1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Serial Attached SCSI (SAS) class SCSI Host glue. |
4 | * |
5 | * Copyright (C) 2005 Adaptec, Inc. All rights reserved. |
6 | * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com> |
7 | */ |
8 | |
9 | #include <linux/kthread.h> |
10 | #include <linux/firmware.h> |
11 | #include <linux/export.h> |
12 | #include <linux/ctype.h> |
13 | #include <linux/kernel.h> |
14 | |
15 | #include "sas_internal.h" |
16 | |
17 | #include <scsi/scsi_host.h> |
18 | #include <scsi/scsi_device.h> |
19 | #include <scsi/scsi_tcq.h> |
20 | #include <scsi/scsi.h> |
21 | #include <scsi/scsi_eh.h> |
22 | #include <scsi/scsi_transport.h> |
23 | #include <scsi/scsi_transport_sas.h> |
24 | #include <scsi/sas_ata.h> |
25 | #include "scsi_sas_internal.h" |
26 | #include "scsi_transport_api.h" |
27 | #include "scsi_priv.h" |
28 | |
29 | #include <linux/err.h> |
30 | #include <linux/blkdev.h> |
31 | #include <linux/freezer.h> |
32 | #include <linux/gfp.h> |
33 | #include <linux/scatterlist.h> |
34 | #include <linux/libata.h> |
35 | |
36 | /* record final status and free the task */ |
37 | static void sas_end_task(struct scsi_cmnd *sc, struct sas_task *task) |
38 | { |
39 | struct task_status_struct *ts = &task->task_status; |
40 | enum scsi_host_status hs = DID_OK; |
41 | enum exec_status stat = SAS_SAM_STAT_GOOD; |
42 | |
43 | if (ts->resp == SAS_TASK_UNDELIVERED) { |
44 | /* transport error */ |
45 | hs = DID_NO_CONNECT; |
46 | } else { /* ts->resp == SAS_TASK_COMPLETE */ |
47 | /* task delivered, what happened afterwards? */ |
48 | switch (ts->stat) { |
49 | case SAS_DEV_NO_RESPONSE: |
50 | case SAS_INTERRUPTED: |
51 | case SAS_PHY_DOWN: |
52 | case SAS_NAK_R_ERR: |
53 | case SAS_OPEN_TO: |
54 | hs = DID_NO_CONNECT; |
55 | break; |
56 | case SAS_DATA_UNDERRUN: |
57 | scsi_set_resid(cmd: sc, resid: ts->residual); |
58 | if (scsi_bufflen(cmd: sc) - scsi_get_resid(cmd: sc) < sc->underflow) |
59 | hs = DID_ERROR; |
60 | break; |
61 | case SAS_DATA_OVERRUN: |
62 | hs = DID_ERROR; |
63 | break; |
64 | case SAS_QUEUE_FULL: |
65 | hs = DID_SOFT_ERROR; /* retry */ |
66 | break; |
67 | case SAS_DEVICE_UNKNOWN: |
68 | hs = DID_BAD_TARGET; |
69 | break; |
70 | case SAS_OPEN_REJECT: |
71 | if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY) |
72 | hs = DID_SOFT_ERROR; /* retry */ |
73 | else |
74 | hs = DID_ERROR; |
75 | break; |
76 | case SAS_PROTO_RESPONSE: |
77 | pr_notice("LLDD:%s sent SAS_PROTO_RESP for an SSP task; please report this\n" , |
78 | task->dev->port->ha->sas_ha_name); |
79 | break; |
80 | case SAS_ABORTED_TASK: |
81 | hs = DID_ABORT; |
82 | break; |
83 | case SAS_SAM_STAT_CHECK_CONDITION: |
84 | memcpy(sc->sense_buffer, ts->buf, |
85 | min(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size)); |
86 | stat = SAS_SAM_STAT_CHECK_CONDITION; |
87 | break; |
88 | default: |
89 | stat = ts->stat; |
90 | break; |
91 | } |
92 | } |
93 | |
94 | sc->result = (hs << 16) | stat; |
95 | ASSIGN_SAS_TASK(sc, NULL); |
96 | sas_free_task(task); |
97 | } |
98 | |
99 | static void sas_scsi_task_done(struct sas_task *task) |
100 | { |
101 | struct scsi_cmnd *sc = task->uldd_task; |
102 | struct domain_device *dev = task->dev; |
103 | struct sas_ha_struct *ha = dev->port->ha; |
104 | unsigned long flags; |
105 | |
106 | spin_lock_irqsave(&dev->done_lock, flags); |
107 | if (test_bit(SAS_HA_FROZEN, &ha->state)) |
108 | task = NULL; |
109 | else |
110 | ASSIGN_SAS_TASK(sc, NULL); |
111 | spin_unlock_irqrestore(lock: &dev->done_lock, flags); |
112 | |
113 | if (unlikely(!task)) { |
114 | /* task will be completed by the error handler */ |
115 | pr_debug("task done but aborted\n" ); |
116 | return; |
117 | } |
118 | |
119 | if (unlikely(!sc)) { |
120 | pr_debug("task_done called with non existing SCSI cmnd!\n" ); |
121 | sas_free_task(task); |
122 | return; |
123 | } |
124 | |
125 | sas_end_task(sc, task); |
126 | scsi_done(cmd: sc); |
127 | } |
128 | |
129 | static struct sas_task *sas_create_task(struct scsi_cmnd *cmd, |
130 | struct domain_device *dev, |
131 | gfp_t gfp_flags) |
132 | { |
133 | struct sas_task *task = sas_alloc_task(flags: gfp_flags); |
134 | struct scsi_lun lun; |
135 | |
136 | if (!task) |
137 | return NULL; |
138 | |
139 | task->uldd_task = cmd; |
140 | ASSIGN_SAS_TASK(cmd, task); |
141 | |
142 | task->dev = dev; |
143 | task->task_proto = task->dev->tproto; /* BUG_ON(!SSP) */ |
144 | |
145 | int_to_scsilun(cmd->device->lun, &lun); |
146 | memcpy(task->ssp_task.LUN, &lun.scsi_lun, 8); |
147 | task->ssp_task.task_attr = TASK_ATTR_SIMPLE; |
148 | task->ssp_task.cmd = cmd; |
149 | |
150 | task->scatter = scsi_sglist(cmd); |
151 | task->num_scatter = scsi_sg_count(cmd); |
152 | task->total_xfer_len = scsi_bufflen(cmd); |
153 | task->data_dir = cmd->sc_data_direction; |
154 | |
155 | task->task_done = sas_scsi_task_done; |
156 | |
157 | return task; |
158 | } |
159 | |
160 | int sas_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) |
161 | { |
162 | struct sas_internal *i = to_sas_internal(host->transportt); |
163 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
164 | struct sas_task *task; |
165 | int res = 0; |
166 | |
167 | /* If the device fell off, no sense in issuing commands */ |
168 | if (test_bit(SAS_DEV_GONE, &dev->state)) { |
169 | cmd->result = DID_BAD_TARGET << 16; |
170 | goto out_done; |
171 | } |
172 | |
173 | if (dev_is_sata(dev)) { |
174 | spin_lock_irq(lock: dev->sata_dev.ap->lock); |
175 | res = ata_sas_queuecmd(cmd, ap: dev->sata_dev.ap); |
176 | spin_unlock_irq(lock: dev->sata_dev.ap->lock); |
177 | return res; |
178 | } |
179 | |
180 | task = sas_create_task(cmd, dev, GFP_ATOMIC); |
181 | if (!task) |
182 | return SCSI_MLQUEUE_HOST_BUSY; |
183 | |
184 | res = i->dft->lldd_execute_task(task, GFP_ATOMIC); |
185 | if (res) |
186 | goto out_free_task; |
187 | return 0; |
188 | |
189 | out_free_task: |
190 | pr_debug("lldd_execute_task returned: %d\n" , res); |
191 | ASSIGN_SAS_TASK(cmd, NULL); |
192 | sas_free_task(task); |
193 | if (res == -SAS_QUEUE_FULL) |
194 | cmd->result = DID_SOFT_ERROR << 16; /* retry */ |
195 | else |
196 | cmd->result = DID_ERROR << 16; |
197 | out_done: |
198 | scsi_done(cmd); |
199 | return 0; |
200 | } |
201 | EXPORT_SYMBOL_GPL(sas_queuecommand); |
202 | |
203 | static void sas_eh_finish_cmd(struct scsi_cmnd *cmd) |
204 | { |
205 | struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(cmd->device->host); |
206 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
207 | struct sas_task *task = TO_SAS_TASK(cmd); |
208 | |
209 | /* At this point, we only get called following an actual abort |
210 | * of the task, so we should be guaranteed not to be racing with |
211 | * any completions from the LLD. Task is freed after this. |
212 | */ |
213 | sas_end_task(sc: cmd, task); |
214 | |
215 | if (dev_is_sata(dev)) { |
216 | /* defer commands to libata so that libata EH can |
217 | * handle ata qcs correctly |
218 | */ |
219 | list_move_tail(list: &cmd->eh_entry, head: &sas_ha->eh_ata_q); |
220 | return; |
221 | } |
222 | |
223 | /* now finish the command and move it on to the error |
224 | * handler done list, this also takes it off the |
225 | * error handler pending list. |
226 | */ |
227 | scsi_eh_finish_cmd(scmd: cmd, done_q: &sas_ha->eh_done_q); |
228 | } |
229 | |
230 | static void sas_scsi_clear_queue_lu(struct list_head *error_q, struct scsi_cmnd *my_cmd) |
231 | { |
232 | struct scsi_cmnd *cmd, *n; |
233 | |
234 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { |
235 | if (cmd->device->sdev_target == my_cmd->device->sdev_target && |
236 | cmd->device->lun == my_cmd->device->lun) |
237 | sas_eh_finish_cmd(cmd); |
238 | } |
239 | } |
240 | |
241 | static void sas_scsi_clear_queue_I_T(struct list_head *error_q, |
242 | struct domain_device *dev) |
243 | { |
244 | struct scsi_cmnd *cmd, *n; |
245 | |
246 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { |
247 | struct domain_device *x = cmd_to_domain_dev(cmd); |
248 | |
249 | if (x == dev) |
250 | sas_eh_finish_cmd(cmd); |
251 | } |
252 | } |
253 | |
254 | static void sas_scsi_clear_queue_port(struct list_head *error_q, |
255 | struct asd_sas_port *port) |
256 | { |
257 | struct scsi_cmnd *cmd, *n; |
258 | |
259 | list_for_each_entry_safe(cmd, n, error_q, eh_entry) { |
260 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
261 | struct asd_sas_port *x = dev->port; |
262 | |
263 | if (x == port) |
264 | sas_eh_finish_cmd(cmd); |
265 | } |
266 | } |
267 | |
268 | enum task_disposition { |
269 | TASK_IS_DONE, |
270 | TASK_IS_ABORTED, |
271 | TASK_IS_AT_LU, |
272 | TASK_IS_NOT_AT_LU, |
273 | TASK_ABORT_FAILED, |
274 | }; |
275 | |
276 | static enum task_disposition sas_scsi_find_task(struct sas_task *task) |
277 | { |
278 | unsigned long flags; |
279 | int i, res; |
280 | struct sas_internal *si = |
281 | to_sas_internal(task->dev->port->ha->shost->transportt); |
282 | |
283 | for (i = 0; i < 5; i++) { |
284 | pr_notice("%s: aborting task 0x%p\n" , __func__, task); |
285 | res = si->dft->lldd_abort_task(task); |
286 | |
287 | spin_lock_irqsave(&task->task_state_lock, flags); |
288 | if (task->task_state_flags & SAS_TASK_STATE_DONE) { |
289 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
290 | pr_debug("%s: task 0x%p is done\n" , __func__, task); |
291 | return TASK_IS_DONE; |
292 | } |
293 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
294 | |
295 | if (res == TMF_RESP_FUNC_COMPLETE) { |
296 | pr_notice("%s: task 0x%p is aborted\n" , |
297 | __func__, task); |
298 | return TASK_IS_ABORTED; |
299 | } else if (si->dft->lldd_query_task) { |
300 | pr_notice("%s: querying task 0x%p\n" , __func__, task); |
301 | res = si->dft->lldd_query_task(task); |
302 | switch (res) { |
303 | case TMF_RESP_FUNC_SUCC: |
304 | pr_notice("%s: task 0x%p at LU\n" , __func__, |
305 | task); |
306 | return TASK_IS_AT_LU; |
307 | case TMF_RESP_FUNC_COMPLETE: |
308 | pr_notice("%s: task 0x%p not at LU\n" , |
309 | __func__, task); |
310 | return TASK_IS_NOT_AT_LU; |
311 | case TMF_RESP_FUNC_FAILED: |
312 | pr_notice("%s: task 0x%p failed to abort\n" , |
313 | __func__, task); |
314 | return TASK_ABORT_FAILED; |
315 | default: |
316 | pr_notice("%s: task 0x%p result code %d not handled\n" , |
317 | __func__, task, res); |
318 | } |
319 | } |
320 | } |
321 | return TASK_ABORT_FAILED; |
322 | } |
323 | |
324 | static int sas_recover_lu(struct domain_device *dev, struct scsi_cmnd *cmd) |
325 | { |
326 | int res = TMF_RESP_FUNC_FAILED; |
327 | struct scsi_lun lun; |
328 | struct sas_internal *i = |
329 | to_sas_internal(dev->port->ha->shost->transportt); |
330 | |
331 | int_to_scsilun(cmd->device->lun, &lun); |
332 | |
333 | pr_notice("eh: device %016llx LUN 0x%llx has the task\n" , |
334 | SAS_ADDR(dev->sas_addr), |
335 | cmd->device->lun); |
336 | |
337 | if (i->dft->lldd_abort_task_set) |
338 | res = i->dft->lldd_abort_task_set(dev, lun.scsi_lun); |
339 | |
340 | if (res == TMF_RESP_FUNC_FAILED) { |
341 | if (i->dft->lldd_clear_task_set) |
342 | res = i->dft->lldd_clear_task_set(dev, lun.scsi_lun); |
343 | } |
344 | |
345 | if (res == TMF_RESP_FUNC_FAILED) { |
346 | if (i->dft->lldd_lu_reset) |
347 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); |
348 | } |
349 | |
350 | return res; |
351 | } |
352 | |
353 | static int sas_recover_I_T(struct domain_device *dev) |
354 | { |
355 | int res = TMF_RESP_FUNC_FAILED; |
356 | struct sas_internal *i = |
357 | to_sas_internal(dev->port->ha->shost->transportt); |
358 | |
359 | pr_notice("I_T nexus reset for dev %016llx\n" , |
360 | SAS_ADDR(dev->sas_addr)); |
361 | |
362 | if (i->dft->lldd_I_T_nexus_reset) |
363 | res = i->dft->lldd_I_T_nexus_reset(dev); |
364 | |
365 | return res; |
366 | } |
367 | |
368 | /* take a reference on the last known good phy for this device */ |
369 | struct sas_phy *sas_get_local_phy(struct domain_device *dev) |
370 | { |
371 | struct sas_ha_struct *ha = dev->port->ha; |
372 | struct sas_phy *phy; |
373 | unsigned long flags; |
374 | |
375 | /* a published domain device always has a valid phy, it may be |
376 | * stale, but it is never NULL |
377 | */ |
378 | BUG_ON(!dev->phy); |
379 | |
380 | spin_lock_irqsave(&ha->phy_port_lock, flags); |
381 | phy = dev->phy; |
382 | get_device(dev: &phy->dev); |
383 | spin_unlock_irqrestore(lock: &ha->phy_port_lock, flags); |
384 | |
385 | return phy; |
386 | } |
387 | EXPORT_SYMBOL_GPL(sas_get_local_phy); |
388 | |
389 | static int sas_queue_reset(struct domain_device *dev, int reset_type, u64 lun) |
390 | { |
391 | struct sas_ha_struct *ha = dev->port->ha; |
392 | int scheduled = 0, tries = 100; |
393 | |
394 | /* ata: promote lun reset to bus reset */ |
395 | if (dev_is_sata(dev)) { |
396 | sas_ata_schedule_reset(dev); |
397 | return SUCCESS; |
398 | } |
399 | |
400 | while (!scheduled && tries--) { |
401 | spin_lock_irq(lock: &ha->lock); |
402 | if (!test_bit(SAS_DEV_EH_PENDING, &dev->state) && |
403 | !test_bit(reset_type, &dev->state)) { |
404 | scheduled = 1; |
405 | ha->eh_active++; |
406 | list_add_tail(new: &dev->ssp_dev.eh_list_node, head: &ha->eh_dev_q); |
407 | set_bit(nr: SAS_DEV_EH_PENDING, addr: &dev->state); |
408 | set_bit(nr: reset_type, addr: &dev->state); |
409 | int_to_scsilun(lun, &dev->ssp_dev.reset_lun); |
410 | scsi_schedule_eh(shost: ha->shost); |
411 | } |
412 | spin_unlock_irq(lock: &ha->lock); |
413 | |
414 | if (scheduled) |
415 | return SUCCESS; |
416 | } |
417 | |
418 | pr_warn("%s reset of %s failed\n" , |
419 | reset_type == SAS_DEV_LU_RESET ? "LUN" : "Bus" , |
420 | dev_name(&dev->rphy->dev)); |
421 | |
422 | return FAILED; |
423 | } |
424 | |
425 | int sas_eh_abort_handler(struct scsi_cmnd *cmd) |
426 | { |
427 | int res = TMF_RESP_FUNC_FAILED; |
428 | struct sas_task *task = TO_SAS_TASK(cmd); |
429 | struct Scsi_Host *host = cmd->device->host; |
430 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
431 | struct sas_internal *i = to_sas_internal(host->transportt); |
432 | unsigned long flags; |
433 | |
434 | if (!i->dft->lldd_abort_task) |
435 | return FAILED; |
436 | |
437 | spin_lock_irqsave(host->host_lock, flags); |
438 | /* We cannot do async aborts for SATA devices */ |
439 | if (dev_is_sata(dev) && !host->host_eh_scheduled) { |
440 | spin_unlock_irqrestore(lock: host->host_lock, flags); |
441 | return FAILED; |
442 | } |
443 | spin_unlock_irqrestore(lock: host->host_lock, flags); |
444 | |
445 | if (task) |
446 | res = i->dft->lldd_abort_task(task); |
447 | else |
448 | pr_notice("no task to abort\n" ); |
449 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) |
450 | return SUCCESS; |
451 | |
452 | return FAILED; |
453 | } |
454 | EXPORT_SYMBOL_GPL(sas_eh_abort_handler); |
455 | |
456 | /* Attempt to send a LUN reset message to a device */ |
457 | int sas_eh_device_reset_handler(struct scsi_cmnd *cmd) |
458 | { |
459 | int res; |
460 | struct scsi_lun lun; |
461 | struct Scsi_Host *host = cmd->device->host; |
462 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
463 | struct sas_internal *i = to_sas_internal(host->transportt); |
464 | |
465 | if (current != host->ehandler) |
466 | return sas_queue_reset(dev, reset_type: SAS_DEV_LU_RESET, lun: cmd->device->lun); |
467 | |
468 | int_to_scsilun(cmd->device->lun, &lun); |
469 | |
470 | if (!i->dft->lldd_lu_reset) |
471 | return FAILED; |
472 | |
473 | res = i->dft->lldd_lu_reset(dev, lun.scsi_lun); |
474 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE) |
475 | return SUCCESS; |
476 | |
477 | return FAILED; |
478 | } |
479 | EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler); |
480 | |
481 | int sas_eh_target_reset_handler(struct scsi_cmnd *cmd) |
482 | { |
483 | int res; |
484 | struct Scsi_Host *host = cmd->device->host; |
485 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
486 | struct sas_internal *i = to_sas_internal(host->transportt); |
487 | |
488 | if (current != host->ehandler) |
489 | return sas_queue_reset(dev, reset_type: SAS_DEV_RESET, lun: 0); |
490 | |
491 | if (!i->dft->lldd_I_T_nexus_reset) |
492 | return FAILED; |
493 | |
494 | res = i->dft->lldd_I_T_nexus_reset(dev); |
495 | if (res == TMF_RESP_FUNC_SUCC || res == TMF_RESP_FUNC_COMPLETE || |
496 | res == -ENODEV) |
497 | return SUCCESS; |
498 | |
499 | return FAILED; |
500 | } |
501 | EXPORT_SYMBOL_GPL(sas_eh_target_reset_handler); |
502 | |
503 | /* Try to reset a device */ |
504 | static int try_to_reset_cmd_device(struct scsi_cmnd *cmd) |
505 | { |
506 | int res; |
507 | struct Scsi_Host *shost = cmd->device->host; |
508 | |
509 | if (!shost->hostt->eh_device_reset_handler) |
510 | goto try_target_reset; |
511 | |
512 | res = shost->hostt->eh_device_reset_handler(cmd); |
513 | if (res == SUCCESS) |
514 | return res; |
515 | |
516 | try_target_reset: |
517 | if (shost->hostt->eh_target_reset_handler) |
518 | return shost->hostt->eh_target_reset_handler(cmd); |
519 | |
520 | return FAILED; |
521 | } |
522 | |
523 | static void sas_eh_handle_sas_errors(struct Scsi_Host *shost, struct list_head *work_q) |
524 | { |
525 | struct scsi_cmnd *cmd, *n; |
526 | enum task_disposition res = TASK_IS_DONE; |
527 | int tmf_resp, need_reset; |
528 | struct sas_internal *i = to_sas_internal(shost->transportt); |
529 | unsigned long flags; |
530 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); |
531 | LIST_HEAD(done); |
532 | |
533 | /* clean out any commands that won the completion vs eh race */ |
534 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
535 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
536 | struct sas_task *task; |
537 | |
538 | spin_lock_irqsave(&dev->done_lock, flags); |
539 | /* by this point the lldd has either observed |
540 | * SAS_HA_FROZEN and is leaving the task alone, or has |
541 | * won the race with eh and decided to complete it |
542 | */ |
543 | task = TO_SAS_TASK(cmd); |
544 | spin_unlock_irqrestore(lock: &dev->done_lock, flags); |
545 | |
546 | if (!task) |
547 | list_move_tail(list: &cmd->eh_entry, head: &done); |
548 | } |
549 | |
550 | Again: |
551 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
552 | struct sas_task *task = TO_SAS_TASK(cmd); |
553 | |
554 | list_del_init(entry: &cmd->eh_entry); |
555 | |
556 | spin_lock_irqsave(&task->task_state_lock, flags); |
557 | need_reset = task->task_state_flags & SAS_TASK_NEED_DEV_RESET; |
558 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
559 | |
560 | if (need_reset) { |
561 | pr_notice("%s: task 0x%p requests reset\n" , |
562 | __func__, task); |
563 | goto reset; |
564 | } |
565 | |
566 | pr_debug("trying to find task 0x%p\n" , task); |
567 | res = sas_scsi_find_task(task); |
568 | |
569 | switch (res) { |
570 | case TASK_IS_DONE: |
571 | pr_notice("%s: task 0x%p is done\n" , __func__, |
572 | task); |
573 | sas_eh_finish_cmd(cmd); |
574 | continue; |
575 | case TASK_IS_ABORTED: |
576 | pr_notice("%s: task 0x%p is aborted\n" , |
577 | __func__, task); |
578 | sas_eh_finish_cmd(cmd); |
579 | continue; |
580 | case TASK_IS_AT_LU: |
581 | pr_info("task 0x%p is at LU: lu recover\n" , task); |
582 | reset: |
583 | tmf_resp = sas_recover_lu(dev: task->dev, cmd); |
584 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE) { |
585 | pr_notice("dev %016llx LU 0x%llx is recovered\n" , |
586 | SAS_ADDR(task->dev), |
587 | cmd->device->lun); |
588 | sas_eh_finish_cmd(cmd); |
589 | sas_scsi_clear_queue_lu(error_q: work_q, my_cmd: cmd); |
590 | goto Again; |
591 | } |
592 | fallthrough; |
593 | case TASK_IS_NOT_AT_LU: |
594 | case TASK_ABORT_FAILED: |
595 | pr_notice("task 0x%p is not at LU: I_T recover\n" , |
596 | task); |
597 | tmf_resp = sas_recover_I_T(dev: task->dev); |
598 | if (tmf_resp == TMF_RESP_FUNC_COMPLETE || |
599 | tmf_resp == -ENODEV) { |
600 | struct domain_device *dev = task->dev; |
601 | pr_notice("I_T %016llx recovered\n" , |
602 | SAS_ADDR(task->dev->sas_addr)); |
603 | sas_eh_finish_cmd(cmd); |
604 | sas_scsi_clear_queue_I_T(error_q: work_q, dev); |
605 | goto Again; |
606 | } |
607 | /* Hammer time :-) */ |
608 | try_to_reset_cmd_device(cmd); |
609 | if (i->dft->lldd_clear_nexus_port) { |
610 | struct asd_sas_port *port = task->dev->port; |
611 | pr_debug("clearing nexus for port:%d\n" , |
612 | port->id); |
613 | res = i->dft->lldd_clear_nexus_port(port); |
614 | if (res == TMF_RESP_FUNC_COMPLETE) { |
615 | pr_notice("clear nexus port:%d succeeded\n" , |
616 | port->id); |
617 | sas_eh_finish_cmd(cmd); |
618 | sas_scsi_clear_queue_port(error_q: work_q, |
619 | port); |
620 | goto Again; |
621 | } |
622 | } |
623 | if (i->dft->lldd_clear_nexus_ha) { |
624 | pr_debug("clear nexus ha\n" ); |
625 | res = i->dft->lldd_clear_nexus_ha(ha); |
626 | if (res == TMF_RESP_FUNC_COMPLETE) { |
627 | pr_notice("clear nexus ha succeeded\n" ); |
628 | sas_eh_finish_cmd(cmd); |
629 | goto clear_q; |
630 | } |
631 | } |
632 | /* If we are here -- this means that no amount |
633 | * of effort could recover from errors. Quite |
634 | * possibly the HA just disappeared. |
635 | */ |
636 | pr_err("error from device %016llx, LUN 0x%llx couldn't be recovered in any way\n" , |
637 | SAS_ADDR(task->dev->sas_addr), |
638 | cmd->device->lun); |
639 | |
640 | sas_eh_finish_cmd(cmd); |
641 | goto clear_q; |
642 | } |
643 | } |
644 | out: |
645 | list_splice_tail(list: &done, head: work_q); |
646 | list_splice_tail_init(list: &ha->eh_ata_q, head: work_q); |
647 | return; |
648 | |
649 | clear_q: |
650 | pr_debug("--- Exit %s -- clear_q\n" , __func__); |
651 | list_for_each_entry_safe(cmd, n, work_q, eh_entry) |
652 | sas_eh_finish_cmd(cmd); |
653 | goto out; |
654 | } |
655 | |
656 | static void sas_eh_handle_resets(struct Scsi_Host *shost) |
657 | { |
658 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); |
659 | struct sas_internal *i = to_sas_internal(shost->transportt); |
660 | |
661 | /* handle directed resets to sas devices */ |
662 | spin_lock_irq(lock: &ha->lock); |
663 | while (!list_empty(head: &ha->eh_dev_q)) { |
664 | struct domain_device *dev; |
665 | struct ssp_device *ssp; |
666 | |
667 | ssp = list_entry(ha->eh_dev_q.next, typeof(*ssp), eh_list_node); |
668 | list_del_init(entry: &ssp->eh_list_node); |
669 | dev = container_of(ssp, typeof(*dev), ssp_dev); |
670 | kref_get(kref: &dev->kref); |
671 | WARN_ONCE(dev_is_sata(dev), "ssp reset to ata device?\n" ); |
672 | |
673 | spin_unlock_irq(lock: &ha->lock); |
674 | |
675 | if (test_and_clear_bit(nr: SAS_DEV_LU_RESET, addr: &dev->state)) |
676 | i->dft->lldd_lu_reset(dev, ssp->reset_lun.scsi_lun); |
677 | |
678 | if (test_and_clear_bit(nr: SAS_DEV_RESET, addr: &dev->state)) |
679 | i->dft->lldd_I_T_nexus_reset(dev); |
680 | |
681 | sas_put_device(dev); |
682 | spin_lock_irq(lock: &ha->lock); |
683 | clear_bit(nr: SAS_DEV_EH_PENDING, addr: &dev->state); |
684 | ha->eh_active--; |
685 | } |
686 | spin_unlock_irq(lock: &ha->lock); |
687 | } |
688 | |
689 | |
690 | void sas_scsi_recover_host(struct Scsi_Host *shost) |
691 | { |
692 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); |
693 | LIST_HEAD(eh_work_q); |
694 | int tries = 0; |
695 | bool retry; |
696 | |
697 | retry: |
698 | tries++; |
699 | retry = true; |
700 | spin_lock_irq(lock: shost->host_lock); |
701 | list_splice_init(list: &shost->eh_cmd_q, head: &eh_work_q); |
702 | spin_unlock_irq(lock: shost->host_lock); |
703 | |
704 | pr_notice("Enter %s busy: %d failed: %d\n" , |
705 | __func__, scsi_host_busy(shost), shost->host_failed); |
706 | /* |
707 | * Deal with commands that still have SAS tasks (i.e. they didn't |
708 | * complete via the normal sas_task completion mechanism), |
709 | * SAS_HA_FROZEN gives eh dominion over all sas_task completion. |
710 | */ |
711 | set_bit(nr: SAS_HA_FROZEN, addr: &ha->state); |
712 | sas_eh_handle_sas_errors(shost, work_q: &eh_work_q); |
713 | clear_bit(nr: SAS_HA_FROZEN, addr: &ha->state); |
714 | if (list_empty(head: &eh_work_q)) |
715 | goto out; |
716 | |
717 | /* |
718 | * Now deal with SCSI commands that completed ok but have a an error |
719 | * code (and hopefully sense data) attached. This is roughly what |
720 | * scsi_unjam_host does, but we skip scsi_eh_abort_cmds because any |
721 | * command we see here has no sas_task and is thus unknown to the HA. |
722 | */ |
723 | sas_ata_eh(shost, work_q: &eh_work_q); |
724 | if (!scsi_eh_get_sense(work_q: &eh_work_q, done_q: &ha->eh_done_q)) |
725 | scsi_eh_ready_devs(shost, work_q: &eh_work_q, done_q: &ha->eh_done_q); |
726 | |
727 | out: |
728 | sas_eh_handle_resets(shost); |
729 | |
730 | /* now link into libata eh --- if we have any ata devices */ |
731 | sas_ata_strategy_handler(shost); |
732 | |
733 | scsi_eh_flush_done_q(done_q: &ha->eh_done_q); |
734 | |
735 | /* check if any new eh work was scheduled during the last run */ |
736 | spin_lock_irq(lock: &ha->lock); |
737 | if (ha->eh_active == 0) { |
738 | shost->host_eh_scheduled = 0; |
739 | retry = false; |
740 | } |
741 | spin_unlock_irq(lock: &ha->lock); |
742 | |
743 | if (retry) |
744 | goto retry; |
745 | |
746 | pr_notice("--- Exit %s: busy: %d failed: %d tries: %d\n" , |
747 | __func__, scsi_host_busy(shost), |
748 | shost->host_failed, tries); |
749 | } |
750 | |
751 | int sas_ioctl(struct scsi_device *sdev, unsigned int cmd, void __user *arg) |
752 | { |
753 | struct domain_device *dev = sdev_to_domain_dev(sdev); |
754 | |
755 | if (dev_is_sata(dev)) |
756 | return ata_sas_scsi_ioctl(ap: dev->sata_dev.ap, dev: sdev, cmd, arg); |
757 | |
758 | return -EINVAL; |
759 | } |
760 | EXPORT_SYMBOL_GPL(sas_ioctl); |
761 | |
762 | struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy) |
763 | { |
764 | struct Scsi_Host *shost = dev_to_shost(dev: rphy->dev.parent); |
765 | struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); |
766 | struct domain_device *found_dev = NULL; |
767 | int i; |
768 | unsigned long flags; |
769 | |
770 | spin_lock_irqsave(&ha->phy_port_lock, flags); |
771 | for (i = 0; i < ha->num_phys; i++) { |
772 | struct asd_sas_port *port = ha->sas_port[i]; |
773 | struct domain_device *dev; |
774 | |
775 | spin_lock(lock: &port->dev_list_lock); |
776 | list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
777 | if (rphy == dev->rphy) { |
778 | found_dev = dev; |
779 | spin_unlock(lock: &port->dev_list_lock); |
780 | goto found; |
781 | } |
782 | } |
783 | spin_unlock(lock: &port->dev_list_lock); |
784 | } |
785 | found: |
786 | spin_unlock_irqrestore(lock: &ha->phy_port_lock, flags); |
787 | |
788 | return found_dev; |
789 | } |
790 | |
791 | int sas_target_alloc(struct scsi_target *starget) |
792 | { |
793 | struct sas_rphy *rphy = dev_to_rphy(starget->dev.parent); |
794 | struct domain_device *found_dev = sas_find_dev_by_rphy(rphy); |
795 | |
796 | if (!found_dev) |
797 | return -ENODEV; |
798 | |
799 | kref_get(kref: &found_dev->kref); |
800 | starget->hostdata = found_dev; |
801 | return 0; |
802 | } |
803 | EXPORT_SYMBOL_GPL(sas_target_alloc); |
804 | |
805 | #define SAS_DEF_QD 256 |
806 | |
807 | int sas_slave_configure(struct scsi_device *scsi_dev) |
808 | { |
809 | struct domain_device *dev = sdev_to_domain_dev(sdev: scsi_dev); |
810 | |
811 | BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE); |
812 | |
813 | if (dev_is_sata(dev)) { |
814 | ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap); |
815 | return 0; |
816 | } |
817 | |
818 | sas_read_port_mode_page(scsi_dev); |
819 | |
820 | if (scsi_dev->tagged_supported) { |
821 | scsi_change_queue_depth(scsi_dev, SAS_DEF_QD); |
822 | } else { |
823 | pr_notice("device %016llx, LUN 0x%llx doesn't support TCQ\n" , |
824 | SAS_ADDR(dev->sas_addr), scsi_dev->lun); |
825 | scsi_change_queue_depth(scsi_dev, 1); |
826 | } |
827 | |
828 | scsi_dev->allow_restart = 1; |
829 | |
830 | return 0; |
831 | } |
832 | EXPORT_SYMBOL_GPL(sas_slave_configure); |
833 | |
834 | int sas_change_queue_depth(struct scsi_device *sdev, int depth) |
835 | { |
836 | struct domain_device *dev = sdev_to_domain_dev(sdev); |
837 | |
838 | if (dev_is_sata(dev)) |
839 | return ata_change_queue_depth(ap: dev->sata_dev.ap, sdev, queue_depth: depth); |
840 | |
841 | if (!sdev->tagged_supported) |
842 | depth = 1; |
843 | return scsi_change_queue_depth(sdev, depth); |
844 | } |
845 | EXPORT_SYMBOL_GPL(sas_change_queue_depth); |
846 | |
847 | int sas_bios_param(struct scsi_device *scsi_dev, |
848 | struct block_device *bdev, |
849 | sector_t capacity, int *hsc) |
850 | { |
851 | hsc[0] = 255; |
852 | hsc[1] = 63; |
853 | sector_div(capacity, 255*63); |
854 | hsc[2] = capacity; |
855 | |
856 | return 0; |
857 | } |
858 | EXPORT_SYMBOL_GPL(sas_bios_param); |
859 | |
860 | void sas_task_internal_done(struct sas_task *task) |
861 | { |
862 | del_timer(timer: &task->slow_task->timer); |
863 | complete(&task->slow_task->completion); |
864 | } |
865 | |
866 | void sas_task_internal_timedout(struct timer_list *t) |
867 | { |
868 | struct sas_task_slow *slow = from_timer(slow, t, timer); |
869 | struct sas_task *task = slow->task; |
870 | bool is_completed = true; |
871 | unsigned long flags; |
872 | |
873 | spin_lock_irqsave(&task->task_state_lock, flags); |
874 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { |
875 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
876 | is_completed = false; |
877 | } |
878 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
879 | |
880 | if (!is_completed) |
881 | complete(&task->slow_task->completion); |
882 | } |
883 | |
884 | #define TASK_TIMEOUT (20 * HZ) |
885 | #define TASK_RETRY 3 |
886 | |
887 | static int sas_execute_internal_abort(struct domain_device *device, |
888 | enum sas_internal_abort type, u16 tag, |
889 | unsigned int qid, void *data) |
890 | { |
891 | struct sas_ha_struct *ha = device->port->ha; |
892 | struct sas_internal *i = to_sas_internal(ha->shost->transportt); |
893 | struct sas_task *task = NULL; |
894 | int res, retry; |
895 | |
896 | for (retry = 0; retry < TASK_RETRY; retry++) { |
897 | task = sas_alloc_slow_task(GFP_KERNEL); |
898 | if (!task) |
899 | return -ENOMEM; |
900 | |
901 | task->dev = device; |
902 | task->task_proto = SAS_PROTOCOL_INTERNAL_ABORT; |
903 | task->task_done = sas_task_internal_done; |
904 | task->slow_task->timer.function = sas_task_internal_timedout; |
905 | task->slow_task->timer.expires = jiffies + TASK_TIMEOUT; |
906 | add_timer(timer: &task->slow_task->timer); |
907 | |
908 | task->abort_task.tag = tag; |
909 | task->abort_task.type = type; |
910 | task->abort_task.qid = qid; |
911 | |
912 | res = i->dft->lldd_execute_task(task, GFP_KERNEL); |
913 | if (res) { |
914 | del_timer_sync(timer: &task->slow_task->timer); |
915 | pr_err("Executing internal abort failed %016llx (%d)\n" , |
916 | SAS_ADDR(device->sas_addr), res); |
917 | break; |
918 | } |
919 | |
920 | wait_for_completion(&task->slow_task->completion); |
921 | res = TMF_RESP_FUNC_FAILED; |
922 | |
923 | /* Even if the internal abort timed out, return direct. */ |
924 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
925 | bool quit = true; |
926 | |
927 | if (i->dft->lldd_abort_timeout) |
928 | quit = i->dft->lldd_abort_timeout(task, data); |
929 | else |
930 | pr_err("Internal abort: timeout %016llx\n" , |
931 | SAS_ADDR(device->sas_addr)); |
932 | res = -EIO; |
933 | if (quit) |
934 | break; |
935 | } |
936 | |
937 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
938 | task->task_status.stat == SAS_SAM_STAT_GOOD) { |
939 | res = TMF_RESP_FUNC_COMPLETE; |
940 | break; |
941 | } |
942 | |
943 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
944 | task->task_status.stat == TMF_RESP_FUNC_SUCC) { |
945 | res = TMF_RESP_FUNC_SUCC; |
946 | break; |
947 | } |
948 | |
949 | pr_err("Internal abort: task to dev %016llx response: 0x%x status 0x%x\n" , |
950 | SAS_ADDR(device->sas_addr), task->task_status.resp, |
951 | task->task_status.stat); |
952 | sas_free_task(task); |
953 | task = NULL; |
954 | } |
955 | BUG_ON(retry == TASK_RETRY && task != NULL); |
956 | sas_free_task(task); |
957 | return res; |
958 | } |
959 | |
960 | int sas_execute_internal_abort_single(struct domain_device *device, u16 tag, |
961 | unsigned int qid, void *data) |
962 | { |
963 | return sas_execute_internal_abort(device, type: SAS_INTERNAL_ABORT_SINGLE, |
964 | tag, qid, data); |
965 | } |
966 | EXPORT_SYMBOL_GPL(sas_execute_internal_abort_single); |
967 | |
968 | int sas_execute_internal_abort_dev(struct domain_device *device, |
969 | unsigned int qid, void *data) |
970 | { |
971 | return sas_execute_internal_abort(device, type: SAS_INTERNAL_ABORT_DEV, |
972 | SCSI_NO_TAG, qid, data); |
973 | } |
974 | EXPORT_SYMBOL_GPL(sas_execute_internal_abort_dev); |
975 | |
976 | int sas_execute_tmf(struct domain_device *device, void *parameter, |
977 | int para_len, int force_phy_id, |
978 | struct sas_tmf_task *tmf) |
979 | { |
980 | struct sas_task *task; |
981 | struct sas_internal *i = |
982 | to_sas_internal(device->port->ha->shost->transportt); |
983 | int res, retry; |
984 | |
985 | for (retry = 0; retry < TASK_RETRY; retry++) { |
986 | task = sas_alloc_slow_task(GFP_KERNEL); |
987 | if (!task) |
988 | return -ENOMEM; |
989 | |
990 | task->dev = device; |
991 | task->task_proto = device->tproto; |
992 | |
993 | if (dev_is_sata(dev: device)) { |
994 | task->ata_task.device_control_reg_update = 1; |
995 | if (force_phy_id >= 0) { |
996 | task->ata_task.force_phy = true; |
997 | task->ata_task.force_phy_id = force_phy_id; |
998 | } |
999 | memcpy(&task->ata_task.fis, parameter, para_len); |
1000 | } else { |
1001 | memcpy(&task->ssp_task, parameter, para_len); |
1002 | } |
1003 | |
1004 | task->task_done = sas_task_internal_done; |
1005 | task->tmf = tmf; |
1006 | |
1007 | task->slow_task->timer.function = sas_task_internal_timedout; |
1008 | task->slow_task->timer.expires = jiffies + TASK_TIMEOUT; |
1009 | add_timer(timer: &task->slow_task->timer); |
1010 | |
1011 | res = i->dft->lldd_execute_task(task, GFP_KERNEL); |
1012 | if (res) { |
1013 | del_timer_sync(timer: &task->slow_task->timer); |
1014 | pr_err("executing TMF task failed %016llx (%d)\n" , |
1015 | SAS_ADDR(device->sas_addr), res); |
1016 | break; |
1017 | } |
1018 | |
1019 | wait_for_completion(&task->slow_task->completion); |
1020 | |
1021 | if (i->dft->lldd_tmf_exec_complete) |
1022 | i->dft->lldd_tmf_exec_complete(device); |
1023 | |
1024 | res = TMF_RESP_FUNC_FAILED; |
1025 | |
1026 | if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { |
1027 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { |
1028 | pr_err("TMF task timeout for %016llx and not done\n" , |
1029 | SAS_ADDR(device->sas_addr)); |
1030 | if (i->dft->lldd_tmf_aborted) |
1031 | i->dft->lldd_tmf_aborted(task); |
1032 | break; |
1033 | } |
1034 | pr_warn("TMF task timeout for %016llx and done\n" , |
1035 | SAS_ADDR(device->sas_addr)); |
1036 | } |
1037 | |
1038 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
1039 | task->task_status.stat == TMF_RESP_FUNC_COMPLETE) { |
1040 | res = TMF_RESP_FUNC_COMPLETE; |
1041 | break; |
1042 | } |
1043 | |
1044 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
1045 | task->task_status.stat == TMF_RESP_FUNC_SUCC) { |
1046 | res = TMF_RESP_FUNC_SUCC; |
1047 | break; |
1048 | } |
1049 | |
1050 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
1051 | task->task_status.stat == SAS_DATA_UNDERRUN) { |
1052 | /* no error, but return the number of bytes of |
1053 | * underrun |
1054 | */ |
1055 | pr_warn("TMF task to dev %016llx resp: 0x%x sts 0x%x underrun\n" , |
1056 | SAS_ADDR(device->sas_addr), |
1057 | task->task_status.resp, |
1058 | task->task_status.stat); |
1059 | res = task->task_status.residual; |
1060 | break; |
1061 | } |
1062 | |
1063 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
1064 | task->task_status.stat == SAS_DATA_OVERRUN) { |
1065 | pr_warn("TMF task blocked task error %016llx\n" , |
1066 | SAS_ADDR(device->sas_addr)); |
1067 | res = -EMSGSIZE; |
1068 | break; |
1069 | } |
1070 | |
1071 | if (task->task_status.resp == SAS_TASK_COMPLETE && |
1072 | task->task_status.stat == SAS_OPEN_REJECT) { |
1073 | pr_warn("TMF task open reject failed %016llx\n" , |
1074 | SAS_ADDR(device->sas_addr)); |
1075 | res = -EIO; |
1076 | } else { |
1077 | pr_warn("TMF task to dev %016llx resp: 0x%x status 0x%x\n" , |
1078 | SAS_ADDR(device->sas_addr), |
1079 | task->task_status.resp, |
1080 | task->task_status.stat); |
1081 | } |
1082 | sas_free_task(task); |
1083 | task = NULL; |
1084 | } |
1085 | |
1086 | if (retry == TASK_RETRY) |
1087 | pr_warn("executing TMF for %016llx failed after %d attempts!\n" , |
1088 | SAS_ADDR(device->sas_addr), TASK_RETRY); |
1089 | sas_free_task(task); |
1090 | |
1091 | return res; |
1092 | } |
1093 | |
1094 | static int sas_execute_ssp_tmf(struct domain_device *device, u8 *lun, |
1095 | struct sas_tmf_task *tmf) |
1096 | { |
1097 | struct sas_ssp_task ssp_task; |
1098 | |
1099 | if (!(device->tproto & SAS_PROTOCOL_SSP)) |
1100 | return TMF_RESP_FUNC_ESUPP; |
1101 | |
1102 | memcpy(ssp_task.LUN, lun, 8); |
1103 | |
1104 | return sas_execute_tmf(device, parameter: &ssp_task, para_len: sizeof(ssp_task), force_phy_id: -1, tmf); |
1105 | } |
1106 | |
1107 | int sas_abort_task_set(struct domain_device *dev, u8 *lun) |
1108 | { |
1109 | struct sas_tmf_task tmf_task = { |
1110 | .tmf = TMF_ABORT_TASK_SET, |
1111 | }; |
1112 | |
1113 | return sas_execute_ssp_tmf(device: dev, lun, tmf: &tmf_task); |
1114 | } |
1115 | EXPORT_SYMBOL_GPL(sas_abort_task_set); |
1116 | |
1117 | int sas_clear_task_set(struct domain_device *dev, u8 *lun) |
1118 | { |
1119 | struct sas_tmf_task tmf_task = { |
1120 | .tmf = TMF_CLEAR_TASK_SET, |
1121 | }; |
1122 | |
1123 | return sas_execute_ssp_tmf(device: dev, lun, tmf: &tmf_task); |
1124 | } |
1125 | EXPORT_SYMBOL_GPL(sas_clear_task_set); |
1126 | |
1127 | int sas_lu_reset(struct domain_device *dev, u8 *lun) |
1128 | { |
1129 | struct sas_tmf_task tmf_task = { |
1130 | .tmf = TMF_LU_RESET, |
1131 | }; |
1132 | |
1133 | return sas_execute_ssp_tmf(device: dev, lun, tmf: &tmf_task); |
1134 | } |
1135 | EXPORT_SYMBOL_GPL(sas_lu_reset); |
1136 | |
1137 | int sas_query_task(struct sas_task *task, u16 tag) |
1138 | { |
1139 | struct sas_tmf_task tmf_task = { |
1140 | .tmf = TMF_QUERY_TASK, |
1141 | .tag_of_task_to_be_managed = tag, |
1142 | }; |
1143 | struct scsi_cmnd *cmnd = task->uldd_task; |
1144 | struct domain_device *dev = task->dev; |
1145 | struct scsi_lun lun; |
1146 | |
1147 | int_to_scsilun(cmnd->device->lun, &lun); |
1148 | |
1149 | return sas_execute_ssp_tmf(device: dev, lun: lun.scsi_lun, tmf: &tmf_task); |
1150 | } |
1151 | EXPORT_SYMBOL_GPL(sas_query_task); |
1152 | |
1153 | int sas_abort_task(struct sas_task *task, u16 tag) |
1154 | { |
1155 | struct sas_tmf_task tmf_task = { |
1156 | .tmf = TMF_ABORT_TASK, |
1157 | .tag_of_task_to_be_managed = tag, |
1158 | }; |
1159 | struct scsi_cmnd *cmnd = task->uldd_task; |
1160 | struct domain_device *dev = task->dev; |
1161 | struct scsi_lun lun; |
1162 | |
1163 | int_to_scsilun(cmnd->device->lun, &lun); |
1164 | |
1165 | return sas_execute_ssp_tmf(device: dev, lun: lun.scsi_lun, tmf: &tmf_task); |
1166 | } |
1167 | EXPORT_SYMBOL_GPL(sas_abort_task); |
1168 | |
1169 | /* |
1170 | * Tell an upper layer that it needs to initiate an abort for a given task. |
1171 | * This should only ever be called by an LLDD. |
1172 | */ |
1173 | void sas_task_abort(struct sas_task *task) |
1174 | { |
1175 | struct scsi_cmnd *sc = task->uldd_task; |
1176 | |
1177 | /* Escape for libsas internal commands */ |
1178 | if (!sc) { |
1179 | struct sas_task_slow *slow = task->slow_task; |
1180 | |
1181 | if (!slow) |
1182 | return; |
1183 | if (!del_timer(timer: &slow->timer)) |
1184 | return; |
1185 | slow->timer.function(&slow->timer); |
1186 | return; |
1187 | } |
1188 | |
1189 | if (dev_is_sata(dev: task->dev)) |
1190 | sas_ata_task_abort(task); |
1191 | else |
1192 | blk_abort_request(scsi_cmd_to_rq(scmd: sc)); |
1193 | } |
1194 | EXPORT_SYMBOL_GPL(sas_task_abort); |
1195 | |
1196 | int sas_slave_alloc(struct scsi_device *sdev) |
1197 | { |
1198 | if (dev_is_sata(dev: sdev_to_domain_dev(sdev)) && sdev->lun) |
1199 | return -ENXIO; |
1200 | |
1201 | return 0; |
1202 | } |
1203 | EXPORT_SYMBOL_GPL(sas_slave_alloc); |
1204 | |
1205 | void sas_target_destroy(struct scsi_target *starget) |
1206 | { |
1207 | struct domain_device *found_dev = starget->hostdata; |
1208 | |
1209 | if (!found_dev) |
1210 | return; |
1211 | |
1212 | starget->hostdata = NULL; |
1213 | sas_put_device(dev: found_dev); |
1214 | } |
1215 | EXPORT_SYMBOL_GPL(sas_target_destroy); |
1216 | |
1217 | #define SAS_STRING_ADDR_SIZE 16 |
1218 | |
1219 | int sas_request_addr(struct Scsi_Host *shost, u8 *addr) |
1220 | { |
1221 | int res; |
1222 | const struct firmware *fw; |
1223 | |
1224 | res = request_firmware(fw: &fw, name: "sas_addr" , device: &shost->shost_gendev); |
1225 | if (res) |
1226 | return res; |
1227 | |
1228 | if (fw->size < SAS_STRING_ADDR_SIZE) { |
1229 | res = -ENODEV; |
1230 | goto out; |
1231 | } |
1232 | |
1233 | res = hex2bin(dst: addr, src: fw->data, count: strnlen(p: fw->data, SAS_ADDR_SIZE * 2) / 2); |
1234 | if (res) |
1235 | goto out; |
1236 | |
1237 | out: |
1238 | release_firmware(fw); |
1239 | return res; |
1240 | } |
1241 | EXPORT_SYMBOL_GPL(sas_request_addr); |
1242 | |
1243 | |