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 {
287 static enum task_disposition sas_scsi_find_task(struct sas_task *task)
289 struct sas_ha_struct *ha = task->dev->port->ha;
292 struct sas_internal *si =
293 to_sas_internal(task->dev->port->ha->core.shost->transportt);
295 if (ha->lldd_max_execute_num > 1) {
296 struct scsi_core *core = &ha->core;
297 struct sas_task *t, *n;
299 spin_lock_irqsave(&core->task_queue_lock, flags);
300 list_for_each_entry_safe(t, n, &core->task_queue, list) {
302 list_del_init(&t->list);
303 spin_unlock_irqrestore(&core->task_queue_lock,
305 SAS_DPRINTK("%s: task 0x%p aborted from "
308 return TASK_IS_ABORTED;
311 spin_unlock_irqrestore(&core->task_queue_lock, flags);
314 for (i = 0; i < 5; i++) {
315 SAS_DPRINTK("%s: aborting task 0x%p\n", __FUNCTION__, task);
316 res = si->dft->lldd_abort_task(task);
318 spin_lock_irqsave(&task->task_state_lock, flags);
319 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
320 spin_unlock_irqrestore(&task->task_state_lock, flags);
321 SAS_DPRINTK("%s: task 0x%p is done\n", __FUNCTION__,
325 spin_unlock_irqrestore(&task->task_state_lock, flags);
327 if (res == TMF_RESP_FUNC_COMPLETE) {
328 SAS_DPRINTK("%s: task 0x%p is aborted\n",
330 return TASK_IS_ABORTED;
331 } else if (si->dft->lldd_query_task) {
332 SAS_DPRINTK("%s: querying task 0x%p\n",
334 res = si->dft->lldd_query_task(task);
336 case TMF_RESP_FUNC_SUCC:
337 SAS_DPRINTK("%s: task 0x%p at LU\n",
339 return TASK_IS_AT_LU;
340 case TMF_RESP_FUNC_COMPLETE:
341 SAS_DPRINTK("%s: task 0x%p not at LU\n",
343 return TASK_IS_NOT_AT_LU;
344 case TMF_RESP_FUNC_FAILED:
345 SAS_DPRINTK("%s: task 0x%p failed to abort\n",
347 return TASK_ABORT_FAILED;
355 static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd)
357 int res = TMF_RESP_FUNC_FAILED;
359 struct sas_internal *i =
360 to_sas_internal(dev->port->ha->core.shost->transportt);
362 int_to_scsilun(cmd->device->lun, &lun);
364 SAS_DPRINTK("eh: device %llx LUN %x has the task\n",
365 SAS_ADDR(dev->sas_addr),
368 if (i->dft->lldd_abort_task_set)
369 res = i->dft->lldd_abort_task_set(dev, lun.scsi_lun);
371 if (res == TMF_RESP_FUNC_FAILED) {
372 if (i->dft->lldd_clear_task_set)
373 res = i->dft->lldd_clear_task_set(dev, lun.scsi_lun);
376 if (res == TMF_RESP_FUNC_FAILED) {
377 if (i->dft->lldd_lu_reset)
378 res = i->dft->lldd_lu_reset(dev, lun.scsi_lun);
384 static int sas_recover_I_T(struct domain_device *dev)
386 int res = TMF_RESP_FUNC_FAILED;
387 struct sas_internal *i =
388 to_sas_internal(dev->port->ha->core.shost->transportt);
390 SAS_DPRINTK("I_T nexus reset for dev %016llx\n",
391 SAS_ADDR(dev->sas_addr));
393 if (i->dft->lldd_I_T_nexus_reset)
394 res = i->dft->lldd_I_T_nexus_reset(dev);
399 static int eh_reset_phy_helper(struct sas_phy *phy)
403 tmf_resp = sas_phy_reset(phy, 1);
405 SAS_DPRINTK("Hard reset of phy %d failed 0x%x\n",
406 phy->identify.phy_identifier,
412 void sas_scsi_recover_host(struct Scsi_Host *shost)
414 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
417 struct scsi_cmnd *cmd, *n;
418 enum task_disposition res = TASK_IS_DONE;
419 int tmf_resp, need_reset;
420 struct sas_internal *i = to_sas_internal(shost->transportt);
421 struct sas_phy *task_sas_phy = NULL;
423 spin_lock_irqsave(shost->host_lock, flags);
424 list_splice_init(&shost->eh_cmd_q, &error_q);
425 spin_unlock_irqrestore(shost->host_lock, flags);
427 SAS_DPRINTK("Enter %s\n", __FUNCTION__);
429 /* All tasks on this list were marked SAS_TASK_STATE_ABORTED
430 * by sas_scsi_timed_out() callback.
433 SAS_DPRINTK("going over list...\n");
434 list_for_each_entry_safe(cmd, n, &error_q, eh_entry) {
435 struct sas_task *task = TO_SAS_TASK(cmd);
436 list_del_init(&cmd->eh_entry);
439 SAS_DPRINTK("%s: taskless cmd?!\n", __FUNCTION__);
443 spin_lock_irqsave(&task->task_state_lock, flags);
444 need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET;
446 task_sas_phy = task->dev->port->phy;
447 spin_unlock_irqrestore(&task->task_state_lock, flags);
449 SAS_DPRINTK("trying to find task 0x%p\n", task);
450 res = sas_scsi_find_task(task);
456 SAS_DPRINTK("%s: task 0x%p is done\n", __FUNCTION__,
458 task->task_done(task);
460 eh_reset_phy_helper(task_sas_phy);
462 case TASK_IS_ABORTED:
463 SAS_DPRINTK("%s: task 0x%p is aborted\n",
465 task->task_done(task);
467 eh_reset_phy_helper(task_sas_phy);
470 SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task);
471 tmf_resp = sas_recover_lu(task->dev, cmd);
472 if (tmf_resp == TMF_RESP_FUNC_COMPLETE) {
473 SAS_DPRINTK("dev %016llx LU %x is "
477 task->task_done(task);
479 eh_reset_phy_helper(task_sas_phy);
480 sas_scsi_clear_queue_lu(&error_q, cmd);
484 case TASK_IS_NOT_AT_LU:
485 case TASK_ABORT_FAILED:
486 SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n",
488 tmf_resp = sas_recover_I_T(task->dev);
489 if (tmf_resp == TMF_RESP_FUNC_COMPLETE) {
490 SAS_DPRINTK("I_T %016llx recovered\n",
491 SAS_ADDR(task->dev->sas_addr));
492 task->task_done(task);
494 eh_reset_phy_helper(task_sas_phy);
495 sas_scsi_clear_queue_I_T(&error_q, task->dev);
498 /* Hammer time :-) */
499 if (i->dft->lldd_clear_nexus_port) {
500 struct asd_sas_port *port = task->dev->port;
501 SAS_DPRINTK("clearing nexus for port:%d\n",
503 res = i->dft->lldd_clear_nexus_port(port);
504 if (res == TMF_RESP_FUNC_COMPLETE) {
505 SAS_DPRINTK("clear nexus port:%d "
506 "succeeded\n", port->id);
507 task->task_done(task);
509 eh_reset_phy_helper(task_sas_phy);
510 sas_scsi_clear_queue_port(&error_q,
515 if (i->dft->lldd_clear_nexus_ha) {
516 SAS_DPRINTK("clear nexus ha\n");
517 res = i->dft->lldd_clear_nexus_ha(ha);
518 if (res == TMF_RESP_FUNC_COMPLETE) {
519 SAS_DPRINTK("clear nexus ha "
521 task->task_done(task);
523 eh_reset_phy_helper(task_sas_phy);
527 /* If we are here -- this means that no amount
528 * of effort could recover from errors. Quite
529 * possibly the HA just disappeared.
531 SAS_DPRINTK("error from device %llx, LUN %x "
532 "couldn't be recovered in any way\n",
533 SAS_ADDR(task->dev->sas_addr),
536 task->task_done(task);
538 eh_reset_phy_helper(task_sas_phy);
543 scsi_eh_flush_done_q(&ha->eh_done_q);
544 SAS_DPRINTK("--- Exit %s\n", __FUNCTION__);
547 SAS_DPRINTK("--- Exit %s -- clear_q\n", __FUNCTION__);
548 list_for_each_entry_safe(cmd, n, &error_q, eh_entry) {
549 struct sas_task *task = TO_SAS_TASK(cmd);
550 list_del_init(&cmd->eh_entry);
551 task->task_done(task);
555 enum scsi_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd)
557 struct sas_task *task = TO_SAS_TASK(cmd);
561 cmd->timeout_per_command /= 2;
562 SAS_DPRINTK("command 0x%p, task 0x%p, gone: %s\n",
563 cmd, task, (cmd->timeout_per_command ?
564 "EH_RESET_TIMER" : "EH_NOT_HANDLED"));
565 if (!cmd->timeout_per_command)
566 return EH_NOT_HANDLED;
567 return EH_RESET_TIMER;
570 spin_lock_irqsave(&task->task_state_lock, flags);
571 BUG_ON(task->task_state_flags & SAS_TASK_STATE_ABORTED);
572 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
573 spin_unlock_irqrestore(&task->task_state_lock, flags);
574 SAS_DPRINTK("command 0x%p, task 0x%p, timed out: EH_HANDLED\n",
578 if (!(task->task_state_flags & SAS_TASK_AT_INITIATOR)) {
579 spin_unlock_irqrestore(&task->task_state_lock, flags);
580 SAS_DPRINTK("command 0x%p, task 0x%p, not at initiator: "
583 return EH_RESET_TIMER;
585 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
586 spin_unlock_irqrestore(&task->task_state_lock, flags);
588 SAS_DPRINTK("command 0x%p, task 0x%p, timed out: EH_NOT_HANDLED\n",
591 return EH_NOT_HANDLED;
594 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy)
596 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent);
597 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
598 struct domain_device *found_dev = NULL;
602 spin_lock_irqsave(&ha->phy_port_lock, flags);
603 for (i = 0; i < ha->num_phys; i++) {
604 struct asd_sas_port *port = ha->sas_port[i];
605 struct domain_device *dev;
607 spin_lock(&port->dev_list_lock);
608 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
609 if (rphy == dev->rphy) {
611 spin_unlock(&port->dev_list_lock);
615 spin_unlock(&port->dev_list_lock);
618 spin_unlock_irqrestore(&ha->phy_port_lock, flags);
623 static inline struct domain_device *sas_find_target(struct scsi_target *starget)
625 struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent);
627 return sas_find_dev_by_rphy(rphy);
630 int sas_target_alloc(struct scsi_target *starget)
632 struct domain_device *found_dev = sas_find_target(starget);
637 starget->hostdata = found_dev;
641 #define SAS_DEF_QD 32
642 #define SAS_MAX_QD 64
644 int sas_slave_configure(struct scsi_device *scsi_dev)
646 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
647 struct sas_ha_struct *sas_ha;
649 BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE);
651 sas_ha = dev->port->ha;
653 sas_read_port_mode_page(scsi_dev);
655 if (scsi_dev->tagged_supported) {
656 scsi_set_tag_type(scsi_dev, MSG_SIMPLE_TAG);
657 scsi_activate_tcq(scsi_dev, SAS_DEF_QD);
659 SAS_DPRINTK("device %llx, LUN %x doesn't support "
660 "TCQ\n", SAS_ADDR(dev->sas_addr),
662 scsi_dev->tagged_supported = 0;
663 scsi_set_tag_type(scsi_dev, 0);
664 scsi_deactivate_tcq(scsi_dev, 1);
670 void sas_slave_destroy(struct scsi_device *scsi_dev)
674 int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth)
676 int res = min(new_depth, SAS_MAX_QD);
678 if (scsi_dev->tagged_supported)
679 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev),
682 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
683 sas_printk("device %llx LUN %x queue depth changed to 1\n",
684 SAS_ADDR(dev->sas_addr),
686 scsi_adjust_queue_depth(scsi_dev, 0, 1);
693 int sas_change_queue_type(struct scsi_device *scsi_dev, int qt)
695 if (!scsi_dev->tagged_supported)
698 scsi_deactivate_tcq(scsi_dev, 1);
700 scsi_set_tag_type(scsi_dev, qt);
701 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
706 int sas_bios_param(struct scsi_device *scsi_dev,
707 struct block_device *bdev,
708 sector_t capacity, int *hsc)
712 sector_div(capacity, 255*63);
718 /* ---------- Task Collector Thread implementation ---------- */
720 static void sas_queue(struct sas_ha_struct *sas_ha)
722 struct scsi_core *core = &sas_ha->core;
727 struct sas_internal *i = to_sas_internal(core->shost->transportt);
729 spin_lock_irqsave(&core->task_queue_lock, flags);
730 while (!core->queue_thread_kill &&
731 !list_empty(&core->task_queue)) {
733 can_queue = sas_ha->lldd_queue_size - core->task_queue_size;
734 if (can_queue >= 0) {
735 can_queue = core->task_queue_size;
736 list_splice_init(&core->task_queue, &q);
738 struct list_head *a, *n;
740 can_queue = sas_ha->lldd_queue_size;
741 list_for_each_safe(a, n, &core->task_queue) {
742 list_move_tail(a, &q);
743 if (--can_queue == 0)
746 can_queue = sas_ha->lldd_queue_size;
748 core->task_queue_size -= can_queue;
749 spin_unlock_irqrestore(&core->task_queue_lock, flags);
751 struct sas_task *task = list_entry(q.next,
755 res = i->dft->lldd_execute_task(task, can_queue,
758 __list_add(&q, task->list.prev, &task->list);
760 spin_lock_irqsave(&core->task_queue_lock, flags);
762 list_splice_init(&q, &core->task_queue); /*at head*/
763 core->task_queue_size += can_queue;
766 spin_unlock_irqrestore(&core->task_queue_lock, flags);
769 static DECLARE_COMPLETION(queue_th_comp);
772 * sas_queue_thread -- The Task Collector thread
773 * @_sas_ha: pointer to struct sas_ha
775 static int sas_queue_thread(void *_sas_ha)
777 struct sas_ha_struct *sas_ha = _sas_ha;
778 struct scsi_core *core = &sas_ha->core;
780 daemonize("sas_queue_%d", core->shost->host_no);
781 current->flags |= PF_NOFREEZE;
783 complete(&queue_th_comp);
786 down_interruptible(&core->queue_thread_sema);
788 if (core->queue_thread_kill)
792 complete(&queue_th_comp);
797 int sas_init_queue(struct sas_ha_struct *sas_ha)
800 struct scsi_core *core = &sas_ha->core;
802 spin_lock_init(&core->task_queue_lock);
803 core->task_queue_size = 0;
804 INIT_LIST_HEAD(&core->task_queue);
805 init_MUTEX_LOCKED(&core->queue_thread_sema);
807 res = kernel_thread(sas_queue_thread, sas_ha, 0);
809 wait_for_completion(&queue_th_comp);
811 return res < 0 ? res : 0;
814 void sas_shutdown_queue(struct sas_ha_struct *sas_ha)
817 struct scsi_core *core = &sas_ha->core;
818 struct sas_task *task, *n;
820 init_completion(&queue_th_comp);
821 core->queue_thread_kill = 1;
822 up(&core->queue_thread_sema);
823 wait_for_completion(&queue_th_comp);
825 if (!list_empty(&core->task_queue))
826 SAS_DPRINTK("HA: %llx: scsi core task queue is NOT empty!?\n",
827 SAS_ADDR(sas_ha->sas_addr));
829 spin_lock_irqsave(&core->task_queue_lock, flags);
830 list_for_each_entry_safe(task, n, &core->task_queue, list) {
831 struct scsi_cmnd *cmd = task->uldd_task;
833 list_del_init(&task->list);
835 ASSIGN_SAS_TASK(cmd, NULL);
837 cmd->result = DID_ABORT << 16;
840 spin_unlock_irqrestore(&core->task_queue_lock, flags);
844 * Call the LLDD task abort routine directly. This function is intended for
845 * use by upper layers that need to tell the LLDD to abort a task.
847 int __sas_task_abort(struct sas_task *task)
849 struct sas_internal *si =
850 to_sas_internal(task->dev->port->ha->core.shost->transportt);
854 spin_lock_irqsave(&task->task_state_lock, flags);
855 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
856 task->task_state_flags & SAS_TASK_STATE_DONE) {
857 spin_unlock_irqrestore(&task->task_state_lock, flags);
858 SAS_DPRINTK("%s: Task %p already finished.\n", __FUNCTION__,
862 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
863 spin_unlock_irqrestore(&task->task_state_lock, flags);
865 if (!si->dft->lldd_abort_task)
868 res = si->dft->lldd_abort_task(task);
870 spin_lock_irqsave(&task->task_state_lock, flags);
871 if ((task->task_state_flags & SAS_TASK_STATE_DONE) ||
872 (res == TMF_RESP_FUNC_COMPLETE))
874 spin_unlock_irqrestore(&task->task_state_lock, flags);
875 task->task_done(task);
879 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
880 task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
881 spin_unlock_irqrestore(&task->task_state_lock, flags);
887 * Tell an upper layer that it needs to initiate an abort for a given task.
888 * This should only ever be called by an LLDD.
890 void sas_task_abort(struct sas_task *task)
892 struct scsi_cmnd *sc = task->uldd_task;
894 /* Escape for libsas internal commands */
896 if (!del_timer(&task->timer))
898 task->timer.function(task->timer.data);
902 scsi_req_abort_cmd(sc);
903 scsi_schedule_eh(sc->device->host);
906 EXPORT_SYMBOL_GPL(sas_queuecommand);
907 EXPORT_SYMBOL_GPL(sas_target_alloc);
908 EXPORT_SYMBOL_GPL(sas_slave_configure);
909 EXPORT_SYMBOL_GPL(sas_slave_destroy);
910 EXPORT_SYMBOL_GPL(sas_change_queue_depth);
911 EXPORT_SYMBOL_GPL(sas_change_queue_type);
912 EXPORT_SYMBOL_GPL(sas_bios_param);
913 EXPORT_SYMBOL_GPL(__sas_task_abort);
914 EXPORT_SYMBOL_GPL(sas_task_abort);
915 EXPORT_SYMBOL_GPL(sas_phy_reset);
916 EXPORT_SYMBOL_GPL(sas_phy_enable);