Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved. |
| 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 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/slab.h> |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 15 | #include <soc/qcom/scm.h> |
| 16 | #include <soc/qcom/subsystem_notif.h> |
| 17 | #include <soc/qcom/service-notifier.h> |
Laxminath Kasam | 605b42f | 2017-08-01 22:02:15 +0530 | [diff] [blame^] | 18 | #include <dsp/audio_notifier.h> |
| 19 | #include "audio_ssr.h" |
| 20 | #include "audio_pdr.h" |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 21 | |
| 22 | /* Audio states internal to notifier. Client */ |
| 23 | /* used states defined in audio_notifier.h */ |
| 24 | /* for AUDIO_NOTIFIER_SERVICE_DOWN & UP */ |
| 25 | #define NO_SERVICE -2 |
| 26 | #define UNINIT_SERVICE -1 |
| 27 | |
| 28 | /* |
| 29 | * Used for each client registered with audio notifier |
| 30 | */ |
| 31 | struct client_data { |
| 32 | struct list_head list; |
| 33 | /* Notifier block given by client */ |
| 34 | struct notifier_block *nb; |
| 35 | char client_name[20]; |
| 36 | int service; |
| 37 | int domain; |
| 38 | }; |
| 39 | |
| 40 | /* |
| 41 | * Used for each service and domain combination |
| 42 | * Tracks information specific to the underlying |
| 43 | * service. |
| 44 | */ |
| 45 | struct service_info { |
| 46 | const char name[20]; |
| 47 | int domain_id; |
| 48 | int state; |
| 49 | void *handle; |
| 50 | /* Notifier block registered to service */ |
| 51 | struct notifier_block *nb; |
| 52 | /* Used to determine when to register and deregister service */ |
| 53 | int num_of_clients; |
| 54 | /* List of all clients registered to the service and domain */ |
| 55 | struct srcu_notifier_head client_nb_list; |
| 56 | }; |
| 57 | |
| 58 | static int audio_notifer_ssr_adsp_cb(struct notifier_block *this, |
| 59 | unsigned long opcode, void *data); |
| 60 | static int audio_notifer_ssr_modem_cb(struct notifier_block *this, |
| 61 | unsigned long opcode, void *data); |
| 62 | static int audio_notifer_pdr_adsp_cb(struct notifier_block *this, |
| 63 | unsigned long opcode, void *data); |
| 64 | |
| 65 | static struct notifier_block notifier_ssr_adsp_nb = { |
| 66 | .notifier_call = audio_notifer_ssr_adsp_cb, |
| 67 | .priority = 0, |
| 68 | }; |
| 69 | |
| 70 | static struct notifier_block notifier_ssr_modem_nb = { |
| 71 | .notifier_call = audio_notifer_ssr_modem_cb, |
| 72 | .priority = 0, |
| 73 | }; |
| 74 | |
| 75 | static struct notifier_block notifier_pdr_adsp_nb = { |
| 76 | .notifier_call = audio_notifer_pdr_adsp_cb, |
| 77 | .priority = 0, |
| 78 | }; |
| 79 | |
| 80 | static struct service_info service_data[AUDIO_NOTIFIER_MAX_SERVICES] |
| 81 | [AUDIO_NOTIFIER_MAX_DOMAINS] = { |
| 82 | |
| 83 | {{ |
| 84 | .name = "SSR_ADSP", |
| 85 | .domain_id = AUDIO_SSR_DOMAIN_ADSP, |
| 86 | .state = AUDIO_NOTIFIER_SERVICE_DOWN, |
| 87 | .nb = ¬ifier_ssr_adsp_nb |
| 88 | }, |
| 89 | { |
| 90 | .name = "SSR_MODEM", |
| 91 | .domain_id = AUDIO_SSR_DOMAIN_MODEM, |
| 92 | .state = AUDIO_NOTIFIER_SERVICE_DOWN, |
| 93 | .nb = ¬ifier_ssr_modem_nb |
| 94 | } }, |
| 95 | |
| 96 | {{ |
| 97 | .name = "PDR_ADSP", |
| 98 | .domain_id = AUDIO_PDR_DOMAIN_ADSP, |
| 99 | .state = UNINIT_SERVICE, |
| 100 | .nb = ¬ifier_pdr_adsp_nb |
| 101 | }, |
| 102 | { /* PDR MODEM service not enabled */ |
| 103 | .name = "INVALID", |
| 104 | .state = NO_SERVICE, |
| 105 | .nb = NULL |
| 106 | } } |
| 107 | }; |
| 108 | |
| 109 | /* Master list of all audio notifier clients */ |
| 110 | struct list_head client_list; |
| 111 | struct mutex notifier_mutex; |
| 112 | |
| 113 | static int audio_notifer_get_default_service(int domain) |
| 114 | { |
| 115 | int service = NO_SERVICE; |
| 116 | |
| 117 | /* initial service to connect per domain */ |
| 118 | switch (domain) { |
| 119 | case AUDIO_NOTIFIER_ADSP_DOMAIN: |
| 120 | service = AUDIO_NOTIFIER_PDR_SERVICE; |
| 121 | break; |
| 122 | case AUDIO_NOTIFIER_MODEM_DOMAIN: |
| 123 | service = AUDIO_NOTIFIER_SSR_SERVICE; |
| 124 | break; |
| 125 | } |
| 126 | |
| 127 | return service; |
| 128 | } |
| 129 | |
| 130 | static void audio_notifer_disable_service(int service) |
| 131 | { |
| 132 | int i; |
| 133 | |
| 134 | for (i = 0; i < AUDIO_NOTIFIER_MAX_DOMAINS; i++) |
| 135 | service_data[service][i].state = NO_SERVICE; |
| 136 | } |
| 137 | |
| 138 | static bool audio_notifer_is_service_enabled(int service) |
| 139 | { |
| 140 | int i; |
| 141 | |
| 142 | for (i = 0; i < AUDIO_NOTIFIER_MAX_DOMAINS; i++) |
| 143 | if (service_data[service][i].state != NO_SERVICE) |
| 144 | return true; |
| 145 | return false; |
| 146 | } |
| 147 | |
| 148 | static void audio_notifer_init_service(int service) |
| 149 | { |
| 150 | int i; |
| 151 | |
| 152 | for (i = 0; i < AUDIO_NOTIFIER_MAX_DOMAINS; i++) { |
| 153 | if (service_data[service][i].state == UNINIT_SERVICE) |
| 154 | service_data[service][i].state = |
| 155 | AUDIO_NOTIFIER_SERVICE_DOWN; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | static int audio_notifer_reg_service(int service, int domain) |
| 160 | { |
| 161 | void *handle; |
| 162 | int ret = 0; |
| 163 | int curr_state = AUDIO_NOTIFIER_SERVICE_DOWN; |
| 164 | |
| 165 | switch (service) { |
| 166 | case AUDIO_NOTIFIER_SSR_SERVICE: |
| 167 | handle = audio_ssr_register( |
| 168 | service_data[service][domain].domain_id, |
| 169 | service_data[service][domain].nb); |
| 170 | break; |
| 171 | case AUDIO_NOTIFIER_PDR_SERVICE: |
| 172 | handle = audio_pdr_service_register( |
| 173 | service_data[service][domain].domain_id, |
| 174 | service_data[service][domain].nb, &curr_state); |
| 175 | |
| 176 | if (curr_state == SERVREG_NOTIF_SERVICE_STATE_UP_V01) |
| 177 | curr_state = AUDIO_NOTIFIER_SERVICE_UP; |
| 178 | else |
| 179 | curr_state = AUDIO_NOTIFIER_SERVICE_DOWN; |
| 180 | break; |
| 181 | default: |
| 182 | pr_err("%s: Invalid service %d\n", |
| 183 | __func__, service); |
| 184 | ret = -EINVAL; |
| 185 | goto done; |
| 186 | } |
| 187 | if (IS_ERR_OR_NULL(handle)) { |
| 188 | pr_err("%s: handle is incorrect for service %s\n", |
| 189 | __func__, service_data[service][domain].name); |
| 190 | ret = -EINVAL; |
| 191 | goto done; |
| 192 | } |
| 193 | service_data[service][domain].state = curr_state; |
| 194 | service_data[service][domain].handle = handle; |
| 195 | |
| 196 | pr_info("%s: service %s is in use\n", |
| 197 | __func__, service_data[service][domain].name); |
| 198 | pr_debug("%s: service %s has current state %d, handle 0x%pK\n", |
| 199 | __func__, service_data[service][domain].name, |
| 200 | service_data[service][domain].state, |
| 201 | service_data[service][domain].handle); |
| 202 | done: |
| 203 | return ret; |
| 204 | } |
| 205 | |
| 206 | static int audio_notifer_dereg_service(int service, int domain) |
| 207 | { |
| 208 | int ret; |
| 209 | |
| 210 | switch (service) { |
| 211 | case AUDIO_NOTIFIER_SSR_SERVICE: |
| 212 | ret = audio_ssr_deregister( |
| 213 | service_data[service][domain].handle, |
| 214 | service_data[service][domain].nb); |
| 215 | break; |
| 216 | case AUDIO_NOTIFIER_PDR_SERVICE: |
| 217 | ret = audio_pdr_service_deregister( |
| 218 | service_data[service][domain].handle, |
| 219 | service_data[service][domain].nb); |
| 220 | break; |
| 221 | default: |
| 222 | pr_err("%s: Invalid service %d\n", |
| 223 | __func__, service); |
| 224 | ret = -EINVAL; |
| 225 | goto done; |
| 226 | } |
| 227 | if (ret < 0) { |
| 228 | pr_err("%s: deregister failed for service %s, ret %d\n", |
| 229 | __func__, service_data[service][domain].name, ret); |
| 230 | goto done; |
| 231 | } |
| 232 | |
| 233 | pr_debug("%s: service %s with handle 0x%pK deregistered\n", |
| 234 | __func__, service_data[service][domain].name, |
| 235 | service_data[service][domain].handle); |
| 236 | |
| 237 | service_data[service][domain].state = AUDIO_NOTIFIER_SERVICE_DOWN; |
| 238 | service_data[service][domain].handle = NULL; |
| 239 | done: |
| 240 | return ret; |
| 241 | } |
| 242 | |
| 243 | static int audio_notifer_reg_client_service(struct client_data *client_data, |
| 244 | int service) |
| 245 | { |
| 246 | int ret = 0; |
| 247 | int domain = client_data->domain; |
| 248 | struct audio_notifier_cb_data data; |
| 249 | |
| 250 | switch (service) { |
| 251 | case AUDIO_NOTIFIER_SSR_SERVICE: |
| 252 | case AUDIO_NOTIFIER_PDR_SERVICE: |
| 253 | if (service_data[service][domain].num_of_clients == 0) |
| 254 | ret = audio_notifer_reg_service(service, domain); |
| 255 | break; |
| 256 | default: |
| 257 | pr_err("%s: Invalid service for client %s, service %d, domain %d\n", |
| 258 | __func__, client_data->client_name, service, domain); |
| 259 | ret = -EINVAL; |
| 260 | goto done; |
| 261 | } |
| 262 | |
| 263 | if (ret < 0) { |
| 264 | pr_err("%s: service registration failed on service %s for client %s\n", |
| 265 | __func__, service_data[service][domain].name, |
| 266 | client_data->client_name); |
| 267 | goto done; |
| 268 | } |
| 269 | |
| 270 | client_data->service = service; |
| 271 | srcu_notifier_chain_register( |
| 272 | &service_data[service][domain].client_nb_list, |
| 273 | client_data->nb); |
| 274 | service_data[service][domain].num_of_clients++; |
| 275 | |
| 276 | pr_debug("%s: registered client %s on service %s, current state 0x%x\n", |
| 277 | __func__, client_data->client_name, |
| 278 | service_data[service][domain].name, |
| 279 | service_data[service][domain].state); |
| 280 | |
| 281 | /* |
| 282 | * PDR registration returns current state |
| 283 | * Force callback of client with current state for PDR |
| 284 | */ |
| 285 | if (client_data->service == AUDIO_NOTIFIER_PDR_SERVICE) { |
| 286 | data.service = service; |
| 287 | data.domain = domain; |
| 288 | (void)client_data->nb->notifier_call(client_data->nb, |
| 289 | service_data[service][domain].state, &data); |
| 290 | } |
| 291 | done: |
| 292 | return ret; |
| 293 | } |
| 294 | |
| 295 | static int audio_notifer_reg_client(struct client_data *client_data) |
| 296 | { |
| 297 | int ret = 0; |
| 298 | int service; |
| 299 | int domain = client_data->domain; |
| 300 | |
| 301 | service = audio_notifer_get_default_service(domain); |
| 302 | if (service < 0) { |
| 303 | pr_err("%s: service %d is incorrect\n", __func__, service); |
| 304 | ret = -EINVAL; |
| 305 | goto done; |
| 306 | } |
| 307 | |
| 308 | /* Search through services to find a valid one to register client on. */ |
| 309 | for (; service >= 0; service--) { |
| 310 | /* If a service is not initialized, wait for it to come up. */ |
| 311 | if (service_data[service][domain].state == UNINIT_SERVICE) |
| 312 | goto done; |
| 313 | /* Skip unsupported service and domain combinations. */ |
| 314 | if (service_data[service][domain].state < 0) |
| 315 | continue; |
| 316 | /* Only register clients who have not acquired a service. */ |
| 317 | if (client_data->service != NO_SERVICE) |
| 318 | continue; |
| 319 | |
| 320 | /* |
| 321 | * Only register clients, who have not acquired a service, on |
| 322 | * the best available service for their domain. Uninitialized |
| 323 | * services will try to register all of their clients after |
| 324 | * they initialize correctly or will disable their service and |
| 325 | * register clients on the next best avaialable service. |
| 326 | */ |
| 327 | pr_debug("%s: register client %s on service %s", |
| 328 | __func__, client_data->client_name, |
| 329 | service_data[service][domain].name); |
| 330 | |
| 331 | ret = audio_notifer_reg_client_service(client_data, service); |
| 332 | if (ret < 0) |
| 333 | pr_err("%s: client %s failed to register on service %s", |
| 334 | __func__, client_data->client_name, |
| 335 | service_data[service][domain].name); |
| 336 | } |
| 337 | |
| 338 | done: |
| 339 | return ret; |
| 340 | } |
| 341 | |
| 342 | static int audio_notifer_dereg_client(struct client_data *client_data) |
| 343 | { |
| 344 | int ret = 0; |
| 345 | int service = client_data->service; |
| 346 | int domain = client_data->domain; |
| 347 | |
| 348 | switch (client_data->service) { |
| 349 | case AUDIO_NOTIFIER_SSR_SERVICE: |
| 350 | case AUDIO_NOTIFIER_PDR_SERVICE: |
| 351 | if (service_data[service][domain].num_of_clients == 1) |
| 352 | ret = audio_notifer_dereg_service(service, domain); |
| 353 | break; |
| 354 | case NO_SERVICE: |
| 355 | goto done; |
| 356 | default: |
| 357 | pr_err("%s: Invalid service for client %s, service %d\n", |
| 358 | __func__, client_data->client_name, |
| 359 | client_data->service); |
| 360 | ret = -EINVAL; |
| 361 | goto done; |
| 362 | } |
| 363 | |
| 364 | if (ret < 0) { |
| 365 | pr_err("%s: deregister failed for client %s on service %s, ret %d\n", |
| 366 | __func__, client_data->client_name, |
| 367 | service_data[service][domain].name, ret); |
| 368 | goto done; |
| 369 | } |
| 370 | |
| 371 | ret = srcu_notifier_chain_unregister(&service_data[service][domain]. |
| 372 | client_nb_list, client_data->nb); |
| 373 | if (ret < 0) { |
| 374 | pr_err("%s: srcu_notifier_chain_unregister failed, ret %d\n", |
| 375 | __func__, ret); |
| 376 | goto done; |
| 377 | } |
| 378 | |
| 379 | pr_debug("%s: deregistered client %s on service %s\n", |
| 380 | __func__, client_data->client_name, |
| 381 | service_data[service][domain].name); |
| 382 | |
| 383 | client_data->service = NO_SERVICE; |
| 384 | if (service_data[service][domain].num_of_clients > 0) |
| 385 | service_data[service][domain].num_of_clients--; |
| 386 | done: |
| 387 | return ret; |
| 388 | } |
| 389 | |
| 390 | static void audio_notifer_reg_all_clients(void) |
| 391 | { |
| 392 | struct list_head *ptr, *next; |
| 393 | struct client_data *client_data; |
| 394 | int ret; |
| 395 | |
| 396 | list_for_each_safe(ptr, next, &client_list) { |
| 397 | client_data = list_entry(ptr, struct client_data, list); |
| 398 | |
| 399 | ret = audio_notifer_reg_client(client_data); |
| 400 | if (ret < 0) |
| 401 | pr_err("%s: audio_notifer_reg_client failed for client %s, ret %d\n", |
| 402 | __func__, client_data->client_name, |
| 403 | ret); |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | static int audio_notifer_pdr_callback(struct notifier_block *this, |
| 408 | unsigned long opcode, void *data) |
| 409 | { |
| 410 | pr_debug("%s: Audio PDR framework state 0x%lx\n", |
| 411 | __func__, opcode); |
| 412 | mutex_lock(¬ifier_mutex); |
| 413 | if (opcode == AUDIO_PDR_FRAMEWORK_DOWN) |
| 414 | audio_notifer_disable_service(AUDIO_NOTIFIER_PDR_SERVICE); |
| 415 | else |
| 416 | audio_notifer_init_service(AUDIO_NOTIFIER_PDR_SERVICE); |
| 417 | |
| 418 | audio_notifer_reg_all_clients(); |
| 419 | mutex_unlock(¬ifier_mutex); |
| 420 | return 0; |
| 421 | } |
| 422 | |
| 423 | static struct notifier_block pdr_nb = { |
| 424 | .notifier_call = audio_notifer_pdr_callback, |
| 425 | .priority = 0, |
| 426 | }; |
| 427 | |
| 428 | static int audio_notifer_convert_opcode(unsigned long opcode, |
| 429 | unsigned long *notifier_opcode) |
| 430 | { |
| 431 | int ret = 0; |
| 432 | |
| 433 | switch (opcode) { |
| 434 | case SUBSYS_BEFORE_SHUTDOWN: |
| 435 | case SERVREG_NOTIF_SERVICE_STATE_DOWN_V01: |
| 436 | *notifier_opcode = AUDIO_NOTIFIER_SERVICE_DOWN; |
| 437 | break; |
| 438 | case SUBSYS_AFTER_POWERUP: |
| 439 | case SERVREG_NOTIF_SERVICE_STATE_UP_V01: |
| 440 | *notifier_opcode = AUDIO_NOTIFIER_SERVICE_UP; |
| 441 | break; |
| 442 | default: |
| 443 | pr_debug("%s: Unused opcode 0x%lx\n", __func__, opcode); |
| 444 | ret = -EINVAL; |
| 445 | } |
| 446 | |
| 447 | return ret; |
| 448 | } |
| 449 | |
| 450 | static int audio_notifer_service_cb(unsigned long opcode, |
| 451 | int service, int domain) |
| 452 | { |
| 453 | int ret = 0; |
| 454 | unsigned long notifier_opcode; |
| 455 | struct audio_notifier_cb_data data; |
| 456 | |
| 457 | if (audio_notifer_convert_opcode(opcode, ¬ifier_opcode) < 0) |
| 458 | goto done; |
| 459 | |
| 460 | data.service = service; |
| 461 | data.domain = domain; |
| 462 | |
| 463 | pr_debug("%s: service %s, opcode 0x%lx\n", |
| 464 | __func__, service_data[service][domain].name, notifier_opcode); |
| 465 | |
| 466 | mutex_lock(¬ifier_mutex); |
| 467 | |
| 468 | service_data[service][domain].state = notifier_opcode; |
| 469 | ret = srcu_notifier_call_chain(&service_data[service][domain]. |
| 470 | client_nb_list, notifier_opcode, &data); |
| 471 | if (ret < 0) |
| 472 | pr_err("%s: srcu_notifier_call_chain returned %d, service %s, opcode 0x%lx\n", |
| 473 | __func__, ret, service_data[service][domain].name, |
| 474 | notifier_opcode); |
| 475 | |
| 476 | mutex_unlock(¬ifier_mutex); |
| 477 | done: |
| 478 | return NOTIFY_OK; |
| 479 | } |
| 480 | |
| 481 | static int audio_notifer_pdr_adsp_cb(struct notifier_block *this, |
| 482 | unsigned long opcode, void *data) |
| 483 | { |
| 484 | return audio_notifer_service_cb(opcode, |
| 485 | AUDIO_NOTIFIER_PDR_SERVICE, |
| 486 | AUDIO_NOTIFIER_ADSP_DOMAIN); |
| 487 | } |
| 488 | |
| 489 | static int audio_notifer_ssr_adsp_cb(struct notifier_block *this, |
| 490 | unsigned long opcode, void *data) |
| 491 | { |
| 492 | if (opcode == SUBSYS_BEFORE_SHUTDOWN) |
| 493 | audio_ssr_send_nmi(data); |
| 494 | |
| 495 | return audio_notifer_service_cb(opcode, |
| 496 | AUDIO_NOTIFIER_SSR_SERVICE, |
| 497 | AUDIO_NOTIFIER_ADSP_DOMAIN); |
| 498 | } |
| 499 | |
| 500 | static int audio_notifer_ssr_modem_cb(struct notifier_block *this, |
| 501 | unsigned long opcode, void *data) |
| 502 | { |
| 503 | return audio_notifer_service_cb(opcode, |
| 504 | AUDIO_NOTIFIER_SSR_SERVICE, |
| 505 | AUDIO_NOTIFIER_MODEM_DOMAIN); |
| 506 | } |
| 507 | |
| 508 | int audio_notifier_deregister(char *client_name) |
| 509 | { |
| 510 | int ret = 0; |
| 511 | int ret2; |
| 512 | struct list_head *ptr, *next; |
| 513 | struct client_data *client_data; |
| 514 | |
| 515 | if (client_name == NULL) { |
| 516 | pr_err("%s: client_name is NULL\n", __func__); |
| 517 | ret = -EINVAL; |
| 518 | goto done; |
| 519 | } |
| 520 | mutex_lock(¬ifier_mutex); |
| 521 | list_for_each_safe(ptr, next, &client_list) { |
| 522 | client_data = list_entry(ptr, struct client_data, list); |
| 523 | if (!strcmp(client_name, client_data->client_name)) { |
| 524 | ret2 = audio_notifer_dereg_client(client_data); |
| 525 | if (ret2 < 0) { |
| 526 | pr_err("%s: audio_notifer_dereg_client failed, ret %d\n, service %d, domain %d", |
| 527 | __func__, ret2, client_data->service, |
| 528 | client_data->domain); |
| 529 | ret = ret2; |
| 530 | continue; |
| 531 | } |
| 532 | list_del(&client_data->list); |
| 533 | kfree(client_data); |
| 534 | } |
| 535 | } |
| 536 | mutex_unlock(¬ifier_mutex); |
| 537 | done: |
| 538 | return ret; |
| 539 | } |
| 540 | EXPORT_SYMBOL(audio_notifier_deregister); |
| 541 | |
| 542 | int audio_notifier_register(char *client_name, int domain, |
| 543 | struct notifier_block *nb) |
| 544 | { |
| 545 | int ret; |
| 546 | struct client_data *client_data; |
| 547 | |
| 548 | if (client_name == NULL) { |
| 549 | pr_err("%s: client_name is NULL\n", __func__); |
| 550 | ret = -EINVAL; |
| 551 | goto done; |
| 552 | } else if (nb == NULL) { |
| 553 | pr_err("%s: Notifier block is NULL\n", __func__); |
| 554 | ret = -EINVAL; |
| 555 | goto done; |
| 556 | } |
| 557 | |
| 558 | client_data = kmalloc(sizeof(*client_data), GFP_KERNEL); |
| 559 | if (client_data == NULL) { |
| 560 | ret = -ENOMEM; |
| 561 | goto done; |
| 562 | } |
| 563 | INIT_LIST_HEAD(&client_data->list); |
| 564 | client_data->nb = nb; |
| 565 | strlcpy(client_data->client_name, client_name, |
| 566 | sizeof(client_data->client_name)); |
| 567 | client_data->service = NO_SERVICE; |
| 568 | client_data->domain = domain; |
| 569 | |
| 570 | mutex_lock(¬ifier_mutex); |
| 571 | ret = audio_notifer_reg_client(client_data); |
| 572 | if (ret < 0) { |
| 573 | mutex_unlock(¬ifier_mutex); |
| 574 | pr_err("%s: audio_notifer_reg_client for client %s failed ret = %d\n", |
| 575 | __func__, client_data->client_name, |
| 576 | ret); |
| 577 | kfree(client_data); |
| 578 | goto done; |
| 579 | } |
| 580 | list_add_tail(&client_data->list, &client_list); |
| 581 | mutex_unlock(¬ifier_mutex); |
| 582 | done: |
| 583 | return ret; |
| 584 | } |
| 585 | EXPORT_SYMBOL(audio_notifier_register); |
| 586 | |
| 587 | static int __init audio_notifier_subsys_init(void) |
| 588 | { |
| 589 | int i, j; |
| 590 | |
| 591 | mutex_init(¬ifier_mutex); |
| 592 | INIT_LIST_HEAD(&client_list); |
| 593 | for (i = 0; i < AUDIO_NOTIFIER_MAX_SERVICES; i++) { |
| 594 | for (j = 0; j < AUDIO_NOTIFIER_MAX_DOMAINS; j++) { |
| 595 | if (service_data[i][j].state <= NO_SERVICE) |
| 596 | continue; |
| 597 | |
| 598 | srcu_init_notifier_head( |
| 599 | &service_data[i][j].client_nb_list); |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | return 0; |
| 604 | } |
| 605 | subsys_initcall(audio_notifier_subsys_init); |
| 606 | |
| 607 | static int __init audio_notifier_init(void) |
| 608 | { |
| 609 | int ret; |
| 610 | |
| 611 | ret = audio_pdr_register(&pdr_nb); |
| 612 | if (ret < 0) { |
| 613 | pr_debug("%s: PDR register failed, ret = %d, disable service\n", |
| 614 | __func__, ret); |
| 615 | audio_notifer_disable_service(AUDIO_NOTIFIER_PDR_SERVICE); |
| 616 | } |
| 617 | |
| 618 | /* Do not return error since PDR enablement is not critical */ |
| 619 | return 0; |
| 620 | } |
| 621 | module_init(audio_notifier_init); |
| 622 | |
| 623 | static int __init audio_notifier_late_init(void) |
| 624 | { |
| 625 | /* |
| 626 | * If pdr registration failed, register clients on next service |
| 627 | * Do in late init to ensure that SSR subsystem is initialized |
| 628 | */ |
| 629 | mutex_lock(¬ifier_mutex); |
| 630 | if (!audio_notifer_is_service_enabled(AUDIO_NOTIFIER_PDR_SERVICE)) |
| 631 | audio_notifer_reg_all_clients(); |
| 632 | |
| 633 | mutex_unlock(¬ifier_mutex); |
| 634 | return 0; |
| 635 | } |
| 636 | late_initcall(audio_notifier_late_init); |