Channagoud Kadabi | 075db3b | 2017-03-16 14:26:17 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved. |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | #include <linux/err.h> |
| 13 | #include <linux/ipc_logging.h> |
| 14 | #include <linux/list.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/notifier.h> |
| 17 | #include <linux/of.h> |
| 18 | #include <linux/platform_device.h> |
| 19 | #include <linux/sched.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/suspend.h> |
| 22 | #include <linux/random.h> |
| 23 | #include <soc/qcom/glink.h> |
| 24 | #include <soc/qcom/subsystem_notif.h> |
| 25 | #include <soc/qcom/subsystem_restart.h> |
| 26 | #include "glink_private.h" |
| 27 | |
| 28 | #define GLINK_SSR_REPLY_TIMEOUT HZ |
| 29 | #define GLINK_SSR_INTENT_REQ_TIMEOUT_MS 500 |
| 30 | #define GLINK_SSR_EVENT_INIT ~0 |
| 31 | #define NUM_LOG_PAGES 3 |
| 32 | |
| 33 | #define GLINK_SSR_LOG(x...) do { \ |
| 34 | if (glink_ssr_log_ctx) \ |
| 35 | ipc_log_string(glink_ssr_log_ctx, x); \ |
| 36 | } while (0) |
| 37 | |
| 38 | #define GLINK_SSR_ERR(x...) do { \ |
| 39 | pr_err(x); \ |
| 40 | GLINK_SSR_LOG(x); \ |
| 41 | } while (0) |
| 42 | |
| 43 | static void *glink_ssr_log_ctx; |
| 44 | |
| 45 | /* Global restart counter */ |
| 46 | static uint32_t sequence_number; |
| 47 | |
| 48 | /* Flag indicating if responses were received for all SSR notifications */ |
| 49 | static bool notifications_successful; |
| 50 | |
| 51 | /* Completion for setting notifications_successful */ |
| 52 | struct completion notifications_successful_complete; |
| 53 | |
| 54 | /** |
| 55 | * struct restart_notifier_block - restart notifier wrapper structure |
| 56 | * subsystem: the name of the subsystem as recognized by the SSR framework |
| 57 | * nb: notifier block structure used by the SSR framework |
| 58 | */ |
| 59 | struct restart_notifier_block { |
| 60 | const char *subsystem; |
| 61 | struct notifier_block nb; |
| 62 | }; |
| 63 | |
| 64 | /** |
| 65 | * struct configure_and_open_ch_work - Work structure for used for opening |
| 66 | * glink_ssr channels |
| 67 | * edge: The G-Link edge obtained from the link state callback |
| 68 | * transport: The G-Link transport obtained from the link state callback |
| 69 | * link_state: The link state obtained from the link state callback |
| 70 | * ss_info: Subsystem information structure containing the info for this |
| 71 | * callback |
| 72 | * work: Work structure |
| 73 | */ |
| 74 | struct configure_and_open_ch_work { |
| 75 | char edge[GLINK_NAME_SIZE]; |
| 76 | char transport[GLINK_NAME_SIZE]; |
| 77 | enum glink_link_state link_state; |
| 78 | struct subsys_info *ss_info; |
| 79 | struct work_struct work; |
| 80 | }; |
| 81 | |
| 82 | /** |
Dhoat Harpal | ecf7b27 | 2016-12-20 18:22:57 +0530 | [diff] [blame] | 83 | * struct rx_done_ch_work - Work structure used for sending rx_done on |
| 84 | * glink_ssr channels |
| 85 | * handle: G-Link channel handle to be used for sending rx_done |
| 86 | * ptr: Intent pointer data provided in notify rx function |
| 87 | * work: Work structure |
| 88 | */ |
| 89 | struct rx_done_ch_work { |
| 90 | void *handle; |
| 91 | const void *ptr; |
| 92 | struct work_struct work; |
| 93 | }; |
| 94 | |
| 95 | /** |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 96 | * struct close_ch_work - Work structure for used for closing glink_ssr channels |
| 97 | * edge: The G-Link edge name for the channel being closed |
| 98 | * handle: G-Link channel handle to be closed |
| 99 | * work: Work structure |
| 100 | */ |
| 101 | struct close_ch_work { |
| 102 | char edge[GLINK_NAME_SIZE]; |
| 103 | void *handle; |
| 104 | struct work_struct work; |
| 105 | }; |
| 106 | |
| 107 | static int glink_ssr_restart_notifier_cb(struct notifier_block *this, |
| 108 | unsigned long code, |
| 109 | void *data); |
| 110 | static void delete_ss_info_notify_list(struct subsys_info *ss_info); |
| 111 | static int configure_and_open_channel(struct subsys_info *ss_info); |
| 112 | static struct workqueue_struct *glink_ssr_wq; |
| 113 | |
| 114 | static LIST_HEAD(subsystem_list); |
| 115 | static atomic_t responses_remaining = ATOMIC_INIT(0); |
| 116 | static wait_queue_head_t waitqueue; |
| 117 | |
Dhoat Harpal | ecf7b27 | 2016-12-20 18:22:57 +0530 | [diff] [blame] | 118 | static void rx_done_cb_worker(struct work_struct *work) |
| 119 | { |
| 120 | struct rx_done_ch_work *rx_done_work = |
| 121 | container_of(work, struct rx_done_ch_work, work); |
| 122 | |
| 123 | glink_rx_done(rx_done_work->handle, rx_done_work->ptr, false); |
| 124 | kfree(rx_done_work); |
| 125 | } |
| 126 | |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 127 | static void link_state_cb_worker(struct work_struct *work) |
| 128 | { |
| 129 | unsigned long flags; |
| 130 | struct configure_and_open_ch_work *ch_open_work = |
| 131 | container_of(work, struct configure_and_open_ch_work, work); |
| 132 | struct subsys_info *ss_info = ch_open_work->ss_info; |
| 133 | |
| 134 | GLINK_SSR_LOG("<SSR> %s: LINK STATE[%d] %s:%s\n", __func__, |
| 135 | ch_open_work->link_state, ch_open_work->edge, |
| 136 | ch_open_work->transport); |
| 137 | |
| 138 | if (ss_info && ch_open_work->link_state == GLINK_LINK_STATE_UP) { |
| 139 | spin_lock_irqsave(&ss_info->link_up_lock, flags); |
| 140 | if (!ss_info->link_up) { |
| 141 | ss_info->link_up = true; |
| 142 | spin_unlock_irqrestore(&ss_info->link_up_lock, flags); |
| 143 | if (!configure_and_open_channel(ss_info)) { |
| 144 | glink_unregister_link_state_cb( |
| 145 | ss_info->link_state_handle); |
| 146 | ss_info->link_state_handle = NULL; |
| 147 | } |
| 148 | kfree(ch_open_work); |
| 149 | return; |
| 150 | } |
| 151 | spin_unlock_irqrestore(&ss_info->link_up_lock, flags); |
| 152 | } else { |
| 153 | if (ss_info) { |
| 154 | spin_lock_irqsave(&ss_info->link_up_lock, flags); |
| 155 | ss_info->link_up = false; |
| 156 | spin_unlock_irqrestore(&ss_info->link_up_lock, flags); |
| 157 | ss_info->handle = NULL; |
| 158 | } else { |
| 159 | GLINK_SSR_ERR("<SSR> %s: ss_info is NULL\n", __func__); |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | kfree(ch_open_work); |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * glink_lbsrv_link_state_cb() - Callback to receive link state updates |
| 168 | * @cb_info: Information containing link & its state. |
| 169 | * @priv: Private data passed during the link state registration. |
| 170 | * |
| 171 | * This function is called by the G-Link core to notify the glink_ssr module |
| 172 | * regarding the link state updates. This function is registered with the |
| 173 | * G-Link core by the loopback server during glink_register_link_state_cb(). |
| 174 | */ |
| 175 | static void glink_ssr_link_state_cb(struct glink_link_state_cb_info *cb_info, |
| 176 | void *priv) |
| 177 | { |
| 178 | struct subsys_info *ss_info; |
| 179 | struct configure_and_open_ch_work *open_ch_work; |
| 180 | |
| 181 | if (!cb_info) { |
| 182 | GLINK_SSR_ERR("<SSR> %s: Missing cb_data\n", __func__); |
| 183 | return; |
| 184 | } |
| 185 | |
| 186 | ss_info = get_info_for_edge(cb_info->edge); |
| 187 | |
| 188 | open_ch_work = kmalloc(sizeof(*open_ch_work), GFP_KERNEL); |
| 189 | if (!open_ch_work) { |
| 190 | GLINK_SSR_ERR("<SSR> %s: Could not allocate open_ch_work\n", |
| 191 | __func__); |
| 192 | return; |
| 193 | } |
| 194 | |
| 195 | strlcpy(open_ch_work->edge, cb_info->edge, GLINK_NAME_SIZE); |
| 196 | strlcpy(open_ch_work->transport, cb_info->transport, GLINK_NAME_SIZE); |
| 197 | open_ch_work->link_state = cb_info->link_state; |
| 198 | open_ch_work->ss_info = ss_info; |
| 199 | |
| 200 | INIT_WORK(&open_ch_work->work, link_state_cb_worker); |
| 201 | queue_work(glink_ssr_wq, &open_ch_work->work); |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * glink_ssr_notify_rx() - RX Notification callback |
| 206 | * @handle: G-Link channel handle |
| 207 | * @priv: Private callback data |
| 208 | * @pkt_priv: Private packet data |
| 209 | * @ptr: Pointer to the data received |
| 210 | * @size: Size of the data received |
| 211 | * |
| 212 | * This function is a notification callback from the G-Link core that data |
| 213 | * has been received from the remote side. This data is validate to make |
| 214 | * sure it is a cleanup_done message and is processed accordingly if it is. |
| 215 | */ |
| 216 | void glink_ssr_notify_rx(void *handle, const void *priv, const void *pkt_priv, |
| 217 | const void *ptr, size_t size) |
| 218 | { |
| 219 | struct ssr_notify_data *cb_data = (struct ssr_notify_data *)priv; |
| 220 | struct cleanup_done_msg *resp = (struct cleanup_done_msg *)ptr; |
Dhoat Harpal | ecf7b27 | 2016-12-20 18:22:57 +0530 | [diff] [blame] | 221 | struct rx_done_ch_work *rx_done_work; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 222 | |
Dhoat Harpal | ecf7b27 | 2016-12-20 18:22:57 +0530 | [diff] [blame] | 223 | rx_done_work = kmalloc(sizeof(*rx_done_work), GFP_ATOMIC); |
| 224 | if (!rx_done_work) { |
| 225 | GLINK_SSR_ERR("<SSR> %s: Could not allocate rx_done_work\n", |
| 226 | __func__); |
| 227 | return; |
| 228 | } |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 229 | if (unlikely(!cb_data)) |
| 230 | goto missing_cb_data; |
| 231 | if (unlikely(!cb_data->do_cleanup_data)) |
| 232 | goto missing_do_cleanup_data; |
| 233 | if (unlikely(!resp)) |
| 234 | goto missing_response; |
| 235 | if (unlikely(resp->version != cb_data->do_cleanup_data->version)) |
| 236 | goto version_mismatch; |
| 237 | if (unlikely(resp->seq_num != cb_data->do_cleanup_data->seq_num)) |
| 238 | goto invalid_seq_number; |
| 239 | if (unlikely(resp->response != GLINK_SSR_CLEANUP_DONE)) |
| 240 | goto wrong_response; |
| 241 | |
| 242 | cb_data->responded = true; |
| 243 | atomic_dec(&responses_remaining); |
| 244 | |
| 245 | GLINK_SSR_LOG( |
| 246 | "<SSR> %s: Response from %s resp[%d] version[%d] seq_num[%d] restarted[%s]\n", |
| 247 | __func__, cb_data->edge, resp->response, |
| 248 | resp->version, resp->seq_num, |
| 249 | cb_data->do_cleanup_data->name); |
| 250 | |
| 251 | kfree(cb_data->do_cleanup_data); |
| 252 | cb_data->do_cleanup_data = NULL; |
Dhoat Harpal | ecf7b27 | 2016-12-20 18:22:57 +0530 | [diff] [blame] | 253 | rx_done_work->ptr = ptr; |
| 254 | rx_done_work->handle = handle; |
| 255 | INIT_WORK(&rx_done_work->work, rx_done_cb_worker); |
| 256 | queue_work(glink_ssr_wq, &rx_done_work->work); |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 257 | wake_up(&waitqueue); |
| 258 | return; |
| 259 | |
| 260 | missing_cb_data: |
| 261 | panic("%s: Missing cb_data!\n", __func__); |
| 262 | return; |
| 263 | missing_do_cleanup_data: |
| 264 | panic("%s: Missing do_cleanup data!\n", __func__); |
| 265 | return; |
| 266 | missing_response: |
| 267 | GLINK_SSR_ERR("<SSR> %s: Missing response data\n", __func__); |
| 268 | return; |
| 269 | version_mismatch: |
| 270 | GLINK_SSR_ERR("<SSR> %s: Version mismatch. %s[%d], %s[%d]\n", __func__, |
| 271 | "do_cleanup version", cb_data->do_cleanup_data->version, |
| 272 | "cleanup_done version", resp->version); |
| 273 | return; |
| 274 | invalid_seq_number: |
| 275 | GLINK_SSR_ERR("<SSR> %s: Invalid seq. number. %s[%d], %s[%d]\n", |
| 276 | __func__, "do_cleanup seq num", |
| 277 | cb_data->do_cleanup_data->seq_num, |
| 278 | "cleanup_done seq_num", resp->seq_num); |
| 279 | return; |
| 280 | wrong_response: |
| 281 | GLINK_SSR_ERR("<SSR> %s: Not a cleaup_done message. %s[%d]\n", __func__, |
| 282 | "cleanup_done response", resp->response); |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * glink_ssr_notify_tx_done() - Transmit finished notification callback |
| 287 | * @handle: G-Link channel handle |
| 288 | * @priv: Private callback data |
| 289 | * @pkt_priv: Private packet data |
| 290 | * @ptr: Pointer to the data received |
| 291 | * |
| 292 | * This function is a notification callback from the G-Link core that data |
| 293 | * we sent has finished transmitting. |
| 294 | */ |
| 295 | void glink_ssr_notify_tx_done(void *handle, const void *priv, |
| 296 | const void *pkt_priv, const void *ptr) |
| 297 | { |
| 298 | struct ssr_notify_data *cb_data = (struct ssr_notify_data *)priv; |
| 299 | |
| 300 | if (unlikely(!cb_data)) { |
| 301 | panic("%s: cb_data is NULL!\n", __func__); |
| 302 | return; |
| 303 | } |
| 304 | |
| 305 | GLINK_SSR_LOG("<SSR> %s: Notified %s of restart\n", |
| 306 | __func__, cb_data->edge); |
| 307 | |
| 308 | cb_data->tx_done = true; |
| 309 | } |
| 310 | |
| 311 | void close_ch_worker(struct work_struct *work) |
| 312 | { |
| 313 | unsigned long flags; |
| 314 | void *link_state_handle; |
| 315 | struct subsys_info *ss_info; |
| 316 | struct close_ch_work *close_work = |
| 317 | container_of(work, struct close_ch_work, work); |
| 318 | |
| 319 | glink_close(close_work->handle); |
| 320 | |
| 321 | ss_info = get_info_for_edge(close_work->edge); |
| 322 | if (WARN_ON(!ss_info)) |
| 323 | return; |
| 324 | |
| 325 | spin_lock_irqsave(&ss_info->link_up_lock, flags); |
| 326 | ss_info->link_up = false; |
| 327 | spin_unlock_irqrestore(&ss_info->link_up_lock, flags); |
| 328 | |
| 329 | if (WARN_ON(ss_info->link_state_handle != NULL)) |
| 330 | return; |
| 331 | link_state_handle = glink_register_link_state_cb(ss_info->link_info, |
| 332 | NULL); |
| 333 | |
| 334 | if (IS_ERR_OR_NULL(link_state_handle)) |
| 335 | GLINK_SSR_ERR("<SSR> %s: %s, ret[%d]\n", __func__, |
| 336 | "Couldn't register link state cb", |
| 337 | (int)PTR_ERR(link_state_handle)); |
| 338 | else |
| 339 | ss_info->link_state_handle = link_state_handle; |
| 340 | |
| 341 | if (WARN_ON(!ss_info->cb_data)) |
| 342 | return; |
| 343 | kfree(ss_info->cb_data); |
Dhoat Harpal | 1278230 | 2017-02-01 20:16:21 +0530 | [diff] [blame] | 344 | ss_info->cb_data = NULL; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 345 | kfree(close_work); |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * glink_ssr_notify_state() - Channel state notification callback |
| 350 | * @handle: G-Link channel handle |
| 351 | * @priv: Private callback data |
| 352 | * @event: The state that has been transitioned to |
| 353 | * |
| 354 | * This function is a notification callback from the G-Link core that the |
| 355 | * channel state has changed. |
| 356 | */ |
| 357 | void glink_ssr_notify_state(void *handle, const void *priv, unsigned int event) |
| 358 | { |
| 359 | struct ssr_notify_data *cb_data = (struct ssr_notify_data *)priv; |
| 360 | struct close_ch_work *close_work; |
| 361 | |
| 362 | if (!cb_data) { |
| 363 | GLINK_SSR_ERR("<SSR> %s: Could not allocate data for cb_data\n", |
| 364 | __func__); |
| 365 | } else { |
| 366 | GLINK_SSR_LOG("<SSR> %s: event[%d]\n", |
| 367 | __func__, event); |
| 368 | cb_data->event = event; |
| 369 | if (event == GLINK_REMOTE_DISCONNECTED) { |
| 370 | close_work = |
| 371 | kmalloc(sizeof(struct close_ch_work), |
| 372 | GFP_KERNEL); |
| 373 | if (!close_work) { |
| 374 | GLINK_SSR_ERR( |
| 375 | "<SSR> %s: Could not allocate %s\n", |
| 376 | __func__, "close work"); |
| 377 | return; |
| 378 | } |
| 379 | |
| 380 | strlcpy(close_work->edge, cb_data->edge, |
| 381 | sizeof(close_work->edge)); |
| 382 | close_work->handle = handle; |
| 383 | INIT_WORK(&close_work->work, close_ch_worker); |
| 384 | queue_work(glink_ssr_wq, &close_work->work); |
| 385 | } |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * glink_ssr_notify_rx_intent_req() - RX intent request notification callback |
| 391 | * @handle: G-Link channel handle |
| 392 | * @priv: Private callback data |
| 393 | * @req_size: The size of the requested intent |
| 394 | * |
| 395 | * This function is a notification callback from the G-Link core of the remote |
| 396 | * side's request for an RX intent to be queued. |
| 397 | * |
| 398 | * Return: Boolean indicating whether or not the request was successfully |
| 399 | * received |
| 400 | */ |
| 401 | bool glink_ssr_notify_rx_intent_req(void *handle, const void *priv, |
| 402 | size_t req_size) |
| 403 | { |
| 404 | struct ssr_notify_data *cb_data = (struct ssr_notify_data *)priv; |
| 405 | |
| 406 | if (!cb_data) { |
| 407 | GLINK_SSR_ERR("<SSR> %s: Could not allocate data for cb_data\n", |
| 408 | __func__); |
| 409 | return false; |
| 410 | } |
| 411 | GLINK_SSR_LOG("<SSR> %s: rx_intent_req of size %zu\n", |
| 412 | __func__, req_size); |
| 413 | return true; |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * glink_ssr_restart_notifier_cb() - SSR restart notifier callback function |
| 418 | * @this: Notifier block used by the SSR framework |
| 419 | * @code: The SSR code for which stage of restart is occurring |
| 420 | * @data: Structure containing private data - not used here. |
| 421 | * |
| 422 | * This function is a callback for the SSR framework. From here we initiate |
| 423 | * our handling of SSR. |
| 424 | * |
| 425 | * Return: Status of SSR handling |
| 426 | */ |
| 427 | static int glink_ssr_restart_notifier_cb(struct notifier_block *this, |
| 428 | unsigned long code, |
| 429 | void *data) |
| 430 | { |
| 431 | int ret = 0; |
| 432 | struct subsys_info *ss_info = NULL; |
| 433 | struct restart_notifier_block *notifier = |
| 434 | container_of(this, struct restart_notifier_block, nb); |
| 435 | |
| 436 | if (code == SUBSYS_AFTER_SHUTDOWN) { |
| 437 | GLINK_SSR_LOG("<SSR> %s: %s: subsystem restart for %s\n", |
| 438 | __func__, "SUBSYS_AFTER_SHUTDOWN", |
| 439 | notifier->subsystem); |
| 440 | ss_info = get_info_for_subsystem(notifier->subsystem); |
| 441 | if (ss_info == NULL) { |
| 442 | GLINK_SSR_ERR("<SSR> %s: ss_info is NULL\n", __func__); |
| 443 | return -EINVAL; |
| 444 | } |
| 445 | |
| 446 | glink_ssr(ss_info->edge); |
| 447 | ret = notify_for_subsystem(ss_info); |
| 448 | |
| 449 | if (ret) { |
| 450 | GLINK_SSR_ERR("<SSR>: %s: %s, ret[%d]\n", __func__, |
| 451 | "Subsystem notification failed", ret); |
| 452 | return ret; |
| 453 | } |
| 454 | } |
| 455 | return NOTIFY_DONE; |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * notify for subsystem() - Notify other subsystems that a subsystem is being |
| 460 | * restarted |
| 461 | * @ss_info: Subsystem info structure for the subsystem being restarted |
| 462 | * |
| 463 | * This function sends notifications to affected subsystems that the subsystem |
| 464 | * in ss_info is being restarted, and waits for the cleanup done response from |
| 465 | * all of those subsystems. It also initiates any local cleanup that is |
| 466 | * necessary. |
| 467 | * |
| 468 | * Return: 0 on success, standard error codes otherwise |
| 469 | */ |
| 470 | int notify_for_subsystem(struct subsys_info *ss_info) |
| 471 | { |
| 472 | struct subsys_info *ss_info_channel; |
| 473 | struct subsys_info_leaf *ss_leaf_entry; |
| 474 | struct do_cleanup_msg *do_cleanup_data; |
| 475 | void *handle; |
| 476 | int wait_ret; |
| 477 | int ret; |
| 478 | unsigned long flags; |
| 479 | |
| 480 | if (!ss_info) { |
| 481 | GLINK_SSR_ERR("<SSR> %s: ss_info structure invalid\n", |
| 482 | __func__); |
| 483 | return -EINVAL; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * No locking is needed here because ss_info->notify_list_len is |
| 488 | * only modified during setup. |
| 489 | */ |
| 490 | atomic_set(&responses_remaining, ss_info->notify_list_len); |
| 491 | init_waitqueue_head(&waitqueue); |
| 492 | notifications_successful = true; |
| 493 | |
| 494 | list_for_each_entry(ss_leaf_entry, &ss_info->notify_list, |
| 495 | notify_list_node) { |
| 496 | GLINK_SSR_LOG( |
| 497 | "<SSR> %s: Notifying: %s:%s of %s restart, seq_num[%d]\n", |
| 498 | __func__, ss_leaf_entry->edge, |
| 499 | ss_leaf_entry->xprt, ss_info->edge, |
| 500 | sequence_number); |
| 501 | |
| 502 | ss_info_channel = |
| 503 | get_info_for_subsystem(ss_leaf_entry->ssr_name); |
| 504 | if (ss_info_channel == NULL) { |
| 505 | GLINK_SSR_ERR( |
| 506 | "<SSR> %s: unable to find subsystem name\n", |
| 507 | __func__); |
| 508 | return -ENODEV; |
| 509 | } |
| 510 | handle = ss_info_channel->handle; |
| 511 | ss_leaf_entry->cb_data = ss_info_channel->cb_data; |
| 512 | |
| 513 | spin_lock_irqsave(&ss_info->link_up_lock, flags); |
| 514 | if (IS_ERR_OR_NULL(ss_info_channel->handle) || |
| 515 | !ss_info_channel->cb_data || |
| 516 | !ss_info_channel->link_up || |
| 517 | ss_info_channel->cb_data->event |
| 518 | != GLINK_CONNECTED) { |
| 519 | |
| 520 | GLINK_SSR_LOG( |
| 521 | "<SSR> %s: %s:%s %s[%d], %s[%p], %s[%d]\n", |
| 522 | __func__, ss_leaf_entry->edge, "Not connected", |
| 523 | "resp. remaining", |
| 524 | atomic_read(&responses_remaining), "handle", |
| 525 | ss_info_channel->handle, "link_up", |
| 526 | ss_info_channel->link_up); |
| 527 | |
| 528 | spin_unlock_irqrestore(&ss_info->link_up_lock, flags); |
| 529 | atomic_dec(&responses_remaining); |
| 530 | continue; |
| 531 | } |
| 532 | spin_unlock_irqrestore(&ss_info->link_up_lock, flags); |
| 533 | |
| 534 | do_cleanup_data = kmalloc(sizeof(struct do_cleanup_msg), |
| 535 | GFP_KERNEL); |
| 536 | if (!do_cleanup_data) { |
| 537 | GLINK_SSR_ERR( |
| 538 | "%s %s: Could not allocate do_cleanup_msg\n", |
| 539 | "<SSR>", __func__); |
| 540 | return -ENOMEM; |
| 541 | } |
| 542 | |
| 543 | do_cleanup_data->version = 0; |
| 544 | do_cleanup_data->command = GLINK_SSR_DO_CLEANUP; |
| 545 | do_cleanup_data->seq_num = sequence_number; |
| 546 | do_cleanup_data->name_len = strlen(ss_info->edge); |
| 547 | strlcpy(do_cleanup_data->name, ss_info->edge, |
| 548 | do_cleanup_data->name_len + 1); |
| 549 | ss_leaf_entry->cb_data->do_cleanup_data = do_cleanup_data; |
| 550 | |
| 551 | ret = glink_queue_rx_intent(handle, |
| 552 | (void *)ss_leaf_entry->cb_data, |
| 553 | sizeof(struct cleanup_done_msg)); |
| 554 | if (ret) { |
| 555 | GLINK_SSR_ERR( |
| 556 | "%s %s: %s, ret[%d], resp. remaining[%d]\n", |
| 557 | "<SSR>", __func__, |
| 558 | "queue_rx_intent failed", ret, |
| 559 | atomic_read(&responses_remaining)); |
| 560 | kfree(do_cleanup_data); |
| 561 | ss_leaf_entry->cb_data->do_cleanup_data = NULL; |
| 562 | |
| 563 | if (strcmp(ss_leaf_entry->ssr_name, "rpm")) { |
| 564 | subsystem_restart(ss_leaf_entry->ssr_name); |
| 565 | ss_leaf_entry->restarted = true; |
| 566 | } else { |
| 567 | panic("%s: Could not queue intent for RPM!\n", |
| 568 | __func__); |
| 569 | } |
| 570 | atomic_dec(&responses_remaining); |
| 571 | continue; |
| 572 | } |
| 573 | |
| 574 | if (strcmp(ss_leaf_entry->ssr_name, "rpm")) |
| 575 | ret = glink_tx(handle, ss_leaf_entry->cb_data, |
| 576 | do_cleanup_data, |
| 577 | sizeof(*do_cleanup_data), |
| 578 | GLINK_TX_REQ_INTENT); |
| 579 | else |
| 580 | ret = glink_tx(handle, ss_leaf_entry->cb_data, |
| 581 | do_cleanup_data, |
| 582 | sizeof(*do_cleanup_data), |
| 583 | GLINK_TX_SINGLE_THREADED); |
| 584 | |
| 585 | if (ret) { |
| 586 | GLINK_SSR_ERR("<SSR> %s: tx failed, ret[%d], %s[%d]\n", |
| 587 | __func__, ret, "resp. remaining", |
| 588 | atomic_read(&responses_remaining)); |
| 589 | kfree(do_cleanup_data); |
| 590 | ss_leaf_entry->cb_data->do_cleanup_data = NULL; |
| 591 | |
| 592 | if (strcmp(ss_leaf_entry->ssr_name, "rpm")) { |
| 593 | subsystem_restart(ss_leaf_entry->ssr_name); |
| 594 | ss_leaf_entry->restarted = true; |
| 595 | } else { |
| 596 | panic("%s: glink_tx() to RPM failed!\n", |
| 597 | __func__); |
| 598 | } |
| 599 | atomic_dec(&responses_remaining); |
| 600 | continue; |
| 601 | } |
| 602 | |
| 603 | sequence_number++; |
| 604 | } |
| 605 | |
| 606 | wait_ret = wait_event_timeout(waitqueue, |
| 607 | atomic_read(&responses_remaining) == 0, |
| 608 | GLINK_SSR_REPLY_TIMEOUT); |
| 609 | |
| 610 | list_for_each_entry(ss_leaf_entry, &ss_info->notify_list, |
| 611 | notify_list_node) { |
| 612 | if (!wait_ret && !IS_ERR_OR_NULL(ss_leaf_entry->cb_data) |
| 613 | && !ss_leaf_entry->cb_data->responded) { |
| 614 | GLINK_SSR_ERR("%s %s: Subsystem %s %s\n", |
| 615 | "<SSR>", __func__, ss_leaf_entry->edge, |
| 616 | "failed to respond. Restarting."); |
| 617 | |
| 618 | notifications_successful = false; |
| 619 | |
| 620 | /* Check for RPM, as it can't be restarted */ |
| 621 | if (!strcmp(ss_leaf_entry->ssr_name, "rpm")) |
| 622 | panic("%s: RPM failed to respond!\n", __func__); |
| 623 | else if (!ss_leaf_entry->restarted) |
| 624 | subsystem_restart(ss_leaf_entry->ssr_name); |
| 625 | } |
| 626 | ss_leaf_entry->restarted = false; |
| 627 | |
| 628 | if (!IS_ERR_OR_NULL(ss_leaf_entry->cb_data)) |
| 629 | ss_leaf_entry->cb_data->responded = false; |
| 630 | } |
| 631 | complete(¬ifications_successful_complete); |
| 632 | return 0; |
| 633 | } |
| 634 | EXPORT_SYMBOL(notify_for_subsystem); |
| 635 | |
| 636 | /** |
| 637 | * configure_and_open_channel() - configure and open a G-Link channel for |
| 638 | * the given subsystem |
| 639 | * @ss_info: The subsys_info structure where the channel will be stored |
| 640 | * |
| 641 | * Return: 0 on success, standard error codes otherwise |
| 642 | */ |
| 643 | static int configure_and_open_channel(struct subsys_info *ss_info) |
| 644 | { |
| 645 | struct glink_open_config open_cfg; |
| 646 | struct ssr_notify_data *cb_data = NULL; |
| 647 | void *handle = NULL; |
| 648 | |
| 649 | if (!ss_info) { |
| 650 | GLINK_SSR_ERR("<SSR> %s: ss_info structure invalid\n", |
| 651 | __func__); |
| 652 | return -EINVAL; |
| 653 | } |
| 654 | |
| 655 | cb_data = kmalloc(sizeof(struct ssr_notify_data), GFP_KERNEL); |
| 656 | if (!cb_data) { |
| 657 | GLINK_SSR_ERR("<SSR> %s: Could not allocate cb_data\n", |
| 658 | __func__); |
| 659 | return -ENOMEM; |
| 660 | } |
| 661 | cb_data->responded = false; |
| 662 | cb_data->event = GLINK_SSR_EVENT_INIT; |
| 663 | cb_data->edge = ss_info->edge; |
| 664 | ss_info->cb_data = cb_data; |
| 665 | |
| 666 | memset(&open_cfg, 0, sizeof(struct glink_open_config)); |
| 667 | |
| 668 | if (ss_info->xprt) { |
| 669 | open_cfg.transport = ss_info->xprt; |
| 670 | } else { |
| 671 | open_cfg.transport = NULL; |
| 672 | open_cfg.options = GLINK_OPT_INITIAL_XPORT; |
| 673 | } |
| 674 | open_cfg.edge = ss_info->edge; |
| 675 | open_cfg.name = "glink_ssr"; |
| 676 | open_cfg.notify_rx = glink_ssr_notify_rx; |
| 677 | open_cfg.notify_tx_done = glink_ssr_notify_tx_done; |
| 678 | open_cfg.notify_state = glink_ssr_notify_state; |
| 679 | open_cfg.notify_rx_intent_req = glink_ssr_notify_rx_intent_req; |
| 680 | open_cfg.priv = ss_info->cb_data; |
| 681 | open_cfg.rx_intent_req_timeout_ms = GLINK_SSR_INTENT_REQ_TIMEOUT_MS; |
| 682 | |
| 683 | handle = glink_open(&open_cfg); |
| 684 | if (IS_ERR_OR_NULL(handle)) { |
| 685 | GLINK_SSR_ERR( |
| 686 | "<SSR> %s:%s %s: unable to open channel, ret[%d]\n", |
| 687 | open_cfg.edge, open_cfg.name, __func__, |
| 688 | (int)PTR_ERR(handle)); |
| 689 | kfree(cb_data); |
| 690 | cb_data = NULL; |
| 691 | ss_info->cb_data = NULL; |
| 692 | return PTR_ERR(handle); |
| 693 | } |
| 694 | ss_info->handle = handle; |
| 695 | return 0; |
| 696 | } |
| 697 | |
| 698 | /** |
| 699 | * get_info_for_subsystem() - Retrieve information about a subsystem from the |
| 700 | * global subsystem_info_list |
| 701 | * @subsystem: The name of the subsystem recognized by the SSR |
| 702 | * framework |
| 703 | * |
| 704 | * Return: subsys_info structure containing info for the requested subsystem; |
| 705 | * NULL if no structure can be found for the requested subsystem |
| 706 | */ |
| 707 | struct subsys_info *get_info_for_subsystem(const char *subsystem) |
| 708 | { |
| 709 | struct subsys_info *ss_info_entry; |
| 710 | |
| 711 | list_for_each_entry(ss_info_entry, &subsystem_list, |
| 712 | subsystem_list_node) { |
| 713 | if (!strcmp(subsystem, ss_info_entry->ssr_name)) |
| 714 | return ss_info_entry; |
| 715 | } |
| 716 | |
| 717 | return NULL; |
| 718 | } |
| 719 | EXPORT_SYMBOL(get_info_for_subsystem); |
| 720 | |
| 721 | /** |
| 722 | * get_info_for_edge() - Retrieve information about a subsystem from the |
| 723 | * global subsystem_info_list |
| 724 | * @edge: The name of the edge recognized by G-Link |
| 725 | * |
| 726 | * Return: subsys_info structure containing info for the requested subsystem; |
| 727 | * NULL if no structure can be found for the requested subsystem |
| 728 | */ |
| 729 | struct subsys_info *get_info_for_edge(const char *edge) |
| 730 | { |
| 731 | struct subsys_info *ss_info_entry; |
| 732 | |
| 733 | list_for_each_entry(ss_info_entry, &subsystem_list, |
| 734 | subsystem_list_node) { |
| 735 | if (!strcmp(edge, ss_info_entry->edge)) |
| 736 | return ss_info_entry; |
| 737 | } |
| 738 | |
| 739 | return NULL; |
| 740 | } |
| 741 | EXPORT_SYMBOL(get_info_for_edge); |
| 742 | |
| 743 | /** |
| 744 | * glink_ssr_get_seq_num() - Get the current SSR sequence number |
| 745 | * |
| 746 | * Return: The current SSR sequence number |
| 747 | */ |
| 748 | uint32_t glink_ssr_get_seq_num(void) |
| 749 | { |
| 750 | return sequence_number; |
| 751 | } |
| 752 | EXPORT_SYMBOL(glink_ssr_get_seq_num); |
| 753 | |
| 754 | /** |
| 755 | * delete_ss_info_notify_list() - Delete the notify list for a subsystem |
| 756 | * @ss_info: The subsystem info structure |
| 757 | */ |
| 758 | static void delete_ss_info_notify_list(struct subsys_info *ss_info) |
| 759 | { |
| 760 | struct subsys_info_leaf *leaf, *temp; |
| 761 | |
| 762 | list_for_each_entry_safe(leaf, temp, &ss_info->notify_list, |
| 763 | notify_list_node) { |
| 764 | list_del(&leaf->notify_list_node); |
| 765 | kfree(leaf); |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | /** |
| 770 | * glink_ssr_wait_cleanup_done() - Get the value of the |
| 771 | * notifications_successful flag. |
| 772 | * @timeout_multiplier: timeout multiplier for waiting on all processors |
| 773 | * |
| 774 | * Return: True if cleanup_done received from all processors, false otherwise |
| 775 | */ |
| 776 | bool glink_ssr_wait_cleanup_done(unsigned int ssr_timeout_multiplier) |
| 777 | { |
| 778 | int wait_ret = |
| 779 | wait_for_completion_timeout(¬ifications_successful_complete, |
| 780 | ssr_timeout_multiplier * GLINK_SSR_REPLY_TIMEOUT); |
| 781 | reinit_completion(¬ifications_successful_complete); |
| 782 | |
| 783 | if (!notifications_successful || !wait_ret) |
| 784 | return false; |
| 785 | else |
| 786 | return true; |
| 787 | } |
| 788 | EXPORT_SYMBOL(glink_ssr_wait_cleanup_done); |
| 789 | |
| 790 | /** |
| 791 | * glink_ssr_probe() - G-Link SSR platform device probe function |
| 792 | * @pdev: Pointer to the platform device structure |
| 793 | * |
| 794 | * This function parses DT for information on which subsystems should be |
| 795 | * notified when each subsystem undergoes SSR. The global subsystem information |
| 796 | * list is built from this information. In addition, SSR notifier callback |
| 797 | * functions are registered here for the necessary subsystems. |
| 798 | * |
| 799 | * Return: 0 on success, standard error codes otherwise |
| 800 | */ |
| 801 | static int glink_ssr_probe(struct platform_device *pdev) |
| 802 | { |
| 803 | struct device_node *node; |
| 804 | struct device_node *phandle_node; |
| 805 | struct restart_notifier_block *nb; |
| 806 | struct subsys_info *ss_info; |
Channagoud Kadabi | 075db3b | 2017-03-16 14:26:17 -0700 | [diff] [blame] | 807 | struct subsys_info_leaf *ss_info_leaf = NULL; |
Chris Lew | fa6135e | 2016-08-01 13:29:46 -0700 | [diff] [blame] | 808 | struct glink_link_info *link_info; |
| 809 | char *key; |
| 810 | const char *edge; |
| 811 | const char *subsys_name; |
| 812 | const char *xprt; |
| 813 | void *handle; |
| 814 | void *link_state_handle; |
| 815 | int phandle_index = 0; |
| 816 | int ret = 0; |
| 817 | |
| 818 | if (!pdev) { |
| 819 | GLINK_SSR_ERR("<SSR> %s: pdev is NULL\n", __func__); |
| 820 | ret = -EINVAL; |
| 821 | goto pdev_null_or_ss_info_alloc_failed; |
| 822 | } |
| 823 | |
| 824 | node = pdev->dev.of_node; |
| 825 | |
| 826 | ss_info = kmalloc(sizeof(*ss_info), GFP_KERNEL); |
| 827 | if (!ss_info) { |
| 828 | GLINK_SSR_ERR("<SSR> %s: %s\n", __func__, |
| 829 | "Could not allocate subsystem info structure\n"); |
| 830 | ret = -ENOMEM; |
| 831 | goto pdev_null_or_ss_info_alloc_failed; |
| 832 | } |
| 833 | INIT_LIST_HEAD(&ss_info->notify_list); |
| 834 | |
| 835 | link_info = kmalloc(sizeof(struct glink_link_info), |
| 836 | GFP_KERNEL); |
| 837 | if (!link_info) { |
| 838 | GLINK_SSR_ERR("<SSR> %s: %s\n", __func__, |
| 839 | "Could not allocate link info structure\n"); |
| 840 | ret = -ENOMEM; |
| 841 | goto link_info_alloc_failed; |
| 842 | } |
| 843 | ss_info->link_info = link_info; |
| 844 | |
| 845 | key = "label"; |
| 846 | subsys_name = of_get_property(node, key, NULL); |
| 847 | if (!subsys_name) { |
| 848 | GLINK_SSR_ERR("<SSR> %s: missing key %s\n", __func__, key); |
| 849 | ret = -ENODEV; |
| 850 | goto label_or_edge_missing; |
| 851 | } |
| 852 | |
| 853 | key = "qcom,edge"; |
| 854 | edge = of_get_property(node, key, NULL); |
| 855 | if (!edge) { |
| 856 | GLINK_SSR_ERR("<SSR> %s: missing key %s\n", __func__, key); |
| 857 | ret = -ENODEV; |
| 858 | goto label_or_edge_missing; |
| 859 | } |
| 860 | |
| 861 | key = "qcom,xprt"; |
| 862 | xprt = of_get_property(node, key, NULL); |
| 863 | if (!xprt) |
| 864 | GLINK_SSR_LOG( |
| 865 | "%s %s: no transport present for subys/edge %s/%s\n", |
| 866 | "<SSR>", __func__, subsys_name, edge); |
| 867 | |
| 868 | ss_info->ssr_name = subsys_name; |
| 869 | ss_info->edge = edge; |
| 870 | ss_info->xprt = xprt; |
| 871 | ss_info->notify_list_len = 0; |
| 872 | ss_info->link_info->transport = xprt; |
| 873 | ss_info->link_info->edge = edge; |
| 874 | ss_info->link_info->glink_link_state_notif_cb = glink_ssr_link_state_cb; |
| 875 | ss_info->link_up = false; |
| 876 | ss_info->handle = NULL; |
| 877 | ss_info->link_state_handle = NULL; |
| 878 | ss_info->cb_data = NULL; |
| 879 | spin_lock_init(&ss_info->link_up_lock); |
| 880 | |
| 881 | nb = kmalloc(sizeof(struct restart_notifier_block), GFP_KERNEL); |
| 882 | if (!nb) { |
| 883 | GLINK_SSR_ERR("<SSR> %s: Could not allocate notifier block\n", |
| 884 | __func__); |
| 885 | ret = -ENOMEM; |
| 886 | goto label_or_edge_missing; |
| 887 | } |
| 888 | |
| 889 | nb->subsystem = subsys_name; |
| 890 | nb->nb.notifier_call = glink_ssr_restart_notifier_cb; |
| 891 | |
| 892 | handle = subsys_notif_register_notifier(nb->subsystem, &nb->nb); |
| 893 | if (IS_ERR_OR_NULL(handle)) { |
| 894 | GLINK_SSR_ERR("<SSR> %s: Could not register SSR notifier cb\n", |
| 895 | __func__); |
| 896 | ret = -EINVAL; |
| 897 | goto nb_registration_fail; |
| 898 | } |
| 899 | |
| 900 | key = "qcom,notify-edges"; |
| 901 | while (true) { |
| 902 | phandle_node = of_parse_phandle(node, key, phandle_index++); |
| 903 | if (!phandle_node && phandle_index == 0) { |
| 904 | GLINK_SSR_ERR( |
| 905 | "<SSR> %s: qcom,notify-edges is not present", |
| 906 | __func__); |
| 907 | ret = -ENODEV; |
| 908 | goto notify_edges_not_present; |
| 909 | } |
| 910 | |
| 911 | if (!phandle_node) |
| 912 | break; |
| 913 | |
| 914 | ss_info_leaf = kmalloc(sizeof(struct subsys_info_leaf), |
| 915 | GFP_KERNEL); |
| 916 | if (!ss_info_leaf) { |
| 917 | GLINK_SSR_ERR( |
| 918 | "<SSR> %s: Could not allocate subsys_info_leaf\n", |
| 919 | __func__); |
| 920 | ret = -ENOMEM; |
| 921 | goto notify_edges_not_present; |
| 922 | } |
| 923 | |
| 924 | subsys_name = of_get_property(phandle_node, "label", NULL); |
| 925 | edge = of_get_property(phandle_node, "qcom,edge", NULL); |
| 926 | xprt = of_get_property(phandle_node, "qcom,xprt", NULL); |
| 927 | |
| 928 | of_node_put(phandle_node); |
| 929 | |
| 930 | if (!subsys_name || !edge) { |
| 931 | GLINK_SSR_ERR( |
| 932 | "%s, %s: Found DT node with invalid data!\n", |
| 933 | "<SSR>", __func__); |
| 934 | ret = -EINVAL; |
| 935 | goto invalid_dt_node; |
| 936 | } |
| 937 | |
| 938 | ss_info_leaf->ssr_name = subsys_name; |
| 939 | ss_info_leaf->edge = edge; |
| 940 | ss_info_leaf->xprt = xprt; |
| 941 | ss_info_leaf->restarted = false; |
| 942 | list_add_tail(&ss_info_leaf->notify_list_node, |
| 943 | &ss_info->notify_list); |
| 944 | ss_info->notify_list_len++; |
| 945 | } |
| 946 | |
| 947 | list_add_tail(&ss_info->subsystem_list_node, &subsystem_list); |
| 948 | |
| 949 | link_state_handle = glink_register_link_state_cb(ss_info->link_info, |
| 950 | NULL); |
| 951 | if (IS_ERR_OR_NULL(link_state_handle)) { |
| 952 | GLINK_SSR_ERR("<SSR> %s: Could not register link state cb\n", |
| 953 | __func__); |
| 954 | ret = PTR_ERR(link_state_handle); |
| 955 | goto link_state_register_fail; |
| 956 | } |
| 957 | ss_info->link_state_handle = link_state_handle; |
| 958 | |
| 959 | return 0; |
| 960 | |
| 961 | link_state_register_fail: |
| 962 | list_del(&ss_info->subsystem_list_node); |
| 963 | invalid_dt_node: |
| 964 | kfree(ss_info_leaf); |
| 965 | notify_edges_not_present: |
| 966 | subsys_notif_unregister_notifier(handle, &nb->nb); |
| 967 | delete_ss_info_notify_list(ss_info); |
| 968 | nb_registration_fail: |
| 969 | kfree(nb); |
| 970 | label_or_edge_missing: |
| 971 | kfree(link_info); |
| 972 | link_info_alloc_failed: |
| 973 | kfree(ss_info); |
| 974 | pdev_null_or_ss_info_alloc_failed: |
| 975 | return ret; |
| 976 | } |
| 977 | |
| 978 | static const struct of_device_id match_table[] = { |
| 979 | { .compatible = "qcom,glink_ssr" }, |
| 980 | {}, |
| 981 | }; |
| 982 | |
| 983 | static struct platform_driver glink_ssr_driver = { |
| 984 | .probe = glink_ssr_probe, |
| 985 | .driver = { |
| 986 | .name = "msm_glink_ssr", |
| 987 | .owner = THIS_MODULE, |
| 988 | .of_match_table = match_table, |
| 989 | }, |
| 990 | }; |
| 991 | |
| 992 | static int glink_ssr_init(void) |
| 993 | { |
| 994 | int ret; |
| 995 | |
| 996 | glink_ssr_log_ctx = |
| 997 | ipc_log_context_create(NUM_LOG_PAGES, "glink_ssr", 0); |
| 998 | glink_ssr_wq = create_singlethread_workqueue("glink_ssr_wq"); |
| 999 | ret = platform_driver_register(&glink_ssr_driver); |
| 1000 | if (ret) |
| 1001 | GLINK_SSR_ERR("<SSR> %s: %s ret: %d\n", __func__, |
| 1002 | "glink_ssr driver registration failed", ret); |
| 1003 | |
| 1004 | notifications_successful = false; |
| 1005 | init_completion(¬ifications_successful_complete); |
| 1006 | return 0; |
| 1007 | } |
| 1008 | |
| 1009 | module_init(glink_ssr_init); |
| 1010 | |
| 1011 | MODULE_DESCRIPTION("MSM Generic Link (G-Link) SSR Module"); |
| 1012 | MODULE_LICENSE("GPL v2"); |