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>
31 #include "sas_internal.h"
33 #include <scsi/scsi_host.h>
34 #include <scsi/scsi_device.h>
35 #include <scsi/scsi_tcq.h>
36 #include <scsi/scsi.h>
37 #include <scsi/scsi_eh.h>
38 #include <scsi/scsi_transport.h>
39 #include <scsi/scsi_transport_sas.h>
40 #include <scsi/sas_ata.h>
41 #include "../scsi_sas_internal.h"
42 #include "../scsi_transport_api.h"
43 #include "../scsi_priv.h"
45 #include <linux/err.h>
46 #include <linux/blkdev.h>
47 #include <linux/freezer.h>
48 #include <linux/gfp.h>
49 #include <linux/scatterlist.h>
50 #include <linux/libata.h>
52 /* record final status and free the task */
53 static void sas_end_task(struct scsi_cmnd *sc, struct sas_task *task)
55 struct task_status_struct *ts = &task->task_status;
58 if (ts->resp == SAS_TASK_UNDELIVERED) {
61 } else { /* ts->resp == SAS_TASK_COMPLETE */
62 /* task delivered, what happened afterwards? */
64 case SAS_DEV_NO_RESPONSE:
71 case SAS_DATA_UNDERRUN:
72 scsi_set_resid(sc, ts->residual);
73 if (scsi_bufflen(sc) - scsi_get_resid(sc) < sc->underflow)
76 case SAS_DATA_OVERRUN:
80 hs = DID_SOFT_ERROR; /* retry */
82 case SAS_DEVICE_UNKNOWN:
89 if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY)
90 hs = DID_SOFT_ERROR; /* retry */
94 case SAS_PROTO_RESPONSE:
95 SAS_DPRINTK("LLDD:%s sent SAS_PROTO_RESP for an SSP "
96 "task; please report this\n",
97 task->dev->port->ha->sas_ha_name);
99 case SAS_ABORTED_TASK:
102 case SAM_STAT_CHECK_CONDITION:
103 memcpy(sc->sense_buffer, ts->buf,
104 min(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size));
105 stat = SAM_STAT_CHECK_CONDITION;
113 sc->result = (hs << 16) | stat;
114 ASSIGN_SAS_TASK(sc, NULL);
118 static void sas_scsi_task_done(struct sas_task *task)
120 struct scsi_cmnd *sc = task->uldd_task;
121 struct domain_device *dev = task->dev;
122 struct sas_ha_struct *ha = dev->port->ha;
125 spin_lock_irqsave(&dev->done_lock, flags);
126 if (test_bit(SAS_HA_FROZEN, &ha->state))
129 ASSIGN_SAS_TASK(sc, NULL);
130 spin_unlock_irqrestore(&dev->done_lock, flags);
132 if (unlikely(!task)) {
133 /* task will be completed by the error handler */
134 SAS_DPRINTK("task done but aborted\n");
139 SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n");
144 sas_end_task(sc, task);
148 static struct sas_task *sas_create_task(struct scsi_cmnd *cmd,
149 struct domain_device *dev,
152 struct sas_task *task = sas_alloc_task(gfp_flags);
158 task->uldd_task = cmd;
159 ASSIGN_SAS_TASK(cmd, task);
162 task->task_proto = task->dev->tproto; /* BUG_ON(!SSP) */
164 task->ssp_task.retry_count = 1;
165 int_to_scsilun(cmd->device->lun, &lun);
166 memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8);
167 task->ssp_task.task_attr = TASK_ATTR_SIMPLE;
168 task->ssp_task.cmd = cmd;
170 task->scatter = scsi_sglist(cmd);
171 task->num_scatter = scsi_sg_count(cmd);
172 task->total_xfer_len = scsi_bufflen(cmd);
173 task->data_dir = cmd->sc_data_direction;
175 task->task_done = sas_scsi_task_done;
180 int sas_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
182 struct sas_internal *i = to_sas_internal(host->transportt);
183 struct domain_device *dev = cmd_to_domain_dev(cmd);
184 struct sas_task *task;
187 /* If the device fell off, no sense in issuing commands */
188 if (test_bit(SAS_DEV_GONE, &dev->state)) {
189 cmd->result = DID_BAD_TARGET << 16;
193 if (dev_is_sata(dev)) {
194 spin_lock_irq(dev->sata_dev.ap->lock);
195 res = ata_sas_queuecmd(cmd, dev->sata_dev.ap);
196 spin_unlock_irq(dev->sata_dev.ap->lock);
200 task = sas_create_task(cmd, dev, GFP_ATOMIC);
202 return SCSI_MLQUEUE_HOST_BUSY;
204 res = i->dft->lldd_execute_task(task, GFP_ATOMIC);
210 SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
211 ASSIGN_SAS_TASK(cmd, NULL);
213 if (res == -SAS_QUEUE_FULL)
214 cmd->result = DID_SOFT_ERROR << 16; /* retry */
216 cmd->result = DID_ERROR << 16;
222 static void sas_eh_finish_cmd(struct scsi_cmnd *cmd)
224 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(cmd->device->host);
225 struct sas_task *task = TO_SAS_TASK(cmd);
227 /* At this point, we only get called following an actual abort
228 * of the task, so we should be guaranteed not to be racing with
229 * any completions from the LLD. Task is freed after this.
231 sas_end_task(cmd, task);
233 /* now finish the command and move it on to the error
234 * handler done list, this also takes it off the
235 * error handler pending list.
237 scsi_eh_finish_cmd(cmd, &sas_ha->eh_done_q);
240 static void sas_eh_defer_cmd(struct scsi_cmnd *cmd)
242 struct domain_device *dev = cmd_to_domain_dev(cmd);
243 struct sas_ha_struct *ha = dev->port->ha;
244 struct sas_task *task = TO_SAS_TASK(cmd);
246 if (!dev_is_sata(dev)) {
247 sas_eh_finish_cmd(cmd);
251 /* report the timeout to libata */
252 sas_end_task(cmd, task);
253 list_move_tail(&cmd->eh_entry, &ha->eh_ata_q);
256 static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd)
258 struct scsi_cmnd *cmd, *n;
260 list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
261 if (cmd->device->sdev_target == my_cmd->device->sdev_target &&
262 cmd->device->lun == my_cmd->device->lun)
263 sas_eh_defer_cmd(cmd);
267 static void sas_scsi_clear_queue_I_T(struct list_head *error_q,
268 struct domain_device *dev)
270 struct scsi_cmnd *cmd, *n;
272 list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
273 struct domain_device *x = cmd_to_domain_dev(cmd);
276 sas_eh_finish_cmd(cmd);
280 static void sas_scsi_clear_queue_port(struct list_head *error_q,
281 struct asd_sas_port *port)
283 struct scsi_cmnd *cmd, *n;
285 list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
286 struct domain_device *dev = cmd_to_domain_dev(cmd);
287 struct asd_sas_port *x = dev->port;
290 sas_eh_finish_cmd(cmd);
294 enum task_disposition {
302 static enum task_disposition sas_scsi_find_task(struct sas_task *task)
306 struct sas_internal *si =
307 to_sas_internal(task->dev->port->ha->core.shost->transportt);
309 for (i = 0; i < 5; i++) {
310 SAS_DPRINTK("%s: aborting task 0x%p\n", __func__, task);
311 res = si->dft->lldd_abort_task(task);
313 spin_lock_irqsave(&task->task_state_lock, flags);
314 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
315 spin_unlock_irqrestore(&task->task_state_lock, flags);
316 SAS_DPRINTK("%s: task 0x%p is done\n", __func__,
320 spin_unlock_irqrestore(&task->task_state_lock, flags);
322 if (res == TMF_RESP_FUNC_COMPLETE) {
323 SAS_DPRINTK("%s: task 0x%p is aborted\n",
325 return TASK_IS_ABORTED;
326 } else if (si->dft->lldd_query_task) {
327 SAS_DPRINTK("%s: querying task 0x%p\n",
329 res = si->dft->lldd_query_task(task);
331 case TMF_RESP_FUNC_SUCC:
332 SAS_DPRINTK("%s: task 0x%p at LU\n",
334 return TASK_IS_AT_LU;
335 case TMF_RESP_FUNC_COMPLETE:
336 SAS_DPRINTK("%s: task 0x%p not at LU\n",
338 return TASK_IS_NOT_AT_LU;
339 case TMF_RESP_FUNC_FAILED:
340 SAS_DPRINTK("%s: task 0x%p failed to abort\n",
342 return TASK_ABORT_FAILED;
350 static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd)
352 int res = TMF_RESP_FUNC_FAILED;
354 struct sas_internal *i =
355 to_sas_internal(dev->port->ha->core.shost->transportt);
357 int_to_scsilun(cmd->device->lun, &lun);
359 SAS_DPRINTK("eh: device %llx LUN %llx has the task\n",
360 SAS_ADDR(dev->sas_addr),
363 if (i->dft->lldd_abort_task_set)
364 res = i->dft->lldd_abort_task_set(dev, lun.scsi_lun);
366 if (res == TMF_RESP_FUNC_FAILED) {
367 if (i->dft->lldd_clear_task_set)
368 res = i->dft->lldd_clear_task_set(dev, lun.scsi_lun);
371 if (res == TMF_RESP_FUNC_FAILED) {
372 if (i->dft->lldd_lu_reset)
373 res = i->dft->lldd_lu_reset(dev, lun.scsi_lun);
379 static int sas_recover_I_T(struct domain_device *dev)
381 int res = TMF_RESP_FUNC_FAILED;
382 struct sas_internal *i =
383 to_sas_internal(dev->port->ha->core.shost->transportt);
385 SAS_DPRINTK("I_T nexus reset for dev %016llx\n",
386 SAS_ADDR(dev->sas_addr));
388 if (i->dft->lldd_I_T_nexus_reset)
389 res = i->dft->lldd_I_T_nexus_reset(dev);
394 /* take a reference on the last known good phy for this device */
395 struct sas_phy *sas_get_local_phy(struct domain_device *dev)
397 struct sas_ha_struct *ha = dev->port->ha;
401 /* a published domain device always has a valid phy, it may be
402 * stale, but it is never NULL
406 spin_lock_irqsave(&ha->phy_port_lock, flags);
408 get_device(&phy->dev);
409 spin_unlock_irqrestore(&ha->phy_port_lock, flags);
413 EXPORT_SYMBOL_GPL(sas_get_local_phy);
415 static void sas_wait_eh(struct domain_device *dev)
417 struct sas_ha_struct *ha = dev->port->ha;
420 if (dev_is_sata(dev)) {
421 ata_port_wait_eh(dev->sata_dev.ap);
425 spin_lock_irq(&ha->lock);
427 while (test_bit(SAS_DEV_EH_PENDING, &dev->state)) {
428 prepare_to_wait(&ha->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE);
429 spin_unlock_irq(&ha->lock);
431 spin_lock_irq(&ha->lock);
433 finish_wait(&ha->eh_wait_q, &wait);
435 spin_unlock_irq(&ha->lock);
437 /* make sure SCSI EH is complete */
438 if (scsi_host_in_recovery(ha->core.shost)) {
443 EXPORT_SYMBOL(sas_wait_eh);
445 static int sas_queue_reset(struct domain_device *dev, int reset_type,
448 struct sas_ha_struct *ha = dev->port->ha;
449 int scheduled = 0, tries = 100;
451 /* ata: promote lun reset to bus reset */
452 if (dev_is_sata(dev)) {
453 sas_ata_schedule_reset(dev);
455 sas_ata_wait_eh(dev);
459 while (!scheduled && tries--) {
460 spin_lock_irq(&ha->lock);
461 if (!test_bit(SAS_DEV_EH_PENDING, &dev->state) &&
462 !test_bit(reset_type, &dev->state)) {
465 list_add_tail(&dev->ssp_dev.eh_list_node, &ha->eh_dev_q);
466 set_bit(SAS_DEV_EH_PENDING, &dev->state);
467 set_bit(reset_type, &dev->state);
468 int_to_scsilun(lun, &dev->ssp_dev.reset_lun);
469 scsi_schedule_eh(ha->core.shost);
471 spin_unlock_irq(&ha->lock);
480 SAS_DPRINTK("%s reset of %s failed\n",
481 reset_type == SAS_DEV_LU_RESET ? "LUN" : "Bus",
482 dev_name(&dev->rphy->dev));
487 int sas_eh_abort_handler(struct scsi_cmnd *cmd)
489 int res = TMF_RESP_FUNC_FAILED;
490 struct sas_task *task = TO_SAS_TASK(cmd);
491 struct Scsi_Host *host = cmd->device->host;
492 struct domain_device *dev = cmd_to_domain_dev(cmd);
493 struct sas_internal *i = to_sas_internal(host->transportt);
496 if (!i->dft->lldd_abort_task)
499 spin_lock_irqsave(host->host_lock, flags);
500 /* We cannot do async aborts for SATA devices */
501 if (dev_is_sata(dev) && !host->host_eh_scheduled) {
502 spin_unlock_irqrestore(host->host_lock, flags);
505 spin_unlock_irqrestore(host->host_lock, flags);
508 res = i->dft->lldd_abort_task(task);
510 SAS_DPRINTK("no task to abort\n");
511 if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE)
516 EXPORT_SYMBOL_GPL(sas_eh_abort_handler);
518 /* Attempt to send a LUN reset message to a device */
519 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd)
523 struct Scsi_Host *host = cmd->device->host;
524 struct domain_device *dev = cmd_to_domain_dev(cmd);
525 struct sas_internal *i = to_sas_internal(host->transportt);
527 if (current != host->ehandler)
528 return sas_queue_reset(dev, SAS_DEV_LU_RESET, cmd->device->lun, 0);
530 int_to_scsilun(cmd->device->lun, &lun);
532 if (!i->dft->lldd_lu_reset)
535 res = i->dft->lldd_lu_reset(dev, lun.scsi_lun);
536 if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE)
542 int sas_eh_target_reset_handler(struct scsi_cmnd *cmd)
545 struct Scsi_Host *host = cmd->device->host;
546 struct domain_device *dev = cmd_to_domain_dev(cmd);
547 struct sas_internal *i = to_sas_internal(host->transportt);
549 if (current != host->ehandler)
550 return sas_queue_reset(dev, SAS_DEV_RESET, 0, 0);
552 if (!i->dft->lldd_I_T_nexus_reset)
555 res = i->dft->lldd_I_T_nexus_reset(dev);
556 if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE ||
563 /* Try to reset a device */
564 static int try_to_reset_cmd_device(struct scsi_cmnd *cmd)
567 struct Scsi_Host *shost = cmd->device->host;
569 if (!shost->hostt->eh_device_reset_handler)
570 goto try_target_reset;
572 res = shost->hostt->eh_device_reset_handler(cmd);
577 if (shost->hostt->eh_target_reset_handler)
578 return shost->hostt->eh_target_reset_handler(cmd);
583 static void sas_eh_handle_sas_errors(struct Scsi_Host *shost, struct list_head *work_q)
585 struct scsi_cmnd *cmd, *n;
586 enum task_disposition res = TASK_IS_DONE;
587 int tmf_resp, need_reset;
588 struct sas_internal *i = to_sas_internal(shost->transportt);
590 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
593 /* clean out any commands that won the completion vs eh race */
594 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
595 struct domain_device *dev = cmd_to_domain_dev(cmd);
596 struct sas_task *task;
598 spin_lock_irqsave(&dev->done_lock, flags);
599 /* by this point the lldd has either observed
600 * SAS_HA_FROZEN and is leaving the task alone, or has
601 * won the race with eh and decided to complete it
603 task = TO_SAS_TASK(cmd);
604 spin_unlock_irqrestore(&dev->done_lock, flags);
607 list_move_tail(&cmd->eh_entry, &done);
611 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
612 struct sas_task *task = TO_SAS_TASK(cmd);
614 list_del_init(&cmd->eh_entry);
616 spin_lock_irqsave(&task->task_state_lock, flags);
617 need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET;
618 spin_unlock_irqrestore(&task->task_state_lock, flags);
621 SAS_DPRINTK("%s: task 0x%p requests reset\n",
626 SAS_DPRINTK("trying to find task 0x%p\n", task);
627 res = sas_scsi_find_task(task);
631 SAS_DPRINTK("%s: task 0x%p is done\n", __func__,
633 sas_eh_defer_cmd(cmd);
635 case TASK_IS_ABORTED:
636 SAS_DPRINTK("%s: task 0x%p is aborted\n",
638 sas_eh_defer_cmd(cmd);
641 SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task);
643 tmf_resp = sas_recover_lu(task->dev, cmd);
644 if (tmf_resp == TMF_RESP_FUNC_COMPLETE) {
645 SAS_DPRINTK("dev %016llx LU %llx is "
649 sas_eh_defer_cmd(cmd);
650 sas_scsi_clear_queue_lu(work_q, cmd);
654 case TASK_IS_NOT_AT_LU:
655 case TASK_ABORT_FAILED:
656 SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n",
658 tmf_resp = sas_recover_I_T(task->dev);
659 if (tmf_resp == TMF_RESP_FUNC_COMPLETE ||
660 tmf_resp == -ENODEV) {
661 struct domain_device *dev = task->dev;
662 SAS_DPRINTK("I_T %016llx recovered\n",
663 SAS_ADDR(task->dev->sas_addr));
664 sas_eh_finish_cmd(cmd);
665 sas_scsi_clear_queue_I_T(work_q, dev);
668 /* Hammer time :-) */
669 try_to_reset_cmd_device(cmd);
670 if (i->dft->lldd_clear_nexus_port) {
671 struct asd_sas_port *port = task->dev->port;
672 SAS_DPRINTK("clearing nexus for port:%d\n",
674 res = i->dft->lldd_clear_nexus_port(port);
675 if (res == TMF_RESP_FUNC_COMPLETE) {
676 SAS_DPRINTK("clear nexus port:%d "
677 "succeeded\n", port->id);
678 sas_eh_finish_cmd(cmd);
679 sas_scsi_clear_queue_port(work_q,
684 if (i->dft->lldd_clear_nexus_ha) {
685 SAS_DPRINTK("clear nexus ha\n");
686 res = i->dft->lldd_clear_nexus_ha(ha);
687 if (res == TMF_RESP_FUNC_COMPLETE) {
688 SAS_DPRINTK("clear nexus ha "
690 sas_eh_finish_cmd(cmd);
694 /* If we are here -- this means that no amount
695 * of effort could recover from errors. Quite
696 * possibly the HA just disappeared.
698 SAS_DPRINTK("error from device %llx, LUN %llx "
699 "couldn't be recovered in any way\n",
700 SAS_ADDR(task->dev->sas_addr),
703 sas_eh_finish_cmd(cmd);
708 list_splice_tail(&done, work_q);
709 list_splice_tail_init(&ha->eh_ata_q, work_q);
713 SAS_DPRINTK("--- Exit %s -- clear_q\n", __func__);
714 list_for_each_entry_safe(cmd, n, work_q, eh_entry)
715 sas_eh_finish_cmd(cmd);
719 static void sas_eh_handle_resets(struct Scsi_Host *shost)
721 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
722 struct sas_internal *i = to_sas_internal(shost->transportt);
724 /* handle directed resets to sas devices */
725 spin_lock_irq(&ha->lock);
726 while (!list_empty(&ha->eh_dev_q)) {
727 struct domain_device *dev;
728 struct ssp_device *ssp;
730 ssp = list_entry(ha->eh_dev_q.next, typeof(*ssp), eh_list_node);
731 list_del_init(&ssp->eh_list_node);
732 dev = container_of(ssp, typeof(*dev), ssp_dev);
733 kref_get(&dev->kref);
734 WARN_ONCE(dev_is_sata(dev), "ssp reset to ata device?\n");
736 spin_unlock_irq(&ha->lock);
738 if (test_and_clear_bit(SAS_DEV_LU_RESET, &dev->state))
739 i->dft->lldd_lu_reset(dev, ssp->reset_lun.scsi_lun);
741 if (test_and_clear_bit(SAS_DEV_RESET, &dev->state))
742 i->dft->lldd_I_T_nexus_reset(dev);
745 spin_lock_irq(&ha->lock);
746 clear_bit(SAS_DEV_EH_PENDING, &dev->state);
749 spin_unlock_irq(&ha->lock);
753 void sas_scsi_recover_host(struct Scsi_Host *shost)
755 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
756 LIST_HEAD(eh_work_q);
763 spin_lock_irq(shost->host_lock);
764 list_splice_init(&shost->eh_cmd_q, &eh_work_q);
765 spin_unlock_irq(shost->host_lock);
767 SAS_DPRINTK("Enter %s busy: %d failed: %d\n",
768 __func__, atomic_read(&shost->host_busy), shost->host_failed);
770 * Deal with commands that still have SAS tasks (i.e. they didn't
771 * complete via the normal sas_task completion mechanism),
772 * SAS_HA_FROZEN gives eh dominion over all sas_task completion.
774 set_bit(SAS_HA_FROZEN, &ha->state);
775 sas_eh_handle_sas_errors(shost, &eh_work_q);
776 clear_bit(SAS_HA_FROZEN, &ha->state);
777 if (list_empty(&eh_work_q))
781 * Now deal with SCSI commands that completed ok but have a an error
782 * code (and hopefully sense data) attached. This is roughly what
783 * scsi_unjam_host does, but we skip scsi_eh_abort_cmds because any
784 * command we see here has no sas_task and is thus unknown to the HA.
786 sas_ata_eh(shost, &eh_work_q, &ha->eh_done_q);
787 if (!scsi_eh_get_sense(&eh_work_q, &ha->eh_done_q))
788 scsi_eh_ready_devs(shost, &eh_work_q, &ha->eh_done_q);
791 sas_eh_handle_resets(shost);
793 /* now link into libata eh --- if we have any ata devices */
794 sas_ata_strategy_handler(shost);
796 scsi_eh_flush_done_q(&ha->eh_done_q);
798 /* check if any new eh work was scheduled during the last run */
799 spin_lock_irq(&ha->lock);
800 if (ha->eh_active == 0) {
801 shost->host_eh_scheduled = 0;
804 spin_unlock_irq(&ha->lock);
809 SAS_DPRINTK("--- Exit %s: busy: %d failed: %d tries: %d\n",
810 __func__, atomic_read(&shost->host_busy),
811 shost->host_failed, tries);
814 int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
816 struct domain_device *dev = sdev_to_domain_dev(sdev);
818 if (dev_is_sata(dev))
819 return ata_sas_scsi_ioctl(dev->sata_dev.ap, sdev, cmd, arg);
824 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy)
826 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent);
827 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
828 struct domain_device *found_dev = NULL;
832 spin_lock_irqsave(&ha->phy_port_lock, flags);
833 for (i = 0; i < ha->num_phys; i++) {
834 struct asd_sas_port *port = ha->sas_port[i];
835 struct domain_device *dev;
837 spin_lock(&port->dev_list_lock);
838 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
839 if (rphy == dev->rphy) {
841 spin_unlock(&port->dev_list_lock);
845 spin_unlock(&port->dev_list_lock);
848 spin_unlock_irqrestore(&ha->phy_port_lock, flags);
853 int sas_target_alloc(struct scsi_target *starget)
855 struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent);
856 struct domain_device *found_dev = sas_find_dev_by_rphy(rphy);
861 kref_get(&found_dev->kref);
862 starget->hostdata = found_dev;
866 #define SAS_DEF_QD 256
868 int sas_slave_configure(struct scsi_device *scsi_dev)
870 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
872 BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE);
874 if (dev_is_sata(dev)) {
875 ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap);
879 sas_read_port_mode_page(scsi_dev);
881 if (scsi_dev->tagged_supported) {
882 scsi_change_queue_depth(scsi_dev, SAS_DEF_QD);
884 SAS_DPRINTK("device %llx, LUN %llx doesn't support "
885 "TCQ\n", SAS_ADDR(dev->sas_addr),
887 scsi_change_queue_depth(scsi_dev, 1);
890 scsi_dev->allow_restart = 1;
895 int sas_change_queue_depth(struct scsi_device *sdev, int depth)
897 struct domain_device *dev = sdev_to_domain_dev(sdev);
899 if (dev_is_sata(dev))
900 return __ata_change_queue_depth(dev->sata_dev.ap, sdev, depth);
902 if (!sdev->tagged_supported)
904 return scsi_change_queue_depth(sdev, depth);
907 int sas_bios_param(struct scsi_device *scsi_dev,
908 struct block_device *bdev,
909 sector_t capacity, int *hsc)
913 sector_div(capacity, 255*63);
920 * Tell an upper layer that it needs to initiate an abort for a given task.
921 * This should only ever be called by an LLDD.
923 void sas_task_abort(struct sas_task *task)
925 struct scsi_cmnd *sc = task->uldd_task;
927 /* Escape for libsas internal commands */
929 struct sas_task_slow *slow = task->slow_task;
933 if (!del_timer(&slow->timer))
935 slow->timer.function(&slow->timer);
939 if (dev_is_sata(task->dev)) {
940 sas_ata_task_abort(task);
942 struct request_queue *q = sc->device->request_queue;
945 spin_lock_irqsave(q->queue_lock, flags);
946 blk_abort_request(sc->request);
947 spin_unlock_irqrestore(q->queue_lock, flags);
951 void sas_target_destroy(struct scsi_target *starget)
953 struct domain_device *found_dev = starget->hostdata;
958 starget->hostdata = NULL;
959 sas_put_device(found_dev);
962 static void sas_parse_addr(u8 *sas_addr, const char *p)
965 for (i = 0; i < SAS_ADDR_SIZE; i++) {
969 h = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10;
971 l = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10;
973 sas_addr[i] = (h<<4) | l;
977 #define SAS_STRING_ADDR_SIZE 16
979 int sas_request_addr(struct Scsi_Host *shost, u8 *addr)
982 const struct firmware *fw;
984 res = request_firmware(&fw, "sas_addr", &shost->shost_gendev);
988 if (fw->size < SAS_STRING_ADDR_SIZE) {
993 sas_parse_addr(addr, fw->data);
996 release_firmware(fw);
999 EXPORT_SYMBOL_GPL(sas_request_addr);
1001 EXPORT_SYMBOL_GPL(sas_queuecommand);
1002 EXPORT_SYMBOL_GPL(sas_target_alloc);
1003 EXPORT_SYMBOL_GPL(sas_slave_configure);
1004 EXPORT_SYMBOL_GPL(sas_change_queue_depth);
1005 EXPORT_SYMBOL_GPL(sas_bios_param);
1006 EXPORT_SYMBOL_GPL(sas_task_abort);
1007 EXPORT_SYMBOL_GPL(sas_phy_reset);
1008 EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler);
1009 EXPORT_SYMBOL_GPL(sas_eh_target_reset_handler);
1010 EXPORT_SYMBOL_GPL(sas_target_destroy);
1011 EXPORT_SYMBOL_GPL(sas_ioctl);