1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Support for SATA devices on Serial Attached SCSI (SAS) controllers
5 * Copyright (C) 2006 IBM Corporation
7 * Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
10 #include <linux/scatterlist.h>
11 #include <linux/slab.h>
12 #include <linux/async.h>
13 #include <linux/export.h>
15 #include <scsi/sas_ata.h>
16 #include "sas_internal.h"
17 #include <scsi/scsi_host.h>
18 #include <scsi/scsi_device.h>
19 #include <scsi/scsi_tcq.h>
20 #include <scsi/scsi.h>
21 #include <scsi/scsi_transport.h>
22 #include <scsi/scsi_transport_sas.h>
23 #include "scsi_sas_internal.h"
24 #include "scsi_transport_api.h"
25 #include <scsi/scsi_eh.h>
27 static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
29 /* Cheesy attempt to translate SAS errors into ATA. Hah! */
32 if (ts->resp == SAS_TASK_UNDELIVERED)
33 return AC_ERR_ATA_BUS;
35 /* ts->resp == SAS_TASK_COMPLETE */
36 /* task delivered, what happened afterwards? */
38 case SAS_DEV_NO_RESPONSE:
39 return AC_ERR_TIMEOUT;
43 return AC_ERR_ATA_BUS;
44 case SAS_DATA_UNDERRUN:
46 * Some programs that use the taskfile interface
47 * (smartctl in particular) can cause underrun
48 * problems. Ignore these errors, perhaps at our
52 case SAS_DATA_OVERRUN:
54 case SAS_DEVICE_UNKNOWN:
57 pr_warn("%s: Saw error %d. What to do?\n",
60 case SAM_STAT_CHECK_CONDITION:
61 case SAS_ABORTED_TASK:
63 case SAS_PROTO_RESPONSE:
64 /* This means the ending_fis has the error
65 * value; return 0 here to collect it
73 static void sas_ata_task_done(struct sas_task *task)
75 struct ata_queued_cmd *qc = task->uldd_task;
76 struct domain_device *dev = task->dev;
77 struct task_status_struct *stat = &task->task_status;
78 struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
79 struct sas_ha_struct *sas_ha = dev->port->ha;
80 enum ata_completion_errors ac;
82 struct ata_link *link;
85 spin_lock_irqsave(&dev->done_lock, flags);
86 if (test_bit(SAS_HA_FROZEN, &sas_ha->state))
88 else if (qc && qc->scsicmd)
89 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
90 spin_unlock_irqrestore(&dev->done_lock, flags);
92 /* check if libsas-eh got to the task before us */
102 spin_lock_irqsave(ap->lock, flags);
103 /* check if we lost the race with libata/sas_ata_post_internal() */
104 if (unlikely(ata_port_is_frozen(ap))) {
105 spin_unlock_irqrestore(ap->lock, flags);
107 goto qc_already_gone;
109 /* if eh is not involved and the port is frozen then the
110 * ata internal abort process has taken responsibility
117 if (stat->stat == SAS_PROTO_RESPONSE ||
118 stat->stat == SAS_SAM_STAT_GOOD ||
119 (stat->stat == SAS_SAM_STAT_CHECK_CONDITION &&
120 dev->sata_dev.class == ATA_DEV_ATAPI)) {
121 memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE);
123 if (!link->sactive) {
124 qc->err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
126 link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
127 if (unlikely(link->eh_info.err_mask))
128 qc->flags |= ATA_QCFLAG_EH;
131 ac = sas_to_ata_err(stat);
133 pr_warn("%s: SAS error 0x%x\n", __func__, stat->stat);
134 /* We saw a SAS error. Send a vague error. */
135 if (!link->sactive) {
138 link->eh_info.err_mask |= AC_ERR_DEV;
139 qc->flags |= ATA_QCFLAG_EH;
142 dev->sata_dev.fis[2] = ATA_ERR | ATA_DRDY; /* tf status */
143 dev->sata_dev.fis[3] = ATA_ABORTED; /* tf error */
147 qc->lldd_task = NULL;
149 spin_unlock_irqrestore(ap->lock, flags);
155 static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
156 __must_hold(ap->lock)
158 struct sas_task *task;
159 struct scatterlist *sg;
160 int ret = AC_ERR_SYSTEM;
161 unsigned int si, xfer = 0;
162 struct ata_port *ap = qc->ap;
163 struct domain_device *dev = ap->private_data;
164 struct sas_ha_struct *sas_ha = dev->port->ha;
165 struct Scsi_Host *host = sas_ha->core.shost;
166 struct sas_internal *i = to_sas_internal(host->transportt);
168 /* TODO: we should try to remove that unlock */
169 spin_unlock(ap->lock);
171 /* If the device fell off, no sense in issuing commands */
172 if (test_bit(SAS_DEV_GONE, &dev->state))
175 task = sas_alloc_task(GFP_ATOMIC);
179 task->task_proto = SAS_PROTOCOL_STP;
180 task->task_done = sas_ata_task_done;
182 /* For NCQ commands, zero out the tag libata assigned us */
183 if (ata_is_ncq(qc->tf.protocol))
186 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *)&task->ata_task.fis);
187 task->uldd_task = qc;
188 if (ata_is_atapi(qc->tf.protocol)) {
189 memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
190 task->total_xfer_len = qc->nbytes;
191 task->num_scatter = qc->n_elem;
192 task->data_dir = qc->dma_dir;
193 } else if (!ata_is_data(qc->tf.protocol)) {
194 task->data_dir = DMA_NONE;
196 for_each_sg(qc->sg, sg, qc->n_elem, si)
197 xfer += sg_dma_len(sg);
199 task->total_xfer_len = xfer;
200 task->num_scatter = si;
201 task->data_dir = qc->dma_dir;
203 task->scatter = qc->sg;
204 task->ata_task.retry_count = 1;
205 qc->lldd_task = task;
207 task->ata_task.use_ncq = ata_is_ncq(qc->tf.protocol);
208 task->ata_task.dma_xfer = ata_is_dma(qc->tf.protocol);
211 ASSIGN_SAS_TASK(qc->scsicmd, task);
213 ret = i->dft->lldd_execute_task(task, GFP_ATOMIC);
215 pr_debug("lldd_execute_task returned: %d\n", ret);
218 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
220 qc->lldd_task = NULL;
229 static void sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc)
231 struct domain_device *dev = qc->ap->private_data;
233 ata_tf_from_fis(dev->sata_dev.fis, &qc->result_tf);
236 static struct sas_internal *dev_to_sas_internal(struct domain_device *dev)
238 return to_sas_internal(dev->port->ha->core.shost->transportt);
241 static int sas_get_ata_command_set(struct domain_device *dev);
243 int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
245 if (phy->attached_tproto & SAS_PROTOCOL_STP)
246 dev->tproto = phy->attached_tproto;
247 if (phy->attached_sata_dev)
248 dev->tproto |= SAS_SATA_DEV;
250 if (phy->attached_dev_type == SAS_SATA_PENDING)
251 dev->dev_type = SAS_SATA_PENDING;
255 dev->dev_type = SAS_SATA_DEV;
256 res = sas_get_report_phy_sata(dev->parent, phy->phy_id,
257 &dev->sata_dev.rps_resp);
259 pr_debug("report phy sata to %016llx:%02d returned 0x%x\n",
260 SAS_ADDR(dev->parent->sas_addr),
264 memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis,
265 sizeof(struct dev_to_host_fis));
266 dev->sata_dev.class = sas_get_ata_command_set(dev);
271 static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy)
275 /* we weren't pending, so successfully end the reset sequence now */
276 if (dev->dev_type != SAS_SATA_PENDING)
279 /* hmmm, if this succeeds do we need to repost the domain_device to the
280 * lldd so it can pick up new parameters?
282 res = sas_get_ata_info(dev, phy);
284 return 0; /* retry */
289 int smp_ata_check_ready_type(struct ata_link *link)
291 struct domain_device *dev = link->ap->private_data;
292 struct sas_phy *phy = sas_get_local_phy(dev);
293 struct domain_device *ex_dev = dev->parent;
294 enum sas_device_type type = SAS_PHY_UNUSED;
295 u8 sas_addr[SAS_ADDR_SIZE];
298 res = sas_get_phy_attached_dev(ex_dev, phy->number, sas_addr, &type);
299 sas_put_local_phy(phy);
304 case SAS_SATA_PENDING:
312 EXPORT_SYMBOL_GPL(smp_ata_check_ready_type);
314 static int smp_ata_check_ready(struct ata_link *link)
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];
323 res = sas_ex_phy_discover(ex_dev, phy->number);
324 sas_put_local_phy(phy);
326 /* break the wait early if the expander is unreachable,
327 * otherwise keep polling
331 if (res != SMP_RESP_FUNC_ACC)
334 switch (ex_phy->attached_dev_type) {
335 case SAS_SATA_PENDING:
338 if (ex_phy->attached_sata_dev)
339 return sas_ata_clear_pending(dev, ex_phy);
346 static int local_ata_check_ready(struct ata_link *link)
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);
352 if (i->dft->lldd_ata_check_ready)
353 return i->dft->lldd_ata_check_ready(dev);
355 /* lldd's that don't implement 'ready' checking get the
356 * old default behavior of not coordinating reset
357 * recovery with libata
363 static int sas_ata_printk(const char *level, const struct domain_device *ddev,
364 const char *fmt, ...)
366 struct ata_port *ap = ddev->sata_dev.ap;
367 struct device *dev = &ddev->rphy->dev;
368 struct va_format vaf;
377 r = printk("%s" SAS_FMT "ata%u: %s: %pV",
378 level, ap->print_id, dev_name(dev), &vaf);
385 static int sas_ata_wait_after_reset(struct domain_device *dev, unsigned long deadline)
387 struct sata_device *sata_dev = &dev->sata_dev;
388 int (*check_ready)(struct ata_link *link);
389 struct ata_port *ap = sata_dev->ap;
390 struct ata_link *link = &ap->link;
394 phy = sas_get_local_phy(dev);
395 if (scsi_is_sas_phy_local(phy))
396 check_ready = local_ata_check_ready;
398 check_ready = smp_ata_check_ready;
399 sas_put_local_phy(phy);
401 ret = ata_wait_after_reset(link, deadline, check_ready);
402 if (ret && ret != -EAGAIN)
403 sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret);
408 static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
409 unsigned long deadline)
411 struct ata_port *ap = link->ap;
412 struct domain_device *dev = ap->private_data;
413 struct sas_internal *i = dev_to_sas_internal(dev);
416 ret = i->dft->lldd_I_T_nexus_reset(dev);
420 if (ret != TMF_RESP_FUNC_COMPLETE)
421 sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n");
423 ret = sas_ata_wait_after_reset(dev, deadline);
425 *class = dev->sata_dev.class;
427 ap->cbl = ATA_CBL_SATA;
432 * notify the lldd to forget the sas_task for this internal ata command
433 * that bypasses scsi-eh
435 static void sas_ata_internal_abort(struct sas_task *task)
437 struct sas_internal *si = dev_to_sas_internal(task->dev);
441 spin_lock_irqsave(&task->task_state_lock, flags);
442 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
443 task->task_state_flags & SAS_TASK_STATE_DONE) {
444 spin_unlock_irqrestore(&task->task_state_lock, flags);
445 pr_debug("%s: Task %p already finished.\n", __func__, task);
448 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
449 spin_unlock_irqrestore(&task->task_state_lock, flags);
451 res = si->dft->lldd_abort_task(task);
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);
460 /* XXX we are not prepared to deal with ->lldd_abort_task()
461 * failures. TODO: lldds need to unconditionally forget about
462 * aborted ata tasks, otherwise we (likely) leak the sas task
465 pr_warn("%s: Task %p leaked.\n", __func__, task);
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);
476 static void sas_ata_post_internal(struct ata_queued_cmd *qc)
478 if (qc->flags & ATA_QCFLAG_EH)
479 qc->err_mask |= AC_ERR_OTHER;
483 * Find the sas_task and kill it. By this point, libata
484 * has decided to kill the qc and has frozen the port.
485 * In this state sas_ata_task_done() will no longer free
486 * the sas_task, so we need to notify the lldd (via
487 * ->lldd_abort_task) that the task is dead and free it
490 struct sas_task *task = qc->lldd_task;
492 qc->lldd_task = NULL;
495 task->uldd_task = NULL;
496 sas_ata_internal_abort(task);
501 static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
503 struct domain_device *dev = ap->private_data;
504 struct sas_internal *i = dev_to_sas_internal(dev);
506 if (i->dft->lldd_ata_set_dmamode)
507 i->dft->lldd_ata_set_dmamode(dev);
510 static void sas_ata_sched_eh(struct ata_port *ap)
512 struct domain_device *dev = ap->private_data;
513 struct sas_ha_struct *ha = dev->port->ha;
516 spin_lock_irqsave(&ha->lock, flags);
517 if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state))
519 ata_std_sched_eh(ap);
520 spin_unlock_irqrestore(&ha->lock, flags);
523 void sas_ata_end_eh(struct ata_port *ap)
525 struct domain_device *dev = ap->private_data;
526 struct sas_ha_struct *ha = dev->port->ha;
529 spin_lock_irqsave(&ha->lock, flags);
530 if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state))
532 spin_unlock_irqrestore(&ha->lock, flags);
535 static int sas_ata_prereset(struct ata_link *link, unsigned long deadline)
537 struct ata_port *ap = link->ap;
538 struct domain_device *dev = ap->private_data;
539 struct sas_phy *local_phy = sas_get_local_phy(dev);
542 if (!local_phy->enabled || test_bit(SAS_DEV_GONE, &dev->state))
544 sas_put_local_phy(local_phy);
549 static struct ata_port_operations sas_sata_ops = {
550 .prereset = sas_ata_prereset,
551 .hardreset = sas_ata_hard_reset,
552 .error_handler = ata_std_error_handler,
553 .post_internal_cmd = sas_ata_post_internal,
554 .qc_defer = ata_std_qc_defer,
555 .qc_prep = ata_noop_qc_prep,
556 .qc_issue = sas_ata_qc_issue,
557 .qc_fill_rtf = sas_ata_qc_fill_rtf,
558 .port_start = ata_sas_port_start,
559 .port_stop = ata_sas_port_stop,
560 .set_dmamode = sas_ata_set_dmamode,
561 .sched_eh = sas_ata_sched_eh,
562 .end_eh = sas_ata_end_eh,
565 static struct ata_port_info sata_port_info = {
566 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ |
567 ATA_FLAG_SAS_HOST | ATA_FLAG_FPDMA_AUX,
568 .pio_mask = ATA_PIO4,
569 .mwdma_mask = ATA_MWDMA2,
570 .udma_mask = ATA_UDMA6,
571 .port_ops = &sas_sata_ops
574 int sas_ata_init(struct domain_device *found_dev)
576 struct sas_ha_struct *ha = found_dev->port->ha;
577 struct Scsi_Host *shost = ha->core.shost;
578 struct ata_host *ata_host;
582 ata_host = kzalloc(sizeof(*ata_host), GFP_KERNEL);
584 pr_err("ata host alloc failed.\n");
588 ata_host_init(ata_host, ha->dev, &sas_sata_ops);
590 ap = ata_sas_port_alloc(ata_host, &sata_port_info, shost);
592 pr_err("ata_sas_port_alloc failed.\n");
597 ap->private_data = found_dev;
598 ap->cbl = ATA_CBL_SATA;
599 ap->scsi_host = shost;
600 rc = ata_sas_port_init(ap);
604 rc = ata_sas_tport_add(ata_host->dev, ap);
608 found_dev->sata_dev.ata_host = ata_host;
609 found_dev->sata_dev.ap = ap;
614 ata_sas_port_destroy(ap);
616 ata_host_put(ata_host);
620 void sas_ata_task_abort(struct sas_task *task)
622 struct ata_queued_cmd *qc = task->uldd_task;
623 struct completion *waiting;
625 /* Bounce SCSI-initiated commands to the SCSI EH */
627 blk_abort_request(scsi_cmd_to_rq(qc->scsicmd));
631 /* Internal command, fake a timeout and complete. */
632 qc->flags &= ~ATA_QCFLAG_ACTIVE;
633 qc->flags |= ATA_QCFLAG_EH;
634 qc->err_mask |= AC_ERR_TIMEOUT;
635 waiting = qc->private_data;
639 static int sas_get_ata_command_set(struct domain_device *dev)
641 struct dev_to_host_fis *fis =
642 (struct dev_to_host_fis *) dev->frame_rcvd;
643 struct ata_taskfile tf;
645 if (dev->dev_type == SAS_SATA_PENDING)
646 return ATA_DEV_UNKNOWN;
648 ata_tf_from_fis((const u8 *)fis, &tf);
650 return ata_dev_classify(&tf);
653 void sas_probe_sata(struct asd_sas_port *port)
655 struct domain_device *dev, *n;
657 mutex_lock(&port->ha->disco_mutex);
658 list_for_each_entry(dev, &port->disco_list, disco_list_node) {
659 if (!dev_is_sata(dev))
662 ata_sas_async_probe(dev->sata_dev.ap);
664 mutex_unlock(&port->ha->disco_mutex);
666 list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
667 if (!dev_is_sata(dev))
670 sas_ata_wait_eh(dev);
672 /* if libata could not bring the link up, don't surface
675 if (!ata_dev_enabled(sas_to_ata_dev(dev)))
676 sas_fail_probe(dev, __func__, -ENODEV);
681 static void sas_ata_flush_pm_eh(struct asd_sas_port *port, const char *func)
683 struct domain_device *dev, *n;
685 list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) {
686 if (!dev_is_sata(dev))
689 sas_ata_wait_eh(dev);
691 /* if libata failed to power manage the device, tear it down */
692 if (ata_dev_disabled(sas_to_ata_dev(dev)))
693 sas_fail_probe(dev, func, -ENODEV);
697 void sas_suspend_sata(struct asd_sas_port *port)
699 struct domain_device *dev;
701 mutex_lock(&port->ha->disco_mutex);
702 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
703 struct sata_device *sata;
705 if (!dev_is_sata(dev))
708 sata = &dev->sata_dev;
709 if (sata->ap->pm_mesg.event == PM_EVENT_SUSPEND)
712 ata_sas_port_suspend(sata->ap);
714 mutex_unlock(&port->ha->disco_mutex);
716 sas_ata_flush_pm_eh(port, __func__);
719 void sas_resume_sata(struct asd_sas_port *port)
721 struct domain_device *dev;
723 mutex_lock(&port->ha->disco_mutex);
724 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
725 struct sata_device *sata;
727 if (!dev_is_sata(dev))
730 sata = &dev->sata_dev;
731 if (sata->ap->pm_mesg.event == PM_EVENT_ON)
734 ata_sas_port_resume(sata->ap);
736 mutex_unlock(&port->ha->disco_mutex);
738 sas_ata_flush_pm_eh(port, __func__);
742 * sas_discover_sata - discover an STP/SATA domain device
743 * @dev: pointer to struct domain_device of interest
745 * Devices directly attached to a HA port, have no parents. All other
746 * devices do, and should have their "parent" pointer set appropriately
747 * before calling this function.
749 int sas_discover_sata(struct domain_device *dev)
751 if (dev->dev_type == SAS_SATA_PM)
754 dev->sata_dev.class = sas_get_ata_command_set(dev);
755 sas_fill_in_rphy(dev, dev->rphy);
757 return sas_notify_lldd_dev_found(dev);
760 static void async_sas_ata_eh(void *data, async_cookie_t cookie)
762 struct domain_device *dev = data;
763 struct ata_port *ap = dev->sata_dev.ap;
764 struct sas_ha_struct *ha = dev->port->ha;
766 sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n");
767 ata_scsi_port_error_handler(ha->core.shost, ap);
771 void sas_ata_strategy_handler(struct Scsi_Host *shost)
773 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
774 ASYNC_DOMAIN_EXCLUSIVE(async);
777 /* it's ok to defer revalidation events during ata eh, these
778 * disks are in one of three states:
779 * 1/ present for initial domain discovery, and these
780 * resets will cause bcn flutters
781 * 2/ hot removed, we'll discover that after eh fails
782 * 3/ hot added after initial discovery, lost the race, and need
783 * to catch the next train.
785 sas_disable_revalidation(sas_ha);
787 spin_lock_irq(&sas_ha->phy_port_lock);
788 for (i = 0; i < sas_ha->num_phys; i++) {
789 struct asd_sas_port *port = sas_ha->sas_port[i];
790 struct domain_device *dev;
792 spin_lock(&port->dev_list_lock);
793 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
794 if (!dev_is_sata(dev))
797 /* hold a reference over eh since we may be
798 * racing with final remove once all commands
801 kref_get(&dev->kref);
803 async_schedule_domain(async_sas_ata_eh, dev, &async);
805 spin_unlock(&port->dev_list_lock);
807 spin_unlock_irq(&sas_ha->phy_port_lock);
809 async_synchronize_full_domain(&async);
811 sas_enable_revalidation(sas_ha);
814 void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q)
816 struct scsi_cmnd *cmd, *n;
817 struct domain_device *eh_dev;
823 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
824 struct domain_device *ddev = cmd_to_domain_dev(cmd);
826 if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd))
828 if (eh_dev && eh_dev != ddev)
831 list_move(&cmd->eh_entry, &sata_q);
834 if (!list_empty(&sata_q)) {
835 struct ata_port *ap = eh_dev->sata_dev.ap;
837 sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n");
838 ata_scsi_cmd_error_handler(shost, ap, &sata_q);
840 * ata's error handler may leave the cmd on the list
841 * so make sure they don't remain on a stack list
842 * about to go out of scope.
844 * This looks strange, since the commands are
845 * now part of no list, but the next error
846 * action will be ata_port_error_handler()
847 * which takes no list and sweeps them up
848 * anyway from the ata tag array.
850 while (!list_empty(&sata_q))
851 list_del_init(sata_q.next);
856 void sas_ata_schedule_reset(struct domain_device *dev)
858 struct ata_eh_info *ehi;
862 if (!dev_is_sata(dev))
865 ap = dev->sata_dev.ap;
866 ehi = &ap->link.eh_info;
868 spin_lock_irqsave(ap->lock, flags);
869 ehi->err_mask |= AC_ERR_TIMEOUT;
870 ehi->action |= ATA_EH_RESET;
871 ata_port_schedule_eh(ap);
872 spin_unlock_irqrestore(ap->lock, flags);
874 EXPORT_SYMBOL_GPL(sas_ata_schedule_reset);
876 void sas_ata_wait_eh(struct domain_device *dev)
880 if (!dev_is_sata(dev))
883 ap = dev->sata_dev.ap;
884 ata_port_wait_eh(ap);
887 void sas_ata_device_link_abort(struct domain_device *device, bool force_reset)
889 struct ata_port *ap = device->sata_dev.ap;
890 struct ata_link *link = &ap->link;
893 spin_lock_irqsave(ap->lock, flags);
894 device->sata_dev.fis[2] = ATA_ERR | ATA_DRDY; /* tf status */
895 device->sata_dev.fis[3] = ATA_ABORTED; /* tf error */
897 link->eh_info.err_mask |= AC_ERR_DEV;
899 link->eh_info.action |= ATA_EH_RESET;
900 ata_link_abort(link);
901 spin_unlock_irqrestore(ap->lock, flags);
903 EXPORT_SYMBOL_GPL(sas_ata_device_link_abort);
905 int sas_execute_ata_cmd(struct domain_device *device, u8 *fis, int force_phy_id)
907 struct sas_tmf_task tmf_task = {};
908 return sas_execute_tmf(device, fis, sizeof(struct host_to_dev_fis),
909 force_phy_id, &tmf_task);
911 EXPORT_SYMBOL_GPL(sas_execute_ata_cmd);