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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 "isci.h" | |
57 | #include "scic_remote_device.h" | |
58 | #include "scic_io_request.h" | |
59 | #include "scic_task_request.h" | |
60 | #include "scic_port.h" | |
61 | #include "task.h" | |
62 | #include "request.h" | |
63 | #include "sata.h" | |
64 | #include "scu_completion_codes.h" | |
65 | ||
66 | ||
67 | static enum sci_status isci_request_ssp_request_construct( | |
68 | struct isci_request *request) | |
69 | { | |
70 | enum sci_status status; | |
71 | ||
72 | dev_dbg(&request->isci_host->pdev->dev, | |
73 | "%s: request = %p\n", | |
74 | __func__, | |
75 | request); | |
76 | status = scic_io_request_construct_basic_ssp( | |
77 | request->sci_request_handle | |
78 | ); | |
79 | return status; | |
80 | } | |
81 | ||
82 | static enum sci_status isci_request_stp_request_construct( | |
83 | struct isci_request *request) | |
84 | { | |
85 | struct sas_task *task = isci_request_access_task(request); | |
86 | enum sci_status status; | |
87 | struct host_to_dev_fis *register_fis; | |
88 | ||
89 | dev_dbg(&request->isci_host->pdev->dev, | |
90 | "%s: request = %p\n", | |
91 | __func__, | |
92 | request); | |
93 | ||
94 | /* Get the host_to_dev_fis from the core and copy | |
95 | * the fis from the task into it. | |
96 | */ | |
97 | register_fis = isci_sata_task_to_fis_copy(task); | |
98 | ||
99 | status = scic_io_request_construct_basic_sata( | |
100 | request->sci_request_handle | |
101 | ); | |
102 | ||
103 | /* Set the ncq tag in the fis, from the queue | |
104 | * command in the task. | |
105 | */ | |
106 | if (isci_sata_is_task_ncq(task)) { | |
107 | ||
108 | isci_sata_set_ncq_tag( | |
109 | register_fis, | |
110 | task | |
111 | ); | |
112 | } | |
113 | ||
114 | return status; | |
115 | } | |
116 | ||
117 | /** | |
118 | * isci_smp_request_build() - This function builds the smp request object. | |
119 | * @isci_host: This parameter specifies the ISCI host object | |
120 | * @request: This parameter points to the isci_request object allocated in the | |
121 | * request construct function. | |
122 | * @sci_device: This parameter is the handle for the sci core's remote device | |
123 | * object that is the destination for this request. | |
124 | * | |
125 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
126 | */ | |
127 | static enum sci_status isci_smp_request_build( | |
128 | struct isci_request *request) | |
129 | { | |
130 | enum sci_status status = SCI_FAILURE; | |
131 | struct sas_task *task = isci_request_access_task(request); | |
132 | ||
133 | void *command_iu_address = | |
134 | scic_io_request_get_command_iu_address( | |
135 | request->sci_request_handle | |
136 | ); | |
137 | ||
138 | dev_dbg(&request->isci_host->pdev->dev, | |
139 | "%s: request = %p\n", | |
140 | __func__, | |
141 | request); | |
142 | dev_dbg(&request->isci_host->pdev->dev, | |
143 | "%s: smp_req len = %d\n", | |
144 | __func__, | |
145 | task->smp_task.smp_req.length); | |
146 | ||
147 | /* copy the smp_command to the address; */ | |
148 | sg_copy_to_buffer(&task->smp_task.smp_req, 1, | |
149 | (char *)command_iu_address, | |
150 | sizeof(struct smp_request) | |
151 | ); | |
152 | ||
153 | status = scic_io_request_construct_smp(request->sci_request_handle); | |
154 | if (status != SCI_SUCCESS) | |
155 | dev_warn(&request->isci_host->pdev->dev, | |
156 | "%s: scic_io_request_construct_smp failed with " | |
157 | "status = %d\n", | |
158 | __func__, | |
159 | status); | |
160 | ||
161 | return status; | |
162 | } | |
163 | ||
164 | /** | |
165 | * isci_io_request_build() - This function builds the io request object. | |
166 | * @isci_host: This parameter specifies the ISCI host object | |
167 | * @request: This parameter points to the isci_request object allocated in the | |
168 | * request construct function. | |
169 | * @sci_device: This parameter is the handle for the sci core's remote device | |
170 | * object that is the destination for this request. | |
171 | * | |
172 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
173 | */ | |
174 | static enum sci_status isci_io_request_build( | |
175 | struct isci_host *isci_host, | |
176 | struct isci_request *request, | |
177 | struct isci_remote_device *isci_device) | |
178 | { | |
179 | struct smp_discover_response_protocols dev_protocols; | |
180 | enum sci_status status = SCI_SUCCESS; | |
181 | struct sas_task *task = isci_request_access_task(request); | |
182 | struct scic_sds_remote_device *sci_device = | |
183 | isci_device->sci_device_handle; | |
184 | ||
185 | dev_dbg(&isci_host->pdev->dev, | |
186 | "%s: isci_device = 0x%p; request = %p, " | |
187 | "num_scatter = %d\n", | |
188 | __func__, | |
189 | isci_device, | |
190 | request, | |
191 | task->num_scatter); | |
192 | ||
193 | /* map the sgl addresses, if present. | |
194 | * libata does the mapping for sata devices | |
195 | * before we get the request. | |
196 | */ | |
197 | if (task->num_scatter && | |
198 | !sas_protocol_ata(task->task_proto) && | |
199 | !(SAS_PROTOCOL_SMP & task->task_proto)) { | |
200 | ||
201 | request->num_sg_entries = dma_map_sg( | |
202 | &isci_host->pdev->dev, | |
203 | task->scatter, | |
204 | task->num_scatter, | |
205 | task->data_dir | |
206 | ); | |
207 | ||
208 | if (request->num_sg_entries == 0) | |
209 | return SCI_FAILURE_INSUFFICIENT_RESOURCES; | |
210 | } | |
211 | ||
212 | /* build the common request object. For now, | |
213 | * we will let the core allocate the IO tag. | |
214 | */ | |
215 | status = scic_io_request_construct( | |
216 | isci_host->core_controller, | |
217 | sci_device, | |
218 | SCI_CONTROLLER_INVALID_IO_TAG, | |
219 | request, | |
220 | request->sci_request_mem_ptr, | |
221 | (struct scic_sds_request **)&request->sci_request_handle | |
222 | ); | |
223 | ||
224 | if (status != SCI_SUCCESS) { | |
225 | dev_warn(&isci_host->pdev->dev, | |
226 | "%s: failed request construct\n", | |
227 | __func__); | |
228 | return SCI_FAILURE; | |
229 | } | |
230 | ||
231 | sci_object_set_association(request->sci_request_handle, request); | |
232 | ||
233 | /* Determine protocol and call the appropriate basic constructor */ | |
234 | scic_remote_device_get_protocols(sci_device, &dev_protocols); | |
235 | if (dev_protocols.u.bits.attached_ssp_target) | |
236 | status = isci_request_ssp_request_construct(request); | |
237 | else if (dev_protocols.u.bits.attached_stp_target) | |
238 | status = isci_request_stp_request_construct(request); | |
239 | else if (dev_protocols.u.bits.attached_smp_target) | |
240 | status = isci_smp_request_build(request); | |
241 | else { | |
242 | dev_warn(&isci_host->pdev->dev, | |
243 | "%s: unknown protocol\n", __func__); | |
244 | return SCI_FAILURE; | |
245 | } | |
246 | ||
247 | return SCI_SUCCESS; | |
248 | } | |
249 | ||
250 | ||
251 | /** | |
252 | * isci_request_alloc_core() - This function gets the request object from the | |
253 | * isci_host dma cache. | |
254 | * @isci_host: This parameter specifies the ISCI host object | |
255 | * @isci_request: This parameter will contain the pointer to the new | |
256 | * isci_request object. | |
257 | * @isci_device: This parameter is the pointer to the isci remote device object | |
258 | * that is the destination for this request. | |
259 | * @gfp_flags: This parameter specifies the os allocation flags. | |
260 | * | |
261 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
262 | */ | |
263 | static int isci_request_alloc_core( | |
264 | struct isci_host *isci_host, | |
265 | struct isci_request **isci_request, | |
266 | struct isci_remote_device *isci_device, | |
267 | gfp_t gfp_flags) | |
268 | { | |
269 | int ret = 0; | |
270 | dma_addr_t handle; | |
271 | struct isci_request *request; | |
272 | ||
273 | ||
274 | /* get pointer to dma memory. This actually points | |
275 | * to both the isci_remote_device object and the | |
276 | * sci object. The isci object is at the beginning | |
277 | * of the memory allocated here. | |
278 | */ | |
279 | request = dma_pool_alloc(isci_host->dma_pool, gfp_flags, &handle); | |
280 | if (!request) { | |
281 | dev_warn(&isci_host->pdev->dev, | |
282 | "%s: dma_pool_alloc returned NULL\n", __func__); | |
283 | return -ENOMEM; | |
284 | } | |
285 | ||
286 | /* initialize the request object. */ | |
287 | spin_lock_init(&request->state_lock); | |
288 | isci_request_change_state(request, allocated); | |
289 | request->sci_request_mem_ptr = ((u8 *)request) + | |
290 | sizeof(struct isci_request); | |
291 | request->request_daddr = handle; | |
292 | request->isci_host = isci_host; | |
293 | request->isci_device = isci_device; | |
294 | request->io_request_completion = NULL; | |
295 | ||
296 | request->request_alloc_size = isci_host->dma_pool_alloc_size; | |
297 | request->num_sg_entries = 0; | |
298 | ||
299 | request->complete_in_target = false; | |
300 | ||
301 | INIT_LIST_HEAD(&request->completed_node); | |
302 | INIT_LIST_HEAD(&request->dev_node); | |
303 | ||
304 | *isci_request = request; | |
305 | ||
306 | return ret; | |
307 | } | |
308 | ||
309 | static int isci_request_alloc_io( | |
310 | struct isci_host *isci_host, | |
311 | struct sas_task *task, | |
312 | struct isci_request **isci_request, | |
313 | struct isci_remote_device *isci_device, | |
314 | gfp_t gfp_flags) | |
315 | { | |
316 | int retval = isci_request_alloc_core(isci_host, isci_request, | |
317 | isci_device, gfp_flags); | |
318 | ||
319 | if (!retval) { | |
320 | (*isci_request)->ttype_ptr.io_task_ptr = task; | |
321 | (*isci_request)->ttype = io_task; | |
322 | ||
323 | task->lldd_task = *isci_request; | |
324 | } | |
325 | return retval; | |
326 | } | |
327 | ||
328 | /** | |
329 | * isci_request_alloc_tmf() - This function gets the request object from the | |
330 | * isci_host dma cache and initializes the relevant fields as a sas_task. | |
331 | * @isci_host: This parameter specifies the ISCI host object | |
332 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
333 | * @isci_request: This parameter will contain the pointer to the new | |
334 | * isci_request object. | |
335 | * @isci_device: This parameter is the pointer to the isci remote device object | |
336 | * that is the destination for this request. | |
337 | * @gfp_flags: This parameter specifies the os allocation flags. | |
338 | * | |
339 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
340 | */ | |
341 | int isci_request_alloc_tmf( | |
342 | struct isci_host *isci_host, | |
343 | struct isci_tmf *isci_tmf, | |
344 | struct isci_request **isci_request, | |
345 | struct isci_remote_device *isci_device, | |
346 | gfp_t gfp_flags) | |
347 | { | |
348 | int retval = isci_request_alloc_core(isci_host, isci_request, | |
349 | isci_device, gfp_flags); | |
350 | ||
351 | if (!retval) { | |
352 | ||
353 | (*isci_request)->ttype_ptr.tmf_task_ptr = isci_tmf; | |
354 | (*isci_request)->ttype = tmf_task; | |
355 | } | |
356 | return retval; | |
357 | } | |
358 | ||
359 | /** | |
360 | * isci_request_signal_device_reset() - This function will set the "device | |
361 | * needs target reset" flag in the given sas_tasks' task_state_flags, and | |
362 | * then cause the task to be added into the SCSI error handler queue which | |
363 | * will eventually be escalated to a target reset. | |
364 | * | |
365 | * | |
366 | */ | |
367 | static void isci_request_signal_device_reset( | |
368 | struct isci_request *isci_request) | |
369 | { | |
370 | unsigned long flags; | |
371 | struct sas_task *task = isci_request_access_task(isci_request); | |
372 | ||
373 | dev_dbg(&isci_request->isci_host->pdev->dev, | |
374 | "%s: request=%p, task=%p\n", __func__, isci_request, task); | |
375 | ||
376 | spin_lock_irqsave(&task->task_state_lock, flags); | |
377 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
378 | spin_unlock_irqrestore(&task->task_state_lock, flags); | |
379 | ||
380 | /* Cause this task to be scheduled in the SCSI error handler | |
381 | * thread. | |
382 | */ | |
383 | sas_task_abort(task); | |
384 | } | |
385 | ||
386 | /** | |
387 | * isci_request_execute() - This function allocates the isci_request object, | |
388 | * all fills in some common fields. | |
389 | * @isci_host: This parameter specifies the ISCI host object | |
390 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
391 | * @isci_request: This parameter will contain the pointer to the new | |
392 | * isci_request object. | |
393 | * @gfp_flags: This parameter specifies the os allocation flags. | |
394 | * | |
395 | * SCI_SUCCESS on successfull completion, or specific failure code. | |
396 | */ | |
397 | int isci_request_execute( | |
398 | struct isci_host *isci_host, | |
399 | struct sas_task *task, | |
400 | struct isci_request **isci_request, | |
401 | gfp_t gfp_flags) | |
402 | { | |
403 | int ret = 0; | |
404 | struct scic_sds_remote_device *sci_device; | |
405 | enum sci_status status = SCI_FAILURE_UNSUPPORTED_PROTOCOL; | |
406 | struct isci_remote_device *isci_device; | |
407 | struct isci_request *request; | |
408 | unsigned long flags; | |
409 | ||
410 | isci_device = isci_dev_from_domain_dev(task->dev); | |
411 | sci_device = isci_device->sci_device_handle; | |
412 | ||
413 | /* do common allocation and init of request object. */ | |
414 | ret = isci_request_alloc_io( | |
415 | isci_host, | |
416 | task, | |
417 | &request, | |
418 | isci_device, | |
419 | gfp_flags | |
420 | ); | |
421 | ||
422 | if (ret) | |
423 | goto out; | |
424 | ||
425 | status = isci_io_request_build(isci_host, request, isci_device); | |
426 | if (status == SCI_SUCCESS) { | |
427 | ||
428 | spin_lock_irqsave(&isci_host->scic_lock, flags); | |
429 | ||
430 | /* send the request, let the core assign the IO TAG. */ | |
431 | status = scic_controller_start_io( | |
432 | isci_host->core_controller, | |
433 | sci_device, | |
434 | request->sci_request_handle, | |
435 | SCI_CONTROLLER_INVALID_IO_TAG | |
436 | ); | |
437 | ||
438 | if (status == SCI_SUCCESS || | |
439 | status == SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { | |
440 | ||
441 | /* Either I/O started OK, or the core has signaled that | |
442 | * the device needs a target reset. | |
443 | * | |
444 | * In either case, hold onto the I/O for later. | |
445 | * | |
446 | * Update it's status and add it to the list in the | |
447 | * remote device object. | |
448 | */ | |
449 | isci_request_change_state(request, started); | |
450 | list_add(&request->dev_node, | |
451 | &isci_device->reqs_in_process); | |
452 | ||
453 | if (status == | |
454 | SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { | |
455 | /* Signal libsas that we need the SCSI error | |
456 | * handler thread to work on this I/O and that | |
457 | * we want a device reset. | |
458 | */ | |
459 | isci_request_signal_device_reset(request); | |
460 | ||
461 | /* Change the status, since we are holding | |
462 | * the I/O until it is managed by the SCSI | |
463 | * error handler. | |
464 | */ | |
465 | status = SCI_SUCCESS; | |
466 | } | |
467 | } else | |
468 | dev_warn(&isci_host->pdev->dev, | |
469 | "%s: failed request start\n", | |
470 | __func__); | |
471 | ||
472 | spin_unlock_irqrestore(&isci_host->scic_lock, flags); | |
473 | ||
474 | } else | |
475 | dev_warn(&isci_host->pdev->dev, | |
476 | "%s: request_construct failed - status = 0x%x\n", | |
477 | __func__, | |
478 | status); | |
479 | ||
480 | out: | |
481 | if (status != SCI_SUCCESS) { | |
482 | ||
483 | /* release dma memory on failure. */ | |
484 | isci_request_free(isci_host, request); | |
485 | request = NULL; | |
486 | ret = SCI_FAILURE; | |
487 | } | |
488 | ||
489 | *isci_request = request; | |
490 | return ret; | |
491 | } | |
492 | ||
493 | ||
494 | /** | |
495 | * isci_request_process_response_iu() - This function sets the status and | |
496 | * response iu, in the task struct, from the request object for the upper | |
497 | * layer driver. | |
498 | * @sas_task: This parameter is the task struct from the upper layer driver. | |
499 | * @resp_iu: This parameter points to the response iu of the completed request. | |
500 | * @dev: This parameter specifies the linux device struct. | |
501 | * | |
502 | * none. | |
503 | */ | |
504 | static void isci_request_process_response_iu( | |
505 | struct sas_task *task, | |
506 | struct ssp_response_iu *resp_iu, | |
507 | struct device *dev) | |
508 | { | |
509 | dev_dbg(dev, | |
510 | "%s: resp_iu = %p " | |
511 | "resp_iu->status = 0x%x,\nresp_iu->datapres = %d " | |
512 | "resp_iu->response_data_len = %x, " | |
513 | "resp_iu->sense_data_len = %x\nrepsonse data: ", | |
514 | __func__, | |
515 | resp_iu, | |
516 | resp_iu->status, | |
517 | resp_iu->datapres, | |
518 | resp_iu->response_data_len, | |
519 | resp_iu->sense_data_len); | |
520 | ||
521 | task->task_status.stat = resp_iu->status; | |
522 | ||
523 | /* libsas updates the task status fields based on the response iu. */ | |
524 | sas_ssp_task_response(dev, task, resp_iu); | |
525 | } | |
526 | ||
527 | /** | |
528 | * isci_request_set_open_reject_status() - This function prepares the I/O | |
529 | * completion for OPEN_REJECT conditions. | |
530 | * @request: This parameter is the completed isci_request object. | |
531 | * @response_ptr: This parameter specifies the service response for the I/O. | |
532 | * @status_ptr: This parameter specifies the exec status for the I/O. | |
533 | * @complete_to_host_ptr: This parameter specifies the action to be taken by | |
534 | * the LLDD with respect to completing this request or forcing an abort | |
535 | * condition on the I/O. | |
536 | * @open_rej_reason: This parameter specifies the encoded reason for the | |
537 | * abandon-class reject. | |
538 | * | |
539 | * none. | |
540 | */ | |
541 | static void isci_request_set_open_reject_status( | |
542 | struct isci_request *request, | |
543 | struct sas_task *task, | |
544 | enum service_response *response_ptr, | |
545 | enum exec_status *status_ptr, | |
546 | enum isci_completion_selection *complete_to_host_ptr, | |
547 | enum sas_open_rej_reason open_rej_reason) | |
548 | { | |
549 | /* Task in the target is done. */ | |
550 | request->complete_in_target = true; | |
551 | *response_ptr = SAS_TASK_UNDELIVERED; | |
552 | *status_ptr = SAS_OPEN_REJECT; | |
553 | *complete_to_host_ptr = isci_perform_normal_io_completion; | |
554 | task->task_status.open_rej_reason = open_rej_reason; | |
555 | } | |
556 | ||
557 | /** | |
558 | * isci_request_handle_controller_specific_errors() - This function decodes | |
559 | * controller-specific I/O completion error conditions. | |
560 | * @request: This parameter is the completed isci_request object. | |
561 | * @response_ptr: This parameter specifies the service response for the I/O. | |
562 | * @status_ptr: This parameter specifies the exec status for the I/O. | |
563 | * @complete_to_host_ptr: This parameter specifies the action to be taken by | |
564 | * the LLDD with respect to completing this request or forcing an abort | |
565 | * condition on the I/O. | |
566 | * | |
567 | * none. | |
568 | */ | |
569 | static void isci_request_handle_controller_specific_errors( | |
570 | struct isci_remote_device *isci_device, | |
571 | struct isci_request *request, | |
572 | struct sas_task *task, | |
573 | enum service_response *response_ptr, | |
574 | enum exec_status *status_ptr, | |
575 | enum isci_completion_selection *complete_to_host_ptr) | |
576 | { | |
577 | unsigned int cstatus; | |
578 | ||
579 | cstatus = scic_request_get_controller_status( | |
580 | request->sci_request_handle | |
581 | ); | |
582 | ||
583 | dev_dbg(&request->isci_host->pdev->dev, | |
584 | "%s: %p SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR " | |
585 | "- controller status = 0x%x\n", | |
586 | __func__, request, cstatus); | |
587 | ||
588 | /* Decode the controller-specific errors; most | |
589 | * important is to recognize those conditions in which | |
590 | * the target may still have a task outstanding that | |
591 | * must be aborted. | |
592 | * | |
593 | * Note that there are SCU completion codes being | |
594 | * named in the decode below for which SCIC has already | |
595 | * done work to handle them in a way other than as | |
596 | * a controller-specific completion code; these are left | |
597 | * in the decode below for completeness sake. | |
598 | */ | |
599 | switch (cstatus) { | |
600 | case SCU_TASK_DONE_DMASETUP_DIRERR: | |
601 | /* Also SCU_TASK_DONE_SMP_FRM_TYPE_ERR: */ | |
602 | case SCU_TASK_DONE_XFERCNT_ERR: | |
603 | /* Also SCU_TASK_DONE_SMP_UFI_ERR: */ | |
604 | if (task->task_proto == SAS_PROTOCOL_SMP) { | |
605 | /* SCU_TASK_DONE_SMP_UFI_ERR == Task Done. */ | |
606 | *response_ptr = SAS_TASK_COMPLETE; | |
607 | ||
608 | /* See if the device has been/is being stopped. Note | |
609 | * that we ignore the quiesce state, since we are | |
610 | * concerned about the actual device state. | |
611 | */ | |
612 | if ((isci_device->status == isci_stopping) || | |
613 | (isci_device->status == isci_stopped)) | |
614 | *status_ptr = SAS_DEVICE_UNKNOWN; | |
615 | else | |
616 | *status_ptr = SAS_ABORTED_TASK; | |
617 | ||
618 | request->complete_in_target = true; | |
619 | ||
620 | *complete_to_host_ptr = | |
621 | isci_perform_normal_io_completion; | |
622 | } else { | |
623 | /* Task in the target is not done. */ | |
624 | *response_ptr = SAS_TASK_UNDELIVERED; | |
625 | ||
626 | if ((isci_device->status == isci_stopping) || | |
627 | (isci_device->status == isci_stopped)) | |
628 | *status_ptr = SAS_DEVICE_UNKNOWN; | |
629 | else | |
630 | *status_ptr = SAM_STAT_TASK_ABORTED; | |
631 | ||
632 | request->complete_in_target = false; | |
633 | ||
634 | *complete_to_host_ptr = | |
635 | isci_perform_error_io_completion; | |
636 | } | |
637 | ||
638 | break; | |
639 | ||
640 | case SCU_TASK_DONE_CRC_ERR: | |
641 | case SCU_TASK_DONE_NAK_CMD_ERR: | |
642 | case SCU_TASK_DONE_EXCESS_DATA: | |
643 | case SCU_TASK_DONE_UNEXP_FIS: | |
644 | /* Also SCU_TASK_DONE_UNEXP_RESP: */ | |
645 | case SCU_TASK_DONE_VIIT_ENTRY_NV: /* TODO - conditions? */ | |
646 | case SCU_TASK_DONE_IIT_ENTRY_NV: /* TODO - conditions? */ | |
647 | case SCU_TASK_DONE_RNCNV_OUTBOUND: /* TODO - conditions? */ | |
648 | /* These are conditions in which the target | |
649 | * has completed the task, so that no cleanup | |
650 | * is necessary. | |
651 | */ | |
652 | *response_ptr = SAS_TASK_COMPLETE; | |
653 | ||
654 | /* See if the device has been/is being stopped. Note | |
655 | * that we ignore the quiesce state, since we are | |
656 | * concerned about the actual device state. | |
657 | */ | |
658 | if ((isci_device->status == isci_stopping) || | |
659 | (isci_device->status == isci_stopped)) | |
660 | *status_ptr = SAS_DEVICE_UNKNOWN; | |
661 | else | |
662 | *status_ptr = SAS_ABORTED_TASK; | |
663 | ||
664 | request->complete_in_target = true; | |
665 | ||
666 | *complete_to_host_ptr = isci_perform_normal_io_completion; | |
667 | break; | |
668 | ||
669 | ||
670 | /* Note that the only open reject completion codes seen here will be | |
671 | * abandon-class codes; all others are automatically retried in the SCU. | |
672 | */ | |
673 | case SCU_TASK_OPEN_REJECT_WRONG_DESTINATION: | |
674 | ||
675 | isci_request_set_open_reject_status( | |
676 | request, task, response_ptr, status_ptr, | |
677 | complete_to_host_ptr, SAS_OREJ_WRONG_DEST); | |
678 | break; | |
679 | ||
680 | case SCU_TASK_OPEN_REJECT_ZONE_VIOLATION: | |
681 | ||
682 | /* Note - the return of AB0 will change when | |
683 | * libsas implements detection of zone violations. | |
684 | */ | |
685 | isci_request_set_open_reject_status( | |
686 | request, task, response_ptr, status_ptr, | |
687 | complete_to_host_ptr, SAS_OREJ_RESV_AB0); | |
688 | break; | |
689 | ||
690 | case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_1: | |
691 | ||
692 | isci_request_set_open_reject_status( | |
693 | request, task, response_ptr, status_ptr, | |
694 | complete_to_host_ptr, SAS_OREJ_RESV_AB1); | |
695 | break; | |
696 | ||
697 | case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_2: | |
698 | ||
699 | isci_request_set_open_reject_status( | |
700 | request, task, response_ptr, status_ptr, | |
701 | complete_to_host_ptr, SAS_OREJ_RESV_AB2); | |
702 | break; | |
703 | ||
704 | case SCU_TASK_OPEN_REJECT_RESERVED_ABANDON_3: | |
705 | ||
706 | isci_request_set_open_reject_status( | |
707 | request, task, response_ptr, status_ptr, | |
708 | complete_to_host_ptr, SAS_OREJ_RESV_AB3); | |
709 | break; | |
710 | ||
711 | case SCU_TASK_OPEN_REJECT_BAD_DESTINATION: | |
712 | ||
713 | isci_request_set_open_reject_status( | |
714 | request, task, response_ptr, status_ptr, | |
715 | complete_to_host_ptr, SAS_OREJ_BAD_DEST); | |
716 | break; | |
717 | ||
718 | case SCU_TASK_OPEN_REJECT_STP_RESOURCES_BUSY: | |
719 | ||
720 | isci_request_set_open_reject_status( | |
721 | request, task, response_ptr, status_ptr, | |
722 | complete_to_host_ptr, SAS_OREJ_STP_NORES); | |
723 | break; | |
724 | ||
725 | case SCU_TASK_OPEN_REJECT_PROTOCOL_NOT_SUPPORTED: | |
726 | ||
727 | isci_request_set_open_reject_status( | |
728 | request, task, response_ptr, status_ptr, | |
729 | complete_to_host_ptr, SAS_OREJ_EPROTO); | |
730 | break; | |
731 | ||
732 | case SCU_TASK_OPEN_REJECT_CONNECTION_RATE_NOT_SUPPORTED: | |
733 | ||
734 | isci_request_set_open_reject_status( | |
735 | request, task, response_ptr, status_ptr, | |
736 | complete_to_host_ptr, SAS_OREJ_CONN_RATE); | |
737 | break; | |
738 | ||
739 | case SCU_TASK_DONE_LL_R_ERR: | |
740 | /* Also SCU_TASK_DONE_ACK_NAK_TO: */ | |
741 | case SCU_TASK_DONE_LL_PERR: | |
742 | case SCU_TASK_DONE_LL_SY_TERM: | |
743 | /* Also SCU_TASK_DONE_NAK_ERR:*/ | |
744 | case SCU_TASK_DONE_LL_LF_TERM: | |
745 | /* Also SCU_TASK_DONE_DATA_LEN_ERR: */ | |
746 | case SCU_TASK_DONE_LL_ABORT_ERR: | |
747 | case SCU_TASK_DONE_SEQ_INV_TYPE: | |
748 | /* Also SCU_TASK_DONE_UNEXP_XR: */ | |
749 | case SCU_TASK_DONE_XR_IU_LEN_ERR: | |
750 | case SCU_TASK_DONE_INV_FIS_LEN: | |
751 | /* Also SCU_TASK_DONE_XR_WD_LEN: */ | |
752 | case SCU_TASK_DONE_SDMA_ERR: | |
753 | case SCU_TASK_DONE_OFFSET_ERR: | |
754 | case SCU_TASK_DONE_MAX_PLD_ERR: | |
755 | case SCU_TASK_DONE_LF_ERR: | |
756 | case SCU_TASK_DONE_SMP_RESP_TO_ERR: /* Escalate to dev reset? */ | |
757 | case SCU_TASK_DONE_SMP_LL_RX_ERR: | |
758 | case SCU_TASK_DONE_UNEXP_DATA: | |
759 | case SCU_TASK_DONE_UNEXP_SDBFIS: | |
760 | case SCU_TASK_DONE_REG_ERR: | |
761 | case SCU_TASK_DONE_SDB_ERR: | |
762 | case SCU_TASK_DONE_TASK_ABORT: | |
763 | default: | |
764 | /* Task in the target is not done. */ | |
765 | *response_ptr = SAS_TASK_UNDELIVERED; | |
766 | *status_ptr = SAM_STAT_TASK_ABORTED; | |
767 | request->complete_in_target = false; | |
768 | ||
769 | *complete_to_host_ptr = isci_perform_error_io_completion; | |
770 | break; | |
771 | } | |
772 | } | |
773 | ||
774 | /** | |
775 | * isci_task_save_for_upper_layer_completion() - This function saves the | |
776 | * request for later completion to the upper layer driver. | |
777 | * @host: This parameter is a pointer to the host on which the the request | |
778 | * should be queued (either as an error or success). | |
779 | * @request: This parameter is the completed request. | |
780 | * @response: This parameter is the response code for the completed task. | |
781 | * @status: This parameter is the status code for the completed task. | |
782 | * | |
783 | * none. | |
784 | */ | |
785 | static void isci_task_save_for_upper_layer_completion( | |
786 | struct isci_host *host, | |
787 | struct isci_request *request, | |
788 | enum service_response response, | |
789 | enum exec_status status, | |
790 | enum isci_completion_selection task_notification_selection) | |
791 | { | |
792 | struct sas_task *task = isci_request_access_task(request); | |
793 | ||
794 | isci_task_set_completion_status(task, response, status, | |
795 | task_notification_selection); | |
796 | ||
797 | ||
798 | /* Tasks aborted specifically by a call to the lldd_abort_task | |
799 | * function should not be completed to the host in the regular path. | |
800 | */ | |
801 | switch (task_notification_selection) { | |
802 | ||
803 | case isci_perform_normal_io_completion: | |
804 | ||
805 | /* Normal notification (task_done) */ | |
806 | dev_dbg(&host->pdev->dev, | |
807 | "%s: Normal - task = %p, response=%d, status=%d\n", | |
808 | __func__, | |
809 | task, | |
810 | response, | |
811 | status); | |
812 | /* Add to the completed list. */ | |
813 | list_add(&request->completed_node, | |
814 | &host->requests_to_complete); | |
815 | break; | |
816 | ||
817 | case isci_perform_aborted_io_completion: | |
818 | /* | |
819 | * No notification because this request is already | |
820 | * in the abort path. | |
821 | */ | |
822 | dev_warn(&host->pdev->dev, | |
823 | "%s: Aborted - task = %p, response=%d, status=%d\n", | |
824 | __func__, | |
825 | task, | |
826 | response, | |
827 | status); | |
828 | break; | |
829 | ||
830 | case isci_perform_error_io_completion: | |
831 | /* Use sas_task_abort */ | |
832 | dev_warn(&host->pdev->dev, | |
833 | "%s: Error - task = %p, response=%d, status=%d\n", | |
834 | __func__, | |
835 | task, | |
836 | response, | |
837 | status); | |
838 | /* Add to the aborted list. */ | |
839 | list_add(&request->completed_node, | |
840 | &host->requests_to_abort); | |
841 | break; | |
842 | ||
843 | default: | |
844 | dev_warn(&host->pdev->dev, | |
845 | "%s: Unknown - task = %p, response=%d, status=%d\n", | |
846 | __func__, | |
847 | task, | |
848 | response, | |
849 | status); | |
850 | ||
851 | /* Add to the aborted list. */ | |
852 | list_add(&request->completed_node, | |
853 | &host->requests_to_abort); | |
854 | break; | |
855 | } | |
856 | } | |
857 | ||
858 | /** | |
859 | * isci_request_io_request_complete() - This function is called by the sci core | |
860 | * when an io request completes. | |
861 | * @isci_host: This parameter specifies the ISCI host object | |
862 | * @request: This parameter is the completed isci_request object. | |
863 | * @completion_status: This parameter specifies the completion status from the | |
864 | * sci core. | |
865 | * | |
866 | * none. | |
867 | */ | |
868 | void isci_request_io_request_complete( | |
869 | struct isci_host *isci_host, | |
870 | struct isci_request *request, | |
871 | enum sci_io_status completion_status) | |
872 | { | |
873 | struct sas_task *task = isci_request_access_task(request); | |
874 | struct ssp_response_iu *resp_iu; | |
875 | void *resp_buf; | |
876 | unsigned long task_flags; | |
877 | unsigned long state_flags; | |
878 | struct completion *io_request_completion; | |
879 | struct isci_remote_device *isci_device = request->isci_device; | |
880 | enum service_response response = SAS_TASK_UNDELIVERED; | |
881 | enum exec_status status = SAS_ABORTED_TASK; | |
882 | enum isci_request_status request_status; | |
883 | enum isci_completion_selection complete_to_host | |
884 | = isci_perform_normal_io_completion; | |
885 | ||
886 | dev_dbg(&isci_host->pdev->dev, | |
887 | "%s: request = %p, task = %p,\n" | |
888 | "task->data_dir = %d completion_status = 0x%x\n", | |
889 | __func__, | |
890 | request, | |
891 | task, | |
892 | task->data_dir, | |
893 | completion_status); | |
894 | ||
895 | spin_lock_irqsave(&request->state_lock, state_flags); | |
896 | request_status = isci_request_get_state(request); | |
897 | spin_unlock_irqrestore(&request->state_lock, state_flags); | |
898 | ||
899 | /* Decode the request status. Note that if the request has been | |
900 | * aborted by a task management function, we don't care | |
901 | * what the status is. | |
902 | */ | |
903 | switch (request_status) { | |
904 | ||
905 | case aborted: | |
906 | /* "aborted" indicates that the request was aborted by a task | |
907 | * management function, since once a task management request is | |
908 | * perfomed by the device, the request only completes because | |
909 | * of the subsequent driver terminate. | |
910 | * | |
911 | * Aborted also means an external thread is explicitly managing | |
912 | * this request, so that we do not complete it up the stack. | |
913 | * | |
914 | * The target is still there (since the TMF was successful). | |
915 | */ | |
916 | request->complete_in_target = true; | |
917 | response = SAS_TASK_COMPLETE; | |
918 | ||
919 | /* See if the device has been/is being stopped. Note | |
920 | * that we ignore the quiesce state, since we are | |
921 | * concerned about the actual device state. | |
922 | */ | |
923 | if ((isci_device->status == isci_stopping) | |
924 | || (isci_device->status == isci_stopped) | |
925 | ) | |
926 | status = SAS_DEVICE_UNKNOWN; | |
927 | else | |
928 | status = SAS_ABORTED_TASK; | |
929 | ||
930 | complete_to_host = isci_perform_aborted_io_completion; | |
931 | /* This was an aborted request. */ | |
932 | break; | |
933 | ||
934 | case aborting: | |
935 | /* aborting means that the task management function tried and | |
936 | * failed to abort the request. We need to note the request | |
937 | * as SAS_TASK_UNDELIVERED, so that the scsi mid layer marks the | |
938 | * target as down. | |
939 | * | |
940 | * Aborting also means an external thread is explicitly managing | |
941 | * this request, so that we do not complete it up the stack. | |
942 | */ | |
943 | request->complete_in_target = true; | |
944 | response = SAS_TASK_UNDELIVERED; | |
945 | ||
946 | if ((isci_device->status == isci_stopping) || | |
947 | (isci_device->status == isci_stopped)) | |
948 | /* The device has been /is being stopped. Note that | |
949 | * we ignore the quiesce state, since we are | |
950 | * concerned about the actual device state. | |
951 | */ | |
952 | status = SAS_DEVICE_UNKNOWN; | |
953 | else | |
954 | status = SAS_PHY_DOWN; | |
955 | ||
956 | complete_to_host = isci_perform_aborted_io_completion; | |
957 | ||
958 | /* This was an aborted request. */ | |
959 | break; | |
960 | ||
961 | case terminating: | |
962 | ||
963 | /* This was an terminated request. This happens when | |
964 | * the I/O is being terminated because of an action on | |
965 | * the device (reset, tear down, etc.), and the I/O needs | |
966 | * to be completed up the stack. | |
967 | */ | |
968 | request->complete_in_target = true; | |
969 | response = SAS_TASK_UNDELIVERED; | |
970 | ||
971 | /* See if the device has been/is being stopped. Note | |
972 | * that we ignore the quiesce state, since we are | |
973 | * concerned about the actual device state. | |
974 | */ | |
975 | if ((isci_device->status == isci_stopping) || | |
976 | (isci_device->status == isci_stopped)) | |
977 | status = SAS_DEVICE_UNKNOWN; | |
978 | else | |
979 | status = SAS_ABORTED_TASK; | |
980 | ||
981 | complete_to_host = isci_perform_normal_io_completion; | |
982 | ||
983 | /* This was a terminated request. */ | |
984 | break; | |
985 | ||
986 | default: | |
987 | ||
988 | /* This is an active request being completed from the core. */ | |
989 | switch (completion_status) { | |
990 | ||
991 | case SCI_IO_FAILURE_RESPONSE_VALID: | |
992 | dev_dbg(&isci_host->pdev->dev, | |
993 | "%s: SCI_IO_FAILURE_RESPONSE_VALID (%p/%p)\n", | |
994 | __func__, | |
995 | request, | |
996 | task); | |
997 | ||
998 | if (sas_protocol_ata(task->task_proto)) { | |
999 | resp_buf | |
1000 | = scic_stp_io_request_get_d2h_reg_address( | |
1001 | request->sci_request_handle | |
1002 | ); | |
1003 | isci_request_process_stp_response(task, | |
1004 | resp_buf | |
1005 | ); | |
1006 | ||
1007 | } else if (SAS_PROTOCOL_SSP == task->task_proto) { | |
1008 | ||
1009 | /* crack the iu response buffer. */ | |
1010 | resp_iu | |
1011 | = scic_io_request_get_response_iu_address( | |
1012 | request->sci_request_handle | |
1013 | ); | |
1014 | ||
1015 | isci_request_process_response_iu(task, resp_iu, | |
1016 | &isci_host->pdev->dev | |
1017 | ); | |
1018 | ||
1019 | } else if (SAS_PROTOCOL_SMP == task->task_proto) { | |
1020 | ||
1021 | dev_err(&isci_host->pdev->dev, | |
1022 | "%s: SCI_IO_FAILURE_RESPONSE_VALID: " | |
1023 | "SAS_PROTOCOL_SMP protocol\n", | |
1024 | __func__); | |
1025 | ||
1026 | } else | |
1027 | dev_err(&isci_host->pdev->dev, | |
1028 | "%s: unknown protocol\n", __func__); | |
1029 | ||
1030 | /* use the task status set in the task struct by the | |
1031 | * isci_request_process_response_iu call. | |
1032 | */ | |
1033 | request->complete_in_target = true; | |
1034 | response = task->task_status.resp; | |
1035 | status = task->task_status.stat; | |
1036 | break; | |
1037 | ||
1038 | case SCI_IO_SUCCESS: | |
1039 | case SCI_IO_SUCCESS_IO_DONE_EARLY: | |
1040 | ||
1041 | response = SAS_TASK_COMPLETE; | |
1042 | status = SAM_STAT_GOOD; | |
1043 | request->complete_in_target = true; | |
1044 | ||
1045 | if (task->task_proto == SAS_PROTOCOL_SMP) { | |
1046 | ||
1047 | u8 *command_iu_address | |
1048 | = scic_io_request_get_command_iu_address( | |
1049 | request->sci_request_handle | |
1050 | ); | |
1051 | ||
1052 | dev_dbg(&isci_host->pdev->dev, | |
1053 | "%s: SMP protocol completion\n", | |
1054 | __func__); | |
1055 | ||
1056 | sg_copy_from_buffer( | |
1057 | &task->smp_task.smp_resp, 1, | |
1058 | command_iu_address | |
1059 | + sizeof(struct smp_request), | |
1060 | sizeof(struct smp_resp) | |
1061 | ); | |
1062 | } else if (completion_status | |
1063 | == SCI_IO_SUCCESS_IO_DONE_EARLY) { | |
1064 | ||
1065 | /* This was an SSP / STP / SATA transfer. | |
1066 | * There is a possibility that less data than | |
1067 | * the maximum was transferred. | |
1068 | */ | |
1069 | u32 transferred_length | |
1070 | = scic_io_request_get_number_of_bytes_transferred( | |
1071 | request->sci_request_handle); | |
1072 | ||
1073 | task->task_status.residual | |
1074 | = task->total_xfer_len - transferred_length; | |
1075 | ||
1076 | /* If there were residual bytes, call this an | |
1077 | * underrun. | |
1078 | */ | |
1079 | if (task->task_status.residual != 0) | |
1080 | status = SAS_DATA_UNDERRUN; | |
1081 | ||
1082 | dev_dbg(&isci_host->pdev->dev, | |
1083 | "%s: SCI_IO_SUCCESS_IO_DONE_EARLY %d\n", | |
1084 | __func__, | |
1085 | status); | |
1086 | ||
1087 | } else | |
1088 | dev_dbg(&isci_host->pdev->dev, | |
1089 | "%s: SCI_IO_SUCCESS\n", | |
1090 | __func__); | |
1091 | ||
1092 | break; | |
1093 | ||
1094 | case SCI_IO_FAILURE_TERMINATED: | |
1095 | dev_dbg(&isci_host->pdev->dev, | |
1096 | "%s: SCI_IO_FAILURE_TERMINATED (%p/%p)\n", | |
1097 | __func__, | |
1098 | request, | |
1099 | task); | |
1100 | ||
1101 | /* The request was terminated explicitly. No handling | |
1102 | * is needed in the SCSI error handler path. | |
1103 | */ | |
1104 | request->complete_in_target = true; | |
1105 | response = SAS_TASK_UNDELIVERED; | |
1106 | ||
1107 | /* See if the device has been/is being stopped. Note | |
1108 | * that we ignore the quiesce state, since we are | |
1109 | * concerned about the actual device state. | |
1110 | */ | |
1111 | if ((isci_device->status == isci_stopping) || | |
1112 | (isci_device->status == isci_stopped)) | |
1113 | status = SAS_DEVICE_UNKNOWN; | |
1114 | else | |
1115 | status = SAS_ABORTED_TASK; | |
1116 | ||
1117 | complete_to_host = isci_perform_normal_io_completion; | |
1118 | break; | |
1119 | ||
1120 | case SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR: | |
1121 | ||
1122 | isci_request_handle_controller_specific_errors( | |
1123 | isci_device, request, task, &response, &status, | |
1124 | &complete_to_host); | |
1125 | ||
1126 | break; | |
1127 | ||
1128 | case SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED: | |
1129 | /* This is a special case, in that the I/O completion | |
1130 | * is telling us that the device needs a reset. | |
1131 | * In order for the device reset condition to be | |
1132 | * noticed, the I/O has to be handled in the error | |
1133 | * handler. Set the reset flag and cause the | |
1134 | * SCSI error thread to be scheduled. | |
1135 | */ | |
1136 | spin_lock_irqsave(&task->task_state_lock, task_flags); | |
1137 | task->task_state_flags |= SAS_TASK_NEED_DEV_RESET; | |
1138 | spin_unlock_irqrestore(&task->task_state_lock, task_flags); | |
1139 | ||
1140 | complete_to_host = isci_perform_error_io_completion; | |
1141 | request->complete_in_target = false; | |
1142 | break; | |
1143 | ||
1144 | default: | |
1145 | /* Catch any otherwise unhandled error codes here. */ | |
1146 | dev_warn(&isci_host->pdev->dev, | |
1147 | "%s: invalid completion code: 0x%x - " | |
1148 | "isci_request = %p\n", | |
1149 | __func__, completion_status, request); | |
1150 | ||
1151 | response = SAS_TASK_UNDELIVERED; | |
1152 | ||
1153 | /* See if the device has been/is being stopped. Note | |
1154 | * that we ignore the quiesce state, since we are | |
1155 | * concerned about the actual device state. | |
1156 | */ | |
1157 | if ((isci_device->status == isci_stopping) || | |
1158 | (isci_device->status == isci_stopped)) | |
1159 | status = SAS_DEVICE_UNKNOWN; | |
1160 | else | |
1161 | status = SAS_ABORTED_TASK; | |
1162 | ||
1163 | complete_to_host = isci_perform_error_io_completion; | |
1164 | request->complete_in_target = false; | |
1165 | break; | |
1166 | } | |
1167 | break; | |
1168 | } | |
1169 | ||
1170 | isci_request_unmap_sgl(request, isci_host->pdev); | |
1171 | ||
1172 | /* Put the completed request on the correct list */ | |
1173 | isci_task_save_for_upper_layer_completion(isci_host, request, response, | |
1174 | status, complete_to_host | |
1175 | ); | |
1176 | ||
1177 | /* complete the io request to the core. */ | |
1178 | scic_controller_complete_io( | |
1179 | isci_host->core_controller, | |
1180 | isci_device->sci_device_handle, | |
1181 | request->sci_request_handle | |
1182 | ); | |
1183 | /* NULL the request handle so it cannot be completed or | |
1184 | * terminated again, and to cause any calls into abort | |
1185 | * task to recognize the already completed case. | |
1186 | */ | |
1187 | request->sci_request_handle = NULL; | |
1188 | ||
1189 | /* Only remove the request from the remote device list | |
1190 | * of pending requests if we have not requested error | |
1191 | * handling on this request. | |
1192 | */ | |
1193 | if (complete_to_host != isci_perform_error_io_completion) | |
1194 | list_del_init(&request->dev_node); | |
1195 | ||
1196 | ||
1197 | /* Save possible completion ptr. */ | |
1198 | io_request_completion = request->io_request_completion; | |
1199 | ||
1200 | if (io_request_completion) { | |
1201 | ||
1202 | /* This is inherantly a regular I/O request, | |
1203 | * since we are currently in the regular | |
1204 | * I/O completion callback function. | |
1205 | * Signal whoever is waiting that this | |
1206 | * request is complete. | |
1207 | */ | |
1208 | complete(io_request_completion); | |
1209 | } | |
1210 | ||
1211 | isci_host_can_dequeue(isci_host, 1); | |
1212 | } | |
1213 | ||
1214 | /** | |
1215 | * isci_request_io_request_get_transfer_length() - This function is called by | |
1216 | * the sci core to retrieve the transfer length for a given request. | |
1217 | * @request: This parameter is the isci_request object. | |
1218 | * | |
1219 | * length of transfer for specified request. | |
1220 | */ | |
1221 | u32 isci_request_io_request_get_transfer_length(struct isci_request *request) | |
1222 | { | |
1223 | struct sas_task *task = isci_request_access_task(request); | |
1224 | ||
1225 | dev_dbg(&request->isci_host->pdev->dev, | |
1226 | "%s: total_xfer_len: %d\n", | |
1227 | __func__, | |
1228 | task->total_xfer_len); | |
1229 | return task->total_xfer_len; | |
1230 | } | |
1231 | ||
1232 | ||
1233 | /** | |
1234 | * isci_request_io_request_get_data_direction() - This function is called by | |
1235 | * the sci core to retrieve the data direction for a given request. | |
1236 | * @request: This parameter is the isci_request object. | |
1237 | * | |
1238 | * data direction for specified request. | |
1239 | */ | |
1240 | SCI_IO_REQUEST_DATA_DIRECTION isci_request_io_request_get_data_direction( | |
1241 | struct isci_request *request) | |
1242 | { | |
1243 | struct sas_task *task = isci_request_access_task(request); | |
1244 | SCI_IO_REQUEST_DATA_DIRECTION ret; | |
1245 | ||
1246 | switch (task->data_dir) { | |
1247 | ||
1248 | case DMA_FROM_DEVICE: | |
1249 | ret = SCI_IO_REQUEST_DATA_IN; | |
1250 | dev_dbg(&request->isci_host->pdev->dev, | |
1251 | "%s: request=%p, FROM_DEVICE\n", | |
1252 | __func__, | |
1253 | request); | |
1254 | break; | |
1255 | ||
1256 | case DMA_TO_DEVICE: | |
1257 | ret = SCI_IO_REQUEST_DATA_OUT; | |
1258 | dev_dbg(&request->isci_host->pdev->dev, | |
1259 | "%s: request=%p, TO_DEVICE\n", | |
1260 | __func__, | |
1261 | request); | |
1262 | break; | |
1263 | ||
1264 | case DMA_BIDIRECTIONAL: | |
1265 | case DMA_NONE: | |
1266 | default: | |
1267 | ret = SCI_IO_REQUEST_NO_DATA; | |
1268 | dev_dbg(&request->isci_host->pdev->dev, | |
1269 | "%s: request=%p, unhandled direction case, " | |
1270 | "data_dir=%d\n", | |
1271 | __func__, | |
1272 | request, | |
1273 | task->data_dir); | |
1274 | break; | |
1275 | ||
1276 | } | |
1277 | return ret; | |
1278 | } | |
1279 | ||
1280 | /** | |
1281 | * isci_request_sge_get_address_field() - This function is called by the sci | |
1282 | * core to retrieve the address field contents for a given sge. | |
1283 | * @request: This parameter is the isci_request object. | |
1284 | * @sge_address: This parameter is the sge. | |
1285 | * | |
1286 | * physical address in the specified sge. | |
1287 | */ | |
1288 | dma_addr_t isci_request_sge_get_address_field( | |
1289 | struct isci_request *request, | |
1290 | void *sge_address) | |
1291 | { | |
1292 | struct sas_task *task = isci_request_access_task(request); | |
1293 | dma_addr_t ret; | |
1294 | struct isci_host *isci_host = isci_host_from_sas_ha( | |
1295 | task->dev->port->ha); | |
1296 | ||
1297 | dev_dbg(&isci_host->pdev->dev, | |
1298 | "%s: request = %p, sge_address = %p\n", | |
1299 | __func__, | |
1300 | request, | |
1301 | sge_address); | |
1302 | ||
1303 | if (task->data_dir == PCI_DMA_NONE) | |
1304 | return 0; | |
1305 | ||
1306 | /* the case where num_scatter == 0 is special, in that | |
1307 | * task->scatter is the actual buffer address, not an sgl. | |
1308 | * so a map single is required here. | |
1309 | */ | |
1310 | if ((task->num_scatter == 0) && | |
1311 | !sas_protocol_ata(task->task_proto)) { | |
1312 | ret = dma_map_single( | |
1313 | &isci_host->pdev->dev, | |
1314 | task->scatter, | |
1315 | task->total_xfer_len, | |
1316 | task->data_dir | |
1317 | ); | |
1318 | request->zero_scatter_daddr = ret; | |
1319 | } else | |
1320 | ret = sg_dma_address(((struct scatterlist *)sge_address)); | |
1321 | ||
1322 | dev_dbg(&isci_host->pdev->dev, | |
1323 | "%s: bus address = %lx\n", | |
1324 | __func__, | |
1325 | (unsigned long)ret); | |
1326 | ||
1327 | return ret; | |
1328 | } | |
1329 | ||
1330 | ||
1331 | /** | |
1332 | * isci_request_sge_get_length_field() - This function is called by the sci | |
1333 | * core to retrieve the length field contents for a given sge. | |
1334 | * @request: This parameter is the isci_request object. | |
1335 | * @sge_address: This parameter is the sge. | |
1336 | * | |
1337 | * length field value in the specified sge. | |
1338 | */ | |
1339 | u32 isci_request_sge_get_length_field( | |
1340 | struct isci_request *request, | |
1341 | void *sge_address) | |
1342 | { | |
1343 | struct sas_task *task = isci_request_access_task(request); | |
1344 | int ret; | |
1345 | ||
1346 | dev_dbg(&request->isci_host->pdev->dev, | |
1347 | "%s: request = %p, sge_address = %p\n", | |
1348 | __func__, | |
1349 | request, | |
1350 | sge_address); | |
1351 | ||
1352 | if (task->data_dir == PCI_DMA_NONE) | |
1353 | return 0; | |
1354 | ||
1355 | /* the case where num_scatter == 0 is special, in that | |
1356 | * task->scatter is the actual buffer address, not an sgl. | |
1357 | * so we return total_xfer_len here. | |
1358 | */ | |
1359 | if (task->num_scatter == 0) | |
1360 | ret = task->total_xfer_len; | |
1361 | else | |
1362 | ret = sg_dma_len((struct scatterlist *)sge_address); | |
1363 | ||
1364 | dev_dbg(&request->isci_host->pdev->dev, | |
1365 | "%s: len = %d\n", | |
1366 | __func__, | |
1367 | ret); | |
1368 | ||
1369 | return ret; | |
1370 | } | |
1371 | ||
1372 | ||
1373 | /** | |
1374 | * isci_request_ssp_io_request_get_cdb_address() - This function is called by | |
1375 | * the sci core to retrieve the cdb address for a given request. | |
1376 | * @request: This parameter is the isci_request object. | |
1377 | * | |
1378 | * cdb address for specified request. | |
1379 | */ | |
1380 | void *isci_request_ssp_io_request_get_cdb_address( | |
1381 | struct isci_request *request) | |
1382 | { | |
1383 | struct sas_task *task = isci_request_access_task(request); | |
1384 | ||
1385 | dev_dbg(&request->isci_host->pdev->dev, | |
1386 | "%s: request->task->ssp_task.cdb = %p\n", | |
1387 | __func__, | |
1388 | task->ssp_task.cdb); | |
1389 | return task->ssp_task.cdb; | |
1390 | } | |
1391 | ||
1392 | ||
1393 | /** | |
1394 | * isci_request_ssp_io_request_get_cdb_length() - This function is called by | |
1395 | * the sci core to retrieve the cdb length for a given request. | |
1396 | * @request: This parameter is the isci_request object. | |
1397 | * | |
1398 | * cdb length for specified request. | |
1399 | */ | |
1400 | u32 isci_request_ssp_io_request_get_cdb_length( | |
1401 | struct isci_request *request) | |
1402 | { | |
1403 | return 16; | |
1404 | } | |
1405 | ||
1406 | ||
1407 | /** | |
1408 | * isci_request_ssp_io_request_get_lun() - This function is called by the sci | |
1409 | * core to retrieve the lun for a given request. | |
1410 | * @request: This parameter is the isci_request object. | |
1411 | * | |
1412 | * lun for specified request. | |
1413 | */ | |
1414 | u32 isci_request_ssp_io_request_get_lun( | |
1415 | struct isci_request *request) | |
1416 | { | |
1417 | struct sas_task *task = isci_request_access_task(request); | |
1418 | ||
1419 | #ifdef DEBUG | |
1420 | int i; | |
1421 | ||
1422 | for (i = 0; i < 8; i++) | |
1423 | dev_dbg(&request->isci_host->pdev->dev, | |
1424 | "%s: request->task->ssp_task.LUN[%d] = %x\n", | |
1425 | __func__, i, request->task->ssp_task.LUN[i]); | |
1426 | ||
1427 | #endif | |
1428 | ||
1429 | return task->ssp_task.LUN[0]; | |
1430 | } | |
1431 | ||
1432 | ||
1433 | /** | |
1434 | * isci_request_ssp_io_request_get_task_attribute() - This function is called | |
1435 | * by the sci core to retrieve the task attribute for a given request. | |
1436 | * @request: This parameter is the isci_request object. | |
1437 | * | |
1438 | * task attribute for specified request. | |
1439 | */ | |
1440 | u32 isci_request_ssp_io_request_get_task_attribute( | |
1441 | struct isci_request *request) | |
1442 | { | |
1443 | struct sas_task *task = isci_request_access_task(request); | |
1444 | ||
1445 | dev_dbg(&request->isci_host->pdev->dev, | |
1446 | "%s: request->task->ssp_task.task_attr = %x\n", | |
1447 | __func__, | |
1448 | task->ssp_task.task_attr); | |
1449 | ||
1450 | return task->ssp_task.task_attr; | |
1451 | } | |
1452 | ||
1453 | ||
1454 | /** | |
1455 | * isci_request_ssp_io_request_get_command_priority() - This function is called | |
1456 | * by the sci core to retrieve the command priority for a given request. | |
1457 | * @request: This parameter is the isci_request object. | |
1458 | * | |
1459 | * command priority for specified request. | |
1460 | */ | |
1461 | u32 isci_request_ssp_io_request_get_command_priority( | |
1462 | struct isci_request *request) | |
1463 | { | |
1464 | struct sas_task *task = isci_request_access_task(request); | |
1465 | ||
1466 | dev_dbg(&request->isci_host->pdev->dev, | |
1467 | "%s: request->task->ssp_task.task_prio = %x\n", | |
1468 | __func__, | |
1469 | task->ssp_task.task_prio); | |
1470 | ||
1471 | return task->ssp_task.task_prio; | |
1472 | } |