1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55#include <scsi/sas_ata.h>
56#include "host.h"
57#include "isci.h"
58#include "remote_device.h"
59#include "remote_node_context.h"
60#include "scu_event_codes.h"
61#include "scu_task_context.h"
62
63#undef C
64#define C(a) (#a)
65const char *rnc_state_name(enum scis_sds_remote_node_context_states state)
66{
67 static const char * const strings[] = RNC_STATES;
68
69 return strings[state];
70}
71#undef C
72
73
74
75
76
77
78
79
80
81bool sci_remote_node_context_is_ready(
82 struct sci_remote_node_context *sci_rnc)
83{
84 u32 current_state = sci_rnc->sm.current_state_id;
85
86 if (current_state == SCI_RNC_READY) {
87 return true;
88 }
89
90 return false;
91}
92
93bool sci_remote_node_context_is_suspended(struct sci_remote_node_context *sci_rnc)
94{
95 u32 current_state = sci_rnc->sm.current_state_id;
96
97 if (current_state == SCI_RNC_TX_RX_SUSPENDED)
98 return true;
99 return false;
100}
101
102static union scu_remote_node_context *sci_rnc_by_id(struct isci_host *ihost, u16 id)
103{
104 if (id < ihost->remote_node_entries &&
105 ihost->device_table[id])
106 return &ihost->remote_node_context_table[id];
107
108 return NULL;
109}
110
111static void sci_remote_node_context_construct_buffer(struct sci_remote_node_context *sci_rnc)
112{
113 struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
114 struct domain_device *dev = idev->domain_dev;
115 int rni = sci_rnc->remote_node_index;
116 union scu_remote_node_context *rnc;
117 struct isci_host *ihost;
118 __le64 sas_addr;
119
120 ihost = idev->owning_port->owning_controller;
121 rnc = sci_rnc_by_id(ihost, rni);
122
123 memset(rnc, 0, sizeof(union scu_remote_node_context)
124 * sci_remote_device_node_count(idev));
125
126 rnc->ssp.remote_node_index = rni;
127 rnc->ssp.remote_node_port_width = idev->device_port_width;
128 rnc->ssp.logical_port_index = idev->owning_port->physical_port_index;
129
130
131 sas_addr = cpu_to_le64(SAS_ADDR(dev->sas_addr));
132 rnc->ssp.remote_sas_address_hi = upper_32_bits(sas_addr);
133 rnc->ssp.remote_sas_address_lo = lower_32_bits(sas_addr);
134
135 rnc->ssp.nexus_loss_timer_enable = true;
136 rnc->ssp.check_bit = false;
137 rnc->ssp.is_valid = false;
138 rnc->ssp.is_remote_node_context = true;
139 rnc->ssp.function_number = 0;
140
141 rnc->ssp.arbitration_wait_time = 0;
142
143 if (dev_is_sata(dev)) {
144 rnc->ssp.connection_occupancy_timeout =
145 ihost->user_parameters.stp_max_occupancy_timeout;
146 rnc->ssp.connection_inactivity_timeout =
147 ihost->user_parameters.stp_inactivity_timeout;
148 } else {
149 rnc->ssp.connection_occupancy_timeout =
150 ihost->user_parameters.ssp_max_occupancy_timeout;
151 rnc->ssp.connection_inactivity_timeout =
152 ihost->user_parameters.ssp_inactivity_timeout;
153 }
154
155 rnc->ssp.initial_arbitration_wait_time = 0;
156
157
158 rnc->ssp.oaf_connection_rate = idev->connection_rate;
159 rnc->ssp.oaf_features = 0;
160 rnc->ssp.oaf_source_zone_group = 0;
161 rnc->ssp.oaf_more_compatibility_features = 0;
162}
163
164
165
166
167
168
169
170
171
172
173static void sci_remote_node_context_setup_to_resume(
174 struct sci_remote_node_context *sci_rnc,
175 scics_sds_remote_node_context_callback callback,
176 void *callback_parameter,
177 enum sci_remote_node_context_destination_state dest_param)
178{
179 if (sci_rnc->destination_state != RNC_DEST_FINAL) {
180 sci_rnc->destination_state = dest_param;
181 if (callback != NULL) {
182 sci_rnc->user_callback = callback;
183 sci_rnc->user_cookie = callback_parameter;
184 }
185 }
186}
187
188static void sci_remote_node_context_setup_to_destroy(
189 struct sci_remote_node_context *sci_rnc,
190 scics_sds_remote_node_context_callback callback,
191 void *callback_parameter)
192{
193 struct isci_host *ihost = idev_to_ihost(rnc_to_dev(sci_rnc));
194
195 sci_rnc->destination_state = RNC_DEST_FINAL;
196 sci_rnc->user_callback = callback;
197 sci_rnc->user_cookie = callback_parameter;
198
199 wake_up(&ihost->eventq);
200}
201
202
203
204
205
206
207
208static void sci_remote_node_context_notify_user(
209 struct sci_remote_node_context *rnc)
210{
211 if (rnc->user_callback != NULL) {
212 (*rnc->user_callback)(rnc->user_cookie);
213
214 rnc->user_callback = NULL;
215 rnc->user_cookie = NULL;
216 }
217}
218
219static void sci_remote_node_context_continue_state_transitions(struct sci_remote_node_context *rnc)
220{
221 switch (rnc->destination_state) {
222 case RNC_DEST_READY:
223 case RNC_DEST_SUSPENDED_RESUME:
224 rnc->destination_state = RNC_DEST_READY;
225
226 case RNC_DEST_FINAL:
227 sci_remote_node_context_resume(rnc, rnc->user_callback,
228 rnc->user_cookie);
229 break;
230 default:
231 rnc->destination_state = RNC_DEST_UNSPECIFIED;
232 break;
233 }
234}
235
236static void sci_remote_node_context_validate_context_buffer(struct sci_remote_node_context *sci_rnc)
237{
238 union scu_remote_node_context *rnc_buffer;
239 struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
240 struct domain_device *dev = idev->domain_dev;
241 struct isci_host *ihost = idev->owning_port->owning_controller;
242
243 rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index);
244
245 rnc_buffer->ssp.is_valid = true;
246
247 if (dev_is_sata(dev) && dev->parent) {
248 sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_96);
249 } else {
250 sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_32);
251
252 if (!dev->parent)
253 sci_port_setup_transports(idev->owning_port,
254 sci_rnc->remote_node_index);
255 }
256}
257
258static void sci_remote_node_context_invalidate_context_buffer(struct sci_remote_node_context *sci_rnc)
259{
260 union scu_remote_node_context *rnc_buffer;
261 struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
262 struct isci_host *ihost = idev->owning_port->owning_controller;
263
264 rnc_buffer = sci_rnc_by_id(ihost, sci_rnc->remote_node_index);
265
266 rnc_buffer->ssp.is_valid = false;
267
268 sci_remote_device_post_request(rnc_to_dev(sci_rnc),
269 SCU_CONTEXT_COMMAND_POST_RNC_INVALIDATE);
270}
271
272static void sci_remote_node_context_initial_state_enter(struct sci_base_state_machine *sm)
273{
274 struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
275 struct isci_remote_device *idev = rnc_to_dev(rnc);
276 struct isci_host *ihost = idev->owning_port->owning_controller;
277
278
279
280
281 if (sm->previous_state_id == SCI_RNC_INVALIDATING) {
282 rnc->destination_state = RNC_DEST_UNSPECIFIED;
283 sci_remote_node_context_notify_user(rnc);
284
285 smp_wmb();
286 wake_up(&ihost->eventq);
287 }
288}
289
290static void sci_remote_node_context_posting_state_enter(struct sci_base_state_machine *sm)
291{
292 struct sci_remote_node_context *sci_rnc = container_of(sm, typeof(*sci_rnc), sm);
293
294 sci_remote_node_context_validate_context_buffer(sci_rnc);
295}
296
297static void sci_remote_node_context_invalidating_state_enter(struct sci_base_state_machine *sm)
298{
299 struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
300
301
302 sci_remote_device_terminate_requests(rnc_to_dev(rnc));
303 sci_remote_node_context_invalidate_context_buffer(rnc);
304}
305
306static void sci_remote_node_context_resuming_state_enter(struct sci_base_state_machine *sm)
307{
308 struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
309 struct isci_remote_device *idev;
310 struct domain_device *dev;
311
312 idev = rnc_to_dev(rnc);
313 dev = idev->domain_dev;
314
315
316
317
318
319
320
321 if (dev_is_sata(dev) && !dev->parent)
322 sci_port_setup_transports(idev->owning_port, rnc->remote_node_index);
323
324 sci_remote_device_post_request(idev, SCU_CONTEXT_COMMAND_POST_RNC_RESUME);
325}
326
327static void sci_remote_node_context_ready_state_enter(struct sci_base_state_machine *sm)
328{
329 struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
330 enum sci_remote_node_context_destination_state dest_select;
331 int tell_user = 1;
332
333 dest_select = rnc->destination_state;
334 rnc->destination_state = RNC_DEST_UNSPECIFIED;
335
336 if ((dest_select == RNC_DEST_SUSPENDED) ||
337 (dest_select == RNC_DEST_SUSPENDED_RESUME)) {
338 sci_remote_node_context_suspend(
339 rnc, rnc->suspend_reason,
340 SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT);
341
342 if (dest_select == RNC_DEST_SUSPENDED_RESUME)
343 tell_user = 0;
344 }
345 if (tell_user)
346 sci_remote_node_context_notify_user(rnc);
347}
348
349static void sci_remote_node_context_tx_suspended_state_enter(struct sci_base_state_machine *sm)
350{
351 struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
352
353 sci_remote_node_context_continue_state_transitions(rnc);
354}
355
356static void sci_remote_node_context_tx_rx_suspended_state_enter(struct sci_base_state_machine *sm)
357{
358 struct sci_remote_node_context *rnc = container_of(sm, typeof(*rnc), sm);
359 struct isci_remote_device *idev = rnc_to_dev(rnc);
360 struct isci_host *ihost = idev->owning_port->owning_controller;
361 u32 new_count = rnc->suspend_count + 1;
362
363 if (new_count == 0)
364 rnc->suspend_count = 1;
365 else
366 rnc->suspend_count = new_count;
367 smp_wmb();
368
369
370 sci_remote_device_abort_requests_pending_abort(idev);
371
372 wake_up(&ihost->eventq);
373 sci_remote_node_context_continue_state_transitions(rnc);
374}
375
376static void sci_remote_node_context_await_suspend_state_exit(
377 struct sci_base_state_machine *sm)
378{
379 struct sci_remote_node_context *rnc
380 = container_of(sm, typeof(*rnc), sm);
381 struct isci_remote_device *idev = rnc_to_dev(rnc);
382
383 if (dev_is_sata(idev->domain_dev))
384 isci_dev_set_hang_detection_timeout(idev, 0);
385}
386
387static const struct sci_base_state sci_remote_node_context_state_table[] = {
388 [SCI_RNC_INITIAL] = {
389 .enter_state = sci_remote_node_context_initial_state_enter,
390 },
391 [SCI_RNC_POSTING] = {
392 .enter_state = sci_remote_node_context_posting_state_enter,
393 },
394 [SCI_RNC_INVALIDATING] = {
395 .enter_state = sci_remote_node_context_invalidating_state_enter,
396 },
397 [SCI_RNC_RESUMING] = {
398 .enter_state = sci_remote_node_context_resuming_state_enter,
399 },
400 [SCI_RNC_READY] = {
401 .enter_state = sci_remote_node_context_ready_state_enter,
402 },
403 [SCI_RNC_TX_SUSPENDED] = {
404 .enter_state = sci_remote_node_context_tx_suspended_state_enter,
405 },
406 [SCI_RNC_TX_RX_SUSPENDED] = {
407 .enter_state = sci_remote_node_context_tx_rx_suspended_state_enter,
408 },
409 [SCI_RNC_AWAIT_SUSPENSION] = {
410 .exit_state = sci_remote_node_context_await_suspend_state_exit,
411 },
412};
413
414void sci_remote_node_context_construct(struct sci_remote_node_context *rnc,
415 u16 remote_node_index)
416{
417 memset(rnc, 0, sizeof(struct sci_remote_node_context));
418
419 rnc->remote_node_index = remote_node_index;
420 rnc->destination_state = RNC_DEST_UNSPECIFIED;
421
422 sci_init_sm(&rnc->sm, sci_remote_node_context_state_table, SCI_RNC_INITIAL);
423}
424
425enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_context *sci_rnc,
426 u32 event_code)
427{
428 enum scis_sds_remote_node_context_states state;
429 u32 next_state;
430
431 state = sci_rnc->sm.current_state_id;
432 switch (state) {
433 case SCI_RNC_POSTING:
434 switch (scu_get_event_code(event_code)) {
435 case SCU_EVENT_POST_RNC_COMPLETE:
436 sci_change_state(&sci_rnc->sm, SCI_RNC_READY);
437 break;
438 default:
439 goto out;
440 }
441 break;
442 case SCI_RNC_INVALIDATING:
443 if (scu_get_event_code(event_code) == SCU_EVENT_POST_RNC_INVALIDATE_COMPLETE) {
444 if (sci_rnc->destination_state == RNC_DEST_FINAL)
445 next_state = SCI_RNC_INITIAL;
446 else
447 next_state = SCI_RNC_POSTING;
448 sci_change_state(&sci_rnc->sm, next_state);
449 } else {
450 switch (scu_get_event_type(event_code)) {
451 case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
452 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
453
454
455 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
456 "%s: SCIC Remote Node Context 0x%p was "
457 "suspeneded by hardware while being "
458 "invalidated.\n", __func__, sci_rnc);
459 break;
460 default:
461 goto out;
462 }
463 }
464 break;
465 case SCI_RNC_RESUMING:
466 if (scu_get_event_code(event_code) == SCU_EVENT_POST_RCN_RELEASE) {
467 sci_change_state(&sci_rnc->sm, SCI_RNC_READY);
468 } else {
469 switch (scu_get_event_type(event_code)) {
470 case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
471 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
472
473
474 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
475 "%s: SCIC Remote Node Context 0x%p was "
476 "suspeneded by hardware while being resumed.\n",
477 __func__, sci_rnc);
478 break;
479 default:
480 goto out;
481 }
482 }
483 break;
484 case SCI_RNC_READY:
485 switch (scu_get_event_type(event_code)) {
486 case SCU_EVENT_TL_RNC_SUSPEND_TX:
487 sci_change_state(&sci_rnc->sm, SCI_RNC_TX_SUSPENDED);
488 sci_rnc->suspend_type = scu_get_event_type(event_code);
489 break;
490 case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
491 sci_change_state(&sci_rnc->sm, SCI_RNC_TX_RX_SUSPENDED);
492 sci_rnc->suspend_type = scu_get_event_type(event_code);
493 break;
494 default:
495 goto out;
496 }
497 break;
498 case SCI_RNC_AWAIT_SUSPENSION:
499 switch (scu_get_event_type(event_code)) {
500 case SCU_EVENT_TL_RNC_SUSPEND_TX:
501 next_state = SCI_RNC_TX_SUSPENDED;
502 break;
503 case SCU_EVENT_TL_RNC_SUSPEND_TX_RX:
504 next_state = SCI_RNC_TX_RX_SUSPENDED;
505 break;
506 default:
507 goto out;
508 }
509 if (sci_rnc->suspend_type == scu_get_event_type(event_code))
510 sci_change_state(&sci_rnc->sm, next_state);
511 break;
512 default:
513 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
514 "%s: invalid state: %s\n", __func__,
515 rnc_state_name(state));
516 return SCI_FAILURE_INVALID_STATE;
517 }
518 return SCI_SUCCESS;
519
520 out:
521 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
522 "%s: code: %#x state: %s\n", __func__, event_code,
523 rnc_state_name(state));
524 return SCI_FAILURE;
525
526}
527
528enum sci_status sci_remote_node_context_destruct(struct sci_remote_node_context *sci_rnc,
529 scics_sds_remote_node_context_callback cb_fn,
530 void *cb_p)
531{
532 enum scis_sds_remote_node_context_states state;
533
534 state = sci_rnc->sm.current_state_id;
535 switch (state) {
536 case SCI_RNC_INVALIDATING:
537 sci_remote_node_context_setup_to_destroy(sci_rnc, cb_fn, cb_p);
538 return SCI_SUCCESS;
539 case SCI_RNC_POSTING:
540 case SCI_RNC_RESUMING:
541 case SCI_RNC_READY:
542 case SCI_RNC_TX_SUSPENDED:
543 case SCI_RNC_TX_RX_SUSPENDED:
544 sci_remote_node_context_setup_to_destroy(sci_rnc, cb_fn, cb_p);
545 sci_change_state(&sci_rnc->sm, SCI_RNC_INVALIDATING);
546 return SCI_SUCCESS;
547 case SCI_RNC_AWAIT_SUSPENSION:
548 sci_remote_node_context_setup_to_destroy(sci_rnc, cb_fn, cb_p);
549 return SCI_SUCCESS;
550 case SCI_RNC_INITIAL:
551 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
552 "%s: invalid state: %s\n", __func__,
553 rnc_state_name(state));
554
555
556
557
558 return SCI_SUCCESS;
559 default:
560 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
561 "%s: invalid state %s\n", __func__,
562 rnc_state_name(state));
563 return SCI_FAILURE_INVALID_STATE;
564 }
565}
566
567enum sci_status sci_remote_node_context_suspend(
568 struct sci_remote_node_context *sci_rnc,
569 enum sci_remote_node_suspension_reasons suspend_reason,
570 u32 suspend_type)
571{
572 enum scis_sds_remote_node_context_states state
573 = sci_rnc->sm.current_state_id;
574 struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
575 enum sci_status status = SCI_FAILURE_INVALID_STATE;
576 enum sci_remote_node_context_destination_state dest_param =
577 RNC_DEST_UNSPECIFIED;
578
579 dev_dbg(scirdev_to_dev(idev),
580 "%s: current state %s, current suspend_type %x dest state %d,"
581 " arg suspend_reason %d, arg suspend_type %x",
582 __func__, rnc_state_name(state), sci_rnc->suspend_type,
583 sci_rnc->destination_state, suspend_reason,
584 suspend_type);
585
586
587 if ((suspend_reason == SCI_HW_SUSPEND) ||
588 (sci_rnc->destination_state == RNC_DEST_FINAL))
589 dest_param = sci_rnc->destination_state;
590
591 switch (state) {
592 case SCI_RNC_READY:
593 break;
594 case SCI_RNC_INVALIDATING:
595 if (sci_rnc->destination_state == RNC_DEST_FINAL) {
596 dev_warn(scirdev_to_dev(idev),
597 "%s: already destroying %p\n",
598 __func__, sci_rnc);
599 return SCI_FAILURE_INVALID_STATE;
600 }
601
602 case SCI_RNC_RESUMING:
603
604 case SCI_RNC_POSTING:
605
606
607
608
609 if (sci_rnc->destination_state != RNC_DEST_FINAL)
610 sci_rnc->destination_state = RNC_DEST_SUSPENDED;
611 sci_rnc->suspend_type = suspend_type;
612 sci_rnc->suspend_reason = suspend_reason;
613 return SCI_SUCCESS;
614
615 case SCI_RNC_TX_SUSPENDED:
616 if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX)
617 status = SCI_SUCCESS;
618 break;
619 case SCI_RNC_TX_RX_SUSPENDED:
620 if (suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX)
621 status = SCI_SUCCESS;
622 break;
623 case SCI_RNC_AWAIT_SUSPENSION:
624 if ((sci_rnc->suspend_type == SCU_EVENT_TL_RNC_SUSPEND_TX_RX)
625 || (suspend_type == sci_rnc->suspend_type))
626 return SCI_SUCCESS;
627 break;
628 default:
629 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
630 "%s: invalid state %s\n", __func__,
631 rnc_state_name(state));
632 return SCI_FAILURE_INVALID_STATE;
633 }
634 sci_rnc->destination_state = dest_param;
635 sci_rnc->suspend_type = suspend_type;
636 sci_rnc->suspend_reason = suspend_reason;
637
638 if (status == SCI_SUCCESS) {
639 struct isci_host *ihost = idev->owning_port->owning_controller;
640
641 wake_up_all(&ihost->eventq);
642 return SCI_SUCCESS;
643 }
644 if ((suspend_reason == SCI_SW_SUSPEND_NORMAL) ||
645 (suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT)) {
646
647 if (suspend_reason == SCI_SW_SUSPEND_LINKHANG_DETECT)
648 isci_dev_set_hang_detection_timeout(idev, 0x00000001);
649
650 sci_remote_device_post_request(
651 idev, SCI_SOFTWARE_SUSPEND_CMD);
652 }
653 if (state != SCI_RNC_AWAIT_SUSPENSION)
654 sci_change_state(&sci_rnc->sm, SCI_RNC_AWAIT_SUSPENSION);
655
656 return SCI_SUCCESS;
657}
658
659enum sci_status sci_remote_node_context_resume(struct sci_remote_node_context *sci_rnc,
660 scics_sds_remote_node_context_callback cb_fn,
661 void *cb_p)
662{
663 enum scis_sds_remote_node_context_states state;
664 struct isci_remote_device *idev = rnc_to_dev(sci_rnc);
665
666 state = sci_rnc->sm.current_state_id;
667 dev_dbg(scirdev_to_dev(idev),
668 "%s: state %s, cb_fn = %p, cb_p = %p; dest_state = %d; "
669 "dev resume path %s\n",
670 __func__, rnc_state_name(state), cb_fn, cb_p,
671 sci_rnc->destination_state,
672 test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)
673 ? "<abort active>" : "<normal>");
674
675 switch (state) {
676 case SCI_RNC_INITIAL:
677 if (sci_rnc->remote_node_index == SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX)
678 return SCI_FAILURE_INVALID_STATE;
679
680 sci_remote_node_context_setup_to_resume(sci_rnc, cb_fn, cb_p,
681 RNC_DEST_READY);
682 if (!test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)) {
683 sci_remote_node_context_construct_buffer(sci_rnc);
684 sci_change_state(&sci_rnc->sm, SCI_RNC_POSTING);
685 }
686 return SCI_SUCCESS;
687
688 case SCI_RNC_POSTING:
689 case SCI_RNC_INVALIDATING:
690 case SCI_RNC_RESUMING:
691
692
693
694 switch (sci_rnc->destination_state) {
695 case RNC_DEST_SUSPENDED:
696 case RNC_DEST_SUSPENDED_RESUME:
697
698
699
700 sci_remote_node_context_setup_to_resume(
701 sci_rnc, cb_fn, cb_p,
702 RNC_DEST_SUSPENDED_RESUME);
703 break;
704 default:
705 sci_remote_node_context_setup_to_resume(
706 sci_rnc, cb_fn, cb_p,
707 RNC_DEST_READY);
708 break;
709 }
710 return SCI_SUCCESS;
711
712 case SCI_RNC_TX_SUSPENDED:
713 case SCI_RNC_TX_RX_SUSPENDED:
714 {
715 struct domain_device *dev = idev->domain_dev;
716
717
718
719
720
721 sci_remote_node_context_setup_to_resume(
722 sci_rnc, cb_fn, cb_p, RNC_DEST_READY);
723
724 if (!test_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags)) {
725 if ((dev_is_sata(dev) && dev->parent) ||
726 (sci_rnc->destination_state == RNC_DEST_FINAL))
727 sci_change_state(&sci_rnc->sm,
728 SCI_RNC_INVALIDATING);
729 else
730 sci_change_state(&sci_rnc->sm,
731 SCI_RNC_RESUMING);
732 }
733 }
734 return SCI_SUCCESS;
735
736 case SCI_RNC_AWAIT_SUSPENSION:
737 sci_remote_node_context_setup_to_resume(
738 sci_rnc, cb_fn, cb_p, RNC_DEST_SUSPENDED_RESUME);
739 return SCI_SUCCESS;
740 default:
741 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
742 "%s: invalid state %s\n", __func__,
743 rnc_state_name(state));
744 return SCI_FAILURE_INVALID_STATE;
745 }
746}
747
748enum sci_status sci_remote_node_context_start_io(struct sci_remote_node_context *sci_rnc,
749 struct isci_request *ireq)
750{
751 enum scis_sds_remote_node_context_states state;
752
753 state = sci_rnc->sm.current_state_id;
754
755 switch (state) {
756 case SCI_RNC_READY:
757 return SCI_SUCCESS;
758 case SCI_RNC_TX_SUSPENDED:
759 case SCI_RNC_TX_RX_SUSPENDED:
760 case SCI_RNC_AWAIT_SUSPENSION:
761 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
762 "%s: invalid state %s\n", __func__,
763 rnc_state_name(state));
764 return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED;
765 default:
766 dev_dbg(scirdev_to_dev(rnc_to_dev(sci_rnc)),
767 "%s: invalid state %s\n", __func__,
768 rnc_state_name(state));
769 return SCI_FAILURE_INVALID_STATE;
770 }
771}
772
773enum sci_status sci_remote_node_context_start_task(
774 struct sci_remote_node_context *sci_rnc,
775 struct isci_request *ireq,
776 scics_sds_remote_node_context_callback cb_fn,
777 void *cb_p)
778{
779 enum sci_status status = sci_remote_node_context_resume(sci_rnc,
780 cb_fn, cb_p);
781 if (status != SCI_SUCCESS)
782 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
783 "%s: resume failed: %d\n", __func__, status);
784 return status;
785}
786
787int sci_remote_node_context_is_safe_to_abort(
788 struct sci_remote_node_context *sci_rnc)
789{
790 enum scis_sds_remote_node_context_states state;
791
792 state = sci_rnc->sm.current_state_id;
793 switch (state) {
794 case SCI_RNC_INVALIDATING:
795 case SCI_RNC_TX_RX_SUSPENDED:
796 return 1;
797 case SCI_RNC_POSTING:
798 case SCI_RNC_RESUMING:
799 case SCI_RNC_READY:
800 case SCI_RNC_TX_SUSPENDED:
801 case SCI_RNC_AWAIT_SUSPENSION:
802 case SCI_RNC_INITIAL:
803 return 0;
804 default:
805 dev_warn(scirdev_to_dev(rnc_to_dev(sci_rnc)),
806 "%s: invalid state %d\n", __func__, state);
807 return 0;
808 }
809}
810