blob: 3048e02aeb7b1bc155c46505658005e4d13f384e [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 */
Dave Jiang2d9c2242011-05-04 18:45:05 -070055#include <scsi/sas.h>
Bartek Nowakowski7e629842012-01-04 01:33:20 -080056#include <linux/bitops.h>
Dan Williams6f231dd2011-07-02 22:56:22 -070057#include "isci.h"
Dan Williams6f231dd2011-07-02 22:56:22 -070058#include "port.h"
59#include "remote_device.h"
60#include "request.h"
Dan Williams88f3b622011-04-22 19:18:03 -070061#include "remote_node_context.h"
Dan Williams88f3b622011-04-22 19:18:03 -070062#include "scu_event_codes.h"
Dan Williams6f231dd2011-07-02 22:56:22 -070063#include "task.h"
64
Dan Williamsd7a0ccd2012-02-10 01:18:44 -080065#undef C
66#define C(a) (#a)
67const char *dev_state_name(enum sci_remote_device_states state)
68{
69 static const char * const strings[] = REMOTE_DEV_STATES;
70
71 return strings[state];
72}
73#undef C
74
Jeff Skirvin23ec2aa2012-03-08 22:41:52 -080075static enum sci_status sci_remote_device_suspend(struct isci_remote_device *idev)
76{
77 return sci_remote_node_context_suspend(&idev->rnc,
78 SCI_SOFTWARE_SUSPENSION,
79 SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT,
80 NULL, NULL);
81}
82
Dan Williamsab2e8f72011-04-27 16:32:45 -070083/**
Dan Williamsd9dcb4b2011-06-30 17:38:32 -070084 * isci_remote_device_not_ready() - This function is called by the ihost when
Dan Williamsab2e8f72011-04-27 16:32:45 -070085 * the remote device is not ready. We mark the isci device as ready (not
86 * "ready_for_io") and signal the waiting proccess.
87 * @isci_host: This parameter specifies the isci host object.
88 * @isci_device: This parameter specifies the remote device
89 *
Dan Williams89a73012011-06-30 19:14:33 -070090 * sci_lock is held on entrance to this function.
Dan Williamsab2e8f72011-04-27 16:32:45 -070091 */
92static void isci_remote_device_not_ready(struct isci_host *ihost,
93 struct isci_remote_device *idev, u32 reason)
94{
James Bottomleya5ec7f862011-07-03 14:14:45 -050095 struct isci_request *ireq;
Jeff Skirvin9274f452011-06-23 17:09:02 -070096
Dan Williamsab2e8f72011-04-27 16:32:45 -070097 dev_dbg(&ihost->pdev->dev,
98 "%s: isci_device = %p\n", __func__, idev);
99
Jeff Skirvin9274f452011-06-23 17:09:02 -0700100 switch (reason) {
101 case SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED:
Dan Williams209fae12011-06-13 17:39:44 -0700102 set_bit(IDEV_GONE, &idev->flags);
Jeff Skirvin9274f452011-06-23 17:09:02 -0700103 break;
104 case SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED:
105 set_bit(IDEV_IO_NCQERROR, &idev->flags);
106
Jeff Skirvin23ec2aa2012-03-08 22:41:52 -0800107 /* Suspend the remote device so the I/O can be terminated. */
108 sci_remote_device_suspend(idev);
109
Jeff Skirvin9274f452011-06-23 17:09:02 -0700110 /* Kill all outstanding requests for the device. */
111 list_for_each_entry(ireq, &idev->reqs_in_process, dev_node) {
112
113 dev_dbg(&ihost->pdev->dev,
114 "%s: isci_device = %p request = %p\n",
115 __func__, idev, ireq);
116
Jeff Skirvin23ec2aa2012-03-08 22:41:52 -0800117 sci_controller_terminate_request(ihost, idev, ireq);
Jeff Skirvin9274f452011-06-23 17:09:02 -0700118 }
119 /* Fall through into the default case... */
120 default:
Dan Williamsf2088262011-06-16 11:26:12 -0700121 clear_bit(IDEV_IO_READY, &idev->flags);
Jeff Skirvin9274f452011-06-23 17:09:02 -0700122 break;
123 }
Dan Williamsab2e8f72011-04-27 16:32:45 -0700124}
125
126/**
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700127 * isci_remote_device_ready() - This function is called by the ihost when the
Dan Williamsab2e8f72011-04-27 16:32:45 -0700128 * remote device is ready. We mark the isci device as ready and signal the
129 * waiting proccess.
130 * @ihost: our valid isci_host
131 * @idev: remote device
132 *
133 */
134static void isci_remote_device_ready(struct isci_host *ihost, struct isci_remote_device *idev)
135{
136 dev_dbg(&ihost->pdev->dev,
137 "%s: idev = %p\n", __func__, idev);
138
Jeff Skirvin9274f452011-06-23 17:09:02 -0700139 clear_bit(IDEV_IO_NCQERROR, &idev->flags);
Dan Williamsf2088262011-06-16 11:26:12 -0700140 set_bit(IDEV_IO_READY, &idev->flags);
Dan Williamsab2e8f72011-04-27 16:32:45 -0700141 if (test_and_clear_bit(IDEV_START_PENDING, &idev->flags))
142 wake_up(&ihost->eventq);
143}
144
Jeff Skirvin5b6bf222012-03-08 22:41:51 -0800145static int isci_remote_device_suspendcheck(struct isci_remote_device *idev)
146{
147 return test_bit(IDEV_TXRX_SUSPENDED, &idev->flags)
148 || !test_bit(IDEV_ALLOCATED, &idev->flags);
149}
150
Jeff Skirvin726980d2012-03-08 22:41:50 -0800151enum sci_status isci_remote_device_suspend(
152 struct isci_host *ihost,
153 struct isci_remote_device *idev)
154{
155 enum sci_status status;
156 unsigned long flags;
157
158 spin_lock_irqsave(&ihost->scic_lock, flags);
Jeff Skirvin5b6bf222012-03-08 22:41:51 -0800159 if (isci_get_device(idev->domain_dev) == NULL) {
Jeff Skirvin726980d2012-03-08 22:41:50 -0800160 spin_unlock_irqrestore(&ihost->scic_lock, flags);
161 status = SCI_FAILURE;
162 } else {
163 status = sci_remote_device_suspend(idev);
164 spin_unlock_irqrestore(&ihost->scic_lock, flags);
165 if (status == SCI_SUCCESS) {
Jeff Skirvin5b6bf222012-03-08 22:41:51 -0800166 dev_dbg(&ihost->pdev->dev,
167 "%s: idev=%p, about to wait\n",
168 __func__, idev);
Jeff Skirvin726980d2012-03-08 22:41:50 -0800169 wait_event(ihost->eventq,
Jeff Skirvin5b6bf222012-03-08 22:41:51 -0800170 isci_remote_device_suspendcheck(idev));
Jeff Skirvin726980d2012-03-08 22:41:50 -0800171 status = test_bit(IDEV_TXRX_SUSPENDED, &idev->flags)
172 ? SCI_SUCCESS : SCI_FAILURE;
173 dev_dbg(&ihost->pdev->dev,
174 "%s: idev=%p, wait done, device is %s\n",
175 __func__, idev,
176 test_bit(IDEV_TXRX_SUSPENDED, &idev->flags)
177 ? "<suspended>" : "<deallocated!>");
178
Jeff Skirvin5b6bf222012-03-08 22:41:51 -0800179 } else
180 dev_dbg(scirdev_to_dev(idev),
181 "%s: sci_remote_device_suspend failed, "
182 "status = %d\n", __func__, status);
Jeff Skirvin726980d2012-03-08 22:41:50 -0800183 isci_put_device(idev);
184 }
185 return status;
186}
187
Dan Williamsec575662011-05-01 14:19:25 -0700188/* called once the remote node context is ready to be freed.
189 * The remote device can now report that its stop operation is complete. none
190 */
191static void rnc_destruct_done(void *_dev)
Dan Williams88f3b622011-04-22 19:18:03 -0700192{
Dan Williams78a6f062011-06-30 16:31:37 -0700193 struct isci_remote_device *idev = _dev;
Dan Williamsec575662011-05-01 14:19:25 -0700194
Dan Williams78a6f062011-06-30 16:31:37 -0700195 BUG_ON(idev->started_request_count != 0);
196 sci_change_state(&idev->sm, SCI_DEV_STOPPED);
Dan Williamsec575662011-05-01 14:19:25 -0700197}
198
Jeff Skirvin726980d2012-03-08 22:41:50 -0800199static enum sci_status sci_remote_device_terminate_requests_checkabort(
200 struct isci_remote_device *idev,
201 int check_abort_pending)
Dan Williamsec575662011-05-01 14:19:25 -0700202{
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700203 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williamsec575662011-05-01 14:19:25 -0700204 enum sci_status status = SCI_SUCCESS;
Dan Williams76802ce2011-06-29 09:45:48 -0700205 u32 i;
Dan Williamsec575662011-05-01 14:19:25 -0700206
Dan Williams76802ce2011-06-29 09:45:48 -0700207 for (i = 0; i < SCI_MAX_IO_REQUESTS; i++) {
Dan Williamsdb056252011-06-17 14:18:39 -0700208 struct isci_request *ireq = ihost->reqs[i];
Dan Williamsec575662011-05-01 14:19:25 -0700209 enum sci_status s;
210
Dan Williamsdb056252011-06-17 14:18:39 -0700211 if (!test_bit(IREQ_ACTIVE, &ireq->flags) ||
Jeff Skirvin726980d2012-03-08 22:41:50 -0800212 (ireq->target_device != idev) ||
213 (check_abort_pending && !test_bit(IREQ_PENDING_ABORT,
214 &ireq->flags)))
Dan Williamsec575662011-05-01 14:19:25 -0700215 continue;
Dan Williamsdb056252011-06-17 14:18:39 -0700216
Dan Williams89a73012011-06-30 19:14:33 -0700217 s = sci_controller_terminate_request(ihost, idev, ireq);
Dan Williamsec575662011-05-01 14:19:25 -0700218 if (s != SCI_SUCCESS)
219 status = s;
220 }
221
222 return status;
223}
224
Jeff Skirvin726980d2012-03-08 22:41:50 -0800225enum sci_status sci_remote_device_terminate_requests(
226 struct isci_remote_device *idev)
227{
228 return sci_remote_device_terminate_requests_checkabort(idev, 0);
229}
230
Dan Williams89a73012011-06-30 19:14:33 -0700231enum sci_status sci_remote_device_stop(struct isci_remote_device *idev,
Dan Williamsec575662011-05-01 14:19:25 -0700232 u32 timeout)
233{
Dan Williams78a6f062011-06-30 16:31:37 -0700234 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -0700235 enum sci_remote_device_states state = sm->current_state_id;
Dan Williamsec575662011-05-01 14:19:25 -0700236
237 switch (state) {
Edmund Nadolskie3013702011-06-02 00:10:43 +0000238 case SCI_DEV_INITIAL:
239 case SCI_DEV_FAILED:
240 case SCI_DEV_FINAL:
Dan Williamsec575662011-05-01 14:19:25 -0700241 default:
Dan Williamsd7a0ccd2012-02-10 01:18:44 -0800242 dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
243 __func__, dev_state_name(state));
Dan Williamsec575662011-05-01 14:19:25 -0700244 return SCI_FAILURE_INVALID_STATE;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000245 case SCI_DEV_STOPPED:
Dan Williamsec575662011-05-01 14:19:25 -0700246 return SCI_SUCCESS;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000247 case SCI_DEV_STARTING:
Dan Williamsec575662011-05-01 14:19:25 -0700248 /* device not started so there had better be no requests */
Dan Williams78a6f062011-06-30 16:31:37 -0700249 BUG_ON(idev->started_request_count != 0);
Dan Williams89a73012011-06-30 19:14:33 -0700250 sci_remote_node_context_destruct(&idev->rnc,
Dan Williams78a6f062011-06-30 16:31:37 -0700251 rnc_destruct_done, idev);
Dan Williamsec575662011-05-01 14:19:25 -0700252 /* Transition to the stopping state and wait for the
253 * remote node to complete being posted and invalidated.
254 */
Edmund Nadolskie3013702011-06-02 00:10:43 +0000255 sci_change_state(sm, SCI_DEV_STOPPING);
Dan Williamsec575662011-05-01 14:19:25 -0700256 return SCI_SUCCESS;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000257 case SCI_DEV_READY:
258 case SCI_STP_DEV_IDLE:
259 case SCI_STP_DEV_CMD:
260 case SCI_STP_DEV_NCQ:
261 case SCI_STP_DEV_NCQ_ERROR:
262 case SCI_STP_DEV_AWAIT_RESET:
263 case SCI_SMP_DEV_IDLE:
264 case SCI_SMP_DEV_CMD:
265 sci_change_state(sm, SCI_DEV_STOPPING);
Jeff Skirvin83884012012-03-08 22:41:52 -0800266 if (idev->started_request_count == 0)
Dan Williams89a73012011-06-30 19:14:33 -0700267 sci_remote_node_context_destruct(&idev->rnc,
Jeff Skirvin83884012012-03-08 22:41:52 -0800268 rnc_destruct_done,
269 idev);
270 else {
271 sci_remote_device_suspend(idev);
272 sci_remote_device_terminate_requests(idev);
273 }
274 return SCI_SUCCESS;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000275 case SCI_DEV_STOPPING:
Dan Williamsec575662011-05-01 14:19:25 -0700276 /* All requests should have been terminated, but if there is an
277 * attempt to stop a device already in the stopping state, then
278 * try again to terminate.
279 */
Dan Williams89a73012011-06-30 19:14:33 -0700280 return sci_remote_device_terminate_requests(idev);
Edmund Nadolskie3013702011-06-02 00:10:43 +0000281 case SCI_DEV_RESETTING:
282 sci_change_state(sm, SCI_DEV_STOPPING);
Dan Williamsec575662011-05-01 14:19:25 -0700283 return SCI_SUCCESS;
284 }
Dan Williams88f3b622011-04-22 19:18:03 -0700285}
Dan Williams6f231dd2011-07-02 22:56:22 -0700286
Dan Williams89a73012011-06-30 19:14:33 -0700287enum sci_status sci_remote_device_reset(struct isci_remote_device *idev)
Dan Williams88f3b622011-04-22 19:18:03 -0700288{
Dan Williams78a6f062011-06-30 16:31:37 -0700289 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -0700290 enum sci_remote_device_states state = sm->current_state_id;
Dan Williams4fd0d2e2011-05-01 14:48:54 -0700291
292 switch (state) {
Edmund Nadolskie3013702011-06-02 00:10:43 +0000293 case SCI_DEV_INITIAL:
294 case SCI_DEV_STOPPED:
295 case SCI_DEV_STARTING:
296 case SCI_SMP_DEV_IDLE:
297 case SCI_SMP_DEV_CMD:
298 case SCI_DEV_STOPPING:
299 case SCI_DEV_FAILED:
300 case SCI_DEV_RESETTING:
301 case SCI_DEV_FINAL:
Dan Williams4fd0d2e2011-05-01 14:48:54 -0700302 default:
Dan Williamsd7a0ccd2012-02-10 01:18:44 -0800303 dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
304 __func__, dev_state_name(state));
Dan Williams4fd0d2e2011-05-01 14:48:54 -0700305 return SCI_FAILURE_INVALID_STATE;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000306 case SCI_DEV_READY:
307 case SCI_STP_DEV_IDLE:
308 case SCI_STP_DEV_CMD:
309 case SCI_STP_DEV_NCQ:
310 case SCI_STP_DEV_NCQ_ERROR:
311 case SCI_STP_DEV_AWAIT_RESET:
312 sci_change_state(sm, SCI_DEV_RESETTING);
Dan Williams4fd0d2e2011-05-01 14:48:54 -0700313 return SCI_SUCCESS;
314 }
Dan Williams88f3b622011-04-22 19:18:03 -0700315}
316
Dan Williams89a73012011-06-30 19:14:33 -0700317enum sci_status sci_remote_device_reset_complete(struct isci_remote_device *idev)
Dan Williams88f3b622011-04-22 19:18:03 -0700318{
Dan Williams78a6f062011-06-30 16:31:37 -0700319 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -0700320 enum sci_remote_device_states state = sm->current_state_id;
Dan Williams88f3b622011-04-22 19:18:03 -0700321
Edmund Nadolskie3013702011-06-02 00:10:43 +0000322 if (state != SCI_DEV_RESETTING) {
Dan Williamsd7a0ccd2012-02-10 01:18:44 -0800323 dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
324 __func__, dev_state_name(state));
Dan Williams81515182011-05-01 14:53:00 -0700325 return SCI_FAILURE_INVALID_STATE;
326 }
327
Edmund Nadolskie3013702011-06-02 00:10:43 +0000328 sci_change_state(sm, SCI_DEV_READY);
Dan Williams81515182011-05-01 14:53:00 -0700329 return SCI_SUCCESS;
330}
Dan Williams88f3b622011-04-22 19:18:03 -0700331
Dan Williams89a73012011-06-30 19:14:33 -0700332enum sci_status sci_remote_device_frame_handler(struct isci_remote_device *idev,
Dan Williams01bec772011-05-01 16:51:11 -0700333 u32 frame_index)
Dan Williams88f3b622011-04-22 19:18:03 -0700334{
Dan Williams78a6f062011-06-30 16:31:37 -0700335 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -0700336 enum sci_remote_device_states state = sm->current_state_id;
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700337 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williams01bec772011-05-01 16:51:11 -0700338 enum sci_status status;
339
340 switch (state) {
Edmund Nadolskie3013702011-06-02 00:10:43 +0000341 case SCI_DEV_INITIAL:
342 case SCI_DEV_STOPPED:
343 case SCI_DEV_STARTING:
344 case SCI_STP_DEV_IDLE:
345 case SCI_SMP_DEV_IDLE:
346 case SCI_DEV_FINAL:
Dan Williams01bec772011-05-01 16:51:11 -0700347 default:
Dan Williamsd7a0ccd2012-02-10 01:18:44 -0800348 dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
349 __func__, dev_state_name(state));
Dan Williams01bec772011-05-01 16:51:11 -0700350 /* Return the frame back to the controller */
Dan Williams89a73012011-06-30 19:14:33 -0700351 sci_controller_release_frame(ihost, frame_index);
Dan Williams01bec772011-05-01 16:51:11 -0700352 return SCI_FAILURE_INVALID_STATE;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000353 case SCI_DEV_READY:
354 case SCI_STP_DEV_NCQ_ERROR:
355 case SCI_STP_DEV_AWAIT_RESET:
356 case SCI_DEV_STOPPING:
357 case SCI_DEV_FAILED:
358 case SCI_DEV_RESETTING: {
Dan Williams5076a1a2011-06-27 14:57:03 -0700359 struct isci_request *ireq;
Dave Jiang2d9c2242011-05-04 18:45:05 -0700360 struct ssp_frame_hdr hdr;
361 void *frame_header;
362 ssize_t word_cnt;
Dan Williams01bec772011-05-01 16:51:11 -0700363
Dan Williams89a73012011-06-30 19:14:33 -0700364 status = sci_unsolicited_frame_control_get_header(&ihost->uf_control,
Dan Williams01bec772011-05-01 16:51:11 -0700365 frame_index,
Dave Jiang2d9c2242011-05-04 18:45:05 -0700366 &frame_header);
Dan Williams01bec772011-05-01 16:51:11 -0700367 if (status != SCI_SUCCESS)
368 return status;
369
Dave Jiang2d9c2242011-05-04 18:45:05 -0700370 word_cnt = sizeof(hdr) / sizeof(u32);
371 sci_swab32_cpy(&hdr, frame_header, word_cnt);
372
Dan Williams89a73012011-06-30 19:14:33 -0700373 ireq = sci_request_by_tag(ihost, be16_to_cpu(hdr.tag));
Dan Williams78a6f062011-06-30 16:31:37 -0700374 if (ireq && ireq->target_device == idev) {
Dan Williams01bec772011-05-01 16:51:11 -0700375 /* The IO request is now in charge of releasing the frame */
Dan Williams89a73012011-06-30 19:14:33 -0700376 status = sci_io_request_frame_handler(ireq, frame_index);
Dan Williams01bec772011-05-01 16:51:11 -0700377 } else {
378 /* We could not map this tag to a valid IO
379 * request Just toss the frame and continue
380 */
Dan Williams89a73012011-06-30 19:14:33 -0700381 sci_controller_release_frame(ihost, frame_index);
Dan Williams01bec772011-05-01 16:51:11 -0700382 }
383 break;
384 }
Edmund Nadolskie3013702011-06-02 00:10:43 +0000385 case SCI_STP_DEV_NCQ: {
Dave Jiange76d6182011-05-04 15:02:03 -0700386 struct dev_to_host_fis *hdr;
Dan Williams01bec772011-05-01 16:51:11 -0700387
Dan Williams89a73012011-06-30 19:14:33 -0700388 status = sci_unsolicited_frame_control_get_header(&ihost->uf_control,
Dan Williams01bec772011-05-01 16:51:11 -0700389 frame_index,
390 (void **)&hdr);
391 if (status != SCI_SUCCESS)
392 return status;
393
Dave Jiange76d6182011-05-04 15:02:03 -0700394 if (hdr->fis_type == FIS_SETDEVBITS &&
395 (hdr->status & ATA_ERR)) {
Dan Williams78a6f062011-06-30 16:31:37 -0700396 idev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED;
Dan Williams01bec772011-05-01 16:51:11 -0700397
398 /* TODO Check sactive and complete associated IO if any. */
Edmund Nadolskie3013702011-06-02 00:10:43 +0000399 sci_change_state(sm, SCI_STP_DEV_NCQ_ERROR);
Dave Jiange76d6182011-05-04 15:02:03 -0700400 } else if (hdr->fis_type == FIS_REGD2H &&
401 (hdr->status & ATA_ERR)) {
Dan Williams01bec772011-05-01 16:51:11 -0700402 /*
403 * Some devices return D2H FIS when an NCQ error is detected.
404 * Treat this like an SDB error FIS ready reason.
405 */
Dan Williams78a6f062011-06-30 16:31:37 -0700406 idev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED;
407 sci_change_state(&idev->sm, SCI_STP_DEV_NCQ_ERROR);
Dan Williams01bec772011-05-01 16:51:11 -0700408 } else
409 status = SCI_FAILURE;
410
Dan Williams89a73012011-06-30 19:14:33 -0700411 sci_controller_release_frame(ihost, frame_index);
Dan Williams01bec772011-05-01 16:51:11 -0700412 break;
413 }
Edmund Nadolskie3013702011-06-02 00:10:43 +0000414 case SCI_STP_DEV_CMD:
415 case SCI_SMP_DEV_CMD:
Dan Williams01bec772011-05-01 16:51:11 -0700416 /* The device does not process any UF received from the hardware while
417 * in this state. All unsolicited frames are forwarded to the io request
418 * object.
419 */
Dan Williams89a73012011-06-30 19:14:33 -0700420 status = sci_io_request_frame_handler(idev->working_request, frame_index);
Dan Williams01bec772011-05-01 16:51:11 -0700421 break;
422 }
423
424 return status;
Dan Williams88f3b622011-04-22 19:18:03 -0700425}
426
Dan Williams78a6f062011-06-30 16:31:37 -0700427static bool is_remote_device_ready(struct isci_remote_device *idev)
Dan Williams88f3b622011-04-22 19:18:03 -0700428{
Dan Williamse6225712011-05-01 16:26:09 -0700429
Dan Williams78a6f062011-06-30 16:31:37 -0700430 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -0700431 enum sci_remote_device_states state = sm->current_state_id;
Dan Williamse6225712011-05-01 16:26:09 -0700432
433 switch (state) {
Edmund Nadolskie3013702011-06-02 00:10:43 +0000434 case SCI_DEV_READY:
435 case SCI_STP_DEV_IDLE:
436 case SCI_STP_DEV_CMD:
437 case SCI_STP_DEV_NCQ:
438 case SCI_STP_DEV_NCQ_ERROR:
439 case SCI_STP_DEV_AWAIT_RESET:
440 case SCI_SMP_DEV_IDLE:
441 case SCI_SMP_DEV_CMD:
Dan Williamse6225712011-05-01 16:26:09 -0700442 return true;
443 default:
444 return false;
445 }
446}
447
Dan Williamsb50102d2011-09-30 18:52:19 -0700448/*
449 * called once the remote node context has transisitioned to a ready
450 * state (after suspending RX and/or TX due to early D2H fis)
451 */
452static void atapi_remote_device_resume_done(void *_dev)
453{
454 struct isci_remote_device *idev = _dev;
455 struct isci_request *ireq = idev->working_request;
456
457 sci_change_state(&ireq->sm, SCI_REQ_COMPLETED);
458}
459
Dan Williams89a73012011-06-30 19:14:33 -0700460enum sci_status sci_remote_device_event_handler(struct isci_remote_device *idev,
Dan Williamse6225712011-05-01 16:26:09 -0700461 u32 event_code)
462{
Dan Williamse6225712011-05-01 16:26:09 -0700463 enum sci_status status;
464
465 switch (scu_get_event_type(event_code)) {
466 case SCU_EVENT_TYPE_RNC_OPS_MISC:
467 case SCU_EVENT_TYPE_RNC_SUSPEND_TX:
468 case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX:
Dan Williams89a73012011-06-30 19:14:33 -0700469 status = sci_remote_node_context_event_handler(&idev->rnc, event_code);
Dan Williamse6225712011-05-01 16:26:09 -0700470 break;
471 case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT:
472 if (scu_get_event_code(event_code) == SCU_EVENT_IT_NEXUS_TIMEOUT) {
473 status = SCI_SUCCESS;
474
475 /* Suspend the associated RNC */
Jeff Skirvinac78ed02012-03-08 22:41:50 -0800476 sci_remote_node_context_suspend(
477 &idev->rnc,
478 SCI_SOFTWARE_SUSPENSION,
479 SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT,
480 NULL, NULL);
Dan Williamse6225712011-05-01 16:26:09 -0700481
Dan Williams78a6f062011-06-30 16:31:37 -0700482 dev_dbg(scirdev_to_dev(idev),
Dan Williamse6225712011-05-01 16:26:09 -0700483 "%s: device: %p event code: %x: %s\n",
Dan Williams78a6f062011-06-30 16:31:37 -0700484 __func__, idev, event_code,
485 is_remote_device_ready(idev)
Dan Williamse6225712011-05-01 16:26:09 -0700486 ? "I_T_Nexus_Timeout event"
487 : "I_T_Nexus_Timeout event in wrong state");
488
489 break;
490 }
491 /* Else, fall through and treat as unhandled... */
492 default:
Dan Williams78a6f062011-06-30 16:31:37 -0700493 dev_dbg(scirdev_to_dev(idev),
Dan Williamse6225712011-05-01 16:26:09 -0700494 "%s: device: %p event code: %x: %s\n",
Dan Williams78a6f062011-06-30 16:31:37 -0700495 __func__, idev, event_code,
496 is_remote_device_ready(idev)
Dan Williamse6225712011-05-01 16:26:09 -0700497 ? "unexpected event"
498 : "unexpected event in wrong state");
499 status = SCI_FAILURE_INVALID_STATE;
500 break;
501 }
502
503 if (status != SCI_SUCCESS)
504 return status;
505
Dan Williamse6225712011-05-01 16:26:09 -0700506 return status;
Dan Williams88f3b622011-04-22 19:18:03 -0700507}
508
Dan Williams89a73012011-06-30 19:14:33 -0700509static void sci_remote_device_start_request(struct isci_remote_device *idev,
Dan Williams5076a1a2011-06-27 14:57:03 -0700510 struct isci_request *ireq,
Dan Williams18606552011-05-01 14:57:11 -0700511 enum sci_status status)
Dan Williams88f3b622011-04-22 19:18:03 -0700512{
Dan Williams78a6f062011-06-30 16:31:37 -0700513 struct isci_port *iport = idev->owning_port;
Dan Williams18606552011-05-01 14:57:11 -0700514
515 /* cleanup requests that failed after starting on the port */
516 if (status != SCI_SUCCESS)
Dan Williams89a73012011-06-30 19:14:33 -0700517 sci_port_complete_io(iport, idev, ireq);
Dan Williams209fae12011-06-13 17:39:44 -0700518 else {
Dan Williams78a6f062011-06-30 16:31:37 -0700519 kref_get(&idev->kref);
Dan Williams34a99152011-07-01 02:25:15 -0700520 idev->started_request_count++;
Dan Williams209fae12011-06-13 17:39:44 -0700521 }
Dan Williams18606552011-05-01 14:57:11 -0700522}
523
Dan Williams89a73012011-06-30 19:14:33 -0700524enum sci_status sci_remote_device_start_io(struct isci_host *ihost,
Dan Williams78a6f062011-06-30 16:31:37 -0700525 struct isci_remote_device *idev,
Dan Williams5076a1a2011-06-27 14:57:03 -0700526 struct isci_request *ireq)
Dan Williams18606552011-05-01 14:57:11 -0700527{
Dan Williams78a6f062011-06-30 16:31:37 -0700528 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -0700529 enum sci_remote_device_states state = sm->current_state_id;
Dan Williams78a6f062011-06-30 16:31:37 -0700530 struct isci_port *iport = idev->owning_port;
Dan Williams18606552011-05-01 14:57:11 -0700531 enum sci_status status;
532
533 switch (state) {
Edmund Nadolskie3013702011-06-02 00:10:43 +0000534 case SCI_DEV_INITIAL:
535 case SCI_DEV_STOPPED:
536 case SCI_DEV_STARTING:
537 case SCI_STP_DEV_NCQ_ERROR:
538 case SCI_DEV_STOPPING:
539 case SCI_DEV_FAILED:
540 case SCI_DEV_RESETTING:
541 case SCI_DEV_FINAL:
Dan Williams18606552011-05-01 14:57:11 -0700542 default:
Dan Williamsd7a0ccd2012-02-10 01:18:44 -0800543 dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
544 __func__, dev_state_name(state));
Dan Williams18606552011-05-01 14:57:11 -0700545 return SCI_FAILURE_INVALID_STATE;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000546 case SCI_DEV_READY:
Dan Williams18606552011-05-01 14:57:11 -0700547 /* attempt to start an io request for this device object. The remote
548 * device object will issue the start request for the io and if
549 * successful it will start the request for the port object then
550 * increment its own request count.
551 */
Dan Williams89a73012011-06-30 19:14:33 -0700552 status = sci_port_start_io(iport, idev, ireq);
Dan Williams18606552011-05-01 14:57:11 -0700553 if (status != SCI_SUCCESS)
554 return status;
555
Dan Williams89a73012011-06-30 19:14:33 -0700556 status = sci_remote_node_context_start_io(&idev->rnc, ireq);
Dan Williams18606552011-05-01 14:57:11 -0700557 if (status != SCI_SUCCESS)
558 break;
559
Dan Williams89a73012011-06-30 19:14:33 -0700560 status = sci_request_start(ireq);
Dan Williams18606552011-05-01 14:57:11 -0700561 break;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000562 case SCI_STP_DEV_IDLE: {
Dan Williams18606552011-05-01 14:57:11 -0700563 /* handle the start io operation for a sata device that is in
564 * the command idle state. - Evalute the type of IO request to
565 * be started - If its an NCQ request change to NCQ substate -
566 * If its any other command change to the CMD substate
567 *
568 * If this is a softreset we may want to have a different
569 * substate.
570 */
Dan Williams89a73012011-06-30 19:14:33 -0700571 enum sci_remote_device_states new_state;
Dave Jiange76d6182011-05-04 15:02:03 -0700572 struct sas_task *task = isci_request_access_task(ireq);
Dan Williams18606552011-05-01 14:57:11 -0700573
Dan Williams89a73012011-06-30 19:14:33 -0700574 status = sci_port_start_io(iport, idev, ireq);
Dan Williams18606552011-05-01 14:57:11 -0700575 if (status != SCI_SUCCESS)
576 return status;
577
Dan Williams89a73012011-06-30 19:14:33 -0700578 status = sci_remote_node_context_start_io(&idev->rnc, ireq);
Dan Williams18606552011-05-01 14:57:11 -0700579 if (status != SCI_SUCCESS)
580 break;
581
Dan Williams89a73012011-06-30 19:14:33 -0700582 status = sci_request_start(ireq);
Dan Williams18606552011-05-01 14:57:11 -0700583 if (status != SCI_SUCCESS)
584 break;
585
Dave Jiange76d6182011-05-04 15:02:03 -0700586 if (task->ata_task.use_ncq)
Edmund Nadolskie3013702011-06-02 00:10:43 +0000587 new_state = SCI_STP_DEV_NCQ;
Dan Williams18606552011-05-01 14:57:11 -0700588 else {
Dan Williams78a6f062011-06-30 16:31:37 -0700589 idev->working_request = ireq;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000590 new_state = SCI_STP_DEV_CMD;
Dan Williams18606552011-05-01 14:57:11 -0700591 }
Edmund Nadolskie3013702011-06-02 00:10:43 +0000592 sci_change_state(sm, new_state);
Dan Williams18606552011-05-01 14:57:11 -0700593 break;
594 }
Edmund Nadolskie3013702011-06-02 00:10:43 +0000595 case SCI_STP_DEV_NCQ: {
Dave Jiange76d6182011-05-04 15:02:03 -0700596 struct sas_task *task = isci_request_access_task(ireq);
597
598 if (task->ata_task.use_ncq) {
Dan Williams89a73012011-06-30 19:14:33 -0700599 status = sci_port_start_io(iport, idev, ireq);
Dan Williams18606552011-05-01 14:57:11 -0700600 if (status != SCI_SUCCESS)
601 return status;
602
Dan Williams89a73012011-06-30 19:14:33 -0700603 status = sci_remote_node_context_start_io(&idev->rnc, ireq);
Dan Williams18606552011-05-01 14:57:11 -0700604 if (status != SCI_SUCCESS)
605 break;
606
Dan Williams89a73012011-06-30 19:14:33 -0700607 status = sci_request_start(ireq);
Dan Williams18606552011-05-01 14:57:11 -0700608 } else
609 return SCI_FAILURE_INVALID_STATE;
610 break;
Dave Jiange76d6182011-05-04 15:02:03 -0700611 }
Edmund Nadolskie3013702011-06-02 00:10:43 +0000612 case SCI_STP_DEV_AWAIT_RESET:
Dan Williams18606552011-05-01 14:57:11 -0700613 return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000614 case SCI_SMP_DEV_IDLE:
Dan Williams89a73012011-06-30 19:14:33 -0700615 status = sci_port_start_io(iport, idev, ireq);
Dan Williams18606552011-05-01 14:57:11 -0700616 if (status != SCI_SUCCESS)
617 return status;
618
Dan Williams89a73012011-06-30 19:14:33 -0700619 status = sci_remote_node_context_start_io(&idev->rnc, ireq);
Dan Williams18606552011-05-01 14:57:11 -0700620 if (status != SCI_SUCCESS)
621 break;
622
Dan Williams89a73012011-06-30 19:14:33 -0700623 status = sci_request_start(ireq);
Dan Williams18606552011-05-01 14:57:11 -0700624 if (status != SCI_SUCCESS)
625 break;
626
Dan Williams78a6f062011-06-30 16:31:37 -0700627 idev->working_request = ireq;
628 sci_change_state(&idev->sm, SCI_SMP_DEV_CMD);
Dan Williams18606552011-05-01 14:57:11 -0700629 break;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000630 case SCI_STP_DEV_CMD:
631 case SCI_SMP_DEV_CMD:
Dan Williams18606552011-05-01 14:57:11 -0700632 /* device is already handling a command it can not accept new commands
633 * until this one is complete.
634 */
635 return SCI_FAILURE_INVALID_STATE;
636 }
637
Dan Williams89a73012011-06-30 19:14:33 -0700638 sci_remote_device_start_request(idev, ireq, status);
Dan Williams18606552011-05-01 14:57:11 -0700639 return status;
Dan Williams88f3b622011-04-22 19:18:03 -0700640}
641
Dan Williamsffe191c2011-06-29 13:09:25 -0700642static enum sci_status common_complete_io(struct isci_port *iport,
Dan Williams78a6f062011-06-30 16:31:37 -0700643 struct isci_remote_device *idev,
Dan Williams5076a1a2011-06-27 14:57:03 -0700644 struct isci_request *ireq)
Dan Williams88f3b622011-04-22 19:18:03 -0700645{
Dan Williams10a09e62011-05-01 15:33:43 -0700646 enum sci_status status;
647
Dan Williams89a73012011-06-30 19:14:33 -0700648 status = sci_request_complete(ireq);
Dan Williams10a09e62011-05-01 15:33:43 -0700649 if (status != SCI_SUCCESS)
650 return status;
651
Dan Williams89a73012011-06-30 19:14:33 -0700652 status = sci_port_complete_io(iport, idev, ireq);
Dan Williams10a09e62011-05-01 15:33:43 -0700653 if (status != SCI_SUCCESS)
654 return status;
655
Dan Williams89a73012011-06-30 19:14:33 -0700656 sci_remote_device_decrement_request_count(idev);
Dan Williams10a09e62011-05-01 15:33:43 -0700657 return status;
658}
659
Dan Williams89a73012011-06-30 19:14:33 -0700660enum sci_status sci_remote_device_complete_io(struct isci_host *ihost,
Dan Williams78a6f062011-06-30 16:31:37 -0700661 struct isci_remote_device *idev,
Dan Williams5076a1a2011-06-27 14:57:03 -0700662 struct isci_request *ireq)
Dan Williams10a09e62011-05-01 15:33:43 -0700663{
Dan Williams78a6f062011-06-30 16:31:37 -0700664 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -0700665 enum sci_remote_device_states state = sm->current_state_id;
Dan Williams78a6f062011-06-30 16:31:37 -0700666 struct isci_port *iport = idev->owning_port;
Dan Williams10a09e62011-05-01 15:33:43 -0700667 enum sci_status status;
668
669 switch (state) {
Edmund Nadolskie3013702011-06-02 00:10:43 +0000670 case SCI_DEV_INITIAL:
671 case SCI_DEV_STOPPED:
672 case SCI_DEV_STARTING:
673 case SCI_STP_DEV_IDLE:
674 case SCI_SMP_DEV_IDLE:
675 case SCI_DEV_FAILED:
676 case SCI_DEV_FINAL:
Dan Williams10a09e62011-05-01 15:33:43 -0700677 default:
Dan Williamsd7a0ccd2012-02-10 01:18:44 -0800678 dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
679 __func__, dev_state_name(state));
Dan Williams10a09e62011-05-01 15:33:43 -0700680 return SCI_FAILURE_INVALID_STATE;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000681 case SCI_DEV_READY:
682 case SCI_STP_DEV_AWAIT_RESET:
683 case SCI_DEV_RESETTING:
Dan Williams78a6f062011-06-30 16:31:37 -0700684 status = common_complete_io(iport, idev, ireq);
Dan Williams10a09e62011-05-01 15:33:43 -0700685 break;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000686 case SCI_STP_DEV_CMD:
687 case SCI_STP_DEV_NCQ:
688 case SCI_STP_DEV_NCQ_ERROR:
Dan Williamsb50102d2011-09-30 18:52:19 -0700689 case SCI_STP_DEV_ATAPI_ERROR:
Dan Williams78a6f062011-06-30 16:31:37 -0700690 status = common_complete_io(iport, idev, ireq);
Dan Williams10a09e62011-05-01 15:33:43 -0700691 if (status != SCI_SUCCESS)
692 break;
693
Dan Williams5076a1a2011-06-27 14:57:03 -0700694 if (ireq->sci_status == SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
Dan Williams10a09e62011-05-01 15:33:43 -0700695 /* This request causes hardware error, device needs to be Lun Reset.
696 * So here we force the state machine to IDLE state so the rest IOs
697 * can reach RNC state handler, these IOs will be completed by RNC with
698 * status of "DEVICE_RESET_REQUIRED", instead of "INVALID STATE".
699 */
Edmund Nadolskie3013702011-06-02 00:10:43 +0000700 sci_change_state(sm, SCI_STP_DEV_AWAIT_RESET);
Dan Williams34a99152011-07-01 02:25:15 -0700701 } else if (idev->started_request_count == 0)
Edmund Nadolskie3013702011-06-02 00:10:43 +0000702 sci_change_state(sm, SCI_STP_DEV_IDLE);
Dan Williams10a09e62011-05-01 15:33:43 -0700703 break;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000704 case SCI_SMP_DEV_CMD:
Dan Williams78a6f062011-06-30 16:31:37 -0700705 status = common_complete_io(iport, idev, ireq);
Dan Williams10a09e62011-05-01 15:33:43 -0700706 if (status != SCI_SUCCESS)
707 break;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000708 sci_change_state(sm, SCI_SMP_DEV_IDLE);
Dan Williams10a09e62011-05-01 15:33:43 -0700709 break;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000710 case SCI_DEV_STOPPING:
Dan Williams78a6f062011-06-30 16:31:37 -0700711 status = common_complete_io(iport, idev, ireq);
Dan Williams10a09e62011-05-01 15:33:43 -0700712 if (status != SCI_SUCCESS)
713 break;
714
Dan Williams34a99152011-07-01 02:25:15 -0700715 if (idev->started_request_count == 0)
Dan Williams89a73012011-06-30 19:14:33 -0700716 sci_remote_node_context_destruct(&idev->rnc,
Dan Williams34a99152011-07-01 02:25:15 -0700717 rnc_destruct_done,
718 idev);
Dan Williams10a09e62011-05-01 15:33:43 -0700719 break;
720 }
721
722 if (status != SCI_SUCCESS)
Dan Williams78a6f062011-06-30 16:31:37 -0700723 dev_err(scirdev_to_dev(idev),
Dan Williams10a09e62011-05-01 15:33:43 -0700724 "%s: Port:0x%p Device:0x%p Request:0x%p Status:0x%x "
Dan Williamsffe191c2011-06-29 13:09:25 -0700725 "could not complete\n", __func__, iport,
Dan Williams78a6f062011-06-30 16:31:37 -0700726 idev, ireq, status);
Dan Williams209fae12011-06-13 17:39:44 -0700727 else
Dan Williams78a6f062011-06-30 16:31:37 -0700728 isci_put_device(idev);
Dan Williams10a09e62011-05-01 15:33:43 -0700729
730 return status;
Dan Williams88f3b622011-04-22 19:18:03 -0700731}
732
Dan Williams89a73012011-06-30 19:14:33 -0700733static void sci_remote_device_continue_request(void *dev)
Dan Williams88f3b622011-04-22 19:18:03 -0700734{
Dan Williams78a6f062011-06-30 16:31:37 -0700735 struct isci_remote_device *idev = dev;
Dan Williams84b9b022011-05-01 15:53:25 -0700736
737 /* we need to check if this request is still valid to continue. */
Dan Williams78a6f062011-06-30 16:31:37 -0700738 if (idev->working_request)
Dan Williams89a73012011-06-30 19:14:33 -0700739 sci_controller_continue_io(idev->working_request);
Dan Williams84b9b022011-05-01 15:53:25 -0700740}
741
Dan Williams89a73012011-06-30 19:14:33 -0700742enum sci_status sci_remote_device_start_task(struct isci_host *ihost,
Dan Williams78a6f062011-06-30 16:31:37 -0700743 struct isci_remote_device *idev,
Dan Williams5076a1a2011-06-27 14:57:03 -0700744 struct isci_request *ireq)
Dan Williams84b9b022011-05-01 15:53:25 -0700745{
Dan Williams78a6f062011-06-30 16:31:37 -0700746 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -0700747 enum sci_remote_device_states state = sm->current_state_id;
Dan Williams78a6f062011-06-30 16:31:37 -0700748 struct isci_port *iport = idev->owning_port;
Dan Williams84b9b022011-05-01 15:53:25 -0700749 enum sci_status status;
750
751 switch (state) {
Edmund Nadolskie3013702011-06-02 00:10:43 +0000752 case SCI_DEV_INITIAL:
753 case SCI_DEV_STOPPED:
754 case SCI_DEV_STARTING:
755 case SCI_SMP_DEV_IDLE:
756 case SCI_SMP_DEV_CMD:
757 case SCI_DEV_STOPPING:
758 case SCI_DEV_FAILED:
759 case SCI_DEV_RESETTING:
760 case SCI_DEV_FINAL:
Dan Williams84b9b022011-05-01 15:53:25 -0700761 default:
Dan Williamsd7a0ccd2012-02-10 01:18:44 -0800762 dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
763 __func__, dev_state_name(state));
Dan Williams84b9b022011-05-01 15:53:25 -0700764 return SCI_FAILURE_INVALID_STATE;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000765 case SCI_STP_DEV_IDLE:
766 case SCI_STP_DEV_CMD:
767 case SCI_STP_DEV_NCQ:
768 case SCI_STP_DEV_NCQ_ERROR:
769 case SCI_STP_DEV_AWAIT_RESET:
Dan Williams89a73012011-06-30 19:14:33 -0700770 status = sci_port_start_io(iport, idev, ireq);
Dan Williams84b9b022011-05-01 15:53:25 -0700771 if (status != SCI_SUCCESS)
772 return status;
773
Dan Williams89a73012011-06-30 19:14:33 -0700774 status = sci_remote_node_context_start_task(&idev->rnc, ireq);
Dan Williams84b9b022011-05-01 15:53:25 -0700775 if (status != SCI_SUCCESS)
776 goto out;
777
Dan Williams89a73012011-06-30 19:14:33 -0700778 status = sci_request_start(ireq);
Dan Williams84b9b022011-05-01 15:53:25 -0700779 if (status != SCI_SUCCESS)
780 goto out;
781
782 /* Note: If the remote device state is not IDLE this will
783 * replace the request that probably resulted in the task
784 * management request.
785 */
Dan Williams78a6f062011-06-30 16:31:37 -0700786 idev->working_request = ireq;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000787 sci_change_state(sm, SCI_STP_DEV_CMD);
Dan Williams84b9b022011-05-01 15:53:25 -0700788
789 /* The remote node context must cleanup the TCi to NCQ mapping
790 * table. The only way to do this correctly is to either write
791 * to the TLCR register or to invalidate and repost the RNC. In
792 * either case the remote node context state machine will take
793 * the correct action when the remote node context is suspended
794 * and later resumed.
795 */
Jeff Skirvinac78ed02012-03-08 22:41:50 -0800796 sci_remote_node_context_suspend(
797 &idev->rnc, SCI_SOFTWARE_SUSPENSION,
798 SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT, NULL, NULL);
799 sci_remote_node_context_resume(
800 &idev->rnc, sci_remote_device_continue_request, idev);
Dan Williams84b9b022011-05-01 15:53:25 -0700801
802 out:
Dan Williams89a73012011-06-30 19:14:33 -0700803 sci_remote_device_start_request(idev, ireq, status);
Dan Williams84b9b022011-05-01 15:53:25 -0700804 /* We need to let the controller start request handler know that
805 * it can't post TC yet. We will provide a callback function to
806 * post TC when RNC gets resumed.
807 */
808 return SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000809 case SCI_DEV_READY:
Dan Williams89a73012011-06-30 19:14:33 -0700810 status = sci_port_start_io(iport, idev, ireq);
Dan Williams84b9b022011-05-01 15:53:25 -0700811 if (status != SCI_SUCCESS)
812 return status;
813
Dan Williams89a73012011-06-30 19:14:33 -0700814 status = sci_remote_node_context_start_task(&idev->rnc, ireq);
Dan Williams84b9b022011-05-01 15:53:25 -0700815 if (status != SCI_SUCCESS)
816 break;
817
Dan Williams89a73012011-06-30 19:14:33 -0700818 status = sci_request_start(ireq);
Dan Williams84b9b022011-05-01 15:53:25 -0700819 break;
820 }
Dan Williams89a73012011-06-30 19:14:33 -0700821 sci_remote_device_start_request(idev, ireq, status);
Dan Williams84b9b022011-05-01 15:53:25 -0700822
823 return status;
Dan Williams88f3b622011-04-22 19:18:03 -0700824}
825
Dan Williams34a99152011-07-01 02:25:15 -0700826void sci_remote_device_post_request(struct isci_remote_device *idev, u32 request)
Dan Williams88f3b622011-04-22 19:18:03 -0700827{
Dan Williams34a99152011-07-01 02:25:15 -0700828 struct isci_port *iport = idev->owning_port;
Dan Williams88f3b622011-04-22 19:18:03 -0700829 u32 context;
830
Dan Williams34a99152011-07-01 02:25:15 -0700831 context = request |
832 (ISCI_PEG << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) |
833 (iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) |
834 idev->rnc.remote_node_index;
Dan Williams88f3b622011-04-22 19:18:03 -0700835
Dan Williams34a99152011-07-01 02:25:15 -0700836 sci_controller_post_request(iport->owning_controller, context);
Dan Williams88f3b622011-04-22 19:18:03 -0700837}
838
Dan Williamsab2e8f72011-04-27 16:32:45 -0700839/* called once the remote node context has transisitioned to a
Dan Williams88f3b622011-04-22 19:18:03 -0700840 * ready state. This is the indication that the remote device object can also
Dan Williamsab2e8f72011-04-27 16:32:45 -0700841 * transition to ready.
Dan Williams88f3b622011-04-22 19:18:03 -0700842 */
Dan Williamseb229672011-05-01 14:05:57 -0700843static void remote_device_resume_done(void *_dev)
Dan Williams88f3b622011-04-22 19:18:03 -0700844{
Dan Williams78a6f062011-06-30 16:31:37 -0700845 struct isci_remote_device *idev = _dev;
Dan Williams88f3b622011-04-22 19:18:03 -0700846
Dan Williams78a6f062011-06-30 16:31:37 -0700847 if (is_remote_device_ready(idev))
Dan Williamse6225712011-05-01 16:26:09 -0700848 return;
Dan Williams88f3b622011-04-22 19:18:03 -0700849
Dan Williamse6225712011-05-01 16:26:09 -0700850 /* go 'ready' if we are not already in a ready state */
Dan Williams78a6f062011-06-30 16:31:37 -0700851 sci_change_state(&idev->sm, SCI_DEV_READY);
Dan Williams88f3b622011-04-22 19:18:03 -0700852}
853
Dan Williams89a73012011-06-30 19:14:33 -0700854static void sci_stp_remote_device_ready_idle_substate_resume_complete_handler(void *_dev)
Dan Williamsab2e8f72011-04-27 16:32:45 -0700855{
Dan Williams78a6f062011-06-30 16:31:37 -0700856 struct isci_remote_device *idev = _dev;
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700857 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williamsab2e8f72011-04-27 16:32:45 -0700858
859 /* For NCQ operation we do not issue a isci_remote_device_not_ready().
860 * As a result, avoid sending the ready notification.
861 */
Dan Williams78a6f062011-06-30 16:31:37 -0700862 if (idev->sm.previous_state_id != SCI_STP_DEV_NCQ)
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700863 isci_remote_device_ready(ihost, idev);
Dan Williamsab2e8f72011-04-27 16:32:45 -0700864}
865
Dan Williams89a73012011-06-30 19:14:33 -0700866static void sci_remote_device_initial_state_enter(struct sci_base_state_machine *sm)
Dan Williams88f3b622011-04-22 19:18:03 -0700867{
Dan Williams78a6f062011-06-30 16:31:37 -0700868 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williams88f3b622011-04-22 19:18:03 -0700869
Dan Williams88f3b622011-04-22 19:18:03 -0700870 /* Initial state is a transitional state to the stopped state */
Dan Williams78a6f062011-06-30 16:31:37 -0700871 sci_change_state(&idev->sm, SCI_DEV_STOPPED);
Dan Williams88f3b622011-04-22 19:18:03 -0700872}
873
874/**
Dan Williams89a73012011-06-30 19:14:33 -0700875 * sci_remote_device_destruct() - free remote node context and destruct
Dan Williams88f3b622011-04-22 19:18:03 -0700876 * @remote_device: This parameter specifies the remote device to be destructed.
877 *
878 * Remote device objects are a limited resource. As such, they must be
879 * protected. Thus calls to construct and destruct are mutually exclusive and
880 * non-reentrant. The return value shall indicate if the device was
881 * successfully destructed or if some failure occurred. enum sci_status This value
882 * is returned if the device is successfully destructed.
883 * SCI_FAILURE_INVALID_REMOTE_DEVICE This value is returned if the supplied
884 * device isn't valid (e.g. it's already been destoryed, the handle isn't
885 * valid, etc.).
886 */
Dan Williams89a73012011-06-30 19:14:33 -0700887static enum sci_status sci_remote_device_destruct(struct isci_remote_device *idev)
Dan Williams88f3b622011-04-22 19:18:03 -0700888{
Dan Williams78a6f062011-06-30 16:31:37 -0700889 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -0700890 enum sci_remote_device_states state = sm->current_state_id;
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700891 struct isci_host *ihost;
Dan Williamsb8d82f62011-05-01 14:38:26 -0700892
Edmund Nadolskie3013702011-06-02 00:10:43 +0000893 if (state != SCI_DEV_STOPPED) {
Dan Williamsd7a0ccd2012-02-10 01:18:44 -0800894 dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
895 __func__, dev_state_name(state));
Dan Williamsb8d82f62011-05-01 14:38:26 -0700896 return SCI_FAILURE_INVALID_STATE;
897 }
898
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700899 ihost = idev->owning_port->owning_controller;
Dan Williams89a73012011-06-30 19:14:33 -0700900 sci_controller_free_remote_node_context(ihost, idev,
Dan Williams78a6f062011-06-30 16:31:37 -0700901 idev->rnc.remote_node_index);
902 idev->rnc.remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000903 sci_change_state(sm, SCI_DEV_FINAL);
Dan Williamsb8d82f62011-05-01 14:38:26 -0700904
905 return SCI_SUCCESS;
Dan Williams88f3b622011-04-22 19:18:03 -0700906}
907
Dan Williams6f231dd2011-07-02 22:56:22 -0700908/**
909 * isci_remote_device_deconstruct() - This function frees an isci_remote_device.
Dan Williamsd9c37392011-03-03 17:59:32 -0800910 * @ihost: This parameter specifies the isci host object.
911 * @idev: This parameter specifies the remote device to be freed.
Dan Williams6f231dd2011-07-02 22:56:22 -0700912 *
913 */
Dan Williamsd9c37392011-03-03 17:59:32 -0800914static void isci_remote_device_deconstruct(struct isci_host *ihost, struct isci_remote_device *idev)
Dan Williams6f231dd2011-07-02 22:56:22 -0700915{
Dan Williamsd9c37392011-03-03 17:59:32 -0800916 dev_dbg(&ihost->pdev->dev,
917 "%s: isci_device = %p\n", __func__, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -0700918
919 /* There should not be any outstanding io's. All paths to
920 * here should go through isci_remote_device_nuke_requests.
921 * If we hit this condition, we will need a way to complete
922 * io requests in process */
Dan Williams209fae12011-06-13 17:39:44 -0700923 BUG_ON(!list_empty(&idev->reqs_in_process));
Dan Williams6f231dd2011-07-02 22:56:22 -0700924
Dan Williams89a73012011-06-30 19:14:33 -0700925 sci_remote_device_destruct(idev);
Dan Williamsd9c37392011-03-03 17:59:32 -0800926 list_del_init(&idev->node);
Dan Williams209fae12011-06-13 17:39:44 -0700927 isci_put_device(idev);
Dan Williams6f231dd2011-07-02 22:56:22 -0700928}
929
Dan Williams89a73012011-06-30 19:14:33 -0700930static void sci_remote_device_stopped_state_enter(struct sci_base_state_machine *sm)
Dan Williams88f3b622011-04-22 19:18:03 -0700931{
Dan Williams78a6f062011-06-30 16:31:37 -0700932 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700933 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williams88f3b622011-04-22 19:18:03 -0700934 u32 prev_state;
935
Dan Williams88f3b622011-04-22 19:18:03 -0700936 /* If we are entering from the stopping state let the SCI User know that
937 * the stop operation has completed.
938 */
Dan Williams78a6f062011-06-30 16:31:37 -0700939 prev_state = idev->sm.previous_state_id;
Edmund Nadolskie3013702011-06-02 00:10:43 +0000940 if (prev_state == SCI_DEV_STOPPING)
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700941 isci_remote_device_deconstruct(ihost, idev);
Dan Williams88f3b622011-04-22 19:18:03 -0700942
Dan Williams89a73012011-06-30 19:14:33 -0700943 sci_controller_remote_device_stopped(ihost, idev);
Dan Williams88f3b622011-04-22 19:18:03 -0700944}
945
Dan Williams89a73012011-06-30 19:14:33 -0700946static void sci_remote_device_starting_state_enter(struct sci_base_state_machine *sm)
Dan Williams88f3b622011-04-22 19:18:03 -0700947{
Dan Williams78a6f062011-06-30 16:31:37 -0700948 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williams34a99152011-07-01 02:25:15 -0700949 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williams88f3b622011-04-22 19:18:03 -0700950
Dan Williams88f3b622011-04-22 19:18:03 -0700951 isci_remote_device_not_ready(ihost, idev,
952 SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED);
953}
954
Dan Williams89a73012011-06-30 19:14:33 -0700955static void sci_remote_device_ready_state_enter(struct sci_base_state_machine *sm)
Dan Williams88f3b622011-04-22 19:18:03 -0700956{
Dan Williams78a6f062011-06-30 16:31:37 -0700957 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700958 struct isci_host *ihost = idev->owning_port->owning_controller;
Artur Wojcikcc3dbd02011-05-04 07:58:16 +0000959 struct domain_device *dev = idev->domain_dev;
Dan Williams88f3b622011-04-22 19:18:03 -0700960
Dan Williamsab2e8f72011-04-27 16:32:45 -0700961 if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_SATA)) {
Dan Williams78a6f062011-06-30 16:31:37 -0700962 sci_change_state(&idev->sm, SCI_STP_DEV_IDLE);
Dan Williamsab2e8f72011-04-27 16:32:45 -0700963 } else if (dev_is_expander(dev)) {
Dan Williams78a6f062011-06-30 16:31:37 -0700964 sci_change_state(&idev->sm, SCI_SMP_DEV_IDLE);
Dan Williamsab2e8f72011-04-27 16:32:45 -0700965 } else
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700966 isci_remote_device_ready(ihost, idev);
Dan Williams88f3b622011-04-22 19:18:03 -0700967}
968
Dan Williams89a73012011-06-30 19:14:33 -0700969static void sci_remote_device_ready_state_exit(struct sci_base_state_machine *sm)
Dan Williams88f3b622011-04-22 19:18:03 -0700970{
Dan Williams78a6f062011-06-30 16:31:37 -0700971 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
972 struct domain_device *dev = idev->domain_dev;
Dan Williamsab2e8f72011-04-27 16:32:45 -0700973
974 if (dev->dev_type == SAS_END_DEV) {
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700975 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williams88f3b622011-04-22 19:18:03 -0700976
Dan Williamsd9dcb4b2011-06-30 17:38:32 -0700977 isci_remote_device_not_ready(ihost, idev,
Dan Williams88f3b622011-04-22 19:18:03 -0700978 SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED);
979 }
980}
981
Dan Williams89a73012011-06-30 19:14:33 -0700982static void sci_remote_device_resetting_state_enter(struct sci_base_state_machine *sm)
Dan Williams88f3b622011-04-22 19:18:03 -0700983{
Dan Williams78a6f062011-06-30 16:31:37 -0700984 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Jeff Skirvinac78ed02012-03-08 22:41:50 -0800985 struct isci_host *ihost = idev->owning_port->owning_controller;
986
987 dev_dbg(&ihost->pdev->dev,
988 "%s: isci_device = %p\n", __func__, idev);
Dan Williams88f3b622011-04-22 19:18:03 -0700989
Dan Williams89a73012011-06-30 19:14:33 -0700990 sci_remote_node_context_suspend(
Jeff Skirvinac78ed02012-03-08 22:41:50 -0800991 &idev->rnc, SCI_SOFTWARE_SUSPENSION,
992 SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT, NULL, NULL);
Dan Williams88f3b622011-04-22 19:18:03 -0700993}
994
Dan Williams89a73012011-06-30 19:14:33 -0700995static void sci_remote_device_resetting_state_exit(struct sci_base_state_machine *sm)
Dan Williams88f3b622011-04-22 19:18:03 -0700996{
Dan Williams78a6f062011-06-30 16:31:37 -0700997 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Jeff Skirvinac78ed02012-03-08 22:41:50 -0800998 struct isci_host *ihost = idev->owning_port->owning_controller;
999
1000 dev_dbg(&ihost->pdev->dev,
1001 "%s: isci_device = %p\n", __func__, idev);
Dan Williams88f3b622011-04-22 19:18:03 -07001002
Dan Williams89a73012011-06-30 19:14:33 -07001003 sci_remote_node_context_resume(&idev->rnc, NULL, NULL);
Dan Williams88f3b622011-04-22 19:18:03 -07001004}
1005
Dan Williams89a73012011-06-30 19:14:33 -07001006static void sci_stp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm)
Dan Williamsab2e8f72011-04-27 16:32:45 -07001007{
Dan Williams78a6f062011-06-30 16:31:37 -07001008 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williamsab2e8f72011-04-27 16:32:45 -07001009
Dan Williams78a6f062011-06-30 16:31:37 -07001010 idev->working_request = NULL;
Dan Williams89a73012011-06-30 19:14:33 -07001011 if (sci_remote_node_context_is_ready(&idev->rnc)) {
Dan Williamsab2e8f72011-04-27 16:32:45 -07001012 /*
1013 * Since the RNC is ready, it's alright to finish completion
1014 * processing (e.g. signal the remote device is ready). */
Dan Williams89a73012011-06-30 19:14:33 -07001015 sci_stp_remote_device_ready_idle_substate_resume_complete_handler(idev);
Dan Williamsab2e8f72011-04-27 16:32:45 -07001016 } else {
Dan Williams89a73012011-06-30 19:14:33 -07001017 sci_remote_node_context_resume(&idev->rnc,
1018 sci_stp_remote_device_ready_idle_substate_resume_complete_handler,
Dan Williams78a6f062011-06-30 16:31:37 -07001019 idev);
Dan Williamsab2e8f72011-04-27 16:32:45 -07001020 }
1021}
1022
Dan Williams89a73012011-06-30 19:14:33 -07001023static void sci_stp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm)
Dan Williamsab2e8f72011-04-27 16:32:45 -07001024{
Dan Williams78a6f062011-06-30 16:31:37 -07001025 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williams34a99152011-07-01 02:25:15 -07001026 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williamsab2e8f72011-04-27 16:32:45 -07001027
Dan Williams78a6f062011-06-30 16:31:37 -07001028 BUG_ON(idev->working_request == NULL);
Dan Williamsab2e8f72011-04-27 16:32:45 -07001029
Dan Williamsd9dcb4b2011-06-30 17:38:32 -07001030 isci_remote_device_not_ready(ihost, idev,
Dan Williamsab2e8f72011-04-27 16:32:45 -07001031 SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED);
1032}
1033
Dan Williams89a73012011-06-30 19:14:33 -07001034static void sci_stp_remote_device_ready_ncq_error_substate_enter(struct sci_base_state_machine *sm)
Dan Williamsab2e8f72011-04-27 16:32:45 -07001035{
Dan Williams78a6f062011-06-30 16:31:37 -07001036 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williams34a99152011-07-01 02:25:15 -07001037 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williamsab2e8f72011-04-27 16:32:45 -07001038
Dan Williams78a6f062011-06-30 16:31:37 -07001039 if (idev->not_ready_reason == SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED)
Dan Williamsd9dcb4b2011-06-30 17:38:32 -07001040 isci_remote_device_not_ready(ihost, idev,
Dan Williams78a6f062011-06-30 16:31:37 -07001041 idev->not_ready_reason);
Dan Williamsab2e8f72011-04-27 16:32:45 -07001042}
1043
Jeff Skirvinac78ed02012-03-08 22:41:50 -08001044static void sci_stp_remote_device_atapi_error_substate_enter(
1045 struct sci_base_state_machine *sm)
1046{
1047 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
1048
1049 /* This state is entered when an I/O is decoded with an error
1050 * condition. By this point the RNC expected suspension state is set.
1051 * The error conditions suspend the device, so unsuspend here if
1052 * possible.
1053 */
1054 sci_remote_node_context_resume(&idev->rnc,
1055 atapi_remote_device_resume_done,
1056 idev);
1057}
1058
Dan Williams89a73012011-06-30 19:14:33 -07001059static void sci_smp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm)
Dan Williamsab2e8f72011-04-27 16:32:45 -07001060{
Dan Williams78a6f062011-06-30 16:31:37 -07001061 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williams34a99152011-07-01 02:25:15 -07001062 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williamsab2e8f72011-04-27 16:32:45 -07001063
Dan Williamsd9dcb4b2011-06-30 17:38:32 -07001064 isci_remote_device_ready(ihost, idev);
Dan Williamsab2e8f72011-04-27 16:32:45 -07001065}
1066
Dan Williams89a73012011-06-30 19:14:33 -07001067static void sci_smp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm)
Dan Williamsab2e8f72011-04-27 16:32:45 -07001068{
Dan Williams78a6f062011-06-30 16:31:37 -07001069 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williams34a99152011-07-01 02:25:15 -07001070 struct isci_host *ihost = idev->owning_port->owning_controller;
Dan Williamsab2e8f72011-04-27 16:32:45 -07001071
Dan Williams78a6f062011-06-30 16:31:37 -07001072 BUG_ON(idev->working_request == NULL);
Dan Williamsab2e8f72011-04-27 16:32:45 -07001073
Dan Williamsd9dcb4b2011-06-30 17:38:32 -07001074 isci_remote_device_not_ready(ihost, idev,
Dan Williamsab2e8f72011-04-27 16:32:45 -07001075 SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED);
1076}
1077
Dan Williams89a73012011-06-30 19:14:33 -07001078static void sci_smp_remote_device_ready_cmd_substate_exit(struct sci_base_state_machine *sm)
Dan Williamsab2e8f72011-04-27 16:32:45 -07001079{
Dan Williams78a6f062011-06-30 16:31:37 -07001080 struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm);
Dan Williamsab2e8f72011-04-27 16:32:45 -07001081
Dan Williams78a6f062011-06-30 16:31:37 -07001082 idev->working_request = NULL;
Dan Williamsab2e8f72011-04-27 16:32:45 -07001083}
Dan Williams88f3b622011-04-22 19:18:03 -07001084
Dan Williams89a73012011-06-30 19:14:33 -07001085static const struct sci_base_state sci_remote_device_state_table[] = {
Edmund Nadolskie3013702011-06-02 00:10:43 +00001086 [SCI_DEV_INITIAL] = {
Dan Williams89a73012011-06-30 19:14:33 -07001087 .enter_state = sci_remote_device_initial_state_enter,
Dan Williams88f3b622011-04-22 19:18:03 -07001088 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001089 [SCI_DEV_STOPPED] = {
Dan Williams89a73012011-06-30 19:14:33 -07001090 .enter_state = sci_remote_device_stopped_state_enter,
Dan Williams88f3b622011-04-22 19:18:03 -07001091 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001092 [SCI_DEV_STARTING] = {
Dan Williams89a73012011-06-30 19:14:33 -07001093 .enter_state = sci_remote_device_starting_state_enter,
Dan Williams88f3b622011-04-22 19:18:03 -07001094 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001095 [SCI_DEV_READY] = {
Dan Williams89a73012011-06-30 19:14:33 -07001096 .enter_state = sci_remote_device_ready_state_enter,
1097 .exit_state = sci_remote_device_ready_state_exit
Dan Williams88f3b622011-04-22 19:18:03 -07001098 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001099 [SCI_STP_DEV_IDLE] = {
Dan Williams89a73012011-06-30 19:14:33 -07001100 .enter_state = sci_stp_remote_device_ready_idle_substate_enter,
Dan Williamsab2e8f72011-04-27 16:32:45 -07001101 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001102 [SCI_STP_DEV_CMD] = {
Dan Williams89a73012011-06-30 19:14:33 -07001103 .enter_state = sci_stp_remote_device_ready_cmd_substate_enter,
Dan Williamsab2e8f72011-04-27 16:32:45 -07001104 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001105 [SCI_STP_DEV_NCQ] = { },
1106 [SCI_STP_DEV_NCQ_ERROR] = {
Dan Williams89a73012011-06-30 19:14:33 -07001107 .enter_state = sci_stp_remote_device_ready_ncq_error_substate_enter,
Dan Williamsab2e8f72011-04-27 16:32:45 -07001108 },
Jeff Skirvinac78ed02012-03-08 22:41:50 -08001109 [SCI_STP_DEV_ATAPI_ERROR] = {
1110 .enter_state = sci_stp_remote_device_atapi_error_substate_enter,
1111 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001112 [SCI_STP_DEV_AWAIT_RESET] = { },
1113 [SCI_SMP_DEV_IDLE] = {
Dan Williams89a73012011-06-30 19:14:33 -07001114 .enter_state = sci_smp_remote_device_ready_idle_substate_enter,
Dan Williamsab2e8f72011-04-27 16:32:45 -07001115 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001116 [SCI_SMP_DEV_CMD] = {
Dan Williams89a73012011-06-30 19:14:33 -07001117 .enter_state = sci_smp_remote_device_ready_cmd_substate_enter,
1118 .exit_state = sci_smp_remote_device_ready_cmd_substate_exit,
Dan Williamsab2e8f72011-04-27 16:32:45 -07001119 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001120 [SCI_DEV_STOPPING] = { },
1121 [SCI_DEV_FAILED] = { },
1122 [SCI_DEV_RESETTING] = {
Dan Williams89a73012011-06-30 19:14:33 -07001123 .enter_state = sci_remote_device_resetting_state_enter,
1124 .exit_state = sci_remote_device_resetting_state_exit
Dan Williams88f3b622011-04-22 19:18:03 -07001125 },
Edmund Nadolskie3013702011-06-02 00:10:43 +00001126 [SCI_DEV_FINAL] = { },
Dan Williams88f3b622011-04-22 19:18:03 -07001127};
1128
1129/**
Dan Williams89a73012011-06-30 19:14:33 -07001130 * sci_remote_device_construct() - common construction
Dan Williams88f3b622011-04-22 19:18:03 -07001131 * @sci_port: SAS/SATA port through which this device is accessed.
1132 * @sci_dev: remote device to construct
1133 *
Dan Williamsb87ee302011-04-25 11:48:29 -07001134 * This routine just performs benign initialization and does not
1135 * allocate the remote_node_context which is left to
Dan Williams89a73012011-06-30 19:14:33 -07001136 * sci_remote_device_[de]a_construct(). sci_remote_device_destruct()
Dan Williamsb87ee302011-04-25 11:48:29 -07001137 * frees the remote_node_context(s) for the device.
Dan Williams88f3b622011-04-22 19:18:03 -07001138 */
Dan Williams89a73012011-06-30 19:14:33 -07001139static void sci_remote_device_construct(struct isci_port *iport,
Dan Williams78a6f062011-06-30 16:31:37 -07001140 struct isci_remote_device *idev)
Dan Williams88f3b622011-04-22 19:18:03 -07001141{
Dan Williams78a6f062011-06-30 16:31:37 -07001142 idev->owning_port = iport;
1143 idev->started_request_count = 0;
Dan Williams88f3b622011-04-22 19:18:03 -07001144
Dan Williams89a73012011-06-30 19:14:33 -07001145 sci_init_sm(&idev->sm, sci_remote_device_state_table, SCI_DEV_INITIAL);
Dan Williams88f3b622011-04-22 19:18:03 -07001146
Dan Williams89a73012011-06-30 19:14:33 -07001147 sci_remote_node_context_construct(&idev->rnc,
Dan Williams88f3b622011-04-22 19:18:03 -07001148 SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX);
Dan Williams88f3b622011-04-22 19:18:03 -07001149}
1150
1151/**
Dan Williams89a73012011-06-30 19:14:33 -07001152 * sci_remote_device_da_construct() - construct direct attached device.
Dan Williams88f3b622011-04-22 19:18:03 -07001153 *
Dan Williamsb87ee302011-04-25 11:48:29 -07001154 * The information (e.g. IAF, Signature FIS, etc.) necessary to build
1155 * the device is known to the SCI Core since it is contained in the
Dan Williams89a73012011-06-30 19:14:33 -07001156 * sci_phy object. Remote node context(s) is/are a global resource
1157 * allocated by this routine, freed by sci_remote_device_destruct().
Dan Williamsb87ee302011-04-25 11:48:29 -07001158 *
1159 * Returns:
1160 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1161 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1162 * sata-only controller instance.
1163 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
Dan Williams88f3b622011-04-22 19:18:03 -07001164 */
Dan Williams89a73012011-06-30 19:14:33 -07001165static enum sci_status sci_remote_device_da_construct(struct isci_port *iport,
Dan Williams78a6f062011-06-30 16:31:37 -07001166 struct isci_remote_device *idev)
Dan Williams88f3b622011-04-22 19:18:03 -07001167{
1168 enum sci_status status;
Bartek Nowakowski7e629842012-01-04 01:33:20 -08001169 struct sci_port_properties properties;
Dan Williams88f3b622011-04-22 19:18:03 -07001170
Dan Williams89a73012011-06-30 19:14:33 -07001171 sci_remote_device_construct(iport, idev);
Dan Williamsb87ee302011-04-25 11:48:29 -07001172
Bartek Nowakowski7e629842012-01-04 01:33:20 -08001173 sci_port_get_properties(iport, &properties);
1174 /* Get accurate port width from port's phy mask for a DA device. */
1175 idev->device_port_width = hweight32(properties.phy_mask);
1176
Dan Williams89a73012011-06-30 19:14:33 -07001177 status = sci_controller_allocate_remote_node_context(iport->owning_controller,
Dan Williams11cc51832012-02-01 00:23:10 -08001178 idev,
1179 &idev->rnc.remote_node_index);
Dan Williams88f3b622011-04-22 19:18:03 -07001180
Dan Williamsa1a113b2011-04-21 18:44:45 -07001181 if (status != SCI_SUCCESS)
1182 return status;
Dan Williams88f3b622011-04-22 19:18:03 -07001183
Dan Williams89a73012011-06-30 19:14:33 -07001184 idev->connection_rate = sci_port_get_max_allowed_speed(iport);
Dan Williams88f3b622011-04-22 19:18:03 -07001185
Dan Williamsa1a113b2011-04-21 18:44:45 -07001186 return SCI_SUCCESS;
Dan Williams88f3b622011-04-22 19:18:03 -07001187}
1188
Dan Williams88f3b622011-04-22 19:18:03 -07001189/**
Dan Williams89a73012011-06-30 19:14:33 -07001190 * sci_remote_device_ea_construct() - construct expander attached device
Dan Williams88f3b622011-04-22 19:18:03 -07001191 *
Dan Williamsb87ee302011-04-25 11:48:29 -07001192 * Remote node context(s) is/are a global resource allocated by this
Dan Williams89a73012011-06-30 19:14:33 -07001193 * routine, freed by sci_remote_device_destruct().
Dan Williamsb87ee302011-04-25 11:48:29 -07001194 *
1195 * Returns:
1196 * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed.
1197 * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to
1198 * sata-only controller instance.
1199 * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted.
Dan Williams88f3b622011-04-22 19:18:03 -07001200 */
Dan Williams89a73012011-06-30 19:14:33 -07001201static enum sci_status sci_remote_device_ea_construct(struct isci_port *iport,
Dan Williams78a6f062011-06-30 16:31:37 -07001202 struct isci_remote_device *idev)
Dan Williams88f3b622011-04-22 19:18:03 -07001203{
Dan Williams78a6f062011-06-30 16:31:37 -07001204 struct domain_device *dev = idev->domain_dev;
Dan Williams88f3b622011-04-22 19:18:03 -07001205 enum sci_status status;
Dan Williams88f3b622011-04-22 19:18:03 -07001206
Dan Williams89a73012011-06-30 19:14:33 -07001207 sci_remote_device_construct(iport, idev);
Dan Williams88f3b622011-04-22 19:18:03 -07001208
Dan Williams89a73012011-06-30 19:14:33 -07001209 status = sci_controller_allocate_remote_node_context(iport->owning_controller,
Dan Williams78a6f062011-06-30 16:31:37 -07001210 idev,
1211 &idev->rnc.remote_node_index);
Dan Williamsa1a113b2011-04-21 18:44:45 -07001212 if (status != SCI_SUCCESS)
1213 return status;
Dan Williams88f3b622011-04-22 19:18:03 -07001214
Dan Williams11cc51832012-02-01 00:23:10 -08001215 /* For SAS-2 the physical link rate is actually a logical link
Dan Williamsa1a113b2011-04-21 18:44:45 -07001216 * rate that incorporates multiplexing. The SCU doesn't
1217 * incorporate multiplexing and for the purposes of the
1218 * connection the logical link rate is that same as the
1219 * physical. Furthermore, the SAS-2 and SAS-1.1 fields overlay
Dan Williams11cc51832012-02-01 00:23:10 -08001220 * one another, so this code works for both situations.
1221 */
Dan Williams89a73012011-06-30 19:14:33 -07001222 idev->connection_rate = min_t(u16, sci_port_get_max_allowed_speed(iport),
Dan Williams00d680e2011-04-25 14:29:29 -07001223 dev->linkrate);
Dan Williams88f3b622011-04-22 19:18:03 -07001224
Dan Williamsa1a113b2011-04-21 18:44:45 -07001225 /* / @todo Should I assign the port width by reading all of the phys on the port? */
Dan Williams78a6f062011-06-30 16:31:37 -07001226 idev->device_port_width = 1;
Dan Williams88f3b622011-04-22 19:18:03 -07001227
Dan Williamsab2e8f72011-04-27 16:32:45 -07001228 return SCI_SUCCESS;
Dan Williams88f3b622011-04-22 19:18:03 -07001229}
1230
Jeff Skirvin5b6bf222012-03-08 22:41:51 -08001231enum sci_status sci_remote_device_resume(
1232 struct isci_remote_device *idev,
1233 scics_sds_remote_node_context_callback cb_fn,
1234 void *cb_p)
1235{
1236 enum sci_status status;
1237
1238 status = sci_remote_node_context_resume(&idev->rnc, cb_fn, cb_p);
1239 if (status != SCI_SUCCESS)
1240 dev_dbg(scirdev_to_dev(idev), "%s: failed to resume: %d\n",
1241 __func__, status);
1242 return status;
1243}
1244
1245enum sci_status isci_remote_device_resume(
1246 struct isci_host *ihost,
1247 struct isci_remote_device *idev,
1248 scics_sds_remote_node_context_callback cb_fn,
1249 void *cb_p)
1250{
1251 unsigned long flags;
1252 enum sci_status status;
1253
1254 spin_lock_irqsave(&ihost->scic_lock, flags);
1255 status = sci_remote_device_resume(idev, cb_fn, cb_p);
1256 spin_unlock_irqrestore(&ihost->scic_lock, flags);
1257
1258 return status;
1259}
Dan Williams88f3b622011-04-22 19:18:03 -07001260/**
Dan Williams89a73012011-06-30 19:14:33 -07001261 * sci_remote_device_start() - This method will start the supplied remote
Dan Williams88f3b622011-04-22 19:18:03 -07001262 * device. This method enables normal IO requests to flow through to the
1263 * remote device.
1264 * @remote_device: This parameter specifies the device to be started.
1265 * @timeout: This parameter specifies the number of milliseconds in which the
1266 * start operation should complete.
1267 *
1268 * An indication of whether the device was successfully started. SCI_SUCCESS
1269 * This value is returned if the device was successfully started.
1270 * SCI_FAILURE_INVALID_PHY This value is returned if the user attempts to start
1271 * the device when there have been no phys added to it.
1272 */
Dan Williams89a73012011-06-30 19:14:33 -07001273static enum sci_status sci_remote_device_start(struct isci_remote_device *idev,
Jeff Skirvin726980d2012-03-08 22:41:50 -08001274 u32 timeout)
Dan Williams88f3b622011-04-22 19:18:03 -07001275{
Dan Williams78a6f062011-06-30 16:31:37 -07001276 struct sci_base_state_machine *sm = &idev->sm;
Dan Williams89a73012011-06-30 19:14:33 -07001277 enum sci_remote_device_states state = sm->current_state_id;
Dan Williamseb229672011-05-01 14:05:57 -07001278 enum sci_status status;
1279
Edmund Nadolskie3013702011-06-02 00:10:43 +00001280 if (state != SCI_DEV_STOPPED) {
Dan Williamsd7a0ccd2012-02-10 01:18:44 -08001281 dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n",
1282 __func__, dev_state_name(state));
Dan Williamseb229672011-05-01 14:05:57 -07001283 return SCI_FAILURE_INVALID_STATE;
1284 }
1285
Jeff Skirvin5b6bf222012-03-08 22:41:51 -08001286 status = sci_remote_device_resume(idev, remote_device_resume_done,
1287 idev);
Dan Williamseb229672011-05-01 14:05:57 -07001288 if (status != SCI_SUCCESS)
1289 return status;
1290
Edmund Nadolskie3013702011-06-02 00:10:43 +00001291 sci_change_state(sm, SCI_DEV_STARTING);
Dan Williamseb229672011-05-01 14:05:57 -07001292
1293 return SCI_SUCCESS;
Dan Williams88f3b622011-04-22 19:18:03 -07001294}
Dan Williams6f231dd2011-07-02 22:56:22 -07001295
Dan Williams00d680e2011-04-25 14:29:29 -07001296static enum sci_status isci_remote_device_construct(struct isci_port *iport,
1297 struct isci_remote_device *idev)
Dan Williams6f231dd2011-07-02 22:56:22 -07001298{
Dan Williams00d680e2011-04-25 14:29:29 -07001299 struct isci_host *ihost = iport->isci_host;
1300 struct domain_device *dev = idev->domain_dev;
1301 enum sci_status status;
Dan Williams6f231dd2011-07-02 22:56:22 -07001302
Dan Williams00d680e2011-04-25 14:29:29 -07001303 if (dev->parent && dev_is_expander(dev->parent))
Dan Williams89a73012011-06-30 19:14:33 -07001304 status = sci_remote_device_ea_construct(iport, idev);
Dan Williams00d680e2011-04-25 14:29:29 -07001305 else
Dan Williams89a73012011-06-30 19:14:33 -07001306 status = sci_remote_device_da_construct(iport, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001307
1308 if (status != SCI_SUCCESS) {
Dan Williams00d680e2011-04-25 14:29:29 -07001309 dev_dbg(&ihost->pdev->dev, "%s: construct failed: %d\n",
1310 __func__, status);
Dan Williams6f231dd2011-07-02 22:56:22 -07001311
1312 return status;
1313 }
1314
Dan Williams6f231dd2011-07-02 22:56:22 -07001315 /* start the device. */
Dan Williams89a73012011-06-30 19:14:33 -07001316 status = sci_remote_device_start(idev, ISCI_REMOTE_DEVICE_START_TIMEOUT);
Dan Williams6f231dd2011-07-02 22:56:22 -07001317
Dan Williams00d680e2011-04-25 14:29:29 -07001318 if (status != SCI_SUCCESS)
1319 dev_warn(&ihost->pdev->dev, "remote device start failed: %d\n",
1320 status);
Dan Williams6f231dd2011-07-02 22:56:22 -07001321
1322 return status;
1323}
1324
Dan Williams4393aa42011-03-31 13:10:44 -07001325void isci_remote_device_nuke_requests(struct isci_host *ihost, struct isci_remote_device *idev)
Dan Williams6f231dd2011-07-02 22:56:22 -07001326{
1327 DECLARE_COMPLETION_ONSTACK(aborted_task_completion);
Dan Williams6f231dd2011-07-02 22:56:22 -07001328
Dan Williams4393aa42011-03-31 13:10:44 -07001329 dev_dbg(&ihost->pdev->dev,
1330 "%s: idev = %p\n", __func__, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001331
1332 /* Cleanup all requests pending for this device. */
Dan Williams980d3ae2011-06-20 15:11:22 -07001333 isci_terminate_pending_requests(ihost, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001334
Dan Williams4393aa42011-03-31 13:10:44 -07001335 dev_dbg(&ihost->pdev->dev,
1336 "%s: idev = %p, done\n", __func__, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001337}
1338
Dan Williams6f231dd2011-07-02 22:56:22 -07001339/**
1340 * This function builds the isci_remote_device when a libsas dev_found message
1341 * is received.
1342 * @isci_host: This parameter specifies the isci host object.
1343 * @port: This parameter specifies the isci_port conected to this device.
1344 *
1345 * pointer to new isci_remote_device.
1346 */
1347static struct isci_remote_device *
Dan Williamsd9c37392011-03-03 17:59:32 -08001348isci_remote_device_alloc(struct isci_host *ihost, struct isci_port *iport)
Dan Williams6f231dd2011-07-02 22:56:22 -07001349{
Dan Williamsd9c37392011-03-03 17:59:32 -08001350 struct isci_remote_device *idev;
1351 int i;
Dan Williams6f231dd2011-07-02 22:56:22 -07001352
Dan Williamsd9c37392011-03-03 17:59:32 -08001353 for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
Dan Williams57f20f42011-04-21 18:14:45 -07001354 idev = &ihost->devices[i];
Dan Williamsd9c37392011-03-03 17:59:32 -08001355 if (!test_and_set_bit(IDEV_ALLOCATED, &idev->flags))
1356 break;
1357 }
Dan Williams6f231dd2011-07-02 22:56:22 -07001358
Dan Williamsd9c37392011-03-03 17:59:32 -08001359 if (i >= SCI_MAX_REMOTE_DEVICES) {
1360 dev_warn(&ihost->pdev->dev, "%s: failed\n", __func__);
Dan Williams6f231dd2011-07-02 22:56:22 -07001361 return NULL;
1362 }
1363
Bartosz Barcinski6cb4d6b2011-04-12 17:28:43 -07001364 if (WARN_ONCE(!list_empty(&idev->reqs_in_process), "found requests in process\n"))
1365 return NULL;
1366
1367 if (WARN_ONCE(!list_empty(&idev->node), "found non-idle remote device\n"))
1368 return NULL;
1369
Dan Williamsd9c37392011-03-03 17:59:32 -08001370 return idev;
Dan Williams6f231dd2011-07-02 22:56:22 -07001371}
Dan Williams6f231dd2011-07-02 22:56:22 -07001372
Dan Williams209fae12011-06-13 17:39:44 -07001373void isci_remote_device_release(struct kref *kref)
1374{
1375 struct isci_remote_device *idev = container_of(kref, typeof(*idev), kref);
1376 struct isci_host *ihost = idev->isci_port->isci_host;
1377
1378 idev->domain_dev = NULL;
1379 idev->isci_port = NULL;
1380 clear_bit(IDEV_START_PENDING, &idev->flags);
1381 clear_bit(IDEV_STOP_PENDING, &idev->flags);
Dan Williamsf2088262011-06-16 11:26:12 -07001382 clear_bit(IDEV_IO_READY, &idev->flags);
Dan Williams209fae12011-06-13 17:39:44 -07001383 clear_bit(IDEV_GONE, &idev->flags);
Dan Williams209fae12011-06-13 17:39:44 -07001384 smp_mb__before_clear_bit();
1385 clear_bit(IDEV_ALLOCATED, &idev->flags);
1386 wake_up(&ihost->eventq);
1387}
1388
Dan Williams6f231dd2011-07-02 22:56:22 -07001389/**
Dan Williams6f231dd2011-07-02 22:56:22 -07001390 * isci_remote_device_stop() - This function is called internally to stop the
1391 * remote device.
1392 * @isci_host: This parameter specifies the isci host object.
1393 * @isci_device: This parameter specifies the remote device.
1394 *
Dan Williamsd9dcb4b2011-06-30 17:38:32 -07001395 * The status of the ihost request to stop.
Dan Williams6f231dd2011-07-02 22:56:22 -07001396 */
Dan Williams6ad31fe2011-03-04 12:10:29 -08001397enum sci_status isci_remote_device_stop(struct isci_host *ihost, struct isci_remote_device *idev)
Dan Williams6f231dd2011-07-02 22:56:22 -07001398{
1399 enum sci_status status;
1400 unsigned long flags;
Dan Williams6f231dd2011-07-02 22:56:22 -07001401
Dan Williams6ad31fe2011-03-04 12:10:29 -08001402 dev_dbg(&ihost->pdev->dev,
1403 "%s: isci_device = %p\n", __func__, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001404
Dan Williams209fae12011-06-13 17:39:44 -07001405 spin_lock_irqsave(&ihost->scic_lock, flags);
1406 idev->domain_dev->lldd_dev = NULL; /* disable new lookups */
1407 set_bit(IDEV_GONE, &idev->flags);
Jeff Skirvin6e2802a2011-03-08 20:32:16 -07001408
Dan Williams6ad31fe2011-03-04 12:10:29 -08001409 set_bit(IDEV_STOP_PENDING, &idev->flags);
Dan Williams89a73012011-06-30 19:14:33 -07001410 status = sci_remote_device_stop(idev, 50);
Dan Williams6ad31fe2011-03-04 12:10:29 -08001411 spin_unlock_irqrestore(&ihost->scic_lock, flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001412
1413 /* Wait for the stop complete callback. */
Dan Williams209fae12011-06-13 17:39:44 -07001414 if (WARN_ONCE(status != SCI_SUCCESS, "failed to stop device\n"))
1415 /* nothing to wait for */;
1416 else
Dan Williams6ad31fe2011-03-04 12:10:29 -08001417 wait_for_device_stop(ihost, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001418
Jeff Skirvin83884012012-03-08 22:41:52 -08001419 dev_dbg(&ihost->pdev->dev,
1420 "%s: isci_device = %p, waiting done.\n", __func__, idev);
1421
Dan Williams6f231dd2011-07-02 22:56:22 -07001422 return status;
1423}
1424
1425/**
1426 * isci_remote_device_gone() - This function is called by libsas when a domain
1427 * device is removed.
1428 * @domain_device: This parameter specifies the libsas domain device.
1429 *
1430 */
Dan Williams6ad31fe2011-03-04 12:10:29 -08001431void isci_remote_device_gone(struct domain_device *dev)
Dan Williams6f231dd2011-07-02 22:56:22 -07001432{
Dan Williams4393aa42011-03-31 13:10:44 -07001433 struct isci_host *ihost = dev_to_ihost(dev);
Dan Williams6ad31fe2011-03-04 12:10:29 -08001434 struct isci_remote_device *idev = dev->lldd_dev;
Dan Williams6f231dd2011-07-02 22:56:22 -07001435
Dan Williams6ad31fe2011-03-04 12:10:29 -08001436 dev_dbg(&ihost->pdev->dev,
Dan Williams6f231dd2011-07-02 22:56:22 -07001437 "%s: domain_device = %p, isci_device = %p, isci_port = %p\n",
Dan Williams6ad31fe2011-03-04 12:10:29 -08001438 __func__, dev, idev, idev->isci_port);
Dan Williams6f231dd2011-07-02 22:56:22 -07001439
Dan Williams6ad31fe2011-03-04 12:10:29 -08001440 isci_remote_device_stop(ihost, idev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001441}
1442
1443
1444/**
1445 * isci_remote_device_found() - This function is called by libsas when a remote
1446 * device is discovered. A remote device object is created and started. the
1447 * function then sleeps until the sci core device started message is
1448 * received.
1449 * @domain_device: This parameter specifies the libsas domain device.
1450 *
1451 * status, zero indicates success.
1452 */
Dan Williamsc132f692012-01-03 23:26:08 -08001453int isci_remote_device_found(struct domain_device *dev)
Dan Williams6f231dd2011-07-02 22:56:22 -07001454{
Dan Williamsc132f692012-01-03 23:26:08 -08001455 struct isci_host *isci_host = dev_to_ihost(dev);
1456 struct isci_port *isci_port = dev->port->lldd_port;
Dan Williams6f231dd2011-07-02 22:56:22 -07001457 struct isci_remote_device *isci_device;
1458 enum sci_status status;
Dan Williams6f231dd2011-07-02 22:56:22 -07001459
Dan Williams6f231dd2011-07-02 22:56:22 -07001460 dev_dbg(&isci_host->pdev->dev,
Dan Williamsc132f692012-01-03 23:26:08 -08001461 "%s: domain_device = %p\n", __func__, dev);
Dan Williams6f231dd2011-07-02 22:56:22 -07001462
Dan Williamsc132f692012-01-03 23:26:08 -08001463 if (!isci_port)
1464 return -ENODEV;
Dan Williams6f231dd2011-07-02 22:56:22 -07001465
Dan Williams6f231dd2011-07-02 22:56:22 -07001466 isci_device = isci_remote_device_alloc(isci_host, isci_port);
Dan Williamsd9c37392011-03-03 17:59:32 -08001467 if (!isci_device)
1468 return -ENODEV;
Dan Williams6f231dd2011-07-02 22:56:22 -07001469
Dan Williams209fae12011-06-13 17:39:44 -07001470 kref_init(&isci_device->kref);
Dan Williams6f231dd2011-07-02 22:56:22 -07001471 INIT_LIST_HEAD(&isci_device->node);
Dan Williams209fae12011-06-13 17:39:44 -07001472
1473 spin_lock_irq(&isci_host->scic_lock);
Dan Williamsc132f692012-01-03 23:26:08 -08001474 isci_device->domain_dev = dev;
Dan Williams6f231dd2011-07-02 22:56:22 -07001475 isci_device->isci_port = isci_port;
Dan Williams6f231dd2011-07-02 22:56:22 -07001476 list_add_tail(&isci_device->node, &isci_port->remote_dev_list);
1477
Dan Williams6ad31fe2011-03-04 12:10:29 -08001478 set_bit(IDEV_START_PENDING, &isci_device->flags);
Dan Williams6f231dd2011-07-02 22:56:22 -07001479 status = isci_remote_device_construct(isci_port, isci_device);
Dan Williams6f231dd2011-07-02 22:56:22 -07001480
Dan Williams6f231dd2011-07-02 22:56:22 -07001481 dev_dbg(&isci_host->pdev->dev,
1482 "%s: isci_device = %p\n",
1483 __func__, isci_device);
1484
Dan Williams209fae12011-06-13 17:39:44 -07001485 if (status == SCI_SUCCESS) {
1486 /* device came up, advertise it to the world */
Dan Williamsc132f692012-01-03 23:26:08 -08001487 dev->lldd_dev = isci_device;
Dan Williams209fae12011-06-13 17:39:44 -07001488 } else
1489 isci_put_device(isci_device);
1490 spin_unlock_irq(&isci_host->scic_lock);
Dan Williams6f231dd2011-07-02 22:56:22 -07001491
Dan Williams6ad31fe2011-03-04 12:10:29 -08001492 /* wait for the device ready callback. */
1493 wait_for_device_start(isci_host, isci_device);
1494
Dan Williams209fae12011-06-13 17:39:44 -07001495 return status == SCI_SUCCESS ? 0 : -ENODEV;
Dan Williams6f231dd2011-07-02 22:56:22 -07001496}
Jeff Skirvin726980d2012-03-08 22:41:50 -08001497
1498enum sci_status isci_remote_device_reset(
Jeff Skirvin5b6bf222012-03-08 22:41:51 -08001499 struct isci_host *ihost,
Jeff Skirvin726980d2012-03-08 22:41:50 -08001500 struct isci_remote_device *idev)
1501{
Jeff Skirvin726980d2012-03-08 22:41:50 -08001502 unsigned long flags;
1503 enum sci_status status;
1504
Jeff Skirvin5b6bf222012-03-08 22:41:51 -08001505 /* Put the device into a reset state so the suspension will not
1506 * automatically resume.
1507 */
Jeff Skirvin726980d2012-03-08 22:41:50 -08001508 spin_lock_irqsave(&ihost->scic_lock, flags);
1509 status = sci_remote_device_reset(idev);
1510 spin_unlock_irqrestore(&ihost->scic_lock, flags);
1511 if (status != SCI_SUCCESS) {
1512 dev_dbg(&ihost->pdev->dev,
1513 "%s: sci_remote_device_reset(%p) returned %d!\n",
1514 __func__, idev, status);
Jeff Skirvin5b6bf222012-03-08 22:41:51 -08001515 return status;
1516 }
1517 /* Wait for the device suspend. */
1518 status = isci_remote_device_suspend(ihost, idev);
1519 if (status != SCI_SUCCESS) {
1520 dev_dbg(&ihost->pdev->dev,
1521 "%s: isci_remote_device_suspend(%p) returned %d!\n",
1522 __func__, idev, status);
Jeff Skirvin726980d2012-03-08 22:41:50 -08001523 }
1524 return status;
1525}
1526
1527int isci_remote_device_is_safe_to_abort(
1528 struct isci_remote_device *idev)
1529{
1530 return sci_remote_node_context_is_safe_to_abort(&idev->rnc);
1531}
1532
1533enum sci_status sci_remote_device_abort_requests_pending_abort(
1534 struct isci_remote_device *idev)
1535{
1536 return sci_remote_device_terminate_requests_checkabort(idev, 1);
1537}
Jeff Skirvin5b6bf222012-03-08 22:41:51 -08001538
1539enum sci_status isci_remote_device_reset_complete(
1540 struct isci_host *ihost,
1541 struct isci_remote_device *idev)
1542{
1543 unsigned long flags;
1544 enum sci_status status;
1545
1546 spin_lock_irqsave(&ihost->scic_lock, flags);
1547 status = sci_remote_device_reset_complete(idev);
1548 sci_remote_device_resume(idev, NULL, NULL);
1549 spin_unlock_irqrestore(&ihost->scic_lock, flags);
1550
1551 return status;
1552}
1553