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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> | |
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; | |
275 | struct isci_request *request; | |
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 | ||
375 | BUG_ON(request->ttype != tmf_task); | |
376 | ||
377 | /* This task management request has timed-out. Terminate the request | |
378 | * so that the request eventually completes to the requestor in the | |
379 | * request completion callback path. | |
380 | */ | |
381 | /* Note - the timer callback function itself has provided spinlock | |
382 | * exclusion from the start and completion paths. No need to take | |
383 | * the request->isci_host->scic_lock here. | |
384 | */ | |
385 | ||
386 | if (tmf->timeout_timer != NULL) { | |
387 | /* Call the users callback, if any. */ | |
388 | if (tmf->cb_state_func != NULL) | |
389 | tmf->cb_state_func(isci_tmf_timed_out, tmf, | |
390 | tmf->cb_data); | |
391 | ||
392 | /* Terminate the TMF transmit request. */ | |
393 | status = scic_controller_terminate_request( | |
394 | request->isci_host->core_controller, | |
3a97eec6 | 395 | to_sci_dev(request->isci_device), |
6f231dda DW |
396 | request->sci_request_handle |
397 | ); | |
398 | ||
399 | dev_dbg(&request->isci_host->pdev->dev, | |
400 | "%s: tmf_request = %p; tmf = %p; status = %d\n", | |
401 | __func__, request, tmf, status); | |
402 | } else | |
403 | dev_dbg(&request->isci_host->pdev->dev, | |
404 | "%s: timer already canceled! " | |
405 | "tmf_request = %p; tmf = %p\n", | |
406 | __func__, request, tmf); | |
407 | ||
408 | /* No need to unlock since the caller to this callback is doing it for | |
409 | * us. | |
410 | * request->isci_host->scic_lock | |
411 | */ | |
412 | } | |
413 | ||
414 | /** | |
415 | * isci_task_execute_tmf() - This function builds and sends a task request, | |
416 | * then waits for the completion. | |
417 | * @isci_host: This parameter specifies the ISCI host object | |
418 | * @tmf: This parameter is the pointer to the task management structure for | |
419 | * this request. | |
420 | * @timeout_ms: This parameter specifies the timeout period for the task | |
421 | * management request. | |
422 | * | |
423 | * TMF_RESP_FUNC_COMPLETE on successful completion of the TMF (this includes | |
424 | * error conditions reported in the IU status), or TMF_RESP_FUNC_FAILED. | |
425 | */ | |
426 | int isci_task_execute_tmf( | |
427 | struct isci_host *isci_host, | |
428 | struct isci_tmf *tmf, | |
429 | unsigned long timeout_ms) | |
430 | { | |
431 | DECLARE_COMPLETION_ONSTACK(completion); | |
467e855a | 432 | enum sci_task_status status = SCI_TASK_FAILURE; |
6f231dda DW |
433 | struct scic_sds_remote_device *sci_device; |
434 | struct isci_remote_device *isci_device = tmf->device; | |
435 | struct isci_request *request; | |
436 | int ret = TMF_RESP_FUNC_FAILED; | |
437 | unsigned long flags; | |
438 | ||
439 | /* sanity check, return TMF_RESP_FUNC_FAILED | |
440 | * if the device is not there and ready. | |
441 | */ | |
8acaec15 | 442 | if (!isci_device || isci_device->status != isci_ready_for_io) { |
6f231dda DW |
443 | dev_dbg(&isci_host->pdev->dev, |
444 | "%s: isci_device = %p not ready (%d)\n", | |
445 | __func__, | |
8acaec15 | 446 | isci_device, isci_device->status); |
6f231dda DW |
447 | return TMF_RESP_FUNC_FAILED; |
448 | } else | |
449 | dev_dbg(&isci_host->pdev->dev, | |
450 | "%s: isci_device = %p\n", | |
451 | __func__, isci_device); | |
452 | ||
3a97eec6 | 453 | sci_device = to_sci_dev(isci_device); |
6f231dda DW |
454 | |
455 | /* Assign the pointer to the TMF's completion kernel wait structure. */ | |
456 | tmf->complete = &completion; | |
457 | ||
458 | isci_task_request_build( | |
459 | isci_host, | |
460 | &request, | |
461 | tmf | |
462 | ); | |
463 | ||
464 | if (!request) { | |
465 | dev_warn(&isci_host->pdev->dev, | |
466 | "%s: isci_task_request_build failed\n", | |
467 | __func__); | |
468 | return TMF_RESP_FUNC_FAILED; | |
469 | } | |
470 | ||
471 | /* Allocate the TMF timeout timer. */ | |
6f231dda | 472 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
7c40a803 | 473 | tmf->timeout_timer = isci_timer_create(isci_host, request, isci_tmf_timeout_cb); |
6f231dda DW |
474 | |
475 | /* Start the timer. */ | |
476 | if (tmf->timeout_timer) | |
477 | isci_timer_start(tmf->timeout_timer, timeout_ms); | |
478 | else | |
479 | dev_warn(&isci_host->pdev->dev, | |
480 | "%s: isci_timer_create failed!!!!\n", | |
481 | __func__); | |
482 | ||
483 | /* start the TMF io. */ | |
484 | status = scic_controller_start_task( | |
485 | isci_host->core_controller, | |
486 | sci_device, | |
487 | request->sci_request_handle, | |
488 | SCI_CONTROLLER_INVALID_IO_TAG | |
489 | ); | |
490 | ||
467e855a | 491 | if (status != SCI_TASK_SUCCESS) { |
6f231dda DW |
492 | dev_warn(&isci_host->pdev->dev, |
493 | "%s: start_io failed - status = 0x%x, request = %p\n", | |
494 | __func__, | |
495 | status, | |
496 | request); | |
497 | goto cleanup_request; | |
498 | } | |
499 | ||
500 | /* Call the users callback, if any. */ | |
501 | if (tmf->cb_state_func != NULL) | |
502 | tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data); | |
503 | ||
504 | /* Change the state of the TMF-bearing request to "started". */ | |
505 | isci_request_change_state(request, started); | |
506 | ||
507 | /* add the request to the remote device request list. */ | |
508 | list_add(&request->dev_node, &isci_device->reqs_in_process); | |
509 | ||
510 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
511 | ||
512 | /* Wait for the TMF to complete, or a timeout. */ | |
513 | wait_for_completion(&completion); | |
514 | ||
515 | isci_print_tmf(tmf); | |
516 | ||
517 | if (tmf->status == SCI_SUCCESS) | |
518 | ret = TMF_RESP_FUNC_COMPLETE; | |
519 | else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) { | |
520 | dev_dbg(&isci_host->pdev->dev, | |
521 | "%s: tmf.status == " | |
522 | "SCI_FAILURE_IO_RESPONSE_VALID\n", | |
523 | __func__); | |
524 | ret = TMF_RESP_FUNC_COMPLETE; | |
525 | } | |
526 | /* Else - leave the default "failed" status alone. */ | |
527 | ||
528 | dev_dbg(&isci_host->pdev->dev, | |
529 | "%s: completed request = %p\n", | |
530 | __func__, | |
531 | request); | |
532 | ||
533 | if (request->io_request_completion != NULL) { | |
534 | ||
535 | /* The fact that this is non-NULL for a TMF request | |
536 | * means there is a thread waiting for this TMF to | |
537 | * finish. | |
538 | */ | |
539 | complete(request->io_request_completion); | |
540 | } | |
541 | ||
542 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
543 | ||
544 | cleanup_request: | |
545 | ||
546 | /* Clean up the timer if needed. */ | |
547 | if (tmf->timeout_timer) { | |
7c40a803 | 548 | isci_del_timer(isci_host, tmf->timeout_timer); |
6f231dda DW |
549 | tmf->timeout_timer = NULL; |
550 | } | |
551 | ||
552 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
553 | ||
554 | isci_request_free(isci_host, request); | |
555 | ||
556 | return ret; | |
557 | } | |
558 | ||
559 | void isci_task_build_tmf( | |
560 | struct isci_tmf *tmf, | |
561 | struct isci_remote_device *isci_device, | |
562 | enum isci_tmf_function_codes code, | |
563 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
564 | struct isci_tmf *, | |
565 | void *), | |
c3f42feb | 566 | void *cb_data) |
6f231dda DW |
567 | { |
568 | dev_dbg(&isci_device->isci_port->isci_host->pdev->dev, | |
569 | "%s: isci_device = %p\n", __func__, isci_device); | |
570 | ||
571 | memset(tmf, 0, sizeof(*tmf)); | |
572 | ||
573 | tmf->device = isci_device; | |
574 | tmf->tmf_code = code; | |
575 | tmf->timeout_timer = NULL; | |
576 | tmf->cb_state_func = tmf_sent_cb; | |
c3f42feb JS |
577 | tmf->cb_data = cb_data; |
578 | } | |
1fad9e93 | 579 | |
35173d57 | 580 | static void isci_task_build_abort_task_tmf( |
c3f42feb JS |
581 | struct isci_tmf *tmf, |
582 | struct isci_remote_device *isci_device, | |
583 | enum isci_tmf_function_codes code, | |
584 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
585 | struct isci_tmf *, | |
586 | void *), | |
587 | struct isci_request *old_request) | |
588 | { | |
589 | isci_task_build_tmf(tmf, isci_device, code, tmf_sent_cb, | |
590 | (void *)old_request); | |
591 | tmf->io_tag = old_request->io_tag; | |
6f231dda DW |
592 | } |
593 | ||
594 | static struct isci_request *isci_task_get_request_from_task( | |
595 | struct sas_task *task, | |
6f231dda DW |
596 | struct isci_remote_device **isci_device) |
597 | { | |
598 | ||
599 | struct isci_request *request = NULL; | |
600 | unsigned long flags; | |
601 | ||
602 | spin_lock_irqsave(&task->task_state_lock, flags); | |
603 | ||
604 | request = task->lldd_task; | |
605 | ||
606 | /* If task is already done, the request isn't valid */ | |
607 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE) && | |
608 | (task->task_state_flags & SAS_TASK_AT_INITIATOR) && | |
609 | (request != NULL)) { | |
610 | ||
6f231dda DW |
611 | if (isci_device != NULL) |
612 | *isci_device = request->isci_device; | |
613 | } | |
614 | ||
615 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
616 | ||
617 | return request; | |
618 | } | |
619 | ||
620 | /** | |
621 | * isci_task_validate_request_to_abort() - This function checks the given I/O | |
622 | * against the "started" state. If the request is still "started", it's | |
623 | * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD | |
624 | * BEFORE CALLING THIS FUNCTION. | |
625 | * @isci_request: This parameter specifies the request object to control. | |
626 | * @isci_host: This parameter specifies the ISCI host object | |
627 | * @isci_device: This is the device to which the request is pending. | |
628 | * @aborted_io_completion: This is a completion structure that will be added to | |
629 | * the request in case it is changed to aborting; this completion is | |
630 | * triggered when the request is fully completed. | |
631 | * | |
632 | * Either "started" on successful change of the task status to "aborted", or | |
633 | * "unallocated" if the task cannot be controlled. | |
634 | */ | |
635 | static enum isci_request_status isci_task_validate_request_to_abort( | |
636 | struct isci_request *isci_request, | |
637 | struct isci_host *isci_host, | |
638 | struct isci_remote_device *isci_device, | |
639 | struct completion *aborted_io_completion) | |
640 | { | |
641 | enum isci_request_status old_state = unallocated; | |
642 | ||
643 | /* Only abort the task if it's in the | |
644 | * device's request_in_process list | |
645 | */ | |
646 | if (isci_request && !list_empty(&isci_request->dev_node)) { | |
647 | old_state = isci_request_change_started_to_aborted( | |
648 | isci_request, aborted_io_completion); | |
649 | ||
6f231dda DW |
650 | } |
651 | ||
652 | return old_state; | |
653 | } | |
654 | ||
655 | static void isci_request_cleanup_completed_loiterer( | |
656 | struct isci_host *isci_host, | |
657 | struct isci_remote_device *isci_device, | |
658 | struct isci_request *isci_request) | |
659 | { | |
18d3d72a JS |
660 | struct sas_task *task; |
661 | unsigned long flags; | |
662 | ||
663 | task = (isci_request->ttype == io_task) | |
664 | ? isci_request_access_task(isci_request) | |
665 | : NULL; | |
6f231dda DW |
666 | |
667 | dev_dbg(&isci_host->pdev->dev, | |
668 | "%s: isci_device=%p, request=%p, task=%p\n", | |
18d3d72a | 669 | __func__, isci_device, isci_request, task); |
6f231dda DW |
670 | |
671 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
672 | list_del_init(&isci_request->dev_node); | |
6f231dda DW |
673 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
674 | ||
a5fde225 JS |
675 | if (task != NULL) { |
676 | ||
677 | spin_lock_irqsave(&task->task_state_lock, flags); | |
678 | task->lldd_task = NULL; | |
679 | ||
680 | isci_set_task_doneflags(task); | |
681 | ||
682 | /* If this task is not in the abort path, call task_done. */ | |
683 | if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { | |
684 | ||
685 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
686 | task->task_done(task); | |
687 | } else | |
688 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
689 | } | |
6f231dda DW |
690 | isci_request_free(isci_host, isci_request); |
691 | } | |
4dc043c4 JS |
692 | |
693 | /** | |
694 | * @isci_termination_timed_out(): this function will deal with a request for | |
695 | * which the wait for termination has timed-out. | |
696 | * | |
697 | * @isci_host This SCU. | |
698 | * @isci_request The I/O request being terminated. | |
699 | */ | |
700 | static void | |
701 | isci_termination_timed_out( | |
702 | struct isci_host * host, | |
703 | struct isci_request * request | |
704 | ) | |
705 | { | |
706 | unsigned long state_flags; | |
707 | ||
708 | dev_warn(&host->pdev->dev, | |
709 | "%s: host = %p; request = %p\n", | |
710 | __func__, host, request); | |
711 | ||
712 | /* At this point, the request to terminate | |
713 | * has timed out. The best we can do is to | |
714 | * have the request die a silent death | |
715 | * if it ever completes. | |
716 | */ | |
717 | spin_lock_irqsave(&request->state_lock, state_flags); | |
718 | ||
719 | if (request->status == started) { | |
720 | ||
721 | /* Set the request state to "dead", | |
722 | * and clear the task pointer so that an actual | |
723 | * completion event callback doesn't do | |
724 | * anything. | |
725 | */ | |
726 | request->status = dead; | |
727 | ||
728 | /* Clear the timeout completion event pointer.*/ | |
729 | request->io_request_completion = NULL; | |
730 | ||
731 | if (request->ttype == io_task) { | |
732 | ||
733 | /* Break links with the sas_task. */ | |
734 | if (request->ttype_ptr.io_task_ptr != NULL) { | |
735 | ||
736 | request->ttype_ptr.io_task_ptr->lldd_task = NULL; | |
737 | request->ttype_ptr.io_task_ptr = NULL; | |
738 | } | |
739 | } | |
740 | } | |
741 | spin_unlock_irqrestore(&request->state_lock, state_flags); | |
742 | } | |
743 | ||
744 | ||
6f231dda DW |
745 | /** |
746 | * isci_terminate_request_core() - This function will terminate the given | |
747 | * request, and wait for it to complete. This function must only be called | |
748 | * from a thread that can wait. Note that the request is terminated and | |
749 | * completed (back to the host, if started there). | |
750 | * @isci_host: This SCU. | |
751 | * @isci_device: The target. | |
752 | * @isci_request: The I/O request to be terminated. | |
753 | * | |
754 | * | |
755 | */ | |
756 | static void isci_terminate_request_core( | |
757 | struct isci_host *isci_host, | |
758 | struct isci_remote_device *isci_device, | |
cbb65c66 | 759 | struct isci_request *isci_request) |
6f231dda | 760 | { |
cbb65c66 | 761 | enum sci_status status = SCI_SUCCESS; |
6f231dda DW |
762 | bool was_terminated = false; |
763 | bool needs_cleanup_handling = false; | |
764 | enum isci_request_status request_status; | |
765 | unsigned long flags; | |
4dc043c4 JS |
766 | unsigned long timeout_remaining; |
767 | ||
6f231dda DW |
768 | |
769 | dev_dbg(&isci_host->pdev->dev, | |
770 | "%s: device = %p; request = %p\n", | |
771 | __func__, isci_device, isci_request); | |
772 | ||
6f231dda | 773 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
4dc043c4 JS |
774 | |
775 | /* Note that we are not going to control | |
776 | * the target to abort the request. | |
777 | */ | |
778 | isci_request->complete_in_target = true; | |
779 | ||
6f231dda DW |
780 | /* Make sure the request wasn't just sitting around signalling |
781 | * device condition (if the request handle is NULL, then the | |
782 | * request completed but needed additional handling here). | |
783 | */ | |
784 | if (isci_request->sci_request_handle != NULL) { | |
785 | was_terminated = true; | |
cbb65c66 | 786 | needs_cleanup_handling = true; |
6f231dda DW |
787 | status = scic_controller_terminate_request( |
788 | isci_host->core_controller, | |
3a97eec6 | 789 | to_sci_dev(isci_device), |
6f231dda DW |
790 | isci_request->sci_request_handle |
791 | ); | |
792 | } | |
793 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
794 | ||
795 | /* | |
796 | * The only time the request to terminate will | |
797 | * fail is when the io request is completed and | |
798 | * being aborted. | |
799 | */ | |
4dc043c4 | 800 | if (status != SCI_SUCCESS) { |
6f231dda DW |
801 | dev_err(&isci_host->pdev->dev, |
802 | "%s: scic_controller_terminate_request" | |
803 | " returned = 0x%x\n", | |
804 | __func__, | |
805 | status); | |
4dc043c4 JS |
806 | /* Clear the completion pointer from the request. */ |
807 | isci_request->io_request_completion = NULL; | |
808 | ||
809 | } else { | |
6f231dda DW |
810 | if (was_terminated) { |
811 | dev_dbg(&isci_host->pdev->dev, | |
812 | "%s: before completion wait (%p)\n", | |
813 | __func__, | |
cbb65c66 | 814 | isci_request->io_request_completion); |
6f231dda DW |
815 | |
816 | /* Wait here for the request to complete. */ | |
4dc043c4 JS |
817 | #define TERMINATION_TIMEOUT_MSEC 50 |
818 | timeout_remaining | |
819 | = wait_for_completion_timeout( | |
820 | isci_request->io_request_completion, | |
821 | msecs_to_jiffies(TERMINATION_TIMEOUT_MSEC)); | |
822 | ||
823 | if (!timeout_remaining) { | |
824 | ||
825 | isci_termination_timed_out(isci_host, | |
826 | isci_request); | |
827 | ||
828 | dev_err(&isci_host->pdev->dev, | |
829 | "%s: *** Timeout waiting for " | |
830 | "termination(%p/%p)\n", | |
831 | __func__, | |
832 | isci_request->io_request_completion, | |
833 | isci_request); | |
834 | ||
835 | } else | |
836 | dev_dbg(&isci_host->pdev->dev, | |
837 | "%s: after completion wait (%p)\n", | |
838 | __func__, | |
839 | isci_request->io_request_completion); | |
840 | } | |
841 | /* Clear the completion pointer from the request. */ | |
842 | isci_request->io_request_completion = NULL; | |
843 | ||
844 | /* Peek at the status of the request. This will tell | |
845 | * us if there was special handling on the request such that it | |
846 | * needs to be detached and freed here. | |
847 | */ | |
848 | spin_lock_irqsave(&isci_request->state_lock, flags); | |
849 | request_status = isci_request_get_state(isci_request); | |
850 | ||
851 | if ((isci_request->ttype == io_task) /* TMFs are in their own thread */ | |
852 | && ((request_status == aborted) | |
853 | || (request_status == aborting) | |
854 | || (request_status == terminating) | |
855 | || (request_status == completed) | |
856 | || (request_status == dead) | |
857 | ) | |
858 | ) { | |
859 | ||
860 | /* The completion routine won't free a request in | |
861 | * the aborted/aborting/etc. states, so we do | |
862 | * it here. | |
863 | */ | |
864 | needs_cleanup_handling = true; | |
6f231dda | 865 | } |
4dc043c4 | 866 | spin_unlock_irqrestore(&isci_request->state_lock, flags); |
6f231dda DW |
867 | |
868 | if (needs_cleanup_handling) | |
869 | isci_request_cleanup_completed_loiterer( | |
870 | isci_host, isci_device, isci_request | |
871 | ); | |
872 | } | |
873 | } | |
cbb65c66 | 874 | |
6f231dda DW |
875 | static void isci_terminate_request( |
876 | struct isci_host *isci_host, | |
877 | struct isci_remote_device *isci_device, | |
878 | struct isci_request *isci_request, | |
879 | enum isci_request_status new_request_state) | |
880 | { | |
881 | enum isci_request_status old_state; | |
6f231dda | 882 | DECLARE_COMPLETION_ONSTACK(request_completion); |
6f231dda DW |
883 | |
884 | /* Change state to "new_request_state" if it is currently "started" */ | |
885 | old_state = isci_request_change_started_to_newstate( | |
886 | isci_request, | |
887 | &request_completion, | |
888 | new_request_state | |
889 | ); | |
890 | ||
f219f010 JS |
891 | if ((old_state == started) || |
892 | (old_state == completed) || | |
893 | (old_state == aborting)) { | |
6f231dda | 894 | |
a5fde225 JS |
895 | /* If the old_state is started: |
896 | * This request was not already being aborted. If it had been, | |
6f231dda DW |
897 | * then the aborting I/O (ie. the TMF request) would not be in |
898 | * the aborting state, and thus would be terminated here. Note | |
899 | * that since the TMF completion's call to the kernel function | |
900 | * "complete()" does not happen until the pending I/O request | |
901 | * terminate fully completes, we do not have to implement a | |
902 | * special wait here for already aborting requests - the | |
903 | * termination of the TMF request will force the request | |
904 | * to finish it's already started terminate. | |
a5fde225 JS |
905 | * |
906 | * If old_state == completed: | |
907 | * This request completed from the SCU hardware perspective | |
908 | * and now just needs cleaning up in terms of freeing the | |
909 | * request and potentially calling up to libsas. | |
f219f010 JS |
910 | * |
911 | * If old_state == aborting: | |
912 | * This request has already gone through a TMF timeout, but may | |
913 | * not have been terminated; needs cleaning up at least. | |
6f231dda DW |
914 | */ |
915 | isci_terminate_request_core(isci_host, isci_device, | |
cbb65c66 | 916 | isci_request); |
a5fde225 | 917 | } |
6f231dda DW |
918 | } |
919 | ||
920 | /** | |
921 | * isci_terminate_pending_requests() - This function will change the all of the | |
922 | * requests on the given device's state to "aborting", will terminate the | |
923 | * requests, and wait for them to complete. This function must only be | |
924 | * called from a thread that can wait. Note that the requests are all | |
925 | * terminated and completed (back to the host, if started there). | |
926 | * @isci_host: This parameter specifies SCU. | |
927 | * @isci_device: This parameter specifies the target. | |
928 | * | |
929 | * | |
930 | */ | |
931 | void isci_terminate_pending_requests( | |
932 | struct isci_host *isci_host, | |
933 | struct isci_remote_device *isci_device, | |
934 | enum isci_request_status new_request_state) | |
935 | { | |
4dc043c4 JS |
936 | struct isci_request *request; |
937 | struct isci_request *next_request; | |
938 | unsigned long flags; | |
939 | struct list_head aborted_request_list; | |
940 | ||
941 | INIT_LIST_HEAD(&aborted_request_list); | |
6f231dda DW |
942 | |
943 | dev_dbg(&isci_host->pdev->dev, | |
944 | "%s: isci_device = %p (new request state = %d)\n", | |
945 | __func__, isci_device, new_request_state); | |
946 | ||
4dc043c4 | 947 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
6f231dda | 948 | |
4dc043c4 JS |
949 | /* Move all of the pending requests off of the device list. */ |
950 | list_splice_init(&isci_device->reqs_in_process, | |
951 | &aborted_request_list); | |
6f231dda | 952 | |
4dc043c4 | 953 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
6f231dda | 954 | |
4dc043c4 JS |
955 | /* Iterate through the now-local list. */ |
956 | list_for_each_entry_safe(request, next_request, | |
957 | &aborted_request_list, dev_node) { | |
6f231dda | 958 | |
4dc043c4 JS |
959 | dev_warn(&isci_host->pdev->dev, |
960 | "%s: isci_device=%p request=%p; task=%p\n", | |
961 | __func__, | |
962 | isci_device, request, | |
963 | ((request->ttype == io_task) | |
964 | ? isci_request_access_task(request) | |
965 | : NULL)); | |
966 | ||
967 | /* Mark all still pending I/O with the selected next | |
968 | * state, terminate and free it. | |
969 | */ | |
970 | isci_terminate_request(isci_host, isci_device, | |
971 | request, new_request_state | |
972 | ); | |
973 | } | |
6f231dda DW |
974 | } |
975 | ||
976 | /** | |
977 | * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain | |
978 | * Template functions. | |
979 | * @lun: This parameter specifies the lun to be reset. | |
980 | * | |
981 | * status, zero indicates success. | |
982 | */ | |
983 | static int isci_task_send_lu_reset_sas( | |
984 | struct isci_host *isci_host, | |
985 | struct isci_remote_device *isci_device, | |
986 | u8 *lun) | |
987 | { | |
988 | struct isci_tmf tmf; | |
989 | int ret = TMF_RESP_FUNC_FAILED; | |
990 | ||
991 | dev_dbg(&isci_host->pdev->dev, | |
992 | "%s: isci_host = %p, isci_device = %p\n", | |
993 | __func__, isci_host, isci_device); | |
994 | /* Send the LUN reset to the target. By the time the call returns, | |
995 | * the TMF has fully exected in the target (in which case the return | |
996 | * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or | |
997 | * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED"). | |
998 | */ | |
999 | isci_task_build_tmf(&tmf, isci_device, isci_tmf_ssp_lun_reset, NULL, | |
1000 | NULL); | |
1001 | ||
1002 | #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */ | |
1003 | ret = isci_task_execute_tmf(isci_host, &tmf, ISCI_LU_RESET_TIMEOUT_MS); | |
1004 | ||
1005 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
1006 | dev_dbg(&isci_host->pdev->dev, | |
1007 | "%s: %p: TMF_LU_RESET passed\n", | |
1008 | __func__, isci_device); | |
1009 | else | |
1010 | dev_dbg(&isci_host->pdev->dev, | |
1011 | "%s: %p: TMF_LU_RESET failed (%x)\n", | |
1012 | __func__, isci_device, ret); | |
1013 | ||
1014 | return ret; | |
1015 | } | |
1016 | ||
1017 | /** | |
1018 | * isci_task_lu_reset() - This function is one of the SAS Domain Template | |
1019 | * functions. This is one of the Task Management functoins called by libsas, | |
1020 | * to reset the given lun. Note the assumption that while this call is | |
1021 | * executing, no I/O will be sent by the host to the device. | |
1022 | * @lun: This parameter specifies the lun to be reset. | |
1023 | * | |
1024 | * status, zero indicates success. | |
1025 | */ | |
4393aa4e | 1026 | int isci_task_lu_reset(struct domain_device *domain_device, u8 *lun) |
6f231dda | 1027 | { |
4393aa4e | 1028 | struct isci_host *isci_host = dev_to_ihost(domain_device); |
6f231dda DW |
1029 | struct isci_remote_device *isci_device = NULL; |
1030 | int ret; | |
1031 | bool device_stopping = false; | |
1032 | ||
4393aa4e | 1033 | isci_device = domain_device->lldd_dev; |
6f231dda | 1034 | |
4393aa4e DW |
1035 | dev_dbg(&isci_host->pdev->dev, |
1036 | "%s: domain_device=%p, isci_host=%p; isci_device=%p\n", | |
6f231dda DW |
1037 | __func__, domain_device, isci_host, isci_device); |
1038 | ||
1039 | if (isci_device != NULL) | |
1040 | device_stopping = (isci_device->status == isci_stopping) | |
1041 | || (isci_device->status == isci_stopped); | |
1042 | ||
1043 | /* If there is a device reset pending on any request in the | |
1044 | * device's list, fail this LUN reset request in order to | |
1045 | * escalate to the device reset. | |
1046 | */ | |
4393aa4e DW |
1047 | if (!isci_device || device_stopping || |
1048 | isci_device_is_reset_pending(isci_host, isci_device)) { | |
6f231dda | 1049 | dev_warn(&isci_host->pdev->dev, |
4393aa4e | 1050 | "%s: No dev (%p), or " |
6f231dda | 1051 | "RESET PENDING: domain_device=%p\n", |
4393aa4e | 1052 | __func__, isci_device, domain_device); |
6f231dda DW |
1053 | return TMF_RESP_FUNC_FAILED; |
1054 | } | |
1055 | ||
6f231dda DW |
1056 | /* Send the task management part of the reset. */ |
1057 | if (sas_protocol_ata(domain_device->tproto)) { | |
4393aa4e | 1058 | ret = isci_task_send_lu_reset_sata(isci_host, isci_device, lun); |
6f231dda DW |
1059 | } else |
1060 | ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun); | |
1061 | ||
1062 | /* If the LUN reset worked, all the I/O can now be terminated. */ | |
1063 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
1064 | /* Terminate all I/O now. */ | |
1065 | isci_terminate_pending_requests(isci_host, | |
1066 | isci_device, | |
1067 | terminating); | |
1068 | ||
6f231dda DW |
1069 | return ret; |
1070 | } | |
1071 | ||
1072 | ||
1073 | /* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */ | |
1074 | int isci_task_clear_nexus_port(struct asd_sas_port *port) | |
1075 | { | |
1076 | return TMF_RESP_FUNC_FAILED; | |
1077 | } | |
1078 | ||
1079 | ||
1080 | ||
1081 | int isci_task_clear_nexus_ha(struct sas_ha_struct *ha) | |
1082 | { | |
1083 | return TMF_RESP_FUNC_FAILED; | |
1084 | } | |
1085 | ||
1086 | int isci_task_I_T_nexus_reset(struct domain_device *dev) | |
1087 | { | |
1088 | return TMF_RESP_FUNC_FAILED; | |
1089 | } | |
1090 | ||
1091 | ||
1092 | /* Task Management Functions. Must be called from process context. */ | |
1093 | ||
1094 | /** | |
1095 | * isci_abort_task_process_cb() - This is a helper function for the abort task | |
1096 | * TMF command. It manages the request state with respect to the successful | |
1097 | * transmission / completion of the abort task request. | |
1098 | * @cb_state: This parameter specifies when this function was called - after | |
1099 | * the TMF request has been started and after it has timed-out. | |
1100 | * @tmf: This parameter specifies the TMF in progress. | |
1101 | * | |
1102 | * | |
1103 | */ | |
1104 | static void isci_abort_task_process_cb( | |
1105 | enum isci_tmf_cb_state cb_state, | |
1106 | struct isci_tmf *tmf, | |
1107 | void *cb_data) | |
1108 | { | |
1109 | struct isci_request *old_request; | |
1110 | ||
1111 | old_request = (struct isci_request *)cb_data; | |
1112 | ||
1113 | dev_dbg(&old_request->isci_host->pdev->dev, | |
1114 | "%s: tmf=%p, old_request=%p\n", | |
1115 | __func__, tmf, old_request); | |
1116 | ||
1117 | switch (cb_state) { | |
1118 | ||
1119 | case isci_tmf_started: | |
1120 | /* The TMF has been started. Nothing to do here, since the | |
1121 | * request state was already set to "aborted" by the abort | |
1122 | * task function. | |
1123 | */ | |
70957a94 JS |
1124 | BUG_ON((old_request->status != aborted) |
1125 | && (old_request->status != completed)); | |
6f231dda DW |
1126 | break; |
1127 | ||
1128 | case isci_tmf_timed_out: | |
1129 | ||
1130 | /* Set the task's state to "aborting", since the abort task | |
1131 | * function thread set it to "aborted" (above) in anticipation | |
1132 | * of the task management request working correctly. Since the | |
1133 | * timeout has now fired, the TMF request failed. We set the | |
1134 | * state such that the request completion will indicate the | |
1135 | * device is no longer present. | |
1136 | */ | |
1137 | isci_request_change_state(old_request, aborting); | |
1138 | break; | |
1139 | ||
1140 | default: | |
1141 | dev_err(&old_request->isci_host->pdev->dev, | |
1142 | "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n", | |
1143 | __func__, cb_state, tmf, old_request); | |
1144 | break; | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | /** | |
1149 | * isci_task_abort_task() - This function is one of the SAS Domain Template | |
1150 | * functions. This function is called by libsas to abort a specified task. | |
1151 | * @task: This parameter specifies the SAS task to abort. | |
1152 | * | |
1153 | * status, zero indicates success. | |
1154 | */ | |
1155 | int isci_task_abort_task(struct sas_task *task) | |
1156 | { | |
4393aa4e | 1157 | struct isci_host *isci_host = dev_to_ihost(task->dev); |
6f231dda | 1158 | DECLARE_COMPLETION_ONSTACK(aborted_io_completion); |
a5fde225 JS |
1159 | struct isci_request *old_request = NULL; |
1160 | enum isci_request_status old_state; | |
6f231dda | 1161 | struct isci_remote_device *isci_device = NULL; |
a5fde225 JS |
1162 | struct isci_tmf tmf; |
1163 | int ret = TMF_RESP_FUNC_FAILED; | |
1164 | unsigned long flags; | |
1165 | bool any_dev_reset = false; | |
1166 | bool device_stopping; | |
6f231dda DW |
1167 | |
1168 | /* Get the isci_request reference from the task. Note that | |
1169 | * this check does not depend on the pending request list | |
1170 | * in the device, because tasks driving resets may land here | |
1171 | * after completion in the core. | |
1172 | */ | |
4393aa4e | 1173 | old_request = isci_task_get_request_from_task(task, &isci_device); |
6f231dda DW |
1174 | |
1175 | dev_dbg(&isci_host->pdev->dev, | |
1176 | "%s: task = %p\n", __func__, task); | |
1177 | ||
1178 | /* Check if the device has been / is currently being removed. | |
1179 | * If so, no task management will be done, and the I/O will | |
1180 | * be terminated. | |
1181 | */ | |
1182 | device_stopping = (isci_device->status == isci_stopping) | |
1183 | || (isci_device->status == isci_stopped); | |
1184 | ||
6f231dda DW |
1185 | /* This version of the driver will fail abort requests for |
1186 | * SATA/STP. Failing the abort request this way will cause the | |
1187 | * SCSI error handler thread to escalate to LUN reset | |
1188 | */ | |
1189 | if (sas_protocol_ata(task->task_proto) && !device_stopping) { | |
1190 | dev_warn(&isci_host->pdev->dev, | |
1191 | " task %p is for a STP/SATA device;" | |
1192 | " returning TMF_RESP_FUNC_FAILED\n" | |
1193 | " to cause a LUN reset...\n", task); | |
1194 | return TMF_RESP_FUNC_FAILED; | |
1195 | } | |
1196 | ||
1197 | dev_dbg(&isci_host->pdev->dev, | |
1198 | "%s: old_request == %p\n", __func__, old_request); | |
1199 | ||
a5fde225 JS |
1200 | if (!device_stopping) |
1201 | any_dev_reset = isci_device_is_reset_pending(isci_host,isci_device); | |
1202 | ||
6f231dda DW |
1203 | spin_lock_irqsave(&task->task_state_lock, flags); |
1204 | ||
1205 | /* Don't do resets to stopping devices. */ | |
a5fde225 | 1206 | if (device_stopping) { |
6f231dda | 1207 | |
a5fde225 JS |
1208 | task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET; |
1209 | any_dev_reset = false; | |
6f231dda | 1210 | |
a5fde225 | 1211 | } else /* See if there is a pending device reset for this device. */ |
6f231dda | 1212 | any_dev_reset = any_dev_reset |
a5fde225 | 1213 | || (task->task_state_flags & SAS_TASK_NEED_DEV_RESET); |
6f231dda DW |
1214 | |
1215 | /* If the extraction of the request reference from the task | |
1216 | * failed, then the request has been completed (or if there is a | |
1217 | * pending reset then this abort request function must be failed | |
1218 | * in order to escalate to the target reset). | |
1219 | */ | |
a5fde225 | 1220 | if ((old_request == NULL) || any_dev_reset) { |
6f231dda DW |
1221 | |
1222 | /* If the device reset task flag is set, fail the task | |
1223 | * management request. Otherwise, the original request | |
1224 | * has completed. | |
1225 | */ | |
1226 | if (any_dev_reset) { | |
1227 | ||
1228 | /* Turn off the task's DONE to make sure this | |
1229 | * task is escalated to a target reset. | |
1230 | */ | |
1231 | task->task_state_flags &= ~SAS_TASK_STATE_DONE; | |
1232 | ||
a5fde225 JS |
1233 | /* Make the reset happen as soon as possible. */ |
1234 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
1235 | ||
1236 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1237 | ||
6f231dda DW |
1238 | /* Fail the task management request in order to |
1239 | * escalate to the target reset. | |
1240 | */ | |
1241 | ret = TMF_RESP_FUNC_FAILED; | |
1242 | ||
1243 | dev_dbg(&isci_host->pdev->dev, | |
1244 | "%s: Failing task abort in order to " | |
1245 | "escalate to target reset because\n" | |
1246 | "SAS_TASK_NEED_DEV_RESET is set for " | |
1247 | "task %p on dev %p\n", | |
1248 | __func__, task, isci_device); | |
1249 | ||
6f231dda | 1250 | |
a5fde225 | 1251 | } else { |
6f231dda DW |
1252 | /* The request has already completed and there |
1253 | * is nothing to do here other than to set the task | |
1254 | * done bit, and indicate that the task abort function | |
1255 | * was sucessful. | |
1256 | */ | |
1257 | isci_set_task_doneflags(task); | |
1258 | ||
a5fde225 | 1259 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
6f231dda | 1260 | |
a5fde225 | 1261 | ret = TMF_RESP_FUNC_COMPLETE; |
6f231dda | 1262 | |
a5fde225 JS |
1263 | dev_dbg(&isci_host->pdev->dev, |
1264 | "%s: abort task not needed for %p\n", | |
1265 | __func__, task); | |
6f231dda | 1266 | } |
6f231dda DW |
1267 | |
1268 | return ret; | |
1269 | } | |
a5fde225 JS |
1270 | else |
1271 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
6f231dda DW |
1272 | |
1273 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
1274 | ||
f219f010 | 1275 | /* Check the request status and change to "aborted" if currently |
a5fde225 | 1276 | * "starting"; if true then set the I/O kernel completion |
6f231dda DW |
1277 | * struct that will be triggered when the request completes. |
1278 | */ | |
a5fde225 JS |
1279 | old_state = isci_task_validate_request_to_abort( |
1280 | old_request, isci_host, isci_device, | |
1281 | &aborted_io_completion); | |
f219f010 JS |
1282 | if ((old_state != started) && |
1283 | (old_state != completed) && | |
1284 | (old_state != aborting)) { | |
6f231dda DW |
1285 | |
1286 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1287 | ||
a5fde225 JS |
1288 | /* The request was already being handled by someone else (because |
1289 | * they got to set the state away from started). | |
1290 | */ | |
1291 | dev_dbg(&isci_host->pdev->dev, | |
1292 | "%s: device = %p; old_request %p already being aborted\n", | |
1293 | __func__, | |
1294 | isci_device, old_request); | |
6f231dda DW |
1295 | |
1296 | return TMF_RESP_FUNC_COMPLETE; | |
1297 | } | |
a5fde225 JS |
1298 | if ((task->task_proto == SAS_PROTOCOL_SMP) |
1299 | || device_stopping | |
1300 | || old_request->complete_in_target | |
1301 | ) { | |
6f231dda DW |
1302 | |
1303 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1304 | ||
a5fde225 JS |
1305 | dev_dbg(&isci_host->pdev->dev, |
1306 | "%s: SMP request (%d)" | |
1307 | " or device is stopping (%d)" | |
1308 | " or complete_in_target (%d), thus no TMF\n", | |
1309 | __func__, (task->task_proto == SAS_PROTOCOL_SMP), | |
1310 | device_stopping, old_request->complete_in_target); | |
1311 | ||
6f231dda DW |
1312 | /* Set the state on the task. */ |
1313 | isci_task_all_done(task); | |
1314 | ||
1315 | ret = TMF_RESP_FUNC_COMPLETE; | |
1316 | ||
1317 | /* Stopping and SMP devices are not sent a TMF, and are not | |
a5fde225 | 1318 | * reset, but the outstanding I/O request is terminated below. |
6f231dda | 1319 | */ |
6f231dda DW |
1320 | } else { |
1321 | /* Fill in the tmf stucture */ | |
c3f42feb JS |
1322 | isci_task_build_abort_task_tmf(&tmf, isci_device, |
1323 | isci_tmf_ssp_task_abort, | |
1324 | isci_abort_task_process_cb, | |
1325 | old_request); | |
6f231dda | 1326 | |
6f231dda DW |
1327 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
1328 | ||
1329 | #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */ | |
1330 | ret = isci_task_execute_tmf(isci_host, &tmf, | |
1331 | ISCI_ABORT_TASK_TIMEOUT_MS); | |
1332 | ||
a5fde225 | 1333 | if (ret != TMF_RESP_FUNC_COMPLETE) |
6f231dda DW |
1334 | dev_err(&isci_host->pdev->dev, |
1335 | "%s: isci_task_send_tmf failed\n", | |
1336 | __func__); | |
1337 | } | |
a5fde225 JS |
1338 | if (ret == TMF_RESP_FUNC_COMPLETE) { |
1339 | old_request->complete_in_target = true; | |
1340 | ||
1341 | /* Clean up the request on our side, and wait for the aborted I/O to | |
1342 | * complete. | |
1343 | */ | |
cbb65c66 | 1344 | isci_terminate_request_core(isci_host, isci_device, old_request); |
a5fde225 | 1345 | } |
6f231dda | 1346 | |
a5fde225 JS |
1347 | /* Make sure we do not leave a reference to aborted_io_completion */ |
1348 | old_request->io_request_completion = NULL; | |
6f231dda DW |
1349 | return ret; |
1350 | } | |
1351 | ||
1352 | /** | |
1353 | * isci_task_abort_task_set() - This function is one of the SAS Domain Template | |
1354 | * functions. This is one of the Task Management functoins called by libsas, | |
1355 | * to abort all task for the given lun. | |
1356 | * @d_device: This parameter specifies the domain device associated with this | |
1357 | * request. | |
1358 | * @lun: This parameter specifies the lun associated with this request. | |
1359 | * | |
1360 | * status, zero indicates success. | |
1361 | */ | |
1362 | int isci_task_abort_task_set( | |
1363 | struct domain_device *d_device, | |
1364 | u8 *lun) | |
1365 | { | |
1366 | return TMF_RESP_FUNC_FAILED; | |
1367 | } | |
1368 | ||
1369 | ||
1370 | /** | |
1371 | * isci_task_clear_aca() - This function is one of the SAS Domain Template | |
1372 | * functions. This is one of the Task Management functoins called by libsas. | |
1373 | * @d_device: This parameter specifies the domain device associated with this | |
1374 | * request. | |
1375 | * @lun: This parameter specifies the lun associated with this request. | |
1376 | * | |
1377 | * status, zero indicates success. | |
1378 | */ | |
1379 | int isci_task_clear_aca( | |
1380 | struct domain_device *d_device, | |
1381 | u8 *lun) | |
1382 | { | |
1383 | return TMF_RESP_FUNC_FAILED; | |
1384 | } | |
1385 | ||
1386 | ||
1387 | ||
1388 | /** | |
1389 | * isci_task_clear_task_set() - This function is one of the SAS Domain Template | |
1390 | * functions. This is one of the Task Management functoins called by libsas. | |
1391 | * @d_device: This parameter specifies the domain device associated with this | |
1392 | * request. | |
1393 | * @lun: This parameter specifies the lun associated with this request. | |
1394 | * | |
1395 | * status, zero indicates success. | |
1396 | */ | |
1397 | int isci_task_clear_task_set( | |
1398 | struct domain_device *d_device, | |
1399 | u8 *lun) | |
1400 | { | |
1401 | return TMF_RESP_FUNC_FAILED; | |
1402 | } | |
1403 | ||
1404 | ||
1405 | /** | |
1406 | * isci_task_query_task() - This function is implemented to cause libsas to | |
1407 | * correctly escalate the failed abort to a LUN or target reset (this is | |
1408 | * because sas_scsi_find_task libsas function does not correctly interpret | |
1409 | * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is | |
1410 | * returned, libsas turns this into a LUN reset; when FUNC_FAILED is | |
1411 | * returned, libsas will turn this into a target reset | |
1412 | * @task: This parameter specifies the sas task being queried. | |
1413 | * @lun: This parameter specifies the lun associated with this request. | |
1414 | * | |
1415 | * status, zero indicates success. | |
1416 | */ | |
1417 | int isci_task_query_task( | |
1418 | struct sas_task *task) | |
1419 | { | |
1420 | /* See if there is a pending device reset for this device. */ | |
1421 | if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) | |
1422 | return TMF_RESP_FUNC_FAILED; | |
1423 | else | |
1424 | return TMF_RESP_FUNC_SUCC; | |
1425 | } | |
1426 | ||
1427 | /** | |
1428 | * isci_task_request_complete() - This function is called by the sci core when | |
1429 | * an task request completes. | |
1430 | * @isci_host: This parameter specifies the ISCI host object | |
1431 | * @request: This parameter is the completed isci_request object. | |
1432 | * @completion_status: This parameter specifies the completion status from the | |
1433 | * sci core. | |
1434 | * | |
1435 | * none. | |
1436 | */ | |
1437 | void isci_task_request_complete( | |
1438 | struct isci_host *isci_host, | |
1439 | struct isci_request *request, | |
1440 | enum sci_task_status completion_status) | |
1441 | { | |
1442 | struct isci_remote_device *isci_device = request->isci_device; | |
1443 | enum isci_request_status old_state; | |
1444 | struct isci_tmf *tmf = isci_request_access_tmf(request); | |
1445 | struct completion *tmf_complete; | |
1446 | ||
1447 | dev_dbg(&isci_host->pdev->dev, | |
1448 | "%s: request = %p, status=%d\n", | |
1449 | __func__, request, completion_status); | |
1450 | ||
1451 | old_state = isci_request_change_state(request, completed); | |
1452 | ||
1453 | tmf->status = completion_status; | |
1454 | request->complete_in_target = true; | |
1455 | ||
1456 | if (SAS_PROTOCOL_SSP == tmf->proto) { | |
1457 | ||
1458 | memcpy(&tmf->resp.resp_iu, | |
1459 | scic_io_request_get_response_iu_address( | |
1460 | request->sci_request_handle | |
1461 | ), | |
1462 | sizeof(struct sci_ssp_response_iu)); | |
1463 | ||
1464 | } else if (SAS_PROTOCOL_SATA == tmf->proto) { | |
1465 | ||
1466 | memcpy(&tmf->resp.d2h_fis, | |
1467 | scic_stp_io_request_get_d2h_reg_address( | |
1468 | request->sci_request_handle | |
1469 | ), | |
1470 | sizeof(struct sata_fis_reg_d2h) | |
1471 | ); | |
1472 | } | |
1473 | ||
1474 | /* Manage the timer if it is still running. */ | |
1475 | if (tmf->timeout_timer) { | |
7c40a803 | 1476 | isci_del_timer(isci_host, tmf->timeout_timer); |
6f231dda DW |
1477 | tmf->timeout_timer = NULL; |
1478 | } | |
1479 | ||
1480 | /* PRINT_TMF( ((struct isci_tmf *)request->task)); */ | |
1481 | tmf_complete = tmf->complete; | |
1482 | ||
c629582d | 1483 | scic_controller_complete_io( |
6f231dda | 1484 | isci_host->core_controller, |
3a97eec6 | 1485 | to_sci_dev(isci_device), |
6f231dda DW |
1486 | request->sci_request_handle |
1487 | ); | |
1488 | /* NULL the request handle to make sure it cannot be terminated | |
1489 | * or completed again. | |
1490 | */ | |
1491 | request->sci_request_handle = NULL; | |
1492 | ||
1493 | isci_request_change_state(request, unallocated); | |
1494 | list_del_init(&request->dev_node); | |
1495 | ||
1496 | /* The task management part completes last. */ | |
1497 | complete(tmf_complete); | |
1498 | } | |
1499 | ||
1500 | ||
1501 | /** | |
1502 | * isci_task_ssp_request_get_lun() - This function is called by the sci core to | |
1503 | * retrieve the lun for a given task request. | |
1504 | * @request: This parameter is the isci_request object. | |
1505 | * | |
1506 | * lun for specified task request. | |
1507 | */ | |
6f231dda DW |
1508 | |
1509 | /** | |
1510 | * isci_task_ssp_request_get_function() - This function is called by the sci | |
1511 | * core to retrieve the function for a given task request. | |
1512 | * @request: This parameter is the isci_request object. | |
1513 | * | |
1514 | * function code for specified task request. | |
1515 | */ | |
1516 | u8 isci_task_ssp_request_get_function(struct isci_request *request) | |
1517 | { | |
1518 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1519 | ||
1520 | dev_dbg(&request->isci_host->pdev->dev, | |
1521 | "%s: func = %d\n", __func__, isci_tmf->tmf_code); | |
1522 | ||
1523 | return isci_tmf->tmf_code; | |
1524 | } | |
1525 | ||
1526 | /** | |
1527 | * isci_task_ssp_request_get_io_tag_to_manage() - This function is called by | |
1528 | * the sci core to retrieve the io tag for a given task request. | |
1529 | * @request: This parameter is the isci_request object. | |
1530 | * | |
1531 | * io tag for specified task request. | |
1532 | */ | |
1533 | u16 isci_task_ssp_request_get_io_tag_to_manage(struct isci_request *request) | |
1534 | { | |
1535 | u16 io_tag = SCI_CONTROLLER_INVALID_IO_TAG; | |
1536 | ||
1537 | if (tmf_task == request->ttype) { | |
1538 | struct isci_tmf *tmf = isci_request_access_tmf(request); | |
1539 | io_tag = tmf->io_tag; | |
1540 | } | |
1541 | ||
1542 | dev_dbg(&request->isci_host->pdev->dev, | |
1543 | "%s: request = %p, io_tag = %d\n", | |
1544 | __func__, request, io_tag); | |
1545 | ||
1546 | return io_tag; | |
1547 | } | |
1548 | ||
1549 | /** | |
1550 | * isci_task_ssp_request_get_response_data_address() - This function is called | |
1551 | * by the sci core to retrieve the response data address for a given task | |
1552 | * request. | |
1553 | * @request: This parameter is the isci_request object. | |
1554 | * | |
1555 | * response data address for specified task request. | |
1556 | */ | |
1557 | void *isci_task_ssp_request_get_response_data_address( | |
1558 | struct isci_request *request) | |
1559 | { | |
1560 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1561 | ||
1562 | return &isci_tmf->resp.resp_iu; | |
1563 | } | |
1564 | ||
1565 | /** | |
1566 | * isci_task_ssp_request_get_response_data_length() - This function is called | |
1567 | * by the sci core to retrieve the response data length for a given task | |
1568 | * request. | |
1569 | * @request: This parameter is the isci_request object. | |
1570 | * | |
1571 | * response data length for specified task request. | |
1572 | */ | |
1573 | u32 isci_task_ssp_request_get_response_data_length( | |
1574 | struct isci_request *request) | |
1575 | { | |
1576 | struct isci_tmf *isci_tmf = isci_request_access_tmf(request); | |
1577 | ||
1578 | return sizeof(isci_tmf->resp.resp_iu); | |
1579 | } | |
1580 | ||
1581 | /** | |
1582 | * isci_bus_reset_handler() - This function performs a target reset of the | |
1583 | * device referenced by "cmd'. This function is exported through the | |
1584 | * "struct scsi_host_template" structure such that it is called when an I/O | |
1585 | * recovery process has escalated to a target reset. Note that this function | |
1586 | * is called from the scsi error handler event thread, so may block on calls. | |
1587 | * @scsi_cmd: This parameter specifies the target to be reset. | |
1588 | * | |
1589 | * SUCCESS if the reset process was successful, else FAILED. | |
1590 | */ | |
1591 | int isci_bus_reset_handler(struct scsi_cmnd *cmd) | |
1592 | { | |
4393aa4e DW |
1593 | struct domain_device *dev = cmd_to_domain_dev(cmd); |
1594 | struct isci_host *isci_host = dev_to_ihost(dev); | |
6f231dda | 1595 | unsigned long flags = 0; |
6f231dda DW |
1596 | enum sci_status status; |
1597 | int base_status; | |
4393aa4e | 1598 | struct isci_remote_device *isci_dev = dev->lldd_dev; |
6f231dda | 1599 | |
4393aa4e | 1600 | dev_dbg(&isci_host->pdev->dev, |
6f231dda DW |
1601 | "%s: cmd %p, isci_dev %p\n", |
1602 | __func__, cmd, isci_dev); | |
1603 | ||
1604 | if (!isci_dev) { | |
4393aa4e | 1605 | dev_warn(&isci_host->pdev->dev, |
6f231dda DW |
1606 | "%s: isci_dev is GONE!\n", |
1607 | __func__); | |
1608 | ||
1609 | return TMF_RESP_FUNC_COMPLETE; /* Nothing to reset. */ | |
1610 | } | |
1611 | ||
4393aa4e | 1612 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
3a97eec6 | 1613 | status = scic_remote_device_reset(to_sci_dev(isci_dev)); |
6f231dda | 1614 | if (status != SCI_SUCCESS) { |
4393aa4e | 1615 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
6f231dda DW |
1616 | |
1617 | scmd_printk(KERN_WARNING, cmd, | |
1618 | "%s: scic_remote_device_reset(%p) returned %d!\n", | |
1619 | __func__, isci_dev, status); | |
1620 | ||
1621 | return TMF_RESP_FUNC_FAILED; | |
1622 | } | |
4393aa4e | 1623 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
6f231dda | 1624 | |
6f231dda | 1625 | /* Make sure all pending requests are able to be fully terminated. */ |
4393aa4e | 1626 | isci_device_clear_reset_pending(isci_host, isci_dev); |
6f231dda DW |
1627 | |
1628 | /* Terminate in-progress I/O now. */ | |
4393aa4e | 1629 | isci_remote_device_nuke_requests(isci_host, isci_dev); |
6f231dda DW |
1630 | |
1631 | /* Call into the libsas default handler (which calls sas_phy_reset). */ | |
1632 | base_status = sas_eh_bus_reset_handler(cmd); | |
1633 | ||
1634 | if (base_status != SUCCESS) { | |
1635 | ||
1636 | /* There can be cases where the resets to individual devices | |
1637 | * behind an expander will fail because of an unplug of the | |
1638 | * expander itself. | |
1639 | */ | |
1640 | scmd_printk(KERN_WARNING, cmd, | |
1641 | "%s: sas_eh_bus_reset_handler(%p) returned %d!\n", | |
1642 | __func__, cmd, base_status); | |
1643 | } | |
1644 | ||
1645 | /* WHAT TO DO HERE IF sas_phy_reset FAILS? */ | |
4393aa4e | 1646 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
3a97eec6 | 1647 | status = scic_remote_device_reset_complete(to_sci_dev(isci_dev)); |
4393aa4e | 1648 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
6f231dda DW |
1649 | |
1650 | if (status != SCI_SUCCESS) { | |
1651 | scmd_printk(KERN_WARNING, cmd, | |
1652 | "%s: scic_remote_device_reset_complete(%p) " | |
1653 | "returned %d!\n", | |
1654 | __func__, isci_dev, status); | |
1655 | } | |
1656 | /* WHAT TO DO HERE IF scic_remote_device_reset_complete FAILS? */ | |
1657 | ||
4393aa4e | 1658 | dev_dbg(&isci_host->pdev->dev, |
6f231dda DW |
1659 | "%s: cmd %p, isci_dev %p complete.\n", |
1660 | __func__, cmd, isci_dev); | |
1661 | ||
6f231dda DW |
1662 | return TMF_RESP_FUNC_COMPLETE; |
1663 | } |