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[SCSI] Add SATA support to libsas
[linux-2.6/mini2440.git] / drivers / scsi / libsas / sas_scsi_host.c
blob3220b3fc6b20b530edbac4f40b13398b20f5fa24
1 /*
2 * Serial Attached SCSI (SAS) class SCSI Host glue.
3 *
4 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
5 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
6 *
7 * This file is licensed under GPLv2.
8 *
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.
13 *
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.
18 *
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
22 * USA
23 *
24 */
25
26 #include <linux/kthread.h>
27
28 #include "sas_internal.h"
29
30 #include <scsi/scsi_host.h>
31 #include <scsi/scsi_device.h>
32 #include <scsi/scsi_tcq.h>
33 #include <scsi/scsi.h>
34 #include <scsi/scsi_eh.h>
35 #include <scsi/scsi_transport.h>
36 #include <scsi/scsi_transport_sas.h>
37 #include "../scsi_sas_internal.h"
38 #include "../scsi_transport_api.h"
39 #include "../scsi_priv.h"
40
41 #include <linux/err.h>
42 #include <linux/blkdev.h>
43 #include <linux/freezer.h>
44 #include <linux/scatterlist.h>
45 #include <linux/libata.h>
46
47 /* ---------- SCSI Host glue ---------- */
48
49 #define TO_SAS_TASK(_scsi_cmd) ((void *)(_scsi_cmd)->host_scribble)
50 #define ASSIGN_SAS_TASK(_sc, _t) do { (_sc)->host_scribble = (void *) _t; } while (0)
51
52 static void sas_scsi_task_done(struct sas_task *task)
53 {
54 struct task_status_struct *ts = &task->task_status;
55 struct scsi_cmnd *sc = task->uldd_task;
56 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(sc->device->host);
57 unsigned ts_flags = task->task_state_flags;
58 int hs = 0, stat = 0;
59
60 if (unlikely(!sc)) {
61 SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n");
62 list_del_init(&task->list);
63 sas_free_task(task);
64 return;
65 }
66
67 if (ts->resp == SAS_TASK_UNDELIVERED) {
68 /* transport error */
69 hs = DID_NO_CONNECT;
70 } else { /* ts->resp == SAS_TASK_COMPLETE */
71 /* task delivered, what happened afterwards? */
72 switch (ts->stat) {
73 case SAS_DEV_NO_RESPONSE:
74 case SAS_INTERRUPTED:
75 case SAS_PHY_DOWN:
76 case SAS_NAK_R_ERR:
77 case SAS_OPEN_TO:
78 hs = DID_NO_CONNECT;
79 break;
80 case SAS_DATA_UNDERRUN:
81 scsi_set_resid(sc, ts->residual);
82 if (scsi_bufflen(sc) - scsi_get_resid(sc) < sc->underflow)
83 hs = DID_ERROR;
84 break;
85 case SAS_DATA_OVERRUN:
86 hs = DID_ERROR;
87 break;
88 case SAS_QUEUE_FULL:
89 hs = DID_SOFT_ERROR; /* retry */
90 break;
91 case SAS_DEVICE_UNKNOWN:
92 hs = DID_BAD_TARGET;
93 break;
94 case SAS_SG_ERR:
95 hs = DID_PARITY;
96 break;
97 case SAS_OPEN_REJECT:
98 if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY)
99 hs = DID_SOFT_ERROR; /* retry */
100 else
101 hs = DID_ERROR;
102 break;
103 case SAS_PROTO_RESPONSE:
104 SAS_DPRINTK("LLDD:%s sent SAS_PROTO_RESP for an SSP "
105 "task; please report this\n",
106 task->dev->port->ha->sas_ha_name);
107 break;
108 case SAS_ABORTED_TASK:
109 hs = DID_ABORT;
110 break;
111 case SAM_CHECK_COND:
112 memcpy(sc->sense_buffer, ts->buf,
113 max(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size));
114 stat = SAM_CHECK_COND;
115 break;
116 default:
117 stat = ts->stat;
118 break;
119 }
120 }
121 ASSIGN_SAS_TASK(sc, NULL);
122 sc->result = (hs << 16) | stat;
123 list_del_init(&task->list);
124 sas_free_task(task);
125 /* This is very ugly but this is how SCSI Core works. */
126 if (ts_flags & SAS_TASK_STATE_ABORTED)
127 scsi_eh_finish_cmd(sc, &sas_ha->eh_done_q);
128 else
129 sc->scsi_done(sc);
130 }
131
132 static enum task_attribute sas_scsi_get_task_attr(struct scsi_cmnd *cmd)
133 {
134 enum task_attribute ta = TASK_ATTR_SIMPLE;
135 if (cmd->request && blk_rq_tagged(cmd->request)) {
136 if (cmd->device->ordered_tags &&
137 (cmd->request->cmd_flags & REQ_HARDBARRIER))
138 ta = TASK_ATTR_ORDERED;
139 }
140 return ta;
141 }
142
143 static struct sas_task *sas_create_task(struct scsi_cmnd *cmd,
144 struct domain_device *dev,
145 gfp_t gfp_flags)
146 {
147 struct sas_task *task = sas_alloc_task(gfp_flags);
148 struct scsi_lun lun;
149
150 if (!task)
151 return NULL;
152
153 *(u32 *)cmd->sense_buffer = 0;
154 task->uldd_task = cmd;
155 ASSIGN_SAS_TASK(cmd, task);
156
157 task->dev = dev;
158 task->task_proto = task->dev->tproto; /* BUG_ON(!SSP) */
159
160 task->ssp_task.retry_count = 1;
161 int_to_scsilun(cmd->device->lun, &lun);
162 memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8);
163 task->ssp_task.task_attr = sas_scsi_get_task_attr(cmd);
164 memcpy(task->ssp_task.cdb, cmd->cmnd, 16);
165
166 task->scatter = scsi_sglist(cmd);
167 task->num_scatter = scsi_sg_count(cmd);
168 task->total_xfer_len = scsi_bufflen(cmd);
169 task->data_dir = cmd->sc_data_direction;
170
171 task->task_done = sas_scsi_task_done;
172
173 return task;
174 }
175
176 static int sas_queue_up(struct sas_task *task)
177 {
178 struct sas_ha_struct *sas_ha = task->dev->port->ha;
179 struct scsi_core *core = &sas_ha->core;
180 unsigned long flags;
181 LIST_HEAD(list);
182
183 spin_lock_irqsave(&core->task_queue_lock, flags);
184 if (sas_ha->lldd_queue_size < core->task_queue_size + 1) {
185 spin_unlock_irqrestore(&core->task_queue_lock, flags);
186 return -SAS_QUEUE_FULL;
187 }
188 list_add_tail(&task->list, &core->task_queue);
189 core->task_queue_size += 1;
190 spin_unlock_irqrestore(&core->task_queue_lock, flags);
191 wake_up_process(core->queue_thread);
192
193 return 0;
194 }
195
196 static inline int dev_is_sata(struct domain_device *dev)
197 {
198 return (dev->rphy->identify.target_port_protocols & SAS_PROTOCOL_SATA);
199 }
200
201 /**
202 * sas_queuecommand -- Enqueue a command for processing
203 * @parameters: See SCSI Core documentation
204 *
205 * Note: XXX: Remove the host unlock/lock pair when SCSI Core can
206 * call us without holding an IRQ spinlock...
207 */
208 int sas_queuecommand(struct scsi_cmnd *cmd,
209 void (*scsi_done)(struct scsi_cmnd *))
210 {
211 int res = 0;
212 struct domain_device *dev = cmd_to_domain_dev(cmd);
213 struct Scsi_Host *host = cmd->device->host;
214 struct sas_internal *i = to_sas_internal(host->transportt);
215
216 spin_unlock_irq(host->host_lock);
217
218 {
219 struct sas_ha_struct *sas_ha = dev->port->ha;
220 struct sas_task *task;
221
222 if (dev_is_sata(dev)) {
223 res = ata_sas_queuecmd(cmd, scsi_done,
224 dev->sata_dev.ap);
225 goto out;
226 }
227
228 res = -ENOMEM;
229 task = sas_create_task(cmd, dev, GFP_ATOMIC);
230 if (!task)
231 goto out;
232
233 cmd->scsi_done = scsi_done;
234 /* Queue up, Direct Mode or Task Collector Mode. */
235 if (sas_ha->lldd_max_execute_num < 2)
236 res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
237 else
238 res = sas_queue_up(task);
239
240 /* Examine */
241 if (res) {
242 SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
243 ASSIGN_SAS_TASK(cmd, NULL);
244 sas_free_task(task);
245 if (res == -SAS_QUEUE_FULL) {
246 cmd->result = DID_SOFT_ERROR << 16; /* retry */
247 res = 0;
248 scsi_done(cmd);
249 }
250 goto out;
251 }
252 }
253 out:
254 spin_lock_irq(host->host_lock);
255 return res;
256 }
257
258 static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd)
259 {
260 struct scsi_cmnd *cmd, *n;
261
262 list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
263 if (cmd == my_cmd)
264 list_del_init(&cmd->eh_entry);
265 }
266 }
267
268 static void sas_scsi_clear_queue_I_T(struct list_head *error_q,
269 struct domain_device *dev)
270 {
271 struct scsi_cmnd *cmd, *n;
272
273 list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
274 struct domain_device *x = cmd_to_domain_dev(cmd);
275
276 if (x == dev)
277 list_del_init(&cmd->eh_entry);
278 }
279 }
280
281 static void sas_scsi_clear_queue_port(struct list_head *error_q,
282 struct asd_sas_port *port)
283 {
284 struct scsi_cmnd *cmd, *n;
285
286 list_for_each_entry_safe(cmd, n, error_q, eh_entry) {
287 struct domain_device *dev = cmd_to_domain_dev(cmd);
288 struct asd_sas_port *x = dev->port;
289
290 if (x == port)
291 list_del_init(&cmd->eh_entry);
292 }
293 }
294
295 enum task_disposition {
296 TASK_IS_DONE,
297 TASK_IS_ABORTED,
298 TASK_IS_AT_LU,
299 TASK_IS_NOT_AT_LU,
300 TASK_ABORT_FAILED,
301 };
302
303 static enum task_disposition sas_scsi_find_task(struct sas_task *task)
304 {
305 struct sas_ha_struct *ha = task->dev->port->ha;
306 unsigned long flags;
307 int i, res;
308 struct sas_internal *si =
309 to_sas_internal(task->dev->port->ha->core.shost->transportt);
310
311 if (ha->lldd_max_execute_num > 1) {
312 struct scsi_core *core = &ha->core;
313 struct sas_task *t, *n;
314
315 spin_lock_irqsave(&core->task_queue_lock, flags);
316 list_for_each_entry_safe(t, n, &core->task_queue, list) {
317 if (task == t) {
318 list_del_init(&t->list);
319 spin_unlock_irqrestore(&core->task_queue_lock,
320 flags);
321 SAS_DPRINTK("%s: task 0x%p aborted from "
322 "task_queue\n",
323 __FUNCTION__, task);
324 return TASK_IS_ABORTED;
325 }
326 }
327 spin_unlock_irqrestore(&core->task_queue_lock, flags);
328 }
329
330 for (i = 0; i < 5; i++) {
331 SAS_DPRINTK("%s: aborting task 0x%p\n", __FUNCTION__, task);
332 res = si->dft->lldd_abort_task(task);
333
334 spin_lock_irqsave(&task->task_state_lock, flags);
335 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
336 spin_unlock_irqrestore(&task->task_state_lock, flags);
337 SAS_DPRINTK("%s: task 0x%p is done\n", __FUNCTION__,
338 task);
339 return TASK_IS_DONE;
340 }
341 spin_unlock_irqrestore(&task->task_state_lock, flags);
342
343 if (res == TMF_RESP_FUNC_COMPLETE) {
344 SAS_DPRINTK("%s: task 0x%p is aborted\n",
345 __FUNCTION__, task);
346 return TASK_IS_ABORTED;
347 } else if (si->dft->lldd_query_task) {
348 SAS_DPRINTK("%s: querying task 0x%p\n",
349 __FUNCTION__, task);
350 res = si->dft->lldd_query_task(task);
351 switch (res) {
352 case TMF_RESP_FUNC_SUCC:
353 SAS_DPRINTK("%s: task 0x%p at LU\n",
354 __FUNCTION__, task);
355 return TASK_IS_AT_LU;
356 case TMF_RESP_FUNC_COMPLETE:
357 SAS_DPRINTK("%s: task 0x%p not at LU\n",
358 __FUNCTION__, task);
359 return TASK_IS_NOT_AT_LU;
360 case TMF_RESP_FUNC_FAILED:
361 SAS_DPRINTK("%s: task 0x%p failed to abort\n",
362 __FUNCTION__, task);
363 return TASK_ABORT_FAILED;
364 }
365
366 }
367 }
368 return res;
369 }
370
371 static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd)
372 {
373 int res = TMF_RESP_FUNC_FAILED;
374 struct scsi_lun lun;
375 struct sas_internal *i =
376 to_sas_internal(dev->port->ha->core.shost->transportt);
377
378 int_to_scsilun(cmd->device->lun, &lun);
379
380 SAS_DPRINTK("eh: device %llx LUN %x has the task\n",
381 SAS_ADDR(dev->sas_addr),
382 cmd->device->lun);
383
384 if (i->dft->lldd_abort_task_set)
385 res = i->dft->lldd_abort_task_set(dev, lun.scsi_lun);
386
387 if (res == TMF_RESP_FUNC_FAILED) {
388 if (i->dft->lldd_clear_task_set)
389 res = i->dft->lldd_clear_task_set(dev, lun.scsi_lun);
390 }
391
392 if (res == TMF_RESP_FUNC_FAILED) {
393 if (i->dft->lldd_lu_reset)
394 res = i->dft->lldd_lu_reset(dev, lun.scsi_lun);
395 }
396
397 return res;
398 }
399
400 static int sas_recover_I_T(struct domain_device *dev)
401 {
402 int res = TMF_RESP_FUNC_FAILED;
403 struct sas_internal *i =
404 to_sas_internal(dev->port->ha->core.shost->transportt);
405
406 SAS_DPRINTK("I_T nexus reset for dev %016llx\n",
407 SAS_ADDR(dev->sas_addr));
408
409 if (i->dft->lldd_I_T_nexus_reset)
410 res = i->dft->lldd_I_T_nexus_reset(dev);
411
412 return res;
413 }
414
415 /* Find the sas_phy that's attached to this device */
416 struct sas_phy *find_local_sas_phy(struct domain_device *dev)
417 {
418 struct domain_device *pdev = dev->parent;
419 struct ex_phy *exphy = NULL;
420 int i;
421
422 /* Directly attached device */
423 if (!pdev)
424 return dev->port->phy;
425
426 /* Otherwise look in the expander */
427 for (i = 0; i < pdev->ex_dev.num_phys; i++)
428 if (!memcmp(dev->sas_addr,
429 pdev->ex_dev.ex_phy[i].attached_sas_addr,
430 SAS_ADDR_SIZE)) {
431 exphy = &pdev->ex_dev.ex_phy[i];
432 break;
433 }
434
435 BUG_ON(!exphy);
436 return exphy->phy;
437 }
438
439 /* Attempt to send a LUN reset message to a device */
440 int sas_eh_device_reset_handler(struct scsi_cmnd *cmd)
441 {
442 struct domain_device *dev = cmd_to_domain_dev(cmd);
443 struct sas_internal *i =
444 to_sas_internal(dev->port->ha->core.shost->transportt);
445 struct scsi_lun lun;
446 int res;
447
448 int_to_scsilun(cmd->device->lun, &lun);
449
450 if (!i->dft->lldd_lu_reset)
451 return FAILED;
452
453 res = i->dft->lldd_lu_reset(dev, lun.scsi_lun);
454 if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE)
455 return SUCCESS;
456
457 return FAILED;
458 }
459
460 /* Attempt to send a phy (bus) reset */
461 int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd)
462 {
463 struct domain_device *dev = cmd_to_domain_dev(cmd);
464 struct sas_phy *phy = find_local_sas_phy(dev);
465 int res;
466
467 res = sas_phy_reset(phy, 1);
468 if (res)
469 SAS_DPRINTK("Bus reset of %s failed 0x%x\n",
470 phy->dev.kobj.k_name,
471 res);
472 if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE)
473 return SUCCESS;
474
475 return FAILED;
476 }
477
478 /* Try to reset a device */
479 static int try_to_reset_cmd_device(struct Scsi_Host *shost,
480 struct scsi_cmnd *cmd)
481 {
482 int res;
483
484 if (!shost->hostt->eh_device_reset_handler)
485 goto try_bus_reset;
486
487 res = shost->hostt->eh_device_reset_handler(cmd);
488 if (res == SUCCESS)
489 return res;
490
491 try_bus_reset:
492 if (shost->hostt->eh_bus_reset_handler)
493 return shost->hostt->eh_bus_reset_handler(cmd);
494
495 return FAILED;
496 }
497
498 static int sas_eh_handle_sas_errors(struct Scsi_Host *shost,
499 struct list_head *work_q,
500 struct list_head *done_q)
501 {
502 struct scsi_cmnd *cmd, *n;
503 enum task_disposition res = TASK_IS_DONE;
504 int tmf_resp, need_reset;
505 struct sas_internal *i = to_sas_internal(shost->transportt);
506 unsigned long flags;
507 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
508
509 Again:
510 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
511 struct sas_task *task = TO_SAS_TASK(cmd);
512
513 if (!task)
514 continue;
515
516 list_del_init(&cmd->eh_entry);
517
518 spin_lock_irqsave(&task->task_state_lock, flags);
519 need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET;
520 spin_unlock_irqrestore(&task->task_state_lock, flags);
521
522 SAS_DPRINTK("trying to find task 0x%p\n", task);
523 res = sas_scsi_find_task(task);
524
525 cmd->eh_eflags = 0;
526
527 switch (res) {
528 case TASK_IS_DONE:
529 SAS_DPRINTK("%s: task 0x%p is done\n", __FUNCTION__,
530 task);
531 task->task_done(task);
532 if (need_reset)
533 try_to_reset_cmd_device(shost, cmd);
534 continue;
535 case TASK_IS_ABORTED:
536 SAS_DPRINTK("%s: task 0x%p is aborted\n",
537 __FUNCTION__, task);
538 task->task_done(task);
539 if (need_reset)
540 try_to_reset_cmd_device(shost, cmd);
541 continue;
542 case TASK_IS_AT_LU:
543 SAS_DPRINTK("task 0x%p is at LU: lu recover\n", task);
544 tmf_resp = sas_recover_lu(task->dev, cmd);
545 if (tmf_resp == TMF_RESP_FUNC_COMPLETE) {
546 SAS_DPRINTK("dev %016llx LU %x is "
547 "recovered\n",
548 SAS_ADDR(task->dev),
549 cmd->device->lun);
550 task->task_done(task);
551 if (need_reset)
552 try_to_reset_cmd_device(shost, cmd);
553 sas_scsi_clear_queue_lu(work_q, cmd);
554 goto Again;
555 }
556 /* fallthrough */
557 case TASK_IS_NOT_AT_LU:
558 case TASK_ABORT_FAILED:
559 SAS_DPRINTK("task 0x%p is not at LU: I_T recover\n",
560 task);
561 tmf_resp = sas_recover_I_T(task->dev);
562 if (tmf_resp == TMF_RESP_FUNC_COMPLETE) {
563 SAS_DPRINTK("I_T %016llx recovered\n",
564 SAS_ADDR(task->dev->sas_addr));
565 task->task_done(task);
566 if (need_reset)
567 try_to_reset_cmd_device(shost, cmd);
568 sas_scsi_clear_queue_I_T(work_q, task->dev);
569 goto Again;
570 }
571 /* Hammer time :-) */
572 if (i->dft->lldd_clear_nexus_port) {
573 struct asd_sas_port *port = task->dev->port;
574 SAS_DPRINTK("clearing nexus for port:%d\n",
575 port->id);
576 res = i->dft->lldd_clear_nexus_port(port);
577 if (res == TMF_RESP_FUNC_COMPLETE) {
578 SAS_DPRINTK("clear nexus port:%d "
579 "succeeded\n", port->id);
580 task->task_done(task);
581 if (need_reset)
582 try_to_reset_cmd_device(shost, cmd);
583 sas_scsi_clear_queue_port(work_q,
584 port);
585 goto Again;
586 }
587 }
588 if (i->dft->lldd_clear_nexus_ha) {
589 SAS_DPRINTK("clear nexus ha\n");
590 res = i->dft->lldd_clear_nexus_ha(ha);
591 if (res == TMF_RESP_FUNC_COMPLETE) {
592 SAS_DPRINTK("clear nexus ha "
593 "succeeded\n");
594 task->task_done(task);
595 if (need_reset)
596 try_to_reset_cmd_device(shost, cmd);
597 goto out;
598 }
599 }
600 /* If we are here -- this means that no amount
601 * of effort could recover from errors. Quite
602 * possibly the HA just disappeared.
603 */
604 SAS_DPRINTK("error from device %llx, LUN %x "
605 "couldn't be recovered in any way\n",
606 SAS_ADDR(task->dev->sas_addr),
607 cmd->device->lun);
608
609 task->task_done(task);
610 if (need_reset)
611 try_to_reset_cmd_device(shost, cmd);
612 goto clear_q;
613 }
614 }
615 out:
616 return list_empty(work_q);
617 clear_q:
618 SAS_DPRINTK("--- Exit %s -- clear_q\n", __FUNCTION__);
619 list_for_each_entry_safe(cmd, n, work_q, eh_entry) {
620 struct sas_task *task = TO_SAS_TASK(cmd);
621 list_del_init(&cmd->eh_entry);
622 task->task_done(task);
623 }
624 return list_empty(work_q);
625 }
626
627 void sas_scsi_recover_host(struct Scsi_Host *shost)
628 {
629 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
630 unsigned long flags;
631 LIST_HEAD(eh_work_q);
632
633 spin_lock_irqsave(shost->host_lock, flags);
634 list_splice_init(&shost->eh_cmd_q, &eh_work_q);
635 spin_unlock_irqrestore(shost->host_lock, flags);
636
637 SAS_DPRINTK("Enter %s\n", __FUNCTION__);
638 /*
639 * Deal with commands that still have SAS tasks (i.e. they didn't
640 * complete via the normal sas_task completion mechanism)
641 */
642 if (sas_eh_handle_sas_errors(shost, &eh_work_q, &ha->eh_done_q))
643 goto out;
644
645 /*
646 * Now deal with SCSI commands that completed ok but have a an error
647 * code (and hopefully sense data) attached. This is roughly what
648 * scsi_unjam_host does, but we skip scsi_eh_abort_cmds because any
649 * command we see here has no sas_task and is thus unknown to the HA.
650 */
651 if (!scsi_eh_get_sense(&eh_work_q, &ha->eh_done_q))
652 scsi_eh_ready_devs(shost, &eh_work_q, &ha->eh_done_q);
653
654 out:
655 scsi_eh_flush_done_q(&ha->eh_done_q);
656 SAS_DPRINTK("--- Exit %s\n", __FUNCTION__);
657 return;
658 }
659
660 enum scsi_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd)
661 {
662 struct sas_task *task = TO_SAS_TASK(cmd);
663 unsigned long flags;
664
665 if (!task) {
666 cmd->timeout_per_command /= 2;
667 SAS_DPRINTK("command 0x%p, task 0x%p, gone: %s\n",
668 cmd, task, (cmd->timeout_per_command ?
669 "EH_RESET_TIMER" : "EH_NOT_HANDLED"));
670 if (!cmd->timeout_per_command)
671 return EH_NOT_HANDLED;
672 return EH_RESET_TIMER;
673 }
674
675 spin_lock_irqsave(&task->task_state_lock, flags);
676 BUG_ON(task->task_state_flags & SAS_TASK_STATE_ABORTED);
677 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
678 spin_unlock_irqrestore(&task->task_state_lock, flags);
679 SAS_DPRINTK("command 0x%p, task 0x%p, timed out: EH_HANDLED\n",
680 cmd, task);
681 return EH_HANDLED;
682 }
683 if (!(task->task_state_flags & SAS_TASK_AT_INITIATOR)) {
684 spin_unlock_irqrestore(&task->task_state_lock, flags);
685 SAS_DPRINTK("command 0x%p, task 0x%p, not at initiator: "
686 "EH_RESET_TIMER\n",
687 cmd, task);
688 return EH_RESET_TIMER;
689 }
690 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
691 spin_unlock_irqrestore(&task->task_state_lock, flags);
692
693 SAS_DPRINTK("command 0x%p, task 0x%p, timed out: EH_NOT_HANDLED\n",
694 cmd, task);
695
696 return EH_NOT_HANDLED;
697 }
698
699
700 static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
701 {
702 /* Cheesy attempt to translate SAS errors into ATA. Hah! */
703
704 /* transport error */
705 if (ts->resp == SAS_TASK_UNDELIVERED)
706 return AC_ERR_ATA_BUS;
707
708 /* ts->resp == SAS_TASK_COMPLETE */
709 /* task delivered, what happened afterwards? */
710 switch (ts->stat) {
711 case SAS_DEV_NO_RESPONSE:
712 return AC_ERR_TIMEOUT;
713
714 case SAS_INTERRUPTED:
715 case SAS_PHY_DOWN:
716 case SAS_NAK_R_ERR:
717 return AC_ERR_ATA_BUS;
718
719
720 case SAS_DATA_UNDERRUN:
721 /*
722 * Some programs that use the taskfile interface
723 * (smartctl in particular) can cause underrun
724 * problems. Ignore these errors, perhaps at our
725 * peril.
726 */
727 return 0;
728
729 case SAS_DATA_OVERRUN:
730 case SAS_QUEUE_FULL:
731 case SAS_DEVICE_UNKNOWN:
732 case SAS_SG_ERR:
733 return AC_ERR_INVALID;
734
735 case SAM_CHECK_COND:
736 case SAS_OPEN_TO:
737 case SAS_OPEN_REJECT:
738 case SAS_PROTO_RESPONSE:
739 SAS_DPRINTK("%s: Saw error %d. What to do?\n",
740 __FUNCTION__, ts->stat);
741 return AC_ERR_OTHER;
742
743 case SAS_ABORTED_TASK:
744 return AC_ERR_DEV;
745
746 default:
747 return 0;
748 }
749 }
750
751 static void sas_ata_task_done(struct sas_task *task)
752 {
753 struct ata_queued_cmd *qc = task->uldd_task;
754 struct domain_device *dev = qc->ap->private_data;
755 struct task_status_struct *stat = &task->task_status;
756 struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
757 enum ata_completion_errors ac;
758
759 ac = sas_to_ata_err(stat);
760 if (ac) {
761 SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__, stat->stat);
762 /* We saw a SAS error. Send a vague error. */
763 qc->err_mask = ac;
764 dev->sata_dev.tf.feature = 0x04; /* status err */
765 dev->sata_dev.tf.command = ATA_ERR;
766 goto end;
767 }
768
769 ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
770 qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
771 dev->sata_dev.sstatus = resp->sstatus;
772 dev->sata_dev.serror = resp->serror;
773 dev->sata_dev.scontrol = resp->scontrol;
774 dev->sata_dev.ap->sactive = resp->sactive;
775 end:
776 ata_qc_complete(qc);
777 list_del_init(&task->list);
778 sas_free_task(task);
779 }
780
781 int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
782 {
783 struct domain_device *dev = sdev_to_domain_dev(sdev);
784
785 if (dev_is_sata(dev))
786 return ata_scsi_ioctl(sdev, cmd, arg);
787
788 return -EINVAL;
789 }
790
791 static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
792 {
793 int res = -ENOMEM;
794 struct sas_task *task;
795 struct domain_device *dev = qc->ap->private_data;
796 struct sas_ha_struct *sas_ha = dev->port->ha;
797 struct Scsi_Host *host = sas_ha->core.shost;
798 struct sas_internal *i = to_sas_internal(host->transportt);
799 struct scatterlist *sg;
800 unsigned int num = 0;
801 unsigned int xfer = 0;
802
803 task = sas_alloc_task(GFP_ATOMIC);
804 if (!task)
805 goto out;
806 task->dev = dev;
807 task->task_proto = SAS_PROTOCOL_STP;
808 task->task_done = sas_ata_task_done;
809
810 ata_tf_to_fis(&qc->tf, (u8*)&task->ata_task.fis, 0);
811 task->uldd_task = qc;
812 if (is_atapi_taskfile(&qc->tf)) {
813 memcpy(task->ata_task.atapi_packet, qc->cdb, ATAPI_CDB_LEN);
814 task->total_xfer_len = qc->nbytes + qc->pad_len;
815 task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem;
816 } else {
817 ata_for_each_sg(sg, qc) {
818 num++;
819 xfer += sg->length;
820 }
821
822 task->total_xfer_len = xfer;
823 task->num_scatter = num;
824 }
825
826 task->data_dir = qc->dma_dir;
827 task->scatter = qc->__sg;
828 task->ata_task.retry_count = 1;
829 task->task_state_flags = SAS_TASK_STATE_PENDING;
830
831 if (qc->tf.protocol == ATA_PROT_DMA)
832 task->ata_task.dma_xfer = 1;
833
834 if (sas_ha->lldd_max_execute_num < 2)
835 res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
836 else
837 res = sas_queue_up(task);
838
839 /* Examine */
840 if (res) {
841 SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
842
843 sas_free_task(task);
844 if (res == -SAS_QUEUE_FULL)
845 return -ENOMEM;
846 }
847
848 out:
849 return res;
850 }
851
852 static u8 sas_ata_check_status(struct ata_port *ap)
853 {
854 struct domain_device *dev = ap->private_data;
855 return dev->sata_dev.tf.command;
856 }
857
858 static void sas_ata_phy_reset(struct ata_port *ap)
859 {
860 struct domain_device *dev = ap->private_data;
861 struct sas_internal *i =
862 to_sas_internal(dev->port->ha->core.shost->transportt);
863 int res = 0;
864
865 if (i->dft->lldd_I_T_nexus_reset)
866 res = i->dft->lldd_I_T_nexus_reset(dev);
867
868 if (res)
869 SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__);
870
871 switch (dev->sata_dev.command_set) {
872 case ATA_COMMAND_SET:
873 SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
874 ap->device[0].class = ATA_DEV_ATA;
875 break;
876 case ATAPI_COMMAND_SET:
877 SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
878 ap->device[0].class = ATA_DEV_ATAPI;
879 break;
880 default:
881 SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
882 __FUNCTION__,
883 dev->sata_dev.command_set);
884 ap->device[0].class = ATA_DEV_ATA;
885 break;
886 }
887
888 ap->cbl = ATA_CBL_SATA;
889 }
890
891 static void sas_ata_post_internal(struct ata_queued_cmd *qc)
892 {
893 if (qc->flags & ATA_QCFLAG_FAILED)
894 qc->err_mask |= AC_ERR_OTHER;
895
896 if (qc->err_mask)
897 SAS_DPRINTK("%s: Failure; reset phy!\n", __FUNCTION__);
898 }
899
900 static void sas_ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
901 {
902 struct domain_device *dev = ap->private_data;
903 memcpy(tf, &dev->sata_dev.tf, sizeof (*tf));
904 }
905
906 static void sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
907 u32 val)
908 {
909 struct domain_device *dev = ap->private_data;
910
911 SAS_DPRINTK("STUB %s\n", __FUNCTION__);
912 switch (sc_reg_in) {
913 case SCR_STATUS:
914 dev->sata_dev.sstatus = val;
915 break;
916 case SCR_CONTROL:
917 dev->sata_dev.scontrol = val;
918 break;
919 case SCR_ERROR:
920 dev->sata_dev.serror = val;
921 break;
922 case SCR_ACTIVE:
923 dev->sata_dev.ap->sactive = val;
924 break;
925 }
926 }
927
928 static u32 sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
929 {
930 struct domain_device *dev = ap->private_data;
931
932 SAS_DPRINTK("STUB %s\n", __FUNCTION__);
933 switch (sc_reg_in) {
934 case SCR_STATUS:
935 return dev->sata_dev.sstatus;
936 case SCR_CONTROL:
937 return dev->sata_dev.scontrol;
938 case SCR_ERROR:
939 return dev->sata_dev.serror;
940 case SCR_ACTIVE:
941 return dev->sata_dev.ap->sactive;
942 default:
943 return 0xffffffffU;
944 }
945 }
946
947 static struct ata_port_operations sas_sata_ops = {
948 .port_disable = ata_port_disable,
949 .check_status = sas_ata_check_status,
950 .check_altstatus = sas_ata_check_status,
951 .dev_select = ata_noop_dev_select,
952 .phy_reset = sas_ata_phy_reset,
953 .post_internal_cmd = sas_ata_post_internal,
954 .tf_read = sas_ata_tf_read,
955 .qc_prep = ata_noop_qc_prep,
956 .qc_issue = sas_ata_qc_issue,
957 .port_start = ata_sas_port_start,
958 .port_stop = ata_sas_port_stop,
959 .scr_read = sas_ata_scr_read,
960 .scr_write = sas_ata_scr_write
961 };
962
963 static struct ata_port_info sata_port_info = {
964 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET |
965 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA,
966 .pio_mask = 0x1f, /* PIO0-4 */
967 .mwdma_mask = 0x07, /* MWDMA0-2 */
968 .udma_mask = ATA_UDMA6,
969 .port_ops = &sas_sata_ops
970 };
971
972 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy)
973 {
974 struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent);
975 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
976 struct domain_device *found_dev = NULL;
977 int i;
978 unsigned long flags;
979
980 spin_lock_irqsave(&ha->phy_port_lock, flags);
981 for (i = 0; i < ha->num_phys; i++) {
982 struct asd_sas_port *port = ha->sas_port[i];
983 struct domain_device *dev;
984
985 spin_lock(&port->dev_list_lock);
986 list_for_each_entry(dev, &port->dev_list, dev_list_node) {
987 if (rphy == dev->rphy) {
988 found_dev = dev;
989 spin_unlock(&port->dev_list_lock);
990 goto found;
991 }
992 }
993 spin_unlock(&port->dev_list_lock);
994 }
995 found:
996 spin_unlock_irqrestore(&ha->phy_port_lock, flags);
997
998 return found_dev;
999 }
1000
1001 static inline struct domain_device *sas_find_target(struct scsi_target *starget)
1002 {
1003 struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent);
1004
1005 return sas_find_dev_by_rphy(rphy);
1006 }
1007
1008 int sas_target_alloc(struct scsi_target *starget)
1009 {
1010 struct Scsi_Host *shost = dev_to_shost(&starget->dev);
1011 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
1012 struct domain_device *found_dev = sas_find_target(starget);
1013
1014 if (!found_dev)
1015 return -ENODEV;
1016
1017 if (dev_is_sata(found_dev)) {
1018 struct ata_port *ap;
1019
1020 ata_host_init(&found_dev->sata_dev.ata_host,
1021 &ha->pcidev->dev,
1022 sata_port_info.flags,
1023 &sas_sata_ops);
1024 ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
1025 &sata_port_info,
1026 shost);
1027 if (!ap) {
1028 SAS_DPRINTK("ata_sas_port_alloc failed.\n");
1029 return -ENODEV;
1030 }
1031
1032 ap->private_data = found_dev;
1033 ap->cbl = ATA_CBL_SATA;
1034 found_dev->sata_dev.ap = ap;
1035 }
1036
1037 starget->hostdata = found_dev;
1038 return 0;
1039 }
1040
1041 #define SAS_DEF_QD 32
1042 #define SAS_MAX_QD 64
1043
1044 int sas_slave_configure(struct scsi_device *scsi_dev)
1045 {
1046 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
1047 struct sas_ha_struct *sas_ha;
1048
1049 BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE);
1050
1051 if (dev_is_sata(dev)) {
1052 ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap);
1053 return 0;
1054 }
1055
1056 sas_ha = dev->port->ha;
1057
1058 sas_read_port_mode_page(scsi_dev);
1059
1060 if (scsi_dev->tagged_supported) {
1061 scsi_set_tag_type(scsi_dev, MSG_SIMPLE_TAG);
1062 scsi_activate_tcq(scsi_dev, SAS_DEF_QD);
1063 } else {
1064 SAS_DPRINTK("device %llx, LUN %x doesn't support "
1065 "TCQ\n", SAS_ADDR(dev->sas_addr),
1066 scsi_dev->lun);
1067 scsi_dev->tagged_supported = 0;
1068 scsi_set_tag_type(scsi_dev, 0);
1069 scsi_deactivate_tcq(scsi_dev, 1);
1070 }
1071
1072 scsi_dev->allow_restart = 1;
1073
1074 return 0;
1075 }
1076
1077 void sas_slave_destroy(struct scsi_device *scsi_dev)
1078 {
1079 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
1080
1081 if (dev_is_sata(dev))
1082 ata_port_disable(dev->sata_dev.ap);
1083 }
1084
1085 int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth)
1086 {
1087 int res = min(new_depth, SAS_MAX_QD);
1088
1089 if (scsi_dev->tagged_supported)
1090 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev),
1091 res);
1092 else {
1093 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
1094 sas_printk("device %llx LUN %x queue depth changed to 1\n",
1095 SAS_ADDR(dev->sas_addr),
1096 scsi_dev->lun);
1097 scsi_adjust_queue_depth(scsi_dev, 0, 1);
1098 res = 1;
1099 }
1100
1101 return res;
1102 }
1103
1104 int sas_change_queue_type(struct scsi_device *scsi_dev, int qt)
1105 {
1106 if (!scsi_dev->tagged_supported)
1107 return 0;
1108
1109 scsi_deactivate_tcq(scsi_dev, 1);
1110
1111 scsi_set_tag_type(scsi_dev, qt);
1112 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
1113
1114 return qt;
1115 }
1116
1117 int sas_bios_param(struct scsi_device *scsi_dev,
1118 struct block_device *bdev,
1119 sector_t capacity, int *hsc)
1120 {
1121 hsc[0] = 255;
1122 hsc[1] = 63;
1123 sector_div(capacity, 255*63);
1124 hsc[2] = capacity;
1125
1126 return 0;
1127 }
1128
1129 /* ---------- Task Collector Thread implementation ---------- */
1130
1131 static void sas_queue(struct sas_ha_struct *sas_ha)
1132 {
1133 struct scsi_core *core = &sas_ha->core;
1134 unsigned long flags;
1135 LIST_HEAD(q);
1136 int can_queue;
1137 int res;
1138 struct sas_internal *i = to_sas_internal(core->shost->transportt);
1139
1140 spin_lock_irqsave(&core->task_queue_lock, flags);
1141 while (!kthread_should_stop() &&
1142 !list_empty(&core->task_queue)) {
1143
1144 can_queue = sas_ha->lldd_queue_size - core->task_queue_size;
1145 if (can_queue >= 0) {
1146 can_queue = core->task_queue_size;
1147 list_splice_init(&core->task_queue, &q);
1148 } else {
1149 struct list_head *a, *n;
1150
1151 can_queue = sas_ha->lldd_queue_size;
1152 list_for_each_safe(a, n, &core->task_queue) {
1153 list_move_tail(a, &q);
1154 if (--can_queue == 0)
1155 break;
1156 }
1157 can_queue = sas_ha->lldd_queue_size;
1158 }
1159 core->task_queue_size -= can_queue;
1160 spin_unlock_irqrestore(&core->task_queue_lock, flags);
1161 {
1162 struct sas_task *task = list_entry(q.next,
1163 struct sas_task,
1164 list);
1165 list_del_init(&q);
1166 res = i->dft->lldd_execute_task(task, can_queue,
1167 GFP_KERNEL);
1168 if (unlikely(res))
1169 __list_add(&q, task->list.prev, &task->list);
1170 }
1171 spin_lock_irqsave(&core->task_queue_lock, flags);
1172 if (res) {
1173 list_splice_init(&q, &core->task_queue); /*at head*/
1174 core->task_queue_size += can_queue;
1175 }
1176 }
1177 spin_unlock_irqrestore(&core->task_queue_lock, flags);
1178 }
1179
1180 /**
1181 * sas_queue_thread -- The Task Collector thread
1182 * @_sas_ha: pointer to struct sas_ha
1183 */
1184 static int sas_queue_thread(void *_sas_ha)
1185 {
1186 struct sas_ha_struct *sas_ha = _sas_ha;
1187
1188 while (1) {
1189 set_current_state(TASK_INTERRUPTIBLE);
1190 schedule();
1191 sas_queue(sas_ha);
1192 if (kthread_should_stop())
1193 break;
1194 }
1195
1196 return 0;
1197 }
1198
1199 int sas_init_queue(struct sas_ha_struct *sas_ha)
1200 {
1201 struct scsi_core *core = &sas_ha->core;
1202
1203 spin_lock_init(&core->task_queue_lock);
1204 core->task_queue_size = 0;
1205 INIT_LIST_HEAD(&core->task_queue);
1206
1207 core->queue_thread = kthread_run(sas_queue_thread, sas_ha,
1208 "sas_queue_%d", core->shost->host_no);
1209 if (IS_ERR(core->queue_thread))
1210 return PTR_ERR(core->queue_thread);
1211 return 0;
1212 }
1213
1214 void sas_shutdown_queue(struct sas_ha_struct *sas_ha)
1215 {
1216 unsigned long flags;
1217 struct scsi_core *core = &sas_ha->core;
1218 struct sas_task *task, *n;
1219
1220 kthread_stop(core->queue_thread);
1221
1222 if (!list_empty(&core->task_queue))
1223 SAS_DPRINTK("HA: %llx: scsi core task queue is NOT empty!?\n",
1224 SAS_ADDR(sas_ha->sas_addr));
1225
1226 spin_lock_irqsave(&core->task_queue_lock, flags);
1227 list_for_each_entry_safe(task, n, &core->task_queue, list) {
1228 struct scsi_cmnd *cmd = task->uldd_task;
1229
1230 list_del_init(&task->list);
1231
1232 ASSIGN_SAS_TASK(cmd, NULL);
1233 sas_free_task(task);
1234 cmd->result = DID_ABORT << 16;
1235 cmd->scsi_done(cmd);
1236 }
1237 spin_unlock_irqrestore(&core->task_queue_lock, flags);
1238 }
1239
1240 /*
1241 * Call the LLDD task abort routine directly. This function is intended for
1242 * use by upper layers that need to tell the LLDD to abort a task.
1243 */
1244 int __sas_task_abort(struct sas_task *task)
1245 {
1246 struct sas_internal *si =
1247 to_sas_internal(task->dev->port->ha->core.shost->transportt);
1248 unsigned long flags;
1249 int res;
1250
1251 spin_lock_irqsave(&task->task_state_lock, flags);
1252 if (task->task_state_flags & SAS_TASK_STATE_ABORTED ||
1253 task->task_state_flags & SAS_TASK_STATE_DONE) {
1254 spin_unlock_irqrestore(&task->task_state_lock, flags);
1255 SAS_DPRINTK("%s: Task %p already finished.\n", __FUNCTION__,
1256 task);
1257 return 0;
1258 }
1259 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1260 spin_unlock_irqrestore(&task->task_state_lock, flags);
1261
1262 if (!si->dft->lldd_abort_task)
1263 return -ENODEV;
1264
1265 res = si->dft->lldd_abort_task(task);
1266
1267 spin_lock_irqsave(&task->task_state_lock, flags);
1268 if ((task->task_state_flags & SAS_TASK_STATE_DONE) ||
1269 (res == TMF_RESP_FUNC_COMPLETE))
1270 {
1271 spin_unlock_irqrestore(&task->task_state_lock, flags);
1272 task->task_done(task);
1273 return 0;
1274 }
1275
1276 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
1277 task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
1278 spin_unlock_irqrestore(&task->task_state_lock, flags);
1279
1280 return -EAGAIN;
1281 }
1282
1283 /*
1284 * Tell an upper layer that it needs to initiate an abort for a given task.
1285 * This should only ever be called by an LLDD.
1286 */
1287 void sas_task_abort(struct sas_task *task)
1288 {
1289 struct scsi_cmnd *sc = task->uldd_task;
1290
1291 /* Escape for libsas internal commands */
1292 if (!sc) {
1293 if (!del_timer(&task->timer))
1294 return;
1295 task->timer.function(task->timer.data);
1296 return;
1297 }
1298
1299 scsi_req_abort_cmd(sc);
1300 scsi_schedule_eh(sc->device->host);
1301 }
1302
1303 int sas_slave_alloc(struct scsi_device *scsi_dev)
1304 {
1305 struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
1306
1307 if (dev_is_sata(dev))
1308 return ata_sas_port_init(dev->sata_dev.ap);
1309
1310 return 0;
1311 }
1312
1313 void sas_target_destroy(struct scsi_target *starget)
1314 {
1315 struct domain_device *found_dev = sas_find_target(starget);
1316
1317 if (!found_dev)
1318 return;
1319
1320 if (dev_is_sata(found_dev))
1321 ata_sas_port_destroy(found_dev->sata_dev.ap);
1322
1323 return;
1324 }
1325
1326 EXPORT_SYMBOL_GPL(sas_queuecommand);
1327 EXPORT_SYMBOL_GPL(sas_target_alloc);
1328 EXPORT_SYMBOL_GPL(sas_slave_configure);
1329 EXPORT_SYMBOL_GPL(sas_slave_destroy);
1330 EXPORT_SYMBOL_GPL(sas_change_queue_depth);
1331 EXPORT_SYMBOL_GPL(sas_change_queue_type);
1332 EXPORT_SYMBOL_GPL(sas_bios_param);
1333 EXPORT_SYMBOL_GPL(__sas_task_abort);
1334 EXPORT_SYMBOL_GPL(sas_task_abort);
1335 EXPORT_SYMBOL_GPL(sas_phy_reset);
1336 EXPORT_SYMBOL_GPL(sas_phy_enable);
1337 EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler);
1338 EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler);
1339 EXPORT_SYMBOL_GPL(sas_slave_alloc);
1340 EXPORT_SYMBOL_GPL(sas_target_destroy);
1341 EXPORT_SYMBOL_GPL(sas_ioctl);
Support for the Chinese Samsung S3C2440 based development boards