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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 SAS_DPRINTK("%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 SAS_DPRINTK("%s: SAS error %x\n", __func__,
155 stat->stat);
156
157 if (!link->sactive) {
158 qc->err_mask = ac;
159 } else {
160 link->eh_info.err_mask |= AC_ERR_DEV;
161 qc->flags |= ATA_QCFLAG_FAILED;
162 }
163
164 dev->sata_dev.fis[3] = 0x04;
165 dev->sata_dev.fis[2] = ATA_ERR;
166 }
167 }
168
169 qc->lldd_task = NULL;
170 ata_qc_complete(qc);
171 spin_unlock_irqrestore(ap->lock, flags);
172
173qc_already_gone:
174 sas_free_task(task);
175}
176
177static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
178{
179 unsigned long flags;
180 struct sas_task *task;
181 struct scatterlist *sg;
182 int ret = AC_ERR_SYSTEM;
183 unsigned int si, xfer = 0;
184 struct ata_port *ap = qc->ap;
185 struct domain_device *dev = ap->private_data;
186 struct sas_ha_struct *sas_ha = dev->port->ha;
187 struct Scsi_Host *host = sas_ha->core.shost;
188 struct sas_internal *i = to_sas_internal(host->transportt);
189
190
191
192
193 local_irq_save(flags);
194 spin_unlock(ap->lock);
195
196
197 if (test_bit(SAS_DEV_GONE, &dev->state))
198 goto out;
199
200 task = sas_alloc_task(GFP_ATOMIC);
201 if (!task)
202 goto out;
203 task->dev = dev;
204 task->task_proto = SAS_PROTOCOL_STP;
205 task->task_done = sas_ata_task_done;
206
207 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
208 qc->tf.command == ATA_CMD_FPDMA_READ ||
209 qc->tf.command == ATA_CMD_FPDMA_RECV ||
210 qc->tf.command == ATA_CMD_FPDMA_SEND ||
211 qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
212
213 qc->tf.nsect = 0;
214 }
215
216 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *)&task->ata_task.fis);
217 task->uldd_task = qc;
218 if (ata_is_atapi(qc->tf.protocol)) {
219 memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
220 task->total_xfer_len = qc->nbytes;
221 task->num_scatter = qc->n_elem;
222 } else {
223 for_each_sg(qc->sg, sg, qc->n_elem, si)
224 xfer += sg->length;
225
226 task->total_xfer_len = xfer;
227 task->num_scatter = si;
228 }
229
230 task->data_dir = qc->dma_dir;
231 task->scatter = qc->sg;
232 task->ata_task.retry_count = 1;
233 task->task_state_flags = SAS_TASK_STATE_PENDING;
234 qc->lldd_task = task;
235
236 switch (qc->tf.protocol) {
237 case ATA_PROT_NCQ:
238 task->ata_task.use_ncq = 1;
239
240 case ATAPI_PROT_DMA:
241 case ATA_PROT_DMA:
242 task->ata_task.dma_xfer = 1;
243 break;
244 }
245
246 if (qc->scsicmd)
247 ASSIGN_SAS_TASK(qc->scsicmd, task);
248
249 ret = i->dft->lldd_execute_task(task, GFP_ATOMIC);
250 if (ret) {
251 SAS_DPRINTK("lldd_execute_task returned: %d\n", ret);
252
253 if (qc->scsicmd)
254 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
255 sas_free_task(task);
256 ret = AC_ERR_SYSTEM;
257 }
258
259 out:
260 spin_lock(ap->lock);
261 local_irq_restore(flags);
262 return ret;
263}
264
265static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc)
266{
267 struct domain_device *dev = qc->ap->private_data;
268
269 ata_tf_from_fis(dev->sata_dev.fis, &qc->result_tf);
270 return true;
271}
272
273static struct sas_internal *dev_to_sas_internal(struct domain_device *dev)
274{
275 return to_sas_internal(dev->port->ha->core.shost->transportt);
276}
277
278static int sas_get_ata_command_set(struct domain_device *dev);
279
280int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
281{
282 if (phy->attached_tproto & SAS_PROTOCOL_STP)
283 dev->tproto = phy->attached_tproto;
284 if (phy->attached_sata_dev)
285 dev->tproto |= SAS_SATA_DEV;
286
287 if (phy->attached_dev_type == SAS_SATA_PENDING)
288 dev->dev_type = SAS_SATA_PENDING;
289 else {
290 int res;
291
292 dev->dev_type = SAS_SATA_DEV;
293 res = sas_get_report_phy_sata(dev->parent, phy->phy_id,
294 &dev->sata_dev.rps_resp);
295 if (res) {
296 SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
297 "0x%x\n", SAS_ADDR(dev->parent->sas_addr),
298 phy->phy_id, res);
299 return res;
300 }
301 memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis,
302 sizeof(struct dev_to_host_fis));
303 dev->sata_dev.class = sas_get_ata_command_set(dev);
304 }
305 return 0;
306}
307
308static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy)
309{
310 int res;
311
312
313 if (dev->dev_type != SAS_SATA_PENDING)
314 return 1;
315
316
317
318
319 res = sas_get_ata_info(dev, phy);
320 if (res)
321 return 0;
322 else
323 return 1;
324}
325
326static int smp_ata_check_ready(struct ata_link *link)
327{
328 int res;
329 struct ata_port *ap = link->ap;
330 struct domain_device *dev = ap->private_data;
331 struct domain_device *ex_dev = dev->parent;
332 struct sas_phy *phy = sas_get_local_phy(dev);
333 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number];
334
335 res = sas_ex_phy_discover(ex_dev, phy->number);
336 sas_put_local_phy(phy);
337
338
339
340
341 if (res == -ECOMM)
342 return res;
343 if (res != SMP_RESP_FUNC_ACC)
344 return 0;
345
346 switch (ex_phy->attached_dev_type) {
347 case SAS_SATA_PENDING:
348 return 0;
349 case SAS_END_DEVICE:
350 if (ex_phy->attached_sata_dev)
351 return sas_ata_clear_pending(dev, ex_phy);
352 default:
353 return -ENODEV;
354 }
355}
356
357static int local_ata_check_ready(struct ata_link *link)
358{
359 struct ata_port *ap = link->ap;
360 struct domain_device *dev = ap->private_data;
361 struct sas_internal *i = dev_to_sas_internal(dev);
362
363 if (i->dft->lldd_ata_check_ready)
364 return i->dft->lldd_ata_check_ready(dev);
365 else {
366
367
368
369
370 return 1;
371 }
372}
373
374static int sas_ata_printk(const char *level, const struct domain_device *ddev,
375 const char *fmt, ...)
376{
377 struct ata_port *ap = ddev->sata_dev.ap;
378 struct device *dev = &ddev->rphy->dev;
379 struct va_format vaf;
380 va_list args;
381 int r;
382
383 va_start(args, fmt);
384
385 vaf.fmt = fmt;
386 vaf.va = &args;
387
388 r = printk("%ssas: ata%u: %s: %pV",
389 level, ap->print_id, dev_name(dev), &vaf);
390
391 va_end(args);
392
393 return r;
394}
395
396static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
397 unsigned long deadline)
398{
399 int ret = 0, res;
400 struct sas_phy *phy;
401 struct ata_port *ap = link->ap;
402 int (*check_ready)(struct ata_link *link);
403 struct domain_device *dev = ap->private_data;
404 struct sas_internal *i = dev_to_sas_internal(dev);
405
406 res = i->dft->lldd_I_T_nexus_reset(dev);
407 if (res == -ENODEV)
408 return res;
409
410 if (res != TMF_RESP_FUNC_COMPLETE)
411 sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n");
412
413 phy = sas_get_local_phy(dev);
414 if (scsi_is_sas_phy_local(phy))
415 check_ready = local_ata_check_ready;
416 else
417 check_ready = smp_ata_check_ready;
418 sas_put_local_phy(phy);
419
420 ret = ata_wait_after_reset(link, deadline, check_ready);
421 if (ret && ret != -EAGAIN)
422 sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret);
423
424 *class = dev->sata_dev.class;
425
426 ap->cbl = ATA_CBL_SATA;
427 return ret;
428}
429
430
431
432
433
434static void sas_ata_internal_abort(struct sas_task *task)
435{
436 struct sas_internal *si = dev_to_sas_internal(task->dev);
437 unsigned long flags;
438 int res;
439
440 spin_lock_irqsave(&task->task_state_lock, flags);
441 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
442 task->task_state_flags & SAS_TASK_STATE_DONE) {
443 spin_unlock_irqrestore(&task->task_state_lock, flags);
444 SAS_DPRINTK("%s: Task %p already finished.\n", __func__,
445 task);
446 goto out;
447 }
448 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
449 spin_unlock_irqrestore(&task->task_state_lock, flags);
450
451 res = si->dft->lldd_abort_task(task);
452
453 spin_lock_irqsave(&task->task_state_lock, flags);
454 if (task->task_state_flags & SAS_TASK_STATE_DONE ||
455 res == TMF_RESP_FUNC_COMPLETE) {
456 spin_unlock_irqrestore(&task->task_state_lock, flags);
457 goto out;
458 }
459
460
461
462
463
464
465 SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task);
466
467 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
468 task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
469 spin_unlock_irqrestore(&task->task_state_lock, flags);
470
471 return;
472 out:
473 sas_free_task(task);
474}
475
476static void sas_ata_post_internal(struct ata_queued_cmd *qc)
477{
478 if (qc->flags & ATA_QCFLAG_FAILED)
479 qc->err_mask |= AC_ERR_OTHER;
480
481 if (qc->err_mask) {
482
483
484
485
486
487
488
489
490 struct sas_task *task = qc->lldd_task;
491
492 qc->lldd_task = NULL;
493 if (!task)
494 return;
495 task->uldd_task = NULL;
496 sas_ata_internal_abort(task);
497 }
498}
499
500
501static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
502{
503 struct domain_device *dev = ap->private_data;
504 struct sas_internal *i = dev_to_sas_internal(dev);
505
506 if (i->dft->lldd_ata_set_dmamode)
507 i->dft->lldd_ata_set_dmamode(dev);
508}
509
510static void sas_ata_sched_eh(struct ata_port *ap)
511{
512 struct domain_device *dev = ap->private_data;
513 struct sas_ha_struct *ha = dev->port->ha;
514 unsigned long flags;
515
516 spin_lock_irqsave(&ha->lock, flags);
517 if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state))
518 ha->eh_active++;
519 ata_std_sched_eh(ap);
520 spin_unlock_irqrestore(&ha->lock, flags);
521}
522
523void sas_ata_end_eh(struct ata_port *ap)
524{
525 struct domain_device *dev = ap->private_data;
526 struct sas_ha_struct *ha = dev->port->ha;
527 unsigned long flags;
528
529 spin_lock_irqsave(&ha->lock, flags);
530 if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state))
531 ha->eh_active--;
532 spin_unlock_irqrestore(&ha->lock, flags);
533}
534
535static struct ata_port_operations sas_sata_ops = {
536 .prereset = ata_std_prereset,
537 .hardreset = sas_ata_hard_reset,
538 .postreset = ata_std_postreset,
539 .error_handler = ata_std_error_handler,
540 .post_internal_cmd = sas_ata_post_internal,
541 .qc_defer = ata_std_qc_defer,
542 .qc_prep = ata_noop_qc_prep,
543 .qc_issue = sas_ata_qc_issue,
544 .qc_fill_rtf = sas_ata_qc_fill_rtf,
545 .port_start = ata_sas_port_start,
546 .port_stop = ata_sas_port_stop,
547 .set_dmamode = sas_ata_set_dmamode,
548 .sched_eh = sas_ata_sched_eh,
549 .end_eh = sas_ata_end_eh,
550};
551
552static struct ata_port_info sata_port_info = {
553 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ |
554 ATA_FLAG_SAS_HOST | ATA_FLAG_FPDMA_AUX,
555 .pio_mask = ATA_PIO4,
556 .mwdma_mask = ATA_MWDMA2,
557 .udma_mask = ATA_UDMA6,
558 .port_ops = &sas_sata_ops
559};
560
561int sas_ata_init(struct domain_device *found_dev)
562{
563 struct sas_ha_struct *ha = found_dev->port->ha;
564 struct Scsi_Host *shost = ha->core.shost;
565 struct ata_port *ap;
566 int rc;
567
568 ata_host_init(&found_dev->sata_dev.ata_host, ha->dev, &sas_sata_ops);
569 ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
570 &sata_port_info,
571 shost);
572 if (!ap) {
573 SAS_DPRINTK("ata_sas_port_alloc failed.\n");
574 return -ENODEV;
575 }
576
577 ap->private_data = found_dev;
578 ap->cbl = ATA_CBL_SATA;
579 ap->scsi_host = shost;
580 rc = ata_sas_port_init(ap);
581 if (rc) {
582 ata_sas_port_destroy(ap);
583 return rc;
584 }
585 found_dev->sata_dev.ap = ap;
586
587 return 0;
588}
589
590void sas_ata_task_abort(struct sas_task *task)
591{
592 struct ata_queued_cmd *qc = task->uldd_task;
593 struct completion *waiting;
594
595
596 if (qc->scsicmd) {
597 struct request_queue *q = qc->scsicmd->device->request_queue;
598 unsigned long flags;
599
600 spin_lock_irqsave(q->queue_lock, flags);
601 blk_abort_request(qc->scsicmd->request);
602 spin_unlock_irqrestore(q->queue_lock, flags);
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_disabled(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 sas_discover_event(dev->port, DISCE_PROBE);
739 return 0;
740}
741
742static void async_sas_ata_eh(void *data, async_cookie_t cookie)
743{
744 struct domain_device *dev = data;
745 struct ata_port *ap = dev->sata_dev.ap;
746 struct sas_ha_struct *ha = dev->port->ha;
747
748 sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n");
749 ata_scsi_port_error_handler(ha->core.shost, ap);
750 sas_put_device(dev);
751}
752
753void sas_ata_strategy_handler(struct Scsi_Host *shost)
754{
755 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
756 ASYNC_DOMAIN_EXCLUSIVE(async);
757 int i;
758
759
760
761
762
763
764
765
766
767 sas_disable_revalidation(sas_ha);
768
769 spin_lock_irq(&sas_ha->phy_port_lock);
770 for (i = 0; i < sas_ha->num_phys; i++) {
771 struct asd_sas_port *port = sas_ha->sas_port[i];
772 struct domain_device *dev;
773
774 spin_lock(&port->dev_list_lock);
775 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
776 if (!dev_is_sata(dev))
777 continue;
778
779
780
781
782
783 kref_get(&dev->kref);
784
785 async_schedule_domain(async_sas_ata_eh, dev, &async);
786 }
787 spin_unlock(&port->dev_list_lock);
788 }
789 spin_unlock_irq(&sas_ha->phy_port_lock);
790
791 async_synchronize_full_domain(&async);
792
793 sas_enable_revalidation(sas_ha);
794}
795
796void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
797 struct list_head *done_q)
798{
799 struct scsi_cmnd *cmd, *n;
800 struct domain_device *eh_dev;
801
802 do {
803 LIST_HEAD(sata_q);
804 eh_dev = NULL;
805
806 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
807 struct domain_device *ddev = cmd_to_domain_dev(cmd);
808
809 if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd))
810 continue;
811 if (eh_dev && eh_dev != ddev)
812 continue;
813 eh_dev = ddev;
814 list_move(&cmd->eh_entry, &sata_q);
815 }
816
817 if (!list_empty(&sata_q)) {
818 struct ata_port *ap = eh_dev->sata_dev.ap;
819
820 sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n");
821 ata_scsi_cmd_error_handler(shost, ap, &sata_q);
822
823
824
825
826
827
828
829
830
831
832
833 while (!list_empty(&sata_q))
834 list_del_init(sata_q.next);
835 }
836 } while (eh_dev);
837}
838
839void sas_ata_schedule_reset(struct domain_device *dev)
840{
841 struct ata_eh_info *ehi;
842 struct ata_port *ap;
843 unsigned long flags;
844
845 if (!dev_is_sata(dev))
846 return;
847
848 ap = dev->sata_dev.ap;
849 ehi = &ap->link.eh_info;
850
851 spin_lock_irqsave(ap->lock, flags);
852 ehi->err_mask |= AC_ERR_TIMEOUT;
853 ehi->action |= ATA_EH_RESET;
854 ata_port_schedule_eh(ap);
855 spin_unlock_irqrestore(ap->lock, flags);
856}
857EXPORT_SYMBOL_GPL(sas_ata_schedule_reset);
858
859void sas_ata_wait_eh(struct domain_device *dev)
860{
861 struct ata_port *ap;
862
863 if (!dev_is_sata(dev))
864 return;
865
866 ap = dev->sata_dev.ap;
867 ata_port_wait_eh(ap);
868}
869