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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53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
58 #include "remote_device.h"
60 #include "remote_node_context.h"
61 #include "scu_event_codes.h"
65 * isci_remote_device_not_ready() - This function is called by the scic when
66 * the remote device is not ready. We mark the isci device as ready (not
67 * "ready_for_io") and signal the waiting proccess.
68 * @isci_host: This parameter specifies the isci host object.
69 * @isci_device: This parameter specifies the remote device
71 * scic_lock is held on entrance to this function.
73 static void isci_remote_device_not_ready(struct isci_host
*ihost
,
74 struct isci_remote_device
*idev
, u32 reason
)
76 struct isci_request
* ireq
;
78 dev_dbg(&ihost
->pdev
->dev
,
79 "%s: isci_device = %p\n", __func__
, idev
);
82 case SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED
:
83 set_bit(IDEV_GONE
, &idev
->flags
);
85 case SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
:
86 set_bit(IDEV_IO_NCQERROR
, &idev
->flags
);
88 /* Kill all outstanding requests for the device. */
89 list_for_each_entry(ireq
, &idev
->reqs_in_process
, dev_node
) {
91 dev_dbg(&ihost
->pdev
->dev
,
92 "%s: isci_device = %p request = %p\n",
93 __func__
, idev
, ireq
);
95 scic_controller_terminate_request(&ihost
->sci
,
99 /* Fall through into the default case... */
101 clear_bit(IDEV_IO_READY
, &idev
->flags
);
107 * isci_remote_device_ready() - This function is called by the scic when the
108 * remote device is ready. We mark the isci device as ready and signal the
110 * @ihost: our valid isci_host
111 * @idev: remote device
114 static void isci_remote_device_ready(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
116 dev_dbg(&ihost
->pdev
->dev
,
117 "%s: idev = %p\n", __func__
, idev
);
119 clear_bit(IDEV_IO_NCQERROR
, &idev
->flags
);
120 set_bit(IDEV_IO_READY
, &idev
->flags
);
121 if (test_and_clear_bit(IDEV_START_PENDING
, &idev
->flags
))
122 wake_up(&ihost
->eventq
);
125 /* called once the remote node context is ready to be freed.
126 * The remote device can now report that its stop operation is complete. none
128 static void rnc_destruct_done(void *_dev
)
130 struct scic_sds_remote_device
*sci_dev
= _dev
;
132 BUG_ON(sci_dev
->started_request_count
!= 0);
133 sci_change_state(&sci_dev
->sm
, SCI_DEV_STOPPED
);
136 static enum sci_status
scic_sds_remote_device_terminate_requests(struct scic_sds_remote_device
*sci_dev
)
138 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
139 u32 i
, request_count
= sci_dev
->started_request_count
;
140 enum sci_status status
= SCI_SUCCESS
;
142 for (i
= 0; i
< SCI_MAX_IO_REQUESTS
&& i
< request_count
; i
++) {
143 struct scic_sds_request
*sci_req
;
146 sci_req
= scic
->io_request_table
[i
];
147 if (!sci_req
|| sci_req
->target_device
!= sci_dev
)
149 s
= scic_controller_terminate_request(scic
, sci_dev
, sci_req
);
150 if (s
!= SCI_SUCCESS
)
157 enum sci_status
scic_remote_device_stop(struct scic_sds_remote_device
*sci_dev
,
160 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
161 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
164 case SCI_DEV_INITIAL
:
168 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
170 return SCI_FAILURE_INVALID_STATE
;
171 case SCI_DEV_STOPPED
:
173 case SCI_DEV_STARTING
:
174 /* device not started so there had better be no requests */
175 BUG_ON(sci_dev
->started_request_count
!= 0);
176 scic_sds_remote_node_context_destruct(&sci_dev
->rnc
,
177 rnc_destruct_done
, sci_dev
);
178 /* Transition to the stopping state and wait for the
179 * remote node to complete being posted and invalidated.
181 sci_change_state(sm
, SCI_DEV_STOPPING
);
184 case SCI_STP_DEV_IDLE
:
185 case SCI_STP_DEV_CMD
:
186 case SCI_STP_DEV_NCQ
:
187 case SCI_STP_DEV_NCQ_ERROR
:
188 case SCI_STP_DEV_AWAIT_RESET
:
189 case SCI_SMP_DEV_IDLE
:
190 case SCI_SMP_DEV_CMD
:
191 sci_change_state(sm
, SCI_DEV_STOPPING
);
192 if (sci_dev
->started_request_count
== 0) {
193 scic_sds_remote_node_context_destruct(&sci_dev
->rnc
,
194 rnc_destruct_done
, sci_dev
);
197 return scic_sds_remote_device_terminate_requests(sci_dev
);
199 case SCI_DEV_STOPPING
:
200 /* All requests should have been terminated, but if there is an
201 * attempt to stop a device already in the stopping state, then
202 * try again to terminate.
204 return scic_sds_remote_device_terminate_requests(sci_dev
);
205 case SCI_DEV_RESETTING
:
206 sci_change_state(sm
, SCI_DEV_STOPPING
);
211 enum sci_status
scic_remote_device_reset(struct scic_sds_remote_device
*sci_dev
)
213 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
214 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
217 case SCI_DEV_INITIAL
:
218 case SCI_DEV_STOPPED
:
219 case SCI_DEV_STARTING
:
220 case SCI_SMP_DEV_IDLE
:
221 case SCI_SMP_DEV_CMD
:
222 case SCI_DEV_STOPPING
:
224 case SCI_DEV_RESETTING
:
227 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
229 return SCI_FAILURE_INVALID_STATE
;
231 case SCI_STP_DEV_IDLE
:
232 case SCI_STP_DEV_CMD
:
233 case SCI_STP_DEV_NCQ
:
234 case SCI_STP_DEV_NCQ_ERROR
:
235 case SCI_STP_DEV_AWAIT_RESET
:
236 sci_change_state(sm
, SCI_DEV_RESETTING
);
241 enum sci_status
scic_remote_device_reset_complete(struct scic_sds_remote_device
*sci_dev
)
243 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
244 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
246 if (state
!= SCI_DEV_RESETTING
) {
247 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
249 return SCI_FAILURE_INVALID_STATE
;
252 sci_change_state(sm
, SCI_DEV_READY
);
256 enum sci_status
scic_sds_remote_device_suspend(struct scic_sds_remote_device
*sci_dev
,
259 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
260 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
262 if (state
!= SCI_STP_DEV_CMD
) {
263 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
265 return SCI_FAILURE_INVALID_STATE
;
268 return scic_sds_remote_node_context_suspend(&sci_dev
->rnc
,
269 suspend_type
, NULL
, NULL
);
272 enum sci_status
scic_sds_remote_device_frame_handler(struct scic_sds_remote_device
*sci_dev
,
275 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
276 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
277 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
278 enum sci_status status
;
281 case SCI_DEV_INITIAL
:
282 case SCI_DEV_STOPPED
:
283 case SCI_DEV_STARTING
:
284 case SCI_STP_DEV_IDLE
:
285 case SCI_SMP_DEV_IDLE
:
288 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
290 /* Return the frame back to the controller */
291 scic_sds_controller_release_frame(scic
, frame_index
);
292 return SCI_FAILURE_INVALID_STATE
;
294 case SCI_STP_DEV_NCQ_ERROR
:
295 case SCI_STP_DEV_AWAIT_RESET
:
296 case SCI_DEV_STOPPING
:
298 case SCI_DEV_RESETTING
: {
299 struct scic_sds_request
*sci_req
;
300 struct ssp_frame_hdr hdr
;
304 status
= scic_sds_unsolicited_frame_control_get_header(&scic
->uf_control
,
307 if (status
!= SCI_SUCCESS
)
310 word_cnt
= sizeof(hdr
) / sizeof(u32
);
311 sci_swab32_cpy(&hdr
, frame_header
, word_cnt
);
313 sci_req
= scic_request_by_tag(scic
, be16_to_cpu(hdr
.tag
));
314 if (sci_req
&& sci_req
->target_device
== sci_dev
) {
315 /* The IO request is now in charge of releasing the frame */
316 status
= scic_sds_io_request_frame_handler(sci_req
, frame_index
);
318 /* We could not map this tag to a valid IO
319 * request Just toss the frame and continue
321 scic_sds_controller_release_frame(scic
, frame_index
);
325 case SCI_STP_DEV_NCQ
: {
326 struct dev_to_host_fis
*hdr
;
328 status
= scic_sds_unsolicited_frame_control_get_header(&scic
->uf_control
,
331 if (status
!= SCI_SUCCESS
)
334 if (hdr
->fis_type
== FIS_SETDEVBITS
&&
335 (hdr
->status
& ATA_ERR
)) {
336 sci_dev
->not_ready_reason
= SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
;
338 /* TODO Check sactive and complete associated IO if any. */
339 sci_change_state(sm
, SCI_STP_DEV_NCQ_ERROR
);
340 } else if (hdr
->fis_type
== FIS_REGD2H
&&
341 (hdr
->status
& ATA_ERR
)) {
343 * Some devices return D2H FIS when an NCQ error is detected.
344 * Treat this like an SDB error FIS ready reason.
346 sci_dev
->not_ready_reason
= SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
;
347 sci_change_state(&sci_dev
->sm
, SCI_STP_DEV_NCQ_ERROR
);
349 status
= SCI_FAILURE
;
351 scic_sds_controller_release_frame(scic
, frame_index
);
354 case SCI_STP_DEV_CMD
:
355 case SCI_SMP_DEV_CMD
:
356 /* The device does not process any UF received from the hardware while
357 * in this state. All unsolicited frames are forwarded to the io request
360 status
= scic_sds_io_request_frame_handler(sci_dev
->working_request
, frame_index
);
367 static bool is_remote_device_ready(struct scic_sds_remote_device
*sci_dev
)
370 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
371 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
375 case SCI_STP_DEV_IDLE
:
376 case SCI_STP_DEV_CMD
:
377 case SCI_STP_DEV_NCQ
:
378 case SCI_STP_DEV_NCQ_ERROR
:
379 case SCI_STP_DEV_AWAIT_RESET
:
380 case SCI_SMP_DEV_IDLE
:
381 case SCI_SMP_DEV_CMD
:
388 enum sci_status
scic_sds_remote_device_event_handler(struct scic_sds_remote_device
*sci_dev
,
391 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
392 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
393 enum sci_status status
;
395 switch (scu_get_event_type(event_code
)) {
396 case SCU_EVENT_TYPE_RNC_OPS_MISC
:
397 case SCU_EVENT_TYPE_RNC_SUSPEND_TX
:
398 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX
:
399 status
= scic_sds_remote_node_context_event_handler(&sci_dev
->rnc
, event_code
);
401 case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT
:
402 if (scu_get_event_code(event_code
) == SCU_EVENT_IT_NEXUS_TIMEOUT
) {
403 status
= SCI_SUCCESS
;
405 /* Suspend the associated RNC */
406 scic_sds_remote_node_context_suspend(&sci_dev
->rnc
,
407 SCI_SOFTWARE_SUSPENSION
,
410 dev_dbg(scirdev_to_dev(sci_dev
),
411 "%s: device: %p event code: %x: %s\n",
412 __func__
, sci_dev
, event_code
,
413 is_remote_device_ready(sci_dev
)
414 ? "I_T_Nexus_Timeout event"
415 : "I_T_Nexus_Timeout event in wrong state");
419 /* Else, fall through and treat as unhandled... */
421 dev_dbg(scirdev_to_dev(sci_dev
),
422 "%s: device: %p event code: %x: %s\n",
423 __func__
, sci_dev
, event_code
,
424 is_remote_device_ready(sci_dev
)
426 : "unexpected event in wrong state");
427 status
= SCI_FAILURE_INVALID_STATE
;
431 if (status
!= SCI_SUCCESS
)
434 if (state
== SCI_STP_DEV_IDLE
) {
436 /* We pick up suspension events to handle specifically to this
437 * state. We resume the RNC right away.
439 if (scu_get_event_type(event_code
) == SCU_EVENT_TYPE_RNC_SUSPEND_TX
||
440 scu_get_event_type(event_code
) == SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX
)
441 status
= scic_sds_remote_node_context_resume(&sci_dev
->rnc
, NULL
, NULL
);
447 static void scic_sds_remote_device_start_request(struct scic_sds_remote_device
*sci_dev
,
448 struct scic_sds_request
*sci_req
,
449 enum sci_status status
)
451 struct scic_sds_port
*sci_port
= sci_dev
->owning_port
;
453 /* cleanup requests that failed after starting on the port */
454 if (status
!= SCI_SUCCESS
)
455 scic_sds_port_complete_io(sci_port
, sci_dev
, sci_req
);
457 kref_get(&sci_dev_to_idev(sci_dev
)->kref
);
458 scic_sds_remote_device_increment_request_count(sci_dev
);
462 enum sci_status
scic_sds_remote_device_start_io(struct scic_sds_controller
*scic
,
463 struct scic_sds_remote_device
*sci_dev
,
464 struct scic_sds_request
*sci_req
)
466 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
467 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
468 struct scic_sds_port
*sci_port
= sci_dev
->owning_port
;
469 struct isci_request
*ireq
= sci_req_to_ireq(sci_req
);
470 enum sci_status status
;
473 case SCI_DEV_INITIAL
:
474 case SCI_DEV_STOPPED
:
475 case SCI_DEV_STARTING
:
476 case SCI_STP_DEV_NCQ_ERROR
:
477 case SCI_DEV_STOPPING
:
479 case SCI_DEV_RESETTING
:
482 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
484 return SCI_FAILURE_INVALID_STATE
;
486 /* attempt to start an io request for this device object. The remote
487 * device object will issue the start request for the io and if
488 * successful it will start the request for the port object then
489 * increment its own request count.
491 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
492 if (status
!= SCI_SUCCESS
)
495 status
= scic_sds_remote_node_context_start_io(&sci_dev
->rnc
, sci_req
);
496 if (status
!= SCI_SUCCESS
)
499 status
= scic_sds_request_start(sci_req
);
501 case SCI_STP_DEV_IDLE
: {
502 /* handle the start io operation for a sata device that is in
503 * the command idle state. - Evalute the type of IO request to
504 * be started - If its an NCQ request change to NCQ substate -
505 * If its any other command change to the CMD substate
507 * If this is a softreset we may want to have a different
510 enum scic_sds_remote_device_states new_state
;
511 struct sas_task
*task
= isci_request_access_task(ireq
);
513 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
514 if (status
!= SCI_SUCCESS
)
517 status
= scic_sds_remote_node_context_start_io(&sci_dev
->rnc
, sci_req
);
518 if (status
!= SCI_SUCCESS
)
521 status
= scic_sds_request_start(sci_req
);
522 if (status
!= SCI_SUCCESS
)
525 if (task
->ata_task
.use_ncq
)
526 new_state
= SCI_STP_DEV_NCQ
;
528 sci_dev
->working_request
= sci_req
;
529 new_state
= SCI_STP_DEV_CMD
;
531 sci_change_state(sm
, new_state
);
534 case SCI_STP_DEV_NCQ
: {
535 struct sas_task
*task
= isci_request_access_task(ireq
);
537 if (task
->ata_task
.use_ncq
) {
538 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
539 if (status
!= SCI_SUCCESS
)
542 status
= scic_sds_remote_node_context_start_io(&sci_dev
->rnc
, sci_req
);
543 if (status
!= SCI_SUCCESS
)
546 status
= scic_sds_request_start(sci_req
);
548 return SCI_FAILURE_INVALID_STATE
;
551 case SCI_STP_DEV_AWAIT_RESET
:
552 return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED
;
553 case SCI_SMP_DEV_IDLE
:
554 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
555 if (status
!= SCI_SUCCESS
)
558 status
= scic_sds_remote_node_context_start_io(&sci_dev
->rnc
, sci_req
);
559 if (status
!= SCI_SUCCESS
)
562 status
= scic_sds_request_start(sci_req
);
563 if (status
!= SCI_SUCCESS
)
566 sci_dev
->working_request
= sci_req
;
567 sci_change_state(&sci_dev
->sm
, SCI_SMP_DEV_CMD
);
569 case SCI_STP_DEV_CMD
:
570 case SCI_SMP_DEV_CMD
:
571 /* device is already handling a command it can not accept new commands
572 * until this one is complete.
574 return SCI_FAILURE_INVALID_STATE
;
577 scic_sds_remote_device_start_request(sci_dev
, sci_req
, status
);
581 static enum sci_status
common_complete_io(struct scic_sds_port
*sci_port
,
582 struct scic_sds_remote_device
*sci_dev
,
583 struct scic_sds_request
*sci_req
)
585 enum sci_status status
;
587 status
= scic_sds_request_complete(sci_req
);
588 if (status
!= SCI_SUCCESS
)
591 status
= scic_sds_port_complete_io(sci_port
, sci_dev
, sci_req
);
592 if (status
!= SCI_SUCCESS
)
595 scic_sds_remote_device_decrement_request_count(sci_dev
);
599 enum sci_status
scic_sds_remote_device_complete_io(struct scic_sds_controller
*scic
,
600 struct scic_sds_remote_device
*sci_dev
,
601 struct scic_sds_request
*sci_req
)
603 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
604 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
605 struct scic_sds_port
*sci_port
= sci_dev
->owning_port
;
606 enum sci_status status
;
609 case SCI_DEV_INITIAL
:
610 case SCI_DEV_STOPPED
:
611 case SCI_DEV_STARTING
:
612 case SCI_STP_DEV_IDLE
:
613 case SCI_SMP_DEV_IDLE
:
617 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
619 return SCI_FAILURE_INVALID_STATE
;
621 case SCI_STP_DEV_AWAIT_RESET
:
622 case SCI_DEV_RESETTING
:
623 status
= common_complete_io(sci_port
, sci_dev
, sci_req
);
625 case SCI_STP_DEV_CMD
:
626 case SCI_STP_DEV_NCQ
:
627 case SCI_STP_DEV_NCQ_ERROR
:
628 status
= common_complete_io(sci_port
, sci_dev
, sci_req
);
629 if (status
!= SCI_SUCCESS
)
632 if (sci_req
->sci_status
== SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED
) {
633 /* This request causes hardware error, device needs to be Lun Reset.
634 * So here we force the state machine to IDLE state so the rest IOs
635 * can reach RNC state handler, these IOs will be completed by RNC with
636 * status of "DEVICE_RESET_REQUIRED", instead of "INVALID STATE".
638 sci_change_state(sm
, SCI_STP_DEV_AWAIT_RESET
);
639 } else if (scic_sds_remote_device_get_request_count(sci_dev
) == 0)
640 sci_change_state(sm
, SCI_STP_DEV_IDLE
);
642 case SCI_SMP_DEV_CMD
:
643 status
= common_complete_io(sci_port
, sci_dev
, sci_req
);
644 if (status
!= SCI_SUCCESS
)
646 sci_change_state(sm
, SCI_SMP_DEV_IDLE
);
648 case SCI_DEV_STOPPING
:
649 status
= common_complete_io(sci_port
, sci_dev
, sci_req
);
650 if (status
!= SCI_SUCCESS
)
653 if (scic_sds_remote_device_get_request_count(sci_dev
) == 0)
654 scic_sds_remote_node_context_destruct(&sci_dev
->rnc
,
660 if (status
!= SCI_SUCCESS
)
661 dev_err(scirdev_to_dev(sci_dev
),
662 "%s: Port:0x%p Device:0x%p Request:0x%p Status:0x%x "
663 "could not complete\n", __func__
, sci_port
,
664 sci_dev
, sci_req
, status
);
666 isci_put_device(sci_dev_to_idev(sci_dev
));
671 static void scic_sds_remote_device_continue_request(void *dev
)
673 struct scic_sds_remote_device
*sci_dev
= dev
;
675 /* we need to check if this request is still valid to continue. */
676 if (sci_dev
->working_request
)
677 scic_controller_continue_io(sci_dev
->working_request
);
680 enum sci_status
scic_sds_remote_device_start_task(struct scic_sds_controller
*scic
,
681 struct scic_sds_remote_device
*sci_dev
,
682 struct scic_sds_request
*sci_req
)
684 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
685 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
686 struct scic_sds_port
*sci_port
= sci_dev
->owning_port
;
687 enum sci_status status
;
690 case SCI_DEV_INITIAL
:
691 case SCI_DEV_STOPPED
:
692 case SCI_DEV_STARTING
:
693 case SCI_SMP_DEV_IDLE
:
694 case SCI_SMP_DEV_CMD
:
695 case SCI_DEV_STOPPING
:
697 case SCI_DEV_RESETTING
:
700 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
702 return SCI_FAILURE_INVALID_STATE
;
703 case SCI_STP_DEV_IDLE
:
704 case SCI_STP_DEV_CMD
:
705 case SCI_STP_DEV_NCQ
:
706 case SCI_STP_DEV_NCQ_ERROR
:
707 case SCI_STP_DEV_AWAIT_RESET
:
708 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
709 if (status
!= SCI_SUCCESS
)
712 status
= scic_sds_remote_node_context_start_task(&sci_dev
->rnc
, sci_req
);
713 if (status
!= SCI_SUCCESS
)
716 status
= scic_sds_request_start(sci_req
);
717 if (status
!= SCI_SUCCESS
)
720 /* Note: If the remote device state is not IDLE this will
721 * replace the request that probably resulted in the task
722 * management request.
724 sci_dev
->working_request
= sci_req
;
725 sci_change_state(sm
, SCI_STP_DEV_CMD
);
727 /* The remote node context must cleanup the TCi to NCQ mapping
728 * table. The only way to do this correctly is to either write
729 * to the TLCR register or to invalidate and repost the RNC. In
730 * either case the remote node context state machine will take
731 * the correct action when the remote node context is suspended
734 scic_sds_remote_node_context_suspend(&sci_dev
->rnc
,
735 SCI_SOFTWARE_SUSPENSION
, NULL
, NULL
);
736 scic_sds_remote_node_context_resume(&sci_dev
->rnc
,
737 scic_sds_remote_device_continue_request
,
741 scic_sds_remote_device_start_request(sci_dev
, sci_req
, status
);
742 /* We need to let the controller start request handler know that
743 * it can't post TC yet. We will provide a callback function to
744 * post TC when RNC gets resumed.
746 return SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS
;
748 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
749 if (status
!= SCI_SUCCESS
)
752 status
= scic_sds_remote_node_context_start_task(&sci_dev
->rnc
, sci_req
);
753 if (status
!= SCI_SUCCESS
)
756 status
= scic_sds_request_start(sci_req
);
759 scic_sds_remote_device_start_request(sci_dev
, sci_req
, status
);
769 * This method takes the request and bulids an appropriate SCU context for the
770 * request and then requests the controller to post the request. none
772 void scic_sds_remote_device_post_request(
773 struct scic_sds_remote_device
*sci_dev
,
778 context
= scic_sds_remote_device_build_command_context(sci_dev
, request
);
780 scic_sds_controller_post_request(
781 scic_sds_remote_device_get_controller(sci_dev
),
786 /* called once the remote node context has transisitioned to a
787 * ready state. This is the indication that the remote device object can also
788 * transition to ready.
790 static void remote_device_resume_done(void *_dev
)
792 struct scic_sds_remote_device
*sci_dev
= _dev
;
794 if (is_remote_device_ready(sci_dev
))
797 /* go 'ready' if we are not already in a ready state */
798 sci_change_state(&sci_dev
->sm
, SCI_DEV_READY
);
801 static void scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handler(void *_dev
)
803 struct scic_sds_remote_device
*sci_dev
= _dev
;
804 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
805 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
807 /* For NCQ operation we do not issue a isci_remote_device_not_ready().
808 * As a result, avoid sending the ready notification.
810 if (sci_dev
->sm
.previous_state_id
!= SCI_STP_DEV_NCQ
)
811 isci_remote_device_ready(scic_to_ihost(scic
), idev
);
814 static void scic_sds_remote_device_initial_state_enter(struct sci_base_state_machine
*sm
)
816 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
818 /* Initial state is a transitional state to the stopped state */
819 sci_change_state(&sci_dev
->sm
, SCI_DEV_STOPPED
);
823 * scic_remote_device_destruct() - free remote node context and destruct
824 * @remote_device: This parameter specifies the remote device to be destructed.
826 * Remote device objects are a limited resource. As such, they must be
827 * protected. Thus calls to construct and destruct are mutually exclusive and
828 * non-reentrant. The return value shall indicate if the device was
829 * successfully destructed or if some failure occurred. enum sci_status This value
830 * is returned if the device is successfully destructed.
831 * SCI_FAILURE_INVALID_REMOTE_DEVICE This value is returned if the supplied
832 * device isn't valid (e.g. it's already been destoryed, the handle isn't
835 static enum sci_status
scic_remote_device_destruct(struct scic_sds_remote_device
*sci_dev
)
837 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
838 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
839 struct scic_sds_controller
*scic
;
841 if (state
!= SCI_DEV_STOPPED
) {
842 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
844 return SCI_FAILURE_INVALID_STATE
;
847 scic
= sci_dev
->owning_port
->owning_controller
;
848 scic_sds_controller_free_remote_node_context(scic
, sci_dev
,
849 sci_dev
->rnc
.remote_node_index
);
850 sci_dev
->rnc
.remote_node_index
= SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX
;
851 sci_change_state(sm
, SCI_DEV_FINAL
);
857 * isci_remote_device_deconstruct() - This function frees an isci_remote_device.
858 * @ihost: This parameter specifies the isci host object.
859 * @idev: This parameter specifies the remote device to be freed.
862 static void isci_remote_device_deconstruct(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
864 dev_dbg(&ihost
->pdev
->dev
,
865 "%s: isci_device = %p\n", __func__
, idev
);
867 /* There should not be any outstanding io's. All paths to
868 * here should go through isci_remote_device_nuke_requests.
869 * If we hit this condition, we will need a way to complete
870 * io requests in process */
871 BUG_ON(!list_empty(&idev
->reqs_in_process
));
873 scic_remote_device_destruct(&idev
->sci
);
874 list_del_init(&idev
->node
);
875 isci_put_device(idev
);
878 static void scic_sds_remote_device_stopped_state_enter(struct sci_base_state_machine
*sm
)
880 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
881 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
882 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
885 /* If we are entering from the stopping state let the SCI User know that
886 * the stop operation has completed.
888 prev_state
= sci_dev
->sm
.previous_state_id
;
889 if (prev_state
== SCI_DEV_STOPPING
)
890 isci_remote_device_deconstruct(scic_to_ihost(scic
), idev
);
892 scic_sds_controller_remote_device_stopped(scic
, sci_dev
);
895 static void scic_sds_remote_device_starting_state_enter(struct sci_base_state_machine
*sm
)
897 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
898 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
899 struct isci_host
*ihost
= scic_to_ihost(scic
);
900 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
902 isci_remote_device_not_ready(ihost
, idev
,
903 SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED
);
906 static void scic_sds_remote_device_ready_state_enter(struct sci_base_state_machine
*sm
)
908 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
909 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
910 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
911 struct domain_device
*dev
= idev
->domain_dev
;
913 if (dev
->dev_type
== SATA_DEV
|| (dev
->tproto
& SAS_PROTOCOL_SATA
)) {
914 sci_change_state(&sci_dev
->sm
, SCI_STP_DEV_IDLE
);
915 } else if (dev_is_expander(dev
)) {
916 sci_change_state(&sci_dev
->sm
, SCI_SMP_DEV_IDLE
);
918 isci_remote_device_ready(scic_to_ihost(scic
), idev
);
921 static void scic_sds_remote_device_ready_state_exit(struct sci_base_state_machine
*sm
)
923 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
924 struct domain_device
*dev
= sci_dev_to_domain(sci_dev
);
926 if (dev
->dev_type
== SAS_END_DEV
) {
927 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
928 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
930 isci_remote_device_not_ready(scic_to_ihost(scic
), idev
,
931 SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED
);
935 static void scic_sds_remote_device_resetting_state_enter(struct sci_base_state_machine
*sm
)
937 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
939 scic_sds_remote_node_context_suspend(
940 &sci_dev
->rnc
, SCI_SOFTWARE_SUSPENSION
, NULL
, NULL
);
943 static void scic_sds_remote_device_resetting_state_exit(struct sci_base_state_machine
*sm
)
945 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
947 scic_sds_remote_node_context_resume(&sci_dev
->rnc
, NULL
, NULL
);
950 static void scic_sds_stp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine
*sm
)
952 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
954 sci_dev
->working_request
= NULL
;
955 if (scic_sds_remote_node_context_is_ready(&sci_dev
->rnc
)) {
957 * Since the RNC is ready, it's alright to finish completion
958 * processing (e.g. signal the remote device is ready). */
959 scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handler(sci_dev
);
961 scic_sds_remote_node_context_resume(&sci_dev
->rnc
,
962 scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handler
,
967 static void scic_sds_stp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine
*sm
)
969 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
970 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
972 BUG_ON(sci_dev
->working_request
== NULL
);
974 isci_remote_device_not_ready(scic_to_ihost(scic
), sci_dev_to_idev(sci_dev
),
975 SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED
);
978 static void scic_sds_stp_remote_device_ready_ncq_error_substate_enter(struct sci_base_state_machine
*sm
)
980 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
981 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
982 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
984 if (sci_dev
->not_ready_reason
== SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
)
985 isci_remote_device_not_ready(scic_to_ihost(scic
), idev
,
986 sci_dev
->not_ready_reason
);
989 static void scic_sds_smp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine
*sm
)
991 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
992 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
994 isci_remote_device_ready(scic_to_ihost(scic
), sci_dev_to_idev(sci_dev
));
997 static void scic_sds_smp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine
*sm
)
999 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
1000 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
1002 BUG_ON(sci_dev
->working_request
== NULL
);
1004 isci_remote_device_not_ready(scic_to_ihost(scic
), sci_dev_to_idev(sci_dev
),
1005 SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED
);
1008 static void scic_sds_smp_remote_device_ready_cmd_substate_exit(struct sci_base_state_machine
*sm
)
1010 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
1012 sci_dev
->working_request
= NULL
;
1015 static const struct sci_base_state scic_sds_remote_device_state_table
[] = {
1016 [SCI_DEV_INITIAL
] = {
1017 .enter_state
= scic_sds_remote_device_initial_state_enter
,
1019 [SCI_DEV_STOPPED
] = {
1020 .enter_state
= scic_sds_remote_device_stopped_state_enter
,
1022 [SCI_DEV_STARTING
] = {
1023 .enter_state
= scic_sds_remote_device_starting_state_enter
,
1026 .enter_state
= scic_sds_remote_device_ready_state_enter
,
1027 .exit_state
= scic_sds_remote_device_ready_state_exit
1029 [SCI_STP_DEV_IDLE
] = {
1030 .enter_state
= scic_sds_stp_remote_device_ready_idle_substate_enter
,
1032 [SCI_STP_DEV_CMD
] = {
1033 .enter_state
= scic_sds_stp_remote_device_ready_cmd_substate_enter
,
1035 [SCI_STP_DEV_NCQ
] = { },
1036 [SCI_STP_DEV_NCQ_ERROR
] = {
1037 .enter_state
= scic_sds_stp_remote_device_ready_ncq_error_substate_enter
,
1039 [SCI_STP_DEV_AWAIT_RESET
] = { },
1040 [SCI_SMP_DEV_IDLE
] = {
1041 .enter_state
= scic_sds_smp_remote_device_ready_idle_substate_enter
,
1043 [SCI_SMP_DEV_CMD
] = {
1044 .enter_state
= scic_sds_smp_remote_device_ready_cmd_substate_enter
,
1045 .exit_state
= scic_sds_smp_remote_device_ready_cmd_substate_exit
,
1047 [SCI_DEV_STOPPING
] = { },
1048 [SCI_DEV_FAILED
] = { },
1049 [SCI_DEV_RESETTING
] = {
1050 .enter_state
= scic_sds_remote_device_resetting_state_enter
,
1051 .exit_state
= scic_sds_remote_device_resetting_state_exit
1053 [SCI_DEV_FINAL
] = { },
1057 * scic_remote_device_construct() - common construction
1058 * @sci_port: SAS/SATA port through which this device is accessed.
1059 * @sci_dev: remote device to construct
1061 * This routine just performs benign initialization and does not
1062 * allocate the remote_node_context which is left to
1063 * scic_remote_device_[de]a_construct(). scic_remote_device_destruct()
1064 * frees the remote_node_context(s) for the device.
1066 static void scic_remote_device_construct(struct scic_sds_port
*sci_port
,
1067 struct scic_sds_remote_device
*sci_dev
)
1069 sci_dev
->owning_port
= sci_port
;
1070 sci_dev
->started_request_count
= 0;
1072 sci_init_sm(&sci_dev
->sm
, scic_sds_remote_device_state_table
, SCI_DEV_INITIAL
);
1074 scic_sds_remote_node_context_construct(&sci_dev
->rnc
,
1075 SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX
);
1079 * scic_remote_device_da_construct() - construct direct attached device.
1081 * The information (e.g. IAF, Signature FIS, etc.) necessary to build
1082 * the device is known to the SCI Core since it is contained in the
1083 * scic_phy object. Remote node context(s) is/are a global resource
1084 * allocated by this routine, freed by scic_remote_device_destruct().
1087 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1088 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1089 * sata-only controller instance.
1090 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
1092 static enum sci_status
scic_remote_device_da_construct(struct scic_sds_port
*sci_port
,
1093 struct scic_sds_remote_device
*sci_dev
)
1095 enum sci_status status
;
1096 struct domain_device
*dev
= sci_dev_to_domain(sci_dev
);
1098 scic_remote_device_construct(sci_port
, sci_dev
);
1101 * This information is request to determine how many remote node context
1102 * entries will be needed to store the remote node.
1104 sci_dev
->is_direct_attached
= true;
1105 status
= scic_sds_controller_allocate_remote_node_context(sci_port
->owning_controller
,
1107 &sci_dev
->rnc
.remote_node_index
);
1109 if (status
!= SCI_SUCCESS
)
1112 if (dev
->dev_type
== SAS_END_DEV
|| dev
->dev_type
== SATA_DEV
||
1113 (dev
->tproto
& SAS_PROTOCOL_STP
) || dev_is_expander(dev
))
1116 return SCI_FAILURE_UNSUPPORTED_PROTOCOL
;
1118 sci_dev
->connection_rate
= scic_sds_port_get_max_allowed_speed(sci_port
);
1120 /* / @todo Should I assign the port width by reading all of the phys on the port? */
1121 sci_dev
->device_port_width
= 1;
1127 * scic_remote_device_ea_construct() - construct expander attached device
1129 * Remote node context(s) is/are a global resource allocated by this
1130 * routine, freed by scic_remote_device_destruct().
1133 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1134 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1135 * sata-only controller instance.
1136 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
1138 static enum sci_status
scic_remote_device_ea_construct(struct scic_sds_port
*sci_port
,
1139 struct scic_sds_remote_device
*sci_dev
)
1141 struct domain_device
*dev
= sci_dev_to_domain(sci_dev
);
1142 enum sci_status status
;
1144 scic_remote_device_construct(sci_port
, sci_dev
);
1146 status
= scic_sds_controller_allocate_remote_node_context(sci_port
->owning_controller
,
1148 &sci_dev
->rnc
.remote_node_index
);
1149 if (status
!= SCI_SUCCESS
)
1152 if (dev
->dev_type
== SAS_END_DEV
|| dev
->dev_type
== SATA_DEV
||
1153 (dev
->tproto
& SAS_PROTOCOL_STP
) || dev_is_expander(dev
))
1156 return SCI_FAILURE_UNSUPPORTED_PROTOCOL
;
1159 * For SAS-2 the physical link rate is actually a logical link
1160 * rate that incorporates multiplexing. The SCU doesn't
1161 * incorporate multiplexing and for the purposes of the
1162 * connection the logical link rate is that same as the
1163 * physical. Furthermore, the SAS-2 and SAS-1.1 fields overlay
1164 * one another, so this code works for both situations. */
1165 sci_dev
->connection_rate
= min_t(u16
, scic_sds_port_get_max_allowed_speed(sci_port
),
1168 /* / @todo Should I assign the port width by reading all of the phys on the port? */
1169 sci_dev
->device_port_width
= 1;
1175 * scic_remote_device_start() - This method will start the supplied remote
1176 * device. This method enables normal IO requests to flow through to the
1178 * @remote_device: This parameter specifies the device to be started.
1179 * @timeout: This parameter specifies the number of milliseconds in which the
1180 * start operation should complete.
1182 * An indication of whether the device was successfully started. SCI_SUCCESS
1183 * This value is returned if the device was successfully started.
1184 * SCI_FAILURE_INVALID_PHY This value is returned if the user attempts to start
1185 * the device when there have been no phys added to it.
1187 static enum sci_status
scic_remote_device_start(struct scic_sds_remote_device
*sci_dev
,
1190 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
1191 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
1192 enum sci_status status
;
1194 if (state
!= SCI_DEV_STOPPED
) {
1195 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
1197 return SCI_FAILURE_INVALID_STATE
;
1200 status
= scic_sds_remote_node_context_resume(&sci_dev
->rnc
,
1201 remote_device_resume_done
,
1203 if (status
!= SCI_SUCCESS
)
1206 sci_change_state(sm
, SCI_DEV_STARTING
);
1211 static enum sci_status
isci_remote_device_construct(struct isci_port
*iport
,
1212 struct isci_remote_device
*idev
)
1214 struct scic_sds_port
*sci_port
= &iport
->sci
;
1215 struct isci_host
*ihost
= iport
->isci_host
;
1216 struct domain_device
*dev
= idev
->domain_dev
;
1217 enum sci_status status
;
1219 if (dev
->parent
&& dev_is_expander(dev
->parent
))
1220 status
= scic_remote_device_ea_construct(sci_port
, &idev
->sci
);
1222 status
= scic_remote_device_da_construct(sci_port
, &idev
->sci
);
1224 if (status
!= SCI_SUCCESS
) {
1225 dev_dbg(&ihost
->pdev
->dev
, "%s: construct failed: %d\n",
1231 /* start the device. */
1232 status
= scic_remote_device_start(&idev
->sci
, ISCI_REMOTE_DEVICE_START_TIMEOUT
);
1234 if (status
!= SCI_SUCCESS
)
1235 dev_warn(&ihost
->pdev
->dev
, "remote device start failed: %d\n",
1241 void isci_remote_device_nuke_requests(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
1243 DECLARE_COMPLETION_ONSTACK(aborted_task_completion
);
1245 dev_dbg(&ihost
->pdev
->dev
,
1246 "%s: idev = %p\n", __func__
, idev
);
1248 /* Cleanup all requests pending for this device. */
1249 isci_terminate_pending_requests(ihost
, idev
);
1251 dev_dbg(&ihost
->pdev
->dev
,
1252 "%s: idev = %p, done\n", __func__
, idev
);
1256 * This function builds the isci_remote_device when a libsas dev_found message
1258 * @isci_host: This parameter specifies the isci host object.
1259 * @port: This parameter specifies the isci_port conected to this device.
1261 * pointer to new isci_remote_device.
1263 static struct isci_remote_device
*
1264 isci_remote_device_alloc(struct isci_host
*ihost
, struct isci_port
*iport
)
1266 struct isci_remote_device
*idev
;
1269 for (i
= 0; i
< SCI_MAX_REMOTE_DEVICES
; i
++) {
1270 idev
= &ihost
->devices
[i
];
1271 if (!test_and_set_bit(IDEV_ALLOCATED
, &idev
->flags
))
1275 if (i
>= SCI_MAX_REMOTE_DEVICES
) {
1276 dev_warn(&ihost
->pdev
->dev
, "%s: failed\n", __func__
);
1280 if (WARN_ONCE(!list_empty(&idev
->reqs_in_process
), "found requests in process\n"))
1283 if (WARN_ONCE(!list_empty(&idev
->node
), "found non-idle remote device\n"))
1289 void isci_remote_device_release(struct kref
*kref
)
1291 struct isci_remote_device
*idev
= container_of(kref
, typeof(*idev
), kref
);
1292 struct isci_host
*ihost
= idev
->isci_port
->isci_host
;
1294 idev
->domain_dev
= NULL
;
1295 idev
->isci_port
= NULL
;
1296 clear_bit(IDEV_START_PENDING
, &idev
->flags
);
1297 clear_bit(IDEV_STOP_PENDING
, &idev
->flags
);
1298 clear_bit(IDEV_IO_READY
, &idev
->flags
);
1299 clear_bit(IDEV_GONE
, &idev
->flags
);
1300 clear_bit(IDEV_EH
, &idev
->flags
);
1301 smp_mb__before_clear_bit();
1302 clear_bit(IDEV_ALLOCATED
, &idev
->flags
);
1303 wake_up(&ihost
->eventq
);
1307 * isci_remote_device_stop() - This function is called internally to stop the
1309 * @isci_host: This parameter specifies the isci host object.
1310 * @isci_device: This parameter specifies the remote device.
1312 * The status of the scic request to stop.
1314 enum sci_status
isci_remote_device_stop(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
1316 enum sci_status status
;
1317 unsigned long flags
;
1319 dev_dbg(&ihost
->pdev
->dev
,
1320 "%s: isci_device = %p\n", __func__
, idev
);
1322 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1323 idev
->domain_dev
->lldd_dev
= NULL
; /* disable new lookups */
1324 set_bit(IDEV_GONE
, &idev
->flags
);
1325 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1327 /* Kill all outstanding requests. */
1328 isci_remote_device_nuke_requests(ihost
, idev
);
1330 set_bit(IDEV_STOP_PENDING
, &idev
->flags
);
1332 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1333 status
= scic_remote_device_stop(&idev
->sci
, 50);
1334 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1336 /* Wait for the stop complete callback. */
1337 if (WARN_ONCE(status
!= SCI_SUCCESS
, "failed to stop device\n"))
1338 /* nothing to wait for */;
1340 wait_for_device_stop(ihost
, idev
);
1346 * isci_remote_device_gone() - This function is called by libsas when a domain
1347 * device is removed.
1348 * @domain_device: This parameter specifies the libsas domain device.
1351 void isci_remote_device_gone(struct domain_device
*dev
)
1353 struct isci_host
*ihost
= dev_to_ihost(dev
);
1354 struct isci_remote_device
*idev
= dev
->lldd_dev
;
1356 dev_dbg(&ihost
->pdev
->dev
,
1357 "%s: domain_device = %p, isci_device = %p, isci_port = %p\n",
1358 __func__
, dev
, idev
, idev
->isci_port
);
1360 isci_remote_device_stop(ihost
, idev
);
1365 * isci_remote_device_found() - This function is called by libsas when a remote
1366 * device is discovered. A remote device object is created and started. the
1367 * function then sleeps until the sci core device started message is
1369 * @domain_device: This parameter specifies the libsas domain device.
1371 * status, zero indicates success.
1373 int isci_remote_device_found(struct domain_device
*domain_dev
)
1375 struct isci_host
*isci_host
= dev_to_ihost(domain_dev
);
1376 struct isci_port
*isci_port
;
1377 struct isci_phy
*isci_phy
;
1378 struct asd_sas_port
*sas_port
;
1379 struct asd_sas_phy
*sas_phy
;
1380 struct isci_remote_device
*isci_device
;
1381 enum sci_status status
;
1383 dev_dbg(&isci_host
->pdev
->dev
,
1384 "%s: domain_device = %p\n", __func__
, domain_dev
);
1386 wait_for_start(isci_host
);
1388 sas_port
= domain_dev
->port
;
1389 sas_phy
= list_first_entry(&sas_port
->phy_list
, struct asd_sas_phy
,
1391 isci_phy
= to_isci_phy(sas_phy
);
1392 isci_port
= isci_phy
->isci_port
;
1394 /* we are being called for a device on this port,
1395 * so it has to come up eventually
1397 wait_for_completion(&isci_port
->start_complete
);
1399 if ((isci_stopping
== isci_port_get_state(isci_port
)) ||
1400 (isci_stopped
== isci_port_get_state(isci_port
)))
1403 isci_device
= isci_remote_device_alloc(isci_host
, isci_port
);
1407 kref_init(&isci_device
->kref
);
1408 INIT_LIST_HEAD(&isci_device
->node
);
1410 spin_lock_irq(&isci_host
->scic_lock
);
1411 isci_device
->domain_dev
= domain_dev
;
1412 isci_device
->isci_port
= isci_port
;
1413 list_add_tail(&isci_device
->node
, &isci_port
->remote_dev_list
);
1415 set_bit(IDEV_START_PENDING
, &isci_device
->flags
);
1416 status
= isci_remote_device_construct(isci_port
, isci_device
);
1418 dev_dbg(&isci_host
->pdev
->dev
,
1419 "%s: isci_device = %p\n",
1420 __func__
, isci_device
);
1422 if (status
== SCI_SUCCESS
) {
1423 /* device came up, advertise it to the world */
1424 domain_dev
->lldd_dev
= isci_device
;
1426 isci_put_device(isci_device
);
1427 spin_unlock_irq(&isci_host
->scic_lock
);
1429 /* wait for the device ready callback. */
1430 wait_for_device_start(isci_host
, isci_device
);
1432 return status
== SCI_SUCCESS
? 0 : -ENODEV
;
1435 * isci_device_is_reset_pending() - This function will check if there is any
1436 * pending reset condition on the device.
1437 * @request: This parameter is the isci_device object.
1439 * true if there is a reset pending for the device.
1441 bool isci_device_is_reset_pending(
1442 struct isci_host
*isci_host
,
1443 struct isci_remote_device
*isci_device
)
1445 struct isci_request
*isci_request
;
1446 struct isci_request
*tmp_req
;
1447 bool reset_is_pending
= false;
1448 unsigned long flags
;
1450 dev_dbg(&isci_host
->pdev
->dev
,
1451 "%s: isci_device = %p\n", __func__
, isci_device
);
1453 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
1455 /* Check for reset on all pending requests. */
1456 list_for_each_entry_safe(isci_request
, tmp_req
,
1457 &isci_device
->reqs_in_process
, dev_node
) {
1458 dev_dbg(&isci_host
->pdev
->dev
,
1459 "%s: isci_device = %p request = %p\n",
1460 __func__
, isci_device
, isci_request
);
1462 if (isci_request
->ttype
== io_task
) {
1463 struct sas_task
*task
= isci_request_access_task(
1466 spin_lock(&task
->task_state_lock
);
1467 if (task
->task_state_flags
& SAS_TASK_NEED_DEV_RESET
)
1468 reset_is_pending
= true;
1469 spin_unlock(&task
->task_state_lock
);
1473 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1475 dev_dbg(&isci_host
->pdev
->dev
,
1476 "%s: isci_device = %p reset_is_pending = %d\n",
1477 __func__
, isci_device
, reset_is_pending
);
1479 return reset_is_pending
;
1483 * isci_device_clear_reset_pending() - This function will clear if any pending
1484 * reset condition flags on the device.
1485 * @request: This parameter is the isci_device object.
1487 * true if there is a reset pending for the device.
1489 void isci_device_clear_reset_pending(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
1491 struct isci_request
*isci_request
;
1492 struct isci_request
*tmp_req
;
1493 unsigned long flags
= 0;
1495 dev_dbg(&ihost
->pdev
->dev
, "%s: idev=%p, ihost=%p\n",
1496 __func__
, idev
, ihost
);
1498 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1500 /* Clear reset pending on all pending requests. */
1501 list_for_each_entry_safe(isci_request
, tmp_req
,
1502 &idev
->reqs_in_process
, dev_node
) {
1503 dev_dbg(&ihost
->pdev
->dev
, "%s: idev = %p request = %p\n",
1504 __func__
, idev
, isci_request
);
1506 if (isci_request
->ttype
== io_task
) {
1508 unsigned long flags2
;
1509 struct sas_task
*task
= isci_request_access_task(
1512 spin_lock_irqsave(&task
->task_state_lock
, flags2
);
1513 task
->task_state_flags
&= ~SAS_TASK_NEED_DEV_RESET
;
1514 spin_unlock_irqrestore(&task
->task_state_lock
, flags2
);
1517 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);