blob: c1f439bed7176405e14abd25d805ac29f34fb2b7 [file] [log] [blame]
Dan Williams6f231dd2011-07-02 22:56:22 -07001/*
2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
4 *
5 * GPL LICENSE SUMMARY
6 *
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * BSD LICENSE
25 *
26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27 * All rights reserved.
28 *
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
31 * are met:
32 *
33 * * Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * * Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in
37 * the documentation and/or other materials provided with the
38 * distribution.
39 * * Neither the name of Intel Corporation nor the names of its
40 * contributors may be used to endorse or promote products derived
41 * from this software without specific prior written permission.
42 *
43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 */
55
56#include <linux/completion.h>
Dan Williams50e7f9b2011-03-09 21:27:46 -080057#include <linux/irqflags.h>
Dave Jiangaf5ae892011-05-04 17:53:24 -070058#include "sas.h"
Jeff Skirvin61aaff42011-06-21 12:16:33 -070059#include <scsi/libsas.h>
Dan Williams88f3b622011-04-22 19:18:03 -070060#include "remote_device.h"
61#include "remote_node_context.h"
Dan Williams6f231dd2011-07-02 22:56:22 -070062#include "isci.h"
63#include "request.h"
Dan Williams6f231dd2011-07-02 22:56:22 -070064#include "task.h"
Dan Williams312e0c22011-06-28 13:47:09 -070065#include "host.h"
Dave Jiangaf5ae892011-05-04 17:53:24 -070066
Dan Williams50e7f9b2011-03-09 21:27:46 -080067/**
Dan Williams1077a572011-03-11 10:13:51 -080068* isci_task_refuse() - complete the request to the upper layer driver in
69* the case where an I/O needs to be completed back in the submit path.
70* @ihost: host on which the the request was queued
71* @task: request to complete
72* @response: response code for the completed task.
73* @status: status code for the completed task.
Dan Williams50e7f9b2011-03-09 21:27:46 -080074*
Dan Williams50e7f9b2011-03-09 21:27:46 -080075*/
Dan Williams1077a572011-03-11 10:13:51 -080076static void isci_task_refuse(struct isci_host *ihost, struct sas_task *task,
77 enum service_response response,
78 enum exec_status status)
Dan Williams50e7f9b2011-03-09 21:27:46 -080079
Dan Williams1077a572011-03-11 10:13:51 -080080{
81 enum isci_completion_selection disposition;
82
83 disposition = isci_perform_normal_io_completion;
84 disposition = isci_task_set_completion_status(task, response, status,
85 disposition);
Dan Williams50e7f9b2011-03-09 21:27:46 -080086
87 /* Tasks aborted specifically by a call to the lldd_abort_task
Dan Williams1077a572011-03-11 10:13:51 -080088 * function should not be completed to the host in the regular path.
89 */
90 switch (disposition) {
James Bottomleya5ec7f862011-07-03 14:14:45 -050091 case isci_perform_normal_io_completion:
92 /* Normal notification (task_done) */
93 dev_dbg(&ihost->pdev->dev,
94 "%s: Normal - task = %p, response=%d, "
95 "status=%d\n",
96 __func__, task, response, status);
Dan Williams50e7f9b2011-03-09 21:27:46 -080097
James Bottomleya5ec7f862011-07-03 14:14:45 -050098 task->lldd_task = NULL;
Dan Williams50e7f9b2011-03-09 21:27:46 -080099
James Bottomleya5ec7f862011-07-03 14:14:45 -0500100 isci_execpath_callback(ihost, task, task->task_done);
101 break;
Dan Williams50e7f9b2011-03-09 21:27:46 -0800102
James Bottomleya5ec7f862011-07-03 14:14:45 -0500103 case isci_perform_aborted_io_completion:
104 /*
105 * No notification because this request is already in the
106 * abort path.
107 */
108 dev_dbg(&ihost->pdev->dev,
109 "%s: Aborted - task = %p, response=%d, "
110 "status=%d\n",
111 __func__, task, response, status);
112 break;
Dan Williams50e7f9b2011-03-09 21:27:46 -0800113
James Bottomleya5ec7f862011-07-03 14:14:45 -0500114 case isci_perform_error_io_completion:
115 /* Use sas_task_abort */
116 dev_dbg(&ihost->pdev->dev,
117 "%s: Error - task = %p, response=%d, "
118 "status=%d\n",
119 __func__, task, response, status);
Jeff Skirvined8a72d2011-03-31 13:10:40 -0700120
James Bottomleya5ec7f862011-07-03 14:14:45 -0500121 isci_execpath_callback(ihost, task, sas_task_abort);
122 break;
Dan Williams50e7f9b2011-03-09 21:27:46 -0800123
James Bottomleya5ec7f862011-07-03 14:14:45 -0500124 default:
125 dev_dbg(&ihost->pdev->dev,
126 "%s: isci task notification default case!",
127 __func__);
128 sas_task_abort(task);
129 break;
Dan Williams50e7f9b2011-03-09 21:27:46 -0800130 }
131}
Dan Williams6f231dd2011-07-02 22:56:22 -0700132
Dan Williams1077a572011-03-11 10:13:51 -0800133#define for_each_sas_task(num, task) \
134 for (; num > 0; num--,\
135 task = list_entry(task->list.next, struct sas_task, list))
136
Jeff Skirvin9274f452011-06-23 17:09:02 -0700137
138static inline int isci_device_io_ready(struct isci_remote_device *idev,
139 struct sas_task *task)
140{
141 return idev ? test_bit(IDEV_IO_READY, &idev->flags) ||
142 (test_bit(IDEV_IO_NCQERROR, &idev->flags) &&
143 isci_task_is_ncq_recovery(task))
144 : 0;
145}
Dan Williams6f231dd2011-07-02 22:56:22 -0700146/**
147 * isci_task_execute_task() - This function is one of the SAS Domain Template
148 * functions. This function is called by libsas to send a task down to
149 * hardware.
150 * @task: This parameter specifies the SAS task to send.
151 * @num: This parameter specifies the number of tasks to queue.
152 * @gfp_flags: This parameter specifies the context of this call.
153 *
154 * status, zero indicates success.
155 */
156int isci_task_execute_task(struct sas_task *task, int num, gfp_t gfp_flags)
157{
Dan Williams4393aa42011-03-31 13:10:44 -0700158 struct isci_host *ihost = dev_to_ihost(task->dev);
Dan Williams209fae12011-06-13 17:39:44 -0700159 struct isci_remote_device *idev;
Dan Williamsf2088262011-06-16 11:26:12 -0700160 unsigned long flags;
161 bool io_ready;
Dan Williams312e0c22011-06-28 13:47:09 -0700162 u16 tag;
Dan Williams6f231dd2011-07-02 22:56:22 -0700163
Dan Williams1077a572011-03-11 10:13:51 -0800164 dev_dbg(&ihost->pdev->dev, "%s: num=%d\n", __func__, num);
Dan Williams6f231dd2011-07-02 22:56:22 -0700165
Dan Williams1077a572011-03-11 10:13:51 -0800166 for_each_sas_task(num, task) {
Dan Williams312e0c22011-06-28 13:47:09 -0700167 enum sci_status status = SCI_FAILURE;
168
Dan Williams209fae12011-06-13 17:39:44 -0700169 spin_lock_irqsave(&ihost->scic_lock, flags);
170 idev = isci_lookup_device(task->dev);
Jeff Skirvin9274f452011-06-23 17:09:02 -0700171 io_ready = isci_device_io_ready(idev, task);
Dan Williams312e0c22011-06-28 13:47:09 -0700172 tag = isci_alloc_tag(ihost);
Dan Williams209fae12011-06-13 17:39:44 -0700173 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -0700174
Dan Williamsf2088262011-06-16 11:26:12 -0700175 dev_dbg(&ihost->pdev->dev,
176 "task: %p, num: %d dev: %p idev: %p:%#lx cmd = %p\n",
177 task, num, task->dev, idev, idev ? idev->flags : 0,
178 task->uldd_task);
Jeff Skirvinf0846c62011-03-08 19:22:07 -0700179
Dan Williamsf2088262011-06-16 11:26:12 -0700180 if (!idev) {
181 isci_task_refuse(ihost, task, SAS_TASK_UNDELIVERED,
182 SAS_DEVICE_UNKNOWN);
Dan Williams312e0c22011-06-28 13:47:09 -0700183 } else if (!io_ready || tag == SCI_CONTROLLER_INVALID_IO_TAG) {
Dan Williamsf2088262011-06-16 11:26:12 -0700184 /* Indicate QUEUE_FULL so that the scsi midlayer
185 * retries.
186 */
187 isci_task_refuse(ihost, task, SAS_TASK_COMPLETE,
188 SAS_QUEUE_FULL);
Dan Williams6f231dd2011-07-02 22:56:22 -0700189 } else {
Jeff Skirvinf0846c62011-03-08 19:22:07 -0700190 /* There is a device and it's ready for I/O. */
191 spin_lock_irqsave(&task->task_state_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -0700192
Jeff Skirvinf0846c62011-03-08 19:22:07 -0700193 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
Dan Williamsf2088262011-06-16 11:26:12 -0700194 /* The I/O was aborted. */
Jeff Skirvinf0846c62011-03-08 19:22:07 -0700195 spin_unlock_irqrestore(&task->task_state_lock,
196 flags);
197
Dan Williams1077a572011-03-11 10:13:51 -0800198 isci_task_refuse(ihost, task,
199 SAS_TASK_UNDELIVERED,
200 SAM_STAT_TASK_ABORTED);
Jeff Skirvinf0846c62011-03-08 19:22:07 -0700201 } else {
Dan Williams6f231dd2011-07-02 22:56:22 -0700202 task->task_state_flags |= SAS_TASK_AT_INITIATOR;
203 spin_unlock_irqrestore(&task->task_state_lock, flags);
Jeff Skirvinf0846c62011-03-08 19:22:07 -0700204
205 /* build and send the request. */
Dan Williamsdb056252011-06-17 14:18:39 -0700206 status = isci_request_execute(ihost, idev, task, tag);
Jeff Skirvinf0846c62011-03-08 19:22:07 -0700207
208 if (status != SCI_SUCCESS) {
209
210 spin_lock_irqsave(&task->task_state_lock, flags);
211 /* Did not really start this command. */
212 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
213 spin_unlock_irqrestore(&task->task_state_lock, flags);
214
Jeff Skirvinc2cb8a52011-10-27 15:04:56 -0700215 if (test_bit(IDEV_GONE, &idev->flags)) {
216
217 /* Indicate that the device
218 * is gone.
219 */
220 isci_task_refuse(ihost, task,
221 SAS_TASK_UNDELIVERED,
222 SAS_DEVICE_UNKNOWN);
223 } else {
224 /* Indicate QUEUE_FULL so that
225 * the scsi midlayer retries.
226 * If the request failed for
227 * remote device reasons, it
228 * gets returned as
229 * SAS_TASK_UNDELIVERED next
230 * time through.
231 */
232 isci_task_refuse(ihost, task,
233 SAS_TASK_COMPLETE,
234 SAS_QUEUE_FULL);
235 }
Jeff Skirvinf0846c62011-03-08 19:22:07 -0700236 }
Dan Williams6f231dd2011-07-02 22:56:22 -0700237 }
238 }
Dan Williams312e0c22011-06-28 13:47:09 -0700239 if (status != SCI_SUCCESS && tag != SCI_CONTROLLER_INVALID_IO_TAG) {
240 spin_lock_irqsave(&ihost->scic_lock, flags);
241 /* command never hit the device, so just free
242 * the tci and skip the sequence increment
243 */
244 isci_tci_free(ihost, ISCI_TAG_TCI(tag));
245 spin_unlock_irqrestore(&ihost->scic_lock, flags);
246 }
Dan Williams209fae12011-06-13 17:39:44 -0700247 isci_put_device(idev);
Dan Williams1077a572011-03-11 10:13:51 -0800248 }
Dan Williams6f231dd2011-07-02 22:56:22 -0700249 return 0;
250}
251
Dan Williams16ba7702011-07-01 10:52:55 -0700252static enum sci_status isci_sata_management_task_request_build(struct isci_request *ireq)
253{
254 struct isci_tmf *isci_tmf;
255 enum sci_status status;
256
257 if (tmf_task != ireq->ttype)
258 return SCI_FAILURE;
259
260 isci_tmf = isci_request_access_tmf(ireq);
261
262 switch (isci_tmf->tmf_code) {
263
264 case isci_tmf_sata_srst_high:
265 case isci_tmf_sata_srst_low: {
266 struct host_to_dev_fis *fis = &ireq->stp.cmd;
267
268 memset(fis, 0, sizeof(*fis));
269
270 fis->fis_type = 0x27;
271 fis->flags &= ~0x80;
272 fis->flags &= 0xF0;
273 if (isci_tmf->tmf_code == isci_tmf_sata_srst_high)
274 fis->control |= ATA_SRST;
275 else
276 fis->control &= ~ATA_SRST;
277 break;
278 }
279 /* other management commnd go here... */
280 default:
281 return SCI_FAILURE;
282 }
283
284 /* core builds the protocol specific request
285 * based on the h2d fis.
286 */
287 status = sci_task_request_construct_sata(ireq);
288
289 return status;
290}
291
Dan Williams0d0cf142011-06-13 00:51:30 -0700292static struct isci_request *isci_task_request_build(struct isci_host *ihost,
Dan Williams209fae12011-06-13 17:39:44 -0700293 struct isci_remote_device *idev,
Dan Williams312e0c22011-06-28 13:47:09 -0700294 u16 tag, struct isci_tmf *isci_tmf)
Dan Williams6f231dd2011-07-02 22:56:22 -0700295{
Dan Williams6f231dd2011-07-02 22:56:22 -0700296 enum sci_status status = SCI_FAILURE;
Dan Williams0d0cf142011-06-13 00:51:30 -0700297 struct isci_request *ireq = NULL;
Dan Williamsa1a113b2011-04-21 18:44:45 -0700298 struct domain_device *dev;
Dan Williams6f231dd2011-07-02 22:56:22 -0700299
Dan Williams0d0cf142011-06-13 00:51:30 -0700300 dev_dbg(&ihost->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -0700301 "%s: isci_tmf = %p\n", __func__, isci_tmf);
302
Dan Williams0d0cf142011-06-13 00:51:30 -0700303 dev = idev->domain_dev;
Dan Williams6f231dd2011-07-02 22:56:22 -0700304
305 /* do common allocation and init of request object. */
Dan Williamsdb056252011-06-17 14:18:39 -0700306 ireq = isci_tmf_request_from_tag(ihost, isci_tmf, tag);
Dan Williams0d0cf142011-06-13 00:51:30 -0700307 if (!ireq)
308 return NULL;
Dan Williams6f231dd2011-07-02 22:56:22 -0700309
310 /* let the core do it's construct. */
Dan Williams89a73012011-06-30 19:14:33 -0700311 status = sci_task_request_construct(ihost, idev, tag,
Dan Williams5076a1a2011-06-27 14:57:03 -0700312 ireq);
Dan Williams6f231dd2011-07-02 22:56:22 -0700313
314 if (status != SCI_SUCCESS) {
Dan Williams0d0cf142011-06-13 00:51:30 -0700315 dev_warn(&ihost->pdev->dev,
Dan Williams89a73012011-06-30 19:14:33 -0700316 "%s: sci_task_request_construct failed - "
Dan Williams6f231dd2011-07-02 22:56:22 -0700317 "status = 0x%x\n",
318 __func__,
319 status);
Dan Williamsdb056252011-06-17 14:18:39 -0700320 return NULL;
Dan Williams6f231dd2011-07-02 22:56:22 -0700321 }
322
Dan Williamsa1a113b2011-04-21 18:44:45 -0700323 /* XXX convert to get this from task->tproto like other drivers */
324 if (dev->dev_type == SAS_END_DEV) {
Dan Williams6f231dd2011-07-02 22:56:22 -0700325 isci_tmf->proto = SAS_PROTOCOL_SSP;
Dan Williams89a73012011-06-30 19:14:33 -0700326 status = sci_task_request_construct_ssp(ireq);
Dan Williams6f231dd2011-07-02 22:56:22 -0700327 if (status != SCI_SUCCESS)
Dan Williamsdb056252011-06-17 14:18:39 -0700328 return NULL;
Dan Williams6f231dd2011-07-02 22:56:22 -0700329 }
330
Dan Williamsa1a113b2011-04-21 18:44:45 -0700331 if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) {
Dan Williams6f231dd2011-07-02 22:56:22 -0700332 isci_tmf->proto = SAS_PROTOCOL_SATA;
Dan Williams0d0cf142011-06-13 00:51:30 -0700333 status = isci_sata_management_task_request_build(ireq);
Dan Williams6f231dd2011-07-02 22:56:22 -0700334
335 if (status != SCI_SUCCESS)
Dan Williamsdb056252011-06-17 14:18:39 -0700336 return NULL;
Dan Williams6f231dd2011-07-02 22:56:22 -0700337 }
Dan Williams0d0cf142011-06-13 00:51:30 -0700338 return ireq;
Dan Williams6f231dd2011-07-02 22:56:22 -0700339}
340
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700341/**
342* isci_request_mark_zombie() - This function must be called with scic_lock held.
343*/
344static void isci_request_mark_zombie(struct isci_host *ihost, struct isci_request *ireq)
345{
346 struct completion *tmf_completion = NULL;
347 struct completion *req_completion;
348
349 /* Set the request state to "dead". */
350 ireq->status = dead;
351
352 req_completion = ireq->io_request_completion;
353 ireq->io_request_completion = NULL;
354
355 if (ireq->ttype == io_task) {
356
357 /* Break links with the sas_task - the callback is done
358 * elsewhere.
359 */
360 struct sas_task *task = isci_request_access_task(ireq);
361
362 if (task)
363 task->lldd_task = NULL;
364
365 ireq->ttype_ptr.io_task_ptr = NULL;
366 } else {
367 /* Break links with the TMF request. */
368 struct isci_tmf *tmf = isci_request_access_tmf(ireq);
369
370 /* In the case where a task request is dying,
371 * the thread waiting on the complete will sit and
372 * timeout unless we wake it now. Since the TMF
373 * has a default error status, complete it here
374 * to wake the waiting thread.
375 */
376 if (tmf) {
377 tmf_completion = tmf->complete;
378 tmf->complete = NULL;
379 }
380 ireq->ttype_ptr.tmf_task_ptr = NULL;
381 dev_dbg(&ihost->pdev->dev, "%s: tmf_code %d, managed tag %#x\n",
382 __func__, tmf->tmf_code, tmf->io_tag);
383 }
384
385 dev_warn(&ihost->pdev->dev, "task context unrecoverable (tag: %#x)\n",
386 ireq->io_tag);
387
388 /* Don't force waiting threads to timeout. */
389 if (req_completion)
390 complete(req_completion);
391
392 if (tmf_completion != NULL)
393 complete(tmf_completion);
394}
395
Dan Williams16ba7702011-07-01 10:52:55 -0700396static int isci_task_execute_tmf(struct isci_host *ihost,
397 struct isci_remote_device *idev,
398 struct isci_tmf *tmf, unsigned long timeout_ms)
Dan Williams6f231dd2011-07-02 22:56:22 -0700399{
400 DECLARE_COMPLETION_ONSTACK(completion);
Bartosz Barcinski467e8552011-04-12 17:28:41 -0700401 enum sci_task_status status = SCI_TASK_FAILURE;
Dan Williams0d0cf142011-06-13 00:51:30 -0700402 struct isci_request *ireq;
Dan Williams6f231dd2011-07-02 22:56:22 -0700403 int ret = TMF_RESP_FUNC_FAILED;
404 unsigned long flags;
Edmund Nadolskifd183882011-05-19 12:00:15 +0000405 unsigned long timeleft;
Dan Williams312e0c22011-06-28 13:47:09 -0700406 u16 tag;
407
408 spin_lock_irqsave(&ihost->scic_lock, flags);
409 tag = isci_alloc_tag(ihost);
410 spin_unlock_irqrestore(&ihost->scic_lock, flags);
411
412 if (tag == SCI_CONTROLLER_INVALID_IO_TAG)
413 return ret;
Dan Williams6f231dd2011-07-02 22:56:22 -0700414
415 /* sanity check, return TMF_RESP_FUNC_FAILED
416 * if the device is not there and ready.
417 */
Dan Williams78a6f062011-06-30 16:31:37 -0700418 if (!idev ||
419 (!test_bit(IDEV_IO_READY, &idev->flags) &&
420 !test_bit(IDEV_IO_NCQERROR, &idev->flags))) {
Dan Williams0d0cf142011-06-13 00:51:30 -0700421 dev_dbg(&ihost->pdev->dev,
Dan Williams78a6f062011-06-30 16:31:37 -0700422 "%s: idev = %p not ready (%#lx)\n",
Dan Williams6f231dd2011-07-02 22:56:22 -0700423 __func__,
Dan Williams78a6f062011-06-30 16:31:37 -0700424 idev, idev ? idev->flags : 0);
Dan Williams312e0c22011-06-28 13:47:09 -0700425 goto err_tci;
Dan Williams6f231dd2011-07-02 22:56:22 -0700426 } else
Dan Williams0d0cf142011-06-13 00:51:30 -0700427 dev_dbg(&ihost->pdev->dev,
Dan Williams78a6f062011-06-30 16:31:37 -0700428 "%s: idev = %p\n",
429 __func__, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -0700430
431 /* Assign the pointer to the TMF's completion kernel wait structure. */
432 tmf->complete = &completion;
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700433 tmf->status = SCI_FAILURE_TIMEOUT;
Dan Williams6f231dd2011-07-02 22:56:22 -0700434
Dan Williams78a6f062011-06-30 16:31:37 -0700435 ireq = isci_task_request_build(ihost, idev, tag, tmf);
Dan Williams312e0c22011-06-28 13:47:09 -0700436 if (!ireq)
437 goto err_tci;
Dan Williams6f231dd2011-07-02 22:56:22 -0700438
Dan Williams0d0cf142011-06-13 00:51:30 -0700439 spin_lock_irqsave(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -0700440
441 /* start the TMF io. */
Dan Williams89a73012011-06-30 19:14:33 -0700442 status = sci_controller_start_task(ihost, idev, ireq);
Dan Williams6f231dd2011-07-02 22:56:22 -0700443
Bartosz Barcinski467e8552011-04-12 17:28:41 -0700444 if (status != SCI_TASK_SUCCESS) {
Dan Williamsa8a0a132011-07-01 12:07:25 -0700445 dev_dbg(&ihost->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -0700446 "%s: start_io failed - status = 0x%x, request = %p\n",
447 __func__,
448 status,
Dan Williams0d0cf142011-06-13 00:51:30 -0700449 ireq);
450 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williamsdb056252011-06-17 14:18:39 -0700451 goto err_tci;
Dan Williams6f231dd2011-07-02 22:56:22 -0700452 }
453
Dan Williams6f231dd2011-07-02 22:56:22 -0700454 if (tmf->cb_state_func != NULL)
455 tmf->cb_state_func(isci_tmf_started, tmf, tmf->cb_data);
456
Dan Williams0d0cf142011-06-13 00:51:30 -0700457 isci_request_change_state(ireq, started);
Dan Williams6f231dd2011-07-02 22:56:22 -0700458
459 /* add the request to the remote device request list. */
Dan Williams78a6f062011-06-30 16:31:37 -0700460 list_add(&ireq->dev_node, &idev->reqs_in_process);
Dan Williams6f231dd2011-07-02 22:56:22 -0700461
Dan Williams0d0cf142011-06-13 00:51:30 -0700462 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -0700463
464 /* Wait for the TMF to complete, or a timeout. */
Edmund Nadolskifd183882011-05-19 12:00:15 +0000465 timeleft = wait_for_completion_timeout(&completion,
Dan Williams086a0da2011-06-21 16:23:03 -0700466 msecs_to_jiffies(timeout_ms));
Edmund Nadolskifd183882011-05-19 12:00:15 +0000467
468 if (timeleft == 0) {
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700469 /* The TMF did not complete - this could be because
470 * of an unplug. Terminate the TMF request now.
471 */
Dan Williams0d0cf142011-06-13 00:51:30 -0700472 spin_lock_irqsave(&ihost->scic_lock, flags);
Edmund Nadolskifd183882011-05-19 12:00:15 +0000473
474 if (tmf->cb_state_func != NULL)
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700475 tmf->cb_state_func(isci_tmf_timed_out, tmf,
476 tmf->cb_data);
Edmund Nadolskifd183882011-05-19 12:00:15 +0000477
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700478 sci_controller_terminate_request(ihost, idev, ireq);
Edmund Nadolskifd183882011-05-19 12:00:15 +0000479
Dan Williams0d0cf142011-06-13 00:51:30 -0700480 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williams086a0da2011-06-21 16:23:03 -0700481
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700482 timeleft = wait_for_completion_timeout(
483 &completion,
484 msecs_to_jiffies(ISCI_TERMINATION_TIMEOUT_MSEC));
485
486 if (!timeleft) {
487 /* Strange condition - the termination of the TMF
488 * request timed-out.
489 */
490 spin_lock_irqsave(&ihost->scic_lock, flags);
491
492 /* If the TMF status has not changed, kill it. */
493 if (tmf->status == SCI_FAILURE_TIMEOUT)
494 isci_request_mark_zombie(ihost, ireq);
495
496 spin_unlock_irqrestore(&ihost->scic_lock, flags);
497 }
Edmund Nadolskifd183882011-05-19 12:00:15 +0000498 }
Dan Williams6f231dd2011-07-02 22:56:22 -0700499
500 isci_print_tmf(tmf);
501
502 if (tmf->status == SCI_SUCCESS)
503 ret = TMF_RESP_FUNC_COMPLETE;
504 else if (tmf->status == SCI_FAILURE_IO_RESPONSE_VALID) {
Dan Williams0d0cf142011-06-13 00:51:30 -0700505 dev_dbg(&ihost->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -0700506 "%s: tmf.status == "
507 "SCI_FAILURE_IO_RESPONSE_VALID\n",
508 __func__);
509 ret = TMF_RESP_FUNC_COMPLETE;
510 }
511 /* Else - leave the default "failed" status alone. */
512
Dan Williams0d0cf142011-06-13 00:51:30 -0700513 dev_dbg(&ihost->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -0700514 "%s: completed request = %p\n",
515 __func__,
Dan Williams0d0cf142011-06-13 00:51:30 -0700516 ireq);
Dan Williams6f231dd2011-07-02 22:56:22 -0700517
Dan Williams6f231dd2011-07-02 22:56:22 -0700518 return ret;
Dan Williams312e0c22011-06-28 13:47:09 -0700519
Dan Williams312e0c22011-06-28 13:47:09 -0700520 err_tci:
521 spin_lock_irqsave(&ihost->scic_lock, flags);
522 isci_tci_free(ihost, ISCI_TAG_TCI(tag));
523 spin_unlock_irqrestore(&ihost->scic_lock, flags);
524
525 return ret;
Dan Williams6f231dd2011-07-02 22:56:22 -0700526}
527
Dan Williams16ba7702011-07-01 10:52:55 -0700528static void isci_task_build_tmf(struct isci_tmf *tmf,
529 enum isci_tmf_function_codes code,
530 void (*tmf_sent_cb)(enum isci_tmf_cb_state,
531 struct isci_tmf *,
532 void *),
533 void *cb_data)
Dan Williams6f231dd2011-07-02 22:56:22 -0700534{
Dan Williams6f231dd2011-07-02 22:56:22 -0700535 memset(tmf, 0, sizeof(*tmf));
536
Dan Williams6f231dd2011-07-02 22:56:22 -0700537 tmf->tmf_code = code;
Dan Williams6f231dd2011-07-02 22:56:22 -0700538 tmf->cb_state_func = tmf_sent_cb;
Jeff Skirvinc3f42fe2011-03-04 14:06:56 -0800539 tmf->cb_data = cb_data;
540}
Jeff Skirvin1fad9e92011-03-04 14:06:46 -0800541
Dan Williams16ba7702011-07-01 10:52:55 -0700542static void isci_task_build_abort_task_tmf(struct isci_tmf *tmf,
543 enum isci_tmf_function_codes code,
544 void (*tmf_sent_cb)(enum isci_tmf_cb_state,
545 struct isci_tmf *,
546 void *),
547 struct isci_request *old_request)
Jeff Skirvinc3f42fe2011-03-04 14:06:56 -0800548{
Dan Williams16ba7702011-07-01 10:52:55 -0700549 isci_task_build_tmf(tmf, code, tmf_sent_cb, old_request);
Jeff Skirvinc3f42fe2011-03-04 14:06:56 -0800550 tmf->io_tag = old_request->io_tag;
Dan Williams6f231dd2011-07-02 22:56:22 -0700551}
552
Dan Williams6f231dd2011-07-02 22:56:22 -0700553/**
554 * isci_task_validate_request_to_abort() - This function checks the given I/O
555 * against the "started" state. If the request is still "started", it's
556 * state is changed to aborted. NOTE: isci_host->scic_lock MUST BE HELD
557 * BEFORE CALLING THIS FUNCTION.
558 * @isci_request: This parameter specifies the request object to control.
559 * @isci_host: This parameter specifies the ISCI host object
560 * @isci_device: This is the device to which the request is pending.
561 * @aborted_io_completion: This is a completion structure that will be added to
562 * the request in case it is changed to aborting; this completion is
563 * triggered when the request is fully completed.
564 *
565 * Either "started" on successful change of the task status to "aborted", or
566 * "unallocated" if the task cannot be controlled.
567 */
568static enum isci_request_status isci_task_validate_request_to_abort(
569 struct isci_request *isci_request,
570 struct isci_host *isci_host,
571 struct isci_remote_device *isci_device,
572 struct completion *aborted_io_completion)
573{
574 enum isci_request_status old_state = unallocated;
575
576 /* Only abort the task if it's in the
577 * device's request_in_process list
578 */
579 if (isci_request && !list_empty(&isci_request->dev_node)) {
580 old_state = isci_request_change_started_to_aborted(
581 isci_request, aborted_io_completion);
582
Dan Williams6f231dd2011-07-02 22:56:22 -0700583 }
584
585 return old_state;
586}
587
Jeff Skirvind6891682011-10-27 15:05:01 -0700588static int isci_request_is_dealloc_managed(enum isci_request_status stat)
589{
590 switch (stat) {
591 case aborted:
592 case aborting:
593 case terminating:
594 case completed:
595 case dead:
596 return true;
597 default:
598 return false;
599 }
600}
601
Dan Williams6f231dd2011-07-02 22:56:22 -0700602/**
603 * isci_terminate_request_core() - This function will terminate the given
604 * request, and wait for it to complete. This function must only be called
605 * from a thread that can wait. Note that the request is terminated and
606 * completed (back to the host, if started there).
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700607 * @ihost: This SCU.
Dan Williams78a6f062011-06-30 16:31:37 -0700608 * @idev: The target.
Dan Williams6f231dd2011-07-02 22:56:22 -0700609 * @isci_request: The I/O request to be terminated.
610 *
Dan Williams6f231dd2011-07-02 22:56:22 -0700611 */
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700612static void isci_terminate_request_core(struct isci_host *ihost,
613 struct isci_remote_device *idev,
614 struct isci_request *isci_request)
Dan Williams6f231dd2011-07-02 22:56:22 -0700615{
Jeff Skirvincbb65c62011-03-04 14:06:50 -0800616 enum sci_status status = SCI_SUCCESS;
Dan Williams6f231dd2011-07-02 22:56:22 -0700617 bool was_terminated = false;
618 bool needs_cleanup_handling = false;
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700619 unsigned long flags;
620 unsigned long termination_completed = 1;
621 struct completion *io_request_completion;
Dan Williams6f231dd2011-07-02 22:56:22 -0700622
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700623 dev_dbg(&ihost->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -0700624 "%s: device = %p; request = %p\n",
Dan Williams78a6f062011-06-30 16:31:37 -0700625 __func__, idev, isci_request);
Dan Williams6f231dd2011-07-02 22:56:22 -0700626
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700627 spin_lock_irqsave(&ihost->scic_lock, flags);
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800628
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700629 io_request_completion = isci_request->io_request_completion;
630
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800631 /* Note that we are not going to control
Dan Williams38d88792011-06-23 14:33:48 -0700632 * the target to abort the request.
633 */
634 set_bit(IREQ_COMPLETE_IN_TARGET, &isci_request->flags);
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800635
Dan Williams6f231dd2011-07-02 22:56:22 -0700636 /* Make sure the request wasn't just sitting around signalling
637 * device condition (if the request handle is NULL, then the
638 * request completed but needed additional handling here).
639 */
Dan Williams38d88792011-06-23 14:33:48 -0700640 if (!test_bit(IREQ_TERMINATED, &isci_request->flags)) {
Dan Williams6f231dd2011-07-02 22:56:22 -0700641 was_terminated = true;
Jeff Skirvincbb65c62011-03-04 14:06:50 -0800642 needs_cleanup_handling = true;
Dan Williams89a73012011-06-30 19:14:33 -0700643 status = sci_controller_terminate_request(ihost,
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700644 idev,
645 isci_request);
Dan Williams6f231dd2011-07-02 22:56:22 -0700646 }
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700647 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -0700648
649 /*
650 * The only time the request to terminate will
651 * fail is when the io request is completed and
652 * being aborted.
653 */
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800654 if (status != SCI_SUCCESS) {
Dan Williamsa8a0a132011-07-01 12:07:25 -0700655 dev_dbg(&ihost->pdev->dev,
Dan Williams89a73012011-06-30 19:14:33 -0700656 "%s: sci_controller_terminate_request"
Dan Williams6f231dd2011-07-02 22:56:22 -0700657 " returned = 0x%x\n",
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700658 __func__, status);
659
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800660 isci_request->io_request_completion = NULL;
661
662 } else {
Dan Williams6f231dd2011-07-02 22:56:22 -0700663 if (was_terminated) {
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700664 dev_dbg(&ihost->pdev->dev,
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700665 "%s: before completion wait (%p/%p)\n",
666 __func__, isci_request, io_request_completion);
Dan Williams6f231dd2011-07-02 22:56:22 -0700667
668 /* Wait here for the request to complete. */
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700669 termination_completed
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800670 = wait_for_completion_timeout(
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700671 io_request_completion,
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700672 msecs_to_jiffies(ISCI_TERMINATION_TIMEOUT_MSEC));
Dan Williams6f231dd2011-07-02 22:56:22 -0700673
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700674 if (!termination_completed) {
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800675
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700676 /* The request to terminate has timed out. */
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700677 spin_lock_irqsave(&ihost->scic_lock, flags);
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800678
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700679 /* Check for state changes. */
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700680 if (!test_bit(IREQ_TERMINATED,
681 &isci_request->flags)) {
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800682
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700683 /* The best we can do is to have the
684 * request die a silent death if it
685 * ever really completes.
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700686 */
Jeff Skirvinb343dff2011-10-27 15:05:06 -0700687 isci_request_mark_zombie(ihost,
688 isci_request);
689 needs_cleanup_handling = true;
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700690 } else
691 termination_completed = 1;
692
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700693 spin_unlock_irqrestore(&ihost->scic_lock,
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700694 flags);
695
696 if (!termination_completed) {
697
Dan Williamsa8a0a132011-07-01 12:07:25 -0700698 dev_dbg(&ihost->pdev->dev,
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700699 "%s: *** Timeout waiting for "
700 "termination(%p/%p)\n",
701 __func__, io_request_completion,
702 isci_request);
703
704 /* The request can no longer be referenced
705 * safely since it may go away if the
706 * termination every really does complete.
707 */
708 isci_request = NULL;
709 }
710 }
711 if (termination_completed)
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700712 dev_dbg(&ihost->pdev->dev,
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700713 "%s: after completion wait (%p/%p)\n",
714 __func__, isci_request, io_request_completion);
Dan Williams6f231dd2011-07-02 22:56:22 -0700715 }
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800716
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700717 if (termination_completed) {
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800718
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700719 isci_request->io_request_completion = NULL;
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800720
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700721 /* Peek at the status of the request. This will tell
722 * us if there was special handling on the request such that it
723 * needs to be detached and freed here.
724 */
725 spin_lock_irqsave(&isci_request->state_lock, flags);
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700726
Jeff Skirvind6891682011-10-27 15:05:01 -0700727 needs_cleanup_handling
728 = isci_request_is_dealloc_managed(
729 isci_request->status);
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700730
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700731 spin_unlock_irqrestore(&isci_request->state_lock, flags);
732
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800733 }
Jeff Skirvindb49c2d2011-10-27 15:05:11 -0700734 if (needs_cleanup_handling) {
735
736 dev_dbg(&ihost->pdev->dev,
737 "%s: cleanup isci_device=%p, request=%p\n",
738 __func__, idev, isci_request);
739
740 if (isci_request != NULL) {
741 spin_lock_irqsave(&ihost->scic_lock, flags);
742 isci_free_tag(ihost, isci_request->io_tag);
743 isci_request_change_state(isci_request, unallocated);
744 list_del_init(&isci_request->dev_node);
745 spin_unlock_irqrestore(&ihost->scic_lock, flags);
746 }
747 }
Jeff Skirvina5fde222011-03-04 14:06:42 -0800748 }
Dan Williams6f231dd2011-07-02 22:56:22 -0700749}
750
751/**
752 * isci_terminate_pending_requests() - This function will change the all of the
753 * requests on the given device's state to "aborting", will terminate the
754 * requests, and wait for them to complete. This function must only be
755 * called from a thread that can wait. Note that the requests are all
756 * terminated and completed (back to the host, if started there).
757 * @isci_host: This parameter specifies SCU.
Dan Williams78a6f062011-06-30 16:31:37 -0700758 * @idev: This parameter specifies the target.
Dan Williams6f231dd2011-07-02 22:56:22 -0700759 *
Dan Williams6f231dd2011-07-02 22:56:22 -0700760 */
Dan Williams980d3ae2011-06-20 15:11:22 -0700761void isci_terminate_pending_requests(struct isci_host *ihost,
762 struct isci_remote_device *idev)
Dan Williams6f231dd2011-07-02 22:56:22 -0700763{
Dan Williams980d3ae2011-06-20 15:11:22 -0700764 struct completion request_completion;
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700765 enum isci_request_status old_state;
Dan Williams980d3ae2011-06-20 15:11:22 -0700766 unsigned long flags;
767 LIST_HEAD(list);
Dan Williams6f231dd2011-07-02 22:56:22 -0700768
Dan Williams980d3ae2011-06-20 15:11:22 -0700769 spin_lock_irqsave(&ihost->scic_lock, flags);
770 list_splice_init(&idev->reqs_in_process, &list);
Dan Williams6f231dd2011-07-02 22:56:22 -0700771
Dan Williams980d3ae2011-06-20 15:11:22 -0700772 /* assumes that isci_terminate_request_core deletes from the list */
773 while (!list_empty(&list)) {
774 struct isci_request *ireq = list_entry(list.next, typeof(*ireq), dev_node);
Dan Williams6f231dd2011-07-02 22:56:22 -0700775
Dan Williams980d3ae2011-06-20 15:11:22 -0700776 /* Change state to "terminating" if it is currently
777 * "started".
778 */
779 old_state = isci_request_change_started_to_newstate(ireq,
780 &request_completion,
781 terminating);
782 switch (old_state) {
783 case started:
784 case completed:
785 case aborting:
786 break;
787 default:
788 /* termination in progress, or otherwise dispositioned.
789 * We know the request was on 'list' so should be safe
790 * to move it back to reqs_in_process
791 */
792 list_move(&ireq->dev_node, &idev->reqs_in_process);
793 ireq = NULL;
794 break;
795 }
796
797 if (!ireq)
798 continue;
799 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800800
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700801 init_completion(&request_completion);
Jeff Skirvin4dc043c2011-03-04 14:06:52 -0800802
Dan Williams980d3ae2011-06-20 15:11:22 -0700803 dev_dbg(&ihost->pdev->dev,
804 "%s: idev=%p request=%p; task=%p old_state=%d\n",
805 __func__, idev, ireq,
806 ireq->ttype == io_task ? isci_request_access_task(ireq) : NULL,
807 old_state);
Jeff Skirvin77c852f2011-06-20 14:09:16 -0700808
Dan Williams980d3ae2011-06-20 15:11:22 -0700809 /* If the old_state is started:
810 * This request was not already being aborted. If it had been,
811 * then the aborting I/O (ie. the TMF request) would not be in
812 * the aborting state, and thus would be terminated here. Note
813 * that since the TMF completion's call to the kernel function
814 * "complete()" does not happen until the pending I/O request
815 * terminate fully completes, we do not have to implement a
816 * special wait here for already aborting requests - the
817 * termination of the TMF request will force the request
818 * to finish it's already started terminate.
819 *
820 * If old_state == completed:
821 * This request completed from the SCU hardware perspective
822 * and now just needs cleaning up in terms of freeing the
823 * request and potentially calling up to libsas.
824 *
825 * If old_state == aborting:
826 * This request has already gone through a TMF timeout, but may
827 * not have been terminated; needs cleaning up at least.
828 */
829 isci_terminate_request_core(ihost, idev, ireq);
830 spin_lock_irqsave(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -0700831 }
Dan Williams980d3ae2011-06-20 15:11:22 -0700832 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -0700833}
834
835/**
836 * isci_task_send_lu_reset_sas() - This function is called by of the SAS Domain
837 * Template functions.
838 * @lun: This parameter specifies the lun to be reset.
839 *
840 * status, zero indicates success.
841 */
842static int isci_task_send_lu_reset_sas(
843 struct isci_host *isci_host,
844 struct isci_remote_device *isci_device,
845 u8 *lun)
846{
847 struct isci_tmf tmf;
848 int ret = TMF_RESP_FUNC_FAILED;
849
850 dev_dbg(&isci_host->pdev->dev,
851 "%s: isci_host = %p, isci_device = %p\n",
852 __func__, isci_host, isci_device);
853 /* Send the LUN reset to the target. By the time the call returns,
854 * the TMF has fully exected in the target (in which case the return
855 * value is "TMF_RESP_FUNC_COMPLETE", or the request timed-out (or
856 * was otherwise unable to be executed ("TMF_RESP_FUNC_FAILED").
857 */
Dan Williams209fae12011-06-13 17:39:44 -0700858 isci_task_build_tmf(&tmf, isci_tmf_ssp_lun_reset, NULL, NULL);
Dan Williams6f231dd2011-07-02 22:56:22 -0700859
860 #define ISCI_LU_RESET_TIMEOUT_MS 2000 /* 2 second timeout. */
Dan Williams209fae12011-06-13 17:39:44 -0700861 ret = isci_task_execute_tmf(isci_host, isci_device, &tmf, ISCI_LU_RESET_TIMEOUT_MS);
Dan Williams6f231dd2011-07-02 22:56:22 -0700862
863 if (ret == TMF_RESP_FUNC_COMPLETE)
864 dev_dbg(&isci_host->pdev->dev,
865 "%s: %p: TMF_LU_RESET passed\n",
866 __func__, isci_device);
867 else
868 dev_dbg(&isci_host->pdev->dev,
869 "%s: %p: TMF_LU_RESET failed (%x)\n",
870 __func__, isci_device, ret);
871
872 return ret;
873}
874
Dan Williams16ba7702011-07-01 10:52:55 -0700875static int isci_task_send_lu_reset_sata(struct isci_host *ihost,
876 struct isci_remote_device *idev, u8 *lun)
877{
878 int ret = TMF_RESP_FUNC_FAILED;
879 struct isci_tmf tmf;
880
881 /* Send the soft reset to the target */
882 #define ISCI_SRST_TIMEOUT_MS 25000 /* 25 second timeout. */
883 isci_task_build_tmf(&tmf, isci_tmf_sata_srst_high, NULL, NULL);
884
885 ret = isci_task_execute_tmf(ihost, idev, &tmf, ISCI_SRST_TIMEOUT_MS);
886
887 if (ret != TMF_RESP_FUNC_COMPLETE) {
Dan Williamsa8a0a132011-07-01 12:07:25 -0700888 dev_dbg(&ihost->pdev->dev,
Dan Williams16ba7702011-07-01 10:52:55 -0700889 "%s: Assert SRST failed (%p) = %x",
890 __func__, idev, ret);
891
892 /* Return the failure so that the LUN reset is escalated
893 * to a target reset.
894 */
895 }
896 return ret;
897}
898
Dan Williams6f231dd2011-07-02 22:56:22 -0700899/**
900 * isci_task_lu_reset() - This function is one of the SAS Domain Template
901 * functions. This is one of the Task Management functoins called by libsas,
902 * to reset the given lun. Note the assumption that while this call is
903 * executing, no I/O will be sent by the host to the device.
904 * @lun: This parameter specifies the lun to be reset.
905 *
906 * status, zero indicates success.
907 */
Dan Williams4393aa42011-03-31 13:10:44 -0700908int isci_task_lu_reset(struct domain_device *domain_device, u8 *lun)
Dan Williams6f231dd2011-07-02 22:56:22 -0700909{
Dan Williams4393aa42011-03-31 13:10:44 -0700910 struct isci_host *isci_host = dev_to_ihost(domain_device);
Dan Williams209fae12011-06-13 17:39:44 -0700911 struct isci_remote_device *isci_device;
912 unsigned long flags;
Dan Williams6f231dd2011-07-02 22:56:22 -0700913 int ret;
Dan Williams6f231dd2011-07-02 22:56:22 -0700914
Dan Williams209fae12011-06-13 17:39:44 -0700915 spin_lock_irqsave(&isci_host->scic_lock, flags);
916 isci_device = isci_lookup_device(domain_device);
917 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -0700918
Dan Williams4393aa42011-03-31 13:10:44 -0700919 dev_dbg(&isci_host->pdev->dev,
920 "%s: domain_device=%p, isci_host=%p; isci_device=%p\n",
Dan Williams6f231dd2011-07-02 22:56:22 -0700921 __func__, domain_device, isci_host, isci_device);
922
Dan Williams209fae12011-06-13 17:39:44 -0700923 if (isci_device)
Dan Williamsd06b4872011-05-02 13:59:25 -0700924 set_bit(IDEV_EH, &isci_device->flags);
Dan Williams6f231dd2011-07-02 22:56:22 -0700925
926 /* If there is a device reset pending on any request in the
927 * device's list, fail this LUN reset request in order to
928 * escalate to the device reset.
929 */
Dan Williams209fae12011-06-13 17:39:44 -0700930 if (!isci_device ||
Dan Williams4393aa42011-03-31 13:10:44 -0700931 isci_device_is_reset_pending(isci_host, isci_device)) {
Dan Williamsa8a0a132011-07-01 12:07:25 -0700932 dev_dbg(&isci_host->pdev->dev,
Dan Williams4393aa42011-03-31 13:10:44 -0700933 "%s: No dev (%p), or "
Dan Williams6f231dd2011-07-02 22:56:22 -0700934 "RESET PENDING: domain_device=%p\n",
Dan Williams4393aa42011-03-31 13:10:44 -0700935 __func__, isci_device, domain_device);
Dan Williams209fae12011-06-13 17:39:44 -0700936 ret = TMF_RESP_FUNC_FAILED;
937 goto out;
Dan Williams6f231dd2011-07-02 22:56:22 -0700938 }
939
Dan Williams6f231dd2011-07-02 22:56:22 -0700940 /* Send the task management part of the reset. */
941 if (sas_protocol_ata(domain_device->tproto)) {
Dan Williams4393aa42011-03-31 13:10:44 -0700942 ret = isci_task_send_lu_reset_sata(isci_host, isci_device, lun);
Dan Williams6f231dd2011-07-02 22:56:22 -0700943 } else
944 ret = isci_task_send_lu_reset_sas(isci_host, isci_device, lun);
945
946 /* If the LUN reset worked, all the I/O can now be terminated. */
947 if (ret == TMF_RESP_FUNC_COMPLETE)
948 /* Terminate all I/O now. */
949 isci_terminate_pending_requests(isci_host,
Dan Williams980d3ae2011-06-20 15:11:22 -0700950 isci_device);
Dan Williams6f231dd2011-07-02 22:56:22 -0700951
Dan Williams209fae12011-06-13 17:39:44 -0700952 out:
953 isci_put_device(isci_device);
Dan Williams6f231dd2011-07-02 22:56:22 -0700954 return ret;
955}
956
957
958/* int (*lldd_clear_nexus_port)(struct asd_sas_port *); */
959int isci_task_clear_nexus_port(struct asd_sas_port *port)
960{
961 return TMF_RESP_FUNC_FAILED;
962}
963
964
965
966int isci_task_clear_nexus_ha(struct sas_ha_struct *ha)
967{
968 return TMF_RESP_FUNC_FAILED;
969}
970
Dan Williams6f231dd2011-07-02 22:56:22 -0700971/* Task Management Functions. Must be called from process context. */
972
973/**
974 * isci_abort_task_process_cb() - This is a helper function for the abort task
975 * TMF command. It manages the request state with respect to the successful
976 * transmission / completion of the abort task request.
977 * @cb_state: This parameter specifies when this function was called - after
978 * the TMF request has been started and after it has timed-out.
979 * @tmf: This parameter specifies the TMF in progress.
980 *
981 *
982 */
983static void isci_abort_task_process_cb(
984 enum isci_tmf_cb_state cb_state,
985 struct isci_tmf *tmf,
986 void *cb_data)
987{
988 struct isci_request *old_request;
989
990 old_request = (struct isci_request *)cb_data;
991
992 dev_dbg(&old_request->isci_host->pdev->dev,
993 "%s: tmf=%p, old_request=%p\n",
994 __func__, tmf, old_request);
995
996 switch (cb_state) {
997
998 case isci_tmf_started:
999 /* The TMF has been started. Nothing to do here, since the
1000 * request state was already set to "aborted" by the abort
1001 * task function.
1002 */
Bartosz Barcinski6cb4d6b2011-04-12 17:28:43 -07001003 if ((old_request->status != aborted)
1004 && (old_request->status != completed))
Dan Williamsa8a0a132011-07-01 12:07:25 -07001005 dev_dbg(&old_request->isci_host->pdev->dev,
Bartosz Barcinski6cb4d6b2011-04-12 17:28:43 -07001006 "%s: Bad request status (%d): tmf=%p, old_request=%p\n",
1007 __func__, old_request->status, tmf, old_request);
Dan Williams6f231dd2011-07-02 22:56:22 -07001008 break;
1009
1010 case isci_tmf_timed_out:
1011
1012 /* Set the task's state to "aborting", since the abort task
1013 * function thread set it to "aborted" (above) in anticipation
1014 * of the task management request working correctly. Since the
1015 * timeout has now fired, the TMF request failed. We set the
1016 * state such that the request completion will indicate the
1017 * device is no longer present.
1018 */
1019 isci_request_change_state(old_request, aborting);
1020 break;
1021
1022 default:
Dan Williamsa8a0a132011-07-01 12:07:25 -07001023 dev_dbg(&old_request->isci_host->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -07001024 "%s: Bad cb_state (%d): tmf=%p, old_request=%p\n",
1025 __func__, cb_state, tmf, old_request);
1026 break;
1027 }
1028}
1029
1030/**
1031 * isci_task_abort_task() - This function is one of the SAS Domain Template
1032 * functions. This function is called by libsas to abort a specified task.
1033 * @task: This parameter specifies the SAS task to abort.
1034 *
1035 * status, zero indicates success.
1036 */
1037int isci_task_abort_task(struct sas_task *task)
1038{
Dan Williams4393aa42011-03-31 13:10:44 -07001039 struct isci_host *isci_host = dev_to_ihost(task->dev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001040 DECLARE_COMPLETION_ONSTACK(aborted_io_completion);
Jeff Skirvina5fde222011-03-04 14:06:42 -08001041 struct isci_request *old_request = NULL;
1042 enum isci_request_status old_state;
Dan Williams6f231dd2011-07-02 22:56:22 -07001043 struct isci_remote_device *isci_device = NULL;
Jeff Skirvina5fde222011-03-04 14:06:42 -08001044 struct isci_tmf tmf;
1045 int ret = TMF_RESP_FUNC_FAILED;
1046 unsigned long flags;
1047 bool any_dev_reset = false;
Dan Williams6f231dd2011-07-02 22:56:22 -07001048
1049 /* Get the isci_request reference from the task. Note that
1050 * this check does not depend on the pending request list
1051 * in the device, because tasks driving resets may land here
1052 * after completion in the core.
1053 */
Dan Williams209fae12011-06-13 17:39:44 -07001054 spin_lock_irqsave(&isci_host->scic_lock, flags);
1055 spin_lock(&task->task_state_lock);
1056
1057 old_request = task->lldd_task;
1058
1059 /* If task is already done, the request isn't valid */
1060 if (!(task->task_state_flags & SAS_TASK_STATE_DONE) &&
1061 (task->task_state_flags & SAS_TASK_AT_INITIATOR) &&
1062 old_request)
1063 isci_device = isci_lookup_device(task->dev);
1064
1065 spin_unlock(&task->task_state_lock);
1066 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001067
1068 dev_dbg(&isci_host->pdev->dev,
1069 "%s: task = %p\n", __func__, task);
1070
Dan Williams209fae12011-06-13 17:39:44 -07001071 if (!isci_device || !old_request)
1072 goto out;
Dan Williams6f231dd2011-07-02 22:56:22 -07001073
Dan Williamsd06b4872011-05-02 13:59:25 -07001074 set_bit(IDEV_EH, &isci_device->flags);
1075
Dan Williams6f231dd2011-07-02 22:56:22 -07001076 /* This version of the driver will fail abort requests for
1077 * SATA/STP. Failing the abort request this way will cause the
1078 * SCSI error handler thread to escalate to LUN reset
1079 */
Dan Williams209fae12011-06-13 17:39:44 -07001080 if (sas_protocol_ata(task->task_proto)) {
Dan Williamsa8a0a132011-07-01 12:07:25 -07001081 dev_dbg(&isci_host->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -07001082 " task %p is for a STP/SATA device;"
1083 " returning TMF_RESP_FUNC_FAILED\n"
1084 " to cause a LUN reset...\n", task);
Dan Williams209fae12011-06-13 17:39:44 -07001085 goto out;
Dan Williams6f231dd2011-07-02 22:56:22 -07001086 }
1087
1088 dev_dbg(&isci_host->pdev->dev,
1089 "%s: old_request == %p\n", __func__, old_request);
1090
James Bottomleya5ec7f862011-07-03 14:14:45 -05001091 any_dev_reset = isci_device_is_reset_pending(isci_host, isci_device);
Jeff Skirvina5fde222011-03-04 14:06:42 -08001092
Dan Williams6f231dd2011-07-02 22:56:22 -07001093 spin_lock_irqsave(&task->task_state_lock, flags);
1094
Dan Williams209fae12011-06-13 17:39:44 -07001095 any_dev_reset = any_dev_reset || (task->task_state_flags & SAS_TASK_NEED_DEV_RESET);
Dan Williams6f231dd2011-07-02 22:56:22 -07001096
1097 /* If the extraction of the request reference from the task
1098 * failed, then the request has been completed (or if there is a
1099 * pending reset then this abort request function must be failed
1100 * in order to escalate to the target reset).
1101 */
Jeff Skirvina5fde222011-03-04 14:06:42 -08001102 if ((old_request == NULL) || any_dev_reset) {
Dan Williams6f231dd2011-07-02 22:56:22 -07001103
1104 /* If the device reset task flag is set, fail the task
1105 * management request. Otherwise, the original request
1106 * has completed.
1107 */
1108 if (any_dev_reset) {
1109
1110 /* Turn off the task's DONE to make sure this
1111 * task is escalated to a target reset.
1112 */
1113 task->task_state_flags &= ~SAS_TASK_STATE_DONE;
1114
Jeff Skirvina5fde222011-03-04 14:06:42 -08001115 /* Make the reset happen as soon as possible. */
1116 task->task_state_flags |= SAS_TASK_NEED_DEV_RESET;
1117
1118 spin_unlock_irqrestore(&task->task_state_lock, flags);
1119
Dan Williams6f231dd2011-07-02 22:56:22 -07001120 /* Fail the task management request in order to
1121 * escalate to the target reset.
1122 */
1123 ret = TMF_RESP_FUNC_FAILED;
1124
1125 dev_dbg(&isci_host->pdev->dev,
1126 "%s: Failing task abort in order to "
1127 "escalate to target reset because\n"
1128 "SAS_TASK_NEED_DEV_RESET is set for "
1129 "task %p on dev %p\n",
1130 __func__, task, isci_device);
1131
Jeff Skirvina5fde222011-03-04 14:06:42 -08001132
Dan Williams6f231dd2011-07-02 22:56:22 -07001133 } else {
Dan Williams6f231dd2011-07-02 22:56:22 -07001134 /* The request has already completed and there
1135 * is nothing to do here other than to set the task
1136 * done bit, and indicate that the task abort function
1137 * was sucessful.
1138 */
1139 isci_set_task_doneflags(task);
1140
Jeff Skirvina5fde222011-03-04 14:06:42 -08001141 spin_unlock_irqrestore(&task->task_state_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001142
Jeff Skirvina5fde222011-03-04 14:06:42 -08001143 ret = TMF_RESP_FUNC_COMPLETE;
Dan Williams6f231dd2011-07-02 22:56:22 -07001144
Jeff Skirvina5fde222011-03-04 14:06:42 -08001145 dev_dbg(&isci_host->pdev->dev,
1146 "%s: abort task not needed for %p\n",
1147 __func__, task);
Dan Williams6f231dd2011-07-02 22:56:22 -07001148 }
Dan Williams209fae12011-06-13 17:39:44 -07001149 goto out;
James Bottomleya5ec7f862011-07-03 14:14:45 -05001150 } else {
Jeff Skirvina5fde222011-03-04 14:06:42 -08001151 spin_unlock_irqrestore(&task->task_state_lock, flags);
James Bottomleya5ec7f862011-07-03 14:14:45 -05001152 }
Dan Williams6f231dd2011-07-02 22:56:22 -07001153
1154 spin_lock_irqsave(&isci_host->scic_lock, flags);
1155
Jeff Skirvinf219f012011-03-31 13:10:34 -07001156 /* Check the request status and change to "aborted" if currently
Jeff Skirvina5fde222011-03-04 14:06:42 -08001157 * "starting"; if true then set the I/O kernel completion
Dan Williams6f231dd2011-07-02 22:56:22 -07001158 * struct that will be triggered when the request completes.
1159 */
Jeff Skirvina5fde222011-03-04 14:06:42 -08001160 old_state = isci_task_validate_request_to_abort(
1161 old_request, isci_host, isci_device,
1162 &aborted_io_completion);
Jeff Skirvinf219f012011-03-31 13:10:34 -07001163 if ((old_state != started) &&
1164 (old_state != completed) &&
1165 (old_state != aborting)) {
Dan Williams6f231dd2011-07-02 22:56:22 -07001166
1167 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
1168
Jeff Skirvina5fde222011-03-04 14:06:42 -08001169 /* The request was already being handled by someone else (because
1170 * they got to set the state away from started).
1171 */
1172 dev_dbg(&isci_host->pdev->dev,
1173 "%s: device = %p; old_request %p already being aborted\n",
1174 __func__,
1175 isci_device, old_request);
Dan Williams209fae12011-06-13 17:39:44 -07001176 ret = TMF_RESP_FUNC_COMPLETE;
1177 goto out;
Dan Williams6f231dd2011-07-02 22:56:22 -07001178 }
Dan Williams38d88792011-06-23 14:33:48 -07001179 if (task->task_proto == SAS_PROTOCOL_SMP ||
1180 test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags)) {
Dan Williams6f231dd2011-07-02 22:56:22 -07001181
1182 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
1183
Jeff Skirvina5fde222011-03-04 14:06:42 -08001184 dev_dbg(&isci_host->pdev->dev,
1185 "%s: SMP request (%d)"
Jeff Skirvina5fde222011-03-04 14:06:42 -08001186 " or complete_in_target (%d), thus no TMF\n",
1187 __func__, (task->task_proto == SAS_PROTOCOL_SMP),
Dan Williams38d88792011-06-23 14:33:48 -07001188 test_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags));
Jeff Skirvina5fde222011-03-04 14:06:42 -08001189
Dan Williams6f231dd2011-07-02 22:56:22 -07001190 /* Set the state on the task. */
1191 isci_task_all_done(task);
1192
1193 ret = TMF_RESP_FUNC_COMPLETE;
1194
1195 /* Stopping and SMP devices are not sent a TMF, and are not
Jeff Skirvina5fde222011-03-04 14:06:42 -08001196 * reset, but the outstanding I/O request is terminated below.
Dan Williams6f231dd2011-07-02 22:56:22 -07001197 */
Dan Williams6f231dd2011-07-02 22:56:22 -07001198 } else {
1199 /* Fill in the tmf stucture */
Dan Williams209fae12011-06-13 17:39:44 -07001200 isci_task_build_abort_task_tmf(&tmf, isci_tmf_ssp_task_abort,
Jeff Skirvinc3f42fe2011-03-04 14:06:56 -08001201 isci_abort_task_process_cb,
1202 old_request);
Dan Williams6f231dd2011-07-02 22:56:22 -07001203
Dan Williams6f231dd2011-07-02 22:56:22 -07001204 spin_unlock_irqrestore(&isci_host->scic_lock, flags);
1205
1206 #define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */
Dan Williams209fae12011-06-13 17:39:44 -07001207 ret = isci_task_execute_tmf(isci_host, isci_device, &tmf,
Dan Williams6f231dd2011-07-02 22:56:22 -07001208 ISCI_ABORT_TASK_TIMEOUT_MS);
1209
Jeff Skirvina5fde222011-03-04 14:06:42 -08001210 if (ret != TMF_RESP_FUNC_COMPLETE)
Dan Williamsa8a0a132011-07-01 12:07:25 -07001211 dev_dbg(&isci_host->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -07001212 "%s: isci_task_send_tmf failed\n",
1213 __func__);
1214 }
Jeff Skirvina5fde222011-03-04 14:06:42 -08001215 if (ret == TMF_RESP_FUNC_COMPLETE) {
Dan Williams38d88792011-06-23 14:33:48 -07001216 set_bit(IREQ_COMPLETE_IN_TARGET, &old_request->flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001217
Jeff Skirvin77c852f2011-06-20 14:09:16 -07001218 /* Clean up the request on our side, and wait for the aborted
1219 * I/O to complete.
1220 */
Jeff Skirvincbb65c62011-03-04 14:06:50 -08001221 isci_terminate_request_core(isci_host, isci_device, old_request);
Jeff Skirvina5fde222011-03-04 14:06:42 -08001222 }
1223
1224 /* Make sure we do not leave a reference to aborted_io_completion */
1225 old_request->io_request_completion = NULL;
Dan Williams209fae12011-06-13 17:39:44 -07001226 out:
1227 isci_put_device(isci_device);
Dan Williams6f231dd2011-07-02 22:56:22 -07001228 return ret;
1229}
1230
1231/**
1232 * isci_task_abort_task_set() - This function is one of the SAS Domain Template
1233 * functions. This is one of the Task Management functoins called by libsas,
1234 * to abort all task for the given lun.
1235 * @d_device: This parameter specifies the domain device associated with this
1236 * request.
1237 * @lun: This parameter specifies the lun associated with this request.
1238 *
1239 * status, zero indicates success.
1240 */
1241int isci_task_abort_task_set(
1242 struct domain_device *d_device,
1243 u8 *lun)
1244{
1245 return TMF_RESP_FUNC_FAILED;
1246}
1247
1248
1249/**
1250 * isci_task_clear_aca() - This function is one of the SAS Domain Template
1251 * functions. This is one of the Task Management functoins called by libsas.
1252 * @d_device: This parameter specifies the domain device associated with this
1253 * request.
1254 * @lun: This parameter specifies the lun associated with this request.
1255 *
1256 * status, zero indicates success.
1257 */
1258int isci_task_clear_aca(
1259 struct domain_device *d_device,
1260 u8 *lun)
1261{
1262 return TMF_RESP_FUNC_FAILED;
1263}
1264
1265
1266
1267/**
1268 * isci_task_clear_task_set() - This function is one of the SAS Domain Template
1269 * functions. This is one of the Task Management functoins called by libsas.
1270 * @d_device: This parameter specifies the domain device associated with this
1271 * request.
1272 * @lun: This parameter specifies the lun associated with this request.
1273 *
1274 * status, zero indicates success.
1275 */
1276int isci_task_clear_task_set(
1277 struct domain_device *d_device,
1278 u8 *lun)
1279{
1280 return TMF_RESP_FUNC_FAILED;
1281}
1282
1283
1284/**
1285 * isci_task_query_task() - This function is implemented to cause libsas to
1286 * correctly escalate the failed abort to a LUN or target reset (this is
1287 * because sas_scsi_find_task libsas function does not correctly interpret
1288 * all return codes from the abort task call). When TMF_RESP_FUNC_SUCC is
1289 * returned, libsas turns this into a LUN reset; when FUNC_FAILED is
1290 * returned, libsas will turn this into a target reset
1291 * @task: This parameter specifies the sas task being queried.
1292 * @lun: This parameter specifies the lun associated with this request.
1293 *
1294 * status, zero indicates success.
1295 */
1296int isci_task_query_task(
1297 struct sas_task *task)
1298{
1299 /* See if there is a pending device reset for this device. */
1300 if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET)
1301 return TMF_RESP_FUNC_FAILED;
1302 else
1303 return TMF_RESP_FUNC_SUCC;
1304}
1305
Dave Jiangaf5ae892011-05-04 17:53:24 -07001306/*
Dan Williams6f231dd2011-07-02 22:56:22 -07001307 * isci_task_request_complete() - This function is called by the sci core when
1308 * an task request completes.
Dave Jiangaf5ae892011-05-04 17:53:24 -07001309 * @ihost: This parameter specifies the ISCI host object
1310 * @ireq: This parameter is the completed isci_request object.
Dan Williams6f231dd2011-07-02 22:56:22 -07001311 * @completion_status: This parameter specifies the completion status from the
1312 * sci core.
1313 *
1314 * none.
1315 */
Dave Jiangaf5ae892011-05-04 17:53:24 -07001316void
1317isci_task_request_complete(struct isci_host *ihost,
1318 struct isci_request *ireq,
1319 enum sci_task_status completion_status)
Dan Williams6f231dd2011-07-02 22:56:22 -07001320{
Dave Jiangaf5ae892011-05-04 17:53:24 -07001321 struct isci_tmf *tmf = isci_request_access_tmf(ireq);
Jeff Skirvinb343dff2011-10-27 15:05:06 -07001322 struct completion *tmf_complete = NULL;
1323 struct completion *request_complete = ireq->io_request_completion;
Dan Williams6f231dd2011-07-02 22:56:22 -07001324
Dave Jiangaf5ae892011-05-04 17:53:24 -07001325 dev_dbg(&ihost->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -07001326 "%s: request = %p, status=%d\n",
Dave Jiangaf5ae892011-05-04 17:53:24 -07001327 __func__, ireq, completion_status);
Dan Williams6f231dd2011-07-02 22:56:22 -07001328
Dave Jiang8d2c65c2011-06-01 09:03:08 +00001329 isci_request_change_state(ireq, completed);
Dan Williams6f231dd2011-07-02 22:56:22 -07001330
Dan Williams38d88792011-06-23 14:33:48 -07001331 set_bit(IREQ_COMPLETE_IN_TARGET, &ireq->flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001332
Jeff Skirvinb343dff2011-10-27 15:05:06 -07001333 if (tmf) {
1334 tmf->status = completion_status;
1335
1336 if (tmf->proto == SAS_PROTOCOL_SSP) {
1337 memcpy(&tmf->resp.resp_iu,
1338 &ireq->ssp.rsp,
1339 SSP_RESP_IU_MAX_SIZE);
1340 } else if (tmf->proto == SAS_PROTOCOL_SATA) {
1341 memcpy(&tmf->resp.d2h_fis,
1342 &ireq->stp.rsp,
1343 sizeof(struct dev_to_host_fis));
1344 }
1345 /* PRINT_TMF( ((struct isci_tmf *)request->task)); */
1346 tmf_complete = tmf->complete;
Dan Williams6f231dd2011-07-02 22:56:22 -07001347 }
Dan Williams89a73012011-06-30 19:14:33 -07001348 sci_controller_complete_io(ihost, ireq->target_device, ireq);
Dan Williams67ea8382011-05-08 11:47:15 -07001349 /* set the 'terminated' flag handle to make sure it cannot be terminated
Dan Williams6f231dd2011-07-02 22:56:22 -07001350 * or completed again.
1351 */
Dan Williams38d88792011-06-23 14:33:48 -07001352 set_bit(IREQ_TERMINATED, &ireq->flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001353
Jeff Skirvind6891682011-10-27 15:05:01 -07001354 /* As soon as something is in the terminate path, deallocation is
1355 * managed there. Note that the final non-managed state of a task
1356 * request is "completed".
1357 */
1358 if ((ireq->status == completed) ||
1359 !isci_request_is_dealloc_managed(ireq->status)) {
1360 isci_request_change_state(ireq, unallocated);
1361 isci_free_tag(ihost, ireq->io_tag);
1362 list_del_init(&ireq->dev_node);
1363 }
Dan Williams6f231dd2011-07-02 22:56:22 -07001364
Jeff Skirvinb343dff2011-10-27 15:05:06 -07001365 /* "request_complete" is set if the task was being terminated. */
1366 if (request_complete)
1367 complete(request_complete);
1368
Dan Williams6f231dd2011-07-02 22:56:22 -07001369 /* The task management part completes last. */
Jeff Skirvinb343dff2011-10-27 15:05:06 -07001370 if (tmf_complete)
1371 complete(tmf_complete);
Dan Williams6f231dd2011-07-02 22:56:22 -07001372}
1373
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001374static void isci_smp_task_timedout(unsigned long _task)
1375{
1376 struct sas_task *task = (void *) _task;
1377 unsigned long flags;
1378
1379 spin_lock_irqsave(&task->task_state_lock, flags);
1380 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
1381 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
1382 spin_unlock_irqrestore(&task->task_state_lock, flags);
1383
1384 complete(&task->completion);
1385}
1386
1387static void isci_smp_task_done(struct sas_task *task)
1388{
1389 if (!del_timer(&task->timer))
1390 return;
1391 complete(&task->completion);
1392}
1393
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001394static int isci_smp_execute_task(struct isci_host *ihost,
1395 struct domain_device *dev, void *req,
1396 int req_size, void *resp, int resp_size)
1397{
1398 int res, retry;
1399 struct sas_task *task = NULL;
1400
1401 for (retry = 0; retry < 3; retry++) {
Dan Williams4fcf8122011-07-29 17:26:39 -07001402 task = sas_alloc_task(GFP_KERNEL);
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001403 if (!task)
1404 return -ENOMEM;
1405
1406 task->dev = dev;
1407 task->task_proto = dev->tproto;
1408 sg_init_one(&task->smp_task.smp_req, req, req_size);
1409 sg_init_one(&task->smp_task.smp_resp, resp, resp_size);
1410
1411 task->task_done = isci_smp_task_done;
1412
1413 task->timer.data = (unsigned long) task;
1414 task->timer.function = isci_smp_task_timedout;
1415 task->timer.expires = jiffies + 10*HZ;
1416 add_timer(&task->timer);
1417
1418 res = isci_task_execute_task(task, 1, GFP_KERNEL);
1419
1420 if (res) {
1421 del_timer(&task->timer);
Dan Williamsa8a0a132011-07-01 12:07:25 -07001422 dev_dbg(&ihost->pdev->dev,
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001423 "%s: executing SMP task failed:%d\n",
1424 __func__, res);
1425 goto ex_err;
1426 }
1427
1428 wait_for_completion(&task->completion);
1429 res = -ECOMM;
1430 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
Dan Williamsa8a0a132011-07-01 12:07:25 -07001431 dev_dbg(&ihost->pdev->dev,
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001432 "%s: smp task timed out or aborted\n",
1433 __func__);
1434 isci_task_abort_task(task);
1435 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
Dan Williamsa8a0a132011-07-01 12:07:25 -07001436 dev_dbg(&ihost->pdev->dev,
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001437 "%s: SMP task aborted and not done\n",
1438 __func__);
1439 goto ex_err;
1440 }
1441 }
1442 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1443 task->task_status.stat == SAM_STAT_GOOD) {
1444 res = 0;
1445 break;
1446 }
1447 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1448 task->task_status.stat == SAS_DATA_UNDERRUN) {
1449 /* no error, but return the number of bytes of
1450 * underrun */
1451 res = task->task_status.residual;
1452 break;
1453 }
1454 if (task->task_status.resp == SAS_TASK_COMPLETE &&
1455 task->task_status.stat == SAS_DATA_OVERRUN) {
1456 res = -EMSGSIZE;
1457 break;
1458 } else {
Dan Williamsa8a0a132011-07-01 12:07:25 -07001459 dev_dbg(&ihost->pdev->dev,
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001460 "%s: task to dev %016llx response: 0x%x "
1461 "status 0x%x\n", __func__,
1462 SAS_ADDR(dev->sas_addr),
1463 task->task_status.resp,
1464 task->task_status.stat);
Dan Williams4fcf8122011-07-29 17:26:39 -07001465 sas_free_task(task);
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001466 task = NULL;
1467 }
1468 }
1469ex_err:
1470 BUG_ON(retry == 3 && task != NULL);
Dan Williams4fcf8122011-07-29 17:26:39 -07001471 sas_free_task(task);
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001472 return res;
1473}
1474
1475#define DISCOVER_REQ_SIZE 16
1476#define DISCOVER_RESP_SIZE 56
1477
1478int isci_smp_get_phy_attached_dev_type(struct isci_host *ihost,
1479 struct domain_device *dev,
1480 int phy_id, int *adt)
1481{
1482 struct smp_resp *disc_resp;
1483 u8 *disc_req;
1484 int res;
1485
1486 disc_resp = kzalloc(DISCOVER_RESP_SIZE, GFP_KERNEL);
1487 if (!disc_resp)
1488 return -ENOMEM;
1489
1490 disc_req = kzalloc(DISCOVER_REQ_SIZE, GFP_KERNEL);
1491 if (disc_req) {
1492 disc_req[0] = SMP_REQUEST;
1493 disc_req[1] = SMP_DISCOVER;
1494 disc_req[9] = phy_id;
1495 } else {
1496 kfree(disc_resp);
1497 return -ENOMEM;
1498 }
1499 res = isci_smp_execute_task(ihost, dev, disc_req, DISCOVER_REQ_SIZE,
1500 disc_resp, DISCOVER_RESP_SIZE);
1501 if (!res) {
1502 if (disc_resp->result != SMP_RESP_FUNC_ACC)
1503 res = disc_resp->result;
1504 else
1505 *adt = disc_resp->disc.attached_dev_type;
1506 }
1507 kfree(disc_req);
1508 kfree(disc_resp);
1509
1510 return res;
1511}
1512
1513static void isci_wait_for_smp_phy_reset(struct isci_remote_device *idev, int phy_num)
1514{
1515 struct domain_device *dev = idev->domain_dev;
1516 struct isci_port *iport = idev->isci_port;
1517 struct isci_host *ihost = iport->isci_host;
1518 int res, iteration = 0, attached_device_type;
1519 #define STP_WAIT_MSECS 25000
1520 unsigned long tmo = msecs_to_jiffies(STP_WAIT_MSECS);
1521 unsigned long deadline = jiffies + tmo;
1522 enum {
1523 SMP_PHYWAIT_PHYDOWN,
1524 SMP_PHYWAIT_PHYUP,
1525 SMP_PHYWAIT_DONE
1526 } phy_state = SMP_PHYWAIT_PHYDOWN;
1527
1528 /* While there is time, wait for the phy to go away and come back */
1529 while (time_is_after_jiffies(deadline) && phy_state != SMP_PHYWAIT_DONE) {
1530 int event = atomic_read(&iport->event);
1531
1532 ++iteration;
1533
1534 tmo = wait_event_timeout(ihost->eventq,
1535 event != atomic_read(&iport->event) ||
1536 !test_bit(IPORT_BCN_BLOCKED, &iport->flags),
1537 tmo);
1538 /* link down, stop polling */
1539 if (!test_bit(IPORT_BCN_BLOCKED, &iport->flags))
1540 break;
1541
1542 dev_dbg(&ihost->pdev->dev,
1543 "%s: iport %p, iteration %d,"
1544 " phase %d: time_remaining %lu, bcns = %d\n",
1545 __func__, iport, iteration, phy_state,
1546 tmo, test_bit(IPORT_BCN_PENDING, &iport->flags));
1547
1548 res = isci_smp_get_phy_attached_dev_type(ihost, dev, phy_num,
1549 &attached_device_type);
1550 tmo = deadline - jiffies;
1551
1552 if (res) {
Dan Williamsa8a0a132011-07-01 12:07:25 -07001553 dev_dbg(&ihost->pdev->dev,
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001554 "%s: iteration %d, phase %d:"
1555 " SMP error=%d, time_remaining=%lu\n",
1556 __func__, iteration, phy_state, res, tmo);
1557 break;
1558 }
1559 dev_dbg(&ihost->pdev->dev,
1560 "%s: iport %p, iteration %d,"
1561 " phase %d: time_remaining %lu, bcns = %d, "
1562 "attdevtype = %x\n",
1563 __func__, iport, iteration, phy_state,
1564 tmo, test_bit(IPORT_BCN_PENDING, &iport->flags),
1565 attached_device_type);
1566
1567 switch (phy_state) {
1568 case SMP_PHYWAIT_PHYDOWN:
1569 /* Has the device gone away? */
1570 if (!attached_device_type)
1571 phy_state = SMP_PHYWAIT_PHYUP;
1572
1573 break;
1574
1575 case SMP_PHYWAIT_PHYUP:
1576 /* Has the device come back? */
1577 if (attached_device_type)
1578 phy_state = SMP_PHYWAIT_DONE;
1579 break;
1580
1581 case SMP_PHYWAIT_DONE:
1582 break;
1583 }
1584
1585 }
1586 dev_dbg(&ihost->pdev->dev, "%s: done\n", __func__);
1587}
1588
Dan Williams209fae12011-06-13 17:39:44 -07001589static int isci_reset_device(struct isci_host *ihost,
Jeff Skirvinbc6f3872011-07-01 13:03:44 -07001590 struct isci_remote_device *idev)
Dan Williams6f231dd2011-07-02 22:56:22 -07001591{
Dan Williams209fae12011-06-13 17:39:44 -07001592 struct sas_phy *phy = sas_find_local_phy(idev->domain_dev);
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001593 struct isci_port *iport = idev->isci_port;
Dan Williams6f231dd2011-07-02 22:56:22 -07001594 enum sci_status status;
Dan Williamsd06b4872011-05-02 13:59:25 -07001595 unsigned long flags;
1596 int rc;
Dan Williams6f231dd2011-07-02 22:56:22 -07001597
Dan Williamsd06b4872011-05-02 13:59:25 -07001598 dev_dbg(&ihost->pdev->dev, "%s: idev %p\n", __func__, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001599
Dan Williamsd06b4872011-05-02 13:59:25 -07001600 spin_lock_irqsave(&ihost->scic_lock, flags);
Dan Williams89a73012011-06-30 19:14:33 -07001601 status = sci_remote_device_reset(idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001602 if (status != SCI_SUCCESS) {
Dan Williamsd06b4872011-05-02 13:59:25 -07001603 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001604
Dan Williamsa8a0a132011-07-01 12:07:25 -07001605 dev_dbg(&ihost->pdev->dev,
Dan Williams89a73012011-06-30 19:14:33 -07001606 "%s: sci_remote_device_reset(%p) returned %d!\n",
Dan Williamsd06b4872011-05-02 13:59:25 -07001607 __func__, idev, status);
Dan Williams6f231dd2011-07-02 22:56:22 -07001608
1609 return TMF_RESP_FUNC_FAILED;
1610 }
Dan Williamsd06b4872011-05-02 13:59:25 -07001611 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001612
Dan Williams6f231dd2011-07-02 22:56:22 -07001613 /* Make sure all pending requests are able to be fully terminated. */
Dan Williamsd06b4872011-05-02 13:59:25 -07001614 isci_device_clear_reset_pending(ihost, idev);
1615
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001616 /* If this is a device on an expander, disable BCN processing. */
1617 if (!scsi_is_sas_phy_local(phy))
1618 set_bit(IPORT_BCN_BLOCKED, &iport->flags);
1619
Jeff Skirvinbc6f3872011-07-01 13:03:44 -07001620 rc = sas_phy_reset(phy, true);
Dan Williams6f231dd2011-07-02 22:56:22 -07001621
1622 /* Terminate in-progress I/O now. */
Dan Williamsd06b4872011-05-02 13:59:25 -07001623 isci_remote_device_nuke_requests(ihost, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001624
Jeff Skirvinff717ab2011-06-20 14:08:51 -07001625 /* Since all pending TCs have been cleaned, resume the RNC. */
Dan Williamsd06b4872011-05-02 13:59:25 -07001626 spin_lock_irqsave(&ihost->scic_lock, flags);
Dan Williams89a73012011-06-30 19:14:33 -07001627 status = sci_remote_device_reset_complete(idev);
Dan Williamsd06b4872011-05-02 13:59:25 -07001628 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001629
Jeff Skirvin61aaff42011-06-21 12:16:33 -07001630 /* If this is a device on an expander, bring the phy back up. */
1631 if (!scsi_is_sas_phy_local(phy)) {
1632 /* A phy reset will cause the device to go away then reappear.
1633 * Since libsas will take action on incoming BCNs (eg. remove
1634 * a device going through an SMP phy-control driven reset),
1635 * we need to wait until the phy comes back up before letting
1636 * discovery proceed in libsas.
1637 */
1638 isci_wait_for_smp_phy_reset(idev, phy->number);
1639
1640 spin_lock_irqsave(&ihost->scic_lock, flags);
1641 isci_port_bcn_enable(ihost, idev->isci_port);
1642 spin_unlock_irqrestore(&ihost->scic_lock, flags);
1643 }
Jeff Skirvinff717ab2011-06-20 14:08:51 -07001644
Dan Williams6f231dd2011-07-02 22:56:22 -07001645 if (status != SCI_SUCCESS) {
Dan Williamsa8a0a132011-07-01 12:07:25 -07001646 dev_dbg(&ihost->pdev->dev,
Dan Williams89a73012011-06-30 19:14:33 -07001647 "%s: sci_remote_device_reset_complete(%p) "
Dan Williamsd06b4872011-05-02 13:59:25 -07001648 "returned %d!\n", __func__, idev, status);
Dan Williams6f231dd2011-07-02 22:56:22 -07001649 }
Dan Williams6f231dd2011-07-02 22:56:22 -07001650
Dan Williamsd06b4872011-05-02 13:59:25 -07001651 dev_dbg(&ihost->pdev->dev, "%s: idev %p complete.\n", __func__, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001652
Dan Williamsd06b4872011-05-02 13:59:25 -07001653 return rc;
1654}
1655
1656int isci_task_I_T_nexus_reset(struct domain_device *dev)
1657{
1658 struct isci_host *ihost = dev_to_ihost(dev);
Dan Williamsd06b4872011-05-02 13:59:25 -07001659 struct isci_remote_device *idev;
1660 unsigned long flags;
Jeff Skirvinbc6f3872011-07-01 13:03:44 -07001661 int ret;
Dan Williamsd06b4872011-05-02 13:59:25 -07001662
Dan Williamsd06b4872011-05-02 13:59:25 -07001663 spin_lock_irqsave(&ihost->scic_lock, flags);
Dan Williams209fae12011-06-13 17:39:44 -07001664 idev = isci_lookup_device(dev);
Dan Williamsd06b4872011-05-02 13:59:25 -07001665 spin_unlock_irqrestore(&ihost->scic_lock, flags);
1666
Dan Williams209fae12011-06-13 17:39:44 -07001667 if (!idev || !test_bit(IDEV_EH, &idev->flags)) {
1668 ret = TMF_RESP_FUNC_COMPLETE;
1669 goto out;
1670 }
Dan Williamsd06b4872011-05-02 13:59:25 -07001671
Jeff Skirvinbc6f3872011-07-01 13:03:44 -07001672 ret = isci_reset_device(ihost, idev);
Dan Williams209fae12011-06-13 17:39:44 -07001673 out:
1674 isci_put_device(idev);
1675 return ret;
Dan Williamsd06b4872011-05-02 13:59:25 -07001676}
1677
1678int isci_bus_reset_handler(struct scsi_cmnd *cmd)
1679{
1680 struct domain_device *dev = sdev_to_domain_dev(cmd->device);
Dan Williams209fae12011-06-13 17:39:44 -07001681 struct isci_host *ihost = dev_to_ihost(dev);
1682 struct isci_remote_device *idev;
Dan Williams209fae12011-06-13 17:39:44 -07001683 unsigned long flags;
Jeff Skirvinbc6f3872011-07-01 13:03:44 -07001684 int ret;
Dan Williamsd06b4872011-05-02 13:59:25 -07001685
Dan Williams209fae12011-06-13 17:39:44 -07001686 spin_lock_irqsave(&ihost->scic_lock, flags);
1687 idev = isci_lookup_device(dev);
1688 spin_unlock_irqrestore(&ihost->scic_lock, flags);
1689
1690 if (!idev) {
1691 ret = TMF_RESP_FUNC_COMPLETE;
1692 goto out;
1693 }
1694
Jeff Skirvinbc6f3872011-07-01 13:03:44 -07001695 ret = isci_reset_device(ihost, idev);
Dan Williams209fae12011-06-13 17:39:44 -07001696 out:
1697 isci_put_device(idev);
1698 return ret;
Dan Williams6f231dd2011-07-02 22:56:22 -07001699}