Commit | Line | Data |
---|---|---|
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> | |
50e7f9b5 | 57 | #include <linux/irqflags.h> |
6f231dda DW |
58 | #include "scic_task_request.h" |
59 | #include "scic_remote_device.h" | |
60 | #include "scic_io_request.h" | |
61 | #include "scic_sds_remote_device.h" | |
62 | #include "scic_sds_remote_node_context.h" | |
63 | #include "isci.h" | |
64 | #include "request.h" | |
65 | #include "sata.h" | |
66 | #include "task.h" | |
67 | ||
50e7f9b5 | 68 | /** |
1077a574 DW |
69 | * isci_task_refuse() - complete the request to the upper layer driver in |
70 | * the case where an I/O needs to be completed back in the submit path. | |
71 | * @ihost: host on which the the request was queued | |
72 | * @task: request to complete | |
73 | * @response: response code for the completed task. | |
74 | * @status: status code for the completed task. | |
50e7f9b5 | 75 | * |
50e7f9b5 | 76 | */ |
1077a574 DW |
77 | static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task, |
78 | enum service_response response, | |
79 | enum exec_status status) | |
80 | ||
50e7f9b5 | 81 | { |
1077a574 | 82 | enum isci_completion_selection disposition; |
50e7f9b5 | 83 | |
1077a574 DW |
84 | disposition = isci_perform_normal_io_completion; |
85 | disposition = isci_task_set_completion_status(task, response, status, | |
86 | disposition); | |
50e7f9b5 DW |
87 | |
88 | /* Tasks aborted specifically by a call to the lldd_abort_task | |
1077a574 DW |
89 | * function should not be completed to the host in the regular path. |
90 | */ | |
91 | switch (disposition) { | |
50e7f9b5 DW |
92 | case isci_perform_normal_io_completion: |
93 | /* Normal notification (task_done) */ | |
1077a574 | 94 | dev_dbg(&ihost->pdev->dev, |
ed8a72d1 JS |
95 | "%s: Normal - task = %p, response=%d, " |
96 | "status=%d\n", | |
50e7f9b5 DW |
97 | __func__, task, response, status); |
98 | ||
1077a574 | 99 | task->lldd_task = NULL; |
50e7f9b5 | 100 | |
ed8a72d1 | 101 | isci_execpath_callback(ihost, task, task->task_done); |
50e7f9b5 DW |
102 | break; |
103 | ||
104 | case isci_perform_aborted_io_completion: | |
105 | /* No notification because this request is already in the | |
106 | * abort path. | |
107 | */ | |
1077a574 | 108 | dev_warn(&ihost->pdev->dev, |
ed8a72d1 JS |
109 | "%s: Aborted - task = %p, response=%d, " |
110 | "status=%d\n", | |
50e7f9b5 DW |
111 | __func__, task, response, status); |
112 | break; | |
113 | ||
114 | case isci_perform_error_io_completion: | |
115 | /* Use sas_task_abort */ | |
1077a574 | 116 | dev_warn(&ihost->pdev->dev, |
ed8a72d1 JS |
117 | "%s: Error - task = %p, response=%d, " |
118 | "status=%d\n", | |
50e7f9b5 | 119 | __func__, task, response, status); |
ed8a72d1 JS |
120 | |
121 | isci_execpath_callback(ihost, task, sas_task_abort); | |
50e7f9b5 DW |
122 | break; |
123 | ||
124 | default: | |
1077a574 | 125 | dev_warn(&ihost->pdev->dev, |
50e7f9b5 DW |
126 | "%s: isci task notification default case!", |
127 | __func__); | |
128 | sas_task_abort(task); | |
129 | break; | |
130 | } | |
131 | } | |
6f231dda | 132 | |
1077a574 DW |
133 | #define for_each_sas_task(num, task) \ |
134 | for (; num > 0; num--,\ | |
135 | task = list_entry(task->list.next, struct sas_task, list)) | |
136 | ||
6f231dda DW |
137 | /** |
138 | * isci_task_execute_task() - This function is one of the SAS Domain Template | |
139 | * functions. This function is called by libsas to send a task down to | |
140 | * hardware. | |
141 | * @task: This parameter specifies the SAS task to send. | |
142 | * @num: This parameter specifies the number of tasks to queue. | |
143 | * @gfp_flags: This parameter specifies the context of this call. | |
144 | * | |
145 | * status, zero indicates success. | |
146 | */ | |
147 | int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags) | |
148 | { | |
4393aa4e | 149 | struct isci_host *ihost = dev_to_ihost(task->dev); |
6f231dda DW |
150 | struct isci_request *request = NULL; |
151 | struct isci_remote_device *device; | |
152 | unsigned long flags; | |
6f231dda DW |
153 | int ret; |
154 | enum sci_status status; | |
f0846c68 | 155 | enum isci_status device_status; |
6f231dda | 156 | |
1077a574 | 157 | dev_dbg(&ihost->pdev->dev, "%s: num=%d\n", __func__, num); |
6f231dda DW |
158 | |
159 | /* Check if we have room for more tasks */ | |
1077a574 | 160 | ret = isci_host_can_queue(ihost, num); |
6f231dda DW |
161 | |
162 | if (ret) { | |
1077a574 | 163 | dev_warn(&ihost->pdev->dev, "%s: queue full\n", __func__); |
6f231dda DW |
164 | return ret; |
165 | } | |
166 | ||
1077a574 DW |
167 | for_each_sas_task(num, task) { |
168 | dev_dbg(&ihost->pdev->dev, | |
6f231dda DW |
169 | "task = %p, num = %d; dev = %p; cmd = %p\n", |
170 | task, num, task->dev, task->uldd_task); | |
171 | ||
4393aa4e | 172 | device = task->dev->lldd_dev; |
6f231dda | 173 | |
f0846c68 JS |
174 | if (device) |
175 | device_status = device->status; | |
176 | else | |
177 | device_status = isci_freed; | |
178 | ||
179 | /* From this point onward, any process that needs to guarantee | |
180 | * that there is no kernel I/O being started will have to wait | |
181 | * for the quiesce spinlock. | |
182 | */ | |
183 | ||
184 | if (device_status != isci_ready_for_io) { | |
6f231dda DW |
185 | |
186 | /* Forces a retry from scsi mid layer. */ | |
1077a574 | 187 | dev_warn(&ihost->pdev->dev, |
6f231dda | 188 | "%s: task %p: isci_host->status = %d, " |
f0846c68 | 189 | "device = %p; device_status = 0x%x\n\n", |
6f231dda DW |
190 | __func__, |
191 | task, | |
1077a574 | 192 | isci_host_get_state(ihost), |
f0846c68 | 193 | device, device_status); |
6f231dda | 194 | |
f0846c68 JS |
195 | if (device_status == isci_ready) { |
196 | /* Indicate QUEUE_FULL so that the scsi midlayer | |
197 | * retries. | |
198 | */ | |
1077a574 DW |
199 | isci_task_refuse(ihost, task, |
200 | SAS_TASK_COMPLETE, | |
201 | SAS_QUEUE_FULL); | |
f0846c68 JS |
202 | } else { |
203 | /* Else, the device is going down. */ | |
1077a574 DW |
204 | isci_task_refuse(ihost, task, |
205 | SAS_TASK_UNDELIVERED, | |
206 | SAS_DEVICE_UNKNOWN); | |
f0846c68 | 207 | } |
1077a574 | 208 | isci_host_can_dequeue(ihost, 1); |
f0846c68 JS |
209 | } else { |
210 | /* There is a device and it's ready for I/O. */ | |
211 | spin_lock_irqsave(&task->task_state_lock, flags); | |
6f231dda | 212 | |
f0846c68 | 213 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
6f231dda | 214 | |
f0846c68 JS |
215 | spin_unlock_irqrestore(&task->task_state_lock, |
216 | flags); | |
6f231dda | 217 | |
1077a574 DW |
218 | isci_task_refuse(ihost, task, |
219 | SAS_TASK_UNDELIVERED, | |
220 | SAM_STAT_TASK_ABORTED); | |
6f231dda | 221 | |
f0846c68 | 222 | /* The I/O was aborted. */ |
6f231dda | 223 | |
f0846c68 | 224 | } else { |
6f231dda DW |
225 | task->task_state_flags |= SAS_TASK_AT_INITIATOR; |
226 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
f0846c68 JS |
227 | |
228 | /* build and send the request. */ | |
1077a574 | 229 | status = isci_request_execute(ihost, task, &request, |
f0846c68 JS |
230 | gfp_flags); |
231 | ||
232 | if (status != SCI_SUCCESS) { | |
233 | ||
234 | spin_lock_irqsave(&task->task_state_lock, flags); | |
235 | /* Did not really start this command. */ | |
236 | task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; | |
237 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
238 | ||
239 | /* Indicate QUEUE_FULL so that the scsi | |
240 | * midlayer retries. if the request | |
241 | * failed for remote device reasons, | |
242 | * it gets returned as | |
243 | * SAS_TASK_UNDELIVERED next time | |
244 | * through. | |
245 | */ | |
1077a574 DW |
246 | isci_task_refuse(ihost, task, |
247 | SAS_TASK_COMPLETE, | |
248 | SAS_QUEUE_FULL); | |
249 | isci_host_can_dequeue(ihost, 1); | |
f0846c68 | 250 | } |
6f231dda DW |
251 | } |
252 | } | |
1077a574 | 253 | } |
6f231dda DW |
254 | return 0; |
255 | } | |
256 | ||
257 | ||
258 | ||
259 | /** | |
260 | * isci_task_request_build() - This function builds the task request object. | |
261 | * @isci_host: This parameter specifies the ISCI host object | |
262 | * @request: This parameter points to the isci_request object allocated in the | |
263 | * request construct function. | |
264 | * @tmf: This parameter is the task management struct to be built | |
265 | * | |
266 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
267 | */ | |
268 | static enum sci_status isci_task_request_build( | |
269 | struct isci_host *isci_host, | |
270 | struct isci_request **isci_request, | |
271 | struct isci_tmf *isci_tmf) | |
272 | { | |
273 | struct scic_sds_remote_device *sci_device; | |
274 | enum sci_status status = SCI_FAILURE; | |
6cb4d6b3 | 275 | struct isci_request *request = NULL; |
6f231dda DW |
276 | struct isci_remote_device *isci_device; |
277 | /* struct sci_sas_identify_address_frame_protocols dev_protocols; */ | |
278 | struct smp_discover_response_protocols dev_protocols; | |
279 | ||
280 | ||
281 | dev_dbg(&isci_host->pdev->dev, | |
282 | "%s: isci_tmf = %p\n", __func__, isci_tmf); | |
283 | ||
284 | isci_device = isci_tmf->device; | |
3a97eec6 | 285 | sci_device = to_sci_dev(isci_device); |
6f231dda DW |
286 | |
287 | /* do common allocation and init of request object. */ | |
288 | status = isci_request_alloc_tmf( | |
289 | isci_host, | |
290 | isci_tmf, | |
291 | &request, | |
292 | isci_device, | |
293 | GFP_ATOMIC | |
294 | ); | |
295 | ||
296 | if (status != SCI_SUCCESS) | |
297 | goto out; | |
298 | ||
299 | /* let the core do it's construct. */ | |
300 | status = scic_task_request_construct( | |
301 | isci_host->core_controller, | |
302 | sci_device, | |
303 | SCI_CONTROLLER_INVALID_IO_TAG, | |
304 | request, | |
305 | request->sci_request_mem_ptr, | |
306 | &request->sci_request_handle | |
307 | ); | |
308 | ||
309 | if (status != SCI_SUCCESS) { | |
310 | dev_warn(&isci_host->pdev->dev, | |
311 | "%s: scic_task_request_construct failed - " | |
312 | "status = 0x%x\n", | |
313 | __func__, | |
314 | status); | |
315 | goto errout; | |
316 | } | |
317 | ||
318 | sci_object_set_association( | |
319 | request->sci_request_handle, | |
320 | request | |
321 | ); | |
322 | ||
323 | scic_remote_device_get_protocols( | |
324 | sci_device, | |
325 | &dev_protocols | |
326 | ); | |
327 | ||
328 | /* let the core do it's protocol | |
329 | * specific construction. | |
330 | */ | |
331 | if (dev_protocols.u.bits.attached_ssp_target) { | |
332 | ||
333 | isci_tmf->proto = SAS_PROTOCOL_SSP; | |
334 | status = scic_task_request_construct_ssp( | |
335 | request->sci_request_handle | |
336 | ); | |
337 | if (status != SCI_SUCCESS) | |
338 | goto errout; | |
339 | } | |
340 | ||
341 | if (dev_protocols.u.bits.attached_stp_target) { | |
342 | ||
343 | isci_tmf->proto = SAS_PROTOCOL_SATA; | |
344 | status = isci_sata_management_task_request_build(request); | |
345 | ||
346 | if (status != SCI_SUCCESS) | |
347 | goto errout; | |
348 | } | |
349 | ||
350 | goto out; | |
351 | ||
352 | errout: | |
353 | ||
354 | /* release the dma memory if we fail. */ | |
355 | isci_request_free(isci_host, request); | |
356 | request = NULL; | |
357 | ||
358 | out: | |
359 | *isci_request = request; | |
360 | return status; | |
361 | } | |
362 | ||
363 | /** | |
364 | * isci_tmf_timeout_cb() - This function is called as a kernel callback when | |
365 | * the timeout period for the TMF has expired. | |
366 | * | |
367 | * | |
368 | */ | |
369 | static void isci_tmf_timeout_cb(void *tmf_request_arg) | |
370 | { | |
371 | struct isci_request *request = (struct isci_request *)tmf_request_arg; | |
372 | struct isci_tmf *tmf = isci_request_access_tmf(request); | |
373 | enum sci_status status; | |
374 | ||
6f231dda DW |
375 | /* This task management request has timed-out. Terminate the request |
376 | * so that the request eventually completes to the requestor in the | |
377 | * request completion callback path. | |
378 | */ | |
379 | /* Note - the timer callback function itself has provided spinlock | |
380 | * exclusion from the start and completion paths. No need to take | |
381 | * the request->isci_host->scic_lock here. | |
382 | */ | |
383 | ||
384 | if (tmf->timeout_timer != NULL) { | |
385 | /* Call the users callback, if any. */ | |
386 | if (tmf->cb_state_func != NULL) | |
387 | tmf->cb_state_func(isci_tmf_timed_out, tmf, | |
388 | tmf->cb_data); | |
389 | ||
390 | /* Terminate the TMF transmit request. */ | |
391 | status = scic_controller_terminate_request( | |
392 | request->isci_host->core_controller, | |
3a97eec6 | 393 | to_sci_dev(request->isci_device), |
6f231dda DW |
394 | request->sci_request_handle |
395 | ); | |
396 | ||
397 | dev_dbg(&request->isci_host->pdev->dev, | |
398 | "%s: tmf_request = %p; tmf = %p; status = %d\n", | |
399 | __func__, request, tmf, status); | |
400 | } else | |
401 | dev_dbg(&request->isci_host->pdev->dev, | |
402 | "%s: timer already canceled! " | |
403 | "tmf_request = %p; tmf = %p\n", | |
404 | __func__, request, tmf); | |
405 | ||
406 | /* No need to unlock since the caller to this callback is doing it for | |
407 | * us. | |
408 | * request->isci_host->scic_lock | |
409 | */ | |
410 | } | |
411 | ||
412 | /** | |
413 | * isci_task_execute_tmf() - This function builds and sends a task request, | |
414 | * then waits for the completion. | |
415 | * @isci_host: This parameter specifies the ISCI host object | |
416 | * @tmf: This parameter is the pointer to the task management structure for | |
417 | * this request. | |
418 | * @timeout_ms: This parameter specifies the timeout period for the task | |
419 | * management request. | |
420 | * | |
421 | * TMF_RESP_FUNC_COMPLETE on successful completion of the TMF (this includes | |
422 | * error conditions reported in the IU status), or TMF_RESP_FUNC_FAILED. | |
423 | */ | |
424 | int isci_task_execute_tmf( | |
425 | struct isci_host *isci_host, | |
426 | struct isci_tmf *tmf, | |
427 | unsigned long timeout_ms) | |
428 | { | |
429 | DECLARE_COMPLETION_ONSTACK(completion); | |
467e855a | 430 | enum sci_task_status status = SCI_TASK_FAILURE; |
6f231dda DW |
431 | struct scic_sds_remote_device *sci_device; |
432 | struct isci_remote_device *isci_device = tmf->device; | |
433 | struct isci_request *request; | |
434 | int ret = TMF_RESP_FUNC_FAILED; | |
435 | unsigned long flags; | |
436 | ||
437 | /* sanity check, return TMF_RESP_FUNC_FAILED | |
438 | * if the device is not there and ready. | |
439 | */ | |
8acaec15 | 440 | if (!isci_device || isci_device->status != isci_ready_for_io) { |
6f231dda DW |
441 | dev_dbg(&isci_host->pdev->dev, |
442 | "%s: isci_device = %p not ready (%d)\n", | |
443 | __func__, | |
8acaec15 | 444 | isci_device, isci_device->status); |
6f231dda DW |
445 | return TMF_RESP_FUNC_FAILED; |
446 | } else | |
447 | dev_dbg(&isci_host->pdev->dev, | |
448 | "%s: isci_device = %p\n", | |
449 | __func__, isci_device); | |
450 | ||
3a97eec6 | 451 | sci_device = to_sci_dev(isci_device); |
6f231dda DW |
452 | |
453 | /* Assign the pointer to the TMF's completion kernel wait structure. */ | |
454 | tmf->complete = &completion; | |
455 | ||
456 | isci_task_request_build( | |
457 | isci_host, | |
458 | &request, | |
459 | tmf | |
460 | ); | |
461 | ||
462 | if (!request) { | |
463 | dev_warn(&isci_host->pdev->dev, | |
464 | "%s: isci_task_request_build failed\n", | |
465 | __func__); | |
466 | return TMF_RESP_FUNC_FAILED; | |
467 | } | |
468 | ||
469 | /* Allocate the TMF timeout timer. */ | |
6f231dda | 470 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
7c40a803 | 471 | tmf->timeout_timer = isci_timer_create(isci_host, request, isci_tmf_timeout_cb); |
6f231dda DW |
472 | |
473 | /* Start the timer. */ | |
474 | if (tmf->timeout_timer) | |
475 | isci_timer_start(tmf->timeout_timer, timeout_ms); | |
476 | else | |
477 | dev_warn(&isci_host->pdev->dev, | |
478 | "%s: isci_timer_create failed!!!!\n", | |
479 | __func__); | |
480 | ||
481 | /* start the TMF io. */ | |
482 | status = scic_controller_start_task( | |
483 | isci_host->core_controller, | |
484 | sci_device, | |
485 | request->sci_request_handle, | |
486 | SCI_CONTROLLER_INVALID_IO_TAG | |
487 | ); | |
488 | ||
467e855a | 489 | if (status != SCI_TASK_SUCCESS) { |
6f231dda DW |
490 | dev_warn(&isci_host->pdev->dev, |
491 | "%s: start_io failed - status = 0x%x, request = %p\n", | |
492 | __func__, | |
493 | status, | |
494 | request); | |
495 | goto cleanup_request; | |
496 | } | |
497 | ||
498 | /* Call the users callback, if any. */ | |
499 | if (tmf->cb_state_func != NULL) | |
500 | tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data); | |
501 | ||
502 | /* Change the state of the TMF-bearing request to "started". */ | |
503 | isci_request_change_state(request, started); | |
504 | ||
505 | /* add the request to the remote device request list. */ | |
506 | list_add(&request->dev_node, &isci_device->reqs_in_process); | |
507 | ||
508 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
509 | ||
510 | /* Wait for the TMF to complete, or a timeout. */ | |
511 | wait_for_completion(&completion); | |
512 | ||
513 | isci_print_tmf(tmf); | |
514 | ||
515 | if (tmf->status == SCI_SUCCESS) | |
516 | ret = TMF_RESP_FUNC_COMPLETE; | |
517 | else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) { | |
518 | dev_dbg(&isci_host->pdev->dev, | |
519 | "%s: tmf.status == " | |
520 | "SCI_FAILURE_IO_RESPONSE_VALID\n", | |
521 | __func__); | |
522 | ret = TMF_RESP_FUNC_COMPLETE; | |
523 | } | |
524 | /* Else - leave the default "failed" status alone. */ | |
525 | ||
526 | dev_dbg(&isci_host->pdev->dev, | |
527 | "%s: completed request = %p\n", | |
528 | __func__, | |
529 | request); | |
530 | ||
531 | if (request->io_request_completion != NULL) { | |
532 | ||
533 | /* The fact that this is non-NULL for a TMF request | |
534 | * means there is a thread waiting for this TMF to | |
535 | * finish. | |
536 | */ | |
537 | complete(request->io_request_completion); | |
538 | } | |
539 | ||
540 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
541 | ||
542 | cleanup_request: | |
543 | ||
544 | /* Clean up the timer if needed. */ | |
545 | if (tmf->timeout_timer) { | |
7c40a803 | 546 | isci_del_timer(isci_host, tmf->timeout_timer); |
6f231dda DW |
547 | tmf->timeout_timer = NULL; |
548 | } | |
549 | ||
550 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
551 | ||
552 | isci_request_free(isci_host, request); | |
553 | ||
554 | return ret; | |
555 | } | |
556 | ||
557 | void isci_task_build_tmf( | |
558 | struct isci_tmf *tmf, | |
559 | struct isci_remote_device *isci_device, | |
560 | enum isci_tmf_function_codes code, | |
561 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
562 | struct isci_tmf *, | |
563 | void *), | |
c3f42feb | 564 | void *cb_data) |
6f231dda DW |
565 | { |
566 | dev_dbg(&isci_device->isci_port->isci_host->pdev->dev, | |
567 | "%s: isci_device = %p\n", __func__, isci_device); | |
568 | ||
569 | memset(tmf, 0, sizeof(*tmf)); | |
570 | ||
571 | tmf->device = isci_device; | |
572 | tmf->tmf_code = code; | |
573 | tmf->timeout_timer = NULL; | |
574 | tmf->cb_state_func = tmf_sent_cb; | |
c3f42feb JS |
575 | tmf->cb_data = cb_data; |
576 | } | |
1fad9e93 | 577 | |
35173d57 | 578 | static void isci_task_build_abort_task_tmf( |
c3f42feb JS |
579 | struct isci_tmf *tmf, |
580 | struct isci_remote_device *isci_device, | |
581 | enum isci_tmf_function_codes code, | |
582 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
583 | struct isci_tmf *, | |
584 | void *), | |
585 | struct isci_request *old_request) | |
586 | { | |
587 | isci_task_build_tmf(tmf, isci_device, code, tmf_sent_cb, | |
588 | (void *)old_request); | |
589 | tmf->io_tag = old_request->io_tag; | |
6f231dda DW |
590 | } |
591 | ||
592 | static struct isci_request *isci_task_get_request_from_task( | |
593 | struct sas_task *task, | |
6f231dda DW |
594 | struct isci_remote_device **isci_device) |
595 | { | |
596 | ||
597 | struct isci_request *request = NULL; | |
598 | unsigned long flags; | |
599 | ||
600 | spin_lock_irqsave(&task->task_state_lock, flags); | |
601 | ||
602 | request = task->lldd_task; | |
603 | ||
604 | /* If task is already done, the request isn't valid */ | |
605 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE) && | |
606 | (task->task_state_flags & SAS_TASK_AT_INITIATOR) && | |
607 | (request != NULL)) { | |
608 | ||
6f231dda DW |
609 | if (isci_device != NULL) |
610 | *isci_device = request->isci_device; | |
611 | } | |
612 | ||
613 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
614 | ||
615 | return request; | |
616 | } | |
617 | ||
618 | /** | |
619 | * isci_task_validate_request_to_abort() - This function checks the given I/O | |
620 | * against the "started" state. If the request is still "started", it's | |
621 | * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD | |
622 | * BEFORE CALLING THIS FUNCTION. | |
623 | * @isci_request: This parameter specifies the request object to control. | |
624 | * @isci_host: This parameter specifies the ISCI host object | |
625 | * @isci_device: This is the device to which the request is pending. | |
626 | * @aborted_io_completion: This is a completion structure that will be added to | |
627 | * the request in case it is changed to aborting; this completion is | |
628 | * triggered when the request is fully completed. | |
629 | * | |
630 | * Either "started" on successful change of the task status to "aborted", or | |
631 | * "unallocated" if the task cannot be controlled. | |
632 | */ | |
633 | static enum isci_request_status isci_task_validate_request_to_abort( | |
634 | struct isci_request *isci_request, | |
635 | struct isci_host *isci_host, | |
636 | struct isci_remote_device *isci_device, | |
637 | struct completion *aborted_io_completion) | |
638 | { | |
639 | enum isci_request_status old_state = unallocated; | |
640 | ||
641 | /* Only abort the task if it's in the | |
642 | * device's request_in_process list | |
643 | */ | |
644 | if (isci_request && !list_empty(&isci_request->dev_node)) { | |
645 | old_state = isci_request_change_started_to_aborted( | |
646 | isci_request, aborted_io_completion); | |
647 | ||
6f231dda DW |
648 | } |
649 | ||
650 | return old_state; | |
651 | } | |
652 | ||
653 | static void isci_request_cleanup_completed_loiterer( | |
654 | struct isci_host *isci_host, | |
655 | struct isci_remote_device *isci_device, | |
656 | struct isci_request *isci_request) | |
657 | { | |
18d3d72a JS |
658 | struct sas_task *task; |
659 | unsigned long flags; | |
660 | ||
661 | task = (isci_request->ttype == io_task) | |
662 | ? isci_request_access_task(isci_request) | |
663 | : NULL; | |
6f231dda DW |
664 | |
665 | dev_dbg(&isci_host->pdev->dev, | |
666 | "%s: isci_device=%p, request=%p, task=%p\n", | |
18d3d72a | 667 | __func__, isci_device, isci_request, task); |
6f231dda DW |
668 | |
669 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
670 | list_del_init(&isci_request->dev_node); | |
6f231dda DW |
671 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
672 | ||
a5fde225 JS |
673 | if (task != NULL) { |
674 | ||
675 | spin_lock_irqsave(&task->task_state_lock, flags); | |
676 | task->lldd_task = NULL; | |
677 | ||
678 | isci_set_task_doneflags(task); | |
679 | ||
680 | /* If this task is not in the abort path, call task_done. */ | |
681 | if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { | |
682 | ||
683 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
684 | task->task_done(task); | |
685 | } else | |
686 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
687 | } | |
6f231dda DW |
688 | isci_request_free(isci_host, isci_request); |
689 | } | |
4dc043c4 JS |
690 | |
691 | /** | |
692 | * @isci_termination_timed_out(): this function will deal with a request for | |
693 | * which the wait for termination has timed-out. | |
694 | * | |
695 | * @isci_host This SCU. | |
696 | * @isci_request The I/O request being terminated. | |
697 | */ | |
698 | static void | |
699 | isci_termination_timed_out( | |
700 | struct isci_host * host, | |
701 | struct isci_request * request | |
702 | ) | |
703 | { | |
704 | unsigned long state_flags; | |
705 | ||
706 | dev_warn(&host->pdev->dev, | |
707 | "%s: host = %p; request = %p\n", | |
708 | __func__, host, request); | |
709 | ||
710 | /* At this point, the request to terminate | |
711 | * has timed out. The best we can do is to | |
712 | * have the request die a silent death | |
713 | * if it ever completes. | |
714 | */ | |
715 | spin_lock_irqsave(&request->state_lock, state_flags); | |
716 | ||
717 | if (request->status == started) { | |
718 | ||
719 | /* Set the request state to "dead", | |
720 | * and clear the task pointer so that an actual | |
721 | * completion event callback doesn't do | |
722 | * anything. | |
723 | */ | |
724 | request->status = dead; | |
725 | ||
726 | /* Clear the timeout completion event pointer.*/ | |
727 | request->io_request_completion = NULL; | |
728 | ||
729 | if (request->ttype == io_task) { | |
730 | ||
731 | /* Break links with the sas_task. */ | |
732 | if (request->ttype_ptr.io_task_ptr != NULL) { | |
733 | ||
734 | request->ttype_ptr.io_task_ptr->lldd_task = NULL; | |
735 | request->ttype_ptr.io_task_ptr = NULL; | |
736 | } | |
737 | } | |
738 | } | |
739 | spin_unlock_irqrestore(&request->state_lock, state_flags); | |
740 | } | |
741 | ||
742 | ||
6f231dda DW |
743 | /** |
744 | * isci_terminate_request_core() - This function will terminate the given | |
745 | * request, and wait for it to complete. This function must only be called | |
746 | * from a thread that can wait. Note that the request is terminated and | |
747 | * completed (back to the host, if started there). | |
748 | * @isci_host: This SCU. | |
749 | * @isci_device: The target. | |
750 | * @isci_request: The I/O request to be terminated. | |
751 | * | |
752 | * | |
753 | */ | |
754 | static void isci_terminate_request_core( | |
755 | struct isci_host *isci_host, | |
756 | struct isci_remote_device *isci_device, | |
cbb65c66 | 757 | struct isci_request *isci_request) |
6f231dda | 758 | { |
cbb65c66 | 759 | enum sci_status status = SCI_SUCCESS; |
6f231dda DW |
760 | bool was_terminated = false; |
761 | bool needs_cleanup_handling = false; | |
762 | enum isci_request_status request_status; | |
763 | unsigned long flags; | |
4dc043c4 JS |
764 | unsigned long timeout_remaining; |
765 | ||
6f231dda DW |
766 | |
767 | dev_dbg(&isci_host->pdev->dev, | |
768 | "%s: device = %p; request = %p\n", | |
769 | __func__, isci_device, isci_request); | |
770 | ||
6f231dda | 771 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
4dc043c4 JS |
772 | |
773 | /* Note that we are not going to control | |
774 | * the target to abort the request. | |
775 | */ | |
776 | isci_request->complete_in_target = true; | |
777 | ||
6f231dda DW |
778 | /* Make sure the request wasn't just sitting around signalling |
779 | * device condition (if the request handle is NULL, then the | |
780 | * request completed but needed additional handling here). | |
781 | */ | |
782 | if (isci_request->sci_request_handle != NULL) { | |
783 | was_terminated = true; | |
cbb65c66 | 784 | needs_cleanup_handling = true; |
6f231dda DW |
785 | status = scic_controller_terminate_request( |
786 | isci_host->core_controller, | |
3a97eec6 | 787 | to_sci_dev(isci_device), |
6f231dda DW |
788 | isci_request->sci_request_handle |
789 | ); | |
790 | } | |
791 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
792 | ||
793 | /* | |
794 | * The only time the request to terminate will | |
795 | * fail is when the io request is completed and | |
796 | * being aborted. | |
797 | */ | |
4dc043c4 | 798 | if (status != SCI_SUCCESS) { |
6f231dda DW |
799 | dev_err(&isci_host->pdev->dev, |
800 | "%s: scic_controller_terminate_request" | |
801 | " returned = 0x%x\n", | |
802 | __func__, | |
803 | status); | |
4dc043c4 JS |
804 | /* Clear the completion pointer from the request. */ |
805 | isci_request->io_request_completion = NULL; | |
806 | ||
807 | } else { | |
6f231dda DW |
808 | if (was_terminated) { |
809 | dev_dbg(&isci_host->pdev->dev, | |
810 | "%s: before completion wait (%p)\n", | |
811 | __func__, | |
cbb65c66 | 812 | isci_request->io_request_completion); |
6f231dda DW |
813 | |
814 | /* Wait here for the request to complete. */ | |
4dc043c4 JS |
815 | #define TERMINATION_TIMEOUT_MSEC 50 |
816 | timeout_remaining | |
817 | = wait_for_completion_timeout( | |
818 | isci_request->io_request_completion, | |
819 | msecs_to_jiffies(TERMINATION_TIMEOUT_MSEC)); | |
820 | ||
821 | if (!timeout_remaining) { | |
822 | ||
823 | isci_termination_timed_out(isci_host, | |
824 | isci_request); | |
825 | ||
826 | dev_err(&isci_host->pdev->dev, | |
827 | "%s: *** Timeout waiting for " | |
828 | "termination(%p/%p)\n", | |
829 | __func__, | |
830 | isci_request->io_request_completion, | |
831 | isci_request); | |
832 | ||
833 | } else | |
834 | dev_dbg(&isci_host->pdev->dev, | |
835 | "%s: after completion wait (%p)\n", | |
836 | __func__, | |
837 | isci_request->io_request_completion); | |
838 | } | |
839 | /* Clear the completion pointer from the request. */ | |
840 | isci_request->io_request_completion = NULL; | |
841 | ||
842 | /* Peek at the status of the request. This will tell | |
843 | * us if there was special handling on the request such that it | |
844 | * needs to be detached and freed here. | |
845 | */ | |
846 | spin_lock_irqsave(&isci_request->state_lock, flags); | |
847 | request_status = isci_request_get_state(isci_request); | |
848 | ||
849 | if ((isci_request->ttype == io_task) /* TMFs are in their own thread */ | |
850 | && ((request_status == aborted) | |
851 | || (request_status == aborting) | |
852 | || (request_status == terminating) | |
853 | || (request_status == completed) | |
854 | || (request_status == dead) | |
855 | ) | |
856 | ) { | |
857 | ||
858 | /* The completion routine won't free a request in | |
859 | * the aborted/aborting/etc. states, so we do | |
860 | * it here. | |
861 | */ | |
862 | needs_cleanup_handling = true; | |
6f231dda | 863 | } |
4dc043c4 | 864 | spin_unlock_irqrestore(&isci_request->state_lock, flags); |
6f231dda DW |
865 | |
866 | if (needs_cleanup_handling) | |
867 | isci_request_cleanup_completed_loiterer( | |
868 | isci_host, isci_device, isci_request | |
869 | ); | |
870 | } | |
871 | } | |
cbb65c66 | 872 | |
6f231dda DW |
873 | static void isci_terminate_request( |
874 | struct isci_host *isci_host, | |
875 | struct isci_remote_device *isci_device, | |
876 | struct isci_request *isci_request, | |
877 | enum isci_request_status new_request_state) | |
878 | { | |
879 | enum isci_request_status old_state; | |
6f231dda | 880 | DECLARE_COMPLETION_ONSTACK(request_completion); |
6f231dda DW |
881 | |
882 | /* Change state to "new_request_state" if it is currently "started" */ | |
883 | old_state = isci_request_change_started_to_newstate( | |
884 | isci_request, | |
885 | &request_completion, | |
886 | new_request_state | |
887 | ); | |
888 | ||
f219f010 JS |
889 | if ((old_state == started) || |
890 | (old_state == completed) || | |
891 | (old_state == aborting)) { | |
6f231dda | 892 | |
a5fde225 JS |
893 | /* If the old_state is started: |
894 | * This request was not already being aborted. If it had been, | |
6f231dda DW |
895 | * then the aborting I/O (ie. the TMF request) would not be in |
896 | * the aborting state, and thus would be terminated here. Note | |
897 | * that since the TMF completion's call to the kernel function | |
898 | * "complete()" does not happen until the pending I/O request | |
899 | * terminate fully completes, we do not have to implement a | |
900 | * special wait here for already aborting requests - the | |
901 | * termination of the TMF request will force the request | |
902 | * to finish it's already started terminate. | |
a5fde225 JS |
903 | * |
904 | * If old_state == completed: | |
905 | * This request completed from the SCU hardware perspective | |
906 | * and now just needs cleaning up in terms of freeing the | |
907 | * request and potentially calling up to libsas. | |
f219f010 JS |
908 | * |
909 | * If old_state == aborting: | |
910 | * This request has already gone through a TMF timeout, but may | |
911 | * not have been terminated; needs cleaning up at least. | |
6f231dda DW |
912 | */ |
913 | isci_terminate_request_core(isci_host, isci_device, | |
cbb65c66 | 914 | isci_request); |
a5fde225 | 915 | } |
6f231dda DW |
916 | } |
917 | ||
918 | /** | |
919 | * isci_terminate_pending_requests() - This function will change the all of the | |
920 | * requests on the given device's state to "aborting", will terminate the | |
921 | * requests, and wait for them to complete. This function must only be | |
922 | * called from a thread that can wait. Note that the requests are all | |
923 | * terminated and completed (back to the host, if started there). | |
924 | * @isci_host: This parameter specifies SCU. | |
925 | * @isci_device: This parameter specifies the target. | |
926 | * | |
927 | * | |
928 | */ | |
929 | void isci_terminate_pending_requests( | |
930 | struct isci_host *isci_host, | |
931 | struct isci_remote_device *isci_device, | |
932 | enum isci_request_status new_request_state) | |
933 | { | |
4dc043c4 JS |
934 | struct isci_request *request; |
935 | struct isci_request *next_request; | |
936 | unsigned long flags; | |
937 | struct list_head aborted_request_list; | |
938 | ||
939 | INIT_LIST_HEAD(&aborted_request_list); | |
6f231dda DW |
940 | |
941 | dev_dbg(&isci_host->pdev->dev, | |
942 | "%s: isci_device = %p (new request state = %d)\n", | |
943 | __func__, isci_device, new_request_state); | |
944 | ||
4dc043c4 | 945 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
6f231dda | 946 | |
4dc043c4 JS |
947 | /* Move all of the pending requests off of the device list. */ |
948 | list_splice_init(&isci_device->reqs_in_process, | |
949 | &aborted_request_list); | |
6f231dda | 950 | |
4dc043c4 | 951 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
6f231dda | 952 | |
4dc043c4 JS |
953 | /* Iterate through the now-local list. */ |
954 | list_for_each_entry_safe(request, next_request, | |
955 | &aborted_request_list, dev_node) { | |
6f231dda | 956 | |
4dc043c4 JS |
957 | dev_warn(&isci_host->pdev->dev, |
958 | "%s: isci_device=%p request=%p; task=%p\n", | |
959 | __func__, | |
960 | isci_device, request, | |
961 | ((request->ttype == io_task) | |
962 | ? isci_request_access_task(request) | |
963 | : NULL)); | |
964 | ||
965 | /* Mark all still pending I/O with the selected next | |
966 | * state, terminate and free it. | |
967 | */ | |
968 | isci_terminate_request(isci_host, isci_device, | |
969 | request, new_request_state | |
970 | ); | |
971 | } | |
6f231dda DW |
972 | } |
973 | ||
974 | /** | |
975 | * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain | |
976 | * Template functions. | |
977 | * @lun: This parameter specifies the lun to be reset. | |
978 | * | |
979 | * status, zero indicates success. | |
980 | */ | |
981 | static int isci_task_send_lu_reset_sas( | |
982 | struct isci_host *isci_host, | |
983 | struct isci_remote_device *isci_device, | |
984 | u8 *lun) | |
985 | { | |
986 | struct isci_tmf tmf; | |
987 | int ret = TMF_RESP_FUNC_FAILED; | |
988 | ||
989 | dev_dbg(&isci_host->pdev->dev, | |
990 | "%s: isci_host = %p, isci_device = %p\n", | |
991 | __func__, isci_host, isci_device); | |
992 | /* Send the LUN reset to the target. By the time the call returns, | |
993 | * the TMF has fully exected in the target (in which case the return | |
994 | * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or | |
995 | * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED"). | |
996 | */ | |
997 | isci_task_build_tmf(&tmf, isci_device, isci_tmf_ssp_lun_reset, NULL, | |
998 | NULL); | |
999 | ||
1000 | #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */ | |
1001 | ret = isci_task_execute_tmf(isci_host, &tmf, ISCI_LU_RESET_TIMEOUT_MS); | |
1002 | ||
1003 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
1004 | dev_dbg(&isci_host->pdev->dev, | |
1005 | "%s: %p: TMF_LU_RESET passed\n", | |
1006 | __func__, isci_device); | |
1007 | else | |
1008 | dev_dbg(&isci_host->pdev->dev, | |
1009 | "%s: %p: TMF_LU_RESET failed (%x)\n", | |
1010 | __func__, isci_device, ret); | |
1011 | ||
1012 | return ret; | |
1013 | } | |
1014 | ||
1015 | /** | |
1016 | * isci_task_lu_reset() - This function is one of the SAS Domain Template | |
1017 | * functions. This is one of the Task Management functoins called by libsas, | |
1018 | * to reset the given lun. Note the assumption that while this call is | |
1019 | * executing, no I/O will be sent by the host to the device. | |
1020 | * @lun: This parameter specifies the lun to be reset. | |
1021 | * | |
1022 | * status, zero indicates success. | |
1023 | */ | |
4393aa4e | 1024 | int isci_task_lu_reset(struct domain_device *domain_device, u8 *lun) |
6f231dda | 1025 | { |
4393aa4e | 1026 | struct isci_host *isci_host = dev_to_ihost(domain_device); |
6f231dda DW |
1027 | struct isci_remote_device *isci_device = NULL; |
1028 | int ret; | |
1029 | bool device_stopping = false; | |
1030 | ||
4393aa4e | 1031 | isci_device = domain_device->lldd_dev; |
6f231dda | 1032 | |
4393aa4e DW |
1033 | dev_dbg(&isci_host->pdev->dev, |
1034 | "%s: domain_device=%p, isci_host=%p; isci_device=%p\n", | |
6f231dda DW |
1035 | __func__, domain_device, isci_host, isci_device); |
1036 | ||
1037 | if (isci_device != NULL) | |
1038 | device_stopping = (isci_device->status == isci_stopping) | |
1039 | || (isci_device->status == isci_stopped); | |
1040 | ||
1041 | /* If there is a device reset pending on any request in the | |
1042 | * device's list, fail this LUN reset request in order to | |
1043 | * escalate to the device reset. | |
1044 | */ | |
4393aa4e DW |
1045 | if (!isci_device || device_stopping || |
1046 | isci_device_is_reset_pending(isci_host, isci_device)) { | |
6f231dda | 1047 | dev_warn(&isci_host->pdev->dev, |
4393aa4e | 1048 | "%s: No dev (%p), or " |
6f231dda | 1049 | "RESET PENDING: domain_device=%p\n", |
4393aa4e | 1050 | __func__, isci_device, domain_device); |
6f231dda DW |
1051 | return TMF_RESP_FUNC_FAILED; |
1052 | } | |
1053 | ||
6f231dda DW |
1054 | /* Send the task management part of the reset. */ |
1055 | if (sas_protocol_ata(domain_device->tproto)) { | |
4393aa4e | 1056 | ret = isci_task_send_lu_reset_sata(isci_host, isci_device, lun); |
6f231dda DW |
1057 | } else |
1058 | ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun); | |
1059 | ||
1060 | /* If the LUN reset worked, all the I/O can now be terminated. */ | |
1061 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
1062 | /* Terminate all I/O now. */ | |
1063 | isci_terminate_pending_requests(isci_host, | |
1064 | isci_device, | |
1065 | terminating); | |
1066 | ||
6f231dda DW |
1067 | return ret; |
1068 | } | |
1069 | ||
1070 | ||
1071 | /* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */ | |
1072 | int isci_task_clear_nexus_port(struct asd_sas_port *port) | |
1073 | { | |
1074 | return TMF_RESP_FUNC_FAILED; | |
1075 | } | |
1076 | ||
1077 | ||
1078 | ||
1079 | int isci_task_clear_nexus_ha(struct sas_ha_struct *ha) | |
1080 | { | |
1081 | return TMF_RESP_FUNC_FAILED; | |
1082 | } | |
1083 | ||
1084 | int isci_task_I_T_nexus_reset(struct domain_device *dev) | |
1085 | { | |
1086 | return TMF_RESP_FUNC_FAILED; | |
1087 | } | |
1088 | ||
1089 | ||
1090 | /* Task Management Functions. Must be called from process context. */ | |
1091 | ||
1092 | /** | |
1093 | * isci_abort_task_process_cb() - This is a helper function for the abort task | |
1094 | * TMF command. It manages the request state with respect to the successful | |
1095 | * transmission / completion of the abort task request. | |
1096 | * @cb_state: This parameter specifies when this function was called - after | |
1097 | * the TMF request has been started and after it has timed-out. | |
1098 | * @tmf: This parameter specifies the TMF in progress. | |
1099 | * | |
1100 | * | |
1101 | */ | |
1102 | static void isci_abort_task_process_cb( | |
1103 | enum isci_tmf_cb_state cb_state, | |
1104 | struct isci_tmf *tmf, | |
1105 | void *cb_data) | |
1106 | { | |
1107 | struct isci_request *old_request; | |
1108 | ||
1109 | old_request = (struct isci_request *)cb_data; | |
1110 | ||
1111 | dev_dbg(&old_request->isci_host->pdev->dev, | |
1112 | "%s: tmf=%p, old_request=%p\n", | |
1113 | __func__, tmf, old_request); | |
1114 | ||
1115 | switch (cb_state) { | |
1116 | ||
1117 | case isci_tmf_started: | |
1118 | /* The TMF has been started. Nothing to do here, since the | |
1119 | * request state was already set to "aborted" by the abort | |
1120 | * task function. | |
1121 | */ | |
6cb4d6b3 BB |
1122 | if ((old_request->status != aborted) |
1123 | && (old_request->status != completed)) | |
1124 | dev_err(&old_request->isci_host->pdev->dev, | |
1125 | "%s: Bad request status (%d): tmf=%p, old_request=%p\n", | |
1126 | __func__, old_request->status, tmf, old_request); | |
6f231dda DW |
1127 | break; |
1128 | ||
1129 | case isci_tmf_timed_out: | |
1130 | ||
1131 | /* Set the task's state to "aborting", since the abort task | |
1132 | * function thread set it to "aborted" (above) in anticipation | |
1133 | * of the task management request working correctly. Since the | |
1134 | * timeout has now fired, the TMF request failed. We set the | |
1135 | * state such that the request completion will indicate the | |
1136 | * device is no longer present. | |
1137 | */ | |
1138 | isci_request_change_state(old_request, aborting); | |
1139 | break; | |
1140 | ||
1141 | default: | |
1142 | dev_err(&old_request->isci_host->pdev->dev, | |
1143 | "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n", | |
1144 | __func__, cb_state, tmf, old_request); | |
1145 | break; | |
1146 | } | |
1147 | } | |
1148 | ||
1149 | /** | |
1150 | * isci_task_abort_task() - This function is one of the SAS Domain Template | |
1151 | * functions. This function is called by libsas to abort a specified task. | |
1152 | * @task: This parameter specifies the SAS task to abort. | |
1153 | * | |
1154 | * status, zero indicates success. | |
1155 | */ | |
1156 | int isci_task_abort_task(struct sas_task *task) | |
1157 | { | |
4393aa4e | 1158 | struct isci_host *isci_host = dev_to_ihost(task->dev); |
6f231dda | 1159 | DECLARE_COMPLETION_ONSTACK(aborted_io_completion); |
a5fde225 JS |
1160 | struct isci_request *old_request = NULL; |
1161 | enum isci_request_status old_state; | |
6f231dda | 1162 | struct isci_remote_device *isci_device = NULL; |
a5fde225 JS |
1163 | struct isci_tmf tmf; |
1164 | int ret = TMF_RESP_FUNC_FAILED; | |
1165 | unsigned long flags; | |
1166 | bool any_dev_reset = false; | |
1167 | bool device_stopping; | |
6f231dda DW |
1168 | |
1169 | /* Get the isci_request reference from the task. Note that | |
1170 | * this check does not depend on the pending request list | |
1171 | * in the device, because tasks driving resets may land here | |
1172 | * after completion in the core. | |
1173 | */ | |
4393aa4e | 1174 | old_request = isci_task_get_request_from_task(task, &isci_device); |
6f231dda DW |
1175 | |
1176 | dev_dbg(&isci_host->pdev->dev, | |
1177 | "%s: task = %p\n", __func__, task); | |
1178 | ||
1179 | /* Check if the device has been / is currently being removed. | |
1180 | * If so, no task management will be done, and the I/O will | |
1181 | * be terminated. | |
1182 | */ | |
1183 | device_stopping = (isci_device->status == isci_stopping) | |
1184 | || (isci_device->status == isci_stopped); | |
1185 | ||
6f231dda DW |
1186 | /* This version of the driver will fail abort requests for |
1187 | * SATA/STP. Failing the abort request this way will cause the | |
1188 | * SCSI error handler thread to escalate to LUN reset | |
1189 | */ | |
1190 | if (sas_protocol_ata(task->task_proto) && !device_stopping) { | |
1191 | dev_warn(&isci_host->pdev->dev, | |
1192 | " task %p is for a STP/SATA device;" | |
1193 | " returning TMF_RESP_FUNC_FAILED\n" | |
1194 | " to cause a LUN reset...\n", task); | |
1195 | return TMF_RESP_FUNC_FAILED; | |
1196 | } | |
1197 | ||
1198 | dev_dbg(&isci_host->pdev->dev, | |
1199 | "%s: old_request == %p\n", __func__, old_request); | |
1200 | ||
a5fde225 JS |
1201 | if (!device_stopping) |
1202 | any_dev_reset = isci_device_is_reset_pending(isci_host,isci_device); | |
1203 | ||
6f231dda DW |
1204 | spin_lock_irqsave(&task->task_state_lock, flags); |
1205 | ||
1206 | /* Don't do resets to stopping devices. */ | |
a5fde225 | 1207 | if (device_stopping) { |
6f231dda | 1208 | |
a5fde225 JS |
1209 | task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET; |
1210 | any_dev_reset = false; | |
6f231dda | 1211 | |
a5fde225 | 1212 | } else /* See if there is a pending device reset for this device. */ |
6f231dda | 1213 | any_dev_reset = any_dev_reset |
a5fde225 | 1214 | || (task->task_state_flags & SAS_TASK_NEED_DEV_RESET); |
6f231dda DW |
1215 | |
1216 | /* If the extraction of the request reference from the task | |
1217 | * failed, then the request has been completed (or if there is a | |
1218 | * pending reset then this abort request function must be failed | |
1219 | * in order to escalate to the target reset). | |
1220 | */ | |
a5fde225 | 1221 | if ((old_request == NULL) || any_dev_reset) { |
6f231dda DW |
1222 | |
1223 | /* If the device reset task flag is set, fail the task | |
1224 | * management request. Otherwise, the original request | |
1225 | * has completed. | |
1226 | */ | |
1227 | if (any_dev_reset) { | |
1228 | ||
1229 | /* Turn off the task's DONE to make sure this | |
1230 | * task is escalated to a target reset. | |
1231 | */ | |
1232 | task->task_state_flags &= ~SAS_TASK_STATE_DONE; | |
1233 | ||
a5fde225 JS |
1234 | /* Make the reset happen as soon as possible. */ |
1235 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
1236 | ||
1237 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1238 | ||
6f231dda DW |
1239 | /* Fail the task management request in order to |
1240 | * escalate to the target reset. | |
1241 | */ | |
1242 | ret = TMF_RESP_FUNC_FAILED; | |
1243 | ||
1244 | dev_dbg(&isci_host->pdev->dev, | |
1245 | "%s: Failing task abort in order to " | |
1246 | "escalate to target reset because\n" | |
1247 | "SAS_TASK_NEED_DEV_RESET is set for " | |
1248 | "task %p on dev %p\n", | |
1249 | __func__, task, isci_device); | |
1250 | ||
6f231dda | 1251 | |
a5fde225 | 1252 | } else { |
6f231dda DW |
1253 | /* The request has already completed and there |
1254 | * is nothing to do here other than to set the task | |
1255 | * done bit, and indicate that the task abort function | |
1256 | * was sucessful. | |
1257 | */ | |
1258 | isci_set_task_doneflags(task); | |
1259 | ||
a5fde225 | 1260 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
6f231dda | 1261 | |
a5fde225 | 1262 | ret = TMF_RESP_FUNC_COMPLETE; |
6f231dda | 1263 | |
a5fde225 JS |
1264 | dev_dbg(&isci_host->pdev->dev, |
1265 | "%s: abort task not needed for %p\n", | |
1266 | __func__, task); | |
6f231dda | 1267 | } |
6f231dda DW |
1268 | |
1269 | return ret; | |
1270 | } | |
a5fde225 JS |
1271 | else |
1272 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
6f231dda DW |
1273 | |
1274 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
1275 | ||
f219f010 | 1276 | /* Check the request status and change to "aborted" if currently |
a5fde225 | 1277 | * "starting"; if true then set the I/O kernel completion |
6f231dda DW |
1278 | * struct that will be triggered when the request completes. |
1279 | */ | |
a5fde225 JS |
1280 | old_state = isci_task_validate_request_to_abort( |
1281 | old_request, isci_host, isci_device, | |
1282 | &aborted_io_completion); | |
f219f010 JS |
1283 | if ((old_state != started) && |
1284 | (old_state != completed) && | |
1285 | (old_state != aborting)) { | |
6f231dda DW |
1286 | |
1287 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1288 | ||
a5fde225 JS |
1289 | /* The request was already being handled by someone else (because |
1290 | * they got to set the state away from started). | |
1291 | */ | |
1292 | dev_dbg(&isci_host->pdev->dev, | |
1293 | "%s: device = %p; old_request %p already being aborted\n", | |
1294 | __func__, | |
1295 | isci_device, old_request); | |
6f231dda DW |
1296 | |
1297 | return TMF_RESP_FUNC_COMPLETE; | |
1298 | } | |
a5fde225 JS |
1299 | if ((task->task_proto == SAS_PROTOCOL_SMP) |
1300 | || device_stopping | |
1301 | || old_request->complete_in_target | |
1302 | ) { | |
6f231dda DW |
1303 | |
1304 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1305 | ||
a5fde225 JS |
1306 | dev_dbg(&isci_host->pdev->dev, |
1307 | "%s: SMP request (%d)" | |
1308 | " or device is stopping (%d)" | |
1309 | " or complete_in_target (%d), thus no TMF\n", | |
1310 | __func__, (task->task_proto == SAS_PROTOCOL_SMP), | |
1311 | device_stopping, old_request->complete_in_target); | |
1312 | ||
6f231dda DW |
1313 | /* Set the state on the task. */ |
1314 | isci_task_all_done(task); | |
1315 | ||
1316 | ret = TMF_RESP_FUNC_COMPLETE; | |
1317 | ||
1318 | /* Stopping and SMP devices are not sent a TMF, and are not | |
a5fde225 | 1319 | * reset, but the outstanding I/O request is terminated below. |
6f231dda | 1320 | */ |
6f231dda DW |
1321 | } else { |
1322 | /* Fill in the tmf stucture */ | |
c3f42feb JS |
1323 | isci_task_build_abort_task_tmf(&tmf, isci_device, |
1324 | isci_tmf_ssp_task_abort, | |
1325 | isci_abort_task_process_cb, | |
1326 | old_request); | |
6f231dda | 1327 | |
6f231dda DW |
1328 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
1329 | ||
1330 | #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */ | |
1331 | ret = isci_task_execute_tmf(isci_host, &tmf, | |
1332 | ISCI_ABORT_TASK_TIMEOUT_MS); | |
1333 | ||
a5fde225 | 1334 | if (ret != TMF_RESP_FUNC_COMPLETE) |
6f231dda DW |
1335 | dev_err(&isci_host->pdev->dev, |
1336 | "%s: isci_task_send_tmf failed\n", | |
1337 | __func__); | |
1338 | } | |
a5fde225 JS |
1339 | if (ret == TMF_RESP_FUNC_COMPLETE) { |
1340 | old_request->complete_in_target = true; | |
1341 | ||
1342 | /* Clean up the request on our side, and wait for the aborted I/O to | |
1343 | * complete. | |
1344 | */ | |
cbb65c66 | 1345 | isci_terminate_request_core(isci_host, isci_device, old_request); |
a5fde225 | 1346 | } |
6f231dda | 1347 | |
a5fde225 JS |
1348 | /* Make sure we do not leave a reference to aborted_io_completion */ |
1349 | old_request->io_request_completion = NULL; | |
6f231dda DW |
1350 | return ret; |
1351 | } | |
1352 | ||
1353 | /** | |
1354 | * isci_task_abort_task_set() - This function is one of the SAS Domain Template | |
1355 | * functions. This is one of the Task Management functoins called by libsas, | |
1356 | * to abort all task for the given lun. | |
1357 | * @d_device: This parameter specifies the domain device associated with this | |
1358 | * request. | |
1359 | * @lun: This parameter specifies the lun associated with this request. | |
1360 | * | |
1361 | * status, zero indicates success. | |
1362 | */ | |
1363 | int isci_task_abort_task_set( | |
1364 | struct domain_device *d_device, | |
1365 | u8 *lun) | |
1366 | { | |
1367 | return TMF_RESP_FUNC_FAILED; | |
1368 | } | |
1369 | ||
1370 | ||
1371 | /** | |
1372 | * isci_task_clear_aca() - This function is one of the SAS Domain Template | |
1373 | * functions. This is one of the Task Management functoins called by libsas. | |
1374 | * @d_device: This parameter specifies the domain device associated with this | |
1375 | * request. | |
1376 | * @lun: This parameter specifies the lun associated with this request. | |
1377 | * | |
1378 | * status, zero indicates success. | |
1379 | */ | |
1380 | int isci_task_clear_aca( | |
1381 | struct domain_device *d_device, | |
1382 | u8 *lun) | |
1383 | { | |
1384 | return TMF_RESP_FUNC_FAILED; | |
1385 | } | |
1386 | ||
1387 | ||
1388 | ||
1389 | /** | |
1390 | * isci_task_clear_task_set() - This function is one of the SAS Domain Template | |
1391 | * functions. This is one of the Task Management functoins called by libsas. | |
1392 | * @d_device: This parameter specifies the domain device associated with this | |
1393 | * request. | |
1394 | * @lun: This parameter specifies the lun associated with this request. | |
1395 | * | |
1396 | * status, zero indicates success. | |
1397 | */ | |
1398 | int isci_task_clear_task_set( | |
1399 | struct domain_device *d_device, | |
1400 | u8 *lun) | |
1401 | { | |
1402 | return TMF_RESP_FUNC_FAILED; | |
1403 | } | |
1404 | ||
1405 | ||
1406 | /** | |
1407 | * isci_task_query_task() - This function is implemented to cause libsas to | |
1408 | * correctly escalate the failed abort to a LUN or target reset (this is | |
1409 | * because sas_scsi_find_task libsas function does not correctly interpret | |
1410 | * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is | |
1411 | * returned, libsas turns this into a LUN reset; when FUNC_FAILED is | |
1412 | * returned, libsas will turn this into a target reset | |
1413 | * @task: This parameter specifies the sas task being queried. | |
1414 | * @lun: This parameter specifies the lun associated with this request. | |
1415 | * | |
1416 | * status, zero indicates success. | |
1417 | */ | |
1418 | int isci_task_query_task( | |
1419 | struct sas_task *task) | |
1420 | { | |
1421 | /* See if there is a pending device reset for this device. */ | |
1422 | if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) | |
1423 | return TMF_RESP_FUNC_FAILED; | |
1424 | else | |
1425 | return TMF_RESP_FUNC_SUCC; | |
1426 | } | |
1427 | ||
1428 | /** | |
1429 | * isci_task_request_complete() - This function is called by the sci core when | |
1430 | * an task request completes. | |
1431 | * @isci_host: This parameter specifies the ISCI host object | |
1432 | * @request: This parameter is the completed isci_request object. | |
1433 | * @completion_status: This parameter specifies the completion status from the | |
1434 | * sci core. | |
1435 | * | |
1436 | * none. | |
1437 | */ | |
1438 | void isci_task_request_complete( | |
1439 | struct isci_host *isci_host, | |
1440 | struct isci_request *request, | |
1441 | enum sci_task_status completion_status) | |
1442 | { | |
1443 | struct isci_remote_device *isci_device = request->isci_device; | |
1444 | enum isci_request_status old_state; | |
1445 | struct isci_tmf *tmf = isci_request_access_tmf(request); | |
1446 | struct completion *tmf_complete; | |
1447 | ||
1448 | dev_dbg(&isci_host->pdev->dev, | |
1449 | "%s: request = %p, status=%d\n", | |
1450 | __func__, request, completion_status); | |
1451 | ||
1452 | old_state = isci_request_change_state(request, completed); | |
1453 | ||
1454 | tmf->status = completion_status; | |
1455 | request->complete_in_target = true; | |
1456 | ||
1457 | if (SAS_PROTOCOL_SSP == tmf->proto) { | |
1458 | ||
1459 | memcpy(&tmf->resp.resp_iu, | |
1460 | scic_io_request_get_response_iu_address( | |
1461 | request->sci_request_handle | |
1462 | ), | |
1463 | sizeof(struct sci_ssp_response_iu)); | |
1464 | ||
1465 | } else if (SAS_PROTOCOL_SATA == tmf->proto) { | |
1466 | ||
1467 | memcpy(&tmf->resp.d2h_fis, | |
1468 | scic_stp_io_request_get_d2h_reg_address( | |
1469 | request->sci_request_handle | |
1470 | ), | |
1471 | sizeof(struct sata_fis_reg_d2h) | |
1472 | ); | |
1473 | } | |
1474 | ||
1475 | /* Manage the timer if it is still running. */ | |
1476 | if (tmf->timeout_timer) { | |
7c40a803 | 1477 | isci_del_timer(isci_host, tmf->timeout_timer); |
6f231dda DW |
1478 | tmf->timeout_timer = NULL; |
1479 | } | |
1480 | ||
1481 | /* PRINT_TMF( ((struct isci_tmf *)request->task)); */ | |
1482 | tmf_complete = tmf->complete; | |
1483 | ||
c629582d | 1484 | scic_controller_complete_io( |
6f231dda | 1485 | isci_host->core_controller, |
3a97eec6 | 1486 | to_sci_dev(isci_device), |
6f231dda DW |
1487 | request->sci_request_handle |
1488 | ); | |
1489 | /* NULL the request handle to make sure it cannot be terminated | |
1490 | * or completed again. | |
1491 | */ | |
1492 | request->sci_request_handle = NULL; | |
1493 | ||
1494 | isci_request_change_state(request, unallocated); | |
1495 | list_del_init(&request->dev_node); | |
1496 | ||
1497 | /* The task management part completes last. */ | |
1498 | complete(tmf_complete); | |
1499 | } | |
1500 | ||
1501 | ||
1502 | /** | |
1503 | * isci_task_ssp_request_get_lun() - This function is called by the sci core to | |
1504 | * retrieve the lun for a given task request. | |
1505 | * @request: This parameter is the isci_request object. | |
1506 | * | |
1507 | * lun for specified task request. | |
1508 | */ | |
6f231dda DW |
1509 | |
1510 | /** | |
1511 | * isci_task_ssp_request_get_function() - This function is called by the sci | |
1512 | * core to retrieve the function for a given task request. | |
1513 | * @request: This parameter is the isci_request object. | |
1514 | * | |
1515 | * function code for specified task request. | |
1516 | */ | |
1517 | u8 isci_task_ssp_request_get_function(struct isci_request *request) | |
1518 | { | |
1519 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1520 | ||
1521 | dev_dbg(&request->isci_host->pdev->dev, | |
1522 | "%s: func = %d\n", __func__, isci_tmf->tmf_code); | |
1523 | ||
1524 | return isci_tmf->tmf_code; | |
1525 | } | |
1526 | ||
1527 | /** | |
1528 | * isci_task_ssp_request_get_io_tag_to_manage() - This function is called by | |
1529 | * the sci core to retrieve the io tag for a given task request. | |
1530 | * @request: This parameter is the isci_request object. | |
1531 | * | |
1532 | * io tag for specified task request. | |
1533 | */ | |
1534 | u16 isci_task_ssp_request_get_io_tag_to_manage(struct isci_request *request) | |
1535 | { | |
1536 | u16 io_tag = SCI_CONTROLLER_INVALID_IO_TAG; | |
1537 | ||
1538 | if (tmf_task == request->ttype) { | |
1539 | struct isci_tmf *tmf = isci_request_access_tmf(request); | |
1540 | io_tag = tmf->io_tag; | |
1541 | } | |
1542 | ||
1543 | dev_dbg(&request->isci_host->pdev->dev, | |
1544 | "%s: request = %p, io_tag = %d\n", | |
1545 | __func__, request, io_tag); | |
1546 | ||
1547 | return io_tag; | |
1548 | } | |
1549 | ||
1550 | /** | |
1551 | * isci_task_ssp_request_get_response_data_address() - This function is called | |
1552 | * by the sci core to retrieve the response data address for a given task | |
1553 | * request. | |
1554 | * @request: This parameter is the isci_request object. | |
1555 | * | |
1556 | * response data address for specified task request. | |
1557 | */ | |
1558 | void *isci_task_ssp_request_get_response_data_address( | |
1559 | struct isci_request *request) | |
1560 | { | |
1561 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1562 | ||
1563 | return &isci_tmf->resp.resp_iu; | |
1564 | } | |
1565 | ||
1566 | /** | |
1567 | * isci_task_ssp_request_get_response_data_length() - This function is called | |
1568 | * by the sci core to retrieve the response data length for a given task | |
1569 | * request. | |
1570 | * @request: This parameter is the isci_request object. | |
1571 | * | |
1572 | * response data length for specified task request. | |
1573 | */ | |
1574 | u32 isci_task_ssp_request_get_response_data_length( | |
1575 | struct isci_request *request) | |
1576 | { | |
1577 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1578 | ||
1579 | return sizeof(isci_tmf->resp.resp_iu); | |
1580 | } | |
1581 | ||
1582 | /** | |
1583 | * isci_bus_reset_handler() - This function performs a target reset of the | |
1584 | * device referenced by "cmd'. This function is exported through the | |
1585 | * "struct scsi_host_template" structure such that it is called when an I/O | |
1586 | * recovery process has escalated to a target reset. Note that this function | |
1587 | * is called from the scsi error handler event thread, so may block on calls. | |
1588 | * @scsi_cmd: This parameter specifies the target to be reset. | |
1589 | * | |
1590 | * SUCCESS if the reset process was successful, else FAILED. | |
1591 | */ | |
1592 | int isci_bus_reset_handler(struct scsi_cmnd *cmd) | |
1593 | { | |
4393aa4e DW |
1594 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
1595 | struct isci_host *isci_host = dev_to_ihost(dev); | |
6f231dda | 1596 | unsigned long flags = 0; |
6f231dda DW |
1597 | enum sci_status status; |
1598 | int base_status; | |
4393aa4e | 1599 | struct isci_remote_device *isci_dev = dev->lldd_dev; |
6f231dda | 1600 | |
4393aa4e | 1601 | dev_dbg(&isci_host->pdev->dev, |
6f231dda DW |
1602 | "%s: cmd %p, isci_dev %p\n", |
1603 | __func__, cmd, isci_dev); | |
1604 | ||
1605 | if (!isci_dev) { | |
4393aa4e | 1606 | dev_warn(&isci_host->pdev->dev, |
6f231dda DW |
1607 | "%s: isci_dev is GONE!\n", |
1608 | __func__); | |
1609 | ||
1610 | return TMF_RESP_FUNC_COMPLETE; /* Nothing to reset. */ | |
1611 | } | |
1612 | ||
4393aa4e | 1613 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
3a97eec6 | 1614 | status = scic_remote_device_reset(to_sci_dev(isci_dev)); |
6f231dda | 1615 | if (status != SCI_SUCCESS) { |
4393aa4e | 1616 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
6f231dda DW |
1617 | |
1618 | scmd_printk(KERN_WARNING, cmd, | |
1619 | "%s: scic_remote_device_reset(%p) returned %d!\n", | |
1620 | __func__, isci_dev, status); | |
1621 | ||
1622 | return TMF_RESP_FUNC_FAILED; | |
1623 | } | |
4393aa4e | 1624 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
6f231dda | 1625 | |
6f231dda | 1626 | /* Make sure all pending requests are able to be fully terminated. */ |
4393aa4e | 1627 | isci_device_clear_reset_pending(isci_host, isci_dev); |
6f231dda DW |
1628 | |
1629 | /* Terminate in-progress I/O now. */ | |
4393aa4e | 1630 | isci_remote_device_nuke_requests(isci_host, isci_dev); |
6f231dda DW |
1631 | |
1632 | /* Call into the libsas default handler (which calls sas_phy_reset). */ | |
1633 | base_status = sas_eh_bus_reset_handler(cmd); | |
1634 | ||
1635 | if (base_status != SUCCESS) { | |
1636 | ||
1637 | /* There can be cases where the resets to individual devices | |
1638 | * behind an expander will fail because of an unplug of the | |
1639 | * expander itself. | |
1640 | */ | |
1641 | scmd_printk(KERN_WARNING, cmd, | |
1642 | "%s: sas_eh_bus_reset_handler(%p) returned %d!\n", | |
1643 | __func__, cmd, base_status); | |
1644 | } | |
1645 | ||
1646 | /* WHAT TO DO HERE IF sas_phy_reset FAILS? */ | |
4393aa4e | 1647 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
3a97eec6 | 1648 | status = scic_remote_device_reset_complete(to_sci_dev(isci_dev)); |
4393aa4e | 1649 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
6f231dda DW |
1650 | |
1651 | if (status != SCI_SUCCESS) { | |
1652 | scmd_printk(KERN_WARNING, cmd, | |
1653 | "%s: scic_remote_device_reset_complete(%p) " | |
1654 | "returned %d!\n", | |
1655 | __func__, isci_dev, status); | |
1656 | } | |
1657 | /* WHAT TO DO HERE IF scic_remote_device_reset_complete FAILS? */ | |
1658 | ||
4393aa4e | 1659 | dev_dbg(&isci_host->pdev->dev, |
6f231dda DW |
1660 | "%s: cmd %p, isci_dev %p complete.\n", |
1661 | __func__, cmd, isci_dev); | |
1662 | ||
6f231dda DW |
1663 | return TMF_RESP_FUNC_COMPLETE; |
1664 | } |