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
)
490 struct sas_task
*task
= TO_SAS_TASK(cmd
);
491 struct Scsi_Host
*host
= cmd
->device
->host
;
492 struct sas_internal
*i
= to_sas_internal(host
->transportt
);
494 if (!i
->dft
->lldd_abort_task
)
497 res
= i
->dft
->lldd_abort_task(task
);
498 if (res
== TMF_RESP_FUNC_SUCC
|| res
== TMF_RESP_FUNC_COMPLETE
)
503 EXPORT_SYMBOL_GPL(sas_eh_abort_handler
);
505 /* Attempt to send a LUN reset message to a device */
506 int sas_eh_device_reset_handler(struct scsi_cmnd
*cmd
)
510 struct Scsi_Host
*host
= cmd
->device
->host
;
511 struct domain_device
*dev
= cmd_to_domain_dev(cmd
);
512 struct sas_internal
*i
= to_sas_internal(host
->transportt
);
514 if (current
!= host
->ehandler
)
515 return sas_queue_reset(dev
, SAS_DEV_LU_RESET
, cmd
->device
->lun
, 0);
517 int_to_scsilun(cmd
->device
->lun
, &lun
);
519 if (!i
->dft
->lldd_lu_reset
)
522 res
= i
->dft
->lldd_lu_reset(dev
, lun
.scsi_lun
);
523 if (res
== TMF_RESP_FUNC_SUCC
|| res
== TMF_RESP_FUNC_COMPLETE
)
529 int sas_eh_target_reset_handler(struct scsi_cmnd
*cmd
)
532 struct Scsi_Host
*host
= cmd
->device
->host
;
533 struct domain_device
*dev
= cmd_to_domain_dev(cmd
);
534 struct sas_internal
*i
= to_sas_internal(host
->transportt
);
536 if (current
!= host
->ehandler
)
537 return sas_queue_reset(dev
, SAS_DEV_RESET
, 0, 0);
539 if (!i
->dft
->lldd_I_T_nexus_reset
)
542 res
= i
->dft
->lldd_I_T_nexus_reset(dev
);
543 if (res
== TMF_RESP_FUNC_SUCC
|| res
== TMF_RESP_FUNC_COMPLETE
||
550 /* Try to reset a device */
551 static int try_to_reset_cmd_device(struct scsi_cmnd
*cmd
)
554 struct Scsi_Host
*shost
= cmd
->device
->host
;
556 if (!shost
->hostt
->eh_device_reset_handler
)
557 goto try_target_reset
;
559 res
= shost
->hostt
->eh_device_reset_handler(cmd
);
564 if (shost
->hostt
->eh_target_reset_handler
)
565 return shost
->hostt
->eh_target_reset_handler(cmd
);
570 static void sas_eh_handle_sas_errors(struct Scsi_Host
*shost
, struct list_head
*work_q
)
572 struct scsi_cmnd
*cmd
, *n
;
573 enum task_disposition res
= TASK_IS_DONE
;
574 int tmf_resp
, need_reset
;
575 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
577 struct sas_ha_struct
*ha
= SHOST_TO_SAS_HA(shost
);
580 /* clean out any commands that won the completion vs eh race */
581 list_for_each_entry_safe(cmd
, n
, work_q
, eh_entry
) {
582 struct domain_device
*dev
= cmd_to_domain_dev(cmd
);
583 struct sas_task
*task
;
585 spin_lock_irqsave(&dev
->done_lock
, flags
);
586 /* by this point the lldd has either observed
587 * SAS_HA_FROZEN and is leaving the task alone, or has
588 * won the race with eh and decided to complete it
590 task
= TO_SAS_TASK(cmd
);
591 spin_unlock_irqrestore(&dev
->done_lock
, flags
);
594 list_move_tail(&cmd
->eh_entry
, &done
);
598 list_for_each_entry_safe(cmd
, n
, work_q
, eh_entry
) {
599 struct sas_task
*task
= TO_SAS_TASK(cmd
);
601 list_del_init(&cmd
->eh_entry
);
603 spin_lock_irqsave(&task
->task_state_lock
, flags
);
604 need_reset
= task
->task_state_flags
& SAS_TASK_NEED_DEV_RESET
;
605 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
608 SAS_DPRINTK("%s: task 0x%p requests reset\n",
613 SAS_DPRINTK("trying to find task 0x%p\n", task
);
614 res
= sas_scsi_find_task(task
);
618 SAS_DPRINTK("%s: task 0x%p is done\n", __func__
,
620 sas_eh_defer_cmd(cmd
);
622 case TASK_IS_ABORTED
:
623 SAS_DPRINTK("%s: task 0x%p is aborted\n",
625 sas_eh_defer_cmd(cmd
);
628 SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task
);
630 tmf_resp
= sas_recover_lu(task
->dev
, cmd
);
631 if (tmf_resp
== TMF_RESP_FUNC_COMPLETE
) {
632 SAS_DPRINTK("dev %016llx LU %llx is "
636 sas_eh_defer_cmd(cmd
);
637 sas_scsi_clear_queue_lu(work_q
, cmd
);
641 case TASK_IS_NOT_AT_LU
:
642 case TASK_ABORT_FAILED
:
643 SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n",
645 tmf_resp
= sas_recover_I_T(task
->dev
);
646 if (tmf_resp
== TMF_RESP_FUNC_COMPLETE
||
647 tmf_resp
== -ENODEV
) {
648 struct domain_device
*dev
= task
->dev
;
649 SAS_DPRINTK("I_T %016llx recovered\n",
650 SAS_ADDR(task
->dev
->sas_addr
));
651 sas_eh_finish_cmd(cmd
);
652 sas_scsi_clear_queue_I_T(work_q
, dev
);
655 /* Hammer time :-) */
656 try_to_reset_cmd_device(cmd
);
657 if (i
->dft
->lldd_clear_nexus_port
) {
658 struct asd_sas_port
*port
= task
->dev
->port
;
659 SAS_DPRINTK("clearing nexus for port:%d\n",
661 res
= i
->dft
->lldd_clear_nexus_port(port
);
662 if (res
== TMF_RESP_FUNC_COMPLETE
) {
663 SAS_DPRINTK("clear nexus port:%d "
664 "succeeded\n", port
->id
);
665 sas_eh_finish_cmd(cmd
);
666 sas_scsi_clear_queue_port(work_q
,
671 if (i
->dft
->lldd_clear_nexus_ha
) {
672 SAS_DPRINTK("clear nexus ha\n");
673 res
= i
->dft
->lldd_clear_nexus_ha(ha
);
674 if (res
== TMF_RESP_FUNC_COMPLETE
) {
675 SAS_DPRINTK("clear nexus ha "
677 sas_eh_finish_cmd(cmd
);
681 /* If we are here -- this means that no amount
682 * of effort could recover from errors. Quite
683 * possibly the HA just disappeared.
685 SAS_DPRINTK("error from device %llx, LUN %llx "
686 "couldn't be recovered in any way\n",
687 SAS_ADDR(task
->dev
->sas_addr
),
690 sas_eh_finish_cmd(cmd
);
695 list_splice_tail(&done
, work_q
);
696 list_splice_tail_init(&ha
->eh_ata_q
, work_q
);
700 SAS_DPRINTK("--- Exit %s -- clear_q\n", __func__
);
701 list_for_each_entry_safe(cmd
, n
, work_q
, eh_entry
)
702 sas_eh_finish_cmd(cmd
);
706 static void sas_eh_handle_resets(struct Scsi_Host
*shost
)
708 struct sas_ha_struct
*ha
= SHOST_TO_SAS_HA(shost
);
709 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
711 /* handle directed resets to sas devices */
712 spin_lock_irq(&ha
->lock
);
713 while (!list_empty(&ha
->eh_dev_q
)) {
714 struct domain_device
*dev
;
715 struct ssp_device
*ssp
;
717 ssp
= list_entry(ha
->eh_dev_q
.next
, typeof(*ssp
), eh_list_node
);
718 list_del_init(&ssp
->eh_list_node
);
719 dev
= container_of(ssp
, typeof(*dev
), ssp_dev
);
720 kref_get(&dev
->kref
);
721 WARN_ONCE(dev_is_sata(dev
), "ssp reset to ata device?\n");
723 spin_unlock_irq(&ha
->lock
);
725 if (test_and_clear_bit(SAS_DEV_LU_RESET
, &dev
->state
))
726 i
->dft
->lldd_lu_reset(dev
, ssp
->reset_lun
.scsi_lun
);
728 if (test_and_clear_bit(SAS_DEV_RESET
, &dev
->state
))
729 i
->dft
->lldd_I_T_nexus_reset(dev
);
732 spin_lock_irq(&ha
->lock
);
733 clear_bit(SAS_DEV_EH_PENDING
, &dev
->state
);
736 spin_unlock_irq(&ha
->lock
);
740 void sas_scsi_recover_host(struct Scsi_Host
*shost
)
742 struct sas_ha_struct
*ha
= SHOST_TO_SAS_HA(shost
);
743 LIST_HEAD(eh_work_q
);
750 spin_lock_irq(shost
->host_lock
);
751 list_splice_init(&shost
->eh_cmd_q
, &eh_work_q
);
752 spin_unlock_irq(shost
->host_lock
);
754 SAS_DPRINTK("Enter %s busy: %d failed: %d\n",
755 __func__
, atomic_read(&shost
->host_busy
), shost
->host_failed
);
757 * Deal with commands that still have SAS tasks (i.e. they didn't
758 * complete via the normal sas_task completion mechanism),
759 * SAS_HA_FROZEN gives eh dominion over all sas_task completion.
761 set_bit(SAS_HA_FROZEN
, &ha
->state
);
762 sas_eh_handle_sas_errors(shost
, &eh_work_q
);
763 clear_bit(SAS_HA_FROZEN
, &ha
->state
);
764 if (list_empty(&eh_work_q
))
768 * Now deal with SCSI commands that completed ok but have a an error
769 * code (and hopefully sense data) attached. This is roughly what
770 * scsi_unjam_host does, but we skip scsi_eh_abort_cmds because any
771 * command we see here has no sas_task and is thus unknown to the HA.
773 sas_ata_eh(shost
, &eh_work_q
, &ha
->eh_done_q
);
774 if (!scsi_eh_get_sense(&eh_work_q
, &ha
->eh_done_q
))
775 scsi_eh_ready_devs(shost
, &eh_work_q
, &ha
->eh_done_q
);
778 sas_eh_handle_resets(shost
);
780 /* now link into libata eh --- if we have any ata devices */
781 sas_ata_strategy_handler(shost
);
783 scsi_eh_flush_done_q(&ha
->eh_done_q
);
785 /* check if any new eh work was scheduled during the last run */
786 spin_lock_irq(&ha
->lock
);
787 if (ha
->eh_active
== 0) {
788 shost
->host_eh_scheduled
= 0;
791 spin_unlock_irq(&ha
->lock
);
796 SAS_DPRINTK("--- Exit %s: busy: %d failed: %d tries: %d\n",
797 __func__
, atomic_read(&shost
->host_busy
),
798 shost
->host_failed
, tries
);
801 int sas_ioctl(struct scsi_device
*sdev
, int cmd
, void __user
*arg
)
803 struct domain_device
*dev
= sdev_to_domain_dev(sdev
);
805 if (dev_is_sata(dev
))
806 return ata_sas_scsi_ioctl(dev
->sata_dev
.ap
, sdev
, cmd
, arg
);
811 struct domain_device
*sas_find_dev_by_rphy(struct sas_rphy
*rphy
)
813 struct Scsi_Host
*shost
= dev_to_shost(rphy
->dev
.parent
);
814 struct sas_ha_struct
*ha
= SHOST_TO_SAS_HA(shost
);
815 struct domain_device
*found_dev
= NULL
;
819 spin_lock_irqsave(&ha
->phy_port_lock
, flags
);
820 for (i
= 0; i
< ha
->num_phys
; i
++) {
821 struct asd_sas_port
*port
= ha
->sas_port
[i
];
822 struct domain_device
*dev
;
824 spin_lock(&port
->dev_list_lock
);
825 list_for_each_entry(dev
, &port
->dev_list
, dev_list_node
) {
826 if (rphy
== dev
->rphy
) {
828 spin_unlock(&port
->dev_list_lock
);
832 spin_unlock(&port
->dev_list_lock
);
835 spin_unlock_irqrestore(&ha
->phy_port_lock
, flags
);
840 int sas_target_alloc(struct scsi_target
*starget
)
842 struct sas_rphy
*rphy
= dev_to_rphy(starget
->dev
.parent
);
843 struct domain_device
*found_dev
= sas_find_dev_by_rphy(rphy
);
848 kref_get(&found_dev
->kref
);
849 starget
->hostdata
= found_dev
;
853 #define SAS_DEF_QD 256
855 int sas_slave_configure(struct scsi_device
*scsi_dev
)
857 struct domain_device
*dev
= sdev_to_domain_dev(scsi_dev
);
859 BUG_ON(dev
->rphy
->identify
.device_type
!= SAS_END_DEVICE
);
861 if (dev_is_sata(dev
)) {
862 ata_sas_slave_configure(scsi_dev
, dev
->sata_dev
.ap
);
866 sas_read_port_mode_page(scsi_dev
);
868 if (scsi_dev
->tagged_supported
) {
869 scsi_change_queue_depth(scsi_dev
, SAS_DEF_QD
);
871 SAS_DPRINTK("device %llx, LUN %llx doesn't support "
872 "TCQ\n", SAS_ADDR(dev
->sas_addr
),
874 scsi_change_queue_depth(scsi_dev
, 1);
877 scsi_dev
->allow_restart
= 1;
882 int sas_change_queue_depth(struct scsi_device
*sdev
, int depth
)
884 struct domain_device
*dev
= sdev_to_domain_dev(sdev
);
886 if (dev_is_sata(dev
))
887 return __ata_change_queue_depth(dev
->sata_dev
.ap
, sdev
, depth
);
889 if (!sdev
->tagged_supported
)
891 return scsi_change_queue_depth(sdev
, depth
);
894 int sas_bios_param(struct scsi_device
*scsi_dev
,
895 struct block_device
*bdev
,
896 sector_t capacity
, int *hsc
)
900 sector_div(capacity
, 255*63);
907 * Tell an upper layer that it needs to initiate an abort for a given task.
908 * This should only ever be called by an LLDD.
910 void sas_task_abort(struct sas_task
*task
)
912 struct scsi_cmnd
*sc
= task
->uldd_task
;
914 /* Escape for libsas internal commands */
916 struct sas_task_slow
*slow
= task
->slow_task
;
920 if (!del_timer(&slow
->timer
))
922 slow
->timer
.function((TIMER_DATA_TYPE
)&slow
->timer
);
926 if (dev_is_sata(task
->dev
)) {
927 sas_ata_task_abort(task
);
929 struct request_queue
*q
= sc
->device
->request_queue
;
932 spin_lock_irqsave(q
->queue_lock
, flags
);
933 blk_abort_request(sc
->request
);
934 spin_unlock_irqrestore(q
->queue_lock
, flags
);
938 void sas_target_destroy(struct scsi_target
*starget
)
940 struct domain_device
*found_dev
= starget
->hostdata
;
945 starget
->hostdata
= NULL
;
946 sas_put_device(found_dev
);
949 static void sas_parse_addr(u8
*sas_addr
, const char *p
)
952 for (i
= 0; i
< SAS_ADDR_SIZE
; i
++) {
956 h
= isdigit(*p
) ? *p
-'0' : toupper(*p
)-'A'+10;
958 l
= isdigit(*p
) ? *p
-'0' : toupper(*p
)-'A'+10;
960 sas_addr
[i
] = (h
<<4) | l
;
964 #define SAS_STRING_ADDR_SIZE 16
966 int sas_request_addr(struct Scsi_Host
*shost
, u8
*addr
)
969 const struct firmware
*fw
;
971 res
= request_firmware(&fw
, "sas_addr", &shost
->shost_gendev
);
975 if (fw
->size
< SAS_STRING_ADDR_SIZE
) {
980 sas_parse_addr(addr
, fw
->data
);
983 release_firmware(fw
);
986 EXPORT_SYMBOL_GPL(sas_request_addr
);
988 EXPORT_SYMBOL_GPL(sas_queuecommand
);
989 EXPORT_SYMBOL_GPL(sas_target_alloc
);
990 EXPORT_SYMBOL_GPL(sas_slave_configure
);
991 EXPORT_SYMBOL_GPL(sas_change_queue_depth
);
992 EXPORT_SYMBOL_GPL(sas_bios_param
);
993 EXPORT_SYMBOL_GPL(sas_task_abort
);
994 EXPORT_SYMBOL_GPL(sas_phy_reset
);
995 EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler
);
996 EXPORT_SYMBOL_GPL(sas_eh_target_reset_handler
);
997 EXPORT_SYMBOL_GPL(sas_target_destroy
);
998 EXPORT_SYMBOL_GPL(sas_ioctl
);