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> |
af5ae893 | 58 | #include "sas.h" |
61aaff49 | 59 | #include <scsi/libsas.h> |
88f3b62a DW |
60 | #include "remote_device.h" |
61 | #include "remote_node_context.h" | |
6f231dda DW |
62 | #include "isci.h" |
63 | #include "request.h" | |
6f231dda | 64 | #include "task.h" |
312e0c24 | 65 | #include "host.h" |
af5ae893 | 66 | |
50e7f9b5 | 67 | /** |
1077a574 DW |
68 | * isci_task_refuse() - complete the request to the upper layer driver in |
69 | * the case where an I/O needs to be completed back in the submit path. | |
70 | * @ihost: host on which the the request was queued | |
71 | * @task: request to complete | |
72 | * @response: response code for the completed task. | |
73 | * @status: status code for the completed task. | |
50e7f9b5 | 74 | * |
50e7f9b5 | 75 | */ |
1077a574 DW |
76 | static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task, |
77 | enum service_response response, | |
78 | enum exec_status status) | |
79 | ||
50e7f9b5 | 80 | { |
1077a574 | 81 | enum isci_completion_selection disposition; |
50e7f9b5 | 82 | |
1077a574 DW |
83 | disposition = isci_perform_normal_io_completion; |
84 | disposition = isci_task_set_completion_status(task, response, status, | |
85 | disposition); | |
50e7f9b5 DW |
86 | |
87 | /* Tasks aborted specifically by a call to the lldd_abort_task | |
1077a574 DW |
88 | * function should not be completed to the host in the regular path. |
89 | */ | |
90 | switch (disposition) { | |
a5ec7f86 JB |
91 | case isci_perform_normal_io_completion: |
92 | /* Normal notification (task_done) */ | |
93 | dev_dbg(&ihost->pdev->dev, | |
94 | "%s: Normal - task = %p, response=%d, " | |
95 | "status=%d\n", | |
96 | __func__, task, response, status); | |
50e7f9b5 | 97 | |
a5ec7f86 | 98 | task->lldd_task = NULL; |
312d3e56 | 99 | task->task_done(task); |
a5ec7f86 | 100 | break; |
50e7f9b5 | 101 | |
a5ec7f86 JB |
102 | case isci_perform_aborted_io_completion: |
103 | /* | |
104 | * No notification because this request is already in the | |
105 | * abort path. | |
106 | */ | |
107 | dev_dbg(&ihost->pdev->dev, | |
108 | "%s: Aborted - task = %p, response=%d, " | |
109 | "status=%d\n", | |
110 | __func__, task, response, status); | |
111 | break; | |
50e7f9b5 | 112 | |
a5ec7f86 JB |
113 | case isci_perform_error_io_completion: |
114 | /* Use sas_task_abort */ | |
115 | dev_dbg(&ihost->pdev->dev, | |
116 | "%s: Error - task = %p, response=%d, " | |
117 | "status=%d\n", | |
118 | __func__, task, response, status); | |
312d3e56 | 119 | sas_task_abort(task); |
a5ec7f86 | 120 | break; |
50e7f9b5 | 121 | |
a5ec7f86 JB |
122 | default: |
123 | dev_dbg(&ihost->pdev->dev, | |
124 | "%s: isci task notification default case!", | |
125 | __func__); | |
126 | sas_task_abort(task); | |
127 | break; | |
50e7f9b5 DW |
128 | } |
129 | } | |
6f231dda | 130 | |
1077a574 DW |
131 | #define for_each_sas_task(num, task) \ |
132 | for (; num > 0; num--,\ | |
133 | task = list_entry(task->list.next, struct sas_task, list)) | |
134 | ||
9274f45e JS |
135 | |
136 | static inline int isci_device_io_ready(struct isci_remote_device *idev, | |
137 | struct sas_task *task) | |
138 | { | |
139 | return idev ? test_bit(IDEV_IO_READY, &idev->flags) || | |
140 | (test_bit(IDEV_IO_NCQERROR, &idev->flags) && | |
141 | isci_task_is_ncq_recovery(task)) | |
142 | : 0; | |
143 | } | |
6f231dda DW |
144 | /** |
145 | * isci_task_execute_task() - This function is one of the SAS Domain Template | |
146 | * functions. This function is called by libsas to send a task down to | |
147 | * hardware. | |
148 | * @task: This parameter specifies the SAS task to send. | |
149 | * @num: This parameter specifies the number of tasks to queue. | |
150 | * @gfp_flags: This parameter specifies the context of this call. | |
151 | * | |
152 | * status, zero indicates success. | |
153 | */ | |
154 | int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags) | |
155 | { | |
4393aa4e | 156 | struct isci_host *ihost = dev_to_ihost(task->dev); |
209fae14 | 157 | struct isci_remote_device *idev; |
6f231dda | 158 | unsigned long flags; |
f2088267 | 159 | bool io_ready; |
312e0c24 | 160 | u16 tag; |
6f231dda | 161 | |
1077a574 | 162 | dev_dbg(&ihost->pdev->dev, "%s: num=%d\n", __func__, num); |
6f231dda | 163 | |
1077a574 | 164 | for_each_sas_task(num, task) { |
312e0c24 DW |
165 | enum sci_status status = SCI_FAILURE; |
166 | ||
209fae14 DW |
167 | spin_lock_irqsave(&ihost->scic_lock, flags); |
168 | idev = isci_lookup_device(task->dev); | |
9274f45e | 169 | io_ready = isci_device_io_ready(idev, task); |
312e0c24 | 170 | tag = isci_alloc_tag(ihost); |
209fae14 | 171 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda | 172 | |
f2088267 DW |
173 | dev_dbg(&ihost->pdev->dev, |
174 | "task: %p, num: %d dev: %p idev: %p:%#lx cmd = %p\n", | |
175 | task, num, task->dev, idev, idev ? idev->flags : 0, | |
176 | task->uldd_task); | |
6f231dda | 177 | |
f2088267 DW |
178 | if (!idev) { |
179 | isci_task_refuse(ihost, task, SAS_TASK_UNDELIVERED, | |
180 | SAS_DEVICE_UNKNOWN); | |
312e0c24 | 181 | } else if (!io_ready || tag == SCI_CONTROLLER_INVALID_IO_TAG) { |
f2088267 DW |
182 | /* Indicate QUEUE_FULL so that the scsi midlayer |
183 | * retries. | |
184 | */ | |
185 | isci_task_refuse(ihost, task, SAS_TASK_COMPLETE, | |
186 | SAS_QUEUE_FULL); | |
f0846c68 JS |
187 | } else { |
188 | /* There is a device and it's ready for I/O. */ | |
189 | spin_lock_irqsave(&task->task_state_lock, flags); | |
6f231dda | 190 | |
f0846c68 | 191 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
f2088267 | 192 | /* The I/O was aborted. */ |
f0846c68 JS |
193 | spin_unlock_irqrestore(&task->task_state_lock, |
194 | flags); | |
6f231dda | 195 | |
1077a574 DW |
196 | isci_task_refuse(ihost, task, |
197 | SAS_TASK_UNDELIVERED, | |
198 | SAM_STAT_TASK_ABORTED); | |
f0846c68 | 199 | } else { |
6f231dda DW |
200 | task->task_state_flags |= SAS_TASK_AT_INITIATOR; |
201 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
f0846c68 JS |
202 | |
203 | /* build and send the request. */ | |
db056250 | 204 | status = isci_request_execute(ihost, idev, task, tag); |
f0846c68 JS |
205 | |
206 | if (status != SCI_SUCCESS) { | |
207 | ||
208 | spin_lock_irqsave(&task->task_state_lock, flags); | |
209 | /* Did not really start this command. */ | |
210 | task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; | |
211 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
212 | ||
c2cb8a5f JS |
213 | if (test_bit(IDEV_GONE, &idev->flags)) { |
214 | ||
215 | /* Indicate that the device | |
216 | * is gone. | |
217 | */ | |
218 | isci_task_refuse(ihost, task, | |
219 | SAS_TASK_UNDELIVERED, | |
220 | SAS_DEVICE_UNKNOWN); | |
221 | } else { | |
222 | /* Indicate QUEUE_FULL so that | |
223 | * the scsi midlayer retries. | |
224 | * If the request failed for | |
225 | * remote device reasons, it | |
226 | * gets returned as | |
227 | * SAS_TASK_UNDELIVERED next | |
228 | * time through. | |
229 | */ | |
230 | isci_task_refuse(ihost, task, | |
231 | SAS_TASK_COMPLETE, | |
232 | SAS_QUEUE_FULL); | |
233 | } | |
f0846c68 | 234 | } |
6f231dda DW |
235 | } |
236 | } | |
312e0c24 DW |
237 | if (status != SCI_SUCCESS && tag != SCI_CONTROLLER_INVALID_IO_TAG) { |
238 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
239 | /* command never hit the device, so just free | |
240 | * the tci and skip the sequence increment | |
241 | */ | |
242 | isci_tci_free(ihost, ISCI_TAG_TCI(tag)); | |
243 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
244 | } | |
209fae14 | 245 | isci_put_device(idev); |
1077a574 | 246 | } |
6f231dda DW |
247 | return 0; |
248 | } | |
249 | ||
16ba7709 DW |
250 | static enum sci_status isci_sata_management_task_request_build(struct isci_request *ireq) |
251 | { | |
252 | struct isci_tmf *isci_tmf; | |
253 | enum sci_status status; | |
254 | ||
3b34c169 | 255 | if (!test_bit(IREQ_TMF, &ireq->flags)) |
16ba7709 DW |
256 | return SCI_FAILURE; |
257 | ||
258 | isci_tmf = isci_request_access_tmf(ireq); | |
259 | ||
260 | switch (isci_tmf->tmf_code) { | |
261 | ||
262 | case isci_tmf_sata_srst_high: | |
263 | case isci_tmf_sata_srst_low: { | |
264 | struct host_to_dev_fis *fis = &ireq->stp.cmd; | |
265 | ||
266 | memset(fis, 0, sizeof(*fis)); | |
267 | ||
268 | fis->fis_type = 0x27; | |
269 | fis->flags &= ~0x80; | |
270 | fis->flags &= 0xF0; | |
271 | if (isci_tmf->tmf_code == isci_tmf_sata_srst_high) | |
272 | fis->control |= ATA_SRST; | |
273 | else | |
274 | fis->control &= ~ATA_SRST; | |
275 | break; | |
276 | } | |
277 | /* other management commnd go here... */ | |
278 | default: | |
279 | return SCI_FAILURE; | |
280 | } | |
281 | ||
282 | /* core builds the protocol specific request | |
283 | * based on the h2d fis. | |
284 | */ | |
285 | status = sci_task_request_construct_sata(ireq); | |
286 | ||
287 | return status; | |
288 | } | |
289 | ||
0d0cf14c | 290 | static struct isci_request *isci_task_request_build(struct isci_host *ihost, |
209fae14 | 291 | struct isci_remote_device *idev, |
312e0c24 | 292 | u16 tag, struct isci_tmf *isci_tmf) |
6f231dda | 293 | { |
6f231dda | 294 | enum sci_status status = SCI_FAILURE; |
0d0cf14c | 295 | struct isci_request *ireq = NULL; |
a1a113b0 | 296 | struct domain_device *dev; |
6f231dda | 297 | |
0d0cf14c | 298 | dev_dbg(&ihost->pdev->dev, |
6f231dda DW |
299 | "%s: isci_tmf = %p\n", __func__, isci_tmf); |
300 | ||
0d0cf14c | 301 | dev = idev->domain_dev; |
6f231dda DW |
302 | |
303 | /* do common allocation and init of request object. */ | |
db056250 | 304 | ireq = isci_tmf_request_from_tag(ihost, isci_tmf, tag); |
0d0cf14c DW |
305 | if (!ireq) |
306 | return NULL; | |
6f231dda DW |
307 | |
308 | /* let the core do it's construct. */ | |
89a7301f | 309 | status = sci_task_request_construct(ihost, idev, tag, |
5076a1a9 | 310 | ireq); |
6f231dda DW |
311 | |
312 | if (status != SCI_SUCCESS) { | |
0d0cf14c | 313 | dev_warn(&ihost->pdev->dev, |
89a7301f | 314 | "%s: sci_task_request_construct failed - " |
6f231dda DW |
315 | "status = 0x%x\n", |
316 | __func__, | |
317 | status); | |
db056250 | 318 | return NULL; |
6f231dda DW |
319 | } |
320 | ||
a1a113b0 DW |
321 | /* XXX convert to get this from task->tproto like other drivers */ |
322 | if (dev->dev_type == SAS_END_DEV) { | |
6f231dda | 323 | isci_tmf->proto = SAS_PROTOCOL_SSP; |
89a7301f | 324 | status = sci_task_request_construct_ssp(ireq); |
6f231dda | 325 | if (status != SCI_SUCCESS) |
db056250 | 326 | return NULL; |
6f231dda DW |
327 | } |
328 | ||
a1a113b0 | 329 | if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { |
6f231dda | 330 | isci_tmf->proto = SAS_PROTOCOL_SATA; |
0d0cf14c | 331 | status = isci_sata_management_task_request_build(ireq); |
6f231dda DW |
332 | |
333 | if (status != SCI_SUCCESS) | |
db056250 | 334 | return NULL; |
6f231dda | 335 | } |
0d0cf14c | 336 | return ireq; |
6f231dda DW |
337 | } |
338 | ||
b343dff1 JS |
339 | /** |
340 | * isci_request_mark_zombie() - This function must be called with scic_lock held. | |
341 | */ | |
342 | static void isci_request_mark_zombie(struct isci_host *ihost, struct isci_request *ireq) | |
343 | { | |
344 | struct completion *tmf_completion = NULL; | |
345 | struct completion *req_completion; | |
346 | ||
347 | /* Set the request state to "dead". */ | |
348 | ireq->status = dead; | |
349 | ||
350 | req_completion = ireq->io_request_completion; | |
351 | ireq->io_request_completion = NULL; | |
352 | ||
3b34c169 | 353 | if (test_bit(IREQ_TMF, &ireq->flags)) { |
b343dff1 JS |
354 | /* Break links with the TMF request. */ |
355 | struct isci_tmf *tmf = isci_request_access_tmf(ireq); | |
356 | ||
357 | /* In the case where a task request is dying, | |
358 | * the thread waiting on the complete will sit and | |
359 | * timeout unless we wake it now. Since the TMF | |
360 | * has a default error status, complete it here | |
361 | * to wake the waiting thread. | |
362 | */ | |
363 | if (tmf) { | |
364 | tmf_completion = tmf->complete; | |
365 | tmf->complete = NULL; | |
366 | } | |
367 | ireq->ttype_ptr.tmf_task_ptr = NULL; | |
368 | dev_dbg(&ihost->pdev->dev, "%s: tmf_code %d, managed tag %#x\n", | |
369 | __func__, tmf->tmf_code, tmf->io_tag); | |
3b34c169 JS |
370 | } else { |
371 | /* Break links with the sas_task - the callback is done | |
372 | * elsewhere. | |
373 | */ | |
374 | struct sas_task *task = isci_request_access_task(ireq); | |
375 | ||
376 | if (task) | |
377 | task->lldd_task = NULL; | |
378 | ||
379 | ireq->ttype_ptr.io_task_ptr = NULL; | |
b343dff1 JS |
380 | } |
381 | ||
382 | dev_warn(&ihost->pdev->dev, "task context unrecoverable (tag: %#x)\n", | |
383 | ireq->io_tag); | |
384 | ||
385 | /* Don't force waiting threads to timeout. */ | |
386 | if (req_completion) | |
387 | complete(req_completion); | |
388 | ||
389 | if (tmf_completion != NULL) | |
390 | complete(tmf_completion); | |
391 | } | |
392 | ||
16ba7709 DW |
393 | static int isci_task_execute_tmf(struct isci_host *ihost, |
394 | struct isci_remote_device *idev, | |
395 | struct isci_tmf *tmf, unsigned long timeout_ms) | |
6f231dda DW |
396 | { |
397 | DECLARE_COMPLETION_ONSTACK(completion); | |
467e855a | 398 | enum sci_task_status status = SCI_TASK_FAILURE; |
0d0cf14c | 399 | struct isci_request *ireq; |
6f231dda DW |
400 | int ret = TMF_RESP_FUNC_FAILED; |
401 | unsigned long flags; | |
fd18388b | 402 | unsigned long timeleft; |
312e0c24 DW |
403 | u16 tag; |
404 | ||
405 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
406 | tag = isci_alloc_tag(ihost); | |
407 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
408 | ||
409 | if (tag == SCI_CONTROLLER_INVALID_IO_TAG) | |
410 | return ret; | |
6f231dda DW |
411 | |
412 | /* sanity check, return TMF_RESP_FUNC_FAILED | |
413 | * if the device is not there and ready. | |
414 | */ | |
78a6f06e DW |
415 | if (!idev || |
416 | (!test_bit(IDEV_IO_READY, &idev->flags) && | |
417 | !test_bit(IDEV_IO_NCQERROR, &idev->flags))) { | |
0d0cf14c | 418 | dev_dbg(&ihost->pdev->dev, |
78a6f06e | 419 | "%s: idev = %p not ready (%#lx)\n", |
6f231dda | 420 | __func__, |
78a6f06e | 421 | idev, idev ? idev->flags : 0); |
312e0c24 | 422 | goto err_tci; |
6f231dda | 423 | } else |
0d0cf14c | 424 | dev_dbg(&ihost->pdev->dev, |
78a6f06e DW |
425 | "%s: idev = %p\n", |
426 | __func__, idev); | |
6f231dda DW |
427 | |
428 | /* Assign the pointer to the TMF's completion kernel wait structure. */ | |
429 | tmf->complete = &completion; | |
b343dff1 | 430 | tmf->status = SCI_FAILURE_TIMEOUT; |
6f231dda | 431 | |
78a6f06e | 432 | ireq = isci_task_request_build(ihost, idev, tag, tmf); |
312e0c24 DW |
433 | if (!ireq) |
434 | goto err_tci; | |
6f231dda | 435 | |
0d0cf14c | 436 | spin_lock_irqsave(&ihost->scic_lock, flags); |
6f231dda DW |
437 | |
438 | /* start the TMF io. */ | |
89a7301f | 439 | status = sci_controller_start_task(ihost, idev, ireq); |
6f231dda | 440 | |
467e855a | 441 | if (status != SCI_TASK_SUCCESS) { |
a8a0a133 | 442 | dev_dbg(&ihost->pdev->dev, |
6f231dda DW |
443 | "%s: start_io failed - status = 0x%x, request = %p\n", |
444 | __func__, | |
445 | status, | |
0d0cf14c DW |
446 | ireq); |
447 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
db056250 | 448 | goto err_tci; |
6f231dda DW |
449 | } |
450 | ||
6f231dda DW |
451 | if (tmf->cb_state_func != NULL) |
452 | tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data); | |
453 | ||
0d0cf14c | 454 | isci_request_change_state(ireq, started); |
6f231dda DW |
455 | |
456 | /* add the request to the remote device request list. */ | |
78a6f06e | 457 | list_add(&ireq->dev_node, &idev->reqs_in_process); |
6f231dda | 458 | |
0d0cf14c | 459 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda DW |
460 | |
461 | /* Wait for the TMF to complete, or a timeout. */ | |
fd18388b | 462 | timeleft = wait_for_completion_timeout(&completion, |
086a0dab | 463 | msecs_to_jiffies(timeout_ms)); |
fd18388b EN |
464 | |
465 | if (timeleft == 0) { | |
b343dff1 JS |
466 | /* The TMF did not complete - this could be because |
467 | * of an unplug. Terminate the TMF request now. | |
468 | */ | |
0d0cf14c | 469 | spin_lock_irqsave(&ihost->scic_lock, flags); |
fd18388b EN |
470 | |
471 | if (tmf->cb_state_func != NULL) | |
b343dff1 JS |
472 | tmf->cb_state_func(isci_tmf_timed_out, tmf, |
473 | tmf->cb_data); | |
fd18388b | 474 | |
b343dff1 | 475 | sci_controller_terminate_request(ihost, idev, ireq); |
fd18388b | 476 | |
0d0cf14c | 477 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
086a0dab | 478 | |
b343dff1 JS |
479 | timeleft = wait_for_completion_timeout( |
480 | &completion, | |
481 | msecs_to_jiffies(ISCI_TERMINATION_TIMEOUT_MSEC)); | |
482 | ||
483 | if (!timeleft) { | |
484 | /* Strange condition - the termination of the TMF | |
485 | * request timed-out. | |
486 | */ | |
487 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
488 | ||
489 | /* If the TMF status has not changed, kill it. */ | |
490 | if (tmf->status == SCI_FAILURE_TIMEOUT) | |
491 | isci_request_mark_zombie(ihost, ireq); | |
492 | ||
493 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
494 | } | |
fd18388b | 495 | } |
6f231dda | 496 | |
27234ab4 | 497 | isci_print_tmf(ihost, tmf); |
6f231dda DW |
498 | |
499 | if (tmf->status == SCI_SUCCESS) | |
500 | ret = TMF_RESP_FUNC_COMPLETE; | |
501 | else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) { | |
0d0cf14c | 502 | dev_dbg(&ihost->pdev->dev, |
6f231dda DW |
503 | "%s: tmf.status == " |
504 | "SCI_FAILURE_IO_RESPONSE_VALID\n", | |
505 | __func__); | |
506 | ret = TMF_RESP_FUNC_COMPLETE; | |
507 | } | |
508 | /* Else - leave the default "failed" status alone. */ | |
509 | ||
0d0cf14c | 510 | dev_dbg(&ihost->pdev->dev, |
6f231dda DW |
511 | "%s: completed request = %p\n", |
512 | __func__, | |
0d0cf14c | 513 | ireq); |
6f231dda | 514 | |
6f231dda | 515 | return ret; |
312e0c24 | 516 | |
312e0c24 DW |
517 | err_tci: |
518 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
519 | isci_tci_free(ihost, ISCI_TAG_TCI(tag)); | |
520 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
521 | ||
522 | return ret; | |
6f231dda DW |
523 | } |
524 | ||
16ba7709 DW |
525 | static void isci_task_build_tmf(struct isci_tmf *tmf, |
526 | enum isci_tmf_function_codes code, | |
527 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
528 | struct isci_tmf *, | |
529 | void *), | |
530 | void *cb_data) | |
6f231dda | 531 | { |
6f231dda DW |
532 | memset(tmf, 0, sizeof(*tmf)); |
533 | ||
6f231dda | 534 | tmf->tmf_code = code; |
6f231dda | 535 | tmf->cb_state_func = tmf_sent_cb; |
c3f42feb JS |
536 | tmf->cb_data = cb_data; |
537 | } | |
1fad9e93 | 538 | |
16ba7709 DW |
539 | static void isci_task_build_abort_task_tmf(struct isci_tmf *tmf, |
540 | enum isci_tmf_function_codes code, | |
541 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
542 | struct isci_tmf *, | |
543 | void *), | |
544 | struct isci_request *old_request) | |
c3f42feb | 545 | { |
16ba7709 | 546 | isci_task_build_tmf(tmf, code, tmf_sent_cb, old_request); |
c3f42feb | 547 | tmf->io_tag = old_request->io_tag; |
6f231dda DW |
548 | } |
549 | ||
6f231dda DW |
550 | /** |
551 | * isci_task_validate_request_to_abort() - This function checks the given I/O | |
552 | * against the "started" state. If the request is still "started", it's | |
553 | * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD | |
554 | * BEFORE CALLING THIS FUNCTION. | |
555 | * @isci_request: This parameter specifies the request object to control. | |
556 | * @isci_host: This parameter specifies the ISCI host object | |
557 | * @isci_device: This is the device to which the request is pending. | |
558 | * @aborted_io_completion: This is a completion structure that will be added to | |
559 | * the request in case it is changed to aborting; this completion is | |
560 | * triggered when the request is fully completed. | |
561 | * | |
562 | * Either "started" on successful change of the task status to "aborted", or | |
563 | * "unallocated" if the task cannot be controlled. | |
564 | */ | |
565 | static enum isci_request_status isci_task_validate_request_to_abort( | |
566 | struct isci_request *isci_request, | |
567 | struct isci_host *isci_host, | |
568 | struct isci_remote_device *isci_device, | |
569 | struct completion *aborted_io_completion) | |
570 | { | |
571 | enum isci_request_status old_state = unallocated; | |
572 | ||
573 | /* Only abort the task if it's in the | |
574 | * device's request_in_process list | |
575 | */ | |
576 | if (isci_request && !list_empty(&isci_request->dev_node)) { | |
577 | old_state = isci_request_change_started_to_aborted( | |
578 | isci_request, aborted_io_completion); | |
579 | ||
6f231dda DW |
580 | } |
581 | ||
582 | return old_state; | |
583 | } | |
584 | ||
d6891682 JS |
585 | static int isci_request_is_dealloc_managed(enum isci_request_status stat) |
586 | { | |
587 | switch (stat) { | |
588 | case aborted: | |
589 | case aborting: | |
590 | case terminating: | |
591 | case completed: | |
592 | case dead: | |
593 | return true; | |
594 | default: | |
595 | return false; | |
596 | } | |
597 | } | |
598 | ||
6f231dda DW |
599 | /** |
600 | * isci_terminate_request_core() - This function will terminate the given | |
601 | * request, and wait for it to complete. This function must only be called | |
602 | * from a thread that can wait. Note that the request is terminated and | |
603 | * completed (back to the host, if started there). | |
d9dcb4ba | 604 | * @ihost: This SCU. |
78a6f06e | 605 | * @idev: The target. |
6f231dda DW |
606 | * @isci_request: The I/O request to be terminated. |
607 | * | |
6f231dda | 608 | */ |
d9dcb4ba DW |
609 | static void isci_terminate_request_core(struct isci_host *ihost, |
610 | struct isci_remote_device *idev, | |
611 | struct isci_request *isci_request) | |
6f231dda | 612 | { |
cbb65c66 | 613 | enum sci_status status = SCI_SUCCESS; |
6f231dda DW |
614 | bool was_terminated = false; |
615 | bool needs_cleanup_handling = false; | |
77c852f3 JS |
616 | unsigned long flags; |
617 | unsigned long termination_completed = 1; | |
618 | struct completion *io_request_completion; | |
6f231dda | 619 | |
d9dcb4ba | 620 | dev_dbg(&ihost->pdev->dev, |
6f231dda | 621 | "%s: device = %p; request = %p\n", |
78a6f06e | 622 | __func__, idev, isci_request); |
6f231dda | 623 | |
d9dcb4ba | 624 | spin_lock_irqsave(&ihost->scic_lock, flags); |
4dc043c4 | 625 | |
77c852f3 JS |
626 | io_request_completion = isci_request->io_request_completion; |
627 | ||
4dc043c4 | 628 | /* Note that we are not going to control |
38d8879b DW |
629 | * the target to abort the request. |
630 | */ | |
631 | set_bit(IREQ_COMPLETE_IN_TARGET, &isci_request->flags); | |
4dc043c4 | 632 | |
6f231dda DW |
633 | /* Make sure the request wasn't just sitting around signalling |
634 | * device condition (if the request handle is NULL, then the | |
635 | * request completed but needed additional handling here). | |
636 | */ | |
38d8879b | 637 | if (!test_bit(IREQ_TERMINATED, &isci_request->flags)) { |
6f231dda | 638 | was_terminated = true; |
cbb65c66 | 639 | needs_cleanup_handling = true; |
89a7301f | 640 | status = sci_controller_terminate_request(ihost, |
d9dcb4ba DW |
641 | idev, |
642 | isci_request); | |
6f231dda | 643 | } |
d9dcb4ba | 644 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda DW |
645 | |
646 | /* | |
647 | * The only time the request to terminate will | |
648 | * fail is when the io request is completed and | |
649 | * being aborted. | |
650 | */ | |
4dc043c4 | 651 | if (status != SCI_SUCCESS) { |
a8a0a133 | 652 | dev_dbg(&ihost->pdev->dev, |
89a7301f | 653 | "%s: sci_controller_terminate_request" |
6f231dda | 654 | " returned = 0x%x\n", |
77c852f3 JS |
655 | __func__, status); |
656 | ||
4dc043c4 JS |
657 | isci_request->io_request_completion = NULL; |
658 | ||
659 | } else { | |
6f231dda | 660 | if (was_terminated) { |
d9dcb4ba | 661 | dev_dbg(&ihost->pdev->dev, |
77c852f3 JS |
662 | "%s: before completion wait (%p/%p)\n", |
663 | __func__, isci_request, io_request_completion); | |
6f231dda DW |
664 | |
665 | /* Wait here for the request to complete. */ | |
77c852f3 | 666 | termination_completed |
4dc043c4 | 667 | = wait_for_completion_timeout( |
77c852f3 | 668 | io_request_completion, |
b343dff1 | 669 | msecs_to_jiffies(ISCI_TERMINATION_TIMEOUT_MSEC)); |
4dc043c4 | 670 | |
77c852f3 JS |
671 | if (!termination_completed) { |
672 | ||
673 | /* The request to terminate has timed out. */ | |
b343dff1 | 674 | spin_lock_irqsave(&ihost->scic_lock, flags); |
77c852f3 JS |
675 | |
676 | /* Check for state changes. */ | |
b343dff1 JS |
677 | if (!test_bit(IREQ_TERMINATED, |
678 | &isci_request->flags)) { | |
77c852f3 JS |
679 | |
680 | /* The best we can do is to have the | |
681 | * request die a silent death if it | |
682 | * ever really completes. | |
77c852f3 | 683 | */ |
b343dff1 JS |
684 | isci_request_mark_zombie(ihost, |
685 | isci_request); | |
686 | needs_cleanup_handling = true; | |
77c852f3 JS |
687 | } else |
688 | termination_completed = 1; | |
689 | ||
d9dcb4ba | 690 | spin_unlock_irqrestore(&ihost->scic_lock, |
77c852f3 | 691 | flags); |
4dc043c4 | 692 | |
77c852f3 | 693 | if (!termination_completed) { |
4dc043c4 | 694 | |
a8a0a133 | 695 | dev_dbg(&ihost->pdev->dev, |
77c852f3 JS |
696 | "%s: *** Timeout waiting for " |
697 | "termination(%p/%p)\n", | |
698 | __func__, io_request_completion, | |
699 | isci_request); | |
4dc043c4 | 700 | |
77c852f3 JS |
701 | /* The request can no longer be referenced |
702 | * safely since it may go away if the | |
703 | * termination every really does complete. | |
704 | */ | |
705 | isci_request = NULL; | |
706 | } | |
707 | } | |
708 | if (termination_completed) | |
d9dcb4ba | 709 | dev_dbg(&ihost->pdev->dev, |
77c852f3 JS |
710 | "%s: after completion wait (%p/%p)\n", |
711 | __func__, isci_request, io_request_completion); | |
4dc043c4 | 712 | } |
4dc043c4 | 713 | |
77c852f3 | 714 | if (termination_completed) { |
cbb65c66 | 715 | |
77c852f3 | 716 | isci_request->io_request_completion = NULL; |
6f231dda | 717 | |
77c852f3 JS |
718 | /* Peek at the status of the request. This will tell |
719 | * us if there was special handling on the request such that it | |
720 | * needs to be detached and freed here. | |
721 | */ | |
722 | spin_lock_irqsave(&isci_request->state_lock, flags); | |
d6891682 JS |
723 | |
724 | needs_cleanup_handling | |
725 | = isci_request_is_dealloc_managed( | |
726 | isci_request->status); | |
727 | ||
77c852f3 | 728 | spin_unlock_irqrestore(&isci_request->state_lock, flags); |
6f231dda | 729 | |
77c852f3 | 730 | } |
db49c2d0 JS |
731 | if (needs_cleanup_handling) { |
732 | ||
733 | dev_dbg(&ihost->pdev->dev, | |
734 | "%s: cleanup isci_device=%p, request=%p\n", | |
735 | __func__, idev, isci_request); | |
736 | ||
737 | if (isci_request != NULL) { | |
738 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
739 | isci_free_tag(ihost, isci_request->io_tag); | |
740 | isci_request_change_state(isci_request, unallocated); | |
741 | list_del_init(&isci_request->dev_node); | |
742 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
743 | } | |
744 | } | |
a5fde225 | 745 | } |
6f231dda DW |
746 | } |
747 | ||
748 | /** | |
749 | * isci_terminate_pending_requests() - This function will change the all of the | |
750 | * requests on the given device's state to "aborting", will terminate the | |
751 | * requests, and wait for them to complete. This function must only be | |
752 | * called from a thread that can wait. Note that the requests are all | |
753 | * terminated and completed (back to the host, if started there). | |
754 | * @isci_host: This parameter specifies SCU. | |
78a6f06e | 755 | * @idev: This parameter specifies the target. |
6f231dda | 756 | * |
6f231dda | 757 | */ |
980d3aeb DW |
758 | void isci_terminate_pending_requests(struct isci_host *ihost, |
759 | struct isci_remote_device *idev) | |
6f231dda | 760 | { |
980d3aeb | 761 | struct completion request_completion; |
77c852f3 | 762 | enum isci_request_status old_state; |
980d3aeb DW |
763 | unsigned long flags; |
764 | LIST_HEAD(list); | |
6f231dda | 765 | |
980d3aeb DW |
766 | spin_lock_irqsave(&ihost->scic_lock, flags); |
767 | list_splice_init(&idev->reqs_in_process, &list); | |
6f231dda | 768 | |
980d3aeb DW |
769 | /* assumes that isci_terminate_request_core deletes from the list */ |
770 | while (!list_empty(&list)) { | |
771 | struct isci_request *ireq = list_entry(list.next, typeof(*ireq), dev_node); | |
6f231dda | 772 | |
980d3aeb DW |
773 | /* Change state to "terminating" if it is currently |
774 | * "started". | |
775 | */ | |
776 | old_state = isci_request_change_started_to_newstate(ireq, | |
777 | &request_completion, | |
778 | terminating); | |
779 | switch (old_state) { | |
780 | case started: | |
781 | case completed: | |
782 | case aborting: | |
783 | break; | |
784 | default: | |
785 | /* termination in progress, or otherwise dispositioned. | |
786 | * We know the request was on 'list' so should be safe | |
787 | * to move it back to reqs_in_process | |
788 | */ | |
789 | list_move(&ireq->dev_node, &idev->reqs_in_process); | |
790 | ireq = NULL; | |
791 | break; | |
792 | } | |
4dc043c4 | 793 | |
980d3aeb DW |
794 | if (!ireq) |
795 | continue; | |
796 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
77c852f3 | 797 | |
980d3aeb | 798 | init_completion(&request_completion); |
77c852f3 | 799 | |
980d3aeb DW |
800 | dev_dbg(&ihost->pdev->dev, |
801 | "%s: idev=%p request=%p; task=%p old_state=%d\n", | |
802 | __func__, idev, ireq, | |
3b34c169 JS |
803 | (!test_bit(IREQ_TMF, &ireq->flags) |
804 | ? isci_request_access_task(ireq) | |
805 | : NULL), | |
980d3aeb DW |
806 | old_state); |
807 | ||
808 | /* If the old_state is started: | |
809 | * This request was not already being aborted. If it had been, | |
810 | * then the aborting I/O (ie. the TMF request) would not be in | |
811 | * the aborting state, and thus would be terminated here. Note | |
812 | * that since the TMF completion's call to the kernel function | |
813 | * "complete()" does not happen until the pending I/O request | |
814 | * terminate fully completes, we do not have to implement a | |
815 | * special wait here for already aborting requests - the | |
816 | * termination of the TMF request will force the request | |
817 | * to finish it's already started terminate. | |
818 | * | |
819 | * If old_state == completed: | |
820 | * This request completed from the SCU hardware perspective | |
821 | * and now just needs cleaning up in terms of freeing the | |
822 | * request and potentially calling up to libsas. | |
823 | * | |
824 | * If old_state == aborting: | |
825 | * This request has already gone through a TMF timeout, but may | |
826 | * not have been terminated; needs cleaning up at least. | |
827 | */ | |
828 | isci_terminate_request_core(ihost, idev, ireq); | |
829 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
4dc043c4 | 830 | } |
980d3aeb | 831 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda DW |
832 | } |
833 | ||
834 | /** | |
835 | * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain | |
836 | * Template functions. | |
837 | * @lun: This parameter specifies the lun to be reset. | |
838 | * | |
839 | * status, zero indicates success. | |
840 | */ | |
841 | static int isci_task_send_lu_reset_sas( | |
842 | struct isci_host *isci_host, | |
843 | struct isci_remote_device *isci_device, | |
844 | u8 *lun) | |
845 | { | |
846 | struct isci_tmf tmf; | |
847 | int ret = TMF_RESP_FUNC_FAILED; | |
848 | ||
849 | dev_dbg(&isci_host->pdev->dev, | |
850 | "%s: isci_host = %p, isci_device = %p\n", | |
851 | __func__, isci_host, isci_device); | |
852 | /* Send the LUN reset to the target. By the time the call returns, | |
853 | * the TMF has fully exected in the target (in which case the return | |
854 | * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or | |
855 | * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED"). | |
856 | */ | |
209fae14 | 857 | isci_task_build_tmf(&tmf, isci_tmf_ssp_lun_reset, NULL, NULL); |
6f231dda DW |
858 | |
859 | #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */ | |
209fae14 | 860 | ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, ISCI_LU_RESET_TIMEOUT_MS); |
6f231dda DW |
861 | |
862 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
863 | dev_dbg(&isci_host->pdev->dev, | |
864 | "%s: %p: TMF_LU_RESET passed\n", | |
865 | __func__, isci_device); | |
866 | else | |
867 | dev_dbg(&isci_host->pdev->dev, | |
868 | "%s: %p: TMF_LU_RESET failed (%x)\n", | |
869 | __func__, isci_device, ret); | |
870 | ||
871 | return ret; | |
872 | } | |
873 | ||
16ba7709 DW |
874 | static int isci_task_send_lu_reset_sata(struct isci_host *ihost, |
875 | struct isci_remote_device *idev, u8 *lun) | |
876 | { | |
877 | int ret = TMF_RESP_FUNC_FAILED; | |
878 | struct isci_tmf tmf; | |
879 | ||
880 | /* Send the soft reset to the target */ | |
881 | #define ISCI_SRST_TIMEOUT_MS 25000 /* 25 second timeout. */ | |
882 | isci_task_build_tmf(&tmf, isci_tmf_sata_srst_high, NULL, NULL); | |
883 | ||
884 | ret = isci_task_execute_tmf(ihost, idev, &tmf, ISCI_SRST_TIMEOUT_MS); | |
885 | ||
886 | if (ret != TMF_RESP_FUNC_COMPLETE) { | |
a8a0a133 | 887 | dev_dbg(&ihost->pdev->dev, |
16ba7709 DW |
888 | "%s: Assert SRST failed (%p) = %x", |
889 | __func__, idev, ret); | |
890 | ||
891 | /* Return the failure so that the LUN reset is escalated | |
892 | * to a target reset. | |
893 | */ | |
894 | } | |
895 | return ret; | |
896 | } | |
897 | ||
6f231dda DW |
898 | /** |
899 | * isci_task_lu_reset() - This function is one of the SAS Domain Template | |
900 | * functions. This is one of the Task Management functoins called by libsas, | |
901 | * to reset the given lun. Note the assumption that while this call is | |
902 | * executing, no I/O will be sent by the host to the device. | |
903 | * @lun: This parameter specifies the lun to be reset. | |
904 | * | |
905 | * status, zero indicates success. | |
906 | */ | |
4393aa4e | 907 | int isci_task_lu_reset(struct domain_device *domain_device, u8 *lun) |
6f231dda | 908 | { |
4393aa4e | 909 | struct isci_host *isci_host = dev_to_ihost(domain_device); |
209fae14 DW |
910 | struct isci_remote_device *isci_device; |
911 | unsigned long flags; | |
6f231dda | 912 | int ret; |
6f231dda | 913 | |
209fae14 DW |
914 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
915 | isci_device = isci_lookup_device(domain_device); | |
916 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
6f231dda | 917 | |
4393aa4e DW |
918 | dev_dbg(&isci_host->pdev->dev, |
919 | "%s: domain_device=%p, isci_host=%p; isci_device=%p\n", | |
6f231dda DW |
920 | __func__, domain_device, isci_host, isci_device); |
921 | ||
98145cb7 JS |
922 | if (!isci_device) { |
923 | /* If the device is gone, stop the escalations. */ | |
924 | dev_dbg(&isci_host->pdev->dev, "%s: No dev\n", __func__); | |
6f231dda | 925 | |
98145cb7 | 926 | ret = TMF_RESP_FUNC_COMPLETE; |
209fae14 | 927 | goto out; |
6f231dda | 928 | } |
98145cb7 | 929 | set_bit(IDEV_EH, &isci_device->flags); |
6f231dda | 930 | |
6f231dda DW |
931 | /* Send the task management part of the reset. */ |
932 | if (sas_protocol_ata(domain_device->tproto)) { | |
4393aa4e | 933 | ret = isci_task_send_lu_reset_sata(isci_host, isci_device, lun); |
6f231dda DW |
934 | } else |
935 | ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun); | |
936 | ||
937 | /* If the LUN reset worked, all the I/O can now be terminated. */ | |
938 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
939 | /* Terminate all I/O now. */ | |
940 | isci_terminate_pending_requests(isci_host, | |
980d3aeb | 941 | isci_device); |
6f231dda | 942 | |
209fae14 DW |
943 | out: |
944 | isci_put_device(isci_device); | |
6f231dda DW |
945 | return ret; |
946 | } | |
947 | ||
948 | ||
949 | /* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */ | |
950 | int isci_task_clear_nexus_port(struct asd_sas_port *port) | |
951 | { | |
952 | return TMF_RESP_FUNC_FAILED; | |
953 | } | |
954 | ||
955 | ||
956 | ||
957 | int isci_task_clear_nexus_ha(struct sas_ha_struct *ha) | |
958 | { | |
959 | return TMF_RESP_FUNC_FAILED; | |
960 | } | |
961 | ||
6f231dda DW |
962 | /* Task Management Functions. Must be called from process context. */ |
963 | ||
964 | /** | |
965 | * isci_abort_task_process_cb() - This is a helper function for the abort task | |
966 | * TMF command. It manages the request state with respect to the successful | |
967 | * transmission / completion of the abort task request. | |
968 | * @cb_state: This parameter specifies when this function was called - after | |
969 | * the TMF request has been started and after it has timed-out. | |
970 | * @tmf: This parameter specifies the TMF in progress. | |
971 | * | |
972 | * | |
973 | */ | |
974 | static void isci_abort_task_process_cb( | |
975 | enum isci_tmf_cb_state cb_state, | |
976 | struct isci_tmf *tmf, | |
977 | void *cb_data) | |
978 | { | |
979 | struct isci_request *old_request; | |
980 | ||
981 | old_request = (struct isci_request *)cb_data; | |
982 | ||
983 | dev_dbg(&old_request->isci_host->pdev->dev, | |
984 | "%s: tmf=%p, old_request=%p\n", | |
985 | __func__, tmf, old_request); | |
986 | ||
987 | switch (cb_state) { | |
988 | ||
989 | case isci_tmf_started: | |
990 | /* The TMF has been started. Nothing to do here, since the | |
991 | * request state was already set to "aborted" by the abort | |
992 | * task function. | |
993 | */ | |
6cb4d6b3 BB |
994 | if ((old_request->status != aborted) |
995 | && (old_request->status != completed)) | |
a8a0a133 | 996 | dev_dbg(&old_request->isci_host->pdev->dev, |
6cb4d6b3 BB |
997 | "%s: Bad request status (%d): tmf=%p, old_request=%p\n", |
998 | __func__, old_request->status, tmf, old_request); | |
6f231dda DW |
999 | break; |
1000 | ||
1001 | case isci_tmf_timed_out: | |
1002 | ||
1003 | /* Set the task's state to "aborting", since the abort task | |
1004 | * function thread set it to "aborted" (above) in anticipation | |
1005 | * of the task management request working correctly. Since the | |
1006 | * timeout has now fired, the TMF request failed. We set the | |
1007 | * state such that the request completion will indicate the | |
1008 | * device is no longer present. | |
1009 | */ | |
1010 | isci_request_change_state(old_request, aborting); | |
1011 | break; | |
1012 | ||
1013 | default: | |
a8a0a133 | 1014 | dev_dbg(&old_request->isci_host->pdev->dev, |
6f231dda DW |
1015 | "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n", |
1016 | __func__, cb_state, tmf, old_request); | |
1017 | break; | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | /** | |
1022 | * isci_task_abort_task() - This function is one of the SAS Domain Template | |
1023 | * functions. This function is called by libsas to abort a specified task. | |
1024 | * @task: This parameter specifies the SAS task to abort. | |
1025 | * | |
1026 | * status, zero indicates success. | |
1027 | */ | |
1028 | int isci_task_abort_task(struct sas_task *task) | |
1029 | { | |
4393aa4e | 1030 | struct isci_host *isci_host = dev_to_ihost(task->dev); |
6f231dda | 1031 | DECLARE_COMPLETION_ONSTACK(aborted_io_completion); |
a5fde225 JS |
1032 | struct isci_request *old_request = NULL; |
1033 | enum isci_request_status old_state; | |
6f231dda | 1034 | struct isci_remote_device *isci_device = NULL; |
a5fde225 JS |
1035 | struct isci_tmf tmf; |
1036 | int ret = TMF_RESP_FUNC_FAILED; | |
1037 | unsigned long flags; | |
98145cb7 | 1038 | int perform_termination = 0; |
6f231dda DW |
1039 | |
1040 | /* Get the isci_request reference from the task. Note that | |
1041 | * this check does not depend on the pending request list | |
1042 | * in the device, because tasks driving resets may land here | |
1043 | * after completion in the core. | |
1044 | */ | |
209fae14 DW |
1045 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
1046 | spin_lock(&task->task_state_lock); | |
1047 | ||
1048 | old_request = task->lldd_task; | |
1049 | ||
1050 | /* If task is already done, the request isn't valid */ | |
1051 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE) && | |
1052 | (task->task_state_flags & SAS_TASK_AT_INITIATOR) && | |
1053 | old_request) | |
1054 | isci_device = isci_lookup_device(task->dev); | |
1055 | ||
1056 | spin_unlock(&task->task_state_lock); | |
1057 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
6f231dda DW |
1058 | |
1059 | dev_dbg(&isci_host->pdev->dev, | |
98145cb7 JS |
1060 | "%s: dev = %p, task = %p, old_request == %p\n", |
1061 | __func__, isci_device, task, old_request); | |
6f231dda | 1062 | |
98145cb7 JS |
1063 | if (isci_device) |
1064 | set_bit(IDEV_EH, &isci_device->flags); | |
6f231dda | 1065 | |
98145cb7 JS |
1066 | /* Device reset conditions signalled in task_state_flags are the |
1067 | * responsbility of libsas to observe at the start of the error | |
1068 | * handler thread. | |
6f231dda | 1069 | */ |
98145cb7 JS |
1070 | if (!isci_device || !old_request) { |
1071 | /* The request has already completed and there | |
1072 | * is nothing to do here other than to set the task | |
1073 | * done bit, and indicate that the task abort function | |
1074 | * was sucessful. | |
1075 | */ | |
1076 | spin_lock_irqsave(&task->task_state_lock, flags); | |
1077 | task->task_state_flags |= SAS_TASK_STATE_DONE; | |
1078 | task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR | | |
1079 | SAS_TASK_STATE_PENDING); | |
1080 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
6f231dda | 1081 | |
98145cb7 | 1082 | ret = TMF_RESP_FUNC_COMPLETE; |
6f231dda | 1083 | |
98145cb7 JS |
1084 | dev_dbg(&isci_host->pdev->dev, |
1085 | "%s: abort task not needed for %p\n", | |
1086 | __func__, task); | |
209fae14 | 1087 | goto out; |
a5ec7f86 | 1088 | } |
6f231dda DW |
1089 | |
1090 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
1091 | ||
f219f010 | 1092 | /* Check the request status and change to "aborted" if currently |
a5fde225 | 1093 | * "starting"; if true then set the I/O kernel completion |
6f231dda DW |
1094 | * struct that will be triggered when the request completes. |
1095 | */ | |
a5fde225 JS |
1096 | old_state = isci_task_validate_request_to_abort( |
1097 | old_request, isci_host, isci_device, | |
1098 | &aborted_io_completion); | |
f219f010 JS |
1099 | if ((old_state != started) && |
1100 | (old_state != completed) && | |
1101 | (old_state != aborting)) { | |
6f231dda DW |
1102 | |
1103 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1104 | ||
a5fde225 JS |
1105 | /* The request was already being handled by someone else (because |
1106 | * they got to set the state away from started). | |
1107 | */ | |
1108 | dev_dbg(&isci_host->pdev->dev, | |
1109 | "%s: device = %p; old_request %p already being aborted\n", | |
1110 | __func__, | |
1111 | isci_device, old_request); | |
209fae14 DW |
1112 | ret = TMF_RESP_FUNC_COMPLETE; |
1113 | goto out; | |
6f231dda | 1114 | } |
38d8879b | 1115 | if (task->task_proto == SAS_PROTOCOL_SMP || |
98145cb7 | 1116 | sas_protocol_ata(task->task_proto) || |
38d8879b | 1117 | test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags)) { |
6f231dda DW |
1118 | |
1119 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1120 | ||
a5fde225 | 1121 | dev_dbg(&isci_host->pdev->dev, |
98145cb7 | 1122 | "%s: %s request" |
a5fde225 | 1123 | " or complete_in_target (%d), thus no TMF\n", |
98145cb7 JS |
1124 | __func__, |
1125 | ((task->task_proto == SAS_PROTOCOL_SMP) | |
1126 | ? "SMP" | |
1127 | : (sas_protocol_ata(task->task_proto) | |
1128 | ? "SATA/STP" | |
1129 | : "<other>") | |
1130 | ), | |
38d8879b | 1131 | test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags)); |
a5fde225 | 1132 | |
98145cb7 JS |
1133 | if (test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags)) { |
1134 | spin_lock_irqsave(&task->task_state_lock, flags); | |
1135 | task->task_state_flags |= SAS_TASK_STATE_DONE; | |
1136 | task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR | | |
1137 | SAS_TASK_STATE_PENDING); | |
1138 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1139 | ret = TMF_RESP_FUNC_COMPLETE; | |
1140 | } else { | |
1141 | spin_lock_irqsave(&task->task_state_lock, flags); | |
1142 | task->task_state_flags &= ~(SAS_TASK_AT_INITIATOR | | |
1143 | SAS_TASK_STATE_PENDING); | |
1144 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1145 | } | |
6f231dda | 1146 | |
98145cb7 JS |
1147 | /* STP and SMP devices are not sent a TMF, but the |
1148 | * outstanding I/O request is terminated below. This is | |
1149 | * because SATA/STP and SMP discovery path timeouts directly | |
1150 | * call the abort task interface for cleanup. | |
6f231dda | 1151 | */ |
98145cb7 JS |
1152 | perform_termination = 1; |
1153 | ||
6f231dda DW |
1154 | } else { |
1155 | /* Fill in the tmf stucture */ | |
209fae14 | 1156 | isci_task_build_abort_task_tmf(&tmf, isci_tmf_ssp_task_abort, |
c3f42feb JS |
1157 | isci_abort_task_process_cb, |
1158 | old_request); | |
6f231dda | 1159 | |
6f231dda DW |
1160 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
1161 | ||
98145cb7 | 1162 | #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* 1/2 second timeout */ |
209fae14 | 1163 | ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, |
6f231dda DW |
1164 | ISCI_ABORT_TASK_TIMEOUT_MS); |
1165 | ||
98145cb7 JS |
1166 | if (ret == TMF_RESP_FUNC_COMPLETE) |
1167 | perform_termination = 1; | |
1168 | else | |
a8a0a133 | 1169 | dev_dbg(&isci_host->pdev->dev, |
98145cb7 | 1170 | "%s: isci_task_send_tmf failed\n", __func__); |
6f231dda | 1171 | } |
98145cb7 | 1172 | if (perform_termination) { |
38d8879b | 1173 | set_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags); |
a5fde225 | 1174 | |
77c852f3 JS |
1175 | /* Clean up the request on our side, and wait for the aborted |
1176 | * I/O to complete. | |
1177 | */ | |
98145cb7 JS |
1178 | isci_terminate_request_core(isci_host, isci_device, |
1179 | old_request); | |
a5fde225 | 1180 | } |
6f231dda | 1181 | |
a5fde225 JS |
1182 | /* Make sure we do not leave a reference to aborted_io_completion */ |
1183 | old_request->io_request_completion = NULL; | |
209fae14 DW |
1184 | out: |
1185 | isci_put_device(isci_device); | |
6f231dda DW |
1186 | return ret; |
1187 | } | |
1188 | ||
1189 | /** | |
1190 | * isci_task_abort_task_set() - This function is one of the SAS Domain Template | |
1191 | * functions. This is one of the Task Management functoins called by libsas, | |
1192 | * to abort all task for the given lun. | |
1193 | * @d_device: This parameter specifies the domain device associated with this | |
1194 | * request. | |
1195 | * @lun: This parameter specifies the lun associated with this request. | |
1196 | * | |
1197 | * status, zero indicates success. | |
1198 | */ | |
1199 | int isci_task_abort_task_set( | |
1200 | struct domain_device *d_device, | |
1201 | u8 *lun) | |
1202 | { | |
1203 | return TMF_RESP_FUNC_FAILED; | |
1204 | } | |
1205 | ||
1206 | ||
1207 | /** | |
1208 | * isci_task_clear_aca() - This function is one of the SAS Domain Template | |
1209 | * functions. This is one of the Task Management functoins called by libsas. | |
1210 | * @d_device: This parameter specifies the domain device associated with this | |
1211 | * request. | |
1212 | * @lun: This parameter specifies the lun associated with this request. | |
1213 | * | |
1214 | * status, zero indicates success. | |
1215 | */ | |
1216 | int isci_task_clear_aca( | |
1217 | struct domain_device *d_device, | |
1218 | u8 *lun) | |
1219 | { | |
1220 | return TMF_RESP_FUNC_FAILED; | |
1221 | } | |
1222 | ||
1223 | ||
1224 | ||
1225 | /** | |
1226 | * isci_task_clear_task_set() - This function is one of the SAS Domain Template | |
1227 | * functions. This is one of the Task Management functoins called by libsas. | |
1228 | * @d_device: This parameter specifies the domain device associated with this | |
1229 | * request. | |
1230 | * @lun: This parameter specifies the lun associated with this request. | |
1231 | * | |
1232 | * status, zero indicates success. | |
1233 | */ | |
1234 | int isci_task_clear_task_set( | |
1235 | struct domain_device *d_device, | |
1236 | u8 *lun) | |
1237 | { | |
1238 | return TMF_RESP_FUNC_FAILED; | |
1239 | } | |
1240 | ||
1241 | ||
1242 | /** | |
1243 | * isci_task_query_task() - This function is implemented to cause libsas to | |
1244 | * correctly escalate the failed abort to a LUN or target reset (this is | |
1245 | * because sas_scsi_find_task libsas function does not correctly interpret | |
1246 | * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is | |
1247 | * returned, libsas turns this into a LUN reset; when FUNC_FAILED is | |
1248 | * returned, libsas will turn this into a target reset | |
1249 | * @task: This parameter specifies the sas task being queried. | |
1250 | * @lun: This parameter specifies the lun associated with this request. | |
1251 | * | |
1252 | * status, zero indicates success. | |
1253 | */ | |
1254 | int isci_task_query_task( | |
1255 | struct sas_task *task) | |
1256 | { | |
1257 | /* See if there is a pending device reset for this device. */ | |
1258 | if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) | |
1259 | return TMF_RESP_FUNC_FAILED; | |
1260 | else | |
1261 | return TMF_RESP_FUNC_SUCC; | |
1262 | } | |
1263 | ||
af5ae893 | 1264 | /* |
6f231dda DW |
1265 | * isci_task_request_complete() - This function is called by the sci core when |
1266 | * an task request completes. | |
af5ae893 DJ |
1267 | * @ihost: This parameter specifies the ISCI host object |
1268 | * @ireq: This parameter is the completed isci_request object. | |
6f231dda DW |
1269 | * @completion_status: This parameter specifies the completion status from the |
1270 | * sci core. | |
1271 | * | |
1272 | * none. | |
1273 | */ | |
af5ae893 DJ |
1274 | void |
1275 | isci_task_request_complete(struct isci_host *ihost, | |
1276 | struct isci_request *ireq, | |
1277 | enum sci_task_status completion_status) | |
6f231dda | 1278 | { |
af5ae893 | 1279 | struct isci_tmf *tmf = isci_request_access_tmf(ireq); |
b343dff1 JS |
1280 | struct completion *tmf_complete = NULL; |
1281 | struct completion *request_complete = ireq->io_request_completion; | |
6f231dda | 1282 | |
af5ae893 | 1283 | dev_dbg(&ihost->pdev->dev, |
6f231dda | 1284 | "%s: request = %p, status=%d\n", |
af5ae893 | 1285 | __func__, ireq, completion_status); |
6f231dda | 1286 | |
8d2c65c0 | 1287 | isci_request_change_state(ireq, completed); |
6f231dda | 1288 | |
38d8879b | 1289 | set_bit(IREQ_COMPLETE_IN_TARGET, &ireq->flags); |
6f231dda | 1290 | |
b343dff1 JS |
1291 | if (tmf) { |
1292 | tmf->status = completion_status; | |
1293 | ||
1294 | if (tmf->proto == SAS_PROTOCOL_SSP) { | |
1295 | memcpy(&tmf->resp.resp_iu, | |
1296 | &ireq->ssp.rsp, | |
1297 | SSP_RESP_IU_MAX_SIZE); | |
1298 | } else if (tmf->proto == SAS_PROTOCOL_SATA) { | |
1299 | memcpy(&tmf->resp.d2h_fis, | |
1300 | &ireq->stp.rsp, | |
1301 | sizeof(struct dev_to_host_fis)); | |
1302 | } | |
1303 | /* PRINT_TMF( ((struct isci_tmf *)request->task)); */ | |
1304 | tmf_complete = tmf->complete; | |
6f231dda | 1305 | } |
89a7301f | 1306 | sci_controller_complete_io(ihost, ireq->target_device, ireq); |
67ea838d | 1307 | /* set the 'terminated' flag handle to make sure it cannot be terminated |
6f231dda DW |
1308 | * or completed again. |
1309 | */ | |
38d8879b | 1310 | set_bit(IREQ_TERMINATED, &ireq->flags); |
6f231dda | 1311 | |
d6891682 JS |
1312 | /* As soon as something is in the terminate path, deallocation is |
1313 | * managed there. Note that the final non-managed state of a task | |
1314 | * request is "completed". | |
1315 | */ | |
1316 | if ((ireq->status == completed) || | |
1317 | !isci_request_is_dealloc_managed(ireq->status)) { | |
1318 | isci_request_change_state(ireq, unallocated); | |
1319 | isci_free_tag(ihost, ireq->io_tag); | |
1320 | list_del_init(&ireq->dev_node); | |
1321 | } | |
6f231dda | 1322 | |
b343dff1 JS |
1323 | /* "request_complete" is set if the task was being terminated. */ |
1324 | if (request_complete) | |
1325 | complete(request_complete); | |
1326 | ||
6f231dda | 1327 | /* The task management part completes last. */ |
b343dff1 JS |
1328 | if (tmf_complete) |
1329 | complete(tmf_complete); | |
6f231dda DW |
1330 | } |
1331 | ||
209fae14 | 1332 | static int isci_reset_device(struct isci_host *ihost, |
bc6f387d | 1333 | struct isci_remote_device *idev) |
6f231dda | 1334 | { |
209fae14 | 1335 | struct sas_phy *phy = sas_find_local_phy(idev->domain_dev); |
6f231dda | 1336 | enum sci_status status; |
d06b487b DW |
1337 | unsigned long flags; |
1338 | int rc; | |
6f231dda | 1339 | |
d06b487b | 1340 | dev_dbg(&ihost->pdev->dev, "%s: idev %p\n", __func__, idev); |
6f231dda | 1341 | |
d06b487b | 1342 | spin_lock_irqsave(&ihost->scic_lock, flags); |
89a7301f | 1343 | status = sci_remote_device_reset(idev); |
6f231dda | 1344 | if (status != SCI_SUCCESS) { |
d06b487b | 1345 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda | 1346 | |
a8a0a133 | 1347 | dev_dbg(&ihost->pdev->dev, |
89a7301f | 1348 | "%s: sci_remote_device_reset(%p) returned %d!\n", |
d06b487b | 1349 | __func__, idev, status); |
6f231dda DW |
1350 | |
1351 | return TMF_RESP_FUNC_FAILED; | |
1352 | } | |
d06b487b | 1353 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda | 1354 | |
bc6f387d | 1355 | rc = sas_phy_reset(phy, true); |
6f231dda | 1356 | |
d06b487b DW |
1357 | /* Terminate in-progress I/O now. */ |
1358 | isci_remote_device_nuke_requests(ihost, idev); | |
6f231dda | 1359 | |
ff717ab0 | 1360 | /* Since all pending TCs have been cleaned, resume the RNC. */ |
d06b487b | 1361 | spin_lock_irqsave(&ihost->scic_lock, flags); |
89a7301f | 1362 | status = sci_remote_device_reset_complete(idev); |
d06b487b | 1363 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda | 1364 | |
d06b487b | 1365 | if (status != SCI_SUCCESS) { |
a8a0a133 | 1366 | dev_dbg(&ihost->pdev->dev, |
89a7301f | 1367 | "%s: sci_remote_device_reset_complete(%p) " |
d06b487b | 1368 | "returned %d!\n", __func__, idev, status); |
6f231dda DW |
1369 | } |
1370 | ||
d06b487b | 1371 | dev_dbg(&ihost->pdev->dev, "%s: idev %p complete.\n", __func__, idev); |
6f231dda | 1372 | |
d06b487b DW |
1373 | return rc; |
1374 | } | |
6f231dda | 1375 | |
d06b487b DW |
1376 | int isci_task_I_T_nexus_reset(struct domain_device *dev) |
1377 | { | |
1378 | struct isci_host *ihost = dev_to_ihost(dev); | |
d06b487b DW |
1379 | struct isci_remote_device *idev; |
1380 | unsigned long flags; | |
bc6f387d | 1381 | int ret; |
d06b487b | 1382 | |
d06b487b | 1383 | spin_lock_irqsave(&ihost->scic_lock, flags); |
209fae14 | 1384 | idev = isci_lookup_device(dev); |
d06b487b DW |
1385 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
1386 | ||
209fae14 DW |
1387 | if (!idev || !test_bit(IDEV_EH, &idev->flags)) { |
1388 | ret = TMF_RESP_FUNC_COMPLETE; | |
1389 | goto out; | |
1390 | } | |
d06b487b | 1391 | |
bc6f387d | 1392 | ret = isci_reset_device(ihost, idev); |
209fae14 DW |
1393 | out: |
1394 | isci_put_device(idev); | |
1395 | return ret; | |
d06b487b DW |
1396 | } |
1397 | ||
1398 | int isci_bus_reset_handler(struct scsi_cmnd *cmd) | |
1399 | { | |
1400 | struct domain_device *dev = sdev_to_domain_dev(cmd->device); | |
209fae14 DW |
1401 | struct isci_host *ihost = dev_to_ihost(dev); |
1402 | struct isci_remote_device *idev; | |
209fae14 | 1403 | unsigned long flags; |
bc6f387d | 1404 | int ret; |
6f231dda | 1405 | |
209fae14 DW |
1406 | spin_lock_irqsave(&ihost->scic_lock, flags); |
1407 | idev = isci_lookup_device(dev); | |
1408 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
1409 | ||
1410 | if (!idev) { | |
1411 | ret = TMF_RESP_FUNC_COMPLETE; | |
1412 | goto out; | |
1413 | } | |
1414 | ||
bc6f387d | 1415 | ret = isci_reset_device(ihost, idev); |
209fae14 DW |
1416 | out: |
1417 | isci_put_device(idev); | |
1418 | return ret; | |
6f231dda | 1419 | } |