2 * Serial Attached SCSI (SAS) class SCSI Host glue.
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
7 * This file is licensed under GPLv2.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of the
12 * License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
26 #include <linux/kthread.h>
27 #include <linux/firmware.h>
28 #include <linux/export.h>
29 #include <linux/ctype.h>
30 #include <linux/kernel.h>
32 #include "sas_internal.h"
34 #include <scsi/scsi_host.h>
35 #include <scsi/scsi_device.h>
36 #include <scsi/scsi_tcq.h>
37 #include <scsi/scsi.h>
38 #include <scsi/scsi_eh.h>
39 #include <scsi/scsi_transport.h>
40 #include <scsi/scsi_transport_sas.h>
41 #include <scsi/sas_ata.h>
42 #include "../scsi_sas_internal.h"
43 #include "../scsi_transport_api.h"
44 #include "../scsi_priv.h"
46 #include <linux/err.h>
47 #include <linux/blkdev.h>
48 #include <linux/freezer.h>
49 #include <linux/gfp.h>
50 #include <linux/scatterlist.h>
51 #include <linux/libata.h>
53 /* record final status and free the task */
54 static void sas_end_task(struct scsi_cmnd *sc, struct sas_task *task)
56 struct task_status_struct *ts = &task->task_status;
59 if (ts->resp == SAS_TASK_UNDELIVERED) {
62 } else { /* ts->resp == SAS_TASK_COMPLETE */
63 /* task delivered, what happened afterwards? */
65 case SAS_DEV_NO_RESPONSE:
72 case SAS_DATA_UNDERRUN:
73 scsi_set_resid(sc, ts->residual);
74 if (scsi_bufflen(sc) - scsi_get_resid(sc) < sc->underflow)
77 case SAS_DATA_OVERRUN:
81 hs = DID_SOFT_ERROR; /* retry */
83 case SAS_DEVICE_UNKNOWN:
90 if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY)
91 hs = DID_SOFT_ERROR; /* retry */
95 case SAS_PROTO_RESPONSE:
96 SAS_DPRINTK("LLDD:%s sent SAS_PROTO_RESP for an SSP "
97 "task; please report this\n",
98 task->dev->port->ha->sas_ha_name);
100 case SAS_ABORTED_TASK:
103 case SAM_STAT_CHECK_CONDITION:
104 memcpy(sc->sense_buffer, ts->buf,
105 min(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size));
106 stat = SAM_STAT_CHECK_CONDITION;
114 sc->result = (hs << 16) | stat;
115 ASSIGN_SAS_TASK(sc, NULL);
119 static void sas_scsi_task_done(struct sas_task *task)
121 struct scsi_cmnd *sc = task->uldd_task;
122 struct domain_device *dev = task->dev;
123 struct sas_ha_struct *ha = dev->port->ha;
126 spin_lock_irqsave(&dev->done_lock, flags);
127 if (test_bit(SAS_HA_FROZEN, &ha->state))
130 ASSIGN_SAS_TASK(sc, NULL);
131 spin_unlock_irqrestore(&dev->done_lock, flags);
133 if (unlikely(!task)) {
134 /* task will be completed by the error handler */
135 SAS_DPRINTK("task done but aborted\n");
140 SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n");
145 sas_end_task(sc, task);
149 static struct sas_task *sas_create_task(struct scsi_cmnd *cmd,
150 struct domain_device *dev,
153 struct sas_task *task = sas_alloc_task(gfp_flags);
159 task->uldd_task = cmd;
160 ASSIGN_SAS_TASK(cmd, task);
163 task->task_proto = task->dev->tproto; /* BUG_ON(!SSP) */
165 task->ssp_task.retry_count = 1;
166 int_to_scsilun(cmd->device->lun, &lun);
167 memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8);
168 task->ssp_task.task_attr = TASK_ATTR_SIMPLE;
169 task->ssp_task.cmd = cmd;
171 task->scatter = scsi_sglist(cmd);
172 task->num_scatter = scsi_sg_count(cmd);
173 task->total_xfer_len = scsi_bufflen(cmd);
174 task->data_dir = cmd->sc_data_direction;
176 task->task_done = sas_scsi_task_done;
181 int sas_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
183 struct sas_internal *i = to_sas_internal(host->transportt);
184 struct domain_device *dev = cmd_to_domain_dev(cmd);
185 struct sas_task *task;
188 /* If the device fell off, no sense in issuing commands */
189 if (test_bit(SAS_DEV_GONE, &dev->state)) {
190 cmd->result = DID_BAD_TARGET << 16;
194 if (dev_is_sata(dev)) {
195 spin_lock_irq(dev->sata_dev.ap->lock);
196 res = ata_sas_queuecmd(cmd, dev->sata_dev.ap);
197 spin_unlock_irq(dev->sata_dev.ap->lock);
201 task = sas_create_task(cmd, dev, GFP_ATOMIC);
203 return SCSI_MLQUEUE_HOST_BUSY;
205 res = i->dft->lldd_execute_task(task, GFP_ATOMIC);
211 SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
212 ASSIGN_SAS_TASK(cmd, NULL);
214 if (res == -SAS_QUEUE_FULL)
215 cmd->result = DID_SOFT_ERROR << 16; /* retry */
217 cmd->result = DID_ERROR << 16;
223 static void sas_eh_finish_cmd(struct scsi_cmnd *cmd)
225 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(cmd->device->host);
226 struct domain_device *dev = cmd_to_domain_dev(cmd);
227 struct sas_task *task = TO_SAS_TASK(cmd);
229 /* At this point, we only get called following an actual abort
230 * of the task, so we should be guaranteed not to be racing with
231 * any completions from the LLD. Task is freed after this.
233 sas_end_task(cmd, task);
235 if (dev_is_sata(dev)) {
236 /* defer commands to libata so that libata EH can
237 * handle ata qcs correctly
239 list_move_tail(&cmd->eh_entry, &sas_ha->eh_ata_q);
243 /* now finish the command and move it on to the error
244 * handler done list, this also takes it off the
245 * error handler pending list.
247 scsi_eh_finish_cmd(cmd, &sas_ha->eh_done_q);
250 static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd)
252 struct scsi_cmnd *cmd, *n;
254 list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
255 if (cmd->device->sdev_target == my_cmd->device->sdev_target &&
256 cmd->device->lun == my_cmd->device->lun)
257 sas_eh_finish_cmd(cmd);
261 static void sas_scsi_clear_queue_I_T(struct list_head *error_q,
262 struct domain_device *dev)
264 struct scsi_cmnd *cmd, *n;
266 list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
267 struct domain_device *x = cmd_to_domain_dev(cmd);
270 sas_eh_finish_cmd(cmd);
274 static void sas_scsi_clear_queue_port(struct list_head *error_q,
275 struct asd_sas_port *port)
277 struct scsi_cmnd *cmd, *n;
279 list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
280 struct domain_device *dev = cmd_to_domain_dev(cmd);
281 struct asd_sas_port *x = dev->port;
284 sas_eh_finish_cmd(cmd);
288 enum task_disposition {
296 static enum task_disposition sas_scsi_find_task(struct sas_task *task)
300 struct sas_internal *si =
301 to_sas_internal(task->dev->port->ha->core.shost->transportt);
303 for (i = 0; i < 5; i++) {
304 SAS_DPRINTK("%s: aborting task 0x%p\n", __func__, task);
305 res = si->dft->lldd_abort_task(task);
307 spin_lock_irqsave(&task->task_state_lock, flags);
308 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
309 spin_unlock_irqrestore(&task->task_state_lock, flags);
310 SAS_DPRINTK("%s: task 0x%p is done\n", __func__,
314 spin_unlock_irqrestore(&task->task_state_lock, flags);
316 if (res == TMF_RESP_FUNC_COMPLETE) {
317 SAS_DPRINTK("%s: task 0x%p is aborted\n",
319 return TASK_IS_ABORTED;
320 } else if (si->dft->lldd_query_task) {
321 SAS_DPRINTK("%s: querying task 0x%p\n",
323 res = si->dft->lldd_query_task(task);
325 case TMF_RESP_FUNC_SUCC:
326 SAS_DPRINTK("%s: task 0x%p at LU\n",
328 return TASK_IS_AT_LU;
329 case TMF_RESP_FUNC_COMPLETE:
330 SAS_DPRINTK("%s: task 0x%p not at LU\n",
332 return TASK_IS_NOT_AT_LU;
333 case TMF_RESP_FUNC_FAILED:
334 SAS_DPRINTK("%s: task 0x%p failed to abort\n",
336 return TASK_ABORT_FAILED;
344 static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd)
346 int res = TMF_RESP_FUNC_FAILED;
348 struct sas_internal *i =
349 to_sas_internal(dev->port->ha->core.shost->transportt);
351 int_to_scsilun(cmd->device->lun, &lun);
353 SAS_DPRINTK("eh: device %llx LUN %llx has the task\n",
354 SAS_ADDR(dev->sas_addr),
357 if (i->dft->lldd_abort_task_set)
358 res = i->dft->lldd_abort_task_set(dev, lun.scsi_lun);
360 if (res == TMF_RESP_FUNC_FAILED) {
361 if (i->dft->lldd_clear_task_set)
362 res = i->dft->lldd_clear_task_set(dev, lun.scsi_lun);
365 if (res == TMF_RESP_FUNC_FAILED) {
366 if (i->dft->lldd_lu_reset)
367 res = i->dft->lldd_lu_reset(dev, lun.scsi_lun);
373 static int sas_recover_I_T(struct domain_device *dev)
375 int res = TMF_RESP_FUNC_FAILED;
376 struct sas_internal *i =
377 to_sas_internal(dev->port->ha->core.shost->transportt);
379 SAS_DPRINTK("I_T nexus reset for dev %016llx\n",
380 SAS_ADDR(dev->sas_addr));
382 if (i->dft->lldd_I_T_nexus_reset)
383 res = i->dft->lldd_I_T_nexus_reset(dev);
388 /* take a reference on the last known good phy for this device */
389 struct sas_phy *sas_get_local_phy(struct domain_device *dev)
391 struct sas_ha_struct *ha = dev->port->ha;
395 /* a published domain device always has a valid phy, it may be
396 * stale, but it is never NULL
400 spin_lock_irqsave(&ha->phy_port_lock, flags);
402 get_device(&phy->dev);
403 spin_unlock_irqrestore(&ha->phy_port_lock, flags);
407 EXPORT_SYMBOL_GPL(sas_get_local_phy);
409 static void sas_wait_eh(struct domain_device *dev)
411 struct sas_ha_struct *ha = dev->port->ha;
414 if (dev_is_sata(dev)) {
415 ata_port_wait_eh(dev->sata_dev.ap);
419 spin_lock_irq(&ha->lock);
421 while (test_bit(SAS_DEV_EH_PENDING, &dev->state)) {
422 prepare_to_wait(&ha->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE);
423 spin_unlock_irq(&ha->lock);
425 spin_lock_irq(&ha->lock);
427 finish_wait(&ha->eh_wait_q, &wait);
429 spin_unlock_irq(&ha->lock);
431 /* make sure SCSI EH is complete */
432 if (scsi_host_in_recovery(ha->core.shost)) {
437 EXPORT_SYMBOL(sas_wait_eh);
439 static int sas_queue_reset(struct domain_device *dev, int reset_type,
442 struct sas_ha_struct *ha = dev->port->ha;
443 int scheduled = 0, tries = 100;
445 /* ata: promote lun reset to bus reset */
446 if (dev_is_sata(dev)) {
447 sas_ata_schedule_reset(dev);
449 sas_ata_wait_eh(dev);
453 while (!scheduled && tries--) {
454 spin_lock_irq(&ha->lock);
455 if (!test_bit(SAS_DEV_EH_PENDING, &dev->state) &&
456 !test_bit(reset_type, &dev->state)) {
459 list_add_tail(&dev->ssp_dev.eh_list_node, &ha->eh_dev_q);
460 set_bit(SAS_DEV_EH_PENDING, &dev->state);
461 set_bit(reset_type, &dev->state);
462 int_to_scsilun(lun, &dev->ssp_dev.reset_lun);
463 scsi_schedule_eh(ha->core.shost);
465 spin_unlock_irq(&ha->lock);
474 SAS_DPRINTK("%s reset of %s failed\n",
475 reset_type == SAS_DEV_LU_RESET ? "LUN" : "Bus",
476 dev_name(&dev->rphy->dev));
481 int sas_eh_abort_handler(struct scsi_cmnd *cmd)
484 struct sas_task *task = TO_SAS_TASK(cmd);
485 struct Scsi_Host *host = cmd->device->host;
486 struct sas_internal *i = to_sas_internal(host->transportt);
488 if (!i->dft->lldd_abort_task)
491 res = i->dft->lldd_abort_task(task);
492 if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE)
497 EXPORT_SYMBOL_GPL(sas_eh_abort_handler);
499 /* Attempt to send a LUN reset message to a device */
500 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd)
504 struct Scsi_Host *host = cmd->device->host;
505 struct domain_device *dev = cmd_to_domain_dev(cmd);
506 struct sas_internal *i = to_sas_internal(host->transportt);
508 if (current != host->ehandler)
509 return sas_queue_reset(dev, SAS_DEV_LU_RESET, cmd->device->lun, 0);
511 int_to_scsilun(cmd->device->lun, &lun);
513 if (!i->dft->lldd_lu_reset)
516 res = i->dft->lldd_lu_reset(dev, lun.scsi_lun);
517 if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE)
523 int sas_eh_target_reset_handler(struct scsi_cmnd *cmd)
526 struct Scsi_Host *host = cmd->device->host;
527 struct domain_device *dev = cmd_to_domain_dev(cmd);
528 struct sas_internal *i = to_sas_internal(host->transportt);
530 if (current != host->ehandler)
531 return sas_queue_reset(dev, SAS_DEV_RESET, 0, 0);
533 if (!i->dft->lldd_I_T_nexus_reset)
536 res = i->dft->lldd_I_T_nexus_reset(dev);
537 if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE ||
544 /* Try to reset a device */
545 static int try_to_reset_cmd_device(struct scsi_cmnd *cmd)
548 struct Scsi_Host *shost = cmd->device->host;
550 if (!shost->hostt->eh_device_reset_handler)
551 goto try_target_reset;
553 res = shost->hostt->eh_device_reset_handler(cmd);
558 if (shost->hostt->eh_target_reset_handler)
559 return shost->hostt->eh_target_reset_handler(cmd);
564 static void sas_eh_handle_sas_errors(struct Scsi_Host *shost, struct list_head *work_q)
566 struct scsi_cmnd *cmd, *n;
567 enum task_disposition res = TASK_IS_DONE;
568 int tmf_resp, need_reset;
569 struct sas_internal *i = to_sas_internal(shost->transportt);
571 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
574 /* clean out any commands that won the completion vs eh race */
575 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
576 struct domain_device *dev = cmd_to_domain_dev(cmd);
577 struct sas_task *task;
579 spin_lock_irqsave(&dev->done_lock, flags);
580 /* by this point the lldd has either observed
581 * SAS_HA_FROZEN and is leaving the task alone, or has
582 * won the race with eh and decided to complete it
584 task = TO_SAS_TASK(cmd);
585 spin_unlock_irqrestore(&dev->done_lock, flags);
588 list_move_tail(&cmd->eh_entry, &done);
592 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
593 struct sas_task *task = TO_SAS_TASK(cmd);
595 list_del_init(&cmd->eh_entry);
597 spin_lock_irqsave(&task->task_state_lock, flags);
598 need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET;
599 spin_unlock_irqrestore(&task->task_state_lock, flags);
602 SAS_DPRINTK("%s: task 0x%p requests reset\n",
607 SAS_DPRINTK("trying to find task 0x%p\n", task);
608 res = sas_scsi_find_task(task);
612 SAS_DPRINTK("%s: task 0x%p is done\n", __func__,
614 sas_eh_finish_cmd(cmd);
616 case TASK_IS_ABORTED:
617 SAS_DPRINTK("%s: task 0x%p is aborted\n",
619 sas_eh_finish_cmd(cmd);
622 SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task);
624 tmf_resp = sas_recover_lu(task->dev, cmd);
625 if (tmf_resp == TMF_RESP_FUNC_COMPLETE) {
626 SAS_DPRINTK("dev %016llx LU %llx is "
630 sas_eh_finish_cmd(cmd);
631 sas_scsi_clear_queue_lu(work_q, cmd);
635 case TASK_IS_NOT_AT_LU:
636 case TASK_ABORT_FAILED:
637 SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n",
639 tmf_resp = sas_recover_I_T(task->dev);
640 if (tmf_resp == TMF_RESP_FUNC_COMPLETE ||
641 tmf_resp == -ENODEV) {
642 struct domain_device *dev = task->dev;
643 SAS_DPRINTK("I_T %016llx recovered\n",
644 SAS_ADDR(task->dev->sas_addr));
645 sas_eh_finish_cmd(cmd);
646 sas_scsi_clear_queue_I_T(work_q, dev);
649 /* Hammer time :-) */
650 try_to_reset_cmd_device(cmd);
651 if (i->dft->lldd_clear_nexus_port) {
652 struct asd_sas_port *port = task->dev->port;
653 SAS_DPRINTK("clearing nexus for port:%d\n",
655 res = i->dft->lldd_clear_nexus_port(port);
656 if (res == TMF_RESP_FUNC_COMPLETE) {
657 SAS_DPRINTK("clear nexus port:%d "
658 "succeeded\n", port->id);
659 sas_eh_finish_cmd(cmd);
660 sas_scsi_clear_queue_port(work_q,
665 if (i->dft->lldd_clear_nexus_ha) {
666 SAS_DPRINTK("clear nexus ha\n");
667 res = i->dft->lldd_clear_nexus_ha(ha);
668 if (res == TMF_RESP_FUNC_COMPLETE) {
669 SAS_DPRINTK("clear nexus ha "
671 sas_eh_finish_cmd(cmd);
675 /* If we are here -- this means that no amount
676 * of effort could recover from errors. Quite
677 * possibly the HA just disappeared.
679 SAS_DPRINTK("error from device %llx, LUN %llx "
680 "couldn't be recovered in any way\n",
681 SAS_ADDR(task->dev->sas_addr),
684 sas_eh_finish_cmd(cmd);
689 list_splice_tail(&done, work_q);
690 list_splice_tail_init(&ha->eh_ata_q, work_q);
694 SAS_DPRINTK("--- Exit %s -- clear_q\n", __func__);
695 list_for_each_entry_safe(cmd, n, work_q, eh_entry)
696 sas_eh_finish_cmd(cmd);
700 static void sas_eh_handle_resets(struct Scsi_Host *shost)
702 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
703 struct sas_internal *i = to_sas_internal(shost->transportt);
705 /* handle directed resets to sas devices */
706 spin_lock_irq(&ha->lock);
707 while (!list_empty(&ha->eh_dev_q)) {
708 struct domain_device *dev;
709 struct ssp_device *ssp;
711 ssp = list_entry(ha->eh_dev_q.next, typeof(*ssp), eh_list_node);
712 list_del_init(&ssp->eh_list_node);
713 dev = container_of(ssp, typeof(*dev), ssp_dev);
714 kref_get(&dev->kref);
715 WARN_ONCE(dev_is_sata(dev), "ssp reset to ata device?\n");
717 spin_unlock_irq(&ha->lock);
719 if (test_and_clear_bit(SAS_DEV_LU_RESET, &dev->state))
720 i->dft->lldd_lu_reset(dev, ssp->reset_lun.scsi_lun);
722 if (test_and_clear_bit(SAS_DEV_RESET, &dev->state))
723 i->dft->lldd_I_T_nexus_reset(dev);
726 spin_lock_irq(&ha->lock);
727 clear_bit(SAS_DEV_EH_PENDING, &dev->state);
730 spin_unlock_irq(&ha->lock);
734 void sas_scsi_recover_host(struct Scsi_Host *shost)
736 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
737 LIST_HEAD(eh_work_q);
744 spin_lock_irq(shost->host_lock);
745 list_splice_init(&shost->eh_cmd_q, &eh_work_q);
746 spin_unlock_irq(shost->host_lock);
748 SAS_DPRINTK("Enter %s busy: %d failed: %d\n",
749 __func__, atomic_read(&shost->host_busy), shost->host_failed);
751 * Deal with commands that still have SAS tasks (i.e. they didn't
752 * complete via the normal sas_task completion mechanism),
753 * SAS_HA_FROZEN gives eh dominion over all sas_task completion.
755 set_bit(SAS_HA_FROZEN, &ha->state);
756 sas_eh_handle_sas_errors(shost, &eh_work_q);
757 clear_bit(SAS_HA_FROZEN, &ha->state);
758 if (list_empty(&eh_work_q))
762 * Now deal with SCSI commands that completed ok but have a an error
763 * code (and hopefully sense data) attached. This is roughly what
764 * scsi_unjam_host does, but we skip scsi_eh_abort_cmds because any
765 * command we see here has no sas_task and is thus unknown to the HA.
767 sas_ata_eh(shost, &eh_work_q, &ha->eh_done_q);
768 if (!scsi_eh_get_sense(&eh_work_q, &ha->eh_done_q))
769 scsi_eh_ready_devs(shost, &eh_work_q, &ha->eh_done_q);
772 sas_eh_handle_resets(shost);
774 /* now link into libata eh --- if we have any ata devices */
775 sas_ata_strategy_handler(shost);
777 scsi_eh_flush_done_q(&ha->eh_done_q);
779 /* check if any new eh work was scheduled during the last run */
780 spin_lock_irq(&ha->lock);
781 if (ha->eh_active == 0) {
782 shost->host_eh_scheduled = 0;
785 spin_unlock_irq(&ha->lock);
790 SAS_DPRINTK("--- Exit %s: busy: %d failed: %d tries: %d\n",
791 __func__, atomic_read(&shost->host_busy),
792 shost->host_failed, tries);
795 int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
797 struct domain_device *dev = sdev_to_domain_dev(sdev);
799 if (dev_is_sata(dev))
800 return ata_sas_scsi_ioctl(dev->sata_dev.ap, sdev, cmd, arg);
805 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy)
807 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent);
808 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
809 struct domain_device *found_dev = NULL;
813 spin_lock_irqsave(&ha->phy_port_lock, flags);
814 for (i = 0; i < ha->num_phys; i++) {
815 struct asd_sas_port *port = ha->sas_port[i];
816 struct domain_device *dev;
818 spin_lock(&port->dev_list_lock);
819 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
820 if (rphy == dev->rphy) {
822 spin_unlock(&port->dev_list_lock);
826 spin_unlock(&port->dev_list_lock);
829 spin_unlock_irqrestore(&ha->phy_port_lock, flags);
834 int sas_target_alloc(struct scsi_target *starget)
836 struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent);
837 struct domain_device *found_dev = sas_find_dev_by_rphy(rphy);
842 kref_get(&found_dev->kref);
843 starget->hostdata = found_dev;
847 #define SAS_DEF_QD 256
849 int sas_slave_configure(struct scsi_device *scsi_dev)
851 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
853 BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE);
855 if (dev_is_sata(dev)) {
856 ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap);
860 sas_read_port_mode_page(scsi_dev);
862 if (scsi_dev->tagged_supported) {
863 scsi_change_queue_depth(scsi_dev, SAS_DEF_QD);
865 SAS_DPRINTK("device %llx, LUN %llx doesn't support "
866 "TCQ\n", SAS_ADDR(dev->sas_addr),
868 scsi_change_queue_depth(scsi_dev, 1);
871 scsi_dev->allow_restart = 1;
876 int sas_change_queue_depth(struct scsi_device *sdev, int depth)
878 struct domain_device *dev = sdev_to_domain_dev(sdev);
880 if (dev_is_sata(dev))
881 return __ata_change_queue_depth(dev->sata_dev.ap, sdev, depth);
883 if (!sdev->tagged_supported)
885 return scsi_change_queue_depth(sdev, depth);
888 int sas_bios_param(struct scsi_device *scsi_dev,
889 struct block_device *bdev,
890 sector_t capacity, int *hsc)
894 sector_div(capacity, 255*63);
901 * Tell an upper layer that it needs to initiate an abort for a given task.
902 * This should only ever be called by an LLDD.
904 void sas_task_abort(struct sas_task *task)
906 struct scsi_cmnd *sc = task->uldd_task;
908 /* Escape for libsas internal commands */
910 struct sas_task_slow *slow = task->slow_task;
914 if (!del_timer(&slow->timer))
916 slow->timer.function(&slow->timer);
920 if (dev_is_sata(task->dev)) {
921 sas_ata_task_abort(task);
923 struct request_queue *q = sc->device->request_queue;
926 spin_lock_irqsave(q->queue_lock, flags);
927 blk_abort_request(sc->request);
928 spin_unlock_irqrestore(q->queue_lock, flags);
932 void sas_target_destroy(struct scsi_target *starget)
934 struct domain_device *found_dev = starget->hostdata;
939 starget->hostdata = NULL;
940 sas_put_device(found_dev);
943 #define SAS_STRING_ADDR_SIZE 16
945 int sas_request_addr(struct Scsi_Host *shost, u8 *addr)
948 const struct firmware *fw;
950 res = request_firmware(&fw, "sas_addr", &shost->shost_gendev);
954 if (fw->size < SAS_STRING_ADDR_SIZE) {
959 res = hex2bin(addr, fw->data, strnlen(fw->data, SAS_ADDR_SIZE * 2) / 2);
964 release_firmware(fw);
967 EXPORT_SYMBOL_GPL(sas_request_addr);
969 EXPORT_SYMBOL_GPL(sas_queuecommand);
970 EXPORT_SYMBOL_GPL(sas_target_alloc);
971 EXPORT_SYMBOL_GPL(sas_slave_configure);
972 EXPORT_SYMBOL_GPL(sas_change_queue_depth);
973 EXPORT_SYMBOL_GPL(sas_bios_param);
974 EXPORT_SYMBOL_GPL(sas_task_abort);
975 EXPORT_SYMBOL_GPL(sas_phy_reset);
976 EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler);
977 EXPORT_SYMBOL_GPL(sas_eh_target_reset_handler);
978 EXPORT_SYMBOL_GPL(sas_target_destroy);
979 EXPORT_SYMBOL_GPL(sas_ioctl);