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6f231dda DW |
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 "scic_task_request.h" | |
58 | #include "scic_remote_device.h" | |
59 | #include "scic_io_request.h" | |
60 | #include "scic_sds_remote_device.h" | |
61 | #include "scic_sds_remote_node_context.h" | |
62 | #include "isci.h" | |
63 | #include "request.h" | |
64 | #include "sata.h" | |
65 | #include "task.h" | |
66 | ||
67 | ||
68 | /** | |
69 | * isci_task_execute_task() - This function is one of the SAS Domain Template | |
70 | * functions. This function is called by libsas to send a task down to | |
71 | * hardware. | |
72 | * @task: This parameter specifies the SAS task to send. | |
73 | * @num: This parameter specifies the number of tasks to queue. | |
74 | * @gfp_flags: This parameter specifies the context of this call. | |
75 | * | |
76 | * status, zero indicates success. | |
77 | */ | |
78 | int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags) | |
79 | { | |
80 | struct isci_host *isci_host; | |
81 | struct isci_request *request = NULL; | |
82 | struct isci_remote_device *device; | |
83 | unsigned long flags; | |
6f231dda DW |
84 | int ret; |
85 | enum sci_status status; | |
f0846c68 | 86 | enum isci_status device_status; |
6f231dda DW |
87 | |
88 | dev_dbg(task->dev->port->ha->dev, "%s: num=%d\n", __func__, num); | |
89 | ||
6f231dda DW |
90 | if ((task->dev == NULL) || (task->dev->port == NULL)) { |
91 | ||
92 | /* Indicate SAS_TASK_UNDELIVERED, so that the scsi midlayer | |
93 | * removes the target. | |
94 | */ | |
95 | isci_task_complete_for_upper_layer( | |
96 | task, | |
97 | SAS_TASK_UNDELIVERED, | |
98 | SAS_DEVICE_UNKNOWN, | |
99 | isci_perform_normal_io_completion | |
100 | ); | |
101 | return 0; /* The I/O was accepted (and failed). */ | |
102 | } | |
103 | isci_host = isci_host_from_sas_ha(task->dev->port->ha); | |
104 | ||
105 | /* Check if we have room for more tasks */ | |
106 | ret = isci_host_can_queue(isci_host, num); | |
107 | ||
108 | if (ret) { | |
109 | dev_warn(task->dev->port->ha->dev, "%s: queue full\n", __func__); | |
110 | return ret; | |
111 | } | |
112 | ||
113 | do { | |
114 | dev_dbg(task->dev->port->ha->dev, | |
115 | "task = %p, num = %d; dev = %p; cmd = %p\n", | |
116 | task, num, task->dev, task->uldd_task); | |
117 | ||
118 | if ((task->dev == NULL) || (task->dev->port == NULL)) { | |
119 | dev_warn(task->dev->port->ha->dev, | |
120 | "%s: task %p's port or dev == NULL!\n", | |
121 | __func__, task); | |
122 | ||
123 | /* Indicate SAS_TASK_UNDELIVERED, so that the scsi | |
124 | * midlayer removes the target. | |
125 | */ | |
126 | isci_task_complete_for_upper_layer( | |
127 | task, | |
128 | SAS_TASK_UNDELIVERED, | |
129 | SAS_DEVICE_UNKNOWN, | |
130 | isci_perform_normal_io_completion | |
131 | ); | |
132 | /* We don't have a valid host reference, so we | |
133 | * can't control the host queueing condition. | |
134 | */ | |
f0846c68 | 135 | goto next_task; |
6f231dda DW |
136 | } |
137 | ||
138 | device = isci_dev_from_domain_dev(task->dev); | |
139 | ||
140 | isci_host = isci_host_from_sas_ha(task->dev->port->ha); | |
141 | ||
f0846c68 JS |
142 | if (device) |
143 | device_status = device->status; | |
144 | else | |
145 | device_status = isci_freed; | |
146 | ||
147 | /* From this point onward, any process that needs to guarantee | |
148 | * that there is no kernel I/O being started will have to wait | |
149 | * for the quiesce spinlock. | |
150 | */ | |
151 | ||
152 | if (device_status != isci_ready_for_io) { | |
6f231dda DW |
153 | |
154 | /* Forces a retry from scsi mid layer. */ | |
155 | dev_warn(task->dev->port->ha->dev, | |
156 | "%s: task %p: isci_host->status = %d, " | |
f0846c68 | 157 | "device = %p; device_status = 0x%x\n\n", |
6f231dda DW |
158 | __func__, |
159 | task, | |
160 | isci_host_get_state(isci_host), | |
f0846c68 | 161 | device, device_status); |
6f231dda | 162 | |
f0846c68 JS |
163 | if (device_status == isci_ready) { |
164 | /* Indicate QUEUE_FULL so that the scsi midlayer | |
165 | * retries. | |
166 | */ | |
167 | isci_task_complete_for_upper_layer( | |
168 | task, | |
169 | SAS_TASK_COMPLETE, | |
170 | SAS_QUEUE_FULL, | |
171 | isci_perform_normal_io_completion | |
172 | ); | |
173 | } else { | |
174 | /* Else, the device is going down. */ | |
175 | isci_task_complete_for_upper_layer( | |
176 | task, | |
177 | SAS_TASK_UNDELIVERED, | |
178 | SAS_DEVICE_UNKNOWN, | |
179 | isci_perform_normal_io_completion | |
180 | ); | |
181 | } | |
6f231dda | 182 | isci_host_can_dequeue(isci_host, 1); |
f0846c68 JS |
183 | } else { |
184 | /* There is a device and it's ready for I/O. */ | |
185 | spin_lock_irqsave(&task->task_state_lock, flags); | |
6f231dda | 186 | |
f0846c68 | 187 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
6f231dda | 188 | |
f0846c68 JS |
189 | spin_unlock_irqrestore(&task->task_state_lock, |
190 | flags); | |
6f231dda | 191 | |
f0846c68 JS |
192 | isci_task_complete_for_upper_layer( |
193 | task, | |
194 | SAS_TASK_UNDELIVERED, | |
195 | SAM_STAT_TASK_ABORTED, | |
196 | isci_perform_normal_io_completion | |
197 | ); | |
6f231dda | 198 | |
f0846c68 | 199 | /* The I/O was aborted. */ |
6f231dda | 200 | |
f0846c68 | 201 | } else { |
6f231dda DW |
202 | task->task_state_flags |= SAS_TASK_AT_INITIATOR; |
203 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
f0846c68 JS |
204 | |
205 | /* build and send the request. */ | |
206 | status = isci_request_execute(isci_host, task, &request, | |
207 | gfp_flags); | |
208 | ||
209 | if (status != SCI_SUCCESS) { | |
210 | ||
211 | spin_lock_irqsave(&task->task_state_lock, flags); | |
212 | /* Did not really start this command. */ | |
213 | task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; | |
214 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
215 | ||
216 | /* Indicate QUEUE_FULL so that the scsi | |
217 | * midlayer retries. if the request | |
218 | * failed for remote device reasons, | |
219 | * it gets returned as | |
220 | * SAS_TASK_UNDELIVERED next time | |
221 | * through. | |
222 | */ | |
223 | isci_task_complete_for_upper_layer( | |
6f231dda DW |
224 | task, |
225 | SAS_TASK_COMPLETE, | |
226 | SAS_QUEUE_FULL, | |
227 | isci_perform_normal_io_completion | |
228 | ); | |
f0846c68 JS |
229 | isci_host_can_dequeue(isci_host, 1); |
230 | } | |
6f231dda DW |
231 | } |
232 | } | |
f0846c68 | 233 | next_task: |
6f231dda DW |
234 | task = list_entry(task->list.next, struct sas_task, list); |
235 | } while (--num > 0); | |
236 | return 0; | |
237 | } | |
238 | ||
239 | ||
240 | ||
241 | /** | |
242 | * isci_task_request_build() - This function builds the task request object. | |
243 | * @isci_host: This parameter specifies the ISCI host object | |
244 | * @request: This parameter points to the isci_request object allocated in the | |
245 | * request construct function. | |
246 | * @tmf: This parameter is the task management struct to be built | |
247 | * | |
248 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
249 | */ | |
250 | static enum sci_status isci_task_request_build( | |
251 | struct isci_host *isci_host, | |
252 | struct isci_request **isci_request, | |
253 | struct isci_tmf *isci_tmf) | |
254 | { | |
255 | struct scic_sds_remote_device *sci_device; | |
256 | enum sci_status status = SCI_FAILURE; | |
257 | struct isci_request *request; | |
258 | struct isci_remote_device *isci_device; | |
259 | /* struct sci_sas_identify_address_frame_protocols dev_protocols; */ | |
260 | struct smp_discover_response_protocols dev_protocols; | |
261 | ||
262 | ||
263 | dev_dbg(&isci_host->pdev->dev, | |
264 | "%s: isci_tmf = %p\n", __func__, isci_tmf); | |
265 | ||
266 | isci_device = isci_tmf->device; | |
3a97eec6 | 267 | sci_device = to_sci_dev(isci_device); |
6f231dda DW |
268 | |
269 | /* do common allocation and init of request object. */ | |
270 | status = isci_request_alloc_tmf( | |
271 | isci_host, | |
272 | isci_tmf, | |
273 | &request, | |
274 | isci_device, | |
275 | GFP_ATOMIC | |
276 | ); | |
277 | ||
278 | if (status != SCI_SUCCESS) | |
279 | goto out; | |
280 | ||
281 | /* let the core do it's construct. */ | |
282 | status = scic_task_request_construct( | |
283 | isci_host->core_controller, | |
284 | sci_device, | |
285 | SCI_CONTROLLER_INVALID_IO_TAG, | |
286 | request, | |
287 | request->sci_request_mem_ptr, | |
288 | &request->sci_request_handle | |
289 | ); | |
290 | ||
291 | if (status != SCI_SUCCESS) { | |
292 | dev_warn(&isci_host->pdev->dev, | |
293 | "%s: scic_task_request_construct failed - " | |
294 | "status = 0x%x\n", | |
295 | __func__, | |
296 | status); | |
297 | goto errout; | |
298 | } | |
299 | ||
300 | sci_object_set_association( | |
301 | request->sci_request_handle, | |
302 | request | |
303 | ); | |
304 | ||
305 | scic_remote_device_get_protocols( | |
306 | sci_device, | |
307 | &dev_protocols | |
308 | ); | |
309 | ||
310 | /* let the core do it's protocol | |
311 | * specific construction. | |
312 | */ | |
313 | if (dev_protocols.u.bits.attached_ssp_target) { | |
314 | ||
315 | isci_tmf->proto = SAS_PROTOCOL_SSP; | |
316 | status = scic_task_request_construct_ssp( | |
317 | request->sci_request_handle | |
318 | ); | |
319 | if (status != SCI_SUCCESS) | |
320 | goto errout; | |
321 | } | |
322 | ||
323 | if (dev_protocols.u.bits.attached_stp_target) { | |
324 | ||
325 | isci_tmf->proto = SAS_PROTOCOL_SATA; | |
326 | status = isci_sata_management_task_request_build(request); | |
327 | ||
328 | if (status != SCI_SUCCESS) | |
329 | goto errout; | |
330 | } | |
331 | ||
332 | goto out; | |
333 | ||
334 | errout: | |
335 | ||
336 | /* release the dma memory if we fail. */ | |
337 | isci_request_free(isci_host, request); | |
338 | request = NULL; | |
339 | ||
340 | out: | |
341 | *isci_request = request; | |
342 | return status; | |
343 | } | |
344 | ||
345 | /** | |
346 | * isci_tmf_timeout_cb() - This function is called as a kernel callback when | |
347 | * the timeout period for the TMF has expired. | |
348 | * | |
349 | * | |
350 | */ | |
351 | static void isci_tmf_timeout_cb(void *tmf_request_arg) | |
352 | { | |
353 | struct isci_request *request = (struct isci_request *)tmf_request_arg; | |
354 | struct isci_tmf *tmf = isci_request_access_tmf(request); | |
355 | enum sci_status status; | |
356 | ||
357 | BUG_ON(request->ttype != tmf_task); | |
358 | ||
359 | /* This task management request has timed-out. Terminate the request | |
360 | * so that the request eventually completes to the requestor in the | |
361 | * request completion callback path. | |
362 | */ | |
363 | /* Note - the timer callback function itself has provided spinlock | |
364 | * exclusion from the start and completion paths. No need to take | |
365 | * the request->isci_host->scic_lock here. | |
366 | */ | |
367 | ||
368 | if (tmf->timeout_timer != NULL) { | |
369 | /* Call the users callback, if any. */ | |
370 | if (tmf->cb_state_func != NULL) | |
371 | tmf->cb_state_func(isci_tmf_timed_out, tmf, | |
372 | tmf->cb_data); | |
373 | ||
374 | /* Terminate the TMF transmit request. */ | |
375 | status = scic_controller_terminate_request( | |
376 | request->isci_host->core_controller, | |
3a97eec6 | 377 | to_sci_dev(request->isci_device), |
6f231dda DW |
378 | request->sci_request_handle |
379 | ); | |
380 | ||
381 | dev_dbg(&request->isci_host->pdev->dev, | |
382 | "%s: tmf_request = %p; tmf = %p; status = %d\n", | |
383 | __func__, request, tmf, status); | |
384 | } else | |
385 | dev_dbg(&request->isci_host->pdev->dev, | |
386 | "%s: timer already canceled! " | |
387 | "tmf_request = %p; tmf = %p\n", | |
388 | __func__, request, tmf); | |
389 | ||
390 | /* No need to unlock since the caller to this callback is doing it for | |
391 | * us. | |
392 | * request->isci_host->scic_lock | |
393 | */ | |
394 | } | |
395 | ||
396 | /** | |
397 | * isci_task_execute_tmf() - This function builds and sends a task request, | |
398 | * then waits for the completion. | |
399 | * @isci_host: This parameter specifies the ISCI host object | |
400 | * @tmf: This parameter is the pointer to the task management structure for | |
401 | * this request. | |
402 | * @timeout_ms: This parameter specifies the timeout period for the task | |
403 | * management request. | |
404 | * | |
405 | * TMF_RESP_FUNC_COMPLETE on successful completion of the TMF (this includes | |
406 | * error conditions reported in the IU status), or TMF_RESP_FUNC_FAILED. | |
407 | */ | |
408 | int isci_task_execute_tmf( | |
409 | struct isci_host *isci_host, | |
410 | struct isci_tmf *tmf, | |
411 | unsigned long timeout_ms) | |
412 | { | |
413 | DECLARE_COMPLETION_ONSTACK(completion); | |
414 | enum sci_status status = SCI_FAILURE; | |
415 | struct scic_sds_remote_device *sci_device; | |
416 | struct isci_remote_device *isci_device = tmf->device; | |
417 | struct isci_request *request; | |
418 | int ret = TMF_RESP_FUNC_FAILED; | |
419 | unsigned long flags; | |
420 | ||
421 | /* sanity check, return TMF_RESP_FUNC_FAILED | |
422 | * if the device is not there and ready. | |
423 | */ | |
8acaec15 | 424 | if (!isci_device || isci_device->status != isci_ready_for_io) { |
6f231dda DW |
425 | dev_dbg(&isci_host->pdev->dev, |
426 | "%s: isci_device = %p not ready (%d)\n", | |
427 | __func__, | |
8acaec15 | 428 | isci_device, isci_device->status); |
6f231dda DW |
429 | return TMF_RESP_FUNC_FAILED; |
430 | } else | |
431 | dev_dbg(&isci_host->pdev->dev, | |
432 | "%s: isci_device = %p\n", | |
433 | __func__, isci_device); | |
434 | ||
3a97eec6 | 435 | sci_device = to_sci_dev(isci_device); |
6f231dda DW |
436 | |
437 | /* Assign the pointer to the TMF's completion kernel wait structure. */ | |
438 | tmf->complete = &completion; | |
439 | ||
440 | isci_task_request_build( | |
441 | isci_host, | |
442 | &request, | |
443 | tmf | |
444 | ); | |
445 | ||
446 | if (!request) { | |
447 | dev_warn(&isci_host->pdev->dev, | |
448 | "%s: isci_task_request_build failed\n", | |
449 | __func__); | |
450 | return TMF_RESP_FUNC_FAILED; | |
451 | } | |
452 | ||
453 | /* Allocate the TMF timeout timer. */ | |
6f231dda | 454 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
7c40a803 | 455 | tmf->timeout_timer = isci_timer_create(isci_host, request, isci_tmf_timeout_cb); |
6f231dda DW |
456 | |
457 | /* Start the timer. */ | |
458 | if (tmf->timeout_timer) | |
459 | isci_timer_start(tmf->timeout_timer, timeout_ms); | |
460 | else | |
461 | dev_warn(&isci_host->pdev->dev, | |
462 | "%s: isci_timer_create failed!!!!\n", | |
463 | __func__); | |
464 | ||
465 | /* start the TMF io. */ | |
466 | status = scic_controller_start_task( | |
467 | isci_host->core_controller, | |
468 | sci_device, | |
469 | request->sci_request_handle, | |
470 | SCI_CONTROLLER_INVALID_IO_TAG | |
471 | ); | |
472 | ||
473 | if (status != SCI_SUCCESS) { | |
474 | dev_warn(&isci_host->pdev->dev, | |
475 | "%s: start_io failed - status = 0x%x, request = %p\n", | |
476 | __func__, | |
477 | status, | |
478 | request); | |
479 | goto cleanup_request; | |
480 | } | |
481 | ||
482 | /* Call the users callback, if any. */ | |
483 | if (tmf->cb_state_func != NULL) | |
484 | tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data); | |
485 | ||
486 | /* Change the state of the TMF-bearing request to "started". */ | |
487 | isci_request_change_state(request, started); | |
488 | ||
489 | /* add the request to the remote device request list. */ | |
490 | list_add(&request->dev_node, &isci_device->reqs_in_process); | |
491 | ||
492 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
493 | ||
494 | /* Wait for the TMF to complete, or a timeout. */ | |
495 | wait_for_completion(&completion); | |
496 | ||
497 | isci_print_tmf(tmf); | |
498 | ||
499 | if (tmf->status == SCI_SUCCESS) | |
500 | ret = TMF_RESP_FUNC_COMPLETE; | |
501 | else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) { | |
502 | dev_dbg(&isci_host->pdev->dev, | |
503 | "%s: tmf.status == " | |
504 | "SCI_FAILURE_IO_RESPONSE_VALID\n", | |
505 | __func__); | |
506 | ret = TMF_RESP_FUNC_COMPLETE; | |
507 | } | |
508 | /* Else - leave the default "failed" status alone. */ | |
509 | ||
510 | dev_dbg(&isci_host->pdev->dev, | |
511 | "%s: completed request = %p\n", | |
512 | __func__, | |
513 | request); | |
514 | ||
515 | if (request->io_request_completion != NULL) { | |
516 | ||
517 | /* The fact that this is non-NULL for a TMF request | |
518 | * means there is a thread waiting for this TMF to | |
519 | * finish. | |
520 | */ | |
521 | complete(request->io_request_completion); | |
522 | } | |
523 | ||
524 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
525 | ||
526 | cleanup_request: | |
527 | ||
528 | /* Clean up the timer if needed. */ | |
529 | if (tmf->timeout_timer) { | |
7c40a803 | 530 | isci_del_timer(isci_host, tmf->timeout_timer); |
6f231dda DW |
531 | tmf->timeout_timer = NULL; |
532 | } | |
533 | ||
534 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
535 | ||
536 | isci_request_free(isci_host, request); | |
537 | ||
538 | return ret; | |
539 | } | |
540 | ||
541 | void isci_task_build_tmf( | |
542 | struct isci_tmf *tmf, | |
543 | struct isci_remote_device *isci_device, | |
544 | enum isci_tmf_function_codes code, | |
545 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
546 | struct isci_tmf *, | |
547 | void *), | |
c3f42feb | 548 | void *cb_data) |
6f231dda DW |
549 | { |
550 | dev_dbg(&isci_device->isci_port->isci_host->pdev->dev, | |
551 | "%s: isci_device = %p\n", __func__, isci_device); | |
552 | ||
553 | memset(tmf, 0, sizeof(*tmf)); | |
554 | ||
555 | tmf->device = isci_device; | |
556 | tmf->tmf_code = code; | |
557 | tmf->timeout_timer = NULL; | |
558 | tmf->cb_state_func = tmf_sent_cb; | |
c3f42feb JS |
559 | tmf->cb_data = cb_data; |
560 | } | |
1fad9e93 | 561 | |
c3f42feb JS |
562 | void isci_task_build_abort_task_tmf( |
563 | struct isci_tmf *tmf, | |
564 | struct isci_remote_device *isci_device, | |
565 | enum isci_tmf_function_codes code, | |
566 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
567 | struct isci_tmf *, | |
568 | void *), | |
569 | struct isci_request *old_request) | |
570 | { | |
571 | isci_task_build_tmf(tmf, isci_device, code, tmf_sent_cb, | |
572 | (void *)old_request); | |
573 | tmf->io_tag = old_request->io_tag; | |
6f231dda DW |
574 | } |
575 | ||
576 | static struct isci_request *isci_task_get_request_from_task( | |
577 | struct sas_task *task, | |
578 | struct isci_host **isci_host, | |
579 | struct isci_remote_device **isci_device) | |
580 | { | |
581 | ||
582 | struct isci_request *request = NULL; | |
583 | unsigned long flags; | |
584 | ||
585 | spin_lock_irqsave(&task->task_state_lock, flags); | |
586 | ||
587 | request = task->lldd_task; | |
588 | ||
589 | /* If task is already done, the request isn't valid */ | |
590 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE) && | |
591 | (task->task_state_flags & SAS_TASK_AT_INITIATOR) && | |
592 | (request != NULL)) { | |
593 | ||
594 | if (isci_host != NULL) | |
595 | *isci_host = request->isci_host; | |
596 | ||
597 | if (isci_device != NULL) | |
598 | *isci_device = request->isci_device; | |
599 | } | |
600 | ||
601 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
602 | ||
603 | return request; | |
604 | } | |
605 | ||
606 | /** | |
607 | * isci_task_validate_request_to_abort() - This function checks the given I/O | |
608 | * against the "started" state. If the request is still "started", it's | |
609 | * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD | |
610 | * BEFORE CALLING THIS FUNCTION. | |
611 | * @isci_request: This parameter specifies the request object to control. | |
612 | * @isci_host: This parameter specifies the ISCI host object | |
613 | * @isci_device: This is the device to which the request is pending. | |
614 | * @aborted_io_completion: This is a completion structure that will be added to | |
615 | * the request in case it is changed to aborting; this completion is | |
616 | * triggered when the request is fully completed. | |
617 | * | |
618 | * Either "started" on successful change of the task status to "aborted", or | |
619 | * "unallocated" if the task cannot be controlled. | |
620 | */ | |
621 | static enum isci_request_status isci_task_validate_request_to_abort( | |
622 | struct isci_request *isci_request, | |
623 | struct isci_host *isci_host, | |
624 | struct isci_remote_device *isci_device, | |
625 | struct completion *aborted_io_completion) | |
626 | { | |
627 | enum isci_request_status old_state = unallocated; | |
628 | ||
629 | /* Only abort the task if it's in the | |
630 | * device's request_in_process list | |
631 | */ | |
632 | if (isci_request && !list_empty(&isci_request->dev_node)) { | |
633 | old_state = isci_request_change_started_to_aborted( | |
634 | isci_request, aborted_io_completion); | |
635 | ||
6f231dda DW |
636 | } |
637 | ||
638 | return old_state; | |
639 | } | |
640 | ||
641 | static void isci_request_cleanup_completed_loiterer( | |
642 | struct isci_host *isci_host, | |
643 | struct isci_remote_device *isci_device, | |
644 | struct isci_request *isci_request) | |
645 | { | |
18d3d72a JS |
646 | struct sas_task *task; |
647 | unsigned long flags; | |
648 | ||
649 | task = (isci_request->ttype == io_task) | |
650 | ? isci_request_access_task(isci_request) | |
651 | : NULL; | |
6f231dda DW |
652 | |
653 | dev_dbg(&isci_host->pdev->dev, | |
654 | "%s: isci_device=%p, request=%p, task=%p\n", | |
18d3d72a | 655 | __func__, isci_device, isci_request, task); |
6f231dda DW |
656 | |
657 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
658 | list_del_init(&isci_request->dev_node); | |
6f231dda DW |
659 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
660 | ||
a5fde225 JS |
661 | if (task != NULL) { |
662 | ||
663 | spin_lock_irqsave(&task->task_state_lock, flags); | |
664 | task->lldd_task = NULL; | |
665 | ||
666 | isci_set_task_doneflags(task); | |
667 | ||
668 | /* If this task is not in the abort path, call task_done. */ | |
669 | if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { | |
670 | ||
671 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
672 | task->task_done(task); | |
673 | } else | |
674 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
675 | } | |
6f231dda DW |
676 | isci_request_free(isci_host, isci_request); |
677 | } | |
4dc043c4 JS |
678 | |
679 | /** | |
680 | * @isci_termination_timed_out(): this function will deal with a request for | |
681 | * which the wait for termination has timed-out. | |
682 | * | |
683 | * @isci_host This SCU. | |
684 | * @isci_request The I/O request being terminated. | |
685 | */ | |
686 | static void | |
687 | isci_termination_timed_out( | |
688 | struct isci_host * host, | |
689 | struct isci_request * request | |
690 | ) | |
691 | { | |
692 | unsigned long state_flags; | |
693 | ||
694 | dev_warn(&host->pdev->dev, | |
695 | "%s: host = %p; request = %p\n", | |
696 | __func__, host, request); | |
697 | ||
698 | /* At this point, the request to terminate | |
699 | * has timed out. The best we can do is to | |
700 | * have the request die a silent death | |
701 | * if it ever completes. | |
702 | */ | |
703 | spin_lock_irqsave(&request->state_lock, state_flags); | |
704 | ||
705 | if (request->status == started) { | |
706 | ||
707 | /* Set the request state to "dead", | |
708 | * and clear the task pointer so that an actual | |
709 | * completion event callback doesn't do | |
710 | * anything. | |
711 | */ | |
712 | request->status = dead; | |
713 | ||
714 | /* Clear the timeout completion event pointer.*/ | |
715 | request->io_request_completion = NULL; | |
716 | ||
717 | if (request->ttype == io_task) { | |
718 | ||
719 | /* Break links with the sas_task. */ | |
720 | if (request->ttype_ptr.io_task_ptr != NULL) { | |
721 | ||
722 | request->ttype_ptr.io_task_ptr->lldd_task = NULL; | |
723 | request->ttype_ptr.io_task_ptr = NULL; | |
724 | } | |
725 | } | |
726 | } | |
727 | spin_unlock_irqrestore(&request->state_lock, state_flags); | |
728 | } | |
729 | ||
730 | ||
6f231dda DW |
731 | /** |
732 | * isci_terminate_request_core() - This function will terminate the given | |
733 | * request, and wait for it to complete. This function must only be called | |
734 | * from a thread that can wait. Note that the request is terminated and | |
735 | * completed (back to the host, if started there). | |
736 | * @isci_host: This SCU. | |
737 | * @isci_device: The target. | |
738 | * @isci_request: The I/O request to be terminated. | |
739 | * | |
740 | * | |
741 | */ | |
742 | static void isci_terminate_request_core( | |
743 | struct isci_host *isci_host, | |
744 | struct isci_remote_device *isci_device, | |
cbb65c66 | 745 | struct isci_request *isci_request) |
6f231dda | 746 | { |
cbb65c66 | 747 | enum sci_status status = SCI_SUCCESS; |
6f231dda DW |
748 | bool was_terminated = false; |
749 | bool needs_cleanup_handling = false; | |
750 | enum isci_request_status request_status; | |
751 | unsigned long flags; | |
4dc043c4 JS |
752 | unsigned long timeout_remaining; |
753 | ||
6f231dda DW |
754 | |
755 | dev_dbg(&isci_host->pdev->dev, | |
756 | "%s: device = %p; request = %p\n", | |
757 | __func__, isci_device, isci_request); | |
758 | ||
6f231dda | 759 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
4dc043c4 JS |
760 | |
761 | /* Note that we are not going to control | |
762 | * the target to abort the request. | |
763 | */ | |
764 | isci_request->complete_in_target = true; | |
765 | ||
6f231dda DW |
766 | /* Make sure the request wasn't just sitting around signalling |
767 | * device condition (if the request handle is NULL, then the | |
768 | * request completed but needed additional handling here). | |
769 | */ | |
770 | if (isci_request->sci_request_handle != NULL) { | |
771 | was_terminated = true; | |
cbb65c66 | 772 | needs_cleanup_handling = true; |
6f231dda DW |
773 | status = scic_controller_terminate_request( |
774 | isci_host->core_controller, | |
3a97eec6 | 775 | to_sci_dev(isci_device), |
6f231dda DW |
776 | isci_request->sci_request_handle |
777 | ); | |
778 | } | |
779 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
780 | ||
781 | /* | |
782 | * The only time the request to terminate will | |
783 | * fail is when the io request is completed and | |
784 | * being aborted. | |
785 | */ | |
4dc043c4 | 786 | if (status != SCI_SUCCESS) { |
6f231dda DW |
787 | dev_err(&isci_host->pdev->dev, |
788 | "%s: scic_controller_terminate_request" | |
789 | " returned = 0x%x\n", | |
790 | __func__, | |
791 | status); | |
4dc043c4 JS |
792 | /* Clear the completion pointer from the request. */ |
793 | isci_request->io_request_completion = NULL; | |
794 | ||
795 | } else { | |
6f231dda DW |
796 | if (was_terminated) { |
797 | dev_dbg(&isci_host->pdev->dev, | |
798 | "%s: before completion wait (%p)\n", | |
799 | __func__, | |
cbb65c66 | 800 | isci_request->io_request_completion); |
6f231dda DW |
801 | |
802 | /* Wait here for the request to complete. */ | |
4dc043c4 JS |
803 | #define TERMINATION_TIMEOUT_MSEC 50 |
804 | timeout_remaining | |
805 | = wait_for_completion_timeout( | |
806 | isci_request->io_request_completion, | |
807 | msecs_to_jiffies(TERMINATION_TIMEOUT_MSEC)); | |
808 | ||
809 | if (!timeout_remaining) { | |
810 | ||
811 | isci_termination_timed_out(isci_host, | |
812 | isci_request); | |
813 | ||
814 | dev_err(&isci_host->pdev->dev, | |
815 | "%s: *** Timeout waiting for " | |
816 | "termination(%p/%p)\n", | |
817 | __func__, | |
818 | isci_request->io_request_completion, | |
819 | isci_request); | |
820 | ||
821 | } else | |
822 | dev_dbg(&isci_host->pdev->dev, | |
823 | "%s: after completion wait (%p)\n", | |
824 | __func__, | |
825 | isci_request->io_request_completion); | |
826 | } | |
827 | /* Clear the completion pointer from the request. */ | |
828 | isci_request->io_request_completion = NULL; | |
829 | ||
830 | /* Peek at the status of the request. This will tell | |
831 | * us if there was special handling on the request such that it | |
832 | * needs to be detached and freed here. | |
833 | */ | |
834 | spin_lock_irqsave(&isci_request->state_lock, flags); | |
835 | request_status = isci_request_get_state(isci_request); | |
836 | ||
837 | if ((isci_request->ttype == io_task) /* TMFs are in their own thread */ | |
838 | && ((request_status == aborted) | |
839 | || (request_status == aborting) | |
840 | || (request_status == terminating) | |
841 | || (request_status == completed) | |
842 | || (request_status == dead) | |
843 | ) | |
844 | ) { | |
845 | ||
846 | /* The completion routine won't free a request in | |
847 | * the aborted/aborting/etc. states, so we do | |
848 | * it here. | |
849 | */ | |
850 | needs_cleanup_handling = true; | |
6f231dda | 851 | } |
4dc043c4 | 852 | spin_unlock_irqrestore(&isci_request->state_lock, flags); |
6f231dda DW |
853 | |
854 | if (needs_cleanup_handling) | |
855 | isci_request_cleanup_completed_loiterer( | |
856 | isci_host, isci_device, isci_request | |
857 | ); | |
858 | } | |
859 | } | |
cbb65c66 | 860 | |
6f231dda DW |
861 | static void isci_terminate_request( |
862 | struct isci_host *isci_host, | |
863 | struct isci_remote_device *isci_device, | |
864 | struct isci_request *isci_request, | |
865 | enum isci_request_status new_request_state) | |
866 | { | |
867 | enum isci_request_status old_state; | |
6f231dda | 868 | DECLARE_COMPLETION_ONSTACK(request_completion); |
6f231dda DW |
869 | |
870 | /* Change state to "new_request_state" if it is currently "started" */ | |
871 | old_state = isci_request_change_started_to_newstate( | |
872 | isci_request, | |
873 | &request_completion, | |
874 | new_request_state | |
875 | ); | |
876 | ||
a5fde225 | 877 | if ((old_state == started) || (old_state == completed)) { |
6f231dda | 878 | |
a5fde225 JS |
879 | /* If the old_state is started: |
880 | * This request was not already being aborted. If it had been, | |
6f231dda DW |
881 | * then the aborting I/O (ie. the TMF request) would not be in |
882 | * the aborting state, and thus would be terminated here. Note | |
883 | * that since the TMF completion's call to the kernel function | |
884 | * "complete()" does not happen until the pending I/O request | |
885 | * terminate fully completes, we do not have to implement a | |
886 | * special wait here for already aborting requests - the | |
887 | * termination of the TMF request will force the request | |
888 | * to finish it's already started terminate. | |
a5fde225 JS |
889 | * |
890 | * If old_state == completed: | |
891 | * This request completed from the SCU hardware perspective | |
892 | * and now just needs cleaning up in terms of freeing the | |
893 | * request and potentially calling up to libsas. | |
6f231dda DW |
894 | */ |
895 | isci_terminate_request_core(isci_host, isci_device, | |
cbb65c66 | 896 | isci_request); |
a5fde225 | 897 | } |
6f231dda DW |
898 | } |
899 | ||
900 | /** | |
901 | * isci_terminate_pending_requests() - This function will change the all of the | |
902 | * requests on the given device's state to "aborting", will terminate the | |
903 | * requests, and wait for them to complete. This function must only be | |
904 | * called from a thread that can wait. Note that the requests are all | |
905 | * terminated and completed (back to the host, if started there). | |
906 | * @isci_host: This parameter specifies SCU. | |
907 | * @isci_device: This parameter specifies the target. | |
908 | * | |
909 | * | |
910 | */ | |
911 | void isci_terminate_pending_requests( | |
912 | struct isci_host *isci_host, | |
913 | struct isci_remote_device *isci_device, | |
914 | enum isci_request_status new_request_state) | |
915 | { | |
4dc043c4 JS |
916 | struct isci_request *request; |
917 | struct isci_request *next_request; | |
918 | unsigned long flags; | |
919 | struct list_head aborted_request_list; | |
920 | ||
921 | INIT_LIST_HEAD(&aborted_request_list); | |
6f231dda DW |
922 | |
923 | dev_dbg(&isci_host->pdev->dev, | |
924 | "%s: isci_device = %p (new request state = %d)\n", | |
925 | __func__, isci_device, new_request_state); | |
926 | ||
4dc043c4 | 927 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
6f231dda | 928 | |
4dc043c4 JS |
929 | /* Move all of the pending requests off of the device list. */ |
930 | list_splice_init(&isci_device->reqs_in_process, | |
931 | &aborted_request_list); | |
6f231dda | 932 | |
4dc043c4 | 933 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
6f231dda | 934 | |
4dc043c4 JS |
935 | /* Iterate through the now-local list. */ |
936 | list_for_each_entry_safe(request, next_request, | |
937 | &aborted_request_list, dev_node) { | |
6f231dda | 938 | |
4dc043c4 JS |
939 | dev_warn(&isci_host->pdev->dev, |
940 | "%s: isci_device=%p request=%p; task=%p\n", | |
941 | __func__, | |
942 | isci_device, request, | |
943 | ((request->ttype == io_task) | |
944 | ? isci_request_access_task(request) | |
945 | : NULL)); | |
946 | ||
947 | /* Mark all still pending I/O with the selected next | |
948 | * state, terminate and free it. | |
949 | */ | |
950 | isci_terminate_request(isci_host, isci_device, | |
951 | request, new_request_state | |
952 | ); | |
953 | } | |
6f231dda DW |
954 | } |
955 | ||
956 | /** | |
957 | * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain | |
958 | * Template functions. | |
959 | * @lun: This parameter specifies the lun to be reset. | |
960 | * | |
961 | * status, zero indicates success. | |
962 | */ | |
963 | static int isci_task_send_lu_reset_sas( | |
964 | struct isci_host *isci_host, | |
965 | struct isci_remote_device *isci_device, | |
966 | u8 *lun) | |
967 | { | |
968 | struct isci_tmf tmf; | |
969 | int ret = TMF_RESP_FUNC_FAILED; | |
970 | ||
971 | dev_dbg(&isci_host->pdev->dev, | |
972 | "%s: isci_host = %p, isci_device = %p\n", | |
973 | __func__, isci_host, isci_device); | |
974 | /* Send the LUN reset to the target. By the time the call returns, | |
975 | * the TMF has fully exected in the target (in which case the return | |
976 | * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or | |
977 | * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED"). | |
978 | */ | |
979 | isci_task_build_tmf(&tmf, isci_device, isci_tmf_ssp_lun_reset, NULL, | |
980 | NULL); | |
981 | ||
982 | #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */ | |
983 | ret = isci_task_execute_tmf(isci_host, &tmf, ISCI_LU_RESET_TIMEOUT_MS); | |
984 | ||
985 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
986 | dev_dbg(&isci_host->pdev->dev, | |
987 | "%s: %p: TMF_LU_RESET passed\n", | |
988 | __func__, isci_device); | |
989 | else | |
990 | dev_dbg(&isci_host->pdev->dev, | |
991 | "%s: %p: TMF_LU_RESET failed (%x)\n", | |
992 | __func__, isci_device, ret); | |
993 | ||
994 | return ret; | |
995 | } | |
996 | ||
997 | /** | |
998 | * isci_task_lu_reset() - This function is one of the SAS Domain Template | |
999 | * functions. This is one of the Task Management functoins called by libsas, | |
1000 | * to reset the given lun. Note the assumption that while this call is | |
1001 | * executing, no I/O will be sent by the host to the device. | |
1002 | * @lun: This parameter specifies the lun to be reset. | |
1003 | * | |
1004 | * status, zero indicates success. | |
1005 | */ | |
1006 | int isci_task_lu_reset( | |
1007 | struct domain_device *domain_device, | |
1008 | u8 *lun) | |
1009 | { | |
1010 | struct isci_host *isci_host = NULL; | |
1011 | struct isci_remote_device *isci_device = NULL; | |
1012 | int ret; | |
1013 | bool device_stopping = false; | |
1014 | ||
1015 | if (domain_device == NULL) { | |
1016 | pr_warn("%s: domain_device == NULL\n", __func__); | |
1017 | return TMF_RESP_FUNC_FAILED; | |
1018 | } | |
1019 | ||
1020 | isci_device = isci_dev_from_domain_dev(domain_device); | |
1021 | ||
1022 | if (domain_device->port != NULL) | |
1023 | isci_host = isci_host_from_sas_ha(domain_device->port->ha); | |
1024 | ||
1025 | pr_debug("%s: domain_device=%p, isci_host=%p; isci_device=%p\n", | |
1026 | __func__, domain_device, isci_host, isci_device); | |
1027 | ||
1028 | if (isci_device != NULL) | |
1029 | device_stopping = (isci_device->status == isci_stopping) | |
1030 | || (isci_device->status == isci_stopped); | |
1031 | ||
1032 | /* If there is a device reset pending on any request in the | |
1033 | * device's list, fail this LUN reset request in order to | |
1034 | * escalate to the device reset. | |
1035 | */ | |
1036 | if ((isci_device == NULL) || | |
1037 | (isci_host == NULL) || | |
1038 | ((isci_host != NULL) && | |
1039 | (isci_device != NULL) && | |
1040 | (device_stopping || | |
1041 | (isci_device_is_reset_pending(isci_host, isci_device))))) { | |
1042 | dev_warn(&isci_host->pdev->dev, | |
1043 | "%s: No dev (%p), no host (%p), or " | |
1044 | "RESET PENDING: domain_device=%p\n", | |
1045 | __func__, isci_device, isci_host, domain_device); | |
1046 | return TMF_RESP_FUNC_FAILED; | |
1047 | } | |
1048 | ||
6f231dda DW |
1049 | /* Send the task management part of the reset. */ |
1050 | if (sas_protocol_ata(domain_device->tproto)) { | |
1051 | ret = isci_task_send_lu_reset_sata( | |
1052 | isci_host, isci_device, lun | |
1053 | ); | |
1054 | } else | |
1055 | ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun); | |
1056 | ||
1057 | /* If the LUN reset worked, all the I/O can now be terminated. */ | |
1058 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
1059 | /* Terminate all I/O now. */ | |
1060 | isci_terminate_pending_requests(isci_host, | |
1061 | isci_device, | |
1062 | terminating); | |
1063 | ||
6f231dda DW |
1064 | return ret; |
1065 | } | |
1066 | ||
1067 | ||
1068 | /* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */ | |
1069 | int isci_task_clear_nexus_port(struct asd_sas_port *port) | |
1070 | { | |
1071 | return TMF_RESP_FUNC_FAILED; | |
1072 | } | |
1073 | ||
1074 | ||
1075 | ||
1076 | int isci_task_clear_nexus_ha(struct sas_ha_struct *ha) | |
1077 | { | |
1078 | return TMF_RESP_FUNC_FAILED; | |
1079 | } | |
1080 | ||
1081 | int isci_task_I_T_nexus_reset(struct domain_device *dev) | |
1082 | { | |
1083 | return TMF_RESP_FUNC_FAILED; | |
1084 | } | |
1085 | ||
1086 | ||
1087 | /* Task Management Functions. Must be called from process context. */ | |
1088 | ||
1089 | /** | |
1090 | * isci_abort_task_process_cb() - This is a helper function for the abort task | |
1091 | * TMF command. It manages the request state with respect to the successful | |
1092 | * transmission / completion of the abort task request. | |
1093 | * @cb_state: This parameter specifies when this function was called - after | |
1094 | * the TMF request has been started and after it has timed-out. | |
1095 | * @tmf: This parameter specifies the TMF in progress. | |
1096 | * | |
1097 | * | |
1098 | */ | |
1099 | static void isci_abort_task_process_cb( | |
1100 | enum isci_tmf_cb_state cb_state, | |
1101 | struct isci_tmf *tmf, | |
1102 | void *cb_data) | |
1103 | { | |
1104 | struct isci_request *old_request; | |
1105 | ||
1106 | old_request = (struct isci_request *)cb_data; | |
1107 | ||
1108 | dev_dbg(&old_request->isci_host->pdev->dev, | |
1109 | "%s: tmf=%p, old_request=%p\n", | |
1110 | __func__, tmf, old_request); | |
1111 | ||
1112 | switch (cb_state) { | |
1113 | ||
1114 | case isci_tmf_started: | |
1115 | /* The TMF has been started. Nothing to do here, since the | |
1116 | * request state was already set to "aborted" by the abort | |
1117 | * task function. | |
1118 | */ | |
70957a94 JS |
1119 | BUG_ON((old_request->status != aborted) |
1120 | && (old_request->status != completed)); | |
6f231dda DW |
1121 | break; |
1122 | ||
1123 | case isci_tmf_timed_out: | |
1124 | ||
1125 | /* Set the task's state to "aborting", since the abort task | |
1126 | * function thread set it to "aborted" (above) in anticipation | |
1127 | * of the task management request working correctly. Since the | |
1128 | * timeout has now fired, the TMF request failed. We set the | |
1129 | * state such that the request completion will indicate the | |
1130 | * device is no longer present. | |
1131 | */ | |
1132 | isci_request_change_state(old_request, aborting); | |
1133 | break; | |
1134 | ||
1135 | default: | |
1136 | dev_err(&old_request->isci_host->pdev->dev, | |
1137 | "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n", | |
1138 | __func__, cb_state, tmf, old_request); | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | /** | |
1144 | * isci_task_abort_task() - This function is one of the SAS Domain Template | |
1145 | * functions. This function is called by libsas to abort a specified task. | |
1146 | * @task: This parameter specifies the SAS task to abort. | |
1147 | * | |
1148 | * status, zero indicates success. | |
1149 | */ | |
1150 | int isci_task_abort_task(struct sas_task *task) | |
1151 | { | |
1152 | DECLARE_COMPLETION_ONSTACK(aborted_io_completion); | |
a5fde225 JS |
1153 | struct isci_request *old_request = NULL; |
1154 | enum isci_request_status old_state; | |
6f231dda | 1155 | struct isci_remote_device *isci_device = NULL; |
a5fde225 JS |
1156 | struct isci_host *isci_host = NULL; |
1157 | struct isci_tmf tmf; | |
1158 | int ret = TMF_RESP_FUNC_FAILED; | |
1159 | unsigned long flags; | |
1160 | bool any_dev_reset = false; | |
1161 | bool device_stopping; | |
6f231dda DW |
1162 | |
1163 | /* Get the isci_request reference from the task. Note that | |
1164 | * this check does not depend on the pending request list | |
1165 | * in the device, because tasks driving resets may land here | |
1166 | * after completion in the core. | |
1167 | */ | |
1168 | old_request = isci_task_get_request_from_task(task, &isci_host, | |
1169 | &isci_device); | |
1170 | ||
1171 | dev_dbg(&isci_host->pdev->dev, | |
1172 | "%s: task = %p\n", __func__, task); | |
1173 | ||
1174 | /* Check if the device has been / is currently being removed. | |
1175 | * If so, no task management will be done, and the I/O will | |
1176 | * be terminated. | |
1177 | */ | |
1178 | device_stopping = (isci_device->status == isci_stopping) | |
1179 | || (isci_device->status == isci_stopped); | |
1180 | ||
6f231dda DW |
1181 | /* This version of the driver will fail abort requests for |
1182 | * SATA/STP. Failing the abort request this way will cause the | |
1183 | * SCSI error handler thread to escalate to LUN reset | |
1184 | */ | |
1185 | if (sas_protocol_ata(task->task_proto) && !device_stopping) { | |
1186 | dev_warn(&isci_host->pdev->dev, | |
1187 | " task %p is for a STP/SATA device;" | |
1188 | " returning TMF_RESP_FUNC_FAILED\n" | |
1189 | " to cause a LUN reset...\n", task); | |
1190 | return TMF_RESP_FUNC_FAILED; | |
1191 | } | |
1192 | ||
1193 | dev_dbg(&isci_host->pdev->dev, | |
1194 | "%s: old_request == %p\n", __func__, old_request); | |
1195 | ||
a5fde225 JS |
1196 | if (!device_stopping) |
1197 | any_dev_reset = isci_device_is_reset_pending(isci_host,isci_device); | |
1198 | ||
6f231dda DW |
1199 | spin_lock_irqsave(&task->task_state_lock, flags); |
1200 | ||
1201 | /* Don't do resets to stopping devices. */ | |
a5fde225 | 1202 | if (device_stopping) { |
6f231dda | 1203 | |
a5fde225 JS |
1204 | task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET; |
1205 | any_dev_reset = false; | |
6f231dda | 1206 | |
a5fde225 | 1207 | } else /* See if there is a pending device reset for this device. */ |
6f231dda | 1208 | any_dev_reset = any_dev_reset |
a5fde225 | 1209 | || (task->task_state_flags & SAS_TASK_NEED_DEV_RESET); |
6f231dda DW |
1210 | |
1211 | /* If the extraction of the request reference from the task | |
1212 | * failed, then the request has been completed (or if there is a | |
1213 | * pending reset then this abort request function must be failed | |
1214 | * in order to escalate to the target reset). | |
1215 | */ | |
a5fde225 | 1216 | if ((old_request == NULL) || any_dev_reset) { |
6f231dda DW |
1217 | |
1218 | /* If the device reset task flag is set, fail the task | |
1219 | * management request. Otherwise, the original request | |
1220 | * has completed. | |
1221 | */ | |
1222 | if (any_dev_reset) { | |
1223 | ||
1224 | /* Turn off the task's DONE to make sure this | |
1225 | * task is escalated to a target reset. | |
1226 | */ | |
1227 | task->task_state_flags &= ~SAS_TASK_STATE_DONE; | |
1228 | ||
a5fde225 JS |
1229 | /* Make the reset happen as soon as possible. */ |
1230 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
1231 | ||
1232 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1233 | ||
6f231dda DW |
1234 | /* Fail the task management request in order to |
1235 | * escalate to the target reset. | |
1236 | */ | |
1237 | ret = TMF_RESP_FUNC_FAILED; | |
1238 | ||
1239 | dev_dbg(&isci_host->pdev->dev, | |
1240 | "%s: Failing task abort in order to " | |
1241 | "escalate to target reset because\n" | |
1242 | "SAS_TASK_NEED_DEV_RESET is set for " | |
1243 | "task %p on dev %p\n", | |
1244 | __func__, task, isci_device); | |
1245 | ||
6f231dda | 1246 | |
a5fde225 | 1247 | } else { |
6f231dda DW |
1248 | /* The request has already completed and there |
1249 | * is nothing to do here other than to set the task | |
1250 | * done bit, and indicate that the task abort function | |
1251 | * was sucessful. | |
1252 | */ | |
1253 | isci_set_task_doneflags(task); | |
1254 | ||
a5fde225 | 1255 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
6f231dda | 1256 | |
a5fde225 | 1257 | ret = TMF_RESP_FUNC_COMPLETE; |
6f231dda | 1258 | |
a5fde225 JS |
1259 | dev_dbg(&isci_host->pdev->dev, |
1260 | "%s: abort task not needed for %p\n", | |
1261 | __func__, task); | |
6f231dda | 1262 | } |
6f231dda DW |
1263 | |
1264 | return ret; | |
1265 | } | |
a5fde225 JS |
1266 | else |
1267 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
6f231dda DW |
1268 | |
1269 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
1270 | ||
a5fde225 JS |
1271 | /* Check the request status and change to "aborting" if currently |
1272 | * "starting"; if true then set the I/O kernel completion | |
6f231dda DW |
1273 | * struct that will be triggered when the request completes. |
1274 | */ | |
a5fde225 JS |
1275 | old_state = isci_task_validate_request_to_abort( |
1276 | old_request, isci_host, isci_device, | |
1277 | &aborted_io_completion); | |
1278 | if ((old_state != started) && (old_state != completed)) { | |
6f231dda DW |
1279 | |
1280 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1281 | ||
a5fde225 JS |
1282 | /* The request was already being handled by someone else (because |
1283 | * they got to set the state away from started). | |
1284 | */ | |
1285 | dev_dbg(&isci_host->pdev->dev, | |
1286 | "%s: device = %p; old_request %p already being aborted\n", | |
1287 | __func__, | |
1288 | isci_device, old_request); | |
6f231dda DW |
1289 | |
1290 | return TMF_RESP_FUNC_COMPLETE; | |
1291 | } | |
a5fde225 JS |
1292 | if ((task->task_proto == SAS_PROTOCOL_SMP) |
1293 | || device_stopping | |
1294 | || old_request->complete_in_target | |
1295 | ) { | |
6f231dda DW |
1296 | |
1297 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1298 | ||
a5fde225 JS |
1299 | dev_dbg(&isci_host->pdev->dev, |
1300 | "%s: SMP request (%d)" | |
1301 | " or device is stopping (%d)" | |
1302 | " or complete_in_target (%d), thus no TMF\n", | |
1303 | __func__, (task->task_proto == SAS_PROTOCOL_SMP), | |
1304 | device_stopping, old_request->complete_in_target); | |
1305 | ||
6f231dda DW |
1306 | /* Set the state on the task. */ |
1307 | isci_task_all_done(task); | |
1308 | ||
1309 | ret = TMF_RESP_FUNC_COMPLETE; | |
1310 | ||
1311 | /* Stopping and SMP devices are not sent a TMF, and are not | |
a5fde225 | 1312 | * reset, but the outstanding I/O request is terminated below. |
6f231dda | 1313 | */ |
6f231dda DW |
1314 | } else { |
1315 | /* Fill in the tmf stucture */ | |
c3f42feb JS |
1316 | isci_task_build_abort_task_tmf(&tmf, isci_device, |
1317 | isci_tmf_ssp_task_abort, | |
1318 | isci_abort_task_process_cb, | |
1319 | old_request); | |
6f231dda | 1320 | |
6f231dda DW |
1321 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
1322 | ||
1323 | #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */ | |
1324 | ret = isci_task_execute_tmf(isci_host, &tmf, | |
1325 | ISCI_ABORT_TASK_TIMEOUT_MS); | |
1326 | ||
a5fde225 | 1327 | if (ret != TMF_RESP_FUNC_COMPLETE) |
6f231dda DW |
1328 | dev_err(&isci_host->pdev->dev, |
1329 | "%s: isci_task_send_tmf failed\n", | |
1330 | __func__); | |
1331 | } | |
a5fde225 JS |
1332 | if (ret == TMF_RESP_FUNC_COMPLETE) { |
1333 | old_request->complete_in_target = true; | |
1334 | ||
1335 | /* Clean up the request on our side, and wait for the aborted I/O to | |
1336 | * complete. | |
1337 | */ | |
cbb65c66 | 1338 | isci_terminate_request_core(isci_host, isci_device, old_request); |
a5fde225 | 1339 | } |
6f231dda | 1340 | |
a5fde225 JS |
1341 | /* Make sure we do not leave a reference to aborted_io_completion */ |
1342 | old_request->io_request_completion = NULL; | |
6f231dda DW |
1343 | return ret; |
1344 | } | |
1345 | ||
1346 | /** | |
1347 | * isci_task_abort_task_set() - This function is one of the SAS Domain Template | |
1348 | * functions. This is one of the Task Management functoins called by libsas, | |
1349 | * to abort all task for the given lun. | |
1350 | * @d_device: This parameter specifies the domain device associated with this | |
1351 | * request. | |
1352 | * @lun: This parameter specifies the lun associated with this request. | |
1353 | * | |
1354 | * status, zero indicates success. | |
1355 | */ | |
1356 | int isci_task_abort_task_set( | |
1357 | struct domain_device *d_device, | |
1358 | u8 *lun) | |
1359 | { | |
1360 | return TMF_RESP_FUNC_FAILED; | |
1361 | } | |
1362 | ||
1363 | ||
1364 | /** | |
1365 | * isci_task_clear_aca() - This function is one of the SAS Domain Template | |
1366 | * functions. This is one of the Task Management functoins called by libsas. | |
1367 | * @d_device: This parameter specifies the domain device associated with this | |
1368 | * request. | |
1369 | * @lun: This parameter specifies the lun associated with this request. | |
1370 | * | |
1371 | * status, zero indicates success. | |
1372 | */ | |
1373 | int isci_task_clear_aca( | |
1374 | struct domain_device *d_device, | |
1375 | u8 *lun) | |
1376 | { | |
1377 | return TMF_RESP_FUNC_FAILED; | |
1378 | } | |
1379 | ||
1380 | ||
1381 | ||
1382 | /** | |
1383 | * isci_task_clear_task_set() - This function is one of the SAS Domain Template | |
1384 | * functions. This is one of the Task Management functoins called by libsas. | |
1385 | * @d_device: This parameter specifies the domain device associated with this | |
1386 | * request. | |
1387 | * @lun: This parameter specifies the lun associated with this request. | |
1388 | * | |
1389 | * status, zero indicates success. | |
1390 | */ | |
1391 | int isci_task_clear_task_set( | |
1392 | struct domain_device *d_device, | |
1393 | u8 *lun) | |
1394 | { | |
1395 | return TMF_RESP_FUNC_FAILED; | |
1396 | } | |
1397 | ||
1398 | ||
1399 | /** | |
1400 | * isci_task_query_task() - This function is implemented to cause libsas to | |
1401 | * correctly escalate the failed abort to a LUN or target reset (this is | |
1402 | * because sas_scsi_find_task libsas function does not correctly interpret | |
1403 | * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is | |
1404 | * returned, libsas turns this into a LUN reset; when FUNC_FAILED is | |
1405 | * returned, libsas will turn this into a target reset | |
1406 | * @task: This parameter specifies the sas task being queried. | |
1407 | * @lun: This parameter specifies the lun associated with this request. | |
1408 | * | |
1409 | * status, zero indicates success. | |
1410 | */ | |
1411 | int isci_task_query_task( | |
1412 | struct sas_task *task) | |
1413 | { | |
1414 | /* See if there is a pending device reset for this device. */ | |
1415 | if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) | |
1416 | return TMF_RESP_FUNC_FAILED; | |
1417 | else | |
1418 | return TMF_RESP_FUNC_SUCC; | |
1419 | } | |
1420 | ||
1421 | /** | |
1422 | * isci_task_request_complete() - This function is called by the sci core when | |
1423 | * an task request completes. | |
1424 | * @isci_host: This parameter specifies the ISCI host object | |
1425 | * @request: This parameter is the completed isci_request object. | |
1426 | * @completion_status: This parameter specifies the completion status from the | |
1427 | * sci core. | |
1428 | * | |
1429 | * none. | |
1430 | */ | |
1431 | void isci_task_request_complete( | |
1432 | struct isci_host *isci_host, | |
1433 | struct isci_request *request, | |
1434 | enum sci_task_status completion_status) | |
1435 | { | |
1436 | struct isci_remote_device *isci_device = request->isci_device; | |
1437 | enum isci_request_status old_state; | |
1438 | struct isci_tmf *tmf = isci_request_access_tmf(request); | |
1439 | struct completion *tmf_complete; | |
1440 | ||
1441 | dev_dbg(&isci_host->pdev->dev, | |
1442 | "%s: request = %p, status=%d\n", | |
1443 | __func__, request, completion_status); | |
1444 | ||
1445 | old_state = isci_request_change_state(request, completed); | |
1446 | ||
1447 | tmf->status = completion_status; | |
1448 | request->complete_in_target = true; | |
1449 | ||
1450 | if (SAS_PROTOCOL_SSP == tmf->proto) { | |
1451 | ||
1452 | memcpy(&tmf->resp.resp_iu, | |
1453 | scic_io_request_get_response_iu_address( | |
1454 | request->sci_request_handle | |
1455 | ), | |
1456 | sizeof(struct sci_ssp_response_iu)); | |
1457 | ||
1458 | } else if (SAS_PROTOCOL_SATA == tmf->proto) { | |
1459 | ||
1460 | memcpy(&tmf->resp.d2h_fis, | |
1461 | scic_stp_io_request_get_d2h_reg_address( | |
1462 | request->sci_request_handle | |
1463 | ), | |
1464 | sizeof(struct sata_fis_reg_d2h) | |
1465 | ); | |
1466 | } | |
1467 | ||
1468 | /* Manage the timer if it is still running. */ | |
1469 | if (tmf->timeout_timer) { | |
7c40a803 | 1470 | isci_del_timer(isci_host, tmf->timeout_timer); |
6f231dda DW |
1471 | tmf->timeout_timer = NULL; |
1472 | } | |
1473 | ||
1474 | /* PRINT_TMF( ((struct isci_tmf *)request->task)); */ | |
1475 | tmf_complete = tmf->complete; | |
1476 | ||
1477 | scic_controller_complete_task( | |
1478 | isci_host->core_controller, | |
3a97eec6 | 1479 | to_sci_dev(isci_device), |
6f231dda DW |
1480 | request->sci_request_handle |
1481 | ); | |
1482 | /* NULL the request handle to make sure it cannot be terminated | |
1483 | * or completed again. | |
1484 | */ | |
1485 | request->sci_request_handle = NULL; | |
1486 | ||
1487 | isci_request_change_state(request, unallocated); | |
1488 | list_del_init(&request->dev_node); | |
1489 | ||
1490 | /* The task management part completes last. */ | |
1491 | complete(tmf_complete); | |
1492 | } | |
1493 | ||
1494 | ||
1495 | /** | |
1496 | * isci_task_ssp_request_get_lun() - This function is called by the sci core to | |
1497 | * retrieve the lun for a given task request. | |
1498 | * @request: This parameter is the isci_request object. | |
1499 | * | |
1500 | * lun for specified task request. | |
1501 | */ | |
1502 | u32 isci_task_ssp_request_get_lun(struct isci_request *request) | |
1503 | { | |
1504 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1505 | ||
1506 | dev_dbg(&request->isci_host->pdev->dev, | |
1507 | "%s: lun = %d\n", __func__, isci_tmf->lun[0]); | |
1508 | /* @todo: build lun from array of bytes to 32 bit */ | |
1509 | return isci_tmf->lun[0]; | |
1510 | } | |
1511 | ||
1512 | /** | |
1513 | * isci_task_ssp_request_get_function() - This function is called by the sci | |
1514 | * core to retrieve the function for a given task request. | |
1515 | * @request: This parameter is the isci_request object. | |
1516 | * | |
1517 | * function code for specified task request. | |
1518 | */ | |
1519 | u8 isci_task_ssp_request_get_function(struct isci_request *request) | |
1520 | { | |
1521 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1522 | ||
1523 | dev_dbg(&request->isci_host->pdev->dev, | |
1524 | "%s: func = %d\n", __func__, isci_tmf->tmf_code); | |
1525 | ||
1526 | return isci_tmf->tmf_code; | |
1527 | } | |
1528 | ||
1529 | /** | |
1530 | * isci_task_ssp_request_get_io_tag_to_manage() - This function is called by | |
1531 | * the sci core to retrieve the io tag for a given task request. | |
1532 | * @request: This parameter is the isci_request object. | |
1533 | * | |
1534 | * io tag for specified task request. | |
1535 | */ | |
1536 | u16 isci_task_ssp_request_get_io_tag_to_manage(struct isci_request *request) | |
1537 | { | |
1538 | u16 io_tag = SCI_CONTROLLER_INVALID_IO_TAG; | |
1539 | ||
1540 | if (tmf_task == request->ttype) { | |
1541 | struct isci_tmf *tmf = isci_request_access_tmf(request); | |
1542 | io_tag = tmf->io_tag; | |
1543 | } | |
1544 | ||
1545 | dev_dbg(&request->isci_host->pdev->dev, | |
1546 | "%s: request = %p, io_tag = %d\n", | |
1547 | __func__, request, io_tag); | |
1548 | ||
1549 | return io_tag; | |
1550 | } | |
1551 | ||
1552 | /** | |
1553 | * isci_task_ssp_request_get_response_data_address() - This function is called | |
1554 | * by the sci core to retrieve the response data address for a given task | |
1555 | * request. | |
1556 | * @request: This parameter is the isci_request object. | |
1557 | * | |
1558 | * response data address for specified task request. | |
1559 | */ | |
1560 | void *isci_task_ssp_request_get_response_data_address( | |
1561 | struct isci_request *request) | |
1562 | { | |
1563 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1564 | ||
1565 | return &isci_tmf->resp.resp_iu; | |
1566 | } | |
1567 | ||
1568 | /** | |
1569 | * isci_task_ssp_request_get_response_data_length() - This function is called | |
1570 | * by the sci core to retrieve the response data length for a given task | |
1571 | * request. | |
1572 | * @request: This parameter is the isci_request object. | |
1573 | * | |
1574 | * response data length for specified task request. | |
1575 | */ | |
1576 | u32 isci_task_ssp_request_get_response_data_length( | |
1577 | struct isci_request *request) | |
1578 | { | |
1579 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1580 | ||
1581 | return sizeof(isci_tmf->resp.resp_iu); | |
1582 | } | |
1583 | ||
1584 | /** | |
1585 | * isci_bus_reset_handler() - This function performs a target reset of the | |
1586 | * device referenced by "cmd'. This function is exported through the | |
1587 | * "struct scsi_host_template" structure such that it is called when an I/O | |
1588 | * recovery process has escalated to a target reset. Note that this function | |
1589 | * is called from the scsi error handler event thread, so may block on calls. | |
1590 | * @scsi_cmd: This parameter specifies the target to be reset. | |
1591 | * | |
1592 | * SUCCESS if the reset process was successful, else FAILED. | |
1593 | */ | |
1594 | int isci_bus_reset_handler(struct scsi_cmnd *cmd) | |
1595 | { | |
1596 | unsigned long flags = 0; | |
1597 | struct isci_host *isci_host = NULL; | |
1598 | enum sci_status status; | |
1599 | int base_status; | |
1600 | struct isci_remote_device *isci_dev | |
1601 | = isci_dev_from_domain_dev( | |
1602 | sdev_to_domain_dev(cmd->device)); | |
1603 | ||
1604 | dev_dbg(&cmd->device->sdev_gendev, | |
1605 | "%s: cmd %p, isci_dev %p\n", | |
1606 | __func__, cmd, isci_dev); | |
1607 | ||
1608 | if (!isci_dev) { | |
1609 | dev_warn(&cmd->device->sdev_gendev, | |
1610 | "%s: isci_dev is GONE!\n", | |
1611 | __func__); | |
1612 | ||
1613 | return TMF_RESP_FUNC_COMPLETE; /* Nothing to reset. */ | |
1614 | } | |
1615 | ||
1616 | if (isci_dev->isci_port != NULL) | |
1617 | isci_host = isci_dev->isci_port->isci_host; | |
1618 | ||
1619 | if (isci_host != NULL) | |
1620 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
1621 | ||
3a97eec6 | 1622 | status = scic_remote_device_reset(to_sci_dev(isci_dev)); |
6f231dda DW |
1623 | if (status != SCI_SUCCESS) { |
1624 | ||
1625 | if (isci_host != NULL) | |
1626 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1627 | ||
1628 | scmd_printk(KERN_WARNING, cmd, | |
1629 | "%s: scic_remote_device_reset(%p) returned %d!\n", | |
1630 | __func__, isci_dev, status); | |
1631 | ||
1632 | return TMF_RESP_FUNC_FAILED; | |
1633 | } | |
1634 | if (isci_host != NULL) | |
1635 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1636 | ||
6f231dda DW |
1637 | /* Make sure all pending requests are able to be fully terminated. */ |
1638 | isci_device_clear_reset_pending(isci_dev); | |
1639 | ||
1640 | /* Terminate in-progress I/O now. */ | |
1641 | isci_remote_device_nuke_requests(isci_dev); | |
1642 | ||
1643 | /* Call into the libsas default handler (which calls sas_phy_reset). */ | |
1644 | base_status = sas_eh_bus_reset_handler(cmd); | |
1645 | ||
1646 | if (base_status != SUCCESS) { | |
1647 | ||
1648 | /* There can be cases where the resets to individual devices | |
1649 | * behind an expander will fail because of an unplug of the | |
1650 | * expander itself. | |
1651 | */ | |
1652 | scmd_printk(KERN_WARNING, cmd, | |
1653 | "%s: sas_eh_bus_reset_handler(%p) returned %d!\n", | |
1654 | __func__, cmd, base_status); | |
1655 | } | |
1656 | ||
1657 | /* WHAT TO DO HERE IF sas_phy_reset FAILS? */ | |
1658 | ||
1659 | if (isci_host != NULL) | |
1660 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
3a97eec6 | 1661 | status = scic_remote_device_reset_complete(to_sci_dev(isci_dev)); |
6f231dda DW |
1662 | |
1663 | if (isci_host != NULL) | |
1664 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1665 | ||
1666 | if (status != SCI_SUCCESS) { | |
1667 | scmd_printk(KERN_WARNING, cmd, | |
1668 | "%s: scic_remote_device_reset_complete(%p) " | |
1669 | "returned %d!\n", | |
1670 | __func__, isci_dev, status); | |
1671 | } | |
1672 | /* WHAT TO DO HERE IF scic_remote_device_reset_complete FAILS? */ | |
1673 | ||
1674 | dev_dbg(&cmd->device->sdev_gendev, | |
1675 | "%s: cmd %p, isci_dev %p complete.\n", | |
1676 | __func__, cmd, isci_dev); | |
1677 | ||
6f231dda DW |
1678 | return TMF_RESP_FUNC_COMPLETE; |
1679 | } |