi_percpu_io_thread(void *arg)
+{
+	struct qedi_percpu_s *p = arg;
+	struct qedi_work *work, *tmp;
+	unsigned long flags;
+	LIST_HEAD(work_list);
+
+	set_user_nice(current, -20);
+
+	while (!kthread_should_stop()) {
+		spin_lock_irqsave(&p->p_work_lock, flags);
+		while (!list_empty(&p->work_list)) {
+			list_splice_init(&p->work_list, &work_list);
+			spin_unlock_irqrestore(&p->p_work_lock, flags);
+
+			list_for_each_entry_safe(work, tmp, &work_list, list) {
+				list_del_init(&work->list);
+				qedi_fp_process_cqes(work);
+				if (!work->is_solicited)
+					kfree(work);
+			}
+			cond_resched();
+			spin_lock_irqsave(&p->p_work_lock, flags);
+		}
+		set_current_state(TASK_INTERRUPTIBLE);
+		spin_unlock_irqrestore(&p->p_work_lock, flags);
+		schedule();
+	}
+	__set_current_state(TASK_RUNNING);
+
+	return 0;
+}
+
+static void qedi_percpu_thread_create(unsigned int cpu)
+{
+	struct qedi_percpu_s *p;
+	struct task_struct *thread;
+
+	p = &per_cpu(qedi_percpu, cpu);
+
+	thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
+					cpu_to_node(cpu),
+					"qedi_thread/%d", cpu);
+	if (likely(!IS_ERR(thread))) {
+		kthread_bind(thread, cpu);
+		p->iothread = thread;
+		wake_up_process(thread);
+	}
+}
+
+static void qedi_percpu_thread_destroy(unsigned int cpu)
+{
+	struct qedi_percpu_s *p;
+	struct task_struct *thread;
+	struct qedi_work *work, *tmp;
+
+	p = &per_cpu(qedi_percpu, cpu);
+	spin_lock_bh(&p->p_work_lock);
+	thread = p->iothread;
+	p->iothread = NULL;
+
+	list_for_each_entry_safe(work, tmp, &p->work_list, list) {
+		list_del_init(&work->list);
+		qedi_fp_process_cqes(work);
+		if (!work->is_solicited)
+			kfree(work);
+	}
+
+	spin_unlock_bh(&p->p_work_lock);
+	if (thread)
+		kthread_stop(thread);
+}
+
+static int qedi_cpu_callback(struct notifier_block *nfb,
+			     unsigned long action, void *hcpu)
+{
+	unsigned int cpu = (unsigned long)hcpu;
+
+	switch (action) {
+	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
+		QEDI_ERR(NULL, "CPU %d online.\n", cpu);
+		qedi_percpu_thread_create(cpu);
+		break;
+	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
+		QEDI_ERR(NULL, "CPU %d offline.\n", cpu);
+		qedi_percpu_thread_destroy(cpu);
+		break;
+	default:
+		break;
+	}
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block qedi_cpu_notifier = {
+	.notifier_call = qedi_cpu_callback,
+};
+
+void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
+{
+	struct qed_ll2_params params;
+
+	qedi_recover_all_conns(qedi);
+
+	qedi_ops->ll2->stop(qedi->cdev);
+	qedi_ll2_free_skbs(qedi);
+
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO, "old MTU %u, new MTU %u\n",
+		  qedi->ll2_mtu, mtu);
+	memset(&params, 0, sizeof(params));
+	qedi->ll2_mtu = mtu;
+	params.mtu = qedi->ll2_mtu + IPV6_HDR_LEN + TCP_HDR_LEN;
+	params.drop_ttl0_packets = 0;
+	params.rx_vlan_stripping = 1;
+	ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
+	qedi_ops->ll2->start(qedi->cdev, &params);
+}
+
+static void __qedi_remove(struct pci_dev *pdev, int mode)
+{
+	struct qedi_ctx *qedi = pci_get_drvdata(pdev);
+
+	if (qedi->tmf_thread) {
+		flush_workqueue(qedi->tmf_thread);
+		destroy_workqueue(qedi->tmf_thread);
+		qedi->tmf_thread = NULL;
+	}
+
+	if (qedi->offload_thread) {
+		flush_workqueue(qedi->offload_thread);
+		destroy_workqueue(qedi->offload_thread);
+		qedi->offload_thread = NULL;
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_host_exit(&qedi->dbg_ctx);
+#endif
+	if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags))
+		qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
+
+	qedi_sync_free_irqs(qedi);
+
+	if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
+		qedi_ops->stop(qedi->cdev);
+		qedi_ops->ll2->stop(qedi->cdev);
+	}
+
+	if (mode == QEDI_MODE_NORMAL)
+		qedi_free_iscsi_pf_param(qedi);
+
+	if (!test_bit(QEDI_IN_OFFLINE, &qedi->flags)) {
+		qedi_ops->common->slowpath_stop(qedi->cdev);
+		qedi_ops->common->remove(qedi->cdev);
+	}
+
+	qedi_destroy_fp(qedi);
+
+	if (mode == QEDI_MODE_NORMAL) {
+		qedi_release_cid_que(qedi);
+		qedi_cm_free_mem(qedi);
+		qedi_free_uio(qedi->udev);
+		qedi_free_itt(qedi);
+
+		iscsi_host_remove(qedi->shost);
+		iscsi_host_free(qedi->shost);
+
+		if (qedi->ll2_recv_thread) {
+			kthread_stop(qedi->ll2_recv_thread);
+			qedi->ll2_recv_thread = NULL;
+		}
+		qedi_ll2_free_skbs(qedi);
+	}
+}
+
+static int __qedi_probe(struct pci_dev *pdev, int mode)
+{
+	struct qedi_ctx *qedi;
+	struct qed_ll2_params params;
+	u32 dp_module = 0;
+	u8 dp_level = 0;
+	bool is_vf = false;
+	char host_buf[16];
+	struct qed_link_params link_params;
+	struct qed_slowpath_params sp_params;
+	struct qed_probe_params qed_params;
+	void *task_start, *task_end;
+	int rc;
+	u16 tmp;
+
+	if (mode != QEDI_MODE_RECOVERY) {
+		qedi = qedi_host_alloc(pdev);
+		if (!qedi) {
+			rc = -ENOMEM;
+			goto exit_probe;
+		}
+	} else {
+		qedi = pci_get_drvdata(pdev);
+	}
+
+	memset(&qed_params, 0, sizeof(qed_params));
+	qed_params.protocol = QED_PROTOCOL_ISCSI;
+	qed_params.dp_module = dp_module;
+	qed_params.dp_level = dp_level;
+	qed_params.is_vf = is_vf;
+	qedi->cdev = qedi_ops->common->probe(pdev, &qed_params);
+	if (!qedi->cdev) {
+		rc = -ENODEV;
+		QEDI_ERR(&qedi->dbg_ctx, "Cannot initialize hardware\n");
+		goto free_host;
+	}
+
+	qedi->msix_count = MAX_NUM_MSIX_PF;
+	atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
+
+	if (mode != QEDI_MODE_RECOVERY) {
+		rc = qedi_set_iscsi_pf_param(qedi);
+		if (rc) {
+			rc = -ENOMEM;
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Set iSCSI pf param fail\n");
+			goto free_host;
+		}
+	}
+
+	qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
+
+	rc = qedi_prepare_fp(qedi);
+	if (rc) {
+		QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath.\n");
+		goto free_pf_params;
+	}
+
+	/* Start the Slowpath-process */
+	memset(&sp_params, 0, sizeof(struct qed_slowpath_params));
+	sp_params.int_mode = QED_INT_MODE_MSIX;
+	sp_params.drv_major = QEDI_DRIVER_MAJOR_VER;
+	sp_params.drv_minor = QEDI_DRIVER_MINOR_VER;
+	sp_params.drv_rev = QEDI_DRIVER_REV_VER;
+	sp_params.drv_eng = QEDI_DRIVER_ENG_VER;
+	strlcpy(sp_params.name, "qedi iSCSI", QED_DRV_VER_STR_SIZE);
+	rc = qedi_ops->common->slowpath_start(qedi->cdev, &sp_params);
+	if (rc) {
+		QEDI_ERR(&qedi->dbg_ctx, "Cannot start slowpath\n");
+		goto stop_hw;
+	}
+
+	/* update_pf_params needs to be called before and after slowpath
+	 * start
+	 */
+	qedi_ops->common->update_pf_params(qedi->cdev, &qedi->pf_params);
+
+	qedi_setup_int(qedi);
+	if (rc)
+		goto stop_iscsi_func;
+
+	qedi_ops->common->set_power_state(qedi->cdev, PCI_D0);
+
+	/* Learn information crucial for qedi to progress */
+	rc = qedi_ops->fill_dev_info(qedi->cdev, &qedi->dev_info);
+	if (rc)
+		goto stop_iscsi_func;
+
+	/* Record BDQ producer doorbell addresses */
+	qedi->bdq_primary_prod = qedi->dev_info.primary_dbq_rq_addr;
+	qedi->bdq_secondary_prod = qedi->dev_info.secondary_bdq_rq_addr;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "BDQ primary_prod=%p secondary_prod=%p.\n",
+		  qedi->bdq_primary_prod,
+		  qedi->bdq_secondary_prod);
+
+	/*
+	 * We need to write the number of BDs in the BDQ we've preallocated so
+	 * the f/w will do a prefetch and we'll get an unsolicited CQE when a
+	 * packet arrives.
+	 */
+	qedi->bdq_prod_idx = QEDI_BDQ_NUM;
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "Writing %d to primary and secondary BDQ doorbell registers.\n",
+		  qedi->bdq_prod_idx);
+	writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
+	tmp = readw(qedi->bdq_primary_prod);
+	writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
+	tmp = readw(qedi->bdq_secondary_prod);
+
+	ether_addr_copy(qedi->mac, qedi->dev_info.common.hw_mac);
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC, "MAC address is %pM.\n",
+		  qedi->mac);
+
+	sprintf(host_buf, "host_%d", qedi->shost->host_no);
+	qedi_ops->common->set_id(qedi->cdev, host_buf, QEDI_MODULE_VERSION);
+
+	qedi_ops->register_ops(qedi->cdev, &qedi_cb_ops, qedi);
+
+	memset(&params, 0, sizeof(params));
+	params.mtu = DEF_PATH_MTU + IPV6_HDR_LEN + TCP_HDR_LEN;
+	qedi->ll2_mtu = DEF_PATH_MTU;
+	params.drop_ttl0_packets = 0;
+	params.rx_vlan_stripping = 1;
+	ether_addr_copy(params.ll2_mac_address, qedi->dev_info.common.hw_mac);
+
+	if (mode != QEDI_MODE_RECOVERY) {
+		/* set up rx path */
+		INIT_LIST_HEAD(&qedi->ll2_skb_list);
+		spin_lock_init(&qedi->ll2_lock);
+		/* start qedi context */
+		spin_lock_init(&qedi->hba_lock);
+		spin_lock_init(&qedi->task_idx_lock);
+	}
+	qedi_ops->ll2->register_cb_ops(qedi->cdev, &qedi_ll2_cb_ops, qedi);
+	qedi_ops->ll2->start(qedi->cdev, &params);
+
+	if (mode != QEDI_MODE_RECOVERY) {
+		qedi->ll2_recv_thread = kthread_run(qedi_ll2_recv_thread,
+						    (void *)qedi,
+						    "qedi_ll2_thread");
+	}
+
+	rc = qedi_ops->start(qedi->cdev, &qedi->tasks,
+			     qedi, qedi_iscsi_event_cb);
+	if (rc) {
+		rc = -ENODEV;
+		QEDI_ERR(&qedi->dbg_ctx, "Cannot start iSCSI function\n");
+		goto stop_slowpath;
+	}
+
+	task_start = qedi_get_task_mem(&qedi->tasks, 0);
+	task_end = qedi_get_task_mem(&qedi->tasks, MAX_TID_BLOCKS_ISCSI - 1);
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_DISC,
+		  "Task context start=%p, end=%p block_size=%u.\n",
+		   task_start, task_end, qedi->tasks.size);
+
+	memset(&link_params, 0, sizeof(link_params));
+	link_params.link_up = true;
+	rc = qedi_ops->common->set_link(qedi->cdev, &link_params);
+	if (rc) {
+		QEDI_WARN(&qedi->dbg_ctx, "Link set up failed.\n");
+		atomic_set(&qedi->link_state, QEDI_LINK_DOWN);
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_host_init(&qedi->dbg_ctx, &qedi_debugfs_ops,
+			   &qedi_dbg_fops);
+#endif
+	QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
+		  "QLogic FastLinQ iSCSI Module qedi %s, FW %d.%d.%d.%d\n",
+		  QEDI_MODULE_VERSION, FW_MAJOR_VERSION, FW_MINOR_VERSION,
+		  FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
+
+	if (mode == QEDI_MODE_NORMAL) {
+		if (iscsi_host_add(qedi->shost, &pdev->dev)) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not add iscsi host\n");
+			rc = -ENOMEM;
+			goto remove_host;
+		}
+
+		/* Allocate uio buffers */
+		rc = qedi_alloc_uio_rings(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "UIO alloc ring failed err=%d\n", rc);
+			goto remove_host;
+		}
+
+		rc = qedi_init_uio(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "UIO init failed, err=%d\n", rc);
+			goto free_uio;
+		}
+
+		/* host the array on iscsi_conn */
+		rc = qedi_setup_cid_que(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not setup cid que\n");
+			goto free_uio;
+		}
+
+		rc = qedi_cm_alloc_mem(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not alloc cm memory\n");
+			goto free_cid_que;
+		}
+
+		rc = qedi_alloc_itt(qedi);
+		if (rc) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Could not alloc itt memory\n");
+			goto free_cid_que;
+		}
+
+		sprintf(host_buf, "host_%d", qedi->shost->host_no);
+		qedi->tmf_thread = create_singlethread_workqueue(host_buf);
+		if (!qedi->tmf_thread) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Unable to start tmf thread!\n");
+			rc = -ENODEV;
+			goto free_cid_que;
+		}
+
+		sprintf(host_buf, "qedi_ofld%d", qedi->shost->host_no);
+		qedi->offload_thread = create_workqueue(host_buf);
+		if (!qedi->offload_thread) {
+			QEDI_ERR(&qedi->dbg_ctx,
+				 "Unable to start offload thread!\n");
+			rc = -ENODEV;
+			goto free_cid_que;
+		}
+
+		/* F/w needs 1st task context memory entry for performance */
+		set_bit(QEDI_RESERVE_TASK_ID, qedi->task_idx_map);
+		atomic_set(&qedi->num_offloads, 0);
+	}
+
+	return 0;
+
+free_cid_que:
+	qedi_release_cid_que(qedi);
+free_uio:
+	qedi_free_uio(qedi->udev);
+remove_host:
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_host_exit(&qedi->dbg_ctx);
+#endif
+	iscsi_host_remove(qedi->shost);
+stop_iscsi_func:
+	qedi_ops->stop(qedi->cdev);
+stop_slowpath:
+	qedi_ops->common->slowpath_stop(qedi->cdev);
+stop_hw:
+	qedi_ops->common->remove(qedi->cdev);
+free_pf_params:
+	qedi_free_iscsi_pf_param(qedi);
+free_host:
+	iscsi_host_free(qedi->shost);
+exit_probe:
+	return rc;
+}
+
+static int qedi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	return __qedi_probe(pdev, QEDI_MODE_NORMAL);
+}
+
+static void qedi_remove(struct pci_dev *pdev)
+{
+	__qedi_remove(pdev, QEDI_MODE_NORMAL);
+}
+
+static struct pci_device_id qedi_pci_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165E) },
+	{ 0 },
+};
+MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
+
+static struct pci_driver qedi_pci_driver = {
+	.name = QEDI_MODULE_NAME,
+	.id_table = qedi_pci_tbl,
+	.probe = qedi_probe,
+	.remove = qedi_remove,
+};
+
+static int __init qedi_init(void)
+{
+	int rc = 0;
+	int ret;
+	struct qedi_percpu_s *p;
+	unsigned int cpu = 0;
+
+	qedi_ops = qed_get_iscsi_ops();
+	if (!qedi_ops) {
+		QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
+		rc = -EINVAL;
+		goto exit_qedi_init_0;
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_init("qedi");
+#endif
+
+	qedi_scsi_transport = iscsi_register_transport(&qedi_iscsi_transport);
+	if (!qedi_scsi_transport) {
+		QEDI_ERR(NULL, "Could not register qedi transport");
+		rc = -ENOMEM;
+		goto exit_qedi_init_1;
+	}
+
+	register_hotcpu_notifier(&qedi_cpu_notifier);
+
+	ret = pci_register_driver(&qedi_pci_driver);
+	if (ret) {
+		QEDI_ERR(NULL, "Failed to register driver\n");
+		rc = -EINVAL;
+		goto exit_qedi_init_2;
+	}
+
+	for_each_possible_cpu(cpu) {
+		p = &per_cpu(qedi_percpu, cpu);
+		INIT_LIST_HEAD(&p->work_list);
+		spin_lock_init(&p->p_work_lock);
+		p->iothread = NULL;
+	}
+
+	for_each_online_cpu(cpu)
+		qedi_percpu_thread_create(cpu);
+
+	return rc;
+
+exit_qedi_init_2:
+	iscsi_unregister_transport(&qedi_iscsi_transport);
+exit_qedi_init_1:
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_exit();
+#endif
+	qed_put_iscsi_ops();
+exit_qedi_init_0:
+	return rc;
+}
+
+static void __exit qedi_cleanup(void)
+{
+	unsigned int cpu = 0;
+
+	for_each_online_cpu(cpu)
+		qedi_percpu_thread_destroy(cpu);
+
+	pci_unregister_driver(&qedi_pci_driver);
+	unregister_hotcpu_notifier(&qedi_cpu_notifier);
+	iscsi_unregister_transport(&qedi_iscsi_transport);
+
+#ifdef CONFIG_DEBUG_FS
+	qedi_dbg_exit();
+#endif
+	qed_put_iscsi_ops();
+}
+
+MODULE_DESCRIPTION("QLogic FastLinQ 4xxxx iSCSI Module");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("QLogic Corporation");
+MODULE_VERSION(QEDI_MODULE_VERSION);
+module_init(qedi_init);
+module_exit(qedi_cleanup);

drivers/scsi/qedi/qedi_sysfs.c

@@ -0,0 +1,52 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#include "qedi.h"
+#include "qedi_gbl.h"
+#include "qedi_iscsi.h"
+#include "qedi_dbg.h"
+
+static inline struct qedi_ctx *qedi_dev_to_hba(struct device *dev)
+{
+	struct Scsi_Host *shost = class_to_shost(dev);
+
+	return iscsi_host_priv(shost);
+}
+
+static ssize_t qedi_show_port_state(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct qedi_ctx *qedi = qedi_dev_to_hba(dev);
+
+	if (atomic_read(&qedi->link_state) == QEDI_LINK_UP)
+		return sprintf(buf, "Online\n");
+	else
+		return sprintf(buf, "Linkdown\n");
+}
+
+static ssize_t qedi_show_speed(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct qedi_ctx *qedi = qedi_dev_to_hba(dev);
+	struct qed_link_output if_link;
+
+	qedi_ops->common->get_link(qedi->cdev, &if_link);
+
+	return sprintf(buf, "%d Gbit\n", if_link.speed / 1000);
+}
+
+static DEVICE_ATTR(port_state, 0444, qedi_show_port_state, NULL);
+static DEVICE_ATTR(speed, 0444, qedi_show_speed, NULL);
+
+struct device_attribute *qedi_shost_attrs[] = {
+	&dev_attr_port_state,
+	&dev_attr_speed,
+	NULL
+};

drivers/scsi/qedi/qedi_version.h

@@ -0,0 +1,14 @@
+/*
+ * QLogic iSCSI Offload Driver
+ * Copyright (c) 2016 Cavium Inc.
+ *
+ * This software is available under the terms of the GNU General Public License
+ * (GPL) Version 2, available from the file COPYING in the main directory of
+ * this source tree.
+ */
+
+#define QEDI_MODULE_VERSION	"8.10.3.0"
+#define QEDI_DRIVER_MAJOR_VER		8
+#define QEDI_DRIVER_MINOR_VER		10
+#define QEDI_DRIVER_REV_VER		3
+#define QEDI_DRIVER_ENG_VER		0

drivers/scsi/qla2xxx/qla_attr.c

@@ -1988,9 +1988,9 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
 	scsi_qla_host_t *base_vha = shost_priv(fc_vport->shost);
 	scsi_qla_host_t *vha = NULL;
 	struct qla_hw_data *ha = base_vha->hw;
-	uint16_t options = 0;
 	int	cnt;
 	struct req_que *req = ha->req_q_map[0];
+	struct qla_qpair *qpair;
 
 	ret = qla24xx_vport_create_req_sanity_check(fc_vport);
 	if (ret) {
@@ -2075,15 +2075,9 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
 	qlt_vport_create(vha, ha);
 	qla24xx_vport_disable(fc_vport, disable);
 
-	if (ha->flags.cpu_affinity_enabled) {
-		req = ha->req_q_map[1];
-		ql_dbg(ql_dbg_multiq, vha, 0xc000,
-		    "Request queue %p attached with "
-		    "VP[%d], cpu affinity =%d\n",
-		    req, vha->vp_idx, ha->flags.cpu_affinity_enabled);
-		goto vport_queue;
-	} else if (ql2xmaxqueues == 1 || !ha->npiv_info)
+	if (!ql2xmqsupport || !ha->npiv_info)
 		goto vport_queue;
+
 	/* Create a request queue in QoS mode for the vport */
 	for (cnt = 0; cnt < ha->nvram_npiv_size; cnt++) {
 		if (memcmp(ha->npiv_info[cnt].port_name, vha->port_name, 8) == 0
@@ -2095,20 +2089,20 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
 	}
 
 	if (qos) {
-		ret = qla25xx_create_req_que(ha, options, vha->vp_idx, 0, 0,
-			qos);
-		if (!ret)
+		qpair = qla2xxx_create_qpair(vha, qos, vha->vp_idx);
+		if (!qpair)
 			ql_log(ql_log_warn, vha, 0x7084,
-			    "Can't create request queue for VP[%d]\n",
+			    "Can't create qpair for VP[%d]\n",
 			    vha->vp_idx);
 		else {
 			ql_dbg(ql_dbg_multiq, vha, 0xc001,
-			    "Request Que:%d Q0s: %d) created for VP[%d]\n",
-			    ret, qos, vha->vp_idx);
+			    "Queue pair: %d Qos: %d) created for VP[%d]\n",
+			    qpair->id, qos, vha->vp_idx);
 			ql_dbg(ql_dbg_user, vha, 0x7085,
-			    "Request Que:%d Q0s: %d) created for VP[%d]\n",
-			    ret, qos, vha->vp_idx);
-			req = ha->req_q_map[ret];
+			    "Queue Pair: %d Qos: %d) created for VP[%d]\n",
+			    qpair->id, qos, vha->vp_idx);
+			req = qpair->req;
+			vha->qpair = qpair;
 		}
 	}
 
@@ -2162,10 +2156,10 @@ qla24xx_vport_delete(struct fc_vport *fc_vport)
 	clear_bit(vha->vp_idx, ha->vp_idx_map);
 	mutex_unlock(&ha->vport_lock);
 
-	if (vha->req->id && !ha->flags.cpu_affinity_enabled) {
-		if (qla25xx_delete_req_que(vha, vha->req) != QLA_SUCCESS)
+	if (vha->qpair->vp_idx == vha->vp_idx) {
+		if (qla2xxx_delete_qpair(vha, vha->qpair) != QLA_SUCCESS)
 			ql_log(ql_log_warn, vha, 0x7087,
-			    "Queue delete failed.\n");
+			    "Queue Pair delete failed.\n");
 	}
 
 	ql_log(ql_log_info, vha, 0x7088, "VP[%d] deleted.\n", id);

drivers/scsi/qla2xxx/qla_dbg.c

@@ -11,7 +11,7 @@
  * ----------------------------------------------------------------------
  * |             Level            |   Last Value Used  |     Holes	|
  * ----------------------------------------------------------------------
- * | Module Init and Probe        |       0x0191       | 0x0146         |
+ * | Module Init and Probe        |       0x0193       | 0x0146         |
  * |                              |                    | 0x015b-0x0160	|
  * |                              |                    | 0x016e		|
  * | Mailbox commands             |       0x1199       | 0x1193		|
@@ -58,7 +58,7 @@
  * |                              |                    | 0xb13a,0xb142  |
  * |                              |                    | 0xb13c-0xb140  |
  * |                              |                    | 0xb149		|
- * | MultiQ                       |       0xc00c       |		|
+ * | MultiQ                       |       0xc010       |		|
  * | Misc                         |       0xd301       | 0xd031-0xd0ff	|
  * |                              |                    | 0xd101-0xd1fe	|
  * |                              |                    | 0xd214-0xd2fe	|

drivers/scsi/qla2xxx/qla_def.h

@@ -401,6 +401,7 @@ typedef struct srb {
 	uint16_t type;
 	char *name;
 	int iocbs;
+	struct qla_qpair *qpair;
 	union {
 		struct srb_iocb iocb_cmd;
 		struct bsg_job *bsg_job;
@@ -2719,6 +2720,7 @@ struct isp_operations {
 
 	int (*get_flash_version) (struct scsi_qla_host *, void *);
 	int (*start_scsi) (srb_t *);
+	int (*start_scsi_mq) (srb_t *);
 	int (*abort_isp) (struct scsi_qla_host *);
 	int (*iospace_config)(struct qla_hw_data*);
 	int (*initialize_adapter)(struct scsi_qla_host *);
@@ -2730,8 +2732,10 @@ struct isp_operations {
 #define QLA_MSIX_FW_MODE(m)	(((m) & (BIT_7|BIT_8|BIT_9)) >> 7)
 #define QLA_MSIX_FW_MODE_1(m)	(QLA_MSIX_FW_MODE(m) == 1)
 
-#define QLA_MSIX_DEFAULT	0x00
-#define QLA_MSIX_RSP_Q		0x01
+#define QLA_MSIX_DEFAULT		0x00
+#define QLA_MSIX_RSP_Q			0x01
+#define QLA_ATIO_VECTOR		0x02
+#define QLA_MSIX_QPAIR_MULTIQ_RSP_Q	0x03
 
 #define QLA_MIDX_DEFAULT	0
 #define QLA_MIDX_RSP_Q		1
@@ -2745,9 +2749,11 @@ struct scsi_qla_host;
 
 struct qla_msix_entry {
 	int have_irq;
+	int in_use;
 	uint32_t vector;
 	uint16_t entry;
-	struct rsp_que *rsp;
+	char name[30];
+	void *handle;
 	struct irq_affinity_notify irq_notify;
 	int cpuid;
 };
@@ -2872,7 +2878,6 @@ struct rsp_que {
 	struct qla_msix_entry *msix;
 	struct req_que *req;
 	srb_t *status_srb; /* status continuation entry */
-	struct work_struct q_work;
 
 	dma_addr_t  dma_fx00;
 	response_t *ring_fx00;
@@ -2909,6 +2914,37 @@ struct req_que {
 	uint8_t req_pkt[REQUEST_ENTRY_SIZE];
 };
 
+/*Queue pair data structure */
+struct qla_qpair {
+	spinlock_t qp_lock;
+	atomic_t ref_count;
+	/* distill these fields down to 'online=0/1'
+	 * ha->flags.eeh_busy
+	 * ha->flags.pci_channel_io_perm_failure
+	 * base_vha->loop_state
+	 */
+	uint32_t online:1;
+	/* move vha->flags.difdix_supported here */
+	uint32_t difdix_supported:1;
+	uint32_t delete_in_progress:1;
+
+	uint16_t id;			/* qp number used with FW */
+	uint16_t num_active_cmd;	/* cmds down at firmware */
+	cpumask_t cpu_mask; /* CPU mask for cpu affinity operation */
+	uint16_t vp_idx;		/* vport ID */
+
+	mempool_t *srb_mempool;
+
+	/* to do: New driver: move queues to here instead of pointers */
+	struct req_que *req;
+	struct rsp_que *rsp;
+	struct atio_que *atio;
+	struct qla_msix_entry *msix; /* point to &ha->msix_entries[x] */
+	struct qla_hw_data *hw;
+	struct work_struct q_work;
+	struct list_head qp_list_elem; /* vha->qp_list */
+};
+
 /* Place holder for FW buffer parameters */
 struct qlfc_fw {
 	void *fw_buf;
@@ -3004,7 +3040,6 @@ struct qla_hw_data {
 		uint32_t	chip_reset_done		:1;
 		uint32_t	running_gold_fw		:1;
 		uint32_t	eeh_busy		:1;
-		uint32_t	cpu_affinity_enabled	:1;
 		uint32_t	disable_msix_handshake	:1;
 		uint32_t	fcp_prio_enabled	:1;
 		uint32_t	isp82xx_fw_hung:1;
@@ -3061,10 +3096,15 @@ struct qla_hw_data {
 	uint8_t         mqenable;
 	struct req_que **req_q_map;
 	struct rsp_que **rsp_q_map;
+	struct qla_qpair **queue_pair_map;
 	unsigned long req_qid_map[(QLA_MAX_QUEUES / 8) / sizeof(unsigned long)];
 	unsigned long rsp_qid_map[(QLA_MAX_QUEUES / 8) / sizeof(unsigned long)];
+	unsigned long qpair_qid_map[(QLA_MAX_QUEUES / 8)
+		/ sizeof(unsigned long)];
 	uint8_t 	max_req_queues;
 	uint8_t 	max_rsp_queues;
+	uint8_t		max_qpairs;
+	struct qla_qpair *base_qpair;
 	struct qla_npiv_entry *npiv_info;
 	uint16_t	nvram_npiv_size;
 
@@ -3328,6 +3368,7 @@ struct qla_hw_data {
 
 	struct mutex vport_lock;        /* Virtual port synchronization */
 	spinlock_t vport_slock; /* order is hardware_lock, then vport_slock */
+	struct mutex mq_lock;        /* multi-queue synchronization */
 	struct completion mbx_cmd_comp; /* Serialize mbx access */
 	struct completion mbx_intr_comp;  /* Used for completion notification */
 	struct completion dcbx_comp;	/* For set port config notification */
@@ -3608,6 +3649,7 @@ typedef struct scsi_qla_host {
 
 		uint32_t	fw_tgt_reported:1;
 		uint32_t	bbcr_enable:1;
+		uint32_t	qpairs_available:1;
 	} flags;
 
 	atomic_t	loop_state;
@@ -3646,6 +3688,7 @@ typedef struct scsi_qla_host {
 #define FX00_TARGET_SCAN	24
 #define FX00_CRITEMP_RECOVERY	25
 #define FX00_HOST_INFO_RESEND	26
+#define QPAIR_ONLINE_CHECK_NEEDED	27
 
 	unsigned long	pci_flags;
 #define PFLG_DISCONNECTED	0	/* PCI device removed */
@@ -3704,10 +3747,13 @@ typedef struct scsi_qla_host {
 	/* List of pending PLOGI acks, protected by hw lock */
 	struct list_head	plogi_ack_list;
 
+	struct list_head	qp_list;
+
 	uint32_t	vp_abort_cnt;
 
 	struct fc_vport	*fc_vport;	/* holds fc_vport * for each vport */
 	uint16_t        vp_idx;		/* vport ID */
+	struct qla_qpair *qpair;	/* base qpair */
 
 	unsigned long		vp_flags;
 #define VP_IDX_ACQUIRED		0	/* bit no 0 */
@@ -3763,6 +3809,23 @@ struct qla_tgt_vp_map {
 	scsi_qla_host_t *vha;
 };
 
+struct qla2_sgx {
+	dma_addr_t		dma_addr;	/* OUT */
+	uint32_t		dma_len;	/* OUT */
+
+	uint32_t		tot_bytes;	/* IN */
+	struct scatterlist	*cur_sg;	/* IN */
+
+	/* for book keeping, bzero on initial invocation */
+	uint32_t		bytes_consumed;
+	uint32_t		num_bytes;
+	uint32_t		tot_partial;
+
+	/* for debugging */
+	uint32_t		num_sg;
+	srb_t			*sp;
+};
+
 /*
  * Macros to help code, maintain, etc.
  */
@@ -3775,21 +3838,34 @@ struct qla_tgt_vp_map {
 		(test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) || \
 			 test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
 
-#define QLA_VHA_MARK_BUSY(__vha, __bail) do {		     \
-	atomic_inc(&__vha->vref_count);			     \
-	mb();						     \
-	if (__vha->flags.delete_progress) {		     \
-		atomic_dec(&__vha->vref_count);		     \
-		__bail = 1;				     \
-	} else {					     \
-		__bail = 0;				     \
-	}						     \
+#define QLA_VHA_MARK_BUSY(__vha, __bail) do {		\
+	atomic_inc(&__vha->vref_count);			\
+	mb();						\
+	if (__vha->flags.delete_progress) {		\
+		atomic_dec(&__vha->vref_count);		\
+		__bail = 1;				\
+	} else {					\
+		__bail = 0;				\
+	}						\
 } while (0)
 
-#define QLA_VHA_MARK_NOT_BUSY(__vha) do {		     \
-	atomic_dec(&__vha->vref_count);			     \
+#define QLA_VHA_MARK_NOT_BUSY(__vha)			\
+	atomic_dec(&__vha->vref_count);			\
+
+#define QLA_QPAIR_MARK_BUSY(__qpair, __bail) do {	\
+	atomic_inc(&__qpair->ref_count);		\
+	mb();						\
+	if (__qpair->delete_in_progress) {		\
+		atomic_dec(&__qpair->ref_count);	\
+		__bail = 1;				\
+	} else {					\
+	       __bail = 0;				\
+	}						\
 } while (0)
 
+#define QLA_QPAIR_MARK_NOT_BUSY(__qpair)		\
+	atomic_dec(&__qpair->ref_count);		\
+
 /*
  * qla2x00 local function return status codes
  */

drivers/scsi/qla2xxx/qla_gbl.h

@@ -91,12 +91,17 @@ extern int
 qla2x00_alloc_outstanding_cmds(struct qla_hw_data *, struct req_que *);
 extern int qla2x00_init_rings(scsi_qla_host_t *);
 extern uint8_t qla27xx_find_valid_image(struct scsi_qla_host *);
+extern struct qla_qpair *qla2xxx_create_qpair(struct scsi_qla_host *,
+	int, int);
+extern int qla2xxx_delete_qpair(struct scsi_qla_host *, struct qla_qpair *);
 
 /*
  * Global Data in qla_os.c source file.
  */
 extern char qla2x00_version_str[];
 
+extern struct kmem_cache *srb_cachep;
+
 extern int ql2xlogintimeout;
 extern int qlport_down_retry;
 extern int ql2xplogiabsentdevice;
@@ -105,8 +110,7 @@ extern int ql2xfdmienable;
 extern int ql2xallocfwdump;
 extern int ql2xextended_error_logging;
 extern int ql2xiidmaenable;
-extern int ql2xmaxqueues;
-extern int ql2xmultique_tag;
+extern int ql2xmqsupport;
 extern int ql2xfwloadbin;
 extern int ql2xetsenable;
 extern int ql2xshiftctondsd;
@@ -172,6 +176,9 @@ extern int qla2x00_post_uevent_work(struct scsi_qla_host *, u32);
 
 extern int qla2x00_post_uevent_work(struct scsi_qla_host *, u32);
 extern void qla2x00_disable_board_on_pci_error(struct work_struct *);
+extern void qla2x00_sp_compl(void *, void *, int);
+extern void qla2xxx_qpair_sp_free_dma(void *, void *);
+extern void qla2xxx_qpair_sp_compl(void *, void *, int);
 
 /*
  * Global Functions in qla_mid.c source file.
@@ -220,6 +227,8 @@ extern uint16_t qla2x00_calc_iocbs_32(uint16_t);
 extern uint16_t qla2x00_calc_iocbs_64(uint16_t);
 extern void qla2x00_build_scsi_iocbs_32(srb_t *, cmd_entry_t *, uint16_t);
 extern void qla2x00_build_scsi_iocbs_64(srb_t *, cmd_entry_t *, uint16_t);
+extern void qla24xx_build_scsi_iocbs(srb_t *, struct cmd_type_7 *,
+	uint16_t, struct req_que *);
 extern int qla2x00_start_scsi(srb_t *sp);
 extern int qla24xx_start_scsi(srb_t *sp);
 int qla2x00_marker(struct scsi_qla_host *, struct req_que *, struct rsp_que *,
@@ -227,6 +236,7 @@ int qla2x00_marker(struct scsi_qla_host *, struct req_que *, struct rsp_que *,
 extern int qla2x00_start_sp(srb_t *);
 extern int qla24xx_dif_start_scsi(srb_t *);
 extern int qla2x00_start_bidir(srb_t *, struct scsi_qla_host *, uint32_t);
+extern int qla2xxx_dif_start_scsi_mq(srb_t *);
 extern unsigned long qla2x00_get_async_timeout(struct scsi_qla_host *);
 
 extern void *qla2x00_alloc_iocbs(scsi_qla_host_t *, srb_t *);
@@ -237,7 +247,10 @@ extern int qla24xx_walk_and_build_sglist(struct qla_hw_data *, srb_t *,
 	uint32_t *, uint16_t, struct qla_tgt_cmd *);
 extern int qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *, srb_t *,
 	uint32_t *, uint16_t, struct qla_tgt_cmd *);
-
+extern int qla24xx_get_one_block_sg(uint32_t, struct qla2_sgx *, uint32_t *);
+extern int qla24xx_configure_prot_mode(srb_t *, uint16_t *);
+extern int qla24xx_build_scsi_crc_2_iocbs(srb_t *,
+	struct cmd_type_crc_2 *, uint16_t, uint16_t, uint16_t);
 
 /*
  * Global Function Prototypes in qla_mbx.c source file.
@@ -468,6 +481,8 @@ qla2x00_get_sp_from_handle(scsi_qla_host_t *, const char *, struct req_que *,
 extern void
 qla2x00_process_completed_request(struct scsi_qla_host *, struct req_que *,
 	uint32_t);
+extern irqreturn_t
+qla2xxx_msix_rsp_q(int irq, void *dev_id);
 
 /*
  * Global Function Prototypes in qla_sup.c source file.
@@ -603,15 +618,18 @@ extern int qla2x00_dfs_setup(scsi_qla_host_t *);
 extern int qla2x00_dfs_remove(scsi_qla_host_t *);
 
 /* Globa function prototypes for multi-q */
-extern int qla25xx_request_irq(struct rsp_que *);
+extern int qla25xx_request_irq(struct qla_hw_data *, struct qla_qpair *,
+	struct qla_msix_entry *, int);
 extern int qla25xx_init_req_que(struct scsi_qla_host *, struct req_que *);
 extern int qla25xx_init_rsp_que(struct scsi_qla_host *, struct rsp_que *);
 extern int qla25xx_create_req_que(struct qla_hw_data *, uint16_t, uint8_t,
 	uint16_t, int, uint8_t);
 extern int qla25xx_create_rsp_que(struct qla_hw_data *, uint16_t, uint8_t,
-	uint16_t, int);
+	uint16_t, struct qla_qpair *);
+
 extern void qla2x00_init_response_q_entries(struct rsp_que *);
 extern int qla25xx_delete_req_que(struct scsi_qla_host *, struct req_que *);
+extern int qla25xx_delete_rsp_que(struct scsi_qla_host *, struct rsp_que *);
 extern int qla25xx_delete_queues(struct scsi_qla_host *);
 extern uint16_t qla24xx_rd_req_reg(struct qla_hw_data *, uint16_t);
 extern uint16_t qla25xx_rd_req_reg(struct qla_hw_data *, uint16_t);

drivers/scsi/qla2xxx/qla_init.c

@@ -1769,8 +1769,7 @@ qla2x00_alloc_outstanding_cmds(struct qla_hw_data *ha, struct req_que *req)
 	if (req->outstanding_cmds)
 		return QLA_SUCCESS;
 
-	if (!IS_FWI2_CAPABLE(ha) || (ha->mqiobase &&
-	    (ql2xmultique_tag || ql2xmaxqueues > 1)))
+	if (!IS_FWI2_CAPABLE(ha))
 		req->num_outstanding_cmds = DEFAULT_OUTSTANDING_COMMANDS;
 	else {
 		if (ha->cur_fw_xcb_count <= ha->cur_fw_iocb_count)
@@ -4248,10 +4247,7 @@ qla2x00_loop_resync(scsi_qla_host_t *vha)
 	struct req_que *req;
 	struct rsp_que *rsp;
 
-	if (vha->hw->flags.cpu_affinity_enabled)
-		req = vha->hw->req_q_map[0];
-	else
-		req = vha->req;
+	req = vha->req;
 	rsp = req->rsp;
 
 	clear_bit(ISP_ABORT_RETRY, &vha->dpc_flags);
@@ -6040,10 +6036,10 @@ qla24xx_configure_vhba(scsi_qla_host_t *vha)
 		return -EINVAL;
 
 	rval = qla2x00_fw_ready(base_vha);
-	if (ha->flags.cpu_affinity_enabled)
-		req = ha->req_q_map[0];
+	if (vha->qpair)
+		req = vha->qpair->req;
 	else
-		req = vha->req;
+		req = ha->req_q_map[0];
 	rsp = req->rsp;
 
 	if (rval == QLA_SUCCESS) {
@@ -6725,3 +6721,162 @@ qla24xx_update_all_fcp_prio(scsi_qla_host_t *vha)
 
 	return ret;
 }
+
+struct qla_qpair *qla2xxx_create_qpair(struct scsi_qla_host *vha, int qos, int vp_idx)
+{
+	int rsp_id = 0;
+	int  req_id = 0;
+	int i;
+	struct qla_hw_data *ha = vha->hw;
+	uint16_t qpair_id = 0;
+	struct qla_qpair *qpair = NULL;
+	struct qla_msix_entry *msix;
+
+	if (!(ha->fw_attributes & BIT_6) || !ha->flags.msix_enabled) {
+		ql_log(ql_log_warn, vha, 0x00181,
+		    "FW/Driver is not multi-queue capable.\n");
+		return NULL;
+	}
+
+	if (ql2xmqsupport) {
+		qpair = kzalloc(sizeof(struct qla_qpair), GFP_KERNEL);
+		if (qpair == NULL) {
+			ql_log(ql_log_warn, vha, 0x0182,
+			    "Failed to allocate memory for queue pair.\n");
+			return NULL;
+		}
+		memset(qpair, 0, sizeof(struct qla_qpair));
+
+		qpair->hw = vha->hw;
+
+		/* Assign available que pair id */
+		mutex_lock(&ha->mq_lock);
+		qpair_id = find_first_zero_bit(ha->qpair_qid_map, ha->max_qpairs);
+		if (qpair_id >= ha->max_qpairs) {
+			mutex_unlock(&ha->mq_lock);
+			ql_log(ql_log_warn, vha, 0x0183,
+			    "No resources to create additional q pair.\n");
+			goto fail_qid_map;
+		}
+		set_bit(qpair_id, ha->qpair_qid_map);
+		ha->queue_pair_map[qpair_id] = qpair;
+		qpair->id = qpair_id;
+		qpair->vp_idx = vp_idx;
+
+		for (i = 0; i < ha->msix_count; i++) {
+			msix = &ha->msix_entries[i];
+			if (msix->in_use)
+				continue;
+			qpair->msix = msix;
+			ql_log(ql_dbg_multiq, vha, 0xc00f,
+			    "Vector %x selected for qpair\n", msix->vector);
+			break;
+		}
+		if (!qpair->msix) {
+			ql_log(ql_log_warn, vha, 0x0184,
+			    "Out of MSI-X vectors!.\n");
+			goto fail_msix;
+		}
+
+		qpair->msix->in_use = 1;
+		list_add_tail(&qpair->qp_list_elem, &vha->qp_list);
+
+		mutex_unlock(&ha->mq_lock);
+
+		/* Create response queue first */
+		rsp_id = qla25xx_create_rsp_que(ha, 0, 0, 0, qpair);
+		if (!rsp_id) {
+			ql_log(ql_log_warn, vha, 0x0185,
+			    "Failed to create response queue.\n");
+			goto fail_rsp;
+		}
+
+		qpair->rsp = ha->rsp_q_map[rsp_id];
+
+		/* Create request queue */
+		req_id = qla25xx_create_req_que(ha, 0, vp_idx, 0, rsp_id, qos);
+		if (!req_id) {
+			ql_log(ql_log_warn, vha, 0x0186,
+			    "Failed to create request queue.\n");
+			goto fail_req;
+		}
+
+		qpair->req = ha->req_q_map[req_id];
+		qpair->rsp->req = qpair->req;
+
+		if (IS_T10_PI_CAPABLE(ha) && ql2xenabledif) {
+			if (ha->fw_attributes & BIT_4)
+				qpair->difdix_supported = 1;
+		}
+
+		qpair->srb_mempool = mempool_create_slab_pool(SRB_MIN_REQ, srb_cachep);
+		if (!qpair->srb_mempool) {
+			ql_log(ql_log_warn, vha, 0x0191,
+			    "Failed to create srb mempool for qpair %d\n",
+			    qpair->id);
+			goto fail_mempool;
+		}
+
+		/* Mark as online */
+		qpair->online = 1;
+
+		if (!vha->flags.qpairs_available)
+			vha->flags.qpairs_available = 1;
+
+		ql_dbg(ql_dbg_multiq, vha, 0xc00d,
+		    "Request/Response queue pair created, id %d\n",
+		    qpair->id);
+		ql_dbg(ql_dbg_init, vha, 0x0187,
+		    "Request/Response queue pair created, id %d\n",
+		    qpair->id);
+	}
+	return qpair;
+
+fail_mempool:
+fail_req:
+	qla25xx_delete_rsp_que(vha, qpair->rsp);
+fail_rsp:
+	mutex_lock(&ha->mq_lock);
+	qpair->msix->in_use = 0;
+	list_del(&qpair->qp_list_elem);
+	if (list_empty(&vha->qp_list))
+		vha->flags.qpairs_available = 0;
+fail_msix:
+	ha->queue_pair_map[qpair_id] = NULL;
+	clear_bit(qpair_id, ha->qpair_qid_map);
+	mutex_unlock(&ha->mq_lock);
+fail_qid_map:
+	kfree(qpair);
+	return NULL;
+}
+
+int qla2xxx_delete_qpair(struct scsi_qla_host *vha, struct qla_qpair *qpair)
+{
+	int ret;
+	struct qla_hw_data *ha = qpair->hw;
+
+	qpair->delete_in_progress = 1;
+	while (atomic_read(&qpair->ref_count))
+		msleep(500);
+
+	ret = qla25xx_delete_req_que(vha, qpair->req);
+	if (ret != QLA_SUCCESS)
+		goto fail;
+	ret = qla25xx_delete_rsp_que(vha, qpair->rsp);
+	if (ret != QLA_SUCCESS)
+		goto fail;
+
+	mutex_lock(&ha->mq_lock);
+	ha->queue_pair_map[qpair->id] = NULL;
+	clear_bit(qpair->id, ha->qpair_qid_map);
+	list_del(&qpair->qp_list_elem);
+	if (list_empty(&vha->qp_list))
+		vha->flags.qpairs_available = 0;
+	mempool_destroy(qpair->srb_mempool);
+	kfree(qpair);
+	mutex_unlock(&ha->mq_lock);
+
+	return QLA_SUCCESS;
+fail:
+	return ret;
+}

drivers/scsi/qla2xxx/qla_inline.h

@@ -215,6 +215,36 @@ qla2x00_reset_active(scsi_qla_host_t *vha)
 	    test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags);
 }
 
+static inline srb_t *
+qla2xxx_get_qpair_sp(struct qla_qpair *qpair, fc_port_t *fcport, gfp_t flag)
+{
+	srb_t *sp = NULL;
+	uint8_t bail;
+
+	QLA_QPAIR_MARK_BUSY(qpair, bail);
+	if (unlikely(bail))
+		return NULL;
+
+	sp = mempool_alloc(qpair->srb_mempool, flag);
+	if (!sp)
+		goto done;
+
+	memset(sp, 0, sizeof(*sp));
+	sp->fcport = fcport;
+	sp->iocbs = 1;
+done:
+	if (!sp)
+		QLA_QPAIR_MARK_NOT_BUSY(qpair);
+	return sp;
+}
+
+static inline void
+qla2xxx_rel_qpair_sp(struct qla_qpair *qpair, srb_t *sp)
+{
+	mempool_free(sp, qpair->srb_mempool);
+	QLA_QPAIR_MARK_NOT_BUSY(qpair);
+}
+
 static inline srb_t *
 qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
 {

drivers/scsi/qla2xxx/qla_iocb.c

@@ -12,7 +12,6 @@
 
 #include <scsi/scsi_tcq.h>
 
-static void qla25xx_set_que(srb_t *, struct rsp_que **);
 /**
  * qla2x00_get_cmd_direction() - Determine control_flag data direction.
  * @cmd: SCSI command
@@ -143,7 +142,7 @@ qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *vha, struct req_que *req)
 	return (cont_pkt);
 }
 
-static inline int
+inline int
 qla24xx_configure_prot_mode(srb_t *sp, uint16_t *fw_prot_opts)
 {
 	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
@@ -693,10 +692,11 @@ qla24xx_calc_dsd_lists(uint16_t dsds)
  * @sp: SRB command to process
  * @cmd_pkt: Command type 3 IOCB
  * @tot_dsds: Total number of segments to transfer
+ * @req: pointer to request queue
  */
-static inline void
+inline void
 qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
-    uint16_t tot_dsds)
+	uint16_t tot_dsds, struct req_que *req)
 {
 	uint16_t	avail_dsds;
 	uint32_t	*cur_dsd;
@@ -745,7 +745,7 @@ qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,
 			 * Five DSDs are available in the Continuation
 			 * Type 1 IOCB.
 			 */
-			cont_pkt = qla2x00_prep_cont_type1_iocb(vha, vha->req);
+			cont_pkt = qla2x00_prep_cont_type1_iocb(vha, req);
 			cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
 			avail_dsds = 5;
 		}
@@ -845,24 +845,7 @@ qla24xx_set_t10dif_tags(srb_t *sp, struct fw_dif_context *pkt,
 	}
 }
 
-struct qla2_sgx {
-	dma_addr_t		dma_addr;	/* OUT */
-	uint32_t		dma_len;	/* OUT */
-
-	uint32_t		tot_bytes;	/* IN */
-	struct scatterlist	*cur_sg;	/* IN */
-
-	/* for book keeping, bzero on initial invocation */
-	uint32_t		bytes_consumed;
-	uint32_t		num_bytes;
-	uint32_t		tot_partial;
-
-	/* for debugging */
-	uint32_t		num_sg;
-	srb_t			*sp;
-};
-
-static int
+int
 qla24xx_get_one_block_sg(uint32_t blk_sz, struct qla2_sgx *sgx,
 	uint32_t *partial)
 {
@@ -1207,7 +1190,7 @@ qla24xx_walk_and_build_prot_sglist(struct qla_hw_data *ha, srb_t *sp,
  * @cmd_pkt: Command type 3 IOCB
  * @tot_dsds: Total number of segments to transfer
  */
-static inline int
+inline int
 qla24xx_build_scsi_crc_2_iocbs(srb_t *sp, struct cmd_type_crc_2 *cmd_pkt,
     uint16_t tot_dsds, uint16_t tot_prot_dsds, uint16_t fw_prot_opts)
 {
@@ -1436,8 +1419,8 @@ qla24xx_start_scsi(srb_t *sp)
 	struct qla_hw_data *ha = vha->hw;
 
 	/* Setup device pointers. */
-	qla25xx_set_que(sp, &rsp);
 	req = vha->req;
+	rsp = req->rsp;
 
 	/* So we know we haven't pci_map'ed anything yet */
 	tot_dsds = 0;
@@ -1523,12 +1506,10 @@ qla24xx_start_scsi(srb_t *sp)
 	cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 
 	/* Build IOCB segments */
-	qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds);
+	qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
 
 	/* Set total data segment count. */
 	cmd_pkt->entry_count = (uint8_t)req_cnt;
-	/* Specify response queue number where completion should happen */
-	cmd_pkt->entry_status = (uint8_t) rsp->id;
 	wmb();
 	/* Adjust ring index. */
 	req->ring_index++;
@@ -1597,9 +1578,8 @@ qla24xx_dif_start_scsi(srb_t *sp)
 	}
 
 	/* Setup device pointers. */
-
-	qla25xx_set_que(sp, &rsp);
 	req = vha->req;
+	rsp = req->rsp;
 
 	/* So we know we haven't pci_map'ed anything yet */
 	tot_dsds = 0;
@@ -1764,18 +1744,365 @@ queuing_error:
 	return QLA_FUNCTION_FAILED;
 }
 
-
-static void qla25xx_set_que(srb_t *sp, struct rsp_que **rsp)
+/**
+ * qla2xxx_start_scsi_mq() - Send a SCSI command to the ISP
+ * @sp: command to send to the ISP
+ *
+ * Returns non-zero if a failure occurred, else zero.
+ */
+static int
+qla2xxx_start_scsi_mq(srb_t *sp)
 {
+	int		nseg;
+	unsigned long   flags;
+	uint32_t	*clr_ptr;
+	uint32_t        index;
+	uint32_t	handle;
+	struct cmd_type_7 *cmd_pkt;
+	uint16_t	cnt;
+	uint16_t	req_cnt;
+	uint16_t	tot_dsds;
+	struct req_que *req = NULL;
+	struct rsp_que *rsp = NULL;
 	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
-	struct qla_hw_data *ha = sp->fcport->vha->hw;
-	int affinity = cmd->request->cpu;
+	struct scsi_qla_host *vha = sp->fcport->vha;
+	struct qla_hw_data *ha = vha->hw;
+	struct qla_qpair *qpair = sp->qpair;
+
+	/* Setup qpair pointers */
+	rsp = qpair->rsp;
+	req = qpair->req;
+
+	/* So we know we haven't pci_map'ed anything yet */
+	tot_dsds = 0;
+
+	/* Send marker if required */
+	if (vha->marker_needed != 0) {
+		if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
+		    QLA_SUCCESS)
+			return QLA_FUNCTION_FAILED;
+		vha->marker_needed = 0;
+	}
+
+	/* Acquire qpair specific lock */
+	spin_lock_irqsave(&qpair->qp_lock, flags);
+
+	/* Check for room in outstanding command list. */
+	handle = req->current_outstanding_cmd;
+	for (index = 1; index < req->num_outstanding_cmds; index++) {
+		handle++;
+		if (handle == req->num_outstanding_cmds)
+			handle = 1;
+		if (!req->outstanding_cmds[handle])
+			break;
+	}
+	if (index == req->num_outstanding_cmds)
+		goto queuing_error;
+
+	/* Map the sg table so we have an accurate count of sg entries needed */
+	if (scsi_sg_count(cmd)) {
+		nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
+		    scsi_sg_count(cmd), cmd->sc_data_direction);
+		if (unlikely(!nseg))
+			goto queuing_error;
+	} else
+		nseg = 0;
+
+	tot_dsds = nseg;
+	req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
+	if (req->cnt < (req_cnt + 2)) {
+		cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
+		    RD_REG_DWORD_RELAXED(req->req_q_out);
+		if (req->ring_index < cnt)
+			req->cnt = cnt - req->ring_index;
+		else
+			req->cnt = req->length -
+				(req->ring_index - cnt);
+		if (req->cnt < (req_cnt + 2))
+			goto queuing_error;
+	}
+
+	/* Build command packet. */
+	req->current_outstanding_cmd = handle;
+	req->outstanding_cmds[handle] = sp;
+	sp->handle = handle;
+	cmd->host_scribble = (unsigned char *)(unsigned long)handle;
+	req->cnt -= req_cnt;
+
+	cmd_pkt = (struct cmd_type_7 *)req->ring_ptr;
+	cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
+
+	/* Zero out remaining portion of packet. */
+	/*    tagged queuing modifier -- default is TSK_SIMPLE (0). */
+	clr_ptr = (uint32_t *)cmd_pkt + 2;
+	memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
+	cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
+
+	/* Set NPORT-ID and LUN number*/
+	cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
+	cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
+	cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
+	cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
+	cmd_pkt->vp_index = sp->fcport->vha->vp_idx;
+
+	int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
+	host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
+
+	cmd_pkt->task = TSK_SIMPLE;
+
+	/* Load SCSI command packet. */
+	memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);
+	host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));
+
+	cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
+
+	/* Build IOCB segments */
+	qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
+
+	/* Set total data segment count. */
+	cmd_pkt->entry_count = (uint8_t)req_cnt;
+	wmb();
+	/* Adjust ring index. */
+	req->ring_index++;
+	if (req->ring_index == req->length) {
+		req->ring_index = 0;
+		req->ring_ptr = req->ring;
+	} else
+		req->ring_ptr++;
+
+	sp->flags |= SRB_DMA_VALID;
+
+	/* Set chip new ring index. */
+	WRT_REG_DWORD(req->req_q_in, req->ring_index);
+
+	/* Manage unprocessed RIO/ZIO commands in response queue. */
+	if (vha->flags.process_response_queue &&
+		rsp->ring_ptr->signature != RESPONSE_PROCESSED)
+		qla24xx_process_response_queue(vha, rsp);
+
+	spin_unlock_irqrestore(&qpair->qp_lock, flags);
+	return QLA_SUCCESS;
+
+queuing_error:
+	if (tot_dsds)
+		scsi_dma_unmap(cmd);
+
+	spin_unlock_irqrestore(&qpair->qp_lock, flags);
+
+	return QLA_FUNCTION_FAILED;
+}
+
+
+/**
+ * qla2xxx_dif_start_scsi_mq() - Send a SCSI command to the ISP
+ * @sp: command to send to the ISP
+ *
+ * Returns non-zero if a failure occurred, else zero.
+ */
+int
+qla2xxx_dif_start_scsi_mq(srb_t *sp)
+{
+	int			nseg;
+	unsigned long		flags;
+	uint32_t		*clr_ptr;
+	uint32_t		index;
+	uint32_t		handle;
+	uint16_t		cnt;
+	uint16_t		req_cnt = 0;
+	uint16_t		tot_dsds;
+	uint16_t		tot_prot_dsds;
+	uint16_t		fw_prot_opts = 0;
+	struct req_que		*req = NULL;
+	struct rsp_que		*rsp = NULL;
+	struct scsi_cmnd	*cmd = GET_CMD_SP(sp);
+	struct scsi_qla_host	*vha = sp->fcport->vha;
+	struct qla_hw_data	*ha = vha->hw;
+	struct cmd_type_crc_2	*cmd_pkt;
+	uint32_t		status = 0;
+	struct qla_qpair	*qpair = sp->qpair;
+
+#define QDSS_GOT_Q_SPACE	BIT_0
+
+	/* Check for host side state */
+	if (!qpair->online) {
+		cmd->result = DID_NO_CONNECT << 16;
+		return QLA_INTERFACE_ERROR;
+	}
+
+	if (!qpair->difdix_supported &&
+		scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
+		cmd->result = DID_NO_CONNECT << 16;
+		return QLA_INTERFACE_ERROR;
+	}
+
+	/* Only process protection or >16 cdb in this routine */
+	if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
+		if (cmd->cmd_len <= 16)
+			return qla2xxx_start_scsi_mq(sp);
+	}
+
+	/* Setup qpair pointers */
+	rsp = qpair->rsp;
+	req = qpair->req;
+
+	/* So we know we haven't pci_map'ed anything yet */
+	tot_dsds = 0;
+
+	/* Send marker if required */
+	if (vha->marker_needed != 0) {
+		if (qla2x00_marker(vha, req, rsp, 0, 0, MK_SYNC_ALL) !=
+		    QLA_SUCCESS)
+			return QLA_FUNCTION_FAILED;
+		vha->marker_needed = 0;
+	}
+
+	/* Acquire ring specific lock */
+	spin_lock_irqsave(&qpair->qp_lock, flags);
+
+	/* Check for room in outstanding command list. */
+	handle = req->current_outstanding_cmd;
+	for (index = 1; index < req->num_outstanding_cmds; index++) {
+		handle++;
+		if (handle == req->num_outstanding_cmds)
+			handle = 1;
+		if (!req->outstanding_cmds[handle])
+			break;
+	}
+
+	if (index == req->num_outstanding_cmds)
+		goto queuing_error;
+
+	/* Compute number of required data segments */
+	/* Map the sg table so we have an accurate count of sg entries needed */
+	if (scsi_sg_count(cmd)) {
+		nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
+		    scsi_sg_count(cmd), cmd->sc_data_direction);
+		if (unlikely(!nseg))
+			goto queuing_error;
+		else
+			sp->flags |= SRB_DMA_VALID;
+
+		if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
+		    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
+			struct qla2_sgx sgx;
+			uint32_t	partial;
+
+			memset(&sgx, 0, sizeof(struct qla2_sgx));
+			sgx.tot_bytes = scsi_bufflen(cmd);
+			sgx.cur_sg = scsi_sglist(cmd);
+			sgx.sp = sp;
+
+			nseg = 0;
+			while (qla24xx_get_one_block_sg(
+			    cmd->device->sector_size, &sgx, &partial))
+				nseg++;
+		}
+	} else
+		nseg = 0;
+
+	/* number of required data segments */
+	tot_dsds = nseg;
+
+	/* Compute number of required protection segments */
+	if (qla24xx_configure_prot_mode(sp, &fw_prot_opts)) {
+		nseg = dma_map_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
+		    scsi_prot_sg_count(cmd), cmd->sc_data_direction);
+		if (unlikely(!nseg))
+			goto queuing_error;
+		else
+			sp->flags |= SRB_CRC_PROT_DMA_VALID;
+
+		if ((scsi_get_prot_op(cmd) == SCSI_PROT_READ_INSERT) ||
+		    (scsi_get_prot_op(cmd) == SCSI_PROT_WRITE_STRIP)) {
+			nseg = scsi_bufflen(cmd) / cmd->device->sector_size;
+		}
+	} else {
+		nseg = 0;
+	}
+
+	req_cnt = 1;
+	/* Total Data and protection sg segment(s) */
+	tot_prot_dsds = nseg;
+	tot_dsds += nseg;
+	if (req->cnt < (req_cnt + 2)) {
+		cnt = IS_SHADOW_REG_CAPABLE(ha) ? *req->out_ptr :
+		    RD_REG_DWORD_RELAXED(req->req_q_out);
+		if (req->ring_index < cnt)
+			req->cnt = cnt - req->ring_index;
+		else
+			req->cnt = req->length -
+				(req->ring_index - cnt);
+		if (req->cnt < (req_cnt + 2))
+			goto queuing_error;
+	}
+
+	status |= QDSS_GOT_Q_SPACE;
+
+	/* Build header part of command packet (excluding the OPCODE). */
+	req->current_outstanding_cmd = handle;
+	req->outstanding_cmds[handle] = sp;
+	sp->handle = handle;
+	cmd->host_scribble = (unsigned char *)(unsigned long)handle;
+	req->cnt -= req_cnt;
+
+	/* Fill-in common area */
+	cmd_pkt = (struct cmd_type_crc_2 *)req->ring_ptr;
+	cmd_pkt->handle = MAKE_HANDLE(req->id, handle);
+
+	clr_ptr = (uint32_t *)cmd_pkt + 2;
+	memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
+
+	/* Set NPORT-ID and LUN number*/
+	cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
+	cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
+	cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
+	cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
 
-	if (ha->flags.cpu_affinity_enabled && affinity >= 0 &&
-		affinity < ha->max_rsp_queues - 1)
-		*rsp = ha->rsp_q_map[affinity + 1];
-	 else
-		*rsp = ha->rsp_q_map[0];
+	int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
+	host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
+
+	/* Total Data and protection segment(s) */
+	cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
+
+	/* Build IOCB segments and adjust for data protection segments */
+	if (qla24xx_build_scsi_crc_2_iocbs(sp, (struct cmd_type_crc_2 *)
+	    req->ring_ptr, tot_dsds, tot_prot_dsds, fw_prot_opts) !=
+		QLA_SUCCESS)
+		goto queuing_error;
+
+	cmd_pkt->entry_count = (uint8_t)req_cnt;
+	cmd_pkt->timeout = cpu_to_le16(0);
+	wmb();
+
+	/* Adjust ring index. */
+	req->ring_index++;
+	if (req->ring_index == req->length) {
+		req->ring_index = 0;
+		req->ring_ptr = req->ring;
+	} else
+		req->ring_ptr++;
+
+	/* Set chip new ring index. */
+	WRT_REG_DWORD(req->req_q_in, req->ring_index);
+
+	/* Manage unprocessed RIO/ZIO commands in response queue. */
+	if (vha->flags.process_response_queue &&
+	    rsp->ring_ptr->signature != RESPONSE_PROCESSED)
+		qla24xx_process_response_queue(vha, rsp);
+
+	spin_unlock_irqrestore(&qpair->qp_lock, flags);
+
+	return QLA_SUCCESS;
+
+queuing_error:
+	if (status & QDSS_GOT_Q_SPACE) {
+		req->outstanding_cmds[handle] = NULL;
+		req->cnt += req_cnt;
+	}
+	/* Cleanup will be performed by the caller (queuecommand) */
+
+	spin_unlock_irqrestore(&qpair->qp_lock, flags);
+	return QLA_FUNCTION_FAILED;
 }
 
 /* Generic Control-SRB manipulation functions. */
@@ -2664,7 +2991,7 @@ sufficient_dsds:
 		cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
 
 		/* Build IOCB segments */
-		qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds);
+		qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds, req);
 
 		/* Set total data segment count. */
 		cmd_pkt->entry_count = (uint8_t)req_cnt;

drivers/scsi/qla2xxx/qla_isr.c

@@ -2871,41 +2871,6 @@ out:
 	return IRQ_HANDLED;
 }
 
-static irqreturn_t
-qla25xx_msix_rsp_q(int irq, void *dev_id)
-{
-	struct qla_hw_data *ha;
-	scsi_qla_host_t *vha;
-	struct rsp_que *rsp;
-	struct device_reg_24xx __iomem *reg;
-	unsigned long flags;
-	uint32_t hccr = 0;
-
-	rsp = (struct rsp_que *) dev_id;
-	if (!rsp) {
-		ql_log(ql_log_info, NULL, 0x505b,
-		    "%s: NULL response queue pointer.\n", __func__);
-		return IRQ_NONE;
-	}
-	ha = rsp->hw;
-	vha = pci_get_drvdata(ha->pdev);
-
-	/* Clear the interrupt, if enabled, for this response queue */
-	if (!ha->flags.disable_msix_handshake) {
-		reg = &ha->iobase->isp24;
-		spin_lock_irqsave(&ha->hardware_lock, flags);
-		WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
-		hccr = RD_REG_DWORD_RELAXED(&reg->hccr);
-		spin_unlock_irqrestore(&ha->hardware_lock, flags);
-	}
-	if (qla2x00_check_reg32_for_disconnect(vha, hccr))
-		goto out;
-	queue_work_on((int) (rsp->id - 1), ha->wq, &rsp->q_work);
-
-out:
-	return IRQ_HANDLED;
-}
-
 static irqreturn_t
 qla24xx_msix_default(int irq, void *dev_id)
 {
@@ -3002,6 +2967,35 @@ qla24xx_msix_default(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+irqreturn_t
+qla2xxx_msix_rsp_q(int irq, void *dev_id)
+{
+	struct qla_hw_data *ha;
+	struct qla_qpair *qpair;
+	struct device_reg_24xx __iomem *reg;
+	unsigned long flags;
+
+	qpair = dev_id;
+	if (!qpair) {
+		ql_log(ql_log_info, NULL, 0x505b,
+		    "%s: NULL response queue pointer.\n", __func__);
+		return IRQ_NONE;
+	}
+	ha = qpair->hw;
+
+	/* Clear the interrupt, if enabled, for this response queue */
+	if (unlikely(!ha->flags.disable_msix_handshake)) {
+		reg = &ha->iobase->isp24;
+		spin_lock_irqsave(&ha->hardware_lock, flags);
+		WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
+	}
+
+	queue_work(ha->wq, &qpair->q_work);
+
+	return IRQ_HANDLED;
+}
+
 /* Interrupt handling helpers. */
 
 struct qla_init_msix_entry {
@@ -3009,69 +3003,28 @@ struct qla_init_msix_entry {
 	irq_handler_t handler;
 };
 
-static struct qla_init_msix_entry msix_entries[3] = {
+static struct qla_init_msix_entry msix_entries[] = {
 	{ "qla2xxx (default)", qla24xx_msix_default },
 	{ "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
-	{ "qla2xxx (multiq)", qla25xx_msix_rsp_q },
+	{ "qla2xxx (atio_q)", qla83xx_msix_atio_q },
+	{ "qla2xxx (qpair_multiq)", qla2xxx_msix_rsp_q },
 };
 
-static struct qla_init_msix_entry qla82xx_msix_entries[2] = {
+static struct qla_init_msix_entry qla82xx_msix_entries[] = {
 	{ "qla2xxx (default)", qla82xx_msix_default },
 	{ "qla2xxx (rsp_q)", qla82xx_msix_rsp_q },
 };
 
-static struct qla_init_msix_entry qla83xx_msix_entries[3] = {
-	{ "qla2xxx (default)", qla24xx_msix_default },
-	{ "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
-	{ "qla2xxx (atio_q)", qla83xx_msix_atio_q },
-};
-
-static void
-qla24xx_disable_msix(struct qla_hw_data *ha)
-{
-	int i;
-	struct qla_msix_entry *qentry;
-	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
-
-	for (i = 0; i < ha->msix_count; i++) {
-		qentry = &ha->msix_entries[i];
-		if (qentry->have_irq) {
-			/* un-register irq cpu affinity notification */
-			irq_set_affinity_notifier(qentry->vector, NULL);
-			free_irq(qentry->vector, qentry->rsp);
-		}
-	}
-	pci_disable_msix(ha->pdev);
-	kfree(ha->msix_entries);
-	ha->msix_entries = NULL;
-	ha->flags.msix_enabled = 0;
-	ql_dbg(ql_dbg_init, vha, 0x0042,
-	    "Disabled the MSI.\n");
-}
-
 static int
 qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
 {
 #define MIN_MSIX_COUNT	2
-#define ATIO_VECTOR	2
 	int i, ret;
-	struct msix_entry *entries;
 	struct qla_msix_entry *qentry;
 	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 
-	entries = kzalloc(sizeof(struct msix_entry) * ha->msix_count,
-			GFP_KERNEL);
-	if (!entries) {
-		ql_log(ql_log_warn, vha, 0x00bc,
-		    "Failed to allocate memory for msix_entry.\n");
-		return -ENOMEM;
-	}
-
-	for (i = 0; i < ha->msix_count; i++)
-		entries[i].entry = i;
-
-	ret = pci_enable_msix_range(ha->pdev,
-				    entries, MIN_MSIX_COUNT, ha->msix_count);
+	ret = pci_alloc_irq_vectors(ha->pdev, MIN_MSIX_COUNT, ha->msix_count,
+				    PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
 	if (ret < 0) {
 		ql_log(ql_log_fatal, vha, 0x00c7,
 		    "MSI-X: Failed to enable support, "
@@ -3081,10 +3034,23 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
 	} else if (ret < ha->msix_count) {
 		ql_log(ql_log_warn, vha, 0x00c6,
 		    "MSI-X: Failed to enable support "
-		    "-- %d/%d\n Retry with %d vectors.\n",
-		    ha->msix_count, ret, ret);
+		     "with %d vectors, using %d vectors.\n",
+		    ha->msix_count, ret);
 		ha->msix_count = ret;
-		ha->max_rsp_queues = ha->msix_count - 1;
+		/* Recalculate queue values */
+		if (ha->mqiobase && ql2xmqsupport) {
+			ha->max_req_queues = ha->msix_count - 1;
+
+			/* ATIOQ needs 1 vector. That's 1 less QPair */
+			if (QLA_TGT_MODE_ENABLED())
+				ha->max_req_queues--;
+
+			ha->max_rsp_queues = ha->max_req_queues;
+
+			ha->max_qpairs = ha->max_req_queues - 1;
+			ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0190,
+			    "Adjusted Max no of queues pairs: %d.\n", ha->max_qpairs);
+		}
 	}
 	ha->msix_entries = kzalloc(sizeof(struct qla_msix_entry) *
 				ha->msix_count, GFP_KERNEL);
@@ -3098,20 +3064,23 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
 
 	for (i = 0; i < ha->msix_count; i++) {
 		qentry = &ha->msix_entries[i];
-		qentry->vector = entries[i].vector;
-		qentry->entry = entries[i].entry;
+		qentry->vector = pci_irq_vector(ha->pdev, i);
+		qentry->entry = i;
 		qentry->have_irq = 0;
-		qentry->rsp = NULL;
+		qentry->in_use = 0;
+		qentry->handle = NULL;
 		qentry->irq_notify.notify  = qla_irq_affinity_notify;
 		qentry->irq_notify.release = qla_irq_affinity_release;
 		qentry->cpuid = -1;
 	}
 
 	/* Enable MSI-X vectors for the base queue */
-	for (i = 0; i < 2; i++) {
+	for (i = 0; i < (QLA_MSIX_RSP_Q + 1); i++) {
 		qentry = &ha->msix_entries[i];
-		qentry->rsp = rsp;
+		qentry->handle = rsp;
 		rsp->msix = qentry;
+		scnprintf(qentry->name, sizeof(qentry->name),
+		    msix_entries[i].name);
 		if (IS_P3P_TYPE(ha))
 			ret = request_irq(qentry->vector,
 				qla82xx_msix_entries[i].handler,
@@ -3123,6 +3092,7 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
 		if (ret)
 			goto msix_register_fail;
 		qentry->have_irq = 1;
+		qentry->in_use = 1;
 
 		/* Register for CPU affinity notification. */
 		irq_set_affinity_notifier(qentry->vector, &qentry->irq_notify);
@@ -3142,12 +3112,15 @@ qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
 	 * queue.
 	 */
 	if (QLA_TGT_MODE_ENABLED() && IS_ATIO_MSIX_CAPABLE(ha)) {
-		qentry = &ha->msix_entries[ATIO_VECTOR];
-		qentry->rsp = rsp;
+		qentry = &ha->msix_entries[QLA_ATIO_VECTOR];
 		rsp->msix = qentry;
+		qentry->handle = rsp;
+		scnprintf(qentry->name, sizeof(qentry->name),
+		    msix_entries[QLA_ATIO_VECTOR].name);
+		qentry->in_use = 1;
 		ret = request_irq(qentry->vector,
-			qla83xx_msix_entries[ATIO_VECTOR].handler,
-			0, qla83xx_msix_entries[ATIO_VECTOR].name, rsp);
+			msix_entries[QLA_ATIO_VECTOR].handler,
+			0, msix_entries[QLA_ATIO_VECTOR].name, rsp);
 		qentry->have_irq = 1;
 	}
 
@@ -3156,7 +3129,7 @@ msix_register_fail:
 		ql_log(ql_log_fatal, vha, 0x00cb,
 		    "MSI-X: unable to register handler -- %x/%d.\n",
 		    qentry->vector, ret);
-		qla24xx_disable_msix(ha);
+		qla2x00_free_irqs(vha);
 		ha->mqenable = 0;
 		goto msix_out;
 	}
@@ -3164,11 +3137,13 @@ msix_register_fail:
 	/* Enable MSI-X vector for response queue update for queue 0 */
 	if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
 		if (ha->msixbase && ha->mqiobase &&
-		    (ha->max_rsp_queues > 1 || ha->max_req_queues > 1))
+		    (ha->max_rsp_queues > 1 || ha->max_req_queues > 1 ||
+		     ql2xmqsupport))
 			ha->mqenable = 1;
 	} else
-		if (ha->mqiobase
-		    && (ha->max_rsp_queues > 1 || ha->max_req_queues > 1))
+		if (ha->mqiobase &&
+		    (ha->max_rsp_queues > 1 || ha->max_req_queues > 1 ||
+		     ql2xmqsupport))
 			ha->mqenable = 1;
 	ql_dbg(ql_dbg_multiq, vha, 0xc005,
 	    "mqiobase=%p, max_rsp_queues=%d, max_req_queues=%d.\n",
@@ -3178,7 +3153,6 @@ msix_register_fail:
 	    ha->mqiobase, ha->max_rsp_queues, ha->max_req_queues);
 
 msix_out:
-	kfree(entries);
 	return ret;
 }
 
@@ -3231,7 +3205,7 @@ skip_msix:
 	    !IS_QLA27XX(ha))
 		goto skip_msi;
 
-	ret = pci_enable_msi(ha->pdev);
+	ret = pci_alloc_irq_vectors(ha->pdev, 1, 1, PCI_IRQ_MSI);
 	if (!ret) {
 		ql_dbg(ql_dbg_init, vha, 0x0038,
 		    "MSI: Enabled.\n");
@@ -3276,6 +3250,8 @@ qla2x00_free_irqs(scsi_qla_host_t *vha)
 {
 	struct qla_hw_data *ha = vha->hw;
 	struct rsp_que *rsp;
+	struct qla_msix_entry *qentry;
+	int i;
 
 	/*
 	 * We need to check that ha->rsp_q_map is valid in case we are called
@@ -3285,25 +3261,36 @@ qla2x00_free_irqs(scsi_qla_host_t *vha)
 		return;
 	rsp = ha->rsp_q_map[0];
 
-	if (ha->flags.msix_enabled)
-		qla24xx_disable_msix(ha);
-	else if (ha->flags.msi_enabled) {
-		free_irq(ha->pdev->irq, rsp);
-		pci_disable_msi(ha->pdev);
-	} else
-		free_irq(ha->pdev->irq, rsp);
-}
+	if (ha->flags.msix_enabled) {
+		for (i = 0; i < ha->msix_count; i++) {
+			qentry = &ha->msix_entries[i];
+			if (qentry->have_irq) {
+				irq_set_affinity_notifier(qentry->vector, NULL);
+				free_irq(pci_irq_vector(ha->pdev, i), qentry->handle);
+			}
+		}
+		kfree(ha->msix_entries);
+		ha->msix_entries = NULL;
+		ha->flags.msix_enabled = 0;
+		ql_dbg(ql_dbg_init, vha, 0x0042,
+			"Disabled MSI-X.\n");
+	} else {
+		free_irq(pci_irq_vector(ha->pdev, 0), rsp);
+	}
 
+	pci_free_irq_vectors(ha->pdev);
+}
 
-int qla25xx_request_irq(struct rsp_que *rsp)
+int qla25xx_request_irq(struct qla_hw_data *ha, struct qla_qpair *qpair,
+	struct qla_msix_entry *msix, int vector_type)
 {
-	struct qla_hw_data *ha = rsp->hw;
-	struct qla_init_msix_entry *intr = &msix_entries[2];
-	struct qla_msix_entry *msix = rsp->msix;
+	struct qla_init_msix_entry *intr = &msix_entries[vector_type];
 	scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 	int ret;
 
-	ret = request_irq(msix->vector, intr->handler, 0, intr->name, rsp);
+	scnprintf(msix->name, sizeof(msix->name),
+	    "qla2xxx%lu_qpair%d", vha->host_no, qpair->id);
+	ret = request_irq(msix->vector, intr->handler, 0, msix->name, qpair);
 	if (ret) {
 		ql_log(ql_log_fatal, vha, 0x00e6,
 		    "MSI-X: Unable to register handler -- %x/%d.\n",
@@ -3311,7 +3298,7 @@ int qla25xx_request_irq(struct rsp_que *rsp)
 		return ret;
 	}
 	msix->have_irq = 1;
-	msix->rsp = rsp;
+	msix->handle = qpair;
 	return ret;
 }
 
@@ -3324,11 +3311,12 @@ static void qla_irq_affinity_notify(struct irq_affinity_notify *notify,
 		container_of(notify, struct qla_msix_entry, irq_notify);
 	struct qla_hw_data *ha;
 	struct scsi_qla_host *base_vha;
+	struct rsp_que *rsp = e->handle;
 
 	/* user is recommended to set mask to just 1 cpu */
 	e->cpuid = cpumask_first(mask);
 
-	ha = e->rsp->hw;
+	ha = rsp->hw;
 	base_vha = pci_get_drvdata(ha->pdev);
 
 	ql_dbg(ql_dbg_init, base_vha, 0xffff,
@@ -3352,9 +3340,10 @@ static void qla_irq_affinity_release(struct kref *ref)
 		container_of(ref, struct irq_affinity_notify, kref);
 	struct qla_msix_entry *e =
 		container_of(notify, struct qla_msix_entry, irq_notify);
-	struct scsi_qla_host *base_vha = pci_get_drvdata(e->rsp->hw->pdev);
+	struct rsp_que *rsp = e->handle;
+	struct scsi_qla_host *base_vha = pci_get_drvdata(rsp->hw->pdev);
 
 	ql_dbg(ql_dbg_init, base_vha, 0xffff,
-	    "%s: host%ld: vector %d cpu %d \n", __func__,
+		"%s: host%ld: vector %d cpu %d\n", __func__,
 	    base_vha->host_no, e->vector, e->cpuid);
 }

drivers/scsi/qla2xxx/qla_mbx.c

@@ -10,6 +10,43 @@
 #include <linux/delay.h>
 #include <linux/gfp.h>
 
+struct rom_cmd {
+	uint16_t cmd;
+} rom_cmds[] = {
+	{ MBC_LOAD_RAM },
+	{ MBC_EXECUTE_FIRMWARE },
+	{ MBC_READ_RAM_WORD },
+	{ MBC_MAILBOX_REGISTER_TEST },
+	{ MBC_VERIFY_CHECKSUM },
+	{ MBC_GET_FIRMWARE_VERSION },
+	{ MBC_LOAD_RISC_RAM },
+	{ MBC_DUMP_RISC_RAM },
+	{ MBC_LOAD_RISC_RAM_EXTENDED },
+	{ MBC_DUMP_RISC_RAM_EXTENDED },
+	{ MBC_WRITE_RAM_WORD_EXTENDED },
+	{ MBC_READ_RAM_EXTENDED },
+	{ MBC_GET_RESOURCE_COUNTS },
+	{ MBC_SET_FIRMWARE_OPTION },
+	{ MBC_MID_INITIALIZE_FIRMWARE },
+	{ MBC_GET_FIRMWARE_STATE },
+	{ MBC_GET_MEM_OFFLOAD_CNTRL_STAT },
+	{ MBC_GET_RETRY_COUNT },
+	{ MBC_TRACE_CONTROL },
+};
+
+static int is_rom_cmd(uint16_t cmd)
+{
+	int i;
+	struct  rom_cmd *wc;
+
+	for (i = 0; i < ARRAY_SIZE(rom_cmds); i++) {
+		wc = rom_cmds + i;
+		if (wc->cmd == cmd)
+			return 1;
+	}
+
+	return 0;
+}
 
 /*
  * qla2x00_mailbox_command
@@ -92,6 +129,17 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 		return QLA_FUNCTION_TIMEOUT;
 	}
 
+	/* check if ISP abort is active and return cmd with timeout */
+	if ((test_bit(ABORT_ISP_ACTIVE, &base_vha->dpc_flags) ||
+	    test_bit(ISP_ABORT_RETRY, &base_vha->dpc_flags) ||
+	    test_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags)) &&
+	    !is_rom_cmd(mcp->mb[0])) {
+		ql_log(ql_log_info, vha, 0x1005,
+		    "Cmd 0x%x aborted with timeout since ISP Abort is pending\n",
+		    mcp->mb[0]);
+		return QLA_FUNCTION_TIMEOUT;
+	}
+
 	/*
 	 * Wait for active mailbox commands to finish by waiting at most tov
 	 * seconds. This is to serialize actual issuing of mailbox cmds during
@@ -178,6 +226,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 			WRT_REG_WORD(&reg->isp.hccr, HCCR_SET_HOST_INT);
 		spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
+		wait_time = jiffies;
 		if (!wait_for_completion_timeout(&ha->mbx_intr_comp,
 		    mcp->tov * HZ)) {
 			ql_dbg(ql_dbg_mbx, vha, 0x117a,
@@ -186,6 +235,9 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 			clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 			spin_unlock_irqrestore(&ha->hardware_lock, flags);
 		}
+		if (time_after(jiffies, wait_time + 5 * HZ))
+			ql_log(ql_log_warn, vha, 0x1015, "cmd=0x%x, waited %d msecs\n",
+			    command, jiffies_to_msecs(jiffies - wait_time));
 	} else {
 		ql_dbg(ql_dbg_mbx, vha, 0x1011,
 		    "Cmd=%x Polling Mode.\n", command);
@@ -1194,12 +1246,17 @@ qla2x00_abort_command(srb_t *sp)
 	fc_port_t	*fcport = sp->fcport;
 	scsi_qla_host_t *vha = fcport->vha;
 	struct qla_hw_data *ha = vha->hw;
-	struct req_que *req = vha->req;
+	struct req_que *req;
 	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
 
 	ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x103b,
 	    "Entered %s.\n", __func__);
 
+	if (vha->flags.qpairs_available && sp->qpair)
+		req = sp->qpair->req;
+	else
+		req = vha->req;
+
 	spin_lock_irqsave(&ha->hardware_lock, flags);
 	for (handle = 1; handle < req->num_outstanding_cmds; handle++) {
 		if (req->outstanding_cmds[handle] == sp)
@@ -2152,10 +2209,10 @@ qla24xx_login_fabric(scsi_qla_host_t *vha, uint16_t loop_id, uint8_t domain,
 	ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x1061,
 	    "Entered %s.\n", __func__);
 
-	if (ha->flags.cpu_affinity_enabled)
-		req = ha->req_q_map[0];
+	if (vha->vp_idx && vha->qpair)
+		req = vha->qpair->req;
 	else
-		req = vha->req;
+		req = ha->req_q_map[0];
 
 	lg = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL, &lg_dma);
 	if (lg == NULL) {
@@ -2435,10 +2492,7 @@ qla24xx_fabric_logout(scsi_qla_host_t *vha, uint16_t loop_id, uint8_t domain,
 	}
 	memset(lg, 0, sizeof(struct logio_entry_24xx));
 
-	if (ql2xmaxqueues > 1)
-		req = ha->req_q_map[0];
-	else
-		req = vha->req;
+	req = vha->req;
 	lg->entry_type = LOGINOUT_PORT_IOCB_TYPE;
 	lg->entry_count = 1;
 	lg->handle = MAKE_HANDLE(req->id, lg->handle);
@@ -2904,6 +2958,9 @@ qla24xx_abort_command(srb_t *sp)
 	ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x108c,
 	    "Entered %s.\n", __func__);
 
+	if (vha->flags.qpairs_available && sp->qpair)
+		req = sp->qpair->req;
+
 	if (ql2xasynctmfenable)
 		return qla24xx_async_abort_command(sp);
 
@@ -2984,6 +3041,7 @@ __qla24xx_issue_tmf(char *name, uint32_t type, struct fc_port *fcport,
 	struct qla_hw_data *ha;
 	struct req_que *req;
 	struct rsp_que *rsp;
+	struct qla_qpair *qpair;
 
 	vha = fcport->vha;
 	ha = vha->hw;
@@ -2992,10 +3050,15 @@ __qla24xx_issue_tmf(char *name, uint32_t type, struct fc_port *fcport,
 	ql_dbg(ql_dbg_mbx + ql_dbg_verbose, vha, 0x1092,
 	    "Entered %s.\n", __func__);
 
-	if (ha->flags.cpu_affinity_enabled)
-		rsp = ha->rsp_q_map[tag + 1];
-	else
+	if (vha->vp_idx && vha->qpair) {
+		/* NPIV port */
+		qpair = vha->qpair;
+		rsp = qpair->rsp;
+		req = qpair->req;
+	} else {
 		rsp = req->rsp;
+	}
+
 	tsk = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL, &tsk_dma);
 	if (tsk == NULL) {
 		ql_log(ql_log_warn, vha, 0x1093,

drivers/scsi/qla2xxx/qla_mid.c

@@ -540,9 +540,10 @@ qla25xx_free_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 	uint16_t que_id = rsp->id;
 
 	if (rsp->msix && rsp->msix->have_irq) {
-		free_irq(rsp->msix->vector, rsp);
+		free_irq(rsp->msix->vector, rsp->msix->handle);
 		rsp->msix->have_irq = 0;
-		rsp->msix->rsp = NULL;
+		rsp->msix->in_use = 0;
+		rsp->msix->handle = NULL;
 	}
 	dma_free_coherent(&ha->pdev->dev, (rsp->length + 1) *
 		sizeof(response_t), rsp->ring, rsp->dma);
@@ -573,7 +574,7 @@ qla25xx_delete_req_que(struct scsi_qla_host *vha, struct req_que *req)
 	return ret;
 }
 
-static int
+int
 qla25xx_delete_rsp_que(struct scsi_qla_host *vha, struct rsp_que *rsp)
 {
 	int ret = -1;
@@ -596,34 +597,42 @@ qla25xx_delete_queues(struct scsi_qla_host *vha)
 	struct req_que *req = NULL;
 	struct rsp_que *rsp = NULL;
 	struct qla_hw_data *ha = vha->hw;
+	struct qla_qpair *qpair, *tqpair;
 
-	/* Delete request queues */
-	for (cnt = 1; cnt < ha->max_req_queues; cnt++) {
-		req = ha->req_q_map[cnt];
-		if (req && test_bit(cnt, ha->req_qid_map)) {
-			ret = qla25xx_delete_req_que(vha, req);
-			if (ret != QLA_SUCCESS) {
-				ql_log(ql_log_warn, vha, 0x00ea,
-				    "Couldn't delete req que %d.\n",
-				    req->id);
-				return ret;
+	if (ql2xmqsupport) {
+		list_for_each_entry_safe(qpair, tqpair, &vha->qp_list,
+		    qp_list_elem)
+			qla2xxx_delete_qpair(vha, qpair);
+	} else {
+		/* Delete request queues */
+		for (cnt = 1; cnt < ha->max_req_queues; cnt++) {
+			req = ha->req_q_map[cnt];
+			if (req && test_bit(cnt, ha->req_qid_map)) {
+				ret = qla25xx_delete_req_que(vha, req);
+				if (ret != QLA_SUCCESS) {
+					ql_log(ql_log_warn, vha, 0x00ea,
+					    "Couldn't delete req que %d.\n",
+					    req->id);
+					return ret;
+				}
 			}
 		}
-	}
 
-	/* Delete response queues */
-	for (cnt = 1; cnt < ha->max_rsp_queues; cnt++) {
-		rsp = ha->rsp_q_map[cnt];
-		if (rsp && test_bit(cnt, ha->rsp_qid_map)) {
-			ret = qla25xx_delete_rsp_que(vha, rsp);
-			if (ret != QLA_SUCCESS) {
-				ql_log(ql_log_warn, vha, 0x00eb,
-				    "Couldn't delete rsp que %d.\n",
-				    rsp->id);
-				return ret;
+		/* Delete response queues */
+		for (cnt = 1; cnt < ha->max_rsp_queues; cnt++) {
+			rsp = ha->rsp_q_map[cnt];
+			if (rsp && test_bit(cnt, ha->rsp_qid_map)) {
+				ret = qla25xx_delete_rsp_que(vha, rsp);
+				if (ret != QLA_SUCCESS) {
+					ql_log(ql_log_warn, vha, 0x00eb,
+					    "Couldn't delete rsp que %d.\n",
+					    rsp->id);
+					return ret;
+				}
 			}
 		}
 	}
+
 	return ret;
 }
 
@@ -659,10 +668,10 @@ qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
 	if (ret != QLA_SUCCESS)
 		goto que_failed;
 
-	mutex_lock(&ha->vport_lock);
+	mutex_lock(&ha->mq_lock);
 	que_id = find_first_zero_bit(ha->req_qid_map, ha->max_req_queues);
 	if (que_id >= ha->max_req_queues) {
-		mutex_unlock(&ha->vport_lock);
+		mutex_unlock(&ha->mq_lock);
 		ql_log(ql_log_warn, base_vha, 0x00db,
 		    "No resources to create additional request queue.\n");
 		goto que_failed;
@@ -708,7 +717,7 @@ qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
 	req->req_q_out = &reg->isp25mq.req_q_out;
 	req->max_q_depth = ha->req_q_map[0]->max_q_depth;
 	req->out_ptr = (void *)(req->ring + req->length);
-	mutex_unlock(&ha->vport_lock);
+	mutex_unlock(&ha->mq_lock);
 	ql_dbg(ql_dbg_multiq, base_vha, 0xc004,
 	    "ring_ptr=%p ring_index=%d, "
 	    "cnt=%d id=%d max_q_depth=%d.\n",
@@ -724,9 +733,9 @@ qla25xx_create_req_que(struct qla_hw_data *ha, uint16_t options,
 	if (ret != QLA_SUCCESS) {
 		ql_log(ql_log_fatal, base_vha, 0x00df,
 		    "%s failed.\n", __func__);
-		mutex_lock(&ha->vport_lock);
+		mutex_lock(&ha->mq_lock);
 		clear_bit(que_id, ha->req_qid_map);
-		mutex_unlock(&ha->vport_lock);
+		mutex_unlock(&ha->mq_lock);
 		goto que_failed;
 	}
 
@@ -741,20 +750,20 @@ failed:
 static void qla_do_work(struct work_struct *work)
 {
 	unsigned long flags;
-	struct rsp_que *rsp = container_of(work, struct rsp_que, q_work);
+	struct qla_qpair *qpair = container_of(work, struct qla_qpair, q_work);
 	struct scsi_qla_host *vha;
-	struct qla_hw_data *ha = rsp->hw;
+	struct qla_hw_data *ha = qpair->hw;
 
-	spin_lock_irqsave(&rsp->hw->hardware_lock, flags);
+	spin_lock_irqsave(&qpair->qp_lock, flags);
 	vha = pci_get_drvdata(ha->pdev);
-	qla24xx_process_response_queue(vha, rsp);
-	spin_unlock_irqrestore(&rsp->hw->hardware_lock, flags);
+	qla24xx_process_response_queue(vha, qpair->rsp);
+	spin_unlock_irqrestore(&qpair->qp_lock, flags);
 }
 
 /* create response queue */
 int
 qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
-	uint8_t vp_idx, uint16_t rid, int req)
+	uint8_t vp_idx, uint16_t rid, struct qla_qpair *qpair)
 {
 	int ret = 0;
 	struct rsp_que *rsp = NULL;
@@ -779,28 +788,24 @@ qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
 		goto que_failed;
 	}
 
-	mutex_lock(&ha->vport_lock);
+	mutex_lock(&ha->mq_lock);
 	que_id = find_first_zero_bit(ha->rsp_qid_map, ha->max_rsp_queues);
 	if (que_id >= ha->max_rsp_queues) {
-		mutex_unlock(&ha->vport_lock);
+		mutex_unlock(&ha->mq_lock);
 		ql_log(ql_log_warn, base_vha, 0x00e2,
 		    "No resources to create additional request queue.\n");
 		goto que_failed;
 	}
 	set_bit(que_id, ha->rsp_qid_map);
 
-	if (ha->flags.msix_enabled)
-		rsp->msix = &ha->msix_entries[que_id + 1];
-	else
-		ql_log(ql_log_warn, base_vha, 0x00e3,
-		    "MSIX not enabled.\n");
+	rsp->msix = qpair->msix;
 
 	ha->rsp_q_map[que_id] = rsp;
 	rsp->rid = rid;
 	rsp->vp_idx = vp_idx;
 	rsp->hw = ha;
 	ql_dbg(ql_dbg_init, base_vha, 0x00e4,
-	    "queue_id=%d rid=%d vp_idx=%d hw=%p.\n",
+	    "rsp queue_id=%d rid=%d vp_idx=%d hw=%p.\n",
 	    que_id, rsp->rid, rsp->vp_idx, rsp->hw);
 	/* Use alternate PCI bus number */
 	if (MSB(rsp->rid))
@@ -812,23 +817,27 @@ qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
 	if (!IS_MSIX_NACK_CAPABLE(ha))
 		options |= BIT_6;
 
+	/* Set option to indicate response queue creation */
+	options |= BIT_1;
+
 	rsp->options = options;
 	rsp->id = que_id;
 	reg = ISP_QUE_REG(ha, que_id);
 	rsp->rsp_q_in = &reg->isp25mq.rsp_q_in;
 	rsp->rsp_q_out = &reg->isp25mq.rsp_q_out;
 	rsp->in_ptr = (void *)(rsp->ring + rsp->length);
-	mutex_unlock(&ha->vport_lock);
+	mutex_unlock(&ha->mq_lock);
 	ql_dbg(ql_dbg_multiq, base_vha, 0xc00b,
-	    "options=%x id=%d rsp_q_in=%p rsp_q_out=%p",
+	    "options=%x id=%d rsp_q_in=%p rsp_q_out=%p\n",
 	    rsp->options, rsp->id, rsp->rsp_q_in,
 	    rsp->rsp_q_out);
 	ql_dbg(ql_dbg_init, base_vha, 0x00e5,
-	    "options=%x id=%d rsp_q_in=%p rsp_q_out=%p",
+	    "options=%x id=%d rsp_q_in=%p rsp_q_out=%p\n",
 	    rsp->options, rsp->id, rsp->rsp_q_in,
 	    rsp->rsp_q_out);
 
-	ret = qla25xx_request_irq(rsp);
+	ret = qla25xx_request_irq(ha, qpair, qpair->msix,
+	    QLA_MSIX_QPAIR_MULTIQ_RSP_Q);
 	if (ret)
 		goto que_failed;
 
@@ -836,19 +845,16 @@ qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
 	if (ret != QLA_SUCCESS) {
 		ql_log(ql_log_fatal, base_vha, 0x00e7,
 		    "%s failed.\n", __func__);
-		mutex_lock(&ha->vport_lock);
+		mutex_lock(&ha->mq_lock);
 		clear_bit(que_id, ha->rsp_qid_map);
-		mutex_unlock(&ha->vport_lock);
+		mutex_unlock(&ha->mq_lock);
 		goto que_failed;
 	}
-	if (req >= 0)
-		rsp->req = ha->req_q_map[req];
-	else
-		rsp->req = NULL;
+	rsp->req = NULL;
 
 	qla2x00_init_response_q_entries(rsp);
-	if (rsp->hw->wq)
-		INIT_WORK(&rsp->q_work, qla_do_work);
+	if (qpair->hw->wq)
+		INIT_WORK(&qpair->q_work, qla_do_work);
 	return rsp->id;
 
 que_failed:

drivers/scsi/qla2xxx/qla_os.c

@@ -13,6 +13,7 @@
 #include <linux/mutex.h>
 #include <linux/kobject.h>
 #include <linux/slab.h>
+#include <linux/blk-mq-pci.h>
 #include <scsi/scsi_tcq.h>
 #include <scsi/scsicam.h>
 #include <scsi/scsi_transport.h>
@@ -30,7 +31,7 @@ static int apidev_major;
 /*
  * SRB allocation cache
  */
-static struct kmem_cache *srb_cachep;
+struct kmem_cache *srb_cachep;
 
 /*
  * CT6 CTX allocation cache
@@ -143,19 +144,12 @@ MODULE_PARM_DESC(ql2xiidmaenable,
 		"Enables iIDMA settings "
 		"Default is 1 - perform iIDMA. 0 - no iIDMA.");
 
-int ql2xmaxqueues = 1;
-module_param(ql2xmaxqueues, int, S_IRUGO);
-MODULE_PARM_DESC(ql2xmaxqueues,
-		"Enables MQ settings "
-		"Default is 1 for single queue. Set it to number "
-		"of queues in MQ mode.");
-
-int ql2xmultique_tag;
-module_param(ql2xmultique_tag, int, S_IRUGO);
-MODULE_PARM_DESC(ql2xmultique_tag,
-		"Enables CPU affinity settings for the driver "
-		"Default is 0 for no affinity of request and response IO. "
-		"Set it to 1 to turn on the cpu affinity.");
+int ql2xmqsupport = 1;
+module_param(ql2xmqsupport, int, S_IRUGO);
+MODULE_PARM_DESC(ql2xmqsupport,
+		"Enable on demand multiple queue pairs support "
+		"Default is 1 for supported. "
+		"Set it to 0 to turn off mq qpair support.");
 
 int ql2xfwloadbin;
 module_param(ql2xfwloadbin, int, S_IRUGO|S_IWUSR);
@@ -261,6 +255,7 @@ static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
 static void qla2x00_clear_drv_active(struct qla_hw_data *);
 static void qla2x00_free_device(scsi_qla_host_t *);
 static void qla83xx_disable_laser(scsi_qla_host_t *vha);
+static int qla2xxx_map_queues(struct Scsi_Host *shost);
 
 struct scsi_host_template qla2xxx_driver_template = {
 	.module			= THIS_MODULE,
@@ -280,6 +275,7 @@ struct scsi_host_template qla2xxx_driver_template = {
 	.scan_finished		= qla2xxx_scan_finished,
 	.scan_start		= qla2xxx_scan_start,
 	.change_queue_depth	= scsi_change_queue_depth,
+	.map_queues             = qla2xxx_map_queues,
 	.this_id		= -1,
 	.cmd_per_lun		= 3,
 	.use_clustering		= ENABLE_CLUSTERING,
@@ -339,6 +335,8 @@ static int qla2x00_mem_alloc(struct qla_hw_data *, uint16_t, uint16_t,
 	struct req_que **, struct rsp_que **);
 static void qla2x00_free_fw_dump(struct qla_hw_data *);
 static void qla2x00_mem_free(struct qla_hw_data *);
+int qla2xxx_mqueuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd,
+	struct qla_qpair *qpair);
 
 /* -------------------------------------------------------------------------- */
 static int qla2x00_alloc_queues(struct qla_hw_data *ha, struct req_que *req,
@@ -360,6 +358,25 @@ static int qla2x00_alloc_queues(struct qla_hw_data *ha, struct req_que *req,
 		    "Unable to allocate memory for response queue ptrs.\n");
 		goto fail_rsp_map;
 	}
+
+	if (ql2xmqsupport && ha->max_qpairs) {
+		ha->queue_pair_map = kcalloc(ha->max_qpairs, sizeof(struct qla_qpair *),
+			GFP_KERNEL);
+		if (!ha->queue_pair_map) {
+			ql_log(ql_log_fatal, vha, 0x0180,
+			    "Unable to allocate memory for queue pair ptrs.\n");
+			goto fail_qpair_map;
+		}
+		ha->base_qpair = kzalloc(sizeof(struct qla_qpair), GFP_KERNEL);
+		if (ha->base_qpair == NULL) {
+			ql_log(ql_log_warn, vha, 0x0182,
+			    "Failed to allocate base queue pair memory.\n");
+			goto fail_base_qpair;
+		}
+		ha->base_qpair->req = req;
+		ha->base_qpair->rsp = rsp;
+	}
+
 	/*
 	 * Make sure we record at least the request and response queue zero in
 	 * case we need to free them if part of the probe fails.
@@ -370,6 +387,11 @@ static int qla2x00_alloc_queues(struct qla_hw_data *ha, struct req_que *req,
 	set_bit(0, ha->req_qid_map);
 	return 1;
 
+fail_base_qpair:
+	kfree(ha->queue_pair_map);
+fail_qpair_map:
+	kfree(ha->rsp_q_map);
+	ha->rsp_q_map = NULL;
 fail_rsp_map:
 	kfree(ha->req_q_map);
 	ha->req_q_map = NULL;
@@ -417,82 +439,43 @@ static void qla2x00_free_queues(struct qla_hw_data *ha)
 	struct req_que *req;
 	struct rsp_que *rsp;
 	int cnt;
+	unsigned long flags;
 
+	spin_lock_irqsave(&ha->hardware_lock, flags);
 	for (cnt = 0; cnt < ha->max_req_queues; cnt++) {
 		if (!test_bit(cnt, ha->req_qid_map))
 			continue;
 
 		req = ha->req_q_map[cnt];
+		clear_bit(cnt, ha->req_qid_map);
+		ha->req_q_map[cnt] = NULL;
+
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
 		qla2x00_free_req_que(ha, req);
+		spin_lock_irqsave(&ha->hardware_lock, flags);
 	}
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
 	kfree(ha->req_q_map);
 	ha->req_q_map = NULL;
 
+
+	spin_lock_irqsave(&ha->hardware_lock, flags);
 	for (cnt = 0; cnt < ha->max_rsp_queues; cnt++) {
 		if (!test_bit(cnt, ha->rsp_qid_map))
 			continue;
 
 		rsp = ha->rsp_q_map[cnt];
+		clear_bit(cnt, ha->req_qid_map);
+		ha->rsp_q_map[cnt] =  NULL;
+		spin_unlock_irqrestore(&ha->hardware_lock, flags);
 		qla2x00_free_rsp_que(ha, rsp);
+		spin_lock_irqsave(&ha->hardware_lock, flags);
 	}
-	kfree(ha->rsp_q_map);
-	ha->rsp_q_map = NULL;
-}
-
-static int qla25xx_setup_mode(struct scsi_qla_host *vha)
-{
-	uint16_t options = 0;
-	int ques, req, ret;
-	struct qla_hw_data *ha = vha->hw;
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
-	if (!(ha->fw_attributes & BIT_6)) {
-		ql_log(ql_log_warn, vha, 0x00d8,
-		    "Firmware is not multi-queue capable.\n");
-		goto fail;
-	}
-	if (ql2xmultique_tag) {
-		/* create a request queue for IO */
-		options |= BIT_7;
-		req = qla25xx_create_req_que(ha, options, 0, 0, -1,
-			QLA_DEFAULT_QUE_QOS);
-		if (!req) {
-			ql_log(ql_log_warn, vha, 0x00e0,
-			    "Failed to create request queue.\n");
-			goto fail;
-		}
-		ha->wq = alloc_workqueue("qla2xxx_wq", WQ_MEM_RECLAIM, 1);
-		vha->req = ha->req_q_map[req];
-		options |= BIT_1;
-		for (ques = 1; ques < ha->max_rsp_queues; ques++) {
-			ret = qla25xx_create_rsp_que(ha, options, 0, 0, req);
-			if (!ret) {
-				ql_log(ql_log_warn, vha, 0x00e8,
-				    "Failed to create response queue.\n");
-				goto fail2;
-			}
-		}
-		ha->flags.cpu_affinity_enabled = 1;
-		ql_dbg(ql_dbg_multiq, vha, 0xc007,
-		    "CPU affinity mode enabled, "
-		    "no. of response queues:%d no. of request queues:%d.\n",
-		    ha->max_rsp_queues, ha->max_req_queues);
-		ql_dbg(ql_dbg_init, vha, 0x00e9,
-		    "CPU affinity mode enabled, "
-		    "no. of response queues:%d no. of request queues:%d.\n",
-		    ha->max_rsp_queues, ha->max_req_queues);
-	}
-	return 0;
-fail2:
-	qla25xx_delete_queues(vha);
-	destroy_workqueue(ha->wq);
-	ha->wq = NULL;
-	vha->req = ha->req_q_map[0];
-fail:
-	ha->mqenable = 0;
-	kfree(ha->req_q_map);
 	kfree(ha->rsp_q_map);
-	ha->max_req_queues = ha->max_rsp_queues = 1;
-	return 1;
+	ha->rsp_q_map = NULL;
 }
 
 static char *
@@ -669,7 +652,7 @@ qla2x00_sp_free_dma(void *vha, void *ptr)
 	qla2x00_rel_sp(sp->fcport->vha, sp);
 }
 
-static void
+void
 qla2x00_sp_compl(void *data, void *ptr, int res)
 {
 	struct qla_hw_data *ha = (struct qla_hw_data *)data;
@@ -693,6 +676,75 @@ qla2x00_sp_compl(void *data, void *ptr, int res)
 	cmd->scsi_done(cmd);
 }
 
+void
+qla2xxx_qpair_sp_free_dma(void *vha, void *ptr)
+{
+	srb_t *sp = (srb_t *)ptr;
+	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
+	struct qla_hw_data *ha = sp->fcport->vha->hw;
+	void *ctx = GET_CMD_CTX_SP(sp);
+
+	if (sp->flags & SRB_DMA_VALID) {
+		scsi_dma_unmap(cmd);
+		sp->flags &= ~SRB_DMA_VALID;
+	}
+
+	if (sp->flags & SRB_CRC_PROT_DMA_VALID) {
+		dma_unmap_sg(&ha->pdev->dev, scsi_prot_sglist(cmd),
+		    scsi_prot_sg_count(cmd), cmd->sc_data_direction);
+		sp->flags &= ~SRB_CRC_PROT_DMA_VALID;
+	}
+
+	if (sp->flags & SRB_CRC_CTX_DSD_VALID) {
+		/* List assured to be having elements */
+		qla2x00_clean_dsd_pool(ha, sp, NULL);
+		sp->flags &= ~SRB_CRC_CTX_DSD_VALID;
+	}
+
+	if (sp->flags & SRB_CRC_CTX_DMA_VALID) {
+		dma_pool_free(ha->dl_dma_pool, ctx,
+		    ((struct crc_context *)ctx)->crc_ctx_dma);
+		sp->flags &= ~SRB_CRC_CTX_DMA_VALID;
+	}
+
+	if (sp->flags & SRB_FCP_CMND_DMA_VALID) {
+		struct ct6_dsd *ctx1 = (struct ct6_dsd *)ctx;
+
+		dma_pool_free(ha->fcp_cmnd_dma_pool, ctx1->fcp_cmnd,
+		    ctx1->fcp_cmnd_dma);
+		list_splice(&ctx1->dsd_list, &ha->gbl_dsd_list);
+		ha->gbl_dsd_inuse -= ctx1->dsd_use_cnt;
+		ha->gbl_dsd_avail += ctx1->dsd_use_cnt;
+		mempool_free(ctx1, ha->ctx_mempool);
+	}
+
+	CMD_SP(cmd) = NULL;
+	qla2xxx_rel_qpair_sp(sp->qpair, sp);
+}
+
+void
+qla2xxx_qpair_sp_compl(void *data, void *ptr, int res)
+{
+	srb_t *sp = (srb_t *)ptr;
+	struct scsi_cmnd *cmd = GET_CMD_SP(sp);
+
+	cmd->result = res;
+
+	if (atomic_read(&sp->ref_count) == 0) {
+		ql_dbg(ql_dbg_io, sp->fcport->vha, 0x3079,
+		    "SP reference-count to ZERO -- sp=%p cmd=%p.\n",
+		    sp, GET_CMD_SP(sp));
+		if (ql2xextended_error_logging & ql_dbg_io)
+			WARN_ON(atomic_read(&sp->ref_count) == 0);
+		return;
+	}
+	if (!atomic_dec_and_test(&sp->ref_count))
+		return;
+
+	qla2xxx_qpair_sp_free_dma(sp->fcport->vha, sp);
+	cmd->scsi_done(cmd);
+}
+
 /* If we are SP1 here, we need to still take and release the host_lock as SP1
  * does not have the changes necessary to avoid taking host->host_lock.
  */
@@ -706,12 +758,28 @@ qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 	struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
 	srb_t *sp;
 	int rval;
+	struct qla_qpair *qpair = NULL;
+	uint32_t tag;
+	uint16_t hwq;
 
 	if (unlikely(test_bit(UNLOADING, &base_vha->dpc_flags))) {
 		cmd->result = DID_NO_CONNECT << 16;
 		goto qc24_fail_command;
 	}
 
+	if (ha->mqenable) {
+		if (shost_use_blk_mq(vha->host)) {
+			tag = blk_mq_unique_tag(cmd->request);
+			hwq = blk_mq_unique_tag_to_hwq(tag);
+			qpair = ha->queue_pair_map[hwq];
+		} else if (vha->vp_idx && vha->qpair) {
+			qpair = vha->qpair;
+		}
+
+		if (qpair)
+			return qla2xxx_mqueuecommand(host, cmd, qpair);
+	}
+
 	if (ha->flags.eeh_busy) {
 		if (ha->flags.pci_channel_io_perm_failure) {
 			ql_dbg(ql_dbg_aer, vha, 0x9010,
@@ -808,6 +876,95 @@ qc24_fail_command:
 	return 0;
 }
 
+/* For MQ supported I/O */
+int
+qla2xxx_mqueuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd,
+    struct qla_qpair *qpair)
+{
+	scsi_qla_host_t *vha = shost_priv(host);
+	fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
+	struct fc_rport *rport = starget_to_rport(scsi_target(cmd->device));
+	struct qla_hw_data *ha = vha->hw;
+	struct scsi_qla_host *base_vha = pci_get_drvdata(ha->pdev);
+	srb_t *sp;
+	int rval;
+
+	rval = fc_remote_port_chkready(rport);
+	if (rval) {
+		cmd->result = rval;
+		ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x3076,
+		    "fc_remote_port_chkready failed for cmd=%p, rval=0x%x.\n",
+		    cmd, rval);
+		goto qc24_fail_command;
+	}
+
+	if (!fcport) {
+		cmd->result = DID_NO_CONNECT << 16;
+		goto qc24_fail_command;
+	}
+
+	if (atomic_read(&fcport->state) != FCS_ONLINE) {
+		if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
+			atomic_read(&base_vha->loop_state) == LOOP_DEAD) {
+			ql_dbg(ql_dbg_io, vha, 0x3077,
+			    "Returning DNC, fcport_state=%d loop_state=%d.\n",
+			    atomic_read(&fcport->state),
+			    atomic_read(&base_vha->loop_state));
+			cmd->result = DID_NO_CONNECT << 16;
+			goto qc24_fail_command;
+		}
+		goto qc24_target_busy;
+	}
+
+	/*
+	 * Return target busy if we've received a non-zero retry_delay_timer
+	 * in a FCP_RSP.
+	 */
+	if (fcport->retry_delay_timestamp == 0) {
+		/* retry delay not set */
+	} else if (time_after(jiffies, fcport->retry_delay_timestamp))
+		fcport->retry_delay_timestamp = 0;
+	else
+		goto qc24_target_busy;
+
+	sp = qla2xxx_get_qpair_sp(qpair, fcport, GFP_ATOMIC);
+	if (!sp)
+		goto qc24_host_busy;
+
+	sp->u.scmd.cmd = cmd;
+	sp->type = SRB_SCSI_CMD;
+	atomic_set(&sp->ref_count, 1);
+	CMD_SP(cmd) = (void *)sp;
+	sp->free = qla2xxx_qpair_sp_free_dma;
+	sp->done = qla2xxx_qpair_sp_compl;
+	sp->qpair = qpair;
+
+	rval = ha->isp_ops->start_scsi_mq(sp);
+	if (rval != QLA_SUCCESS) {
+		ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x3078,
+		    "Start scsi failed rval=%d for cmd=%p.\n", rval, cmd);
+		if (rval == QLA_INTERFACE_ERROR)
+			goto qc24_fail_command;
+		goto qc24_host_busy_free_sp;
+	}
+
+	return 0;
+
+qc24_host_busy_free_sp:
+	qla2xxx_qpair_sp_free_dma(vha, sp);
+
+qc24_host_busy:
+	return SCSI_MLQUEUE_HOST_BUSY;
+
+qc24_target_busy:
+	return SCSI_MLQUEUE_TARGET_BUSY;
+
+qc24_fail_command:
+	cmd->scsi_done(cmd);
+
+	return 0;
+}
+
 /*
  * qla2x00_eh_wait_on_command
  *    Waits for the command to be returned by the Firmware for some
@@ -1601,7 +1758,6 @@ qla2x00_iospace_config(struct qla_hw_data *ha)
 {
 	resource_size_t pio;
 	uint16_t msix;
-	int cpus;
 
 	if (pci_request_selected_regions(ha->pdev, ha->bars,
 	    QLA2XXX_DRIVER_NAME)) {
@@ -1658,9 +1814,7 @@ skip_pio:
 
 	/* Determine queue resources */
 	ha->max_req_queues = ha->max_rsp_queues = 1;
-	if ((ql2xmaxqueues <= 1 && !ql2xmultique_tag) ||
-		(ql2xmaxqueues > 1 && ql2xmultique_tag) ||
-		(!IS_QLA25XX(ha) && !IS_QLA81XX(ha)))
+	if (!ql2xmqsupport || (!IS_QLA25XX(ha) && !IS_QLA81XX(ha)))
 		goto mqiobase_exit;
 
 	ha->mqiobase = ioremap(pci_resource_start(ha->pdev, 3),
@@ -1670,26 +1824,18 @@ skip_pio:
 		    "MQIO Base=%p.\n", ha->mqiobase);
 		/* Read MSIX vector size of the board */
 		pci_read_config_word(ha->pdev, QLA_PCI_MSIX_CONTROL, &msix);
-		ha->msix_count = msix;
+		ha->msix_count = msix + 1;
 		/* Max queues are bounded by available msix vectors */
-		/* queue 0 uses two msix vectors */
-		if (ql2xmultique_tag) {
-			cpus = num_online_cpus();
-			ha->max_rsp_queues = (ha->msix_count - 1 > cpus) ?
-				(cpus + 1) : (ha->msix_count - 1);
-			ha->max_req_queues = 2;
-		} else if (ql2xmaxqueues > 1) {
-			ha->max_req_queues = ql2xmaxqueues > QLA_MQ_SIZE ?
-			    QLA_MQ_SIZE : ql2xmaxqueues;
-			ql_dbg_pci(ql_dbg_multiq, ha->pdev, 0xc008,
-			    "QoS mode set, max no of request queues:%d.\n",
-			    ha->max_req_queues);
-			ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0019,
-			    "QoS mode set, max no of request queues:%d.\n",
-			    ha->max_req_queues);
-		}
+		/* MB interrupt uses 1 vector */
+		ha->max_req_queues = ha->msix_count - 1;
+		ha->max_rsp_queues = ha->max_req_queues;
+		/* Queue pairs is the max value minus the base queue pair */
+		ha->max_qpairs = ha->max_rsp_queues - 1;
+		ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0188,
+		    "Max no of queues pairs: %d.\n", ha->max_qpairs);
+
 		ql_log_pci(ql_log_info, ha->pdev, 0x001a,
-		    "MSI-X vector count: %d.\n", msix);
+		    "MSI-X vector count: %d.\n", ha->msix_count);
 	} else
 		ql_log_pci(ql_log_info, ha->pdev, 0x001b,
 		    "BAR 3 not enabled.\n");
@@ -1709,7 +1855,6 @@ static int
 qla83xx_iospace_config(struct qla_hw_data *ha)
 {
 	uint16_t msix;
-	int cpus;
 
 	if (pci_request_selected_regions(ha->pdev, ha->bars,
 	    QLA2XXX_DRIVER_NAME)) {
@@ -1761,32 +1906,36 @@ qla83xx_iospace_config(struct qla_hw_data *ha)
 		/* Read MSIX vector size of the board */
 		pci_read_config_word(ha->pdev,
 		    QLA_83XX_PCI_MSIX_CONTROL, &msix);
-		ha->msix_count = msix;
-		/* Max queues are bounded by available msix vectors */
-		/* queue 0 uses two msix vectors */
-		if (ql2xmultique_tag) {
-			cpus = num_online_cpus();
-			ha->max_rsp_queues = (ha->msix_count - 1 > cpus) ?
-				(cpus + 1) : (ha->msix_count - 1);
-			ha->max_req_queues = 2;
-		} else if (ql2xmaxqueues > 1) {
-			ha->max_req_queues = ql2xmaxqueues > QLA_MQ_SIZE ?
-						QLA_MQ_SIZE : ql2xmaxqueues;
-			ql_dbg_pci(ql_dbg_multiq, ha->pdev, 0xc00c,
-			    "QoS mode set, max no of request queues:%d.\n",
-			    ha->max_req_queues);
-			ql_dbg_pci(ql_dbg_init, ha->pdev, 0x011b,
-			    "QoS mode set, max no of request queues:%d.\n",
-			    ha->max_req_queues);
+		ha->msix_count = msix + 1;
+		/*
+		 * By default, driver uses at least two msix vectors
+		 * (default & rspq)
+		 */
+		if (ql2xmqsupport) {
+			/* MB interrupt uses 1 vector */
+			ha->max_req_queues = ha->msix_count - 1;
+			ha->max_rsp_queues = ha->max_req_queues;
+
+			/* ATIOQ needs 1 vector. That's 1 less QPair */
+			if (QLA_TGT_MODE_ENABLED())
+				ha->max_req_queues--;
+
+			/* Queue pairs is the max value minus
+			 * the base queue pair */
+			ha->max_qpairs = ha->max_req_queues - 1;
+			ql_dbg_pci(ql_dbg_init, ha->pdev, 0x0190,
+			    "Max no of queues pairs: %d.\n", ha->max_qpairs);
 		}
 		ql_log_pci(ql_log_info, ha->pdev, 0x011c,
-		    "MSI-X vector count: %d.\n", msix);
+		    "MSI-X vector count: %d.\n", ha->msix_count);
 	} else
 		ql_log_pci(ql_log_info, ha->pdev, 0x011e,
 		    "BAR 1 not enabled.\n");
 
 mqiobase_exit:
 	ha->msix_count = ha->max_rsp_queues + 1;
+	if (QLA_TGT_MODE_ENABLED())
+		ha->msix_count++;
 
 	qlt_83xx_iospace_config(ha);
 
@@ -1831,6 +1980,7 @@ static struct isp_operations qla2100_isp_ops = {
 	.write_optrom		= qla2x00_write_optrom_data,
 	.get_flash_version	= qla2x00_get_flash_version,
 	.start_scsi		= qla2x00_start_scsi,
+	.start_scsi_mq          = NULL,
 	.abort_isp		= qla2x00_abort_isp,
 	.iospace_config     	= qla2x00_iospace_config,
 	.initialize_adapter	= qla2x00_initialize_adapter,
@@ -1869,6 +2019,7 @@ static struct isp_operations qla2300_isp_ops = {
 	.write_optrom		= qla2x00_write_optrom_data,
 	.get_flash_version	= qla2x00_get_flash_version,
 	.start_scsi		= qla2x00_start_scsi,
+	.start_scsi_mq          = NULL,
 	.abort_isp		= qla2x00_abort_isp,
 	.iospace_config		= qla2x00_iospace_config,
 	.initialize_adapter	= qla2x00_initialize_adapter,
@@ -1907,6 +2058,7 @@ static struct isp_operations qla24xx_isp_ops = {
 	.write_optrom		= qla24xx_write_optrom_data,
 	.get_flash_version	= qla24xx_get_flash_version,
 	.start_scsi		= qla24xx_start_scsi,
+	.start_scsi_mq          = NULL,
 	.abort_isp		= qla2x00_abort_isp,
 	.iospace_config		= qla2x00_iospace_config,
 	.initialize_adapter	= qla2x00_initialize_adapter,
@@ -1945,6 +2097,7 @@ static struct isp_operations qla25xx_isp_ops = {
 	.write_optrom		= qla24xx_write_optrom_data,
 	.get_flash_version	= qla24xx_get_flash_version,
 	.start_scsi		= qla24xx_dif_start_scsi,
+	.start_scsi_mq          = qla2xxx_dif_start_scsi_mq,
 	.abort_isp		= qla2x00_abort_isp,
 	.iospace_config		= qla2x00_iospace_config,
 	.initialize_adapter	= qla2x00_initialize_adapter,
@@ -1983,6 +2136,7 @@ static struct isp_operations qla81xx_isp_ops = {
 	.write_optrom		= qla24xx_write_optrom_data,
 	.get_flash_version	= qla24xx_get_flash_version,
 	.start_scsi		= qla24xx_dif_start_scsi,
+	.start_scsi_mq          = qla2xxx_dif_start_scsi_mq,
 	.abort_isp		= qla2x00_abort_isp,
 	.iospace_config		= qla2x00_iospace_config,
 	.initialize_adapter	= qla2x00_initialize_adapter,
@@ -2021,6 +2175,7 @@ static struct isp_operations qla82xx_isp_ops = {
 	.write_optrom		= qla82xx_write_optrom_data,
 	.get_flash_version	= qla82xx_get_flash_version,
 	.start_scsi             = qla82xx_start_scsi,
+	.start_scsi_mq          = NULL,
 	.abort_isp		= qla82xx_abort_isp,
 	.iospace_config     	= qla82xx_iospace_config,
 	.initialize_adapter	= qla2x00_initialize_adapter,
@@ -2059,6 +2214,7 @@ static struct isp_operations qla8044_isp_ops = {
 	.write_optrom		= qla8044_write_optrom_data,
 	.get_flash_version	= qla82xx_get_flash_version,
 	.start_scsi             = qla82xx_start_scsi,
+	.start_scsi_mq          = NULL,
 	.abort_isp		= qla8044_abort_isp,
 	.iospace_config		= qla82xx_iospace_config,
 	.initialize_adapter	= qla2x00_initialize_adapter,
@@ -2097,6 +2253,7 @@ static struct isp_operations qla83xx_isp_ops = {
 	.write_optrom		= qla24xx_write_optrom_data,
 	.get_flash_version	= qla24xx_get_flash_version,
 	.start_scsi		= qla24xx_dif_start_scsi,
+	.start_scsi_mq          = qla2xxx_dif_start_scsi_mq,
 	.abort_isp		= qla2x00_abort_isp,
 	.iospace_config		= qla83xx_iospace_config,
 	.initialize_adapter	= qla2x00_initialize_adapter,
@@ -2135,6 +2292,7 @@ static struct isp_operations qlafx00_isp_ops = {
 	.write_optrom		= qla24xx_write_optrom_data,
 	.get_flash_version	= qla24xx_get_flash_version,
 	.start_scsi		= qlafx00_start_scsi,
+	.start_scsi_mq          = NULL,
 	.abort_isp		= qlafx00_abort_isp,
 	.iospace_config		= qlafx00_iospace_config,
 	.initialize_adapter	= qlafx00_initialize_adapter,
@@ -2173,6 +2331,7 @@ static struct isp_operations qla27xx_isp_ops = {
 	.write_optrom		= qla24xx_write_optrom_data,
 	.get_flash_version	= qla24xx_get_flash_version,
 	.start_scsi		= qla24xx_dif_start_scsi,
+	.start_scsi_mq          = qla2xxx_dif_start_scsi_mq,
 	.abort_isp		= qla2x00_abort_isp,
 	.iospace_config		= qla83xx_iospace_config,
 	.initialize_adapter	= qla2x00_initialize_adapter,
@@ -2387,6 +2546,8 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	uint16_t req_length = 0, rsp_length = 0;
 	struct req_que *req = NULL;
 	struct rsp_que *rsp = NULL;
+	int i;
+
 	bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
 	sht = &qla2xxx_driver_template;
 	if (pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2422 ||
@@ -2650,6 +2811,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	    "Found an ISP%04X irq %d iobase 0x%p.\n",
 	    pdev->device, pdev->irq, ha->iobase);
 	mutex_init(&ha->vport_lock);
+	mutex_init(&ha->mq_lock);
 	init_completion(&ha->mbx_cmd_comp);
 	complete(&ha->mbx_cmd_comp);
 	init_completion(&ha->mbx_intr_comp);
@@ -2737,7 +2899,11 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	    host->max_cmd_len, host->max_channel, host->max_lun,
 	    host->transportt, sht->vendor_id);
 
-que_init:
+	/* Set up the irqs */
+	ret = qla2x00_request_irqs(ha, rsp);
+	if (ret)
+		goto probe_init_failed;
+
 	/* Alloc arrays of request and response ring ptrs */
 	if (!qla2x00_alloc_queues(ha, req, rsp)) {
 		ql_log(ql_log_fatal, base_vha, 0x003d,
@@ -2746,12 +2912,17 @@ que_init:
 		goto probe_init_failed;
 	}
 
-	qlt_probe_one_stage1(base_vha, ha);
+	if (ha->mqenable && shost_use_blk_mq(host)) {
+		/* number of hardware queues supported by blk/scsi-mq*/
+		host->nr_hw_queues = ha->max_qpairs;
 
-	/* Set up the irqs */
-	ret = qla2x00_request_irqs(ha, rsp);
-	if (ret)
-		goto probe_init_failed;
+		ql_dbg(ql_dbg_init, base_vha, 0x0192,
+			"blk/scsi-mq enabled, HW queues = %d.\n", host->nr_hw_queues);
+	} else
+		ql_dbg(ql_dbg_init, base_vha, 0x0193,
+			"blk/scsi-mq disabled.\n");
+
+	qlt_probe_one_stage1(base_vha, ha);
 
 	pci_save_state(pdev);
 
@@ -2842,11 +3013,12 @@ que_init:
 	    host->can_queue, base_vha->req,
 	    base_vha->mgmt_svr_loop_id, host->sg_tablesize);
 
-	if (ha->mqenable) {
-		if (qla25xx_setup_mode(base_vha)) {
-			ql_log(ql_log_warn, base_vha, 0x00ec,
-			    "Failed to create queues, falling back to single queue mode.\n");
-			goto que_init;
+	if (ha->mqenable && qla_ini_mode_enabled(base_vha)) {
+		ha->wq = alloc_workqueue("qla2xxx_wq", WQ_MEM_RECLAIM, 1);
+		/* Create start of day qpairs for Block MQ */
+		if (shost_use_blk_mq(host)) {
+			for (i = 0; i < ha->max_qpairs; i++)
+				qla2xxx_create_qpair(base_vha, 5, 0);
 		}
 	}
 
@@ -3115,13 +3287,6 @@ qla2x00_delete_all_vps(struct qla_hw_data *ha, scsi_qla_host_t *base_vha)
 static void
 qla2x00_destroy_deferred_work(struct qla_hw_data *ha)
 {
-	/* Flush the work queue and remove it */
-	if (ha->wq) {
-		flush_workqueue(ha->wq);
-		destroy_workqueue(ha->wq);
-		ha->wq = NULL;
-	}
-
 	/* Cancel all work and destroy DPC workqueues */
 	if (ha->dpc_lp_wq) {
 		cancel_work_sync(&ha->idc_aen);
@@ -3317,9 +3482,17 @@ qla2x00_free_device(scsi_qla_host_t *vha)
 		ha->isp_ops->disable_intrs(ha);
 	}
 
+	qla2x00_free_fcports(vha);
+
 	qla2x00_free_irqs(vha);
 
-	qla2x00_free_fcports(vha);
+	/* Flush the work queue and remove it */
+	if (ha->wq) {
+		flush_workqueue(ha->wq);
+		destroy_workqueue(ha->wq);
+		ha->wq = NULL;
+	}
+
 
 	qla2x00_mem_free(ha);
 
@@ -4034,6 +4207,7 @@ struct scsi_qla_host *qla2x00_create_host(struct scsi_host_template *sht,
 	INIT_LIST_HEAD(&vha->qla_sess_op_cmd_list);
 	INIT_LIST_HEAD(&vha->logo_list);
 	INIT_LIST_HEAD(&vha->plogi_ack_list);
+	INIT_LIST_HEAD(&vha->qp_list);
 
 	spin_lock_init(&vha->work_lock);
 	spin_lock_init(&vha->cmd_list_lock);
@@ -5038,8 +5212,8 @@ qla2x00_disable_board_on_pci_error(struct work_struct *work)
 
 	base_vha->flags.init_done = 0;
 	qla25xx_delete_queues(base_vha);
-	qla2x00_free_irqs(base_vha);
 	qla2x00_free_fcports(base_vha);
+	qla2x00_free_irqs(base_vha);
 	qla2x00_mem_free(ha);
 	qla82xx_md_free(base_vha);
 	qla2x00_free_queues(ha);
@@ -5073,6 +5247,8 @@ qla2x00_do_dpc(void *data)
 {
 	scsi_qla_host_t *base_vha;
 	struct qla_hw_data *ha;
+	uint32_t online;
+	struct qla_qpair *qpair;
 
 	ha = (struct qla_hw_data *)data;
 	base_vha = pci_get_drvdata(ha->pdev);
@@ -5334,6 +5510,22 @@ intr_on_check:
 				ha->isp_ops->beacon_blink(base_vha);
 		}
 
+		/* qpair online check */
+		if (test_and_clear_bit(QPAIR_ONLINE_CHECK_NEEDED,
+		    &base_vha->dpc_flags)) {
+			if (ha->flags.eeh_busy ||
+			    ha->flags.pci_channel_io_perm_failure)
+				online = 0;
+			else
+				online = 1;
+
+			mutex_lock(&ha->mq_lock);
+			list_for_each_entry(qpair, &base_vha->qp_list,
+			    qp_list_elem)
+			qpair->online = online;
+			mutex_unlock(&ha->mq_lock);
+		}
+
 		if (!IS_QLAFX00(ha))
 			qla2x00_do_dpc_all_vps(base_vha);
 
@@ -5676,6 +5868,10 @@ qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
 	switch (state) {
 	case pci_channel_io_normal:
 		ha->flags.eeh_busy = 0;
+		if (ql2xmqsupport) {
+			set_bit(QPAIR_ONLINE_CHECK_NEEDED, &vha->dpc_flags);
+			qla2xxx_wake_dpc(vha);
+		}
 		return PCI_ERS_RESULT_CAN_RECOVER;
 	case pci_channel_io_frozen:
 		ha->flags.eeh_busy = 1;
@@ -5689,10 +5885,18 @@ qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
 		pci_disable_device(pdev);
 		/* Return back all IOs */
 		qla2x00_abort_all_cmds(vha, DID_RESET << 16);
+		if (ql2xmqsupport) {
+			set_bit(QPAIR_ONLINE_CHECK_NEEDED, &vha->dpc_flags);
+			qla2xxx_wake_dpc(vha);
+		}
 		return PCI_ERS_RESULT_NEED_RESET;
 	case pci_channel_io_perm_failure:
 		ha->flags.pci_channel_io_perm_failure = 1;
 		qla2x00_abort_all_cmds(vha, DID_NO_CONNECT << 16);
+		if (ql2xmqsupport) {
+			set_bit(QPAIR_ONLINE_CHECK_NEEDED, &vha->dpc_flags);
+			qla2xxx_wake_dpc(vha);
+		}
 		return PCI_ERS_RESULT_DISCONNECT;
 	}
 	return PCI_ERS_RESULT_NEED_RESET;
@@ -5960,6 +6164,13 @@ qla83xx_disable_laser(scsi_qla_host_t *vha)
 	qla83xx_wr_reg(vha, reg, data);
 }
 
+static int qla2xxx_map_queues(struct Scsi_Host *shost)
+{
+	scsi_qla_host_t *vha = (scsi_qla_host_t *)shost->hostdata;
+
+	return blk_mq_pci_map_queues(&shost->tag_set, vha->hw->pdev);
+}
+
 static const struct pci_error_handlers qla2xxx_err_handler = {
 	.error_detected = qla2xxx_pci_error_detected,
 	.mmio_enabled = qla2xxx_pci_mmio_enabled,

drivers/scsi/scsi_sysfs.c

@@ -1204,10 +1204,6 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
 	struct request_queue *rq = sdev->request_queue;
 	struct scsi_target *starget = sdev->sdev_target;
 
-	error = scsi_device_set_state(sdev, SDEV_RUNNING);
-	if (error)
-		return error;
-
 	error = scsi_target_add(starget);
 	if (error)
 		return error;

drivers/scsi/ufs/ufs-qcom.c

@@ -23,6 +23,7 @@
 #include "unipro.h"
 #include "ufs-qcom.h"
 #include "ufshci.h"
+#include "ufs_quirks.h"
 #define UFS_QCOM_DEFAULT_DBG_PRINT_EN	\
 	(UFS_QCOM_DBG_PRINT_REGS_EN | UFS_QCOM_DBG_PRINT_TEST_BUS_EN)
 
@@ -1031,6 +1032,34 @@ out:
 	return ret;
 }
 
+static int ufs_qcom_quirk_host_pa_saveconfigtime(struct ufs_hba *hba)
+{
+	int err;
+	u32 pa_vs_config_reg1;
+
+	err = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_VS_CONFIG_REG1),
+			     &pa_vs_config_reg1);
+	if (err)
+		goto out;
+
+	/* Allow extension of MSB bits of PA_SaveConfigTime attribute */
+	err = ufshcd_dme_set(hba, UIC_ARG_MIB(PA_VS_CONFIG_REG1),
+			    (pa_vs_config_reg1 | (1 << 12)));
+
+out:
+	return err;
+}
+
+static int ufs_qcom_apply_dev_quirks(struct ufs_hba *hba)
+{
+	int err = 0;
+
+	if (hba->dev_quirks & UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME)
+		err = ufs_qcom_quirk_host_pa_saveconfigtime(hba);
+
+	return err;
+}
+
 static u32 ufs_qcom_get_ufs_hci_version(struct ufs_hba *hba)
 {
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
@@ -1194,7 +1223,16 @@ static int ufs_qcom_init(struct ufs_hba *hba)
 	 */
 	host->generic_phy = devm_phy_get(dev, "ufsphy");
 
-	if (IS_ERR(host->generic_phy)) {
+	if (host->generic_phy == ERR_PTR(-EPROBE_DEFER)) {
+		/*
+		 * UFS driver might be probed before the phy driver does.
+		 * In that case we would like to return EPROBE_DEFER code.
+		 */
+		err = -EPROBE_DEFER;
+		dev_warn(dev, "%s: required phy device. hasn't probed yet. err = %d\n",
+			__func__, err);
+		goto out_variant_clear;
+	} else if (IS_ERR(host->generic_phy)) {
 		err = PTR_ERR(host->generic_phy);
 		dev_err(dev, "%s: PHY get failed %d\n", __func__, err);
 		goto out_variant_clear;
@@ -1432,7 +1470,8 @@ static void ufs_qcom_print_hw_debug_reg_all(struct ufs_hba *hba,
 	reg = ufs_qcom_get_debug_reg_offset(host, UFS_UFS_DBG_RD_PRDT_RAM);
 	print_fn(hba, reg, 64, "UFS_UFS_DBG_RD_PRDT_RAM ", priv);
 
-	ufshcd_writel(hba, (reg & ~UFS_BIT(17)), REG_UFS_CFG1);
+	/* clear bit 17 - UTP_DBG_RAMS_EN */
+	ufshcd_rmwl(hba, UFS_BIT(17), 0, REG_UFS_CFG1);
 
 	reg = ufs_qcom_get_debug_reg_offset(host, UFS_DBG_RD_REG_UAWM);
 	print_fn(hba, reg, 4, "UFS_DBG_RD_REG_UAWM ", priv);
@@ -1609,6 +1648,7 @@ static struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
 	.hce_enable_notify      = ufs_qcom_hce_enable_notify,
 	.link_startup_notify    = ufs_qcom_link_startup_notify,
 	.pwr_change_notify	= ufs_qcom_pwr_change_notify,
+	.apply_dev_quirks	= ufs_qcom_apply_dev_quirks,
 	.suspend		= ufs_qcom_suspend,
 	.resume			= ufs_qcom_resume,
 	.dbg_register_dump	= ufs_qcom_dump_dbg_regs,

drivers/scsi/ufs/ufs-qcom.h

@@ -142,6 +142,7 @@ enum ufs_qcom_phy_init_type {
 	 UFS_QCOM_DBG_PRINT_TEST_BUS_EN)
 
 /* QUniPro Vendor specific attributes */
+#define PA_VS_CONFIG_REG1	0x9000
 #define DME_VS_CORE_CLK_CTRL	0xD002
 /* bit and mask definitions for DME_VS_CORE_CLK_CTRL attribute */
 #define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT		BIT(8)

drivers/scsi/ufs/ufs_quirks.h

@@ -134,29 +134,17 @@ struct ufs_dev_fix {
  */
 #define UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE	(1 << 7)
 
+/*
+ * The max. value PA_SaveConfigTime is 250 (10us) but this is not enough for
+ * some vendors.
+ * Gear switch from PWM to HS may fail even with this max. PA_SaveConfigTime.
+ * Gear switch can be issued by host controller as an error recovery and any
+ * software delay will not help on this case so we need to increase
+ * PA_SaveConfigTime to >32us as per vendor recommendation.
+ */
+#define UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME	(1 << 8)
 
 struct ufs_hba;
 void ufs_advertise_fixup_device(struct ufs_hba *hba);
 
-static struct ufs_dev_fix ufs_fixups[] = {
-	/* UFS cards deviations table */
-	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
-		UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM),
-	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL, UFS_DEVICE_NO_VCCQ),
-	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
-		UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS),
-	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
-		UFS_DEVICE_NO_FASTAUTO),
-	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
-		UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE),
-	UFS_FIX(UFS_VENDOR_TOSHIBA, UFS_ANY_MODEL,
-		UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM),
-	UFS_FIX(UFS_VENDOR_TOSHIBA, "THGLF2G9C8KBADG",
-		UFS_DEVICE_QUIRK_PA_TACTIVATE),
-	UFS_FIX(UFS_VENDOR_TOSHIBA, "THGLF2G9D8KBADG",
-		UFS_DEVICE_QUIRK_PA_TACTIVATE),
-	UFS_FIX(UFS_VENDOR_SKHYNIX, UFS_ANY_MODEL, UFS_DEVICE_NO_VCCQ),
-
-	END_FIX
-};
 #endif /* UFS_QUIRKS_H_ */

drivers/scsi/ufs/ufshcd.c

@@ -185,6 +185,30 @@ ufs_get_pm_lvl_to_link_pwr_state(enum ufs_pm_level lvl)
 	return ufs_pm_lvl_states[lvl].link_state;
 }
 
+static struct ufs_dev_fix ufs_fixups[] = {
+	/* UFS cards deviations table */
+	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
+		UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM),
+	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL, UFS_DEVICE_NO_VCCQ),
+	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
+		UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS),
+	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
+		UFS_DEVICE_NO_FASTAUTO),
+	UFS_FIX(UFS_VENDOR_SAMSUNG, UFS_ANY_MODEL,
+		UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE),
+	UFS_FIX(UFS_VENDOR_TOSHIBA, UFS_ANY_MODEL,
+		UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM),
+	UFS_FIX(UFS_VENDOR_TOSHIBA, "THGLF2G9C8KBADG",
+		UFS_DEVICE_QUIRK_PA_TACTIVATE),
+	UFS_FIX(UFS_VENDOR_TOSHIBA, "THGLF2G9D8KBADG",
+		UFS_DEVICE_QUIRK_PA_TACTIVATE),
+	UFS_FIX(UFS_VENDOR_SKHYNIX, UFS_ANY_MODEL, UFS_DEVICE_NO_VCCQ),
+	UFS_FIX(UFS_VENDOR_SKHYNIX, UFS_ANY_MODEL,
+		UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME),
+
+	END_FIX
+};
+
 static void ufshcd_tmc_handler(struct ufs_hba *hba);
 static void ufshcd_async_scan(void *data, async_cookie_t cookie);
 static int ufshcd_reset_and_restore(struct ufs_hba *hba);
@@ -288,10 +312,24 @@ int ufshcd_wait_for_register(struct ufs_hba *hba, u32 reg, u32 mask,
  */
 static inline u32 ufshcd_get_intr_mask(struct ufs_hba *hba)
 {
-	if (hba->ufs_version == UFSHCI_VERSION_10)
-		return INTERRUPT_MASK_ALL_VER_10;
-	else
-		return INTERRUPT_MASK_ALL_VER_11;
+	u32 intr_mask = 0;
+
+	switch (hba->ufs_version) {
+	case UFSHCI_VERSION_10:
+		intr_mask = INTERRUPT_MASK_ALL_VER_10;
+		break;
+	/* allow fall through */
+	case UFSHCI_VERSION_11:
+	case UFSHCI_VERSION_20:
+		intr_mask = INTERRUPT_MASK_ALL_VER_11;
+		break;
+	/* allow fall through */
+	case UFSHCI_VERSION_21:
+	default:
+		intr_mask = INTERRUPT_MASK_ALL_VER_21;
+	}
+
+	return intr_mask;
 }
 
 /**
@@ -5199,6 +5237,8 @@ static void ufshcd_tune_unipro_params(struct ufs_hba *hba)
 
 	if (hba->dev_quirks & UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE)
 		ufshcd_quirk_tune_host_pa_tactivate(hba);
+
+	ufshcd_vops_apply_dev_quirks(hba);
 }
 
 /**
@@ -6667,6 +6707,13 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 	/* Get UFS version supported by the controller */
 	hba->ufs_version = ufshcd_get_ufs_version(hba);
 
+	if ((hba->ufs_version != UFSHCI_VERSION_10) &&
+	    (hba->ufs_version != UFSHCI_VERSION_11) &&
+	    (hba->ufs_version != UFSHCI_VERSION_20) &&
+	    (hba->ufs_version != UFSHCI_VERSION_21))
+		dev_err(hba->dev, "invalid UFS version 0x%x\n",
+			hba->ufs_version);
+
 	/* Get Interrupt bit mask per version */
 	hba->intr_mask = ufshcd_get_intr_mask(hba);
 

drivers/scsi/ufs/ufshcd.h

@@ -266,7 +266,7 @@ struct ufs_pwr_mode_info {
  * @setup_task_mgmt: called before any task management request is issued
  *                  to set some things
  * @hibern8_notify: called around hibern8 enter/exit
- *		    to configure some things
+ * @apply_dev_quirks: called to apply device specific quirks
  * @suspend: called during host controller PM callback
  * @resume: called during host controller PM callback
  * @dbg_register_dump: used to dump controller debug information
@@ -293,7 +293,8 @@ struct ufs_hba_variant_ops {
 	void	(*setup_xfer_req)(struct ufs_hba *, int, bool);
 	void	(*setup_task_mgmt)(struct ufs_hba *, int, u8);
 	void    (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
-				       enum ufs_notify_change_status);
+					enum ufs_notify_change_status);
+	int	(*apply_dev_quirks)(struct ufs_hba *);
 	int     (*suspend)(struct ufs_hba *, enum ufs_pm_op);
 	int     (*resume)(struct ufs_hba *, enum ufs_pm_op);
 	void	(*dbg_register_dump)(struct ufs_hba *hba);
@@ -839,6 +840,13 @@ static inline void ufshcd_vops_hibern8_notify(struct ufs_hba *hba,
 		return hba->vops->hibern8_notify(hba, cmd, status);
 }
 
+static inline int ufshcd_vops_apply_dev_quirks(struct ufs_hba *hba)
+{
+	if (hba->vops && hba->vops->apply_dev_quirks)
+		return hba->vops->apply_dev_quirks(hba);
+	return 0;
+}
+
 static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
 {
 	if (hba->vops && hba->vops->suspend)

drivers/scsi/ufs/ufshci.h

@@ -72,6 +72,10 @@ enum {
 	REG_UIC_COMMAND_ARG_1			= 0x94,
 	REG_UIC_COMMAND_ARG_2			= 0x98,
 	REG_UIC_COMMAND_ARG_3			= 0x9C,
+	REG_UFS_CCAP				= 0x100,
+	REG_UFS_CRYPTOCAP			= 0x104,
+
+	UFSHCI_CRYPTO_REG_SPACE_SIZE		= 0x400,
 };
 
 /* Controller capability masks */
@@ -275,6 +279,9 @@ enum {
 
 	/* Interrupt disable mask for UFSHCI v1.1 */
 	INTERRUPT_MASK_ALL_VER_11	= 0x31FFF,
+
+	/* Interrupt disable mask for UFSHCI v2.1 */
+	INTERRUPT_MASK_ALL_VER_21	= 0x71FFF,
 };
 
 /*