1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24#include <linux/scatterlist.h>
25#include <linux/slab.h>
26#include <linux/async.h>
27#include <linux/export.h>
28
29#include <scsi/sas_ata.h>
30#include "sas_internal.h"
31#include <scsi/scsi_host.h>
32#include <scsi/scsi_device.h>
33#include <scsi/scsi_tcq.h>
34#include <scsi/scsi.h>
35#include <scsi/scsi_transport.h>
36#include <scsi/scsi_transport_sas.h>
37#include "../scsi_sas_internal.h"
38#include "../scsi_transport_api.h"
39#include <scsi/scsi_eh.h>
40
41static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
42{
43
44
45
46 if (ts->resp == SAS_TASK_UNDELIVERED)
47 return AC_ERR_ATA_BUS;
48
49
50
51 switch (ts->stat) {
52 case SAS_DEV_NO_RESPONSE:
53 return AC_ERR_TIMEOUT;
54
55 case SAS_INTERRUPTED:
56 case SAS_PHY_DOWN:
57 case SAS_NAK_R_ERR:
58 return AC_ERR_ATA_BUS;
59
60
61 case SAS_DATA_UNDERRUN:
62
63
64
65
66
67
68 return 0;
69
70 case SAS_DATA_OVERRUN:
71 case SAS_QUEUE_FULL:
72 case SAS_DEVICE_UNKNOWN:
73 case SAS_SG_ERR:
74 return AC_ERR_INVALID;
75
76 case SAS_OPEN_TO:
77 case SAS_OPEN_REJECT:
78 pr_warn("%s: Saw error %d. What to do?\n",
79 __func__, ts->stat);
80 return AC_ERR_OTHER;
81
82 case SAM_STAT_CHECK_CONDITION:
83 case SAS_ABORTED_TASK:
84 return AC_ERR_DEV;
85
86 case SAS_PROTO_RESPONSE:
87
88
89 return 0;
90 default:
91 return 0;
92 }
93}
94
95static void sas_ata_task_done(struct sas_task *task)
96{
97 struct ata_queued_cmd *qc = task->uldd_task;
98 struct domain_device *dev = task->dev;
99 struct task_status_struct *stat = &task->task_status;
100 struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
101 struct sas_ha_struct *sas_ha = dev->port->ha;
102 enum ata_completion_errors ac;
103 unsigned long flags;
104 struct ata_link *link;
105 struct ata_port *ap;
106
107 spin_lock_irqsave(&dev->done_lock, flags);
108 if (test_bit(SAS_HA_FROZEN, &sas_ha->state))
109 task = NULL;
110 else if (qc && qc->scsicmd)
111 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
112 spin_unlock_irqrestore(&dev->done_lock, flags);
113
114
115 if (unlikely(!task))
116 return;
117
118 if (!qc)
119 goto qc_already_gone;
120
121 ap = qc->ap;
122 link = &ap->link;
123
124 spin_lock_irqsave(ap->lock, flags);
125
126 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) {
127 spin_unlock_irqrestore(ap->lock, flags);
128 if (qc->scsicmd)
129 goto qc_already_gone;
130 else {
131
132
133
134
135 return;
136 }
137 }
138
139 if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
140 ((stat->stat == SAM_STAT_CHECK_CONDITION &&
141 dev->sata_dev.class == ATA_DEV_ATAPI))) {
142 memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE);
143
144 if (!link->sactive) {
145 qc->err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
146 } else {
147 link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
148 if (unlikely(link->eh_info.err_mask))
149 qc->flags |= ATA_QCFLAG_FAILED;
150 }
151 } else {
152 ac = sas_to_ata_err(stat);
153 if (ac) {
154 pr_warn("%s: SAS error %x\n", __func__, stat->stat);
155
156 if (!link->sactive) {
157 qc->err_mask = ac;
158 } else {
159 link->eh_info.err_mask |= AC_ERR_DEV;
160 qc->flags |= ATA_QCFLAG_FAILED;
161 }
162
163 dev->sata_dev.fis[3] = 0x04;
164 dev->sata_dev.fis[2] = ATA_ERR;
165 }
166 }
167
168 qc->lldd_task = NULL;
169 ata_qc_complete(qc);
170 spin_unlock_irqrestore(ap->lock, flags);
171
172qc_already_gone:
173 sas_free_task(task);
174}
175
176static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
177{
178 struct sas_task *task;
179 struct scatterlist *sg;
180 int ret = AC_ERR_SYSTEM;
181 unsigned int si, xfer = 0;
182 struct ata_port *ap = qc->ap;
183 struct domain_device *dev = ap->private_data;
184 struct sas_ha_struct *sas_ha = dev->port->ha;
185 struct Scsi_Host *host = sas_ha->core.shost;
186 struct sas_internal *i = to_sas_internal(host->transportt);
187
188
189 spin_unlock(ap->lock);
190
191
192 if (test_bit(SAS_DEV_GONE, &dev->state))
193 goto out;
194
195 task = sas_alloc_task(GFP_ATOMIC);
196 if (!task)
197 goto out;
198 task->dev = dev;
199 task->task_proto = SAS_PROTOCOL_STP;
200 task->task_done = sas_ata_task_done;
201
202 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
203 qc->tf.command == ATA_CMD_FPDMA_READ ||
204 qc->tf.command == ATA_CMD_FPDMA_RECV ||
205 qc->tf.command == ATA_CMD_FPDMA_SEND ||
206 qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
207
208 qc->tf.nsect = 0;
209 }
210
211 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *)&task->ata_task.fis);
212 task->uldd_task = qc;
213 if (ata_is_atapi(qc->tf.protocol)) {
214 memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
215 task->total_xfer_len = qc->nbytes;
216 task->num_scatter = qc->n_elem;
217 } else {
218 for_each_sg(qc->sg, sg, qc->n_elem, si)
219 xfer += sg_dma_len(sg);
220
221 task->total_xfer_len = xfer;
222 task->num_scatter = si;
223 }
224
225 task->data_dir = qc->dma_dir;
226 task->scatter = qc->sg;
227 task->ata_task.retry_count = 1;
228 task->task_state_flags = SAS_TASK_STATE_PENDING;
229 qc->lldd_task = task;
230
231 task->ata_task.use_ncq = ata_is_ncq(qc->tf.protocol);
232 task->ata_task.dma_xfer = ata_is_dma(qc->tf.protocol);
233
234 if (qc->scsicmd)
235 ASSIGN_SAS_TASK(qc->scsicmd, task);
236
237 ret = i->dft->lldd_execute_task(task, GFP_ATOMIC);
238 if (ret) {
239 pr_debug("lldd_execute_task returned: %d\n", ret);
240
241 if (qc->scsicmd)
242 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
243 sas_free_task(task);
244 qc->lldd_task = NULL;
245 ret = AC_ERR_SYSTEM;
246 }
247
248 out:
249 spin_lock(ap->lock);
250 return ret;
251}
252
253static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc)
254{
255 struct domain_device *dev = qc->ap->private_data;
256
257 ata_tf_from_fis(dev->sata_dev.fis, &qc->result_tf);
258 return true;
259}
260
261static struct sas_internal *dev_to_sas_internal(struct domain_device *dev)
262{
263 return to_sas_internal(dev->port->ha->core.shost->transportt);
264}
265
266static int sas_get_ata_command_set(struct domain_device *dev);
267
268int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
269{
270 if (phy->attached_tproto & SAS_PROTOCOL_STP)
271 dev->tproto = phy->attached_tproto;
272 if (phy->attached_sata_dev)
273 dev->tproto |= SAS_SATA_DEV;
274
275 if (phy->attached_dev_type == SAS_SATA_PENDING)
276 dev->dev_type = SAS_SATA_PENDING;
277 else {
278 int res;
279
280 dev->dev_type = SAS_SATA_DEV;
281 res = sas_get_report_phy_sata(dev->parent, phy->phy_id,
282 &dev->sata_dev.rps_resp);
283 if (res) {
284 pr_debug("report phy sata to %016llx:0x%x returned 0x%x\n",
285 SAS_ADDR(dev->parent->sas_addr),
286 phy->phy_id, res);
287 return res;
288 }
289 memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis,
290 sizeof(struct dev_to_host_fis));
291 dev->sata_dev.class = sas_get_ata_command_set(dev);
292 }
293 return 0;
294}
295
296static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy)
297{
298 int res;
299
300
301 if (dev->dev_type != SAS_SATA_PENDING)
302 return 1;
303
304
305
306
307 res = sas_get_ata_info(dev, phy);
308 if (res)
309 return 0;
310 else
311 return 1;
312}
313
314static int smp_ata_check_ready(struct ata_link *link)
315{
316 int res;
317 struct ata_port *ap = link->ap;
318 struct domain_device *dev = ap->private_data;
319 struct domain_device *ex_dev = dev->parent;
320 struct sas_phy *phy = sas_get_local_phy(dev);
321 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number];
322
323 res = sas_ex_phy_discover(ex_dev, phy->number);
324 sas_put_local_phy(phy);
325
326
327
328
329 if (res == -ECOMM)
330 return res;
331 if (res != SMP_RESP_FUNC_ACC)
332 return 0;
333
334 switch (ex_phy->attached_dev_type) {
335 case SAS_SATA_PENDING:
336 return 0;
337 case SAS_END_DEVICE:
338 if (ex_phy->attached_sata_dev)
339 return sas_ata_clear_pending(dev, ex_phy);
340
341 default:
342 return -ENODEV;
343 }
344}
345
346static int local_ata_check_ready(struct ata_link *link)
347{
348 struct ata_port *ap = link->ap;
349 struct domain_device *dev = ap->private_data;
350 struct sas_internal *i = dev_to_sas_internal(dev);
351
352 if (i->dft->lldd_ata_check_ready)
353 return i->dft->lldd_ata_check_ready(dev);
354 else {
355
356
357
358
359 return 1;
360 }
361}
362
363static int sas_ata_printk(const char *level, const struct domain_device *ddev,
364 const char *fmt, ...)
365{
366 struct ata_port *ap = ddev->sata_dev.ap;
367 struct device *dev = &ddev->rphy->dev;
368 struct va_format vaf;
369 va_list args;
370 int r;
371
372 va_start(args, fmt);
373
374 vaf.fmt = fmt;
375 vaf.va = &args;
376
377 r = printk("%s" SAS_FMT "ata%u: %s: %pV",
378 level, ap->print_id, dev_name(dev), &vaf);
379
380 va_end(args);
381
382 return r;
383}
384
385static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
386 unsigned long deadline)
387{
388 int ret = 0, res;
389 struct sas_phy *phy;
390 struct ata_port *ap = link->ap;
391 int (*check_ready)(struct ata_link *link);
392 struct domain_device *dev = ap->private_data;
393 struct sas_internal *i = dev_to_sas_internal(dev);
394
395 res = i->dft->lldd_I_T_nexus_reset(dev);
396 if (res == -ENODEV)
397 return res;
398
399 if (res != TMF_RESP_FUNC_COMPLETE)
400 sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n");
401
402 phy = sas_get_local_phy(dev);
403 if (scsi_is_sas_phy_local(phy))
404 check_ready = local_ata_check_ready;
405 else
406 check_ready = smp_ata_check_ready;
407 sas_put_local_phy(phy);
408
409 ret = ata_wait_after_reset(link, deadline, check_ready);
410 if (ret && ret != -EAGAIN)
411 sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret);
412
413 *class = dev->sata_dev.class;
414
415 ap->cbl = ATA_CBL_SATA;
416 return ret;
417}
418
419
420
421
422
423static void sas_ata_internal_abort(struct sas_task *task)
424{
425 struct sas_internal *si = dev_to_sas_internal(task->dev);
426 unsigned long flags;
427 int res;
428
429 spin_lock_irqsave(&task->task_state_lock, flags);
430 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
431 task->task_state_flags & SAS_TASK_STATE_DONE) {
432 spin_unlock_irqrestore(&task->task_state_lock, flags);
433 pr_debug("%s: Task %p already finished.\n", __func__, task);
434 goto out;
435 }
436 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
437 spin_unlock_irqrestore(&task->task_state_lock, flags);
438
439 res = si->dft->lldd_abort_task(task);
440
441 spin_lock_irqsave(&task->task_state_lock, flags);
442 if (task->task_state_flags & SAS_TASK_STATE_DONE ||
443 res == TMF_RESP_FUNC_COMPLETE) {
444 spin_unlock_irqrestore(&task->task_state_lock, flags);
445 goto out;
446 }
447
448
449
450
451
452
453 pr_warn("%s: Task %p leaked.\n", __func__, task);
454
455 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
456 task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
457 spin_unlock_irqrestore(&task->task_state_lock, flags);
458
459 return;
460 out:
461 sas_free_task(task);
462}
463
464static void sas_ata_post_internal(struct ata_queued_cmd *qc)
465{
466 if (qc->flags & ATA_QCFLAG_FAILED)
467 qc->err_mask |= AC_ERR_OTHER;
468
469 if (qc->err_mask) {
470
471
472
473
474
475
476
477
478 struct sas_task *task = qc->lldd_task;
479
480 qc->lldd_task = NULL;
481 if (!task)
482 return;
483 task->uldd_task = NULL;
484 sas_ata_internal_abort(task);
485 }
486}
487
488
489static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
490{
491 struct domain_device *dev = ap->private_data;
492 struct sas_internal *i = dev_to_sas_internal(dev);
493
494 if (i->dft->lldd_ata_set_dmamode)
495 i->dft->lldd_ata_set_dmamode(dev);
496}
497
498static void sas_ata_sched_eh(struct ata_port *ap)
499{
500 struct domain_device *dev = ap->private_data;
501 struct sas_ha_struct *ha = dev->port->ha;
502 unsigned long flags;
503
504 spin_lock_irqsave(&ha->lock, flags);
505 if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state))
506 ha->eh_active++;
507 ata_std_sched_eh(ap);
508 spin_unlock_irqrestore(&ha->lock, flags);
509}
510
511void sas_ata_end_eh(struct ata_port *ap)
512{
513 struct domain_device *dev = ap->private_data;
514 struct sas_ha_struct *ha = dev->port->ha;
515 unsigned long flags;
516
517 spin_lock_irqsave(&ha->lock, flags);
518 if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state))
519 ha->eh_active--;
520 spin_unlock_irqrestore(&ha->lock, flags);
521}
522
523static struct ata_port_operations sas_sata_ops = {
524 .prereset = ata_std_prereset,
525 .hardreset = sas_ata_hard_reset,
526 .postreset = ata_std_postreset,
527 .error_handler = ata_std_error_handler,
528 .post_internal_cmd = sas_ata_post_internal,
529 .qc_defer = ata_std_qc_defer,
530 .qc_prep = ata_noop_qc_prep,
531 .qc_issue = sas_ata_qc_issue,
532 .qc_fill_rtf = sas_ata_qc_fill_rtf,
533 .port_start = ata_sas_port_start,
534 .port_stop = ata_sas_port_stop,
535 .set_dmamode = sas_ata_set_dmamode,
536 .sched_eh = sas_ata_sched_eh,
537 .end_eh = sas_ata_end_eh,
538};
539
540static struct ata_port_info sata_port_info = {
541 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ |
542 ATA_FLAG_SAS_HOST | ATA_FLAG_FPDMA_AUX,
543 .pio_mask = ATA_PIO4,
544 .mwdma_mask = ATA_MWDMA2,
545 .udma_mask = ATA_UDMA6,
546 .port_ops = &sas_sata_ops
547};
548
549int sas_ata_init(struct domain_device *found_dev)
550{
551 struct sas_ha_struct *ha = found_dev->port->ha;
552 struct Scsi_Host *shost = ha->core.shost;
553 struct ata_host *ata_host;
554 struct ata_port *ap;
555 int rc;
556
557 ata_host = kzalloc(sizeof(*ata_host), GFP_KERNEL);
558 if (!ata_host) {
559 pr_err("ata host alloc failed.\n");
560 return -ENOMEM;
561 }
562
563 ata_host_init(ata_host, ha->dev, &sas_sata_ops);
564
565 ap = ata_sas_port_alloc(ata_host, &sata_port_info, shost);
566 if (!ap) {
567 pr_err("ata_sas_port_alloc failed.\n");
568 rc = -ENODEV;
569 goto free_host;
570 }
571
572 ap->private_data = found_dev;
573 ap->cbl = ATA_CBL_SATA;
574 ap->scsi_host = shost;
575 rc = ata_sas_port_init(ap);
576 if (rc)
577 goto destroy_port;
578
579 rc = ata_sas_tport_add(ata_host->dev, ap);
580 if (rc)
581 goto destroy_port;
582
583 found_dev->sata_dev.ata_host = ata_host;
584 found_dev->sata_dev.ap = ap;
585
586 return 0;
587
588destroy_port:
589 ata_sas_port_destroy(ap);
590free_host:
591 ata_host_put(ata_host);
592 return rc;
593}
594
595void sas_ata_task_abort(struct sas_task *task)
596{
597 struct ata_queued_cmd *qc = task->uldd_task;
598 struct completion *waiting;
599
600
601 if (qc->scsicmd) {
602 blk_abort_request(qc->scsicmd->request);
603 return;
604 }
605
606
607 qc->flags &= ~ATA_QCFLAG_ACTIVE;
608 qc->flags |= ATA_QCFLAG_FAILED;
609 qc->err_mask |= AC_ERR_TIMEOUT;
610 waiting = qc->private_data;
611 complete(waiting);
612}
613
614static int sas_get_ata_command_set(struct domain_device *dev)
615{
616 struct dev_to_host_fis *fis =
617 (struct dev_to_host_fis *) dev->frame_rcvd;
618 struct ata_taskfile tf;
619
620 if (dev->dev_type == SAS_SATA_PENDING)
621 return ATA_DEV_UNKNOWN;
622
623 ata_tf_from_fis((const u8 *)fis, &tf);
624
625 return ata_dev_classify(&tf);
626}
627
628void sas_probe_sata(struct asd_sas_port *port)
629{
630 struct domain_device *dev, *n;
631
632 mutex_lock(&port->ha->disco_mutex);
633 list_for_each_entry(dev, &port->disco_list, disco_list_node) {
634 if (!dev_is_sata(dev))
635 continue;
636
637 ata_sas_async_probe(dev->sata_dev.ap);
638 }
639 mutex_unlock(&port->ha->disco_mutex);
640
641 list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
642 if (!dev_is_sata(dev))
643 continue;
644
645 sas_ata_wait_eh(dev);
646
647
648
649
650 if (!ata_dev_enabled(sas_to_ata_dev(dev)))
651 sas_fail_probe(dev, __func__, -ENODEV);
652 }
653
654}
655
656static void sas_ata_flush_pm_eh(struct asd_sas_port *port, const char *func)
657{
658 struct domain_device *dev, *n;
659
660 list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) {
661 if (!dev_is_sata(dev))
662 continue;
663
664 sas_ata_wait_eh(dev);
665
666
667 if (ata_dev_disabled(sas_to_ata_dev(dev)))
668 sas_fail_probe(dev, func, -ENODEV);
669 }
670}
671
672void sas_suspend_sata(struct asd_sas_port *port)
673{
674 struct domain_device *dev;
675
676 mutex_lock(&port->ha->disco_mutex);
677 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
678 struct sata_device *sata;
679
680 if (!dev_is_sata(dev))
681 continue;
682
683 sata = &dev->sata_dev;
684 if (sata->ap->pm_mesg.event == PM_EVENT_SUSPEND)
685 continue;
686
687 ata_sas_port_suspend(sata->ap);
688 }
689 mutex_unlock(&port->ha->disco_mutex);
690
691 sas_ata_flush_pm_eh(port, __func__);
692}
693
694void sas_resume_sata(struct asd_sas_port *port)
695{
696 struct domain_device *dev;
697
698 mutex_lock(&port->ha->disco_mutex);
699 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
700 struct sata_device *sata;
701
702 if (!dev_is_sata(dev))
703 continue;
704
705 sata = &dev->sata_dev;
706 if (sata->ap->pm_mesg.event == PM_EVENT_ON)
707 continue;
708
709 ata_sas_port_resume(sata->ap);
710 }
711 mutex_unlock(&port->ha->disco_mutex);
712
713 sas_ata_flush_pm_eh(port, __func__);
714}
715
716
717
718
719
720
721
722
723
724int sas_discover_sata(struct domain_device *dev)
725{
726 int res;
727
728 if (dev->dev_type == SAS_SATA_PM)
729 return -ENODEV;
730
731 dev->sata_dev.class = sas_get_ata_command_set(dev);
732 sas_fill_in_rphy(dev, dev->rphy);
733
734 res = sas_notify_lldd_dev_found(dev);
735 if (res)
736 return res;
737
738 return 0;
739}
740
741static void async_sas_ata_eh(void *data, async_cookie_t cookie)
742{
743 struct domain_device *dev = data;
744 struct ata_port *ap = dev->sata_dev.ap;
745 struct sas_ha_struct *ha = dev->port->ha;
746
747 sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n");
748 ata_scsi_port_error_handler(ha->core.shost, ap);
749 sas_put_device(dev);
750}
751
752void sas_ata_strategy_handler(struct Scsi_Host *shost)
753{
754 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
755 ASYNC_DOMAIN_EXCLUSIVE(async);
756 int i;
757
758
759
760
761
762
763
764
765
766 sas_disable_revalidation(sas_ha);
767
768 spin_lock_irq(&sas_ha->phy_port_lock);
769 for (i = 0; i < sas_ha->num_phys; i++) {
770 struct asd_sas_port *port = sas_ha->sas_port[i];
771 struct domain_device *dev;
772
773 spin_lock(&port->dev_list_lock);
774 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
775 if (!dev_is_sata(dev))
776 continue;
777
778
779
780
781
782 kref_get(&dev->kref);
783
784 async_schedule_domain(async_sas_ata_eh, dev, &async);
785 }
786 spin_unlock(&port->dev_list_lock);
787 }
788 spin_unlock_irq(&sas_ha->phy_port_lock);
789
790 async_synchronize_full_domain(&async);
791
792 sas_enable_revalidation(sas_ha);
793}
794
795void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
796 struct list_head *done_q)
797{
798 struct scsi_cmnd *cmd, *n;
799 struct domain_device *eh_dev;
800
801 do {
802 LIST_HEAD(sata_q);
803 eh_dev = NULL;
804
805 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
806 struct domain_device *ddev = cmd_to_domain_dev(cmd);
807
808 if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd))
809 continue;
810 if (eh_dev && eh_dev != ddev)
811 continue;
812 eh_dev = ddev;
813 list_move(&cmd->eh_entry, &sata_q);
814 }
815
816 if (!list_empty(&sata_q)) {
817 struct ata_port *ap = eh_dev->sata_dev.ap;
818
819 sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n");
820 ata_scsi_cmd_error_handler(shost, ap, &sata_q);
821
822
823
824
825
826
827
828
829
830
831
832 while (!list_empty(&sata_q))
833 list_del_init(sata_q.next);
834 }
835 } while (eh_dev);
836}
837
838void sas_ata_schedule_reset(struct domain_device *dev)
839{
840 struct ata_eh_info *ehi;
841 struct ata_port *ap;
842 unsigned long flags;
843
844 if (!dev_is_sata(dev))
845 return;
846
847 ap = dev->sata_dev.ap;
848 ehi = &ap->link.eh_info;
849
850 spin_lock_irqsave(ap->lock, flags);
851 ehi->err_mask |= AC_ERR_TIMEOUT;
852 ehi->action |= ATA_EH_RESET;
853 ata_port_schedule_eh(ap);
854 spin_unlock_irqrestore(ap->lock, flags);
855}
856EXPORT_SYMBOL_GPL(sas_ata_schedule_reset);
857
858void sas_ata_wait_eh(struct domain_device *dev)
859{
860 struct ata_port *ap;
861
862 if (!dev_is_sata(dev))
863 return;
864
865 ap = dev->sata_dev.ap;
866 ata_port_wait_eh(ap);
867}
868