Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is provided under a dual BSD/GPLv2 license. When using or |
| 3 | * redistributing this file, you may do so under either license. |
| 4 | * |
| 5 | * GPL LICENSE SUMMARY |
| 6 | * |
| 7 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of version 2 of the GNU General Public License as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 21 | * The full GNU General Public License is included in this distribution |
| 22 | * in the file called LICENSE.GPL. |
| 23 | * |
| 24 | * BSD LICENSE |
| 25 | * |
| 26 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. |
| 27 | * All rights reserved. |
| 28 | * |
| 29 | * Redistribution and use in source and binary forms, with or without |
| 30 | * modification, are permitted provided that the following conditions |
| 31 | * are met: |
| 32 | * |
| 33 | * * Redistributions of source code must retain the above copyright |
| 34 | * notice, this list of conditions and the following disclaimer. |
| 35 | * * Redistributions in binary form must reproduce the above copyright |
| 36 | * notice, this list of conditions and the following disclaimer in |
| 37 | * the documentation and/or other materials provided with the |
| 38 | * distribution. |
| 39 | * * Neither the name of Intel Corporation nor the names of its |
| 40 | * contributors may be used to endorse or promote products derived |
| 41 | * from this software without specific prior written permission. |
| 42 | * |
| 43 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 44 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 45 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 46 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 47 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 48 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 49 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 50 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 51 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 52 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 53 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 54 | */ |
Dave Jiang | 2d9c224 | 2011-05-04 18:45:05 -0700 | [diff] [blame] | 55 | #include <scsi/sas.h> |
Bartek Nowakowski | 7e62984 | 2012-01-04 01:33:20 -0800 | [diff] [blame] | 56 | #include <linux/bitops.h> |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 57 | #include "isci.h" |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 58 | #include "port.h" |
| 59 | #include "remote_device.h" |
| 60 | #include "request.h" |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 61 | #include "remote_node_context.h" |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 62 | #include "scu_event_codes.h" |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 63 | #include "task.h" |
| 64 | |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 65 | #undef C |
| 66 | #define C(a) (#a) |
| 67 | const 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 Skirvin | c94fc1a | 2012-03-08 22:41:58 -0800 | [diff] [blame] | 75 | static enum sci_status sci_remote_device_suspend(struct isci_remote_device *idev, |
| 76 | enum sci_remote_node_suspension_reasons reason) |
Jeff Skirvin | 23ec2aa | 2012-03-08 22:41:52 -0800 | [diff] [blame] | 77 | { |
Jeff Skirvin | 447bfbc | 2012-03-08 22:41:59 -0800 | [diff] [blame] | 78 | return sci_remote_node_context_suspend(&idev->rnc, reason, |
| 79 | SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT); |
Jeff Skirvin | 23ec2aa | 2012-03-08 22:41:52 -0800 | [diff] [blame] | 80 | } |
| 81 | |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 82 | /** |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 83 | * isci_remote_device_ready() - This function is called by the ihost when the |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 84 | * remote device is ready. We mark the isci device as ready and signal the |
| 85 | * waiting proccess. |
| 86 | * @ihost: our valid isci_host |
| 87 | * @idev: remote device |
| 88 | * |
| 89 | */ |
| 90 | static void isci_remote_device_ready(struct isci_host *ihost, struct isci_remote_device *idev) |
| 91 | { |
| 92 | dev_dbg(&ihost->pdev->dev, |
| 93 | "%s: idev = %p\n", __func__, idev); |
| 94 | |
Jeff Skirvin | 9274f45 | 2011-06-23 17:09:02 -0700 | [diff] [blame] | 95 | clear_bit(IDEV_IO_NCQERROR, &idev->flags); |
Dan Williams | f208826 | 2011-06-16 11:26:12 -0700 | [diff] [blame] | 96 | set_bit(IDEV_IO_READY, &idev->flags); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 97 | if (test_and_clear_bit(IDEV_START_PENDING, &idev->flags)) |
| 98 | wake_up(&ihost->eventq); |
| 99 | } |
| 100 | |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 101 | static enum sci_status sci_remote_device_terminate_req( |
| 102 | struct isci_host *ihost, |
| 103 | struct isci_remote_device *idev, |
| 104 | int check_abort, |
| 105 | struct isci_request *ireq) |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 106 | { |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 107 | dev_dbg(&ihost->pdev->dev, |
| 108 | "%s: idev=%p; flags=%lx; req=%p; req target=%p\n", |
| 109 | __func__, idev, idev->flags, ireq, ireq->target_device); |
| 110 | |
| 111 | if (!test_bit(IREQ_ACTIVE, &ireq->flags) || |
| 112 | (ireq->target_device != idev) || |
| 113 | (check_abort && !test_bit(IREQ_PENDING_ABORT, &ireq->flags))) |
| 114 | return SCI_SUCCESS; |
| 115 | |
| 116 | set_bit(IREQ_ABORT_PATH_ACTIVE, &ireq->flags); |
| 117 | |
| 118 | return sci_controller_terminate_request(ihost, idev, ireq); |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 119 | } |
| 120 | |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 121 | static enum sci_status sci_remote_device_terminate_reqs_checkabort( |
| 122 | struct isci_remote_device *idev, |
| 123 | int chk) |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 124 | { |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 125 | struct isci_host *ihost = idev->owning_port->owning_controller; |
| 126 | enum sci_status status = SCI_SUCCESS; |
| 127 | u32 i; |
| 128 | |
| 129 | for (i = 0; i < SCI_MAX_IO_REQUESTS; i++) { |
| 130 | struct isci_request *ireq = ihost->reqs[i]; |
| 131 | enum sci_status s; |
| 132 | |
| 133 | s = sci_remote_device_terminate_req(ihost, idev, chk, ireq); |
| 134 | if (s != SCI_SUCCESS) |
| 135 | status = s; |
| 136 | } |
| 137 | return status; |
| 138 | } |
| 139 | |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 140 | static bool isci_compare_suspendcount( |
| 141 | struct isci_remote_device *idev, |
| 142 | u32 localcount) |
| 143 | { |
| 144 | smp_rmb(); |
| 145 | return localcount != idev->rnc.suspend_count; |
| 146 | } |
| 147 | |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 148 | enum sci_status isci_remote_device_terminate_requests( |
| 149 | struct isci_host *ihost, |
| 150 | struct isci_remote_device *idev, |
| 151 | struct isci_request *ireq) |
| 152 | { |
| 153 | enum sci_status status = SCI_SUCCESS; |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 154 | unsigned long flags; |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 155 | u32 rnc_suspend_count; |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 156 | |
| 157 | spin_lock_irqsave(&ihost->scic_lock, flags); |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 158 | |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 159 | if (isci_get_device(idev) == NULL) { |
| 160 | dev_dbg(&ihost->pdev->dev, "%s: failed isci_get_device(idev=%p)\n", |
| 161 | __func__, idev); |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 162 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
| 163 | status = SCI_FAILURE; |
| 164 | } else { |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 165 | /* If already suspended, don't wait for another suspension. */ |
| 166 | smp_rmb(); |
| 167 | rnc_suspend_count |
| 168 | = sci_remote_node_context_is_suspended(&idev->rnc) |
| 169 | ? 0 : idev->rnc.suspend_count; |
| 170 | |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 171 | dev_dbg(&ihost->pdev->dev, |
| 172 | "%s: idev=%p, ireq=%p; started_request_count=%d, " |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 173 | "rnc_suspend_count=%d, rnc.suspend_count=%d" |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 174 | "about to wait\n", |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 175 | __func__, idev, ireq, idev->started_request_count, |
| 176 | rnc_suspend_count, idev->rnc.suspend_count); |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 177 | if (ireq) { |
| 178 | /* Terminate a specific TC. */ |
| 179 | sci_remote_device_terminate_req(ihost, idev, 0, ireq); |
| 180 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 181 | wait_event(ihost->eventq, |
| 182 | (isci_compare_suspendcount(idev, |
| 183 | rnc_suspend_count) |
| 184 | && !test_bit(IREQ_ACTIVE, &ireq->flags))); |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 185 | } else { |
| 186 | /* Terminate all TCs. */ |
| 187 | sci_remote_device_terminate_requests(idev); |
| 188 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
| 189 | wait_event(ihost->eventq, |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 190 | (isci_compare_suspendcount(idev, |
| 191 | rnc_suspend_count) |
| 192 | && idev->started_request_count == 0)); |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 193 | } |
| 194 | dev_dbg(&ihost->pdev->dev, "%s: idev=%p, wait done\n", |
| 195 | __func__, idev); |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 196 | isci_put_device(idev); |
| 197 | } |
| 198 | return status; |
| 199 | } |
| 200 | |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 201 | /** |
| 202 | * isci_remote_device_not_ready() - This function is called by the ihost when |
| 203 | * the remote device is not ready. We mark the isci device as ready (not |
| 204 | * "ready_for_io") and signal the waiting proccess. |
| 205 | * @isci_host: This parameter specifies the isci host object. |
| 206 | * @isci_device: This parameter specifies the remote device |
| 207 | * |
| 208 | * sci_lock is held on entrance to this function. |
| 209 | */ |
| 210 | static void isci_remote_device_not_ready(struct isci_host *ihost, |
| 211 | struct isci_remote_device *idev, |
| 212 | u32 reason) |
| 213 | { |
| 214 | dev_dbg(&ihost->pdev->dev, |
Jeff Skirvin | 59e3539 | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 215 | "%s: isci_device = %p; reason = %d\n", __func__, idev, reason); |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 216 | |
| 217 | switch (reason) { |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 218 | case SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED: |
| 219 | set_bit(IDEV_IO_NCQERROR, &idev->flags); |
| 220 | |
| 221 | /* Suspend the remote device so the I/O can be terminated. */ |
Jeff Skirvin | c94fc1a | 2012-03-08 22:41:58 -0800 | [diff] [blame] | 222 | sci_remote_device_suspend(idev, SCI_SW_SUSPEND_NORMAL); |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 223 | |
| 224 | /* Kill all outstanding requests for the device. */ |
| 225 | sci_remote_device_terminate_requests(idev); |
| 226 | |
| 227 | /* Fall through into the default case... */ |
| 228 | default: |
| 229 | clear_bit(IDEV_IO_READY, &idev->flags); |
| 230 | break; |
| 231 | } |
| 232 | } |
| 233 | |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 234 | /* called once the remote node context is ready to be freed. |
| 235 | * The remote device can now report that its stop operation is complete. none |
| 236 | */ |
| 237 | static void rnc_destruct_done(void *_dev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 238 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 239 | struct isci_remote_device *idev = _dev; |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 240 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 241 | BUG_ON(idev->started_request_count != 0); |
| 242 | sci_change_state(&idev->sm, SCI_DEV_STOPPED); |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 243 | } |
| 244 | |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 245 | enum sci_status sci_remote_device_terminate_requests( |
| 246 | struct isci_remote_device *idev) |
| 247 | { |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 248 | return sci_remote_device_terminate_reqs_checkabort(idev, 0); |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 249 | } |
| 250 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 251 | enum sci_status sci_remote_device_stop(struct isci_remote_device *idev, |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 252 | u32 timeout) |
| 253 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 254 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 255 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 256 | |
| 257 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 258 | case SCI_DEV_INITIAL: |
| 259 | case SCI_DEV_FAILED: |
| 260 | case SCI_DEV_FINAL: |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 261 | default: |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 262 | dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n", |
| 263 | __func__, dev_state_name(state)); |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 264 | return SCI_FAILURE_INVALID_STATE; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 265 | case SCI_DEV_STOPPED: |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 266 | return SCI_SUCCESS; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 267 | case SCI_DEV_STARTING: |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 268 | /* device not started so there had better be no requests */ |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 269 | BUG_ON(idev->started_request_count != 0); |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 270 | sci_remote_node_context_destruct(&idev->rnc, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 271 | rnc_destruct_done, idev); |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 272 | /* Transition to the stopping state and wait for the |
| 273 | * remote node to complete being posted and invalidated. |
| 274 | */ |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 275 | sci_change_state(sm, SCI_DEV_STOPPING); |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 276 | return SCI_SUCCESS; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 277 | case SCI_DEV_READY: |
| 278 | case SCI_STP_DEV_IDLE: |
| 279 | case SCI_STP_DEV_CMD: |
| 280 | case SCI_STP_DEV_NCQ: |
| 281 | case SCI_STP_DEV_NCQ_ERROR: |
| 282 | case SCI_STP_DEV_AWAIT_RESET: |
| 283 | case SCI_SMP_DEV_IDLE: |
| 284 | case SCI_SMP_DEV_CMD: |
| 285 | sci_change_state(sm, SCI_DEV_STOPPING); |
Jeff Skirvin | 8388401 | 2012-03-08 22:41:52 -0800 | [diff] [blame] | 286 | if (idev->started_request_count == 0) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 287 | sci_remote_node_context_destruct(&idev->rnc, |
Jeff Skirvin | 8388401 | 2012-03-08 22:41:52 -0800 | [diff] [blame] | 288 | rnc_destruct_done, |
| 289 | idev); |
| 290 | else { |
Jeff Skirvin | c94fc1a | 2012-03-08 22:41:58 -0800 | [diff] [blame] | 291 | sci_remote_device_suspend( |
| 292 | idev, SCI_SW_SUSPEND_LINKHANG_DETECT); |
Jeff Skirvin | 8388401 | 2012-03-08 22:41:52 -0800 | [diff] [blame] | 293 | sci_remote_device_terminate_requests(idev); |
| 294 | } |
| 295 | return SCI_SUCCESS; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 296 | case SCI_DEV_STOPPING: |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 297 | /* All requests should have been terminated, but if there is an |
| 298 | * attempt to stop a device already in the stopping state, then |
| 299 | * try again to terminate. |
| 300 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 301 | return sci_remote_device_terminate_requests(idev); |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 302 | case SCI_DEV_RESETTING: |
| 303 | sci_change_state(sm, SCI_DEV_STOPPING); |
Dan Williams | ec57566 | 2011-05-01 14:19:25 -0700 | [diff] [blame] | 304 | return SCI_SUCCESS; |
| 305 | } |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 306 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 307 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 308 | enum sci_status sci_remote_device_reset(struct isci_remote_device *idev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 309 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 310 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 311 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | 4fd0d2e | 2011-05-01 14:48:54 -0700 | [diff] [blame] | 312 | |
| 313 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 314 | case SCI_DEV_INITIAL: |
| 315 | case SCI_DEV_STOPPED: |
| 316 | case SCI_DEV_STARTING: |
| 317 | case SCI_SMP_DEV_IDLE: |
| 318 | case SCI_SMP_DEV_CMD: |
| 319 | case SCI_DEV_STOPPING: |
| 320 | case SCI_DEV_FAILED: |
| 321 | case SCI_DEV_RESETTING: |
| 322 | case SCI_DEV_FINAL: |
Dan Williams | 4fd0d2e | 2011-05-01 14:48:54 -0700 | [diff] [blame] | 323 | default: |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 324 | dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n", |
| 325 | __func__, dev_state_name(state)); |
Dan Williams | 4fd0d2e | 2011-05-01 14:48:54 -0700 | [diff] [blame] | 326 | return SCI_FAILURE_INVALID_STATE; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 327 | case SCI_DEV_READY: |
| 328 | case SCI_STP_DEV_IDLE: |
| 329 | case SCI_STP_DEV_CMD: |
| 330 | case SCI_STP_DEV_NCQ: |
| 331 | case SCI_STP_DEV_NCQ_ERROR: |
| 332 | case SCI_STP_DEV_AWAIT_RESET: |
| 333 | sci_change_state(sm, SCI_DEV_RESETTING); |
Dan Williams | 4fd0d2e | 2011-05-01 14:48:54 -0700 | [diff] [blame] | 334 | return SCI_SUCCESS; |
| 335 | } |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 336 | } |
| 337 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 338 | enum sci_status sci_remote_device_reset_complete(struct isci_remote_device *idev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 339 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 340 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 341 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 342 | |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 343 | if (state != SCI_DEV_RESETTING) { |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 344 | dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n", |
| 345 | __func__, dev_state_name(state)); |
Dan Williams | 8151518 | 2011-05-01 14:53:00 -0700 | [diff] [blame] | 346 | return SCI_FAILURE_INVALID_STATE; |
| 347 | } |
| 348 | |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 349 | sci_change_state(sm, SCI_DEV_READY); |
Dan Williams | 8151518 | 2011-05-01 14:53:00 -0700 | [diff] [blame] | 350 | return SCI_SUCCESS; |
| 351 | } |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 352 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 353 | enum sci_status sci_remote_device_frame_handler(struct isci_remote_device *idev, |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 354 | u32 frame_index) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 355 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 356 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 357 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 358 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 359 | enum sci_status status; |
| 360 | |
| 361 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 362 | case SCI_DEV_INITIAL: |
| 363 | case SCI_DEV_STOPPED: |
| 364 | case SCI_DEV_STARTING: |
| 365 | case SCI_STP_DEV_IDLE: |
| 366 | case SCI_SMP_DEV_IDLE: |
| 367 | case SCI_DEV_FINAL: |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 368 | default: |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 369 | dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n", |
| 370 | __func__, dev_state_name(state)); |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 371 | /* Return the frame back to the controller */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 372 | sci_controller_release_frame(ihost, frame_index); |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 373 | return SCI_FAILURE_INVALID_STATE; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 374 | case SCI_DEV_READY: |
| 375 | case SCI_STP_DEV_NCQ_ERROR: |
| 376 | case SCI_STP_DEV_AWAIT_RESET: |
| 377 | case SCI_DEV_STOPPING: |
| 378 | case SCI_DEV_FAILED: |
| 379 | case SCI_DEV_RESETTING: { |
Dan Williams | 5076a1a | 2011-06-27 14:57:03 -0700 | [diff] [blame] | 380 | struct isci_request *ireq; |
Dave Jiang | 2d9c224 | 2011-05-04 18:45:05 -0700 | [diff] [blame] | 381 | struct ssp_frame_hdr hdr; |
| 382 | void *frame_header; |
| 383 | ssize_t word_cnt; |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 384 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 385 | status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 386 | frame_index, |
Dave Jiang | 2d9c224 | 2011-05-04 18:45:05 -0700 | [diff] [blame] | 387 | &frame_header); |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 388 | if (status != SCI_SUCCESS) |
| 389 | return status; |
| 390 | |
Dave Jiang | 2d9c224 | 2011-05-04 18:45:05 -0700 | [diff] [blame] | 391 | word_cnt = sizeof(hdr) / sizeof(u32); |
| 392 | sci_swab32_cpy(&hdr, frame_header, word_cnt); |
| 393 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 394 | ireq = sci_request_by_tag(ihost, be16_to_cpu(hdr.tag)); |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 395 | if (ireq && ireq->target_device == idev) { |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 396 | /* The IO request is now in charge of releasing the frame */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 397 | status = sci_io_request_frame_handler(ireq, frame_index); |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 398 | } else { |
| 399 | /* We could not map this tag to a valid IO |
| 400 | * request Just toss the frame and continue |
| 401 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 402 | sci_controller_release_frame(ihost, frame_index); |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 403 | } |
| 404 | break; |
| 405 | } |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 406 | case SCI_STP_DEV_NCQ: { |
Dave Jiang | e76d618 | 2011-05-04 15:02:03 -0700 | [diff] [blame] | 407 | struct dev_to_host_fis *hdr; |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 408 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 409 | status = sci_unsolicited_frame_control_get_header(&ihost->uf_control, |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 410 | frame_index, |
| 411 | (void **)&hdr); |
| 412 | if (status != SCI_SUCCESS) |
| 413 | return status; |
| 414 | |
Dave Jiang | e76d618 | 2011-05-04 15:02:03 -0700 | [diff] [blame] | 415 | if (hdr->fis_type == FIS_SETDEVBITS && |
| 416 | (hdr->status & ATA_ERR)) { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 417 | idev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED; |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 418 | |
| 419 | /* TODO Check sactive and complete associated IO if any. */ |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 420 | sci_change_state(sm, SCI_STP_DEV_NCQ_ERROR); |
Dave Jiang | e76d618 | 2011-05-04 15:02:03 -0700 | [diff] [blame] | 421 | } else if (hdr->fis_type == FIS_REGD2H && |
| 422 | (hdr->status & ATA_ERR)) { |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 423 | /* |
| 424 | * Some devices return D2H FIS when an NCQ error is detected. |
| 425 | * Treat this like an SDB error FIS ready reason. |
| 426 | */ |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 427 | idev->not_ready_reason = SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED; |
| 428 | sci_change_state(&idev->sm, SCI_STP_DEV_NCQ_ERROR); |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 429 | } else |
| 430 | status = SCI_FAILURE; |
| 431 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 432 | sci_controller_release_frame(ihost, frame_index); |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 433 | break; |
| 434 | } |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 435 | case SCI_STP_DEV_CMD: |
| 436 | case SCI_SMP_DEV_CMD: |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 437 | /* The device does not process any UF received from the hardware while |
| 438 | * in this state. All unsolicited frames are forwarded to the io request |
| 439 | * object. |
| 440 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 441 | status = sci_io_request_frame_handler(idev->working_request, frame_index); |
Dan Williams | 01bec77 | 2011-05-01 16:51:11 -0700 | [diff] [blame] | 442 | break; |
| 443 | } |
| 444 | |
| 445 | return status; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 446 | } |
| 447 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 448 | static bool is_remote_device_ready(struct isci_remote_device *idev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 449 | { |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 450 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 451 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 452 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 453 | |
| 454 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 455 | case SCI_DEV_READY: |
| 456 | case SCI_STP_DEV_IDLE: |
| 457 | case SCI_STP_DEV_CMD: |
| 458 | case SCI_STP_DEV_NCQ: |
| 459 | case SCI_STP_DEV_NCQ_ERROR: |
| 460 | case SCI_STP_DEV_AWAIT_RESET: |
| 461 | case SCI_SMP_DEV_IDLE: |
| 462 | case SCI_SMP_DEV_CMD: |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 463 | return true; |
| 464 | default: |
| 465 | return false; |
| 466 | } |
| 467 | } |
| 468 | |
Dan Williams | b50102d | 2011-09-30 18:52:19 -0700 | [diff] [blame] | 469 | /* |
| 470 | * called once the remote node context has transisitioned to a ready |
| 471 | * state (after suspending RX and/or TX due to early D2H fis) |
| 472 | */ |
| 473 | static void atapi_remote_device_resume_done(void *_dev) |
| 474 | { |
| 475 | struct isci_remote_device *idev = _dev; |
| 476 | struct isci_request *ireq = idev->working_request; |
| 477 | |
| 478 | sci_change_state(&ireq->sm, SCI_REQ_COMPLETED); |
| 479 | } |
| 480 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 481 | enum sci_status sci_remote_device_event_handler(struct isci_remote_device *idev, |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 482 | u32 event_code) |
| 483 | { |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 484 | enum sci_status status; |
| 485 | |
| 486 | switch (scu_get_event_type(event_code)) { |
| 487 | case SCU_EVENT_TYPE_RNC_OPS_MISC: |
| 488 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX: |
| 489 | case SCU_EVENT_TYPE_RNC_SUSPEND_TX_RX: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 490 | status = sci_remote_node_context_event_handler(&idev->rnc, event_code); |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 491 | break; |
| 492 | case SCU_EVENT_TYPE_PTX_SCHEDULE_EVENT: |
| 493 | if (scu_get_event_code(event_code) == SCU_EVENT_IT_NEXUS_TIMEOUT) { |
| 494 | status = SCI_SUCCESS; |
| 495 | |
| 496 | /* Suspend the associated RNC */ |
Jeff Skirvin | c94fc1a | 2012-03-08 22:41:58 -0800 | [diff] [blame] | 497 | sci_remote_device_suspend(idev, SCI_SW_SUSPEND_NORMAL); |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 498 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 499 | dev_dbg(scirdev_to_dev(idev), |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 500 | "%s: device: %p event code: %x: %s\n", |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 501 | __func__, idev, event_code, |
| 502 | is_remote_device_ready(idev) |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 503 | ? "I_T_Nexus_Timeout event" |
| 504 | : "I_T_Nexus_Timeout event in wrong state"); |
| 505 | |
| 506 | break; |
| 507 | } |
| 508 | /* Else, fall through and treat as unhandled... */ |
| 509 | default: |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 510 | dev_dbg(scirdev_to_dev(idev), |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 511 | "%s: device: %p event code: %x: %s\n", |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 512 | __func__, idev, event_code, |
| 513 | is_remote_device_ready(idev) |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 514 | ? "unexpected event" |
| 515 | : "unexpected event in wrong state"); |
| 516 | status = SCI_FAILURE_INVALID_STATE; |
| 517 | break; |
| 518 | } |
| 519 | |
| 520 | if (status != SCI_SUCCESS) |
| 521 | return status; |
| 522 | |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 523 | return status; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 524 | } |
| 525 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 526 | static void sci_remote_device_start_request(struct isci_remote_device *idev, |
Dan Williams | 5076a1a | 2011-06-27 14:57:03 -0700 | [diff] [blame] | 527 | struct isci_request *ireq, |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 528 | enum sci_status status) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 529 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 530 | struct isci_port *iport = idev->owning_port; |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 531 | |
| 532 | /* cleanup requests that failed after starting on the port */ |
| 533 | if (status != SCI_SUCCESS) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 534 | sci_port_complete_io(iport, idev, ireq); |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 535 | else { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 536 | kref_get(&idev->kref); |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 537 | idev->started_request_count++; |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 538 | } |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 539 | } |
| 540 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 541 | enum sci_status sci_remote_device_start_io(struct isci_host *ihost, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 542 | struct isci_remote_device *idev, |
Dan Williams | 5076a1a | 2011-06-27 14:57:03 -0700 | [diff] [blame] | 543 | struct isci_request *ireq) |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 544 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 545 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 546 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 547 | struct isci_port *iport = idev->owning_port; |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 548 | enum sci_status status; |
| 549 | |
| 550 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 551 | case SCI_DEV_INITIAL: |
| 552 | case SCI_DEV_STOPPED: |
| 553 | case SCI_DEV_STARTING: |
| 554 | case SCI_STP_DEV_NCQ_ERROR: |
| 555 | case SCI_DEV_STOPPING: |
| 556 | case SCI_DEV_FAILED: |
| 557 | case SCI_DEV_RESETTING: |
| 558 | case SCI_DEV_FINAL: |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 559 | default: |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 560 | dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n", |
| 561 | __func__, dev_state_name(state)); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 562 | return SCI_FAILURE_INVALID_STATE; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 563 | case SCI_DEV_READY: |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 564 | /* attempt to start an io request for this device object. The remote |
| 565 | * device object will issue the start request for the io and if |
| 566 | * successful it will start the request for the port object then |
| 567 | * increment its own request count. |
| 568 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 569 | status = sci_port_start_io(iport, idev, ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 570 | if (status != SCI_SUCCESS) |
| 571 | return status; |
| 572 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 573 | status = sci_remote_node_context_start_io(&idev->rnc, ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 574 | if (status != SCI_SUCCESS) |
| 575 | break; |
| 576 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 577 | status = sci_request_start(ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 578 | break; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 579 | case SCI_STP_DEV_IDLE: { |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 580 | /* handle the start io operation for a sata device that is in |
| 581 | * the command idle state. - Evalute the type of IO request to |
| 582 | * be started - If its an NCQ request change to NCQ substate - |
| 583 | * If its any other command change to the CMD substate |
| 584 | * |
| 585 | * If this is a softreset we may want to have a different |
| 586 | * substate. |
| 587 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 588 | enum sci_remote_device_states new_state; |
Dave Jiang | e76d618 | 2011-05-04 15:02:03 -0700 | [diff] [blame] | 589 | struct sas_task *task = isci_request_access_task(ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 590 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 591 | status = sci_port_start_io(iport, idev, ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 592 | if (status != SCI_SUCCESS) |
| 593 | return status; |
| 594 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 595 | status = sci_remote_node_context_start_io(&idev->rnc, ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 596 | if (status != SCI_SUCCESS) |
| 597 | break; |
| 598 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 599 | status = sci_request_start(ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 600 | if (status != SCI_SUCCESS) |
| 601 | break; |
| 602 | |
Dave Jiang | e76d618 | 2011-05-04 15:02:03 -0700 | [diff] [blame] | 603 | if (task->ata_task.use_ncq) |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 604 | new_state = SCI_STP_DEV_NCQ; |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 605 | else { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 606 | idev->working_request = ireq; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 607 | new_state = SCI_STP_DEV_CMD; |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 608 | } |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 609 | sci_change_state(sm, new_state); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 610 | break; |
| 611 | } |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 612 | case SCI_STP_DEV_NCQ: { |
Dave Jiang | e76d618 | 2011-05-04 15:02:03 -0700 | [diff] [blame] | 613 | struct sas_task *task = isci_request_access_task(ireq); |
| 614 | |
| 615 | if (task->ata_task.use_ncq) { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 616 | status = sci_port_start_io(iport, idev, ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 617 | if (status != SCI_SUCCESS) |
| 618 | return status; |
| 619 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 620 | status = sci_remote_node_context_start_io(&idev->rnc, ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 621 | if (status != SCI_SUCCESS) |
| 622 | break; |
| 623 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 624 | status = sci_request_start(ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 625 | } else |
| 626 | return SCI_FAILURE_INVALID_STATE; |
| 627 | break; |
Dave Jiang | e76d618 | 2011-05-04 15:02:03 -0700 | [diff] [blame] | 628 | } |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 629 | case SCI_STP_DEV_AWAIT_RESET: |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 630 | return SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 631 | case SCI_SMP_DEV_IDLE: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 632 | status = sci_port_start_io(iport, idev, ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 633 | if (status != SCI_SUCCESS) |
| 634 | return status; |
| 635 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 636 | status = sci_remote_node_context_start_io(&idev->rnc, ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 637 | if (status != SCI_SUCCESS) |
| 638 | break; |
| 639 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 640 | status = sci_request_start(ireq); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 641 | if (status != SCI_SUCCESS) |
| 642 | break; |
| 643 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 644 | idev->working_request = ireq; |
| 645 | sci_change_state(&idev->sm, SCI_SMP_DEV_CMD); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 646 | break; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 647 | case SCI_STP_DEV_CMD: |
| 648 | case SCI_SMP_DEV_CMD: |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 649 | /* device is already handling a command it can not accept new commands |
| 650 | * until this one is complete. |
| 651 | */ |
| 652 | return SCI_FAILURE_INVALID_STATE; |
| 653 | } |
| 654 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 655 | sci_remote_device_start_request(idev, ireq, status); |
Dan Williams | 1860655 | 2011-05-01 14:57:11 -0700 | [diff] [blame] | 656 | return status; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 657 | } |
| 658 | |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 659 | static enum sci_status common_complete_io(struct isci_port *iport, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 660 | struct isci_remote_device *idev, |
Dan Williams | 5076a1a | 2011-06-27 14:57:03 -0700 | [diff] [blame] | 661 | struct isci_request *ireq) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 662 | { |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 663 | enum sci_status status; |
| 664 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 665 | status = sci_request_complete(ireq); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 666 | if (status != SCI_SUCCESS) |
| 667 | return status; |
| 668 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 669 | status = sci_port_complete_io(iport, idev, ireq); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 670 | if (status != SCI_SUCCESS) |
| 671 | return status; |
| 672 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 673 | sci_remote_device_decrement_request_count(idev); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 674 | return status; |
| 675 | } |
| 676 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 677 | enum sci_status sci_remote_device_complete_io(struct isci_host *ihost, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 678 | struct isci_remote_device *idev, |
Dan Williams | 5076a1a | 2011-06-27 14:57:03 -0700 | [diff] [blame] | 679 | struct isci_request *ireq) |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 680 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 681 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 682 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 683 | struct isci_port *iport = idev->owning_port; |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 684 | enum sci_status status; |
| 685 | |
| 686 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 687 | case SCI_DEV_INITIAL: |
| 688 | case SCI_DEV_STOPPED: |
| 689 | case SCI_DEV_STARTING: |
| 690 | case SCI_STP_DEV_IDLE: |
| 691 | case SCI_SMP_DEV_IDLE: |
| 692 | case SCI_DEV_FAILED: |
| 693 | case SCI_DEV_FINAL: |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 694 | default: |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 695 | dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n", |
| 696 | __func__, dev_state_name(state)); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 697 | return SCI_FAILURE_INVALID_STATE; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 698 | case SCI_DEV_READY: |
| 699 | case SCI_STP_DEV_AWAIT_RESET: |
| 700 | case SCI_DEV_RESETTING: |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 701 | status = common_complete_io(iport, idev, ireq); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 702 | break; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 703 | case SCI_STP_DEV_CMD: |
| 704 | case SCI_STP_DEV_NCQ: |
| 705 | case SCI_STP_DEV_NCQ_ERROR: |
Dan Williams | b50102d | 2011-09-30 18:52:19 -0700 | [diff] [blame] | 706 | case SCI_STP_DEV_ATAPI_ERROR: |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 707 | status = common_complete_io(iport, idev, ireq); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 708 | if (status != SCI_SUCCESS) |
| 709 | break; |
| 710 | |
Dan Williams | 5076a1a | 2011-06-27 14:57:03 -0700 | [diff] [blame] | 711 | if (ireq->sci_status == SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) { |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 712 | /* This request causes hardware error, device needs to be Lun Reset. |
| 713 | * So here we force the state machine to IDLE state so the rest IOs |
| 714 | * can reach RNC state handler, these IOs will be completed by RNC with |
| 715 | * status of "DEVICE_RESET_REQUIRED", instead of "INVALID STATE". |
| 716 | */ |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 717 | sci_change_state(sm, SCI_STP_DEV_AWAIT_RESET); |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 718 | } else if (idev->started_request_count == 0) |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 719 | sci_change_state(sm, SCI_STP_DEV_IDLE); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 720 | break; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 721 | case SCI_SMP_DEV_CMD: |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 722 | status = common_complete_io(iport, idev, ireq); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 723 | if (status != SCI_SUCCESS) |
| 724 | break; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 725 | sci_change_state(sm, SCI_SMP_DEV_IDLE); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 726 | break; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 727 | case SCI_DEV_STOPPING: |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 728 | status = common_complete_io(iport, idev, ireq); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 729 | if (status != SCI_SUCCESS) |
| 730 | break; |
| 731 | |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 732 | if (idev->started_request_count == 0) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 733 | sci_remote_node_context_destruct(&idev->rnc, |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 734 | rnc_destruct_done, |
| 735 | idev); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 736 | break; |
| 737 | } |
| 738 | |
| 739 | if (status != SCI_SUCCESS) |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 740 | dev_err(scirdev_to_dev(idev), |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 741 | "%s: Port:0x%p Device:0x%p Request:0x%p Status:0x%x " |
Dan Williams | ffe191c | 2011-06-29 13:09:25 -0700 | [diff] [blame] | 742 | "could not complete\n", __func__, iport, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 743 | idev, ireq, status); |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 744 | else |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 745 | isci_put_device(idev); |
Dan Williams | 10a09e6 | 2011-05-01 15:33:43 -0700 | [diff] [blame] | 746 | |
| 747 | return status; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 748 | } |
| 749 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 750 | static void sci_remote_device_continue_request(void *dev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 751 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 752 | struct isci_remote_device *idev = dev; |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 753 | |
| 754 | /* we need to check if this request is still valid to continue. */ |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 755 | if (idev->working_request) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 756 | sci_controller_continue_io(idev->working_request); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 757 | } |
| 758 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 759 | enum sci_status sci_remote_device_start_task(struct isci_host *ihost, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 760 | struct isci_remote_device *idev, |
Dan Williams | 5076a1a | 2011-06-27 14:57:03 -0700 | [diff] [blame] | 761 | struct isci_request *ireq) |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 762 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 763 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 764 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 765 | struct isci_port *iport = idev->owning_port; |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 766 | enum sci_status status; |
| 767 | |
| 768 | switch (state) { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 769 | case SCI_DEV_INITIAL: |
| 770 | case SCI_DEV_STOPPED: |
| 771 | case SCI_DEV_STARTING: |
| 772 | case SCI_SMP_DEV_IDLE: |
| 773 | case SCI_SMP_DEV_CMD: |
| 774 | case SCI_DEV_STOPPING: |
| 775 | case SCI_DEV_FAILED: |
| 776 | case SCI_DEV_RESETTING: |
| 777 | case SCI_DEV_FINAL: |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 778 | default: |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 779 | dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n", |
| 780 | __func__, dev_state_name(state)); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 781 | return SCI_FAILURE_INVALID_STATE; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 782 | case SCI_STP_DEV_IDLE: |
| 783 | case SCI_STP_DEV_CMD: |
| 784 | case SCI_STP_DEV_NCQ: |
| 785 | case SCI_STP_DEV_NCQ_ERROR: |
| 786 | case SCI_STP_DEV_AWAIT_RESET: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 787 | status = sci_port_start_io(iport, idev, ireq); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 788 | if (status != SCI_SUCCESS) |
| 789 | return status; |
| 790 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 791 | status = sci_request_start(ireq); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 792 | if (status != SCI_SUCCESS) |
| 793 | goto out; |
| 794 | |
| 795 | /* Note: If the remote device state is not IDLE this will |
| 796 | * replace the request that probably resulted in the task |
| 797 | * management request. |
| 798 | */ |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 799 | idev->working_request = ireq; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 800 | sci_change_state(sm, SCI_STP_DEV_CMD); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 801 | |
| 802 | /* The remote node context must cleanup the TCi to NCQ mapping |
| 803 | * table. The only way to do this correctly is to either write |
| 804 | * to the TLCR register or to invalidate and repost the RNC. In |
| 805 | * either case the remote node context state machine will take |
| 806 | * the correct action when the remote node context is suspended |
| 807 | * and later resumed. |
| 808 | */ |
Jeff Skirvin | c94fc1a | 2012-03-08 22:41:58 -0800 | [diff] [blame] | 809 | sci_remote_device_suspend(idev, |
| 810 | SCI_SW_SUSPEND_LINKHANG_DETECT); |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 811 | |
| 812 | status = sci_remote_node_context_start_task(&idev->rnc, ireq, |
| 813 | sci_remote_device_continue_request, idev); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 814 | |
| 815 | out: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 816 | sci_remote_device_start_request(idev, ireq, status); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 817 | /* We need to let the controller start request handler know that |
| 818 | * it can't post TC yet. We will provide a callback function to |
| 819 | * post TC when RNC gets resumed. |
| 820 | */ |
| 821 | return SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 822 | case SCI_DEV_READY: |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 823 | status = sci_port_start_io(iport, idev, ireq); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 824 | if (status != SCI_SUCCESS) |
| 825 | return status; |
| 826 | |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 827 | /* Resume the RNC as needed: */ |
| 828 | status = sci_remote_node_context_start_task(&idev->rnc, ireq, |
| 829 | NULL, NULL); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 830 | if (status != SCI_SUCCESS) |
| 831 | break; |
| 832 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 833 | status = sci_request_start(ireq); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 834 | break; |
| 835 | } |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 836 | sci_remote_device_start_request(idev, ireq, status); |
Dan Williams | 84b9b02 | 2011-05-01 15:53:25 -0700 | [diff] [blame] | 837 | |
| 838 | return status; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 839 | } |
| 840 | |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 841 | void sci_remote_device_post_request(struct isci_remote_device *idev, u32 request) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 842 | { |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 843 | struct isci_port *iport = idev->owning_port; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 844 | u32 context; |
| 845 | |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 846 | context = request | |
| 847 | (ISCI_PEG << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) | |
| 848 | (iport->physical_port_index << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) | |
| 849 | idev->rnc.remote_node_index; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 850 | |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 851 | sci_controller_post_request(iport->owning_controller, context); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 852 | } |
| 853 | |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 854 | /* called once the remote node context has transisitioned to a |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 855 | * ready state. This is the indication that the remote device object can also |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 856 | * transition to ready. |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 857 | */ |
Dan Williams | eb22967 | 2011-05-01 14:05:57 -0700 | [diff] [blame] | 858 | static void remote_device_resume_done(void *_dev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 859 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 860 | struct isci_remote_device *idev = _dev; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 861 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 862 | if (is_remote_device_ready(idev)) |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 863 | return; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 864 | |
Dan Williams | e622571 | 2011-05-01 16:26:09 -0700 | [diff] [blame] | 865 | /* go 'ready' if we are not already in a ready state */ |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 866 | sci_change_state(&idev->sm, SCI_DEV_READY); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 867 | } |
| 868 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 869 | static void sci_stp_remote_device_ready_idle_substate_resume_complete_handler(void *_dev) |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 870 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 871 | struct isci_remote_device *idev = _dev; |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 872 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 873 | |
| 874 | /* For NCQ operation we do not issue a isci_remote_device_not_ready(). |
| 875 | * As a result, avoid sending the ready notification. |
| 876 | */ |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 877 | if (idev->sm.previous_state_id != SCI_STP_DEV_NCQ) |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 878 | isci_remote_device_ready(ihost, idev); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 879 | } |
| 880 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 881 | static void sci_remote_device_initial_state_enter(struct sci_base_state_machine *sm) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 882 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 883 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 884 | |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 885 | /* Initial state is a transitional state to the stopped state */ |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 886 | sci_change_state(&idev->sm, SCI_DEV_STOPPED); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 890 | * sci_remote_device_destruct() - free remote node context and destruct |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 891 | * @remote_device: This parameter specifies the remote device to be destructed. |
| 892 | * |
| 893 | * Remote device objects are a limited resource. As such, they must be |
| 894 | * protected. Thus calls to construct and destruct are mutually exclusive and |
| 895 | * non-reentrant. The return value shall indicate if the device was |
| 896 | * successfully destructed or if some failure occurred. enum sci_status This value |
| 897 | * is returned if the device is successfully destructed. |
| 898 | * SCI_FAILURE_INVALID_REMOTE_DEVICE This value is returned if the supplied |
| 899 | * device isn't valid (e.g. it's already been destoryed, the handle isn't |
| 900 | * valid, etc.). |
| 901 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 902 | static enum sci_status sci_remote_device_destruct(struct isci_remote_device *idev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 903 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 904 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 905 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 906 | struct isci_host *ihost; |
Dan Williams | b8d82f6 | 2011-05-01 14:38:26 -0700 | [diff] [blame] | 907 | |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 908 | if (state != SCI_DEV_STOPPED) { |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 909 | dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n", |
| 910 | __func__, dev_state_name(state)); |
Dan Williams | b8d82f6 | 2011-05-01 14:38:26 -0700 | [diff] [blame] | 911 | return SCI_FAILURE_INVALID_STATE; |
| 912 | } |
| 913 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 914 | ihost = idev->owning_port->owning_controller; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 915 | sci_controller_free_remote_node_context(ihost, idev, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 916 | idev->rnc.remote_node_index); |
| 917 | idev->rnc.remote_node_index = SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 918 | sci_change_state(sm, SCI_DEV_FINAL); |
Dan Williams | b8d82f6 | 2011-05-01 14:38:26 -0700 | [diff] [blame] | 919 | |
| 920 | return SCI_SUCCESS; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 921 | } |
| 922 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 923 | /** |
| 924 | * isci_remote_device_deconstruct() - This function frees an isci_remote_device. |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 925 | * @ihost: This parameter specifies the isci host object. |
| 926 | * @idev: This parameter specifies the remote device to be freed. |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 927 | * |
| 928 | */ |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 929 | static void isci_remote_device_deconstruct(struct isci_host *ihost, struct isci_remote_device *idev) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 930 | { |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 931 | dev_dbg(&ihost->pdev->dev, |
| 932 | "%s: isci_device = %p\n", __func__, idev); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 933 | |
| 934 | /* There should not be any outstanding io's. All paths to |
| 935 | * here should go through isci_remote_device_nuke_requests. |
| 936 | * If we hit this condition, we will need a way to complete |
| 937 | * io requests in process */ |
Jeff Skirvin | d6b2a0e | 2012-03-08 22:41:57 -0800 | [diff] [blame] | 938 | BUG_ON(idev->started_request_count > 0); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 939 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 940 | sci_remote_device_destruct(idev); |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 941 | list_del_init(&idev->node); |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 942 | isci_put_device(idev); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 943 | } |
| 944 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 945 | static void sci_remote_device_stopped_state_enter(struct sci_base_state_machine *sm) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 946 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 947 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 948 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 949 | u32 prev_state; |
| 950 | |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 951 | /* If we are entering from the stopping state let the SCI User know that |
| 952 | * the stop operation has completed. |
| 953 | */ |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 954 | prev_state = idev->sm.previous_state_id; |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 955 | if (prev_state == SCI_DEV_STOPPING) |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 956 | isci_remote_device_deconstruct(ihost, idev); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 957 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 958 | sci_controller_remote_device_stopped(ihost, idev); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 959 | } |
| 960 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 961 | static void sci_remote_device_starting_state_enter(struct sci_base_state_machine *sm) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 962 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 963 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 964 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 965 | |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 966 | isci_remote_device_not_ready(ihost, idev, |
| 967 | SCIC_REMOTE_DEVICE_NOT_READY_START_REQUESTED); |
| 968 | } |
| 969 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 970 | static void sci_remote_device_ready_state_enter(struct sci_base_state_machine *sm) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 971 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 972 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 973 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Artur Wojcik | cc3dbd0 | 2011-05-04 07:58:16 +0000 | [diff] [blame] | 974 | struct domain_device *dev = idev->domain_dev; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 975 | |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 976 | if (dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_SATA)) { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 977 | sci_change_state(&idev->sm, SCI_STP_DEV_IDLE); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 978 | } else if (dev_is_expander(dev)) { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 979 | sci_change_state(&idev->sm, SCI_SMP_DEV_IDLE); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 980 | } else |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 981 | isci_remote_device_ready(ihost, idev); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 982 | } |
| 983 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 984 | static void sci_remote_device_ready_state_exit(struct sci_base_state_machine *sm) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 985 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 986 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
| 987 | struct domain_device *dev = idev->domain_dev; |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 988 | |
| 989 | if (dev->dev_type == SAS_END_DEV) { |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 990 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 991 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 992 | isci_remote_device_not_ready(ihost, idev, |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 993 | SCIC_REMOTE_DEVICE_NOT_READY_STOP_REQUESTED); |
| 994 | } |
| 995 | } |
| 996 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 997 | static void sci_remote_device_resetting_state_enter(struct sci_base_state_machine *sm) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 998 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 999 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Jeff Skirvin | ac78ed0 | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1000 | struct isci_host *ihost = idev->owning_port->owning_controller; |
| 1001 | |
| 1002 | dev_dbg(&ihost->pdev->dev, |
| 1003 | "%s: isci_device = %p\n", __func__, idev); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1004 | |
Jeff Skirvin | c94fc1a | 2012-03-08 22:41:58 -0800 | [diff] [blame] | 1005 | sci_remote_device_suspend(idev, SCI_SW_SUSPEND_LINKHANG_DETECT); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1006 | } |
| 1007 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1008 | static void sci_remote_device_resetting_state_exit(struct sci_base_state_machine *sm) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1009 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1010 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Jeff Skirvin | ac78ed0 | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1011 | struct isci_host *ihost = idev->owning_port->owning_controller; |
| 1012 | |
| 1013 | dev_dbg(&ihost->pdev->dev, |
| 1014 | "%s: isci_device = %p\n", __func__, idev); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1015 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1016 | sci_remote_node_context_resume(&idev->rnc, NULL, NULL); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1017 | } |
| 1018 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1019 | static void sci_stp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm) |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1020 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1021 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1022 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1023 | idev->working_request = NULL; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1024 | if (sci_remote_node_context_is_ready(&idev->rnc)) { |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1025 | /* |
| 1026 | * Since the RNC is ready, it's alright to finish completion |
| 1027 | * processing (e.g. signal the remote device is ready). */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1028 | sci_stp_remote_device_ready_idle_substate_resume_complete_handler(idev); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1029 | } else { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1030 | sci_remote_node_context_resume(&idev->rnc, |
| 1031 | sci_stp_remote_device_ready_idle_substate_resume_complete_handler, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1032 | idev); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1033 | } |
| 1034 | } |
| 1035 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1036 | static void sci_stp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm) |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1037 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1038 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 1039 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1040 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1041 | BUG_ON(idev->working_request == NULL); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1042 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1043 | isci_remote_device_not_ready(ihost, idev, |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1044 | SCIC_REMOTE_DEVICE_NOT_READY_SATA_REQUEST_STARTED); |
| 1045 | } |
| 1046 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1047 | static void sci_stp_remote_device_ready_ncq_error_substate_enter(struct sci_base_state_machine *sm) |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1048 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1049 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 1050 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1051 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1052 | if (idev->not_ready_reason == SCIC_REMOTE_DEVICE_NOT_READY_SATA_SDB_ERROR_FIS_RECEIVED) |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1053 | isci_remote_device_not_ready(ihost, idev, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1054 | idev->not_ready_reason); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1055 | } |
| 1056 | |
Jeff Skirvin | ac78ed0 | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1057 | static void sci_stp_remote_device_atapi_error_substate_enter( |
| 1058 | struct sci_base_state_machine *sm) |
| 1059 | { |
| 1060 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
| 1061 | |
| 1062 | /* This state is entered when an I/O is decoded with an error |
| 1063 | * condition. By this point the RNC expected suspension state is set. |
| 1064 | * The error conditions suspend the device, so unsuspend here if |
| 1065 | * possible. |
| 1066 | */ |
| 1067 | sci_remote_node_context_resume(&idev->rnc, |
| 1068 | atapi_remote_device_resume_done, |
| 1069 | idev); |
| 1070 | } |
| 1071 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1072 | static void sci_smp_remote_device_ready_idle_substate_enter(struct sci_base_state_machine *sm) |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1073 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1074 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 1075 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1076 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1077 | isci_remote_device_ready(ihost, idev); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1078 | } |
| 1079 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1080 | static void sci_smp_remote_device_ready_cmd_substate_enter(struct sci_base_state_machine *sm) |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1081 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1082 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | 34a9915 | 2011-07-01 02:25:15 -0700 | [diff] [blame] | 1083 | struct isci_host *ihost = idev->owning_port->owning_controller; |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1084 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1085 | BUG_ON(idev->working_request == NULL); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1086 | |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1087 | isci_remote_device_not_ready(ihost, idev, |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1088 | SCIC_REMOTE_DEVICE_NOT_READY_SMP_REQUEST_STARTED); |
| 1089 | } |
| 1090 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1091 | static void sci_smp_remote_device_ready_cmd_substate_exit(struct sci_base_state_machine *sm) |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1092 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1093 | struct isci_remote_device *idev = container_of(sm, typeof(*idev), sm); |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1094 | |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1095 | idev->working_request = NULL; |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1096 | } |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1097 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1098 | static const struct sci_base_state sci_remote_device_state_table[] = { |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1099 | [SCI_DEV_INITIAL] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1100 | .enter_state = sci_remote_device_initial_state_enter, |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1101 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1102 | [SCI_DEV_STOPPED] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1103 | .enter_state = sci_remote_device_stopped_state_enter, |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1104 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1105 | [SCI_DEV_STARTING] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1106 | .enter_state = sci_remote_device_starting_state_enter, |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1107 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1108 | [SCI_DEV_READY] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1109 | .enter_state = sci_remote_device_ready_state_enter, |
| 1110 | .exit_state = sci_remote_device_ready_state_exit |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1111 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1112 | [SCI_STP_DEV_IDLE] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1113 | .enter_state = sci_stp_remote_device_ready_idle_substate_enter, |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1114 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1115 | [SCI_STP_DEV_CMD] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1116 | .enter_state = sci_stp_remote_device_ready_cmd_substate_enter, |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1117 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1118 | [SCI_STP_DEV_NCQ] = { }, |
| 1119 | [SCI_STP_DEV_NCQ_ERROR] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1120 | .enter_state = sci_stp_remote_device_ready_ncq_error_substate_enter, |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1121 | }, |
Jeff Skirvin | ac78ed0 | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1122 | [SCI_STP_DEV_ATAPI_ERROR] = { |
| 1123 | .enter_state = sci_stp_remote_device_atapi_error_substate_enter, |
| 1124 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1125 | [SCI_STP_DEV_AWAIT_RESET] = { }, |
| 1126 | [SCI_SMP_DEV_IDLE] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1127 | .enter_state = sci_smp_remote_device_ready_idle_substate_enter, |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1128 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1129 | [SCI_SMP_DEV_CMD] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1130 | .enter_state = sci_smp_remote_device_ready_cmd_substate_enter, |
| 1131 | .exit_state = sci_smp_remote_device_ready_cmd_substate_exit, |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1132 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1133 | [SCI_DEV_STOPPING] = { }, |
| 1134 | [SCI_DEV_FAILED] = { }, |
| 1135 | [SCI_DEV_RESETTING] = { |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1136 | .enter_state = sci_remote_device_resetting_state_enter, |
| 1137 | .exit_state = sci_remote_device_resetting_state_exit |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1138 | }, |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1139 | [SCI_DEV_FINAL] = { }, |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1140 | }; |
| 1141 | |
| 1142 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1143 | * sci_remote_device_construct() - common construction |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1144 | * @sci_port: SAS/SATA port through which this device is accessed. |
| 1145 | * @sci_dev: remote device to construct |
| 1146 | * |
Dan Williams | b87ee30 | 2011-04-25 11:48:29 -0700 | [diff] [blame] | 1147 | * This routine just performs benign initialization and does not |
| 1148 | * allocate the remote_node_context which is left to |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1149 | * sci_remote_device_[de]a_construct(). sci_remote_device_destruct() |
Dan Williams | b87ee30 | 2011-04-25 11:48:29 -0700 | [diff] [blame] | 1150 | * frees the remote_node_context(s) for the device. |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1151 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1152 | static void sci_remote_device_construct(struct isci_port *iport, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1153 | struct isci_remote_device *idev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1154 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1155 | idev->owning_port = iport; |
| 1156 | idev->started_request_count = 0; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1157 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1158 | sci_init_sm(&idev->sm, sci_remote_device_state_table, SCI_DEV_INITIAL); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1159 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1160 | sci_remote_node_context_construct(&idev->rnc, |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1161 | SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1162 | } |
| 1163 | |
| 1164 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1165 | * sci_remote_device_da_construct() - construct direct attached device. |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1166 | * |
Dan Williams | b87ee30 | 2011-04-25 11:48:29 -0700 | [diff] [blame] | 1167 | * The information (e.g. IAF, Signature FIS, etc.) necessary to build |
| 1168 | * the device is known to the SCI Core since it is contained in the |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1169 | * sci_phy object. Remote node context(s) is/are a global resource |
| 1170 | * allocated by this routine, freed by sci_remote_device_destruct(). |
Dan Williams | b87ee30 | 2011-04-25 11:48:29 -0700 | [diff] [blame] | 1171 | * |
| 1172 | * Returns: |
| 1173 | * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed. |
| 1174 | * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to |
| 1175 | * sata-only controller instance. |
| 1176 | * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted. |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1177 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1178 | static enum sci_status sci_remote_device_da_construct(struct isci_port *iport, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1179 | struct isci_remote_device *idev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1180 | { |
| 1181 | enum sci_status status; |
Bartek Nowakowski | 7e62984 | 2012-01-04 01:33:20 -0800 | [diff] [blame] | 1182 | struct sci_port_properties properties; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1183 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1184 | sci_remote_device_construct(iport, idev); |
Dan Williams | b87ee30 | 2011-04-25 11:48:29 -0700 | [diff] [blame] | 1185 | |
Bartek Nowakowski | 7e62984 | 2012-01-04 01:33:20 -0800 | [diff] [blame] | 1186 | sci_port_get_properties(iport, &properties); |
| 1187 | /* Get accurate port width from port's phy mask for a DA device. */ |
| 1188 | idev->device_port_width = hweight32(properties.phy_mask); |
| 1189 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1190 | status = sci_controller_allocate_remote_node_context(iport->owning_controller, |
Dan Williams | 11cc518 | 2012-02-01 00:23:10 -0800 | [diff] [blame] | 1191 | idev, |
| 1192 | &idev->rnc.remote_node_index); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1193 | |
Dan Williams | a1a113b | 2011-04-21 18:44:45 -0700 | [diff] [blame] | 1194 | if (status != SCI_SUCCESS) |
| 1195 | return status; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1196 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1197 | idev->connection_rate = sci_port_get_max_allowed_speed(iport); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1198 | |
Dan Williams | a1a113b | 2011-04-21 18:44:45 -0700 | [diff] [blame] | 1199 | return SCI_SUCCESS; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1200 | } |
| 1201 | |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1202 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1203 | * sci_remote_device_ea_construct() - construct expander attached device |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1204 | * |
Dan Williams | b87ee30 | 2011-04-25 11:48:29 -0700 | [diff] [blame] | 1205 | * Remote node context(s) is/are a global resource allocated by this |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1206 | * routine, freed by sci_remote_device_destruct(). |
Dan Williams | b87ee30 | 2011-04-25 11:48:29 -0700 | [diff] [blame] | 1207 | * |
| 1208 | * Returns: |
| 1209 | * SCI_FAILURE_DEVICE_EXISTS - device has already been constructed. |
| 1210 | * SCI_FAILURE_UNSUPPORTED_PROTOCOL - e.g. sas device attached to |
| 1211 | * sata-only controller instance. |
| 1212 | * SCI_FAILURE_INSUFFICIENT_RESOURCES - remote node contexts exhausted. |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1213 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1214 | static enum sci_status sci_remote_device_ea_construct(struct isci_port *iport, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1215 | struct isci_remote_device *idev) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1216 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1217 | struct domain_device *dev = idev->domain_dev; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1218 | enum sci_status status; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1219 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1220 | sci_remote_device_construct(iport, idev); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1221 | |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1222 | status = sci_controller_allocate_remote_node_context(iport->owning_controller, |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1223 | idev, |
| 1224 | &idev->rnc.remote_node_index); |
Dan Williams | a1a113b | 2011-04-21 18:44:45 -0700 | [diff] [blame] | 1225 | if (status != SCI_SUCCESS) |
| 1226 | return status; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1227 | |
Dan Williams | 11cc518 | 2012-02-01 00:23:10 -0800 | [diff] [blame] | 1228 | /* For SAS-2 the physical link rate is actually a logical link |
Dan Williams | a1a113b | 2011-04-21 18:44:45 -0700 | [diff] [blame] | 1229 | * rate that incorporates multiplexing. The SCU doesn't |
| 1230 | * incorporate multiplexing and for the purposes of the |
| 1231 | * connection the logical link rate is that same as the |
| 1232 | * physical. Furthermore, the SAS-2 and SAS-1.1 fields overlay |
Dan Williams | 11cc518 | 2012-02-01 00:23:10 -0800 | [diff] [blame] | 1233 | * one another, so this code works for both situations. |
| 1234 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1235 | idev->connection_rate = min_t(u16, sci_port_get_max_allowed_speed(iport), |
Dan Williams | 00d680e | 2011-04-25 14:29:29 -0700 | [diff] [blame] | 1236 | dev->linkrate); |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1237 | |
Dan Williams | a1a113b | 2011-04-21 18:44:45 -0700 | [diff] [blame] | 1238 | /* / @todo Should I assign the port width by reading all of the phys on the port? */ |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1239 | idev->device_port_width = 1; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1240 | |
Dan Williams | ab2e8f7 | 2011-04-27 16:32:45 -0700 | [diff] [blame] | 1241 | return SCI_SUCCESS; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1242 | } |
| 1243 | |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 1244 | enum sci_status sci_remote_device_resume( |
| 1245 | struct isci_remote_device *idev, |
| 1246 | scics_sds_remote_node_context_callback cb_fn, |
| 1247 | void *cb_p) |
| 1248 | { |
| 1249 | enum sci_status status; |
| 1250 | |
| 1251 | status = sci_remote_node_context_resume(&idev->rnc, cb_fn, cb_p); |
| 1252 | if (status != SCI_SUCCESS) |
| 1253 | dev_dbg(scirdev_to_dev(idev), "%s: failed to resume: %d\n", |
| 1254 | __func__, status); |
| 1255 | return status; |
| 1256 | } |
| 1257 | |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 1258 | enum sci_status isci_remote_device_resume_from_abort( |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 1259 | struct isci_host *ihost, |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 1260 | struct isci_remote_device *idev) |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 1261 | { |
| 1262 | unsigned long flags; |
| 1263 | enum sci_status status; |
| 1264 | |
| 1265 | spin_lock_irqsave(&ihost->scic_lock, flags); |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 1266 | /* Preserve any current resume callbacks, for instance from other |
| 1267 | * resumptions. |
| 1268 | */ |
Jeff Skirvin | 0c3ce38 | 2012-03-08 22:42:02 -0800 | [diff] [blame^] | 1269 | clear_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags); |
Jeff Skirvin | 31a38ef | 2012-03-08 22:42:01 -0800 | [diff] [blame] | 1270 | status = sci_remote_device_resume(idev, idev->rnc.user_callback, |
| 1271 | idev->rnc.user_cookie); |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 1272 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 1273 | return status; |
| 1274 | } |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1275 | /** |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1276 | * sci_remote_device_start() - This method will start the supplied remote |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1277 | * device. This method enables normal IO requests to flow through to the |
| 1278 | * remote device. |
| 1279 | * @remote_device: This parameter specifies the device to be started. |
| 1280 | * @timeout: This parameter specifies the number of milliseconds in which the |
| 1281 | * start operation should complete. |
| 1282 | * |
| 1283 | * An indication of whether the device was successfully started. SCI_SUCCESS |
| 1284 | * This value is returned if the device was successfully started. |
| 1285 | * SCI_FAILURE_INVALID_PHY This value is returned if the user attempts to start |
| 1286 | * the device when there have been no phys added to it. |
| 1287 | */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1288 | static enum sci_status sci_remote_device_start(struct isci_remote_device *idev, |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1289 | u32 timeout) |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1290 | { |
Dan Williams | 78a6f06 | 2011-06-30 16:31:37 -0700 | [diff] [blame] | 1291 | struct sci_base_state_machine *sm = &idev->sm; |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1292 | enum sci_remote_device_states state = sm->current_state_id; |
Dan Williams | eb22967 | 2011-05-01 14:05:57 -0700 | [diff] [blame] | 1293 | enum sci_status status; |
| 1294 | |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1295 | if (state != SCI_DEV_STOPPED) { |
Dan Williams | d7a0ccd | 2012-02-10 01:18:44 -0800 | [diff] [blame] | 1296 | dev_warn(scirdev_to_dev(idev), "%s: in wrong state: %s\n", |
| 1297 | __func__, dev_state_name(state)); |
Dan Williams | eb22967 | 2011-05-01 14:05:57 -0700 | [diff] [blame] | 1298 | return SCI_FAILURE_INVALID_STATE; |
| 1299 | } |
| 1300 | |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 1301 | status = sci_remote_device_resume(idev, remote_device_resume_done, |
| 1302 | idev); |
Dan Williams | eb22967 | 2011-05-01 14:05:57 -0700 | [diff] [blame] | 1303 | if (status != SCI_SUCCESS) |
| 1304 | return status; |
| 1305 | |
Edmund Nadolski | e301370 | 2011-06-02 00:10:43 +0000 | [diff] [blame] | 1306 | sci_change_state(sm, SCI_DEV_STARTING); |
Dan Williams | eb22967 | 2011-05-01 14:05:57 -0700 | [diff] [blame] | 1307 | |
| 1308 | return SCI_SUCCESS; |
Dan Williams | 88f3b62 | 2011-04-22 19:18:03 -0700 | [diff] [blame] | 1309 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1310 | |
Dan Williams | 00d680e | 2011-04-25 14:29:29 -0700 | [diff] [blame] | 1311 | static enum sci_status isci_remote_device_construct(struct isci_port *iport, |
| 1312 | struct isci_remote_device *idev) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1313 | { |
Dan Williams | 00d680e | 2011-04-25 14:29:29 -0700 | [diff] [blame] | 1314 | struct isci_host *ihost = iport->isci_host; |
| 1315 | struct domain_device *dev = idev->domain_dev; |
| 1316 | enum sci_status status; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1317 | |
Dan Williams | 00d680e | 2011-04-25 14:29:29 -0700 | [diff] [blame] | 1318 | if (dev->parent && dev_is_expander(dev->parent)) |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1319 | status = sci_remote_device_ea_construct(iport, idev); |
Dan Williams | 00d680e | 2011-04-25 14:29:29 -0700 | [diff] [blame] | 1320 | else |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1321 | status = sci_remote_device_da_construct(iport, idev); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1322 | |
| 1323 | if (status != SCI_SUCCESS) { |
Dan Williams | 00d680e | 2011-04-25 14:29:29 -0700 | [diff] [blame] | 1324 | dev_dbg(&ihost->pdev->dev, "%s: construct failed: %d\n", |
| 1325 | __func__, status); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1326 | |
| 1327 | return status; |
| 1328 | } |
| 1329 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1330 | /* start the device. */ |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1331 | status = sci_remote_device_start(idev, ISCI_REMOTE_DEVICE_START_TIMEOUT); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1332 | |
Dan Williams | 00d680e | 2011-04-25 14:29:29 -0700 | [diff] [blame] | 1333 | if (status != SCI_SUCCESS) |
| 1334 | dev_warn(&ihost->pdev->dev, "remote device start failed: %d\n", |
| 1335 | status); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1336 | |
| 1337 | return status; |
| 1338 | } |
| 1339 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1340 | /** |
| 1341 | * This function builds the isci_remote_device when a libsas dev_found message |
| 1342 | * is received. |
| 1343 | * @isci_host: This parameter specifies the isci host object. |
| 1344 | * @port: This parameter specifies the isci_port conected to this device. |
| 1345 | * |
| 1346 | * pointer to new isci_remote_device. |
| 1347 | */ |
| 1348 | static struct isci_remote_device * |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 1349 | isci_remote_device_alloc(struct isci_host *ihost, struct isci_port *iport) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1350 | { |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 1351 | struct isci_remote_device *idev; |
| 1352 | int i; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1353 | |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 1354 | for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) { |
Dan Williams | 57f20f4 | 2011-04-21 18:14:45 -0700 | [diff] [blame] | 1355 | idev = &ihost->devices[i]; |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 1356 | if (!test_and_set_bit(IDEV_ALLOCATED, &idev->flags)) |
| 1357 | break; |
| 1358 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1359 | |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 1360 | if (i >= SCI_MAX_REMOTE_DEVICES) { |
| 1361 | dev_warn(&ihost->pdev->dev, "%s: failed\n", __func__); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1362 | return NULL; |
| 1363 | } |
Bartosz Barcinski | 6cb4d6b | 2011-04-12 17:28:43 -0700 | [diff] [blame] | 1364 | if (WARN_ONCE(!list_empty(&idev->node), "found non-idle remote device\n")) |
| 1365 | return NULL; |
| 1366 | |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 1367 | return idev; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1368 | } |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1369 | |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1370 | void isci_remote_device_release(struct kref *kref) |
| 1371 | { |
| 1372 | struct isci_remote_device *idev = container_of(kref, typeof(*idev), kref); |
| 1373 | struct isci_host *ihost = idev->isci_port->isci_host; |
| 1374 | |
| 1375 | idev->domain_dev = NULL; |
| 1376 | idev->isci_port = NULL; |
| 1377 | clear_bit(IDEV_START_PENDING, &idev->flags); |
| 1378 | clear_bit(IDEV_STOP_PENDING, &idev->flags); |
Dan Williams | f208826 | 2011-06-16 11:26:12 -0700 | [diff] [blame] | 1379 | clear_bit(IDEV_IO_READY, &idev->flags); |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1380 | clear_bit(IDEV_GONE, &idev->flags); |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1381 | smp_mb__before_clear_bit(); |
| 1382 | clear_bit(IDEV_ALLOCATED, &idev->flags); |
| 1383 | wake_up(&ihost->eventq); |
| 1384 | } |
| 1385 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1386 | /** |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1387 | * isci_remote_device_stop() - This function is called internally to stop the |
| 1388 | * remote device. |
| 1389 | * @isci_host: This parameter specifies the isci host object. |
| 1390 | * @isci_device: This parameter specifies the remote device. |
| 1391 | * |
Dan Williams | d9dcb4b | 2011-06-30 17:38:32 -0700 | [diff] [blame] | 1392 | * The status of the ihost request to stop. |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1393 | */ |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1394 | enum sci_status isci_remote_device_stop(struct isci_host *ihost, struct isci_remote_device *idev) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1395 | { |
| 1396 | enum sci_status status; |
| 1397 | unsigned long flags; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1398 | |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1399 | dev_dbg(&ihost->pdev->dev, |
| 1400 | "%s: isci_device = %p\n", __func__, idev); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1401 | |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1402 | spin_lock_irqsave(&ihost->scic_lock, flags); |
| 1403 | idev->domain_dev->lldd_dev = NULL; /* disable new lookups */ |
| 1404 | set_bit(IDEV_GONE, &idev->flags); |
Jeff Skirvin | 6e2802a | 2011-03-08 20:32:16 -0700 | [diff] [blame] | 1405 | |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1406 | set_bit(IDEV_STOP_PENDING, &idev->flags); |
Dan Williams | 89a7301 | 2011-06-30 19:14:33 -0700 | [diff] [blame] | 1407 | status = sci_remote_device_stop(idev, 50); |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1408 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1409 | |
| 1410 | /* Wait for the stop complete callback. */ |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1411 | if (WARN_ONCE(status != SCI_SUCCESS, "failed to stop device\n")) |
| 1412 | /* nothing to wait for */; |
| 1413 | else |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1414 | wait_for_device_stop(ihost, idev); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1415 | |
Jeff Skirvin | 8388401 | 2012-03-08 22:41:52 -0800 | [diff] [blame] | 1416 | dev_dbg(&ihost->pdev->dev, |
| 1417 | "%s: isci_device = %p, waiting done.\n", __func__, idev); |
| 1418 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1419 | return status; |
| 1420 | } |
| 1421 | |
| 1422 | /** |
| 1423 | * isci_remote_device_gone() - This function is called by libsas when a domain |
| 1424 | * device is removed. |
| 1425 | * @domain_device: This parameter specifies the libsas domain device. |
| 1426 | * |
| 1427 | */ |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1428 | void isci_remote_device_gone(struct domain_device *dev) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1429 | { |
Dan Williams | 4393aa4 | 2011-03-31 13:10:44 -0700 | [diff] [blame] | 1430 | struct isci_host *ihost = dev_to_ihost(dev); |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1431 | struct isci_remote_device *idev = dev->lldd_dev; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1432 | |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1433 | dev_dbg(&ihost->pdev->dev, |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1434 | "%s: domain_device = %p, isci_device = %p, isci_port = %p\n", |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1435 | __func__, dev, idev, idev->isci_port); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1436 | |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1437 | isci_remote_device_stop(ihost, idev); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1438 | } |
| 1439 | |
| 1440 | |
| 1441 | /** |
| 1442 | * isci_remote_device_found() - This function is called by libsas when a remote |
| 1443 | * device is discovered. A remote device object is created and started. the |
| 1444 | * function then sleeps until the sci core device started message is |
| 1445 | * received. |
| 1446 | * @domain_device: This parameter specifies the libsas domain device. |
| 1447 | * |
| 1448 | * status, zero indicates success. |
| 1449 | */ |
Dan Williams | c132f69 | 2012-01-03 23:26:08 -0800 | [diff] [blame] | 1450 | int isci_remote_device_found(struct domain_device *dev) |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1451 | { |
Dan Williams | c132f69 | 2012-01-03 23:26:08 -0800 | [diff] [blame] | 1452 | struct isci_host *isci_host = dev_to_ihost(dev); |
| 1453 | struct isci_port *isci_port = dev->port->lldd_port; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1454 | struct isci_remote_device *isci_device; |
| 1455 | enum sci_status status; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1456 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1457 | dev_dbg(&isci_host->pdev->dev, |
Dan Williams | c132f69 | 2012-01-03 23:26:08 -0800 | [diff] [blame] | 1458 | "%s: domain_device = %p\n", __func__, dev); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1459 | |
Dan Williams | c132f69 | 2012-01-03 23:26:08 -0800 | [diff] [blame] | 1460 | if (!isci_port) |
| 1461 | return -ENODEV; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1462 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1463 | isci_device = isci_remote_device_alloc(isci_host, isci_port); |
Dan Williams | d9c3739 | 2011-03-03 17:59:32 -0800 | [diff] [blame] | 1464 | if (!isci_device) |
| 1465 | return -ENODEV; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1466 | |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1467 | kref_init(&isci_device->kref); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1468 | INIT_LIST_HEAD(&isci_device->node); |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1469 | |
| 1470 | spin_lock_irq(&isci_host->scic_lock); |
Dan Williams | c132f69 | 2012-01-03 23:26:08 -0800 | [diff] [blame] | 1471 | isci_device->domain_dev = dev; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1472 | isci_device->isci_port = isci_port; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1473 | list_add_tail(&isci_device->node, &isci_port->remote_dev_list); |
| 1474 | |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1475 | set_bit(IDEV_START_PENDING, &isci_device->flags); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1476 | status = isci_remote_device_construct(isci_port, isci_device); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1477 | |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1478 | dev_dbg(&isci_host->pdev->dev, |
| 1479 | "%s: isci_device = %p\n", |
| 1480 | __func__, isci_device); |
| 1481 | |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1482 | if (status == SCI_SUCCESS) { |
| 1483 | /* device came up, advertise it to the world */ |
Dan Williams | c132f69 | 2012-01-03 23:26:08 -0800 | [diff] [blame] | 1484 | dev->lldd_dev = isci_device; |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1485 | } else |
| 1486 | isci_put_device(isci_device); |
| 1487 | spin_unlock_irq(&isci_host->scic_lock); |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1488 | |
Dan Williams | 6ad31fe | 2011-03-04 12:10:29 -0800 | [diff] [blame] | 1489 | /* wait for the device ready callback. */ |
| 1490 | wait_for_device_start(isci_host, isci_device); |
| 1491 | |
Dan Williams | 209fae1 | 2011-06-13 17:39:44 -0700 | [diff] [blame] | 1492 | return status == SCI_SUCCESS ? 0 : -ENODEV; |
Dan Williams | 6f231dd | 2011-07-02 22:56:22 -0700 | [diff] [blame] | 1493 | } |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1494 | |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 1495 | enum sci_status isci_remote_device_suspend_terminate( |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 1496 | struct isci_host *ihost, |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 1497 | struct isci_remote_device *idev, |
| 1498 | struct isci_request *ireq) |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1499 | { |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1500 | unsigned long flags; |
| 1501 | enum sci_status status; |
| 1502 | |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 1503 | /* Put the device into suspension. */ |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1504 | spin_lock_irqsave(&ihost->scic_lock, flags); |
Jeff Skirvin | 0c3ce38 | 2012-03-08 22:42:02 -0800 | [diff] [blame^] | 1505 | set_bit(IDEV_ABORT_PATH_ACTIVE, &idev->flags); |
Jeff Skirvin | c94fc1a | 2012-03-08 22:41:58 -0800 | [diff] [blame] | 1506 | sci_remote_device_suspend(idev, SCI_SW_SUSPEND_LINKHANG_DETECT); |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1507 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 1508 | |
| 1509 | /* Terminate and wait for the completions. */ |
| 1510 | status = isci_remote_device_terminate_requests(ihost, idev, ireq); |
| 1511 | if (status != SCI_SUCCESS) |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1512 | dev_dbg(&ihost->pdev->dev, |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 1513 | "%s: isci_remote_device_terminate_requests(%p) " |
| 1514 | "returned %d!\n", |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1515 | __func__, idev, status); |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 1516 | |
| 1517 | /* NOTE: RNC resumption is left to the caller! */ |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1518 | return status; |
| 1519 | } |
| 1520 | |
| 1521 | int isci_remote_device_is_safe_to_abort( |
| 1522 | struct isci_remote_device *idev) |
| 1523 | { |
| 1524 | return sci_remote_node_context_is_safe_to_abort(&idev->rnc); |
| 1525 | } |
| 1526 | |
| 1527 | enum sci_status sci_remote_device_abort_requests_pending_abort( |
| 1528 | struct isci_remote_device *idev) |
| 1529 | { |
Jeff Skirvin | 14aaa9f | 2012-03-08 22:41:54 -0800 | [diff] [blame] | 1530 | return sci_remote_device_terminate_reqs_checkabort(idev, 1); |
Jeff Skirvin | 726980d | 2012-03-08 22:41:50 -0800 | [diff] [blame] | 1531 | } |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 1532 | |
| 1533 | enum sci_status isci_remote_device_reset_complete( |
| 1534 | struct isci_host *ihost, |
| 1535 | struct isci_remote_device *idev) |
| 1536 | { |
| 1537 | unsigned long flags; |
| 1538 | enum sci_status status; |
| 1539 | |
| 1540 | spin_lock_irqsave(&ihost->scic_lock, flags); |
| 1541 | status = sci_remote_device_reset_complete(idev); |
Jeff Skirvin | 5b6bf22 | 2012-03-08 22:41:51 -0800 | [diff] [blame] | 1542 | spin_unlock_irqrestore(&ihost->scic_lock, flags); |
| 1543 | |
| 1544 | return status; |
| 1545 | } |
| 1546 | |
Jeff Skirvin | 9608b64 | 2012-03-08 22:42:00 -0800 | [diff] [blame] | 1547 | void isci_dev_set_hang_detection_timeout( |
| 1548 | struct isci_remote_device *idev, |
| 1549 | u32 timeout) |
| 1550 | { |
| 1551 | if (dev_is_sata(idev->domain_dev)) { |
| 1552 | if (timeout) { |
| 1553 | if (test_and_set_bit(IDEV_RNC_LLHANG_ENABLED, |
| 1554 | &idev->flags)) |
| 1555 | return; /* Already enabled. */ |
| 1556 | } else if (!test_and_clear_bit(IDEV_RNC_LLHANG_ENABLED, |
| 1557 | &idev->flags)) |
| 1558 | return; /* Not enabled. */ |
| 1559 | |
| 1560 | sci_port_set_hang_detection_timeout(idev->owning_port, |
| 1561 | timeout); |
| 1562 | } |
| 1563 | } |