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
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46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 #include <linux/completion.h>
57 #include <linux/irqflags.h>
59 #include <scsi/libsas.h>
60 #include "remote_device.h"
61 #include "remote_node_context.h"
68 * isci_task_refuse() - complete the request to the upper layer driver in
69 * the case where an I/O needs to be completed back in the submit path.
70 * @ihost: host on which the the request was queued
71 * @task: request to complete
72 * @response: response code for the completed task.
73 * @status: status code for the completed task.
76 static void isci_task_refuse(struct isci_host
*ihost
, struct sas_task
*task
,
77 enum service_response response
,
78 enum exec_status status
)
81 enum isci_completion_selection disposition
;
83 disposition
= isci_perform_normal_io_completion
;
84 disposition
= isci_task_set_completion_status(task
, response
, status
,
87 /* Tasks aborted specifically by a call to the lldd_abort_task
88 * function should not be completed to the host in the regular path.
90 switch (disposition
) {
91 case isci_perform_normal_io_completion
:
92 /* Normal notification (task_done) */
93 dev_dbg(&ihost
->pdev
->dev
,
94 "%s: Normal - task = %p, response=%d, "
96 __func__
, task
, response
, status
);
98 task
->lldd_task
= NULL
;
100 isci_execpath_callback(ihost
, task
, task
->task_done
);
103 case isci_perform_aborted_io_completion
:
104 /* No notification because this request is already in the
107 dev_warn(&ihost
->pdev
->dev
,
108 "%s: Aborted - task = %p, response=%d, "
110 __func__
, task
, response
, status
);
113 case isci_perform_error_io_completion
:
114 /* Use sas_task_abort */
115 dev_warn(&ihost
->pdev
->dev
,
116 "%s: Error - task = %p, response=%d, "
118 __func__
, task
, response
, status
);
120 isci_execpath_callback(ihost
, task
, sas_task_abort
);
124 dev_warn(&ihost
->pdev
->dev
,
125 "%s: isci task notification default case!",
127 sas_task_abort(task
);
132 #define for_each_sas_task(num, task) \
133 for (; num > 0; num--,\
134 task = list_entry(task->list.next, struct sas_task, list))
137 * isci_task_execute_task() - This function is one of the SAS Domain Template
138 * functions. This function is called by libsas to send a task down to
140 * @task: This parameter specifies the SAS task to send.
141 * @num: This parameter specifies the number of tasks to queue.
142 * @gfp_flags: This parameter specifies the context of this call.
144 * status, zero indicates success.
146 int isci_task_execute_task(struct sas_task
*task
, int num
, gfp_t gfp_flags
)
148 struct isci_host
*ihost
= dev_to_ihost(task
->dev
);
149 struct isci_remote_device
*idev
;
150 enum sci_status status
;
155 dev_dbg(&ihost
->pdev
->dev
, "%s: num=%d\n", __func__
, num
);
157 /* Check if we have room for more tasks */
158 ret
= isci_host_can_queue(ihost
, num
);
161 dev_warn(&ihost
->pdev
->dev
, "%s: queue full\n", __func__
);
165 for_each_sas_task(num
, task
) {
166 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
167 idev
= isci_lookup_device(task
->dev
);
168 io_ready
= idev
? test_bit(IDEV_IO_READY
, &idev
->flags
) : 0;
169 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
171 dev_dbg(&ihost
->pdev
->dev
,
172 "task: %p, num: %d dev: %p idev: %p:%#lx cmd = %p\n",
173 task
, num
, task
->dev
, idev
, idev
? idev
->flags
: 0,
177 isci_task_refuse(ihost
, task
, SAS_TASK_UNDELIVERED
,
179 isci_host_can_dequeue(ihost
, 1);
180 } else if (!io_ready
) {
181 /* Indicate QUEUE_FULL so that the scsi midlayer
184 isci_task_refuse(ihost
, task
, SAS_TASK_COMPLETE
,
186 isci_host_can_dequeue(ihost
, 1);
188 /* There is a device and it's ready for I/O. */
189 spin_lock_irqsave(&task
->task_state_lock
, flags
);
191 if (task
->task_state_flags
& SAS_TASK_STATE_ABORTED
) {
192 /* The I/O was aborted. */
193 spin_unlock_irqrestore(&task
->task_state_lock
,
196 isci_task_refuse(ihost
, task
,
197 SAS_TASK_UNDELIVERED
,
198 SAM_STAT_TASK_ABORTED
);
199 isci_host_can_dequeue(ihost
, 1);
201 task
->task_state_flags
|= SAS_TASK_AT_INITIATOR
;
202 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
204 /* build and send the request. */
205 status
= isci_request_execute(ihost
, idev
, task
, gfp_flags
);
207 if (status
!= SCI_SUCCESS
) {
209 spin_lock_irqsave(&task
->task_state_lock
, flags
);
210 /* Did not really start this command. */
211 task
->task_state_flags
&= ~SAS_TASK_AT_INITIATOR
;
212 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
214 /* Indicate QUEUE_FULL so that the scsi
215 * midlayer retries. if the request
216 * failed for remote device reasons,
217 * it gets returned as
218 * SAS_TASK_UNDELIVERED next time
221 isci_task_refuse(ihost
, task
,
224 isci_host_can_dequeue(ihost
, 1);
228 isci_put_device(idev
);
233 static struct isci_request
*isci_task_request_build(struct isci_host
*ihost
,
234 struct isci_remote_device
*idev
,
235 struct isci_tmf
*isci_tmf
)
237 enum sci_status status
= SCI_FAILURE
;
238 struct isci_request
*ireq
= NULL
;
239 struct domain_device
*dev
;
241 dev_dbg(&ihost
->pdev
->dev
,
242 "%s: isci_tmf = %p\n", __func__
, isci_tmf
);
244 dev
= idev
->domain_dev
;
246 /* do common allocation and init of request object. */
247 ireq
= isci_request_alloc_tmf(ihost
, isci_tmf
, GFP_ATOMIC
);
251 /* let the core do it's construct. */
252 status
= scic_task_request_construct(&ihost
->sci
, &idev
->sci
,
253 SCI_CONTROLLER_INVALID_IO_TAG
,
256 if (status
!= SCI_SUCCESS
) {
257 dev_warn(&ihost
->pdev
->dev
,
258 "%s: scic_task_request_construct failed - "
265 /* XXX convert to get this from task->tproto like other drivers */
266 if (dev
->dev_type
== SAS_END_DEV
) {
267 isci_tmf
->proto
= SAS_PROTOCOL_SSP
;
268 status
= scic_task_request_construct_ssp(&ireq
->sci
);
269 if (status
!= SCI_SUCCESS
)
273 if (dev
->dev_type
== SATA_DEV
|| (dev
->tproto
& SAS_PROTOCOL_STP
)) {
274 isci_tmf
->proto
= SAS_PROTOCOL_SATA
;
275 status
= isci_sata_management_task_request_build(ireq
);
277 if (status
!= SCI_SUCCESS
)
282 isci_request_free(ihost
, ireq
);
287 int isci_task_execute_tmf(struct isci_host
*ihost
,
288 struct isci_remote_device
*isci_device
,
289 struct isci_tmf
*tmf
, unsigned long timeout_ms
)
291 DECLARE_COMPLETION_ONSTACK(completion
);
292 enum sci_task_status status
= SCI_TASK_FAILURE
;
293 struct scic_sds_remote_device
*sci_device
;
294 struct isci_request
*ireq
;
295 int ret
= TMF_RESP_FUNC_FAILED
;
297 unsigned long timeleft
;
299 /* sanity check, return TMF_RESP_FUNC_FAILED
300 * if the device is not there and ready.
302 if (!isci_device
|| !test_bit(IDEV_IO_READY
, &isci_device
->flags
)) {
303 dev_dbg(&ihost
->pdev
->dev
,
304 "%s: isci_device = %p not ready (%#lx)\n",
306 isci_device
, isci_device
? isci_device
->flags
: 0);
307 return TMF_RESP_FUNC_FAILED
;
309 dev_dbg(&ihost
->pdev
->dev
,
310 "%s: isci_device = %p\n",
311 __func__
, isci_device
);
313 sci_device
= &isci_device
->sci
;
315 /* Assign the pointer to the TMF's completion kernel wait structure. */
316 tmf
->complete
= &completion
;
318 ireq
= isci_task_request_build(ihost
, isci_device
, tmf
);
320 dev_warn(&ihost
->pdev
->dev
,
321 "%s: isci_task_request_build failed\n",
323 return TMF_RESP_FUNC_FAILED
;
326 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
328 /* start the TMF io. */
329 status
= scic_controller_start_task(
333 SCI_CONTROLLER_INVALID_IO_TAG
);
335 if (status
!= SCI_TASK_SUCCESS
) {
336 dev_warn(&ihost
->pdev
->dev
,
337 "%s: start_io failed - status = 0x%x, request = %p\n",
341 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
342 isci_request_free(ihost
, ireq
);
346 if (tmf
->cb_state_func
!= NULL
)
347 tmf
->cb_state_func(isci_tmf_started
, tmf
, tmf
->cb_data
);
349 isci_request_change_state(ireq
, started
);
351 /* add the request to the remote device request list. */
352 list_add(&ireq
->dev_node
, &isci_device
->reqs_in_process
);
354 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
356 /* Wait for the TMF to complete, or a timeout. */
357 timeleft
= wait_for_completion_timeout(&completion
,
358 msecs_to_jiffies(timeout_ms
));
361 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
363 if (tmf
->cb_state_func
!= NULL
)
364 tmf
->cb_state_func(isci_tmf_timed_out
, tmf
, tmf
->cb_data
);
366 scic_controller_terminate_request(&ihost
->sci
,
370 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
372 wait_for_completion(tmf
->complete
);
377 if (tmf
->status
== SCI_SUCCESS
)
378 ret
= TMF_RESP_FUNC_COMPLETE
;
379 else if (tmf
->status
== SCI_FAILURE_IO_RESPONSE_VALID
) {
380 dev_dbg(&ihost
->pdev
->dev
,
382 "SCI_FAILURE_IO_RESPONSE_VALID\n",
384 ret
= TMF_RESP_FUNC_COMPLETE
;
386 /* Else - leave the default "failed" status alone. */
388 dev_dbg(&ihost
->pdev
->dev
,
389 "%s: completed request = %p\n",
396 void isci_task_build_tmf(
397 struct isci_tmf
*tmf
,
398 enum isci_tmf_function_codes code
,
399 void (*tmf_sent_cb
)(enum isci_tmf_cb_state
,
404 memset(tmf
, 0, sizeof(*tmf
));
406 tmf
->tmf_code
= code
;
407 tmf
->cb_state_func
= tmf_sent_cb
;
408 tmf
->cb_data
= cb_data
;
411 static void isci_task_build_abort_task_tmf(
412 struct isci_tmf
*tmf
,
413 enum isci_tmf_function_codes code
,
414 void (*tmf_sent_cb
)(enum isci_tmf_cb_state
,
417 struct isci_request
*old_request
)
419 isci_task_build_tmf(tmf
, code
, tmf_sent_cb
,
420 (void *)old_request
);
421 tmf
->io_tag
= old_request
->io_tag
;
425 * isci_task_validate_request_to_abort() - This function checks the given I/O
426 * against the "started" state. If the request is still "started", it's
427 * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD
428 * BEFORE CALLING THIS FUNCTION.
429 * @isci_request: This parameter specifies the request object to control.
430 * @isci_host: This parameter specifies the ISCI host object
431 * @isci_device: This is the device to which the request is pending.
432 * @aborted_io_completion: This is a completion structure that will be added to
433 * the request in case it is changed to aborting; this completion is
434 * triggered when the request is fully completed.
436 * Either "started" on successful change of the task status to "aborted", or
437 * "unallocated" if the task cannot be controlled.
439 static enum isci_request_status
isci_task_validate_request_to_abort(
440 struct isci_request
*isci_request
,
441 struct isci_host
*isci_host
,
442 struct isci_remote_device
*isci_device
,
443 struct completion
*aborted_io_completion
)
445 enum isci_request_status old_state
= unallocated
;
447 /* Only abort the task if it's in the
448 * device's request_in_process list
450 if (isci_request
&& !list_empty(&isci_request
->dev_node
)) {
451 old_state
= isci_request_change_started_to_aborted(
452 isci_request
, aborted_io_completion
);
460 * isci_request_cleanup_completed_loiterer() - This function will take care of
461 * the final cleanup on any request which has been explicitly terminated.
462 * @isci_host: This parameter specifies the ISCI host object
463 * @isci_device: This is the device to which the request is pending.
464 * @isci_request: This parameter specifies the terminated request object.
465 * @task: This parameter is the libsas I/O request.
467 static void isci_request_cleanup_completed_loiterer(
468 struct isci_host
*isci_host
,
469 struct isci_remote_device
*isci_device
,
470 struct isci_request
*isci_request
,
471 struct sas_task
*task
)
475 dev_dbg(&isci_host
->pdev
->dev
,
476 "%s: isci_device=%p, request=%p, task=%p\n",
477 __func__
, isci_device
, isci_request
, task
);
481 spin_lock_irqsave(&task
->task_state_lock
, flags
);
482 task
->lldd_task
= NULL
;
484 task
->task_state_flags
&= ~SAS_TASK_NEED_DEV_RESET
;
486 isci_set_task_doneflags(task
);
488 /* If this task is not in the abort path, call task_done. */
489 if (!(task
->task_state_flags
& SAS_TASK_STATE_ABORTED
)) {
491 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
492 task
->task_done(task
);
494 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
497 if (isci_request
!= NULL
) {
498 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
499 list_del_init(&isci_request
->dev_node
);
500 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
502 isci_request_free(isci_host
, isci_request
);
507 * isci_terminate_request_core() - This function will terminate the given
508 * request, and wait for it to complete. This function must only be called
509 * from a thread that can wait. Note that the request is terminated and
510 * completed (back to the host, if started there).
511 * @isci_host: This SCU.
512 * @isci_device: The target.
513 * @isci_request: The I/O request to be terminated.
516 static void isci_terminate_request_core(
517 struct isci_host
*isci_host
,
518 struct isci_remote_device
*isci_device
,
519 struct isci_request
*isci_request
)
521 enum sci_status status
= SCI_SUCCESS
;
522 bool was_terminated
= false;
523 bool needs_cleanup_handling
= false;
524 enum isci_request_status request_status
;
526 unsigned long termination_completed
= 1;
527 struct completion
*io_request_completion
;
528 struct sas_task
*task
;
530 dev_dbg(&isci_host
->pdev
->dev
,
531 "%s: device = %p; request = %p\n",
532 __func__
, isci_device
, isci_request
);
534 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
536 io_request_completion
= isci_request
->io_request_completion
;
538 task
= (isci_request
->ttype
== io_task
)
539 ? isci_request_access_task(isci_request
)
542 /* Note that we are not going to control
543 * the target to abort the request.
545 isci_request
->complete_in_target
= true;
547 /* Make sure the request wasn't just sitting around signalling
548 * device condition (if the request handle is NULL, then the
549 * request completed but needed additional handling here).
551 if (!isci_request
->terminated
) {
552 was_terminated
= true;
553 needs_cleanup_handling
= true;
554 status
= scic_controller_terminate_request(
559 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
562 * The only time the request to terminate will
563 * fail is when the io request is completed and
566 if (status
!= SCI_SUCCESS
) {
567 dev_err(&isci_host
->pdev
->dev
,
568 "%s: scic_controller_terminate_request"
569 " returned = 0x%x\n",
572 isci_request
->io_request_completion
= NULL
;
575 if (was_terminated
) {
576 dev_dbg(&isci_host
->pdev
->dev
,
577 "%s: before completion wait (%p/%p)\n",
578 __func__
, isci_request
, io_request_completion
);
580 /* Wait here for the request to complete. */
581 #define TERMINATION_TIMEOUT_MSEC 500
582 termination_completed
583 = wait_for_completion_timeout(
584 io_request_completion
,
585 msecs_to_jiffies(TERMINATION_TIMEOUT_MSEC
));
587 if (!termination_completed
) {
589 /* The request to terminate has timed out. */
590 spin_lock_irqsave(&isci_host
->scic_lock
,
593 /* Check for state changes. */
594 if (!isci_request
->terminated
) {
596 /* The best we can do is to have the
597 * request die a silent death if it
598 * ever really completes.
600 * Set the request state to "dead",
601 * and clear the task pointer so that
602 * an actual completion event callback
603 * doesn't do anything.
605 isci_request
->status
= dead
;
606 isci_request
->io_request_completion
609 if (isci_request
->ttype
== io_task
) {
611 /* Break links with the
614 isci_request
->ttype_ptr
.io_task_ptr
618 termination_completed
= 1;
620 spin_unlock_irqrestore(&isci_host
->scic_lock
,
623 if (!termination_completed
) {
625 dev_err(&isci_host
->pdev
->dev
,
626 "%s: *** Timeout waiting for "
627 "termination(%p/%p)\n",
628 __func__
, io_request_completion
,
631 /* The request can no longer be referenced
632 * safely since it may go away if the
633 * termination every really does complete.
638 if (termination_completed
)
639 dev_dbg(&isci_host
->pdev
->dev
,
640 "%s: after completion wait (%p/%p)\n",
641 __func__
, isci_request
, io_request_completion
);
644 if (termination_completed
) {
646 isci_request
->io_request_completion
= NULL
;
648 /* Peek at the status of the request. This will tell
649 * us if there was special handling on the request such that it
650 * needs to be detached and freed here.
652 spin_lock_irqsave(&isci_request
->state_lock
, flags
);
653 request_status
= isci_request_get_state(isci_request
);
655 if ((isci_request
->ttype
== io_task
) /* TMFs are in their own thread */
656 && ((request_status
== aborted
)
657 || (request_status
== aborting
)
658 || (request_status
== terminating
)
659 || (request_status
== completed
)
660 || (request_status
== dead
)
664 /* The completion routine won't free a request in
665 * the aborted/aborting/etc. states, so we do
668 needs_cleanup_handling
= true;
670 spin_unlock_irqrestore(&isci_request
->state_lock
, flags
);
673 if (needs_cleanup_handling
)
674 isci_request_cleanup_completed_loiterer(
675 isci_host
, isci_device
, isci_request
, task
);
680 * isci_terminate_pending_requests() - This function will change the all of the
681 * requests on the given device's state to "aborting", will terminate the
682 * requests, and wait for them to complete. This function must only be
683 * called from a thread that can wait. Note that the requests are all
684 * terminated and completed (back to the host, if started there).
685 * @isci_host: This parameter specifies SCU.
686 * @isci_device: This parameter specifies the target.
689 void isci_terminate_pending_requests(struct isci_host
*ihost
,
690 struct isci_remote_device
*idev
)
692 struct completion request_completion
;
693 enum isci_request_status old_state
;
697 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
698 list_splice_init(&idev
->reqs_in_process
, &list
);
700 /* assumes that isci_terminate_request_core deletes from the list */
701 while (!list_empty(&list
)) {
702 struct isci_request
*ireq
= list_entry(list
.next
, typeof(*ireq
), dev_node
);
704 /* Change state to "terminating" if it is currently
707 old_state
= isci_request_change_started_to_newstate(ireq
,
716 /* termination in progress, or otherwise dispositioned.
717 * We know the request was on 'list' so should be safe
718 * to move it back to reqs_in_process
720 list_move(&ireq
->dev_node
, &idev
->reqs_in_process
);
727 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
729 init_completion(&request_completion
);
731 dev_dbg(&ihost
->pdev
->dev
,
732 "%s: idev=%p request=%p; task=%p old_state=%d\n",
733 __func__
, idev
, ireq
,
734 ireq
->ttype
== io_task
? isci_request_access_task(ireq
) : NULL
,
737 /* If the old_state is started:
738 * This request was not already being aborted. If it had been,
739 * then the aborting I/O (ie. the TMF request) would not be in
740 * the aborting state, and thus would be terminated here. Note
741 * that since the TMF completion's call to the kernel function
742 * "complete()" does not happen until the pending I/O request
743 * terminate fully completes, we do not have to implement a
744 * special wait here for already aborting requests - the
745 * termination of the TMF request will force the request
746 * to finish it's already started terminate.
748 * If old_state == completed:
749 * This request completed from the SCU hardware perspective
750 * and now just needs cleaning up in terms of freeing the
751 * request and potentially calling up to libsas.
753 * If old_state == aborting:
754 * This request has already gone through a TMF timeout, but may
755 * not have been terminated; needs cleaning up at least.
757 isci_terminate_request_core(ihost
, idev
, ireq
);
758 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
760 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
764 * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain
765 * Template functions.
766 * @lun: This parameter specifies the lun to be reset.
768 * status, zero indicates success.
770 static int isci_task_send_lu_reset_sas(
771 struct isci_host
*isci_host
,
772 struct isci_remote_device
*isci_device
,
776 int ret
= TMF_RESP_FUNC_FAILED
;
778 dev_dbg(&isci_host
->pdev
->dev
,
779 "%s: isci_host = %p, isci_device = %p\n",
780 __func__
, isci_host
, isci_device
);
781 /* Send the LUN reset to the target. By the time the call returns,
782 * the TMF has fully exected in the target (in which case the return
783 * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or
784 * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED").
786 isci_task_build_tmf(&tmf
, isci_tmf_ssp_lun_reset
, NULL
, NULL
);
788 #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */
789 ret
= isci_task_execute_tmf(isci_host
, isci_device
, &tmf
, ISCI_LU_RESET_TIMEOUT_MS
);
791 if (ret
== TMF_RESP_FUNC_COMPLETE
)
792 dev_dbg(&isci_host
->pdev
->dev
,
793 "%s: %p: TMF_LU_RESET passed\n",
794 __func__
, isci_device
);
796 dev_dbg(&isci_host
->pdev
->dev
,
797 "%s: %p: TMF_LU_RESET failed (%x)\n",
798 __func__
, isci_device
, ret
);
804 * isci_task_lu_reset() - This function is one of the SAS Domain Template
805 * functions. This is one of the Task Management functoins called by libsas,
806 * to reset the given lun. Note the assumption that while this call is
807 * executing, no I/O will be sent by the host to the device.
808 * @lun: This parameter specifies the lun to be reset.
810 * status, zero indicates success.
812 int isci_task_lu_reset(struct domain_device
*domain_device
, u8
*lun
)
814 struct isci_host
*isci_host
= dev_to_ihost(domain_device
);
815 struct isci_remote_device
*isci_device
;
819 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
820 isci_device
= isci_lookup_device(domain_device
);
821 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
823 dev_dbg(&isci_host
->pdev
->dev
,
824 "%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
825 __func__
, domain_device
, isci_host
, isci_device
);
828 set_bit(IDEV_EH
, &isci_device
->flags
);
830 /* If there is a device reset pending on any request in the
831 * device's list, fail this LUN reset request in order to
832 * escalate to the device reset.
835 isci_device_is_reset_pending(isci_host
, isci_device
)) {
836 dev_warn(&isci_host
->pdev
->dev
,
837 "%s: No dev (%p), or "
838 "RESET PENDING: domain_device=%p\n",
839 __func__
, isci_device
, domain_device
);
840 ret
= TMF_RESP_FUNC_FAILED
;
844 /* Send the task management part of the reset. */
845 if (sas_protocol_ata(domain_device
->tproto
)) {
846 ret
= isci_task_send_lu_reset_sata(isci_host
, isci_device
, lun
);
848 ret
= isci_task_send_lu_reset_sas(isci_host
, isci_device
, lun
);
850 /* If the LUN reset worked, all the I/O can now be terminated. */
851 if (ret
== TMF_RESP_FUNC_COMPLETE
)
852 /* Terminate all I/O now. */
853 isci_terminate_pending_requests(isci_host
,
857 isci_put_device(isci_device
);
862 /* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */
863 int isci_task_clear_nexus_port(struct asd_sas_port
*port
)
865 return TMF_RESP_FUNC_FAILED
;
870 int isci_task_clear_nexus_ha(struct sas_ha_struct
*ha
)
872 return TMF_RESP_FUNC_FAILED
;
875 /* Task Management Functions. Must be called from process context. */
878 * isci_abort_task_process_cb() - This is a helper function for the abort task
879 * TMF command. It manages the request state with respect to the successful
880 * transmission / completion of the abort task request.
881 * @cb_state: This parameter specifies when this function was called - after
882 * the TMF request has been started and after it has timed-out.
883 * @tmf: This parameter specifies the TMF in progress.
887 static void isci_abort_task_process_cb(
888 enum isci_tmf_cb_state cb_state
,
889 struct isci_tmf
*tmf
,
892 struct isci_request
*old_request
;
894 old_request
= (struct isci_request
*)cb_data
;
896 dev_dbg(&old_request
->isci_host
->pdev
->dev
,
897 "%s: tmf=%p, old_request=%p\n",
898 __func__
, tmf
, old_request
);
902 case isci_tmf_started
:
903 /* The TMF has been started. Nothing to do here, since the
904 * request state was already set to "aborted" by the abort
907 if ((old_request
->status
!= aborted
)
908 && (old_request
->status
!= completed
))
909 dev_err(&old_request
->isci_host
->pdev
->dev
,
910 "%s: Bad request status (%d): tmf=%p, old_request=%p\n",
911 __func__
, old_request
->status
, tmf
, old_request
);
914 case isci_tmf_timed_out
:
916 /* Set the task's state to "aborting", since the abort task
917 * function thread set it to "aborted" (above) in anticipation
918 * of the task management request working correctly. Since the
919 * timeout has now fired, the TMF request failed. We set the
920 * state such that the request completion will indicate the
921 * device is no longer present.
923 isci_request_change_state(old_request
, aborting
);
927 dev_err(&old_request
->isci_host
->pdev
->dev
,
928 "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n",
929 __func__
, cb_state
, tmf
, old_request
);
935 * isci_task_abort_task() - This function is one of the SAS Domain Template
936 * functions. This function is called by libsas to abort a specified task.
937 * @task: This parameter specifies the SAS task to abort.
939 * status, zero indicates success.
941 int isci_task_abort_task(struct sas_task
*task
)
943 struct isci_host
*isci_host
= dev_to_ihost(task
->dev
);
944 DECLARE_COMPLETION_ONSTACK(aborted_io_completion
);
945 struct isci_request
*old_request
= NULL
;
946 enum isci_request_status old_state
;
947 struct isci_remote_device
*isci_device
= NULL
;
949 int ret
= TMF_RESP_FUNC_FAILED
;
951 bool any_dev_reset
= false;
953 /* Get the isci_request reference from the task. Note that
954 * this check does not depend on the pending request list
955 * in the device, because tasks driving resets may land here
956 * after completion in the core.
958 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
959 spin_lock(&task
->task_state_lock
);
961 old_request
= task
->lldd_task
;
963 /* If task is already done, the request isn't valid */
964 if (!(task
->task_state_flags
& SAS_TASK_STATE_DONE
) &&
965 (task
->task_state_flags
& SAS_TASK_AT_INITIATOR
) &&
967 isci_device
= isci_lookup_device(task
->dev
);
969 spin_unlock(&task
->task_state_lock
);
970 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
972 dev_dbg(&isci_host
->pdev
->dev
,
973 "%s: task = %p\n", __func__
, task
);
975 if (!isci_device
|| !old_request
)
978 set_bit(IDEV_EH
, &isci_device
->flags
);
980 /* This version of the driver will fail abort requests for
981 * SATA/STP. Failing the abort request this way will cause the
982 * SCSI error handler thread to escalate to LUN reset
984 if (sas_protocol_ata(task
->task_proto
)) {
985 dev_warn(&isci_host
->pdev
->dev
,
986 " task %p is for a STP/SATA device;"
987 " returning TMF_RESP_FUNC_FAILED\n"
988 " to cause a LUN reset...\n", task
);
992 dev_dbg(&isci_host
->pdev
->dev
,
993 "%s: old_request == %p\n", __func__
, old_request
);
995 any_dev_reset
= isci_device_is_reset_pending(isci_host
,isci_device
);
997 spin_lock_irqsave(&task
->task_state_lock
, flags
);
999 any_dev_reset
= any_dev_reset
|| (task
->task_state_flags
& SAS_TASK_NEED_DEV_RESET
);
1001 /* If the extraction of the request reference from the task
1002 * failed, then the request has been completed (or if there is a
1003 * pending reset then this abort request function must be failed
1004 * in order to escalate to the target reset).
1006 if ((old_request
== NULL
) || any_dev_reset
) {
1008 /* If the device reset task flag is set, fail the task
1009 * management request. Otherwise, the original request
1012 if (any_dev_reset
) {
1014 /* Turn off the task's DONE to make sure this
1015 * task is escalated to a target reset.
1017 task
->task_state_flags
&= ~SAS_TASK_STATE_DONE
;
1019 /* Make the reset happen as soon as possible. */
1020 task
->task_state_flags
|= SAS_TASK_NEED_DEV_RESET
;
1022 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
1024 /* Fail the task management request in order to
1025 * escalate to the target reset.
1027 ret
= TMF_RESP_FUNC_FAILED
;
1029 dev_dbg(&isci_host
->pdev
->dev
,
1030 "%s: Failing task abort in order to "
1031 "escalate to target reset because\n"
1032 "SAS_TASK_NEED_DEV_RESET is set for "
1033 "task %p on dev %p\n",
1034 __func__
, task
, isci_device
);
1038 /* The request has already completed and there
1039 * is nothing to do here other than to set the task
1040 * done bit, and indicate that the task abort function
1043 isci_set_task_doneflags(task
);
1045 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
1047 ret
= TMF_RESP_FUNC_COMPLETE
;
1049 dev_dbg(&isci_host
->pdev
->dev
,
1050 "%s: abort task not needed for %p\n",
1056 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
1058 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
1060 /* Check the request status and change to "aborted" if currently
1061 * "starting"; if true then set the I/O kernel completion
1062 * struct that will be triggered when the request completes.
1064 old_state
= isci_task_validate_request_to_abort(
1065 old_request
, isci_host
, isci_device
,
1066 &aborted_io_completion
);
1067 if ((old_state
!= started
) &&
1068 (old_state
!= completed
) &&
1069 (old_state
!= aborting
)) {
1071 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1073 /* The request was already being handled by someone else (because
1074 * they got to set the state away from started).
1076 dev_dbg(&isci_host
->pdev
->dev
,
1077 "%s: device = %p; old_request %p already being aborted\n",
1079 isci_device
, old_request
);
1080 ret
= TMF_RESP_FUNC_COMPLETE
;
1083 if ((task
->task_proto
== SAS_PROTOCOL_SMP
)
1084 || old_request
->complete_in_target
1087 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1089 dev_dbg(&isci_host
->pdev
->dev
,
1090 "%s: SMP request (%d)"
1091 " or complete_in_target (%d), thus no TMF\n",
1092 __func__
, (task
->task_proto
== SAS_PROTOCOL_SMP
),
1093 old_request
->complete_in_target
);
1095 /* Set the state on the task. */
1096 isci_task_all_done(task
);
1098 ret
= TMF_RESP_FUNC_COMPLETE
;
1100 /* Stopping and SMP devices are not sent a TMF, and are not
1101 * reset, but the outstanding I/O request is terminated below.
1104 /* Fill in the tmf stucture */
1105 isci_task_build_abort_task_tmf(&tmf
, isci_tmf_ssp_task_abort
,
1106 isci_abort_task_process_cb
,
1109 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1111 #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */
1112 ret
= isci_task_execute_tmf(isci_host
, isci_device
, &tmf
,
1113 ISCI_ABORT_TASK_TIMEOUT_MS
);
1115 if (ret
!= TMF_RESP_FUNC_COMPLETE
)
1116 dev_err(&isci_host
->pdev
->dev
,
1117 "%s: isci_task_send_tmf failed\n",
1120 if (ret
== TMF_RESP_FUNC_COMPLETE
) {
1121 old_request
->complete_in_target
= true;
1123 /* Clean up the request on our side, and wait for the aborted
1126 isci_terminate_request_core(isci_host
, isci_device
, old_request
);
1129 /* Make sure we do not leave a reference to aborted_io_completion */
1130 old_request
->io_request_completion
= NULL
;
1132 isci_put_device(isci_device
);
1137 * isci_task_abort_task_set() - This function is one of the SAS Domain Template
1138 * functions. This is one of the Task Management functoins called by libsas,
1139 * to abort all task for the given lun.
1140 * @d_device: This parameter specifies the domain device associated with this
1142 * @lun: This parameter specifies the lun associated with this request.
1144 * status, zero indicates success.
1146 int isci_task_abort_task_set(
1147 struct domain_device
*d_device
,
1150 return TMF_RESP_FUNC_FAILED
;
1155 * isci_task_clear_aca() - This function is one of the SAS Domain Template
1156 * functions. This is one of the Task Management functoins called by libsas.
1157 * @d_device: This parameter specifies the domain device associated with this
1159 * @lun: This parameter specifies the lun associated with this request.
1161 * status, zero indicates success.
1163 int isci_task_clear_aca(
1164 struct domain_device
*d_device
,
1167 return TMF_RESP_FUNC_FAILED
;
1173 * isci_task_clear_task_set() - This function is one of the SAS Domain Template
1174 * functions. This is one of the Task Management functoins called by libsas.
1175 * @d_device: This parameter specifies the domain device associated with this
1177 * @lun: This parameter specifies the lun associated with this request.
1179 * status, zero indicates success.
1181 int isci_task_clear_task_set(
1182 struct domain_device
*d_device
,
1185 return TMF_RESP_FUNC_FAILED
;
1190 * isci_task_query_task() - This function is implemented to cause libsas to
1191 * correctly escalate the failed abort to a LUN or target reset (this is
1192 * because sas_scsi_find_task libsas function does not correctly interpret
1193 * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is
1194 * returned, libsas turns this into a LUN reset; when FUNC_FAILED is
1195 * returned, libsas will turn this into a target reset
1196 * @task: This parameter specifies the sas task being queried.
1197 * @lun: This parameter specifies the lun associated with this request.
1199 * status, zero indicates success.
1201 int isci_task_query_task(
1202 struct sas_task
*task
)
1204 /* See if there is a pending device reset for this device. */
1205 if (task
->task_state_flags
& SAS_TASK_NEED_DEV_RESET
)
1206 return TMF_RESP_FUNC_FAILED
;
1208 return TMF_RESP_FUNC_SUCC
;
1212 * isci_task_request_complete() - This function is called by the sci core when
1213 * an task request completes.
1214 * @ihost: This parameter specifies the ISCI host object
1215 * @ireq: This parameter is the completed isci_request object.
1216 * @completion_status: This parameter specifies the completion status from the
1222 isci_task_request_complete(struct isci_host
*ihost
,
1223 struct isci_request
*ireq
,
1224 enum sci_task_status completion_status
)
1226 struct isci_tmf
*tmf
= isci_request_access_tmf(ireq
);
1227 struct completion
*tmf_complete
;
1228 struct scic_sds_request
*sci_req
= &ireq
->sci
;
1230 dev_dbg(&ihost
->pdev
->dev
,
1231 "%s: request = %p, status=%d\n",
1232 __func__
, ireq
, completion_status
);
1234 isci_request_change_state(ireq
, completed
);
1236 tmf
->status
= completion_status
;
1237 ireq
->complete_in_target
= true;
1239 if (tmf
->proto
== SAS_PROTOCOL_SSP
) {
1240 memcpy(&tmf
->resp
.resp_iu
,
1242 SSP_RESP_IU_MAX_SIZE
);
1243 } else if (tmf
->proto
== SAS_PROTOCOL_SATA
) {
1244 memcpy(&tmf
->resp
.d2h_fis
,
1246 sizeof(struct dev_to_host_fis
));
1249 /* PRINT_TMF( ((struct isci_tmf *)request->task)); */
1250 tmf_complete
= tmf
->complete
;
1252 scic_controller_complete_io(&ihost
->sci
, ireq
->sci
.target_device
, &ireq
->sci
);
1253 /* set the 'terminated' flag handle to make sure it cannot be terminated
1254 * or completed again.
1256 ireq
->terminated
= true;;
1258 isci_request_change_state(ireq
, unallocated
);
1259 list_del_init(&ireq
->dev_node
);
1261 /* The task management part completes last. */
1262 complete(tmf_complete
);
1265 static void isci_smp_task_timedout(unsigned long _task
)
1267 struct sas_task
*task
= (void *) _task
;
1268 unsigned long flags
;
1270 spin_lock_irqsave(&task
->task_state_lock
, flags
);
1271 if (!(task
->task_state_flags
& SAS_TASK_STATE_DONE
))
1272 task
->task_state_flags
|= SAS_TASK_STATE_ABORTED
;
1273 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
1275 complete(&task
->completion
);
1278 static void isci_smp_task_done(struct sas_task
*task
)
1280 if (!del_timer(&task
->timer
))
1282 complete(&task
->completion
);
1285 static struct sas_task
*isci_alloc_task(void)
1287 struct sas_task
*task
= kzalloc(sizeof(*task
), GFP_KERNEL
);
1290 INIT_LIST_HEAD(&task
->list
);
1291 spin_lock_init(&task
->task_state_lock
);
1292 task
->task_state_flags
= SAS_TASK_STATE_PENDING
;
1293 init_timer(&task
->timer
);
1294 init_completion(&task
->completion
);
1300 static void isci_free_task(struct isci_host
*ihost
, struct sas_task
*task
)
1303 BUG_ON(!list_empty(&task
->list
));
1308 static int isci_smp_execute_task(struct isci_host
*ihost
,
1309 struct domain_device
*dev
, void *req
,
1310 int req_size
, void *resp
, int resp_size
)
1313 struct sas_task
*task
= NULL
;
1315 for (retry
= 0; retry
< 3; retry
++) {
1316 task
= isci_alloc_task();
1321 task
->task_proto
= dev
->tproto
;
1322 sg_init_one(&task
->smp_task
.smp_req
, req
, req_size
);
1323 sg_init_one(&task
->smp_task
.smp_resp
, resp
, resp_size
);
1325 task
->task_done
= isci_smp_task_done
;
1327 task
->timer
.data
= (unsigned long) task
;
1328 task
->timer
.function
= isci_smp_task_timedout
;
1329 task
->timer
.expires
= jiffies
+ 10*HZ
;
1330 add_timer(&task
->timer
);
1332 res
= isci_task_execute_task(task
, 1, GFP_KERNEL
);
1335 del_timer(&task
->timer
);
1336 dev_err(&ihost
->pdev
->dev
,
1337 "%s: executing SMP task failed:%d\n",
1342 wait_for_completion(&task
->completion
);
1344 if ((task
->task_state_flags
& SAS_TASK_STATE_ABORTED
)) {
1345 dev_err(&ihost
->pdev
->dev
,
1346 "%s: smp task timed out or aborted\n",
1348 isci_task_abort_task(task
);
1349 if (!(task
->task_state_flags
& SAS_TASK_STATE_DONE
)) {
1350 dev_err(&ihost
->pdev
->dev
,
1351 "%s: SMP task aborted and not done\n",
1356 if (task
->task_status
.resp
== SAS_TASK_COMPLETE
&&
1357 task
->task_status
.stat
== SAM_STAT_GOOD
) {
1361 if (task
->task_status
.resp
== SAS_TASK_COMPLETE
&&
1362 task
->task_status
.stat
== SAS_DATA_UNDERRUN
) {
1363 /* no error, but return the number of bytes of
1365 res
= task
->task_status
.residual
;
1368 if (task
->task_status
.resp
== SAS_TASK_COMPLETE
&&
1369 task
->task_status
.stat
== SAS_DATA_OVERRUN
) {
1373 dev_err(&ihost
->pdev
->dev
,
1374 "%s: task to dev %016llx response: 0x%x "
1375 "status 0x%x\n", __func__
,
1376 SAS_ADDR(dev
->sas_addr
),
1377 task
->task_status
.resp
,
1378 task
->task_status
.stat
);
1379 isci_free_task(ihost
, task
);
1384 BUG_ON(retry
== 3 && task
!= NULL
);
1385 isci_free_task(ihost
, task
);
1389 #define DISCOVER_REQ_SIZE 16
1390 #define DISCOVER_RESP_SIZE 56
1392 int isci_smp_get_phy_attached_dev_type(struct isci_host
*ihost
,
1393 struct domain_device
*dev
,
1394 int phy_id
, int *adt
)
1396 struct smp_resp
*disc_resp
;
1400 disc_resp
= kzalloc(DISCOVER_RESP_SIZE
, GFP_KERNEL
);
1404 disc_req
= kzalloc(DISCOVER_REQ_SIZE
, GFP_KERNEL
);
1406 disc_req
[0] = SMP_REQUEST
;
1407 disc_req
[1] = SMP_DISCOVER
;
1408 disc_req
[9] = phy_id
;
1413 res
= isci_smp_execute_task(ihost
, dev
, disc_req
, DISCOVER_REQ_SIZE
,
1414 disc_resp
, DISCOVER_RESP_SIZE
);
1416 if (disc_resp
->result
!= SMP_RESP_FUNC_ACC
)
1417 res
= disc_resp
->result
;
1419 *adt
= disc_resp
->disc
.attached_dev_type
;
1427 static void isci_wait_for_smp_phy_reset(struct isci_remote_device
*idev
, int phy_num
)
1429 struct domain_device
*dev
= idev
->domain_dev
;
1430 struct isci_port
*iport
= idev
->isci_port
;
1431 struct isci_host
*ihost
= iport
->isci_host
;
1432 int res
, iteration
= 0, attached_device_type
;
1433 #define STP_WAIT_MSECS 25000
1434 unsigned long tmo
= msecs_to_jiffies(STP_WAIT_MSECS
);
1435 unsigned long deadline
= jiffies
+ tmo
;
1437 SMP_PHYWAIT_PHYDOWN
,
1440 } phy_state
= SMP_PHYWAIT_PHYDOWN
;
1442 /* While there is time, wait for the phy to go away and come back */
1443 while (time_is_after_jiffies(deadline
) && phy_state
!= SMP_PHYWAIT_DONE
) {
1444 int event
= atomic_read(&iport
->event
);
1448 tmo
= wait_event_timeout(ihost
->eventq
,
1449 event
!= atomic_read(&iport
->event
) ||
1450 !test_bit(IPORT_BCN_BLOCKED
, &iport
->flags
),
1452 /* link down, stop polling */
1453 if (!test_bit(IPORT_BCN_BLOCKED
, &iport
->flags
))
1456 dev_dbg(&ihost
->pdev
->dev
,
1457 "%s: iport %p, iteration %d,"
1458 " phase %d: time_remaining %lu, bcns = %d\n",
1459 __func__
, iport
, iteration
, phy_state
,
1460 tmo
, test_bit(IPORT_BCN_PENDING
, &iport
->flags
));
1462 res
= isci_smp_get_phy_attached_dev_type(ihost
, dev
, phy_num
,
1463 &attached_device_type
);
1464 tmo
= deadline
- jiffies
;
1467 dev_warn(&ihost
->pdev
->dev
,
1468 "%s: iteration %d, phase %d:"
1469 " SMP error=%d, time_remaining=%lu\n",
1470 __func__
, iteration
, phy_state
, res
, tmo
);
1473 dev_dbg(&ihost
->pdev
->dev
,
1474 "%s: iport %p, iteration %d,"
1475 " phase %d: time_remaining %lu, bcns = %d, "
1476 "attdevtype = %x\n",
1477 __func__
, iport
, iteration
, phy_state
,
1478 tmo
, test_bit(IPORT_BCN_PENDING
, &iport
->flags
),
1479 attached_device_type
);
1481 switch (phy_state
) {
1482 case SMP_PHYWAIT_PHYDOWN
:
1483 /* Has the device gone away? */
1484 if (!attached_device_type
)
1485 phy_state
= SMP_PHYWAIT_PHYUP
;
1489 case SMP_PHYWAIT_PHYUP
:
1490 /* Has the device come back? */
1491 if (attached_device_type
)
1492 phy_state
= SMP_PHYWAIT_DONE
;
1495 case SMP_PHYWAIT_DONE
:
1500 dev_dbg(&ihost
->pdev
->dev
, "%s: done\n", __func__
);
1503 static int isci_reset_device(struct isci_host
*ihost
,
1504 struct isci_remote_device
*idev
, int hard_reset
)
1506 struct sas_phy
*phy
= sas_find_local_phy(idev
->domain_dev
);
1507 struct isci_port
*iport
= idev
->isci_port
;
1508 enum sci_status status
;
1509 unsigned long flags
;
1512 dev_dbg(&ihost
->pdev
->dev
, "%s: idev %p\n", __func__
, idev
);
1514 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1515 status
= scic_remote_device_reset(&idev
->sci
);
1516 if (status
!= SCI_SUCCESS
) {
1517 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1519 dev_warn(&ihost
->pdev
->dev
,
1520 "%s: scic_remote_device_reset(%p) returned %d!\n",
1521 __func__
, idev
, status
);
1523 return TMF_RESP_FUNC_FAILED
;
1525 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1527 /* Make sure all pending requests are able to be fully terminated. */
1528 isci_device_clear_reset_pending(ihost
, idev
);
1530 /* If this is a device on an expander, disable BCN processing. */
1531 if (!scsi_is_sas_phy_local(phy
))
1532 set_bit(IPORT_BCN_BLOCKED
, &iport
->flags
);
1534 rc
= sas_phy_reset(phy
, hard_reset
);
1536 /* Terminate in-progress I/O now. */
1537 isci_remote_device_nuke_requests(ihost
, idev
);
1539 /* Since all pending TCs have been cleaned, resume the RNC. */
1540 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1541 status
= scic_remote_device_reset_complete(&idev
->sci
);
1542 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1544 /* If this is a device on an expander, bring the phy back up. */
1545 if (!scsi_is_sas_phy_local(phy
)) {
1546 /* A phy reset will cause the device to go away then reappear.
1547 * Since libsas will take action on incoming BCNs (eg. remove
1548 * a device going through an SMP phy-control driven reset),
1549 * we need to wait until the phy comes back up before letting
1550 * discovery proceed in libsas.
1552 isci_wait_for_smp_phy_reset(idev
, phy
->number
);
1554 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1555 isci_port_bcn_enable(ihost
, idev
->isci_port
);
1556 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1559 if (status
!= SCI_SUCCESS
) {
1560 dev_warn(&ihost
->pdev
->dev
,
1561 "%s: scic_remote_device_reset_complete(%p) "
1562 "returned %d!\n", __func__
, idev
, status
);
1565 dev_dbg(&ihost
->pdev
->dev
, "%s: idev %p complete.\n", __func__
, idev
);
1570 int isci_task_I_T_nexus_reset(struct domain_device
*dev
)
1572 struct isci_host
*ihost
= dev_to_ihost(dev
);
1573 struct isci_remote_device
*idev
;
1574 int ret
, hard_reset
= 1;
1575 unsigned long flags
;
1577 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1578 idev
= isci_lookup_device(dev
);
1579 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1581 if (!idev
|| !test_bit(IDEV_EH
, &idev
->flags
)) {
1582 ret
= TMF_RESP_FUNC_COMPLETE
;
1586 if (dev
->dev_type
== SATA_DEV
|| (dev
->tproto
& SAS_PROTOCOL_STP
))
1589 ret
= isci_reset_device(ihost
, idev
, hard_reset
);
1591 isci_put_device(idev
);
1595 int isci_bus_reset_handler(struct scsi_cmnd
*cmd
)
1597 struct domain_device
*dev
= sdev_to_domain_dev(cmd
->device
);
1598 struct isci_host
*ihost
= dev_to_ihost(dev
);
1599 struct isci_remote_device
*idev
;
1600 int ret
, hard_reset
= 1;
1601 unsigned long flags
;
1603 if (dev
->dev_type
== SATA_DEV
|| (dev
->tproto
& SAS_PROTOCOL_STP
))
1606 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1607 idev
= isci_lookup_device(dev
);
1608 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1611 ret
= TMF_RESP_FUNC_COMPLETE
;
1615 ret
= isci_reset_device(ihost
, idev
, hard_reset
);
1617 isci_put_device(idev
);