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.
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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
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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
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53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 #include <linux/completion.h>
57 #include "scic_task_request.h"
58 #include "scic_remote_device.h"
59 #include "scic_io_request.h"
60 #include "scic_sds_remote_device.h"
61 #include "scic_sds_remote_node_context.h"
69 * isci_task_execute_task() - This function is one of the SAS Domain Template
70 * functions. This function is called by libsas to send a task down to
72 * @task: This parameter specifies the SAS task to send.
73 * @num: This parameter specifies the number of tasks to queue.
74 * @gfp_flags: This parameter specifies the context of this call.
76 * status, zero indicates success.
78 int isci_task_execute_task(struct sas_task
*task
, int num
, gfp_t gfp_flags
)
80 struct isci_host
*isci_host
;
81 struct isci_request
*request
= NULL
;
82 struct isci_remote_device
*device
;
85 enum sci_status status
;
88 dev_dbg(task
->dev
->port
->ha
->dev
, "%s: num=%d\n", __func__
, num
);
90 if (task
->task_state_flags
& SAS_TASK_STATE_ABORTED
) {
92 isci_task_complete_for_upper_layer(
95 SAM_STAT_TASK_ABORTED
,
96 isci_perform_normal_io_completion
99 return 0; /* The I/O was accepted (and failed). */
101 if ((task
->dev
== NULL
) || (task
->dev
->port
== NULL
)) {
103 /* Indicate SAS_TASK_UNDELIVERED, so that the scsi midlayer
104 * removes the target.
106 isci_task_complete_for_upper_layer(
108 SAS_TASK_UNDELIVERED
,
110 isci_perform_normal_io_completion
112 return 0; /* The I/O was accepted (and failed). */
114 isci_host
= isci_host_from_sas_ha(task
->dev
->port
->ha
);
116 /* Check if we have room for more tasks */
117 ret
= isci_host_can_queue(isci_host
, num
);
120 dev_warn(task
->dev
->port
->ha
->dev
, "%s: queue full\n", __func__
);
125 dev_dbg(task
->dev
->port
->ha
->dev
,
126 "task = %p, num = %d; dev = %p; cmd = %p\n",
127 task
, num
, task
->dev
, task
->uldd_task
);
129 if ((task
->dev
== NULL
) || (task
->dev
->port
== NULL
)) {
130 dev_warn(task
->dev
->port
->ha
->dev
,
131 "%s: task %p's port or dev == NULL!\n",
134 /* Indicate SAS_TASK_UNDELIVERED, so that the scsi
135 * midlayer removes the target.
137 isci_task_complete_for_upper_layer(
139 SAS_TASK_UNDELIVERED
,
141 isci_perform_normal_io_completion
143 /* We don't have a valid host reference, so we
144 * can't control the host queueing condition.
149 device
= isci_dev_from_domain_dev(task
->dev
);
151 isci_host
= isci_host_from_sas_ha(task
->dev
->port
->ha
);
153 if (device
&& device
->status
== isci_ready
) {
155 /* Forces a retry from scsi mid layer. */
156 dev_warn(task
->dev
->port
->ha
->dev
,
157 "%s: task %p: isci_host->status = %d, "
161 isci_host_get_state(isci_host
),
165 dev_dbg(task
->dev
->port
->ha
->dev
,
166 "%s: device->status = 0x%x\n",
167 __func__
, device
->status
);
169 /* Indicate QUEUE_FULL so that the scsi midlayer
172 isci_task_complete_for_upper_layer(
176 isci_perform_normal_io_completion
178 isci_host_can_dequeue(isci_host
, 1);
180 /* the device is going down... */
181 else if (!device
|| device
->status
!= isci_ready_for_io
) {
183 dev_dbg(task
->dev
->port
->ha
->dev
,
184 "%s: task %p: isci_host->status = %d, "
188 isci_host_get_state(isci_host
),
192 dev_dbg(task
->dev
->port
->ha
->dev
,
193 "%s: device->status = 0x%x\n",
194 __func__
, device
->status
);
196 /* Indicate SAS_TASK_UNDELIVERED, so that the scsi
197 * midlayer removes the target.
199 isci_task_complete_for_upper_layer(
201 SAS_TASK_UNDELIVERED
,
203 isci_perform_normal_io_completion
205 isci_host_can_dequeue(isci_host
, 1);
208 /* build and send the request. */
209 status
= isci_request_execute(isci_host
, task
, &request
,
212 if (status
== SCI_SUCCESS
) {
213 spin_lock_irqsave(&task
->task_state_lock
, flags
);
214 task
->task_state_flags
|= SAS_TASK_AT_INITIATOR
;
215 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
217 /* Indicate QUEUE_FULL so that the scsi
218 * midlayer retries. if the request
219 * failed for remote device reasons,
220 * it gets returned as
221 * SAS_TASK_UNDELIVERED next time
224 isci_task_complete_for_upper_layer(
228 isci_perform_normal_io_completion
230 isci_host_can_dequeue(isci_host
, 1);
233 task
= list_entry(task
->list
.next
, struct sas_task
, list
);
241 * isci_task_request_build() - This function builds the task request object.
242 * @isci_host: This parameter specifies the ISCI host object
243 * @request: This parameter points to the isci_request object allocated in the
244 * request construct function.
245 * @tmf: This parameter is the task management struct to be built
247 * SCI_SUCCESS on successfull completion, or specific failure code.
249 static enum sci_status
isci_task_request_build(
250 struct isci_host
*isci_host
,
251 struct isci_request
**isci_request
,
252 struct isci_tmf
*isci_tmf
)
254 struct scic_sds_remote_device
*sci_device
;
255 enum sci_status status
= SCI_FAILURE
;
256 struct isci_request
*request
;
257 struct isci_remote_device
*isci_device
;
258 /* struct sci_sas_identify_address_frame_protocols dev_protocols; */
259 struct smp_discover_response_protocols dev_protocols
;
262 dev_dbg(&isci_host
->pdev
->dev
,
263 "%s: isci_tmf = %p\n", __func__
, isci_tmf
);
265 isci_device
= isci_tmf
->device
;
266 sci_device
= to_sci_dev(isci_device
);
268 /* do common allocation and init of request object. */
269 status
= isci_request_alloc_tmf(
277 if (status
!= SCI_SUCCESS
)
280 /* let the core do it's construct. */
281 status
= scic_task_request_construct(
282 isci_host
->core_controller
,
284 SCI_CONTROLLER_INVALID_IO_TAG
,
286 request
->sci_request_mem_ptr
,
287 &request
->sci_request_handle
290 if (status
!= SCI_SUCCESS
) {
291 dev_warn(&isci_host
->pdev
->dev
,
292 "%s: scic_task_request_construct failed - "
299 sci_object_set_association(
300 request
->sci_request_handle
,
304 scic_remote_device_get_protocols(
309 /* let the core do it's protocol
310 * specific construction.
312 if (dev_protocols
.u
.bits
.attached_ssp_target
) {
314 isci_tmf
->proto
= SAS_PROTOCOL_SSP
;
315 status
= scic_task_request_construct_ssp(
316 request
->sci_request_handle
318 if (status
!= SCI_SUCCESS
)
322 if (dev_protocols
.u
.bits
.attached_stp_target
) {
324 isci_tmf
->proto
= SAS_PROTOCOL_SATA
;
325 status
= isci_sata_management_task_request_build(request
);
327 if (status
!= SCI_SUCCESS
)
335 /* release the dma memory if we fail. */
336 isci_request_free(isci_host
, request
);
340 *isci_request
= request
;
345 * isci_tmf_timeout_cb() - This function is called as a kernel callback when
346 * the timeout period for the TMF has expired.
350 static void isci_tmf_timeout_cb(void *tmf_request_arg
)
352 struct isci_request
*request
= (struct isci_request
*)tmf_request_arg
;
353 struct isci_tmf
*tmf
= isci_request_access_tmf(request
);
354 enum sci_status status
;
356 BUG_ON(request
->ttype
!= tmf_task
);
358 /* This task management request has timed-out. Terminate the request
359 * so that the request eventually completes to the requestor in the
360 * request completion callback path.
362 /* Note - the timer callback function itself has provided spinlock
363 * exclusion from the start and completion paths. No need to take
364 * the request->isci_host->scic_lock here.
367 if (tmf
->timeout_timer
!= NULL
) {
368 /* Call the users callback, if any. */
369 if (tmf
->cb_state_func
!= NULL
)
370 tmf
->cb_state_func(isci_tmf_timed_out
, tmf
,
373 /* Terminate the TMF transmit request. */
374 status
= scic_controller_terminate_request(
375 request
->isci_host
->core_controller
,
376 to_sci_dev(request
->isci_device
),
377 request
->sci_request_handle
380 dev_dbg(&request
->isci_host
->pdev
->dev
,
381 "%s: tmf_request = %p; tmf = %p; status = %d\n",
382 __func__
, request
, tmf
, status
);
384 dev_dbg(&request
->isci_host
->pdev
->dev
,
385 "%s: timer already canceled! "
386 "tmf_request = %p; tmf = %p\n",
387 __func__
, request
, tmf
);
389 /* No need to unlock since the caller to this callback is doing it for
391 * request->isci_host->scic_lock
396 * isci_task_execute_tmf() - This function builds and sends a task request,
397 * then waits for the completion.
398 * @isci_host: This parameter specifies the ISCI host object
399 * @tmf: This parameter is the pointer to the task management structure for
401 * @timeout_ms: This parameter specifies the timeout period for the task
402 * management request.
404 * TMF_RESP_FUNC_COMPLETE on successful completion of the TMF (this includes
405 * error conditions reported in the IU status), or TMF_RESP_FUNC_FAILED.
407 int isci_task_execute_tmf(
408 struct isci_host
*isci_host
,
409 struct isci_tmf
*tmf
,
410 unsigned long timeout_ms
)
412 DECLARE_COMPLETION_ONSTACK(completion
);
413 enum sci_status status
= SCI_FAILURE
;
414 struct scic_sds_remote_device
*sci_device
;
415 struct isci_remote_device
*isci_device
= tmf
->device
;
416 struct isci_request
*request
;
417 int ret
= TMF_RESP_FUNC_FAILED
;
420 /* sanity check, return TMF_RESP_FUNC_FAILED
421 * if the device is not there and ready.
423 if (!isci_device
|| isci_device
->status
!= isci_ready_for_io
) {
424 dev_dbg(&isci_host
->pdev
->dev
,
425 "%s: isci_device = %p not ready (%d)\n",
427 isci_device
, isci_device
->status
);
428 return TMF_RESP_FUNC_FAILED
;
430 dev_dbg(&isci_host
->pdev
->dev
,
431 "%s: isci_device = %p\n",
432 __func__
, isci_device
);
434 sci_device
= to_sci_dev(isci_device
);
436 /* Assign the pointer to the TMF's completion kernel wait structure. */
437 tmf
->complete
= &completion
;
439 isci_task_request_build(
446 dev_warn(&isci_host
->pdev
->dev
,
447 "%s: isci_task_request_build failed\n",
449 return TMF_RESP_FUNC_FAILED
;
452 /* Allocate the TMF timeout timer. */
453 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
454 tmf
->timeout_timer
= isci_timer_create(isci_host
, request
, isci_tmf_timeout_cb
);
456 /* Start the timer. */
457 if (tmf
->timeout_timer
)
458 isci_timer_start(tmf
->timeout_timer
, timeout_ms
);
460 dev_warn(&isci_host
->pdev
->dev
,
461 "%s: isci_timer_create failed!!!!\n",
464 /* start the TMF io. */
465 status
= scic_controller_start_task(
466 isci_host
->core_controller
,
468 request
->sci_request_handle
,
469 SCI_CONTROLLER_INVALID_IO_TAG
472 if (status
!= SCI_SUCCESS
) {
473 dev_warn(&isci_host
->pdev
->dev
,
474 "%s: start_io failed - status = 0x%x, request = %p\n",
478 goto cleanup_request
;
481 /* Call the users callback, if any. */
482 if (tmf
->cb_state_func
!= NULL
)
483 tmf
->cb_state_func(isci_tmf_started
, tmf
, tmf
->cb_data
);
485 /* Change the state of the TMF-bearing request to "started". */
486 isci_request_change_state(request
, started
);
488 /* add the request to the remote device request list. */
489 list_add(&request
->dev_node
, &isci_device
->reqs_in_process
);
491 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
493 /* Wait for the TMF to complete, or a timeout. */
494 wait_for_completion(&completion
);
498 if (tmf
->status
== SCI_SUCCESS
)
499 ret
= TMF_RESP_FUNC_COMPLETE
;
500 else if (tmf
->status
== SCI_FAILURE_IO_RESPONSE_VALID
) {
501 dev_dbg(&isci_host
->pdev
->dev
,
503 "SCI_FAILURE_IO_RESPONSE_VALID\n",
505 ret
= TMF_RESP_FUNC_COMPLETE
;
507 /* Else - leave the default "failed" status alone. */
509 dev_dbg(&isci_host
->pdev
->dev
,
510 "%s: completed request = %p\n",
514 if (request
->io_request_completion
!= NULL
) {
516 /* The fact that this is non-NULL for a TMF request
517 * means there is a thread waiting for this TMF to
520 complete(request
->io_request_completion
);
523 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
527 /* Clean up the timer if needed. */
528 if (tmf
->timeout_timer
) {
529 isci_del_timer(isci_host
, tmf
->timeout_timer
);
530 tmf
->timeout_timer
= NULL
;
533 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
535 isci_request_free(isci_host
, request
);
540 void isci_task_build_tmf(
541 struct isci_tmf
*tmf
,
542 struct isci_remote_device
*isci_device
,
543 enum isci_tmf_function_codes code
,
544 void (*tmf_sent_cb
)(enum isci_tmf_cb_state
,
547 struct isci_request
*old_request
)
549 dev_dbg(&isci_device
->isci_port
->isci_host
->pdev
->dev
,
550 "%s: isci_device = %p\n", __func__
, isci_device
);
552 memset(tmf
, 0, sizeof(*tmf
));
554 tmf
->device
= isci_device
;
555 tmf
->tmf_code
= code
;
556 tmf
->timeout_timer
= NULL
;
557 tmf
->cb_state_func
= tmf_sent_cb
;
558 tmf
->cb_data
= old_request
;
559 tmf
->io_tag
= old_request
->io_tag
;
563 static struct isci_request
*isci_task_get_request_from_task(
564 struct sas_task
*task
,
565 struct isci_host
**isci_host
,
566 struct isci_remote_device
**isci_device
)
569 struct isci_request
*request
= NULL
;
572 spin_lock_irqsave(&task
->task_state_lock
, flags
);
574 request
= task
->lldd_task
;
576 /* If task is already done, the request isn't valid */
577 if (!(task
->task_state_flags
& SAS_TASK_STATE_DONE
) &&
578 (task
->task_state_flags
& SAS_TASK_AT_INITIATOR
) &&
581 if (isci_host
!= NULL
)
582 *isci_host
= request
->isci_host
;
584 if (isci_device
!= NULL
)
585 *isci_device
= request
->isci_device
;
588 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
594 * isci_task_validate_request_to_abort() - This function checks the given I/O
595 * against the "started" state. If the request is still "started", it's
596 * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD
597 * BEFORE CALLING THIS FUNCTION.
598 * @isci_request: This parameter specifies the request object to control.
599 * @isci_host: This parameter specifies the ISCI host object
600 * @isci_device: This is the device to which the request is pending.
601 * @aborted_io_completion: This is a completion structure that will be added to
602 * the request in case it is changed to aborting; this completion is
603 * triggered when the request is fully completed.
605 * Either "started" on successful change of the task status to "aborted", or
606 * "unallocated" if the task cannot be controlled.
608 static enum isci_request_status
isci_task_validate_request_to_abort(
609 struct isci_request
*isci_request
,
610 struct isci_host
*isci_host
,
611 struct isci_remote_device
*isci_device
,
612 struct completion
*aborted_io_completion
)
614 enum isci_request_status old_state
= unallocated
;
616 /* Only abort the task if it's in the
617 * device's request_in_process list
619 if (isci_request
&& !list_empty(&isci_request
->dev_node
)) {
620 old_state
= isci_request_change_started_to_aborted(
621 isci_request
, aborted_io_completion
);
628 static void isci_request_cleanup_completed_loiterer(
629 struct isci_host
*isci_host
,
630 struct isci_remote_device
*isci_device
,
631 struct isci_request
*isci_request
)
633 struct sas_task
*task
;
636 task
= (isci_request
->ttype
== io_task
)
637 ? isci_request_access_task(isci_request
)
640 dev_dbg(&isci_host
->pdev
->dev
,
641 "%s: isci_device=%p, request=%p, task=%p\n",
642 __func__
, isci_device
, isci_request
, task
);
644 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
645 list_del_init(&isci_request
->dev_node
);
646 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
650 spin_lock_irqsave(&task
->task_state_lock
, flags
);
651 task
->lldd_task
= NULL
;
653 isci_set_task_doneflags(task
);
655 /* If this task is not in the abort path, call task_done. */
656 if (!(task
->task_state_flags
& SAS_TASK_STATE_ABORTED
)) {
658 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
659 task
->task_done(task
);
661 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
663 isci_request_free(isci_host
, isci_request
);
666 * isci_terminate_request_core() - This function will terminate the given
667 * request, and wait for it to complete. This function must only be called
668 * from a thread that can wait. Note that the request is terminated and
669 * completed (back to the host, if started there).
670 * @isci_host: This SCU.
671 * @isci_device: The target.
672 * @isci_request: The I/O request to be terminated.
676 static void isci_terminate_request_core(
677 struct isci_host
*isci_host
,
678 struct isci_remote_device
*isci_device
,
679 struct isci_request
*isci_request
,
680 struct completion
*request_completion
)
682 enum sci_status status
= SCI_SUCCESS
;
683 bool was_terminated
= false;
684 bool needs_cleanup_handling
= false;
685 enum isci_request_status request_status
;
688 dev_dbg(&isci_host
->pdev
->dev
,
689 "%s: device = %p; request = %p\n",
690 __func__
, isci_device
, isci_request
);
692 /* Peek at the current status of the request. This will tell
693 * us if there was special handling on the request such that it
694 * needs to be detached and freed here.
696 spin_lock_irqsave(&isci_request
->state_lock
, flags
);
697 request_status
= isci_request_get_state(isci_request
);
699 if ((isci_request
->ttype
== io_task
) /* TMFs are in their own thread */
700 && ((request_status
== aborted
)
701 || (request_status
== aborting
)
702 || (request_status
== terminating
)
703 || (request_status
== completed
)
707 /* The completion routine won't free a request in
708 * the aborted/aborting/terminating state, so we do
711 needs_cleanup_handling
= true;
713 spin_unlock_irqrestore(&isci_request
->state_lock
, flags
);
715 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
716 /* Make sure the request wasn't just sitting around signalling
717 * device condition (if the request handle is NULL, then the
718 * request completed but needed additional handling here).
720 if (isci_request
->sci_request_handle
!= NULL
) {
721 was_terminated
= true;
722 status
= scic_controller_terminate_request(
723 isci_host
->core_controller
,
724 to_sci_dev(isci_device
),
725 isci_request
->sci_request_handle
728 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
731 * The only time the request to terminate will
732 * fail is when the io request is completed and
735 if (status
!= SCI_SUCCESS
)
736 dev_err(&isci_host
->pdev
->dev
,
737 "%s: scic_controller_terminate_request"
738 " returned = 0x%x\n",
742 if (was_terminated
) {
743 dev_dbg(&isci_host
->pdev
->dev
,
744 "%s: before completion wait (%p)\n",
748 /* Wait here for the request to complete. */
749 wait_for_completion(request_completion
);
751 dev_dbg(&isci_host
->pdev
->dev
,
752 "%s: after completion wait (%p)\n",
757 if (needs_cleanup_handling
)
758 isci_request_cleanup_completed_loiterer(
759 isci_host
, isci_device
, isci_request
763 static void isci_terminate_request(
764 struct isci_host
*isci_host
,
765 struct isci_remote_device
*isci_device
,
766 struct isci_request
*isci_request
,
767 enum isci_request_status new_request_state
)
769 enum isci_request_status old_state
;
771 DECLARE_COMPLETION_ONSTACK(request_completion
);
774 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
776 /* Change state to "new_request_state" if it is currently "started" */
777 old_state
= isci_request_change_started_to_newstate(
783 if ((old_state
== started
) || (old_state
== completed
)) {
785 /* If the old_state is started:
786 * This request was not already being aborted. If it had been,
787 * then the aborting I/O (ie. the TMF request) would not be in
788 * the aborting state, and thus would be terminated here. Note
789 * that since the TMF completion's call to the kernel function
790 * "complete()" does not happen until the pending I/O request
791 * terminate fully completes, we do not have to implement a
792 * special wait here for already aborting requests - the
793 * termination of the TMF request will force the request
794 * to finish it's already started terminate.
796 * If old_state == completed:
797 * This request completed from the SCU hardware perspective
798 * and now just needs cleaning up in terms of freeing the
799 * request and potentially calling up to libsas.
801 isci_terminate_request_core(isci_host
, isci_device
,
802 isci_request
, &request_completion
);
807 * isci_terminate_pending_requests() - This function will change the all of the
808 * requests on the given device's state to "aborting", will terminate the
809 * requests, and wait for them to complete. This function must only be
810 * called from a thread that can wait. Note that the requests are all
811 * terminated and completed (back to the host, if started there).
812 * @isci_host: This parameter specifies SCU.
813 * @isci_device: This parameter specifies the target.
817 void isci_terminate_pending_requests(
818 struct isci_host
*isci_host
,
819 struct isci_remote_device
*isci_device
,
820 enum isci_request_status new_request_state
)
822 struct isci_request
*isci_request
;
823 struct sas_task
*task
;
827 dev_dbg(&isci_host
->pdev
->dev
,
828 "%s: isci_device = %p (new request state = %d)\n",
829 __func__
, isci_device
, new_request_state
);
831 #define ISCI_TERMINATE_SHOW_PENDING_REQUESTS
832 #ifdef ISCI_TERMINATE_SHOW_PENDING_REQUESTS
834 struct isci_request
*request
;
836 /* Only abort the task if it's in the
837 * device's request_in_process list
839 list_for_each_entry(request
,
840 &isci_device
->reqs_in_process
,
842 dev_dbg(&isci_host
->pdev
->dev
,
843 "%s: isci_device = %p; request is on "
844 "reqs_in_process list: %p\n",
845 __func__
, isci_device
, request
);
847 #endif /* ISCI_TERMINATE_SHOW_PENDING_REQUESTS */
849 /* Clean up all pending requests. */
851 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
853 if (list_empty(&isci_device
->reqs_in_process
)) {
856 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
858 dev_dbg(&isci_host
->pdev
->dev
,
859 "%s: isci_device = %p; done.\n",
860 __func__
, isci_device
);
862 /* The list was not empty - grab the first request. */
863 isci_request
= list_first_entry(
864 &isci_device
->reqs_in_process
,
865 struct isci_request
, dev_node
867 /* Note that we are not expecting to have to control
868 * the target to abort the request.
870 isci_request
->complete_in_target
= true;
872 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
874 /* Get the libsas task reference. */
875 task
= isci_request_access_task(isci_request
);
877 dev_dbg(&isci_host
->pdev
->dev
,
878 "%s: isci_device=%p request=%p; task=%p\n",
879 __func__
, isci_device
, isci_request
, task
);
881 /* Mark all still pending I/O with the selected next
884 isci_terminate_request(isci_host
, isci_device
,
885 isci_request
, new_request_state
892 * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain
893 * Template functions.
894 * @lun: This parameter specifies the lun to be reset.
896 * status, zero indicates success.
898 static int isci_task_send_lu_reset_sas(
899 struct isci_host
*isci_host
,
900 struct isci_remote_device
*isci_device
,
904 int ret
= TMF_RESP_FUNC_FAILED
;
906 dev_dbg(&isci_host
->pdev
->dev
,
907 "%s: isci_host = %p, isci_device = %p\n",
908 __func__
, isci_host
, isci_device
);
909 /* Send the LUN reset to the target. By the time the call returns,
910 * the TMF has fully exected in the target (in which case the return
911 * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or
912 * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED").
914 isci_task_build_tmf(&tmf
, isci_device
, isci_tmf_ssp_lun_reset
, NULL
,
917 #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */
918 ret
= isci_task_execute_tmf(isci_host
, &tmf
, ISCI_LU_RESET_TIMEOUT_MS
);
920 if (ret
== TMF_RESP_FUNC_COMPLETE
)
921 dev_dbg(&isci_host
->pdev
->dev
,
922 "%s: %p: TMF_LU_RESET passed\n",
923 __func__
, isci_device
);
925 dev_dbg(&isci_host
->pdev
->dev
,
926 "%s: %p: TMF_LU_RESET failed (%x)\n",
927 __func__
, isci_device
, ret
);
933 * isci_task_lu_reset() - This function is one of the SAS Domain Template
934 * functions. This is one of the Task Management functoins called by libsas,
935 * to reset the given lun. Note the assumption that while this call is
936 * executing, no I/O will be sent by the host to the device.
937 * @lun: This parameter specifies the lun to be reset.
939 * status, zero indicates success.
941 int isci_task_lu_reset(
942 struct domain_device
*domain_device
,
945 struct isci_host
*isci_host
= NULL
;
946 struct isci_remote_device
*isci_device
= NULL
;
948 bool device_stopping
= false;
950 if (domain_device
== NULL
) {
951 pr_warn("%s: domain_device == NULL\n", __func__
);
952 return TMF_RESP_FUNC_FAILED
;
955 isci_device
= isci_dev_from_domain_dev(domain_device
);
957 if (domain_device
->port
!= NULL
)
958 isci_host
= isci_host_from_sas_ha(domain_device
->port
->ha
);
960 pr_debug("%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
961 __func__
, domain_device
, isci_host
, isci_device
);
963 if (isci_device
!= NULL
)
964 device_stopping
= (isci_device
->status
== isci_stopping
)
965 || (isci_device
->status
== isci_stopped
);
967 /* If there is a device reset pending on any request in the
968 * device's list, fail this LUN reset request in order to
969 * escalate to the device reset.
971 if ((isci_device
== NULL
) ||
972 (isci_host
== NULL
) ||
973 ((isci_host
!= NULL
) &&
974 (isci_device
!= NULL
) &&
976 (isci_device_is_reset_pending(isci_host
, isci_device
))))) {
977 dev_warn(&isci_host
->pdev
->dev
,
978 "%s: No dev (%p), no host (%p), or "
979 "RESET PENDING: domain_device=%p\n",
980 __func__
, isci_device
, isci_host
, domain_device
);
981 return TMF_RESP_FUNC_FAILED
;
984 /* Send the task management part of the reset. */
985 if (sas_protocol_ata(domain_device
->tproto
)) {
986 ret
= isci_task_send_lu_reset_sata(
987 isci_host
, isci_device
, lun
990 ret
= isci_task_send_lu_reset_sas(isci_host
, isci_device
, lun
);
992 /* If the LUN reset worked, all the I/O can now be terminated. */
993 if (ret
== TMF_RESP_FUNC_COMPLETE
)
994 /* Terminate all I/O now. */
995 isci_terminate_pending_requests(isci_host
,
1003 /* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */
1004 int isci_task_clear_nexus_port(struct asd_sas_port
*port
)
1006 return TMF_RESP_FUNC_FAILED
;
1011 int isci_task_clear_nexus_ha(struct sas_ha_struct
*ha
)
1013 return TMF_RESP_FUNC_FAILED
;
1016 int isci_task_I_T_nexus_reset(struct domain_device
*dev
)
1018 return TMF_RESP_FUNC_FAILED
;
1022 /* Task Management Functions. Must be called from process context. */
1025 * isci_abort_task_process_cb() - This is a helper function for the abort task
1026 * TMF command. It manages the request state with respect to the successful
1027 * transmission / completion of the abort task request.
1028 * @cb_state: This parameter specifies when this function was called - after
1029 * the TMF request has been started and after it has timed-out.
1030 * @tmf: This parameter specifies the TMF in progress.
1034 static void isci_abort_task_process_cb(
1035 enum isci_tmf_cb_state cb_state
,
1036 struct isci_tmf
*tmf
,
1039 struct isci_request
*old_request
;
1041 old_request
= (struct isci_request
*)cb_data
;
1043 dev_dbg(&old_request
->isci_host
->pdev
->dev
,
1044 "%s: tmf=%p, old_request=%p\n",
1045 __func__
, tmf
, old_request
);
1049 case isci_tmf_started
:
1050 /* The TMF has been started. Nothing to do here, since the
1051 * request state was already set to "aborted" by the abort
1054 BUG_ON(old_request
->status
!= aborted
);
1057 case isci_tmf_timed_out
:
1059 /* Set the task's state to "aborting", since the abort task
1060 * function thread set it to "aborted" (above) in anticipation
1061 * of the task management request working correctly. Since the
1062 * timeout has now fired, the TMF request failed. We set the
1063 * state such that the request completion will indicate the
1064 * device is no longer present.
1066 isci_request_change_state(old_request
, aborting
);
1070 dev_err(&old_request
->isci_host
->pdev
->dev
,
1071 "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n",
1072 __func__
, cb_state
, tmf
, old_request
);
1078 * isci_task_abort_task() - This function is one of the SAS Domain Template
1079 * functions. This function is called by libsas to abort a specified task.
1080 * @task: This parameter specifies the SAS task to abort.
1082 * status, zero indicates success.
1084 int isci_task_abort_task(struct sas_task
*task
)
1086 DECLARE_COMPLETION_ONSTACK(aborted_io_completion
);
1087 struct isci_request
*old_request
= NULL
;
1088 enum isci_request_status old_state
;
1089 struct isci_remote_device
*isci_device
= NULL
;
1090 struct isci_host
*isci_host
= NULL
;
1091 struct isci_tmf tmf
;
1092 int ret
= TMF_RESP_FUNC_FAILED
;
1093 unsigned long flags
;
1094 bool any_dev_reset
= false;
1095 bool device_stopping
;
1097 /* Get the isci_request reference from the task. Note that
1098 * this check does not depend on the pending request list
1099 * in the device, because tasks driving resets may land here
1100 * after completion in the core.
1102 old_request
= isci_task_get_request_from_task(task
, &isci_host
,
1105 dev_dbg(&isci_host
->pdev
->dev
,
1106 "%s: task = %p\n", __func__
, task
);
1108 /* Check if the device has been / is currently being removed.
1109 * If so, no task management will be done, and the I/O will
1112 device_stopping
= (isci_device
->status
== isci_stopping
)
1113 || (isci_device
->status
== isci_stopped
);
1115 /* This version of the driver will fail abort requests for
1116 * SATA/STP. Failing the abort request this way will cause the
1117 * SCSI error handler thread to escalate to LUN reset
1119 if (sas_protocol_ata(task
->task_proto
) && !device_stopping
) {
1120 dev_warn(&isci_host
->pdev
->dev
,
1121 " task %p is for a STP/SATA device;"
1122 " returning TMF_RESP_FUNC_FAILED\n"
1123 " to cause a LUN reset...\n", task
);
1124 return TMF_RESP_FUNC_FAILED
;
1127 dev_dbg(&isci_host
->pdev
->dev
,
1128 "%s: old_request == %p\n", __func__
, old_request
);
1130 if (!device_stopping
)
1131 any_dev_reset
= isci_device_is_reset_pending(isci_host
,isci_device
);
1133 spin_lock_irqsave(&task
->task_state_lock
, flags
);
1135 /* Don't do resets to stopping devices. */
1136 if (device_stopping
) {
1138 task
->task_state_flags
&= ~SAS_TASK_NEED_DEV_RESET
;
1139 any_dev_reset
= false;
1141 } else /* See if there is a pending device reset for this device. */
1142 any_dev_reset
= any_dev_reset
1143 || (task
->task_state_flags
& SAS_TASK_NEED_DEV_RESET
);
1145 /* If the extraction of the request reference from the task
1146 * failed, then the request has been completed (or if there is a
1147 * pending reset then this abort request function must be failed
1148 * in order to escalate to the target reset).
1150 if ((old_request
== NULL
) || any_dev_reset
) {
1152 /* If the device reset task flag is set, fail the task
1153 * management request. Otherwise, the original request
1156 if (any_dev_reset
) {
1158 /* Turn off the task's DONE to make sure this
1159 * task is escalated to a target reset.
1161 task
->task_state_flags
&= ~SAS_TASK_STATE_DONE
;
1163 /* Make the reset happen as soon as possible. */
1164 task
->task_state_flags
|= SAS_TASK_NEED_DEV_RESET
;
1166 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
1168 /* Fail the task management request in order to
1169 * escalate to the target reset.
1171 ret
= TMF_RESP_FUNC_FAILED
;
1173 dev_dbg(&isci_host
->pdev
->dev
,
1174 "%s: Failing task abort in order to "
1175 "escalate to target reset because\n"
1176 "SAS_TASK_NEED_DEV_RESET is set for "
1177 "task %p on dev %p\n",
1178 __func__
, task
, isci_device
);
1182 /* The request has already completed and there
1183 * is nothing to do here other than to set the task
1184 * done bit, and indicate that the task abort function
1187 isci_set_task_doneflags(task
);
1189 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
1191 ret
= TMF_RESP_FUNC_COMPLETE
;
1193 dev_dbg(&isci_host
->pdev
->dev
,
1194 "%s: abort task not needed for %p\n",
1201 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
1203 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
1205 /* Check the request status and change to "aborting" if currently
1206 * "starting"; if true then set the I/O kernel completion
1207 * struct that will be triggered when the request completes.
1209 old_state
= isci_task_validate_request_to_abort(
1210 old_request
, isci_host
, isci_device
,
1211 &aborted_io_completion
);
1212 if ((old_state
!= started
) && (old_state
!= completed
)) {
1214 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1216 /* The request was already being handled by someone else (because
1217 * they got to set the state away from started).
1219 dev_dbg(&isci_host
->pdev
->dev
,
1220 "%s: device = %p; old_request %p already being aborted\n",
1222 isci_device
, old_request
);
1224 return TMF_RESP_FUNC_COMPLETE
;
1226 if ((task
->task_proto
== SAS_PROTOCOL_SMP
)
1228 || old_request
->complete_in_target
1231 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1233 dev_dbg(&isci_host
->pdev
->dev
,
1234 "%s: SMP request (%d)"
1235 " or device is stopping (%d)"
1236 " or complete_in_target (%d), thus no TMF\n",
1237 __func__
, (task
->task_proto
== SAS_PROTOCOL_SMP
),
1238 device_stopping
, old_request
->complete_in_target
);
1240 /* Set the state on the task. */
1241 isci_task_all_done(task
);
1243 ret
= TMF_RESP_FUNC_COMPLETE
;
1245 /* Stopping and SMP devices are not sent a TMF, and are not
1246 * reset, but the outstanding I/O request is terminated below.
1249 /* Fill in the tmf stucture */
1250 isci_task_build_tmf(&tmf
, isci_device
, isci_tmf_ssp_task_abort
,
1251 isci_abort_task_process_cb
, old_request
);
1253 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1255 #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */
1256 ret
= isci_task_execute_tmf(isci_host
, &tmf
,
1257 ISCI_ABORT_TASK_TIMEOUT_MS
);
1259 if (ret
!= TMF_RESP_FUNC_COMPLETE
)
1260 dev_err(&isci_host
->pdev
->dev
,
1261 "%s: isci_task_send_tmf failed\n",
1264 if (ret
== TMF_RESP_FUNC_COMPLETE
) {
1265 old_request
->complete_in_target
= true;
1267 /* Clean up the request on our side, and wait for the aborted I/O to
1270 isci_terminate_request_core(isci_host
, isci_device
, old_request
,
1271 &aborted_io_completion
);
1274 /* Make sure we do not leave a reference to aborted_io_completion */
1275 old_request
->io_request_completion
= NULL
;
1280 * isci_task_abort_task_set() - This function is one of the SAS Domain Template
1281 * functions. This is one of the Task Management functoins called by libsas,
1282 * to abort all task for the given lun.
1283 * @d_device: This parameter specifies the domain device associated with this
1285 * @lun: This parameter specifies the lun associated with this request.
1287 * status, zero indicates success.
1289 int isci_task_abort_task_set(
1290 struct domain_device
*d_device
,
1293 return TMF_RESP_FUNC_FAILED
;
1298 * isci_task_clear_aca() - This function is one of the SAS Domain Template
1299 * functions. This is one of the Task Management functoins called by libsas.
1300 * @d_device: This parameter specifies the domain device associated with this
1302 * @lun: This parameter specifies the lun associated with this request.
1304 * status, zero indicates success.
1306 int isci_task_clear_aca(
1307 struct domain_device
*d_device
,
1310 return TMF_RESP_FUNC_FAILED
;
1316 * isci_task_clear_task_set() - This function is one of the SAS Domain Template
1317 * functions. This is one of the Task Management functoins called by libsas.
1318 * @d_device: This parameter specifies the domain device associated with this
1320 * @lun: This parameter specifies the lun associated with this request.
1322 * status, zero indicates success.
1324 int isci_task_clear_task_set(
1325 struct domain_device
*d_device
,
1328 return TMF_RESP_FUNC_FAILED
;
1333 * isci_task_query_task() - This function is implemented to cause libsas to
1334 * correctly escalate the failed abort to a LUN or target reset (this is
1335 * because sas_scsi_find_task libsas function does not correctly interpret
1336 * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is
1337 * returned, libsas turns this into a LUN reset; when FUNC_FAILED is
1338 * returned, libsas will turn this into a target reset
1339 * @task: This parameter specifies the sas task being queried.
1340 * @lun: This parameter specifies the lun associated with this request.
1342 * status, zero indicates success.
1344 int isci_task_query_task(
1345 struct sas_task
*task
)
1347 /* See if there is a pending device reset for this device. */
1348 if (task
->task_state_flags
& SAS_TASK_NEED_DEV_RESET
)
1349 return TMF_RESP_FUNC_FAILED
;
1351 return TMF_RESP_FUNC_SUCC
;
1355 * isci_task_request_complete() - This function is called by the sci core when
1356 * an task request completes.
1357 * @isci_host: This parameter specifies the ISCI host object
1358 * @request: This parameter is the completed isci_request object.
1359 * @completion_status: This parameter specifies the completion status from the
1364 void isci_task_request_complete(
1365 struct isci_host
*isci_host
,
1366 struct isci_request
*request
,
1367 enum sci_task_status completion_status
)
1369 struct isci_remote_device
*isci_device
= request
->isci_device
;
1370 enum isci_request_status old_state
;
1371 struct isci_tmf
*tmf
= isci_request_access_tmf(request
);
1372 struct completion
*tmf_complete
;
1374 dev_dbg(&isci_host
->pdev
->dev
,
1375 "%s: request = %p, status=%d\n",
1376 __func__
, request
, completion_status
);
1378 old_state
= isci_request_change_state(request
, completed
);
1380 tmf
->status
= completion_status
;
1381 request
->complete_in_target
= true;
1383 if (SAS_PROTOCOL_SSP
== tmf
->proto
) {
1385 memcpy(&tmf
->resp
.resp_iu
,
1386 scic_io_request_get_response_iu_address(
1387 request
->sci_request_handle
1389 sizeof(struct sci_ssp_response_iu
));
1391 } else if (SAS_PROTOCOL_SATA
== tmf
->proto
) {
1393 memcpy(&tmf
->resp
.d2h_fis
,
1394 scic_stp_io_request_get_d2h_reg_address(
1395 request
->sci_request_handle
1397 sizeof(struct sata_fis_reg_d2h
)
1401 /* Manage the timer if it is still running. */
1402 if (tmf
->timeout_timer
) {
1403 isci_del_timer(isci_host
, tmf
->timeout_timer
);
1404 tmf
->timeout_timer
= NULL
;
1407 /* PRINT_TMF( ((struct isci_tmf *)request->task)); */
1408 tmf_complete
= tmf
->complete
;
1410 scic_controller_complete_task(
1411 isci_host
->core_controller
,
1412 to_sci_dev(isci_device
),
1413 request
->sci_request_handle
1415 /* NULL the request handle to make sure it cannot be terminated
1416 * or completed again.
1418 request
->sci_request_handle
= NULL
;
1420 isci_request_change_state(request
, unallocated
);
1421 list_del_init(&request
->dev_node
);
1423 /* The task management part completes last. */
1424 complete(tmf_complete
);
1429 * isci_task_ssp_request_get_lun() - This function is called by the sci core to
1430 * retrieve the lun for a given task request.
1431 * @request: This parameter is the isci_request object.
1433 * lun for specified task request.
1435 u32
isci_task_ssp_request_get_lun(struct isci_request
*request
)
1437 struct isci_tmf
*isci_tmf
= isci_request_access_tmf(request
);
1439 dev_dbg(&request
->isci_host
->pdev
->dev
,
1440 "%s: lun = %d\n", __func__
, isci_tmf
->lun
[0]);
1441 /* @todo: build lun from array of bytes to 32 bit */
1442 return isci_tmf
->lun
[0];
1446 * isci_task_ssp_request_get_function() - This function is called by the sci
1447 * core to retrieve the function for a given task request.
1448 * @request: This parameter is the isci_request object.
1450 * function code for specified task request.
1452 u8
isci_task_ssp_request_get_function(struct isci_request
*request
)
1454 struct isci_tmf
*isci_tmf
= isci_request_access_tmf(request
);
1456 dev_dbg(&request
->isci_host
->pdev
->dev
,
1457 "%s: func = %d\n", __func__
, isci_tmf
->tmf_code
);
1459 return isci_tmf
->tmf_code
;
1463 * isci_task_ssp_request_get_io_tag_to_manage() - This function is called by
1464 * the sci core to retrieve the io tag for a given task request.
1465 * @request: This parameter is the isci_request object.
1467 * io tag for specified task request.
1469 u16
isci_task_ssp_request_get_io_tag_to_manage(struct isci_request
*request
)
1471 u16 io_tag
= SCI_CONTROLLER_INVALID_IO_TAG
;
1473 if (tmf_task
== request
->ttype
) {
1474 struct isci_tmf
*tmf
= isci_request_access_tmf(request
);
1475 io_tag
= tmf
->io_tag
;
1478 dev_dbg(&request
->isci_host
->pdev
->dev
,
1479 "%s: request = %p, io_tag = %d\n",
1480 __func__
, request
, io_tag
);
1486 * isci_task_ssp_request_get_response_data_address() - This function is called
1487 * by the sci core to retrieve the response data address for a given task
1489 * @request: This parameter is the isci_request object.
1491 * response data address for specified task request.
1493 void *isci_task_ssp_request_get_response_data_address(
1494 struct isci_request
*request
)
1496 struct isci_tmf
*isci_tmf
= isci_request_access_tmf(request
);
1498 return &isci_tmf
->resp
.resp_iu
;
1502 * isci_task_ssp_request_get_response_data_length() - This function is called
1503 * by the sci core to retrieve the response data length for a given task
1505 * @request: This parameter is the isci_request object.
1507 * response data length for specified task request.
1509 u32
isci_task_ssp_request_get_response_data_length(
1510 struct isci_request
*request
)
1512 struct isci_tmf
*isci_tmf
= isci_request_access_tmf(request
);
1514 return sizeof(isci_tmf
->resp
.resp_iu
);
1518 * isci_bus_reset_handler() - This function performs a target reset of the
1519 * device referenced by "cmd'. This function is exported through the
1520 * "struct scsi_host_template" structure such that it is called when an I/O
1521 * recovery process has escalated to a target reset. Note that this function
1522 * is called from the scsi error handler event thread, so may block on calls.
1523 * @scsi_cmd: This parameter specifies the target to be reset.
1525 * SUCCESS if the reset process was successful, else FAILED.
1527 int isci_bus_reset_handler(struct scsi_cmnd
*cmd
)
1529 unsigned long flags
= 0;
1530 struct isci_host
*isci_host
= NULL
;
1531 enum sci_status status
;
1533 struct isci_remote_device
*isci_dev
1534 = isci_dev_from_domain_dev(
1535 sdev_to_domain_dev(cmd
->device
));
1537 dev_dbg(&cmd
->device
->sdev_gendev
,
1538 "%s: cmd %p, isci_dev %p\n",
1539 __func__
, cmd
, isci_dev
);
1542 dev_warn(&cmd
->device
->sdev_gendev
,
1543 "%s: isci_dev is GONE!\n",
1546 return TMF_RESP_FUNC_COMPLETE
; /* Nothing to reset. */
1549 if (isci_dev
->isci_port
!= NULL
)
1550 isci_host
= isci_dev
->isci_port
->isci_host
;
1552 if (isci_host
!= NULL
)
1553 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
1555 status
= scic_remote_device_reset(to_sci_dev(isci_dev
));
1556 if (status
!= SCI_SUCCESS
) {
1558 if (isci_host
!= NULL
)
1559 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1561 scmd_printk(KERN_WARNING
, cmd
,
1562 "%s: scic_remote_device_reset(%p) returned %d!\n",
1563 __func__
, isci_dev
, status
);
1565 return TMF_RESP_FUNC_FAILED
;
1567 if (isci_host
!= NULL
)
1568 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1570 /* Make sure all pending requests are able to be fully terminated. */
1571 isci_device_clear_reset_pending(isci_dev
);
1573 /* Terminate in-progress I/O now. */
1574 isci_remote_device_nuke_requests(isci_dev
);
1576 /* Call into the libsas default handler (which calls sas_phy_reset). */
1577 base_status
= sas_eh_bus_reset_handler(cmd
);
1579 if (base_status
!= SUCCESS
) {
1581 /* There can be cases where the resets to individual devices
1582 * behind an expander will fail because of an unplug of the
1585 scmd_printk(KERN_WARNING
, cmd
,
1586 "%s: sas_eh_bus_reset_handler(%p) returned %d!\n",
1587 __func__
, cmd
, base_status
);
1590 /* WHAT TO DO HERE IF sas_phy_reset FAILS? */
1592 if (isci_host
!= NULL
)
1593 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
1594 status
= scic_remote_device_reset_complete(to_sci_dev(isci_dev
));
1596 if (isci_host
!= NULL
)
1597 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1599 if (status
!= SCI_SUCCESS
) {
1600 scmd_printk(KERN_WARNING
, cmd
,
1601 "%s: scic_remote_device_reset_complete(%p) "
1603 __func__
, isci_dev
, status
);
1605 /* WHAT TO DO HERE IF scic_remote_device_reset_complete FAILS? */
1607 dev_dbg(&cmd
->device
->sdev_gendev
,
1608 "%s: cmd %p, isci_dev %p complete.\n",
1609 __func__
, cmd
, isci_dev
);
1611 return TMF_RESP_FUNC_COMPLETE
;