2 * Support for SATA devices on Serial Attached SCSI (SAS) controllers
4 * Copyright (C) 2006 IBM Corporation
6 * Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
24 #include <linux/scatterlist.h>
25 #include <linux/slab.h>
26 #include <linux/async.h>
27 #include <linux/export.h>
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>
41 static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
43 /* Cheesy attempt to translate SAS errors into ATA. Hah! */
46 if (ts->resp == SAS_TASK_UNDELIVERED)
47 return AC_ERR_ATA_BUS;
49 /* ts->resp == SAS_TASK_COMPLETE */
50 /* task delivered, what happened afterwards? */
52 case SAS_DEV_NO_RESPONSE:
53 return AC_ERR_TIMEOUT;
58 return AC_ERR_ATA_BUS;
61 case SAS_DATA_UNDERRUN:
63 * Some programs that use the taskfile interface
64 * (smartctl in particular) can cause underrun
65 * problems. Ignore these errors, perhaps at our
70 case SAS_DATA_OVERRUN:
72 case SAS_DEVICE_UNKNOWN:
74 return AC_ERR_INVALID;
78 SAS_DPRINTK("%s: Saw error %d. What to do?\n",
82 case SAM_STAT_CHECK_CONDITION:
83 case SAS_ABORTED_TASK:
86 case SAS_PROTO_RESPONSE:
87 /* This means the ending_fis has the error
88 * value; return 0 here to collect it */
95 static void sas_ata_task_done(struct sas_task *task)
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;
104 struct ata_link *link;
107 spin_lock_irqsave(&dev->done_lock, flags);
108 if (test_bit(SAS_HA_FROZEN, &sas_ha->state))
110 else if (qc && qc->scsicmd)
111 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
112 spin_unlock_irqrestore(&dev->done_lock, flags);
114 /* check if libsas-eh got to the task before us */
119 goto qc_already_gone;
124 spin_lock_irqsave(ap->lock, flags);
125 /* check if we lost the race with libata/sas_ata_post_internal() */
126 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) {
127 spin_unlock_irqrestore(ap->lock, flags);
129 goto qc_already_gone;
131 /* if eh is not involved and the port is frozen then the
132 * ata internal abort process has taken responsibility
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);
144 if (!link->sactive) {
145 qc->err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
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;
152 ac = sas_to_ata_err(stat);
154 SAS_DPRINTK("%s: SAS error %x\n", __func__,
156 /* We saw a SAS error. Send a vague error. */
157 if (!link->sactive) {
160 link->eh_info.err_mask |= AC_ERR_DEV;
161 qc->flags |= ATA_QCFLAG_FAILED;
164 dev->sata_dev.fis[3] = 0x04; /* status err */
165 dev->sata_dev.fis[2] = ATA_ERR;
169 qc->lldd_task = NULL;
171 spin_unlock_irqrestore(ap->lock, flags);
177 static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
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);
190 /* TODO: audit callers to ensure they are ready for qc_issue to
191 * unconditionally re-enable interrupts
193 local_irq_save(flags);
194 spin_unlock(ap->lock);
196 /* If the device fell off, no sense in issuing commands */
197 if (test_bit(SAS_DEV_GONE, &dev->state))
200 task = sas_alloc_task(GFP_ATOMIC);
204 task->task_proto = SAS_PROTOCOL_STP;
205 task->task_done = sas_ata_task_done;
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 /* Need to zero out the tag libata assigned us */
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;
223 for_each_sg(qc->sg, sg, qc->n_elem, si)
226 task->total_xfer_len = xfer;
227 task->num_scatter = si;
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;
236 task->ata_task.use_ncq = ata_is_ncq(qc->tf.protocol);
237 task->ata_task.dma_xfer = ata_is_dma(qc->tf.protocol);
240 ASSIGN_SAS_TASK(qc->scsicmd, task);
242 ret = i->dft->lldd_execute_task(task, GFP_ATOMIC);
244 SAS_DPRINTK("lldd_execute_task returned: %d\n", ret);
247 ASSIGN_SAS_TASK(qc->scsicmd, NULL);
254 local_irq_restore(flags);
258 static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc)
260 struct domain_device *dev = qc->ap->private_data;
262 ata_tf_from_fis(dev->sata_dev.fis, &qc->result_tf);
266 static struct sas_internal *dev_to_sas_internal(struct domain_device *dev)
268 return to_sas_internal(dev->port->ha->core.shost->transportt);
271 static int sas_get_ata_command_set(struct domain_device *dev);
273 int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
275 if (phy->attached_tproto & SAS_PROTOCOL_STP)
276 dev->tproto = phy->attached_tproto;
277 if (phy->attached_sata_dev)
278 dev->tproto |= SAS_SATA_DEV;
280 if (phy->attached_dev_type == SAS_SATA_PENDING)
281 dev->dev_type = SAS_SATA_PENDING;
285 dev->dev_type = SAS_SATA_DEV;
286 res = sas_get_report_phy_sata(dev->parent, phy->phy_id,
287 &dev->sata_dev.rps_resp);
289 SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
290 "0x%x\n", SAS_ADDR(dev->parent->sas_addr),
294 memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis,
295 sizeof(struct dev_to_host_fis));
296 dev->sata_dev.class = sas_get_ata_command_set(dev);
301 static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy)
305 /* we weren't pending, so successfully end the reset sequence now */
306 if (dev->dev_type != SAS_SATA_PENDING)
309 /* hmmm, if this succeeds do we need to repost the domain_device to the
310 * lldd so it can pick up new parameters?
312 res = sas_get_ata_info(dev, phy);
314 return 0; /* retry */
319 static int smp_ata_check_ready(struct ata_link *link)
322 struct ata_port *ap = link->ap;
323 struct domain_device *dev = ap->private_data;
324 struct domain_device *ex_dev = dev->parent;
325 struct sas_phy *phy = sas_get_local_phy(dev);
326 struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number];
328 res = sas_ex_phy_discover(ex_dev, phy->number);
329 sas_put_local_phy(phy);
331 /* break the wait early if the expander is unreachable,
332 * otherwise keep polling
336 if (res != SMP_RESP_FUNC_ACC)
339 switch (ex_phy->attached_dev_type) {
340 case SAS_SATA_PENDING:
343 if (ex_phy->attached_sata_dev)
344 return sas_ata_clear_pending(dev, ex_phy);
350 static int local_ata_check_ready(struct ata_link *link)
352 struct ata_port *ap = link->ap;
353 struct domain_device *dev = ap->private_data;
354 struct sas_internal *i = dev_to_sas_internal(dev);
356 if (i->dft->lldd_ata_check_ready)
357 return i->dft->lldd_ata_check_ready(dev);
359 /* lldd's that don't implement 'ready' checking get the
360 * old default behavior of not coordinating reset
361 * recovery with libata
367 static int sas_ata_printk(const char *level, const struct domain_device *ddev,
368 const char *fmt, ...)
370 struct ata_port *ap = ddev->sata_dev.ap;
371 struct device *dev = &ddev->rphy->dev;
372 struct va_format vaf;
381 r = printk("%ssas: ata%u: %s: %pV",
382 level, ap->print_id, dev_name(dev), &vaf);
389 static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
390 unsigned long deadline)
394 struct ata_port *ap = link->ap;
395 int (*check_ready)(struct ata_link *link);
396 struct domain_device *dev = ap->private_data;
397 struct sas_internal *i = dev_to_sas_internal(dev);
399 res = i->dft->lldd_I_T_nexus_reset(dev);
403 if (res != TMF_RESP_FUNC_COMPLETE)
404 sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n");
406 phy = sas_get_local_phy(dev);
407 if (scsi_is_sas_phy_local(phy))
408 check_ready = local_ata_check_ready;
410 check_ready = smp_ata_check_ready;
411 sas_put_local_phy(phy);
413 ret = ata_wait_after_reset(link, deadline, check_ready);
414 if (ret && ret != -EAGAIN)
415 sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret);
417 *class = dev->sata_dev.class;
419 ap->cbl = ATA_CBL_SATA;
424 * notify the lldd to forget the sas_task for this internal ata command
425 * that bypasses scsi-eh
427 static void sas_ata_internal_abort(struct sas_task *task)
429 struct sas_internal *si = dev_to_sas_internal(task->dev);
433 spin_lock_irqsave(&task->task_state_lock, flags);
434 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
435 task->task_state_flags & SAS_TASK_STATE_DONE) {
436 spin_unlock_irqrestore(&task->task_state_lock, flags);
437 SAS_DPRINTK("%s: Task %p already finished.\n", __func__,
441 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
442 spin_unlock_irqrestore(&task->task_state_lock, flags);
444 res = si->dft->lldd_abort_task(task);
446 spin_lock_irqsave(&task->task_state_lock, flags);
447 if (task->task_state_flags & SAS_TASK_STATE_DONE ||
448 res == TMF_RESP_FUNC_COMPLETE) {
449 spin_unlock_irqrestore(&task->task_state_lock, flags);
453 /* XXX we are not prepared to deal with ->lldd_abort_task()
454 * failures. TODO: lldds need to unconditionally forget about
455 * aborted ata tasks, otherwise we (likely) leak the sas task
458 SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task);
460 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
461 task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
462 spin_unlock_irqrestore(&task->task_state_lock, flags);
469 static void sas_ata_post_internal(struct ata_queued_cmd *qc)
471 if (qc->flags & ATA_QCFLAG_FAILED)
472 qc->err_mask |= AC_ERR_OTHER;
476 * Find the sas_task and kill it. By this point, libata
477 * has decided to kill the qc and has frozen the port.
478 * In this state sas_ata_task_done() will no longer free
479 * the sas_task, so we need to notify the lldd (via
480 * ->lldd_abort_task) that the task is dead and free it
483 struct sas_task *task = qc->lldd_task;
485 qc->lldd_task = NULL;
488 task->uldd_task = NULL;
489 sas_ata_internal_abort(task);
494 static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
496 struct domain_device *dev = ap->private_data;
497 struct sas_internal *i = dev_to_sas_internal(dev);
499 if (i->dft->lldd_ata_set_dmamode)
500 i->dft->lldd_ata_set_dmamode(dev);
503 static void sas_ata_sched_eh(struct ata_port *ap)
505 struct domain_device *dev = ap->private_data;
506 struct sas_ha_struct *ha = dev->port->ha;
509 spin_lock_irqsave(&ha->lock, flags);
510 if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state))
512 ata_std_sched_eh(ap);
513 spin_unlock_irqrestore(&ha->lock, flags);
516 void sas_ata_end_eh(struct ata_port *ap)
518 struct domain_device *dev = ap->private_data;
519 struct sas_ha_struct *ha = dev->port->ha;
522 spin_lock_irqsave(&ha->lock, flags);
523 if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state))
525 spin_unlock_irqrestore(&ha->lock, flags);
528 static struct ata_port_operations sas_sata_ops = {
529 .prereset = ata_std_prereset,
530 .hardreset = sas_ata_hard_reset,
531 .postreset = ata_std_postreset,
532 .error_handler = ata_std_error_handler,
533 .post_internal_cmd = sas_ata_post_internal,
534 .qc_defer = ata_std_qc_defer,
535 .qc_prep = ata_noop_qc_prep,
536 .qc_issue = sas_ata_qc_issue,
537 .qc_fill_rtf = sas_ata_qc_fill_rtf,
538 .port_start = ata_sas_port_start,
539 .port_stop = ata_sas_port_stop,
540 .set_dmamode = sas_ata_set_dmamode,
541 .sched_eh = sas_ata_sched_eh,
542 .end_eh = sas_ata_end_eh,
545 static struct ata_port_info sata_port_info = {
546 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ |
547 ATA_FLAG_SAS_HOST | ATA_FLAG_FPDMA_AUX,
548 .pio_mask = ATA_PIO4,
549 .mwdma_mask = ATA_MWDMA2,
550 .udma_mask = ATA_UDMA6,
551 .port_ops = &sas_sata_ops
554 int sas_ata_init(struct domain_device *found_dev)
556 struct sas_ha_struct *ha = found_dev->port->ha;
557 struct Scsi_Host *shost = ha->core.shost;
561 ata_host_init(&found_dev->sata_dev.ata_host, ha->dev, &sas_sata_ops);
562 ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
566 SAS_DPRINTK("ata_sas_port_alloc failed.\n");
570 ap->private_data = found_dev;
571 ap->cbl = ATA_CBL_SATA;
572 ap->scsi_host = shost;
573 rc = ata_sas_port_init(ap);
575 ata_sas_port_destroy(ap);
578 found_dev->sata_dev.ap = ap;
583 void sas_ata_task_abort(struct sas_task *task)
585 struct ata_queued_cmd *qc = task->uldd_task;
586 struct completion *waiting;
588 /* Bounce SCSI-initiated commands to the SCSI EH */
590 struct request_queue *q = qc->scsicmd->device->request_queue;
593 spin_lock_irqsave(q->queue_lock, flags);
594 blk_abort_request(qc->scsicmd->request);
595 spin_unlock_irqrestore(q->queue_lock, flags);
599 /* Internal command, fake a timeout and complete. */
600 qc->flags &= ~ATA_QCFLAG_ACTIVE;
601 qc->flags |= ATA_QCFLAG_FAILED;
602 qc->err_mask |= AC_ERR_TIMEOUT;
603 waiting = qc->private_data;
607 static int sas_get_ata_command_set(struct domain_device *dev)
609 struct dev_to_host_fis *fis =
610 (struct dev_to_host_fis *) dev->frame_rcvd;
611 struct ata_taskfile tf;
613 if (dev->dev_type == SAS_SATA_PENDING)
614 return ATA_DEV_UNKNOWN;
616 ata_tf_from_fis((const u8 *)fis, &tf);
618 return ata_dev_classify(&tf);
621 void sas_probe_sata(struct asd_sas_port *port)
623 struct domain_device *dev, *n;
625 mutex_lock(&port->ha->disco_mutex);
626 list_for_each_entry(dev, &port->disco_list, disco_list_node) {
627 if (!dev_is_sata(dev))
630 ata_sas_async_probe(dev->sata_dev.ap);
632 mutex_unlock(&port->ha->disco_mutex);
634 list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) {
635 if (!dev_is_sata(dev))
638 sas_ata_wait_eh(dev);
640 /* if libata could not bring the link up, don't surface
643 if (ata_dev_disabled(sas_to_ata_dev(dev)))
644 sas_fail_probe(dev, __func__, -ENODEV);
649 static void sas_ata_flush_pm_eh(struct asd_sas_port *port, const char *func)
651 struct domain_device *dev, *n;
653 list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) {
654 if (!dev_is_sata(dev))
657 sas_ata_wait_eh(dev);
659 /* if libata failed to power manage the device, tear it down */
660 if (ata_dev_disabled(sas_to_ata_dev(dev)))
661 sas_fail_probe(dev, func, -ENODEV);
665 void sas_suspend_sata(struct asd_sas_port *port)
667 struct domain_device *dev;
669 mutex_lock(&port->ha->disco_mutex);
670 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
671 struct sata_device *sata;
673 if (!dev_is_sata(dev))
676 sata = &dev->sata_dev;
677 if (sata->ap->pm_mesg.event == PM_EVENT_SUSPEND)
680 ata_sas_port_suspend(sata->ap);
682 mutex_unlock(&port->ha->disco_mutex);
684 sas_ata_flush_pm_eh(port, __func__);
687 void sas_resume_sata(struct asd_sas_port *port)
689 struct domain_device *dev;
691 mutex_lock(&port->ha->disco_mutex);
692 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
693 struct sata_device *sata;
695 if (!dev_is_sata(dev))
698 sata = &dev->sata_dev;
699 if (sata->ap->pm_mesg.event == PM_EVENT_ON)
702 ata_sas_port_resume(sata->ap);
704 mutex_unlock(&port->ha->disco_mutex);
706 sas_ata_flush_pm_eh(port, __func__);
710 * sas_discover_sata -- discover an STP/SATA domain device
711 * @dev: pointer to struct domain_device of interest
713 * Devices directly attached to a HA port, have no parents. All other
714 * devices do, and should have their "parent" pointer set appropriately
715 * before calling this function.
717 int sas_discover_sata(struct domain_device *dev)
721 if (dev->dev_type == SAS_SATA_PM)
724 dev->sata_dev.class = sas_get_ata_command_set(dev);
725 sas_fill_in_rphy(dev, dev->rphy);
727 res = sas_notify_lldd_dev_found(dev);
731 sas_discover_event(dev->port, DISCE_PROBE);
735 static void async_sas_ata_eh(void *data, async_cookie_t cookie)
737 struct domain_device *dev = data;
738 struct ata_port *ap = dev->sata_dev.ap;
739 struct sas_ha_struct *ha = dev->port->ha;
741 sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n");
742 ata_scsi_port_error_handler(ha->core.shost, ap);
746 void sas_ata_strategy_handler(struct Scsi_Host *shost)
748 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
749 ASYNC_DOMAIN_EXCLUSIVE(async);
752 /* it's ok to defer revalidation events during ata eh, these
753 * disks are in one of three states:
754 * 1/ present for initial domain discovery, and these
755 * resets will cause bcn flutters
756 * 2/ hot removed, we'll discover that after eh fails
757 * 3/ hot added after initial discovery, lost the race, and need
758 * to catch the next train.
760 sas_disable_revalidation(sas_ha);
762 spin_lock_irq(&sas_ha->phy_port_lock);
763 for (i = 0; i < sas_ha->num_phys; i++) {
764 struct asd_sas_port *port = sas_ha->sas_port[i];
765 struct domain_device *dev;
767 spin_lock(&port->dev_list_lock);
768 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
769 if (!dev_is_sata(dev))
772 /* hold a reference over eh since we may be
773 * racing with final remove once all commands
776 kref_get(&dev->kref);
778 async_schedule_domain(async_sas_ata_eh, dev, &async);
780 spin_unlock(&port->dev_list_lock);
782 spin_unlock_irq(&sas_ha->phy_port_lock);
784 async_synchronize_full_domain(&async);
786 sas_enable_revalidation(sas_ha);
789 void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
790 struct list_head *done_q)
792 struct scsi_cmnd *cmd, *n;
793 struct domain_device *eh_dev;
799 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
800 struct domain_device *ddev = cmd_to_domain_dev(cmd);
802 if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd))
804 if (eh_dev && eh_dev != ddev)
807 list_move(&cmd->eh_entry, &sata_q);
810 if (!list_empty(&sata_q)) {
811 struct ata_port *ap = eh_dev->sata_dev.ap;
813 sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n");
814 ata_scsi_cmd_error_handler(shost, ap, &sata_q);
816 * ata's error handler may leave the cmd on the list
817 * so make sure they don't remain on a stack list
818 * about to go out of scope.
820 * This looks strange, since the commands are
821 * now part of no list, but the next error
822 * action will be ata_port_error_handler()
823 * which takes no list and sweeps them up
824 * anyway from the ata tag array.
826 while (!list_empty(&sata_q))
827 list_del_init(sata_q.next);
832 void sas_ata_schedule_reset(struct domain_device *dev)
834 struct ata_eh_info *ehi;
838 if (!dev_is_sata(dev))
841 ap = dev->sata_dev.ap;
842 ehi = &ap->link.eh_info;
844 spin_lock_irqsave(ap->lock, flags);
845 ehi->err_mask |= AC_ERR_TIMEOUT;
846 ehi->action |= ATA_EH_RESET;
847 ata_port_schedule_eh(ap);
848 spin_unlock_irqrestore(ap->lock, flags);
850 EXPORT_SYMBOL_GPL(sas_ata_schedule_reset);
852 void sas_ata_wait_eh(struct domain_device *dev)
856 if (!dev_is_sata(dev))
859 ap = dev->sata_dev.ap;
860 ata_port_wait_eh(ap);