2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27 * All rights reserved.
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
33 * * Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * * Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in
37 * the documentation and/or other materials provided with the
39 * * Neither the name of Intel Corporation nor the names of its
40 * contributors may be used to endorse or promote products derived
41 * from this software without specific prior written permission.
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 #include <linux/completion.h>
57 #include <linux/irqflags.h>
58 #include "scic_task_request.h"
59 #include "scic_remote_device.h"
60 #include "scic_io_request.h"
61 #include "scic_sds_remote_device.h"
62 #include "scic_sds_remote_node_context.h"
69 * isci_task_refuse() - complete the request to the upper layer driver in
70 * the case where an I/O needs to be completed back in the submit path.
71 * @ihost: host on which the the request was queued
72 * @task: request to complete
73 * @response: response code for the completed task.
74 * @status: status code for the completed task.
77 static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task,
78 enum service_response response,
79 enum exec_status status)
82 enum isci_completion_selection disposition;
84 disposition = isci_perform_normal_io_completion;
85 disposition = isci_task_set_completion_status(task, response, status,
88 /* Tasks aborted specifically by a call to the lldd_abort_task
89 * function should not be completed to the host in the regular path.
91 switch (disposition) {
92 case isci_perform_normal_io_completion:
93 /* Normal notification (task_done) */
94 dev_dbg(&ihost->pdev->dev,
95 "%s: Normal - task = %p, response=%d, "
97 __func__, task, response, status);
99 task->lldd_task = NULL;
101 isci_execpath_callback(ihost, task, task->task_done);
104 case isci_perform_aborted_io_completion:
105 /* No notification because this request is already in the
108 dev_warn(&ihost->pdev->dev,
109 "%s: Aborted - task = %p, response=%d, "
111 __func__, task, response, status);
114 case isci_perform_error_io_completion:
115 /* Use sas_task_abort */
116 dev_warn(&ihost->pdev->dev,
117 "%s: Error - task = %p, response=%d, "
119 __func__, task, response, status);
121 isci_execpath_callback(ihost, task, sas_task_abort);
125 dev_warn(&ihost->pdev->dev,
126 "%s: isci task notification default case!",
128 sas_task_abort(task);
133 #define for_each_sas_task(num, task) \
134 for (; num > 0; num--,\
135 task = list_entry(task->list.next, struct sas_task, list))
138 * isci_task_execute_task() - This function is one of the SAS Domain Template
139 * functions. This function is called by libsas to send a task down to
141 * @task: This parameter specifies the SAS task to send.
142 * @num: This parameter specifies the number of tasks to queue.
143 * @gfp_flags: This parameter specifies the context of this call.
145 * status, zero indicates success.
147 int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags)
149 struct isci_host *ihost = task->dev->port->ha->lldd_ha;
150 struct isci_request *request = NULL;
151 struct isci_remote_device *device;
154 enum sci_status status;
155 enum isci_status device_status;
157 dev_dbg(&ihost->pdev->dev, "%s: num=%d\n", __func__, num);
159 /* Check if we have room for more tasks */
160 ret = isci_host_can_queue(ihost, num);
163 dev_warn(&ihost->pdev->dev, "%s: queue full\n", __func__);
167 for_each_sas_task(num, task) {
168 dev_dbg(&ihost->pdev->dev,
169 "task = %p, num = %d; dev = %p; cmd = %p\n",
170 task, num, task->dev, task->uldd_task);
172 device = isci_dev_from_domain_dev(task->dev);
175 device_status = device->status;
177 device_status = isci_freed;
179 /* From this point onward, any process that needs to guarantee
180 * that there is no kernel I/O being started will have to wait
181 * for the quiesce spinlock.
184 if (device_status != isci_ready_for_io) {
186 /* Forces a retry from scsi mid layer. */
187 dev_warn(&ihost->pdev->dev,
188 "%s: task %p: isci_host->status = %d, "
189 "device = %p; device_status = 0x%x\n\n",
192 isci_host_get_state(ihost),
193 device, device_status);
195 if (device_status == isci_ready) {
196 /* Indicate QUEUE_FULL so that the scsi midlayer
199 isci_task_refuse(ihost, task,
203 /* Else, the device is going down. */
204 isci_task_refuse(ihost, task,
205 SAS_TASK_UNDELIVERED,
208 isci_host_can_dequeue(ihost, 1);
210 /* There is a device and it's ready for I/O. */
211 spin_lock_irqsave(&task->task_state_lock, flags);
213 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
215 spin_unlock_irqrestore(&task->task_state_lock,
218 isci_task_refuse(ihost, task,
219 SAS_TASK_UNDELIVERED,
220 SAM_STAT_TASK_ABORTED);
222 /* The I/O was aborted. */
225 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
226 spin_unlock_irqrestore(&task->task_state_lock, flags);
228 /* build and send the request. */
229 status = isci_request_execute(ihost, task, &request,
232 if (status != SCI_SUCCESS) {
234 spin_lock_irqsave(&task->task_state_lock, flags);
235 /* Did not really start this command. */
236 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
237 spin_unlock_irqrestore(&task->task_state_lock, flags);
239 /* Indicate QUEUE_FULL so that the scsi
240 * midlayer retries. if the request
241 * failed for remote device reasons,
242 * it gets returned as
243 * SAS_TASK_UNDELIVERED next time
246 isci_task_refuse(ihost, task,
249 isci_host_can_dequeue(ihost, 1);
260 * isci_task_request_build() - This function builds the task request object.
261 * @isci_host: This parameter specifies the ISCI host object
262 * @request: This parameter points to the isci_request object allocated in the
263 * request construct function.
264 * @tmf: This parameter is the task management struct to be built
266 * SCI_SUCCESS on successfull completion, or specific failure code.
268 static enum sci_status isci_task_request_build(
269 struct isci_host *isci_host,
270 struct isci_request **isci_request,
271 struct isci_tmf *isci_tmf)
273 struct scic_sds_remote_device *sci_device;
274 enum sci_status status = SCI_FAILURE;
275 struct isci_request *request;
276 struct isci_remote_device *isci_device;
277 /* struct sci_sas_identify_address_frame_protocols dev_protocols; */
278 struct smp_discover_response_protocols dev_protocols;
281 dev_dbg(&isci_host->pdev->dev,
282 "%s: isci_tmf = %p\n", __func__, isci_tmf);
284 isci_device = isci_tmf->device;
285 sci_device = to_sci_dev(isci_device);
287 /* do common allocation and init of request object. */
288 status = isci_request_alloc_tmf(
296 if (status != SCI_SUCCESS)
299 /* let the core do it's construct. */
300 status = scic_task_request_construct(
301 isci_host->core_controller,
303 SCI_CONTROLLER_INVALID_IO_TAG,
305 request->sci_request_mem_ptr,
306 &request->sci_request_handle
309 if (status != SCI_SUCCESS) {
310 dev_warn(&isci_host->pdev->dev,
311 "%s: scic_task_request_construct failed - "
318 sci_object_set_association(
319 request->sci_request_handle,
323 scic_remote_device_get_protocols(
328 /* let the core do it's protocol
329 * specific construction.
331 if (dev_protocols.u.bits.attached_ssp_target) {
333 isci_tmf->proto = SAS_PROTOCOL_SSP;
334 status = scic_task_request_construct_ssp(
335 request->sci_request_handle
337 if (status != SCI_SUCCESS)
341 if (dev_protocols.u.bits.attached_stp_target) {
343 isci_tmf->proto = SAS_PROTOCOL_SATA;
344 status = isci_sata_management_task_request_build(request);
346 if (status != SCI_SUCCESS)
354 /* release the dma memory if we fail. */
355 isci_request_free(isci_host, request);
359 *isci_request = request;
364 * isci_tmf_timeout_cb() - This function is called as a kernel callback when
365 * the timeout period for the TMF has expired.
369 static void isci_tmf_timeout_cb(void *tmf_request_arg)
371 struct isci_request *request = (struct isci_request *)tmf_request_arg;
372 struct isci_tmf *tmf = isci_request_access_tmf(request);
373 enum sci_status status;
375 BUG_ON(request->ttype != tmf_task);
377 /* This task management request has timed-out. Terminate the request
378 * so that the request eventually completes to the requestor in the
379 * request completion callback path.
381 /* Note - the timer callback function itself has provided spinlock
382 * exclusion from the start and completion paths. No need to take
383 * the request->isci_host->scic_lock here.
386 if (tmf->timeout_timer != NULL) {
387 /* Call the users callback, if any. */
388 if (tmf->cb_state_func != NULL)
389 tmf->cb_state_func(isci_tmf_timed_out, tmf,
392 /* Terminate the TMF transmit request. */
393 status = scic_controller_terminate_request(
394 request->isci_host->core_controller,
395 to_sci_dev(request->isci_device),
396 request->sci_request_handle
399 dev_dbg(&request->isci_host->pdev->dev,
400 "%s: tmf_request = %p; tmf = %p; status = %d\n",
401 __func__, request, tmf, status);
403 dev_dbg(&request->isci_host->pdev->dev,
404 "%s: timer already canceled! "
405 "tmf_request = %p; tmf = %p\n",
406 __func__, request, tmf);
408 /* No need to unlock since the caller to this callback is doing it for
410 * request->isci_host->scic_lock
415 * isci_task_execute_tmf() - This function builds and sends a task request,
416 * then waits for the completion.
417 * @isci_host: This parameter specifies the ISCI host object
418 * @tmf: This parameter is the pointer to the task management structure for
420 * @timeout_ms: This parameter specifies the timeout period for the task
421 * management request.
423 * TMF_RESP_FUNC_COMPLETE on successful completion of the TMF (this includes
424 * error conditions reported in the IU status), or TMF_RESP_FUNC_FAILED.
426 int isci_task_execute_tmf(
427 struct isci_host *isci_host,
428 struct isci_tmf *tmf,
429 unsigned long timeout_ms)
431 DECLARE_COMPLETION_ONSTACK(completion);
432 enum sci_status status = SCI_FAILURE;
433 struct scic_sds_remote_device *sci_device;
434 struct isci_remote_device *isci_device = tmf->device;
435 struct isci_request *request;
436 int ret = TMF_RESP_FUNC_FAILED;
439 /* sanity check, return TMF_RESP_FUNC_FAILED
440 * if the device is not there and ready.
442 if (!isci_device || isci_device->status != isci_ready_for_io) {
443 dev_dbg(&isci_host->pdev->dev,
444 "%s: isci_device = %p not ready (%d)\n",
446 isci_device, isci_device->status);
447 return TMF_RESP_FUNC_FAILED;
449 dev_dbg(&isci_host->pdev->dev,
450 "%s: isci_device = %p\n",
451 __func__, isci_device);
453 sci_device = to_sci_dev(isci_device);
455 /* Assign the pointer to the TMF's completion kernel wait structure. */
456 tmf->complete = &completion;
458 isci_task_request_build(
465 dev_warn(&isci_host->pdev->dev,
466 "%s: isci_task_request_build failed\n",
468 return TMF_RESP_FUNC_FAILED;
471 /* Allocate the TMF timeout timer. */
472 spin_lock_irqsave(&isci_host->scic_lock, flags);
473 tmf->timeout_timer = isci_timer_create(isci_host, request, isci_tmf_timeout_cb);
475 /* Start the timer. */
476 if (tmf->timeout_timer)
477 isci_timer_start(tmf->timeout_timer, timeout_ms);
479 dev_warn(&isci_host->pdev->dev,
480 "%s: isci_timer_create failed!!!!\n",
483 /* start the TMF io. */
484 status = scic_controller_start_task(
485 isci_host->core_controller,
487 request->sci_request_handle,
488 SCI_CONTROLLER_INVALID_IO_TAG
491 if (status != SCI_SUCCESS) {
492 dev_warn(&isci_host->pdev->dev,
493 "%s: start_io failed - status = 0x%x, request = %p\n",
497 goto cleanup_request;
500 /* Call the users callback, if any. */
501 if (tmf->cb_state_func != NULL)
502 tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data);
504 /* Change the state of the TMF-bearing request to "started". */
505 isci_request_change_state(request, started);
507 /* add the request to the remote device request list. */
508 list_add(&request->dev_node, &isci_device->reqs_in_process);
510 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
512 /* Wait for the TMF to complete, or a timeout. */
513 wait_for_completion(&completion);
517 if (tmf->status == SCI_SUCCESS)
518 ret = TMF_RESP_FUNC_COMPLETE;
519 else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) {
520 dev_dbg(&isci_host->pdev->dev,
522 "SCI_FAILURE_IO_RESPONSE_VALID\n",
524 ret = TMF_RESP_FUNC_COMPLETE;
526 /* Else - leave the default "failed" status alone. */
528 dev_dbg(&isci_host->pdev->dev,
529 "%s: completed request = %p\n",
533 if (request->io_request_completion != NULL) {
535 /* The fact that this is non-NULL for a TMF request
536 * means there is a thread waiting for this TMF to
539 complete(request->io_request_completion);
542 spin_lock_irqsave(&isci_host->scic_lock, flags);
546 /* Clean up the timer if needed. */
547 if (tmf->timeout_timer) {
548 isci_del_timer(isci_host, tmf->timeout_timer);
549 tmf->timeout_timer = NULL;
552 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
554 isci_request_free(isci_host, request);
559 void isci_task_build_tmf(
560 struct isci_tmf *tmf,
561 struct isci_remote_device *isci_device,
562 enum isci_tmf_function_codes code,
563 void (*tmf_sent_cb)(enum isci_tmf_cb_state,
568 dev_dbg(&isci_device->isci_port->isci_host->pdev->dev,
569 "%s: isci_device = %p\n", __func__, isci_device);
571 memset(tmf, 0, sizeof(*tmf));
573 tmf->device = isci_device;
574 tmf->tmf_code = code;
575 tmf->timeout_timer = NULL;
576 tmf->cb_state_func = tmf_sent_cb;
577 tmf->cb_data = cb_data;
580 static void isci_task_build_abort_task_tmf(
581 struct isci_tmf *tmf,
582 struct isci_remote_device *isci_device,
583 enum isci_tmf_function_codes code,
584 void (*tmf_sent_cb)(enum isci_tmf_cb_state,
587 struct isci_request *old_request)
589 isci_task_build_tmf(tmf, isci_device, code, tmf_sent_cb,
590 (void *)old_request);
591 tmf->io_tag = old_request->io_tag;
594 static struct isci_request *isci_task_get_request_from_task(
595 struct sas_task *task,
596 struct isci_host **isci_host,
597 struct isci_remote_device **isci_device)
600 struct isci_request *request = NULL;
603 spin_lock_irqsave(&task->task_state_lock, flags);
605 request = task->lldd_task;
607 /* If task is already done, the request isn't valid */
608 if (!(task->task_state_flags & SAS_TASK_STATE_DONE) &&
609 (task->task_state_flags & SAS_TASK_AT_INITIATOR) &&
612 if (isci_host != NULL)
613 *isci_host = request->isci_host;
615 if (isci_device != NULL)
616 *isci_device = request->isci_device;
619 spin_unlock_irqrestore(&task->task_state_lock, flags);
625 * isci_task_validate_request_to_abort() - This function checks the given I/O
626 * against the "started" state. If the request is still "started", it's
627 * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD
628 * BEFORE CALLING THIS FUNCTION.
629 * @isci_request: This parameter specifies the request object to control.
630 * @isci_host: This parameter specifies the ISCI host object
631 * @isci_device: This is the device to which the request is pending.
632 * @aborted_io_completion: This is a completion structure that will be added to
633 * the request in case it is changed to aborting; this completion is
634 * triggered when the request is fully completed.
636 * Either "started" on successful change of the task status to "aborted", or
637 * "unallocated" if the task cannot be controlled.
639 static enum isci_request_status isci_task_validate_request_to_abort(
640 struct isci_request *isci_request,
641 struct isci_host *isci_host,
642 struct isci_remote_device *isci_device,
643 struct completion *aborted_io_completion)
645 enum isci_request_status old_state = unallocated;
647 /* Only abort the task if it's in the
648 * device's request_in_process list
650 if (isci_request && !list_empty(&isci_request->dev_node)) {
651 old_state = isci_request_change_started_to_aborted(
652 isci_request, aborted_io_completion);
659 static void isci_request_cleanup_completed_loiterer(
660 struct isci_host *isci_host,
661 struct isci_remote_device *isci_device,
662 struct isci_request *isci_request)
664 struct sas_task *task;
667 task = (isci_request->ttype == io_task)
668 ? isci_request_access_task(isci_request)
671 dev_dbg(&isci_host->pdev->dev,
672 "%s: isci_device=%p, request=%p, task=%p\n",
673 __func__, isci_device, isci_request, task);
675 spin_lock_irqsave(&isci_host->scic_lock, flags);
676 list_del_init(&isci_request->dev_node);
677 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
681 spin_lock_irqsave(&task->task_state_lock, flags);
682 task->lldd_task = NULL;
684 isci_set_task_doneflags(task);
686 /* If this task is not in the abort path, call task_done. */
687 if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
689 spin_unlock_irqrestore(&task->task_state_lock, flags);
690 task->task_done(task);
692 spin_unlock_irqrestore(&task->task_state_lock, flags);
694 isci_request_free(isci_host, isci_request);
698 * @isci_termination_timed_out(): this function will deal with a request for
699 * which the wait for termination has timed-out.
701 * @isci_host This SCU.
702 * @isci_request The I/O request being terminated.
705 isci_termination_timed_out(
706 struct isci_host * host,
707 struct isci_request * request
710 unsigned long state_flags;
712 dev_warn(&host->pdev->dev,
713 "%s: host = %p; request = %p\n",
714 __func__, host, request);
716 /* At this point, the request to terminate
717 * has timed out. The best we can do is to
718 * have the request die a silent death
719 * if it ever completes.
721 spin_lock_irqsave(&request->state_lock, state_flags);
723 if (request->status == started) {
725 /* Set the request state to "dead",
726 * and clear the task pointer so that an actual
727 * completion event callback doesn't do
730 request->status = dead;
732 /* Clear the timeout completion event pointer.*/
733 request->io_request_completion = NULL;
735 if (request->ttype == io_task) {
737 /* Break links with the sas_task. */
738 if (request->ttype_ptr.io_task_ptr != NULL) {
740 request->ttype_ptr.io_task_ptr->lldd_task = NULL;
741 request->ttype_ptr.io_task_ptr = NULL;
745 spin_unlock_irqrestore(&request->state_lock, state_flags);
750 * isci_terminate_request_core() - This function will terminate the given
751 * request, and wait for it to complete. This function must only be called
752 * from a thread that can wait. Note that the request is terminated and
753 * completed (back to the host, if started there).
754 * @isci_host: This SCU.
755 * @isci_device: The target.
756 * @isci_request: The I/O request to be terminated.
760 static void isci_terminate_request_core(
761 struct isci_host *isci_host,
762 struct isci_remote_device *isci_device,
763 struct isci_request *isci_request)
765 enum sci_status status = SCI_SUCCESS;
766 bool was_terminated = false;
767 bool needs_cleanup_handling = false;
768 enum isci_request_status request_status;
770 unsigned long timeout_remaining;
773 dev_dbg(&isci_host->pdev->dev,
774 "%s: device = %p; request = %p\n",
775 __func__, isci_device, isci_request);
777 spin_lock_irqsave(&isci_host->scic_lock, flags);
779 /* Note that we are not going to control
780 * the target to abort the request.
782 isci_request->complete_in_target = true;
784 /* Make sure the request wasn't just sitting around signalling
785 * device condition (if the request handle is NULL, then the
786 * request completed but needed additional handling here).
788 if (isci_request->sci_request_handle != NULL) {
789 was_terminated = true;
790 needs_cleanup_handling = true;
791 status = scic_controller_terminate_request(
792 isci_host->core_controller,
793 to_sci_dev(isci_device),
794 isci_request->sci_request_handle
797 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
800 * The only time the request to terminate will
801 * fail is when the io request is completed and
804 if (status != SCI_SUCCESS) {
805 dev_err(&isci_host->pdev->dev,
806 "%s: scic_controller_terminate_request"
807 " returned = 0x%x\n",
810 /* Clear the completion pointer from the request. */
811 isci_request->io_request_completion = NULL;
814 if (was_terminated) {
815 dev_dbg(&isci_host->pdev->dev,
816 "%s: before completion wait (%p)\n",
818 isci_request->io_request_completion);
820 /* Wait here for the request to complete. */
821 #define TERMINATION_TIMEOUT_MSEC 50
823 = wait_for_completion_timeout(
824 isci_request->io_request_completion,
825 msecs_to_jiffies(TERMINATION_TIMEOUT_MSEC));
827 if (!timeout_remaining) {
829 isci_termination_timed_out(isci_host,
832 dev_err(&isci_host->pdev->dev,
833 "%s: *** Timeout waiting for "
834 "termination(%p/%p)\n",
836 isci_request->io_request_completion,
840 dev_dbg(&isci_host->pdev->dev,
841 "%s: after completion wait (%p)\n",
843 isci_request->io_request_completion);
845 /* Clear the completion pointer from the request. */
846 isci_request->io_request_completion = NULL;
848 /* Peek at the status of the request. This will tell
849 * us if there was special handling on the request such that it
850 * needs to be detached and freed here.
852 spin_lock_irqsave(&isci_request->state_lock, flags);
853 request_status = isci_request_get_state(isci_request);
855 if ((isci_request->ttype == io_task) /* TMFs are in their own thread */
856 && ((request_status == aborted)
857 || (request_status == aborting)
858 || (request_status == terminating)
859 || (request_status == completed)
860 || (request_status == dead)
864 /* The completion routine won't free a request in
865 * the aborted/aborting/etc. states, so we do
868 needs_cleanup_handling = true;
870 spin_unlock_irqrestore(&isci_request->state_lock, flags);
872 if (needs_cleanup_handling)
873 isci_request_cleanup_completed_loiterer(
874 isci_host, isci_device, isci_request
879 static void isci_terminate_request(
880 struct isci_host *isci_host,
881 struct isci_remote_device *isci_device,
882 struct isci_request *isci_request,
883 enum isci_request_status new_request_state)
885 enum isci_request_status old_state;
886 DECLARE_COMPLETION_ONSTACK(request_completion);
888 /* Change state to "new_request_state" if it is currently "started" */
889 old_state = isci_request_change_started_to_newstate(
895 if ((old_state == started) ||
896 (old_state == completed) ||
897 (old_state == aborting)) {
899 /* If the old_state is started:
900 * This request was not already being aborted. If it had been,
901 * then the aborting I/O (ie. the TMF request) would not be in
902 * the aborting state, and thus would be terminated here. Note
903 * that since the TMF completion's call to the kernel function
904 * "complete()" does not happen until the pending I/O request
905 * terminate fully completes, we do not have to implement a
906 * special wait here for already aborting requests - the
907 * termination of the TMF request will force the request
908 * to finish it's already started terminate.
910 * If old_state == completed:
911 * This request completed from the SCU hardware perspective
912 * and now just needs cleaning up in terms of freeing the
913 * request and potentially calling up to libsas.
915 * If old_state == aborting:
916 * This request has already gone through a TMF timeout, but may
917 * not have been terminated; needs cleaning up at least.
919 isci_terminate_request_core(isci_host, isci_device,
925 * isci_terminate_pending_requests() - This function will change the all of the
926 * requests on the given device's state to "aborting", will terminate the
927 * requests, and wait for them to complete. This function must only be
928 * called from a thread that can wait. Note that the requests are all
929 * terminated and completed (back to the host, if started there).
930 * @isci_host: This parameter specifies SCU.
931 * @isci_device: This parameter specifies the target.
935 void isci_terminate_pending_requests(
936 struct isci_host *isci_host,
937 struct isci_remote_device *isci_device,
938 enum isci_request_status new_request_state)
940 struct isci_request *request;
941 struct isci_request *next_request;
943 struct list_head aborted_request_list;
945 INIT_LIST_HEAD(&aborted_request_list);
947 dev_dbg(&isci_host->pdev->dev,
948 "%s: isci_device = %p (new request state = %d)\n",
949 __func__, isci_device, new_request_state);
951 spin_lock_irqsave(&isci_host->scic_lock, flags);
953 /* Move all of the pending requests off of the device list. */
954 list_splice_init(&isci_device->reqs_in_process,
955 &aborted_request_list);
957 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
959 /* Iterate through the now-local list. */
960 list_for_each_entry_safe(request, next_request,
961 &aborted_request_list, dev_node) {
963 dev_warn(&isci_host->pdev->dev,
964 "%s: isci_device=%p request=%p; task=%p\n",
966 isci_device, request,
967 ((request->ttype == io_task)
968 ? isci_request_access_task(request)
971 /* Mark all still pending I/O with the selected next
972 * state, terminate and free it.
974 isci_terminate_request(isci_host, isci_device,
975 request, new_request_state
981 * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain
982 * Template functions.
983 * @lun: This parameter specifies the lun to be reset.
985 * status, zero indicates success.
987 static int isci_task_send_lu_reset_sas(
988 struct isci_host *isci_host,
989 struct isci_remote_device *isci_device,
993 int ret = TMF_RESP_FUNC_FAILED;
995 dev_dbg(&isci_host->pdev->dev,
996 "%s: isci_host = %p, isci_device = %p\n",
997 __func__, isci_host, isci_device);
998 /* Send the LUN reset to the target. By the time the call returns,
999 * the TMF has fully exected in the target (in which case the return
1000 * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or
1001 * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED").
1003 isci_task_build_tmf(&tmf, isci_device, isci_tmf_ssp_lun_reset, NULL,
1006 #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */
1007 ret = isci_task_execute_tmf(isci_host, &tmf, ISCI_LU_RESET_TIMEOUT_MS);
1009 if (ret == TMF_RESP_FUNC_COMPLETE)
1010 dev_dbg(&isci_host->pdev->dev,
1011 "%s: %p: TMF_LU_RESET passed\n",
1012 __func__, isci_device);
1014 dev_dbg(&isci_host->pdev->dev,
1015 "%s: %p: TMF_LU_RESET failed (%x)\n",
1016 __func__, isci_device, ret);
1022 * isci_task_lu_reset() - This function is one of the SAS Domain Template
1023 * functions. This is one of the Task Management functoins called by libsas,
1024 * to reset the given lun. Note the assumption that while this call is
1025 * executing, no I/O will be sent by the host to the device.
1026 * @lun: This parameter specifies the lun to be reset.
1028 * status, zero indicates success.
1030 int isci_task_lu_reset(
1031 struct domain_device *domain_device,
1034 struct isci_host *isci_host = NULL;
1035 struct isci_remote_device *isci_device = NULL;
1037 bool device_stopping = false;
1039 if (domain_device == NULL) {
1040 pr_warn("%s: domain_device == NULL\n", __func__);
1041 return TMF_RESP_FUNC_FAILED;
1044 isci_device = isci_dev_from_domain_dev(domain_device);
1046 if (domain_device->port != NULL)
1047 isci_host = isci_host_from_sas_ha(domain_device->port->ha);
1049 pr_debug("%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
1050 __func__, domain_device, isci_host, isci_device);
1052 if (isci_device != NULL)
1053 device_stopping = (isci_device->status == isci_stopping)
1054 || (isci_device->status == isci_stopped);
1056 /* If there is a device reset pending on any request in the
1057 * device's list, fail this LUN reset request in order to
1058 * escalate to the device reset.
1060 if ((isci_device == NULL) ||
1061 (isci_host == NULL) ||
1062 ((isci_host != NULL) &&
1063 (isci_device != NULL) &&
1065 (isci_device_is_reset_pending(isci_host, isci_device))))) {
1066 dev_warn(&isci_host->pdev->dev,
1067 "%s: No dev (%p), no host (%p), or "
1068 "RESET PENDING: domain_device=%p\n",
1069 __func__, isci_device, isci_host, domain_device);
1070 return TMF_RESP_FUNC_FAILED;
1073 /* Send the task management part of the reset. */
1074 if (sas_protocol_ata(domain_device->tproto)) {
1075 ret = isci_task_send_lu_reset_sata(
1076 isci_host, isci_device, lun
1079 ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun);
1081 /* If the LUN reset worked, all the I/O can now be terminated. */
1082 if (ret == TMF_RESP_FUNC_COMPLETE)
1083 /* Terminate all I/O now. */
1084 isci_terminate_pending_requests(isci_host,
1092 /* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */
1093 int isci_task_clear_nexus_port(struct asd_sas_port *port)
1095 return TMF_RESP_FUNC_FAILED;
1100 int isci_task_clear_nexus_ha(struct sas_ha_struct *ha)
1102 return TMF_RESP_FUNC_FAILED;
1105 int isci_task_I_T_nexus_reset(struct domain_device *dev)
1107 return TMF_RESP_FUNC_FAILED;
1111 /* Task Management Functions. Must be called from process context. */
1114 * isci_abort_task_process_cb() - This is a helper function for the abort task
1115 * TMF command. It manages the request state with respect to the successful
1116 * transmission / completion of the abort task request.
1117 * @cb_state: This parameter specifies when this function was called - after
1118 * the TMF request has been started and after it has timed-out.
1119 * @tmf: This parameter specifies the TMF in progress.
1123 static void isci_abort_task_process_cb(
1124 enum isci_tmf_cb_state cb_state,
1125 struct isci_tmf *tmf,
1128 struct isci_request *old_request;
1130 old_request = (struct isci_request *)cb_data;
1132 dev_dbg(&old_request->isci_host->pdev->dev,
1133 "%s: tmf=%p, old_request=%p\n",
1134 __func__, tmf, old_request);
1138 case isci_tmf_started:
1139 /* The TMF has been started. Nothing to do here, since the
1140 * request state was already set to "aborted" by the abort
1143 BUG_ON((old_request->status != aborted)
1144 && (old_request->status != completed));
1147 case isci_tmf_timed_out:
1149 /* Set the task's state to "aborting", since the abort task
1150 * function thread set it to "aborted" (above) in anticipation
1151 * of the task management request working correctly. Since the
1152 * timeout has now fired, the TMF request failed. We set the
1153 * state such that the request completion will indicate the
1154 * device is no longer present.
1156 isci_request_change_state(old_request, aborting);
1160 dev_err(&old_request->isci_host->pdev->dev,
1161 "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n",
1162 __func__, cb_state, tmf, old_request);
1168 * isci_task_abort_task() - This function is one of the SAS Domain Template
1169 * functions. This function is called by libsas to abort a specified task.
1170 * @task: This parameter specifies the SAS task to abort.
1172 * status, zero indicates success.
1174 int isci_task_abort_task(struct sas_task *task)
1176 DECLARE_COMPLETION_ONSTACK(aborted_io_completion);
1177 struct isci_request *old_request = NULL;
1178 enum isci_request_status old_state;
1179 struct isci_remote_device *isci_device = NULL;
1180 struct isci_host *isci_host = NULL;
1181 struct isci_tmf tmf;
1182 int ret = TMF_RESP_FUNC_FAILED;
1183 unsigned long flags;
1184 bool any_dev_reset = false;
1185 bool device_stopping;
1187 /* Get the isci_request reference from the task. Note that
1188 * this check does not depend on the pending request list
1189 * in the device, because tasks driving resets may land here
1190 * after completion in the core.
1192 old_request = isci_task_get_request_from_task(task, &isci_host,
1195 dev_dbg(&isci_host->pdev->dev,
1196 "%s: task = %p\n", __func__, task);
1198 /* Check if the device has been / is currently being removed.
1199 * If so, no task management will be done, and the I/O will
1202 device_stopping = (isci_device->status == isci_stopping)
1203 || (isci_device->status == isci_stopped);
1205 /* This version of the driver will fail abort requests for
1206 * SATA/STP. Failing the abort request this way will cause the
1207 * SCSI error handler thread to escalate to LUN reset
1209 if (sas_protocol_ata(task->task_proto) && !device_stopping) {
1210 dev_warn(&isci_host->pdev->dev,
1211 " task %p is for a STP/SATA device;"
1212 " returning TMF_RESP_FUNC_FAILED\n"
1213 " to cause a LUN reset...\n", task);
1214 return TMF_RESP_FUNC_FAILED;
1217 dev_dbg(&isci_host->pdev->dev,
1218 "%s: old_request == %p\n", __func__, old_request);
1220 if (!device_stopping)
1221 any_dev_reset = isci_device_is_reset_pending(isci_host,isci_device);
1223 spin_lock_irqsave(&task->task_state_lock, flags);
1225 /* Don't do resets to stopping devices. */
1226 if (device_stopping) {
1228 task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET;
1229 any_dev_reset = false;
1231 } else /* See if there is a pending device reset for this device. */
1232 any_dev_reset = any_dev_reset
1233 || (task->task_state_flags & SAS_TASK_NEED_DEV_RESET);
1235 /* If the extraction of the request reference from the task
1236 * failed, then the request has been completed (or if there is a
1237 * pending reset then this abort request function must be failed
1238 * in order to escalate to the target reset).
1240 if ((old_request == NULL) || any_dev_reset) {
1242 /* If the device reset task flag is set, fail the task
1243 * management request. Otherwise, the original request
1246 if (any_dev_reset) {
1248 /* Turn off the task's DONE to make sure this
1249 * task is escalated to a target reset.
1251 task->task_state_flags &= ~SAS_TASK_STATE_DONE;
1253 /* Make the reset happen as soon as possible. */
1254 task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
1256 spin_unlock_irqrestore(&task->task_state_lock, flags);
1258 /* Fail the task management request in order to
1259 * escalate to the target reset.
1261 ret = TMF_RESP_FUNC_FAILED;
1263 dev_dbg(&isci_host->pdev->dev,
1264 "%s: Failing task abort in order to "
1265 "escalate to target reset because\n"
1266 "SAS_TASK_NEED_DEV_RESET is set for "
1267 "task %p on dev %p\n",
1268 __func__, task, isci_device);
1272 /* The request has already completed and there
1273 * is nothing to do here other than to set the task
1274 * done bit, and indicate that the task abort function
1277 isci_set_task_doneflags(task);
1279 spin_unlock_irqrestore(&task->task_state_lock, flags);
1281 ret = TMF_RESP_FUNC_COMPLETE;
1283 dev_dbg(&isci_host->pdev->dev,
1284 "%s: abort task not needed for %p\n",
1291 spin_unlock_irqrestore(&task->task_state_lock, flags);
1293 spin_lock_irqsave(&isci_host->scic_lock, flags);
1295 /* Check the request status and change to "aborted" if currently
1296 * "starting"; if true then set the I/O kernel completion
1297 * struct that will be triggered when the request completes.
1299 old_state = isci_task_validate_request_to_abort(
1300 old_request, isci_host, isci_device,
1301 &aborted_io_completion);
1302 if ((old_state != started) &&
1303 (old_state != completed) &&
1304 (old_state != aborting)) {
1306 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
1308 /* The request was already being handled by someone else (because
1309 * they got to set the state away from started).
1311 dev_dbg(&isci_host->pdev->dev,
1312 "%s: device = %p; old_request %p already being aborted\n",
1314 isci_device, old_request);
1316 return TMF_RESP_FUNC_COMPLETE;
1318 if ((task->task_proto == SAS_PROTOCOL_SMP)
1320 || old_request->complete_in_target
1323 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
1325 dev_dbg(&isci_host->pdev->dev,
1326 "%s: SMP request (%d)"
1327 " or device is stopping (%d)"
1328 " or complete_in_target (%d), thus no TMF\n",
1329 __func__, (task->task_proto == SAS_PROTOCOL_SMP),
1330 device_stopping, old_request->complete_in_target);
1332 /* Set the state on the task. */
1333 isci_task_all_done(task);
1335 ret = TMF_RESP_FUNC_COMPLETE;
1337 /* Stopping and SMP devices are not sent a TMF, and are not
1338 * reset, but the outstanding I/O request is terminated below.
1341 /* Fill in the tmf stucture */
1342 isci_task_build_abort_task_tmf(&tmf, isci_device,
1343 isci_tmf_ssp_task_abort,
1344 isci_abort_task_process_cb,
1347 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
1349 #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */
1350 ret = isci_task_execute_tmf(isci_host, &tmf,
1351 ISCI_ABORT_TASK_TIMEOUT_MS);
1353 if (ret != TMF_RESP_FUNC_COMPLETE)
1354 dev_err(&isci_host->pdev->dev,
1355 "%s: isci_task_send_tmf failed\n",
1358 if (ret == TMF_RESP_FUNC_COMPLETE) {
1359 old_request->complete_in_target = true;
1361 /* Clean up the request on our side, and wait for the aborted I/O to
1364 isci_terminate_request_core(isci_host, isci_device, old_request);
1367 /* Make sure we do not leave a reference to aborted_io_completion */
1368 old_request->io_request_completion = NULL;
1373 * isci_task_abort_task_set() - This function is one of the SAS Domain Template
1374 * functions. This is one of the Task Management functoins called by libsas,
1375 * to abort all task for the given lun.
1376 * @d_device: This parameter specifies the domain device associated with this
1378 * @lun: This parameter specifies the lun associated with this request.
1380 * status, zero indicates success.
1382 int isci_task_abort_task_set(
1383 struct domain_device *d_device,
1386 return TMF_RESP_FUNC_FAILED;
1391 * isci_task_clear_aca() - This function is one of the SAS Domain Template
1392 * functions. This is one of the Task Management functoins called by libsas.
1393 * @d_device: This parameter specifies the domain device associated with this
1395 * @lun: This parameter specifies the lun associated with this request.
1397 * status, zero indicates success.
1399 int isci_task_clear_aca(
1400 struct domain_device *d_device,
1403 return TMF_RESP_FUNC_FAILED;
1409 * isci_task_clear_task_set() - This function is one of the SAS Domain Template
1410 * functions. This is one of the Task Management functoins called by libsas.
1411 * @d_device: This parameter specifies the domain device associated with this
1413 * @lun: This parameter specifies the lun associated with this request.
1415 * status, zero indicates success.
1417 int isci_task_clear_task_set(
1418 struct domain_device *d_device,
1421 return TMF_RESP_FUNC_FAILED;
1426 * isci_task_query_task() - This function is implemented to cause libsas to
1427 * correctly escalate the failed abort to a LUN or target reset (this is
1428 * because sas_scsi_find_task libsas function does not correctly interpret
1429 * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is
1430 * returned, libsas turns this into a LUN reset; when FUNC_FAILED is
1431 * returned, libsas will turn this into a target reset
1432 * @task: This parameter specifies the sas task being queried.
1433 * @lun: This parameter specifies the lun associated with this request.
1435 * status, zero indicates success.
1437 int isci_task_query_task(
1438 struct sas_task *task)
1440 /* See if there is a pending device reset for this device. */
1441 if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET)
1442 return TMF_RESP_FUNC_FAILED;
1444 return TMF_RESP_FUNC_SUCC;
1448 * isci_task_request_complete() - This function is called by the sci core when
1449 * an task request completes.
1450 * @isci_host: This parameter specifies the ISCI host object
1451 * @request: This parameter is the completed isci_request object.
1452 * @completion_status: This parameter specifies the completion status from the
1457 void isci_task_request_complete(
1458 struct isci_host *isci_host,
1459 struct isci_request *request,
1460 enum sci_task_status completion_status)
1462 struct isci_remote_device *isci_device = request->isci_device;
1463 enum isci_request_status old_state;
1464 struct isci_tmf *tmf = isci_request_access_tmf(request);
1465 struct completion *tmf_complete;
1467 dev_dbg(&isci_host->pdev->dev,
1468 "%s: request = %p, status=%d\n",
1469 __func__, request, completion_status);
1471 old_state = isci_request_change_state(request, completed);
1473 tmf->status = completion_status;
1474 request->complete_in_target = true;
1476 if (SAS_PROTOCOL_SSP == tmf->proto) {
1478 memcpy(&tmf->resp.resp_iu,
1479 scic_io_request_get_response_iu_address(
1480 request->sci_request_handle
1482 sizeof(struct sci_ssp_response_iu));
1484 } else if (SAS_PROTOCOL_SATA == tmf->proto) {
1486 memcpy(&tmf->resp.d2h_fis,
1487 scic_stp_io_request_get_d2h_reg_address(
1488 request->sci_request_handle
1490 sizeof(struct sata_fis_reg_d2h)
1494 /* Manage the timer if it is still running. */
1495 if (tmf->timeout_timer) {
1496 isci_del_timer(isci_host, tmf->timeout_timer);
1497 tmf->timeout_timer = NULL;
1500 /* PRINT_TMF( ((struct isci_tmf *)request->task)); */
1501 tmf_complete = tmf->complete;
1503 scic_controller_complete_task(
1504 isci_host->core_controller,
1505 to_sci_dev(isci_device),
1506 request->sci_request_handle
1508 /* NULL the request handle to make sure it cannot be terminated
1509 * or completed again.
1511 request->sci_request_handle = NULL;
1513 isci_request_change_state(request, unallocated);
1514 list_del_init(&request->dev_node);
1516 /* The task management part completes last. */
1517 complete(tmf_complete);
1522 * isci_task_ssp_request_get_lun() - This function is called by the sci core to
1523 * retrieve the lun for a given task request.
1524 * @request: This parameter is the isci_request object.
1526 * lun for specified task request.
1530 * isci_task_ssp_request_get_function() - This function is called by the sci
1531 * core to retrieve the function for a given task request.
1532 * @request: This parameter is the isci_request object.
1534 * function code for specified task request.
1536 u8 isci_task_ssp_request_get_function(struct isci_request *request)
1538 struct isci_tmf *isci_tmf = isci_request_access_tmf(request);
1540 dev_dbg(&request->isci_host->pdev->dev,
1541 "%s: func = %d\n", __func__, isci_tmf->tmf_code);
1543 return isci_tmf->tmf_code;
1547 * isci_task_ssp_request_get_io_tag_to_manage() - This function is called by
1548 * the sci core to retrieve the io tag for a given task request.
1549 * @request: This parameter is the isci_request object.
1551 * io tag for specified task request.
1553 u16 isci_task_ssp_request_get_io_tag_to_manage(struct isci_request *request)
1555 u16 io_tag = SCI_CONTROLLER_INVALID_IO_TAG;
1557 if (tmf_task == request->ttype) {
1558 struct isci_tmf *tmf = isci_request_access_tmf(request);
1559 io_tag = tmf->io_tag;
1562 dev_dbg(&request->isci_host->pdev->dev,
1563 "%s: request = %p, io_tag = %d\n",
1564 __func__, request, io_tag);
1570 * isci_task_ssp_request_get_response_data_address() - This function is called
1571 * by the sci core to retrieve the response data address for a given task
1573 * @request: This parameter is the isci_request object.
1575 * response data address for specified task request.
1577 void *isci_task_ssp_request_get_response_data_address(
1578 struct isci_request *request)
1580 struct isci_tmf *isci_tmf = isci_request_access_tmf(request);
1582 return &isci_tmf->resp.resp_iu;
1586 * isci_task_ssp_request_get_response_data_length() - This function is called
1587 * by the sci core to retrieve the response data length for a given task
1589 * @request: This parameter is the isci_request object.
1591 * response data length for specified task request.
1593 u32 isci_task_ssp_request_get_response_data_length(
1594 struct isci_request *request)
1596 struct isci_tmf *isci_tmf = isci_request_access_tmf(request);
1598 return sizeof(isci_tmf->resp.resp_iu);
1602 * isci_bus_reset_handler() - This function performs a target reset of the
1603 * device referenced by "cmd'. This function is exported through the
1604 * "struct scsi_host_template" structure such that it is called when an I/O
1605 * recovery process has escalated to a target reset. Note that this function
1606 * is called from the scsi error handler event thread, so may block on calls.
1607 * @scsi_cmd: This parameter specifies the target to be reset.
1609 * SUCCESS if the reset process was successful, else FAILED.
1611 int isci_bus_reset_handler(struct scsi_cmnd *cmd)
1613 unsigned long flags = 0;
1614 struct isci_host *isci_host = NULL;
1615 enum sci_status status;
1617 struct isci_remote_device *isci_dev
1618 = isci_dev_from_domain_dev(
1619 sdev_to_domain_dev(cmd->device));
1621 dev_dbg(&cmd->device->sdev_gendev,
1622 "%s: cmd %p, isci_dev %p\n",
1623 __func__, cmd, isci_dev);
1626 dev_warn(&cmd->device->sdev_gendev,
1627 "%s: isci_dev is GONE!\n",
1630 return TMF_RESP_FUNC_COMPLETE; /* Nothing to reset. */
1633 if (isci_dev->isci_port != NULL)
1634 isci_host = isci_dev->isci_port->isci_host;
1636 if (isci_host != NULL)
1637 spin_lock_irqsave(&isci_host->scic_lock, flags);
1639 status = scic_remote_device_reset(to_sci_dev(isci_dev));
1640 if (status != SCI_SUCCESS) {
1642 if (isci_host != NULL)
1643 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
1645 scmd_printk(KERN_WARNING, cmd,
1646 "%s: scic_remote_device_reset(%p) returned %d!\n",
1647 __func__, isci_dev, status);
1649 return TMF_RESP_FUNC_FAILED;
1651 if (isci_host != NULL)
1652 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
1654 /* Make sure all pending requests are able to be fully terminated. */
1655 isci_device_clear_reset_pending(isci_dev);
1657 /* Terminate in-progress I/O now. */
1658 isci_remote_device_nuke_requests(isci_dev);
1660 /* Call into the libsas default handler (which calls sas_phy_reset). */
1661 base_status = sas_eh_bus_reset_handler(cmd);
1663 if (base_status != SUCCESS) {
1665 /* There can be cases where the resets to individual devices
1666 * behind an expander will fail because of an unplug of the
1669 scmd_printk(KERN_WARNING, cmd,
1670 "%s: sas_eh_bus_reset_handler(%p) returned %d!\n",
1671 __func__, cmd, base_status);
1674 /* WHAT TO DO HERE IF sas_phy_reset FAILS? */
1676 if (isci_host != NULL)
1677 spin_lock_irqsave(&isci_host->scic_lock, flags);
1678 status = scic_remote_device_reset_complete(to_sci_dev(isci_dev));
1680 if (isci_host != NULL)
1681 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
1683 if (status != SCI_SUCCESS) {
1684 scmd_printk(KERN_WARNING, cmd,
1685 "%s: scic_remote_device_reset_complete(%p) "
1687 __func__, isci_dev, status);
1689 /* WHAT TO DO HERE IF scic_remote_device_reset_complete FAILS? */
1691 dev_dbg(&cmd->device->sdev_gendev,
1692 "%s: cmd %p, isci_dev %p complete.\n",
1693 __func__, cmd, isci_dev);
1695 return TMF_RESP_FUNC_COMPLETE;