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 static int eh_reset_phy_helper(struct sas_phy *phy)
396 tmf_resp = sas_phy_reset(phy, 1);
398 SAS_DPRINTK("Hard reset of phy %d failed 0x%x\n",
399 phy->identify.phy_identifier,
405 void sas_scsi_recover_host(struct Scsi_Host *shost)
407 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
410 struct scsi_cmnd *cmd, *n;
411 enum task_disposition res = TASK_IS_DONE;
412 int tmf_resp, need_reset;
413 struct sas_internal *i = to_sas_internal(shost->transportt);
414 struct sas_phy *task_sas_phy = NULL;
416 spin_lock_irqsave(shost->host_lock, flags);
417 list_splice_init(&shost->eh_cmd_q, &error_q);
418 spin_unlock_irqrestore(shost->host_lock, flags);
420 SAS_DPRINTK("Enter %s\n", __FUNCTION__);
422 /* All tasks on this list were marked SAS_TASK_STATE_ABORTED
423 * by sas_scsi_timed_out() callback.
426 SAS_DPRINTK("going over list...\n");
427 list_for_each_entry_safe(cmd, n, &error_q, eh_entry) {
428 struct sas_task *task = TO_SAS_TASK(cmd);
429 list_del_init(&cmd->eh_entry);
432 SAS_DPRINTK("%s: taskless cmd?!\n", __FUNCTION__);
436 spin_lock_irqsave(&task->task_state_lock, flags);
437 need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET;
439 task_sas_phy = task->dev->port->phy;
440 spin_unlock_irqrestore(&task->task_state_lock, flags);
442 SAS_DPRINTK("trying to find task 0x%p\n", task);
443 res = sas_scsi_find_task(task);
449 SAS_DPRINTK("%s: task 0x%p is done\n", __FUNCTION__,
451 task->task_done(task);
453 eh_reset_phy_helper(task_sas_phy);
455 case TASK_IS_ABORTED:
456 SAS_DPRINTK("%s: task 0x%p is aborted\n",
458 task->task_done(task);
460 eh_reset_phy_helper(task_sas_phy);
463 SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task);
464 tmf_resp = sas_recover_lu(task->dev, cmd);
465 if (tmf_resp == TMF_RESP_FUNC_COMPLETE) {
466 SAS_DPRINTK("dev %016llx LU %x is "
470 task->task_done(task);
472 eh_reset_phy_helper(task_sas_phy);
473 sas_scsi_clear_queue_lu(&error_q, cmd);
477 case TASK_IS_NOT_AT_LU:
478 SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n",
480 tmf_resp = sas_recover_I_T(task->dev);
481 if (tmf_resp == TMF_RESP_FUNC_COMPLETE) {
482 SAS_DPRINTK("I_T %016llx recovered\n",
483 SAS_ADDR(task->dev->sas_addr));
484 task->task_done(task);
486 eh_reset_phy_helper(task_sas_phy);
487 sas_scsi_clear_queue_I_T(&error_q, task->dev);
490 /* Hammer time :-) */
491 if (i->dft->lldd_clear_nexus_port) {
492 struct asd_sas_port *port = task->dev->port;
493 SAS_DPRINTK("clearing nexus for port:%d\n",
495 res = i->dft->lldd_clear_nexus_port(port);
496 if (res == TMF_RESP_FUNC_COMPLETE) {
497 SAS_DPRINTK("clear nexus port:%d "
498 "succeeded\n", port->id);
499 task->task_done(task);
501 eh_reset_phy_helper(task_sas_phy);
502 sas_scsi_clear_queue_port(&error_q,
507 if (i->dft->lldd_clear_nexus_ha) {
508 SAS_DPRINTK("clear nexus ha\n");
509 res = i->dft->lldd_clear_nexus_ha(ha);
510 if (res == TMF_RESP_FUNC_COMPLETE) {
511 SAS_DPRINTK("clear nexus ha "
513 task->task_done(task);
515 eh_reset_phy_helper(task_sas_phy);
519 /* If we are here -- this means that no amount
520 * of effort could recover from errors. Quite
521 * possibly the HA just disappeared.
523 SAS_DPRINTK("error from device %llx, LUN %x "
524 "couldn't be recovered in any way\n",
525 SAS_ADDR(task->dev->sas_addr),
528 task->task_done(task);
530 eh_reset_phy_helper(task_sas_phy);
535 scsi_eh_flush_done_q(&ha->eh_done_q);
536 SAS_DPRINTK("--- Exit %s\n", __FUNCTION__);
539 SAS_DPRINTK("--- Exit %s -- clear_q\n", __FUNCTION__);
540 list_for_each_entry_safe(cmd, n, &error_q, eh_entry) {
541 struct sas_task *task = TO_SAS_TASK(cmd);
542 list_del_init(&cmd->eh_entry);
543 task->task_done(task);
547 enum scsi_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd)
549 struct sas_task *task = TO_SAS_TASK(cmd);
553 cmd->timeout_per_command /= 2;
554 SAS_DPRINTK("command 0x%p, task 0x%p, gone: %s\n",
555 cmd, task, (cmd->timeout_per_command ?
556 "EH_RESET_TIMER" : "EH_NOT_HANDLED"));
557 if (!cmd->timeout_per_command)
558 return EH_NOT_HANDLED;
559 return EH_RESET_TIMER;
562 spin_lock_irqsave(&task->task_state_lock, flags);
563 BUG_ON(task->task_state_flags & SAS_TASK_STATE_ABORTED);
564 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
565 spin_unlock_irqrestore(&task->task_state_lock, flags);
566 SAS_DPRINTK("command 0x%p, task 0x%p, timed out: EH_HANDLED\n",
570 if (!(task->task_state_flags & SAS_TASK_AT_INITIATOR)) {
571 spin_unlock_irqrestore(&task->task_state_lock, flags);
572 SAS_DPRINTK("command 0x%p, task 0x%p, not at initiator: "
575 return EH_RESET_TIMER;
577 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
578 spin_unlock_irqrestore(&task->task_state_lock, flags);
580 SAS_DPRINTK("command 0x%p, task 0x%p, timed out: EH_NOT_HANDLED\n",
583 return EH_NOT_HANDLED;
586 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy)
588 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent);
589 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
590 struct domain_device *found_dev = NULL;
594 spin_lock_irqsave(&ha->phy_port_lock, flags);
595 for (i = 0; i < ha->num_phys; i++) {
596 struct asd_sas_port *port = ha->sas_port[i];
597 struct domain_device *dev;
599 spin_lock(&port->dev_list_lock);
600 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
601 if (rphy == dev->rphy) {
603 spin_unlock(&port->dev_list_lock);
607 spin_unlock(&port->dev_list_lock);
610 spin_unlock_irqrestore(&ha->phy_port_lock, flags);
615 static inline struct domain_device *sas_find_target(struct scsi_target *starget)
617 struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent);
619 return sas_find_dev_by_rphy(rphy);
622 int sas_target_alloc(struct scsi_target *starget)
624 struct domain_device *found_dev = sas_find_target(starget);
629 starget->hostdata = found_dev;
633 #define SAS_DEF_QD 32
634 #define SAS_MAX_QD 64
636 int sas_slave_configure(struct scsi_device *scsi_dev)
638 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
639 struct sas_ha_struct *sas_ha;
641 BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE);
643 sas_ha = dev->port->ha;
645 sas_read_port_mode_page(scsi_dev);
647 if (scsi_dev->tagged_supported) {
648 scsi_set_tag_type(scsi_dev, MSG_SIMPLE_TAG);
649 scsi_activate_tcq(scsi_dev, SAS_DEF_QD);
651 SAS_DPRINTK("device %llx, LUN %x doesn't support "
652 "TCQ\n", SAS_ADDR(dev->sas_addr),
654 scsi_dev->tagged_supported = 0;
655 scsi_set_tag_type(scsi_dev, 0);
656 scsi_deactivate_tcq(scsi_dev, 1);
662 void sas_slave_destroy(struct scsi_device *scsi_dev)
666 int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth)
668 int res = min(new_depth, SAS_MAX_QD);
670 if (scsi_dev->tagged_supported)
671 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev),
674 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
675 sas_printk("device %llx LUN %x queue depth changed to 1\n",
676 SAS_ADDR(dev->sas_addr),
678 scsi_adjust_queue_depth(scsi_dev, 0, 1);
685 int sas_change_queue_type(struct scsi_device *scsi_dev, int qt)
687 if (!scsi_dev->tagged_supported)
690 scsi_deactivate_tcq(scsi_dev, 1);
692 scsi_set_tag_type(scsi_dev, qt);
693 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
698 int sas_bios_param(struct scsi_device *scsi_dev,
699 struct block_device *bdev,
700 sector_t capacity, int *hsc)
704 sector_div(capacity, 255*63);
710 /* ---------- Task Collector Thread implementation ---------- */
712 static void sas_queue(struct sas_ha_struct *sas_ha)
714 struct scsi_core *core = &sas_ha->core;
719 struct sas_internal *i = to_sas_internal(core->shost->transportt);
721 spin_lock_irqsave(&core->task_queue_lock, flags);
722 while (!core->queue_thread_kill &&
723 !list_empty(&core->task_queue)) {
725 can_queue = sas_ha->lldd_queue_size - core->task_queue_size;
726 if (can_queue >= 0) {
727 can_queue = core->task_queue_size;
728 list_splice_init(&core->task_queue, &q);
730 struct list_head *a, *n;
732 can_queue = sas_ha->lldd_queue_size;
733 list_for_each_safe(a, n, &core->task_queue) {
734 list_move_tail(a, &q);
735 if (--can_queue == 0)
738 can_queue = sas_ha->lldd_queue_size;
740 core->task_queue_size -= can_queue;
741 spin_unlock_irqrestore(&core->task_queue_lock, flags);
743 struct sas_task *task = list_entry(q.next,
747 res = i->dft->lldd_execute_task(task, can_queue,
750 __list_add(&q, task->list.prev, &task->list);
752 spin_lock_irqsave(&core->task_queue_lock, flags);
754 list_splice_init(&q, &core->task_queue); /*at head*/
755 core->task_queue_size += can_queue;
758 spin_unlock_irqrestore(&core->task_queue_lock, flags);
761 static DECLARE_COMPLETION(queue_th_comp);
764 * sas_queue_thread -- The Task Collector thread
765 * @_sas_ha: pointer to struct sas_ha
767 static int sas_queue_thread(void *_sas_ha)
769 struct sas_ha_struct *sas_ha = _sas_ha;
770 struct scsi_core *core = &sas_ha->core;
772 daemonize("sas_queue_%d", core->shost->host_no);
773 current->flags |= PF_NOFREEZE;
775 complete(&queue_th_comp);
778 down_interruptible(&core->queue_thread_sema);
780 if (core->queue_thread_kill)
784 complete(&queue_th_comp);
789 int sas_init_queue(struct sas_ha_struct *sas_ha)
792 struct scsi_core *core = &sas_ha->core;
794 spin_lock_init(&core->task_queue_lock);
795 core->task_queue_size = 0;
796 INIT_LIST_HEAD(&core->task_queue);
797 init_MUTEX_LOCKED(&core->queue_thread_sema);
799 res = kernel_thread(sas_queue_thread, sas_ha, 0);
801 wait_for_completion(&queue_th_comp);
803 return res < 0 ? res : 0;
806 void sas_shutdown_queue(struct sas_ha_struct *sas_ha)
809 struct scsi_core *core = &sas_ha->core;
810 struct sas_task *task, *n;
812 init_completion(&queue_th_comp);
813 core->queue_thread_kill = 1;
814 up(&core->queue_thread_sema);
815 wait_for_completion(&queue_th_comp);
817 if (!list_empty(&core->task_queue))
818 SAS_DPRINTK("HA: %llx: scsi core task queue is NOT empty!?\n",
819 SAS_ADDR(sas_ha->sas_addr));
821 spin_lock_irqsave(&core->task_queue_lock, flags);
822 list_for_each_entry_safe(task, n, &core->task_queue, list) {
823 struct scsi_cmnd *cmd = task->uldd_task;
825 list_del_init(&task->list);
827 ASSIGN_SAS_TASK(cmd, NULL);
829 cmd->result = DID_ABORT << 16;
832 spin_unlock_irqrestore(&core->task_queue_lock, flags);
836 * Call the LLDD task abort routine directly. This function is intended for
837 * use by upper layers that need to tell the LLDD to abort a task.
839 int __sas_task_abort(struct sas_task *task)
841 struct sas_internal *si =
842 to_sas_internal(task->dev->port->ha->core.shost->transportt);
846 spin_lock_irqsave(&task->task_state_lock, flags);
847 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
848 task->task_state_flags & SAS_TASK_STATE_DONE) {
849 spin_unlock_irqrestore(&task->task_state_lock, flags);
850 SAS_DPRINTK("%s: Task %p already finished.\n", __FUNCTION__,
854 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
855 spin_unlock_irqrestore(&task->task_state_lock, flags);
857 if (!si->dft->lldd_abort_task)
860 res = si->dft->lldd_abort_task(task);
862 spin_lock_irqsave(&task->task_state_lock, flags);
863 if ((task->task_state_flags & SAS_TASK_STATE_DONE) ||
864 (res == TMF_RESP_FUNC_COMPLETE))
866 spin_unlock_irqrestore(&task->task_state_lock, flags);
867 task->task_done(task);
871 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
872 task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
873 spin_unlock_irqrestore(&task->task_state_lock, flags);
879 * Tell an upper layer that it needs to initiate an abort for a given task.
880 * This should only ever be called by an LLDD.
882 void sas_task_abort(struct sas_task *task)
884 struct scsi_cmnd *sc = task->uldd_task;
886 /* Escape for libsas internal commands */
888 if (!del_timer(&task->timer))
890 task->timer.function(task->timer.data);
894 scsi_req_abort_cmd(sc);
895 scsi_schedule_eh(sc->device->host);
898 EXPORT_SYMBOL_GPL(sas_queuecommand);
899 EXPORT_SYMBOL_GPL(sas_target_alloc);
900 EXPORT_SYMBOL_GPL(sas_slave_configure);
901 EXPORT_SYMBOL_GPL(sas_slave_destroy);
902 EXPORT_SYMBOL_GPL(sas_change_queue_depth);
903 EXPORT_SYMBOL_GPL(sas_change_queue_type);
904 EXPORT_SYMBOL_GPL(sas_bios_param);
905 EXPORT_SYMBOL_GPL(__sas_task_abort);
906 EXPORT_SYMBOL_GPL(sas_task_abort);
907 EXPORT_SYMBOL_GPL(sas_phy_reset);
908 EXPORT_SYMBOL_GPL(sas_phy_enable);