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-rw-r--r--drivers/scsi/isci/request.c1472
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diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
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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
67static 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
82static 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 */
127static 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 */
174static 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 */
263static 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
309static 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 */
341int 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 */
367static 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 */
397int 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 */
504static 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 */
541static 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 */
569static 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 */
785static 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 */
868void 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 */
1221u32 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 */
1240SCI_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 */
1288dma_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 */
1339u32 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 */
1380void *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 */
1400u32 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 */
1414u32 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 */
1440u32 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 */
1461u32 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}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-13 00:41:33 -0500