Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016-2017, The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/platform_device.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/stringify.h> |
| 17 | #include <linux/of.h> |
| 18 | #include <linux/debugfs.h> |
| 19 | #include <linux/component.h> |
| 20 | #include <linux/dma-mapping.h> |
| 21 | #include <soc/qcom/ramdump.h> |
| 22 | #include <sound/wcd-dsp-mgr.h> |
| 23 | #include "wcd-dsp-utils.h" |
| 24 | |
| 25 | /* Forward declarations */ |
| 26 | static char *wdsp_get_cmpnt_type_string(enum wdsp_cmpnt_type); |
| 27 | |
| 28 | /* Component related macros */ |
Asish Bhattacharya | 84f7f73 | 2017-07-25 16:29:27 +0530 | [diff] [blame] | 29 | #define WDSP_GET_COMPONENT(wdsp, x) ((x >= WDSP_CMPNT_TYPE_MAX || x < 0) ? \ |
| 30 | NULL : (&(wdsp->cmpnts[x]))) |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 31 | #define WDSP_GET_CMPNT_TYPE_STR(x) wdsp_get_cmpnt_type_string(x) |
| 32 | |
| 33 | /* |
| 34 | * These #defines indicate the bit number in status field |
| 35 | * for each of the status. If bit is set, it indicates |
| 36 | * the status as done, else if bit is not set, it indicates |
| 37 | * the status is either failed or not done. |
| 38 | */ |
| 39 | #define WDSP_STATUS_INITIALIZED BIT(0) |
| 40 | #define WDSP_STATUS_CODE_DLOADED BIT(1) |
| 41 | #define WDSP_STATUS_DATA_DLOADED BIT(2) |
| 42 | #define WDSP_STATUS_BOOTED BIT(3) |
| 43 | |
| 44 | /* Helper macros for printing wdsp messages */ |
| 45 | #define WDSP_ERR(wdsp, fmt, ...) \ |
| 46 | dev_err(wdsp->mdev, "%s: " fmt "\n", __func__, ##__VA_ARGS__) |
| 47 | #define WDSP_DBG(wdsp, fmt, ...) \ |
| 48 | dev_dbg(wdsp->mdev, "%s: " fmt "\n", __func__, ##__VA_ARGS__) |
| 49 | |
| 50 | /* Helper macros for locking */ |
| 51 | #define WDSP_MGR_MUTEX_LOCK(wdsp, lock) \ |
| 52 | { \ |
| 53 | WDSP_DBG(wdsp, "mutex_lock(%s)", \ |
| 54 | __stringify_1(lock)); \ |
| 55 | mutex_lock(&lock); \ |
| 56 | } |
| 57 | |
| 58 | #define WDSP_MGR_MUTEX_UNLOCK(wdsp, lock) \ |
| 59 | { \ |
| 60 | WDSP_DBG(wdsp, "mutex_unlock(%s)", \ |
| 61 | __stringify_1(lock)); \ |
| 62 | mutex_unlock(&lock); \ |
| 63 | } |
| 64 | |
| 65 | /* Helper macros for using status mask */ |
| 66 | #define WDSP_SET_STATUS(wdsp, state) \ |
| 67 | { \ |
| 68 | wdsp->status |= state; \ |
| 69 | WDSP_DBG(wdsp, "set 0x%lx, new_state = 0x%x", \ |
| 70 | state, wdsp->status); \ |
| 71 | } |
| 72 | |
| 73 | #define WDSP_CLEAR_STATUS(wdsp, state) \ |
| 74 | { \ |
| 75 | wdsp->status &= (~state); \ |
| 76 | WDSP_DBG(wdsp, "clear 0x%lx, new_state = 0x%x", \ |
| 77 | state, wdsp->status); \ |
| 78 | } |
| 79 | |
| 80 | #define WDSP_STATUS_IS_SET(wdsp, state) (wdsp->status & state) |
| 81 | |
| 82 | /* SSR relate status macros */ |
| 83 | #define WDSP_SSR_STATUS_WDSP_READY BIT(0) |
| 84 | #define WDSP_SSR_STATUS_CDC_READY BIT(1) |
| 85 | #define WDSP_SSR_STATUS_READY \ |
| 86 | (WDSP_SSR_STATUS_WDSP_READY | WDSP_SSR_STATUS_CDC_READY) |
| 87 | #define WDSP_SSR_READY_WAIT_TIMEOUT (10 * HZ) |
| 88 | |
| 89 | enum wdsp_ssr_type { |
| 90 | |
| 91 | /* Init value, indicates there is no SSR in progress */ |
| 92 | WDSP_SSR_TYPE_NO_SSR = 0, |
| 93 | |
| 94 | /* |
| 95 | * Indicates WDSP crashed. The manager driver internally |
| 96 | * decides when to perform WDSP restart based on the |
| 97 | * users of wdsp. Hence there is no explicit WDSP_UP. |
| 98 | */ |
| 99 | WDSP_SSR_TYPE_WDSP_DOWN, |
| 100 | |
| 101 | /* Indicates codec hardware is down */ |
| 102 | WDSP_SSR_TYPE_CDC_DOWN, |
| 103 | |
| 104 | /* Indicates codec hardware is up, trigger to restart WDSP */ |
| 105 | WDSP_SSR_TYPE_CDC_UP, |
| 106 | }; |
| 107 | |
| 108 | struct wdsp_cmpnt { |
| 109 | |
| 110 | /* OF node of the phandle */ |
| 111 | struct device_node *np; |
| 112 | |
| 113 | /* |
| 114 | * Child component's dev_name, should be set in DT for the child's |
| 115 | * phandle if child's dev->of_node does not match the phandle->of_node |
| 116 | */ |
| 117 | const char *cdev_name; |
| 118 | |
| 119 | /* Child component's device node */ |
| 120 | struct device *cdev; |
| 121 | |
| 122 | /* Private data that component may want back on callbacks */ |
| 123 | void *priv_data; |
| 124 | |
| 125 | /* Child ops */ |
| 126 | struct wdsp_cmpnt_ops *ops; |
| 127 | }; |
| 128 | |
| 129 | struct wdsp_ramdump_data { |
| 130 | |
| 131 | /* Ramdump device */ |
| 132 | void *rd_dev; |
| 133 | |
| 134 | /* DMA address of the dump */ |
| 135 | dma_addr_t rd_addr; |
| 136 | |
| 137 | /* Virtual address of the dump */ |
| 138 | void *rd_v_addr; |
| 139 | |
| 140 | /* Data provided through error interrupt */ |
| 141 | struct wdsp_err_signal_arg err_data; |
| 142 | }; |
| 143 | |
| 144 | struct wdsp_mgr_priv { |
| 145 | |
| 146 | /* Manager driver's struct device pointer */ |
| 147 | struct device *mdev; |
| 148 | |
| 149 | /* Match struct for component framework */ |
| 150 | struct component_match *match; |
| 151 | |
| 152 | /* Manager's ops/function callbacks */ |
| 153 | struct wdsp_mgr_ops *ops; |
| 154 | |
| 155 | /* Array to store information for all expected components */ |
| 156 | struct wdsp_cmpnt cmpnts[WDSP_CMPNT_TYPE_MAX]; |
| 157 | |
| 158 | /* The filename of image to be downloaded */ |
| 159 | const char *img_fname; |
| 160 | |
| 161 | /* Keeps track of current state of manager driver */ |
| 162 | u32 status; |
| 163 | |
| 164 | /* Work to load the firmware image after component binding */ |
| 165 | struct work_struct load_fw_work; |
| 166 | |
| 167 | /* List of segments in image to be downloaded */ |
| 168 | struct list_head *seg_list; |
| 169 | |
| 170 | /* Base address of the image in memory */ |
| 171 | u32 base_addr; |
| 172 | |
| 173 | /* Instances using dsp */ |
| 174 | int dsp_users; |
| 175 | |
| 176 | /* Lock for serializing ops called by components */ |
| 177 | struct mutex api_mutex; |
| 178 | |
| 179 | struct wdsp_ramdump_data dump_data; |
| 180 | |
| 181 | /* SSR related */ |
| 182 | enum wdsp_ssr_type ssr_type; |
| 183 | struct mutex ssr_mutex; |
| 184 | struct work_struct ssr_work; |
| 185 | u16 ready_status; |
| 186 | struct completion ready_compl; |
| 187 | |
| 188 | /* Debugfs related */ |
| 189 | struct dentry *entry; |
| 190 | bool panic_on_error; |
| 191 | }; |
| 192 | |
| 193 | static char *wdsp_get_ssr_type_string(enum wdsp_ssr_type type) |
| 194 | { |
| 195 | switch (type) { |
| 196 | case WDSP_SSR_TYPE_NO_SSR: |
| 197 | return "NO_SSR"; |
| 198 | case WDSP_SSR_TYPE_WDSP_DOWN: |
| 199 | return "WDSP_DOWN"; |
| 200 | case WDSP_SSR_TYPE_CDC_DOWN: |
| 201 | return "CDC_DOWN"; |
| 202 | case WDSP_SSR_TYPE_CDC_UP: |
| 203 | return "CDC_UP"; |
| 204 | default: |
| 205 | pr_err("%s: Invalid ssr_type %d\n", |
| 206 | __func__, type); |
| 207 | return "Invalid"; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | static char *wdsp_get_cmpnt_type_string(enum wdsp_cmpnt_type type) |
| 212 | { |
| 213 | switch (type) { |
| 214 | case WDSP_CMPNT_CONTROL: |
| 215 | return "control"; |
| 216 | case WDSP_CMPNT_IPC: |
| 217 | return "ipc"; |
| 218 | case WDSP_CMPNT_TRANSPORT: |
| 219 | return "transport"; |
| 220 | default: |
| 221 | pr_err("%s: Invalid component type %d\n", |
| 222 | __func__, type); |
| 223 | return "Invalid"; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | static void __wdsp_clr_ready_locked(struct wdsp_mgr_priv *wdsp, |
| 228 | u16 value) |
| 229 | { |
| 230 | wdsp->ready_status &= ~(value); |
| 231 | WDSP_DBG(wdsp, "ready_status = 0x%x", wdsp->ready_status); |
| 232 | } |
| 233 | |
| 234 | static void __wdsp_set_ready_locked(struct wdsp_mgr_priv *wdsp, |
| 235 | u16 value, bool mark_complete) |
| 236 | { |
| 237 | wdsp->ready_status |= value; |
| 238 | WDSP_DBG(wdsp, "ready_status = 0x%x", wdsp->ready_status); |
| 239 | |
| 240 | if (mark_complete && |
| 241 | wdsp->ready_status == WDSP_SSR_STATUS_READY) { |
| 242 | WDSP_DBG(wdsp, "marking ready completion"); |
| 243 | complete(&wdsp->ready_compl); |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | static void wdsp_broadcast_event_upseq(struct wdsp_mgr_priv *wdsp, |
| 248 | enum wdsp_event_type event, |
| 249 | void *data) |
| 250 | { |
| 251 | struct wdsp_cmpnt *cmpnt; |
| 252 | int i; |
| 253 | |
| 254 | for (i = 0; i < WDSP_CMPNT_TYPE_MAX; i++) { |
| 255 | cmpnt = WDSP_GET_COMPONENT(wdsp, i); |
| 256 | if (cmpnt && cmpnt->ops && cmpnt->ops->event_handler) |
| 257 | cmpnt->ops->event_handler(cmpnt->cdev, cmpnt->priv_data, |
| 258 | event, data); |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | static void wdsp_broadcast_event_downseq(struct wdsp_mgr_priv *wdsp, |
| 263 | enum wdsp_event_type event, |
| 264 | void *data) |
| 265 | { |
| 266 | struct wdsp_cmpnt *cmpnt; |
| 267 | int i; |
| 268 | |
| 269 | for (i = WDSP_CMPNT_TYPE_MAX - 1; i >= 0; i--) { |
| 270 | cmpnt = WDSP_GET_COMPONENT(wdsp, i); |
| 271 | if (cmpnt && cmpnt->ops && cmpnt->ops->event_handler) |
| 272 | cmpnt->ops->event_handler(cmpnt->cdev, cmpnt->priv_data, |
| 273 | event, data); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | static int wdsp_unicast_event(struct wdsp_mgr_priv *wdsp, |
| 278 | enum wdsp_cmpnt_type type, |
| 279 | enum wdsp_event_type event, |
| 280 | void *data) |
| 281 | { |
| 282 | struct wdsp_cmpnt *cmpnt; |
| 283 | int ret; |
| 284 | |
| 285 | cmpnt = WDSP_GET_COMPONENT(wdsp, type); |
| 286 | if (cmpnt && cmpnt->ops && cmpnt->ops->event_handler) { |
| 287 | ret = cmpnt->ops->event_handler(cmpnt->cdev, cmpnt->priv_data, |
| 288 | event, data); |
| 289 | } else { |
| 290 | WDSP_ERR(wdsp, "not valid event_handler for %s", |
| 291 | WDSP_GET_CMPNT_TYPE_STR(type)); |
| 292 | ret = -EINVAL; |
| 293 | } |
| 294 | |
| 295 | return ret; |
| 296 | } |
| 297 | |
| 298 | static void wdsp_deinit_components(struct wdsp_mgr_priv *wdsp) |
| 299 | { |
| 300 | struct wdsp_cmpnt *cmpnt; |
| 301 | int i; |
| 302 | |
| 303 | for (i = WDSP_CMPNT_TYPE_MAX - 1; i >= 0; i--) { |
| 304 | cmpnt = WDSP_GET_COMPONENT(wdsp, i); |
| 305 | if (cmpnt && cmpnt->ops && cmpnt->ops->deinit) |
| 306 | cmpnt->ops->deinit(cmpnt->cdev, cmpnt->priv_data); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | static int wdsp_init_components(struct wdsp_mgr_priv *wdsp) |
| 311 | { |
| 312 | struct wdsp_cmpnt *cmpnt; |
| 313 | int fail_idx = WDSP_CMPNT_TYPE_MAX; |
| 314 | int i, ret = 0; |
| 315 | |
| 316 | for (i = 0; i < WDSP_CMPNT_TYPE_MAX; i++) { |
| 317 | |
| 318 | cmpnt = WDSP_GET_COMPONENT(wdsp, i); |
| 319 | |
| 320 | /* Init is allowed to be NULL */ |
| 321 | if (!cmpnt->ops || !cmpnt->ops->init) |
| 322 | continue; |
| 323 | ret = cmpnt->ops->init(cmpnt->cdev, cmpnt->priv_data); |
| 324 | if (ret) { |
| 325 | WDSP_ERR(wdsp, "Init failed (%d) for component %s", |
| 326 | ret, WDSP_GET_CMPNT_TYPE_STR(i)); |
| 327 | fail_idx = i; |
| 328 | break; |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | if (fail_idx < WDSP_CMPNT_TYPE_MAX) { |
| 333 | /* Undo init for already initialized components */ |
| 334 | for (i = fail_idx - 1; i >= 0; i--) { |
| 335 | struct wdsp_cmpnt *cmpnt = WDSP_GET_COMPONENT(wdsp, i); |
| 336 | |
| 337 | if (cmpnt->ops && cmpnt->ops->deinit) |
| 338 | cmpnt->ops->deinit(cmpnt->cdev, |
| 339 | cmpnt->priv_data); |
| 340 | } |
| 341 | } else { |
| 342 | wdsp_broadcast_event_downseq(wdsp, WDSP_EVENT_POST_INIT, NULL); |
| 343 | } |
| 344 | |
| 345 | return ret; |
| 346 | } |
| 347 | |
| 348 | static int wdsp_load_each_segment(struct wdsp_mgr_priv *wdsp, |
| 349 | struct wdsp_img_segment *seg) |
| 350 | { |
| 351 | struct wdsp_img_section img_section; |
| 352 | int ret; |
| 353 | |
| 354 | WDSP_DBG(wdsp, |
| 355 | "base_addr 0x%x, split_fname %s, load_addr 0x%x, size 0x%zx", |
| 356 | wdsp->base_addr, seg->split_fname, seg->load_addr, seg->size); |
| 357 | |
| 358 | if (seg->load_addr < wdsp->base_addr) { |
| 359 | WDSP_ERR(wdsp, "Invalid addr 0x%x, base_addr = 0x%x", |
| 360 | seg->load_addr, wdsp->base_addr); |
| 361 | return -EINVAL; |
| 362 | } |
| 363 | |
| 364 | img_section.addr = seg->load_addr - wdsp->base_addr; |
| 365 | img_section.size = seg->size; |
| 366 | img_section.data = seg->data; |
| 367 | |
| 368 | ret = wdsp_unicast_event(wdsp, WDSP_CMPNT_TRANSPORT, |
| 369 | WDSP_EVENT_DLOAD_SECTION, |
| 370 | &img_section); |
| 371 | if (ret < 0) |
| 372 | WDSP_ERR(wdsp, |
| 373 | "Failed, err = %d for base_addr = 0x%x split_fname = %s, load_addr = 0x%x, size = 0x%zx", |
| 374 | ret, wdsp->base_addr, seg->split_fname, |
| 375 | seg->load_addr, seg->size); |
| 376 | return ret; |
| 377 | } |
| 378 | |
| 379 | static int wdsp_download_segments(struct wdsp_mgr_priv *wdsp, |
| 380 | unsigned int type) |
| 381 | { |
| 382 | struct wdsp_cmpnt *ctl; |
| 383 | struct wdsp_img_segment *seg = NULL; |
| 384 | enum wdsp_event_type pre, post; |
| 385 | long status; |
| 386 | int ret; |
| 387 | |
| 388 | ctl = WDSP_GET_COMPONENT(wdsp, WDSP_CMPNT_CONTROL); |
| 389 | |
| 390 | if (type == WDSP_ELF_FLAG_RE) { |
| 391 | pre = WDSP_EVENT_PRE_DLOAD_CODE; |
| 392 | post = WDSP_EVENT_POST_DLOAD_CODE; |
| 393 | status = WDSP_STATUS_CODE_DLOADED; |
| 394 | } else if (type == WDSP_ELF_FLAG_WRITE) { |
| 395 | pre = WDSP_EVENT_PRE_DLOAD_DATA; |
| 396 | post = WDSP_EVENT_POST_DLOAD_DATA; |
| 397 | status = WDSP_STATUS_DATA_DLOADED; |
| 398 | } else { |
| 399 | WDSP_ERR(wdsp, "Invalid type %u", type); |
| 400 | return -EINVAL; |
| 401 | } |
| 402 | |
| 403 | ret = wdsp_get_segment_list(ctl->cdev, wdsp->img_fname, |
| 404 | type, wdsp->seg_list, &wdsp->base_addr); |
| 405 | if (ret < 0 || |
| 406 | list_empty(wdsp->seg_list)) { |
| 407 | WDSP_ERR(wdsp, "Error %d to get image segments for type %d", |
| 408 | ret, type); |
| 409 | wdsp_broadcast_event_downseq(wdsp, WDSP_EVENT_DLOAD_FAILED, |
| 410 | NULL); |
| 411 | goto done; |
| 412 | } |
| 413 | |
| 414 | /* Notify all components that image is about to be downloaded */ |
| 415 | wdsp_broadcast_event_upseq(wdsp, pre, NULL); |
| 416 | |
| 417 | /* Go through the list of segments and download one by one */ |
| 418 | list_for_each_entry(seg, wdsp->seg_list, list) { |
| 419 | ret = wdsp_load_each_segment(wdsp, seg); |
Laxminath Kasam | 38070be | 2017-08-17 18:21:59 +0530 | [diff] [blame] | 420 | if (ret) |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 421 | goto dload_error; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 422 | } |
| 423 | |
Laxminath Kasam | 38070be | 2017-08-17 18:21:59 +0530 | [diff] [blame] | 424 | /* Flush the list before setting status and notifying components */ |
| 425 | wdsp_flush_segment_list(wdsp->seg_list); |
| 426 | |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 427 | WDSP_SET_STATUS(wdsp, status); |
| 428 | |
| 429 | /* Notify all components that image is downloaded */ |
| 430 | wdsp_broadcast_event_downseq(wdsp, post, NULL); |
Laxminath Kasam | 38070be | 2017-08-17 18:21:59 +0530 | [diff] [blame] | 431 | done: |
| 432 | return ret; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 433 | |
| 434 | dload_error: |
| 435 | wdsp_flush_segment_list(wdsp->seg_list); |
Laxminath Kasam | 38070be | 2017-08-17 18:21:59 +0530 | [diff] [blame] | 436 | wdsp_broadcast_event_downseq(wdsp, WDSP_EVENT_DLOAD_FAILED, NULL); |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 437 | return ret; |
| 438 | } |
| 439 | |
| 440 | static int wdsp_init_and_dload_code_sections(struct wdsp_mgr_priv *wdsp) |
| 441 | { |
| 442 | int ret; |
| 443 | bool is_initialized; |
| 444 | |
| 445 | is_initialized = WDSP_STATUS_IS_SET(wdsp, WDSP_STATUS_INITIALIZED); |
| 446 | |
| 447 | if (!is_initialized) { |
| 448 | /* Components are not initialized yet, initialize them */ |
| 449 | ret = wdsp_init_components(wdsp); |
| 450 | if (ret < 0) { |
| 451 | WDSP_ERR(wdsp, "INIT failed, err = %d", ret); |
| 452 | goto done; |
| 453 | } |
| 454 | WDSP_SET_STATUS(wdsp, WDSP_STATUS_INITIALIZED); |
| 455 | } |
| 456 | |
| 457 | /* Download the read-execute sections of image */ |
| 458 | ret = wdsp_download_segments(wdsp, WDSP_ELF_FLAG_RE); |
| 459 | if (ret < 0) { |
| 460 | WDSP_ERR(wdsp, "Error %d to download code sections", ret); |
| 461 | goto done; |
| 462 | } |
| 463 | done: |
| 464 | return ret; |
| 465 | } |
| 466 | |
| 467 | static void wdsp_load_fw_image(struct work_struct *work) |
| 468 | { |
| 469 | struct wdsp_mgr_priv *wdsp; |
| 470 | int ret; |
| 471 | |
| 472 | wdsp = container_of(work, struct wdsp_mgr_priv, load_fw_work); |
| 473 | if (!wdsp) { |
| 474 | pr_err("%s: Invalid private_data\n", __func__); |
| 475 | return; |
| 476 | } |
| 477 | |
| 478 | ret = wdsp_init_and_dload_code_sections(wdsp); |
| 479 | if (ret < 0) |
| 480 | WDSP_ERR(wdsp, "dload code sections failed, err = %d", ret); |
| 481 | } |
| 482 | |
| 483 | static int wdsp_enable_dsp(struct wdsp_mgr_priv *wdsp) |
| 484 | { |
| 485 | int ret; |
| 486 | |
| 487 | /* Make sure wdsp is in good state */ |
| 488 | if (!WDSP_STATUS_IS_SET(wdsp, WDSP_STATUS_CODE_DLOADED)) { |
| 489 | WDSP_ERR(wdsp, "WDSP in invalid state 0x%x", wdsp->status); |
Laxminath Kasam | 38070be | 2017-08-17 18:21:59 +0530 | [diff] [blame] | 490 | return -EINVAL; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 491 | } |
| 492 | |
Laxminath Kasam | 38070be | 2017-08-17 18:21:59 +0530 | [diff] [blame] | 493 | /* |
| 494 | * Acquire SSR mutex lock to make sure enablement of DSP |
| 495 | * does not race with SSR handling. |
| 496 | */ |
| 497 | WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->ssr_mutex); |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 498 | /* Download the read-write sections of image */ |
| 499 | ret = wdsp_download_segments(wdsp, WDSP_ELF_FLAG_WRITE); |
| 500 | if (ret < 0) { |
| 501 | WDSP_ERR(wdsp, "Data section download failed, err = %d", ret); |
| 502 | goto done; |
| 503 | } |
| 504 | |
| 505 | wdsp_broadcast_event_upseq(wdsp, WDSP_EVENT_PRE_BOOTUP, NULL); |
| 506 | |
| 507 | ret = wdsp_unicast_event(wdsp, WDSP_CMPNT_CONTROL, |
| 508 | WDSP_EVENT_DO_BOOT, NULL); |
| 509 | if (ret < 0) { |
| 510 | WDSP_ERR(wdsp, "Failed to boot dsp, err = %d", ret); |
| 511 | WDSP_CLEAR_STATUS(wdsp, WDSP_STATUS_DATA_DLOADED); |
| 512 | goto done; |
| 513 | } |
| 514 | |
| 515 | wdsp_broadcast_event_downseq(wdsp, WDSP_EVENT_POST_BOOTUP, NULL); |
| 516 | WDSP_SET_STATUS(wdsp, WDSP_STATUS_BOOTED); |
| 517 | done: |
Laxminath Kasam | 38070be | 2017-08-17 18:21:59 +0530 | [diff] [blame] | 518 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex); |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 519 | return ret; |
| 520 | } |
| 521 | |
| 522 | static int wdsp_disable_dsp(struct wdsp_mgr_priv *wdsp) |
| 523 | { |
| 524 | int ret; |
| 525 | |
| 526 | WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->ssr_mutex); |
| 527 | |
| 528 | /* |
| 529 | * If Disable happened while SSR is in progress, then set the SSR |
| 530 | * ready status indicating WDSP is now ready. Ignore the disable |
| 531 | * event here and let the SSR handler go through shutdown. |
| 532 | */ |
| 533 | if (wdsp->ssr_type != WDSP_SSR_TYPE_NO_SSR) { |
| 534 | __wdsp_set_ready_locked(wdsp, WDSP_SSR_STATUS_WDSP_READY, true); |
| 535 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex); |
| 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex); |
| 540 | |
| 541 | /* Make sure wdsp is in good state */ |
| 542 | if (!WDSP_STATUS_IS_SET(wdsp, WDSP_STATUS_BOOTED)) { |
| 543 | WDSP_ERR(wdsp, "wdsp in invalid state 0x%x", wdsp->status); |
| 544 | ret = -EINVAL; |
| 545 | goto done; |
| 546 | } |
| 547 | |
| 548 | wdsp_broadcast_event_downseq(wdsp, WDSP_EVENT_PRE_SHUTDOWN, NULL); |
| 549 | ret = wdsp_unicast_event(wdsp, WDSP_CMPNT_CONTROL, |
| 550 | WDSP_EVENT_DO_SHUTDOWN, NULL); |
| 551 | if (ret < 0) { |
| 552 | WDSP_ERR(wdsp, "Failed to shutdown dsp, err = %d", ret); |
| 553 | goto done; |
| 554 | } |
| 555 | |
| 556 | wdsp_broadcast_event_downseq(wdsp, WDSP_EVENT_POST_SHUTDOWN, NULL); |
| 557 | WDSP_CLEAR_STATUS(wdsp, WDSP_STATUS_BOOTED); |
| 558 | |
| 559 | /* Data sections are to be downloaded per boot */ |
| 560 | WDSP_CLEAR_STATUS(wdsp, WDSP_STATUS_DATA_DLOADED); |
| 561 | done: |
| 562 | return ret; |
| 563 | } |
| 564 | |
| 565 | static int wdsp_register_cmpnt_ops(struct device *wdsp_dev, |
| 566 | struct device *cdev, |
| 567 | void *priv_data, |
| 568 | struct wdsp_cmpnt_ops *ops) |
| 569 | { |
| 570 | struct wdsp_mgr_priv *wdsp; |
| 571 | struct wdsp_cmpnt *cmpnt; |
| 572 | int i, ret; |
| 573 | |
| 574 | if (!wdsp_dev || !cdev || !ops) |
| 575 | return -EINVAL; |
| 576 | |
| 577 | wdsp = dev_get_drvdata(wdsp_dev); |
| 578 | |
| 579 | WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->api_mutex); |
| 580 | |
| 581 | for (i = 0; i < WDSP_CMPNT_TYPE_MAX; i++) { |
| 582 | cmpnt = WDSP_GET_COMPONENT(wdsp, i); |
| 583 | if ((cdev->of_node && cdev->of_node == cmpnt->np) || |
| 584 | (cmpnt->cdev_name && |
| 585 | !strcmp(dev_name(cdev), cmpnt->cdev_name))) { |
| 586 | break; |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | if (i == WDSP_CMPNT_TYPE_MAX) { |
| 591 | WDSP_ERR(wdsp, "Failed to register component dev %s", |
| 592 | dev_name(cdev)); |
| 593 | ret = -EINVAL; |
| 594 | goto done; |
| 595 | } |
| 596 | |
| 597 | cmpnt->cdev = cdev; |
| 598 | cmpnt->ops = ops; |
| 599 | cmpnt->priv_data = priv_data; |
| 600 | done: |
| 601 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->api_mutex); |
| 602 | return 0; |
| 603 | } |
| 604 | |
| 605 | static struct device *wdsp_get_dev_for_cmpnt(struct device *wdsp_dev, |
| 606 | enum wdsp_cmpnt_type type) |
| 607 | { |
| 608 | struct wdsp_mgr_priv *wdsp; |
| 609 | struct wdsp_cmpnt *cmpnt; |
| 610 | |
| 611 | if (!wdsp_dev || type >= WDSP_CMPNT_TYPE_MAX) |
| 612 | return NULL; |
| 613 | |
| 614 | wdsp = dev_get_drvdata(wdsp_dev); |
| 615 | cmpnt = WDSP_GET_COMPONENT(wdsp, type); |
| 616 | |
| 617 | return cmpnt->cdev; |
| 618 | } |
| 619 | |
| 620 | static int wdsp_get_devops_for_cmpnt(struct device *wdsp_dev, |
| 621 | enum wdsp_cmpnt_type type, |
| 622 | void *data) |
| 623 | { |
| 624 | struct wdsp_mgr_priv *wdsp; |
| 625 | int ret = 0; |
| 626 | |
| 627 | if (!wdsp_dev || type >= WDSP_CMPNT_TYPE_MAX) |
| 628 | return -EINVAL; |
| 629 | |
| 630 | wdsp = dev_get_drvdata(wdsp_dev); |
| 631 | ret = wdsp_unicast_event(wdsp, type, |
| 632 | WDSP_EVENT_GET_DEVOPS, data); |
| 633 | if (ret) |
| 634 | WDSP_ERR(wdsp, "get_dev_ops failed for cmpnt type %d", |
| 635 | type); |
| 636 | return ret; |
| 637 | } |
| 638 | |
| 639 | static void wdsp_collect_ramdumps(struct wdsp_mgr_priv *wdsp) |
| 640 | { |
| 641 | struct wdsp_img_section img_section; |
| 642 | struct wdsp_err_signal_arg *data = &wdsp->dump_data.err_data; |
| 643 | struct ramdump_segment rd_seg; |
| 644 | int ret = 0; |
| 645 | |
| 646 | if (wdsp->ssr_type != WDSP_SSR_TYPE_WDSP_DOWN || |
| 647 | !data->mem_dumps_enabled) { |
| 648 | WDSP_DBG(wdsp, "cannot dump memory, ssr_type %s, dumps %s", |
| 649 | wdsp_get_ssr_type_string(wdsp->ssr_type), |
| 650 | !(data->mem_dumps_enabled) ? "disabled" : "enabled"); |
| 651 | goto done; |
| 652 | } |
| 653 | |
| 654 | if (data->dump_size == 0 || |
| 655 | data->remote_start_addr < wdsp->base_addr) { |
| 656 | WDSP_ERR(wdsp, "Invalid start addr 0x%x or dump_size 0x%zx", |
| 657 | data->remote_start_addr, data->dump_size); |
| 658 | goto done; |
| 659 | } |
| 660 | |
| 661 | if (!wdsp->dump_data.rd_dev) { |
| 662 | WDSP_ERR(wdsp, "Ramdump device is not setup"); |
| 663 | goto done; |
| 664 | } |
| 665 | |
| 666 | WDSP_DBG(wdsp, "base_addr 0x%x, dump_start_addr 0x%x, dump_size 0x%zx", |
| 667 | wdsp->base_addr, data->remote_start_addr, data->dump_size); |
| 668 | |
| 669 | /* Allocate memory for dumps */ |
| 670 | wdsp->dump_data.rd_v_addr = dma_alloc_coherent(wdsp->mdev, |
| 671 | data->dump_size, |
| 672 | &wdsp->dump_data.rd_addr, |
| 673 | GFP_KERNEL); |
| 674 | if (!wdsp->dump_data.rd_v_addr) |
| 675 | goto done; |
| 676 | |
| 677 | img_section.addr = data->remote_start_addr - wdsp->base_addr; |
| 678 | img_section.size = data->dump_size; |
| 679 | img_section.data = wdsp->dump_data.rd_v_addr; |
| 680 | |
| 681 | ret = wdsp_unicast_event(wdsp, WDSP_CMPNT_TRANSPORT, |
| 682 | WDSP_EVENT_READ_SECTION, |
| 683 | &img_section); |
| 684 | if (ret < 0) { |
| 685 | WDSP_ERR(wdsp, "Failed to read dumps, size 0x%zx at addr 0x%x", |
| 686 | img_section.size, img_section.addr); |
| 687 | goto err_read_dumps; |
| 688 | } |
| 689 | |
| 690 | /* |
| 691 | * If panic_on_error flag is explicitly set through the debugfs, |
| 692 | * then cause a BUG here to aid debugging. |
| 693 | */ |
| 694 | BUG_ON(wdsp->panic_on_error); |
| 695 | |
| 696 | rd_seg.address = (unsigned long) wdsp->dump_data.rd_v_addr; |
| 697 | rd_seg.size = img_section.size; |
| 698 | rd_seg.v_address = wdsp->dump_data.rd_v_addr; |
| 699 | |
| 700 | ret = do_ramdump(wdsp->dump_data.rd_dev, &rd_seg, 1); |
| 701 | if (ret < 0) |
| 702 | WDSP_ERR(wdsp, "do_ramdump failed with error %d", ret); |
| 703 | |
| 704 | err_read_dumps: |
| 705 | dma_free_coherent(wdsp->mdev, data->dump_size, |
| 706 | wdsp->dump_data.rd_v_addr, wdsp->dump_data.rd_addr); |
| 707 | done: |
| 708 | return; |
| 709 | } |
| 710 | |
| 711 | static void wdsp_ssr_work_fn(struct work_struct *work) |
| 712 | { |
| 713 | struct wdsp_mgr_priv *wdsp; |
| 714 | int ret; |
| 715 | |
| 716 | wdsp = container_of(work, struct wdsp_mgr_priv, ssr_work); |
| 717 | if (!wdsp) { |
| 718 | pr_err("%s: Invalid private_data\n", __func__); |
| 719 | return; |
| 720 | } |
| 721 | |
| 722 | WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->ssr_mutex); |
| 723 | |
| 724 | /* Issue ramdumps and shutdown only if DSP is currently booted */ |
| 725 | if (WDSP_STATUS_IS_SET(wdsp, WDSP_STATUS_BOOTED)) { |
| 726 | wdsp_collect_ramdumps(wdsp); |
| 727 | ret = wdsp_unicast_event(wdsp, WDSP_CMPNT_CONTROL, |
| 728 | WDSP_EVENT_DO_SHUTDOWN, NULL); |
| 729 | if (ret < 0) |
| 730 | WDSP_ERR(wdsp, "Failed WDSP shutdown, err = %d", ret); |
| 731 | |
| 732 | wdsp_broadcast_event_downseq(wdsp, WDSP_EVENT_POST_SHUTDOWN, |
| 733 | NULL); |
| 734 | WDSP_CLEAR_STATUS(wdsp, WDSP_STATUS_BOOTED); |
| 735 | } |
| 736 | |
| 737 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex); |
| 738 | ret = wait_for_completion_timeout(&wdsp->ready_compl, |
| 739 | WDSP_SSR_READY_WAIT_TIMEOUT); |
| 740 | WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->ssr_mutex); |
| 741 | if (ret == 0) { |
| 742 | WDSP_ERR(wdsp, "wait_for_ready timed out, status = 0x%x", |
| 743 | wdsp->ready_status); |
| 744 | goto done; |
| 745 | } |
| 746 | |
| 747 | /* Data sections are to downloaded per WDSP boot */ |
| 748 | WDSP_CLEAR_STATUS(wdsp, WDSP_STATUS_DATA_DLOADED); |
| 749 | |
| 750 | /* |
| 751 | * Even though code section could possible be retained on DSP |
| 752 | * crash, go ahead and still re-download just to avoid any |
| 753 | * memory corruption from previous crash. |
| 754 | */ |
| 755 | WDSP_CLEAR_STATUS(wdsp, WDSP_STATUS_CODE_DLOADED); |
| 756 | |
| 757 | /* If codec restarted, then all components must be re-initialized */ |
| 758 | if (wdsp->ssr_type == WDSP_SSR_TYPE_CDC_UP) { |
| 759 | wdsp_deinit_components(wdsp); |
| 760 | WDSP_CLEAR_STATUS(wdsp, WDSP_STATUS_INITIALIZED); |
| 761 | } |
| 762 | |
| 763 | ret = wdsp_init_and_dload_code_sections(wdsp); |
| 764 | if (ret < 0) { |
| 765 | WDSP_ERR(wdsp, "Failed to dload code sections err = %d", |
| 766 | ret); |
| 767 | goto done; |
| 768 | } |
| 769 | |
| 770 | /* SSR handling is finished, mark SSR type as NO_SSR */ |
| 771 | wdsp->ssr_type = WDSP_SSR_TYPE_NO_SSR; |
| 772 | done: |
| 773 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex); |
| 774 | } |
| 775 | |
| 776 | static int wdsp_ssr_handler(struct wdsp_mgr_priv *wdsp, void *arg, |
| 777 | enum wdsp_ssr_type ssr_type) |
| 778 | { |
| 779 | enum wdsp_ssr_type current_ssr_type; |
| 780 | struct wdsp_err_signal_arg *err_data; |
| 781 | |
| 782 | WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->ssr_mutex); |
| 783 | |
| 784 | current_ssr_type = wdsp->ssr_type; |
| 785 | WDSP_DBG(wdsp, "Current ssr_type %s, handling ssr_type %s", |
| 786 | wdsp_get_ssr_type_string(current_ssr_type), |
| 787 | wdsp_get_ssr_type_string(ssr_type)); |
| 788 | wdsp->ssr_type = ssr_type; |
| 789 | |
| 790 | if (arg) { |
| 791 | err_data = (struct wdsp_err_signal_arg *) arg; |
| 792 | memcpy(&wdsp->dump_data.err_data, err_data, |
| 793 | sizeof(*err_data)); |
| 794 | } else { |
| 795 | memset(&wdsp->dump_data.err_data, 0, |
| 796 | sizeof(wdsp->dump_data.err_data)); |
| 797 | } |
| 798 | |
| 799 | switch (ssr_type) { |
| 800 | |
| 801 | case WDSP_SSR_TYPE_WDSP_DOWN: |
| 802 | __wdsp_clr_ready_locked(wdsp, WDSP_SSR_STATUS_WDSP_READY); |
| 803 | wdsp_broadcast_event_downseq(wdsp, WDSP_EVENT_PRE_SHUTDOWN, |
| 804 | NULL); |
| 805 | schedule_work(&wdsp->ssr_work); |
| 806 | break; |
| 807 | |
| 808 | case WDSP_SSR_TYPE_CDC_DOWN: |
| 809 | __wdsp_clr_ready_locked(wdsp, WDSP_SSR_STATUS_CDC_READY); |
| 810 | /* |
| 811 | * If DSP is booted when CDC_DOWN is received, it needs |
| 812 | * to be shutdown. |
| 813 | */ |
| 814 | if (WDSP_STATUS_IS_SET(wdsp, WDSP_STATUS_BOOTED)) { |
| 815 | __wdsp_clr_ready_locked(wdsp, |
| 816 | WDSP_SSR_STATUS_WDSP_READY); |
| 817 | wdsp_broadcast_event_downseq(wdsp, |
| 818 | WDSP_EVENT_PRE_SHUTDOWN, |
| 819 | NULL); |
| 820 | } |
| 821 | |
| 822 | schedule_work(&wdsp->ssr_work); |
| 823 | break; |
| 824 | |
| 825 | case WDSP_SSR_TYPE_CDC_UP: |
| 826 | __wdsp_set_ready_locked(wdsp, WDSP_SSR_STATUS_CDC_READY, true); |
| 827 | break; |
| 828 | |
| 829 | default: |
| 830 | WDSP_ERR(wdsp, "undefined ssr_type %d\n", ssr_type); |
| 831 | /* Revert back the ssr_type for undefined events */ |
| 832 | wdsp->ssr_type = current_ssr_type; |
| 833 | break; |
| 834 | } |
| 835 | |
| 836 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex); |
| 837 | |
| 838 | return 0; |
| 839 | } |
| 840 | |
Walter Yang | 83b0584 | 2017-11-17 15:47:57 +0800 | [diff] [blame^] | 841 | #ifdef CONFIG_DEBUG_FS |
| 842 | static int wdsp_debug_dump_handler(struct wdsp_mgr_priv *wdsp, void *arg) |
| 843 | { |
| 844 | struct wdsp_err_signal_arg *err_data; |
| 845 | int ret = 0; |
| 846 | |
| 847 | WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->ssr_mutex); |
| 848 | /* If there is no SSR, set the SSR type to collect ramdumps */ |
| 849 | if (wdsp->ssr_type == WDSP_SSR_TYPE_NO_SSR) { |
| 850 | wdsp->ssr_type = WDSP_SSR_TYPE_WDSP_DOWN; |
| 851 | } else { |
| 852 | WDSP_DBG(wdsp, "SSR handling is running, skip debug ramdump"); |
| 853 | ret = 0; |
| 854 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex); |
| 855 | goto done; |
| 856 | } |
| 857 | if (arg) { |
| 858 | err_data = (struct wdsp_err_signal_arg *) arg; |
| 859 | memcpy(&wdsp->dump_data.err_data, err_data, |
| 860 | sizeof(*err_data)); |
| 861 | } else { |
| 862 | WDSP_DBG(wdsp, "Invalid input, arg is NULL"); |
| 863 | ret = -EINVAL; |
| 864 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex); |
| 865 | goto done; |
| 866 | } |
| 867 | wdsp_collect_ramdumps(wdsp); |
| 868 | wdsp->ssr_type = WDSP_SSR_TYPE_NO_SSR; |
| 869 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->ssr_mutex); |
| 870 | done: |
| 871 | return ret; |
| 872 | } |
| 873 | #else |
| 874 | static int wdsp_debug_dump_handler(struct wdsp_mgr_priv *wdsp, void *arg) |
| 875 | { |
| 876 | return 0; |
| 877 | } |
| 878 | #endif |
| 879 | |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 880 | static int wdsp_signal_handler(struct device *wdsp_dev, |
| 881 | enum wdsp_signal signal, void *arg) |
| 882 | { |
| 883 | struct wdsp_mgr_priv *wdsp; |
| 884 | int ret; |
| 885 | |
| 886 | if (!wdsp_dev) |
| 887 | return -EINVAL; |
| 888 | |
| 889 | wdsp = dev_get_drvdata(wdsp_dev); |
| 890 | WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->api_mutex); |
| 891 | |
| 892 | WDSP_DBG(wdsp, "Raised signal %d", signal); |
| 893 | |
| 894 | switch (signal) { |
| 895 | case WDSP_IPC1_INTR: |
| 896 | ret = wdsp_unicast_event(wdsp, WDSP_CMPNT_IPC, |
| 897 | WDSP_EVENT_IPC1_INTR, NULL); |
| 898 | break; |
| 899 | case WDSP_ERR_INTR: |
| 900 | ret = wdsp_ssr_handler(wdsp, arg, WDSP_SSR_TYPE_WDSP_DOWN); |
| 901 | break; |
| 902 | case WDSP_CDC_DOWN_SIGNAL: |
| 903 | ret = wdsp_ssr_handler(wdsp, arg, WDSP_SSR_TYPE_CDC_DOWN); |
| 904 | break; |
| 905 | case WDSP_CDC_UP_SIGNAL: |
| 906 | ret = wdsp_ssr_handler(wdsp, arg, WDSP_SSR_TYPE_CDC_UP); |
| 907 | break; |
Walter Yang | 83b0584 | 2017-11-17 15:47:57 +0800 | [diff] [blame^] | 908 | case WDSP_DEBUG_DUMP: |
| 909 | ret = wdsp_debug_dump_handler(wdsp, arg); |
| 910 | break; |
Asish Bhattacharya | 8e2277f | 2017-07-20 18:31:55 +0530 | [diff] [blame] | 911 | default: |
| 912 | ret = -EINVAL; |
| 913 | break; |
| 914 | } |
| 915 | |
| 916 | if (ret < 0) |
| 917 | WDSP_ERR(wdsp, "handling signal %d failed with error %d", |
| 918 | signal, ret); |
| 919 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->api_mutex); |
| 920 | |
| 921 | return ret; |
| 922 | } |
| 923 | |
| 924 | static int wdsp_vote_for_dsp(struct device *wdsp_dev, |
| 925 | bool vote) |
| 926 | { |
| 927 | struct wdsp_mgr_priv *wdsp; |
| 928 | int ret = 0; |
| 929 | |
| 930 | if (!wdsp_dev) |
| 931 | return -EINVAL; |
| 932 | |
| 933 | wdsp = dev_get_drvdata(wdsp_dev); |
| 934 | |
| 935 | WDSP_MGR_MUTEX_LOCK(wdsp, wdsp->api_mutex); |
| 936 | WDSP_DBG(wdsp, "request %s, current users = %d", |
| 937 | vote ? "enable" : "disable", wdsp->dsp_users); |
| 938 | |
| 939 | if (vote) { |
| 940 | wdsp->dsp_users++; |
| 941 | if (wdsp->dsp_users == 1) |
| 942 | ret = wdsp_enable_dsp(wdsp); |
| 943 | } else { |
| 944 | if (wdsp->dsp_users == 0) |
| 945 | goto done; |
| 946 | |
| 947 | wdsp->dsp_users--; |
| 948 | if (wdsp->dsp_users == 0) |
| 949 | ret = wdsp_disable_dsp(wdsp); |
| 950 | } |
| 951 | |
| 952 | if (ret < 0) |
| 953 | WDSP_DBG(wdsp, "wdsp %s failed, err = %d", |
| 954 | vote ? "enable" : "disable", ret); |
| 955 | |
| 956 | done: |
| 957 | WDSP_MGR_MUTEX_UNLOCK(wdsp, wdsp->api_mutex); |
| 958 | return ret; |
| 959 | } |
| 960 | |
| 961 | static int wdsp_suspend(struct device *wdsp_dev) |
| 962 | { |
| 963 | struct wdsp_mgr_priv *wdsp; |
| 964 | int rc = 0, i; |
| 965 | |
| 966 | if (!wdsp_dev) { |
| 967 | pr_err("%s: Invalid handle to device\n", __func__); |
| 968 | return -EINVAL; |
| 969 | } |
| 970 | |
| 971 | wdsp = dev_get_drvdata(wdsp_dev); |
| 972 | |
| 973 | for (i = WDSP_CMPNT_TYPE_MAX - 1; i >= 0; i--) { |
| 974 | rc = wdsp_unicast_event(wdsp, i, WDSP_EVENT_SUSPEND, NULL); |
| 975 | if (rc < 0) { |
| 976 | WDSP_ERR(wdsp, "component %s failed to suspend\n", |
| 977 | WDSP_GET_CMPNT_TYPE_STR(i)); |
| 978 | break; |
| 979 | } |
| 980 | } |
| 981 | |
| 982 | return rc; |
| 983 | } |
| 984 | |
| 985 | static int wdsp_resume(struct device *wdsp_dev) |
| 986 | { |
| 987 | struct wdsp_mgr_priv *wdsp; |
| 988 | int rc = 0, i; |
| 989 | |
| 990 | if (!wdsp_dev) { |
| 991 | pr_err("%s: Invalid handle to device\n", __func__); |
| 992 | return -EINVAL; |
| 993 | } |
| 994 | |
| 995 | wdsp = dev_get_drvdata(wdsp_dev); |
| 996 | |
| 997 | for (i = 0; i < WDSP_CMPNT_TYPE_MAX; i++) { |
| 998 | rc = wdsp_unicast_event(wdsp, i, WDSP_EVENT_RESUME, NULL); |
| 999 | if (rc < 0) { |
| 1000 | WDSP_ERR(wdsp, "component %s failed to resume\n", |
| 1001 | WDSP_GET_CMPNT_TYPE_STR(i)); |
| 1002 | break; |
| 1003 | } |
| 1004 | } |
| 1005 | |
| 1006 | return rc; |
| 1007 | } |
| 1008 | |
| 1009 | static struct wdsp_mgr_ops wdsp_ops = { |
| 1010 | .register_cmpnt_ops = wdsp_register_cmpnt_ops, |
| 1011 | .get_dev_for_cmpnt = wdsp_get_dev_for_cmpnt, |
| 1012 | .get_devops_for_cmpnt = wdsp_get_devops_for_cmpnt, |
| 1013 | .signal_handler = wdsp_signal_handler, |
| 1014 | .vote_for_dsp = wdsp_vote_for_dsp, |
| 1015 | .suspend = wdsp_suspend, |
| 1016 | .resume = wdsp_resume, |
| 1017 | }; |
| 1018 | |
| 1019 | static int wdsp_mgr_compare_of(struct device *dev, void *data) |
| 1020 | { |
| 1021 | struct wdsp_cmpnt *cmpnt = data; |
| 1022 | |
| 1023 | /* |
| 1024 | * First try to match based on of_node, if of_node is not |
| 1025 | * present, try to match on the dev_name |
| 1026 | */ |
| 1027 | return ((dev->of_node && dev->of_node == cmpnt->np) || |
| 1028 | (cmpnt->cdev_name && |
| 1029 | !strcmp(dev_name(dev), cmpnt->cdev_name))); |
| 1030 | } |
| 1031 | |
| 1032 | static void wdsp_mgr_debugfs_init(struct wdsp_mgr_priv *wdsp) |
| 1033 | { |
| 1034 | wdsp->entry = debugfs_create_dir("wdsp_mgr", NULL); |
| 1035 | if (IS_ERR_OR_NULL(wdsp->entry)) |
| 1036 | return; |
| 1037 | |
| 1038 | debugfs_create_bool("panic_on_error", 0644, |
| 1039 | wdsp->entry, &wdsp->panic_on_error); |
| 1040 | } |
| 1041 | |
| 1042 | static void wdsp_mgr_debugfs_remove(struct wdsp_mgr_priv *wdsp) |
| 1043 | { |
| 1044 | debugfs_remove_recursive(wdsp->entry); |
| 1045 | wdsp->entry = NULL; |
| 1046 | } |
| 1047 | |
| 1048 | static int wdsp_mgr_bind(struct device *dev) |
| 1049 | { |
| 1050 | struct wdsp_mgr_priv *wdsp = dev_get_drvdata(dev); |
| 1051 | struct wdsp_cmpnt *cmpnt; |
| 1052 | int ret, idx; |
| 1053 | |
| 1054 | wdsp->ops = &wdsp_ops; |
| 1055 | |
| 1056 | /* Setup ramdump device */ |
| 1057 | wdsp->dump_data.rd_dev = create_ramdump_device("wdsp", dev); |
| 1058 | if (!wdsp->dump_data.rd_dev) |
| 1059 | dev_info(dev, "%s: create_ramdump_device failed\n", __func__); |
| 1060 | |
| 1061 | ret = component_bind_all(dev, wdsp->ops); |
| 1062 | if (ret < 0) |
| 1063 | WDSP_ERR(wdsp, "component_bind_all failed %d\n", ret); |
| 1064 | |
| 1065 | /* Make sure all components registered ops */ |
| 1066 | for (idx = 0; idx < WDSP_CMPNT_TYPE_MAX; idx++) { |
| 1067 | cmpnt = WDSP_GET_COMPONENT(wdsp, idx); |
| 1068 | if (!cmpnt->cdev || !cmpnt->ops) { |
| 1069 | WDSP_ERR(wdsp, "%s did not register ops\n", |
| 1070 | WDSP_GET_CMPNT_TYPE_STR(idx)); |
| 1071 | ret = -EINVAL; |
| 1072 | component_unbind_all(dev, wdsp->ops); |
| 1073 | break; |
| 1074 | } |
| 1075 | } |
| 1076 | |
| 1077 | wdsp_mgr_debugfs_init(wdsp); |
| 1078 | |
| 1079 | /* Schedule the work to download image if binding was successful. */ |
| 1080 | if (!ret) |
| 1081 | schedule_work(&wdsp->load_fw_work); |
| 1082 | |
| 1083 | return ret; |
| 1084 | } |
| 1085 | |
| 1086 | static void wdsp_mgr_unbind(struct device *dev) |
| 1087 | { |
| 1088 | struct wdsp_mgr_priv *wdsp = dev_get_drvdata(dev); |
| 1089 | struct wdsp_cmpnt *cmpnt; |
| 1090 | int idx; |
| 1091 | |
| 1092 | component_unbind_all(dev, wdsp->ops); |
| 1093 | |
| 1094 | wdsp_mgr_debugfs_remove(wdsp); |
| 1095 | |
| 1096 | if (wdsp->dump_data.rd_dev) { |
| 1097 | destroy_ramdump_device(wdsp->dump_data.rd_dev); |
| 1098 | wdsp->dump_data.rd_dev = NULL; |
| 1099 | } |
| 1100 | |
| 1101 | /* Clear all status bits */ |
| 1102 | wdsp->status = 0x00; |
| 1103 | |
| 1104 | /* clean up the components */ |
| 1105 | for (idx = 0; idx < WDSP_CMPNT_TYPE_MAX; idx++) { |
| 1106 | cmpnt = WDSP_GET_COMPONENT(wdsp, idx); |
| 1107 | cmpnt->cdev = NULL; |
| 1108 | cmpnt->ops = NULL; |
| 1109 | cmpnt->priv_data = NULL; |
| 1110 | } |
| 1111 | } |
| 1112 | |
| 1113 | static const struct component_master_ops wdsp_master_ops = { |
| 1114 | .bind = wdsp_mgr_bind, |
| 1115 | .unbind = wdsp_mgr_unbind, |
| 1116 | }; |
| 1117 | |
| 1118 | static void *wdsp_mgr_parse_phandle(struct wdsp_mgr_priv *wdsp, |
| 1119 | int index) |
| 1120 | { |
| 1121 | struct device *mdev = wdsp->mdev; |
| 1122 | struct device_node *np; |
| 1123 | struct wdsp_cmpnt *cmpnt = NULL; |
| 1124 | struct of_phandle_args pargs; |
| 1125 | u32 value; |
| 1126 | int ret; |
| 1127 | |
| 1128 | ret = of_parse_phandle_with_fixed_args(mdev->of_node, |
| 1129 | "qcom,wdsp-components", 1, |
| 1130 | index, &pargs); |
| 1131 | if (ret) { |
| 1132 | WDSP_ERR(wdsp, "parse_phandle at index %d failed %d", |
| 1133 | index, ret); |
| 1134 | return NULL; |
| 1135 | } |
| 1136 | |
| 1137 | np = pargs.np; |
| 1138 | value = pargs.args[0]; |
| 1139 | |
| 1140 | if (value >= WDSP_CMPNT_TYPE_MAX) { |
| 1141 | WDSP_ERR(wdsp, "invalid phandle_arg to of_node %s", np->name); |
| 1142 | goto done; |
| 1143 | } |
| 1144 | |
| 1145 | cmpnt = WDSP_GET_COMPONENT(wdsp, value); |
| 1146 | if (cmpnt->np || cmpnt->cdev_name) { |
| 1147 | WDSP_ERR(wdsp, "cmpnt %d already added", value); |
| 1148 | cmpnt = NULL; |
| 1149 | goto done; |
| 1150 | } |
| 1151 | |
| 1152 | cmpnt->np = np; |
| 1153 | of_property_read_string(np, "qcom,wdsp-cmpnt-dev-name", |
| 1154 | &cmpnt->cdev_name); |
| 1155 | done: |
| 1156 | of_node_put(np); |
| 1157 | return cmpnt; |
| 1158 | } |
| 1159 | |
| 1160 | static int wdsp_mgr_parse_dt_entries(struct wdsp_mgr_priv *wdsp) |
| 1161 | { |
| 1162 | struct device *dev = wdsp->mdev; |
| 1163 | void *match_data; |
| 1164 | int ph_idx, ret; |
| 1165 | |
| 1166 | ret = of_property_read_string(dev->of_node, "qcom,img-filename", |
| 1167 | &wdsp->img_fname); |
| 1168 | if (ret < 0) { |
| 1169 | WDSP_ERR(wdsp, "Reading property %s failed, error = %d", |
| 1170 | "qcom,img-filename", ret); |
| 1171 | return ret; |
| 1172 | } |
| 1173 | |
| 1174 | ret = of_count_phandle_with_args(dev->of_node, |
| 1175 | "qcom,wdsp-components", |
| 1176 | NULL); |
| 1177 | if (ret == -ENOENT) { |
| 1178 | WDSP_ERR(wdsp, "Property %s not defined in DT", |
| 1179 | "qcom,wdsp-components"); |
| 1180 | goto done; |
| 1181 | } else if (ret != WDSP_CMPNT_TYPE_MAX * 2) { |
| 1182 | WDSP_ERR(wdsp, "Invalid phandle + arg count %d, expected %d", |
| 1183 | ret, WDSP_CMPNT_TYPE_MAX * 2); |
| 1184 | ret = -EINVAL; |
| 1185 | goto done; |
| 1186 | } |
| 1187 | |
| 1188 | ret = 0; |
| 1189 | |
| 1190 | for (ph_idx = 0; ph_idx < WDSP_CMPNT_TYPE_MAX; ph_idx++) { |
| 1191 | |
| 1192 | match_data = wdsp_mgr_parse_phandle(wdsp, ph_idx); |
| 1193 | if (!match_data) { |
| 1194 | WDSP_ERR(wdsp, "component not found at idx %d", ph_idx); |
| 1195 | ret = -EINVAL; |
| 1196 | goto done; |
| 1197 | } |
| 1198 | |
| 1199 | component_match_add(dev, &wdsp->match, |
| 1200 | wdsp_mgr_compare_of, match_data); |
| 1201 | } |
| 1202 | |
| 1203 | done: |
| 1204 | return ret; |
| 1205 | } |
| 1206 | |
| 1207 | static int wdsp_mgr_probe(struct platform_device *pdev) |
| 1208 | { |
| 1209 | struct wdsp_mgr_priv *wdsp; |
| 1210 | struct device *mdev = &pdev->dev; |
| 1211 | int ret; |
| 1212 | |
| 1213 | wdsp = devm_kzalloc(mdev, sizeof(*wdsp), GFP_KERNEL); |
| 1214 | if (!wdsp) |
| 1215 | return -ENOMEM; |
| 1216 | wdsp->mdev = mdev; |
| 1217 | wdsp->seg_list = devm_kzalloc(mdev, sizeof(struct list_head), |
| 1218 | GFP_KERNEL); |
| 1219 | if (!wdsp->seg_list) { |
| 1220 | devm_kfree(mdev, wdsp); |
| 1221 | return -ENOMEM; |
| 1222 | } |
| 1223 | |
| 1224 | ret = wdsp_mgr_parse_dt_entries(wdsp); |
| 1225 | if (ret) |
| 1226 | goto err_dt_parse; |
| 1227 | |
| 1228 | INIT_WORK(&wdsp->load_fw_work, wdsp_load_fw_image); |
| 1229 | INIT_LIST_HEAD(wdsp->seg_list); |
| 1230 | mutex_init(&wdsp->api_mutex); |
| 1231 | mutex_init(&wdsp->ssr_mutex); |
| 1232 | wdsp->ssr_type = WDSP_SSR_TYPE_NO_SSR; |
| 1233 | wdsp->ready_status = WDSP_SSR_STATUS_READY; |
| 1234 | INIT_WORK(&wdsp->ssr_work, wdsp_ssr_work_fn); |
| 1235 | init_completion(&wdsp->ready_compl); |
| 1236 | arch_setup_dma_ops(wdsp->mdev, 0, 0, NULL, 0); |
| 1237 | dev_set_drvdata(mdev, wdsp); |
| 1238 | |
| 1239 | ret = component_master_add_with_match(mdev, &wdsp_master_ops, |
| 1240 | wdsp->match); |
| 1241 | if (ret < 0) { |
| 1242 | WDSP_ERR(wdsp, "Failed to add master, err = %d", ret); |
| 1243 | goto err_master_add; |
| 1244 | } |
| 1245 | |
| 1246 | return 0; |
| 1247 | |
| 1248 | err_master_add: |
| 1249 | mutex_destroy(&wdsp->api_mutex); |
| 1250 | mutex_destroy(&wdsp->ssr_mutex); |
| 1251 | err_dt_parse: |
| 1252 | devm_kfree(mdev, wdsp->seg_list); |
| 1253 | devm_kfree(mdev, wdsp); |
| 1254 | dev_set_drvdata(mdev, NULL); |
| 1255 | |
| 1256 | return ret; |
| 1257 | } |
| 1258 | |
| 1259 | static int wdsp_mgr_remove(struct platform_device *pdev) |
| 1260 | { |
| 1261 | struct device *mdev = &pdev->dev; |
| 1262 | struct wdsp_mgr_priv *wdsp = dev_get_drvdata(mdev); |
| 1263 | |
| 1264 | component_master_del(mdev, &wdsp_master_ops); |
| 1265 | |
| 1266 | mutex_destroy(&wdsp->api_mutex); |
| 1267 | mutex_destroy(&wdsp->ssr_mutex); |
| 1268 | devm_kfree(mdev, wdsp->seg_list); |
| 1269 | devm_kfree(mdev, wdsp); |
| 1270 | dev_set_drvdata(mdev, NULL); |
| 1271 | |
| 1272 | return 0; |
| 1273 | }; |
| 1274 | |
| 1275 | static const struct of_device_id wdsp_mgr_dt_match[] = { |
| 1276 | {.compatible = "qcom,wcd-dsp-mgr" }, |
| 1277 | { } |
| 1278 | }; |
| 1279 | |
| 1280 | static struct platform_driver wdsp_mgr_driver = { |
| 1281 | .driver = { |
| 1282 | .name = "wcd-dsp-mgr", |
| 1283 | .owner = THIS_MODULE, |
| 1284 | .of_match_table = of_match_ptr(wdsp_mgr_dt_match), |
| 1285 | }, |
| 1286 | .probe = wdsp_mgr_probe, |
| 1287 | .remove = wdsp_mgr_remove, |
| 1288 | }; |
| 1289 | |
| 1290 | int wcd_dsp_mgr_init(void) |
| 1291 | { |
| 1292 | return platform_driver_register(&wdsp_mgr_driver); |
| 1293 | } |
| 1294 | |
| 1295 | void wcd_dsp_mgr_exit(void) |
| 1296 | { |
| 1297 | platform_driver_unregister(&wdsp_mgr_driver); |
| 1298 | } |
| 1299 | |
| 1300 | MODULE_DESCRIPTION("WCD DSP manager driver"); |
| 1301 | MODULE_DEVICE_TABLE(of, wdsp_mgr_dt_match); |
| 1302 | MODULE_LICENSE("GPL v2"); |