isci: uplevel request infrastructure

* Consolidate tiny header files
* Move files out of core/ (drop core/scic_sds_ prefix)
* Merge core/scic_sds_request.[ch] into request.[ch]
* Cleanup request.c namespace (clean forward declarations and global
  namespace pollution)

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/scsi/isci/Makefile

@@ -7,11 +7,9 @@ isci-objs := init.o phy.o request.o sata.o \
 	     remote_node_context.o \
 	     remote_node_table.o \
 	     unsolicited_frame_control.o \
-	     core/scic_sds_request.o \
-	     core/scic_sds_stp_request.o \
+	     stp_request.o \
+	     ssp_request.o \
+	     smp_request.o \
 	     core/scic_sds_port.o \
 	     core/scic_sds_port_configuration_agent.o \
 	     core/scic_sds_phy.o \
-	     core/scic_sds_ssp_request.o \
-	     core/scic_sds_smp_request.o \
-	     core/sci_util.o

drivers/scsi/isci/core/sci_util.c

@@ -1,86 +0,0 @@
-/*
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <linux/kernel.h>
-#include "sci_util.h"
-#include "request.h"
-
-void *scic_request_get_virt_addr(struct scic_sds_request *sci_req, dma_addr_t phys_addr)
-{
-	struct isci_request *ireq = sci_req_to_ireq(sci_req);
-	dma_addr_t offset;
-
-	BUG_ON(phys_addr < ireq->request_daddr);
-
-	offset = phys_addr - ireq->request_daddr;
-
-	BUG_ON(offset >= sizeof(*ireq));
-
-	return (char *)ireq + offset;
-}
-
-dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sds_request,
-					void *virt_addr)
-{
-	struct isci_request *isci_request = sci_req_to_ireq(sds_request);
-
-	char *requested_addr = (char *)virt_addr;
-	char *base_addr = (char *)isci_request;
-
-	BUG_ON(requested_addr < base_addr);
-	BUG_ON((requested_addr - base_addr) >= sizeof(*isci_request));
-
-	return isci_request->request_daddr + (requested_addr - base_addr);
-}

drivers/scsi/isci/core/sci_util.h

@@ -1,97 +0,0 @@
-/*
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _SCI_UTIL_H_
-#define _SCI_UTIL_H_
-
-#include "scic_sds_request.h"
-
-#define SCIC_BUILD_DWORD(char_buffer) \
-	(\
-		((char_buffer)[0] << 24) \
-		| ((char_buffer)[1] << 16) \
-		| ((char_buffer)[2] <<  8) \
-		| ((char_buffer)[3]) \
-	)
-
-#define sci_cb_make_physical_address(physical_addr, addr_upper, addr_lower) \
-	((physical_addr) = (addr_lower) | ((u64)addr_upper) << 32)
-
-/**
- * sci_swab32_cpy - convert between scsi and scu-hardware byte format
- * @dest: receive the 4-byte endian swapped version of src
- * @src: word aligned source buffer
- *
- * scu hardware handles SSP/SMP control, response, and unidentified
- * frames in "big endian dword" order.  Regardless of host endian this
- * is always a swab32()-per-dword conversion of the standard definition,
- * i.e. single byte fields swapped and multi-byte fields in little-
- * endian
- */
-static inline void sci_swab32_cpy(void *_dest, void *_src, ssize_t word_cnt)
-{
-	u32 *dest = _dest, *src = _src;
-
-	while (--word_cnt >= 0)
-		dest[word_cnt] = swab32(src[word_cnt]);
-}
-
-void *scic_request_get_virt_addr(struct scic_sds_request *sds_request,
-				 dma_addr_t phys_addr);
-
-dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sds_request,
-					void *virt_addr);
-
-#endif /* _SCI_UTIL_H_ */

drivers/scsi/isci/core/scic_io_request.h

@@ -1,226 +0,0 @@
-/*
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _SCIC_IO_REQUEST_H_
-#define _SCIC_IO_REQUEST_H_
-
-#include <linux/kernel.h>
-
-struct scic_sds_request;
-struct scic_sds_remote_device;
-struct scic_sds_controller;
-
-/**
- * This enumeration specifies the transport protocol utilized for the request.
- *
- *
- */
-typedef enum {
-	/**
-	 * This enumeration constant indicates that no protocol has yet been
-	 * set.
-	 */
-	SCIC_NO_PROTOCOL,
-
-	/**
-	 * This enumeration constant indicates that the protocol utilized
-	 * is the Serial Management Protocol.
-	 */
-	SCIC_SMP_PROTOCOL,
-
-	/**
-	 * This enumeration constant indicates that the protocol utilized
-	 * is the Serial SCSI Protocol.
-	 */
-	SCIC_SSP_PROTOCOL,
-
-	/**
-	 * This enumeration constant indicates that the protocol utilized
-	 * is the Serial-ATA Tunneling Protocol.
-	 */
-	SCIC_STP_PROTOCOL
-
-} SCIC_TRANSPORT_PROTOCOL;
-
-enum sci_status scic_io_request_construct(
-	struct scic_sds_controller *scic_controller,
-	struct scic_sds_remote_device *scic_remote_device,
-	u16 io_tag, struct scic_sds_request *sci_req);
-
-/**
- * scic_io_request_construct_basic_ssp() - This method is called by the SCI
- *    user to build an SSP IO request.
- * @scic_io_request: This parameter specifies the handle to the io request
- *    object to be built.
- *
- * - The user must have previously called scic_io_request_construct() on the
- * supplied IO request. Indicate if the controller successfully built the IO
- * request. SCI_SUCCESS This value is returned if the IO request was
- * successfully built. SCI_FAILURE_UNSUPPORTED_PROTOCOL This value is returned
- * if the remote_device does not support the SSP protocol.
- * SCI_FAILURE_INVALID_ASSOCIATION This value is returned if the user did not
- * properly set the association between the SCIC IO request and the user's IO
- * request.
- */
-enum sci_status scic_io_request_construct_basic_ssp(
-	struct scic_sds_request *scic_io_request);
-
-
-
-
-
-/**
- * scic_io_request_construct_basic_sata() - This method is called by the SCI
- *    Core user to build an STP IO request.
- * @scic_io_request: This parameter specifies the handle to the io request
- *    object to be built.
- *
- * - The user must have previously called scic_io_request_construct() on the
- * supplied IO request. Indicate if the controller successfully built the IO
- * request. SCI_SUCCESS This value is returned if the IO request was
- * successfully built. SCI_FAILURE_UNSUPPORTED_PROTOCOL This value is returned
- * if the remote_device does not support the STP protocol.
- * SCI_FAILURE_INVALID_ASSOCIATION This value is returned if the user did not
- * properly set the association between the SCIC IO request and the user's IO
- * request.
- */
-enum sci_status scic_io_request_construct_basic_sata(
-	struct scic_sds_request *scic_io_request);
-
-
-
-
-/**
- * scic_io_request_construct_smp() - This method is called by the SCI user to
- *    build an SMP IO request.
- * @scic_io_request: This parameter specifies the handle to the io request
- *    object to be built.
- *
- * - The user must have previously called scic_io_request_construct() on the
- * supplied IO request. Indicate if the controller successfully built the IO
- * request. SCI_SUCCESS This value is returned if the IO request was
- * successfully built. SCI_FAILURE_UNSUPPORTED_PROTOCOL This value is returned
- * if the remote_device does not support the SMP protocol.
- * SCI_FAILURE_INVALID_ASSOCIATION This value is returned if the user did not
- * properly set the association between the SCIC IO request and the user's IO
- * request.
- */
-enum sci_status scic_io_request_construct_smp(
-	struct scic_sds_request *scic_io_request);
-
-
-
-/**
- * scic_request_get_controller_status() - This method returns the controller
- *    specific IO/Task request status. These status values are unique to the
- *    specific controller being managed by the SCIC.
- * @io_request: the handle to the IO or task management request object for
- *    which to retrieve the status.
- *
- * This method returns a value indicating the controller specific request
- * status.
- */
-u32 scic_request_get_controller_status(
-	struct scic_sds_request *io_request);
-
-/**
- * scic_io_request_get_io_tag() - This method will return the IO tag utilized
- *    by the IO request.
- * @scic_io_request: This parameter specifies the handle to the io request
- *    object for which to return the IO tag.
- *
- * An unsigned integer representing the IO tag being utilized.
- * SCI_CONTROLLER_INVALID_IO_TAG This value is returned if the IO does not
- * currently have an IO tag allocated to it. All return other values indicate a
- * legitimate tag.
- */
-u16 scic_io_request_get_io_tag(
-	struct scic_sds_request *scic_io_request);
-
-
-/**
- * scic_stp_io_request_set_ncq_tag() - This method will assign an NCQ tag to
- *    the io request object.  The caller of this function must make sure that
- *    only valid NCQ tags are assigned to the io request object.
- * @scic_io_request: This parameter specifies the handle to the io request
- *    object to which to assign the ncq tag.
- * @ncq_tag: This parameter specifies the NCQ tag to be utilized for the
- *    supplied core IO request.  It is up to the user to make sure that this is
- *    a valid NCQ tag.
- *
- * none This function is only valid for SATA NCQ requests.
- */
-void scic_stp_io_request_set_ncq_tag(
-	struct scic_sds_request *scic_io_request,
-	u16 ncq_tag);
-
-/**
- * scic_io_request_get_number_of_bytes_transferred() - This method will return
- *    the number of bytes transferred from the SCU
- * @scic_io_request: This parameter specifies the handle to the io request
- *    whose data length was not eqaul to the data length specified in the
- *    request. When the driver gets an early io completion status from the
- *    hardware, this routine should be called to get the actual number of bytes
- *    transferred
- *
- * The return is the number of bytes transferred when the data legth is not
- * equal to the specified length in the io request
- */
-u32 scic_io_request_get_number_of_bytes_transferred(
-	struct scic_sds_request *scic_io_request);
-
-
-#endif  /* _SCIC_IO_REQUEST_H_ */
-

drivers/scsi/isci/core/scic_sds_phy.c

@@ -61,7 +61,6 @@
 #include "scic_sds_phy.h"
 #include "scic_sds_port.h"
 #include "remote_node_context.h"
-#include "sci_util.h"
 #include "scu_event_codes.h"
 #include "timers.h"
 

drivers/scsi/isci/core/scic_sds_port.c

@@ -60,9 +60,9 @@
 #include "scic_sds_port.h"
 #include "remote_device.h"
 #include "remote_node_context.h"
-#include "scic_sds_request.h"
 #include "registers.h"
 #include "timers.h"
+#include "scu_task_context.h"
 
 #define SCIC_SDS_PORT_MIN_TIMER_COUNT  (SCI_MAX_PORTS)
 #define SCIC_SDS_PORT_MAX_TIMER_COUNT  (SCI_MAX_PORTS)

drivers/scsi/isci/core/scic_sds_request.c

@@ -1,1523 +0,0 @@
-/*
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <scsi/sas.h>
-#include "scic_io_request.h"
-#include "registers.h"
-#include "scic_sds_port.h"
-#include "remote_device.h"
-#include "scic_sds_request.h"
-#include "scic_sds_smp_request.h"
-#include "scic_sds_stp_request.h"
-#include "unsolicited_frame_control.h"
-#include "sci_util.h"
-#include "scu_completion_codes.h"
-#include "scu_task_context.h"
-#include "request.h"
-#include "task.h"
-
-/*
- * ****************************************************************************
- * * SCIC SDS IO REQUEST CONSTANTS
- * **************************************************************************** */
-
-/**
- *
- *
- * We have no timer requirements for IO requests right now
- */
-#define SCIC_SDS_IO_REQUEST_MINIMUM_TIMER_COUNT (0)
-#define SCIC_SDS_IO_REQUEST_MAXIMUM_TIMER_COUNT (0)
-
-/**
- * This method returns the sgl element pair for the specificed sgl_pair index.
- * @sci_req: This parameter specifies the IO request for which to retrieve
- *    the Scatter-Gather List element pair.
- * @sgl_pair_index: This parameter specifies the index into the SGL element
- *    pair to be retrieved.
- *
- * This method returns a pointer to an struct scu_sgl_element_pair.
- */
-static struct scu_sgl_element_pair *scic_sds_request_get_sgl_element_pair(
-	struct scic_sds_request *sci_req,
-	u32 sgl_pair_index
-	) {
-	struct scu_task_context *task_context;
-
-	task_context = (struct scu_task_context *)sci_req->task_context_buffer;
-
-	if (sgl_pair_index == 0) {
-		return &task_context->sgl_pair_ab;
-	} else if (sgl_pair_index == 1) {
-		return &task_context->sgl_pair_cd;
-	}
-
-	return &sci_req->sg_table[sgl_pair_index - 2];
-}
-
-/**
- * This function will build the SGL list for an IO request.
- * @sci_req: This parameter specifies the IO request for which to build
- *    the Scatter-Gather List.
- *
- */
-void scic_sds_request_build_sgl(struct scic_sds_request *sds_request)
-{
-	struct isci_request *isci_request = sci_req_to_ireq(sds_request);
-	struct isci_host *isci_host = isci_request->isci_host;
-	struct sas_task *task = isci_request_access_task(isci_request);
-	struct scatterlist *sg = NULL;
-	dma_addr_t dma_addr;
-	u32 sg_idx = 0;
-	struct scu_sgl_element_pair *scu_sg   = NULL;
-	struct scu_sgl_element_pair *prev_sg  = NULL;
-
-	if (task->num_scatter > 0) {
-		sg = task->scatter;
-
-		while (sg) {
-			scu_sg = scic_sds_request_get_sgl_element_pair(
-					sds_request,
-					sg_idx);
-
-			SCU_SGL_COPY(scu_sg->A, sg);
-
-			sg = sg_next(sg);
-
-			if (sg) {
-				SCU_SGL_COPY(scu_sg->B, sg);
-				sg = sg_next(sg);
-			} else
-				SCU_SGL_ZERO(scu_sg->B);
-
-			if (prev_sg) {
-				dma_addr =
-					scic_io_request_get_dma_addr(
-							sds_request,
-							scu_sg);
-
-				prev_sg->next_pair_upper =
-					upper_32_bits(dma_addr);
-				prev_sg->next_pair_lower =
-					lower_32_bits(dma_addr);
-			}
-
-			prev_sg = scu_sg;
-			sg_idx++;
-		}
-	} else {	/* handle when no sg */
-		scu_sg = scic_sds_request_get_sgl_element_pair(sds_request,
-							       sg_idx);
-
-		dma_addr = dma_map_single(&isci_host->pdev->dev,
-					  task->scatter,
-					  task->total_xfer_len,
-					  task->data_dir);
-
-		isci_request->zero_scatter_daddr = dma_addr;
-
-		scu_sg->A.length = task->total_xfer_len;
-		scu_sg->A.address_upper = upper_32_bits(dma_addr);
-		scu_sg->A.address_lower = lower_32_bits(dma_addr);
-	}
-
-	if (scu_sg) {
-		scu_sg->next_pair_upper = 0;
-		scu_sg->next_pair_lower = 0;
-	}
-}
-
-static void scic_sds_ssp_io_request_assign_buffers(struct scic_sds_request *sci_req)
-{
-	if (sci_req->was_tag_assigned_by_user == false)
-		sci_req->task_context_buffer = &sci_req->tc;
-}
-
-static void scic_sds_io_request_build_ssp_command_iu(struct scic_sds_request *sci_req)
-{
-	struct ssp_cmd_iu *cmd_iu;
-	struct isci_request *ireq = sci_req_to_ireq(sci_req);
-	struct sas_task *task = isci_request_access_task(ireq);
-
-	cmd_iu = &sci_req->ssp.cmd;
-
-	memcpy(cmd_iu->LUN, task->ssp_task.LUN, 8);
-	cmd_iu->add_cdb_len = 0;
-	cmd_iu->_r_a = 0;
-	cmd_iu->_r_b = 0;
-	cmd_iu->en_fburst = 0; /* unsupported */
-	cmd_iu->task_prio = task->ssp_task.task_prio;
-	cmd_iu->task_attr = task->ssp_task.task_attr;
-	cmd_iu->_r_c = 0;
-
-	sci_swab32_cpy(&cmd_iu->cdb, task->ssp_task.cdb,
-		       sizeof(task->ssp_task.cdb) / sizeof(u32));
-}
-
-static void scic_sds_task_request_build_ssp_task_iu(struct scic_sds_request *sci_req)
-{
-	struct ssp_task_iu *task_iu;
-	struct isci_request *ireq = sci_req_to_ireq(sci_req);
-	struct sas_task *task = isci_request_access_task(ireq);
-	struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq);
-
-	task_iu = &sci_req->ssp.tmf;
-
-	memset(task_iu, 0, sizeof(struct ssp_task_iu));
-
-	memcpy(task_iu->LUN, task->ssp_task.LUN, 8);
-
-	task_iu->task_func = isci_tmf->tmf_code;
-	task_iu->task_tag =
-		(ireq->ttype == tmf_task) ?
-		isci_tmf->io_tag :
-		SCI_CONTROLLER_INVALID_IO_TAG;
-}
-
-/**
- * This method is will fill in the SCU Task Context for any type of SSP request.
- * @sci_req:
- * @task_context:
- *
- */
-static void scu_ssp_reqeust_construct_task_context(
-	struct scic_sds_request *sds_request,
-	struct scu_task_context *task_context)
-{
-	dma_addr_t dma_addr;
-	struct scic_sds_controller *controller;
-	struct scic_sds_remote_device *target_device;
-	struct scic_sds_port *target_port;
-
-	controller = scic_sds_request_get_controller(sds_request);
-	target_device = scic_sds_request_get_device(sds_request);
-	target_port = scic_sds_request_get_port(sds_request);
-
-	/* Fill in the TC with the its required data */
-	task_context->abort = 0;
-	task_context->priority = 0;
-	task_context->initiator_request = 1;
-	task_context->connection_rate = target_device->connection_rate;
-	task_context->protocol_engine_index =
-		scic_sds_controller_get_protocol_engine_group(controller);
-	task_context->logical_port_index =
-		scic_sds_port_get_index(target_port);
-	task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
-	task_context->valid = SCU_TASK_CONTEXT_VALID;
-	task_context->context_type = SCU_TASK_CONTEXT_TYPE;
-
-	task_context->remote_node_index =
-		scic_sds_remote_device_get_index(sds_request->target_device);
-	task_context->command_code = 0;
-
-	task_context->link_layer_control = 0;
-	task_context->do_not_dma_ssp_good_response = 1;
-	task_context->strict_ordering = 0;
-	task_context->control_frame = 0;
-	task_context->timeout_enable = 0;
-	task_context->block_guard_enable = 0;
-
-	task_context->address_modifier = 0;
-
-	/* task_context->type.ssp.tag = sci_req->io_tag; */
-	task_context->task_phase = 0x01;
-
-	if (sds_request->was_tag_assigned_by_user) {
-		/*
-		 * Build the task context now since we have already read
-		 * the data
-		 */
-		sds_request->post_context =
-			(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
-			 (scic_sds_controller_get_protocol_engine_group(
-							controller) <<
-			  SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
-			 (scic_sds_port_get_index(target_port) <<
-			  SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
-			 scic_sds_io_tag_get_index(sds_request->io_tag));
-	} else {
-		/*
-		 * Build the task context now since we have already read
-		 * the data
-		 *
-		 * I/O tag index is not assigned because we have to wait
-		 * until we get a TCi
-		 */
-		sds_request->post_context =
-			(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
-			 (scic_sds_controller_get_protocol_engine_group(
-							owning_controller) <<
-			  SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
-			 (scic_sds_port_get_index(target_port) <<
-			  SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
-	}
-
-	/*
-	 * Copy the physical address for the command buffer to the
-	 * SCU Task Context
-	 */
-	dma_addr = scic_io_request_get_dma_addr(sds_request,
-						&sds_request->ssp.cmd);
-
-	task_context->command_iu_upper = upper_32_bits(dma_addr);
-	task_context->command_iu_lower = lower_32_bits(dma_addr);
-
-	/*
-	 * Copy the physical address for the response buffer to the
-	 * SCU Task Context
-	 */
-	dma_addr = scic_io_request_get_dma_addr(sds_request,
-						&sds_request->ssp.rsp);
-
-	task_context->response_iu_upper = upper_32_bits(dma_addr);
-	task_context->response_iu_lower = lower_32_bits(dma_addr);
-}
-
-/**
- * This method is will fill in the SCU Task Context for a SSP IO request.
- * @sci_req:
- *
- */
-static void scu_ssp_io_request_construct_task_context(
-	struct scic_sds_request *sci_req,
-	enum dma_data_direction dir,
-	u32 len)
-{
-	struct scu_task_context *task_context;
-
-	task_context = scic_sds_request_get_task_context(sci_req);
-
-	scu_ssp_reqeust_construct_task_context(sci_req, task_context);
-
-	task_context->ssp_command_iu_length =
-		sizeof(struct ssp_cmd_iu) / sizeof(u32);
-	task_context->type.ssp.frame_type = SSP_COMMAND;
-
-	switch (dir) {
-	case DMA_FROM_DEVICE:
-	case DMA_NONE:
-	default:
-		task_context->task_type = SCU_TASK_TYPE_IOREAD;
-		break;
-	case DMA_TO_DEVICE:
-		task_context->task_type = SCU_TASK_TYPE_IOWRITE;
-		break;
-	}
-
-	task_context->transfer_length_bytes = len;
-
-	if (task_context->transfer_length_bytes > 0)
-		scic_sds_request_build_sgl(sci_req);
-}
-
-static void scic_sds_ssp_task_request_assign_buffers(struct scic_sds_request *sci_req)
-{
-	if (sci_req->was_tag_assigned_by_user == false)
-		sci_req->task_context_buffer = &sci_req->tc;
-}
-
-/**
- * This method will fill in the SCU Task Context for a SSP Task request.  The
- *    following important settings are utilized: -# priority ==
- *    SCU_TASK_PRIORITY_HIGH.  This ensures that the task request is issued
- *    ahead of other task destined for the same Remote Node. -# task_type ==
- *    SCU_TASK_TYPE_IOREAD.  This simply indicates that a normal request type
- *    (i.e. non-raw frame) is being utilized to perform task management. -#
- *    control_frame == 1.  This ensures that the proper endianess is set so
- *    that the bytes are transmitted in the right order for a task frame.
- * @sci_req: This parameter specifies the task request object being
- *    constructed.
- *
- */
-static void scu_ssp_task_request_construct_task_context(
-	struct scic_sds_request *sci_req)
-{
-	struct scu_task_context *task_context;
-
-	task_context = scic_sds_request_get_task_context(sci_req);
-
-	scu_ssp_reqeust_construct_task_context(sci_req, task_context);
-
-	task_context->control_frame                = 1;
-	task_context->priority                     = SCU_TASK_PRIORITY_HIGH;
-	task_context->task_type                    = SCU_TASK_TYPE_RAW_FRAME;
-	task_context->transfer_length_bytes        = 0;
-	task_context->type.ssp.frame_type          = SSP_TASK;
-	task_context->ssp_command_iu_length =
-		sizeof(struct ssp_task_iu) / sizeof(u32);
-}
-
-
-/**
- * This method constructs the SSP Command IU data for this ssp passthrough
- *    comand request object.
- * @sci_req: This parameter specifies the request object for which the SSP
- *    command information unit is being built.
- *
- * enum sci_status, returns invalid parameter is cdb > 16
- */
-
-
-/**
- * This method constructs the SATA request object.
- * @sci_req:
- * @sat_protocol:
- * @transfer_length:
- * @data_direction:
- * @copy_rx_frame:
- *
- * enum sci_status
- */
-static enum sci_status
-scic_io_request_construct_sata(struct scic_sds_request *sci_req,
-			       u32 len,
-			       enum dma_data_direction dir,
-			       bool copy)
-{
-	enum sci_status status = SCI_SUCCESS;
-	struct isci_request *ireq = sci_req_to_ireq(sci_req);
-	struct sas_task *task = isci_request_access_task(ireq);
-
-	/* check for management protocols */
-	if (ireq->ttype == tmf_task) {
-		struct isci_tmf *tmf = isci_request_access_tmf(ireq);
-
-		if (tmf->tmf_code == isci_tmf_sata_srst_high ||
-		    tmf->tmf_code == isci_tmf_sata_srst_low)
-			return scic_sds_stp_soft_reset_request_construct(sci_req);
-		else {
-			dev_err(scic_to_dev(sci_req->owning_controller),
-				"%s: Request 0x%p received un-handled SAT "
-				"management protocol 0x%x.\n",
-				__func__, sci_req, tmf->tmf_code);
-
-			return SCI_FAILURE;
-		}
-	}
-
-	if (!sas_protocol_ata(task->task_proto)) {
-		dev_err(scic_to_dev(sci_req->owning_controller),
-			"%s: Non-ATA protocol in SATA path: 0x%x\n",
-			__func__,
-			task->task_proto);
-		return SCI_FAILURE;
-
-	}
-
-	/* non data */
-	if (task->data_dir == DMA_NONE)
-		return scic_sds_stp_non_data_request_construct(sci_req);
-
-	/* NCQ */
-	if (task->ata_task.use_ncq)
-		return scic_sds_stp_ncq_request_construct(sci_req, len, dir);
-
-	/* DMA */
-	if (task->ata_task.dma_xfer)
-		return scic_sds_stp_udma_request_construct(sci_req, len, dir);
-	else /* PIO */
-		return scic_sds_stp_pio_request_construct(sci_req, copy);
-
-	return status;
-}
-
-enum sci_status scic_io_request_construct_basic_ssp(
-	struct scic_sds_request *sci_req)
-{
-	struct isci_request *ireq = sci_req_to_ireq(sci_req);
-	struct sas_task *task = isci_request_access_task(ireq);
-
-	sci_req->protocol = SCIC_SSP_PROTOCOL;
-
-	scu_ssp_io_request_construct_task_context(sci_req,
-						  task->data_dir,
-						  task->total_xfer_len);
-
-	scic_sds_io_request_build_ssp_command_iu(sci_req);
-
-	sci_base_state_machine_change_state(
-			&sci_req->state_machine,
-			SCI_BASE_REQUEST_STATE_CONSTRUCTED);
-
-	return SCI_SUCCESS;
-}
-
-
-enum sci_status scic_task_request_construct_ssp(
-	struct scic_sds_request *sci_req)
-{
-	/* Construct the SSP Task SCU Task Context */
-	scu_ssp_task_request_construct_task_context(sci_req);
-
-	/* Fill in the SSP Task IU */
-	scic_sds_task_request_build_ssp_task_iu(sci_req);
-
-	sci_base_state_machine_change_state(&sci_req->state_machine,
-		SCI_BASE_REQUEST_STATE_CONSTRUCTED);
-
-	return SCI_SUCCESS;
-}
-
-
-enum sci_status scic_io_request_construct_basic_sata(
-		struct scic_sds_request *sci_req)
-{
-	enum sci_status status;
-	struct scic_sds_stp_request *stp_req;
-	bool copy = false;
-	struct isci_request *isci_request = sci_req_to_ireq(sci_req);
-	struct sas_task *task = isci_request_access_task(isci_request);
-
-	stp_req = &sci_req->stp.req;
-	sci_req->protocol = SCIC_STP_PROTOCOL;
-
-	copy = (task->data_dir == DMA_NONE) ? false : true;
-
-	status = scic_io_request_construct_sata(sci_req,
-						task->total_xfer_len,
-						task->data_dir,
-						copy);
-
-	if (status == SCI_SUCCESS)
-		sci_base_state_machine_change_state(&sci_req->state_machine,
-			SCI_BASE_REQUEST_STATE_CONSTRUCTED);
-
-	return status;
-}
-
-
-enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req)
-{
-	enum sci_status status = SCI_SUCCESS;
-	struct isci_request *ireq = sci_req_to_ireq(sci_req);
-
-	/* check for management protocols */
-	if (ireq->ttype == tmf_task) {
-		struct isci_tmf *tmf = isci_request_access_tmf(ireq);
-
-		if (tmf->tmf_code == isci_tmf_sata_srst_high ||
-		    tmf->tmf_code == isci_tmf_sata_srst_low) {
-			status = scic_sds_stp_soft_reset_request_construct(sci_req);
-		} else {
-			dev_err(scic_to_dev(sci_req->owning_controller),
-				"%s: Request 0x%p received un-handled SAT "
-				"Protocol 0x%x.\n",
-				__func__, sci_req, tmf->tmf_code);
-
-			return SCI_FAILURE;
-		}
-	}
-
-	if (status == SCI_SUCCESS)
-		sci_base_state_machine_change_state(
-				&sci_req->state_machine,
-				SCI_BASE_REQUEST_STATE_CONSTRUCTED);
-
-	return status;
-}
-
-
-u16 scic_io_request_get_io_tag(
-	struct scic_sds_request *sci_req)
-{
-	return sci_req->io_tag;
-}
-
-
-u32 scic_request_get_controller_status(
-	struct scic_sds_request *sci_req)
-{
-	return sci_req->scu_status;
-}
-
-#define SCU_TASK_CONTEXT_SRAM 0x200000
-u32 scic_io_request_get_number_of_bytes_transferred(
-	struct scic_sds_request *scic_sds_request)
-{
-	struct scic_sds_controller *scic = scic_sds_request->owning_controller;
-	u32 ret_val = 0;
-
-	if (readl(&scic->smu_registers->address_modifier) == 0) {
-		void __iomem *scu_reg_base = scic->scu_registers;
-		/*
-		 * get the bytes of data from the Address == BAR1 + 20002Ch + (256*TCi) where
-		 *   BAR1 is the scu_registers
-		 *   0x20002C = 0x200000 + 0x2c
-		 *            = start of task context SRAM + offset of (type.ssp.data_offset)
-		 *   TCi is the io_tag of struct scic_sds_request */
-		ret_val = readl(scu_reg_base +
-				(SCU_TASK_CONTEXT_SRAM + offsetof(struct scu_task_context, type.ssp.data_offset)) +
-				((sizeof(struct scu_task_context)) * scic_sds_io_tag_get_index(scic_sds_request->io_tag)));
-	}
-
-	return ret_val;
-}
-
-
-/*
- * ****************************************************************************
- * * SCIC SDS Interface Implementation
- * **************************************************************************** */
-
-enum sci_status
-scic_sds_request_start(struct scic_sds_request *request)
-{
-	if (request->device_sequence !=
-	    scic_sds_remote_device_get_sequence(request->target_device))
-		return SCI_FAILURE;
-
-	if (request->state_handlers->start_handler)
-		return request->state_handlers->start_handler(request);
-
-	dev_warn(scic_to_dev(request->owning_controller),
-		 "%s: SCIC IO Request requested to start while in wrong "
-		 "state %d\n",
-		 __func__,
-		 sci_base_state_machine_get_state(&request->state_machine));
-
-	return SCI_FAILURE_INVALID_STATE;
-}
-
-enum sci_status
-scic_sds_io_request_terminate(struct scic_sds_request *request)
-{
-	if (request->state_handlers->abort_handler)
-		return request->state_handlers->abort_handler(request);
-
-	dev_warn(scic_to_dev(request->owning_controller),
-		"%s: SCIC IO Request requested to abort while in wrong "
-		"state %d\n",
-		__func__,
-		sci_base_state_machine_get_state(&request->state_machine));
-
-	return SCI_FAILURE_INVALID_STATE;
-}
-
-enum sci_status
-scic_sds_io_request_complete(struct scic_sds_request *request)
-{
-	if (request->state_handlers->complete_handler)
-		return request->state_handlers->complete_handler(request);
-
-	dev_warn(scic_to_dev(request->owning_controller),
-		"%s: SCIC IO Request requested to complete while in wrong "
-		"state %d\n",
-		__func__,
-		sci_base_state_machine_get_state(&request->state_machine));
-
-	return SCI_FAILURE_INVALID_STATE;
-}
-
-enum sci_status scic_sds_io_request_event_handler(
-	struct scic_sds_request *request,
-	u32 event_code)
-{
-	if (request->state_handlers->event_handler)
-		return request->state_handlers->event_handler(request, event_code);
-
-	dev_warn(scic_to_dev(request->owning_controller),
-		 "%s: SCIC IO Request given event code notification %x while "
-		 "in wrong state %d\n",
-		 __func__,
-		 event_code,
-		 sci_base_state_machine_get_state(&request->state_machine));
-
-	return SCI_FAILURE_INVALID_STATE;
-}
-
-enum sci_status
-scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completion_code)
-{
-	if (request->state_machine.current_state_id == SCI_BASE_REQUEST_STATE_STARTED &&
-	    request->has_started_substate_machine == false)
-		return scic_sds_request_started_state_tc_completion_handler(request, completion_code);
-	else if (request->state_handlers->tc_completion_handler)
-		return request->state_handlers->tc_completion_handler(request, completion_code);
-
-	dev_warn(scic_to_dev(request->owning_controller),
-		"%s: SCIC IO Request given task completion notification %x "
-		"while in wrong state %d\n",
-		__func__,
-		completion_code,
-		sci_base_state_machine_get_state(&request->state_machine));
-
-	return SCI_FAILURE_INVALID_STATE;
-
-}
-
-
-/**
- *
- * @sci_req: The SCIC_SDS_IO_REQUEST_T object for which the start
- *    operation is to be executed.
- * @frame_index: The frame index returned by the hardware for the reqeust
- *    object.
- *
- * This method invokes the core state frame handler for the
- * SCIC_SDS_IO_REQUEST_T object. enum sci_status
- */
-enum sci_status scic_sds_io_request_frame_handler(
-	struct scic_sds_request *request,
-	u32 frame_index)
-{
-	if (request->state_handlers->frame_handler)
-		return request->state_handlers->frame_handler(request, frame_index);
-
-	dev_warn(scic_to_dev(request->owning_controller),
-		 "%s: SCIC IO Request given unexpected frame %x while in "
-		 "state %d\n",
-		 __func__,
-		 frame_index,
-		 sci_base_state_machine_get_state(&request->state_machine));
-
-	scic_sds_controller_release_frame(request->owning_controller, frame_index);
-	return SCI_FAILURE_INVALID_STATE;
-}
-
-/*
- * This function copies response data for requests returning response data
- *    instead of sense data.
- * @sci_req: This parameter specifies the request object for which to copy
- *    the response data.
- */
-void scic_sds_io_request_copy_response(struct scic_sds_request *sci_req)
-{
-	void *resp_buf;
-	u32 len;
-	struct ssp_response_iu *ssp_response;
-	struct isci_request *ireq = sci_req_to_ireq(sci_req);
-	struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq);
-
-	ssp_response = &sci_req->ssp.rsp;
-
-	resp_buf = &isci_tmf->resp.resp_iu;
-
-	len = min_t(u32,
-		    SSP_RESP_IU_MAX_SIZE,
-		    be32_to_cpu(ssp_response->response_data_len));
-
-	memcpy(resp_buf, ssp_response->resp_data, len);
-}
-
-/*
- * *****************************************************************************
- * *  CONSTRUCTED STATE HANDLERS
- * ***************************************************************************** */
-
-/*
- * This method implements the action taken when a constructed
- * SCIC_SDS_IO_REQUEST_T object receives a scic_sds_request_start() request.
- * This method will, if necessary, allocate a TCi for the io request object and
- * then will, if necessary, copy the constructed TC data into the actual TC
- * buffer.  If everything is successful the post context field is updated with
- * the TCi so the controller can post the request to the hardware. enum sci_status
- * SCI_SUCCESS SCI_FAILURE_INSUFFICIENT_RESOURCES
- */
-static enum sci_status scic_sds_request_constructed_state_start_handler(
-	struct scic_sds_request *request)
-{
-	struct scu_task_context *task_context;
-
-	if (request->io_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
-		request->io_tag =
-			scic_controller_allocate_io_tag(request->owning_controller);
-	}
-
-	/* Record the IO Tag in the request */
-	if (request->io_tag != SCI_CONTROLLER_INVALID_IO_TAG) {
-		task_context = request->task_context_buffer;
-
-		task_context->task_index = scic_sds_io_tag_get_index(request->io_tag);
-
-		switch (task_context->protocol_type) {
-		case SCU_TASK_CONTEXT_PROTOCOL_SMP:
-		case SCU_TASK_CONTEXT_PROTOCOL_SSP:
-			/* SSP/SMP Frame */
-			task_context->type.ssp.tag = request->io_tag;
-			task_context->type.ssp.target_port_transfer_tag = 0xFFFF;
-			break;
-
-		case SCU_TASK_CONTEXT_PROTOCOL_STP:
-			/*
-			 * STP/SATA Frame
-			 * task_context->type.stp.ncq_tag = request->ncq_tag; */
-			break;
-
-		case SCU_TASK_CONTEXT_PROTOCOL_NONE:
-			/* / @todo When do we set no protocol type? */
-			break;
-
-		default:
-			/* This should never happen since we build the IO requests */
-			break;
-		}
-
-		/*
-		 * Check to see if we need to copy the task context buffer
-		 * or have been building into the task context buffer */
-		if (request->was_tag_assigned_by_user == false) {
-			scic_sds_controller_copy_task_context(
-				request->owning_controller, request);
-		}
-
-		/* Add to the post_context the io tag value */
-		request->post_context |= scic_sds_io_tag_get_index(request->io_tag);
-
-		/* Everything is good go ahead and change state */
-		sci_base_state_machine_change_state(&request->state_machine,
-			SCI_BASE_REQUEST_STATE_STARTED);
-
-		return SCI_SUCCESS;
-	}
-
-	return SCI_FAILURE_INSUFFICIENT_RESOURCES;
-}
-
-/*
- * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
- * object receives a scic_sds_request_terminate() request. Since the request
- * has not yet been posted to the hardware the request transitions to the
- * completed state. enum sci_status SCI_SUCCESS
- */
-static enum sci_status scic_sds_request_constructed_state_abort_handler(
-	struct scic_sds_request *request)
-{
-	/*
-	 * This request has been terminated by the user make sure that the correct
-	 * status code is returned */
-	scic_sds_request_set_status(request,
-		SCU_TASK_DONE_TASK_ABORT,
-		SCI_FAILURE_IO_TERMINATED);
-
-	sci_base_state_machine_change_state(&request->state_machine,
-		SCI_BASE_REQUEST_STATE_COMPLETED);
-	return SCI_SUCCESS;
-}
-
-/*
- * *****************************************************************************
- * *  STARTED STATE HANDLERS
- * ***************************************************************************** */
-
-/*
- * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
- * object receives a scic_sds_request_terminate() request. Since the request
- * has been posted to the hardware the io request state is changed to the
- * aborting state. enum sci_status SCI_SUCCESS
- */
-enum sci_status scic_sds_request_started_state_abort_handler(
-	struct scic_sds_request *request)
-{
-	if (request->has_started_substate_machine)
-		sci_base_state_machine_stop(&request->started_substate_machine);
-
-	sci_base_state_machine_change_state(&request->state_machine,
-		SCI_BASE_REQUEST_STATE_ABORTING);
-	return SCI_SUCCESS;
-}
-
-/*
- * scic_sds_request_started_state_tc_completion_handler() - This method process
- *    TC (task context) completions for normal IO request (i.e. Task/Abort
- *    Completions of type 0).  This method will update the
- *    SCIC_SDS_IO_REQUEST_T::status field.
- * @sci_req: This parameter specifies the request for which a completion
- *    occurred.
- * @completion_code: This parameter specifies the completion code received from
- *    the SCU.
- *
- */
-enum sci_status
-scic_sds_request_started_state_tc_completion_handler(
-		struct scic_sds_request *sci_req,
-		u32 completion_code)
-{
-	u8 datapres;
-	struct ssp_response_iu *resp_iu;
-
-	/*
-	 * TODO: Any SDMA return code of other than 0 is bad
-	 *       decode 0x003C0000 to determine SDMA status
-	 */
-	switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
-		scic_sds_request_set_status(sci_req,
-					    SCU_TASK_DONE_GOOD,
-					    SCI_SUCCESS);
-		break;
-
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EARLY_RESP):
-	{
-		/*
-		 * There are times when the SCU hardware will return an early
-		 * response because the io request specified more data than is
-		 * returned by the target device (mode pages, inquiry data,
-		 * etc.).  We must check the response stats to see if this is
-		 * truly a failed request or a good request that just got
-		 * completed early.
-		 */
-		struct ssp_response_iu *resp = &sci_req->ssp.rsp;
-		ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
-
-		sci_swab32_cpy(&sci_req->ssp.rsp,
-			       &sci_req->ssp.rsp,
-			       word_cnt);
-
-		if (resp->status == 0) {
-			scic_sds_request_set_status(
-				sci_req,
-				SCU_TASK_DONE_GOOD,
-				SCI_SUCCESS_IO_DONE_EARLY);
-		} else {
-			scic_sds_request_set_status(
-				sci_req,
-				SCU_TASK_DONE_CHECK_RESPONSE,
-				SCI_FAILURE_IO_RESPONSE_VALID);
-		}
-	}
-	break;
-
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CHECK_RESPONSE):
-	{
-		ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
-
-		sci_swab32_cpy(&sci_req->ssp.rsp,
-			       &sci_req->ssp.rsp,
-			       word_cnt);
-
-		scic_sds_request_set_status(sci_req,
-					    SCU_TASK_DONE_CHECK_RESPONSE,
-					    SCI_FAILURE_IO_RESPONSE_VALID);
-		break;
-	}
-
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RESP_LEN_ERR):
-		/*
-		 * / @todo With TASK_DONE_RESP_LEN_ERR is the response frame
-		 * guaranteed to be received before this completion status is
-		 * posted?
-		 */
-		resp_iu = &sci_req->ssp.rsp;
-		datapres = resp_iu->datapres;
-
-		if ((datapres == 0x01) || (datapres == 0x02)) {
-			scic_sds_request_set_status(
-				sci_req,
-				SCU_TASK_DONE_CHECK_RESPONSE,
-				SCI_FAILURE_IO_RESPONSE_VALID);
-		} else
-			scic_sds_request_set_status(
-				sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS);
-		break;
-
-	/* only stp device gets suspended. */
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_PERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_DATA_LEN_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_ABORT_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_WD_LEN):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_RESP):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_SDBFIS):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_REG_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDB_ERR):
-		if (sci_req->protocol == SCIC_STP_PROTOCOL) {
-			scic_sds_request_set_status(
-				sci_req,
-				SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
-				SCU_COMPLETION_TL_STATUS_SHIFT,
-				SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED);
-		} else {
-			scic_sds_request_set_status(
-				sci_req,
-				SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
-				SCU_COMPLETION_TL_STATUS_SHIFT,
-				SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
-		}
-		break;
-
-	/* both stp/ssp device gets suspended */
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LF_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_WRONG_DESTINATION):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_BAD_DESTINATION):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_ZONE_VIOLATION):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED):
-		scic_sds_request_set_status(
-			sci_req,
-			SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
-			SCU_COMPLETION_TL_STATUS_SHIFT,
-			SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED);
-		break;
-
-	/* neither ssp nor stp gets suspended. */
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_CMD_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_XR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_IU_LEN_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDMA_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OFFSET_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EXCESS_DATA):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_DATA):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OPEN_FAIL):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_VIIT_ENTRY_NV):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_IIT_ENTRY_NV):
-	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RNCNV_OUTBOUND):
-	default:
-		scic_sds_request_set_status(
-			sci_req,
-			SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
-			SCU_COMPLETION_TL_STATUS_SHIFT,
-			SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
-		break;
-	}
-
-	/*
-	 * TODO: This is probably wrong for ACK/NAK timeout conditions
-	 */
-
-	/* In all cases we will treat this as the completion of the IO req. */
-	sci_base_state_machine_change_state(
-			&sci_req->state_machine,
-			SCI_BASE_REQUEST_STATE_COMPLETED);
-	return SCI_SUCCESS;
-}
-
-/*
- * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
- * object receives a scic_sds_request_frame_handler() request. This method
- * first determines the frame type received.  If this is a response frame then
- * the response data is copied to the io request response buffer for processing
- * at completion time. If the frame type is not a response buffer an error is
- * logged. enum sci_status SCI_SUCCESS SCI_FAILURE_INVALID_PARAMETER_VALUE
- */
-static enum sci_status
-scic_sds_request_started_state_frame_handler(struct scic_sds_request *sci_req,
-					     u32 frame_index)
-{
-	enum sci_status status;
-	u32 *frame_header;
-	struct ssp_frame_hdr ssp_hdr;
-	ssize_t word_cnt;
-
-	status = scic_sds_unsolicited_frame_control_get_header(
-		&(scic_sds_request_get_controller(sci_req)->uf_control),
-		frame_index,
-		(void **)&frame_header);
-
-	word_cnt = sizeof(struct ssp_frame_hdr) / sizeof(u32);
-	sci_swab32_cpy(&ssp_hdr, frame_header, word_cnt);
-
-	if (ssp_hdr.frame_type == SSP_RESPONSE) {
-		struct ssp_response_iu *resp_iu;
-		ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
-
-		status = scic_sds_unsolicited_frame_control_get_buffer(
-			&(scic_sds_request_get_controller(sci_req)->uf_control),
-			frame_index,
-			(void **)&resp_iu);
-
-		sci_swab32_cpy(&sci_req->ssp.rsp,
-			       resp_iu, word_cnt);
-
-		resp_iu = &sci_req->ssp.rsp;
-
-		if ((resp_iu->datapres == 0x01) ||
-		    (resp_iu->datapres == 0x02)) {
-			scic_sds_request_set_status(
-				sci_req,
-				SCU_TASK_DONE_CHECK_RESPONSE,
-				SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
-		} else
-			scic_sds_request_set_status(
-				sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS);
-	} else {
-		/* This was not a response frame why did it get forwarded? */
-		dev_err(scic_to_dev(sci_req->owning_controller),
-			"%s: SCIC IO Request 0x%p received unexpected "
-			"frame %d type 0x%02x\n",
-			__func__,
-			sci_req,
-			frame_index,
-			ssp_hdr.frame_type);
-	}
-
-	/*
-	 * In any case we are done with this frame buffer return it to the
-	 * controller
-	 */
-	scic_sds_controller_release_frame(
-		sci_req->owning_controller, frame_index);
-
-	return SCI_SUCCESS;
-}
-
-/*
- * *****************************************************************************
- * *  COMPLETED STATE HANDLERS
- * ***************************************************************************** */
-
-
-/*
- * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
- * object receives a scic_sds_request_complete() request. This method frees up
- * any io request resources that have been allocated and transitions the
- * request to its final state. Consider stopping the state machine instead of
- * transitioning to the final state? enum sci_status SCI_SUCCESS
- */
-static enum sci_status scic_sds_request_completed_state_complete_handler(
-	struct scic_sds_request *request)
-{
-	if (request->was_tag_assigned_by_user != true) {
-		scic_controller_free_io_tag(
-			request->owning_controller, request->io_tag);
-	}
-
-	if (request->saved_rx_frame_index != SCU_INVALID_FRAME_INDEX) {
-		scic_sds_controller_release_frame(
-			request->owning_controller, request->saved_rx_frame_index);
-	}
-
-	sci_base_state_machine_change_state(&request->state_machine,
-		SCI_BASE_REQUEST_STATE_FINAL);
-	return SCI_SUCCESS;
-}
-
-/*
- * *****************************************************************************
- * *  ABORTING STATE HANDLERS
- * ***************************************************************************** */
-
-/*
- * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
- * object receives a scic_sds_request_terminate() request. This method is the
- * io request aborting state abort handlers.  On receipt of a multiple
- * terminate requests the io request will transition to the completed state.
- * This should not happen in normal operation. enum sci_status SCI_SUCCESS
- */
-static enum sci_status scic_sds_request_aborting_state_abort_handler(
-	struct scic_sds_request *request)
-{
-	sci_base_state_machine_change_state(&request->state_machine,
-		SCI_BASE_REQUEST_STATE_COMPLETED);
-	return SCI_SUCCESS;
-}
-
-/*
- * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
- * object receives a scic_sds_request_task_completion() request. This method
- * decodes the completion type waiting for the abort task complete
- * notification. When the abort task complete is received the io request
- * transitions to the completed state. enum sci_status SCI_SUCCESS
- */
-static enum sci_status scic_sds_request_aborting_state_tc_completion_handler(
-	struct scic_sds_request *sci_req,
-	u32 completion_code)
-{
-	switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
-	case (SCU_TASK_DONE_GOOD << SCU_COMPLETION_TL_STATUS_SHIFT):
-	case (SCU_TASK_DONE_TASK_ABORT << SCU_COMPLETION_TL_STATUS_SHIFT):
-		scic_sds_request_set_status(
-			sci_req, SCU_TASK_DONE_TASK_ABORT, SCI_FAILURE_IO_TERMINATED
-			);
-
-		sci_base_state_machine_change_state(&sci_req->state_machine,
-			SCI_BASE_REQUEST_STATE_COMPLETED);
-		break;
-
-	default:
-		/*
-		 * Unless we get some strange error wait for the task abort to complete
-		 * TODO: Should there be a state change for this completion? */
-		break;
-	}
-
-	return SCI_SUCCESS;
-}
-
-/*
- * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
- * object receives a scic_sds_request_frame_handler() request. This method
- * discards the unsolicited frame since we are waiting for the abort task
- * completion. enum sci_status SCI_SUCCESS
- */
-static enum sci_status scic_sds_request_aborting_state_frame_handler(
-	struct scic_sds_request *sci_req,
-	u32 frame_index)
-{
-	/* TODO: Is it even possible to get an unsolicited frame in the aborting state? */
-
-	scic_sds_controller_release_frame(
-		sci_req->owning_controller, frame_index);
-
-	return SCI_SUCCESS;
-}
-
-static const struct scic_sds_io_request_state_handler scic_sds_request_state_handler_table[] = {
-	[SCI_BASE_REQUEST_STATE_INITIAL] = {
-	},
-	[SCI_BASE_REQUEST_STATE_CONSTRUCTED] = {
-		.start_handler		= scic_sds_request_constructed_state_start_handler,
-		.abort_handler		= scic_sds_request_constructed_state_abort_handler,
-	},
-	[SCI_BASE_REQUEST_STATE_STARTED] = {
-		.abort_handler		= scic_sds_request_started_state_abort_handler,
-		.tc_completion_handler	= scic_sds_request_started_state_tc_completion_handler,
-		.frame_handler		= scic_sds_request_started_state_frame_handler,
-	},
-	[SCI_BASE_REQUEST_STATE_COMPLETED] = {
-		.complete_handler	= scic_sds_request_completed_state_complete_handler,
-	},
-	[SCI_BASE_REQUEST_STATE_ABORTING] = {
-		.abort_handler		= scic_sds_request_aborting_state_abort_handler,
-		.tc_completion_handler	= scic_sds_request_aborting_state_tc_completion_handler,
-		.frame_handler		= scic_sds_request_aborting_state_frame_handler,
-	},
-	[SCI_BASE_REQUEST_STATE_FINAL] = {
-	},
-};
-
-/**
- * scic_sds_request_initial_state_enter() -
- * @object: This parameter specifies the base object for which the state
- *    transition is occurring.
- *
- * This method implements the actions taken when entering the
- * SCI_BASE_REQUEST_STATE_INITIAL state. This state is entered when the initial
- * base request is constructed. Entry into the initial state sets all handlers
- * for the io request object to their default handlers. none
- */
-static void scic_sds_request_initial_state_enter(void *object)
-{
-	struct scic_sds_request *sci_req = object;
-
-	SET_STATE_HANDLER(
-		sci_req,
-		scic_sds_request_state_handler_table,
-		SCI_BASE_REQUEST_STATE_INITIAL
-		);
-}
-
-/**
- * scic_sds_request_constructed_state_enter() -
- * @object: The io request object that is to enter the constructed state.
- *
- * This method implements the actions taken when entering the
- * SCI_BASE_REQUEST_STATE_CONSTRUCTED state. The method sets the state handlers
- * for the the constructed state. none
- */
-static void scic_sds_request_constructed_state_enter(void *object)
-{
-	struct scic_sds_request *sci_req = object;
-
-	SET_STATE_HANDLER(
-		sci_req,
-		scic_sds_request_state_handler_table,
-		SCI_BASE_REQUEST_STATE_CONSTRUCTED
-		);
-}
-
-/**
- * scic_sds_request_started_state_enter() -
- * @object: This parameter specifies the base object for which the state
- *    transition is occurring.  This is cast into a SCIC_SDS_IO_REQUEST object.
- *
- * This method implements the actions taken when entering the
- * SCI_BASE_REQUEST_STATE_STARTED state. If the io request object type is a
- * SCSI Task request we must enter the started substate machine. none
- */
-static void scic_sds_request_started_state_enter(void *object)
-{
-	struct scic_sds_request *sci_req = object;
-
-	SET_STATE_HANDLER(
-		sci_req,
-		scic_sds_request_state_handler_table,
-		SCI_BASE_REQUEST_STATE_STARTED
-		);
-
-	/*
-	 * Most of the request state machines have a started substate machine so
-	 * start its execution on the entry to the started state. */
-	if (sci_req->has_started_substate_machine == true)
-		sci_base_state_machine_start(&sci_req->started_substate_machine);
-}
-
-/**
- * scic_sds_request_started_state_exit() -
- * @object: This parameter specifies the base object for which the state
- *    transition is occurring.  This object is cast into a SCIC_SDS_IO_REQUEST
- *    object.
- *
- * This method implements the actions taken when exiting the
- * SCI_BASE_REQUEST_STATE_STARTED state. For task requests the action will be
- * to stop the started substate machine. none
- */
-static void scic_sds_request_started_state_exit(void *object)
-{
-	struct scic_sds_request *sci_req = object;
-
-	if (sci_req->has_started_substate_machine == true)
-		sci_base_state_machine_stop(&sci_req->started_substate_machine);
-}
-
-/**
- * scic_sds_request_completed_state_enter() -
- * @object: This parameter specifies the base object for which the state
- *    transition is occurring.  This object is cast into a SCIC_SDS_IO_REQUEST
- *    object.
- *
- * This method implements the actions taken when entering the
- * SCI_BASE_REQUEST_STATE_COMPLETED state.  This state is entered when the
- * SCIC_SDS_IO_REQUEST has completed.  The method will decode the request
- * completion status and convert it to an enum sci_status to return in the
- * completion callback function. none
- */
-static void scic_sds_request_completed_state_enter(void *object)
-{
-	struct scic_sds_request *sci_req = object;
-	struct scic_sds_controller *scic =
-		scic_sds_request_get_controller(sci_req);
-	struct isci_host *ihost = scic_to_ihost(scic);
-	struct isci_request *ireq = sci_req_to_ireq(sci_req);
-
-	SET_STATE_HANDLER(sci_req,
-			  scic_sds_request_state_handler_table,
-			  SCI_BASE_REQUEST_STATE_COMPLETED);
-
-	/* Tell the SCI_USER that the IO request is complete */
-	if (sci_req->is_task_management_request == false)
-		isci_request_io_request_complete(ihost,
-						 ireq,
-						 sci_req->sci_status);
-	else
-		isci_task_request_complete(ihost, ireq, sci_req->sci_status);
-}
-
-/**
- * scic_sds_request_aborting_state_enter() -
- * @object: This parameter specifies the base object for which the state
- *    transition is occurring.  This object is cast into a SCIC_SDS_IO_REQUEST
- *    object.
- *
- * This method implements the actions taken when entering the
- * SCI_BASE_REQUEST_STATE_ABORTING state. none
- */
-static void scic_sds_request_aborting_state_enter(void *object)
-{
-	struct scic_sds_request *sci_req = object;
-
-	/* Setting the abort bit in the Task Context is required by the silicon. */
-	sci_req->task_context_buffer->abort = 1;
-
-	SET_STATE_HANDLER(
-		sci_req,
-		scic_sds_request_state_handler_table,
-		SCI_BASE_REQUEST_STATE_ABORTING
-		);
-}
-
-/**
- * scic_sds_request_final_state_enter() -
- * @object: This parameter specifies the base object for which the state
- *    transition is occurring.  This is cast into a SCIC_SDS_IO_REQUEST object.
- *
- * This method implements the actions taken when entering the
- * SCI_BASE_REQUEST_STATE_FINAL state. The only action required is to put the
- * state handlers in place. none
- */
-static void scic_sds_request_final_state_enter(void *object)
-{
-	struct scic_sds_request *sci_req = object;
-
-	SET_STATE_HANDLER(
-		sci_req,
-		scic_sds_request_state_handler_table,
-		SCI_BASE_REQUEST_STATE_FINAL
-		);
-}
-
-static const struct sci_base_state scic_sds_request_state_table[] = {
-	[SCI_BASE_REQUEST_STATE_INITIAL] = {
-		.enter_state = scic_sds_request_initial_state_enter,
-	},
-	[SCI_BASE_REQUEST_STATE_CONSTRUCTED] = {
-		.enter_state = scic_sds_request_constructed_state_enter,
-	},
-	[SCI_BASE_REQUEST_STATE_STARTED] = {
-		.enter_state = scic_sds_request_started_state_enter,
-		.exit_state  = scic_sds_request_started_state_exit
-	},
-	[SCI_BASE_REQUEST_STATE_COMPLETED] = {
-		.enter_state = scic_sds_request_completed_state_enter,
-	},
-	[SCI_BASE_REQUEST_STATE_ABORTING] = {
-		.enter_state = scic_sds_request_aborting_state_enter,
-	},
-	[SCI_BASE_REQUEST_STATE_FINAL] = {
-		.enter_state = scic_sds_request_final_state_enter,
-	},
-};
-
-static void scic_sds_general_request_construct(struct scic_sds_controller *scic,
-					       struct scic_sds_remote_device *sci_dev,
-					       u16 io_tag, struct scic_sds_request *sci_req)
-{
-	sci_base_state_machine_construct(&sci_req->state_machine, sci_req,
-			scic_sds_request_state_table, SCI_BASE_REQUEST_STATE_INITIAL);
-	sci_base_state_machine_start(&sci_req->state_machine);
-
-	sci_req->io_tag = io_tag;
-	sci_req->owning_controller = scic;
-	sci_req->target_device = sci_dev;
-	sci_req->has_started_substate_machine = false;
-	sci_req->protocol = SCIC_NO_PROTOCOL;
-	sci_req->saved_rx_frame_index = SCU_INVALID_FRAME_INDEX;
-	sci_req->device_sequence = scic_sds_remote_device_get_sequence(sci_dev);
-
-	sci_req->sci_status   = SCI_SUCCESS;
-	sci_req->scu_status   = 0;
-	sci_req->post_context = 0xFFFFFFFF;
-
-	sci_req->is_task_management_request = false;
-
-	if (io_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
-		sci_req->was_tag_assigned_by_user = false;
-		sci_req->task_context_buffer = NULL;
-	} else {
-		sci_req->was_tag_assigned_by_user = true;
-
-		sci_req->task_context_buffer =
-			scic_sds_controller_get_task_context_buffer(scic, io_tag);
-	}
-}
-
-enum sci_status
-scic_io_request_construct(struct scic_sds_controller *scic,
-			  struct scic_sds_remote_device *sci_dev,
-			  u16 io_tag, struct scic_sds_request *sci_req)
-{
-	struct domain_device *dev = sci_dev_to_domain(sci_dev);
-	enum sci_status status = SCI_SUCCESS;
-
-	/* Build the common part of the request */
-	scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req);
-
-	if (sci_dev->rnc.remote_node_index ==
-			SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
-		return SCI_FAILURE_INVALID_REMOTE_DEVICE;
-
-	if (dev->dev_type == SAS_END_DEV)
-		scic_sds_ssp_io_request_assign_buffers(sci_req);
-	else if ((dev->dev_type == SATA_DEV) ||
-		 (dev->tproto & SAS_PROTOCOL_STP)) {
-		scic_sds_stp_request_assign_buffers(sci_req);
-		memset(&sci_req->stp.cmd, 0, sizeof(sci_req->stp.cmd));
-	} else if (dev_is_expander(dev)) {
-		scic_sds_smp_request_assign_buffers(sci_req);
-		memset(&sci_req->smp.cmd, 0, sizeof(sci_req->smp.cmd));
-	} else
-		status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
-
-	if (status == SCI_SUCCESS) {
-		memset(sci_req->task_context_buffer, 0,
-		       offsetof(struct scu_task_context, sgl_pair_ab));
-	}
-
-	return status;
-}
-
-enum sci_status scic_task_request_construct(struct scic_sds_controller *scic,
-					    struct scic_sds_remote_device *sci_dev,
-					    u16 io_tag, struct scic_sds_request *sci_req)
-{
-	struct domain_device *dev = sci_dev_to_domain(sci_dev);
-	enum sci_status status = SCI_SUCCESS;
-
-	/* Build the common part of the request */
-	scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req);
-
-	if (dev->dev_type == SAS_END_DEV) {
-		scic_sds_ssp_task_request_assign_buffers(sci_req);
-
-		sci_req->has_started_substate_machine = true;
-
-		/* Construct the started sub-state machine. */
-		sci_base_state_machine_construct(
-			&sci_req->started_substate_machine,
-			sci_req,
-			scic_sds_io_request_started_task_mgmt_substate_table,
-			SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION
-			);
-	} else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))
-		scic_sds_stp_request_assign_buffers(sci_req);
-	else
-		status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
-
-	if (status == SCI_SUCCESS) {
-		sci_req->is_task_management_request = true;
-		memset(sci_req->task_context_buffer, 0, sizeof(struct scu_task_context));
-	}
-
-	return status;
-}

drivers/scsi/isci/core/scic_sds_request.h

@@ -1,491 +0,0 @@
-/*
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _SCIC_SDS_IO_REQUEST_H_
-#define _SCIC_SDS_IO_REQUEST_H_
-
-#include "isci.h"
-#include "scic_io_request.h"
-#include "state_machine.h"
-#include "scu_task_context.h"
-#include "scic_sds_stp_request.h"
-#include "sas.h"
-
-struct scic_sds_controller;
-struct scic_sds_remote_device;
-struct scic_sds_io_request_state_handler;
-
-/**
- * enum _scic_sds_io_request_started_task_mgmt_substates - This enumeration
- *    depicts all of the substates for a task management request to be
- *    performed in the STARTED super-state.
- *
- *
- */
-enum scic_sds_raw_request_started_task_mgmt_substates {
-	/**
-	 * The AWAIT_TC_COMPLETION sub-state indicates that the started raw
-	 * task management request is waiting for the transmission of the
-	 * initial frame (i.e. command, task, etc.).
-	 */
-	SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION,
-
-	/**
-	 * This sub-state indicates that the started task management request
-	 * is waiting for the reception of an unsolicited frame
-	 * (i.e. response IU).
-	 */
-	SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE,
-};
-
-
-/**
- * enum _scic_sds_smp_request_started_substates - This enumeration depicts all
- *    of the substates for a SMP request to be performed in the STARTED
- *    super-state.
- *
- *
- */
-enum scic_sds_smp_request_started_substates {
-	/**
-	 * This sub-state indicates that the started task management request
-	 * is waiting for the reception of an unsolicited frame
-	 * (i.e. response IU).
-	 */
-	SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE,
-
-	/**
-	 * The AWAIT_TC_COMPLETION sub-state indicates that the started SMP request is
-	 * waiting for the transmission of the initial frame (i.e. command, task, etc.).
-	 */
-	SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION,
-};
-
-struct scic_sds_request {
-	/**
-	 * This field contains the information for the base request state machine.
-	 */
-	struct sci_base_state_machine state_machine;
-
-	/**
-	 * This field simply points to the controller to which this IO request
-	 * is associated.
-	 */
-	struct scic_sds_controller *owning_controller;
-
-	/**
-	 * This field simply points to the remote device to which this IO request
-	 * is associated.
-	 */
-	struct scic_sds_remote_device *target_device;
-
-	/**
-	 * This field is utilized to determine if the SCI user is managing
-	 * the IO tag for this request or if the core is managing it.
-	 */
-	bool was_tag_assigned_by_user;
-
-	/**
-	 * This field indicates the IO tag for this request.  The IO tag is
-	 * comprised of the task_index and a sequence count. The sequence count
-	 * is utilized to help identify tasks from one life to another.
-	 */
-	u16 io_tag;
-
-	/**
-	 * This field specifies the protocol being utilized for this
-	 * IO request.
-	 */
-	SCIC_TRANSPORT_PROTOCOL protocol;
-
-	/**
-	 * This field indicates the completion status taken from the SCUs
-	 * completion code.  It indicates the completion result for the SCU hardware.
-	 */
-	u32 scu_status;
-
-	/**
-	 * This field indicates the completion status returned to the SCI user.  It
-	 * indicates the users view of the io request completion.
-	 */
-	u32 sci_status;
-
-	/**
-	 * This field contains the value to be utilized when posting (e.g. Post_TC,
-	 * Post_TC_Abort) this request to the silicon.
-	 */
-	u32 post_context;
-
-	struct scu_task_context *task_context_buffer;
-	struct scu_task_context tc ____cacheline_aligned;
-
-	/* could be larger with sg chaining */
-	#define SCU_SGL_SIZE ((SCU_IO_REQUEST_SGE_COUNT + 1) / 2)
-	struct scu_sgl_element_pair sg_table[SCU_SGL_SIZE] __attribute__ ((aligned(32)));
-
-	/**
-	 * This field indicates if this request is a task management request or
-	 * normal IO request.
-	 */
-	bool is_task_management_request;
-
-	/**
-	 * This field indicates that this request contains an initialized started
-	 * substate machine.
-	 */
-	bool has_started_substate_machine;
-
-	/**
-	 * This field is a pointer to the stored rx frame data.  It is used in STP
-	 * internal requests and SMP response frames.  If this field is non-NULL the
-	 * saved frame must be released on IO request completion.
-	 *
-	 * @todo In the future do we want to keep a list of RX frame buffers?
-	 */
-	u32 saved_rx_frame_index;
-
-	/**
-	 * This field specifies the data necessary to manage the sub-state
-	 * machine executed while in the SCI_BASE_REQUEST_STATE_STARTED state.
-	 */
-	struct sci_base_state_machine started_substate_machine;
-
-	/**
-	 * This field specifies the current state handlers in place for this
-	 * IO Request object.  This field is updated each time the request
-	 * changes state.
-	 */
-	const struct scic_sds_io_request_state_handler *state_handlers;
-
-	/**
-	 * This field in the recorded device sequence for the io request.  This is
-	 * recorded during the build operation and is compared in the start
-	 * operation.  If the sequence is different then there was a change of
-	 * devices from the build to start operations.
-	 */
-	u8 device_sequence;
-
-	union {
-		struct {
-			union {
-				struct ssp_cmd_iu cmd;
-				struct ssp_task_iu tmf;
-			};
-			union {
-				struct ssp_response_iu rsp;
-				u8 rsp_buf[SSP_RESP_IU_MAX_SIZE];
-			};
-		} ssp;
-
-		struct {
-			struct smp_req cmd;
-			struct smp_resp rsp;
-		} smp;
-
-		struct {
-			struct scic_sds_stp_request req;
-			struct host_to_dev_fis cmd;
-			struct dev_to_host_fis rsp;
-		} stp;
-	};
-
-};
-
-static inline struct scic_sds_request *to_sci_req(struct scic_sds_stp_request *stp_req)
-{
-	struct scic_sds_request *sci_req;
-
-	sci_req = container_of(stp_req, typeof(*sci_req), stp.req);
-	return sci_req;
-}
-
-/**
- * enum sci_base_request_states - This enumeration depicts all the states for
- *    the common request state machine.
- *
- *
- */
-enum sci_base_request_states {
-	/**
-	 * Simply the initial state for the base request state machine.
-	 */
-	SCI_BASE_REQUEST_STATE_INITIAL,
-
-	/**
-	 * This state indicates that the request has been constructed. This state
-	 * is entered from the INITIAL state.
-	 */
-	SCI_BASE_REQUEST_STATE_CONSTRUCTED,
-
-	/**
-	 * This state indicates that the request has been started. This state is
-	 * entered from the CONSTRUCTED state.
-	 */
-	SCI_BASE_REQUEST_STATE_STARTED,
-
-	/**
-	 * This state indicates that the request has completed.
-	 * This state is entered from the STARTED state. This state is entered from
-	 * the ABORTING state.
-	 */
-	SCI_BASE_REQUEST_STATE_COMPLETED,
-
-	/**
-	 * This state indicates that the request is in the process of being
-	 * terminated/aborted.
-	 * This state is entered from the CONSTRUCTED state.
-	 * This state is entered from the STARTED state.
-	 */
-	SCI_BASE_REQUEST_STATE_ABORTING,
-
-	/**
-	 * Simply the final state for the base request state machine.
-	 */
-	SCI_BASE_REQUEST_STATE_FINAL,
-};
-
-typedef enum sci_status (*scic_sds_io_request_handler_t)
-				(struct scic_sds_request *request);
-typedef enum sci_status (*scic_sds_io_request_frame_handler_t)
-				(struct scic_sds_request *req, u32 frame);
-typedef enum sci_status (*scic_sds_io_request_event_handler_t)
-				(struct scic_sds_request *req, u32 event);
-typedef enum sci_status (*scic_sds_io_request_task_completion_handler_t)
-				(struct scic_sds_request *req, u32 completion_code);
-
-/**
- * struct scic_sds_io_request_state_handler - This is the SDS core definition
- *    of the state handlers.
- *
- *
- */
-struct scic_sds_io_request_state_handler {
-	/**
-	 * The start_handler specifies the method invoked when a user attempts to
-	 * start a request.
-	 */
-	scic_sds_io_request_handler_t start_handler;
-
-	/**
-	 * The abort_handler specifies the method invoked when a user attempts to
-	 * abort a request.
-	 */
-	scic_sds_io_request_handler_t abort_handler;
-
-	/**
-	 * The complete_handler specifies the method invoked when a user attempts to
-	 * complete a request.
-	 */
-	scic_sds_io_request_handler_t complete_handler;
-
-	scic_sds_io_request_task_completion_handler_t tc_completion_handler;
-	scic_sds_io_request_event_handler_t event_handler;
-	scic_sds_io_request_frame_handler_t frame_handler;
-
-};
-
-extern const struct sci_base_state scic_sds_io_request_started_task_mgmt_substate_table[];
-
-/**
- * scic_sds_request_get_controller() -
- *
- * This macro will return the controller for this io request object
- */
-#define scic_sds_request_get_controller(sci_req) \
-	((sci_req)->owning_controller)
-
-/**
- * scic_sds_request_get_device() -
- *
- * This macro will return the device for this io request object
- */
-#define scic_sds_request_get_device(sci_req) \
-	((sci_req)->target_device)
-
-/**
- * scic_sds_request_get_port() -
- *
- * This macro will return the port for this io request object
- */
-#define scic_sds_request_get_port(sci_req)	\
-	scic_sds_remote_device_get_port(scic_sds_request_get_device(sci_req))
-
-/**
- * scic_sds_request_get_post_context() -
- *
- * This macro returns the constructed post context result for the io request.
- */
-#define scic_sds_request_get_post_context(sci_req)	\
-	((sci_req)->post_context)
-
-/**
- * scic_sds_request_get_task_context() -
- *
- * This is a helper macro to return the os handle for this request object.
- */
-#define scic_sds_request_get_task_context(request) \
-	((request)->task_context_buffer)
-
-/**
- * scic_sds_request_set_status() -
- *
- * This macro will set the scu hardware status and sci request completion
- * status for an io request.
- */
-#define scic_sds_request_set_status(request, scu_status_code, sci_status_code) \
-	{ \
-		(request)->scu_status = (scu_status_code); \
-		(request)->sci_status = (sci_status_code); \
-	}
-
-#define scic_sds_request_complete(a_request) \
-	((a_request)->state_handlers->complete_handler(a_request))
-
-
-extern enum sci_status
-scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completion_code);
-
-/**
- * SCU_SGL_ZERO() -
- *
- * This macro zeros the hardware SGL element data
- */
-#define SCU_SGL_ZERO(scu_sge) \
-	{ \
-		(scu_sge).length = 0; \
-		(scu_sge).address_lower = 0; \
-		(scu_sge).address_upper = 0; \
-		(scu_sge).address_modifier = 0;	\
-	}
-
-/**
- * SCU_SGL_COPY() -
- *
- * This macro copys the SGL Element data from the host os to the hardware SGL
- * elment data
- */
-#define SCU_SGL_COPY(scu_sge, os_sge) \
-	{ \
-		(scu_sge).length = sg_dma_len(sg); \
-		(scu_sge).address_upper = \
-			upper_32_bits(sg_dma_address(sg)); \
-		(scu_sge).address_lower = \
-			lower_32_bits(sg_dma_address(sg)); \
-		(scu_sge).address_modifier = 0;	\
-	}
-
-/**
- * scic_sds_request_get_user_request() -
- *
- * This is a helper macro to return the os handle for this request object.
- */
-#define scic_sds_request_get_user_request(request) \
-	((request)->user_request)
-
-/*
- * *****************************************************************************
- * * CORE REQUEST PROTOTYPES
- * ***************************************************************************** */
-
-void scic_sds_request_build_sgl(
-	struct scic_sds_request *sci_req);
-
-
-
-void scic_sds_stp_request_assign_buffers(
-	struct scic_sds_request *sci_req);
-
-void scic_sds_smp_request_assign_buffers(
-	struct scic_sds_request *sci_req);
-
-/* --------------------------------------------------------------------------- */
-
-enum sci_status scic_sds_request_start(
-	struct scic_sds_request *sci_req);
-
-enum sci_status scic_sds_io_request_terminate(
-	struct scic_sds_request *sci_req);
-
-enum sci_status scic_sds_io_request_complete(
-	struct scic_sds_request *sci_req);
-
-void scic_sds_io_request_copy_response(
-	struct scic_sds_request *sci_req);
-
-enum sci_status scic_sds_io_request_event_handler(
-	struct scic_sds_request *sci_req,
-	u32 event_code);
-
-enum sci_status scic_sds_io_request_frame_handler(
-	struct scic_sds_request *sci_req,
-	u32 frame_index);
-
-
-enum sci_status scic_sds_task_request_terminate(
-	struct scic_sds_request *sci_req);
-
-/*
- * *****************************************************************************
- * * STARTED STATE HANDLERS
- * ***************************************************************************** */
-
-enum sci_status scic_sds_request_started_state_abort_handler(
-	struct scic_sds_request *sci_req);
-
-enum sci_status scic_sds_request_started_state_tc_completion_handler(
-	struct scic_sds_request *sci_req,
-	u32 completion_code);
-
-#endif /* _SCIC_SDS_IO_REQUEST_H_ */

drivers/scsi/isci/core/scic_sds_smp_request.h

@@ -1,67 +0,0 @@
-/*
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-#ifndef _SCIC_SDS_SMP_REQUEST_T_
-#define _SCIC_SDS_SMP_REQUEST_T_
-
-#include "scic_sds_request.h"
-
-
-u32 scic_sds_smp_request_get_object_size(void);
-
-
-void scic_sds_smp_request_copy_response(struct scic_sds_request *sci_req);
-
-#endif /* _SCIC_SDS_SMP_REQUEST_T_ */
-

drivers/scsi/isci/core/scic_sds_stp_packet_request.h

@@ -1,113 +0,0 @@
-/*
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-#ifndef _SCIC_SDS_STP_PACKET_REQUEST_H_
-#define _SCIC_SDS_STP_PACKET_REQUEST_H_
-
-#include "scic_sds_stp_request.h"
-
-/**
- * This file contains the structures and constants for PACKET protocol requests.
- *
- *
- */
-
-
-/**
- *
- *
- * This is the enumeration of the SATA PIO DATA IN started substate machine.
- */
-enum _scic_sds_stp_packet_request_started_substates {
-	/**
-	 * While in this state the IO request object is waiting for the TC completion
-	 * notification for the H2D Register FIS
-	 */
-	SCIC_SDS_STP_PACKET_REQUEST_STARTED_PACKET_PHASE_AWAIT_TC_COMPLETION_SUBSTATE,
-
-	/**
-	 * While in this state the IO request object is waiting for either a PIO Setup.
-	 */
-	SCIC_SDS_STP_PACKET_REQUEST_STARTED_PACKET_PHASE_AWAIT_PIO_SETUP_SUBSTATE,
-
-	/**
-	 * While in this state the IO request object is waiting for TC completion for
-	 * the Packet DMA DATA fis or Raw Frame.
-	 */
-	SCIC_SDS_STP_PACKET_REQUEST_STARTED_COMMAND_PHASE_AWAIT_TC_COMPLETION_SUBSTATE,
-
-	/**
-	 * The non-data IO transit to this state in this state after receiving TC
-	 * completion. While in this state IO request object is waiting for D2H status
-	 * frame as UF.
-	 */
-	SCIC_SDS_STP_PACKET_REQUEST_STARTED_COMMAND_PHASE_AWAIT_D2H_FIS_SUBSTATE,
-
-	/**
-	 * The IO transit to this state in this state if the previous TC completion status
-	 * is not success and the atapi device is suspended due to target device failed the IO.
-	 * While in this state IO request object is waiting for device coming out of the
-	 * suspension state then complete the IO.
-	 */
-	SCIC_SDS_STP_PACKET_REQUEST_STARTED_COMPLETION_DELAY_SUBSTATE,
-};
-
-#define scic_sds_stp_packet_request_construct(request) SCI_FAILURE
-#define scu_stp_packet_request_command_phase_construct_task_context(reqeust, tc)
-#define scu_stp_packet_request_command_phase_reconstruct_raw_frame_task_context(reqeust, tc)
-#define scic_sds_stp_packet_request_process_status_fis(reqeust, fis) SCI_FAILURE
-#define scic_sds_stp_packet_internal_request_sense_build_sgl(request)
-
-#endif /* _SCIC_SDS_STP_PACKET_REQUEST_H_ */
-

drivers/scsi/isci/core/scic_sds_stp_pio_request.h

@@ -1,104 +0,0 @@
-/*
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _SCIC_SDS_SATA_PIO_REQUEST_H_
-#define _SCIC_SDS_SATA_PIO_REQUEST_H_
-
-#include "scic_sds_request.h"
-#include "scu_task_context.h"
-
-/**
- * This file contains the structures and constants for SATA PIO requests.
- *
- *
- */
-
-
-/**
- *
- *
- * This is the enumeration of the SATA PIO DATA IN started substate machine.
- */
-enum _scic_sds_stp_request_started_pio_substates {
-	/**
-	 * While in this state the IO request object is waiting for the TC completion
-	 * notification for the H2D Register FIS
-	 */
-	SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE,
-
-	/**
-	 * While in this state the IO request object is waiting for either a PIO Setup
-	 * FIS or a D2H register FIS.  The type of frame received is based on the
-	 * result of the prior frame and line conditions.
-	 */
-	SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE,
-
-	/**
-	 * While in this state the IO request object is waiting for a DATA frame from
-	 * the device.
-	 */
-	SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE,
-
-	/**
-	 * While in this state the IO request object is waiting to transmit the next data
-	 * frame to the device.
-	 */
-	SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE,
-};
-
-struct scic_sds_stp_request;
-
-
-#endif   /* _SCIC_SDS_SATA_PIO_REQUEST_H_ */

drivers/scsi/isci/core/scic_task_request.h

@@ -1,104 +0,0 @@
-/*
- * This file is provided under a dual BSD/GPLv2 license.  When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- * The full GNU General Public License is included in this distribution
- * in the file called LICENSE.GPL.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *   * Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer.
- *   * Redistributions in binary form must reproduce the above copyright
- *     notice, this list of conditions and the following disclaimer in
- *     the documentation and/or other materials provided with the
- *     distribution.
- *   * Neither the name of Intel Corporation nor the names of its
- *     contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _SCIC_TASK_REQUEST_H_
-#define _SCIC_TASK_REQUEST_H_
-
-#include "isci.h"
-
-struct scic_sds_request;
-struct scic_sds_remote_device;
-struct scic_sds_controller;
-
-
-enum sci_status scic_task_request_construct(
-	struct scic_sds_controller *scic_controller,
-	struct scic_sds_remote_device *scic_remote_device,
-	u16 io_tag, struct scic_sds_request *sci_req);
-
-/**
- * scic_task_request_construct_ssp() - This method is called by the SCI user to
- *    construct all SCI Core SSP task management requests.  Memory
- *    initialization and functionality common to all task request types is
- *    performed in this method.
- * @scic_task_request: This parameter specifies the handle to the core task
- *    request object for which to construct a SATA specific task management
- *    request.
- *
- * Indicate if the controller successfully built the task request. SCI_SUCCESS
- * This value is returned if the task request was successfully built.
- */
-enum sci_status scic_task_request_construct_ssp(
-	struct scic_sds_request *scic_task_request);
-
-/**
- * scic_task_request_construct_sata() - This method is called by the SCI user
- *    to construct all SCI Core SATA task management requests.  Memory
- *    initialization and functionality common to all task request types is
- *    performed in this method.
- * @scic_task_request_handle: This parameter specifies the handle to the core
- *    task request object for which to construct a SATA specific task
- *    management request.
- *
- * Indicate if the controller successfully built the task request. SCI_SUCCESS
- * This value is returned if the task request was successfully built.
- */
-enum sci_status scic_task_request_construct_sata(
-	struct scic_sds_request *scic_task_request_handle);
-
-
-
-#endif  /* _SCIC_TASK_REQUEST_H_ */
-

drivers/scsi/isci/host.c

@@ -61,9 +61,7 @@
 #include "probe_roms.h"
 #include "remote_device.h"
 #include "request.h"
-#include "scic_io_request.h"
 #include "scic_sds_port_configuration_agent.h"
-#include "sci_util.h"
 #include "scu_completion_codes.h"
 #include "scu_event_codes.h"
 #include "registers.h"

drivers/scsi/isci/isci.h

@@ -521,6 +521,25 @@ enum sci_task_status {
 
 };
 
+/**
+ * sci_swab32_cpy - convert between scsi and scu-hardware byte format
+ * @dest: receive the 4-byte endian swapped version of src
+ * @src: word aligned source buffer
+ *
+ * scu hardware handles SSP/SMP control, response, and unidentified
+ * frames in "big endian dword" order.  Regardless of host endian this
+ * is always a swab32()-per-dword conversion of the standard definition,
+ * i.e. single byte fields swapped and multi-byte fields in little-
+ * endian
+ */
+static inline void sci_swab32_cpy(void *_dest, void *_src, ssize_t word_cnt)
+{
+	u32 *dest = _dest, *src = _src;
+
+	while (--word_cnt >= 0)
+		dest[word_cnt] = swab32(src[word_cnt]);
+}
+
 extern unsigned char no_outbound_task_to;
 extern u16 ssp_max_occ_to;
 extern u16 stp_max_occ_to;

drivers/scsi/isci/port.c

@@ -55,7 +55,6 @@
 
 #include <linux/workqueue.h>
 #include "isci.h"
-#include "scic_io_request.h"
 #include "scic_phy.h"
 #include "scic_sds_phy.h"
 #include "scic_port.h"

drivers/scsi/isci/remote_device.c

@@ -57,14 +57,11 @@
 #include "port.h"
 #include "remote_device.h"
 #include "request.h"
-#include "scic_io_request.h"
 #include "scic_phy.h"
 #include "scic_port.h"
 #include "scic_sds_phy.h"
 #include "scic_sds_port.h"
 #include "remote_node_context.h"
-#include "scic_sds_request.h"
-#include "sci_util.h"
 #include "scu_event_codes.h"
 #include "task.h"
 

drivers/scsi/isci/remote_node_context.c

@@ -58,7 +58,6 @@
 #include "scic_sds_port.h"
 #include "remote_device.h"
 #include "remote_node_context.h"
-#include "sci_util.h"
 #include "scu_event_codes.h"
 #include "scu_task_context.h"
 

drivers/scsi/isci/remote_node_table.c

@@ -59,7 +59,6 @@
  *
  *
  */
-#include "sci_util.h"
 #include "remote_node_table.h"
 #include "remote_node_context.h"
 

drivers/scsi/isci/request.c

@@ -54,898 +54,1286 @@
  */
 
 #include "isci.h"
-#include "scic_io_request.h"
-#include "scic_task_request.h"
 #include "scic_port.h"
 #include "task.h"
 #include "request.h"
 #include "sata.h"
 #include "scu_completion_codes.h"
-#include "scic_sds_request.h"
 #include "sas.h"
 
-static enum sci_status isci_request_ssp_request_construct(
-	struct isci_request *request)
-{
-	enum sci_status status;
+/**
+ * This method returns the sgl element pair for the specificed sgl_pair index.
+ * @sci_req: This parameter specifies the IO request for which to retrieve
+ *    the Scatter-Gather List element pair.
+ * @sgl_pair_index: This parameter specifies the index into the SGL element
+ *    pair to be retrieved.
+ *
+ * This method returns a pointer to an struct scu_sgl_element_pair.
+ */
+static struct scu_sgl_element_pair *scic_sds_request_get_sgl_element_pair(
+	struct scic_sds_request *sci_req,
+	u32 sgl_pair_index
+	) {
+	struct scu_task_context *task_context;
+
+	task_context = (struct scu_task_context *)sci_req->task_context_buffer;
+
+	if (sgl_pair_index == 0) {
+		return &task_context->sgl_pair_ab;
+	} else if (sgl_pair_index == 1) {
+		return &task_context->sgl_pair_cd;
+	}
 
-	dev_dbg(&request->isci_host->pdev->dev,
-		"%s: request = %p\n",
-		__func__,
-		request);
-	status = scic_io_request_construct_basic_ssp(&request->sci);
-	return status;
+	return &sci_req->sg_table[sgl_pair_index - 2];
 }
 
-static enum sci_status isci_request_stp_request_construct(
-	struct isci_request *request)
+/**
+ * This function will build the SGL list for an IO request.
+ * @sci_req: This parameter specifies the IO request for which to build
+ *    the Scatter-Gather List.
+ *
+ */
+void scic_sds_request_build_sgl(struct scic_sds_request *sds_request)
 {
-	struct sas_task *task = isci_request_access_task(request);
-	enum sci_status status;
-	struct host_to_dev_fis *register_fis;
-
-	dev_dbg(&request->isci_host->pdev->dev,
-		"%s: request = %p\n",
-		__func__,
-		request);
+	struct isci_request *isci_request = sci_req_to_ireq(sds_request);
+	struct isci_host *isci_host = isci_request->isci_host;
+	struct sas_task *task = isci_request_access_task(isci_request);
+	struct scatterlist *sg = NULL;
+	dma_addr_t dma_addr;
+	u32 sg_idx = 0;
+	struct scu_sgl_element_pair *scu_sg   = NULL;
+	struct scu_sgl_element_pair *prev_sg  = NULL;
+
+	if (task->num_scatter > 0) {
+		sg = task->scatter;
+
+		while (sg) {
+			scu_sg = scic_sds_request_get_sgl_element_pair(
+					sds_request,
+					sg_idx);
+
+			SCU_SGL_COPY(scu_sg->A, sg);
+
+			sg = sg_next(sg);
+
+			if (sg) {
+				SCU_SGL_COPY(scu_sg->B, sg);
+				sg = sg_next(sg);
+			} else
+				SCU_SGL_ZERO(scu_sg->B);
+
+			if (prev_sg) {
+				dma_addr =
+					scic_io_request_get_dma_addr(
+							sds_request,
+							scu_sg);
+
+				prev_sg->next_pair_upper =
+					upper_32_bits(dma_addr);
+				prev_sg->next_pair_lower =
+					lower_32_bits(dma_addr);
+			}
+
+			prev_sg = scu_sg;
+			sg_idx++;
+		}
+	} else {	/* handle when no sg */
+		scu_sg = scic_sds_request_get_sgl_element_pair(sds_request,
+							       sg_idx);
 
-	/* Get the host_to_dev_fis from the core and copy
-	 * the fis from the task into it.
-	 */
-	register_fis = isci_sata_task_to_fis_copy(task);
+		dma_addr = dma_map_single(&isci_host->pdev->dev,
+					  task->scatter,
+					  task->total_xfer_len,
+					  task->data_dir);
 
-	status = scic_io_request_construct_basic_sata(&request->sci);
+		isci_request->zero_scatter_daddr = dma_addr;
 
-	/* Set the ncq tag in the fis, from the queue
-	 * command in the task.
-	 */
-	if (isci_sata_is_task_ncq(task)) {
+		scu_sg->A.length = task->total_xfer_len;
+		scu_sg->A.address_upper = upper_32_bits(dma_addr);
+		scu_sg->A.address_lower = lower_32_bits(dma_addr);
+	}
 
-		isci_sata_set_ncq_tag(
-			register_fis,
-			task
-			);
+	if (scu_sg) {
+		scu_sg->next_pair_upper = 0;
+		scu_sg->next_pair_lower = 0;
 	}
+}
 
-	return status;
+static void scic_sds_ssp_io_request_assign_buffers(struct scic_sds_request *sci_req)
+{
+	if (sci_req->was_tag_assigned_by_user == false)
+		sci_req->task_context_buffer = &sci_req->tc;
 }
 
-/*
- * isci_smp_request_build() - This function builds the smp request.
- * @ireq: This parameter points to the isci_request allocated in the
- *    request construct function.
- *
- * SCI_SUCCESS on successfull completion, or specific failure code.
- */
-static enum sci_status isci_smp_request_build(struct isci_request *ireq)
+static void scic_sds_io_request_build_ssp_command_iu(struct scic_sds_request *sci_req)
 {
-	enum sci_status status = SCI_FAILURE;
+	struct ssp_cmd_iu *cmd_iu;
+	struct isci_request *ireq = sci_req_to_ireq(sci_req);
 	struct sas_task *task = isci_request_access_task(ireq);
-	struct scic_sds_request *sci_req = &ireq->sci;
 
-	dev_dbg(&ireq->isci_host->pdev->dev,
-		"%s: request = %p\n", __func__, ireq);
+	cmd_iu = &sci_req->ssp.cmd;
 
-	dev_dbg(&ireq->isci_host->pdev->dev,
-		"%s: smp_req len = %d\n",
-		__func__,
-		task->smp_task.smp_req.length);
+	memcpy(cmd_iu->LUN, task->ssp_task.LUN, 8);
+	cmd_iu->add_cdb_len = 0;
+	cmd_iu->_r_a = 0;
+	cmd_iu->_r_b = 0;
+	cmd_iu->en_fburst = 0; /* unsupported */
+	cmd_iu->task_prio = task->ssp_task.task_prio;
+	cmd_iu->task_attr = task->ssp_task.task_attr;
+	cmd_iu->_r_c = 0;
 
-	/* copy the smp_command to the address; */
-	sg_copy_to_buffer(&task->smp_task.smp_req, 1,
-			  &sci_req->smp.cmd,
-			  sizeof(struct smp_req));
+	sci_swab32_cpy(&cmd_iu->cdb, task->ssp_task.cdb,
+		       sizeof(task->ssp_task.cdb) / sizeof(u32));
+}
 
-	status = scic_io_request_construct_smp(sci_req);
-	if (status != SCI_SUCCESS)
-		dev_warn(&ireq->isci_host->pdev->dev,
-			 "%s: failed with status = %d\n",
-			 __func__,
-			 status);
+static void scic_sds_task_request_build_ssp_task_iu(struct scic_sds_request *sci_req)
+{
+	struct ssp_task_iu *task_iu;
+	struct isci_request *ireq = sci_req_to_ireq(sci_req);
+	struct sas_task *task = isci_request_access_task(ireq);
+	struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq);
 
-	return status;
+	task_iu = &sci_req->ssp.tmf;
+
+	memset(task_iu, 0, sizeof(struct ssp_task_iu));
+
+	memcpy(task_iu->LUN, task->ssp_task.LUN, 8);
+
+	task_iu->task_func = isci_tmf->tmf_code;
+	task_iu->task_tag =
+		(ireq->ttype == tmf_task) ?
+		isci_tmf->io_tag :
+		SCI_CONTROLLER_INVALID_IO_TAG;
 }
 
 /**
- * isci_io_request_build() - This function builds the io request object.
- * @isci_host: This parameter specifies the ISCI host object
- * @request: This parameter points to the isci_request object allocated in the
- *    request construct function.
- * @sci_device: This parameter is the handle for the sci core's remote device
- *    object that is the destination for this request.
+ * This method is will fill in the SCU Task Context for any type of SSP request.
+ * @sci_req:
+ * @task_context:
  *
- * SCI_SUCCESS on successfull completion, or specific failure code.
  */
-static enum sci_status isci_io_request_build(
-	struct isci_host *isci_host,
-	struct isci_request *request,
-	struct isci_remote_device *isci_device)
+static void scu_ssp_reqeust_construct_task_context(
+	struct scic_sds_request *sds_request,
+	struct scu_task_context *task_context)
 {
-	enum sci_status status = SCI_SUCCESS;
-	struct sas_task *task = isci_request_access_task(request);
-	struct scic_sds_remote_device *sci_device = &isci_device->sci;
+	dma_addr_t dma_addr;
+	struct scic_sds_controller *controller;
+	struct scic_sds_remote_device *target_device;
+	struct scic_sds_port *target_port;
+
+	controller = scic_sds_request_get_controller(sds_request);
+	target_device = scic_sds_request_get_device(sds_request);
+	target_port = scic_sds_request_get_port(sds_request);
+
+	/* Fill in the TC with the its required data */
+	task_context->abort = 0;
+	task_context->priority = 0;
+	task_context->initiator_request = 1;
+	task_context->connection_rate = target_device->connection_rate;
+	task_context->protocol_engine_index =
+		scic_sds_controller_get_protocol_engine_group(controller);
+	task_context->logical_port_index =
+		scic_sds_port_get_index(target_port);
+	task_context->protocol_type = SCU_TASK_CONTEXT_PROTOCOL_SSP;
+	task_context->valid = SCU_TASK_CONTEXT_VALID;
+	task_context->context_type = SCU_TASK_CONTEXT_TYPE;
+
+	task_context->remote_node_index =
+		scic_sds_remote_device_get_index(sds_request->target_device);
+	task_context->command_code = 0;
+
+	task_context->link_layer_control = 0;
+	task_context->do_not_dma_ssp_good_response = 1;
+	task_context->strict_ordering = 0;
+	task_context->control_frame = 0;
+	task_context->timeout_enable = 0;
+	task_context->block_guard_enable = 0;
+
+	task_context->address_modifier = 0;
+
+	/* task_context->type.ssp.tag = sci_req->io_tag; */
+	task_context->task_phase = 0x01;
+
+	if (sds_request->was_tag_assigned_by_user) {
+		/*
+		 * Build the task context now since we have already read
+		 * the data
+		 */
+		sds_request->post_context =
+			(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
+			 (scic_sds_controller_get_protocol_engine_group(
+							controller) <<
+			  SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
+			 (scic_sds_port_get_index(target_port) <<
+			  SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
+			 scic_sds_io_tag_get_index(sds_request->io_tag));
+	} else {
+		/*
+		 * Build the task context now since we have already read
+		 * the data
+		 *
+		 * I/O tag index is not assigned because we have to wait
+		 * until we get a TCi
+		 */
+		sds_request->post_context =
+			(SCU_CONTEXT_COMMAND_REQUEST_TYPE_POST_TC |
+			 (scic_sds_controller_get_protocol_engine_group(
+							owning_controller) <<
+			  SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
+			 (scic_sds_port_get_index(target_port) <<
+			  SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT));
+	}
 
-	dev_dbg(&isci_host->pdev->dev,
-		"%s: isci_device = 0x%p; request = %p, "
-		"num_scatter = %d\n",
-		__func__,
-		isci_device,
-		request,
-		task->num_scatter);
+	/*
+	 * Copy the physical address for the command buffer to the
+	 * SCU Task Context
+	 */
+	dma_addr = scic_io_request_get_dma_addr(sds_request,
+						&sds_request->ssp.cmd);
 
-	/* map the sgl addresses, if present.
-	 * libata does the mapping for sata devices
-	 * before we get the request.
+	task_context->command_iu_upper = upper_32_bits(dma_addr);
+	task_context->command_iu_lower = lower_32_bits(dma_addr);
+
+	/*
+	 * Copy the physical address for the response buffer to the
+	 * SCU Task Context
 	 */
-	if (task->num_scatter &&
-	    !sas_protocol_ata(task->task_proto) &&
-	    !(SAS_PROTOCOL_SMP & task->task_proto)) {
+	dma_addr = scic_io_request_get_dma_addr(sds_request,
+						&sds_request->ssp.rsp);
 
-		request->num_sg_entries = dma_map_sg(
-			&isci_host->pdev->dev,
-			task->scatter,
-			task->num_scatter,
-			task->data_dir
-			);
+	task_context->response_iu_upper = upper_32_bits(dma_addr);
+	task_context->response_iu_lower = lower_32_bits(dma_addr);
+}
 
-		if (request->num_sg_entries == 0)
-			return SCI_FAILURE_INSUFFICIENT_RESOURCES;
-	}
+/**
+ * This method is will fill in the SCU Task Context for a SSP IO request.
+ * @sci_req:
+ *
+ */
+static void scu_ssp_io_request_construct_task_context(
+	struct scic_sds_request *sci_req,
+	enum dma_data_direction dir,
+	u32 len)
+{
+	struct scu_task_context *task_context;
 
-	/* build the common request object. For now,
-	 * we will let the core allocate the IO tag.
-	 */
-	status = scic_io_request_construct(&isci_host->sci, sci_device,
-					   SCI_CONTROLLER_INVALID_IO_TAG,
-					   &request->sci);
+	task_context = scic_sds_request_get_task_context(sci_req);
 
-	if (status != SCI_SUCCESS) {
-		dev_warn(&isci_host->pdev->dev,
-			 "%s: failed request construct\n",
-			 __func__);
-		return SCI_FAILURE;
-	}
+	scu_ssp_reqeust_construct_task_context(sci_req, task_context);
 
-	switch (task->task_proto) {
-	case SAS_PROTOCOL_SMP:
-		status = isci_smp_request_build(request);
-		break;
-	case SAS_PROTOCOL_SSP:
-		status = isci_request_ssp_request_construct(request);
+	task_context->ssp_command_iu_length =
+		sizeof(struct ssp_cmd_iu) / sizeof(u32);
+	task_context->type.ssp.frame_type = SSP_COMMAND;
+
+	switch (dir) {
+	case DMA_FROM_DEVICE:
+	case DMA_NONE:
+	default:
+		task_context->task_type = SCU_TASK_TYPE_IOREAD;
 		break;
-	case SAS_PROTOCOL_SATA:
-	case SAS_PROTOCOL_STP:
-	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
-		status = isci_request_stp_request_construct(request);
+	case DMA_TO_DEVICE:
+		task_context->task_type = SCU_TASK_TYPE_IOWRITE;
 		break;
-	default:
-		dev_warn(&isci_host->pdev->dev,
-			 "%s: unknown protocol\n", __func__);
-		return SCI_FAILURE;
 	}
 
-	return SCI_SUCCESS;
+	task_context->transfer_length_bytes = len;
+
+	if (task_context->transfer_length_bytes > 0)
+		scic_sds_request_build_sgl(sci_req);
 }
 
+static void scic_sds_ssp_task_request_assign_buffers(struct scic_sds_request *sci_req)
+{
+	if (sci_req->was_tag_assigned_by_user == false)
+		sci_req->task_context_buffer = &sci_req->tc;
+}
 
 /**
- * isci_request_alloc_core() - This function gets the request object from the
- *    isci_host dma cache.
- * @isci_host: This parameter specifies the ISCI host object
- * @isci_request: This parameter will contain the pointer to the new
- *    isci_request object.
- * @isci_device: This parameter is the pointer to the isci remote device object
- *    that is the destination for this request.
- * @gfp_flags: This parameter specifies the os allocation flags.
+ * This method will fill in the SCU Task Context for a SSP Task request.  The
+ *    following important settings are utilized: -# priority ==
+ *    SCU_TASK_PRIORITY_HIGH.  This ensures that the task request is issued
+ *    ahead of other task destined for the same Remote Node. -# task_type ==
+ *    SCU_TASK_TYPE_IOREAD.  This simply indicates that a normal request type
+ *    (i.e. non-raw frame) is being utilized to perform task management. -#
+ *    control_frame == 1.  This ensures that the proper endianess is set so
+ *    that the bytes are transmitted in the right order for a task frame.
+ * @sci_req: This parameter specifies the task request object being
+ *    constructed.
  *
- * SCI_SUCCESS on successfull completion, or specific failure code.
  */
-static int isci_request_alloc_core(
-	struct isci_host *isci_host,
-	struct isci_request **isci_request,
-	struct isci_remote_device *isci_device,
-	gfp_t gfp_flags)
+static void scu_ssp_task_request_construct_task_context(
+	struct scic_sds_request *sci_req)
 {
-	int ret = 0;
-	dma_addr_t handle;
-	struct isci_request *request;
-
-
-	/* get pointer to dma memory. This actually points
-	 * to both the isci_remote_device object and the
-	 * sci object. The isci object is at the beginning
-	 * of the memory allocated here.
-	 */
-	request = dma_pool_alloc(isci_host->dma_pool, gfp_flags, &handle);
-	if (!request) {
-		dev_warn(&isci_host->pdev->dev,
-			 "%s: dma_pool_alloc returned NULL\n", __func__);
-		return -ENOMEM;
-	}
-
-	/* initialize the request object.	*/
-	spin_lock_init(&request->state_lock);
-	request->request_daddr = handle;
-	request->isci_host = isci_host;
-	request->isci_device = isci_device;
-	request->io_request_completion = NULL;
-	request->terminated = false;
-
-	request->num_sg_entries = 0;
-
-	request->complete_in_target = false;
+	struct scu_task_context *task_context;
 
-	INIT_LIST_HEAD(&request->completed_node);
-	INIT_LIST_HEAD(&request->dev_node);
+	task_context = scic_sds_request_get_task_context(sci_req);
 
-	*isci_request = request;
-	isci_request_change_state(request, allocated);
+	scu_ssp_reqeust_construct_task_context(sci_req, task_context);
 
-	return ret;
+	task_context->control_frame                = 1;
+	task_context->priority                     = SCU_TASK_PRIORITY_HIGH;
+	task_context->task_type                    = SCU_TASK_TYPE_RAW_FRAME;
+	task_context->transfer_length_bytes        = 0;
+	task_context->type.ssp.frame_type          = SSP_TASK;
+	task_context->ssp_command_iu_length =
+		sizeof(struct ssp_task_iu) / sizeof(u32);
 }
 
-static int isci_request_alloc_io(
-	struct isci_host *isci_host,
-	struct sas_task *task,
-	struct isci_request **isci_request,
-	struct isci_remote_device *isci_device,
-	gfp_t gfp_flags)
-{
-	int retval = isci_request_alloc_core(isci_host, isci_request,
-					     isci_device, gfp_flags);
 
-	if (!retval) {
-		(*isci_request)->ttype_ptr.io_task_ptr = task;
-		(*isci_request)->ttype                 = io_task;
+/**
+ * This method constructs the SSP Command IU data for this ssp passthrough
+ *    comand request object.
+ * @sci_req: This parameter specifies the request object for which the SSP
+ *    command information unit is being built.
+ *
+ * enum sci_status, returns invalid parameter is cdb > 16
+ */
 
-		task->lldd_task = *isci_request;
-	}
-	return retval;
-}
 
 /**
- * isci_request_alloc_tmf() - This function gets the request object from the
- *    isci_host dma cache and initializes the relevant fields as a sas_task.
- * @isci_host: This parameter specifies the ISCI host object
- * @sas_task: This parameter is the task struct from the upper layer driver.
- * @isci_request: This parameter will contain the pointer to the new
- *    isci_request object.
- * @isci_device: This parameter is the pointer to the isci remote device object
- *    that is the destination for this request.
- * @gfp_flags: This parameter specifies the os allocation flags.
+ * This method constructs the SATA request object.
+ * @sci_req:
+ * @sat_protocol:
+ * @transfer_length:
+ * @data_direction:
+ * @copy_rx_frame:
  *
- * SCI_SUCCESS on successfull completion, or specific failure code.
+ * enum sci_status
  */
-int isci_request_alloc_tmf(
-	struct isci_host *isci_host,
-	struct isci_tmf *isci_tmf,
-	struct isci_request **isci_request,
-	struct isci_remote_device *isci_device,
-	gfp_t gfp_flags)
+static enum sci_status
+scic_io_request_construct_sata(struct scic_sds_request *sci_req,
+			       u32 len,
+			       enum dma_data_direction dir,
+			       bool copy)
 {
-	int retval = isci_request_alloc_core(isci_host, isci_request,
-					     isci_device, gfp_flags);
+	enum sci_status status = SCI_SUCCESS;
+	struct isci_request *ireq = sci_req_to_ireq(sci_req);
+	struct sas_task *task = isci_request_access_task(ireq);
 
-	if (!retval) {
+	/* check for management protocols */
+	if (ireq->ttype == tmf_task) {
+		struct isci_tmf *tmf = isci_request_access_tmf(ireq);
 
-		(*isci_request)->ttype_ptr.tmf_task_ptr = isci_tmf;
-		(*isci_request)->ttype = tmf_task;
+		if (tmf->tmf_code == isci_tmf_sata_srst_high ||
+		    tmf->tmf_code == isci_tmf_sata_srst_low)
+			return scic_sds_stp_soft_reset_request_construct(sci_req);
+		else {
+			dev_err(scic_to_dev(sci_req->owning_controller),
+				"%s: Request 0x%p received un-handled SAT "
+				"management protocol 0x%x.\n",
+				__func__, sci_req, tmf->tmf_code);
+
+			return SCI_FAILURE;
+		}
 	}
-	return retval;
-}
 
-/**
- * isci_request_execute() - This function allocates the isci_request object,
- *    all fills in some common fields.
- * @isci_host: This parameter specifies the ISCI host object
- * @sas_task: This parameter is the task struct from the upper layer driver.
- * @isci_request: This parameter will contain the pointer to the new
- *    isci_request object.
- * @gfp_flags: This parameter specifies the os allocation flags.
- *
- * SCI_SUCCESS on successfull completion, or specific failure code.
- */
-int isci_request_execute(
-	struct isci_host *isci_host,
-	struct sas_task *task,
-	struct isci_request **isci_request,
-	gfp_t gfp_flags)
+	if (!sas_protocol_ata(task->task_proto)) {
+		dev_err(scic_to_dev(sci_req->owning_controller),
+			"%s: Non-ATA protocol in SATA path: 0x%x\n",
+			__func__,
+			task->task_proto);
+		return SCI_FAILURE;
+
+	}
+
+	/* non data */
+	if (task->data_dir == DMA_NONE)
+		return scic_sds_stp_non_data_request_construct(sci_req);
+
+	/* NCQ */
+	if (task->ata_task.use_ncq)
+		return scic_sds_stp_ncq_request_construct(sci_req, len, dir);
+
+	/* DMA */
+	if (task->ata_task.dma_xfer)
+		return scic_sds_stp_udma_request_construct(sci_req, len, dir);
+	else /* PIO */
+		return scic_sds_stp_pio_request_construct(sci_req, copy);
+
+	return status;
+}
+
+static enum sci_status scic_io_request_construct_basic_ssp(struct scic_sds_request *sci_req)
 {
-	int ret = 0;
-	struct scic_sds_remote_device *sci_device;
-	enum sci_status status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
-	struct isci_remote_device *isci_device;
-	struct isci_request *request;
-	unsigned long flags;
+	struct isci_request *ireq = sci_req_to_ireq(sci_req);
+	struct sas_task *task = isci_request_access_task(ireq);
 
-	isci_device = task->dev->lldd_dev;
-	sci_device = &isci_device->sci;
+	sci_req->protocol = SCIC_SSP_PROTOCOL;
 
-	/* do common allocation and init of request object. */
-	ret = isci_request_alloc_io(
-		isci_host,
-		task,
-		&request,
-		isci_device,
-		gfp_flags
-		);
+	scu_ssp_io_request_construct_task_context(sci_req,
+						  task->data_dir,
+						  task->total_xfer_len);
 
-	if (ret)
-		goto out;
+	scic_sds_io_request_build_ssp_command_iu(sci_req);
 
-	status = isci_io_request_build(isci_host, request, isci_device);
-	if (status != SCI_SUCCESS) {
-		dev_warn(&isci_host->pdev->dev,
-			 "%s: request_construct failed - status = 0x%x\n",
-			 __func__,
-			 status);
-		goto out;
-	}
+	sci_base_state_machine_change_state(
+			&sci_req->state_machine,
+			SCI_BASE_REQUEST_STATE_CONSTRUCTED);
 
-	spin_lock_irqsave(&isci_host->scic_lock, flags);
+	return SCI_SUCCESS;
+}
 
-	/* send the request, let the core assign the IO TAG.	*/
-	status = scic_controller_start_io(&isci_host->sci, sci_device,
-					  &request->sci,
-					  SCI_CONTROLLER_INVALID_IO_TAG);
-	if (status != SCI_SUCCESS &&
-	    status != SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
-		dev_warn(&isci_host->pdev->dev,
-			 "%s: failed request start (0x%x)\n",
-			 __func__, status);
-		spin_unlock_irqrestore(&isci_host->scic_lock, flags);
-		goto out;
-	}
+enum sci_status scic_task_request_construct_ssp(
+	struct scic_sds_request *sci_req)
+{
+	/* Construct the SSP Task SCU Task Context */
+	scu_ssp_task_request_construct_task_context(sci_req);
 
-	/* Either I/O started OK, or the core has signaled that
-	 * the device needs a target reset.
-	 *
-	 * In either case, hold onto the I/O for later.
-	 *
-	 * Update it's status and add it to the list in the
-	 * remote device object.
-	 */
-	isci_request_change_state(request, started);
-	list_add(&request->dev_node, &isci_device->reqs_in_process);
+	/* Fill in the SSP Task IU */
+	scic_sds_task_request_build_ssp_task_iu(sci_req);
 
-	if (status == SCI_SUCCESS) {
-		/* Save the tag for possible task mgmt later. */
-		request->io_tag = scic_io_request_get_io_tag(&request->sci);
-	} else {
-		/* The request did not really start in the
-		 * hardware, so clear the request handle
-		 * here so no terminations will be done.
-		 */
-		request->terminated = true;
-	}
-	spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+	sci_base_state_machine_change_state(&sci_req->state_machine,
+		SCI_BASE_REQUEST_STATE_CONSTRUCTED);
 
-	if (status ==
-	    SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
-		/* Signal libsas that we need the SCSI error
-		* handler thread to work on this I/O and that
-		* we want a device reset.
-		*/
-		spin_lock_irqsave(&task->task_state_lock, flags);
-		task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
-		spin_unlock_irqrestore(&task->task_state_lock, flags);
+	return SCI_SUCCESS;
+}
 
-		/* Cause this task to be scheduled in the SCSI error
-		* handler thread.
-		*/
-		isci_execpath_callback(isci_host, task,
-				       sas_task_abort);
 
-		/* Change the status, since we are holding
-		* the I/O until it is managed by the SCSI
-		* error handler.
-		*/
-		status = SCI_SUCCESS;
-	}
+static enum sci_status scic_io_request_construct_basic_sata(struct scic_sds_request *sci_req)
+{
+	enum sci_status status;
+	struct scic_sds_stp_request *stp_req;
+	bool copy = false;
+	struct isci_request *isci_request = sci_req_to_ireq(sci_req);
+	struct sas_task *task = isci_request_access_task(isci_request);
 
- out:
-	if (status != SCI_SUCCESS) {
-		/* release dma memory on failure. */
-		isci_request_free(isci_host, request);
-		request = NULL;
-		ret = SCI_FAILURE;
-	}
+	stp_req = &sci_req->stp.req;
+	sci_req->protocol = SCIC_STP_PROTOCOL;
 
-	*isci_request = request;
-	return ret;
+	copy = (task->data_dir == DMA_NONE) ? false : true;
+
+	status = scic_io_request_construct_sata(sci_req,
+						task->total_xfer_len,
+						task->data_dir,
+						copy);
+
+	if (status == SCI_SUCCESS)
+		sci_base_state_machine_change_state(&sci_req->state_machine,
+			SCI_BASE_REQUEST_STATE_CONSTRUCTED);
+
+	return status;
 }
 
 
+enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req)
+{
+	enum sci_status status = SCI_SUCCESS;
+	struct isci_request *ireq = sci_req_to_ireq(sci_req);
+
+	/* check for management protocols */
+	if (ireq->ttype == tmf_task) {
+		struct isci_tmf *tmf = isci_request_access_tmf(ireq);
+
+		if (tmf->tmf_code == isci_tmf_sata_srst_high ||
+		    tmf->tmf_code == isci_tmf_sata_srst_low) {
+			status = scic_sds_stp_soft_reset_request_construct(sci_req);
+		} else {
+			dev_err(scic_to_dev(sci_req->owning_controller),
+				"%s: Request 0x%p received un-handled SAT "
+				"Protocol 0x%x.\n",
+				__func__, sci_req, tmf->tmf_code);
+
+			return SCI_FAILURE;
+		}
+	}
+
+	if (status == SCI_SUCCESS)
+		sci_base_state_machine_change_state(
+				&sci_req->state_machine,
+				SCI_BASE_REQUEST_STATE_CONSTRUCTED);
+
+	return status;
+}
+
 /**
- * isci_request_process_response_iu() - This function sets the status and
- *    response iu, in the task struct, from the request object for the upper
- *    layer driver.
- * @sas_task: This parameter is the task struct from the upper layer driver.
- * @resp_iu: This parameter points to the response iu of the completed request.
- * @dev: This parameter specifies the linux device struct.
- *
- * none.
+ * sci_req_tx_bytes - bytes transferred when reply underruns request
+ * @sci_req: request that was terminated early
  */
-static void isci_request_process_response_iu(
-	struct sas_task *task,
-	struct ssp_response_iu *resp_iu,
-	struct device *dev)
+#define SCU_TASK_CONTEXT_SRAM 0x200000
+static u32 sci_req_tx_bytes(struct scic_sds_request *sci_req)
 {
-	dev_dbg(dev,
-		"%s: resp_iu = %p "
-		"resp_iu->status = 0x%x,\nresp_iu->datapres = %d "
-		"resp_iu->response_data_len = %x, "
-		"resp_iu->sense_data_len = %x\nrepsonse data: ",
+	struct scic_sds_controller *scic = sci_req->owning_controller;
+	u32 ret_val = 0;
+
+	if (readl(&scic->smu_registers->address_modifier) == 0) {
+		void __iomem *scu_reg_base = scic->scu_registers;
+
+		/* get the bytes of data from the Address == BAR1 + 20002Ch + (256*TCi) where
+		 *   BAR1 is the scu_registers
+		 *   0x20002C = 0x200000 + 0x2c
+		 *            = start of task context SRAM + offset of (type.ssp.data_offset)
+		 *   TCi is the io_tag of struct scic_sds_request
+		 */
+		ret_val = readl(scu_reg_base +
+				(SCU_TASK_CONTEXT_SRAM + offsetof(struct scu_task_context, type.ssp.data_offset)) +
+				((sizeof(struct scu_task_context)) * scic_sds_io_tag_get_index(sci_req->io_tag)));
+	}
+
+	return ret_val;
+}
+
+enum sci_status
+scic_sds_request_start(struct scic_sds_request *request)
+{
+	if (request->device_sequence !=
+	    scic_sds_remote_device_get_sequence(request->target_device))
+		return SCI_FAILURE;
+
+	if (request->state_handlers->start_handler)
+		return request->state_handlers->start_handler(request);
+
+	dev_warn(scic_to_dev(request->owning_controller),
+		 "%s: SCIC IO Request requested to start while in wrong "
+		 "state %d\n",
+		 __func__,
+		 sci_base_state_machine_get_state(&request->state_machine));
+
+	return SCI_FAILURE_INVALID_STATE;
+}
+
+enum sci_status
+scic_sds_io_request_terminate(struct scic_sds_request *request)
+{
+	if (request->state_handlers->abort_handler)
+		return request->state_handlers->abort_handler(request);
+
+	dev_warn(scic_to_dev(request->owning_controller),
+		"%s: SCIC IO Request requested to abort while in wrong "
+		"state %d\n",
 		__func__,
-		resp_iu,
-		resp_iu->status,
-		resp_iu->datapres,
-		resp_iu->response_data_len,
-		resp_iu->sense_data_len);
+		sci_base_state_machine_get_state(&request->state_machine));
 
-	task->task_status.stat = resp_iu->status;
+	return SCI_FAILURE_INVALID_STATE;
+}
 
-	/* libsas updates the task status fields based on the response iu. */
-	sas_ssp_task_response(dev, task, resp_iu);
+enum sci_status scic_sds_io_request_event_handler(
+	struct scic_sds_request *request,
+	u32 event_code)
+{
+	if (request->state_handlers->event_handler)
+		return request->state_handlers->event_handler(request, event_code);
+
+	dev_warn(scic_to_dev(request->owning_controller),
+		 "%s: SCIC IO Request given event code notification %x while "
+		 "in wrong state %d\n",
+		 __func__,
+		 event_code,
+		 sci_base_state_machine_get_state(&request->state_machine));
+
+	return SCI_FAILURE_INVALID_STATE;
 }
 
 /**
- * isci_request_set_open_reject_status() - This function prepares the I/O
- *    completion for OPEN_REJECT conditions.
- * @request: This parameter is the completed isci_request object.
- * @response_ptr: This parameter specifies the service response for the I/O.
- * @status_ptr: This parameter specifies the exec status for the I/O.
- * @complete_to_host_ptr: This parameter specifies the action to be taken by
- *    the LLDD with respect to completing this request or forcing an abort
- *    condition on the I/O.
- * @open_rej_reason: This parameter specifies the encoded reason for the
- *    abandon-class reject.
  *
- * none.
+ * @sci_req: The SCIC_SDS_IO_REQUEST_T object for which the start
+ *    operation is to be executed.
+ * @frame_index: The frame index returned by the hardware for the reqeust
+ *    object.
+ *
+ * This method invokes the core state frame handler for the
+ * SCIC_SDS_IO_REQUEST_T object. enum sci_status
  */
-static void isci_request_set_open_reject_status(
-	struct isci_request *request,
-	struct sas_task *task,
-	enum service_response *response_ptr,
-	enum exec_status *status_ptr,
-	enum isci_completion_selection *complete_to_host_ptr,
-	enum sas_open_rej_reason open_rej_reason)
+enum sci_status scic_sds_io_request_frame_handler(
+	struct scic_sds_request *request,
+	u32 frame_index)
 {
-	/* Task in the target is done. */
-	request->complete_in_target       = true;
-	*response_ptr                     = SAS_TASK_UNDELIVERED;
-	*status_ptr                       = SAS_OPEN_REJECT;
-	*complete_to_host_ptr             = isci_perform_normal_io_completion;
-	task->task_status.open_rej_reason = open_rej_reason;
+	if (request->state_handlers->frame_handler)
+		return request->state_handlers->frame_handler(request, frame_index);
+
+	dev_warn(scic_to_dev(request->owning_controller),
+		 "%s: SCIC IO Request given unexpected frame %x while in "
+		 "state %d\n",
+		 __func__,
+		 frame_index,
+		 sci_base_state_machine_get_state(&request->state_machine));
+
+	scic_sds_controller_release_frame(request->owning_controller, frame_index);
+	return SCI_FAILURE_INVALID_STATE;
 }
 
-/**
- * isci_request_handle_controller_specific_errors() - This function decodes
- *    controller-specific I/O completion error conditions.
- * @request: This parameter is the completed isci_request object.
- * @response_ptr: This parameter specifies the service response for the I/O.
- * @status_ptr: This parameter specifies the exec status for the I/O.
- * @complete_to_host_ptr: This parameter specifies the action to be taken by
- *    the LLDD with respect to completing this request or forcing an abort
- *    condition on the I/O.
- *
- * none.
+/*
+ * This function copies response data for requests returning response data
+ *    instead of sense data.
+ * @sci_req: This parameter specifies the request object for which to copy
+ *    the response data.
  */
-static void isci_request_handle_controller_specific_errors(
-	struct isci_remote_device *isci_device,
-	struct isci_request *request,
-	struct sas_task *task,
-	enum service_response *response_ptr,
-	enum exec_status *status_ptr,
-	enum isci_completion_selection *complete_to_host_ptr)
+void scic_sds_io_request_copy_response(struct scic_sds_request *sci_req)
 {
-	unsigned int cstatus;
+	void *resp_buf;
+	u32 len;
+	struct ssp_response_iu *ssp_response;
+	struct isci_request *ireq = sci_req_to_ireq(sci_req);
+	struct isci_tmf *isci_tmf = isci_request_access_tmf(ireq);
 
-	cstatus = scic_request_get_controller_status(&request->sci);
+	ssp_response = &sci_req->ssp.rsp;
 
-	dev_dbg(&request->isci_host->pdev->dev,
-		"%s: %p SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR "
-		"- controller status = 0x%x\n",
-		__func__, request, cstatus);
+	resp_buf = &isci_tmf->resp.resp_iu;
 
-	/* Decode the controller-specific errors; most
-	 * important is to recognize those conditions in which
-	 * the target may still have a task outstanding that
-	 * must be aborted.
-	 *
-	 * Note that there are SCU completion codes being
-	 * named in the decode below for which SCIC has already
-	 * done work to handle them in a way other than as
-	 * a controller-specific completion code; these are left
-	 * in the decode below for completeness sake.
-	 */
-	switch (cstatus) {
-	case SCU_TASK_DONE_DMASETUP_DIRERR:
-	/* Also SCU_TASK_DONE_SMP_FRM_TYPE_ERR: */
-	case SCU_TASK_DONE_XFERCNT_ERR:
-		/* Also SCU_TASK_DONE_SMP_UFI_ERR: */
-		if (task->task_proto == SAS_PROTOCOL_SMP) {
-			/* SCU_TASK_DONE_SMP_UFI_ERR == Task Done. */
-			*response_ptr = SAS_TASK_COMPLETE;
+	len = min_t(u32,
+		    SSP_RESP_IU_MAX_SIZE,
+		    be32_to_cpu(ssp_response->response_data_len));
 
-			/* See if the device has been/is being stopped. Note
-			 * that we ignore the quiesce state, since we are
-			 * concerned about the actual device state.
-			 */
-			if ((isci_device->status == isci_stopping) ||
-			    (isci_device->status == isci_stopped))
-				*status_ptr = SAS_DEVICE_UNKNOWN;
-			else
-				*status_ptr = SAS_ABORTED_TASK;
+	memcpy(resp_buf, ssp_response->resp_data, len);
+}
 
-			request->complete_in_target = true;
+/*
+ * This method implements the action taken when a constructed
+ * SCIC_SDS_IO_REQUEST_T object receives a scic_sds_request_start() request.
+ * This method will, if necessary, allocate a TCi for the io request object and
+ * then will, if necessary, copy the constructed TC data into the actual TC
+ * buffer.  If everything is successful the post context field is updated with
+ * the TCi so the controller can post the request to the hardware. enum sci_status
+ * SCI_SUCCESS SCI_FAILURE_INSUFFICIENT_RESOURCES
+ */
+static enum sci_status scic_sds_request_constructed_state_start_handler(
+	struct scic_sds_request *request)
+{
+	struct scu_task_context *task_context;
 
-			*complete_to_host_ptr =
-				isci_perform_normal_io_completion;
-		} else {
-			/* Task in the target is not done. */
-			*response_ptr = SAS_TASK_UNDELIVERED;
+	if (request->io_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
+		request->io_tag =
+			scic_controller_allocate_io_tag(request->owning_controller);
+	}
 
-			if ((isci_device->status == isci_stopping) ||
-			    (isci_device->status == isci_stopped))
-				*status_ptr = SAS_DEVICE_UNKNOWN;
-			else
-				*status_ptr = SAM_STAT_TASK_ABORTED;
+	/* Record the IO Tag in the request */
+	if (request->io_tag != SCI_CONTROLLER_INVALID_IO_TAG) {
+		task_context = request->task_context_buffer;
 
-			request->complete_in_target = false;
+		task_context->task_index = scic_sds_io_tag_get_index(request->io_tag);
 
-			*complete_to_host_ptr =
-				isci_perform_error_io_completion;
-		}
+		switch (task_context->protocol_type) {
+		case SCU_TASK_CONTEXT_PROTOCOL_SMP:
+		case SCU_TASK_CONTEXT_PROTOCOL_SSP:
+			/* SSP/SMP Frame */
+			task_context->type.ssp.tag = request->io_tag;
+			task_context->type.ssp.target_port_transfer_tag = 0xFFFF;
+			break;
 
-		break;
+		case SCU_TASK_CONTEXT_PROTOCOL_STP:
+			/*
+			 * STP/SATA Frame
+			 * task_context->type.stp.ncq_tag = request->ncq_tag; */
+			break;
 
-	case SCU_TASK_DONE_CRC_ERR:
-	case SCU_TASK_DONE_NAK_CMD_ERR:
-	case SCU_TASK_DONE_EXCESS_DATA:
-	case SCU_TASK_DONE_UNEXP_FIS:
-	/* Also SCU_TASK_DONE_UNEXP_RESP: */
-	case SCU_TASK_DONE_VIIT_ENTRY_NV:       /* TODO - conditions? */
-	case SCU_TASK_DONE_IIT_ENTRY_NV:        /* TODO - conditions? */
-	case SCU_TASK_DONE_RNCNV_OUTBOUND:      /* TODO - conditions? */
-		/* These are conditions in which the target
-		 * has completed the task, so that no cleanup
-		 * is necessary.
-		 */
-		*response_ptr = SAS_TASK_COMPLETE;
+		case SCU_TASK_CONTEXT_PROTOCOL_NONE:
+			/* / @todo When do we set no protocol type? */
+			break;
 
-		/* See if the device has been/is being stopped. Note
-		 * that we ignore the quiesce state, since we are
-		 * concerned about the actual device state.
-		 */
-		if ((isci_device->status == isci_stopping) ||
-		    (isci_device->status == isci_stopped))
-			*status_ptr = SAS_DEVICE_UNKNOWN;
-		else
-			*status_ptr = SAS_ABORTED_TASK;
+		default:
+			/* This should never happen since we build the IO requests */
+			break;
+		}
 
-		request->complete_in_target = true;
+		/*
+		 * Check to see if we need to copy the task context buffer
+		 * or have been building into the task context buffer */
+		if (request->was_tag_assigned_by_user == false) {
+			scic_sds_controller_copy_task_context(
+				request->owning_controller, request);
+		}
 
-		*complete_to_host_ptr = isci_perform_normal_io_completion;
-		break;
+		/* Add to the post_context the io tag value */
+		request->post_context |= scic_sds_io_tag_get_index(request->io_tag);
 
+		/* Everything is good go ahead and change state */
+		sci_base_state_machine_change_state(&request->state_machine,
+			SCI_BASE_REQUEST_STATE_STARTED);
 
-	/* Note that the only open reject completion codes seen here will be
-	 * abandon-class codes; all others are automatically retried in the SCU.
-	 */
-	case SCU_TASK_OPEN_REJECT_WRONG_DESTINATION:
+		return SCI_SUCCESS;
+	}
 
-		isci_request_set_open_reject_status(
-			request, task, response_ptr, status_ptr,
-			complete_to_host_ptr, SAS_OREJ_WRONG_DEST);
-		break;
+	return SCI_FAILURE_INSUFFICIENT_RESOURCES;
+}
 
-	case SCU_TASK_OPEN_REJECT_ZONE_VIOLATION:
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_terminate() request. Since the request
+ * has not yet been posted to the hardware the request transitions to the
+ * completed state. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_request_constructed_state_abort_handler(
+	struct scic_sds_request *request)
+{
+	/*
+	 * This request has been terminated by the user make sure that the correct
+	 * status code is returned */
+	scic_sds_request_set_status(request,
+		SCU_TASK_DONE_TASK_ABORT,
+		SCI_FAILURE_IO_TERMINATED);
+
+	sci_base_state_machine_change_state(&request->state_machine,
+		SCI_BASE_REQUEST_STATE_COMPLETED);
+	return SCI_SUCCESS;
+}
 
-		/* Note - the return of AB0 will change when
-		 * libsas implements detection of zone violations.
-		 */
-		isci_request_set_open_reject_status(
-			request, task, response_ptr, status_ptr,
-			complete_to_host_ptr, SAS_OREJ_RESV_AB0);
-		break;
+/*
+ * *****************************************************************************
+ * *  STARTED STATE HANDLERS
+ * ***************************************************************************** */
 
-	case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1:
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_terminate() request. Since the request
+ * has been posted to the hardware the io request state is changed to the
+ * aborting state. enum sci_status SCI_SUCCESS
+ */
+enum sci_status scic_sds_request_started_state_abort_handler(
+	struct scic_sds_request *request)
+{
+	if (request->has_started_substate_machine)
+		sci_base_state_machine_stop(&request->started_substate_machine);
 
-		isci_request_set_open_reject_status(
-			request, task, response_ptr, status_ptr,
-			complete_to_host_ptr, SAS_OREJ_RESV_AB1);
-		break;
+	sci_base_state_machine_change_state(&request->state_machine,
+		SCI_BASE_REQUEST_STATE_ABORTING);
+	return SCI_SUCCESS;
+}
 
-	case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2:
+/*
+ * scic_sds_request_started_state_tc_completion_handler() - This method process
+ *    TC (task context) completions for normal IO request (i.e. Task/Abort
+ *    Completions of type 0).  This method will update the
+ *    SCIC_SDS_IO_REQUEST_T::status field.
+ * @sci_req: This parameter specifies the request for which a completion
+ *    occurred.
+ * @completion_code: This parameter specifies the completion code received from
+ *    the SCU.
+ *
+ */
+static enum sci_status
+scic_sds_request_started_state_tc_completion_handler(struct scic_sds_request *sci_req,
+						     u32 completion_code)
+{
+	u8 datapres;
+	struct ssp_response_iu *resp_iu;
 
-		isci_request_set_open_reject_status(
-			request, task, response_ptr, status_ptr,
-			complete_to_host_ptr, SAS_OREJ_RESV_AB2);
+	/*
+	 * TODO: Any SDMA return code of other than 0 is bad
+	 *       decode 0x003C0000 to determine SDMA status
+	 */
+	switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_GOOD):
+		scic_sds_request_set_status(sci_req,
+					    SCU_TASK_DONE_GOOD,
+					    SCI_SUCCESS);
 		break;
 
-	case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3:
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EARLY_RESP):
+	{
+		/*
+		 * There are times when the SCU hardware will return an early
+		 * response because the io request specified more data than is
+		 * returned by the target device (mode pages, inquiry data,
+		 * etc.).  We must check the response stats to see if this is
+		 * truly a failed request or a good request that just got
+		 * completed early.
+		 */
+		struct ssp_response_iu *resp = &sci_req->ssp.rsp;
+		ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
+
+		sci_swab32_cpy(&sci_req->ssp.rsp,
+			       &sci_req->ssp.rsp,
+			       word_cnt);
+
+		if (resp->status == 0) {
+			scic_sds_request_set_status(
+				sci_req,
+				SCU_TASK_DONE_GOOD,
+				SCI_SUCCESS_IO_DONE_EARLY);
+		} else {
+			scic_sds_request_set_status(
+				sci_req,
+				SCU_TASK_DONE_CHECK_RESPONSE,
+				SCI_FAILURE_IO_RESPONSE_VALID);
+		}
+	}
+	break;
 
-		isci_request_set_open_reject_status(
-			request, task, response_ptr, status_ptr,
-			complete_to_host_ptr, SAS_OREJ_RESV_AB3);
-		break;
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_CHECK_RESPONSE):
+	{
+		ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
 
-	case SCU_TASK_OPEN_REJECT_BAD_DESTINATION:
+		sci_swab32_cpy(&sci_req->ssp.rsp,
+			       &sci_req->ssp.rsp,
+			       word_cnt);
 
-		isci_request_set_open_reject_status(
-			request, task, response_ptr, status_ptr,
-			complete_to_host_ptr, SAS_OREJ_BAD_DEST);
+		scic_sds_request_set_status(sci_req,
+					    SCU_TASK_DONE_CHECK_RESPONSE,
+					    SCI_FAILURE_IO_RESPONSE_VALID);
 		break;
+	}
 
-	case SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY:
-
-		isci_request_set_open_reject_status(
-			request, task, response_ptr, status_ptr,
-			complete_to_host_ptr, SAS_OREJ_STP_NORES);
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RESP_LEN_ERR):
+		/*
+		 * / @todo With TASK_DONE_RESP_LEN_ERR is the response frame
+		 * guaranteed to be received before this completion status is
+		 * posted?
+		 */
+		resp_iu = &sci_req->ssp.rsp;
+		datapres = resp_iu->datapres;
+
+		if ((datapres == 0x01) || (datapres == 0x02)) {
+			scic_sds_request_set_status(
+				sci_req,
+				SCU_TASK_DONE_CHECK_RESPONSE,
+				SCI_FAILURE_IO_RESPONSE_VALID);
+		} else
+			scic_sds_request_set_status(
+				sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS);
 		break;
 
-	case SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED:
-
-		isci_request_set_open_reject_status(
-			request, task, response_ptr, status_ptr,
-			complete_to_host_ptr, SAS_OREJ_EPROTO);
+	/* only stp device gets suspended. */
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_ACK_NAK_TO):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_PERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_DATA_LEN_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LL_ABORT_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_WD_LEN):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_MAX_PLD_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_RESP):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_SDBFIS):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_REG_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDB_ERR):
+		if (sci_req->protocol == SCIC_STP_PROTOCOL) {
+			scic_sds_request_set_status(
+				sci_req,
+				SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
+				SCU_COMPLETION_TL_STATUS_SHIFT,
+				SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED);
+		} else {
+			scic_sds_request_set_status(
+				sci_req,
+				SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
+				SCU_COMPLETION_TL_STATUS_SHIFT,
+				SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
+		}
 		break;
 
-	case SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED:
-
-		isci_request_set_open_reject_status(
-			request, task, response_ptr, status_ptr,
-			complete_to_host_ptr, SAS_OREJ_CONN_RATE);
+	/* both stp/ssp device gets suspended */
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_LF_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_WRONG_DESTINATION):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_BAD_DESTINATION):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_ZONE_VIOLATION):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED):
+		scic_sds_request_set_status(
+			sci_req,
+			SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
+			SCU_COMPLETION_TL_STATUS_SHIFT,
+			SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED);
 		break;
 
-	case SCU_TASK_DONE_LL_R_ERR:
-	/* Also SCU_TASK_DONE_ACK_NAK_TO: */
-	case SCU_TASK_DONE_LL_PERR:
-	case SCU_TASK_DONE_LL_SY_TERM:
-	/* Also SCU_TASK_DONE_NAK_ERR:*/
-	case SCU_TASK_DONE_LL_LF_TERM:
-	/* Also SCU_TASK_DONE_DATA_LEN_ERR: */
-	case SCU_TASK_DONE_LL_ABORT_ERR:
-	case SCU_TASK_DONE_SEQ_INV_TYPE:
-	/* Also SCU_TASK_DONE_UNEXP_XR: */
-	case SCU_TASK_DONE_XR_IU_LEN_ERR:
-	case SCU_TASK_DONE_INV_FIS_LEN:
-	/* Also SCU_TASK_DONE_XR_WD_LEN: */
-	case SCU_TASK_DONE_SDMA_ERR:
-	case SCU_TASK_DONE_OFFSET_ERR:
-	case SCU_TASK_DONE_MAX_PLD_ERR:
-	case SCU_TASK_DONE_LF_ERR:
-	case SCU_TASK_DONE_SMP_RESP_TO_ERR:  /* Escalate to dev reset? */
-	case SCU_TASK_DONE_SMP_LL_RX_ERR:
-	case SCU_TASK_DONE_UNEXP_DATA:
-	case SCU_TASK_DONE_UNEXP_SDBFIS:
-	case SCU_TASK_DONE_REG_ERR:
-	case SCU_TASK_DONE_SDB_ERR:
-	case SCU_TASK_DONE_TASK_ABORT:
+	/* neither ssp nor stp gets suspended. */
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_NAK_CMD_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_XR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_XR_IU_LEN_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SDMA_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OFFSET_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_EXCESS_DATA):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_RESP_TO_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_UFI_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_FRM_TYPE_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_SMP_LL_RX_ERR):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_UNEXP_DATA):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_OPEN_FAIL):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_VIIT_ENTRY_NV):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_IIT_ENTRY_NV):
+	case SCU_MAKE_COMPLETION_STATUS(SCU_TASK_DONE_RNCNV_OUTBOUND):
 	default:
-		/* Task in the target is not done. */
-		*response_ptr = SAS_TASK_UNDELIVERED;
-		*status_ptr = SAM_STAT_TASK_ABORTED;
-		request->complete_in_target = false;
-
-		*complete_to_host_ptr = isci_perform_error_io_completion;
+		scic_sds_request_set_status(
+			sci_req,
+			SCU_GET_COMPLETION_TL_STATUS(completion_code) >>
+			SCU_COMPLETION_TL_STATUS_SHIFT,
+			SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
 		break;
 	}
+
+	/*
+	 * TODO: This is probably wrong for ACK/NAK timeout conditions
+	 */
+
+	/* In all cases we will treat this as the completion of the IO req. */
+	sci_base_state_machine_change_state(
+			&sci_req->state_machine,
+			SCI_BASE_REQUEST_STATE_COMPLETED);
+	return SCI_SUCCESS;
 }
 
-/**
- * isci_task_save_for_upper_layer_completion() - This function saves the
- *    request for later completion to the upper layer driver.
- * @host: This parameter is a pointer to the host on which the the request
- *    should be queued (either as an error or success).
- * @request: This parameter is the completed request.
- * @response: This parameter is the response code for the completed task.
- * @status: This parameter is the status code for the completed task.
- *
- * none.
- */
-static void isci_task_save_for_upper_layer_completion(
-	struct isci_host *host,
-	struct isci_request *request,
-	enum service_response response,
-	enum exec_status status,
-	enum isci_completion_selection task_notification_selection)
+enum sci_status
+scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completion_code)
 {
-	struct sas_task *task = isci_request_access_task(request);
-
-	task_notification_selection
-		= isci_task_set_completion_status(task, response, status,
-						  task_notification_selection);
+	if (request->state_machine.current_state_id == SCI_BASE_REQUEST_STATE_STARTED &&
+	    request->has_started_substate_machine == false)
+		return scic_sds_request_started_state_tc_completion_handler(request, completion_code);
+	else if (request->state_handlers->tc_completion_handler)
+		return request->state_handlers->tc_completion_handler(request, completion_code);
+
+	dev_warn(scic_to_dev(request->owning_controller),
+		"%s: SCIC IO Request given task completion notification %x "
+		"while in wrong state %d\n",
+		__func__,
+		completion_code,
+		sci_base_state_machine_get_state(&request->state_machine));
 
-	/* Tasks aborted specifically by a call to the lldd_abort_task
-	 * function should not be completed to the host in the regular path.
-	 */
-	switch (task_notification_selection) {
+	return SCI_FAILURE_INVALID_STATE;
 
-	case isci_perform_normal_io_completion:
+}
 
-		/* Normal notification (task_done) */
-		dev_dbg(&host->pdev->dev,
-			"%s: Normal - task = %p, response=%d (%d), status=%d (%d)\n",
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_frame_handler() request. This method
+ * first determines the frame type received.  If this is a response frame then
+ * the response data is copied to the io request response buffer for processing
+ * at completion time. If the frame type is not a response buffer an error is
+ * logged. enum sci_status SCI_SUCCESS SCI_FAILURE_INVALID_PARAMETER_VALUE
+ */
+static enum sci_status
+scic_sds_request_started_state_frame_handler(struct scic_sds_request *sci_req,
+					     u32 frame_index)
+{
+	enum sci_status status;
+	u32 *frame_header;
+	struct ssp_frame_hdr ssp_hdr;
+	ssize_t word_cnt;
+
+	status = scic_sds_unsolicited_frame_control_get_header(
+		&(scic_sds_request_get_controller(sci_req)->uf_control),
+		frame_index,
+		(void **)&frame_header);
+
+	word_cnt = sizeof(struct ssp_frame_hdr) / sizeof(u32);
+	sci_swab32_cpy(&ssp_hdr, frame_header, word_cnt);
+
+	if (ssp_hdr.frame_type == SSP_RESPONSE) {
+		struct ssp_response_iu *resp_iu;
+		ssize_t word_cnt = SSP_RESP_IU_MAX_SIZE / sizeof(u32);
+
+		status = scic_sds_unsolicited_frame_control_get_buffer(
+			&(scic_sds_request_get_controller(sci_req)->uf_control),
+			frame_index,
+			(void **)&resp_iu);
+
+		sci_swab32_cpy(&sci_req->ssp.rsp,
+			       resp_iu, word_cnt);
+
+		resp_iu = &sci_req->ssp.rsp;
+
+		if ((resp_iu->datapres == 0x01) ||
+		    (resp_iu->datapres == 0x02)) {
+			scic_sds_request_set_status(
+				sci_req,
+				SCU_TASK_DONE_CHECK_RESPONSE,
+				SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR);
+		} else
+			scic_sds_request_set_status(
+				sci_req, SCU_TASK_DONE_GOOD, SCI_SUCCESS);
+	} else {
+		/* This was not a response frame why did it get forwarded? */
+		dev_err(scic_to_dev(sci_req->owning_controller),
+			"%s: SCIC IO Request 0x%p received unexpected "
+			"frame %d type 0x%02x\n",
 			__func__,
-			task,
-			task->task_status.resp, response,
-			task->task_status.stat, status);
-		/* Add to the completed list. */
-		list_add(&request->completed_node,
-			 &host->requests_to_complete);
+			sci_req,
+			frame_index,
+			ssp_hdr.frame_type);
+	}
 
-		/* Take the request off the device's pending request list. */
-		list_del_init(&request->dev_node);
-		break;
+	/*
+	 * In any case we are done with this frame buffer return it to the
+	 * controller
+	 */
+	scic_sds_controller_release_frame(
+		sci_req->owning_controller, frame_index);
 
-	case isci_perform_aborted_io_completion:
-		/* No notification to libsas because this request is
-		 * already in the abort path.
-		 */
-		dev_warn(&host->pdev->dev,
-			 "%s: Aborted - task = %p, response=%d (%d), status=%d (%d)\n",
-			 __func__,
-			 task,
-			 task->task_status.resp, response,
-			 task->task_status.stat, status);
+	return SCI_SUCCESS;
+}
 
-		/* Wake up whatever process was waiting for this
-		 * request to complete.
-		 */
-		WARN_ON(request->io_request_completion == NULL);
+/*
+ * *****************************************************************************
+ * *  COMPLETED STATE HANDLERS
+ * ***************************************************************************** */
 
-		if (request->io_request_completion != NULL) {
 
-			/* Signal whoever is waiting that this
-			* request is complete.
-			*/
-			complete(request->io_request_completion);
-		}
-		break;
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_complete() request. This method frees up
+ * any io request resources that have been allocated and transitions the
+ * request to its final state. Consider stopping the state machine instead of
+ * transitioning to the final state? enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_request_completed_state_complete_handler(
+	struct scic_sds_request *request)
+{
+	if (request->was_tag_assigned_by_user != true) {
+		scic_controller_free_io_tag(
+			request->owning_controller, request->io_tag);
+	}
 
-	case isci_perform_error_io_completion:
-		/* Use sas_task_abort */
-		dev_warn(&host->pdev->dev,
-			 "%s: Error - task = %p, response=%d (%d), status=%d (%d)\n",
-			 __func__,
-			 task,
-			 task->task_status.resp, response,
-			 task->task_status.stat, status);
-		/* Add to the aborted list. */
-		list_add(&request->completed_node,
-			 &host->requests_to_errorback);
-		break;
+	if (request->saved_rx_frame_index != SCU_INVALID_FRAME_INDEX) {
+		scic_sds_controller_release_frame(
+			request->owning_controller, request->saved_rx_frame_index);
+	}
 
-	default:
-		dev_warn(&host->pdev->dev,
-			 "%s: Unknown - task = %p, response=%d (%d), status=%d (%d)\n",
-			 __func__,
-			 task,
-			 task->task_status.resp, response,
-			 task->task_status.stat, status);
+	sci_base_state_machine_change_state(&request->state_machine,
+		SCI_BASE_REQUEST_STATE_FINAL);
+	return SCI_SUCCESS;
+}
 
-		/* Add to the error to libsas list. */
-		list_add(&request->completed_node,
-			 &host->requests_to_errorback);
+/*
+ * *****************************************************************************
+ * *  ABORTING STATE HANDLERS
+ * ***************************************************************************** */
+
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_terminate() request. This method is the
+ * io request aborting state abort handlers.  On receipt of a multiple
+ * terminate requests the io request will transition to the completed state.
+ * This should not happen in normal operation. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_request_aborting_state_abort_handler(
+	struct scic_sds_request *request)
+{
+	sci_base_state_machine_change_state(&request->state_machine,
+		SCI_BASE_REQUEST_STATE_COMPLETED);
+	return SCI_SUCCESS;
+}
+
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_task_completion() request. This method
+ * decodes the completion type waiting for the abort task complete
+ * notification. When the abort task complete is received the io request
+ * transitions to the completed state. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_request_aborting_state_tc_completion_handler(
+	struct scic_sds_request *sci_req,
+	u32 completion_code)
+{
+	switch (SCU_GET_COMPLETION_TL_STATUS(completion_code)) {
+	case (SCU_TASK_DONE_GOOD << SCU_COMPLETION_TL_STATUS_SHIFT):
+	case (SCU_TASK_DONE_TASK_ABORT << SCU_COMPLETION_TL_STATUS_SHIFT):
+		scic_sds_request_set_status(
+			sci_req, SCU_TASK_DONE_TASK_ABORT, SCI_FAILURE_IO_TERMINATED
+			);
+
+		sci_base_state_machine_change_state(&sci_req->state_machine,
+			SCI_BASE_REQUEST_STATE_COMPLETED);
+		break;
+
+	default:
+		/*
+		 * Unless we get some strange error wait for the task abort to complete
+		 * TODO: Should there be a state change for this completion? */
 		break;
 	}
+
+	return SCI_SUCCESS;
+}
+
+/*
+ * This method implements the action to be taken when an SCIC_SDS_IO_REQUEST_T
+ * object receives a scic_sds_request_frame_handler() request. This method
+ * discards the unsolicited frame since we are waiting for the abort task
+ * completion. enum sci_status SCI_SUCCESS
+ */
+static enum sci_status scic_sds_request_aborting_state_frame_handler(
+	struct scic_sds_request *sci_req,
+	u32 frame_index)
+{
+	/* TODO: Is it even possible to get an unsolicited frame in the aborting state? */
+
+	scic_sds_controller_release_frame(
+		sci_req->owning_controller, frame_index);
+
+	return SCI_SUCCESS;
 }
 
+static const struct scic_sds_io_request_state_handler scic_sds_request_state_handler_table[] = {
+	[SCI_BASE_REQUEST_STATE_INITIAL] = {
+	},
+	[SCI_BASE_REQUEST_STATE_CONSTRUCTED] = {
+		.start_handler		= scic_sds_request_constructed_state_start_handler,
+		.abort_handler		= scic_sds_request_constructed_state_abort_handler,
+	},
+	[SCI_BASE_REQUEST_STATE_STARTED] = {
+		.abort_handler		= scic_sds_request_started_state_abort_handler,
+		.tc_completion_handler	= scic_sds_request_started_state_tc_completion_handler,
+		.frame_handler		= scic_sds_request_started_state_frame_handler,
+	},
+	[SCI_BASE_REQUEST_STATE_COMPLETED] = {
+		.complete_handler	= scic_sds_request_completed_state_complete_handler,
+	},
+	[SCI_BASE_REQUEST_STATE_ABORTING] = {
+		.abort_handler		= scic_sds_request_aborting_state_abort_handler,
+		.tc_completion_handler	= scic_sds_request_aborting_state_tc_completion_handler,
+		.frame_handler		= scic_sds_request_aborting_state_frame_handler,
+	},
+	[SCI_BASE_REQUEST_STATE_FINAL] = {
+	},
+};
+
+
 /**
- * isci_request_io_request_complete() - This function is called by the sci core
- *    when an io request completes.
- * @isci_host: This parameter specifies the ISCI host object
- * @request: This parameter is the completed isci_request object.
- * @completion_status: This parameter specifies the completion status from the
- *    sci core.
+ * isci_request_process_response_iu() - This function sets the status and
+ *    response iu, in the task struct, from the request object for the upper
+ *    layer driver.
+ * @sas_task: This parameter is the task struct from the upper layer driver.
+ * @resp_iu: This parameter points to the response iu of the completed request.
+ * @dev: This parameter specifies the linux device struct.
  *
  * none.
  */
-void isci_request_io_request_complete(
-	struct        isci_host *isci_host,
-	struct        isci_request *request,
-	enum sci_io_status completion_status)
+static void isci_request_process_response_iu(
+	struct sas_task *task,
+	struct ssp_response_iu *resp_iu,
+	struct device *dev)
 {
-	struct sas_task *task = isci_request_access_task(request);
-	struct ssp_response_iu *resp_iu;
-	void *resp_buf;
-	unsigned long task_flags;
-	struct isci_remote_device *isci_device   = request->isci_device;
-	enum service_response response       = SAS_TASK_UNDELIVERED;
-	enum exec_status status         = SAS_ABORTED_TASK;
-	enum isci_request_status request_status;
-	enum isci_completion_selection complete_to_host
-		= isci_perform_normal_io_completion;
-
-	dev_dbg(&isci_host->pdev->dev,
-		"%s: request = %p, task = %p,\n"
-		"task->data_dir = %d completion_status = 0x%x\n",
+	dev_dbg(dev,
+		"%s: resp_iu = %p "
+		"resp_iu->status = 0x%x,\nresp_iu->datapres = %d "
+		"resp_iu->response_data_len = %x, "
+		"resp_iu->sense_data_len = %x\nrepsonse data: ",
 		__func__,
-		request,
-		task,
-		task->data_dir,
-		completion_status);
+		resp_iu,
+		resp_iu->status,
+		resp_iu->datapres,
+		resp_iu->response_data_len,
+		resp_iu->sense_data_len);
 
-	spin_lock(&request->state_lock);
-	request_status = isci_request_get_state(request);
+	task->task_status.stat = resp_iu->status;
 
-	/* Decode the request status.  Note that if the request has been
-	 * aborted by a task management function, we don't care
-	 * what the status is.
-	 */
-	switch (request_status) {
+	/* libsas updates the task status fields based on the response iu. */
+	sas_ssp_task_response(dev, task, resp_iu);
+}
 
-	case aborted:
-		/* "aborted" indicates that the request was aborted by a task
-		 * management function, since once a task management request is
-		 * perfomed by the device, the request only completes because
-		 * of the subsequent driver terminate.
-		 *
-		 * Aborted also means an external thread is explicitly managing
-		 * this request, so that we do not complete it up the stack.
-		 *
-		 * The target is still there (since the TMF was successful).
-		 */
-		request->complete_in_target = true;
-		response = SAS_TASK_COMPLETE;
+/**
+ * isci_request_set_open_reject_status() - This function prepares the I/O
+ *    completion for OPEN_REJECT conditions.
+ * @request: This parameter is the completed isci_request object.
+ * @response_ptr: This parameter specifies the service response for the I/O.
+ * @status_ptr: This parameter specifies the exec status for the I/O.
+ * @complete_to_host_ptr: This parameter specifies the action to be taken by
+ *    the LLDD with respect to completing this request or forcing an abort
+ *    condition on the I/O.
+ * @open_rej_reason: This parameter specifies the encoded reason for the
+ *    abandon-class reject.
+ *
+ * none.
+ */
+static void isci_request_set_open_reject_status(
+	struct isci_request *request,
+	struct sas_task *task,
+	enum service_response *response_ptr,
+	enum exec_status *status_ptr,
+	enum isci_completion_selection *complete_to_host_ptr,
+	enum sas_open_rej_reason open_rej_reason)
+{
+	/* Task in the target is done. */
+	request->complete_in_target       = true;
+	*response_ptr                     = SAS_TASK_UNDELIVERED;
+	*status_ptr                       = SAS_OPEN_REJECT;
+	*complete_to_host_ptr             = isci_perform_normal_io_completion;
+	task->task_status.open_rej_reason = open_rej_reason;
+}
 
-		/* See if the device has been/is being stopped. Note
-		 * that we ignore the quiesce state, since we are
-		 * concerned about the actual device state.
-		 */
-		if ((isci_device->status == isci_stopping)
-		    || (isci_device->status == isci_stopped)
-		    )
-			status = SAS_DEVICE_UNKNOWN;
-		else
-			status = SAS_ABORTED_TASK;
+/**
+ * isci_request_handle_controller_specific_errors() - This function decodes
+ *    controller-specific I/O completion error conditions.
+ * @request: This parameter is the completed isci_request object.
+ * @response_ptr: This parameter specifies the service response for the I/O.
+ * @status_ptr: This parameter specifies the exec status for the I/O.
+ * @complete_to_host_ptr: This parameter specifies the action to be taken by
+ *    the LLDD with respect to completing this request or forcing an abort
+ *    condition on the I/O.
+ *
+ * none.
+ */
+static void isci_request_handle_controller_specific_errors(
+	struct isci_remote_device *isci_device,
+	struct isci_request *request,
+	struct sas_task *task,
+	enum service_response *response_ptr,
+	enum exec_status *status_ptr,
+	enum isci_completion_selection *complete_to_host_ptr)
+{
+	unsigned int cstatus;
 
-		complete_to_host = isci_perform_aborted_io_completion;
-		/* This was an aborted request. */
+	cstatus = request->sci.scu_status;
 
-		spin_unlock(&request->state_lock);
-		break;
+	dev_dbg(&request->isci_host->pdev->dev,
+		"%s: %p SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR "
+		"- controller status = 0x%x\n",
+		__func__, request, cstatus);
 
-	case aborting:
-		/* aborting means that the task management function tried and
-		 * failed to abort the request. We need to note the request
-		 * as SAS_TASK_UNDELIVERED, so that the scsi mid layer marks the
-		 * target as down.
-		 *
-		 * Aborting also means an external thread is explicitly managing
-		 * this request, so that we do not complete it up the stack.
-		 */
-		request->complete_in_target = true;
-		response = SAS_TASK_UNDELIVERED;
+	/* Decode the controller-specific errors; most
+	 * important is to recognize those conditions in which
+	 * the target may still have a task outstanding that
+	 * must be aborted.
+	 *
+	 * Note that there are SCU completion codes being
+	 * named in the decode below for which SCIC has already
+	 * done work to handle them in a way other than as
+	 * a controller-specific completion code; these are left
+	 * in the decode below for completeness sake.
+	 */
+	switch (cstatus) {
+	case SCU_TASK_DONE_DMASETUP_DIRERR:
+	/* Also SCU_TASK_DONE_SMP_FRM_TYPE_ERR: */
+	case SCU_TASK_DONE_XFERCNT_ERR:
+		/* Also SCU_TASK_DONE_SMP_UFI_ERR: */
+		if (task->task_proto == SAS_PROTOCOL_SMP) {
+			/* SCU_TASK_DONE_SMP_UFI_ERR == Task Done. */
+			*response_ptr = SAS_TASK_COMPLETE;
 
-		if ((isci_device->status == isci_stopping) ||
-		    (isci_device->status == isci_stopped))
-			/* The device has been /is being stopped. Note that
-			 * we ignore the quiesce state, since we are
+			/* See if the device has been/is being stopped. Note
+			 * that we ignore the quiesce state, since we are
 			 * concerned about the actual device state.
 			 */
-			status = SAS_DEVICE_UNKNOWN;
-		else
-			status = SAS_PHY_DOWN;
+			if ((isci_device->status == isci_stopping) ||
+			    (isci_device->status == isci_stopped))
+				*status_ptr = SAS_DEVICE_UNKNOWN;
+			else
+				*status_ptr = SAS_ABORTED_TASK;
 
-		complete_to_host = isci_perform_aborted_io_completion;
+			request->complete_in_target = true;
 
-		/* This was an aborted request. */
+			*complete_to_host_ptr =
+				isci_perform_normal_io_completion;
+		} else {
+			/* Task in the target is not done. */
+			*response_ptr = SAS_TASK_UNDELIVERED;
 
-		spin_unlock(&request->state_lock);
-		break;
+			if ((isci_device->status == isci_stopping) ||
+			    (isci_device->status == isci_stopped))
+				*status_ptr = SAS_DEVICE_UNKNOWN;
+			else
+				*status_ptr = SAM_STAT_TASK_ABORTED;
 
-	case terminating:
+			request->complete_in_target = false;
 
-		/* This was an terminated request.  This happens when
-		 * the I/O is being terminated because of an action on
-		 * the device (reset, tear down, etc.), and the I/O needs
-		 * to be completed up the stack.
+			*complete_to_host_ptr =
+				isci_perform_error_io_completion;
+		}
+
+		break;
+
+	case SCU_TASK_DONE_CRC_ERR:
+	case SCU_TASK_DONE_NAK_CMD_ERR:
+	case SCU_TASK_DONE_EXCESS_DATA:
+	case SCU_TASK_DONE_UNEXP_FIS:
+	/* Also SCU_TASK_DONE_UNEXP_RESP: */
+	case SCU_TASK_DONE_VIIT_ENTRY_NV:       /* TODO - conditions? */
+	case SCU_TASK_DONE_IIT_ENTRY_NV:        /* TODO - conditions? */
+	case SCU_TASK_DONE_RNCNV_OUTBOUND:      /* TODO - conditions? */
+		/* These are conditions in which the target
+		 * has completed the task, so that no cleanup
+		 * is necessary.
 		 */
-		request->complete_in_target = true;
-		response = SAS_TASK_UNDELIVERED;
+		*response_ptr = SAS_TASK_COMPLETE;
 
 		/* See if the device has been/is being stopped. Note
 		 * that we ignore the quiesce state, since we are
@@ -953,208 +1341,1206 @@ void isci_request_io_request_complete(
 		 */
 		if ((isci_device->status == isci_stopping) ||
 		    (isci_device->status == isci_stopped))
-			status = SAS_DEVICE_UNKNOWN;
+			*status_ptr = SAS_DEVICE_UNKNOWN;
 		else
-			status = SAS_ABORTED_TASK;
-
-		complete_to_host = isci_perform_aborted_io_completion;
+			*status_ptr = SAS_ABORTED_TASK;
 
-		/* This was a terminated request. */
+		request->complete_in_target = true;
 
-		spin_unlock(&request->state_lock);
+		*complete_to_host_ptr = isci_perform_normal_io_completion;
 		break;
 
-	default:
 
-		/* The request is done from an SCU HW perspective. */
-		request->status = completed;
+	/* Note that the only open reject completion codes seen here will be
+	 * abandon-class codes; all others are automatically retried in the SCU.
+	 */
+	case SCU_TASK_OPEN_REJECT_WRONG_DESTINATION:
 
-		spin_unlock(&request->state_lock);
+		isci_request_set_open_reject_status(
+			request, task, response_ptr, status_ptr,
+			complete_to_host_ptr, SAS_OREJ_WRONG_DEST);
+		break;
 
-		/* This is an active request being completed from the core. */
-		switch (completion_status) {
+	case SCU_TASK_OPEN_REJECT_ZONE_VIOLATION:
 
-		case SCI_IO_FAILURE_RESPONSE_VALID:
-			dev_dbg(&isci_host->pdev->dev,
-				"%s: SCI_IO_FAILURE_RESPONSE_VALID (%p/%p)\n",
-				__func__,
-				request,
-				task);
+		/* Note - the return of AB0 will change when
+		 * libsas implements detection of zone violations.
+		 */
+		isci_request_set_open_reject_status(
+			request, task, response_ptr, status_ptr,
+			complete_to_host_ptr, SAS_OREJ_RESV_AB0);
+		break;
 
-			if (sas_protocol_ata(task->task_proto)) {
-				resp_buf = &request->sci.stp.rsp;
-				isci_request_process_stp_response(task,
-								  resp_buf);
-			} else if (SAS_PROTOCOL_SSP == task->task_proto) {
+	case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1:
 
-				/* crack the iu response buffer. */
-				resp_iu = &request->sci.ssp.rsp;
-				isci_request_process_response_iu(task, resp_iu,
-								 &isci_host->pdev->dev);
+		isci_request_set_open_reject_status(
+			request, task, response_ptr, status_ptr,
+			complete_to_host_ptr, SAS_OREJ_RESV_AB1);
+		break;
 
-			} else if (SAS_PROTOCOL_SMP == task->task_proto) {
+	case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2:
 
-				dev_err(&isci_host->pdev->dev,
-					"%s: SCI_IO_FAILURE_RESPONSE_VALID: "
-					"SAS_PROTOCOL_SMP protocol\n",
-					__func__);
+		isci_request_set_open_reject_status(
+			request, task, response_ptr, status_ptr,
+			complete_to_host_ptr, SAS_OREJ_RESV_AB2);
+		break;
 
-			} else
-				dev_err(&isci_host->pdev->dev,
-					"%s: unknown protocol\n", __func__);
+	case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3:
 
-			/* use the task status set in the task struct by the
-			 * isci_request_process_response_iu call.
-			 */
-			request->complete_in_target = true;
-			response = task->task_status.resp;
-			status = task->task_status.stat;
-			break;
+		isci_request_set_open_reject_status(
+			request, task, response_ptr, status_ptr,
+			complete_to_host_ptr, SAS_OREJ_RESV_AB3);
+		break;
 
-		case SCI_IO_SUCCESS:
-		case SCI_IO_SUCCESS_IO_DONE_EARLY:
+	case SCU_TASK_OPEN_REJECT_BAD_DESTINATION:
 
-			response = SAS_TASK_COMPLETE;
-			status   = SAM_STAT_GOOD;
-			request->complete_in_target = true;
+		isci_request_set_open_reject_status(
+			request, task, response_ptr, status_ptr,
+			complete_to_host_ptr, SAS_OREJ_BAD_DEST);
+		break;
 
-			if (task->task_proto == SAS_PROTOCOL_SMP) {
-				void *rsp = &request->sci.smp.rsp;
+	case SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY:
 
-				dev_dbg(&isci_host->pdev->dev,
-					"%s: SMP protocol completion\n",
-					__func__);
+		isci_request_set_open_reject_status(
+			request, task, response_ptr, status_ptr,
+			complete_to_host_ptr, SAS_OREJ_STP_NORES);
+		break;
 
-				sg_copy_from_buffer(
-					&task->smp_task.smp_resp, 1,
-					rsp, sizeof(struct smp_resp));
-			} else if (completion_status
-				   == SCI_IO_SUCCESS_IO_DONE_EARLY) {
+	case SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED:
 
-				/* This was an SSP / STP / SATA transfer.
-				 * There is a possibility that less data than
-				 * the maximum was transferred.
-				 */
-				u32 transferred_length
-					= scic_io_request_get_number_of_bytes_transferred(&request->sci);
+		isci_request_set_open_reject_status(
+			request, task, response_ptr, status_ptr,
+			complete_to_host_ptr, SAS_OREJ_EPROTO);
+		break;
 
-				task->task_status.residual
-					= task->total_xfer_len - transferred_length;
+	case SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED:
 
-				/* If there were residual bytes, call this an
-				 * underrun.
-				 */
-				if (task->task_status.residual != 0)
-					status = SAS_DATA_UNDERRUN;
+		isci_request_set_open_reject_status(
+			request, task, response_ptr, status_ptr,
+			complete_to_host_ptr, SAS_OREJ_CONN_RATE);
+		break;
 
-				dev_dbg(&isci_host->pdev->dev,
-					"%s: SCI_IO_SUCCESS_IO_DONE_EARLY %d\n",
-					__func__,
-					status);
+	case SCU_TASK_DONE_LL_R_ERR:
+	/* Also SCU_TASK_DONE_ACK_NAK_TO: */
+	case SCU_TASK_DONE_LL_PERR:
+	case SCU_TASK_DONE_LL_SY_TERM:
+	/* Also SCU_TASK_DONE_NAK_ERR:*/
+	case SCU_TASK_DONE_LL_LF_TERM:
+	/* Also SCU_TASK_DONE_DATA_LEN_ERR: */
+	case SCU_TASK_DONE_LL_ABORT_ERR:
+	case SCU_TASK_DONE_SEQ_INV_TYPE:
+	/* Also SCU_TASK_DONE_UNEXP_XR: */
+	case SCU_TASK_DONE_XR_IU_LEN_ERR:
+	case SCU_TASK_DONE_INV_FIS_LEN:
+	/* Also SCU_TASK_DONE_XR_WD_LEN: */
+	case SCU_TASK_DONE_SDMA_ERR:
+	case SCU_TASK_DONE_OFFSET_ERR:
+	case SCU_TASK_DONE_MAX_PLD_ERR:
+	case SCU_TASK_DONE_LF_ERR:
+	case SCU_TASK_DONE_SMP_RESP_TO_ERR:  /* Escalate to dev reset? */
+	case SCU_TASK_DONE_SMP_LL_RX_ERR:
+	case SCU_TASK_DONE_UNEXP_DATA:
+	case SCU_TASK_DONE_UNEXP_SDBFIS:
+	case SCU_TASK_DONE_REG_ERR:
+	case SCU_TASK_DONE_SDB_ERR:
+	case SCU_TASK_DONE_TASK_ABORT:
+	default:
+		/* Task in the target is not done. */
+		*response_ptr = SAS_TASK_UNDELIVERED;
+		*status_ptr = SAM_STAT_TASK_ABORTED;
+		request->complete_in_target = false;
 
-			} else
-				dev_dbg(&isci_host->pdev->dev,
-					"%s: SCI_IO_SUCCESS\n",
-					__func__);
+		*complete_to_host_ptr = isci_perform_error_io_completion;
+		break;
+	}
+}
 
-			break;
+/**
+ * isci_task_save_for_upper_layer_completion() - This function saves the
+ *    request for later completion to the upper layer driver.
+ * @host: This parameter is a pointer to the host on which the the request
+ *    should be queued (either as an error or success).
+ * @request: This parameter is the completed request.
+ * @response: This parameter is the response code for the completed task.
+ * @status: This parameter is the status code for the completed task.
+ *
+ * none.
+ */
+static void isci_task_save_for_upper_layer_completion(
+	struct isci_host *host,
+	struct isci_request *request,
+	enum service_response response,
+	enum exec_status status,
+	enum isci_completion_selection task_notification_selection)
+{
+	struct sas_task *task = isci_request_access_task(request);
 
-		case SCI_IO_FAILURE_TERMINATED:
-			dev_dbg(&isci_host->pdev->dev,
-				"%s: SCI_IO_FAILURE_TERMINATED (%p/%p)\n",
-				__func__,
-				request,
-				task);
+	task_notification_selection
+		= isci_task_set_completion_status(task, response, status,
+						  task_notification_selection);
 
-			/* The request was terminated explicitly.  No handling
-			 * is needed in the SCSI error handler path.
-			 */
-			request->complete_in_target = true;
-			response = SAS_TASK_UNDELIVERED;
+	/* Tasks aborted specifically by a call to the lldd_abort_task
+	 * function should not be completed to the host in the regular path.
+	 */
+	switch (task_notification_selection) {
 
-			/* See if the device has been/is being stopped. Note
-			 * that we ignore the quiesce state, since we are
-			 * concerned about the actual device state.
-			 */
-			if ((isci_device->status == isci_stopping) ||
-			    (isci_device->status == isci_stopped))
-				status = SAS_DEVICE_UNKNOWN;
-			else
-				status = SAS_ABORTED_TASK;
+	case isci_perform_normal_io_completion:
 
-			complete_to_host = isci_perform_normal_io_completion;
-			break;
+		/* Normal notification (task_done) */
+		dev_dbg(&host->pdev->dev,
+			"%s: Normal - task = %p, response=%d (%d), status=%d (%d)\n",
+			__func__,
+			task,
+			task->task_status.resp, response,
+			task->task_status.stat, status);
+		/* Add to the completed list. */
+		list_add(&request->completed_node,
+			 &host->requests_to_complete);
 
-		case SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR:
+		/* Take the request off the device's pending request list. */
+		list_del_init(&request->dev_node);
+		break;
 
-			isci_request_handle_controller_specific_errors(
-				isci_device, request, task, &response, &status,
-				&complete_to_host);
+	case isci_perform_aborted_io_completion:
+		/* No notification to libsas because this request is
+		 * already in the abort path.
+		 */
+		dev_warn(&host->pdev->dev,
+			 "%s: Aborted - task = %p, response=%d (%d), status=%d (%d)\n",
+			 __func__,
+			 task,
+			 task->task_status.resp, response,
+			 task->task_status.stat, status);
 
-			break;
+		/* Wake up whatever process was waiting for this
+		 * request to complete.
+		 */
+		WARN_ON(request->io_request_completion == NULL);
 
-		case SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED:
-			/* This is a special case, in that the I/O completion
-			 * is telling us that the device needs a reset.
-			 * In order for the device reset condition to be
-			 * noticed, the I/O has to be handled in the error
-			 * handler.  Set the reset flag and cause the
-			 * SCSI error thread to be scheduled.
-			 */
-			spin_lock_irqsave(&task->task_state_lock, task_flags);
-			task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
+		if (request->io_request_completion != NULL) {
+
+			/* Signal whoever is waiting that this
+			* request is complete.
+			*/
+			complete(request->io_request_completion);
+		}
+		break;
+
+	case isci_perform_error_io_completion:
+		/* Use sas_task_abort */
+		dev_warn(&host->pdev->dev,
+			 "%s: Error - task = %p, response=%d (%d), status=%d (%d)\n",
+			 __func__,
+			 task,
+			 task->task_status.resp, response,
+			 task->task_status.stat, status);
+		/* Add to the aborted list. */
+		list_add(&request->completed_node,
+			 &host->requests_to_errorback);
+		break;
+
+	default:
+		dev_warn(&host->pdev->dev,
+			 "%s: Unknown - task = %p, response=%d (%d), status=%d (%d)\n",
+			 __func__,
+			 task,
+			 task->task_status.resp, response,
+			 task->task_status.stat, status);
+
+		/* Add to the error to libsas list. */
+		list_add(&request->completed_node,
+			 &host->requests_to_errorback);
+		break;
+	}
+}
+
+static void isci_request_io_request_complete(struct isci_host *isci_host,
+					     struct isci_request *request,
+					     enum sci_io_status completion_status)
+{
+	struct sas_task *task = isci_request_access_task(request);
+	struct ssp_response_iu *resp_iu;
+	void *resp_buf;
+	unsigned long task_flags;
+	struct isci_remote_device *isci_device   = request->isci_device;
+	enum service_response response       = SAS_TASK_UNDELIVERED;
+	enum exec_status status         = SAS_ABORTED_TASK;
+	enum isci_request_status request_status;
+	enum isci_completion_selection complete_to_host
+		= isci_perform_normal_io_completion;
+
+	dev_dbg(&isci_host->pdev->dev,
+		"%s: request = %p, task = %p,\n"
+		"task->data_dir = %d completion_status = 0x%x\n",
+		__func__,
+		request,
+		task,
+		task->data_dir,
+		completion_status);
+
+	spin_lock(&request->state_lock);
+	request_status = isci_request_get_state(request);
+
+	/* Decode the request status.  Note that if the request has been
+	 * aborted by a task management function, we don't care
+	 * what the status is.
+	 */
+	switch (request_status) {
+
+	case aborted:
+		/* "aborted" indicates that the request was aborted by a task
+		 * management function, since once a task management request is
+		 * perfomed by the device, the request only completes because
+		 * of the subsequent driver terminate.
+		 *
+		 * Aborted also means an external thread is explicitly managing
+		 * this request, so that we do not complete it up the stack.
+		 *
+		 * The target is still there (since the TMF was successful).
+		 */
+		request->complete_in_target = true;
+		response = SAS_TASK_COMPLETE;
+
+		/* See if the device has been/is being stopped. Note
+		 * that we ignore the quiesce state, since we are
+		 * concerned about the actual device state.
+		 */
+		if ((isci_device->status == isci_stopping)
+		    || (isci_device->status == isci_stopped)
+		    )
+			status = SAS_DEVICE_UNKNOWN;
+		else
+			status = SAS_ABORTED_TASK;
+
+		complete_to_host = isci_perform_aborted_io_completion;
+		/* This was an aborted request. */
+
+		spin_unlock(&request->state_lock);
+		break;
+
+	case aborting:
+		/* aborting means that the task management function tried and
+		 * failed to abort the request. We need to note the request
+		 * as SAS_TASK_UNDELIVERED, so that the scsi mid layer marks the
+		 * target as down.
+		 *
+		 * Aborting also means an external thread is explicitly managing
+		 * this request, so that we do not complete it up the stack.
+		 */
+		request->complete_in_target = true;
+		response = SAS_TASK_UNDELIVERED;
+
+		if ((isci_device->status == isci_stopping) ||
+		    (isci_device->status == isci_stopped))
+			/* The device has been /is being stopped. Note that
+			 * we ignore the quiesce state, since we are
+			 * concerned about the actual device state.
+			 */
+			status = SAS_DEVICE_UNKNOWN;
+		else
+			status = SAS_PHY_DOWN;
+
+		complete_to_host = isci_perform_aborted_io_completion;
+
+		/* This was an aborted request. */
+
+		spin_unlock(&request->state_lock);
+		break;
+
+	case terminating:
+
+		/* This was an terminated request.  This happens when
+		 * the I/O is being terminated because of an action on
+		 * the device (reset, tear down, etc.), and the I/O needs
+		 * to be completed up the stack.
+		 */
+		request->complete_in_target = true;
+		response = SAS_TASK_UNDELIVERED;
+
+		/* See if the device has been/is being stopped. Note
+		 * that we ignore the quiesce state, since we are
+		 * concerned about the actual device state.
+		 */
+		if ((isci_device->status == isci_stopping) ||
+		    (isci_device->status == isci_stopped))
+			status = SAS_DEVICE_UNKNOWN;
+		else
+			status = SAS_ABORTED_TASK;
+
+		complete_to_host = isci_perform_aborted_io_completion;
+
+		/* This was a terminated request. */
+
+		spin_unlock(&request->state_lock);
+		break;
+
+	default:
+
+		/* The request is done from an SCU HW perspective. */
+		request->status = completed;
+
+		spin_unlock(&request->state_lock);
+
+		/* This is an active request being completed from the core. */
+		switch (completion_status) {
+
+		case SCI_IO_FAILURE_RESPONSE_VALID:
+			dev_dbg(&isci_host->pdev->dev,
+				"%s: SCI_IO_FAILURE_RESPONSE_VALID (%p/%p)\n",
+				__func__,
+				request,
+				task);
+
+			if (sas_protocol_ata(task->task_proto)) {
+				resp_buf = &request->sci.stp.rsp;
+				isci_request_process_stp_response(task,
+								  resp_buf);
+			} else if (SAS_PROTOCOL_SSP == task->task_proto) {
+
+				/* crack the iu response buffer. */
+				resp_iu = &request->sci.ssp.rsp;
+				isci_request_process_response_iu(task, resp_iu,
+								 &isci_host->pdev->dev);
+
+			} else if (SAS_PROTOCOL_SMP == task->task_proto) {
+
+				dev_err(&isci_host->pdev->dev,
+					"%s: SCI_IO_FAILURE_RESPONSE_VALID: "
+					"SAS_PROTOCOL_SMP protocol\n",
+					__func__);
+
+			} else
+				dev_err(&isci_host->pdev->dev,
+					"%s: unknown protocol\n", __func__);
+
+			/* use the task status set in the task struct by the
+			 * isci_request_process_response_iu call.
+			 */
+			request->complete_in_target = true;
+			response = task->task_status.resp;
+			status = task->task_status.stat;
+			break;
+
+		case SCI_IO_SUCCESS:
+		case SCI_IO_SUCCESS_IO_DONE_EARLY:
+
+			response = SAS_TASK_COMPLETE;
+			status   = SAM_STAT_GOOD;
+			request->complete_in_target = true;
+
+			if (task->task_proto == SAS_PROTOCOL_SMP) {
+				void *rsp = &request->sci.smp.rsp;
+
+				dev_dbg(&isci_host->pdev->dev,
+					"%s: SMP protocol completion\n",
+					__func__);
+
+				sg_copy_from_buffer(
+					&task->smp_task.smp_resp, 1,
+					rsp, sizeof(struct smp_resp));
+			} else if (completion_status
+				   == SCI_IO_SUCCESS_IO_DONE_EARLY) {
+
+				/* This was an SSP / STP / SATA transfer.
+				 * There is a possibility that less data than
+				 * the maximum was transferred.
+				 */
+				u32 transferred_length = sci_req_tx_bytes(&request->sci);
+
+				task->task_status.residual
+					= task->total_xfer_len - transferred_length;
+
+				/* If there were residual bytes, call this an
+				 * underrun.
+				 */
+				if (task->task_status.residual != 0)
+					status = SAS_DATA_UNDERRUN;
+
+				dev_dbg(&isci_host->pdev->dev,
+					"%s: SCI_IO_SUCCESS_IO_DONE_EARLY %d\n",
+					__func__,
+					status);
+
+			} else
+				dev_dbg(&isci_host->pdev->dev,
+					"%s: SCI_IO_SUCCESS\n",
+					__func__);
+
+			break;
+
+		case SCI_IO_FAILURE_TERMINATED:
+			dev_dbg(&isci_host->pdev->dev,
+				"%s: SCI_IO_FAILURE_TERMINATED (%p/%p)\n",
+				__func__,
+				request,
+				task);
+
+			/* The request was terminated explicitly.  No handling
+			 * is needed in the SCSI error handler path.
+			 */
+			request->complete_in_target = true;
+			response = SAS_TASK_UNDELIVERED;
+
+			/* See if the device has been/is being stopped. Note
+			 * that we ignore the quiesce state, since we are
+			 * concerned about the actual device state.
+			 */
+			if ((isci_device->status == isci_stopping) ||
+			    (isci_device->status == isci_stopped))
+				status = SAS_DEVICE_UNKNOWN;
+			else
+				status = SAS_ABORTED_TASK;
+
+			complete_to_host = isci_perform_normal_io_completion;
+			break;
+
+		case SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR:
+
+			isci_request_handle_controller_specific_errors(
+				isci_device, request, task, &response, &status,
+				&complete_to_host);
+
+			break;
+
+		case SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED:
+			/* This is a special case, in that the I/O completion
+			 * is telling us that the device needs a reset.
+			 * In order for the device reset condition to be
+			 * noticed, the I/O has to be handled in the error
+			 * handler.  Set the reset flag and cause the
+			 * SCSI error thread to be scheduled.
+			 */
+			spin_lock_irqsave(&task->task_state_lock, task_flags);
+			task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
 			spin_unlock_irqrestore(&task->task_state_lock, task_flags);
 
-			/* Fail the I/O. */
-			response = SAS_TASK_UNDELIVERED;
-			status = SAM_STAT_TASK_ABORTED;
+			/* Fail the I/O. */
+			response = SAS_TASK_UNDELIVERED;
+			status = SAM_STAT_TASK_ABORTED;
+
+			complete_to_host = isci_perform_error_io_completion;
+			request->complete_in_target = false;
+			break;
+
+		default:
+			/* Catch any otherwise unhandled error codes here. */
+			dev_warn(&isci_host->pdev->dev,
+				 "%s: invalid completion code: 0x%x - "
+				 "isci_request = %p\n",
+				 __func__, completion_status, request);
+
+			response = SAS_TASK_UNDELIVERED;
+
+			/* See if the device has been/is being stopped. Note
+			 * that we ignore the quiesce state, since we are
+			 * concerned about the actual device state.
+			 */
+			if ((isci_device->status == isci_stopping) ||
+			    (isci_device->status == isci_stopped))
+				status = SAS_DEVICE_UNKNOWN;
+			else
+				status = SAS_ABORTED_TASK;
+
+			complete_to_host = isci_perform_error_io_completion;
+			request->complete_in_target = false;
+			break;
+		}
+		break;
+	}
+
+	isci_request_unmap_sgl(request, isci_host->pdev);
+
+	/* Put the completed request on the correct list */
+	isci_task_save_for_upper_layer_completion(isci_host, request, response,
+						  status, complete_to_host
+						  );
+
+	/* complete the io request to the core. */
+	scic_controller_complete_io(&isci_host->sci,
+				    &isci_device->sci,
+				    &request->sci);
+	/* set terminated handle so it cannot be completed or
+	 * terminated again, and to cause any calls into abort
+	 * task to recognize the already completed case.
+	 */
+	request->terminated = true;
+
+	isci_host_can_dequeue(isci_host, 1);
+}
+
+/**
+ * scic_sds_request_initial_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ *    transition is occurring.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_INITIAL state. This state is entered when the initial
+ * base request is constructed. Entry into the initial state sets all handlers
+ * for the io request object to their default handlers. none
+ */
+static void scic_sds_request_initial_state_enter(void *object)
+{
+	struct scic_sds_request *sci_req = object;
+
+	SET_STATE_HANDLER(
+		sci_req,
+		scic_sds_request_state_handler_table,
+		SCI_BASE_REQUEST_STATE_INITIAL
+		);
+}
+
+/**
+ * scic_sds_request_constructed_state_enter() -
+ * @object: The io request object that is to enter the constructed state.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_CONSTRUCTED state. The method sets the state handlers
+ * for the the constructed state. none
+ */
+static void scic_sds_request_constructed_state_enter(void *object)
+{
+	struct scic_sds_request *sci_req = object;
+
+	SET_STATE_HANDLER(
+		sci_req,
+		scic_sds_request_state_handler_table,
+		SCI_BASE_REQUEST_STATE_CONSTRUCTED
+		);
+}
+
+/**
+ * scic_sds_request_started_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ *    transition is occurring.  This is cast into a SCIC_SDS_IO_REQUEST object.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_STARTED state. If the io request object type is a
+ * SCSI Task request we must enter the started substate machine. none
+ */
+static void scic_sds_request_started_state_enter(void *object)
+{
+	struct scic_sds_request *sci_req = object;
+
+	SET_STATE_HANDLER(
+		sci_req,
+		scic_sds_request_state_handler_table,
+		SCI_BASE_REQUEST_STATE_STARTED
+		);
+
+	/*
+	 * Most of the request state machines have a started substate machine so
+	 * start its execution on the entry to the started state. */
+	if (sci_req->has_started_substate_machine == true)
+		sci_base_state_machine_start(&sci_req->started_substate_machine);
+}
+
+/**
+ * scic_sds_request_started_state_exit() -
+ * @object: This parameter specifies the base object for which the state
+ *    transition is occurring.  This object is cast into a SCIC_SDS_IO_REQUEST
+ *    object.
+ *
+ * This method implements the actions taken when exiting the
+ * SCI_BASE_REQUEST_STATE_STARTED state. For task requests the action will be
+ * to stop the started substate machine. none
+ */
+static void scic_sds_request_started_state_exit(void *object)
+{
+	struct scic_sds_request *sci_req = object;
+
+	if (sci_req->has_started_substate_machine == true)
+		sci_base_state_machine_stop(&sci_req->started_substate_machine);
+}
+
+/**
+ * scic_sds_request_completed_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ *    transition is occurring.  This object is cast into a SCIC_SDS_IO_REQUEST
+ *    object.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_COMPLETED state.  This state is entered when the
+ * SCIC_SDS_IO_REQUEST has completed.  The method will decode the request
+ * completion status and convert it to an enum sci_status to return in the
+ * completion callback function. none
+ */
+static void scic_sds_request_completed_state_enter(void *object)
+{
+	struct scic_sds_request *sci_req = object;
+	struct scic_sds_controller *scic =
+		scic_sds_request_get_controller(sci_req);
+	struct isci_host *ihost = scic_to_ihost(scic);
+	struct isci_request *ireq = sci_req_to_ireq(sci_req);
+
+	SET_STATE_HANDLER(sci_req,
+			  scic_sds_request_state_handler_table,
+			  SCI_BASE_REQUEST_STATE_COMPLETED);
+
+	/* Tell the SCI_USER that the IO request is complete */
+	if (sci_req->is_task_management_request == false)
+		isci_request_io_request_complete(ihost, ireq,
+						 sci_req->sci_status);
+	else
+		isci_task_request_complete(ihost, ireq, sci_req->sci_status);
+}
+
+/**
+ * scic_sds_request_aborting_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ *    transition is occurring.  This object is cast into a SCIC_SDS_IO_REQUEST
+ *    object.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_ABORTING state. none
+ */
+static void scic_sds_request_aborting_state_enter(void *object)
+{
+	struct scic_sds_request *sci_req = object;
+
+	/* Setting the abort bit in the Task Context is required by the silicon. */
+	sci_req->task_context_buffer->abort = 1;
+
+	SET_STATE_HANDLER(
+		sci_req,
+		scic_sds_request_state_handler_table,
+		SCI_BASE_REQUEST_STATE_ABORTING
+		);
+}
+
+/**
+ * scic_sds_request_final_state_enter() -
+ * @object: This parameter specifies the base object for which the state
+ *    transition is occurring.  This is cast into a SCIC_SDS_IO_REQUEST object.
+ *
+ * This method implements the actions taken when entering the
+ * SCI_BASE_REQUEST_STATE_FINAL state. The only action required is to put the
+ * state handlers in place. none
+ */
+static void scic_sds_request_final_state_enter(void *object)
+{
+	struct scic_sds_request *sci_req = object;
+
+	SET_STATE_HANDLER(
+		sci_req,
+		scic_sds_request_state_handler_table,
+		SCI_BASE_REQUEST_STATE_FINAL
+		);
+}
+
+static const struct sci_base_state scic_sds_request_state_table[] = {
+	[SCI_BASE_REQUEST_STATE_INITIAL] = {
+		.enter_state = scic_sds_request_initial_state_enter,
+	},
+	[SCI_BASE_REQUEST_STATE_CONSTRUCTED] = {
+		.enter_state = scic_sds_request_constructed_state_enter,
+	},
+	[SCI_BASE_REQUEST_STATE_STARTED] = {
+		.enter_state = scic_sds_request_started_state_enter,
+		.exit_state  = scic_sds_request_started_state_exit
+	},
+	[SCI_BASE_REQUEST_STATE_COMPLETED] = {
+		.enter_state = scic_sds_request_completed_state_enter,
+	},
+	[SCI_BASE_REQUEST_STATE_ABORTING] = {
+		.enter_state = scic_sds_request_aborting_state_enter,
+	},
+	[SCI_BASE_REQUEST_STATE_FINAL] = {
+		.enter_state = scic_sds_request_final_state_enter,
+	},
+};
+
+static void scic_sds_general_request_construct(struct scic_sds_controller *scic,
+					       struct scic_sds_remote_device *sci_dev,
+					       u16 io_tag, struct scic_sds_request *sci_req)
+{
+	sci_base_state_machine_construct(&sci_req->state_machine, sci_req,
+			scic_sds_request_state_table, SCI_BASE_REQUEST_STATE_INITIAL);
+	sci_base_state_machine_start(&sci_req->state_machine);
+
+	sci_req->io_tag = io_tag;
+	sci_req->owning_controller = scic;
+	sci_req->target_device = sci_dev;
+	sci_req->has_started_substate_machine = false;
+	sci_req->protocol = SCIC_NO_PROTOCOL;
+	sci_req->saved_rx_frame_index = SCU_INVALID_FRAME_INDEX;
+	sci_req->device_sequence = scic_sds_remote_device_get_sequence(sci_dev);
+
+	sci_req->sci_status   = SCI_SUCCESS;
+	sci_req->scu_status   = 0;
+	sci_req->post_context = 0xFFFFFFFF;
+
+	sci_req->is_task_management_request = false;
+
+	if (io_tag == SCI_CONTROLLER_INVALID_IO_TAG) {
+		sci_req->was_tag_assigned_by_user = false;
+		sci_req->task_context_buffer = NULL;
+	} else {
+		sci_req->was_tag_assigned_by_user = true;
+
+		sci_req->task_context_buffer =
+			scic_sds_controller_get_task_context_buffer(scic, io_tag);
+	}
+}
+
+static enum sci_status
+scic_io_request_construct(struct scic_sds_controller *scic,
+			  struct scic_sds_remote_device *sci_dev,
+			  u16 io_tag, struct scic_sds_request *sci_req)
+{
+	struct domain_device *dev = sci_dev_to_domain(sci_dev);
+	enum sci_status status = SCI_SUCCESS;
+
+	/* Build the common part of the request */
+	scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req);
+
+	if (sci_dev->rnc.remote_node_index ==
+			SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
+		return SCI_FAILURE_INVALID_REMOTE_DEVICE;
+
+	if (dev->dev_type == SAS_END_DEV)
+		scic_sds_ssp_io_request_assign_buffers(sci_req);
+	else if ((dev->dev_type == SATA_DEV) ||
+		 (dev->tproto & SAS_PROTOCOL_STP)) {
+		scic_sds_stp_request_assign_buffers(sci_req);
+		memset(&sci_req->stp.cmd, 0, sizeof(sci_req->stp.cmd));
+	} else if (dev_is_expander(dev)) {
+		scic_sds_smp_request_assign_buffers(sci_req);
+		memset(&sci_req->smp.cmd, 0, sizeof(sci_req->smp.cmd));
+	} else
+		status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
+
+	if (status == SCI_SUCCESS) {
+		memset(sci_req->task_context_buffer, 0,
+		       offsetof(struct scu_task_context, sgl_pair_ab));
+	}
+
+	return status;
+}
+
+enum sci_status scic_task_request_construct(struct scic_sds_controller *scic,
+					    struct scic_sds_remote_device *sci_dev,
+					    u16 io_tag, struct scic_sds_request *sci_req)
+{
+	struct domain_device *dev = sci_dev_to_domain(sci_dev);
+	enum sci_status status = SCI_SUCCESS;
+
+	/* Build the common part of the request */
+	scic_sds_general_request_construct(scic, sci_dev, io_tag, sci_req);
+
+	if (dev->dev_type == SAS_END_DEV) {
+		scic_sds_ssp_task_request_assign_buffers(sci_req);
+
+		sci_req->has_started_substate_machine = true;
+
+		/* Construct the started sub-state machine. */
+		sci_base_state_machine_construct(
+			&sci_req->started_substate_machine,
+			sci_req,
+			scic_sds_io_request_started_task_mgmt_substate_table,
+			SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION
+			);
+	} else if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP))
+		scic_sds_stp_request_assign_buffers(sci_req);
+	else
+		status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
+
+	if (status == SCI_SUCCESS) {
+		sci_req->is_task_management_request = true;
+		memset(sci_req->task_context_buffer, 0, sizeof(struct scu_task_context));
+	}
+
+	return status;
+}
+
+static enum sci_status isci_request_ssp_request_construct(
+	struct isci_request *request)
+{
+	enum sci_status status;
+
+	dev_dbg(&request->isci_host->pdev->dev,
+		"%s: request = %p\n",
+		__func__,
+		request);
+	status = scic_io_request_construct_basic_ssp(&request->sci);
+	return status;
+}
+
+static enum sci_status isci_request_stp_request_construct(
+	struct isci_request *request)
+{
+	struct sas_task *task = isci_request_access_task(request);
+	enum sci_status status;
+	struct host_to_dev_fis *register_fis;
+
+	dev_dbg(&request->isci_host->pdev->dev,
+		"%s: request = %p\n",
+		__func__,
+		request);
+
+	/* Get the host_to_dev_fis from the core and copy
+	 * the fis from the task into it.
+	 */
+	register_fis = isci_sata_task_to_fis_copy(task);
+
+	status = scic_io_request_construct_basic_sata(&request->sci);
+
+	/* Set the ncq tag in the fis, from the queue
+	 * command in the task.
+	 */
+	if (isci_sata_is_task_ncq(task)) {
+
+		isci_sata_set_ncq_tag(
+			register_fis,
+			task
+			);
+	}
+
+	return status;
+}
+
+/*
+ * isci_smp_request_build() - This function builds the smp request.
+ * @ireq: This parameter points to the isci_request allocated in the
+ *    request construct function.
+ *
+ * SCI_SUCCESS on successfull completion, or specific failure code.
+ */
+static enum sci_status isci_smp_request_build(struct isci_request *ireq)
+{
+	enum sci_status status = SCI_FAILURE;
+	struct sas_task *task = isci_request_access_task(ireq);
+	struct scic_sds_request *sci_req = &ireq->sci;
+
+	dev_dbg(&ireq->isci_host->pdev->dev,
+		"%s: request = %p\n", __func__, ireq);
+
+	dev_dbg(&ireq->isci_host->pdev->dev,
+		"%s: smp_req len = %d\n",
+		__func__,
+		task->smp_task.smp_req.length);
+
+	/* copy the smp_command to the address; */
+	sg_copy_to_buffer(&task->smp_task.smp_req, 1,
+			  &sci_req->smp.cmd,
+			  sizeof(struct smp_req));
+
+	status = scic_io_request_construct_smp(sci_req);
+	if (status != SCI_SUCCESS)
+		dev_warn(&ireq->isci_host->pdev->dev,
+			 "%s: failed with status = %d\n",
+			 __func__,
+			 status);
+
+	return status;
+}
+
+/**
+ * isci_io_request_build() - This function builds the io request object.
+ * @isci_host: This parameter specifies the ISCI host object
+ * @request: This parameter points to the isci_request object allocated in the
+ *    request construct function.
+ * @sci_device: This parameter is the handle for the sci core's remote device
+ *    object that is the destination for this request.
+ *
+ * SCI_SUCCESS on successfull completion, or specific failure code.
+ */
+static enum sci_status isci_io_request_build(
+	struct isci_host *isci_host,
+	struct isci_request *request,
+	struct isci_remote_device *isci_device)
+{
+	enum sci_status status = SCI_SUCCESS;
+	struct sas_task *task = isci_request_access_task(request);
+	struct scic_sds_remote_device *sci_device = &isci_device->sci;
+
+	dev_dbg(&isci_host->pdev->dev,
+		"%s: isci_device = 0x%p; request = %p, "
+		"num_scatter = %d\n",
+		__func__,
+		isci_device,
+		request,
+		task->num_scatter);
+
+	/* map the sgl addresses, if present.
+	 * libata does the mapping for sata devices
+	 * before we get the request.
+	 */
+	if (task->num_scatter &&
+	    !sas_protocol_ata(task->task_proto) &&
+	    !(SAS_PROTOCOL_SMP & task->task_proto)) {
+
+		request->num_sg_entries = dma_map_sg(
+			&isci_host->pdev->dev,
+			task->scatter,
+			task->num_scatter,
+			task->data_dir
+			);
+
+		if (request->num_sg_entries == 0)
+			return SCI_FAILURE_INSUFFICIENT_RESOURCES;
+	}
+
+	/* build the common request object. For now,
+	 * we will let the core allocate the IO tag.
+	 */
+	status = scic_io_request_construct(&isci_host->sci, sci_device,
+					   SCI_CONTROLLER_INVALID_IO_TAG,
+					   &request->sci);
+
+	if (status != SCI_SUCCESS) {
+		dev_warn(&isci_host->pdev->dev,
+			 "%s: failed request construct\n",
+			 __func__);
+		return SCI_FAILURE;
+	}
+
+	switch (task->task_proto) {
+	case SAS_PROTOCOL_SMP:
+		status = isci_smp_request_build(request);
+		break;
+	case SAS_PROTOCOL_SSP:
+		status = isci_request_ssp_request_construct(request);
+		break;
+	case SAS_PROTOCOL_SATA:
+	case SAS_PROTOCOL_STP:
+	case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
+		status = isci_request_stp_request_construct(request);
+		break;
+	default:
+		dev_warn(&isci_host->pdev->dev,
+			 "%s: unknown protocol\n", __func__);
+		return SCI_FAILURE;
+	}
+
+	return SCI_SUCCESS;
+}
+
+/**
+ * isci_request_alloc_core() - This function gets the request object from the
+ *    isci_host dma cache.
+ * @isci_host: This parameter specifies the ISCI host object
+ * @isci_request: This parameter will contain the pointer to the new
+ *    isci_request object.
+ * @isci_device: This parameter is the pointer to the isci remote device object
+ *    that is the destination for this request.
+ * @gfp_flags: This parameter specifies the os allocation flags.
+ *
+ * SCI_SUCCESS on successfull completion, or specific failure code.
+ */
+static int isci_request_alloc_core(
+	struct isci_host *isci_host,
+	struct isci_request **isci_request,
+	struct isci_remote_device *isci_device,
+	gfp_t gfp_flags)
+{
+	int ret = 0;
+	dma_addr_t handle;
+	struct isci_request *request;
+
 
-			complete_to_host = isci_perform_error_io_completion;
-			request->complete_in_target = false;
-			break;
+	/* get pointer to dma memory. This actually points
+	 * to both the isci_remote_device object and the
+	 * sci object. The isci object is at the beginning
+	 * of the memory allocated here.
+	 */
+	request = dma_pool_alloc(isci_host->dma_pool, gfp_flags, &handle);
+	if (!request) {
+		dev_warn(&isci_host->pdev->dev,
+			 "%s: dma_pool_alloc returned NULL\n", __func__);
+		return -ENOMEM;
+	}
 
-		default:
-			/* Catch any otherwise unhandled error codes here. */
-			dev_warn(&isci_host->pdev->dev,
-				 "%s: invalid completion code: 0x%x - "
-				 "isci_request = %p\n",
-				 __func__, completion_status, request);
+	/* initialize the request object.	*/
+	spin_lock_init(&request->state_lock);
+	request->request_daddr = handle;
+	request->isci_host = isci_host;
+	request->isci_device = isci_device;
+	request->io_request_completion = NULL;
+	request->terminated = false;
 
-			response = SAS_TASK_UNDELIVERED;
+	request->num_sg_entries = 0;
 
-			/* See if the device has been/is being stopped. Note
-			 * that we ignore the quiesce state, since we are
-			 * concerned about the actual device state.
-			 */
-			if ((isci_device->status == isci_stopping) ||
-			    (isci_device->status == isci_stopped))
-				status = SAS_DEVICE_UNKNOWN;
-			else
-				status = SAS_ABORTED_TASK;
+	request->complete_in_target = false;
 
-			complete_to_host = isci_perform_error_io_completion;
-			request->complete_in_target = false;
-			break;
-		}
-		break;
+	INIT_LIST_HEAD(&request->completed_node);
+	INIT_LIST_HEAD(&request->dev_node);
+
+	*isci_request = request;
+	isci_request_change_state(request, allocated);
+
+	return ret;
+}
+
+static int isci_request_alloc_io(
+	struct isci_host *isci_host,
+	struct sas_task *task,
+	struct isci_request **isci_request,
+	struct isci_remote_device *isci_device,
+	gfp_t gfp_flags)
+{
+	int retval = isci_request_alloc_core(isci_host, isci_request,
+					     isci_device, gfp_flags);
+
+	if (!retval) {
+		(*isci_request)->ttype_ptr.io_task_ptr = task;
+		(*isci_request)->ttype                 = io_task;
+
+		task->lldd_task = *isci_request;
 	}
+	return retval;
+}
 
-	isci_request_unmap_sgl(request, isci_host->pdev);
+/**
+ * isci_request_alloc_tmf() - This function gets the request object from the
+ *    isci_host dma cache and initializes the relevant fields as a sas_task.
+ * @isci_host: This parameter specifies the ISCI host object
+ * @sas_task: This parameter is the task struct from the upper layer driver.
+ * @isci_request: This parameter will contain the pointer to the new
+ *    isci_request object.
+ * @isci_device: This parameter is the pointer to the isci remote device object
+ *    that is the destination for this request.
+ * @gfp_flags: This parameter specifies the os allocation flags.
+ *
+ * SCI_SUCCESS on successfull completion, or specific failure code.
+ */
+int isci_request_alloc_tmf(
+	struct isci_host *isci_host,
+	struct isci_tmf *isci_tmf,
+	struct isci_request **isci_request,
+	struct isci_remote_device *isci_device,
+	gfp_t gfp_flags)
+{
+	int retval = isci_request_alloc_core(isci_host, isci_request,
+					     isci_device, gfp_flags);
 
-	/* Put the completed request on the correct list */
-	isci_task_save_for_upper_layer_completion(isci_host, request, response,
-						  status, complete_to_host
-						  );
+	if (!retval) {
 
-	/* complete the io request to the core. */
-	scic_controller_complete_io(&isci_host->sci,
-				    &isci_device->sci,
-				    &request->sci);
-	/* set terminated handle so it cannot be completed or
-	 * terminated again, and to cause any calls into abort
-	 * task to recognize the already completed case.
+		(*isci_request)->ttype_ptr.tmf_task_ptr = isci_tmf;
+		(*isci_request)->ttype = tmf_task;
+	}
+	return retval;
+}
+
+/**
+ * isci_request_execute() - This function allocates the isci_request object,
+ *    all fills in some common fields.
+ * @isci_host: This parameter specifies the ISCI host object
+ * @sas_task: This parameter is the task struct from the upper layer driver.
+ * @isci_request: This parameter will contain the pointer to the new
+ *    isci_request object.
+ * @gfp_flags: This parameter specifies the os allocation flags.
+ *
+ * SCI_SUCCESS on successfull completion, or specific failure code.
+ */
+int isci_request_execute(
+	struct isci_host *isci_host,
+	struct sas_task *task,
+	struct isci_request **isci_request,
+	gfp_t gfp_flags)
+{
+	int ret = 0;
+	struct scic_sds_remote_device *sci_device;
+	enum sci_status status = SCI_FAILURE_UNSUPPORTED_PROTOCOL;
+	struct isci_remote_device *isci_device;
+	struct isci_request *request;
+	unsigned long flags;
+
+	isci_device = task->dev->lldd_dev;
+	sci_device = &isci_device->sci;
+
+	/* do common allocation and init of request object. */
+	ret = isci_request_alloc_io(
+		isci_host,
+		task,
+		&request,
+		isci_device,
+		gfp_flags
+		);
+
+	if (ret)
+		goto out;
+
+	status = isci_io_request_build(isci_host, request, isci_device);
+	if (status != SCI_SUCCESS) {
+		dev_warn(&isci_host->pdev->dev,
+			 "%s: request_construct failed - status = 0x%x\n",
+			 __func__,
+			 status);
+		goto out;
+	}
+
+	spin_lock_irqsave(&isci_host->scic_lock, flags);
+
+	/* send the request, let the core assign the IO TAG.	*/
+	status = scic_controller_start_io(&isci_host->sci, sci_device,
+					  &request->sci,
+					  SCI_CONTROLLER_INVALID_IO_TAG);
+	if (status != SCI_SUCCESS &&
+	    status != SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
+		dev_warn(&isci_host->pdev->dev,
+			 "%s: failed request start (0x%x)\n",
+			 __func__, status);
+		spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+		goto out;
+	}
+
+	/* Either I/O started OK, or the core has signaled that
+	 * the device needs a target reset.
+	 *
+	 * In either case, hold onto the I/O for later.
+	 *
+	 * Update it's status and add it to the list in the
+	 * remote device object.
 	 */
-	request->terminated = true;
+	isci_request_change_state(request, started);
+	list_add(&request->dev_node, &isci_device->reqs_in_process);
 
-	isci_host_can_dequeue(isci_host, 1);
+	if (status == SCI_SUCCESS) {
+		/* Save the tag for possible task mgmt later. */
+		request->io_tag = request->sci.io_tag;
+	} else {
+		/* The request did not really start in the
+		 * hardware, so clear the request handle
+		 * here so no terminations will be done.
+		 */
+		request->terminated = true;
+	}
+	spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+
+	if (status ==
+	    SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
+		/* Signal libsas that we need the SCSI error
+		* handler thread to work on this I/O and that
+		* we want a device reset.
+		*/
+		spin_lock_irqsave(&task->task_state_lock, flags);
+		task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
+		spin_unlock_irqrestore(&task->task_state_lock, flags);
+
+		/* Cause this task to be scheduled in the SCSI error
+		* handler thread.
+		*/
+		isci_execpath_callback(isci_host, task,
+				       sas_task_abort);
+
+		/* Change the status, since we are holding
+		* the I/O until it is managed by the SCSI
+		* error handler.
+		*/
+		status = SCI_SUCCESS;
+	}
+
+ out:
+	if (status != SCI_SUCCESS) {
+		/* release dma memory on failure. */
+		isci_request_free(isci_host, request);
+		request = NULL;
+		ret = SCI_FAILURE;
+	}
+
+	*isci_request = request;
+	return ret;
 }
+
+
+

drivers/scsi/isci/request.h

@@ -58,7 +58,8 @@
 
 #include "isci.h"
 #include "host.h"
-#include "scic_sds_request.h"
+#include "scu_task_context.h"
+#include "stp_request.h"
 
 /**
  * struct isci_request_status - This enum defines the possible states of an I/O
@@ -82,6 +83,151 @@ enum task_type {
 	tmf_task = 1
 };
 
+enum sci_request_protocol {
+	SCIC_NO_PROTOCOL,
+	SCIC_SMP_PROTOCOL,
+	SCIC_SSP_PROTOCOL,
+	SCIC_STP_PROTOCOL
+}; /* XXX remove me, use sas_task.dev instead */;
+
+struct scic_sds_request {
+	/**
+	 * This field contains the information for the base request state machine.
+	 */
+	struct sci_base_state_machine state_machine;
+
+	/**
+	 * This field simply points to the controller to which this IO request
+	 * is associated.
+	 */
+	struct scic_sds_controller *owning_controller;
+
+	/**
+	 * This field simply points to the remote device to which this IO request
+	 * is associated.
+	 */
+	struct scic_sds_remote_device *target_device;
+
+	/**
+	 * This field is utilized to determine if the SCI user is managing
+	 * the IO tag for this request or if the core is managing it.
+	 */
+	bool was_tag_assigned_by_user;
+
+	/**
+	 * This field indicates the IO tag for this request.  The IO tag is
+	 * comprised of the task_index and a sequence count. The sequence count
+	 * is utilized to help identify tasks from one life to another.
+	 */
+	u16 io_tag;
+
+	/**
+	 * This field specifies the protocol being utilized for this
+	 * IO request.
+	 */
+	enum sci_request_protocol protocol;
+
+	/**
+	 * This field indicates the completion status taken from the SCUs
+	 * completion code.  It indicates the completion result for the SCU hardware.
+	 */
+	u32 scu_status;
+
+	/**
+	 * This field indicates the completion status returned to the SCI user.  It
+	 * indicates the users view of the io request completion.
+	 */
+	u32 sci_status;
+
+	/**
+	 * This field contains the value to be utilized when posting (e.g. Post_TC,
+	 * Post_TC_Abort) this request to the silicon.
+	 */
+	u32 post_context;
+
+	struct scu_task_context *task_context_buffer;
+	struct scu_task_context tc ____cacheline_aligned;
+
+	/* could be larger with sg chaining */
+	#define SCU_SGL_SIZE ((SCU_IO_REQUEST_SGE_COUNT + 1) / 2)
+	struct scu_sgl_element_pair sg_table[SCU_SGL_SIZE] __attribute__ ((aligned(32)));
+
+	/**
+	 * This field indicates if this request is a task management request or
+	 * normal IO request.
+	 */
+	bool is_task_management_request;
+
+	/**
+	 * This field indicates that this request contains an initialized started
+	 * substate machine.
+	 */
+	bool has_started_substate_machine;
+
+	/**
+	 * This field is a pointer to the stored rx frame data.  It is used in STP
+	 * internal requests and SMP response frames.  If this field is non-NULL the
+	 * saved frame must be released on IO request completion.
+	 *
+	 * @todo In the future do we want to keep a list of RX frame buffers?
+	 */
+	u32 saved_rx_frame_index;
+
+	/**
+	 * This field specifies the data necessary to manage the sub-state
+	 * machine executed while in the SCI_BASE_REQUEST_STATE_STARTED state.
+	 */
+	struct sci_base_state_machine started_substate_machine;
+
+	/**
+	 * This field specifies the current state handlers in place for this
+	 * IO Request object.  This field is updated each time the request
+	 * changes state.
+	 */
+	const struct scic_sds_io_request_state_handler *state_handlers;
+
+	/**
+	 * This field in the recorded device sequence for the io request.  This is
+	 * recorded during the build operation and is compared in the start
+	 * operation.  If the sequence is different then there was a change of
+	 * devices from the build to start operations.
+	 */
+	u8 device_sequence;
+
+	union {
+		struct {
+			union {
+				struct ssp_cmd_iu cmd;
+				struct ssp_task_iu tmf;
+			};
+			union {
+				struct ssp_response_iu rsp;
+				u8 rsp_buf[SSP_RESP_IU_MAX_SIZE];
+			};
+		} ssp;
+
+		struct {
+			struct smp_req cmd;
+			struct smp_resp rsp;
+		} smp;
+
+		struct {
+			struct scic_sds_stp_request req;
+			struct host_to_dev_fis cmd;
+			struct dev_to_host_fis rsp;
+		} stp;
+	};
+
+};
+
+static inline struct scic_sds_request *to_sci_req(struct scic_sds_stp_request *stp_req)
+{
+	struct scic_sds_request *sci_req;
+
+	sci_req = container_of(stp_req, typeof(*sci_req), stp.req);
+	return sci_req;
+}
+
 struct isci_request {
 	enum isci_request_status status;
 	enum task_type ttype;
@@ -125,6 +271,273 @@ static inline struct isci_request *sci_req_to_ireq(struct scic_sds_request *sci_
 	return ireq;
 }
 
+/**
+ * enum sci_base_request_states - This enumeration depicts all the states for
+ *    the common request state machine.
+ *
+ *
+ */
+enum sci_base_request_states {
+	/**
+	 * Simply the initial state for the base request state machine.
+	 */
+	SCI_BASE_REQUEST_STATE_INITIAL,
+
+	/**
+	 * This state indicates that the request has been constructed. This state
+	 * is entered from the INITIAL state.
+	 */
+	SCI_BASE_REQUEST_STATE_CONSTRUCTED,
+
+	/**
+	 * This state indicates that the request has been started. This state is
+	 * entered from the CONSTRUCTED state.
+	 */
+	SCI_BASE_REQUEST_STATE_STARTED,
+
+	/**
+	 * This state indicates that the request has completed.
+	 * This state is entered from the STARTED state. This state is entered from
+	 * the ABORTING state.
+	 */
+	SCI_BASE_REQUEST_STATE_COMPLETED,
+
+	/**
+	 * This state indicates that the request is in the process of being
+	 * terminated/aborted.
+	 * This state is entered from the CONSTRUCTED state.
+	 * This state is entered from the STARTED state.
+	 */
+	SCI_BASE_REQUEST_STATE_ABORTING,
+
+	/**
+	 * Simply the final state for the base request state machine.
+	 */
+	SCI_BASE_REQUEST_STATE_FINAL,
+};
+
+typedef enum sci_status (*scic_sds_io_request_handler_t)
+				(struct scic_sds_request *request);
+typedef enum sci_status (*scic_sds_io_request_frame_handler_t)
+				(struct scic_sds_request *req, u32 frame);
+typedef enum sci_status (*scic_sds_io_request_event_handler_t)
+				(struct scic_sds_request *req, u32 event);
+typedef enum sci_status (*scic_sds_io_request_task_completion_handler_t)
+				(struct scic_sds_request *req, u32 completion_code);
+
+/**
+ * struct scic_sds_io_request_state_handler - This is the SDS core definition
+ *    of the state handlers.
+ *
+ *
+ */
+struct scic_sds_io_request_state_handler {
+	/**
+	 * The start_handler specifies the method invoked when a user attempts to
+	 * start a request.
+	 */
+	scic_sds_io_request_handler_t start_handler;
+
+	/**
+	 * The abort_handler specifies the method invoked when a user attempts to
+	 * abort a request.
+	 */
+	scic_sds_io_request_handler_t abort_handler;
+
+	/**
+	 * The complete_handler specifies the method invoked when a user attempts to
+	 * complete a request.
+	 */
+	scic_sds_io_request_handler_t complete_handler;
+
+	scic_sds_io_request_task_completion_handler_t tc_completion_handler;
+	scic_sds_io_request_event_handler_t event_handler;
+	scic_sds_io_request_frame_handler_t frame_handler;
+
+};
+
+extern const struct sci_base_state scic_sds_io_request_started_task_mgmt_substate_table[];
+
+/**
+ * scic_sds_request_get_controller() -
+ *
+ * This macro will return the controller for this io request object
+ */
+#define scic_sds_request_get_controller(sci_req) \
+	((sci_req)->owning_controller)
+
+/**
+ * scic_sds_request_get_device() -
+ *
+ * This macro will return the device for this io request object
+ */
+#define scic_sds_request_get_device(sci_req) \
+	((sci_req)->target_device)
+
+/**
+ * scic_sds_request_get_port() -
+ *
+ * This macro will return the port for this io request object
+ */
+#define scic_sds_request_get_port(sci_req)	\
+	scic_sds_remote_device_get_port(scic_sds_request_get_device(sci_req))
+
+/**
+ * scic_sds_request_get_post_context() -
+ *
+ * This macro returns the constructed post context result for the io request.
+ */
+#define scic_sds_request_get_post_context(sci_req)	\
+	((sci_req)->post_context)
+
+/**
+ * scic_sds_request_get_task_context() -
+ *
+ * This is a helper macro to return the os handle for this request object.
+ */
+#define scic_sds_request_get_task_context(request) \
+	((request)->task_context_buffer)
+
+/**
+ * scic_sds_request_set_status() -
+ *
+ * This macro will set the scu hardware status and sci request completion
+ * status for an io request.
+ */
+#define scic_sds_request_set_status(request, scu_status_code, sci_status_code) \
+	{ \
+		(request)->scu_status = (scu_status_code); \
+		(request)->sci_status = (sci_status_code); \
+	}
+
+#define scic_sds_request_complete(a_request) \
+	((a_request)->state_handlers->complete_handler(a_request))
+
+
+extern enum sci_status
+scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completion_code);
+
+/**
+ * SCU_SGL_ZERO() -
+ *
+ * This macro zeros the hardware SGL element data
+ */
+#define SCU_SGL_ZERO(scu_sge) \
+	{ \
+		(scu_sge).length = 0; \
+		(scu_sge).address_lower = 0; \
+		(scu_sge).address_upper = 0; \
+		(scu_sge).address_modifier = 0;	\
+	}
+
+/**
+ * SCU_SGL_COPY() -
+ *
+ * This macro copys the SGL Element data from the host os to the hardware SGL
+ * elment data
+ */
+#define SCU_SGL_COPY(scu_sge, os_sge) \
+	{ \
+		(scu_sge).length = sg_dma_len(sg); \
+		(scu_sge).address_upper = \
+			upper_32_bits(sg_dma_address(sg)); \
+		(scu_sge).address_lower = \
+			lower_32_bits(sg_dma_address(sg)); \
+		(scu_sge).address_modifier = 0;	\
+	}
+
+void scic_sds_request_build_sgl(struct scic_sds_request *sci_req);
+void scic_sds_stp_request_assign_buffers(struct scic_sds_request *sci_req);
+void scic_sds_smp_request_assign_buffers(struct scic_sds_request *sci_req);
+enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req);
+enum sci_status scic_sds_io_request_terminate(struct scic_sds_request *sci_req);
+void scic_sds_io_request_copy_response(struct scic_sds_request *sci_req);
+enum sci_status scic_sds_io_request_event_handler(struct scic_sds_request *sci_req,
+						  u32 event_code);
+enum sci_status scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req,
+						  u32 frame_index);
+enum sci_status scic_sds_task_request_terminate(struct scic_sds_request *sci_req);
+enum sci_status scic_sds_request_started_state_abort_handler(struct scic_sds_request *sci_req);
+
+/**
+ * enum _scic_sds_io_request_started_task_mgmt_substates - This enumeration
+ *    depicts all of the substates for a task management request to be
+ *    performed in the STARTED super-state.
+ *
+ *
+ */
+enum scic_sds_raw_request_started_task_mgmt_substates {
+	/**
+	 * The AWAIT_TC_COMPLETION sub-state indicates that the started raw
+	 * task management request is waiting for the transmission of the
+	 * initial frame (i.e. command, task, etc.).
+	 */
+	SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION,
+
+	/**
+	 * This sub-state indicates that the started task management request
+	 * is waiting for the reception of an unsolicited frame
+	 * (i.e. response IU).
+	 */
+	SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE,
+};
+
+
+/**
+ * enum _scic_sds_smp_request_started_substates - This enumeration depicts all
+ *    of the substates for a SMP request to be performed in the STARTED
+ *    super-state.
+ *
+ *
+ */
+enum scic_sds_smp_request_started_substates {
+	/**
+	 * This sub-state indicates that the started task management request
+	 * is waiting for the reception of an unsolicited frame
+	 * (i.e. response IU).
+	 */
+	SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE,
+
+	/**
+	 * The AWAIT_TC_COMPLETION sub-state indicates that the started SMP request is
+	 * waiting for the transmission of the initial frame (i.e. command, task, etc.).
+	 */
+	SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION,
+};
+
+
+
+/* XXX open code in caller */
+static inline void *scic_request_get_virt_addr(struct scic_sds_request *sci_req,
+					       dma_addr_t phys_addr)
+{
+	struct isci_request *ireq = sci_req_to_ireq(sci_req);
+	dma_addr_t offset;
+
+	BUG_ON(phys_addr < ireq->request_daddr);
+
+	offset = phys_addr - ireq->request_daddr;
+
+	BUG_ON(offset >= sizeof(*ireq));
+
+	return (char *)ireq + offset;
+}
+
+/* XXX open code in caller */
+static inline dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sci_req,
+						      void *virt_addr)
+{
+	struct isci_request *ireq = sci_req_to_ireq(sci_req);
+
+	char *requested_addr = (char *)virt_addr;
+	char *base_addr = (char *)ireq;
+
+	BUG_ON(requested_addr < base_addr);
+	BUG_ON((requested_addr - base_addr) >= sizeof(*ireq));
+
+	return ireq->request_daddr + (requested_addr - base_addr);
+}
+
 /**
  * This function gets the status of the request object.
  * @request: This parameter points to the isci_request object
@@ -337,12 +750,6 @@ static inline void isci_request_unmap_sgl(
 	}
 }
 
-
-void isci_request_io_request_complete(
-	struct isci_host *isci_host,
-	struct isci_request *request,
-	enum sci_io_status completion_status);
-
 /**
  * isci_request_io_request_get_next_sge() - This function is called by the sci
  *    core to retrieve the next sge for a given request.
@@ -385,13 +792,16 @@ static inline void *isci_request_io_request_get_next_sge(
 	return ret;
 }
 
-
-void isci_terminate_pending_requests(
-	struct isci_host *isci_host,
-	struct isci_remote_device *isci_device,
-	enum isci_request_status new_request_state);
-
-
-
-
+void isci_terminate_pending_requests(struct isci_host *isci_host,
+				     struct isci_remote_device *isci_device,
+				     enum isci_request_status new_request_state);
+enum sci_status scic_task_request_construct(struct scic_sds_controller *scic,
+					    struct scic_sds_remote_device *sci_dev,
+					    u16 io_tag,
+					    struct scic_sds_request *sci_req);
+enum sci_status scic_task_request_construct_ssp(struct scic_sds_request *sci_req);
+enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req);
+enum sci_status scic_io_request_construct_smp(struct scic_sds_request *sci_req);
+void scic_stp_io_request_set_ncq_tag(struct scic_sds_request *sci_req, u16 ncq_tag);
+void scic_sds_smp_request_copy_response(struct scic_sds_request *sci_req);
 #endif /* !defined(_ISCI_REQUEST_H_) */

drivers/scsi/isci/sata.c

@@ -56,8 +56,6 @@
 #include <scsi/sas.h>
 #include "isci.h"
 #include "remote_device.h"
-#include "scic_io_request.h"
-#include "scic_task_request.h"
 #include "task.h"
 #include "request.h"
 #include "sata.h"

drivers/scsi/isci/core/scic_sds_smp_request.c → drivers/scsi/isci/smp_request.c

@@ -56,9 +56,7 @@
 #include <scsi/sas.h>
 #include "state_machine.h"
 #include "remote_device.h"
-#include "scic_sds_request.h"
-#include "scic_sds_smp_request.h"
-#include "sci_util.h"
+#include "request.h"
 #include "scu_completion_codes.h"
 #include "scu_task_context.h"
 #include "host.h"

drivers/scsi/isci/core/scic_sds_ssp_request.c → drivers/scsi/isci/ssp_request.c

@@ -54,10 +54,10 @@
  */
 
 #include "host.h"
+#include "request.h"
 #include "state_machine.h"
-#include "scic_sds_request.h"
-#include "scu_completion_codes.h"
 #include "scu_task_context.h"
+#include "scu_completion_codes.h"
 
 /**
  * This method processes the completions transport layer (TL) status to

drivers/scsi/isci/core/scic_sds_stp_request.c → drivers/scsi/isci/stp_request.c

@@ -56,13 +56,9 @@
 #include <scsi/sas.h>
 #include "sas.h"
 #include "state_machine.h"
-#include "scic_io_request.h"
 #include "remote_device.h"
-#include "scic_sds_request.h"
-#include "scic_sds_stp_pio_request.h"
-#include "scic_sds_stp_request.h"
+#include "stp_request.h"
 #include "unsolicited_frame_control.h"
-#include "sci_util.h"
 #include "scu_completion_codes.h"
 #include "scu_event_codes.h"
 #include "scu_task_context.h"

drivers/scsi/isci/core/scic_sds_stp_request.h → drivers/scsi/isci/stp_request.h

@@ -152,27 +152,44 @@ enum scic_sds_stp_request_started_soft_reset_substates {
 	SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE,
 };
 
-u32 scic_sds_stp_request_get_object_size(void);
-
-enum sci_status scic_sds_stp_pio_request_construct(
-	struct scic_sds_request *scic_io_request,
-	bool copy_rx_frame);
-
-enum sci_status scic_sds_stp_udma_request_construct(
-	struct scic_sds_request *sci_req,
-	u32 transfer_length,
-	enum dma_data_direction dir);
-
-enum sci_status scic_sds_stp_non_data_request_construct(
-	struct scic_sds_request *sci_req);
-
-enum sci_status scic_sds_stp_soft_reset_request_construct(
-	struct scic_sds_request *sci_req);
-
-enum sci_status scic_sds_stp_ncq_request_construct(
-	struct scic_sds_request *sci_req,
-	u32 transfer_length,
-	enum dma_data_direction dir);
-
+/* This is the enumeration of the SATA PIO DATA IN started substate machine. */
+enum _scic_sds_stp_request_started_pio_substates {
+	/**
+	 * While in this state the IO request object is waiting for the TC completion
+	 * notification for the H2D Register FIS
+	 */
+	SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE,
+
+	/**
+	 * While in this state the IO request object is waiting for either a PIO Setup
+	 * FIS or a D2H register FIS.  The type of frame received is based on the
+	 * result of the prior frame and line conditions.
+	 */
+	SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE,
+
+	/**
+	 * While in this state the IO request object is waiting for a DATA frame from
+	 * the device.
+	 */
+	SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE,
+
+	/**
+	 * While in this state the IO request object is waiting to transmit the next data
+	 * frame to the device.
+	 */
+	SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE,
+};
 
+struct scic_sds_request;
+
+enum sci_status scic_sds_stp_pio_request_construct(struct scic_sds_request *sci_req,
+						   bool copy_rx_frame);
+enum sci_status scic_sds_stp_udma_request_construct(struct scic_sds_request *sci_req,
+						    u32 transfer_length,
+						    enum dma_data_direction dir);
+enum sci_status scic_sds_stp_non_data_request_construct(struct scic_sds_request *sci_req);
+enum sci_status scic_sds_stp_soft_reset_request_construct(struct scic_sds_request *sci_req);
+enum sci_status scic_sds_stp_ncq_request_construct(struct scic_sds_request *sci_req,
+						   u32 transfer_length,
+						   enum dma_data_direction dir);
 #endif /* _SCIC_SDS_STP_REQUEST_T_ */

drivers/scsi/isci/task.c

@@ -56,15 +56,12 @@
 #include <linux/completion.h>
 #include <linux/irqflags.h>
 #include "sas.h"
-#include "scic_task_request.h"
-#include "scic_io_request.h"
 #include "remote_device.h"
 #include "remote_node_context.h"
 #include "isci.h"
 #include "request.h"
 #include "sata.h"
 #include "task.h"
-#include "scic_sds_request.h"
 #include "timers.h"
 
 /**

drivers/scsi/isci/unsolicited_frame_control.c

@@ -56,7 +56,6 @@
 #include "host.h"
 #include "unsolicited_frame_control.h"
 #include "registers.h"
-#include "sci_util.h"
 
 /**
  * This method will program the unsolicited frames (UFs) into the UF address
@@ -93,10 +92,8 @@ static void scic_sds_unsolicited_frame_control_construct_frames(
 	for (index = 0; index < unused_uf_header_entries; index++) {
 		uf = &uf_control->buffers.array[index];
 
-		sci_cb_make_physical_address(
-			uf_control->address_table.array[index], 0, 0
-			);
 		uf->buffer = NULL;
+		uf_control->address_table.array[index] = 0;
 		uf->header = &uf_control->headers.array[index];
 		uf->state  = UNSOLICITED_FRAME_EMPTY;
 	}