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 "sas_internal.h"
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_device.h>
30 #include <scsi/scsi_tcq.h>
31 #include <scsi/scsi.h>
32 #include <scsi/scsi_eh.h>
33 #include <scsi/scsi_transport.h>
34 #include <scsi/scsi_transport_sas.h>
35 #include "../scsi_sas_internal.h"
36 #include "../scsi_transport_api.h"
38 #include <linux/err.h>
39 #include <linux/blkdev.h>
40 #include <linux/scatterlist.h>
42 /* ---------- SCSI Host glue ---------- */
44 #define TO_SAS_TASK(_scsi_cmd) ((void *)(_scsi_cmd)->host_scribble)
45 #define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
47 static void sas_scsi_task_done(struct sas_task
*task
)
49 struct task_status_struct
*ts
= &task
->task_status
;
50 struct scsi_cmnd
*sc
= task
->uldd_task
;
51 struct sas_ha_struct
*sas_ha
= SHOST_TO_SAS_HA(sc
->device
->host
);
52 unsigned ts_flags
= task
->task_state_flags
;
56 SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n");
57 list_del_init(&task
->list
);
62 if (ts
->resp
== SAS_TASK_UNDELIVERED
) {
65 } else { /* ts->resp == SAS_TASK_COMPLETE */
66 /* task delivered, what happened afterwards? */
68 case SAS_DEV_NO_RESPONSE
:
75 case SAS_DATA_UNDERRUN
:
76 sc
->resid
= ts
->residual
;
77 if (sc
->request_bufflen
- sc
->resid
< sc
->underflow
)
80 case SAS_DATA_OVERRUN
:
84 hs
= DID_SOFT_ERROR
; /* retry */
86 case SAS_DEVICE_UNKNOWN
:
93 if (ts
->open_rej_reason
== SAS_OREJ_RSVD_RETRY
)
94 hs
= DID_SOFT_ERROR
; /* retry */
98 case SAS_PROTO_RESPONSE
:
99 SAS_DPRINTK("LLDD:%s sent SAS_PROTO_RESP for an SSP "
100 "task; please report this\n",
101 task
->dev
->port
->ha
->sas_ha_name
);
103 case SAS_ABORTED_TASK
:
107 memcpy(sc
->sense_buffer
, ts
->buf
,
108 max(SCSI_SENSE_BUFFERSIZE
, ts
->buf_valid_size
));
109 stat
= SAM_CHECK_COND
;
116 ASSIGN_SAS_TASK(sc
, NULL
);
117 sc
->result
= (hs
<< 16) | stat
;
118 list_del_init(&task
->list
);
120 /* This is very ugly but this is how SCSI Core works. */
121 if (ts_flags
& SAS_TASK_STATE_ABORTED
)
122 scsi_eh_finish_cmd(sc
, &sas_ha
->eh_done_q
);
127 static enum task_attribute
sas_scsi_get_task_attr(struct scsi_cmnd
*cmd
)
129 enum task_attribute ta
= TASK_ATTR_SIMPLE
;
130 if (cmd
->request
&& blk_rq_tagged(cmd
->request
)) {
131 if (cmd
->device
->ordered_tags
&&
132 (cmd
->request
->cmd_flags
& REQ_HARDBARRIER
))
138 static struct sas_task
*sas_create_task(struct scsi_cmnd
*cmd
,
139 struct domain_device
*dev
,
142 struct sas_task
*task
= sas_alloc_task(gfp_flags
);
148 *(u32
*)cmd
->sense_buffer
= 0;
149 task
->uldd_task
= cmd
;
150 ASSIGN_SAS_TASK(cmd
, task
);
153 task
->task_proto
= task
->dev
->tproto
; /* BUG_ON(!SSP) */
155 task
->ssp_task
.retry_count
= 1;
156 int_to_scsilun(cmd
->device
->lun
, &lun
);
157 memcpy(task
->ssp_task
.LUN
, &lun
.scsi_lun
, 8);
158 task
->ssp_task
.task_attr
= sas_scsi_get_task_attr(cmd
);
159 memcpy(task
->ssp_task
.cdb
, cmd
->cmnd
, 16);
161 task
->scatter
= cmd
->request_buffer
;
162 task
->num_scatter
= cmd
->use_sg
;
163 task
->total_xfer_len
= cmd
->request_bufflen
;
164 task
->data_dir
= cmd
->sc_data_direction
;
166 task
->task_done
= sas_scsi_task_done
;
171 static int sas_queue_up(struct sas_task
*task
)
173 struct sas_ha_struct
*sas_ha
= task
->dev
->port
->ha
;
174 struct scsi_core
*core
= &sas_ha
->core
;
178 spin_lock_irqsave(&core
->task_queue_lock
, flags
);
179 if (sas_ha
->lldd_queue_size
< core
->task_queue_size
+ 1) {
180 spin_unlock_irqrestore(&core
->task_queue_lock
, flags
);
181 return -SAS_QUEUE_FULL
;
183 list_add_tail(&task
->list
, &core
->task_queue
);
184 core
->task_queue_size
+= 1;
185 spin_unlock_irqrestore(&core
->task_queue_lock
, flags
);
186 up(&core
->queue_thread_sema
);
192 * sas_queuecommand -- Enqueue a command for processing
193 * @parameters: See SCSI Core documentation
195 * Note: XXX: Remove the host unlock/lock pair when SCSI Core can
196 * call us without holding an IRQ spinlock...
198 int sas_queuecommand(struct scsi_cmnd
*cmd
,
199 void (*scsi_done
)(struct scsi_cmnd
*))
202 struct domain_device
*dev
= cmd_to_domain_dev(cmd
);
203 struct Scsi_Host
*host
= cmd
->device
->host
;
204 struct sas_internal
*i
= to_sas_internal(host
->transportt
);
206 spin_unlock_irq(host
->host_lock
);
209 struct sas_ha_struct
*sas_ha
= dev
->port
->ha
;
210 struct sas_task
*task
;
213 task
= sas_create_task(cmd
, dev
, GFP_ATOMIC
);
217 cmd
->scsi_done
= scsi_done
;
218 /* Queue up, Direct Mode or Task Collector Mode. */
219 if (sas_ha
->lldd_max_execute_num
< 2)
220 res
= i
->dft
->lldd_execute_task(task
, 1, GFP_ATOMIC
);
222 res
= sas_queue_up(task
);
226 SAS_DPRINTK("lldd_execute_task returned: %d\n", res
);
227 ASSIGN_SAS_TASK(cmd
, NULL
);
229 if (res
== -SAS_QUEUE_FULL
) {
230 cmd
->result
= DID_SOFT_ERROR
<< 16; /* retry */
238 spin_lock_irq(host
->host_lock
);
242 static void sas_scsi_clear_queue_lu(struct list_head
*error_q
, struct scsi_cmnd
*my_cmd
)
244 struct scsi_cmnd
*cmd
, *n
;
246 list_for_each_entry_safe(cmd
, n
, error_q
, eh_entry
) {
248 list_del_init(&cmd
->eh_entry
);
252 static void sas_scsi_clear_queue_I_T(struct list_head
*error_q
,
253 struct domain_device
*dev
)
255 struct scsi_cmnd
*cmd
, *n
;
257 list_for_each_entry_safe(cmd
, n
, error_q
, eh_entry
) {
258 struct domain_device
*x
= cmd_to_domain_dev(cmd
);
261 list_del_init(&cmd
->eh_entry
);
265 static void sas_scsi_clear_queue_port(struct list_head
*error_q
,
266 struct asd_sas_port
*port
)
268 struct scsi_cmnd
*cmd
, *n
;
270 list_for_each_entry_safe(cmd
, n
, error_q
, eh_entry
) {
271 struct domain_device
*dev
= cmd_to_domain_dev(cmd
);
272 struct asd_sas_port
*x
= dev
->port
;
275 list_del_init(&cmd
->eh_entry
);
279 enum task_disposition
{
286 static enum task_disposition
sas_scsi_find_task(struct sas_task
*task
)
288 struct sas_ha_struct
*ha
= task
->dev
->port
->ha
;
291 struct sas_internal
*si
=
292 to_sas_internal(task
->dev
->port
->ha
->core
.shost
->transportt
);
294 if (ha
->lldd_max_execute_num
> 1) {
295 struct scsi_core
*core
= &ha
->core
;
296 struct sas_task
*t
, *n
;
298 spin_lock_irqsave(&core
->task_queue_lock
, flags
);
299 list_for_each_entry_safe(t
, n
, &core
->task_queue
, list
) {
301 list_del_init(&t
->list
);
302 spin_unlock_irqrestore(&core
->task_queue_lock
,
304 SAS_DPRINTK("%s: task 0x%p aborted from "
307 return TASK_IS_ABORTED
;
310 spin_unlock_irqrestore(&core
->task_queue_lock
, flags
);
313 for (i
= 0; i
< 5; i
++) {
314 SAS_DPRINTK("%s: aborting task 0x%p\n", __FUNCTION__
, task
);
315 res
= si
->dft
->lldd_abort_task(task
);
317 spin_lock_irqsave(&task
->task_state_lock
, flags
);
318 if (task
->task_state_flags
& SAS_TASK_STATE_DONE
) {
319 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
320 SAS_DPRINTK("%s: task 0x%p is done\n", __FUNCTION__
,
324 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
326 if (res
== TMF_RESP_FUNC_COMPLETE
) {
327 SAS_DPRINTK("%s: task 0x%p is aborted\n",
329 return TASK_IS_ABORTED
;
330 } else if (si
->dft
->lldd_query_task
) {
331 SAS_DPRINTK("%s: querying task 0x%p\n",
333 res
= si
->dft
->lldd_query_task(task
);
334 if (res
== TMF_RESP_FUNC_SUCC
) {
335 SAS_DPRINTK("%s: task 0x%p at LU\n",
337 return TASK_IS_AT_LU
;
338 } else if (res
== TMF_RESP_FUNC_COMPLETE
) {
339 SAS_DPRINTK("%s: task 0x%p not at LU\n",
341 return TASK_IS_NOT_AT_LU
;
348 static int sas_recover_lu(struct domain_device
*dev
, struct scsi_cmnd
*cmd
)
350 int res
= TMF_RESP_FUNC_FAILED
;
352 struct sas_internal
*i
=
353 to_sas_internal(dev
->port
->ha
->core
.shost
->transportt
);
355 int_to_scsilun(cmd
->device
->lun
, &lun
);
357 SAS_DPRINTK("eh: device %llx LUN %x has the task\n",
358 SAS_ADDR(dev
->sas_addr
),
361 if (i
->dft
->lldd_abort_task_set
)
362 res
= i
->dft
->lldd_abort_task_set(dev
, lun
.scsi_lun
);
364 if (res
== TMF_RESP_FUNC_FAILED
) {
365 if (i
->dft
->lldd_clear_task_set
)
366 res
= i
->dft
->lldd_clear_task_set(dev
, lun
.scsi_lun
);
369 if (res
== TMF_RESP_FUNC_FAILED
) {
370 if (i
->dft
->lldd_lu_reset
)
371 res
= i
->dft
->lldd_lu_reset(dev
, lun
.scsi_lun
);
377 static int sas_recover_I_T(struct domain_device
*dev
)
379 int res
= TMF_RESP_FUNC_FAILED
;
380 struct sas_internal
*i
=
381 to_sas_internal(dev
->port
->ha
->core
.shost
->transportt
);
383 SAS_DPRINTK("I_T nexus reset for dev %016llx\n",
384 SAS_ADDR(dev
->sas_addr
));
386 if (i
->dft
->lldd_I_T_nexus_reset
)
387 res
= i
->dft
->lldd_I_T_nexus_reset(dev
);
392 void sas_scsi_recover_host(struct Scsi_Host
*shost
)
394 struct sas_ha_struct
*ha
= SHOST_TO_SAS_HA(shost
);
397 struct scsi_cmnd
*cmd
, *n
;
398 enum task_disposition res
= TASK_IS_DONE
;
400 struct sas_internal
*i
= to_sas_internal(shost
->transportt
);
402 spin_lock_irqsave(shost
->host_lock
, flags
);
403 list_splice_init(&shost
->eh_cmd_q
, &error_q
);
404 spin_unlock_irqrestore(shost
->host_lock
, flags
);
406 SAS_DPRINTK("Enter %s\n", __FUNCTION__
);
408 /* All tasks on this list were marked SAS_TASK_STATE_ABORTED
409 * by sas_scsi_timed_out() callback.
412 SAS_DPRINTK("going over list...\n");
413 list_for_each_entry_safe(cmd
, n
, &error_q
, eh_entry
) {
414 struct sas_task
*task
= TO_SAS_TASK(cmd
);
415 list_del_init(&cmd
->eh_entry
);
418 SAS_DPRINTK("%s: taskless cmd?!\n", __FUNCTION__
);
421 SAS_DPRINTK("trying to find task 0x%p\n", task
);
422 res
= sas_scsi_find_task(task
);
428 SAS_DPRINTK("%s: task 0x%p is done\n", __FUNCTION__
,
430 task
->task_done(task
);
432 case TASK_IS_ABORTED
:
433 SAS_DPRINTK("%s: task 0x%p is aborted\n",
435 task
->task_done(task
);
438 SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task
);
439 tmf_resp
= sas_recover_lu(task
->dev
, cmd
);
440 if (tmf_resp
== TMF_RESP_FUNC_COMPLETE
) {
441 SAS_DPRINTK("dev %016llx LU %x is "
445 task
->task_done(task
);
446 sas_scsi_clear_queue_lu(&error_q
, cmd
);
450 case TASK_IS_NOT_AT_LU
:
451 SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n",
453 tmf_resp
= sas_recover_I_T(task
->dev
);
454 if (tmf_resp
== TMF_RESP_FUNC_COMPLETE
) {
455 SAS_DPRINTK("I_T %016llx recovered\n",
456 SAS_ADDR(task
->dev
->sas_addr
));
457 task
->task_done(task
);
458 sas_scsi_clear_queue_I_T(&error_q
, task
->dev
);
461 /* Hammer time :-) */
462 if (i
->dft
->lldd_clear_nexus_port
) {
463 struct asd_sas_port
*port
= task
->dev
->port
;
464 SAS_DPRINTK("clearing nexus for port:%d\n",
466 res
= i
->dft
->lldd_clear_nexus_port(port
);
467 if (res
== TMF_RESP_FUNC_COMPLETE
) {
468 SAS_DPRINTK("clear nexus port:%d "
469 "succeeded\n", port
->id
);
470 task
->task_done(task
);
471 sas_scsi_clear_queue_port(&error_q
,
476 if (i
->dft
->lldd_clear_nexus_ha
) {
477 SAS_DPRINTK("clear nexus ha\n");
478 res
= i
->dft
->lldd_clear_nexus_ha(ha
);
479 if (res
== TMF_RESP_FUNC_COMPLETE
) {
480 SAS_DPRINTK("clear nexus ha "
482 task
->task_done(task
);
486 /* If we are here -- this means that no amount
487 * of effort could recover from errors. Quite
488 * possibly the HA just disappeared.
490 SAS_DPRINTK("error from device %llx, LUN %x "
491 "couldn't be recovered in any way\n",
492 SAS_ADDR(task
->dev
->sas_addr
),
495 task
->task_done(task
);
500 scsi_eh_flush_done_q(&ha
->eh_done_q
);
501 SAS_DPRINTK("--- Exit %s\n", __FUNCTION__
);
504 SAS_DPRINTK("--- Exit %s -- clear_q\n", __FUNCTION__
);
505 list_for_each_entry_safe(cmd
, n
, &error_q
, eh_entry
) {
506 struct sas_task
*task
= TO_SAS_TASK(cmd
);
507 list_del_init(&cmd
->eh_entry
);
508 task
->task_done(task
);
512 enum scsi_eh_timer_return
sas_scsi_timed_out(struct scsi_cmnd
*cmd
)
514 struct sas_task
*task
= TO_SAS_TASK(cmd
);
518 cmd
->timeout_per_command
/= 2;
519 SAS_DPRINTK("command 0x%p, task 0x%p, gone: %s\n",
520 cmd
, task
, (cmd
->timeout_per_command
?
521 "EH_RESET_TIMER" : "EH_NOT_HANDLED"));
522 if (!cmd
->timeout_per_command
)
523 return EH_NOT_HANDLED
;
524 return EH_RESET_TIMER
;
527 spin_lock_irqsave(&task
->task_state_lock
, flags
);
528 if (task
->task_state_flags
& SAS_TASK_STATE_DONE
) {
529 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
530 SAS_DPRINTK("command 0x%p, task 0x%p, timed out: EH_HANDLED\n",
534 if (!(task
->task_state_flags
& SAS_TASK_AT_INITIATOR
)) {
535 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
536 SAS_DPRINTK("command 0x%p, task 0x%p, not at initiator: "
539 return EH_RESET_TIMER
;
541 task
->task_state_flags
|= SAS_TASK_STATE_ABORTED
;
542 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
544 SAS_DPRINTK("command 0x%p, task 0x%p, timed out: EH_NOT_HANDLED\n",
547 return EH_NOT_HANDLED
;
550 struct domain_device
*sas_find_dev_by_rphy(struct sas_rphy
*rphy
)
552 struct Scsi_Host
*shost
= dev_to_shost(rphy
->dev
.parent
);
553 struct sas_ha_struct
*ha
= SHOST_TO_SAS_HA(shost
);
554 struct domain_device
*found_dev
= NULL
;
557 spin_lock(&ha
->phy_port_lock
);
558 for (i
= 0; i
< ha
->num_phys
; i
++) {
559 struct asd_sas_port
*port
= ha
->sas_port
[i
];
560 struct domain_device
*dev
;
562 spin_lock(&port
->dev_list_lock
);
563 list_for_each_entry(dev
, &port
->dev_list
, dev_list_node
) {
564 if (rphy
== dev
->rphy
) {
566 spin_unlock(&port
->dev_list_lock
);
570 spin_unlock(&port
->dev_list_lock
);
573 spin_unlock(&ha
->phy_port_lock
);
578 static inline struct domain_device
*sas_find_target(struct scsi_target
*starget
)
580 struct sas_rphy
*rphy
= dev_to_rphy(starget
->dev
.parent
);
582 return sas_find_dev_by_rphy(rphy
);
585 int sas_target_alloc(struct scsi_target
*starget
)
587 struct domain_device
*found_dev
= sas_find_target(starget
);
592 starget
->hostdata
= found_dev
;
596 #define SAS_DEF_QD 32
597 #define SAS_MAX_QD 64
599 int sas_slave_configure(struct scsi_device
*scsi_dev
)
601 struct domain_device
*dev
= sdev_to_domain_dev(scsi_dev
);
602 struct sas_ha_struct
*sas_ha
;
604 BUG_ON(dev
->rphy
->identify
.device_type
!= SAS_END_DEVICE
);
606 sas_ha
= dev
->port
->ha
;
608 sas_read_port_mode_page(scsi_dev
);
610 if (scsi_dev
->tagged_supported
) {
611 scsi_set_tag_type(scsi_dev
, MSG_SIMPLE_TAG
);
612 scsi_activate_tcq(scsi_dev
, SAS_DEF_QD
);
614 SAS_DPRINTK("device %llx, LUN %x doesn't support "
615 "TCQ\n", SAS_ADDR(dev
->sas_addr
),
617 scsi_dev
->tagged_supported
= 0;
618 scsi_set_tag_type(scsi_dev
, 0);
619 scsi_deactivate_tcq(scsi_dev
, 1);
625 void sas_slave_destroy(struct scsi_device
*scsi_dev
)
629 int sas_change_queue_depth(struct scsi_device
*scsi_dev
, int new_depth
)
631 int res
= min(new_depth
, SAS_MAX_QD
);
633 if (scsi_dev
->tagged_supported
)
634 scsi_adjust_queue_depth(scsi_dev
, scsi_get_tag_type(scsi_dev
),
637 struct domain_device
*dev
= sdev_to_domain_dev(scsi_dev
);
638 sas_printk("device %llx LUN %x queue depth changed to 1\n",
639 SAS_ADDR(dev
->sas_addr
),
641 scsi_adjust_queue_depth(scsi_dev
, 0, 1);
648 int sas_change_queue_type(struct scsi_device
*scsi_dev
, int qt
)
650 if (!scsi_dev
->tagged_supported
)
653 scsi_deactivate_tcq(scsi_dev
, 1);
655 scsi_set_tag_type(scsi_dev
, qt
);
656 scsi_activate_tcq(scsi_dev
, scsi_dev
->queue_depth
);
661 int sas_bios_param(struct scsi_device
*scsi_dev
,
662 struct block_device
*bdev
,
663 sector_t capacity
, int *hsc
)
667 sector_div(capacity
, 255*63);
673 /* ---------- Task Collector Thread implementation ---------- */
675 static void sas_queue(struct sas_ha_struct
*sas_ha
)
677 struct scsi_core
*core
= &sas_ha
->core
;
682 struct sas_internal
*i
= to_sas_internal(core
->shost
->transportt
);
684 spin_lock_irqsave(&core
->task_queue_lock
, flags
);
685 while (!core
->queue_thread_kill
&&
686 !list_empty(&core
->task_queue
)) {
688 can_queue
= sas_ha
->lldd_queue_size
- core
->task_queue_size
;
689 if (can_queue
>= 0) {
690 can_queue
= core
->task_queue_size
;
691 list_splice_init(&core
->task_queue
, &q
);
693 struct list_head
*a
, *n
;
695 can_queue
= sas_ha
->lldd_queue_size
;
696 list_for_each_safe(a
, n
, &core
->task_queue
) {
697 list_move_tail(a
, &q
);
698 if (--can_queue
== 0)
701 can_queue
= sas_ha
->lldd_queue_size
;
703 core
->task_queue_size
-= can_queue
;
704 spin_unlock_irqrestore(&core
->task_queue_lock
, flags
);
706 struct sas_task
*task
= list_entry(q
.next
,
710 res
= i
->dft
->lldd_execute_task(task
, can_queue
,
713 __list_add(&q
, task
->list
.prev
, &task
->list
);
715 spin_lock_irqsave(&core
->task_queue_lock
, flags
);
717 list_splice_init(&q
, &core
->task_queue
); /*at head*/
718 core
->task_queue_size
+= can_queue
;
721 spin_unlock_irqrestore(&core
->task_queue_lock
, flags
);
724 static DECLARE_COMPLETION(queue_th_comp
);
727 * sas_queue_thread -- The Task Collector thread
728 * @_sas_ha: pointer to struct sas_ha
730 static int sas_queue_thread(void *_sas_ha
)
732 struct sas_ha_struct
*sas_ha
= _sas_ha
;
733 struct scsi_core
*core
= &sas_ha
->core
;
735 daemonize("sas_queue_%d", core
->shost
->host_no
);
736 current
->flags
|= PF_NOFREEZE
;
738 complete(&queue_th_comp
);
741 down_interruptible(&core
->queue_thread_sema
);
743 if (core
->queue_thread_kill
)
747 complete(&queue_th_comp
);
752 int sas_init_queue(struct sas_ha_struct
*sas_ha
)
755 struct scsi_core
*core
= &sas_ha
->core
;
757 spin_lock_init(&core
->task_queue_lock
);
758 core
->task_queue_size
= 0;
759 INIT_LIST_HEAD(&core
->task_queue
);
760 init_MUTEX_LOCKED(&core
->queue_thread_sema
);
762 res
= kernel_thread(sas_queue_thread
, sas_ha
, 0);
764 wait_for_completion(&queue_th_comp
);
766 return res
< 0 ? res
: 0;
769 void sas_shutdown_queue(struct sas_ha_struct
*sas_ha
)
772 struct scsi_core
*core
= &sas_ha
->core
;
773 struct sas_task
*task
, *n
;
775 init_completion(&queue_th_comp
);
776 core
->queue_thread_kill
= 1;
777 up(&core
->queue_thread_sema
);
778 wait_for_completion(&queue_th_comp
);
780 if (!list_empty(&core
->task_queue
))
781 SAS_DPRINTK("HA: %llx: scsi core task queue is NOT empty!?\n",
782 SAS_ADDR(sas_ha
->sas_addr
));
784 spin_lock_irqsave(&core
->task_queue_lock
, flags
);
785 list_for_each_entry_safe(task
, n
, &core
->task_queue
, list
) {
786 struct scsi_cmnd
*cmd
= task
->uldd_task
;
788 list_del_init(&task
->list
);
790 ASSIGN_SAS_TASK(cmd
, NULL
);
792 cmd
->result
= DID_ABORT
<< 16;
795 spin_unlock_irqrestore(&core
->task_queue_lock
, flags
);
798 static int do_sas_task_abort(struct sas_task
*task
)
800 struct scsi_cmnd
*sc
= task
->uldd_task
;
801 struct sas_internal
*si
=
802 to_sas_internal(task
->dev
->port
->ha
->core
.shost
->transportt
);
806 spin_lock_irqsave(&task
->task_state_lock
, flags
);
807 if (task
->task_state_flags
& SAS_TASK_STATE_ABORTED
) {
808 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
809 SAS_DPRINTK("%s: Task %p already aborted.\n", __FUNCTION__
,
814 if (!(task
->task_state_flags
& SAS_TASK_STATE_DONE
))
815 task
->task_state_flags
|= SAS_TASK_STATE_ABORTED
;
816 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
818 if (!si
->dft
->lldd_abort_task
)
821 res
= si
->dft
->lldd_abort_task(task
);
822 if ((task
->task_state_flags
& SAS_TASK_STATE_DONE
) ||
823 (res
== TMF_RESP_FUNC_COMPLETE
))
825 /* SMP commands don't have scsi_cmds(?) */
827 task
->task_done(task
);
830 scsi_req_abort_cmd(sc
);
831 scsi_schedule_eh(sc
->device
->host
);
835 spin_lock_irqsave(&task
->task_state_lock
, flags
);
836 if (!(task
->task_state_flags
& SAS_TASK_STATE_DONE
))
837 task
->task_state_flags
&= ~SAS_TASK_STATE_ABORTED
;
838 spin_unlock_irqrestore(&task
->task_state_lock
, flags
);
843 void sas_task_abort(struct work_struct
*work
)
845 struct sas_task
*task
=
846 container_of(work
, struct sas_task
, abort_work
);
849 for (i
= 0; i
< 5; i
++)
850 if (!do_sas_task_abort(task
))
853 SAS_DPRINTK("%s: Could not kill task!\n", __FUNCTION__
);
856 EXPORT_SYMBOL_GPL(sas_queuecommand
);
857 EXPORT_SYMBOL_GPL(sas_target_alloc
);
858 EXPORT_SYMBOL_GPL(sas_slave_configure
);
859 EXPORT_SYMBOL_GPL(sas_slave_destroy
);
860 EXPORT_SYMBOL_GPL(sas_change_queue_depth
);
861 EXPORT_SYMBOL_GPL(sas_change_queue_type
);
862 EXPORT_SYMBOL_GPL(sas_bios_param
);
863 EXPORT_SYMBOL_GPL(sas_task_abort
);
864 EXPORT_SYMBOL_GPL(sas_phy_reset
);
865 EXPORT_SYMBOL_GPL(sas_phy_enable
);