1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // This file is provided under a dual BSD/GPLv2 license. When using or 4 // redistributing this file, you may do so under either license. 5 // 6 // Copyright(c) 2018 Intel Corporation. All rights reserved. 7 // 8 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com> 9 // 10 11 #include <linux/firmware.h> 12 #include <linux/module.h> 13 #include <sound/soc.h> 14 #include <sound/sof.h> 15 #include "sof-priv.h" 16 #include "ops.h" 17 18 #define CREATE_TRACE_POINTS 19 #include <trace/events/sof.h> 20 21 /* see SOF_DBG_ flags */ 22 static int sof_core_debug = IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_FIRMWARE_TRACE); 23 module_param_named(sof_debug, sof_core_debug, int, 0444); 24 MODULE_PARM_DESC(sof_debug, "SOF core debug options (0x0 all off)"); 25 26 /* SOF defaults if not provided by the platform in ms */ 27 #define TIMEOUT_DEFAULT_IPC_MS 500 28 #define TIMEOUT_DEFAULT_BOOT_MS 2000 29 30 /** 31 * sof_debug_check_flag - check if a given flag(s) is set in sof_core_debug 32 * @mask: Flag or combination of flags to check 33 * 34 * Returns true if all bits set in mask is also set in sof_core_debug, otherwise 35 * false 36 */ 37 bool sof_debug_check_flag(int mask) 38 { 39 if ((sof_core_debug & mask) == mask) 40 return true; 41 42 return false; 43 } 44 EXPORT_SYMBOL(sof_debug_check_flag); 45 46 /* 47 * FW Panic/fault handling. 48 */ 49 50 struct sof_panic_msg { 51 u32 id; 52 const char *msg; 53 }; 54 55 /* standard FW panic types */ 56 static const struct sof_panic_msg panic_msg[] = { 57 {SOF_IPC_PANIC_MEM, "out of memory"}, 58 {SOF_IPC_PANIC_WORK, "work subsystem init failed"}, 59 {SOF_IPC_PANIC_IPC, "IPC subsystem init failed"}, 60 {SOF_IPC_PANIC_ARCH, "arch init failed"}, 61 {SOF_IPC_PANIC_PLATFORM, "platform init failed"}, 62 {SOF_IPC_PANIC_TASK, "scheduler init failed"}, 63 {SOF_IPC_PANIC_EXCEPTION, "runtime exception"}, 64 {SOF_IPC_PANIC_DEADLOCK, "deadlock"}, 65 {SOF_IPC_PANIC_STACK, "stack overflow"}, 66 {SOF_IPC_PANIC_IDLE, "can't enter idle"}, 67 {SOF_IPC_PANIC_WFI, "invalid wait state"}, 68 {SOF_IPC_PANIC_ASSERT, "assertion failed"}, 69 }; 70 71 /** 72 * sof_print_oops_and_stack - Handle the printing of DSP oops and stack trace 73 * @sdev: Pointer to the device's sdev 74 * @level: prink log level to use for the printing 75 * @panic_code: the panic code 76 * @tracep_code: tracepoint code 77 * @oops: Pointer to DSP specific oops data 78 * @panic_info: Pointer to the received panic information message 79 * @stack: Pointer to the call stack data 80 * @stack_words: Number of words in the stack data 81 * 82 * helper to be called from .dbg_dump callbacks. No error code is 83 * provided, it's left as an exercise for the caller of .dbg_dump 84 * (typically IPC or loader) 85 */ 86 void sof_print_oops_and_stack(struct snd_sof_dev *sdev, const char *level, 87 u32 panic_code, u32 tracep_code, void *oops, 88 struct sof_ipc_panic_info *panic_info, 89 void *stack, size_t stack_words) 90 { 91 u32 code; 92 int i; 93 94 /* is firmware dead ? */ 95 if ((panic_code & SOF_IPC_PANIC_MAGIC_MASK) != SOF_IPC_PANIC_MAGIC) { 96 dev_printk(level, sdev->dev, "unexpected fault %#010x trace %#010x\n", 97 panic_code, tracep_code); 98 return; /* no fault ? */ 99 } 100 101 code = panic_code & (SOF_IPC_PANIC_MAGIC_MASK | SOF_IPC_PANIC_CODE_MASK); 102 103 for (i = 0; i < ARRAY_SIZE(panic_msg); i++) { 104 if (panic_msg[i].id == code) { 105 dev_printk(level, sdev->dev, "reason: %s (%#x)\n", 106 panic_msg[i].msg, code & SOF_IPC_PANIC_CODE_MASK); 107 dev_printk(level, sdev->dev, "trace point: %#010x\n", tracep_code); 108 goto out; 109 } 110 } 111 112 /* unknown error */ 113 dev_printk(level, sdev->dev, "unknown panic code: %#x\n", 114 code & SOF_IPC_PANIC_CODE_MASK); 115 dev_printk(level, sdev->dev, "trace point: %#010x\n", tracep_code); 116 117 out: 118 dev_printk(level, sdev->dev, "panic at %s:%d\n", panic_info->filename, 119 panic_info->linenum); 120 sof_oops(sdev, level, oops); 121 sof_stack(sdev, level, oops, stack, stack_words); 122 } 123 EXPORT_SYMBOL(sof_print_oops_and_stack); 124 125 /* Helper to manage DSP state */ 126 void sof_set_fw_state(struct snd_sof_dev *sdev, enum sof_fw_state new_state) 127 { 128 if (sdev->fw_state == new_state) 129 return; 130 131 dev_dbg(sdev->dev, "fw_state change: %d -> %d\n", sdev->fw_state, new_state); 132 sdev->fw_state = new_state; 133 134 switch (new_state) { 135 case SOF_FW_BOOT_NOT_STARTED: 136 case SOF_FW_BOOT_COMPLETE: 137 case SOF_FW_CRASHED: 138 sof_client_fw_state_dispatcher(sdev); 139 fallthrough; 140 default: 141 break; 142 } 143 } 144 EXPORT_SYMBOL(sof_set_fw_state); 145 146 /* 147 * FW Boot State Transition Diagram 148 * 149 * +----------------------------------------------------------------------+ 150 * | | 151 * ------------------ ------------------ | 152 * | | | | | 153 * | BOOT_FAILED |<-------| READY_FAILED | | 154 * | |<--+ | | ------------------ | 155 * ------------------ | ------------------ | | | 156 * ^ | ^ | CRASHED |---+ | 157 * | | | | | | | 158 * (FW Boot Timeout) | (FW_READY FAIL) ------------------ | | 159 * | | | ^ | | 160 * | | | |(DSP Panic) | | 161 * ------------------ | | ------------------ | | 162 * | | | | | | | | 163 * | IN_PROGRESS |---------------+------------->| COMPLETE | | | 164 * | | (FW Boot OK) (FW_READY OK) | | | | 165 * ------------------ | ------------------ | | 166 * ^ | | | | 167 * | | | | | 168 * (FW Loading OK) | (System Suspend/Runtime Suspend) 169 * | | | | | 170 * | (FW Loading Fail) | | | 171 * ------------------ | ------------------ | | | 172 * | | | | |<-----+ | | 173 * | PREPARE |---+ | NOT_STARTED |<---------------------+ | 174 * | | | |<--------------------------+ 175 * ------------------ ------------------ 176 * | ^ | ^ 177 * | | | | 178 * | +-----------------------+ | 179 * | (DSP Probe OK) | 180 * | | 181 * | | 182 * +------------------------------------+ 183 * (System Suspend/Runtime Suspend) 184 */ 185 186 static int sof_probe_continue(struct snd_sof_dev *sdev) 187 { 188 struct snd_sof_pdata *plat_data = sdev->pdata; 189 int ret; 190 191 /* probe the DSP hardware */ 192 ret = snd_sof_probe(sdev); 193 if (ret < 0) { 194 dev_err(sdev->dev, "error: failed to probe DSP %d\n", ret); 195 goto probe_err; 196 } 197 198 sof_set_fw_state(sdev, SOF_FW_BOOT_PREPARE); 199 200 /* check machine info */ 201 ret = sof_machine_check(sdev); 202 if (ret < 0) { 203 dev_err(sdev->dev, "error: failed to get machine info %d\n", 204 ret); 205 goto dsp_err; 206 } 207 208 /* set up platform component driver */ 209 snd_sof_new_platform_drv(sdev); 210 211 if (sdev->dspless_mode_selected) { 212 sof_set_fw_state(sdev, SOF_DSPLESS_MODE); 213 goto skip_dsp_init; 214 } 215 216 /* register any debug/trace capabilities */ 217 ret = snd_sof_dbg_init(sdev); 218 if (ret < 0) { 219 /* 220 * debugfs issues are suppressed in snd_sof_dbg_init() since 221 * we cannot rely on debugfs 222 * here we trap errors due to memory allocation only. 223 */ 224 dev_err(sdev->dev, "error: failed to init DSP trace/debug %d\n", 225 ret); 226 goto dbg_err; 227 } 228 229 /* init the IPC */ 230 sdev->ipc = snd_sof_ipc_init(sdev); 231 if (!sdev->ipc) { 232 ret = -ENOMEM; 233 dev_err(sdev->dev, "error: failed to init DSP IPC %d\n", ret); 234 goto ipc_err; 235 } 236 237 /* load the firmware */ 238 ret = snd_sof_load_firmware(sdev); 239 if (ret < 0) { 240 dev_err(sdev->dev, "error: failed to load DSP firmware %d\n", 241 ret); 242 sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED); 243 goto fw_load_err; 244 } 245 246 sof_set_fw_state(sdev, SOF_FW_BOOT_IN_PROGRESS); 247 248 /* 249 * Boot the firmware. The FW boot status will be modified 250 * in snd_sof_run_firmware() depending on the outcome. 251 */ 252 ret = snd_sof_run_firmware(sdev); 253 if (ret < 0) { 254 dev_err(sdev->dev, "error: failed to boot DSP firmware %d\n", 255 ret); 256 sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED); 257 goto fw_run_err; 258 } 259 260 if (sof_debug_check_flag(SOF_DBG_ENABLE_TRACE)) { 261 sdev->fw_trace_is_supported = true; 262 263 /* init firmware tracing */ 264 ret = sof_fw_trace_init(sdev); 265 if (ret < 0) { 266 /* non fatal */ 267 dev_warn(sdev->dev, "failed to initialize firmware tracing %d\n", 268 ret); 269 } 270 } else { 271 dev_dbg(sdev->dev, "SOF firmware trace disabled\n"); 272 } 273 274 skip_dsp_init: 275 /* hereafter all FW boot flows are for PM reasons */ 276 sdev->first_boot = false; 277 278 /* now register audio DSP platform driver and dai */ 279 ret = devm_snd_soc_register_component(sdev->dev, &sdev->plat_drv, 280 sof_ops(sdev)->drv, 281 sof_ops(sdev)->num_drv); 282 if (ret < 0) { 283 dev_err(sdev->dev, 284 "error: failed to register DSP DAI driver %d\n", ret); 285 goto fw_trace_err; 286 } 287 288 ret = snd_sof_machine_register(sdev, plat_data); 289 if (ret < 0) { 290 dev_err(sdev->dev, 291 "error: failed to register machine driver %d\n", ret); 292 goto fw_trace_err; 293 } 294 295 ret = sof_register_clients(sdev); 296 if (ret < 0) { 297 dev_err(sdev->dev, "failed to register clients %d\n", ret); 298 goto sof_machine_err; 299 } 300 301 /* 302 * Some platforms in SOF, ex: BYT, may not have their platform PM 303 * callbacks set. Increment the usage count so as to 304 * prevent the device from entering runtime suspend. 305 */ 306 if (!sof_ops(sdev)->runtime_suspend || !sof_ops(sdev)->runtime_resume) 307 pm_runtime_get_noresume(sdev->dev); 308 309 if (plat_data->sof_probe_complete) 310 plat_data->sof_probe_complete(sdev->dev); 311 312 sdev->probe_completed = true; 313 314 return 0; 315 316 sof_machine_err: 317 snd_sof_machine_unregister(sdev, plat_data); 318 fw_trace_err: 319 sof_fw_trace_free(sdev); 320 fw_run_err: 321 snd_sof_fw_unload(sdev); 322 fw_load_err: 323 snd_sof_ipc_free(sdev); 324 ipc_err: 325 dbg_err: 326 snd_sof_free_debug(sdev); 327 dsp_err: 328 snd_sof_remove(sdev); 329 probe_err: 330 sof_ops_free(sdev); 331 332 /* all resources freed, update state to match */ 333 sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED); 334 sdev->first_boot = true; 335 336 return ret; 337 } 338 339 static void sof_probe_work(struct work_struct *work) 340 { 341 struct snd_sof_dev *sdev = 342 container_of(work, struct snd_sof_dev, probe_work); 343 int ret; 344 345 ret = sof_probe_continue(sdev); 346 if (ret < 0) { 347 /* errors cannot be propagated, log */ 348 dev_err(sdev->dev, "error: %s failed err: %d\n", __func__, ret); 349 } 350 } 351 352 int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data) 353 { 354 struct snd_sof_dev *sdev; 355 int ret; 356 357 sdev = devm_kzalloc(dev, sizeof(*sdev), GFP_KERNEL); 358 if (!sdev) 359 return -ENOMEM; 360 361 /* initialize sof device */ 362 sdev->dev = dev; 363 364 /* initialize default DSP power state */ 365 sdev->dsp_power_state.state = SOF_DSP_PM_D0; 366 367 sdev->pdata = plat_data; 368 sdev->first_boot = true; 369 dev_set_drvdata(dev, sdev); 370 371 if (sof_core_debug) 372 dev_info(dev, "sof_debug value: %#x\n", sof_core_debug); 373 374 if (sof_debug_check_flag(SOF_DBG_DSPLESS_MODE)) { 375 if (plat_data->desc->dspless_mode_supported) { 376 dev_info(dev, "Switching to DSPless mode\n"); 377 sdev->dspless_mode_selected = true; 378 } else { 379 dev_info(dev, "DSPless mode is not supported by the platform\n"); 380 } 381 } 382 383 /* check IPC support */ 384 if (!(BIT(plat_data->ipc_type) & plat_data->desc->ipc_supported_mask)) { 385 dev_err(dev, "ipc_type %d is not supported on this platform, mask is %#x\n", 386 plat_data->ipc_type, plat_data->desc->ipc_supported_mask); 387 return -EINVAL; 388 } 389 390 /* init ops, if necessary */ 391 ret = sof_ops_init(sdev); 392 if (ret < 0) 393 return ret; 394 395 /* check all mandatory ops */ 396 if (!sof_ops(sdev) || !sof_ops(sdev)->probe) { 397 sof_ops_free(sdev); 398 dev_err(dev, "missing mandatory ops\n"); 399 return -EINVAL; 400 } 401 402 if (!sdev->dspless_mode_selected && 403 (!sof_ops(sdev)->run || !sof_ops(sdev)->block_read || 404 !sof_ops(sdev)->block_write || !sof_ops(sdev)->send_msg || 405 !sof_ops(sdev)->load_firmware || !sof_ops(sdev)->ipc_msg_data)) { 406 sof_ops_free(sdev); 407 dev_err(dev, "missing mandatory DSP ops\n"); 408 return -EINVAL; 409 } 410 411 INIT_LIST_HEAD(&sdev->pcm_list); 412 INIT_LIST_HEAD(&sdev->kcontrol_list); 413 INIT_LIST_HEAD(&sdev->widget_list); 414 INIT_LIST_HEAD(&sdev->pipeline_list); 415 INIT_LIST_HEAD(&sdev->dai_list); 416 INIT_LIST_HEAD(&sdev->dai_link_list); 417 INIT_LIST_HEAD(&sdev->route_list); 418 INIT_LIST_HEAD(&sdev->ipc_client_list); 419 INIT_LIST_HEAD(&sdev->ipc_rx_handler_list); 420 INIT_LIST_HEAD(&sdev->fw_state_handler_list); 421 spin_lock_init(&sdev->ipc_lock); 422 spin_lock_init(&sdev->hw_lock); 423 mutex_init(&sdev->power_state_access); 424 mutex_init(&sdev->ipc_client_mutex); 425 mutex_init(&sdev->client_event_handler_mutex); 426 427 /* set default timeouts if none provided */ 428 if (plat_data->desc->ipc_timeout == 0) 429 sdev->ipc_timeout = TIMEOUT_DEFAULT_IPC_MS; 430 else 431 sdev->ipc_timeout = plat_data->desc->ipc_timeout; 432 if (plat_data->desc->boot_timeout == 0) 433 sdev->boot_timeout = TIMEOUT_DEFAULT_BOOT_MS; 434 else 435 sdev->boot_timeout = plat_data->desc->boot_timeout; 436 437 sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED); 438 439 if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) { 440 INIT_WORK(&sdev->probe_work, sof_probe_work); 441 schedule_work(&sdev->probe_work); 442 return 0; 443 } 444 445 return sof_probe_continue(sdev); 446 } 447 EXPORT_SYMBOL(snd_sof_device_probe); 448 449 bool snd_sof_device_probe_completed(struct device *dev) 450 { 451 struct snd_sof_dev *sdev = dev_get_drvdata(dev); 452 453 return sdev->probe_completed; 454 } 455 EXPORT_SYMBOL(snd_sof_device_probe_completed); 456 457 int snd_sof_device_remove(struct device *dev) 458 { 459 struct snd_sof_dev *sdev = dev_get_drvdata(dev); 460 struct snd_sof_pdata *pdata = sdev->pdata; 461 int ret; 462 463 if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) 464 cancel_work_sync(&sdev->probe_work); 465 466 /* 467 * Unregister any registered client device first before IPC and debugfs 468 * to allow client drivers to be removed cleanly 469 */ 470 sof_unregister_clients(sdev); 471 472 /* 473 * Unregister machine driver. This will unbind the snd_card which 474 * will remove the component driver and unload the topology 475 * before freeing the snd_card. 476 */ 477 snd_sof_machine_unregister(sdev, pdata); 478 479 if (sdev->fw_state > SOF_FW_BOOT_NOT_STARTED) { 480 sof_fw_trace_free(sdev); 481 ret = snd_sof_dsp_power_down_notify(sdev); 482 if (ret < 0) 483 dev_warn(dev, "error: %d failed to prepare DSP for device removal", 484 ret); 485 486 snd_sof_ipc_free(sdev); 487 snd_sof_free_debug(sdev); 488 snd_sof_remove(sdev); 489 } 490 491 sof_ops_free(sdev); 492 493 /* release firmware */ 494 snd_sof_fw_unload(sdev); 495 496 return 0; 497 } 498 EXPORT_SYMBOL(snd_sof_device_remove); 499 500 int snd_sof_device_shutdown(struct device *dev) 501 { 502 struct snd_sof_dev *sdev = dev_get_drvdata(dev); 503 504 if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) 505 cancel_work_sync(&sdev->probe_work); 506 507 if (sdev->fw_state == SOF_FW_BOOT_COMPLETE) { 508 sof_fw_trace_free(sdev); 509 return snd_sof_shutdown(sdev); 510 } 511 512 return 0; 513 } 514 EXPORT_SYMBOL(snd_sof_device_shutdown); 515 516 MODULE_AUTHOR("Liam Girdwood"); 517 MODULE_DESCRIPTION("Sound Open Firmware (SOF) Core"); 518 MODULE_LICENSE("Dual BSD/GPL"); 519 MODULE_ALIAS("platform:sof-audio"); 520 MODULE_IMPORT_NS(SND_SOC_SOF_CLIENT); 521