1 | /* |
2 | * This file is provided under a dual BSD/GPLv2 license. When using or |
3 | * redistributing this file, you may do so under either license. |
4 | * |
5 | * GPL LICENSE SUMMARY |
6 | * |
7 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of version 2 of the GNU General Public License as |
11 | * published by the Free Software Foundation. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, but |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software |
20 | * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
21 | * The full GNU General Public License is included in this distribution |
22 | * in the file called LICENSE.GPL. |
23 | * |
24 | * BSD LICENSE |
25 | * |
26 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
27 | * All rights reserved. |
28 | * |
29 | * Redistribution and use in source and binary forms, with or without |
30 | * modification, are permitted provided that the following conditions |
31 | * are met: |
32 | * |
33 | * * Redistributions of source code must retain the above copyright |
34 | * notice, this list of conditions and the following disclaimer. |
35 | * * Redistributions in binary form must reproduce the above copyright |
36 | * notice, this list of conditions and the following disclaimer in |
37 | * the documentation and/or other materials provided with the |
38 | * distribution. |
39 | * * Neither the name of Intel Corporation nor the names of its |
40 | * contributors may be used to endorse or promote products derived |
41 | * from this software without specific prior written permission. |
42 | * |
43 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
44 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
45 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
46 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
47 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
48 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
49 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
50 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
51 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
52 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
53 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
54 | */ |
55 | |
56 | #include <linux/completion.h> |
57 | #include <linux/irqflags.h> |
58 | #include "sas.h" |
59 | #include <scsi/libsas.h> |
60 | #include "remote_device.h" |
61 | #include "remote_node_context.h" |
62 | #include "isci.h" |
63 | #include "request.h" |
64 | #include "task.h" |
65 | #include "host.h" |
66 | |
67 | /** |
68 | * isci_task_refuse() - complete the request to the upper layer driver in |
69 | * the case where an I/O needs to be completed back in the submit path. |
70 | * @ihost: host on which the the request was queued |
71 | * @task: request to complete |
72 | * @response: response code for the completed task. |
73 | * @status: status code for the completed task. |
74 | * |
75 | */ |
76 | static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task, |
77 | enum service_response response, |
78 | enum exec_status status) |
79 | |
80 | { |
81 | unsigned long flags; |
82 | |
83 | /* Normal notification (task_done) */ |
84 | dev_dbg(&ihost->pdev->dev, "%s: task = %p, response=%d, status=%d\n" , |
85 | __func__, task, response, status); |
86 | |
87 | spin_lock_irqsave(&task->task_state_lock, flags); |
88 | |
89 | task->task_status.resp = response; |
90 | task->task_status.stat = status; |
91 | |
92 | /* Normal notification (task_done) */ |
93 | task->task_state_flags |= SAS_TASK_STATE_DONE; |
94 | task->task_state_flags &= ~SAS_TASK_STATE_PENDING; |
95 | task->lldd_task = NULL; |
96 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
97 | |
98 | task->task_done(task); |
99 | } |
100 | |
101 | #define for_each_sas_task(num, task) \ |
102 | for (; num > 0; num--,\ |
103 | task = list_entry(task->list.next, struct sas_task, list)) |
104 | |
105 | |
106 | static inline int isci_device_io_ready(struct isci_remote_device *idev, |
107 | struct sas_task *task) |
108 | { |
109 | return idev ? test_bit(IDEV_IO_READY, &idev->flags) || |
110 | (test_bit(IDEV_IO_NCQERROR, &idev->flags) && |
111 | isci_task_is_ncq_recovery(task)) |
112 | : 0; |
113 | } |
114 | /** |
115 | * isci_task_execute_task() - This function is one of the SAS Domain Template |
116 | * functions. This function is called by libsas to send a task down to |
117 | * hardware. |
118 | * @task: This parameter specifies the SAS task to send. |
119 | * @gfp_flags: This parameter specifies the context of this call. |
120 | * |
121 | * status, zero indicates success. |
122 | */ |
123 | int isci_task_execute_task(struct sas_task *task, gfp_t gfp_flags) |
124 | { |
125 | struct isci_host *ihost = dev_to_ihost(dev: task->dev); |
126 | struct isci_remote_device *idev; |
127 | unsigned long flags; |
128 | enum sci_status status = SCI_FAILURE; |
129 | bool io_ready; |
130 | u16 tag; |
131 | |
132 | spin_lock_irqsave(&ihost->scic_lock, flags); |
133 | idev = isci_lookup_device(dev: task->dev); |
134 | io_ready = isci_device_io_ready(idev, task); |
135 | tag = isci_alloc_tag(ihost); |
136 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
137 | |
138 | dev_dbg(&ihost->pdev->dev, |
139 | "task: %p, dev: %p idev: %p:%#lx cmd = %p\n" , |
140 | task, task->dev, idev, idev ? idev->flags : 0, |
141 | task->uldd_task); |
142 | |
143 | if (!idev) { |
144 | isci_task_refuse(ihost, task, response: SAS_TASK_UNDELIVERED, |
145 | status: SAS_DEVICE_UNKNOWN); |
146 | } else if (!io_ready || tag == SCI_CONTROLLER_INVALID_IO_TAG) { |
147 | /* Indicate QUEUE_FULL so that the scsi midlayer |
148 | * retries. |
149 | */ |
150 | isci_task_refuse(ihost, task, response: SAS_TASK_COMPLETE, |
151 | status: SAS_QUEUE_FULL); |
152 | } else { |
153 | /* There is a device and it's ready for I/O. */ |
154 | spin_lock_irqsave(&task->task_state_lock, flags); |
155 | |
156 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
157 | /* The I/O was aborted. */ |
158 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
159 | |
160 | isci_task_refuse(ihost, task, |
161 | response: SAS_TASK_UNDELIVERED, |
162 | status: SAS_SAM_STAT_TASK_ABORTED); |
163 | } else { |
164 | struct isci_request *ireq; |
165 | |
166 | /* do common allocation and init of request object. */ |
167 | ireq = isci_io_request_from_tag(ihost, task, tag); |
168 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
169 | |
170 | /* build and send the request. */ |
171 | /* do common allocation and init of request object. */ |
172 | status = isci_request_execute(ihost, idev, task, ireq); |
173 | |
174 | if (status != SCI_SUCCESS) { |
175 | if (test_bit(IDEV_GONE, &idev->flags)) { |
176 | /* Indicate that the device |
177 | * is gone. |
178 | */ |
179 | isci_task_refuse(ihost, task, |
180 | response: SAS_TASK_UNDELIVERED, |
181 | status: SAS_DEVICE_UNKNOWN); |
182 | } else { |
183 | /* Indicate QUEUE_FULL so that |
184 | * the scsi midlayer retries. |
185 | * If the request failed for |
186 | * remote device reasons, it |
187 | * gets returned as |
188 | * SAS_TASK_UNDELIVERED next |
189 | * time through. |
190 | */ |
191 | isci_task_refuse(ihost, task, |
192 | response: SAS_TASK_COMPLETE, |
193 | status: SAS_QUEUE_FULL); |
194 | } |
195 | } |
196 | } |
197 | } |
198 | |
199 | if (status != SCI_SUCCESS && tag != SCI_CONTROLLER_INVALID_IO_TAG) { |
200 | spin_lock_irqsave(&ihost->scic_lock, flags); |
201 | /* command never hit the device, so just free |
202 | * the tci and skip the sequence increment |
203 | */ |
204 | isci_tci_free(ihost, ISCI_TAG_TCI(tag)); |
205 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
206 | } |
207 | |
208 | isci_put_device(idev); |
209 | return 0; |
210 | } |
211 | |
212 | static struct isci_request *isci_task_request_build(struct isci_host *ihost, |
213 | struct isci_remote_device *idev, |
214 | u16 tag, struct isci_tmf *isci_tmf) |
215 | { |
216 | enum sci_status status = SCI_FAILURE; |
217 | struct isci_request *ireq = NULL; |
218 | struct domain_device *dev; |
219 | |
220 | dev_dbg(&ihost->pdev->dev, |
221 | "%s: isci_tmf = %p\n" , __func__, isci_tmf); |
222 | |
223 | dev = idev->domain_dev; |
224 | |
225 | /* do common allocation and init of request object. */ |
226 | ireq = isci_tmf_request_from_tag(ihost, isci_tmf, tag); |
227 | if (!ireq) |
228 | return NULL; |
229 | |
230 | /* let the core do it's construct. */ |
231 | status = sci_task_request_construct(ihost, idev, io_tag: tag, |
232 | ireq); |
233 | |
234 | if (status != SCI_SUCCESS) { |
235 | dev_warn(&ihost->pdev->dev, |
236 | "%s: sci_task_request_construct failed - " |
237 | "status = 0x%x\n" , |
238 | __func__, |
239 | status); |
240 | return NULL; |
241 | } |
242 | |
243 | /* XXX convert to get this from task->tproto like other drivers */ |
244 | if (dev->dev_type == SAS_END_DEVICE) { |
245 | isci_tmf->proto = SAS_PROTOCOL_SSP; |
246 | sci_task_request_construct_ssp(ireq); |
247 | } |
248 | |
249 | return ireq; |
250 | } |
251 | |
252 | static int isci_task_execute_tmf(struct isci_host *ihost, |
253 | struct isci_remote_device *idev, |
254 | struct isci_tmf *tmf, unsigned long timeout_ms) |
255 | { |
256 | DECLARE_COMPLETION_ONSTACK(completion); |
257 | enum sci_status status = SCI_FAILURE; |
258 | struct isci_request *ireq; |
259 | int ret = TMF_RESP_FUNC_FAILED; |
260 | unsigned long flags; |
261 | unsigned long timeleft; |
262 | u16 tag; |
263 | |
264 | spin_lock_irqsave(&ihost->scic_lock, flags); |
265 | tag = isci_alloc_tag(ihost); |
266 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
267 | |
268 | if (tag == SCI_CONTROLLER_INVALID_IO_TAG) |
269 | return ret; |
270 | |
271 | /* sanity check, return TMF_RESP_FUNC_FAILED |
272 | * if the device is not there and ready. |
273 | */ |
274 | if (!idev || |
275 | (!test_bit(IDEV_IO_READY, &idev->flags) && |
276 | !test_bit(IDEV_IO_NCQERROR, &idev->flags))) { |
277 | dev_dbg(&ihost->pdev->dev, |
278 | "%s: idev = %p not ready (%#lx)\n" , |
279 | __func__, |
280 | idev, idev ? idev->flags : 0); |
281 | goto err_tci; |
282 | } else |
283 | dev_dbg(&ihost->pdev->dev, |
284 | "%s: idev = %p\n" , |
285 | __func__, idev); |
286 | |
287 | /* Assign the pointer to the TMF's completion kernel wait structure. */ |
288 | tmf->complete = &completion; |
289 | tmf->status = SCI_FAILURE_TIMEOUT; |
290 | |
291 | ireq = isci_task_request_build(ihost, idev, tag, isci_tmf: tmf); |
292 | if (!ireq) |
293 | goto err_tci; |
294 | |
295 | spin_lock_irqsave(&ihost->scic_lock, flags); |
296 | |
297 | /* start the TMF io. */ |
298 | status = sci_controller_start_task(ihost, idev, ireq); |
299 | |
300 | if (status != SCI_SUCCESS) { |
301 | dev_dbg(&ihost->pdev->dev, |
302 | "%s: start_io failed - status = 0x%x, request = %p\n" , |
303 | __func__, |
304 | status, |
305 | ireq); |
306 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
307 | goto err_tci; |
308 | } |
309 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
310 | |
311 | /* The RNC must be unsuspended before the TMF can get a response. */ |
312 | isci_remote_device_resume_from_abort(ihost, idev); |
313 | |
314 | /* Wait for the TMF to complete, or a timeout. */ |
315 | timeleft = wait_for_completion_timeout(x: &completion, |
316 | timeout: msecs_to_jiffies(m: timeout_ms)); |
317 | |
318 | if (timeleft == 0) { |
319 | /* The TMF did not complete - this could be because |
320 | * of an unplug. Terminate the TMF request now. |
321 | */ |
322 | isci_remote_device_suspend_terminate(ihost, idev, ireq); |
323 | } |
324 | |
325 | isci_print_tmf(ihost, tmf); |
326 | |
327 | if (tmf->status == SCI_SUCCESS) |
328 | ret = TMF_RESP_FUNC_COMPLETE; |
329 | else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) { |
330 | dev_dbg(&ihost->pdev->dev, |
331 | "%s: tmf.status == " |
332 | "SCI_FAILURE_IO_RESPONSE_VALID\n" , |
333 | __func__); |
334 | ret = TMF_RESP_FUNC_COMPLETE; |
335 | } |
336 | /* Else - leave the default "failed" status alone. */ |
337 | |
338 | dev_dbg(&ihost->pdev->dev, |
339 | "%s: completed request = %p\n" , |
340 | __func__, |
341 | ireq); |
342 | |
343 | return ret; |
344 | |
345 | err_tci: |
346 | spin_lock_irqsave(&ihost->scic_lock, flags); |
347 | isci_tci_free(ihost, ISCI_TAG_TCI(tag)); |
348 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
349 | |
350 | return ret; |
351 | } |
352 | |
353 | static void isci_task_build_tmf(struct isci_tmf *tmf, |
354 | enum isci_tmf_function_codes code) |
355 | { |
356 | memset(tmf, 0, sizeof(*tmf)); |
357 | tmf->tmf_code = code; |
358 | } |
359 | |
360 | static void isci_task_build_abort_task_tmf(struct isci_tmf *tmf, |
361 | enum isci_tmf_function_codes code, |
362 | struct isci_request *old_request) |
363 | { |
364 | isci_task_build_tmf(tmf, code); |
365 | tmf->io_tag = old_request->io_tag; |
366 | } |
367 | |
368 | /* |
369 | * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain |
370 | * Template functions. |
371 | * @lun: This parameter specifies the lun to be reset. |
372 | * |
373 | * status, zero indicates success. |
374 | */ |
375 | static int isci_task_send_lu_reset_sas( |
376 | struct isci_host *isci_host, |
377 | struct isci_remote_device *isci_device, |
378 | u8 *lun) |
379 | { |
380 | struct isci_tmf tmf; |
381 | int ret = TMF_RESP_FUNC_FAILED; |
382 | |
383 | dev_dbg(&isci_host->pdev->dev, |
384 | "%s: isci_host = %p, isci_device = %p\n" , |
385 | __func__, isci_host, isci_device); |
386 | /* Send the LUN reset to the target. By the time the call returns, |
387 | * the TMF has fully exected in the target (in which case the return |
388 | * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or |
389 | * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED"). |
390 | */ |
391 | isci_task_build_tmf(tmf: &tmf, code: isci_tmf_ssp_lun_reset); |
392 | |
393 | #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */ |
394 | ret = isci_task_execute_tmf(ihost: isci_host, idev: isci_device, tmf: &tmf, ISCI_LU_RESET_TIMEOUT_MS); |
395 | |
396 | if (ret == TMF_RESP_FUNC_COMPLETE) |
397 | dev_dbg(&isci_host->pdev->dev, |
398 | "%s: %p: TMF_LU_RESET passed\n" , |
399 | __func__, isci_device); |
400 | else |
401 | dev_dbg(&isci_host->pdev->dev, |
402 | "%s: %p: TMF_LU_RESET failed (%x)\n" , |
403 | __func__, isci_device, ret); |
404 | |
405 | return ret; |
406 | } |
407 | |
408 | int isci_task_lu_reset(struct domain_device *dev, u8 *lun) |
409 | { |
410 | struct isci_host *ihost = dev_to_ihost(dev); |
411 | struct isci_remote_device *idev; |
412 | unsigned long flags; |
413 | int ret = TMF_RESP_FUNC_COMPLETE; |
414 | |
415 | spin_lock_irqsave(&ihost->scic_lock, flags); |
416 | idev = isci_get_device(idev: dev->lldd_dev); |
417 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
418 | |
419 | dev_dbg(&ihost->pdev->dev, |
420 | "%s: domain_device=%p, isci_host=%p; isci_device=%p\n" , |
421 | __func__, dev, ihost, idev); |
422 | |
423 | if (!idev) { |
424 | /* If the device is gone, escalate to I_T_Nexus_Reset. */ |
425 | dev_dbg(&ihost->pdev->dev, "%s: No dev\n" , __func__); |
426 | |
427 | ret = TMF_RESP_FUNC_FAILED; |
428 | goto out; |
429 | } |
430 | |
431 | /* Suspend the RNC, kill all TCs */ |
432 | if (isci_remote_device_suspend_terminate(ihost, idev, NULL) |
433 | != SCI_SUCCESS) { |
434 | /* The suspend/terminate only fails if isci_get_device fails */ |
435 | ret = TMF_RESP_FUNC_FAILED; |
436 | goto out; |
437 | } |
438 | /* All pending I/Os have been terminated and cleaned up. */ |
439 | if (!test_bit(IDEV_GONE, &idev->flags)) { |
440 | if (dev_is_sata(dev)) |
441 | sas_ata_schedule_reset(dev); |
442 | else |
443 | /* Send the task management part of the reset. */ |
444 | ret = isci_task_send_lu_reset_sas(isci_host: ihost, isci_device: idev, lun); |
445 | } |
446 | out: |
447 | isci_put_device(idev); |
448 | return ret; |
449 | } |
450 | |
451 | |
452 | /* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */ |
453 | int isci_task_clear_nexus_port(struct asd_sas_port *port) |
454 | { |
455 | return TMF_RESP_FUNC_FAILED; |
456 | } |
457 | |
458 | |
459 | |
460 | int isci_task_clear_nexus_ha(struct sas_ha_struct *ha) |
461 | { |
462 | return TMF_RESP_FUNC_FAILED; |
463 | } |
464 | |
465 | /* Task Management Functions. Must be called from process context. */ |
466 | |
467 | /** |
468 | * isci_task_abort_task() - This function is one of the SAS Domain Template |
469 | * functions. This function is called by libsas to abort a specified task. |
470 | * @task: This parameter specifies the SAS task to abort. |
471 | * |
472 | * status, zero indicates success. |
473 | */ |
474 | int isci_task_abort_task(struct sas_task *task) |
475 | { |
476 | struct isci_host *ihost = dev_to_ihost(dev: task->dev); |
477 | DECLARE_COMPLETION_ONSTACK(aborted_io_completion); |
478 | struct isci_request *old_request = NULL; |
479 | struct isci_remote_device *idev = NULL; |
480 | struct isci_tmf tmf; |
481 | int ret = TMF_RESP_FUNC_FAILED; |
482 | unsigned long flags; |
483 | int target_done_already = 0; |
484 | |
485 | /* Get the isci_request reference from the task. Note that |
486 | * this check does not depend on the pending request list |
487 | * in the device, because tasks driving resets may land here |
488 | * after completion in the core. |
489 | */ |
490 | spin_lock_irqsave(&ihost->scic_lock, flags); |
491 | spin_lock(lock: &task->task_state_lock); |
492 | |
493 | old_request = task->lldd_task; |
494 | |
495 | /* If task is already done, the request isn't valid */ |
496 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE) && |
497 | old_request) { |
498 | idev = isci_get_device(idev: task->dev->lldd_dev); |
499 | target_done_already = test_bit(IREQ_COMPLETE_IN_TARGET, |
500 | &old_request->flags); |
501 | } |
502 | spin_unlock(lock: &task->task_state_lock); |
503 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
504 | |
505 | dev_warn(&ihost->pdev->dev, |
506 | "%s: dev = %p (%s%s), task = %p, old_request == %p\n" , |
507 | __func__, idev, |
508 | (dev_is_sata(task->dev) ? "STP/SATA" |
509 | : ((dev_is_expander(task->dev->dev_type)) |
510 | ? "SMP" |
511 | : "SSP" )), |
512 | ((idev) ? ((test_bit(IDEV_GONE, &idev->flags)) |
513 | ? " IDEV_GONE" |
514 | : "" ) |
515 | : " <NULL>" ), |
516 | task, old_request); |
517 | |
518 | /* Device reset conditions signalled in task_state_flags are the |
519 | * responsbility of libsas to observe at the start of the error |
520 | * handler thread. |
521 | */ |
522 | if (!idev || !old_request) { |
523 | /* The request has already completed and there |
524 | * is nothing to do here other than to set the task |
525 | * done bit, and indicate that the task abort function |
526 | * was successful. |
527 | */ |
528 | spin_lock_irqsave(&task->task_state_lock, flags); |
529 | task->task_state_flags |= SAS_TASK_STATE_DONE; |
530 | task->task_state_flags &= ~SAS_TASK_STATE_PENDING; |
531 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
532 | |
533 | ret = TMF_RESP_FUNC_COMPLETE; |
534 | |
535 | dev_warn(&ihost->pdev->dev, |
536 | "%s: abort task not needed for %p\n" , |
537 | __func__, task); |
538 | goto out; |
539 | } |
540 | /* Suspend the RNC, kill the TC */ |
541 | if (isci_remote_device_suspend_terminate(ihost, idev, ireq: old_request) |
542 | != SCI_SUCCESS) { |
543 | dev_warn(&ihost->pdev->dev, |
544 | "%s: isci_remote_device_reset_terminate(dev=%p, " |
545 | "req=%p, task=%p) failed\n" , |
546 | __func__, idev, old_request, task); |
547 | ret = TMF_RESP_FUNC_FAILED; |
548 | goto out; |
549 | } |
550 | spin_lock_irqsave(&ihost->scic_lock, flags); |
551 | |
552 | if (task->task_proto == SAS_PROTOCOL_SMP || |
553 | sas_protocol_ata(proto: task->task_proto) || |
554 | target_done_already || |
555 | test_bit(IDEV_GONE, &idev->flags)) { |
556 | |
557 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
558 | |
559 | /* No task to send, so explicitly resume the device here */ |
560 | isci_remote_device_resume_from_abort(ihost, idev); |
561 | |
562 | dev_warn(&ihost->pdev->dev, |
563 | "%s: %s request" |
564 | " or complete_in_target (%d), " |
565 | "or IDEV_GONE (%d), thus no TMF\n" , |
566 | __func__, |
567 | ((task->task_proto == SAS_PROTOCOL_SMP) |
568 | ? "SMP" |
569 | : (sas_protocol_ata(task->task_proto) |
570 | ? "SATA/STP" |
571 | : "<other>" ) |
572 | ), |
573 | test_bit(IREQ_COMPLETE_IN_TARGET, |
574 | &old_request->flags), |
575 | test_bit(IDEV_GONE, &idev->flags)); |
576 | |
577 | spin_lock_irqsave(&task->task_state_lock, flags); |
578 | task->task_state_flags &= ~SAS_TASK_STATE_PENDING; |
579 | task->task_state_flags |= SAS_TASK_STATE_DONE; |
580 | spin_unlock_irqrestore(lock: &task->task_state_lock, flags); |
581 | |
582 | ret = TMF_RESP_FUNC_COMPLETE; |
583 | } else { |
584 | /* Fill in the tmf structure */ |
585 | isci_task_build_abort_task_tmf(tmf: &tmf, code: isci_tmf_ssp_task_abort, |
586 | old_request); |
587 | |
588 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
589 | |
590 | /* Send the task management request. */ |
591 | #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* 1/2 second timeout */ |
592 | ret = isci_task_execute_tmf(ihost, idev, tmf: &tmf, |
593 | ISCI_ABORT_TASK_TIMEOUT_MS); |
594 | } |
595 | out: |
596 | dev_warn(&ihost->pdev->dev, |
597 | "%s: Done; dev = %p, task = %p , old_request == %p\n" , |
598 | __func__, idev, task, old_request); |
599 | isci_put_device(idev); |
600 | return ret; |
601 | } |
602 | |
603 | /** |
604 | * isci_task_abort_task_set() - This function is one of the SAS Domain Template |
605 | * functions. This is one of the Task Management functoins called by libsas, |
606 | * to abort all task for the given lun. |
607 | * @d_device: This parameter specifies the domain device associated with this |
608 | * request. |
609 | * @lun: This parameter specifies the lun associated with this request. |
610 | * |
611 | * status, zero indicates success. |
612 | */ |
613 | int isci_task_abort_task_set( |
614 | struct domain_device *d_device, |
615 | u8 *lun) |
616 | { |
617 | return TMF_RESP_FUNC_FAILED; |
618 | } |
619 | |
620 | |
621 | /** |
622 | * isci_task_clear_task_set() - This function is one of the SAS Domain Template |
623 | * functions. This is one of the Task Management functoins called by libsas. |
624 | * @d_device: This parameter specifies the domain device associated with this |
625 | * request. |
626 | * @lun: This parameter specifies the lun associated with this request. |
627 | * |
628 | * status, zero indicates success. |
629 | */ |
630 | int isci_task_clear_task_set( |
631 | struct domain_device *d_device, |
632 | u8 *lun) |
633 | { |
634 | return TMF_RESP_FUNC_FAILED; |
635 | } |
636 | |
637 | |
638 | /** |
639 | * isci_task_query_task() - This function is implemented to cause libsas to |
640 | * correctly escalate the failed abort to a LUN or target reset (this is |
641 | * because sas_scsi_find_task libsas function does not correctly interpret |
642 | * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is |
643 | * returned, libsas turns this into a LUN reset; when FUNC_FAILED is |
644 | * returned, libsas will turn this into a target reset |
645 | * @task: This parameter specifies the sas task being queried. |
646 | * |
647 | * status, zero indicates success. |
648 | */ |
649 | int isci_task_query_task( |
650 | struct sas_task *task) |
651 | { |
652 | /* See if there is a pending device reset for this device. */ |
653 | if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) |
654 | return TMF_RESP_FUNC_FAILED; |
655 | else |
656 | return TMF_RESP_FUNC_SUCC; |
657 | } |
658 | |
659 | /* |
660 | * isci_task_request_complete() - This function is called by the sci core when |
661 | * an task request completes. |
662 | * @ihost: This parameter specifies the ISCI host object |
663 | * @ireq: This parameter is the completed isci_request object. |
664 | * @completion_status: This parameter specifies the completion status from the |
665 | * sci core. |
666 | * |
667 | * none. |
668 | */ |
669 | void |
670 | isci_task_request_complete(struct isci_host *ihost, |
671 | struct isci_request *ireq, |
672 | enum sci_task_status completion_status) |
673 | { |
674 | struct isci_tmf *tmf = isci_request_access_tmf(ireq); |
675 | struct completion *tmf_complete = NULL; |
676 | |
677 | dev_dbg(&ihost->pdev->dev, |
678 | "%s: request = %p, status=%d\n" , |
679 | __func__, ireq, completion_status); |
680 | |
681 | set_bit(IREQ_COMPLETE_IN_TARGET, addr: &ireq->flags); |
682 | |
683 | if (tmf) { |
684 | tmf->status = completion_status; |
685 | |
686 | if (tmf->proto == SAS_PROTOCOL_SSP) { |
687 | memcpy(tmf->resp.rsp_buf, |
688 | ireq->ssp.rsp_buf, |
689 | SSP_RESP_IU_MAX_SIZE); |
690 | } else if (tmf->proto == SAS_PROTOCOL_SATA) { |
691 | memcpy(&tmf->resp.d2h_fis, |
692 | &ireq->stp.rsp, |
693 | sizeof(struct dev_to_host_fis)); |
694 | } |
695 | /* PRINT_TMF( ((struct isci_tmf *)request->task)); */ |
696 | tmf_complete = tmf->complete; |
697 | } |
698 | sci_controller_complete_io(ihost, idev: ireq->target_device, ireq); |
699 | /* set the 'terminated' flag handle to make sure it cannot be terminated |
700 | * or completed again. |
701 | */ |
702 | set_bit(IREQ_TERMINATED, addr: &ireq->flags); |
703 | |
704 | if (test_and_clear_bit(IREQ_ABORT_PATH_ACTIVE, addr: &ireq->flags)) |
705 | wake_up_all(&ihost->eventq); |
706 | |
707 | if (!test_bit(IREQ_NO_AUTO_FREE_TAG, &ireq->flags)) |
708 | isci_free_tag(ihost, io_tag: ireq->io_tag); |
709 | |
710 | /* The task management part completes last. */ |
711 | if (tmf_complete) |
712 | complete(tmf_complete); |
713 | } |
714 | |
715 | static int isci_reset_device(struct isci_host *ihost, |
716 | struct domain_device *dev, |
717 | struct isci_remote_device *idev) |
718 | { |
719 | int rc = TMF_RESP_FUNC_COMPLETE, reset_stat = -1; |
720 | struct sas_phy *phy = sas_get_local_phy(dev); |
721 | struct isci_port *iport = dev->port->lldd_port; |
722 | |
723 | dev_dbg(&ihost->pdev->dev, "%s: idev %p\n" , __func__, idev); |
724 | |
725 | /* Suspend the RNC, terminate all outstanding TCs. */ |
726 | if (isci_remote_device_suspend_terminate(ihost, idev, NULL) |
727 | != SCI_SUCCESS) { |
728 | rc = TMF_RESP_FUNC_FAILED; |
729 | goto out; |
730 | } |
731 | /* Note that since the termination for outstanding requests succeeded, |
732 | * this function will return success. This is because the resets will |
733 | * only fail if the device has been removed (ie. hotplug), and the |
734 | * primary duty of this function is to cleanup tasks, so that is the |
735 | * relevant status. |
736 | */ |
737 | if (!test_bit(IDEV_GONE, &idev->flags)) { |
738 | if (scsi_is_sas_phy_local(phy)) { |
739 | struct isci_phy *iphy = &ihost->phys[phy->number]; |
740 | |
741 | reset_stat = isci_port_perform_hard_reset(ihost, iport, |
742 | iphy); |
743 | } else |
744 | reset_stat = sas_phy_reset(phy, hard_reset: !dev_is_sata(dev)); |
745 | } |
746 | /* Explicitly resume the RNC here, since there was no task sent. */ |
747 | isci_remote_device_resume_from_abort(ihost, idev); |
748 | |
749 | dev_dbg(&ihost->pdev->dev, "%s: idev %p complete, reset_stat=%d.\n" , |
750 | __func__, idev, reset_stat); |
751 | out: |
752 | sas_put_local_phy(phy); |
753 | return rc; |
754 | } |
755 | |
756 | int isci_task_I_T_nexus_reset(struct domain_device *dev) |
757 | { |
758 | struct isci_host *ihost = dev_to_ihost(dev); |
759 | struct isci_remote_device *idev; |
760 | unsigned long flags; |
761 | int ret; |
762 | |
763 | spin_lock_irqsave(&ihost->scic_lock, flags); |
764 | idev = isci_get_device(idev: dev->lldd_dev); |
765 | spin_unlock_irqrestore(lock: &ihost->scic_lock, flags); |
766 | |
767 | if (!idev) { |
768 | /* XXX: need to cleanup any ireqs targeting this |
769 | * domain_device |
770 | */ |
771 | ret = -ENODEV; |
772 | goto out; |
773 | } |
774 | |
775 | ret = isci_reset_device(ihost, dev, idev); |
776 | out: |
777 | isci_put_device(idev); |
778 | return ret; |
779 | } |
780 | |