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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> |
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" | |
64 | #include "sata.h" | |
65 | #include "task.h" | |
312e0c24 | 66 | #include "host.h" |
af5ae893 | 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 | ||
9274f45e JS |
137 | |
138 | static inline int isci_device_io_ready(struct isci_remote_device *idev, | |
139 | struct sas_task *task) | |
140 | { | |
141 | return idev ? test_bit(IDEV_IO_READY, &idev->flags) || | |
142 | (test_bit(IDEV_IO_NCQERROR, &idev->flags) && | |
143 | isci_task_is_ncq_recovery(task)) | |
144 | : 0; | |
145 | } | |
6f231dda DW |
146 | /** |
147 | * isci_task_execute_task() - This function is one of the SAS Domain Template | |
148 | * functions. This function is called by libsas to send a task down to | |
149 | * hardware. | |
150 | * @task: This parameter specifies the SAS task to send. | |
151 | * @num: This parameter specifies the number of tasks to queue. | |
152 | * @gfp_flags: This parameter specifies the context of this call. | |
153 | * | |
154 | * status, zero indicates success. | |
155 | */ | |
156 | int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags) | |
157 | { | |
4393aa4e | 158 | struct isci_host *ihost = dev_to_ihost(task->dev); |
209fae14 | 159 | struct isci_remote_device *idev; |
6f231dda | 160 | unsigned long flags; |
f2088267 | 161 | bool io_ready; |
312e0c24 | 162 | u16 tag; |
6f231dda | 163 | |
1077a574 | 164 | dev_dbg(&ihost->pdev->dev, "%s: num=%d\n", __func__, num); |
6f231dda | 165 | |
1077a574 | 166 | for_each_sas_task(num, task) { |
312e0c24 DW |
167 | enum sci_status status = SCI_FAILURE; |
168 | ||
209fae14 DW |
169 | spin_lock_irqsave(&ihost->scic_lock, flags); |
170 | idev = isci_lookup_device(task->dev); | |
9274f45e | 171 | io_ready = isci_device_io_ready(idev, task); |
312e0c24 | 172 | tag = isci_alloc_tag(ihost); |
209fae14 | 173 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda | 174 | |
f2088267 DW |
175 | dev_dbg(&ihost->pdev->dev, |
176 | "task: %p, num: %d dev: %p idev: %p:%#lx cmd = %p\n", | |
177 | task, num, task->dev, idev, idev ? idev->flags : 0, | |
178 | task->uldd_task); | |
6f231dda | 179 | |
f2088267 DW |
180 | if (!idev) { |
181 | isci_task_refuse(ihost, task, SAS_TASK_UNDELIVERED, | |
182 | SAS_DEVICE_UNKNOWN); | |
312e0c24 | 183 | } else if (!io_ready || tag == SCI_CONTROLLER_INVALID_IO_TAG) { |
f2088267 DW |
184 | /* Indicate QUEUE_FULL so that the scsi midlayer |
185 | * retries. | |
186 | */ | |
187 | isci_task_refuse(ihost, task, SAS_TASK_COMPLETE, | |
188 | SAS_QUEUE_FULL); | |
f0846c68 JS |
189 | } else { |
190 | /* There is a device and it's ready for I/O. */ | |
191 | spin_lock_irqsave(&task->task_state_lock, flags); | |
6f231dda | 192 | |
f0846c68 | 193 | if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { |
f2088267 | 194 | /* The I/O was aborted. */ |
f0846c68 JS |
195 | spin_unlock_irqrestore(&task->task_state_lock, |
196 | flags); | |
6f231dda | 197 | |
1077a574 DW |
198 | isci_task_refuse(ihost, task, |
199 | SAS_TASK_UNDELIVERED, | |
200 | SAM_STAT_TASK_ABORTED); | |
f0846c68 | 201 | } else { |
6f231dda DW |
202 | task->task_state_flags |= SAS_TASK_AT_INITIATOR; |
203 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
f0846c68 JS |
204 | |
205 | /* build and send the request. */ | |
312e0c24 | 206 | status = isci_request_execute(ihost, idev, task, tag, gfp_flags); |
f0846c68 JS |
207 | |
208 | if (status != SCI_SUCCESS) { | |
209 | ||
210 | spin_lock_irqsave(&task->task_state_lock, flags); | |
211 | /* Did not really start this command. */ | |
212 | task->task_state_flags &= ~SAS_TASK_AT_INITIATOR; | |
213 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
214 | ||
215 | /* Indicate QUEUE_FULL so that the scsi | |
216 | * midlayer retries. if the request | |
217 | * failed for remote device reasons, | |
218 | * it gets returned as | |
219 | * SAS_TASK_UNDELIVERED next time | |
220 | * through. | |
221 | */ | |
1077a574 DW |
222 | isci_task_refuse(ihost, task, |
223 | SAS_TASK_COMPLETE, | |
224 | SAS_QUEUE_FULL); | |
f0846c68 | 225 | } |
6f231dda DW |
226 | } |
227 | } | |
312e0c24 DW |
228 | if (status != SCI_SUCCESS && tag != SCI_CONTROLLER_INVALID_IO_TAG) { |
229 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
230 | /* command never hit the device, so just free | |
231 | * the tci and skip the sequence increment | |
232 | */ | |
233 | isci_tci_free(ihost, ISCI_TAG_TCI(tag)); | |
234 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
235 | } | |
209fae14 | 236 | isci_put_device(idev); |
1077a574 | 237 | } |
6f231dda DW |
238 | return 0; |
239 | } | |
240 | ||
0d0cf14c | 241 | static struct isci_request *isci_task_request_build(struct isci_host *ihost, |
209fae14 | 242 | struct isci_remote_device *idev, |
312e0c24 | 243 | u16 tag, struct isci_tmf *isci_tmf) |
6f231dda | 244 | { |
6f231dda | 245 | enum sci_status status = SCI_FAILURE; |
0d0cf14c | 246 | struct isci_request *ireq = NULL; |
a1a113b0 | 247 | struct domain_device *dev; |
6f231dda | 248 | |
0d0cf14c | 249 | dev_dbg(&ihost->pdev->dev, |
6f231dda DW |
250 | "%s: isci_tmf = %p\n", __func__, isci_tmf); |
251 | ||
0d0cf14c | 252 | dev = idev->domain_dev; |
6f231dda DW |
253 | |
254 | /* do common allocation and init of request object. */ | |
209fae14 | 255 | ireq = isci_request_alloc_tmf(ihost, isci_tmf, GFP_ATOMIC); |
0d0cf14c DW |
256 | if (!ireq) |
257 | return NULL; | |
6f231dda DW |
258 | |
259 | /* let the core do it's construct. */ | |
312e0c24 | 260 | status = scic_task_request_construct(&ihost->sci, &idev->sci, tag, |
0d0cf14c | 261 | &ireq->sci); |
6f231dda DW |
262 | |
263 | if (status != SCI_SUCCESS) { | |
0d0cf14c | 264 | dev_warn(&ihost->pdev->dev, |
6f231dda DW |
265 | "%s: scic_task_request_construct failed - " |
266 | "status = 0x%x\n", | |
267 | __func__, | |
268 | status); | |
269 | goto errout; | |
270 | } | |
271 | ||
a1a113b0 DW |
272 | /* XXX convert to get this from task->tproto like other drivers */ |
273 | if (dev->dev_type == SAS_END_DEV) { | |
6f231dda | 274 | isci_tmf->proto = SAS_PROTOCOL_SSP; |
0d0cf14c | 275 | status = scic_task_request_construct_ssp(&ireq->sci); |
6f231dda DW |
276 | if (status != SCI_SUCCESS) |
277 | goto errout; | |
278 | } | |
279 | ||
a1a113b0 | 280 | if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) { |
6f231dda | 281 | isci_tmf->proto = SAS_PROTOCOL_SATA; |
0d0cf14c | 282 | status = isci_sata_management_task_request_build(ireq); |
6f231dda DW |
283 | |
284 | if (status != SCI_SUCCESS) | |
285 | goto errout; | |
286 | } | |
0d0cf14c | 287 | return ireq; |
6f231dda | 288 | errout: |
0d0cf14c | 289 | isci_request_free(ihost, ireq); |
312e0c24 | 290 | return NULL; |
6f231dda DW |
291 | } |
292 | ||
209fae14 DW |
293 | int isci_task_execute_tmf(struct isci_host *ihost, |
294 | struct isci_remote_device *isci_device, | |
295 | struct isci_tmf *tmf, unsigned long timeout_ms) | |
6f231dda DW |
296 | { |
297 | DECLARE_COMPLETION_ONSTACK(completion); | |
467e855a | 298 | enum sci_task_status status = SCI_TASK_FAILURE; |
6f231dda | 299 | struct scic_sds_remote_device *sci_device; |
0d0cf14c | 300 | struct isci_request *ireq; |
6f231dda DW |
301 | int ret = TMF_RESP_FUNC_FAILED; |
302 | unsigned long flags; | |
fd18388b | 303 | unsigned long timeleft; |
312e0c24 DW |
304 | u16 tag; |
305 | ||
306 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
307 | tag = isci_alloc_tag(ihost); | |
308 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
309 | ||
310 | if (tag == SCI_CONTROLLER_INVALID_IO_TAG) | |
311 | return ret; | |
6f231dda DW |
312 | |
313 | /* sanity check, return TMF_RESP_FUNC_FAILED | |
314 | * if the device is not there and ready. | |
315 | */ | |
9274f45e JS |
316 | if (!isci_device || |
317 | (!test_bit(IDEV_IO_READY, &isci_device->flags) && | |
318 | !test_bit(IDEV_IO_NCQERROR, &isci_device->flags))) { | |
0d0cf14c | 319 | dev_dbg(&ihost->pdev->dev, |
f2088267 | 320 | "%s: isci_device = %p not ready (%#lx)\n", |
6f231dda | 321 | __func__, |
f2088267 | 322 | isci_device, isci_device ? isci_device->flags : 0); |
312e0c24 | 323 | goto err_tci; |
6f231dda | 324 | } else |
0d0cf14c | 325 | dev_dbg(&ihost->pdev->dev, |
6f231dda DW |
326 | "%s: isci_device = %p\n", |
327 | __func__, isci_device); | |
328 | ||
57f20f4e | 329 | sci_device = &isci_device->sci; |
6f231dda DW |
330 | |
331 | /* Assign the pointer to the TMF's completion kernel wait structure. */ | |
332 | tmf->complete = &completion; | |
333 | ||
312e0c24 DW |
334 | ireq = isci_task_request_build(ihost, isci_device, tag, tmf); |
335 | if (!ireq) | |
336 | goto err_tci; | |
6f231dda | 337 | |
0d0cf14c | 338 | spin_lock_irqsave(&ihost->scic_lock, flags); |
6f231dda DW |
339 | |
340 | /* start the TMF io. */ | |
312e0c24 DW |
341 | status = scic_controller_start_task(&ihost->sci, |
342 | sci_device, | |
343 | &ireq->sci); | |
6f231dda | 344 | |
467e855a | 345 | if (status != SCI_TASK_SUCCESS) { |
0d0cf14c | 346 | dev_warn(&ihost->pdev->dev, |
6f231dda DW |
347 | "%s: start_io failed - status = 0x%x, request = %p\n", |
348 | __func__, | |
349 | status, | |
0d0cf14c DW |
350 | ireq); |
351 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
312e0c24 | 352 | goto err_ireq; |
6f231dda DW |
353 | } |
354 | ||
6f231dda DW |
355 | if (tmf->cb_state_func != NULL) |
356 | tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data); | |
357 | ||
0d0cf14c | 358 | isci_request_change_state(ireq, started); |
6f231dda DW |
359 | |
360 | /* add the request to the remote device request list. */ | |
0d0cf14c | 361 | list_add(&ireq->dev_node, &isci_device->reqs_in_process); |
6f231dda | 362 | |
0d0cf14c | 363 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda DW |
364 | |
365 | /* Wait for the TMF to complete, or a timeout. */ | |
fd18388b | 366 | timeleft = wait_for_completion_timeout(&completion, |
086a0dab | 367 | msecs_to_jiffies(timeout_ms)); |
fd18388b EN |
368 | |
369 | if (timeleft == 0) { | |
0d0cf14c | 370 | spin_lock_irqsave(&ihost->scic_lock, flags); |
fd18388b EN |
371 | |
372 | if (tmf->cb_state_func != NULL) | |
373 | tmf->cb_state_func(isci_tmf_timed_out, tmf, tmf->cb_data); | |
374 | ||
086a0dab DW |
375 | scic_controller_terminate_request(&ihost->sci, |
376 | &isci_device->sci, | |
377 | &ireq->sci); | |
fd18388b | 378 | |
0d0cf14c | 379 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
086a0dab DW |
380 | |
381 | wait_for_completion(tmf->complete); | |
fd18388b | 382 | } |
6f231dda DW |
383 | |
384 | isci_print_tmf(tmf); | |
385 | ||
386 | if (tmf->status == SCI_SUCCESS) | |
387 | ret = TMF_RESP_FUNC_COMPLETE; | |
388 | else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) { | |
0d0cf14c | 389 | dev_dbg(&ihost->pdev->dev, |
6f231dda DW |
390 | "%s: tmf.status == " |
391 | "SCI_FAILURE_IO_RESPONSE_VALID\n", | |
392 | __func__); | |
393 | ret = TMF_RESP_FUNC_COMPLETE; | |
394 | } | |
395 | /* Else - leave the default "failed" status alone. */ | |
396 | ||
0d0cf14c | 397 | dev_dbg(&ihost->pdev->dev, |
6f231dda DW |
398 | "%s: completed request = %p\n", |
399 | __func__, | |
0d0cf14c | 400 | ireq); |
6f231dda | 401 | |
6f231dda | 402 | return ret; |
312e0c24 DW |
403 | |
404 | err_ireq: | |
405 | isci_request_free(ihost, ireq); | |
406 | err_tci: | |
407 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
408 | isci_tci_free(ihost, ISCI_TAG_TCI(tag)); | |
409 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
410 | ||
411 | return ret; | |
6f231dda DW |
412 | } |
413 | ||
414 | void isci_task_build_tmf( | |
415 | struct isci_tmf *tmf, | |
6f231dda DW |
416 | enum isci_tmf_function_codes code, |
417 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
418 | struct isci_tmf *, | |
419 | void *), | |
c3f42feb | 420 | void *cb_data) |
6f231dda | 421 | { |
6f231dda DW |
422 | memset(tmf, 0, sizeof(*tmf)); |
423 | ||
6f231dda | 424 | tmf->tmf_code = code; |
6f231dda | 425 | tmf->cb_state_func = tmf_sent_cb; |
c3f42feb JS |
426 | tmf->cb_data = cb_data; |
427 | } | |
1fad9e93 | 428 | |
35173d57 | 429 | static void isci_task_build_abort_task_tmf( |
c3f42feb | 430 | struct isci_tmf *tmf, |
c3f42feb JS |
431 | enum isci_tmf_function_codes code, |
432 | void (*tmf_sent_cb)(enum isci_tmf_cb_state, | |
433 | struct isci_tmf *, | |
434 | void *), | |
435 | struct isci_request *old_request) | |
436 | { | |
209fae14 | 437 | isci_task_build_tmf(tmf, code, tmf_sent_cb, |
c3f42feb JS |
438 | (void *)old_request); |
439 | tmf->io_tag = old_request->io_tag; | |
6f231dda DW |
440 | } |
441 | ||
6f231dda DW |
442 | /** |
443 | * isci_task_validate_request_to_abort() - This function checks the given I/O | |
444 | * against the "started" state. If the request is still "started", it's | |
445 | * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD | |
446 | * BEFORE CALLING THIS FUNCTION. | |
447 | * @isci_request: This parameter specifies the request object to control. | |
448 | * @isci_host: This parameter specifies the ISCI host object | |
449 | * @isci_device: This is the device to which the request is pending. | |
450 | * @aborted_io_completion: This is a completion structure that will be added to | |
451 | * the request in case it is changed to aborting; this completion is | |
452 | * triggered when the request is fully completed. | |
453 | * | |
454 | * Either "started" on successful change of the task status to "aborted", or | |
455 | * "unallocated" if the task cannot be controlled. | |
456 | */ | |
457 | static enum isci_request_status isci_task_validate_request_to_abort( | |
458 | struct isci_request *isci_request, | |
459 | struct isci_host *isci_host, | |
460 | struct isci_remote_device *isci_device, | |
461 | struct completion *aborted_io_completion) | |
462 | { | |
463 | enum isci_request_status old_state = unallocated; | |
464 | ||
465 | /* Only abort the task if it's in the | |
466 | * device's request_in_process list | |
467 | */ | |
468 | if (isci_request && !list_empty(&isci_request->dev_node)) { | |
469 | old_state = isci_request_change_started_to_aborted( | |
470 | isci_request, aborted_io_completion); | |
471 | ||
6f231dda DW |
472 | } |
473 | ||
474 | return old_state; | |
475 | } | |
476 | ||
77c852f3 JS |
477 | /** |
478 | * isci_request_cleanup_completed_loiterer() - This function will take care of | |
479 | * the final cleanup on any request which has been explicitly terminated. | |
480 | * @isci_host: This parameter specifies the ISCI host object | |
481 | * @isci_device: This is the device to which the request is pending. | |
482 | * @isci_request: This parameter specifies the terminated request object. | |
483 | * @task: This parameter is the libsas I/O request. | |
484 | */ | |
6f231dda | 485 | static void isci_request_cleanup_completed_loiterer( |
77c852f3 | 486 | struct isci_host *isci_host, |
6f231dda | 487 | struct isci_remote_device *isci_device, |
77c852f3 JS |
488 | struct isci_request *isci_request, |
489 | struct sas_task *task) | |
6f231dda | 490 | { |
77c852f3 | 491 | unsigned long flags; |
6f231dda DW |
492 | |
493 | dev_dbg(&isci_host->pdev->dev, | |
494 | "%s: isci_device=%p, request=%p, task=%p\n", | |
18d3d72a | 495 | __func__, isci_device, isci_request, task); |
6f231dda | 496 | |
a5fde225 JS |
497 | if (task != NULL) { |
498 | ||
499 | spin_lock_irqsave(&task->task_state_lock, flags); | |
500 | task->lldd_task = NULL; | |
501 | ||
77c852f3 JS |
502 | task->task_state_flags &= ~SAS_TASK_NEED_DEV_RESET; |
503 | ||
a5fde225 JS |
504 | isci_set_task_doneflags(task); |
505 | ||
506 | /* If this task is not in the abort path, call task_done. */ | |
507 | if (!(task->task_state_flags & SAS_TASK_STATE_ABORTED)) { | |
508 | ||
509 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
510 | task->task_done(task); | |
511 | } else | |
512 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
513 | } | |
4dc043c4 | 514 | |
77c852f3 JS |
515 | if (isci_request != NULL) { |
516 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
517 | list_del_init(&isci_request->dev_node); | |
518 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
4dc043c4 | 519 | |
77c852f3 | 520 | isci_request_free(isci_host, isci_request); |
4dc043c4 | 521 | } |
4dc043c4 JS |
522 | } |
523 | ||
6f231dda DW |
524 | /** |
525 | * isci_terminate_request_core() - This function will terminate the given | |
526 | * request, and wait for it to complete. This function must only be called | |
527 | * from a thread that can wait. Note that the request is terminated and | |
528 | * completed (back to the host, if started there). | |
529 | * @isci_host: This SCU. | |
530 | * @isci_device: The target. | |
531 | * @isci_request: The I/O request to be terminated. | |
532 | * | |
6f231dda DW |
533 | */ |
534 | static void isci_terminate_request_core( | |
535 | struct isci_host *isci_host, | |
536 | struct isci_remote_device *isci_device, | |
cbb65c66 | 537 | struct isci_request *isci_request) |
6f231dda | 538 | { |
cbb65c66 | 539 | enum sci_status status = SCI_SUCCESS; |
6f231dda DW |
540 | bool was_terminated = false; |
541 | bool needs_cleanup_handling = false; | |
542 | enum isci_request_status request_status; | |
77c852f3 JS |
543 | unsigned long flags; |
544 | unsigned long termination_completed = 1; | |
545 | struct completion *io_request_completion; | |
546 | struct sas_task *task; | |
6f231dda DW |
547 | |
548 | dev_dbg(&isci_host->pdev->dev, | |
549 | "%s: device = %p; request = %p\n", | |
550 | __func__, isci_device, isci_request); | |
551 | ||
6f231dda | 552 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
4dc043c4 | 553 | |
77c852f3 JS |
554 | io_request_completion = isci_request->io_request_completion; |
555 | ||
556 | task = (isci_request->ttype == io_task) | |
557 | ? isci_request_access_task(isci_request) | |
558 | : NULL; | |
559 | ||
4dc043c4 JS |
560 | /* Note that we are not going to control |
561 | * the target to abort the request. | |
562 | */ | |
563 | isci_request->complete_in_target = true; | |
564 | ||
6f231dda DW |
565 | /* Make sure the request wasn't just sitting around signalling |
566 | * device condition (if the request handle is NULL, then the | |
567 | * request completed but needed additional handling here). | |
568 | */ | |
67ea838d | 569 | if (!isci_request->terminated) { |
6f231dda | 570 | was_terminated = true; |
cbb65c66 | 571 | needs_cleanup_handling = true; |
6f231dda | 572 | status = scic_controller_terminate_request( |
cc3dbd0a | 573 | &isci_host->sci, |
57f20f4e | 574 | &isci_device->sci, |
67ea838d | 575 | &isci_request->sci); |
6f231dda DW |
576 | } |
577 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
578 | ||
579 | /* | |
580 | * The only time the request to terminate will | |
581 | * fail is when the io request is completed and | |
582 | * being aborted. | |
583 | */ | |
4dc043c4 | 584 | if (status != SCI_SUCCESS) { |
6f231dda DW |
585 | dev_err(&isci_host->pdev->dev, |
586 | "%s: scic_controller_terminate_request" | |
587 | " returned = 0x%x\n", | |
77c852f3 JS |
588 | __func__, status); |
589 | ||
4dc043c4 JS |
590 | isci_request->io_request_completion = NULL; |
591 | ||
592 | } else { | |
6f231dda DW |
593 | if (was_terminated) { |
594 | dev_dbg(&isci_host->pdev->dev, | |
77c852f3 JS |
595 | "%s: before completion wait (%p/%p)\n", |
596 | __func__, isci_request, io_request_completion); | |
6f231dda DW |
597 | |
598 | /* Wait here for the request to complete. */ | |
77c852f3 JS |
599 | #define TERMINATION_TIMEOUT_MSEC 500 |
600 | termination_completed | |
4dc043c4 | 601 | = wait_for_completion_timeout( |
77c852f3 | 602 | io_request_completion, |
4dc043c4 JS |
603 | msecs_to_jiffies(TERMINATION_TIMEOUT_MSEC)); |
604 | ||
77c852f3 JS |
605 | if (!termination_completed) { |
606 | ||
607 | /* The request to terminate has timed out. */ | |
608 | spin_lock_irqsave(&isci_host->scic_lock, | |
609 | flags); | |
610 | ||
611 | /* Check for state changes. */ | |
612 | if (!isci_request->terminated) { | |
613 | ||
614 | /* The best we can do is to have the | |
615 | * request die a silent death if it | |
616 | * ever really completes. | |
617 | * | |
618 | * Set the request state to "dead", | |
619 | * and clear the task pointer so that | |
620 | * an actual completion event callback | |
621 | * doesn't do anything. | |
622 | */ | |
623 | isci_request->status = dead; | |
624 | isci_request->io_request_completion | |
625 | = NULL; | |
626 | ||
627 | if (isci_request->ttype == io_task) { | |
628 | ||
629 | /* Break links with the | |
630 | * sas_task. | |
631 | */ | |
632 | isci_request->ttype_ptr.io_task_ptr | |
633 | = NULL; | |
634 | } | |
635 | } else | |
636 | termination_completed = 1; | |
637 | ||
638 | spin_unlock_irqrestore(&isci_host->scic_lock, | |
639 | flags); | |
4dc043c4 | 640 | |
77c852f3 | 641 | if (!termination_completed) { |
4dc043c4 | 642 | |
77c852f3 JS |
643 | dev_err(&isci_host->pdev->dev, |
644 | "%s: *** Timeout waiting for " | |
645 | "termination(%p/%p)\n", | |
646 | __func__, io_request_completion, | |
647 | isci_request); | |
4dc043c4 | 648 | |
77c852f3 JS |
649 | /* The request can no longer be referenced |
650 | * safely since it may go away if the | |
651 | * termination every really does complete. | |
652 | */ | |
653 | isci_request = NULL; | |
654 | } | |
655 | } | |
656 | if (termination_completed) | |
4dc043c4 | 657 | dev_dbg(&isci_host->pdev->dev, |
77c852f3 JS |
658 | "%s: after completion wait (%p/%p)\n", |
659 | __func__, isci_request, io_request_completion); | |
4dc043c4 | 660 | } |
4dc043c4 | 661 | |
77c852f3 | 662 | if (termination_completed) { |
cbb65c66 | 663 | |
77c852f3 | 664 | isci_request->io_request_completion = NULL; |
6f231dda | 665 | |
77c852f3 JS |
666 | /* Peek at the status of the request. This will tell |
667 | * us if there was special handling on the request such that it | |
668 | * needs to be detached and freed here. | |
669 | */ | |
670 | spin_lock_irqsave(&isci_request->state_lock, flags); | |
671 | request_status = isci_request_get_state(isci_request); | |
672 | ||
673 | if ((isci_request->ttype == io_task) /* TMFs are in their own thread */ | |
674 | && ((request_status == aborted) | |
675 | || (request_status == aborting) | |
676 | || (request_status == terminating) | |
677 | || (request_status == completed) | |
678 | || (request_status == dead) | |
679 | ) | |
680 | ) { | |
681 | ||
682 | /* The completion routine won't free a request in | |
683 | * the aborted/aborting/etc. states, so we do | |
684 | * it here. | |
685 | */ | |
686 | needs_cleanup_handling = true; | |
687 | } | |
688 | spin_unlock_irqrestore(&isci_request->state_lock, flags); | |
6f231dda | 689 | |
77c852f3 JS |
690 | } |
691 | if (needs_cleanup_handling) | |
692 | isci_request_cleanup_completed_loiterer( | |
693 | isci_host, isci_device, isci_request, task); | |
a5fde225 | 694 | } |
6f231dda DW |
695 | } |
696 | ||
697 | /** | |
698 | * isci_terminate_pending_requests() - This function will change the all of the | |
699 | * requests on the given device's state to "aborting", will terminate the | |
700 | * requests, and wait for them to complete. This function must only be | |
701 | * called from a thread that can wait. Note that the requests are all | |
702 | * terminated and completed (back to the host, if started there). | |
703 | * @isci_host: This parameter specifies SCU. | |
704 | * @isci_device: This parameter specifies the target. | |
705 | * | |
6f231dda | 706 | */ |
980d3aeb DW |
707 | void isci_terminate_pending_requests(struct isci_host *ihost, |
708 | struct isci_remote_device *idev) | |
6f231dda | 709 | { |
980d3aeb | 710 | struct completion request_completion; |
77c852f3 | 711 | enum isci_request_status old_state; |
980d3aeb DW |
712 | unsigned long flags; |
713 | LIST_HEAD(list); | |
6f231dda | 714 | |
980d3aeb DW |
715 | spin_lock_irqsave(&ihost->scic_lock, flags); |
716 | list_splice_init(&idev->reqs_in_process, &list); | |
6f231dda | 717 | |
980d3aeb DW |
718 | /* assumes that isci_terminate_request_core deletes from the list */ |
719 | while (!list_empty(&list)) { | |
720 | struct isci_request *ireq = list_entry(list.next, typeof(*ireq), dev_node); | |
6f231dda | 721 | |
980d3aeb DW |
722 | /* Change state to "terminating" if it is currently |
723 | * "started". | |
724 | */ | |
725 | old_state = isci_request_change_started_to_newstate(ireq, | |
726 | &request_completion, | |
727 | terminating); | |
728 | switch (old_state) { | |
729 | case started: | |
730 | case completed: | |
731 | case aborting: | |
732 | break; | |
733 | default: | |
734 | /* termination in progress, or otherwise dispositioned. | |
735 | * We know the request was on 'list' so should be safe | |
736 | * to move it back to reqs_in_process | |
737 | */ | |
738 | list_move(&ireq->dev_node, &idev->reqs_in_process); | |
739 | ireq = NULL; | |
740 | break; | |
741 | } | |
4dc043c4 | 742 | |
980d3aeb DW |
743 | if (!ireq) |
744 | continue; | |
745 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
77c852f3 | 746 | |
980d3aeb | 747 | init_completion(&request_completion); |
77c852f3 | 748 | |
980d3aeb DW |
749 | dev_dbg(&ihost->pdev->dev, |
750 | "%s: idev=%p request=%p; task=%p old_state=%d\n", | |
751 | __func__, idev, ireq, | |
752 | ireq->ttype == io_task ? isci_request_access_task(ireq) : NULL, | |
753 | old_state); | |
754 | ||
755 | /* If the old_state is started: | |
756 | * This request was not already being aborted. If it had been, | |
757 | * then the aborting I/O (ie. the TMF request) would not be in | |
758 | * the aborting state, and thus would be terminated here. Note | |
759 | * that since the TMF completion's call to the kernel function | |
760 | * "complete()" does not happen until the pending I/O request | |
761 | * terminate fully completes, we do not have to implement a | |
762 | * special wait here for already aborting requests - the | |
763 | * termination of the TMF request will force the request | |
764 | * to finish it's already started terminate. | |
765 | * | |
766 | * If old_state == completed: | |
767 | * This request completed from the SCU hardware perspective | |
768 | * and now just needs cleaning up in terms of freeing the | |
769 | * request and potentially calling up to libsas. | |
770 | * | |
771 | * If old_state == aborting: | |
772 | * This request has already gone through a TMF timeout, but may | |
773 | * not have been terminated; needs cleaning up at least. | |
774 | */ | |
775 | isci_terminate_request_core(ihost, idev, ireq); | |
776 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
4dc043c4 | 777 | } |
980d3aeb | 778 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda DW |
779 | } |
780 | ||
781 | /** | |
782 | * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain | |
783 | * Template functions. | |
784 | * @lun: This parameter specifies the lun to be reset. | |
785 | * | |
786 | * status, zero indicates success. | |
787 | */ | |
788 | static int isci_task_send_lu_reset_sas( | |
789 | struct isci_host *isci_host, | |
790 | struct isci_remote_device *isci_device, | |
791 | u8 *lun) | |
792 | { | |
793 | struct isci_tmf tmf; | |
794 | int ret = TMF_RESP_FUNC_FAILED; | |
795 | ||
796 | dev_dbg(&isci_host->pdev->dev, | |
797 | "%s: isci_host = %p, isci_device = %p\n", | |
798 | __func__, isci_host, isci_device); | |
799 | /* Send the LUN reset to the target. By the time the call returns, | |
800 | * the TMF has fully exected in the target (in which case the return | |
801 | * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or | |
802 | * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED"). | |
803 | */ | |
209fae14 | 804 | isci_task_build_tmf(&tmf, isci_tmf_ssp_lun_reset, NULL, NULL); |
6f231dda DW |
805 | |
806 | #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */ | |
209fae14 | 807 | ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, ISCI_LU_RESET_TIMEOUT_MS); |
6f231dda DW |
808 | |
809 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
810 | dev_dbg(&isci_host->pdev->dev, | |
811 | "%s: %p: TMF_LU_RESET passed\n", | |
812 | __func__, isci_device); | |
813 | else | |
814 | dev_dbg(&isci_host->pdev->dev, | |
815 | "%s: %p: TMF_LU_RESET failed (%x)\n", | |
816 | __func__, isci_device, ret); | |
817 | ||
818 | return ret; | |
819 | } | |
820 | ||
821 | /** | |
822 | * isci_task_lu_reset() - This function is one of the SAS Domain Template | |
823 | * functions. This is one of the Task Management functoins called by libsas, | |
824 | * to reset the given lun. Note the assumption that while this call is | |
825 | * executing, no I/O will be sent by the host to the device. | |
826 | * @lun: This parameter specifies the lun to be reset. | |
827 | * | |
828 | * status, zero indicates success. | |
829 | */ | |
4393aa4e | 830 | int isci_task_lu_reset(struct domain_device *domain_device, u8 *lun) |
6f231dda | 831 | { |
4393aa4e | 832 | struct isci_host *isci_host = dev_to_ihost(domain_device); |
209fae14 DW |
833 | struct isci_remote_device *isci_device; |
834 | unsigned long flags; | |
6f231dda | 835 | int ret; |
6f231dda | 836 | |
209fae14 DW |
837 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
838 | isci_device = isci_lookup_device(domain_device); | |
839 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
6f231dda | 840 | |
4393aa4e DW |
841 | dev_dbg(&isci_host->pdev->dev, |
842 | "%s: domain_device=%p, isci_host=%p; isci_device=%p\n", | |
6f231dda DW |
843 | __func__, domain_device, isci_host, isci_device); |
844 | ||
209fae14 | 845 | if (isci_device) |
d06b487b | 846 | set_bit(IDEV_EH, &isci_device->flags); |
6f231dda DW |
847 | |
848 | /* If there is a device reset pending on any request in the | |
849 | * device's list, fail this LUN reset request in order to | |
850 | * escalate to the device reset. | |
851 | */ | |
209fae14 | 852 | if (!isci_device || |
4393aa4e | 853 | isci_device_is_reset_pending(isci_host, isci_device)) { |
6f231dda | 854 | dev_warn(&isci_host->pdev->dev, |
4393aa4e | 855 | "%s: No dev (%p), or " |
6f231dda | 856 | "RESET PENDING: domain_device=%p\n", |
4393aa4e | 857 | __func__, isci_device, domain_device); |
209fae14 DW |
858 | ret = TMF_RESP_FUNC_FAILED; |
859 | goto out; | |
6f231dda DW |
860 | } |
861 | ||
6f231dda DW |
862 | /* Send the task management part of the reset. */ |
863 | if (sas_protocol_ata(domain_device->tproto)) { | |
4393aa4e | 864 | ret = isci_task_send_lu_reset_sata(isci_host, isci_device, lun); |
6f231dda DW |
865 | } else |
866 | ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun); | |
867 | ||
868 | /* If the LUN reset worked, all the I/O can now be terminated. */ | |
869 | if (ret == TMF_RESP_FUNC_COMPLETE) | |
870 | /* Terminate all I/O now. */ | |
871 | isci_terminate_pending_requests(isci_host, | |
980d3aeb | 872 | isci_device); |
6f231dda | 873 | |
209fae14 DW |
874 | out: |
875 | isci_put_device(isci_device); | |
6f231dda DW |
876 | return ret; |
877 | } | |
878 | ||
879 | ||
880 | /* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */ | |
881 | int isci_task_clear_nexus_port(struct asd_sas_port *port) | |
882 | { | |
883 | return TMF_RESP_FUNC_FAILED; | |
884 | } | |
885 | ||
886 | ||
887 | ||
888 | int isci_task_clear_nexus_ha(struct sas_ha_struct *ha) | |
889 | { | |
890 | return TMF_RESP_FUNC_FAILED; | |
891 | } | |
892 | ||
6f231dda DW |
893 | /* Task Management Functions. Must be called from process context. */ |
894 | ||
895 | /** | |
896 | * isci_abort_task_process_cb() - This is a helper function for the abort task | |
897 | * TMF command. It manages the request state with respect to the successful | |
898 | * transmission / completion of the abort task request. | |
899 | * @cb_state: This parameter specifies when this function was called - after | |
900 | * the TMF request has been started and after it has timed-out. | |
901 | * @tmf: This parameter specifies the TMF in progress. | |
902 | * | |
903 | * | |
904 | */ | |
905 | static void isci_abort_task_process_cb( | |
906 | enum isci_tmf_cb_state cb_state, | |
907 | struct isci_tmf *tmf, | |
908 | void *cb_data) | |
909 | { | |
910 | struct isci_request *old_request; | |
911 | ||
912 | old_request = (struct isci_request *)cb_data; | |
913 | ||
914 | dev_dbg(&old_request->isci_host->pdev->dev, | |
915 | "%s: tmf=%p, old_request=%p\n", | |
916 | __func__, tmf, old_request); | |
917 | ||
918 | switch (cb_state) { | |
919 | ||
920 | case isci_tmf_started: | |
921 | /* The TMF has been started. Nothing to do here, since the | |
922 | * request state was already set to "aborted" by the abort | |
923 | * task function. | |
924 | */ | |
6cb4d6b3 BB |
925 | if ((old_request->status != aborted) |
926 | && (old_request->status != completed)) | |
927 | dev_err(&old_request->isci_host->pdev->dev, | |
928 | "%s: Bad request status (%d): tmf=%p, old_request=%p\n", | |
929 | __func__, old_request->status, tmf, old_request); | |
6f231dda DW |
930 | break; |
931 | ||
932 | case isci_tmf_timed_out: | |
933 | ||
934 | /* Set the task's state to "aborting", since the abort task | |
935 | * function thread set it to "aborted" (above) in anticipation | |
936 | * of the task management request working correctly. Since the | |
937 | * timeout has now fired, the TMF request failed. We set the | |
938 | * state such that the request completion will indicate the | |
939 | * device is no longer present. | |
940 | */ | |
941 | isci_request_change_state(old_request, aborting); | |
942 | break; | |
943 | ||
944 | default: | |
945 | dev_err(&old_request->isci_host->pdev->dev, | |
946 | "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n", | |
947 | __func__, cb_state, tmf, old_request); | |
948 | break; | |
949 | } | |
950 | } | |
951 | ||
952 | /** | |
953 | * isci_task_abort_task() - This function is one of the SAS Domain Template | |
954 | * functions. This function is called by libsas to abort a specified task. | |
955 | * @task: This parameter specifies the SAS task to abort. | |
956 | * | |
957 | * status, zero indicates success. | |
958 | */ | |
959 | int isci_task_abort_task(struct sas_task *task) | |
960 | { | |
4393aa4e | 961 | struct isci_host *isci_host = dev_to_ihost(task->dev); |
6f231dda | 962 | DECLARE_COMPLETION_ONSTACK(aborted_io_completion); |
a5fde225 JS |
963 | struct isci_request *old_request = NULL; |
964 | enum isci_request_status old_state; | |
6f231dda | 965 | struct isci_remote_device *isci_device = NULL; |
a5fde225 JS |
966 | struct isci_tmf tmf; |
967 | int ret = TMF_RESP_FUNC_FAILED; | |
968 | unsigned long flags; | |
969 | bool any_dev_reset = false; | |
6f231dda DW |
970 | |
971 | /* Get the isci_request reference from the task. Note that | |
972 | * this check does not depend on the pending request list | |
973 | * in the device, because tasks driving resets may land here | |
974 | * after completion in the core. | |
975 | */ | |
209fae14 DW |
976 | spin_lock_irqsave(&isci_host->scic_lock, flags); |
977 | spin_lock(&task->task_state_lock); | |
978 | ||
979 | old_request = task->lldd_task; | |
980 | ||
981 | /* If task is already done, the request isn't valid */ | |
982 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE) && | |
983 | (task->task_state_flags & SAS_TASK_AT_INITIATOR) && | |
984 | old_request) | |
985 | isci_device = isci_lookup_device(task->dev); | |
986 | ||
987 | spin_unlock(&task->task_state_lock); | |
988 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
6f231dda DW |
989 | |
990 | dev_dbg(&isci_host->pdev->dev, | |
991 | "%s: task = %p\n", __func__, task); | |
992 | ||
209fae14 DW |
993 | if (!isci_device || !old_request) |
994 | goto out; | |
6f231dda | 995 | |
d06b487b DW |
996 | set_bit(IDEV_EH, &isci_device->flags); |
997 | ||
6f231dda DW |
998 | /* This version of the driver will fail abort requests for |
999 | * SATA/STP. Failing the abort request this way will cause the | |
1000 | * SCSI error handler thread to escalate to LUN reset | |
1001 | */ | |
209fae14 | 1002 | if (sas_protocol_ata(task->task_proto)) { |
6f231dda DW |
1003 | dev_warn(&isci_host->pdev->dev, |
1004 | " task %p is for a STP/SATA device;" | |
1005 | " returning TMF_RESP_FUNC_FAILED\n" | |
1006 | " to cause a LUN reset...\n", task); | |
209fae14 | 1007 | goto out; |
6f231dda DW |
1008 | } |
1009 | ||
1010 | dev_dbg(&isci_host->pdev->dev, | |
1011 | "%s: old_request == %p\n", __func__, old_request); | |
1012 | ||
209fae14 | 1013 | any_dev_reset = isci_device_is_reset_pending(isci_host,isci_device); |
a5fde225 | 1014 | |
6f231dda DW |
1015 | spin_lock_irqsave(&task->task_state_lock, flags); |
1016 | ||
209fae14 | 1017 | any_dev_reset = any_dev_reset || (task->task_state_flags & SAS_TASK_NEED_DEV_RESET); |
6f231dda DW |
1018 | |
1019 | /* If the extraction of the request reference from the task | |
1020 | * failed, then the request has been completed (or if there is a | |
1021 | * pending reset then this abort request function must be failed | |
1022 | * in order to escalate to the target reset). | |
1023 | */ | |
a5fde225 | 1024 | if ((old_request == NULL) || any_dev_reset) { |
6f231dda DW |
1025 | |
1026 | /* If the device reset task flag is set, fail the task | |
1027 | * management request. Otherwise, the original request | |
1028 | * has completed. | |
1029 | */ | |
1030 | if (any_dev_reset) { | |
1031 | ||
1032 | /* Turn off the task's DONE to make sure this | |
1033 | * task is escalated to a target reset. | |
1034 | */ | |
1035 | task->task_state_flags &= ~SAS_TASK_STATE_DONE; | |
1036 | ||
a5fde225 JS |
1037 | /* Make the reset happen as soon as possible. */ |
1038 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
1039 | ||
1040 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1041 | ||
6f231dda DW |
1042 | /* Fail the task management request in order to |
1043 | * escalate to the target reset. | |
1044 | */ | |
1045 | ret = TMF_RESP_FUNC_FAILED; | |
1046 | ||
1047 | dev_dbg(&isci_host->pdev->dev, | |
1048 | "%s: Failing task abort in order to " | |
1049 | "escalate to target reset because\n" | |
1050 | "SAS_TASK_NEED_DEV_RESET is set for " | |
1051 | "task %p on dev %p\n", | |
1052 | __func__, task, isci_device); | |
1053 | ||
6f231dda | 1054 | |
a5fde225 | 1055 | } else { |
6f231dda DW |
1056 | /* The request has already completed and there |
1057 | * is nothing to do here other than to set the task | |
1058 | * done bit, and indicate that the task abort function | |
1059 | * was sucessful. | |
1060 | */ | |
1061 | isci_set_task_doneflags(task); | |
1062 | ||
a5fde225 | 1063 | spin_unlock_irqrestore(&task->task_state_lock, flags); |
6f231dda | 1064 | |
a5fde225 | 1065 | ret = TMF_RESP_FUNC_COMPLETE; |
6f231dda | 1066 | |
a5fde225 JS |
1067 | dev_dbg(&isci_host->pdev->dev, |
1068 | "%s: abort task not needed for %p\n", | |
1069 | __func__, task); | |
6f231dda | 1070 | } |
209fae14 | 1071 | goto out; |
6f231dda | 1072 | } |
a5fde225 JS |
1073 | else |
1074 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
6f231dda DW |
1075 | |
1076 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
1077 | ||
f219f010 | 1078 | /* Check the request status and change to "aborted" if currently |
a5fde225 | 1079 | * "starting"; if true then set the I/O kernel completion |
6f231dda DW |
1080 | * struct that will be triggered when the request completes. |
1081 | */ | |
a5fde225 JS |
1082 | old_state = isci_task_validate_request_to_abort( |
1083 | old_request, isci_host, isci_device, | |
1084 | &aborted_io_completion); | |
f219f010 JS |
1085 | if ((old_state != started) && |
1086 | (old_state != completed) && | |
1087 | (old_state != aborting)) { | |
6f231dda DW |
1088 | |
1089 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1090 | ||
a5fde225 JS |
1091 | /* The request was already being handled by someone else (because |
1092 | * they got to set the state away from started). | |
1093 | */ | |
1094 | dev_dbg(&isci_host->pdev->dev, | |
1095 | "%s: device = %p; old_request %p already being aborted\n", | |
1096 | __func__, | |
1097 | isci_device, old_request); | |
209fae14 DW |
1098 | ret = TMF_RESP_FUNC_COMPLETE; |
1099 | goto out; | |
6f231dda | 1100 | } |
a5fde225 | 1101 | if ((task->task_proto == SAS_PROTOCOL_SMP) |
a5fde225 JS |
1102 | || old_request->complete_in_target |
1103 | ) { | |
6f231dda DW |
1104 | |
1105 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
1106 | ||
a5fde225 JS |
1107 | dev_dbg(&isci_host->pdev->dev, |
1108 | "%s: SMP request (%d)" | |
a5fde225 JS |
1109 | " or complete_in_target (%d), thus no TMF\n", |
1110 | __func__, (task->task_proto == SAS_PROTOCOL_SMP), | |
209fae14 | 1111 | old_request->complete_in_target); |
a5fde225 | 1112 | |
6f231dda DW |
1113 | /* Set the state on the task. */ |
1114 | isci_task_all_done(task); | |
1115 | ||
1116 | ret = TMF_RESP_FUNC_COMPLETE; | |
1117 | ||
1118 | /* Stopping and SMP devices are not sent a TMF, and are not | |
a5fde225 | 1119 | * reset, but the outstanding I/O request is terminated below. |
6f231dda | 1120 | */ |
6f231dda DW |
1121 | } else { |
1122 | /* Fill in the tmf stucture */ | |
209fae14 | 1123 | isci_task_build_abort_task_tmf(&tmf, isci_tmf_ssp_task_abort, |
c3f42feb JS |
1124 | isci_abort_task_process_cb, |
1125 | old_request); | |
6f231dda | 1126 | |
6f231dda DW |
1127 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); |
1128 | ||
1129 | #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */ | |
209fae14 | 1130 | ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, |
6f231dda DW |
1131 | ISCI_ABORT_TASK_TIMEOUT_MS); |
1132 | ||
a5fde225 | 1133 | if (ret != TMF_RESP_FUNC_COMPLETE) |
6f231dda DW |
1134 | dev_err(&isci_host->pdev->dev, |
1135 | "%s: isci_task_send_tmf failed\n", | |
1136 | __func__); | |
1137 | } | |
a5fde225 JS |
1138 | if (ret == TMF_RESP_FUNC_COMPLETE) { |
1139 | old_request->complete_in_target = true; | |
1140 | ||
77c852f3 JS |
1141 | /* Clean up the request on our side, and wait for the aborted |
1142 | * I/O to complete. | |
1143 | */ | |
cbb65c66 | 1144 | isci_terminate_request_core(isci_host, isci_device, old_request); |
a5fde225 | 1145 | } |
6f231dda | 1146 | |
a5fde225 JS |
1147 | /* Make sure we do not leave a reference to aborted_io_completion */ |
1148 | old_request->io_request_completion = NULL; | |
209fae14 DW |
1149 | out: |
1150 | isci_put_device(isci_device); | |
6f231dda DW |
1151 | return ret; |
1152 | } | |
1153 | ||
1154 | /** | |
1155 | * isci_task_abort_task_set() - This function is one of the SAS Domain Template | |
1156 | * functions. This is one of the Task Management functoins called by libsas, | |
1157 | * to abort all task for the given lun. | |
1158 | * @d_device: This parameter specifies the domain device associated with this | |
1159 | * request. | |
1160 | * @lun: This parameter specifies the lun associated with this request. | |
1161 | * | |
1162 | * status, zero indicates success. | |
1163 | */ | |
1164 | int isci_task_abort_task_set( | |
1165 | struct domain_device *d_device, | |
1166 | u8 *lun) | |
1167 | { | |
1168 | return TMF_RESP_FUNC_FAILED; | |
1169 | } | |
1170 | ||
1171 | ||
1172 | /** | |
1173 | * isci_task_clear_aca() - This function is one of the SAS Domain Template | |
1174 | * functions. This is one of the Task Management functoins called by libsas. | |
1175 | * @d_device: This parameter specifies the domain device associated with this | |
1176 | * request. | |
1177 | * @lun: This parameter specifies the lun associated with this request. | |
1178 | * | |
1179 | * status, zero indicates success. | |
1180 | */ | |
1181 | int isci_task_clear_aca( | |
1182 | struct domain_device *d_device, | |
1183 | u8 *lun) | |
1184 | { | |
1185 | return TMF_RESP_FUNC_FAILED; | |
1186 | } | |
1187 | ||
1188 | ||
1189 | ||
1190 | /** | |
1191 | * isci_task_clear_task_set() - This function is one of the SAS Domain Template | |
1192 | * functions. This is one of the Task Management functoins called by libsas. | |
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_clear_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_query_task() - This function is implemented to cause libsas to | |
1209 | * correctly escalate the failed abort to a LUN or target reset (this is | |
1210 | * because sas_scsi_find_task libsas function does not correctly interpret | |
1211 | * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is | |
1212 | * returned, libsas turns this into a LUN reset; when FUNC_FAILED is | |
1213 | * returned, libsas will turn this into a target reset | |
1214 | * @task: This parameter specifies the sas task being queried. | |
1215 | * @lun: This parameter specifies the lun associated with this request. | |
1216 | * | |
1217 | * status, zero indicates success. | |
1218 | */ | |
1219 | int isci_task_query_task( | |
1220 | struct sas_task *task) | |
1221 | { | |
1222 | /* See if there is a pending device reset for this device. */ | |
1223 | if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) | |
1224 | return TMF_RESP_FUNC_FAILED; | |
1225 | else | |
1226 | return TMF_RESP_FUNC_SUCC; | |
1227 | } | |
1228 | ||
af5ae893 | 1229 | /* |
6f231dda DW |
1230 | * isci_task_request_complete() - This function is called by the sci core when |
1231 | * an task request completes. | |
af5ae893 DJ |
1232 | * @ihost: This parameter specifies the ISCI host object |
1233 | * @ireq: This parameter is the completed isci_request object. | |
6f231dda DW |
1234 | * @completion_status: This parameter specifies the completion status from the |
1235 | * sci core. | |
1236 | * | |
1237 | * none. | |
1238 | */ | |
af5ae893 DJ |
1239 | void |
1240 | isci_task_request_complete(struct isci_host *ihost, | |
1241 | struct isci_request *ireq, | |
1242 | enum sci_task_status completion_status) | |
6f231dda | 1243 | { |
af5ae893 | 1244 | struct isci_tmf *tmf = isci_request_access_tmf(ireq); |
6f231dda | 1245 | struct completion *tmf_complete; |
67ea838d | 1246 | struct scic_sds_request *sci_req = &ireq->sci; |
6f231dda | 1247 | |
af5ae893 | 1248 | dev_dbg(&ihost->pdev->dev, |
6f231dda | 1249 | "%s: request = %p, status=%d\n", |
af5ae893 | 1250 | __func__, ireq, completion_status); |
6f231dda | 1251 | |
8d2c65c0 | 1252 | isci_request_change_state(ireq, completed); |
6f231dda DW |
1253 | |
1254 | tmf->status = completion_status; | |
af5ae893 | 1255 | ireq->complete_in_target = true; |
6f231dda | 1256 | |
af5ae893 | 1257 | if (tmf->proto == SAS_PROTOCOL_SSP) { |
6f231dda | 1258 | memcpy(&tmf->resp.resp_iu, |
b7645818 | 1259 | &sci_req->ssp.rsp, |
af5ae893 DJ |
1260 | SSP_RESP_IU_MAX_SIZE); |
1261 | } else if (tmf->proto == SAS_PROTOCOL_SATA) { | |
6f231dda | 1262 | memcpy(&tmf->resp.d2h_fis, |
b7645818 | 1263 | &sci_req->stp.rsp, |
f2f30080 | 1264 | sizeof(struct dev_to_host_fis)); |
6f231dda DW |
1265 | } |
1266 | ||
6f231dda DW |
1267 | /* PRINT_TMF( ((struct isci_tmf *)request->task)); */ |
1268 | tmf_complete = tmf->complete; | |
1269 | ||
209fae14 | 1270 | scic_controller_complete_io(&ihost->sci, ireq->sci.target_device, &ireq->sci); |
67ea838d | 1271 | /* set the 'terminated' flag handle to make sure it cannot be terminated |
6f231dda DW |
1272 | * or completed again. |
1273 | */ | |
67ea838d | 1274 | ireq->terminated = true;; |
6f231dda | 1275 | |
af5ae893 DJ |
1276 | isci_request_change_state(ireq, unallocated); |
1277 | list_del_init(&ireq->dev_node); | |
6f231dda DW |
1278 | |
1279 | /* The task management part completes last. */ | |
1280 | complete(tmf_complete); | |
1281 | } | |
1282 | ||
61aaff49 JS |
1283 | static void isci_smp_task_timedout(unsigned long _task) |
1284 | { | |
1285 | struct sas_task *task = (void *) _task; | |
1286 | unsigned long flags; | |
1287 | ||
1288 | spin_lock_irqsave(&task->task_state_lock, flags); | |
1289 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) | |
1290 | task->task_state_flags |= SAS_TASK_STATE_ABORTED; | |
1291 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
1292 | ||
1293 | complete(&task->completion); | |
1294 | } | |
1295 | ||
1296 | static void isci_smp_task_done(struct sas_task *task) | |
1297 | { | |
1298 | if (!del_timer(&task->timer)) | |
1299 | return; | |
1300 | complete(&task->completion); | |
1301 | } | |
1302 | ||
1303 | static struct sas_task *isci_alloc_task(void) | |
1304 | { | |
1305 | struct sas_task *task = kzalloc(sizeof(*task), GFP_KERNEL); | |
1306 | ||
1307 | if (task) { | |
1308 | INIT_LIST_HEAD(&task->list); | |
1309 | spin_lock_init(&task->task_state_lock); | |
1310 | task->task_state_flags = SAS_TASK_STATE_PENDING; | |
1311 | init_timer(&task->timer); | |
1312 | init_completion(&task->completion); | |
1313 | } | |
1314 | ||
1315 | return task; | |
1316 | } | |
1317 | ||
1318 | static void isci_free_task(struct isci_host *ihost, struct sas_task *task) | |
1319 | { | |
1320 | if (task) { | |
1321 | BUG_ON(!list_empty(&task->list)); | |
1322 | kfree(task); | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | static int isci_smp_execute_task(struct isci_host *ihost, | |
1327 | struct domain_device *dev, void *req, | |
1328 | int req_size, void *resp, int resp_size) | |
1329 | { | |
1330 | int res, retry; | |
1331 | struct sas_task *task = NULL; | |
1332 | ||
1333 | for (retry = 0; retry < 3; retry++) { | |
1334 | task = isci_alloc_task(); | |
1335 | if (!task) | |
1336 | return -ENOMEM; | |
1337 | ||
1338 | task->dev = dev; | |
1339 | task->task_proto = dev->tproto; | |
1340 | sg_init_one(&task->smp_task.smp_req, req, req_size); | |
1341 | sg_init_one(&task->smp_task.smp_resp, resp, resp_size); | |
1342 | ||
1343 | task->task_done = isci_smp_task_done; | |
1344 | ||
1345 | task->timer.data = (unsigned long) task; | |
1346 | task->timer.function = isci_smp_task_timedout; | |
1347 | task->timer.expires = jiffies + 10*HZ; | |
1348 | add_timer(&task->timer); | |
1349 | ||
1350 | res = isci_task_execute_task(task, 1, GFP_KERNEL); | |
1351 | ||
1352 | if (res) { | |
1353 | del_timer(&task->timer); | |
1354 | dev_err(&ihost->pdev->dev, | |
1355 | "%s: executing SMP task failed:%d\n", | |
1356 | __func__, res); | |
1357 | goto ex_err; | |
1358 | } | |
1359 | ||
1360 | wait_for_completion(&task->completion); | |
1361 | res = -ECOMM; | |
1362 | if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { | |
1363 | dev_err(&ihost->pdev->dev, | |
1364 | "%s: smp task timed out or aborted\n", | |
1365 | __func__); | |
1366 | isci_task_abort_task(task); | |
1367 | if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { | |
1368 | dev_err(&ihost->pdev->dev, | |
1369 | "%s: SMP task aborted and not done\n", | |
1370 | __func__); | |
1371 | goto ex_err; | |
1372 | } | |
1373 | } | |
1374 | if (task->task_status.resp == SAS_TASK_COMPLETE && | |
1375 | task->task_status.stat == SAM_STAT_GOOD) { | |
1376 | res = 0; | |
1377 | break; | |
1378 | } | |
1379 | if (task->task_status.resp == SAS_TASK_COMPLETE && | |
1380 | task->task_status.stat == SAS_DATA_UNDERRUN) { | |
1381 | /* no error, but return the number of bytes of | |
1382 | * underrun */ | |
1383 | res = task->task_status.residual; | |
1384 | break; | |
1385 | } | |
1386 | if (task->task_status.resp == SAS_TASK_COMPLETE && | |
1387 | task->task_status.stat == SAS_DATA_OVERRUN) { | |
1388 | res = -EMSGSIZE; | |
1389 | break; | |
1390 | } else { | |
1391 | dev_err(&ihost->pdev->dev, | |
1392 | "%s: task to dev %016llx response: 0x%x " | |
1393 | "status 0x%x\n", __func__, | |
1394 | SAS_ADDR(dev->sas_addr), | |
1395 | task->task_status.resp, | |
1396 | task->task_status.stat); | |
1397 | isci_free_task(ihost, task); | |
1398 | task = NULL; | |
1399 | } | |
1400 | } | |
1401 | ex_err: | |
1402 | BUG_ON(retry == 3 && task != NULL); | |
1403 | isci_free_task(ihost, task); | |
1404 | return res; | |
1405 | } | |
1406 | ||
1407 | #define DISCOVER_REQ_SIZE 16 | |
1408 | #define DISCOVER_RESP_SIZE 56 | |
1409 | ||
1410 | int isci_smp_get_phy_attached_dev_type(struct isci_host *ihost, | |
1411 | struct domain_device *dev, | |
1412 | int phy_id, int *adt) | |
1413 | { | |
1414 | struct smp_resp *disc_resp; | |
1415 | u8 *disc_req; | |
1416 | int res; | |
1417 | ||
1418 | disc_resp = kzalloc(DISCOVER_RESP_SIZE, GFP_KERNEL); | |
1419 | if (!disc_resp) | |
1420 | return -ENOMEM; | |
1421 | ||
1422 | disc_req = kzalloc(DISCOVER_REQ_SIZE, GFP_KERNEL); | |
1423 | if (disc_req) { | |
1424 | disc_req[0] = SMP_REQUEST; | |
1425 | disc_req[1] = SMP_DISCOVER; | |
1426 | disc_req[9] = phy_id; | |
1427 | } else { | |
1428 | kfree(disc_resp); | |
1429 | return -ENOMEM; | |
1430 | } | |
1431 | res = isci_smp_execute_task(ihost, dev, disc_req, DISCOVER_REQ_SIZE, | |
1432 | disc_resp, DISCOVER_RESP_SIZE); | |
1433 | if (!res) { | |
1434 | if (disc_resp->result != SMP_RESP_FUNC_ACC) | |
1435 | res = disc_resp->result; | |
1436 | else | |
1437 | *adt = disc_resp->disc.attached_dev_type; | |
1438 | } | |
1439 | kfree(disc_req); | |
1440 | kfree(disc_resp); | |
1441 | ||
1442 | return res; | |
1443 | } | |
1444 | ||
1445 | static void isci_wait_for_smp_phy_reset(struct isci_remote_device *idev, int phy_num) | |
1446 | { | |
1447 | struct domain_device *dev = idev->domain_dev; | |
1448 | struct isci_port *iport = idev->isci_port; | |
1449 | struct isci_host *ihost = iport->isci_host; | |
1450 | int res, iteration = 0, attached_device_type; | |
1451 | #define STP_WAIT_MSECS 25000 | |
1452 | unsigned long tmo = msecs_to_jiffies(STP_WAIT_MSECS); | |
1453 | unsigned long deadline = jiffies + tmo; | |
1454 | enum { | |
1455 | SMP_PHYWAIT_PHYDOWN, | |
1456 | SMP_PHYWAIT_PHYUP, | |
1457 | SMP_PHYWAIT_DONE | |
1458 | } phy_state = SMP_PHYWAIT_PHYDOWN; | |
1459 | ||
1460 | /* While there is time, wait for the phy to go away and come back */ | |
1461 | while (time_is_after_jiffies(deadline) && phy_state != SMP_PHYWAIT_DONE) { | |
1462 | int event = atomic_read(&iport->event); | |
1463 | ||
1464 | ++iteration; | |
1465 | ||
1466 | tmo = wait_event_timeout(ihost->eventq, | |
1467 | event != atomic_read(&iport->event) || | |
1468 | !test_bit(IPORT_BCN_BLOCKED, &iport->flags), | |
1469 | tmo); | |
1470 | /* link down, stop polling */ | |
1471 | if (!test_bit(IPORT_BCN_BLOCKED, &iport->flags)) | |
1472 | break; | |
1473 | ||
1474 | dev_dbg(&ihost->pdev->dev, | |
1475 | "%s: iport %p, iteration %d," | |
1476 | " phase %d: time_remaining %lu, bcns = %d\n", | |
1477 | __func__, iport, iteration, phy_state, | |
1478 | tmo, test_bit(IPORT_BCN_PENDING, &iport->flags)); | |
1479 | ||
1480 | res = isci_smp_get_phy_attached_dev_type(ihost, dev, phy_num, | |
1481 | &attached_device_type); | |
1482 | tmo = deadline - jiffies; | |
1483 | ||
1484 | if (res) { | |
1485 | dev_warn(&ihost->pdev->dev, | |
1486 | "%s: iteration %d, phase %d:" | |
1487 | " SMP error=%d, time_remaining=%lu\n", | |
1488 | __func__, iteration, phy_state, res, tmo); | |
1489 | break; | |
1490 | } | |
1491 | dev_dbg(&ihost->pdev->dev, | |
1492 | "%s: iport %p, iteration %d," | |
1493 | " phase %d: time_remaining %lu, bcns = %d, " | |
1494 | "attdevtype = %x\n", | |
1495 | __func__, iport, iteration, phy_state, | |
1496 | tmo, test_bit(IPORT_BCN_PENDING, &iport->flags), | |
1497 | attached_device_type); | |
1498 | ||
1499 | switch (phy_state) { | |
1500 | case SMP_PHYWAIT_PHYDOWN: | |
1501 | /* Has the device gone away? */ | |
1502 | if (!attached_device_type) | |
1503 | phy_state = SMP_PHYWAIT_PHYUP; | |
1504 | ||
1505 | break; | |
1506 | ||
1507 | case SMP_PHYWAIT_PHYUP: | |
1508 | /* Has the device come back? */ | |
1509 | if (attached_device_type) | |
1510 | phy_state = SMP_PHYWAIT_DONE; | |
1511 | break; | |
1512 | ||
1513 | case SMP_PHYWAIT_DONE: | |
1514 | break; | |
1515 | } | |
1516 | ||
1517 | } | |
1518 | dev_dbg(&ihost->pdev->dev, "%s: done\n", __func__); | |
1519 | } | |
1520 | ||
209fae14 DW |
1521 | static int isci_reset_device(struct isci_host *ihost, |
1522 | struct isci_remote_device *idev, int hard_reset) | |
6f231dda | 1523 | { |
209fae14 | 1524 | struct sas_phy *phy = sas_find_local_phy(idev->domain_dev); |
61aaff49 | 1525 | struct isci_port *iport = idev->isci_port; |
6f231dda | 1526 | enum sci_status status; |
d06b487b DW |
1527 | unsigned long flags; |
1528 | int rc; | |
6f231dda | 1529 | |
d06b487b | 1530 | dev_dbg(&ihost->pdev->dev, "%s: idev %p\n", __func__, idev); |
6f231dda | 1531 | |
d06b487b DW |
1532 | spin_lock_irqsave(&ihost->scic_lock, flags); |
1533 | status = scic_remote_device_reset(&idev->sci); | |
6f231dda | 1534 | if (status != SCI_SUCCESS) { |
d06b487b | 1535 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda | 1536 | |
d06b487b DW |
1537 | dev_warn(&ihost->pdev->dev, |
1538 | "%s: scic_remote_device_reset(%p) returned %d!\n", | |
1539 | __func__, idev, status); | |
6f231dda DW |
1540 | |
1541 | return TMF_RESP_FUNC_FAILED; | |
1542 | } | |
d06b487b | 1543 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
6f231dda | 1544 | |
6f231dda | 1545 | /* Make sure all pending requests are able to be fully terminated. */ |
d06b487b | 1546 | isci_device_clear_reset_pending(ihost, idev); |
6f231dda | 1547 | |
61aaff49 JS |
1548 | /* If this is a device on an expander, disable BCN processing. */ |
1549 | if (!scsi_is_sas_phy_local(phy)) | |
1550 | set_bit(IPORT_BCN_BLOCKED, &iport->flags); | |
1551 | ||
d06b487b | 1552 | rc = sas_phy_reset(phy, hard_reset); |
6f231dda | 1553 | |
d06b487b DW |
1554 | /* Terminate in-progress I/O now. */ |
1555 | isci_remote_device_nuke_requests(ihost, idev); | |
6f231dda | 1556 | |
ff717ab0 | 1557 | /* Since all pending TCs have been cleaned, resume the RNC. */ |
d06b487b DW |
1558 | spin_lock_irqsave(&ihost->scic_lock, flags); |
1559 | status = scic_remote_device_reset_complete(&idev->sci); | |
1560 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
6f231dda | 1561 | |
61aaff49 JS |
1562 | /* If this is a device on an expander, bring the phy back up. */ |
1563 | if (!scsi_is_sas_phy_local(phy)) { | |
1564 | /* A phy reset will cause the device to go away then reappear. | |
1565 | * Since libsas will take action on incoming BCNs (eg. remove | |
1566 | * a device going through an SMP phy-control driven reset), | |
1567 | * we need to wait until the phy comes back up before letting | |
1568 | * discovery proceed in libsas. | |
1569 | */ | |
1570 | isci_wait_for_smp_phy_reset(idev, phy->number); | |
1571 | ||
1572 | spin_lock_irqsave(&ihost->scic_lock, flags); | |
1573 | isci_port_bcn_enable(ihost, idev->isci_port); | |
1574 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
1575 | } | |
ff717ab0 | 1576 | |
d06b487b DW |
1577 | if (status != SCI_SUCCESS) { |
1578 | dev_warn(&ihost->pdev->dev, | |
1579 | "%s: scic_remote_device_reset_complete(%p) " | |
1580 | "returned %d!\n", __func__, idev, status); | |
6f231dda DW |
1581 | } |
1582 | ||
d06b487b | 1583 | dev_dbg(&ihost->pdev->dev, "%s: idev %p complete.\n", __func__, idev); |
6f231dda | 1584 | |
d06b487b DW |
1585 | return rc; |
1586 | } | |
6f231dda | 1587 | |
d06b487b DW |
1588 | int isci_task_I_T_nexus_reset(struct domain_device *dev) |
1589 | { | |
1590 | struct isci_host *ihost = dev_to_ihost(dev); | |
d06b487b | 1591 | struct isci_remote_device *idev; |
209fae14 | 1592 | int ret, hard_reset = 1; |
d06b487b DW |
1593 | unsigned long flags; |
1594 | ||
d06b487b | 1595 | spin_lock_irqsave(&ihost->scic_lock, flags); |
209fae14 | 1596 | idev = isci_lookup_device(dev); |
d06b487b DW |
1597 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
1598 | ||
209fae14 DW |
1599 | if (!idev || !test_bit(IDEV_EH, &idev->flags)) { |
1600 | ret = TMF_RESP_FUNC_COMPLETE; | |
1601 | goto out; | |
1602 | } | |
d06b487b DW |
1603 | |
1604 | if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) | |
1605 | hard_reset = 0; | |
1606 | ||
209fae14 DW |
1607 | ret = isci_reset_device(ihost, idev, hard_reset); |
1608 | out: | |
1609 | isci_put_device(idev); | |
1610 | return ret; | |
d06b487b DW |
1611 | } |
1612 | ||
1613 | int isci_bus_reset_handler(struct scsi_cmnd *cmd) | |
1614 | { | |
1615 | struct domain_device *dev = sdev_to_domain_dev(cmd->device); | |
209fae14 DW |
1616 | struct isci_host *ihost = dev_to_ihost(dev); |
1617 | struct isci_remote_device *idev; | |
1618 | int ret, hard_reset = 1; | |
1619 | unsigned long flags; | |
d06b487b DW |
1620 | |
1621 | if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) | |
1622 | hard_reset = 0; | |
6f231dda | 1623 | |
209fae14 DW |
1624 | spin_lock_irqsave(&ihost->scic_lock, flags); |
1625 | idev = isci_lookup_device(dev); | |
1626 | spin_unlock_irqrestore(&ihost->scic_lock, flags); | |
1627 | ||
1628 | if (!idev) { | |
1629 | ret = TMF_RESP_FUNC_COMPLETE; | |
1630 | goto out; | |
1631 | } | |
1632 | ||
1633 | ret = isci_reset_device(ihost, idev, hard_reset); | |
1634 | out: | |
1635 | isci_put_device(idev); | |
1636 | return ret; | |
6f231dda | 1637 | } |