2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27 * All rights reserved.
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
33 * * Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * * Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in
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40 * contributors may be used to endorse or promote products derived
41 * from this software without specific prior written permission.
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 #include <linux/bitops.h>
59 #include "remote_device.h"
61 #include "remote_node_context.h"
62 #include "scu_event_codes.h"
67 const char *dev_state_name(enum sci_remote_device_states state
)
69 static const char * const strings
[] = REMOTE_DEV_STATES
;
71 return strings
[state
];
76 * isci_remote_device_not_ready() - This function is called by the ihost when
77 * the remote device is not ready. We mark the isci device as ready (not
78 * "ready_for_io") and signal the waiting proccess.
79 * @isci_host: This parameter specifies the isci host object.
80 * @isci_device: This parameter specifies the remote device
82 * sci_lock is held on entrance to this function.
84 static void isci_remote_device_not_ready(struct isci_host
*ihost
,
85 struct isci_remote_device
*idev
, u32 reason
)
87 struct isci_request
*ireq
;
89 dev_dbg(&ihost
->pdev
->dev
,
90 "%s: isci_device = %p\n", __func__
, idev
);
93 case SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED
:
94 set_bit(IDEV_GONE
, &idev
->flags
);
96 case SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
:
97 set_bit(IDEV_IO_NCQERROR
, &idev
->flags
);
99 /* Kill all outstanding requests for the device. */
100 list_for_each_entry(ireq
, &idev
->reqs_in_process
, dev_node
) {
102 dev_dbg(&ihost
->pdev
->dev
,
103 "%s: isci_device = %p request = %p\n",
104 __func__
, idev
, ireq
);
106 sci_controller_terminate_request(ihost
,
110 /* Fall through into the default case... */
112 clear_bit(IDEV_IO_READY
, &idev
->flags
);
118 * isci_remote_device_ready() - This function is called by the ihost when the
119 * remote device is ready. We mark the isci device as ready and signal the
121 * @ihost: our valid isci_host
122 * @idev: remote device
125 static void isci_remote_device_ready(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
127 dev_dbg(&ihost
->pdev
->dev
,
128 "%s: idev = %p\n", __func__
, idev
);
130 clear_bit(IDEV_IO_NCQERROR
, &idev
->flags
);
131 set_bit(IDEV_IO_READY
, &idev
->flags
);
132 if (test_and_clear_bit(IDEV_START_PENDING
, &idev
->flags
))
133 wake_up(&ihost
->eventq
);
136 /* called once the remote node context is ready to be freed.
137 * The remote device can now report that its stop operation is complete. none
139 static void rnc_destruct_done(void *_dev
)
141 struct isci_remote_device
*idev
= _dev
;
143 BUG_ON(idev
->started_request_count
!= 0);
144 sci_change_state(&idev
->sm
, SCI_DEV_STOPPED
);
147 static enum sci_status
sci_remote_device_terminate_requests(struct isci_remote_device
*idev
)
149 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
150 enum sci_status status
= SCI_SUCCESS
;
153 for (i
= 0; i
< SCI_MAX_IO_REQUESTS
; i
++) {
154 struct isci_request
*ireq
= ihost
->reqs
[i
];
157 if (!test_bit(IREQ_ACTIVE
, &ireq
->flags
) ||
158 ireq
->target_device
!= idev
)
161 s
= sci_controller_terminate_request(ihost
, idev
, ireq
);
162 if (s
!= SCI_SUCCESS
)
169 enum sci_status
sci_remote_device_stop(struct isci_remote_device
*idev
,
172 struct sci_base_state_machine
*sm
= &idev
->sm
;
173 enum sci_remote_device_states state
= sm
->current_state_id
;
176 case SCI_DEV_INITIAL
:
180 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
181 __func__
, dev_state_name(state
));
182 return SCI_FAILURE_INVALID_STATE
;
183 case SCI_DEV_STOPPED
:
185 case SCI_DEV_STARTING
:
186 /* device not started so there had better be no requests */
187 BUG_ON(idev
->started_request_count
!= 0);
188 sci_remote_node_context_destruct(&idev
->rnc
,
189 rnc_destruct_done
, idev
);
190 /* Transition to the stopping state and wait for the
191 * remote node to complete being posted and invalidated.
193 sci_change_state(sm
, SCI_DEV_STOPPING
);
196 case SCI_STP_DEV_IDLE
:
197 case SCI_STP_DEV_CMD
:
198 case SCI_STP_DEV_NCQ
:
199 case SCI_STP_DEV_NCQ_ERROR
:
200 case SCI_STP_DEV_AWAIT_RESET
:
201 case SCI_SMP_DEV_IDLE
:
202 case SCI_SMP_DEV_CMD
:
203 sci_change_state(sm
, SCI_DEV_STOPPING
);
204 if (idev
->started_request_count
== 0) {
205 sci_remote_node_context_destruct(&idev
->rnc
,
206 rnc_destruct_done
, idev
);
209 return sci_remote_device_terminate_requests(idev
);
211 case SCI_DEV_STOPPING
:
212 /* All requests should have been terminated, but if there is an
213 * attempt to stop a device already in the stopping state, then
214 * try again to terminate.
216 return sci_remote_device_terminate_requests(idev
);
217 case SCI_DEV_RESETTING
:
218 sci_change_state(sm
, SCI_DEV_STOPPING
);
223 enum sci_status
sci_remote_device_reset(struct isci_remote_device
*idev
)
225 struct sci_base_state_machine
*sm
= &idev
->sm
;
226 enum sci_remote_device_states state
= sm
->current_state_id
;
229 case SCI_DEV_INITIAL
:
230 case SCI_DEV_STOPPED
:
231 case SCI_DEV_STARTING
:
232 case SCI_SMP_DEV_IDLE
:
233 case SCI_SMP_DEV_CMD
:
234 case SCI_DEV_STOPPING
:
236 case SCI_DEV_RESETTING
:
239 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
240 __func__
, dev_state_name(state
));
241 return SCI_FAILURE_INVALID_STATE
;
243 case SCI_STP_DEV_IDLE
:
244 case SCI_STP_DEV_CMD
:
245 case SCI_STP_DEV_NCQ
:
246 case SCI_STP_DEV_NCQ_ERROR
:
247 case SCI_STP_DEV_AWAIT_RESET
:
248 sci_change_state(sm
, SCI_DEV_RESETTING
);
253 enum sci_status
sci_remote_device_reset_complete(struct isci_remote_device
*idev
)
255 struct sci_base_state_machine
*sm
= &idev
->sm
;
256 enum sci_remote_device_states state
= sm
->current_state_id
;
258 if (state
!= SCI_DEV_RESETTING
) {
259 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
260 __func__
, dev_state_name(state
));
261 return SCI_FAILURE_INVALID_STATE
;
264 sci_change_state(sm
, SCI_DEV_READY
);
268 enum sci_status
sci_remote_device_suspend(struct isci_remote_device
*idev
,
271 struct sci_base_state_machine
*sm
= &idev
->sm
;
272 enum sci_remote_device_states state
= sm
->current_state_id
;
274 if (state
!= SCI_STP_DEV_CMD
) {
275 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
276 __func__
, dev_state_name(state
));
277 return SCI_FAILURE_INVALID_STATE
;
280 return sci_remote_node_context_suspend(&idev
->rnc
,
281 suspend_type
, NULL
, NULL
);
284 enum sci_status
sci_remote_device_frame_handler(struct isci_remote_device
*idev
,
287 struct sci_base_state_machine
*sm
= &idev
->sm
;
288 enum sci_remote_device_states state
= sm
->current_state_id
;
289 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
290 enum sci_status status
;
293 case SCI_DEV_INITIAL
:
294 case SCI_DEV_STOPPED
:
295 case SCI_DEV_STARTING
:
296 case SCI_STP_DEV_IDLE
:
297 case SCI_SMP_DEV_IDLE
:
300 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
301 __func__
, dev_state_name(state
));
302 /* Return the frame back to the controller */
303 sci_controller_release_frame(ihost
, frame_index
);
304 return SCI_FAILURE_INVALID_STATE
;
306 case SCI_STP_DEV_NCQ_ERROR
:
307 case SCI_STP_DEV_AWAIT_RESET
:
308 case SCI_DEV_STOPPING
:
310 case SCI_DEV_RESETTING
: {
311 struct isci_request
*ireq
;
312 struct ssp_frame_hdr hdr
;
316 status
= sci_unsolicited_frame_control_get_header(&ihost
->uf_control
,
319 if (status
!= SCI_SUCCESS
)
322 word_cnt
= sizeof(hdr
) / sizeof(u32
);
323 sci_swab32_cpy(&hdr
, frame_header
, word_cnt
);
325 ireq
= sci_request_by_tag(ihost
, be16_to_cpu(hdr
.tag
));
326 if (ireq
&& ireq
->target_device
== idev
) {
327 /* The IO request is now in charge of releasing the frame */
328 status
= sci_io_request_frame_handler(ireq
, frame_index
);
330 /* We could not map this tag to a valid IO
331 * request Just toss the frame and continue
333 sci_controller_release_frame(ihost
, frame_index
);
337 case SCI_STP_DEV_NCQ
: {
338 struct dev_to_host_fis
*hdr
;
340 status
= sci_unsolicited_frame_control_get_header(&ihost
->uf_control
,
343 if (status
!= SCI_SUCCESS
)
346 if (hdr
->fis_type
== FIS_SETDEVBITS
&&
347 (hdr
->status
& ATA_ERR
)) {
348 idev
->not_ready_reason
= SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
;
350 /* TODO Check sactive and complete associated IO if any. */
351 sci_change_state(sm
, SCI_STP_DEV_NCQ_ERROR
);
352 } else if (hdr
->fis_type
== FIS_REGD2H
&&
353 (hdr
->status
& ATA_ERR
)) {
355 * Some devices return D2H FIS when an NCQ error is detected.
356 * Treat this like an SDB error FIS ready reason.
358 idev
->not_ready_reason
= SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
;
359 sci_change_state(&idev
->sm
, SCI_STP_DEV_NCQ_ERROR
);
361 status
= SCI_FAILURE
;
363 sci_controller_release_frame(ihost
, frame_index
);
366 case SCI_STP_DEV_CMD
:
367 case SCI_SMP_DEV_CMD
:
368 /* The device does not process any UF received from the hardware while
369 * in this state. All unsolicited frames are forwarded to the io request
372 status
= sci_io_request_frame_handler(idev
->working_request
, frame_index
);
379 static bool is_remote_device_ready(struct isci_remote_device
*idev
)
382 struct sci_base_state_machine
*sm
= &idev
->sm
;
383 enum sci_remote_device_states state
= sm
->current_state_id
;
387 case SCI_STP_DEV_IDLE
:
388 case SCI_STP_DEV_CMD
:
389 case SCI_STP_DEV_NCQ
:
390 case SCI_STP_DEV_NCQ_ERROR
:
391 case SCI_STP_DEV_AWAIT_RESET
:
392 case SCI_SMP_DEV_IDLE
:
393 case SCI_SMP_DEV_CMD
:
401 * called once the remote node context has transisitioned to a ready
402 * state (after suspending RX and/or TX due to early D2H fis)
404 static void atapi_remote_device_resume_done(void *_dev
)
406 struct isci_remote_device
*idev
= _dev
;
407 struct isci_request
*ireq
= idev
->working_request
;
409 sci_change_state(&ireq
->sm
, SCI_REQ_COMPLETED
);
412 enum sci_status
sci_remote_device_event_handler(struct isci_remote_device
*idev
,
415 struct sci_base_state_machine
*sm
= &idev
->sm
;
416 enum sci_remote_device_states state
= sm
->current_state_id
;
417 enum sci_status status
;
419 switch (scu_get_event_type(event_code
)) {
420 case SCU_EVENT_TYPE_RNC_OPS_MISC
:
421 case SCU_EVENT_TYPE_RNC_SUSPEND_TX
:
422 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX
:
423 status
= sci_remote_node_context_event_handler(&idev
->rnc
, event_code
);
425 case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT
:
426 if (scu_get_event_code(event_code
) == SCU_EVENT_IT_NEXUS_TIMEOUT
) {
427 status
= SCI_SUCCESS
;
429 /* Suspend the associated RNC */
430 sci_remote_node_context_suspend(&idev
->rnc
,
431 SCI_SOFTWARE_SUSPENSION
,
434 dev_dbg(scirdev_to_dev(idev
),
435 "%s: device: %p event code: %x: %s\n",
436 __func__
, idev
, event_code
,
437 is_remote_device_ready(idev
)
438 ? "I_T_Nexus_Timeout event"
439 : "I_T_Nexus_Timeout event in wrong state");
443 /* Else, fall through and treat as unhandled... */
445 dev_dbg(scirdev_to_dev(idev
),
446 "%s: device: %p event code: %x: %s\n",
447 __func__
, idev
, event_code
,
448 is_remote_device_ready(idev
)
450 : "unexpected event in wrong state");
451 status
= SCI_FAILURE_INVALID_STATE
;
455 if (status
!= SCI_SUCCESS
)
458 if (state
== SCI_STP_DEV_ATAPI_ERROR
) {
459 /* For ATAPI error state resume the RNC right away. */
460 if (scu_get_event_type(event_code
) == SCU_EVENT_TYPE_RNC_SUSPEND_TX
||
461 scu_get_event_type(event_code
) == SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX
) {
462 return sci_remote_node_context_resume(&idev
->rnc
,
463 atapi_remote_device_resume_done
,
468 if (state
== SCI_STP_DEV_IDLE
) {
470 /* We pick up suspension events to handle specifically to this
471 * state. We resume the RNC right away.
473 if (scu_get_event_type(event_code
) == SCU_EVENT_TYPE_RNC_SUSPEND_TX
||
474 scu_get_event_type(event_code
) == SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX
)
475 status
= sci_remote_node_context_resume(&idev
->rnc
, NULL
, NULL
);
481 static void sci_remote_device_start_request(struct isci_remote_device
*idev
,
482 struct isci_request
*ireq
,
483 enum sci_status status
)
485 struct isci_port
*iport
= idev
->owning_port
;
487 /* cleanup requests that failed after starting on the port */
488 if (status
!= SCI_SUCCESS
)
489 sci_port_complete_io(iport
, idev
, ireq
);
491 kref_get(&idev
->kref
);
492 idev
->started_request_count
++;
496 enum sci_status
sci_remote_device_start_io(struct isci_host
*ihost
,
497 struct isci_remote_device
*idev
,
498 struct isci_request
*ireq
)
500 struct sci_base_state_machine
*sm
= &idev
->sm
;
501 enum sci_remote_device_states state
= sm
->current_state_id
;
502 struct isci_port
*iport
= idev
->owning_port
;
503 enum sci_status status
;
506 case SCI_DEV_INITIAL
:
507 case SCI_DEV_STOPPED
:
508 case SCI_DEV_STARTING
:
509 case SCI_STP_DEV_NCQ_ERROR
:
510 case SCI_DEV_STOPPING
:
512 case SCI_DEV_RESETTING
:
515 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
516 __func__
, dev_state_name(state
));
517 return SCI_FAILURE_INVALID_STATE
;
519 /* attempt to start an io request for this device object. The remote
520 * device object will issue the start request for the io and if
521 * successful it will start the request for the port object then
522 * increment its own request count.
524 status
= sci_port_start_io(iport
, idev
, ireq
);
525 if (status
!= SCI_SUCCESS
)
528 status
= sci_remote_node_context_start_io(&idev
->rnc
, ireq
);
529 if (status
!= SCI_SUCCESS
)
532 status
= sci_request_start(ireq
);
534 case SCI_STP_DEV_IDLE
: {
535 /* handle the start io operation for a sata device that is in
536 * the command idle state. - Evalute the type of IO request to
537 * be started - If its an NCQ request change to NCQ substate -
538 * If its any other command change to the CMD substate
540 * If this is a softreset we may want to have a different
543 enum sci_remote_device_states new_state
;
544 struct sas_task
*task
= isci_request_access_task(ireq
);
546 status
= sci_port_start_io(iport
, idev
, ireq
);
547 if (status
!= SCI_SUCCESS
)
550 status
= sci_remote_node_context_start_io(&idev
->rnc
, ireq
);
551 if (status
!= SCI_SUCCESS
)
554 status
= sci_request_start(ireq
);
555 if (status
!= SCI_SUCCESS
)
558 if (task
->ata_task
.use_ncq
)
559 new_state
= SCI_STP_DEV_NCQ
;
561 idev
->working_request
= ireq
;
562 new_state
= SCI_STP_DEV_CMD
;
564 sci_change_state(sm
, new_state
);
567 case SCI_STP_DEV_NCQ
: {
568 struct sas_task
*task
= isci_request_access_task(ireq
);
570 if (task
->ata_task
.use_ncq
) {
571 status
= sci_port_start_io(iport
, idev
, ireq
);
572 if (status
!= SCI_SUCCESS
)
575 status
= sci_remote_node_context_start_io(&idev
->rnc
, ireq
);
576 if (status
!= SCI_SUCCESS
)
579 status
= sci_request_start(ireq
);
581 return SCI_FAILURE_INVALID_STATE
;
584 case SCI_STP_DEV_AWAIT_RESET
:
585 return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED
;
586 case SCI_SMP_DEV_IDLE
:
587 status
= sci_port_start_io(iport
, idev
, ireq
);
588 if (status
!= SCI_SUCCESS
)
591 status
= sci_remote_node_context_start_io(&idev
->rnc
, ireq
);
592 if (status
!= SCI_SUCCESS
)
595 status
= sci_request_start(ireq
);
596 if (status
!= SCI_SUCCESS
)
599 idev
->working_request
= ireq
;
600 sci_change_state(&idev
->sm
, SCI_SMP_DEV_CMD
);
602 case SCI_STP_DEV_CMD
:
603 case SCI_SMP_DEV_CMD
:
604 /* device is already handling a command it can not accept new commands
605 * until this one is complete.
607 return SCI_FAILURE_INVALID_STATE
;
610 sci_remote_device_start_request(idev
, ireq
, status
);
614 static enum sci_status
common_complete_io(struct isci_port
*iport
,
615 struct isci_remote_device
*idev
,
616 struct isci_request
*ireq
)
618 enum sci_status status
;
620 status
= sci_request_complete(ireq
);
621 if (status
!= SCI_SUCCESS
)
624 status
= sci_port_complete_io(iport
, idev
, ireq
);
625 if (status
!= SCI_SUCCESS
)
628 sci_remote_device_decrement_request_count(idev
);
632 enum sci_status
sci_remote_device_complete_io(struct isci_host
*ihost
,
633 struct isci_remote_device
*idev
,
634 struct isci_request
*ireq
)
636 struct sci_base_state_machine
*sm
= &idev
->sm
;
637 enum sci_remote_device_states state
= sm
->current_state_id
;
638 struct isci_port
*iport
= idev
->owning_port
;
639 enum sci_status status
;
642 case SCI_DEV_INITIAL
:
643 case SCI_DEV_STOPPED
:
644 case SCI_DEV_STARTING
:
645 case SCI_STP_DEV_IDLE
:
646 case SCI_SMP_DEV_IDLE
:
650 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
651 __func__
, dev_state_name(state
));
652 return SCI_FAILURE_INVALID_STATE
;
654 case SCI_STP_DEV_AWAIT_RESET
:
655 case SCI_DEV_RESETTING
:
656 status
= common_complete_io(iport
, idev
, ireq
);
658 case SCI_STP_DEV_CMD
:
659 case SCI_STP_DEV_NCQ
:
660 case SCI_STP_DEV_NCQ_ERROR
:
661 case SCI_STP_DEV_ATAPI_ERROR
:
662 status
= common_complete_io(iport
, idev
, ireq
);
663 if (status
!= SCI_SUCCESS
)
666 if (ireq
->sci_status
== SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED
) {
667 /* This request causes hardware error, device needs to be Lun Reset.
668 * So here we force the state machine to IDLE state so the rest IOs
669 * can reach RNC state handler, these IOs will be completed by RNC with
670 * status of "DEVICE_RESET_REQUIRED", instead of "INVALID STATE".
672 sci_change_state(sm
, SCI_STP_DEV_AWAIT_RESET
);
673 } else if (idev
->started_request_count
== 0)
674 sci_change_state(sm
, SCI_STP_DEV_IDLE
);
676 case SCI_SMP_DEV_CMD
:
677 status
= common_complete_io(iport
, idev
, ireq
);
678 if (status
!= SCI_SUCCESS
)
680 sci_change_state(sm
, SCI_SMP_DEV_IDLE
);
682 case SCI_DEV_STOPPING
:
683 status
= common_complete_io(iport
, idev
, ireq
);
684 if (status
!= SCI_SUCCESS
)
687 if (idev
->started_request_count
== 0)
688 sci_remote_node_context_destruct(&idev
->rnc
,
694 if (status
!= SCI_SUCCESS
)
695 dev_err(scirdev_to_dev(idev
),
696 "%s: Port:0x%p Device:0x%p Request:0x%p Status:0x%x "
697 "could not complete\n", __func__
, iport
,
700 isci_put_device(idev
);
705 static void sci_remote_device_continue_request(void *dev
)
707 struct isci_remote_device
*idev
= dev
;
709 /* we need to check if this request is still valid to continue. */
710 if (idev
->working_request
)
711 sci_controller_continue_io(idev
->working_request
);
714 enum sci_status
sci_remote_device_start_task(struct isci_host
*ihost
,
715 struct isci_remote_device
*idev
,
716 struct isci_request
*ireq
)
718 struct sci_base_state_machine
*sm
= &idev
->sm
;
719 enum sci_remote_device_states state
= sm
->current_state_id
;
720 struct isci_port
*iport
= idev
->owning_port
;
721 enum sci_status status
;
724 case SCI_DEV_INITIAL
:
725 case SCI_DEV_STOPPED
:
726 case SCI_DEV_STARTING
:
727 case SCI_SMP_DEV_IDLE
:
728 case SCI_SMP_DEV_CMD
:
729 case SCI_DEV_STOPPING
:
731 case SCI_DEV_RESETTING
:
734 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
735 __func__
, dev_state_name(state
));
736 return SCI_FAILURE_INVALID_STATE
;
737 case SCI_STP_DEV_IDLE
:
738 case SCI_STP_DEV_CMD
:
739 case SCI_STP_DEV_NCQ
:
740 case SCI_STP_DEV_NCQ_ERROR
:
741 case SCI_STP_DEV_AWAIT_RESET
:
742 status
= sci_port_start_io(iport
, idev
, ireq
);
743 if (status
!= SCI_SUCCESS
)
746 status
= sci_remote_node_context_start_task(&idev
->rnc
, ireq
);
747 if (status
!= SCI_SUCCESS
)
750 status
= sci_request_start(ireq
);
751 if (status
!= SCI_SUCCESS
)
754 /* Note: If the remote device state is not IDLE this will
755 * replace the request that probably resulted in the task
756 * management request.
758 idev
->working_request
= ireq
;
759 sci_change_state(sm
, SCI_STP_DEV_CMD
);
761 /* The remote node context must cleanup the TCi to NCQ mapping
762 * table. The only way to do this correctly is to either write
763 * to the TLCR register or to invalidate and repost the RNC. In
764 * either case the remote node context state machine will take
765 * the correct action when the remote node context is suspended
768 sci_remote_node_context_suspend(&idev
->rnc
,
769 SCI_SOFTWARE_SUSPENSION
, NULL
, NULL
);
770 sci_remote_node_context_resume(&idev
->rnc
,
771 sci_remote_device_continue_request
,
775 sci_remote_device_start_request(idev
, ireq
, status
);
776 /* We need to let the controller start request handler know that
777 * it can't post TC yet. We will provide a callback function to
778 * post TC when RNC gets resumed.
780 return SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS
;
782 status
= sci_port_start_io(iport
, idev
, ireq
);
783 if (status
!= SCI_SUCCESS
)
786 status
= sci_remote_node_context_start_task(&idev
->rnc
, ireq
);
787 if (status
!= SCI_SUCCESS
)
790 status
= sci_request_start(ireq
);
793 sci_remote_device_start_request(idev
, ireq
, status
);
798 void sci_remote_device_post_request(struct isci_remote_device
*idev
, u32 request
)
800 struct isci_port
*iport
= idev
->owning_port
;
804 (ISCI_PEG
<< SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT
) |
805 (iport
->physical_port_index
<< SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT
) |
806 idev
->rnc
.remote_node_index
;
808 sci_controller_post_request(iport
->owning_controller
, context
);
811 /* called once the remote node context has transisitioned to a
812 * ready state. This is the indication that the remote device object can also
813 * transition to ready.
815 static void remote_device_resume_done(void *_dev
)
817 struct isci_remote_device
*idev
= _dev
;
819 if (is_remote_device_ready(idev
))
822 /* go 'ready' if we are not already in a ready state */
823 sci_change_state(&idev
->sm
, SCI_DEV_READY
);
826 static void sci_stp_remote_device_ready_idle_substate_resume_complete_handler(void *_dev
)
828 struct isci_remote_device
*idev
= _dev
;
829 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
831 /* For NCQ operation we do not issue a isci_remote_device_not_ready().
832 * As a result, avoid sending the ready notification.
834 if (idev
->sm
.previous_state_id
!= SCI_STP_DEV_NCQ
)
835 isci_remote_device_ready(ihost
, idev
);
838 static void sci_remote_device_initial_state_enter(struct sci_base_state_machine
*sm
)
840 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
842 /* Initial state is a transitional state to the stopped state */
843 sci_change_state(&idev
->sm
, SCI_DEV_STOPPED
);
847 * sci_remote_device_destruct() - free remote node context and destruct
848 * @remote_device: This parameter specifies the remote device to be destructed.
850 * Remote device objects are a limited resource. As such, they must be
851 * protected. Thus calls to construct and destruct are mutually exclusive and
852 * non-reentrant. The return value shall indicate if the device was
853 * successfully destructed or if some failure occurred. enum sci_status This value
854 * is returned if the device is successfully destructed.
855 * SCI_FAILURE_INVALID_REMOTE_DEVICE This value is returned if the supplied
856 * device isn't valid (e.g. it's already been destoryed, the handle isn't
859 static enum sci_status
sci_remote_device_destruct(struct isci_remote_device
*idev
)
861 struct sci_base_state_machine
*sm
= &idev
->sm
;
862 enum sci_remote_device_states state
= sm
->current_state_id
;
863 struct isci_host
*ihost
;
865 if (state
!= SCI_DEV_STOPPED
) {
866 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
867 __func__
, dev_state_name(state
));
868 return SCI_FAILURE_INVALID_STATE
;
871 ihost
= idev
->owning_port
->owning_controller
;
872 sci_controller_free_remote_node_context(ihost
, idev
,
873 idev
->rnc
.remote_node_index
);
874 idev
->rnc
.remote_node_index
= SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX
;
875 sci_change_state(sm
, SCI_DEV_FINAL
);
881 * isci_remote_device_deconstruct() - This function frees an isci_remote_device.
882 * @ihost: This parameter specifies the isci host object.
883 * @idev: This parameter specifies the remote device to be freed.
886 static void isci_remote_device_deconstruct(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
888 dev_dbg(&ihost
->pdev
->dev
,
889 "%s: isci_device = %p\n", __func__
, idev
);
891 /* There should not be any outstanding io's. All paths to
892 * here should go through isci_remote_device_nuke_requests.
893 * If we hit this condition, we will need a way to complete
894 * io requests in process */
895 BUG_ON(!list_empty(&idev
->reqs_in_process
));
897 sci_remote_device_destruct(idev
);
898 list_del_init(&idev
->node
);
899 isci_put_device(idev
);
902 static void sci_remote_device_stopped_state_enter(struct sci_base_state_machine
*sm
)
904 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
905 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
908 /* If we are entering from the stopping state let the SCI User know that
909 * the stop operation has completed.
911 prev_state
= idev
->sm
.previous_state_id
;
912 if (prev_state
== SCI_DEV_STOPPING
)
913 isci_remote_device_deconstruct(ihost
, idev
);
915 sci_controller_remote_device_stopped(ihost
, idev
);
918 static void sci_remote_device_starting_state_enter(struct sci_base_state_machine
*sm
)
920 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
921 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
923 isci_remote_device_not_ready(ihost
, idev
,
924 SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED
);
927 static void sci_remote_device_ready_state_enter(struct sci_base_state_machine
*sm
)
929 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
930 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
931 struct domain_device
*dev
= idev
->domain_dev
;
933 if (dev
->dev_type
== SATA_DEV
|| (dev
->tproto
& SAS_PROTOCOL_SATA
)) {
934 sci_change_state(&idev
->sm
, SCI_STP_DEV_IDLE
);
935 } else if (dev_is_expander(dev
)) {
936 sci_change_state(&idev
->sm
, SCI_SMP_DEV_IDLE
);
938 isci_remote_device_ready(ihost
, idev
);
941 static void sci_remote_device_ready_state_exit(struct sci_base_state_machine
*sm
)
943 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
944 struct domain_device
*dev
= idev
->domain_dev
;
946 if (dev
->dev_type
== SAS_END_DEV
) {
947 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
949 isci_remote_device_not_ready(ihost
, idev
,
950 SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED
);
954 static void sci_remote_device_resetting_state_enter(struct sci_base_state_machine
*sm
)
956 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
958 sci_remote_node_context_suspend(
959 &idev
->rnc
, SCI_SOFTWARE_SUSPENSION
, NULL
, NULL
);
962 static void sci_remote_device_resetting_state_exit(struct sci_base_state_machine
*sm
)
964 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
966 sci_remote_node_context_resume(&idev
->rnc
, NULL
, NULL
);
969 static void sci_stp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine
*sm
)
971 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
973 idev
->working_request
= NULL
;
974 if (sci_remote_node_context_is_ready(&idev
->rnc
)) {
976 * Since the RNC is ready, it's alright to finish completion
977 * processing (e.g. signal the remote device is ready). */
978 sci_stp_remote_device_ready_idle_substate_resume_complete_handler(idev
);
980 sci_remote_node_context_resume(&idev
->rnc
,
981 sci_stp_remote_device_ready_idle_substate_resume_complete_handler
,
986 static void sci_stp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine
*sm
)
988 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
989 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
991 BUG_ON(idev
->working_request
== NULL
);
993 isci_remote_device_not_ready(ihost
, idev
,
994 SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED
);
997 static void sci_stp_remote_device_ready_ncq_error_substate_enter(struct sci_base_state_machine
*sm
)
999 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
1000 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
1002 if (idev
->not_ready_reason
== SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED
)
1003 isci_remote_device_not_ready(ihost
, idev
,
1004 idev
->not_ready_reason
);
1007 static void sci_smp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine
*sm
)
1009 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
1010 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
1012 isci_remote_device_ready(ihost
, idev
);
1015 static void sci_smp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine
*sm
)
1017 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
1018 struct isci_host
*ihost
= idev
->owning_port
->owning_controller
;
1020 BUG_ON(idev
->working_request
== NULL
);
1022 isci_remote_device_not_ready(ihost
, idev
,
1023 SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED
);
1026 static void sci_smp_remote_device_ready_cmd_substate_exit(struct sci_base_state_machine
*sm
)
1028 struct isci_remote_device
*idev
= container_of(sm
, typeof(*idev
), sm
);
1030 idev
->working_request
= NULL
;
1033 static const struct sci_base_state sci_remote_device_state_table
[] = {
1034 [SCI_DEV_INITIAL
] = {
1035 .enter_state
= sci_remote_device_initial_state_enter
,
1037 [SCI_DEV_STOPPED
] = {
1038 .enter_state
= sci_remote_device_stopped_state_enter
,
1040 [SCI_DEV_STARTING
] = {
1041 .enter_state
= sci_remote_device_starting_state_enter
,
1044 .enter_state
= sci_remote_device_ready_state_enter
,
1045 .exit_state
= sci_remote_device_ready_state_exit
1047 [SCI_STP_DEV_IDLE
] = {
1048 .enter_state
= sci_stp_remote_device_ready_idle_substate_enter
,
1050 [SCI_STP_DEV_CMD
] = {
1051 .enter_state
= sci_stp_remote_device_ready_cmd_substate_enter
,
1053 [SCI_STP_DEV_NCQ
] = { },
1054 [SCI_STP_DEV_NCQ_ERROR
] = {
1055 .enter_state
= sci_stp_remote_device_ready_ncq_error_substate_enter
,
1057 [SCI_STP_DEV_ATAPI_ERROR
] = { },
1058 [SCI_STP_DEV_AWAIT_RESET
] = { },
1059 [SCI_SMP_DEV_IDLE
] = {
1060 .enter_state
= sci_smp_remote_device_ready_idle_substate_enter
,
1062 [SCI_SMP_DEV_CMD
] = {
1063 .enter_state
= sci_smp_remote_device_ready_cmd_substate_enter
,
1064 .exit_state
= sci_smp_remote_device_ready_cmd_substate_exit
,
1066 [SCI_DEV_STOPPING
] = { },
1067 [SCI_DEV_FAILED
] = { },
1068 [SCI_DEV_RESETTING
] = {
1069 .enter_state
= sci_remote_device_resetting_state_enter
,
1070 .exit_state
= sci_remote_device_resetting_state_exit
1072 [SCI_DEV_FINAL
] = { },
1076 * sci_remote_device_construct() - common construction
1077 * @sci_port: SAS/SATA port through which this device is accessed.
1078 * @sci_dev: remote device to construct
1080 * This routine just performs benign initialization and does not
1081 * allocate the remote_node_context which is left to
1082 * sci_remote_device_[de]a_construct(). sci_remote_device_destruct()
1083 * frees the remote_node_context(s) for the device.
1085 static void sci_remote_device_construct(struct isci_port
*iport
,
1086 struct isci_remote_device
*idev
)
1088 idev
->owning_port
= iport
;
1089 idev
->started_request_count
= 0;
1091 sci_init_sm(&idev
->sm
, sci_remote_device_state_table
, SCI_DEV_INITIAL
);
1093 sci_remote_node_context_construct(&idev
->rnc
,
1094 SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX
);
1098 * sci_remote_device_da_construct() - construct direct attached device.
1100 * The information (e.g. IAF, Signature FIS, etc.) necessary to build
1101 * the device is known to the SCI Core since it is contained in the
1102 * sci_phy object. Remote node context(s) is/are a global resource
1103 * allocated by this routine, freed by sci_remote_device_destruct().
1106 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1107 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1108 * sata-only controller instance.
1109 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
1111 static enum sci_status
sci_remote_device_da_construct(struct isci_port
*iport
,
1112 struct isci_remote_device
*idev
)
1114 enum sci_status status
;
1115 struct sci_port_properties properties
;
1116 struct domain_device
*dev
= idev
->domain_dev
;
1118 sci_remote_device_construct(iport
, idev
);
1121 * This information is request to determine how many remote node context
1122 * entries will be needed to store the remote node.
1124 idev
->is_direct_attached
= true;
1126 sci_port_get_properties(iport
, &properties
);
1127 /* Get accurate port width from port's phy mask for a DA device. */
1128 idev
->device_port_width
= hweight32(properties
.phy_mask
);
1130 status
= sci_controller_allocate_remote_node_context(iport
->owning_controller
,
1132 &idev
->rnc
.remote_node_index
);
1134 if (status
!= SCI_SUCCESS
)
1137 if (dev
->dev_type
== SAS_END_DEV
|| dev
->dev_type
== SATA_DEV
||
1138 (dev
->tproto
& SAS_PROTOCOL_STP
) || dev_is_expander(dev
))
1141 return SCI_FAILURE_UNSUPPORTED_PROTOCOL
;
1143 idev
->connection_rate
= sci_port_get_max_allowed_speed(iport
);
1149 * sci_remote_device_ea_construct() - construct expander attached device
1151 * Remote node context(s) is/are a global resource allocated by this
1152 * routine, freed by sci_remote_device_destruct().
1155 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1156 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1157 * sata-only controller instance.
1158 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
1160 static enum sci_status
sci_remote_device_ea_construct(struct isci_port
*iport
,
1161 struct isci_remote_device
*idev
)
1163 struct domain_device
*dev
= idev
->domain_dev
;
1164 enum sci_status status
;
1166 sci_remote_device_construct(iport
, idev
);
1168 status
= sci_controller_allocate_remote_node_context(iport
->owning_controller
,
1170 &idev
->rnc
.remote_node_index
);
1171 if (status
!= SCI_SUCCESS
)
1174 if (dev
->dev_type
== SAS_END_DEV
|| dev
->dev_type
== SATA_DEV
||
1175 (dev
->tproto
& SAS_PROTOCOL_STP
) || dev_is_expander(dev
))
1178 return SCI_FAILURE_UNSUPPORTED_PROTOCOL
;
1181 * For SAS-2 the physical link rate is actually a logical link
1182 * rate that incorporates multiplexing. The SCU doesn't
1183 * incorporate multiplexing and for the purposes of the
1184 * connection the logical link rate is that same as the
1185 * physical. Furthermore, the SAS-2 and SAS-1.1 fields overlay
1186 * one another, so this code works for both situations. */
1187 idev
->connection_rate
= min_t(u16
, sci_port_get_max_allowed_speed(iport
),
1190 /* / @todo Should I assign the port width by reading all of the phys on the port? */
1191 idev
->device_port_width
= 1;
1197 * sci_remote_device_start() - This method will start the supplied remote
1198 * device. This method enables normal IO requests to flow through to the
1200 * @remote_device: This parameter specifies the device to be started.
1201 * @timeout: This parameter specifies the number of milliseconds in which the
1202 * start operation should complete.
1204 * An indication of whether the device was successfully started. SCI_SUCCESS
1205 * This value is returned if the device was successfully started.
1206 * SCI_FAILURE_INVALID_PHY This value is returned if the user attempts to start
1207 * the device when there have been no phys added to it.
1209 static enum sci_status
sci_remote_device_start(struct isci_remote_device
*idev
,
1212 struct sci_base_state_machine
*sm
= &idev
->sm
;
1213 enum sci_remote_device_states state
= sm
->current_state_id
;
1214 enum sci_status status
;
1216 if (state
!= SCI_DEV_STOPPED
) {
1217 dev_warn(scirdev_to_dev(idev
), "%s: in wrong state: %s\n",
1218 __func__
, dev_state_name(state
));
1219 return SCI_FAILURE_INVALID_STATE
;
1222 status
= sci_remote_node_context_resume(&idev
->rnc
,
1223 remote_device_resume_done
,
1225 if (status
!= SCI_SUCCESS
)
1228 sci_change_state(sm
, SCI_DEV_STARTING
);
1233 static enum sci_status
isci_remote_device_construct(struct isci_port
*iport
,
1234 struct isci_remote_device
*idev
)
1236 struct isci_host
*ihost
= iport
->isci_host
;
1237 struct domain_device
*dev
= idev
->domain_dev
;
1238 enum sci_status status
;
1240 if (dev
->parent
&& dev_is_expander(dev
->parent
))
1241 status
= sci_remote_device_ea_construct(iport
, idev
);
1243 status
= sci_remote_device_da_construct(iport
, idev
);
1245 if (status
!= SCI_SUCCESS
) {
1246 dev_dbg(&ihost
->pdev
->dev
, "%s: construct failed: %d\n",
1252 /* start the device. */
1253 status
= sci_remote_device_start(idev
, ISCI_REMOTE_DEVICE_START_TIMEOUT
);
1255 if (status
!= SCI_SUCCESS
)
1256 dev_warn(&ihost
->pdev
->dev
, "remote device start failed: %d\n",
1262 void isci_remote_device_nuke_requests(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
1264 DECLARE_COMPLETION_ONSTACK(aborted_task_completion
);
1266 dev_dbg(&ihost
->pdev
->dev
,
1267 "%s: idev = %p\n", __func__
, idev
);
1269 /* Cleanup all requests pending for this device. */
1270 isci_terminate_pending_requests(ihost
, idev
);
1272 dev_dbg(&ihost
->pdev
->dev
,
1273 "%s: idev = %p, done\n", __func__
, idev
);
1277 * This function builds the isci_remote_device when a libsas dev_found message
1279 * @isci_host: This parameter specifies the isci host object.
1280 * @port: This parameter specifies the isci_port conected to this device.
1282 * pointer to new isci_remote_device.
1284 static struct isci_remote_device
*
1285 isci_remote_device_alloc(struct isci_host
*ihost
, struct isci_port
*iport
)
1287 struct isci_remote_device
*idev
;
1290 for (i
= 0; i
< SCI_MAX_REMOTE_DEVICES
; i
++) {
1291 idev
= &ihost
->devices
[i
];
1292 if (!test_and_set_bit(IDEV_ALLOCATED
, &idev
->flags
))
1296 if (i
>= SCI_MAX_REMOTE_DEVICES
) {
1297 dev_warn(&ihost
->pdev
->dev
, "%s: failed\n", __func__
);
1301 if (WARN_ONCE(!list_empty(&idev
->reqs_in_process
), "found requests in process\n"))
1304 if (WARN_ONCE(!list_empty(&idev
->node
), "found non-idle remote device\n"))
1310 void isci_remote_device_release(struct kref
*kref
)
1312 struct isci_remote_device
*idev
= container_of(kref
, typeof(*idev
), kref
);
1313 struct isci_host
*ihost
= idev
->isci_port
->isci_host
;
1315 idev
->domain_dev
= NULL
;
1316 idev
->isci_port
= NULL
;
1317 clear_bit(IDEV_START_PENDING
, &idev
->flags
);
1318 clear_bit(IDEV_STOP_PENDING
, &idev
->flags
);
1319 clear_bit(IDEV_IO_READY
, &idev
->flags
);
1320 clear_bit(IDEV_GONE
, &idev
->flags
);
1321 smp_mb__before_clear_bit();
1322 clear_bit(IDEV_ALLOCATED
, &idev
->flags
);
1323 wake_up(&ihost
->eventq
);
1327 * isci_remote_device_stop() - This function is called internally to stop the
1329 * @isci_host: This parameter specifies the isci host object.
1330 * @isci_device: This parameter specifies the remote device.
1332 * The status of the ihost request to stop.
1334 enum sci_status
isci_remote_device_stop(struct isci_host
*ihost
, struct isci_remote_device
*idev
)
1336 enum sci_status status
;
1337 unsigned long flags
;
1339 dev_dbg(&ihost
->pdev
->dev
,
1340 "%s: isci_device = %p\n", __func__
, idev
);
1342 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1343 idev
->domain_dev
->lldd_dev
= NULL
; /* disable new lookups */
1344 set_bit(IDEV_GONE
, &idev
->flags
);
1345 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1347 /* Kill all outstanding requests. */
1348 isci_remote_device_nuke_requests(ihost
, idev
);
1350 set_bit(IDEV_STOP_PENDING
, &idev
->flags
);
1352 spin_lock_irqsave(&ihost
->scic_lock
, flags
);
1353 status
= sci_remote_device_stop(idev
, 50);
1354 spin_unlock_irqrestore(&ihost
->scic_lock
, flags
);
1356 /* Wait for the stop complete callback. */
1357 if (WARN_ONCE(status
!= SCI_SUCCESS
, "failed to stop device\n"))
1358 /* nothing to wait for */;
1360 wait_for_device_stop(ihost
, idev
);
1366 * isci_remote_device_gone() - This function is called by libsas when a domain
1367 * device is removed.
1368 * @domain_device: This parameter specifies the libsas domain device.
1371 void isci_remote_device_gone(struct domain_device
*dev
)
1373 struct isci_host
*ihost
= dev_to_ihost(dev
);
1374 struct isci_remote_device
*idev
= dev
->lldd_dev
;
1376 dev_dbg(&ihost
->pdev
->dev
,
1377 "%s: domain_device = %p, isci_device = %p, isci_port = %p\n",
1378 __func__
, dev
, idev
, idev
->isci_port
);
1380 isci_remote_device_stop(ihost
, idev
);
1385 * isci_remote_device_found() - This function is called by libsas when a remote
1386 * device is discovered. A remote device object is created and started. the
1387 * function then sleeps until the sci core device started message is
1389 * @domain_device: This parameter specifies the libsas domain device.
1391 * status, zero indicates success.
1393 int isci_remote_device_found(struct domain_device
*dev
)
1395 struct isci_host
*isci_host
= dev_to_ihost(dev
);
1396 struct isci_port
*isci_port
= dev
->port
->lldd_port
;
1397 struct isci_remote_device
*isci_device
;
1398 enum sci_status status
;
1400 dev_dbg(&isci_host
->pdev
->dev
,
1401 "%s: domain_device = %p\n", __func__
, dev
);
1406 isci_device
= isci_remote_device_alloc(isci_host
, isci_port
);
1410 kref_init(&isci_device
->kref
);
1411 INIT_LIST_HEAD(&isci_device
->node
);
1413 spin_lock_irq(&isci_host
->scic_lock
);
1414 isci_device
->domain_dev
= dev
;
1415 isci_device
->isci_port
= isci_port
;
1416 list_add_tail(&isci_device
->node
, &isci_port
->remote_dev_list
);
1418 set_bit(IDEV_START_PENDING
, &isci_device
->flags
);
1419 status
= isci_remote_device_construct(isci_port
, isci_device
);
1421 dev_dbg(&isci_host
->pdev
->dev
,
1422 "%s: isci_device = %p\n",
1423 __func__
, isci_device
);
1425 if (status
== SCI_SUCCESS
) {
1426 /* device came up, advertise it to the world */
1427 dev
->lldd_dev
= isci_device
;
1429 isci_put_device(isci_device
);
1430 spin_unlock_irq(&isci_host
->scic_lock
);
1432 /* wait for the device ready callback. */
1433 wait_for_device_start(isci_host
, isci_device
);
1435 return status
== SCI_SUCCESS
? 0 : -ENODEV
;