Michael Adisumarta | f042482 | 2018-01-15 16:15:33 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -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 | |
| 13 | #include <linux/debugfs.h> |
| 14 | #include "ipa_pm.h" |
| 15 | #include "ipa_i.h" |
| 16 | |
| 17 | static const char *client_state_to_str[IPA_PM_STATE_MAX] = { |
| 18 | __stringify(IPA_PM_DEACTIVATED), |
| 19 | __stringify(IPA_PM_DEACTIVATE_IN_PROGRESS), |
| 20 | __stringify(IPA_PM_ACTIVATE_IN_PROGRESS), |
| 21 | __stringify(IPA_PM_ACTIVATED), |
| 22 | __stringify(IPA_PM_ACTIVATED_PENDING_DEACTIVATION), |
| 23 | __stringify(IPA_PM_ACTIVATED_TIMER_SET), |
| 24 | __stringify(IPA_PM_ACTIVATED_PENDING_RESCHEDULE), |
| 25 | }; |
| 26 | |
| 27 | static const char *ipa_pm_group_to_str[IPA_PM_GROUP_MAX] = { |
| 28 | __stringify(IPA_PM_GROUP_DEFAULT), |
| 29 | __stringify(IPA_PM_GROUP_APPS), |
| 30 | __stringify(IPA_PM_GROUP_MODEM), |
| 31 | }; |
| 32 | |
| 33 | |
| 34 | #define IPA_PM_DRV_NAME "ipa_pm" |
| 35 | |
| 36 | #define IPA_PM_DBG(fmt, args...) \ |
| 37 | do { \ |
| 38 | pr_debug(IPA_PM_DRV_NAME " %s:%d " fmt, \ |
| 39 | __func__, __LINE__, ## args); \ |
| 40 | IPA_IPC_LOGGING(ipa_get_ipc_logbuf(), \ |
| 41 | IPA_PM_DRV_NAME " %s:%d " fmt, ## args); \ |
| 42 | IPA_IPC_LOGGING(ipa_get_ipc_logbuf_low(), \ |
| 43 | IPA_PM_DRV_NAME " %s:%d " fmt, ## args); \ |
| 44 | } while (0) |
| 45 | #define IPA_PM_DBG_LOW(fmt, args...) \ |
| 46 | do { \ |
| 47 | pr_debug(IPA_PM_DRV_NAME " %s:%d " fmt, \ |
| 48 | __func__, __LINE__, ## args); \ |
| 49 | IPA_IPC_LOGGING(ipa_get_ipc_logbuf_low(), \ |
| 50 | IPA_PM_DRV_NAME " %s:%d " fmt, ## args); \ |
| 51 | } while (0) |
| 52 | #define IPA_PM_ERR(fmt, args...) \ |
| 53 | do { \ |
| 54 | pr_err(IPA_PM_DRV_NAME " %s:%d " fmt, \ |
| 55 | __func__, __LINE__, ## args); \ |
| 56 | IPA_IPC_LOGGING(ipa_get_ipc_logbuf(), \ |
| 57 | IPA_PM_DRV_NAME " %s:%d " fmt, ## args); \ |
| 58 | IPA_IPC_LOGGING(ipa_get_ipc_logbuf_low(), \ |
| 59 | IPA_PM_DRV_NAME " %s:%d " fmt, ## args); \ |
| 60 | } while (0) |
| 61 | #define IPA_PM_DBG_STATE(hdl, name, state) \ |
| 62 | IPA_PM_DBG_LOW("Client[%d] %s: %s\n", hdl, name, \ |
| 63 | client_state_to_str[state]) |
| 64 | |
| 65 | |
| 66 | #if IPA_PM_MAX_CLIENTS > 32 |
| 67 | #error max client greater than 32 all bitmask types should be changed |
| 68 | #endif |
| 69 | |
| 70 | /* |
| 71 | * struct ipa_pm_exception_list - holds information about an exception |
| 72 | * @pending: number of clients in exception that have not yet been adctivated |
| 73 | * @bitmask: bitmask of the clients in the exception based on handle |
| 74 | * @threshold: the threshold values for the exception |
| 75 | */ |
| 76 | struct ipa_pm_exception_list { |
| 77 | char clients[IPA_PM_MAX_EX_CL]; |
| 78 | int pending; |
| 79 | u32 bitmask; |
| 80 | int threshold[IPA_PM_THRESHOLD_MAX]; |
| 81 | }; |
| 82 | |
| 83 | /* |
| 84 | * struct clk_scaling_db - holds information about threshholds and exceptions |
| 85 | * @lock: lock the bitmasks and thresholds |
| 86 | * @exception_list: pointer to the list of exceptions |
| 87 | * @work: work for clock scaling algorithm |
| 88 | * @active_client_bitmask: the bits represent handles in the clients array that |
| 89 | * contain non-null client |
| 90 | * @threshold_size: size of the throughput threshold |
| 91 | * @exception_size: size of the exception list |
| 92 | * @cur_vote: idx of the threshold |
| 93 | * @default_threshold: the thresholds used if no exception passes |
| 94 | * @current_threshold: the current threshold of the clock plan |
| 95 | */ |
| 96 | struct clk_scaling_db { |
| 97 | spinlock_t lock; |
| 98 | struct ipa_pm_exception_list exception_list[IPA_PM_EXCEPTION_MAX]; |
| 99 | struct work_struct work; |
| 100 | u32 active_client_bitmask; |
| 101 | int threshold_size; |
| 102 | int exception_size; |
| 103 | int cur_vote; |
| 104 | int default_threshold[IPA_PM_THRESHOLD_MAX]; |
| 105 | int *current_threshold; |
| 106 | }; |
| 107 | |
| 108 | /* |
| 109 | * ipa_pm state names |
| 110 | * |
| 111 | * Timer free states: |
| 112 | * @IPA_PM_DEACTIVATED: client starting state when registered |
| 113 | * @IPA_PM_DEACTIVATE_IN_PROGRESS: deactivate was called in progress of a client |
| 114 | * activating |
| 115 | * @IPA_PM_ACTIVATE_IN_PROGRESS: client is being activated by work_queue |
| 116 | * @IPA_PM_ACTIVATED: client is activated without any timers |
| 117 | * |
| 118 | * Timer set states: |
| 119 | * @IPA_PM_ACTIVATED_PENDING_DEACTIVATION: moves to deactivate once timer pass |
| 120 | * @IPA_PM_ACTIVATED_TIMER_SET: client was activated while timer was set, so |
| 121 | * when the timer pass, client will still be activated |
| 122 | *@IPA_PM_ACTIVATED_PENDING_RESCHEDULE: state signifying extended timer when |
| 123 | * a client is deferred_deactivated when a time ris still active |
| 124 | */ |
| 125 | enum ipa_pm_state { |
| 126 | IPA_PM_DEACTIVATED, |
| 127 | IPA_PM_DEACTIVATE_IN_PROGRESS, |
| 128 | IPA_PM_ACTIVATE_IN_PROGRESS, |
| 129 | IPA_PM_ACTIVATED, |
| 130 | IPA_PM_ACTIVATED_PENDING_DEACTIVATION, |
| 131 | IPA_PM_ACTIVATED_TIMER_SET, |
| 132 | IPA_PM_ACTIVATED_PENDING_RESCHEDULE, |
| 133 | }; |
| 134 | |
| 135 | #define IPA_PM_STATE_ACTIVE(state) \ |
| 136 | (state == IPA_PM_ACTIVATED ||\ |
| 137 | state == IPA_PM_ACTIVATED_PENDING_DEACTIVATION ||\ |
| 138 | state == IPA_PM_ACTIVATED_TIMER_SET ||\ |
| 139 | state == IPA_PM_ACTIVATED_PENDING_RESCHEDULE) |
| 140 | |
| 141 | #define IPA_PM_STATE_IN_PROGRESS(state) \ |
| 142 | (state == IPA_PM_ACTIVATE_IN_PROGRESS \ |
| 143 | || state == IPA_PM_DEACTIVATE_IN_PROGRESS) |
| 144 | |
| 145 | /* |
| 146 | * struct ipa_pm_client - holds information about a specific IPA client |
| 147 | * @name: string name of the client |
| 148 | * @callback: pointer to the client's callback function |
| 149 | * @callback_params: pointer to the client's callback parameters |
| 150 | * @state: Activation state of the client |
| 151 | * @skip_clk_vote: 0 if client votes for clock when activated, 1 if no vote |
| 152 | * @group: the ipa_pm_group the client belongs to |
| 153 | * @hdl: handle of the client |
| 154 | * @throughput: the throughput of the client for clock scaling |
| 155 | * @state_lock: spinlock to lock the pm_states |
| 156 | * @activate_work: work for activate (blocking case) |
| 157 | * @deactivate work: delayed work for deferred_deactivate function |
| 158 | * @complete: generic wait-for-completion handler |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 159 | * @wlock: wake source to prevent AP suspend |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 160 | */ |
| 161 | struct ipa_pm_client { |
| 162 | char name[IPA_PM_MAX_EX_CL]; |
| 163 | void (*callback)(void*, enum ipa_pm_cb_event); |
| 164 | void *callback_params; |
| 165 | enum ipa_pm_state state; |
| 166 | bool skip_clk_vote; |
| 167 | int group; |
| 168 | int hdl; |
| 169 | int throughput; |
| 170 | spinlock_t state_lock; |
| 171 | struct work_struct activate_work; |
| 172 | struct delayed_work deactivate_work; |
| 173 | struct completion complete; |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 174 | struct wakeup_source wlock; |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 175 | }; |
| 176 | |
| 177 | /* |
| 178 | * struct ipa_pm_ctx - global ctx that will hold the client arrays and tput info |
| 179 | * @clients: array to the clients with the handle as its index |
| 180 | * @clients_by_pipe: array to the clients with endpoint as the index |
| 181 | * @wq: work queue for deferred deactivate, activate, and clk_scaling work |
| 182 | 8 @clk_scaling: pointer to clock scaling database |
| 183 | * @client_mutex: global mutex to lock the client arrays |
| 184 | * @aggragated_tput: aggragated tput value of all valid activated clients |
| 185 | * @group_tput: combined throughput for the groups |
| 186 | */ |
| 187 | struct ipa_pm_ctx { |
| 188 | struct ipa_pm_client *clients[IPA_PM_MAX_CLIENTS]; |
| 189 | struct ipa_pm_client *clients_by_pipe[IPA3_MAX_NUM_PIPES]; |
| 190 | struct workqueue_struct *wq; |
| 191 | struct clk_scaling_db clk_scaling; |
| 192 | struct mutex client_mutex; |
| 193 | int aggregated_tput; |
| 194 | int group_tput[IPA_PM_GROUP_MAX]; |
| 195 | }; |
| 196 | |
| 197 | static struct ipa_pm_ctx *ipa_pm_ctx; |
| 198 | |
| 199 | /** |
| 200 | * pop_max_from_array() -pop the max and move the last element to where the |
| 201 | * max was popped |
| 202 | * @arr: array to be searched for max |
| 203 | * @n: size of the array |
| 204 | * |
| 205 | * Returns: max value of the array |
| 206 | */ |
| 207 | static int pop_max_from_array(int *arr, int *n) |
| 208 | { |
| 209 | int i; |
| 210 | int max, max_idx; |
| 211 | |
| 212 | max_idx = *n - 1; |
| 213 | max = 0; |
| 214 | |
| 215 | if (*n == 0) |
| 216 | return 0; |
| 217 | |
| 218 | for (i = 0; i < *n; i++) { |
| 219 | if (arr[i] > max) { |
| 220 | max = arr[i]; |
| 221 | max_idx = i; |
| 222 | } |
| 223 | } |
| 224 | (*n)--; |
| 225 | arr[max_idx] = arr[*n]; |
| 226 | |
| 227 | return max; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * calculate_throughput() - calculate the aggregated throughput |
| 232 | * based on active clients |
| 233 | * |
| 234 | * Returns: aggregated tput value |
| 235 | */ |
| 236 | static int calculate_throughput(void) |
| 237 | { |
| 238 | int client_tput[IPA_PM_MAX_CLIENTS] = { 0 }; |
| 239 | bool group_voted[IPA_PM_GROUP_MAX] = { false }; |
| 240 | int i, n; |
| 241 | int max, second_max, aggregated_tput; |
| 242 | struct ipa_pm_client *client; |
| 243 | |
| 244 | /* Create a basic array to hold throughputs*/ |
Michael Adisumarta | f042482 | 2018-01-15 16:15:33 -0800 | [diff] [blame] | 245 | for (i = 1, n = 0; i < IPA_PM_MAX_CLIENTS; i++) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 246 | client = ipa_pm_ctx->clients[i]; |
| 247 | if (client != NULL && IPA_PM_STATE_ACTIVE(client->state)) { |
| 248 | /* default case */ |
| 249 | if (client->group == IPA_PM_GROUP_DEFAULT) { |
| 250 | client_tput[n++] = client->throughput; |
| 251 | } else if (group_voted[client->group] == false) { |
| 252 | client_tput[n++] = ipa_pm_ctx->group_tput |
| 253 | [client->group]; |
| 254 | group_voted[client->group] = true; |
| 255 | } |
| 256 | } |
| 257 | } |
| 258 | /*the array will only use n+1 spots. n will be the last index used*/ |
| 259 | |
| 260 | aggregated_tput = 0; |
| 261 | |
| 262 | /** |
| 263 | * throughput algorithm: |
| 264 | * 1) pop the max and second_max |
| 265 | * 2) add the 2nd max to aggregated tput |
| 266 | * 3) insert the value of max - 2nd max |
| 267 | * 4) repeat until array is of size 1 |
| 268 | */ |
| 269 | while (n > 1) { |
| 270 | max = pop_max_from_array(client_tput, &n); |
| 271 | second_max = pop_max_from_array(client_tput, &n); |
| 272 | client_tput[n++] = max - second_max; |
| 273 | aggregated_tput += second_max; |
| 274 | } |
| 275 | |
| 276 | IPA_PM_DBG_LOW("Aggregated throughput: %d\n", aggregated_tput); |
| 277 | |
| 278 | return aggregated_tput; |
| 279 | } |
| 280 | |
| 281 | /** |
| 282 | * deactivate_client() - turn off the bit in the active client bitmask based on |
| 283 | * the handle passed in |
| 284 | * @hdl: The index of the client to be deactivated |
| 285 | */ |
| 286 | static void deactivate_client(u32 hdl) |
| 287 | { |
| 288 | unsigned long flags; |
| 289 | |
| 290 | spin_lock_irqsave(&ipa_pm_ctx->clk_scaling.lock, flags); |
| 291 | ipa_pm_ctx->clk_scaling.active_client_bitmask &= ~(1 << hdl); |
| 292 | spin_unlock_irqrestore(&ipa_pm_ctx->clk_scaling.lock, flags); |
| 293 | IPA_PM_DBG_LOW("active bitmask: %x\n", |
| 294 | ipa_pm_ctx->clk_scaling.active_client_bitmask); |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * activate_client() - turn on the bit in the active client bitmask based on |
| 299 | * the handle passed in |
| 300 | * @hdl: The index of the client to be activated |
| 301 | */ |
| 302 | static void activate_client(u32 hdl) |
| 303 | { |
| 304 | unsigned long flags; |
| 305 | |
| 306 | spin_lock_irqsave(&ipa_pm_ctx->clk_scaling.lock, flags); |
| 307 | ipa_pm_ctx->clk_scaling.active_client_bitmask |= (1 << hdl); |
| 308 | spin_unlock_irqrestore(&ipa_pm_ctx->clk_scaling.lock, flags); |
| 309 | IPA_PM_DBG_LOW("active bitmask: %x\n", |
| 310 | ipa_pm_ctx->clk_scaling.active_client_bitmask); |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * deactivate_client() - get threshold |
| 315 | * |
| 316 | * Returns: threshold of the exception that passes or default if none pass |
| 317 | */ |
| 318 | static void set_current_threshold(void) |
| 319 | { |
| 320 | int i; |
| 321 | struct clk_scaling_db *clk; |
| 322 | struct ipa_pm_exception_list *exception; |
| 323 | unsigned long flags; |
| 324 | |
| 325 | clk = &ipa_pm_ctx->clk_scaling; |
| 326 | |
| 327 | spin_lock_irqsave(&ipa_pm_ctx->clk_scaling.lock, flags); |
| 328 | for (i = 0; i < clk->exception_size; i++) { |
| 329 | exception = &clk->exception_list[i]; |
| 330 | if (exception->pending == 0 && (exception->bitmask |
| 331 | & ~clk->active_client_bitmask) == 0) { |
| 332 | spin_unlock_irqrestore(&ipa_pm_ctx->clk_scaling.lock, |
| 333 | flags); |
| 334 | clk->current_threshold = exception->threshold; |
| 335 | IPA_PM_DBG("Exception %d set\n", i); |
| 336 | return; |
| 337 | } |
| 338 | } |
| 339 | clk->current_threshold = clk->default_threshold; |
| 340 | spin_unlock_irqrestore(&ipa_pm_ctx->clk_scaling.lock, flags); |
| 341 | } |
| 342 | |
| 343 | /** |
| 344 | * do_clk_scaling() - set the clock based on the activated clients |
| 345 | * |
| 346 | * Returns: 0 if success, negative otherwise |
| 347 | */ |
| 348 | static int do_clk_scaling(void) |
| 349 | { |
| 350 | int i, tput; |
| 351 | int new_th_idx = 1; |
| 352 | struct clk_scaling_db *clk_scaling; |
| 353 | |
| 354 | clk_scaling = &ipa_pm_ctx->clk_scaling; |
| 355 | |
| 356 | mutex_lock(&ipa_pm_ctx->client_mutex); |
Michael Adisumarta | 03f3ab6 | 2017-12-20 15:26:49 -0800 | [diff] [blame] | 357 | IPA_PM_DBG_LOW("clock scaling started\n"); |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 358 | tput = calculate_throughput(); |
| 359 | ipa_pm_ctx->aggregated_tput = tput; |
| 360 | set_current_threshold(); |
| 361 | |
| 362 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 363 | |
| 364 | for (i = 0; i < clk_scaling->threshold_size; i++) { |
| 365 | if (tput > clk_scaling->current_threshold[i]) |
| 366 | new_th_idx++; |
| 367 | } |
| 368 | |
Michael Adisumarta | 03f3ab6 | 2017-12-20 15:26:49 -0800 | [diff] [blame] | 369 | IPA_PM_DBG_LOW("old idx was at %d\n", ipa_pm_ctx->clk_scaling.cur_vote); |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 370 | |
| 371 | |
| 372 | if (ipa_pm_ctx->clk_scaling.cur_vote != new_th_idx) { |
| 373 | ipa_pm_ctx->clk_scaling.cur_vote = new_th_idx; |
| 374 | ipa3_set_clock_plan_from_pm(ipa_pm_ctx->clk_scaling.cur_vote); |
| 375 | } |
| 376 | |
Michael Adisumarta | 03f3ab6 | 2017-12-20 15:26:49 -0800 | [diff] [blame] | 377 | IPA_PM_DBG_LOW("new idx is at %d\n", ipa_pm_ctx->clk_scaling.cur_vote); |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 378 | |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | /** |
| 383 | * clock_scaling_func() - set the clock on a work queue |
| 384 | */ |
| 385 | static void clock_scaling_func(struct work_struct *work) |
| 386 | { |
| 387 | do_clk_scaling(); |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * activate_work_func - activate a client and vote for clock on a work queue |
| 392 | */ |
| 393 | static void activate_work_func(struct work_struct *work) |
| 394 | { |
| 395 | struct ipa_pm_client *client; |
| 396 | bool dec_clk = false; |
| 397 | unsigned long flags; |
| 398 | |
| 399 | client = container_of(work, struct ipa_pm_client, activate_work); |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 400 | if (!client->skip_clk_vote) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 401 | IPA_ACTIVE_CLIENTS_INC_SPECIAL(client->name); |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 402 | if (client->group == IPA_PM_GROUP_APPS) |
| 403 | __pm_stay_awake(&client->wlock); |
| 404 | } |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 405 | |
| 406 | spin_lock_irqsave(&client->state_lock, flags); |
| 407 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 408 | if (client->state == IPA_PM_ACTIVATE_IN_PROGRESS) { |
| 409 | client->state = IPA_PM_ACTIVATED; |
| 410 | } else if (client->state == IPA_PM_DEACTIVATE_IN_PROGRESS) { |
| 411 | client->state = IPA_PM_DEACTIVATED; |
| 412 | dec_clk = true; |
| 413 | } else { |
| 414 | IPA_PM_ERR("unexpected state %d\n", client->state); |
| 415 | WARN_ON(1); |
| 416 | } |
| 417 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 418 | |
| 419 | complete_all(&client->complete); |
| 420 | |
| 421 | if (dec_clk) { |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 422 | if (!client->skip_clk_vote) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 423 | IPA_ACTIVE_CLIENTS_DEC_SPECIAL(client->name); |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 424 | if (client->group == IPA_PM_GROUP_APPS) |
| 425 | __pm_relax(&client->wlock); |
| 426 | } |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 427 | |
| 428 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 429 | return; |
| 430 | } |
| 431 | |
| 432 | activate_client(client->hdl); |
| 433 | |
| 434 | mutex_lock(&ipa_pm_ctx->client_mutex); |
Michael Adisumarta | ce75fc7 | 2017-10-04 11:42:11 -0700 | [diff] [blame] | 435 | if (client->callback) { |
| 436 | client->callback(client->callback_params, |
| 437 | IPA_PM_CLIENT_ACTIVATED); |
| 438 | } else { |
| 439 | IPA_PM_ERR("client has no callback"); |
| 440 | WARN_ON(1); |
| 441 | } |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 442 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 443 | |
| 444 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 445 | do_clk_scaling(); |
| 446 | } |
| 447 | |
| 448 | /** |
| 449 | * delayed_deferred_deactivate_work_func - deferred deactivate on a work queue |
| 450 | */ |
| 451 | static void delayed_deferred_deactivate_work_func(struct work_struct *work) |
| 452 | { |
| 453 | struct delayed_work *dwork; |
| 454 | struct ipa_pm_client *client; |
| 455 | unsigned long flags; |
| 456 | |
| 457 | dwork = container_of(work, struct delayed_work, work); |
| 458 | client = container_of(dwork, struct ipa_pm_client, deactivate_work); |
| 459 | |
| 460 | spin_lock_irqsave(&client->state_lock, flags); |
| 461 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 462 | switch (client->state) { |
| 463 | case IPA_PM_ACTIVATED_TIMER_SET: |
| 464 | client->state = IPA_PM_ACTIVATED; |
| 465 | goto bail; |
| 466 | case IPA_PM_ACTIVATED_PENDING_RESCHEDULE: |
| 467 | queue_delayed_work(ipa_pm_ctx->wq, &client->deactivate_work, |
| 468 | msecs_to_jiffies(IPA_PM_DEFERRED_TIMEOUT)); |
| 469 | client->state = IPA_PM_ACTIVATED_PENDING_DEACTIVATION; |
| 470 | goto bail; |
| 471 | case IPA_PM_ACTIVATED_PENDING_DEACTIVATION: |
| 472 | client->state = IPA_PM_DEACTIVATED; |
| 473 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 474 | spin_unlock_irqrestore(&client->state_lock, flags); |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 475 | if (!client->skip_clk_vote) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 476 | IPA_ACTIVE_CLIENTS_DEC_SPECIAL(client->name); |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 477 | if (client->group == IPA_PM_GROUP_APPS) |
| 478 | __pm_relax(&client->wlock); |
| 479 | } |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 480 | |
| 481 | deactivate_client(client->hdl); |
| 482 | do_clk_scaling(); |
| 483 | return; |
| 484 | default: |
| 485 | IPA_PM_ERR("unexpected state %d\n", client->state); |
| 486 | WARN_ON(1); |
| 487 | goto bail; |
| 488 | } |
| 489 | |
| 490 | bail: |
| 491 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 492 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 493 | } |
| 494 | |
| 495 | static int find_next_open_array_element(const char *name) |
| 496 | { |
| 497 | int i, n; |
| 498 | |
| 499 | n = -ENOBUFS; |
| 500 | |
Michael Adisumarta | f042482 | 2018-01-15 16:15:33 -0800 | [diff] [blame] | 501 | /* 0 is not a valid handle */ |
| 502 | for (i = IPA_PM_MAX_CLIENTS - 1; i >= 1; i--) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 503 | if (ipa_pm_ctx->clients[i] == NULL) { |
| 504 | n = i; |
| 505 | continue; |
| 506 | } |
| 507 | |
| 508 | if (strlen(name) == strlen(ipa_pm_ctx->clients[i]->name)) |
| 509 | if (!strcmp(name, ipa_pm_ctx->clients[i]->name)) |
| 510 | return -EEXIST; |
| 511 | } |
| 512 | return n; |
| 513 | } |
| 514 | |
| 515 | /** |
| 516 | * add_client_to_exception_list() - add client to the exception list and |
| 517 | * update pending if necessary |
| 518 | * @hdl: index of the IPA client |
| 519 | * |
| 520 | * Returns: 0 if success, negative otherwise |
| 521 | */ |
| 522 | static int add_client_to_exception_list(u32 hdl) |
| 523 | { |
| 524 | int i; |
| 525 | struct ipa_pm_exception_list *exception; |
| 526 | |
| 527 | mutex_lock(&ipa_pm_ctx->client_mutex); |
| 528 | for (i = 0; i < ipa_pm_ctx->clk_scaling.exception_size; i++) { |
| 529 | exception = &ipa_pm_ctx->clk_scaling.exception_list[i]; |
| 530 | if (strnstr(exception->clients, ipa_pm_ctx->clients[hdl]->name, |
| 531 | strlen(exception->clients))) { |
| 532 | exception->pending--; |
| 533 | |
| 534 | if (exception->pending < 0) { |
| 535 | WARN_ON(1); |
| 536 | exception->pending = 0; |
| 537 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 538 | return -EPERM; |
| 539 | } |
| 540 | exception->bitmask |= (1 << hdl); |
| 541 | } |
| 542 | } |
| 543 | IPA_PM_DBG("%s added to exception list\n", |
| 544 | ipa_pm_ctx->clients[hdl]->name); |
| 545 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 546 | |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | /** |
| 551 | * remove_client_to_exception_list() - remove client from the exception list and |
| 552 | * update pending if necessary |
| 553 | * @hdl: index of the IPA client |
| 554 | * |
| 555 | * Returns: 0 if success, negative otherwise |
| 556 | */ |
| 557 | static int remove_client_from_exception_list(u32 hdl) |
| 558 | { |
| 559 | int i; |
| 560 | struct ipa_pm_exception_list *exception; |
| 561 | |
| 562 | for (i = 0; i < ipa_pm_ctx->clk_scaling.exception_size; i++) { |
| 563 | exception = &ipa_pm_ctx->clk_scaling.exception_list[i]; |
| 564 | if (exception->bitmask & (1 << hdl)) { |
| 565 | exception->pending++; |
| 566 | exception->bitmask &= ~(1 << hdl); |
| 567 | } |
| 568 | } |
| 569 | IPA_PM_DBG("Client %d removed from exception list\n", hdl); |
| 570 | |
| 571 | return 0; |
| 572 | } |
| 573 | |
| 574 | /** |
| 575 | * ipa_pm_init() - initialize IPA PM Components |
| 576 | * @ipa_pm_init_params: parameters needed to fill exceptions and thresholds |
| 577 | * |
| 578 | * Returns: 0 on success, negative on failure |
| 579 | */ |
| 580 | int ipa_pm_init(struct ipa_pm_init_params *params) |
| 581 | { |
| 582 | int i, j; |
| 583 | struct clk_scaling_db *clk_scaling; |
| 584 | |
| 585 | if (params == NULL) { |
| 586 | IPA_PM_ERR("Invalid Params\n"); |
| 587 | return -EINVAL; |
| 588 | } |
| 589 | |
| 590 | if (params->threshold_size <= 0 |
| 591 | || params->threshold_size > IPA_PM_THRESHOLD_MAX) { |
| 592 | IPA_PM_ERR("Invalid threshold size\n"); |
| 593 | return -EINVAL; |
| 594 | } |
| 595 | |
| 596 | if (params->exception_size < 0 |
| 597 | || params->exception_size > IPA_PM_EXCEPTION_MAX) { |
| 598 | IPA_PM_ERR("Invalid exception size\n"); |
| 599 | return -EINVAL; |
| 600 | } |
| 601 | |
| 602 | IPA_PM_DBG("IPA PM initialization started\n"); |
| 603 | |
| 604 | if (ipa_pm_ctx != NULL) { |
| 605 | IPA_PM_ERR("Already initialized\n"); |
| 606 | return -EPERM; |
| 607 | } |
| 608 | |
| 609 | |
| 610 | ipa_pm_ctx = kzalloc(sizeof(*ipa_pm_ctx), GFP_KERNEL); |
| 611 | if (!ipa_pm_ctx) { |
| 612 | IPA_PM_ERR(":kzalloc err.\n"); |
| 613 | return -ENOMEM; |
| 614 | } |
| 615 | |
| 616 | ipa_pm_ctx->wq = create_singlethread_workqueue("ipa_pm_activate"); |
| 617 | if (!ipa_pm_ctx->wq) { |
| 618 | IPA_PM_ERR("create workqueue failed\n"); |
| 619 | kfree(ipa_pm_ctx); |
| 620 | return -ENOMEM; |
| 621 | } |
| 622 | |
| 623 | mutex_init(&ipa_pm_ctx->client_mutex); |
| 624 | |
| 625 | /* Populate and init locks in clk_scaling_db */ |
| 626 | clk_scaling = &ipa_pm_ctx->clk_scaling; |
| 627 | spin_lock_init(&clk_scaling->lock); |
| 628 | clk_scaling->threshold_size = params->threshold_size; |
| 629 | clk_scaling->exception_size = params->exception_size; |
| 630 | INIT_WORK(&clk_scaling->work, clock_scaling_func); |
| 631 | |
| 632 | for (i = 0; i < params->threshold_size; i++) |
| 633 | clk_scaling->default_threshold[i] = |
| 634 | params->default_threshold[i]; |
| 635 | |
| 636 | /* Populate exception list*/ |
| 637 | for (i = 0; i < params->exception_size; i++) { |
| 638 | strlcpy(clk_scaling->exception_list[i].clients, |
| 639 | params->exceptions[i].usecase, IPA_PM_MAX_EX_CL); |
| 640 | IPA_PM_DBG("Usecase: %s\n", params->exceptions[i].usecase); |
| 641 | |
| 642 | /* Parse the commas to count the size of the clients */ |
| 643 | for (j = 0; j < IPA_PM_MAX_EX_CL && |
| 644 | clk_scaling->exception_list[i].clients[j]; j++) { |
| 645 | if (clk_scaling->exception_list[i].clients[j] == ',') |
| 646 | clk_scaling->exception_list[i].pending++; |
| 647 | } |
| 648 | |
| 649 | clk_scaling->exception_list[i].pending++; |
| 650 | IPA_PM_DBG("Pending: %d\n", clk_scaling-> |
| 651 | exception_list[i].pending); |
| 652 | |
| 653 | /* populate the threshold */ |
| 654 | for (j = 0; j < params->threshold_size; j++) { |
| 655 | clk_scaling->exception_list[i].threshold[j] |
| 656 | = params->exceptions[i].threshold[j]; |
| 657 | } |
| 658 | |
| 659 | } |
| 660 | IPA_PM_DBG("initialization success"); |
| 661 | |
| 662 | return 0; |
| 663 | } |
| 664 | |
| 665 | int ipa_pm_destroy(void) |
| 666 | { |
| 667 | IPA_PM_DBG("IPA PM destroy started\n"); |
| 668 | |
| 669 | if (ipa_pm_ctx == NULL) { |
| 670 | IPA_PM_ERR("Already destroyed\n"); |
| 671 | return -EPERM; |
| 672 | } |
| 673 | |
| 674 | destroy_workqueue(ipa_pm_ctx->wq); |
| 675 | |
| 676 | kfree(ipa_pm_ctx); |
| 677 | ipa_pm_ctx = NULL; |
| 678 | |
| 679 | return 0; |
| 680 | } |
| 681 | |
| 682 | /** |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 683 | * ipa_pm_register() - register an IPA PM client with the PM |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 684 | * @register_params: params for a client like throughput, callback, etc. |
| 685 | * @hdl: int pointer that will be used as an index to access the client |
| 686 | * |
| 687 | * Returns: 0 on success, negative on failure |
| 688 | * |
| 689 | * Side effects: *hdl is replaced with the client index or -EEXIST if |
| 690 | * client is already registered |
| 691 | */ |
| 692 | int ipa_pm_register(struct ipa_pm_register_params *params, u32 *hdl) |
| 693 | { |
| 694 | struct ipa_pm_client *client; |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 695 | struct wakeup_source *wlock; |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 696 | |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 697 | if (ipa_pm_ctx == NULL) { |
| 698 | IPA_PM_ERR("PM_ctx is null\n"); |
| 699 | return -EINVAL; |
| 700 | } |
| 701 | |
Michael Adisumarta | ce75fc7 | 2017-10-04 11:42:11 -0700 | [diff] [blame] | 702 | if (params == NULL || hdl == NULL || params->name == NULL) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 703 | IPA_PM_ERR("Invalid Params\n"); |
| 704 | return -EINVAL; |
| 705 | } |
| 706 | |
| 707 | IPA_PM_DBG("IPA PM registering client\n"); |
| 708 | |
| 709 | mutex_lock(&ipa_pm_ctx->client_mutex); |
| 710 | |
| 711 | *hdl = find_next_open_array_element(params->name); |
| 712 | |
| 713 | if (*hdl > IPA_CLIENT_MAX) { |
| 714 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 715 | IPA_PM_ERR("client is already registered or array is full\n"); |
| 716 | return *hdl; |
| 717 | } |
| 718 | |
| 719 | ipa_pm_ctx->clients[*hdl] = kzalloc(sizeof |
| 720 | (struct ipa_pm_client), GFP_KERNEL); |
| 721 | if (!ipa_pm_ctx->clients[*hdl]) { |
| 722 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 723 | IPA_PM_ERR(":kzalloc err.\n"); |
| 724 | return -ENOMEM; |
| 725 | } |
| 726 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 727 | |
| 728 | client = ipa_pm_ctx->clients[*hdl]; |
| 729 | |
| 730 | spin_lock_init(&client->state_lock); |
| 731 | |
| 732 | INIT_DELAYED_WORK(&client->deactivate_work, |
| 733 | delayed_deferred_deactivate_work_func); |
| 734 | |
| 735 | INIT_WORK(&client->activate_work, activate_work_func); |
| 736 | |
| 737 | /* populate fields */ |
| 738 | strlcpy(client->name, params->name, IPA_PM_MAX_EX_CL); |
| 739 | client->callback = params->callback; |
| 740 | client->callback_params = params->user_data; |
| 741 | client->group = params->group; |
| 742 | client->hdl = *hdl; |
| 743 | client->skip_clk_vote = params->skip_clk_vote; |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 744 | wlock = &client->wlock; |
| 745 | wakeup_source_init(wlock, client->name); |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 746 | |
| 747 | /* add client to exception list */ |
| 748 | if (add_client_to_exception_list(*hdl)) { |
| 749 | ipa_pm_deregister(*hdl); |
| 750 | IPA_PM_ERR("Fail to add client to exception_list\n"); |
| 751 | return -EPERM; |
| 752 | } |
| 753 | |
| 754 | IPA_PM_DBG("IPA PM client registered with handle %d\n", *hdl); |
| 755 | return 0; |
| 756 | } |
| 757 | |
| 758 | /** |
| 759 | * ipa_pm_deregister() - deregister IPA client from the PM |
| 760 | * @hdl: index of the client in the array |
| 761 | * |
| 762 | * Returns: 0 on success, negative on failure |
| 763 | */ |
| 764 | int ipa_pm_deregister(u32 hdl) |
| 765 | { |
| 766 | struct ipa_pm_client *client; |
| 767 | int i; |
| 768 | unsigned long flags; |
| 769 | |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 770 | if (ipa_pm_ctx == NULL) { |
| 771 | IPA_PM_ERR("PM_ctx is null\n"); |
| 772 | return -EINVAL; |
| 773 | } |
| 774 | |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 775 | if (hdl >= IPA_PM_MAX_CLIENTS) { |
| 776 | IPA_PM_ERR("Invalid Param\n"); |
| 777 | return -EINVAL; |
| 778 | } |
| 779 | |
| 780 | if (ipa_pm_ctx->clients[hdl] == NULL) { |
| 781 | IPA_PM_ERR("Client is Null\n"); |
| 782 | return -EINVAL; |
| 783 | } |
| 784 | |
| 785 | IPA_PM_DBG("IPA PM deregistering client\n"); |
| 786 | |
| 787 | client = ipa_pm_ctx->clients[hdl]; |
| 788 | spin_lock_irqsave(&client->state_lock, flags); |
| 789 | if (IPA_PM_STATE_IN_PROGRESS(client->state)) { |
| 790 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 791 | wait_for_completion(&client->complete); |
| 792 | spin_lock_irqsave(&client->state_lock, flags); |
| 793 | } |
| 794 | |
| 795 | if (IPA_PM_STATE_ACTIVE(client->state)) { |
| 796 | IPA_PM_DBG("Activated clients cannot be deregistered"); |
| 797 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 798 | return -EPERM; |
| 799 | } |
| 800 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 801 | |
| 802 | mutex_lock(&ipa_pm_ctx->client_mutex); |
| 803 | |
| 804 | /* nullify pointers in pipe array */ |
| 805 | for (i = 0; i < IPA3_MAX_NUM_PIPES; i++) { |
| 806 | if (ipa_pm_ctx->clients_by_pipe[i] == ipa_pm_ctx->clients[hdl]) |
| 807 | ipa_pm_ctx->clients_by_pipe[i] = NULL; |
| 808 | } |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 809 | wakeup_source_trash(&client->wlock); |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 810 | kfree(client); |
| 811 | ipa_pm_ctx->clients[hdl] = NULL; |
| 812 | |
| 813 | remove_client_from_exception_list(hdl); |
| 814 | IPA_PM_DBG("IPA PM client %d deregistered\n", hdl); |
| 815 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 816 | |
| 817 | return 0; |
| 818 | } |
| 819 | |
| 820 | /** |
| 821 | * ipa_pm_associate_ipa_cons_to_client() - add mapping to pipe with ipa cllent |
| 822 | * @hdl: index of the client to be mapped |
| 823 | * @consumer: the pipe/consumer name to be pipped to the client |
| 824 | * |
| 825 | * Returns: 0 on success, negative on failure |
| 826 | * |
| 827 | * Side effects: multiple pipes are allowed to be mapped to a single client |
| 828 | */ |
| 829 | int ipa_pm_associate_ipa_cons_to_client(u32 hdl, enum ipa_client_type consumer) |
| 830 | { |
| 831 | int idx; |
| 832 | |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 833 | if (ipa_pm_ctx == NULL) { |
| 834 | IPA_PM_ERR("PM_ctx is null\n"); |
| 835 | return -EINVAL; |
| 836 | } |
| 837 | |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 838 | if (hdl >= IPA_PM_MAX_CLIENTS || consumer < 0 || |
| 839 | consumer >= IPA_CLIENT_MAX) { |
| 840 | IPA_PM_ERR("invalid params\n"); |
| 841 | return -EINVAL; |
| 842 | } |
| 843 | |
| 844 | mutex_lock(&ipa_pm_ctx->client_mutex); |
| 845 | idx = ipa_get_ep_mapping(consumer); |
| 846 | |
| 847 | IPA_PM_DBG("Mapping pipe %d to client %d\n", idx, hdl); |
| 848 | |
| 849 | if (idx < 0) { |
| 850 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 851 | IPA_PM_DBG("Pipe is not used\n"); |
| 852 | return 0; |
| 853 | } |
| 854 | |
| 855 | if (ipa_pm_ctx->clients[hdl] == NULL) { |
| 856 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 857 | IPA_PM_ERR("Client is NULL\n"); |
| 858 | return -EPERM; |
| 859 | } |
| 860 | |
| 861 | if (ipa_pm_ctx->clients_by_pipe[idx] != NULL) { |
| 862 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 863 | IPA_PM_ERR("Pipe is already mapped\n"); |
| 864 | return -EPERM; |
| 865 | } |
| 866 | ipa_pm_ctx->clients_by_pipe[idx] = ipa_pm_ctx->clients[hdl]; |
| 867 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 868 | |
| 869 | IPA_PM_DBG("Pipe %d is mapped to client %d\n", idx, hdl); |
| 870 | |
| 871 | return 0; |
| 872 | } |
| 873 | |
| 874 | static int ipa_pm_activate_helper(struct ipa_pm_client *client, bool sync) |
| 875 | { |
| 876 | struct ipa_active_client_logging_info log_info; |
| 877 | int result = 0; |
| 878 | unsigned long flags; |
| 879 | |
| 880 | spin_lock_irqsave(&client->state_lock, flags); |
| 881 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 882 | |
| 883 | if (IPA_PM_STATE_IN_PROGRESS(client->state)) { |
| 884 | if (sync) { |
| 885 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 886 | wait_for_completion(&client->complete); |
| 887 | spin_lock_irqsave(&client->state_lock, flags); |
| 888 | } else { |
| 889 | client->state = IPA_PM_ACTIVATE_IN_PROGRESS; |
| 890 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 891 | return -EINPROGRESS; |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | switch (client->state) { |
| 896 | case IPA_PM_ACTIVATED_PENDING_RESCHEDULE: |
| 897 | case IPA_PM_ACTIVATED_PENDING_DEACTIVATION: |
| 898 | client->state = IPA_PM_ACTIVATED_TIMER_SET; |
| 899 | case IPA_PM_ACTIVATED: |
| 900 | case IPA_PM_ACTIVATED_TIMER_SET: |
| 901 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 902 | return 0; |
| 903 | case IPA_PM_DEACTIVATED: |
| 904 | break; |
| 905 | default: |
| 906 | IPA_PM_ERR("Invalid State\n"); |
| 907 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 908 | return -EPERM; |
| 909 | } |
| 910 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 911 | |
| 912 | IPA_ACTIVE_CLIENTS_PREP_SPECIAL(log_info, client->name); |
| 913 | if (!client->skip_clk_vote) { |
| 914 | if (sync) { |
| 915 | client->state = IPA_PM_ACTIVATE_IN_PROGRESS; |
| 916 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 917 | IPA_ACTIVE_CLIENTS_INC_SPECIAL(client->name); |
| 918 | spin_lock_irqsave(&client->state_lock, flags); |
| 919 | } else |
| 920 | result = ipa3_inc_client_enable_clks_no_block |
| 921 | (&log_info); |
| 922 | } |
| 923 | |
| 924 | /* we got the clocks */ |
| 925 | if (result == 0) { |
| 926 | client->state = IPA_PM_ACTIVATED; |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 927 | if (client->group == IPA_PM_GROUP_APPS) |
| 928 | __pm_stay_awake(&client->wlock); |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 929 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 930 | activate_client(client->hdl); |
| 931 | if (sync) |
| 932 | do_clk_scaling(); |
| 933 | else |
| 934 | queue_work(ipa_pm_ctx->wq, |
| 935 | &ipa_pm_ctx->clk_scaling.work); |
| 936 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 937 | return 0; |
| 938 | } |
| 939 | |
| 940 | client->state = IPA_PM_ACTIVATE_IN_PROGRESS; |
| 941 | init_completion(&client->complete); |
| 942 | queue_work(ipa_pm_ctx->wq, &client->activate_work); |
| 943 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 944 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 945 | return -EINPROGRESS; |
| 946 | } |
| 947 | |
| 948 | /** |
| 949 | * ipa_pm_activate(): activate ipa client to vote for clock(). Can be called |
| 950 | * from atomic context and returns -EINPROGRESS if cannot be done synchronously |
| 951 | * @hdl: index of the client in the array |
| 952 | * |
| 953 | * Returns: 0 on success, -EINPROGRESS if operation cannot be done synchronously |
| 954 | * and other negatives on failure |
| 955 | */ |
| 956 | int ipa_pm_activate(u32 hdl) |
| 957 | { |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 958 | if (ipa_pm_ctx == NULL) { |
| 959 | IPA_PM_ERR("PM_ctx is null\n"); |
| 960 | return -EINVAL; |
| 961 | } |
| 962 | |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 963 | if (hdl >= IPA_PM_MAX_CLIENTS || ipa_pm_ctx->clients[hdl] == NULL) { |
| 964 | IPA_PM_ERR("Invalid Param\n"); |
| 965 | return -EINVAL; |
| 966 | } |
| 967 | |
| 968 | return ipa_pm_activate_helper(ipa_pm_ctx->clients[hdl], false); |
| 969 | } |
| 970 | |
| 971 | /** |
| 972 | * ipa_pm_activate(): activate ipa client to vote for clock synchronously. |
| 973 | * Cannot be called from an atomic contex. |
| 974 | * @hdl: index of the client in the array |
| 975 | * |
| 976 | * Returns: 0 on success, negative on failure |
| 977 | */ |
| 978 | int ipa_pm_activate_sync(u32 hdl) |
| 979 | { |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 980 | if (ipa_pm_ctx == NULL) { |
| 981 | IPA_PM_ERR("PM_ctx is null\n"); |
| 982 | return -EINVAL; |
| 983 | } |
| 984 | |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 985 | if (hdl >= IPA_PM_MAX_CLIENTS || ipa_pm_ctx->clients[hdl] == NULL) { |
| 986 | IPA_PM_ERR("Invalid Param\n"); |
| 987 | return -EINVAL; |
| 988 | } |
| 989 | |
| 990 | return ipa_pm_activate_helper(ipa_pm_ctx->clients[hdl], true); |
| 991 | } |
| 992 | |
| 993 | /** |
| 994 | * ipa_pm_deferred_deactivate(): schedule a timer to deactivate client and |
| 995 | * devote clock. Can be called from atomic context (asynchronously) |
| 996 | * @hdl: index of the client in the array |
| 997 | * |
| 998 | * Returns: 0 on success, negative on failure |
| 999 | */ |
| 1000 | int ipa_pm_deferred_deactivate(u32 hdl) |
| 1001 | { |
| 1002 | struct ipa_pm_client *client; |
| 1003 | unsigned long flags; |
| 1004 | |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 1005 | if (ipa_pm_ctx == NULL) { |
| 1006 | IPA_PM_ERR("PM_ctx is null\n"); |
| 1007 | return -EINVAL; |
| 1008 | } |
| 1009 | |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1010 | if (hdl >= IPA_PM_MAX_CLIENTS || ipa_pm_ctx->clients[hdl] == NULL) { |
| 1011 | IPA_PM_ERR("Invalid Param\n"); |
| 1012 | return -EINVAL; |
| 1013 | } |
| 1014 | |
| 1015 | client = ipa_pm_ctx->clients[hdl]; |
| 1016 | IPA_PM_DBG_STATE(hdl, client->name, client->state); |
| 1017 | |
| 1018 | spin_lock_irqsave(&client->state_lock, flags); |
| 1019 | switch (client->state) { |
| 1020 | case IPA_PM_ACTIVATE_IN_PROGRESS: |
| 1021 | client->state = IPA_PM_DEACTIVATE_IN_PROGRESS; |
| 1022 | case IPA_PM_DEACTIVATED: |
| 1023 | IPA_PM_DBG_STATE(hdl, client->name, client->state); |
| 1024 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 1025 | return 0; |
| 1026 | case IPA_PM_ACTIVATED: |
| 1027 | client->state = IPA_PM_ACTIVATED_PENDING_DEACTIVATION; |
| 1028 | queue_delayed_work(ipa_pm_ctx->wq, &client->deactivate_work, |
| 1029 | msecs_to_jiffies(IPA_PM_DEFERRED_TIMEOUT)); |
| 1030 | break; |
| 1031 | case IPA_PM_ACTIVATED_TIMER_SET: |
| 1032 | case IPA_PM_ACTIVATED_PENDING_DEACTIVATION: |
| 1033 | client->state = IPA_PM_ACTIVATED_PENDING_RESCHEDULE; |
| 1034 | case IPA_PM_DEACTIVATE_IN_PROGRESS: |
| 1035 | case IPA_PM_ACTIVATED_PENDING_RESCHEDULE: |
| 1036 | break; |
| 1037 | } |
| 1038 | IPA_PM_DBG_STATE(hdl, client->name, client->state); |
| 1039 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 1040 | |
| 1041 | return 0; |
| 1042 | } |
| 1043 | |
| 1044 | /** |
| 1045 | * ipa_pm_deactivate_all_deferred(): Cancel the deferred deactivation timer and |
| 1046 | * immediately devotes for IPA clocks |
| 1047 | * |
| 1048 | * Returns: 0 on success, negative on failure |
| 1049 | */ |
| 1050 | int ipa_pm_deactivate_all_deferred(void) |
| 1051 | { |
| 1052 | int i; |
| 1053 | bool run_algorithm = false; |
| 1054 | struct ipa_pm_client *client; |
| 1055 | unsigned long flags; |
| 1056 | |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 1057 | if (ipa_pm_ctx == NULL) { |
| 1058 | IPA_PM_ERR("PM_ctx is null\n"); |
| 1059 | return -EINVAL; |
| 1060 | } |
| 1061 | |
Michael Adisumarta | f042482 | 2018-01-15 16:15:33 -0800 | [diff] [blame] | 1062 | for (i = 1; i < IPA_PM_MAX_CLIENTS; i++) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1063 | client = ipa_pm_ctx->clients[i]; |
| 1064 | |
| 1065 | if (client == NULL) |
| 1066 | continue; |
| 1067 | |
| 1068 | cancel_delayed_work_sync(&client->deactivate_work); |
| 1069 | |
| 1070 | if (IPA_PM_STATE_IN_PROGRESS(client->state)) { |
| 1071 | wait_for_completion(&client->complete); |
| 1072 | continue; |
| 1073 | } |
| 1074 | |
| 1075 | spin_lock_irqsave(&client->state_lock, flags); |
| 1076 | IPA_PM_DBG_STATE(client->hdl, client->name, client->state); |
| 1077 | |
| 1078 | if (client->state == IPA_PM_ACTIVATED_TIMER_SET) { |
| 1079 | client->state = IPA_PM_ACTIVATED; |
| 1080 | IPA_PM_DBG_STATE(client->hdl, client->name, |
| 1081 | client->state); |
| 1082 | spin_unlock_irqrestore(&client->state_lock, flags); |
Ghanim Fodi | a7af633 | 2017-11-28 20:32:07 +0200 | [diff] [blame] | 1083 | } else if (client->state == |
Chris Fries | 012712b | 2017-12-12 23:30:04 +0200 | [diff] [blame] | 1084 | IPA_PM_ACTIVATED_PENDING_DEACTIVATION || |
| 1085 | client->state == |
| 1086 | IPA_PM_ACTIVATED_PENDING_RESCHEDULE) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1087 | run_algorithm = true; |
| 1088 | client->state = IPA_PM_DEACTIVATED; |
| 1089 | IPA_PM_DBG_STATE(client->hdl, client->name, |
| 1090 | client->state); |
| 1091 | spin_unlock_irqrestore(&client->state_lock, flags); |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 1092 | if (!client->skip_clk_vote) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1093 | IPA_ACTIVE_CLIENTS_DEC_SPECIAL(client->name); |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 1094 | if (client->group == IPA_PM_GROUP_APPS) |
| 1095 | __pm_relax(&client->wlock); |
| 1096 | } |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1097 | deactivate_client(client->hdl); |
| 1098 | } else /* if activated or deactivated, we do nothing */ |
| 1099 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 1100 | } |
| 1101 | |
| 1102 | if (run_algorithm) |
| 1103 | do_clk_scaling(); |
| 1104 | |
| 1105 | return 0; |
| 1106 | } |
| 1107 | |
| 1108 | /** |
| 1109 | * ipa_pm_deactivate_sync(): deactivate ipa client and devote clock. Cannot be |
| 1110 | * called from atomic context. |
| 1111 | * @hdl: index of the client in the array |
| 1112 | * |
| 1113 | * Returns: 0 on success, negative on failure |
| 1114 | */ |
| 1115 | int ipa_pm_deactivate_sync(u32 hdl) |
| 1116 | { |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 1117 | struct ipa_pm_client *client; |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1118 | unsigned long flags; |
| 1119 | |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 1120 | if (ipa_pm_ctx == NULL) { |
| 1121 | IPA_PM_ERR("PM_ctx is null\n"); |
| 1122 | return -EINVAL; |
| 1123 | } |
| 1124 | |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1125 | if (hdl >= IPA_PM_MAX_CLIENTS || ipa_pm_ctx->clients[hdl] == NULL) { |
| 1126 | IPA_PM_ERR("Invalid Param\n"); |
| 1127 | return -EINVAL; |
| 1128 | } |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 1129 | client = ipa_pm_ctx->clients[hdl]; |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1130 | |
| 1131 | cancel_delayed_work_sync(&client->deactivate_work); |
| 1132 | |
| 1133 | if (IPA_PM_STATE_IN_PROGRESS(client->state)) |
| 1134 | wait_for_completion(&client->complete); |
| 1135 | |
| 1136 | spin_lock_irqsave(&client->state_lock, flags); |
| 1137 | IPA_PM_DBG_STATE(hdl, client->name, client->state); |
| 1138 | |
| 1139 | if (client->state == IPA_PM_DEACTIVATED) { |
| 1140 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 1145 | |
| 1146 | /* else case (Deactivates all Activated cases)*/ |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 1147 | if (!client->skip_clk_vote) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1148 | IPA_ACTIVE_CLIENTS_DEC_SPECIAL(client->name); |
Skylar Chang | 035d90c | 2018-01-31 10:02:07 -0800 | [diff] [blame] | 1149 | if (client->group == IPA_PM_GROUP_APPS) |
| 1150 | __pm_relax(&client->wlock); |
| 1151 | } |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1152 | |
| 1153 | spin_lock_irqsave(&client->state_lock, flags); |
| 1154 | client->state = IPA_PM_DEACTIVATED; |
| 1155 | IPA_PM_DBG_STATE(hdl, client->name, client->state); |
| 1156 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 1157 | deactivate_client(hdl); |
| 1158 | do_clk_scaling(); |
| 1159 | |
| 1160 | return 0; |
| 1161 | } |
| 1162 | |
| 1163 | /** |
| 1164 | * ipa_pm_handle_suspend(): calls the callbacks of suspended clients to wake up |
| 1165 | * @pipe_bitmask: the bits represent the indexes of the clients to be woken up |
| 1166 | * |
| 1167 | * Returns: 0 on success, negative on failure |
| 1168 | */ |
| 1169 | int ipa_pm_handle_suspend(u32 pipe_bitmask) |
| 1170 | { |
| 1171 | int i; |
| 1172 | struct ipa_pm_client *client; |
| 1173 | bool client_notified[IPA_PM_MAX_CLIENTS] = { false }; |
| 1174 | |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 1175 | if (ipa_pm_ctx == NULL) { |
| 1176 | IPA_PM_ERR("PM_ctx is null\n"); |
| 1177 | return -EINVAL; |
| 1178 | } |
| 1179 | |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1180 | IPA_PM_DBG_LOW("bitmask: %d", pipe_bitmask); |
| 1181 | |
| 1182 | if (pipe_bitmask == 0) |
| 1183 | return 0; |
| 1184 | |
| 1185 | mutex_lock(&ipa_pm_ctx->client_mutex); |
| 1186 | for (i = 0; i < IPA3_MAX_NUM_PIPES; i++) { |
| 1187 | if (pipe_bitmask & (1 << i)) { |
| 1188 | client = ipa_pm_ctx->clients_by_pipe[i]; |
| 1189 | if (client && client_notified[client->hdl] == false) { |
Michael Adisumarta | ce75fc7 | 2017-10-04 11:42:11 -0700 | [diff] [blame] | 1190 | if (client->callback) { |
| 1191 | client->callback(client->callback_params |
| 1192 | , IPA_PM_REQUEST_WAKEUP); |
| 1193 | client_notified[client->hdl] = true; |
| 1194 | } else { |
| 1195 | IPA_PM_ERR("client has no callback"); |
| 1196 | WARN_ON(1); |
| 1197 | } |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1198 | } |
| 1199 | } |
| 1200 | } |
| 1201 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 1202 | return 0; |
| 1203 | } |
| 1204 | |
| 1205 | /** |
| 1206 | * ipa_pm_set_perf_profile(): Adds/changes the throughput requirement to IPA PM |
| 1207 | * to be used for clock scaling |
| 1208 | * @hdl: index of the client in the array |
| 1209 | * @throughput: the new throughput value to be set for that client |
| 1210 | * |
| 1211 | * Returns: 0 on success, negative on failure |
| 1212 | */ |
| 1213 | int ipa_pm_set_perf_profile(u32 hdl, int throughput) |
| 1214 | { |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 1215 | struct ipa_pm_client *client; |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1216 | unsigned long flags; |
| 1217 | |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 1218 | if (ipa_pm_ctx == NULL) { |
| 1219 | IPA_PM_ERR("PM_ctx is null\n"); |
| 1220 | return -EINVAL; |
| 1221 | } |
| 1222 | |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1223 | if (hdl >= IPA_PM_MAX_CLIENTS || ipa_pm_ctx->clients[hdl] == NULL |
| 1224 | || throughput < 0) { |
| 1225 | IPA_PM_ERR("Invalid Params\n"); |
| 1226 | return -EINVAL; |
| 1227 | } |
Michael Adisumarta | 45653fe | 2017-12-13 20:32:44 -0800 | [diff] [blame] | 1228 | client = ipa_pm_ctx->clients[hdl]; |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1229 | |
| 1230 | mutex_lock(&ipa_pm_ctx->client_mutex); |
| 1231 | if (client->group == IPA_PM_GROUP_DEFAULT) |
| 1232 | IPA_PM_DBG_LOW("Old throughput: %d\n", client->throughput); |
| 1233 | else |
| 1234 | IPA_PM_DBG_LOW("old Group %d throughput: %d\n", |
| 1235 | client->group, ipa_pm_ctx->group_tput[client->group]); |
| 1236 | |
| 1237 | if (client->group == IPA_PM_GROUP_DEFAULT) |
| 1238 | client->throughput = throughput; |
| 1239 | else |
| 1240 | ipa_pm_ctx->group_tput[client->group] = throughput; |
| 1241 | |
| 1242 | if (client->group == IPA_PM_GROUP_DEFAULT) |
| 1243 | IPA_PM_DBG_LOW("New throughput: %d\n", client->throughput); |
| 1244 | else |
| 1245 | IPA_PM_DBG_LOW("New Group %d throughput: %d\n", |
| 1246 | client->group, ipa_pm_ctx->group_tput[client->group]); |
| 1247 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 1248 | |
| 1249 | spin_lock_irqsave(&client->state_lock, flags); |
Michael Adisumarta | 3a6f600 | 2017-09-26 16:48:12 -0700 | [diff] [blame] | 1250 | if (IPA_PM_STATE_ACTIVE(client->state) || (client->group != |
| 1251 | IPA_PM_GROUP_DEFAULT)) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1252 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 1253 | do_clk_scaling(); |
| 1254 | return 0; |
| 1255 | } |
| 1256 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 1257 | |
| 1258 | return 0; |
| 1259 | } |
| 1260 | |
| 1261 | /** |
| 1262 | * ipa_pm_stat() - print PM stat |
| 1263 | * @buf: [in] The user buff used to print |
| 1264 | * @size: [in] The size of buf |
| 1265 | * Returns: number of bytes used on success, negative on failure |
| 1266 | * |
| 1267 | * This function is called by ipa_debugfs in order to receive |
| 1268 | * a picture of the clients in the PM and the throughput, threshold and cur vote |
| 1269 | */ |
| 1270 | int ipa_pm_stat(char *buf, int size) |
| 1271 | { |
| 1272 | struct ipa_pm_client *client; |
| 1273 | struct clk_scaling_db *clk = &ipa_pm_ctx->clk_scaling; |
| 1274 | int i, j, tput, cnt = 0, result = 0; |
| 1275 | unsigned long flags; |
| 1276 | |
| 1277 | if (!buf || size < 0) |
| 1278 | return -EINVAL; |
| 1279 | |
| 1280 | mutex_lock(&ipa_pm_ctx->client_mutex); |
| 1281 | |
| 1282 | result = scnprintf(buf + cnt, size - cnt, "\n\nCurrent threshold: ["); |
| 1283 | cnt += result; |
| 1284 | |
| 1285 | for (i = 0; i < clk->threshold_size; i++) { |
| 1286 | result = scnprintf(buf + cnt, size - cnt, |
| 1287 | "%d, ", clk->current_threshold[i]); |
| 1288 | cnt += result; |
| 1289 | } |
| 1290 | |
| 1291 | result = scnprintf(buf + cnt, size - cnt, "\b\b]\n"); |
| 1292 | cnt += result; |
| 1293 | |
| 1294 | result = scnprintf(buf + cnt, size - cnt, |
| 1295 | "Aggregated tput: %d, Cur vote: %d", |
| 1296 | ipa_pm_ctx->aggregated_tput, clk->cur_vote); |
| 1297 | cnt += result; |
| 1298 | |
| 1299 | result = scnprintf(buf + cnt, size - cnt, "\n\nRegistered Clients:\n"); |
| 1300 | cnt += result; |
| 1301 | |
| 1302 | |
Michael Adisumarta | f042482 | 2018-01-15 16:15:33 -0800 | [diff] [blame] | 1303 | for (i = 1; i < IPA_PM_MAX_CLIENTS; i++) { |
Michael Adisumarta | c06df41 | 2017-09-19 10:10:35 -0700 | [diff] [blame] | 1304 | client = ipa_pm_ctx->clients[i]; |
| 1305 | |
| 1306 | if (client == NULL) |
| 1307 | continue; |
| 1308 | |
| 1309 | spin_lock_irqsave(&client->state_lock, flags); |
| 1310 | if (client->group == IPA_PM_GROUP_DEFAULT) |
| 1311 | tput = client->throughput; |
| 1312 | else |
| 1313 | tput = ipa_pm_ctx->group_tput[client->group]; |
| 1314 | |
| 1315 | result = scnprintf(buf + cnt, size - cnt, |
| 1316 | "Client[%d]: %s State:%s\nGroup: %s Throughput: %d Pipes: ", |
| 1317 | i, client->name, client_state_to_str[client->state], |
| 1318 | ipa_pm_group_to_str[client->group], tput); |
| 1319 | cnt += result; |
| 1320 | |
| 1321 | for (j = 0; j < IPA3_MAX_NUM_PIPES; j++) { |
| 1322 | if (ipa_pm_ctx->clients_by_pipe[j] == client) { |
| 1323 | result = scnprintf(buf + cnt, size - cnt, |
| 1324 | "%d, ", j); |
| 1325 | cnt += result; |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | result = scnprintf(buf + cnt, size - cnt, "\b\b\n\n"); |
| 1330 | cnt += result; |
| 1331 | spin_unlock_irqrestore(&client->state_lock, flags); |
| 1332 | } |
| 1333 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 1334 | |
| 1335 | return cnt; |
| 1336 | } |
| 1337 | |
| 1338 | /** |
| 1339 | * ipa_pm_exceptions_stat() - print PM exceptions stat |
| 1340 | * @buf: [in] The user buff used to print |
| 1341 | * @size: [in] The size of buf |
| 1342 | * Returns: number of bytes used on success, negative on failure |
| 1343 | * |
| 1344 | * This function is called by ipa_debugfs in order to receive |
| 1345 | * a full picture of the exceptions in the PM |
| 1346 | */ |
| 1347 | int ipa_pm_exceptions_stat(char *buf, int size) |
| 1348 | { |
| 1349 | int i, j, cnt = 0, result = 0; |
| 1350 | struct ipa_pm_exception_list *exception; |
| 1351 | |
| 1352 | if (!buf || size < 0) |
| 1353 | return -EINVAL; |
| 1354 | |
| 1355 | result = scnprintf(buf + cnt, size - cnt, "\n"); |
| 1356 | cnt += result; |
| 1357 | |
| 1358 | mutex_lock(&ipa_pm_ctx->client_mutex); |
| 1359 | for (i = 0; i < ipa_pm_ctx->clk_scaling.exception_size; i++) { |
| 1360 | exception = &ipa_pm_ctx->clk_scaling.exception_list[i]; |
| 1361 | if (exception == NULL) { |
| 1362 | result = scnprintf(buf + cnt, size - cnt, |
| 1363 | "Exception %d is NULL\n\n", i); |
| 1364 | cnt += result; |
| 1365 | continue; |
| 1366 | } |
| 1367 | |
| 1368 | result = scnprintf(buf + cnt, size - cnt, |
| 1369 | "Exception %d: %s\nPending: %d Bitmask: %d Threshold: [" |
| 1370 | , i, exception->clients, exception->pending, |
| 1371 | exception->bitmask); |
| 1372 | cnt += result; |
| 1373 | for (j = 0; j < ipa_pm_ctx->clk_scaling.threshold_size; j++) { |
| 1374 | result = scnprintf(buf + cnt, size - cnt, |
| 1375 | "%d, ", exception->threshold[j]); |
| 1376 | cnt += result; |
| 1377 | } |
| 1378 | result = scnprintf(buf + cnt, size - cnt, "\b\b]\n\n"); |
| 1379 | cnt += result; |
| 1380 | } |
| 1381 | mutex_unlock(&ipa_pm_ctx->client_mutex); |
| 1382 | |
| 1383 | return cnt; |
| 1384 | } |