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_change_state() - This function gets the status of the
66 * remote_device object.
67 * @isci_device: This parameter points to the isci_remote_device object
69 * status of the object as a isci_status enum.
71 void isci_remote_device_change_state(
72 struct isci_remote_device
*isci_device
,
73 enum isci_status status
)
77 spin_lock_irqsave(&isci_device
->state_lock
, flags
);
78 isci_device
->status
= status
;
79 spin_unlock_irqrestore(&isci_device
->state_lock
, flags
);
83 * isci_remote_device_not_ready() - This function is called by the scic when
84 * the remote device is not ready. We mark the isci device as ready (not
85 * "ready_for_io") and signal the waiting proccess.
86 * @isci_host: This parameter specifies the isci host object.
87 * @isci_device: This parameter specifies the remote device
90 static void isci_remote_device_not_ready(struct isci_host
*ihost
,
91 struct isci_remote_device
*idev
, u32 reason
)
93 dev_dbg(&ihost
->pdev
->dev
,
94 "%s: isci_device = %p\n", __func__
, idev
);
96 if (reason
== SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED
)
97 isci_remote_device_change_state(idev
, isci_stopping
);
99 /* device ready is actually a "not ready for io" state. */
100 isci_remote_device_change_state(idev
, isci_ready
);
104 * isci_remote_device_ready() - This function is called by the scic when the
105 * remote device is ready. We mark the isci device as ready and signal the
107 * @ihost: our valid isci_host
108 * @idev: remote device
111 static void isci_remote_device_ready(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
113 dev_dbg(&ihost
->pdev
->dev
,
114 "%s: idev = %p\n", __func__
, idev
);
116 isci_remote_device_change_state(idev
, isci_ready_for_io
);
117 if (test_and_clear_bit(IDEV_START_PENDING
, &idev
->flags
))
118 wake_up(&ihost
->eventq
);
121 /* called once the remote node context is ready to be freed.
122 * The remote device can now report that its stop operation is complete. none
124 static void rnc_destruct_done(void *_dev
)
126 struct scic_sds_remote_device
*sci_dev
= _dev
;
128 BUG_ON(sci_dev
->started_request_count
!= 0);
129 sci_change_state(&sci_dev
->sm
, SCI_DEV_STOPPED
);
132 static enum sci_status
scic_sds_remote_device_terminate_requests(struct scic_sds_remote_device
*sci_dev
)
134 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
135 u32 i
, request_count
= sci_dev
->started_request_count
;
136 enum sci_status status
= SCI_SUCCESS
;
138 for (i
= 0; i
< SCI_MAX_IO_REQUESTS
&& i
< request_count
; i
++) {
139 struct scic_sds_request
*sci_req
;
142 sci_req
= scic
->io_request_table
[i
];
143 if (!sci_req
|| sci_req
->target_device
!= sci_dev
)
145 s
= scic_controller_terminate_request(scic
, sci_dev
, sci_req
);
146 if (s
!= SCI_SUCCESS
)
153 enum sci_status
scic_remote_device_stop(struct scic_sds_remote_device
*sci_dev
,
156 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
157 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
160 case SCI_DEV_INITIAL
:
164 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
166 return SCI_FAILURE_INVALID_STATE
;
167 case SCI_DEV_STOPPED
:
169 case SCI_DEV_STARTING
:
170 /* device not started so there had better be no requests */
171 BUG_ON(sci_dev
->started_request_count
!= 0);
172 scic_sds_remote_node_context_destruct(&sci_dev
->rnc
,
173 rnc_destruct_done
, sci_dev
);
174 /* Transition to the stopping state and wait for the
175 * remote node to complete being posted and invalidated.
177 sci_change_state(sm
, SCI_DEV_STOPPING
);
180 case SCI_STP_DEV_IDLE
:
181 case SCI_STP_DEV_CMD
:
182 case SCI_STP_DEV_NCQ
:
183 case SCI_STP_DEV_NCQ_ERROR
:
184 case SCI_STP_DEV_AWAIT_RESET
:
185 case SCI_SMP_DEV_IDLE
:
186 case SCI_SMP_DEV_CMD
:
187 sci_change_state(sm
, SCI_DEV_STOPPING
);
188 if (sci_dev
->started_request_count
== 0) {
189 scic_sds_remote_node_context_destruct(&sci_dev
->rnc
,
190 rnc_destruct_done
, sci_dev
);
193 return scic_sds_remote_device_terminate_requests(sci_dev
);
195 case SCI_DEV_STOPPING
:
196 /* All requests should have been terminated, but if there is an
197 * attempt to stop a device already in the stopping state, then
198 * try again to terminate.
200 return scic_sds_remote_device_terminate_requests(sci_dev
);
201 case SCI_DEV_RESETTING
:
202 sci_change_state(sm
, SCI_DEV_STOPPING
);
207 enum sci_status
scic_remote_device_reset(struct scic_sds_remote_device
*sci_dev
)
209 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
210 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
213 case SCI_DEV_INITIAL
:
214 case SCI_DEV_STOPPED
:
215 case SCI_DEV_STARTING
:
216 case SCI_SMP_DEV_IDLE
:
217 case SCI_SMP_DEV_CMD
:
218 case SCI_DEV_STOPPING
:
220 case SCI_DEV_RESETTING
:
223 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
225 return SCI_FAILURE_INVALID_STATE
;
227 case SCI_STP_DEV_IDLE
:
228 case SCI_STP_DEV_CMD
:
229 case SCI_STP_DEV_NCQ
:
230 case SCI_STP_DEV_NCQ_ERROR
:
231 case SCI_STP_DEV_AWAIT_RESET
:
232 sci_change_state(sm
, SCI_DEV_RESETTING
);
237 enum sci_status
scic_remote_device_reset_complete(struct scic_sds_remote_device
*sci_dev
)
239 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
240 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
242 if (state
!= SCI_DEV_RESETTING
) {
243 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
245 return SCI_FAILURE_INVALID_STATE
;
248 sci_change_state(sm
, SCI_DEV_READY
);
252 enum sci_status
scic_sds_remote_device_suspend(struct scic_sds_remote_device
*sci_dev
,
255 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
256 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
258 if (state
!= SCI_STP_DEV_CMD
) {
259 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
261 return SCI_FAILURE_INVALID_STATE
;
264 return scic_sds_remote_node_context_suspend(&sci_dev
->rnc
,
265 suspend_type
, NULL
, NULL
);
268 enum sci_status
scic_sds_remote_device_frame_handler(struct scic_sds_remote_device
*sci_dev
,
271 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
272 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
273 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
274 enum sci_status status
;
277 case SCI_DEV_INITIAL
:
278 case SCI_DEV_STOPPED
:
279 case SCI_DEV_STARTING
:
280 case SCI_STP_DEV_IDLE
:
281 case SCI_SMP_DEV_IDLE
:
284 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
286 /* Return the frame back to the controller */
287 scic_sds_controller_release_frame(scic
, frame_index
);
288 return SCI_FAILURE_INVALID_STATE
;
290 case SCI_STP_DEV_NCQ_ERROR
:
291 case SCI_STP_DEV_AWAIT_RESET
:
292 case SCI_DEV_STOPPING
:
294 case SCI_DEV_RESETTING
: {
295 struct scic_sds_request
*sci_req
;
296 struct ssp_frame_hdr hdr
;
300 status
= scic_sds_unsolicited_frame_control_get_header(&scic
->uf_control
,
303 if (status
!= SCI_SUCCESS
)
306 word_cnt
= sizeof(hdr
) / sizeof(u32
);
307 sci_swab32_cpy(&hdr
, frame_header
, word_cnt
);
309 sci_req
= scic_request_by_tag(scic
, be16_to_cpu(hdr
.tag
));
310 if (sci_req
&& sci_req
->target_device
== sci_dev
) {
311 /* The IO request is now in charge of releasing the frame */
312 status
= scic_sds_io_request_frame_handler(sci_req
, frame_index
);
314 /* We could not map this tag to a valid IO
315 * request Just toss the frame and continue
317 scic_sds_controller_release_frame(scic
, frame_index
);
321 case SCI_STP_DEV_NCQ
: {
322 struct dev_to_host_fis
*hdr
;
324 status
= scic_sds_unsolicited_frame_control_get_header(&scic
->uf_control
,
327 if (status
!= SCI_SUCCESS
)
330 if (hdr
->fis_type
== FIS_SETDEVBITS
&&
331 (hdr
->status
& ATA_ERR
)) {
332 sci_dev
->not_ready_reason
= SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
;
334 /* TODO Check sactive and complete associated IO if any. */
335 sci_change_state(sm
, SCI_STP_DEV_NCQ_ERROR
);
336 } else if (hdr
->fis_type
== FIS_REGD2H
&&
337 (hdr
->status
& ATA_ERR
)) {
339 * Some devices return D2H FIS when an NCQ error is detected.
340 * Treat this like an SDB error FIS ready reason.
342 sci_dev
->not_ready_reason
= SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
;
343 sci_change_state(&sci_dev
->sm
, SCI_STP_DEV_NCQ_ERROR
);
345 status
= SCI_FAILURE
;
347 scic_sds_controller_release_frame(scic
, frame_index
);
350 case SCI_STP_DEV_CMD
:
351 case SCI_SMP_DEV_CMD
:
352 /* The device does not process any UF received from the hardware while
353 * in this state. All unsolicited frames are forwarded to the io request
356 status
= scic_sds_io_request_frame_handler(sci_dev
->working_request
, frame_index
);
363 static bool is_remote_device_ready(struct scic_sds_remote_device
*sci_dev
)
366 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
367 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
371 case SCI_STP_DEV_IDLE
:
372 case SCI_STP_DEV_CMD
:
373 case SCI_STP_DEV_NCQ
:
374 case SCI_STP_DEV_NCQ_ERROR
:
375 case SCI_STP_DEV_AWAIT_RESET
:
376 case SCI_SMP_DEV_IDLE
:
377 case SCI_SMP_DEV_CMD
:
384 enum sci_status
scic_sds_remote_device_event_handler(struct scic_sds_remote_device
*sci_dev
,
387 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
388 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
389 enum sci_status status
;
391 switch (scu_get_event_type(event_code
)) {
392 case SCU_EVENT_TYPE_RNC_OPS_MISC
:
393 case SCU_EVENT_TYPE_RNC_SUSPEND_TX
:
394 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX
:
395 status
= scic_sds_remote_node_context_event_handler(&sci_dev
->rnc
, event_code
);
397 case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT
:
398 if (scu_get_event_code(event_code
) == SCU_EVENT_IT_NEXUS_TIMEOUT
) {
399 status
= SCI_SUCCESS
;
401 /* Suspend the associated RNC */
402 scic_sds_remote_node_context_suspend(&sci_dev
->rnc
,
403 SCI_SOFTWARE_SUSPENSION
,
406 dev_dbg(scirdev_to_dev(sci_dev
),
407 "%s: device: %p event code: %x: %s\n",
408 __func__
, sci_dev
, event_code
,
409 is_remote_device_ready(sci_dev
)
410 ? "I_T_Nexus_Timeout event"
411 : "I_T_Nexus_Timeout event in wrong state");
415 /* Else, fall through and treat as unhandled... */
417 dev_dbg(scirdev_to_dev(sci_dev
),
418 "%s: device: %p event code: %x: %s\n",
419 __func__
, sci_dev
, event_code
,
420 is_remote_device_ready(sci_dev
)
422 : "unexpected event in wrong state");
423 status
= SCI_FAILURE_INVALID_STATE
;
427 if (status
!= SCI_SUCCESS
)
430 if (state
== SCI_STP_DEV_IDLE
) {
432 /* We pick up suspension events to handle specifically to this
433 * state. We resume the RNC right away.
435 if (scu_get_event_type(event_code
) == SCU_EVENT_TYPE_RNC_SUSPEND_TX
||
436 scu_get_event_type(event_code
) == SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX
)
437 status
= scic_sds_remote_node_context_resume(&sci_dev
->rnc
, NULL
, NULL
);
443 static void scic_sds_remote_device_start_request(struct scic_sds_remote_device
*sci_dev
,
444 struct scic_sds_request
*sci_req
,
445 enum sci_status status
)
447 struct scic_sds_port
*sci_port
= sci_dev
->owning_port
;
449 /* cleanup requests that failed after starting on the port */
450 if (status
!= SCI_SUCCESS
)
451 scic_sds_port_complete_io(sci_port
, sci_dev
, sci_req
);
453 scic_sds_remote_device_increment_request_count(sci_dev
);
456 enum sci_status
scic_sds_remote_device_start_io(struct scic_sds_controller
*scic
,
457 struct scic_sds_remote_device
*sci_dev
,
458 struct scic_sds_request
*sci_req
)
460 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
461 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
462 struct scic_sds_port
*sci_port
= sci_dev
->owning_port
;
463 struct isci_request
*ireq
= sci_req_to_ireq(sci_req
);
464 enum sci_status status
;
467 case SCI_DEV_INITIAL
:
468 case SCI_DEV_STOPPED
:
469 case SCI_DEV_STARTING
:
470 case SCI_STP_DEV_NCQ_ERROR
:
471 case SCI_DEV_STOPPING
:
473 case SCI_DEV_RESETTING
:
476 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
478 return SCI_FAILURE_INVALID_STATE
;
480 /* attempt to start an io request for this device object. The remote
481 * device object will issue the start request for the io and if
482 * successful it will start the request for the port object then
483 * increment its own request count.
485 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
486 if (status
!= SCI_SUCCESS
)
489 status
= scic_sds_remote_node_context_start_io(&sci_dev
->rnc
, sci_req
);
490 if (status
!= SCI_SUCCESS
)
493 status
= scic_sds_request_start(sci_req
);
495 case SCI_STP_DEV_IDLE
: {
496 /* handle the start io operation for a sata device that is in
497 * the command idle state. - Evalute the type of IO request to
498 * be started - If its an NCQ request change to NCQ substate -
499 * If its any other command change to the CMD substate
501 * If this is a softreset we may want to have a different
504 enum scic_sds_remote_device_states new_state
;
505 struct sas_task
*task
= isci_request_access_task(ireq
);
507 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
508 if (status
!= SCI_SUCCESS
)
511 status
= scic_sds_remote_node_context_start_io(&sci_dev
->rnc
, sci_req
);
512 if (status
!= SCI_SUCCESS
)
515 status
= scic_sds_request_start(sci_req
);
516 if (status
!= SCI_SUCCESS
)
519 if (task
->ata_task
.use_ncq
)
520 new_state
= SCI_STP_DEV_NCQ
;
522 sci_dev
->working_request
= sci_req
;
523 new_state
= SCI_STP_DEV_CMD
;
525 sci_change_state(sm
, new_state
);
528 case SCI_STP_DEV_NCQ
: {
529 struct sas_task
*task
= isci_request_access_task(ireq
);
531 if (task
->ata_task
.use_ncq
) {
532 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
533 if (status
!= SCI_SUCCESS
)
536 status
= scic_sds_remote_node_context_start_io(&sci_dev
->rnc
, sci_req
);
537 if (status
!= SCI_SUCCESS
)
540 status
= scic_sds_request_start(sci_req
);
542 return SCI_FAILURE_INVALID_STATE
;
545 case SCI_STP_DEV_AWAIT_RESET
:
546 return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED
;
547 case SCI_SMP_DEV_IDLE
:
548 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
549 if (status
!= SCI_SUCCESS
)
552 status
= scic_sds_remote_node_context_start_io(&sci_dev
->rnc
, sci_req
);
553 if (status
!= SCI_SUCCESS
)
556 status
= scic_sds_request_start(sci_req
);
557 if (status
!= SCI_SUCCESS
)
560 sci_dev
->working_request
= sci_req
;
561 sci_change_state(&sci_dev
->sm
, SCI_SMP_DEV_CMD
);
563 case SCI_STP_DEV_CMD
:
564 case SCI_SMP_DEV_CMD
:
565 /* device is already handling a command it can not accept new commands
566 * until this one is complete.
568 return SCI_FAILURE_INVALID_STATE
;
571 scic_sds_remote_device_start_request(sci_dev
, sci_req
, status
);
575 static enum sci_status
common_complete_io(struct scic_sds_port
*sci_port
,
576 struct scic_sds_remote_device
*sci_dev
,
577 struct scic_sds_request
*sci_req
)
579 enum sci_status status
;
581 status
= scic_sds_request_complete(sci_req
);
582 if (status
!= SCI_SUCCESS
)
585 status
= scic_sds_port_complete_io(sci_port
, sci_dev
, sci_req
);
586 if (status
!= SCI_SUCCESS
)
589 scic_sds_remote_device_decrement_request_count(sci_dev
);
593 enum sci_status
scic_sds_remote_device_complete_io(struct scic_sds_controller
*scic
,
594 struct scic_sds_remote_device
*sci_dev
,
595 struct scic_sds_request
*sci_req
)
597 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
598 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
599 struct scic_sds_port
*sci_port
= sci_dev
->owning_port
;
600 enum sci_status status
;
603 case SCI_DEV_INITIAL
:
604 case SCI_DEV_STOPPED
:
605 case SCI_DEV_STARTING
:
606 case SCI_STP_DEV_IDLE
:
607 case SCI_SMP_DEV_IDLE
:
611 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
613 return SCI_FAILURE_INVALID_STATE
;
615 case SCI_STP_DEV_AWAIT_RESET
:
616 case SCI_DEV_RESETTING
:
617 status
= common_complete_io(sci_port
, sci_dev
, sci_req
);
619 case SCI_STP_DEV_CMD
:
620 case SCI_STP_DEV_NCQ
:
621 case SCI_STP_DEV_NCQ_ERROR
:
622 status
= common_complete_io(sci_port
, sci_dev
, sci_req
);
623 if (status
!= SCI_SUCCESS
)
626 if (sci_req
->sci_status
== SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED
) {
627 /* This request causes hardware error, device needs to be Lun Reset.
628 * So here we force the state machine to IDLE state so the rest IOs
629 * can reach RNC state handler, these IOs will be completed by RNC with
630 * status of "DEVICE_RESET_REQUIRED", instead of "INVALID STATE".
632 sci_change_state(sm
, SCI_STP_DEV_AWAIT_RESET
);
633 } else if (scic_sds_remote_device_get_request_count(sci_dev
) == 0)
634 sci_change_state(sm
, SCI_STP_DEV_IDLE
);
636 case SCI_SMP_DEV_CMD
:
637 status
= common_complete_io(sci_port
, sci_dev
, sci_req
);
638 if (status
!= SCI_SUCCESS
)
640 sci_change_state(sm
, SCI_SMP_DEV_IDLE
);
642 case SCI_DEV_STOPPING
:
643 status
= common_complete_io(sci_port
, sci_dev
, sci_req
);
644 if (status
!= SCI_SUCCESS
)
647 if (scic_sds_remote_device_get_request_count(sci_dev
) == 0)
648 scic_sds_remote_node_context_destruct(&sci_dev
->rnc
,
654 if (status
!= SCI_SUCCESS
)
655 dev_err(scirdev_to_dev(sci_dev
),
656 "%s: Port:0x%p Device:0x%p Request:0x%p Status:0x%x "
657 "could not complete\n", __func__
, sci_port
,
658 sci_dev
, sci_req
, status
);
663 static void scic_sds_remote_device_continue_request(void *dev
)
665 struct scic_sds_remote_device
*sci_dev
= dev
;
667 /* we need to check if this request is still valid to continue. */
668 if (sci_dev
->working_request
)
669 scic_controller_continue_io(sci_dev
->working_request
);
672 enum sci_status
scic_sds_remote_device_start_task(struct scic_sds_controller
*scic
,
673 struct scic_sds_remote_device
*sci_dev
,
674 struct scic_sds_request
*sci_req
)
676 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
677 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
678 struct scic_sds_port
*sci_port
= sci_dev
->owning_port
;
679 enum sci_status status
;
682 case SCI_DEV_INITIAL
:
683 case SCI_DEV_STOPPED
:
684 case SCI_DEV_STARTING
:
685 case SCI_SMP_DEV_IDLE
:
686 case SCI_SMP_DEV_CMD
:
687 case SCI_DEV_STOPPING
:
689 case SCI_DEV_RESETTING
:
692 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
694 return SCI_FAILURE_INVALID_STATE
;
695 case SCI_STP_DEV_IDLE
:
696 case SCI_STP_DEV_CMD
:
697 case SCI_STP_DEV_NCQ
:
698 case SCI_STP_DEV_NCQ_ERROR
:
699 case SCI_STP_DEV_AWAIT_RESET
:
700 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
701 if (status
!= SCI_SUCCESS
)
704 status
= scic_sds_remote_node_context_start_task(&sci_dev
->rnc
, sci_req
);
705 if (status
!= SCI_SUCCESS
)
708 status
= scic_sds_request_start(sci_req
);
709 if (status
!= SCI_SUCCESS
)
712 /* Note: If the remote device state is not IDLE this will
713 * replace the request that probably resulted in the task
714 * management request.
716 sci_dev
->working_request
= sci_req
;
717 sci_change_state(sm
, SCI_STP_DEV_CMD
);
719 /* The remote node context must cleanup the TCi to NCQ mapping
720 * table. The only way to do this correctly is to either write
721 * to the TLCR register or to invalidate and repost the RNC. In
722 * either case the remote node context state machine will take
723 * the correct action when the remote node context is suspended
726 scic_sds_remote_node_context_suspend(&sci_dev
->rnc
,
727 SCI_SOFTWARE_SUSPENSION
, NULL
, NULL
);
728 scic_sds_remote_node_context_resume(&sci_dev
->rnc
,
729 scic_sds_remote_device_continue_request
,
733 scic_sds_remote_device_start_request(sci_dev
, sci_req
, status
);
734 /* We need to let the controller start request handler know that
735 * it can't post TC yet. We will provide a callback function to
736 * post TC when RNC gets resumed.
738 return SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS
;
740 status
= scic_sds_port_start_io(sci_port
, sci_dev
, sci_req
);
741 if (status
!= SCI_SUCCESS
)
744 status
= scic_sds_remote_node_context_start_task(&sci_dev
->rnc
, sci_req
);
745 if (status
!= SCI_SUCCESS
)
748 status
= scic_sds_request_start(sci_req
);
751 scic_sds_remote_device_start_request(sci_dev
, sci_req
, status
);
761 * This method takes the request and bulids an appropriate SCU context for the
762 * request and then requests the controller to post the request. none
764 void scic_sds_remote_device_post_request(
765 struct scic_sds_remote_device
*sci_dev
,
770 context
= scic_sds_remote_device_build_command_context(sci_dev
, request
);
772 scic_sds_controller_post_request(
773 scic_sds_remote_device_get_controller(sci_dev
),
778 /* called once the remote node context has transisitioned to a
779 * ready state. This is the indication that the remote device object can also
780 * transition to ready.
782 static void remote_device_resume_done(void *_dev
)
784 struct scic_sds_remote_device
*sci_dev
= _dev
;
786 if (is_remote_device_ready(sci_dev
))
789 /* go 'ready' if we are not already in a ready state */
790 sci_change_state(&sci_dev
->sm
, SCI_DEV_READY
);
793 static void scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handler(void *_dev
)
795 struct scic_sds_remote_device
*sci_dev
= _dev
;
796 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
797 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
799 /* For NCQ operation we do not issue a isci_remote_device_not_ready().
800 * As a result, avoid sending the ready notification.
802 if (sci_dev
->sm
.previous_state_id
!= SCI_STP_DEV_NCQ
)
803 isci_remote_device_ready(scic_to_ihost(scic
), idev
);
806 static void scic_sds_remote_device_initial_state_enter(struct sci_base_state_machine
*sm
)
808 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
810 /* Initial state is a transitional state to the stopped state */
811 sci_change_state(&sci_dev
->sm
, SCI_DEV_STOPPED
);
815 * scic_remote_device_destruct() - free remote node context and destruct
816 * @remote_device: This parameter specifies the remote device to be destructed.
818 * Remote device objects are a limited resource. As such, they must be
819 * protected. Thus calls to construct and destruct are mutually exclusive and
820 * non-reentrant. The return value shall indicate if the device was
821 * successfully destructed or if some failure occurred. enum sci_status This value
822 * is returned if the device is successfully destructed.
823 * SCI_FAILURE_INVALID_REMOTE_DEVICE This value is returned if the supplied
824 * device isn't valid (e.g. it's already been destoryed, the handle isn't
827 static enum sci_status
scic_remote_device_destruct(struct scic_sds_remote_device
*sci_dev
)
829 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
830 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
831 struct scic_sds_controller
*scic
;
833 if (state
!= SCI_DEV_STOPPED
) {
834 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
836 return SCI_FAILURE_INVALID_STATE
;
839 scic
= sci_dev
->owning_port
->owning_controller
;
840 scic_sds_controller_free_remote_node_context(scic
, sci_dev
,
841 sci_dev
->rnc
.remote_node_index
);
842 sci_dev
->rnc
.remote_node_index
= SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX
;
843 sci_change_state(sm
, SCI_DEV_FINAL
);
849 * isci_remote_device_deconstruct() - This function frees an isci_remote_device.
850 * @ihost: This parameter specifies the isci host object.
851 * @idev: This parameter specifies the remote device to be freed.
854 static void isci_remote_device_deconstruct(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
856 dev_dbg(&ihost
->pdev
->dev
,
857 "%s: isci_device = %p\n", __func__
, idev
);
859 /* There should not be any outstanding io's. All paths to
860 * here should go through isci_remote_device_nuke_requests.
861 * If we hit this condition, we will need a way to complete
862 * io requests in process */
863 while (!list_empty(&idev
->reqs_in_process
)) {
865 dev_err(&ihost
->pdev
->dev
,
866 "%s: ** request list not empty! **\n", __func__
);
870 scic_remote_device_destruct(&idev
->sci
);
871 idev
->domain_dev
->lldd_dev
= NULL
;
872 idev
->domain_dev
= NULL
;
873 idev
->isci_port
= NULL
;
874 list_del_init(&idev
->node
);
876 clear_bit(IDEV_START_PENDING
, &idev
->flags
);
877 clear_bit(IDEV_STOP_PENDING
, &idev
->flags
);
878 clear_bit(IDEV_EH
, &idev
->flags
);
879 wake_up(&ihost
->eventq
);
883 * isci_remote_device_stop_complete() - This function is called by the scic
884 * when the remote device stop has completed. We mark the isci device as not
885 * ready and remove the isci remote device.
886 * @ihost: This parameter specifies the isci host object.
887 * @idev: This parameter specifies the remote device.
888 * @status: This parameter specifies status of the completion.
891 static void isci_remote_device_stop_complete(struct isci_host
*ihost
,
892 struct isci_remote_device
*idev
)
894 dev_dbg(&ihost
->pdev
->dev
, "%s: complete idev = %p\n", __func__
, idev
);
896 isci_remote_device_change_state(idev
, isci_stopped
);
898 /* after stop, we can tear down resources. */
899 isci_remote_device_deconstruct(ihost
, idev
);
902 static void scic_sds_remote_device_stopped_state_enter(struct sci_base_state_machine
*sm
)
904 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
905 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
906 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
909 /* If we are entering from the stopping state let the SCI User know that
910 * the stop operation has completed.
912 prev_state
= sci_dev
->sm
.previous_state_id
;
913 if (prev_state
== SCI_DEV_STOPPING
)
914 isci_remote_device_stop_complete(scic_to_ihost(scic
), idev
);
916 scic_sds_controller_remote_device_stopped(scic
, sci_dev
);
919 static void scic_sds_remote_device_starting_state_enter(struct sci_base_state_machine
*sm
)
921 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
922 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
923 struct isci_host
*ihost
= scic_to_ihost(scic
);
924 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
926 isci_remote_device_not_ready(ihost
, idev
,
927 SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED
);
930 static void scic_sds_remote_device_ready_state_enter(struct sci_base_state_machine
*sm
)
932 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
933 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
934 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
935 struct domain_device
*dev
= idev
->domain_dev
;
937 scic
->remote_device_sequence
[sci_dev
->rnc
.remote_node_index
]++;
939 if (dev
->dev_type
== SATA_DEV
|| (dev
->tproto
& SAS_PROTOCOL_SATA
)) {
940 sci_change_state(&sci_dev
->sm
, SCI_STP_DEV_IDLE
);
941 } else if (dev_is_expander(dev
)) {
942 sci_change_state(&sci_dev
->sm
, SCI_SMP_DEV_IDLE
);
944 isci_remote_device_ready(scic_to_ihost(scic
), idev
);
947 static void scic_sds_remote_device_ready_state_exit(struct sci_base_state_machine
*sm
)
949 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
950 struct domain_device
*dev
= sci_dev_to_domain(sci_dev
);
952 if (dev
->dev_type
== SAS_END_DEV
) {
953 struct scic_sds_controller
*scic
= sci_dev
->owning_port
->owning_controller
;
954 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
956 isci_remote_device_not_ready(scic_to_ihost(scic
), idev
,
957 SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED
);
961 static void scic_sds_remote_device_resetting_state_enter(struct sci_base_state_machine
*sm
)
963 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
965 scic_sds_remote_node_context_suspend(
966 &sci_dev
->rnc
, SCI_SOFTWARE_SUSPENSION
, NULL
, NULL
);
969 static void scic_sds_remote_device_resetting_state_exit(struct sci_base_state_machine
*sm
)
971 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
973 scic_sds_remote_node_context_resume(&sci_dev
->rnc
, NULL
, NULL
);
976 static void scic_sds_stp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine
*sm
)
978 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
980 sci_dev
->working_request
= NULL
;
981 if (scic_sds_remote_node_context_is_ready(&sci_dev
->rnc
)) {
983 * Since the RNC is ready, it's alright to finish completion
984 * processing (e.g. signal the remote device is ready). */
985 scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handler(sci_dev
);
987 scic_sds_remote_node_context_resume(&sci_dev
->rnc
,
988 scic_sds_stp_remote_device_ready_idle_substate_resume_complete_handler
,
993 static void scic_sds_stp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine
*sm
)
995 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
996 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
998 BUG_ON(sci_dev
->working_request
== NULL
);
1000 isci_remote_device_not_ready(scic_to_ihost(scic
), sci_dev_to_idev(sci_dev
),
1001 SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED
);
1004 static void scic_sds_stp_remote_device_ready_ncq_error_substate_enter(struct sci_base_state_machine
*sm
)
1006 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
1007 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
1008 struct isci_remote_device
*idev
= sci_dev_to_idev(sci_dev
);
1010 if (sci_dev
->not_ready_reason
== SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
)
1011 isci_remote_device_not_ready(scic_to_ihost(scic
), idev
,
1012 sci_dev
->not_ready_reason
);
1015 static void scic_sds_smp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine
*sm
)
1017 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
1018 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
1020 isci_remote_device_ready(scic_to_ihost(scic
), sci_dev_to_idev(sci_dev
));
1023 static void scic_sds_smp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine
*sm
)
1025 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
1026 struct scic_sds_controller
*scic
= scic_sds_remote_device_get_controller(sci_dev
);
1028 BUG_ON(sci_dev
->working_request
== NULL
);
1030 isci_remote_device_not_ready(scic_to_ihost(scic
), sci_dev_to_idev(sci_dev
),
1031 SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED
);
1034 static void scic_sds_smp_remote_device_ready_cmd_substate_exit(struct sci_base_state_machine
*sm
)
1036 struct scic_sds_remote_device
*sci_dev
= container_of(sm
, typeof(*sci_dev
), sm
);
1038 sci_dev
->working_request
= NULL
;
1041 static const struct sci_base_state scic_sds_remote_device_state_table
[] = {
1042 [SCI_DEV_INITIAL
] = {
1043 .enter_state
= scic_sds_remote_device_initial_state_enter
,
1045 [SCI_DEV_STOPPED
] = {
1046 .enter_state
= scic_sds_remote_device_stopped_state_enter
,
1048 [SCI_DEV_STARTING
] = {
1049 .enter_state
= scic_sds_remote_device_starting_state_enter
,
1052 .enter_state
= scic_sds_remote_device_ready_state_enter
,
1053 .exit_state
= scic_sds_remote_device_ready_state_exit
1055 [SCI_STP_DEV_IDLE
] = {
1056 .enter_state
= scic_sds_stp_remote_device_ready_idle_substate_enter
,
1058 [SCI_STP_DEV_CMD
] = {
1059 .enter_state
= scic_sds_stp_remote_device_ready_cmd_substate_enter
,
1061 [SCI_STP_DEV_NCQ
] = { },
1062 [SCI_STP_DEV_NCQ_ERROR
] = {
1063 .enter_state
= scic_sds_stp_remote_device_ready_ncq_error_substate_enter
,
1065 [SCI_STP_DEV_AWAIT_RESET
] = { },
1066 [SCI_SMP_DEV_IDLE
] = {
1067 .enter_state
= scic_sds_smp_remote_device_ready_idle_substate_enter
,
1069 [SCI_SMP_DEV_CMD
] = {
1070 .enter_state
= scic_sds_smp_remote_device_ready_cmd_substate_enter
,
1071 .exit_state
= scic_sds_smp_remote_device_ready_cmd_substate_exit
,
1073 [SCI_DEV_STOPPING
] = { },
1074 [SCI_DEV_FAILED
] = { },
1075 [SCI_DEV_RESETTING
] = {
1076 .enter_state
= scic_sds_remote_device_resetting_state_enter
,
1077 .exit_state
= scic_sds_remote_device_resetting_state_exit
1079 [SCI_DEV_FINAL
] = { },
1083 * scic_remote_device_construct() - common construction
1084 * @sci_port: SAS/SATA port through which this device is accessed.
1085 * @sci_dev: remote device to construct
1087 * This routine just performs benign initialization and does not
1088 * allocate the remote_node_context which is left to
1089 * scic_remote_device_[de]a_construct(). scic_remote_device_destruct()
1090 * frees the remote_node_context(s) for the device.
1092 static void scic_remote_device_construct(struct scic_sds_port
*sci_port
,
1093 struct scic_sds_remote_device
*sci_dev
)
1095 sci_dev
->owning_port
= sci_port
;
1096 sci_dev
->started_request_count
= 0;
1098 sci_init_sm(&sci_dev
->sm
, scic_sds_remote_device_state_table
, SCI_DEV_INITIAL
);
1100 scic_sds_remote_node_context_construct(&sci_dev
->rnc
,
1101 SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX
);
1105 * scic_remote_device_da_construct() - construct direct attached device.
1107 * The information (e.g. IAF, Signature FIS, etc.) necessary to build
1108 * the device is known to the SCI Core since it is contained in the
1109 * scic_phy object. Remote node context(s) is/are a global resource
1110 * allocated by this routine, freed by scic_remote_device_destruct().
1113 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1114 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1115 * sata-only controller instance.
1116 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
1118 static enum sci_status
scic_remote_device_da_construct(struct scic_sds_port
*sci_port
,
1119 struct scic_sds_remote_device
*sci_dev
)
1121 enum sci_status status
;
1122 struct domain_device
*dev
= sci_dev_to_domain(sci_dev
);
1124 scic_remote_device_construct(sci_port
, sci_dev
);
1127 * This information is request to determine how many remote node context
1128 * entries will be needed to store the remote node.
1130 sci_dev
->is_direct_attached
= true;
1131 status
= scic_sds_controller_allocate_remote_node_context(sci_port
->owning_controller
,
1133 &sci_dev
->rnc
.remote_node_index
);
1135 if (status
!= SCI_SUCCESS
)
1138 if (dev
->dev_type
== SAS_END_DEV
|| dev
->dev_type
== SATA_DEV
||
1139 (dev
->tproto
& SAS_PROTOCOL_STP
) || dev_is_expander(dev
))
1142 return SCI_FAILURE_UNSUPPORTED_PROTOCOL
;
1144 sci_dev
->connection_rate
= scic_sds_port_get_max_allowed_speed(sci_port
);
1146 /* / @todo Should I assign the port width by reading all of the phys on the port? */
1147 sci_dev
->device_port_width
= 1;
1153 * scic_remote_device_ea_construct() - construct expander attached device
1155 * Remote node context(s) is/are a global resource allocated by this
1156 * routine, freed by scic_remote_device_destruct().
1159 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1160 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1161 * sata-only controller instance.
1162 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
1164 static enum sci_status
scic_remote_device_ea_construct(struct scic_sds_port
*sci_port
,
1165 struct scic_sds_remote_device
*sci_dev
)
1167 struct domain_device
*dev
= sci_dev_to_domain(sci_dev
);
1168 enum sci_status status
;
1170 scic_remote_device_construct(sci_port
, sci_dev
);
1172 status
= scic_sds_controller_allocate_remote_node_context(sci_port
->owning_controller
,
1174 &sci_dev
->rnc
.remote_node_index
);
1175 if (status
!= SCI_SUCCESS
)
1178 if (dev
->dev_type
== SAS_END_DEV
|| dev
->dev_type
== SATA_DEV
||
1179 (dev
->tproto
& SAS_PROTOCOL_STP
) || dev_is_expander(dev
))
1182 return SCI_FAILURE_UNSUPPORTED_PROTOCOL
;
1185 * For SAS-2 the physical link rate is actually a logical link
1186 * rate that incorporates multiplexing. The SCU doesn't
1187 * incorporate multiplexing and for the purposes of the
1188 * connection the logical link rate is that same as the
1189 * physical. Furthermore, the SAS-2 and SAS-1.1 fields overlay
1190 * one another, so this code works for both situations. */
1191 sci_dev
->connection_rate
= min_t(u16
, scic_sds_port_get_max_allowed_speed(sci_port
),
1194 /* / @todo Should I assign the port width by reading all of the phys on the port? */
1195 sci_dev
->device_port_width
= 1;
1201 * scic_remote_device_start() - This method will start the supplied remote
1202 * device. This method enables normal IO requests to flow through to the
1204 * @remote_device: This parameter specifies the device to be started.
1205 * @timeout: This parameter specifies the number of milliseconds in which the
1206 * start operation should complete.
1208 * An indication of whether the device was successfully started. SCI_SUCCESS
1209 * This value is returned if the device was successfully started.
1210 * SCI_FAILURE_INVALID_PHY This value is returned if the user attempts to start
1211 * the device when there have been no phys added to it.
1213 static enum sci_status
scic_remote_device_start(struct scic_sds_remote_device
*sci_dev
,
1216 struct sci_base_state_machine
*sm
= &sci_dev
->sm
;
1217 enum scic_sds_remote_device_states state
= sm
->current_state_id
;
1218 enum sci_status status
;
1220 if (state
!= SCI_DEV_STOPPED
) {
1221 dev_warn(scirdev_to_dev(sci_dev
), "%s: in wrong state: %d\n",
1223 return SCI_FAILURE_INVALID_STATE
;
1226 status
= scic_sds_remote_node_context_resume(&sci_dev
->rnc
,
1227 remote_device_resume_done
,
1229 if (status
!= SCI_SUCCESS
)
1232 sci_change_state(sm
, SCI_DEV_STARTING
);
1237 static enum sci_status
isci_remote_device_construct(struct isci_port
*iport
,
1238 struct isci_remote_device
*idev
)
1240 struct scic_sds_port
*sci_port
= &iport
->sci
;
1241 struct isci_host
*ihost
= iport
->isci_host
;
1242 struct domain_device
*dev
= idev
->domain_dev
;
1243 enum sci_status status
;
1245 if (dev
->parent
&& dev_is_expander(dev
->parent
))
1246 status
= scic_remote_device_ea_construct(sci_port
, &idev
->sci
);
1248 status
= scic_remote_device_da_construct(sci_port
, &idev
->sci
);
1250 if (status
!= SCI_SUCCESS
) {
1251 dev_dbg(&ihost
->pdev
->dev
, "%s: construct failed: %d\n",
1257 /* start the device. */
1258 status
= scic_remote_device_start(&idev
->sci
, ISCI_REMOTE_DEVICE_START_TIMEOUT
);
1260 if (status
!= SCI_SUCCESS
)
1261 dev_warn(&ihost
->pdev
->dev
, "remote device start failed: %d\n",
1267 void isci_remote_device_nuke_requests(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
1269 DECLARE_COMPLETION_ONSTACK(aborted_task_completion
);
1271 dev_dbg(&ihost
->pdev
->dev
,
1272 "%s: idev = %p\n", __func__
, idev
);
1274 /* Cleanup all requests pending for this device. */
1275 isci_terminate_pending_requests(ihost
, idev
);
1277 dev_dbg(&ihost
->pdev
->dev
,
1278 "%s: idev = %p, done\n", __func__
, idev
);
1282 * This function builds the isci_remote_device when a libsas dev_found message
1284 * @isci_host: This parameter specifies the isci host object.
1285 * @port: This parameter specifies the isci_port conected to this device.
1287 * pointer to new isci_remote_device.
1289 static struct isci_remote_device
*
1290 isci_remote_device_alloc(struct isci_host
*ihost
, struct isci_port
*iport
)
1292 struct isci_remote_device
*idev
;
1295 for (i
= 0; i
< SCI_MAX_REMOTE_DEVICES
; i
++) {
1296 idev
= &ihost
->devices
[i
];
1297 if (!test_and_set_bit(IDEV_ALLOCATED
, &idev
->flags
))
1301 if (i
>= SCI_MAX_REMOTE_DEVICES
) {
1302 dev_warn(&ihost
->pdev
->dev
, "%s: failed\n", __func__
);
1306 if (WARN_ONCE(!list_empty(&idev
->reqs_in_process
), "found requests in process\n"))
1309 if (WARN_ONCE(!list_empty(&idev
->node
), "found non-idle remote device\n"))
1312 isci_remote_device_change_state(idev
, isci_freed
);
1318 * isci_remote_device_stop() - This function is called internally to stop the
1320 * @isci_host: This parameter specifies the isci host object.
1321 * @isci_device: This parameter specifies the remote device.
1323 * The status of the scic request to stop.
1325 enum sci_status
isci_remote_device_stop(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
1327 enum sci_status status
;
1328 unsigned long flags
;
1330 dev_dbg(&ihost
->pdev
->dev
,
1331 "%s: isci_device = %p\n", __func__
, idev
);
1333 isci_remote_device_change_state(idev
, isci_stopping
);
1335 /* Kill all outstanding requests. */
1336 isci_remote_device_nuke_requests(ihost
, idev
);
1338 set_bit(IDEV_STOP_PENDING
, &idev
->flags
);
1340 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1341 status
= scic_remote_device_stop(&idev
->sci
, 50);
1342 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1344 /* Wait for the stop complete callback. */
1345 if (status
== SCI_SUCCESS
) {
1346 wait_for_device_stop(ihost
, idev
);
1347 clear_bit(IDEV_ALLOCATED
, &idev
->flags
);
1350 dev_dbg(&ihost
->pdev
->dev
,
1351 "%s: idev = %p - after completion wait\n",
1358 * isci_remote_device_gone() - This function is called by libsas when a domain
1359 * device is removed.
1360 * @domain_device: This parameter specifies the libsas domain device.
1363 void isci_remote_device_gone(struct domain_device
*dev
)
1365 struct isci_host
*ihost
= dev_to_ihost(dev
);
1366 struct isci_remote_device
*idev
= dev
->lldd_dev
;
1368 dev_dbg(&ihost
->pdev
->dev
,
1369 "%s: domain_device = %p, isci_device = %p, isci_port = %p\n",
1370 __func__
, dev
, idev
, idev
->isci_port
);
1372 isci_remote_device_stop(ihost
, idev
);
1377 * isci_remote_device_found() - This function is called by libsas when a remote
1378 * device is discovered. A remote device object is created and started. the
1379 * function then sleeps until the sci core device started message is
1381 * @domain_device: This parameter specifies the libsas domain device.
1383 * status, zero indicates success.
1385 int isci_remote_device_found(struct domain_device
*domain_dev
)
1387 struct isci_host
*isci_host
= dev_to_ihost(domain_dev
);
1388 struct isci_port
*isci_port
;
1389 struct isci_phy
*isci_phy
;
1390 struct asd_sas_port
*sas_port
;
1391 struct asd_sas_phy
*sas_phy
;
1392 struct isci_remote_device
*isci_device
;
1393 enum sci_status status
;
1395 dev_dbg(&isci_host
->pdev
->dev
,
1396 "%s: domain_device = %p\n", __func__
, domain_dev
);
1398 wait_for_start(isci_host
);
1400 sas_port
= domain_dev
->port
;
1401 sas_phy
= list_first_entry(&sas_port
->phy_list
, struct asd_sas_phy
,
1403 isci_phy
= to_isci_phy(sas_phy
);
1404 isci_port
= isci_phy
->isci_port
;
1406 /* we are being called for a device on this port,
1407 * so it has to come up eventually
1409 wait_for_completion(&isci_port
->start_complete
);
1411 if ((isci_stopping
== isci_port_get_state(isci_port
)) ||
1412 (isci_stopped
== isci_port_get_state(isci_port
)))
1415 isci_device
= isci_remote_device_alloc(isci_host
, isci_port
);
1419 INIT_LIST_HEAD(&isci_device
->node
);
1420 domain_dev
->lldd_dev
= isci_device
;
1421 isci_device
->domain_dev
= domain_dev
;
1422 isci_device
->isci_port
= isci_port
;
1423 isci_remote_device_change_state(isci_device
, isci_starting
);
1426 spin_lock_irq(&isci_host
->scic_lock
);
1427 list_add_tail(&isci_device
->node
, &isci_port
->remote_dev_list
);
1429 set_bit(IDEV_START_PENDING
, &isci_device
->flags
);
1430 status
= isci_remote_device_construct(isci_port
, isci_device
);
1431 spin_unlock_irq(&isci_host
->scic_lock
);
1433 dev_dbg(&isci_host
->pdev
->dev
,
1434 "%s: isci_device = %p\n",
1435 __func__
, isci_device
);
1437 if (status
!= SCI_SUCCESS
) {
1439 spin_lock_irq(&isci_host
->scic_lock
);
1440 isci_remote_device_deconstruct(
1444 spin_unlock_irq(&isci_host
->scic_lock
);
1448 /* wait for the device ready callback. */
1449 wait_for_device_start(isci_host
, isci_device
);
1454 * isci_device_is_reset_pending() - This function will check if there is any
1455 * pending reset condition on the device.
1456 * @request: This parameter is the isci_device object.
1458 * true if there is a reset pending for the device.
1460 bool isci_device_is_reset_pending(
1461 struct isci_host
*isci_host
,
1462 struct isci_remote_device
*isci_device
)
1464 struct isci_request
*isci_request
;
1465 struct isci_request
*tmp_req
;
1466 bool reset_is_pending
= false;
1467 unsigned long flags
;
1469 dev_dbg(&isci_host
->pdev
->dev
,
1470 "%s: isci_device = %p\n", __func__
, isci_device
);
1472 spin_lock_irqsave(&isci_host
->scic_lock
, flags
);
1474 /* Check for reset on all pending requests. */
1475 list_for_each_entry_safe(isci_request
, tmp_req
,
1476 &isci_device
->reqs_in_process
, dev_node
) {
1477 dev_dbg(&isci_host
->pdev
->dev
,
1478 "%s: isci_device = %p request = %p\n",
1479 __func__
, isci_device
, isci_request
);
1481 if (isci_request
->ttype
== io_task
) {
1482 struct sas_task
*task
= isci_request_access_task(
1485 spin_lock(&task
->task_state_lock
);
1486 if (task
->task_state_flags
& SAS_TASK_NEED_DEV_RESET
)
1487 reset_is_pending
= true;
1488 spin_unlock(&task
->task_state_lock
);
1492 spin_unlock_irqrestore(&isci_host
->scic_lock
, flags
);
1494 dev_dbg(&isci_host
->pdev
->dev
,
1495 "%s: isci_device = %p reset_is_pending = %d\n",
1496 __func__
, isci_device
, reset_is_pending
);
1498 return reset_is_pending
;
1502 * isci_device_clear_reset_pending() - This function will clear if any pending
1503 * reset condition flags on the device.
1504 * @request: This parameter is the isci_device object.
1506 * true if there is a reset pending for the device.
1508 void isci_device_clear_reset_pending(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
1510 struct isci_request
*isci_request
;
1511 struct isci_request
*tmp_req
;
1512 unsigned long flags
= 0;
1514 dev_dbg(&ihost
->pdev
->dev
, "%s: idev=%p, ihost=%p\n",
1515 __func__
, idev
, ihost
);
1517 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1519 /* Clear reset pending on all pending requests. */
1520 list_for_each_entry_safe(isci_request
, tmp_req
,
1521 &idev
->reqs_in_process
, dev_node
) {
1522 dev_dbg(&ihost
->pdev
->dev
, "%s: idev = %p request = %p\n",
1523 __func__
, idev
, isci_request
);
1525 if (isci_request
->ttype
== io_task
) {
1527 unsigned long flags2
;
1528 struct sas_task
*task
= isci_request_access_task(
1531 spin_lock_irqsave(&task
->task_state_lock
, flags2
);
1532 task
->task_state_flags
&= ~SAS_TASK_NEED_DEV_RESET
;
1533 spin_unlock_irqrestore(&task
->task_state_lock
, flags2
);
1536 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);