Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 1 | /* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/slab.h> |
| 14 | #include <linux/workqueue.h> |
| 15 | #include <linux/ipa.h> |
| 16 | #include "ipa_rm_dependency_graph.h" |
| 17 | #include "ipa_rm_i.h" |
| 18 | #include "ipa_common_i.h" |
| 19 | |
| 20 | static const char *resource_name_to_str[IPA_RM_RESOURCE_MAX] = { |
| 21 | __stringify(IPA_RM_RESOURCE_Q6_PROD), |
| 22 | __stringify(IPA_RM_RESOURCE_USB_PROD), |
| 23 | __stringify(IPA_RM_RESOURCE_USB_DPL_DUMMY_PROD), |
| 24 | __stringify(IPA_RM_RESOURCE_HSIC_PROD), |
| 25 | __stringify(IPA_RM_RESOURCE_STD_ECM_PROD), |
| 26 | __stringify(IPA_RM_RESOURCE_RNDIS_PROD), |
| 27 | __stringify(IPA_RM_RESOURCE_WWAN_0_PROD), |
| 28 | __stringify(IPA_RM_RESOURCE_WLAN_PROD), |
| 29 | __stringify(IPA_RM_RESOURCE_ODU_ADAPT_PROD), |
| 30 | __stringify(IPA_RM_RESOURCE_MHI_PROD), |
| 31 | __stringify(IPA_RM_RESOURCE_Q6_CONS), |
| 32 | __stringify(IPA_RM_RESOURCE_USB_CONS), |
| 33 | __stringify(IPA_RM_RESOURCE_USB_DPL_CONS), |
| 34 | __stringify(IPA_RM_RESOURCE_HSIC_CONS), |
| 35 | __stringify(IPA_RM_RESOURCE_WLAN_CONS), |
| 36 | __stringify(IPA_RM_RESOURCE_APPS_CONS), |
| 37 | __stringify(IPA_RM_RESOURCE_ODU_ADAPT_CONS), |
| 38 | __stringify(IPA_RM_RESOURCE_MHI_CONS), |
| 39 | }; |
| 40 | |
| 41 | struct ipa_rm_profile_vote_type { |
| 42 | enum ipa_voltage_level volt[IPA_RM_RESOURCE_MAX]; |
| 43 | enum ipa_voltage_level curr_volt; |
| 44 | u32 bw_prods[IPA_RM_RESOURCE_PROD_MAX]; |
| 45 | u32 bw_cons[IPA_RM_RESOURCE_CONS_MAX]; |
| 46 | u32 curr_bw; |
| 47 | }; |
| 48 | |
| 49 | struct ipa_rm_context_type { |
| 50 | struct ipa_rm_dep_graph *dep_graph; |
| 51 | struct workqueue_struct *ipa_rm_wq; |
| 52 | spinlock_t ipa_rm_lock; |
| 53 | struct ipa_rm_profile_vote_type prof_vote; |
| 54 | }; |
| 55 | static struct ipa_rm_context_type *ipa_rm_ctx; |
| 56 | |
| 57 | struct ipa_rm_notify_ipa_work_type { |
| 58 | struct work_struct work; |
| 59 | enum ipa_voltage_level volt; |
| 60 | u32 bandwidth_mbps; |
| 61 | }; |
| 62 | |
| 63 | /** |
| 64 | * ipa_rm_create_resource() - create resource |
| 65 | * @create_params: [in] parameters needed |
| 66 | * for resource initialization |
| 67 | * |
| 68 | * Returns: 0 on success, negative on failure |
| 69 | * |
| 70 | * This function is called by IPA RM client to initialize client's resources. |
| 71 | * This API should be called before any other IPA RM API on a given resource |
| 72 | * name. |
| 73 | * |
| 74 | */ |
| 75 | int ipa_rm_create_resource(struct ipa_rm_create_params *create_params) |
| 76 | { |
| 77 | struct ipa_rm_resource *resource; |
| 78 | unsigned long flags; |
| 79 | int result; |
| 80 | |
| 81 | if (unlikely(!ipa_rm_ctx)) { |
| 82 | IPA_RM_ERR("IPA RM was not initialized\n"); |
| 83 | return -EINVAL; |
| 84 | } |
| 85 | |
| 86 | if (!create_params) { |
| 87 | IPA_RM_ERR("invalid args\n"); |
| 88 | return -EINVAL; |
| 89 | } |
| 90 | IPA_RM_DBG("%s\n", ipa_rm_resource_str(create_params->name)); |
| 91 | |
| 92 | if (create_params->floor_voltage < 0 || |
| 93 | create_params->floor_voltage >= IPA_VOLTAGE_MAX) { |
| 94 | IPA_RM_ERR("invalid voltage %d\n", |
| 95 | create_params->floor_voltage); |
| 96 | return -EINVAL; |
| 97 | } |
| 98 | |
| 99 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 100 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 101 | create_params->name, |
| 102 | &resource) == 0) { |
| 103 | IPA_RM_ERR("resource already exists\n"); |
| 104 | result = -EEXIST; |
| 105 | goto bail; |
| 106 | } |
| 107 | result = ipa_rm_resource_create(create_params, |
| 108 | &resource); |
| 109 | if (result) { |
| 110 | IPA_RM_ERR("ipa_rm_resource_create() failed\n"); |
| 111 | goto bail; |
| 112 | } |
| 113 | result = ipa_rm_dep_graph_add(ipa_rm_ctx->dep_graph, resource); |
| 114 | if (result) { |
| 115 | IPA_RM_ERR("ipa_rm_dep_graph_add() failed\n"); |
| 116 | ipa_rm_resource_delete(resource); |
| 117 | goto bail; |
| 118 | } |
| 119 | bail: |
| 120 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 121 | IPA_RM_DBG("EXIT with %d\n", result); |
| 122 | |
| 123 | return result; |
| 124 | } |
| 125 | EXPORT_SYMBOL(ipa_rm_create_resource); |
| 126 | |
| 127 | /** |
| 128 | * ipa_rm_delete_resource() - delete resource |
| 129 | * @resource_name: name of resource to be deleted |
| 130 | * |
| 131 | * Returns: 0 on success, negative on failure |
| 132 | * |
| 133 | * This function is called by IPA RM client to delete client's resources. |
| 134 | * |
| 135 | */ |
| 136 | int ipa_rm_delete_resource(enum ipa_rm_resource_name resource_name) |
| 137 | { |
| 138 | struct ipa_rm_resource *resource; |
| 139 | unsigned long flags; |
| 140 | int result; |
| 141 | |
| 142 | if (unlikely(!ipa_rm_ctx)) { |
| 143 | IPA_RM_ERR("IPA RM was not initialized\n"); |
| 144 | return -EINVAL; |
| 145 | } |
| 146 | |
| 147 | IPA_RM_DBG("%s\n", ipa_rm_resource_str(resource_name)); |
| 148 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 149 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 150 | resource_name, |
| 151 | &resource) != 0) { |
| 152 | IPA_RM_ERR("resource does not exist\n"); |
| 153 | result = -EINVAL; |
| 154 | goto bail; |
| 155 | } |
| 156 | result = ipa_rm_resource_delete(resource); |
| 157 | if (result) { |
| 158 | IPA_RM_ERR("ipa_rm_resource_delete() failed\n"); |
| 159 | goto bail; |
| 160 | } |
| 161 | result = ipa_rm_dep_graph_remove(ipa_rm_ctx->dep_graph, |
| 162 | resource_name); |
| 163 | if (result) { |
| 164 | IPA_RM_ERR("ipa_rm_dep_graph_remove() failed\n"); |
| 165 | goto bail; |
| 166 | } |
| 167 | bail: |
| 168 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 169 | IPA_RM_DBG("EXIT with %d\n", result); |
| 170 | |
| 171 | return result; |
| 172 | } |
| 173 | EXPORT_SYMBOL(ipa_rm_delete_resource); |
| 174 | |
| 175 | static int _ipa_rm_add_dependency(enum ipa_rm_resource_name resource_name, |
| 176 | enum ipa_rm_resource_name depends_on_name, |
| 177 | bool userspace_dep) |
| 178 | { |
| 179 | unsigned long flags; |
| 180 | int result; |
| 181 | |
| 182 | if (unlikely(!ipa_rm_ctx)) { |
| 183 | IPA_RM_ERR("IPA RM was not initialized\n"); |
| 184 | return -EINVAL; |
| 185 | } |
| 186 | |
| 187 | IPA_RM_DBG("%s -> %s\n", ipa_rm_resource_str(resource_name), |
| 188 | ipa_rm_resource_str(depends_on_name)); |
| 189 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 190 | result = ipa_rm_dep_graph_add_dependency( |
| 191 | ipa_rm_ctx->dep_graph, |
| 192 | resource_name, |
| 193 | depends_on_name, |
| 194 | userspace_dep); |
| 195 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 196 | IPA_RM_DBG("EXIT with %d\n", result); |
| 197 | |
| 198 | return result; |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * ipa_rm_add_dependency() - create dependency between 2 resources |
| 203 | * @resource_name: name of dependent resource |
| 204 | * @depends_on_name: name of its dependency |
| 205 | * |
| 206 | * Returns: 0 on success, negative on failure |
| 207 | * |
| 208 | * Side effects: IPA_RM_RESORCE_GRANTED could be generated |
| 209 | * in case client registered with IPA RM |
| 210 | */ |
| 211 | int ipa_rm_add_dependency(enum ipa_rm_resource_name resource_name, |
| 212 | enum ipa_rm_resource_name depends_on_name) |
| 213 | { |
| 214 | return _ipa_rm_add_dependency(resource_name, depends_on_name, false); |
| 215 | } |
| 216 | EXPORT_SYMBOL(ipa_rm_add_dependency); |
| 217 | |
| 218 | /** |
| 219 | * ipa_rm_add_dependency_from_ioctl() - create dependency between 2 resources |
| 220 | * @resource_name: name of dependent resource |
| 221 | * @depends_on_name: name of its dependency |
| 222 | * |
| 223 | * This function is expected to be called from IOCTL and the dependency will be |
| 224 | * marked as is was added by the userspace. |
| 225 | * |
| 226 | * Returns: 0 on success, negative on failure |
| 227 | * |
| 228 | * Side effects: IPA_RM_RESORCE_GRANTED could be generated |
| 229 | * in case client registered with IPA RM |
| 230 | */ |
| 231 | int ipa_rm_add_dependency_from_ioctl(enum ipa_rm_resource_name resource_name, |
| 232 | enum ipa_rm_resource_name depends_on_name) |
| 233 | { |
| 234 | return _ipa_rm_add_dependency(resource_name, depends_on_name, true); |
| 235 | } |
| 236 | |
| 237 | static int _ipa_rm_add_dependency_sync(enum ipa_rm_resource_name resource_name, |
| 238 | enum ipa_rm_resource_name depends_on_name, |
| 239 | bool userspsace_dep) |
| 240 | { |
| 241 | int result; |
| 242 | struct ipa_rm_resource *consumer; |
| 243 | unsigned long time; |
| 244 | unsigned long flags; |
| 245 | |
| 246 | if (unlikely(!ipa_rm_ctx)) { |
| 247 | IPA_RM_ERR("IPA RM was not initialized\n"); |
| 248 | return -EINVAL; |
| 249 | } |
| 250 | |
| 251 | IPA_RM_DBG("%s -> %s\n", ipa_rm_resource_str(resource_name), |
| 252 | ipa_rm_resource_str(depends_on_name)); |
| 253 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 254 | result = ipa_rm_dep_graph_add_dependency( |
| 255 | ipa_rm_ctx->dep_graph, |
| 256 | resource_name, |
| 257 | depends_on_name, |
| 258 | userspsace_dep); |
| 259 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 260 | if (result == -EINPROGRESS) { |
| 261 | ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 262 | depends_on_name, |
| 263 | &consumer); |
| 264 | IPA_RM_DBG("%s waits for GRANT of %s.\n", |
| 265 | ipa_rm_resource_str(resource_name), |
| 266 | ipa_rm_resource_str(depends_on_name)); |
| 267 | time = wait_for_completion_timeout( |
| 268 | &((struct ipa_rm_resource_cons *)consumer)-> |
| 269 | request_consumer_in_progress, |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame^] | 270 | HZ * 5); |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 271 | result = 0; |
| 272 | if (!time) { |
| 273 | IPA_RM_ERR("TIMEOUT waiting for %s GRANT event.", |
| 274 | ipa_rm_resource_str(depends_on_name)); |
| 275 | result = -ETIME; |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame^] | 276 | } else { |
| 277 | IPA_RM_DBG("%s waited for %s GRANT %lu time.\n", |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 278 | ipa_rm_resource_str(resource_name), |
| 279 | ipa_rm_resource_str(depends_on_name), |
| 280 | time); |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame^] | 281 | } |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 282 | } |
| 283 | IPA_RM_DBG("EXIT with %d\n", result); |
| 284 | |
| 285 | return result; |
| 286 | } |
| 287 | /** |
| 288 | * ipa_rm_add_dependency_sync() - Create a dependency between 2 resources |
| 289 | * in a synchronized fashion. In case a producer resource is in GRANTED state |
| 290 | * and the newly added consumer resource is in RELEASED state, the consumer |
| 291 | * entity will be requested and the function will block until the consumer |
| 292 | * is granted. |
| 293 | * @resource_name: name of dependent resource |
| 294 | * @depends_on_name: name of its dependency |
| 295 | * |
| 296 | * This function is expected to be called from IOCTL and the dependency will be |
| 297 | * marked as is was added by the userspace. |
| 298 | * |
| 299 | * Returns: 0 on success, negative on failure |
| 300 | * |
| 301 | * Side effects: May block. See documentation above. |
| 302 | */ |
| 303 | int ipa_rm_add_dependency_sync(enum ipa_rm_resource_name resource_name, |
| 304 | enum ipa_rm_resource_name depends_on_name) |
| 305 | { |
| 306 | return _ipa_rm_add_dependency_sync(resource_name, depends_on_name, |
| 307 | false); |
| 308 | } |
| 309 | EXPORT_SYMBOL(ipa_rm_add_dependency_sync); |
| 310 | |
| 311 | /** |
| 312 | * ipa_rm_add_dependency_sync_from_ioctl() - Create a dependency between 2 |
| 313 | * resources in a synchronized fashion. In case a producer resource is in |
| 314 | * GRANTED state and the newly added consumer resource is in RELEASED state, |
| 315 | * the consumer entity will be requested and the function will block until |
| 316 | * the consumer is granted. |
| 317 | * @resource_name: name of dependent resource |
| 318 | * @depends_on_name: name of its dependency |
| 319 | * |
| 320 | * Returns: 0 on success, negative on failure |
| 321 | * |
| 322 | * Side effects: May block. See documentation above. |
| 323 | */ |
| 324 | int ipa_rm_add_dependency_sync_from_ioctl( |
| 325 | enum ipa_rm_resource_name resource_name, |
| 326 | enum ipa_rm_resource_name depends_on_name) |
| 327 | { |
| 328 | return _ipa_rm_add_dependency_sync(resource_name, depends_on_name, |
| 329 | true); |
| 330 | } |
| 331 | |
| 332 | static int _ipa_rm_delete_dependency(enum ipa_rm_resource_name resource_name, |
| 333 | enum ipa_rm_resource_name depends_on_name, |
| 334 | bool userspace_dep) |
| 335 | { |
| 336 | unsigned long flags; |
| 337 | int result; |
| 338 | |
| 339 | if (unlikely(!ipa_rm_ctx)) { |
| 340 | IPA_RM_ERR("IPA RM was not initialized\n"); |
| 341 | return -EINVAL; |
| 342 | } |
| 343 | |
| 344 | IPA_RM_DBG("%s -> %s\n", ipa_rm_resource_str(resource_name), |
| 345 | ipa_rm_resource_str(depends_on_name)); |
| 346 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 347 | result = ipa_rm_dep_graph_delete_dependency( |
| 348 | ipa_rm_ctx->dep_graph, |
| 349 | resource_name, |
| 350 | depends_on_name, |
| 351 | userspace_dep); |
| 352 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 353 | IPA_RM_DBG("EXIT with %d\n", result); |
| 354 | |
| 355 | return result; |
| 356 | } |
| 357 | |
| 358 | /** |
| 359 | * ipa_rm_delete_dependency() - delete dependency between 2 resources |
| 360 | * @resource_name: name of dependent resource |
| 361 | * @depends_on_name: name of its dependency |
| 362 | * |
| 363 | * Returns: 0 on success, negative on failure |
| 364 | * |
| 365 | * Side effects: IPA_RM_RESORCE_GRANTED could be generated |
| 366 | * in case client registered with IPA RM |
| 367 | */ |
| 368 | int ipa_rm_delete_dependency(enum ipa_rm_resource_name resource_name, |
| 369 | enum ipa_rm_resource_name depends_on_name) |
| 370 | { |
| 371 | return _ipa_rm_delete_dependency(resource_name, depends_on_name, false); |
| 372 | } |
| 373 | EXPORT_SYMBOL(ipa_rm_delete_dependency); |
| 374 | |
| 375 | /** |
| 376 | * ipa_rm_delete_dependency_fron_ioctl() - delete dependency between 2 resources |
| 377 | * @resource_name: name of dependent resource |
| 378 | * @depends_on_name: name of its dependency |
| 379 | * |
| 380 | * This function is expected to be called from IOCTL and the dependency will be |
| 381 | * marked as is was added by the userspace. |
| 382 | * |
| 383 | * Returns: 0 on success, negative on failure |
| 384 | * |
| 385 | * Side effects: IPA_RM_RESORCE_GRANTED could be generated |
| 386 | * in case client registered with IPA RM |
| 387 | */ |
| 388 | int ipa_rm_delete_dependency_from_ioctl(enum ipa_rm_resource_name resource_name, |
| 389 | enum ipa_rm_resource_name depends_on_name) |
| 390 | { |
| 391 | return _ipa_rm_delete_dependency(resource_name, depends_on_name, true); |
| 392 | } |
| 393 | |
| 394 | /** |
| 395 | * ipa_rm_request_resource() - request resource |
| 396 | * @resource_name: [in] name of the requested resource |
| 397 | * |
| 398 | * Returns: 0 on success, negative on failure |
| 399 | * |
| 400 | * All registered callbacks are called with IPA_RM_RESOURCE_GRANTED |
| 401 | * on successful completion of this operation. |
| 402 | */ |
| 403 | int ipa_rm_request_resource(enum ipa_rm_resource_name resource_name) |
| 404 | { |
| 405 | struct ipa_rm_resource *resource; |
| 406 | unsigned long flags; |
| 407 | int result; |
| 408 | |
| 409 | if (unlikely(!ipa_rm_ctx)) { |
| 410 | IPA_RM_ERR("IPA RM was not initialized\n"); |
| 411 | return -EINVAL; |
| 412 | } |
| 413 | |
| 414 | if (!IPA_RM_RESORCE_IS_PROD(resource_name)) { |
| 415 | IPA_RM_ERR("can be called on PROD only\n"); |
| 416 | return -EINVAL; |
| 417 | } |
| 418 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 419 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 420 | resource_name, |
| 421 | &resource) != 0) { |
| 422 | IPA_RM_ERR("resource does not exists\n"); |
| 423 | result = -EPERM; |
| 424 | goto bail; |
| 425 | } |
| 426 | result = ipa_rm_resource_producer_request( |
| 427 | (struct ipa_rm_resource_prod *)resource); |
| 428 | |
| 429 | bail: |
| 430 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 431 | |
| 432 | return result; |
| 433 | } |
| 434 | EXPORT_SYMBOL(ipa_rm_request_resource); |
| 435 | |
| 436 | void delayed_release_work_func(struct work_struct *work) |
| 437 | { |
| 438 | unsigned long flags; |
| 439 | struct ipa_rm_resource *resource; |
| 440 | struct ipa_rm_delayed_release_work_type *rwork = container_of( |
| 441 | to_delayed_work(work), |
| 442 | struct ipa_rm_delayed_release_work_type, |
| 443 | work); |
| 444 | |
| 445 | if (!IPA_RM_RESORCE_IS_CONS(rwork->resource_name)) { |
| 446 | IPA_RM_ERR("can be called on CONS only\n"); |
| 447 | kfree(rwork); |
| 448 | return; |
| 449 | } |
| 450 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 451 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 452 | rwork->resource_name, |
| 453 | &resource) != 0) { |
| 454 | IPA_RM_ERR("resource does not exists\n"); |
| 455 | goto bail; |
| 456 | } |
| 457 | |
| 458 | ipa_rm_resource_consumer_release( |
| 459 | (struct ipa_rm_resource_cons *)resource, rwork->needed_bw, |
| 460 | rwork->dec_usage_count); |
| 461 | |
| 462 | bail: |
| 463 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 464 | kfree(rwork); |
| 465 | |
| 466 | } |
| 467 | |
| 468 | /** |
| 469 | * ipa_rm_request_resource_with_timer() - requests the specified consumer |
| 470 | * resource and releases it after 1 second |
| 471 | * @resource_name: name of the requested resource |
| 472 | * |
| 473 | * Returns: 0 on success, negative on failure |
| 474 | */ |
| 475 | int ipa_rm_request_resource_with_timer(enum ipa_rm_resource_name resource_name) |
| 476 | { |
| 477 | unsigned long flags; |
| 478 | struct ipa_rm_resource *resource; |
| 479 | struct ipa_rm_delayed_release_work_type *release_work; |
| 480 | int result; |
| 481 | |
| 482 | if (!IPA_RM_RESORCE_IS_CONS(resource_name)) { |
| 483 | IPA_RM_ERR("can be called on CONS only\n"); |
| 484 | return -EINVAL; |
| 485 | } |
| 486 | |
| 487 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 488 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 489 | resource_name, |
| 490 | &resource) != 0) { |
| 491 | IPA_RM_ERR("resource does not exists\n"); |
| 492 | result = -EPERM; |
| 493 | goto bail; |
| 494 | } |
| 495 | result = ipa_rm_resource_consumer_request( |
| 496 | (struct ipa_rm_resource_cons *)resource, 0, false, true); |
| 497 | if (result != 0 && result != -EINPROGRESS) { |
| 498 | IPA_RM_ERR("consumer request returned error %d\n", result); |
| 499 | result = -EPERM; |
| 500 | goto bail; |
| 501 | } |
| 502 | |
| 503 | release_work = kzalloc(sizeof(*release_work), GFP_ATOMIC); |
| 504 | if (!release_work) { |
| 505 | result = -ENOMEM; |
| 506 | goto bail; |
| 507 | } |
| 508 | release_work->resource_name = resource->name; |
| 509 | release_work->needed_bw = 0; |
| 510 | release_work->dec_usage_count = false; |
| 511 | INIT_DELAYED_WORK(&release_work->work, delayed_release_work_func); |
| 512 | schedule_delayed_work(&release_work->work, |
| 513 | msecs_to_jiffies(IPA_RM_RELEASE_DELAY_IN_MSEC)); |
| 514 | result = 0; |
| 515 | bail: |
| 516 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 517 | |
| 518 | return result; |
| 519 | } |
| 520 | |
| 521 | /** |
| 522 | * ipa_rm_release_resource() - release resource |
| 523 | * @resource_name: [in] name of the requested resource |
| 524 | * |
| 525 | * Returns: 0 on success, negative on failure |
| 526 | * |
| 527 | * All registered callbacks are called with IPA_RM_RESOURCE_RELEASED |
| 528 | * on successful completion of this operation. |
| 529 | */ |
| 530 | int ipa_rm_release_resource(enum ipa_rm_resource_name resource_name) |
| 531 | { |
| 532 | unsigned long flags; |
| 533 | struct ipa_rm_resource *resource; |
| 534 | int result; |
| 535 | |
| 536 | if (unlikely(!ipa_rm_ctx)) { |
| 537 | IPA_RM_ERR("IPA RM was not initialized\n"); |
| 538 | return -EINVAL; |
| 539 | } |
| 540 | |
| 541 | if (!IPA_RM_RESORCE_IS_PROD(resource_name)) { |
| 542 | IPA_RM_ERR("can be called on PROD only\n"); |
| 543 | return -EINVAL; |
| 544 | } |
| 545 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 546 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 547 | resource_name, |
| 548 | &resource) != 0) { |
| 549 | IPA_RM_ERR("resource does not exists\n"); |
| 550 | result = -EPERM; |
| 551 | goto bail; |
| 552 | } |
| 553 | result = ipa_rm_resource_producer_release( |
| 554 | (struct ipa_rm_resource_prod *)resource); |
| 555 | |
| 556 | bail: |
| 557 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 558 | |
| 559 | return result; |
| 560 | } |
| 561 | EXPORT_SYMBOL(ipa_rm_release_resource); |
| 562 | |
| 563 | /** |
| 564 | * ipa_rm_register() - register for event |
| 565 | * @resource_name: resource name |
| 566 | * @reg_params: [in] registration parameters |
| 567 | * |
| 568 | * Returns: 0 on success, negative on failure |
| 569 | * |
| 570 | * Registration parameters provided here should be the same |
| 571 | * as provided later in ipa_rm_deregister() call. |
| 572 | */ |
| 573 | int ipa_rm_register(enum ipa_rm_resource_name resource_name, |
| 574 | struct ipa_rm_register_params *reg_params) |
| 575 | { |
| 576 | int result; |
| 577 | unsigned long flags; |
| 578 | struct ipa_rm_resource *resource; |
| 579 | |
| 580 | IPA_RM_DBG("%s\n", ipa_rm_resource_str(resource_name)); |
| 581 | |
| 582 | if (!IPA_RM_RESORCE_IS_PROD(resource_name)) { |
| 583 | IPA_RM_ERR("can be called on PROD only\n"); |
| 584 | return -EINVAL; |
| 585 | } |
| 586 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 587 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 588 | resource_name, |
| 589 | &resource) != 0) { |
| 590 | IPA_RM_ERR("resource does not exists\n"); |
| 591 | result = -EPERM; |
| 592 | goto bail; |
| 593 | } |
| 594 | result = ipa_rm_resource_producer_register( |
| 595 | (struct ipa_rm_resource_prod *)resource, |
| 596 | reg_params, |
| 597 | true); |
| 598 | bail: |
| 599 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 600 | IPA_RM_DBG("EXIT with %d\n", result); |
| 601 | |
| 602 | return result; |
| 603 | } |
| 604 | EXPORT_SYMBOL(ipa_rm_register); |
| 605 | |
| 606 | /** |
| 607 | * ipa_rm_deregister() - cancel the registration |
| 608 | * @resource_name: resource name |
| 609 | * @reg_params: [in] registration parameters |
| 610 | * |
| 611 | * Returns: 0 on success, negative on failure |
| 612 | * |
| 613 | * Registration parameters provided here should be the same |
| 614 | * as provided in ipa_rm_register() call. |
| 615 | */ |
| 616 | int ipa_rm_deregister(enum ipa_rm_resource_name resource_name, |
| 617 | struct ipa_rm_register_params *reg_params) |
| 618 | { |
| 619 | int result; |
| 620 | unsigned long flags; |
| 621 | struct ipa_rm_resource *resource; |
| 622 | |
| 623 | IPA_RM_DBG("%s\n", ipa_rm_resource_str(resource_name)); |
| 624 | |
| 625 | if (!IPA_RM_RESORCE_IS_PROD(resource_name)) { |
| 626 | IPA_RM_ERR("can be called on PROD only\n"); |
| 627 | return -EINVAL; |
| 628 | } |
| 629 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 630 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 631 | resource_name, |
| 632 | &resource) != 0) { |
| 633 | IPA_RM_ERR("resource does not exists\n"); |
| 634 | result = -EPERM; |
| 635 | goto bail; |
| 636 | } |
| 637 | result = ipa_rm_resource_producer_deregister( |
| 638 | (struct ipa_rm_resource_prod *)resource, |
| 639 | reg_params); |
| 640 | bail: |
| 641 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 642 | IPA_RM_DBG("EXIT with %d\n", result); |
| 643 | |
| 644 | return result; |
| 645 | } |
| 646 | EXPORT_SYMBOL(ipa_rm_deregister); |
| 647 | |
| 648 | /** |
| 649 | * ipa_rm_set_perf_profile() - set performance profile |
| 650 | * @resource_name: resource name |
| 651 | * @profile: [in] profile information. |
| 652 | * |
| 653 | * Returns: 0 on success, negative on failure |
| 654 | * |
| 655 | * Set resource performance profile. |
| 656 | * Updates IPA driver if performance level changed. |
| 657 | */ |
| 658 | int ipa_rm_set_perf_profile(enum ipa_rm_resource_name resource_name, |
| 659 | struct ipa_rm_perf_profile *profile) |
| 660 | { |
| 661 | int result; |
| 662 | unsigned long flags; |
| 663 | struct ipa_rm_resource *resource; |
| 664 | |
| 665 | if (unlikely(!ipa_rm_ctx)) { |
| 666 | IPA_RM_ERR("IPA RM was not initialized\n"); |
| 667 | return -EINVAL; |
| 668 | } |
| 669 | |
| 670 | IPA_RM_DBG("%s\n", ipa_rm_resource_str(resource_name)); |
| 671 | if (profile) |
| 672 | IPA_RM_DBG("BW: %d\n", profile->max_supported_bandwidth_mbps); |
| 673 | |
| 674 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 675 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 676 | resource_name, |
| 677 | &resource) != 0) { |
| 678 | IPA_RM_ERR("resource does not exists\n"); |
| 679 | result = -EPERM; |
| 680 | goto bail; |
| 681 | } |
| 682 | result = ipa_rm_resource_set_perf_profile(resource, profile); |
| 683 | if (result) { |
| 684 | IPA_RM_ERR("ipa_rm_resource_set_perf_profile failed %d\n", |
| 685 | result); |
| 686 | goto bail; |
| 687 | } |
| 688 | |
| 689 | result = 0; |
| 690 | bail: |
| 691 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 692 | IPA_RM_DBG("EXIT with %d\n", result); |
| 693 | |
| 694 | return result; |
| 695 | } |
| 696 | EXPORT_SYMBOL(ipa_rm_set_perf_profile); |
| 697 | |
| 698 | /** |
| 699 | * ipa_rm_notify_completion() - |
| 700 | * consumer driver notification for |
| 701 | * request_resource / release_resource operations |
| 702 | * completion |
| 703 | * @event: notified event |
| 704 | * @resource_name: resource name |
| 705 | * |
| 706 | * Returns: 0 on success, negative on failure |
| 707 | */ |
| 708 | int ipa_rm_notify_completion(enum ipa_rm_event event, |
| 709 | enum ipa_rm_resource_name resource_name) |
| 710 | { |
| 711 | int result; |
| 712 | |
| 713 | if (unlikely(!ipa_rm_ctx)) { |
| 714 | IPA_RM_ERR("IPA RM was not initialized\n"); |
| 715 | return -EINVAL; |
| 716 | } |
| 717 | |
| 718 | IPA_RM_DBG("event %d on %s\n", event, |
| 719 | ipa_rm_resource_str(resource_name)); |
| 720 | if (!IPA_RM_RESORCE_IS_CONS(resource_name)) { |
| 721 | IPA_RM_ERR("can be called on CONS only\n"); |
| 722 | result = -EINVAL; |
| 723 | goto bail; |
| 724 | } |
| 725 | ipa_rm_wq_send_cmd(IPA_RM_WQ_RESOURCE_CB, |
| 726 | resource_name, |
| 727 | event, |
| 728 | false); |
| 729 | result = 0; |
| 730 | bail: |
| 731 | IPA_RM_DBG("EXIT with %d\n", result); |
| 732 | |
| 733 | return result; |
| 734 | } |
| 735 | EXPORT_SYMBOL(ipa_rm_notify_completion); |
| 736 | |
| 737 | static void ipa_rm_wq_handler(struct work_struct *work) |
| 738 | { |
| 739 | unsigned long flags; |
| 740 | struct ipa_rm_resource *resource; |
| 741 | struct ipa_rm_wq_work_type *ipa_rm_work = |
| 742 | container_of(work, |
| 743 | struct ipa_rm_wq_work_type, |
| 744 | work); |
| 745 | IPA_RM_DBG_LOW("%s cmd=%d event=%d notify_registered_only=%d\n", |
| 746 | ipa_rm_resource_str(ipa_rm_work->resource_name), |
| 747 | ipa_rm_work->wq_cmd, |
| 748 | ipa_rm_work->event, |
| 749 | ipa_rm_work->notify_registered_only); |
| 750 | switch (ipa_rm_work->wq_cmd) { |
| 751 | case IPA_RM_WQ_NOTIFY_PROD: |
| 752 | if (!IPA_RM_RESORCE_IS_PROD(ipa_rm_work->resource_name)) { |
| 753 | IPA_RM_ERR("resource is not PROD\n"); |
| 754 | goto free_work; |
| 755 | } |
| 756 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 757 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 758 | ipa_rm_work->resource_name, |
| 759 | &resource) != 0){ |
| 760 | IPA_RM_ERR("resource does not exists\n"); |
| 761 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 762 | goto free_work; |
| 763 | } |
| 764 | ipa_rm_resource_producer_notify_clients( |
| 765 | (struct ipa_rm_resource_prod *)resource, |
| 766 | ipa_rm_work->event, |
| 767 | ipa_rm_work->notify_registered_only); |
| 768 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 769 | break; |
| 770 | case IPA_RM_WQ_NOTIFY_CONS: |
| 771 | break; |
| 772 | case IPA_RM_WQ_RESOURCE_CB: |
| 773 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 774 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 775 | ipa_rm_work->resource_name, |
| 776 | &resource) != 0){ |
| 777 | IPA_RM_ERR("resource does not exists\n"); |
| 778 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 779 | goto free_work; |
| 780 | } |
| 781 | ipa_rm_resource_consumer_handle_cb( |
| 782 | (struct ipa_rm_resource_cons *)resource, |
| 783 | ipa_rm_work->event); |
| 784 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 785 | break; |
| 786 | default: |
| 787 | break; |
| 788 | } |
| 789 | |
| 790 | free_work: |
| 791 | kfree((void *) work); |
| 792 | } |
| 793 | |
| 794 | static void ipa_rm_wq_resume_handler(struct work_struct *work) |
| 795 | { |
| 796 | unsigned long flags; |
| 797 | struct ipa_rm_resource *resource; |
| 798 | struct ipa_rm_wq_suspend_resume_work_type *ipa_rm_work = |
| 799 | container_of(work, |
| 800 | struct ipa_rm_wq_suspend_resume_work_type, |
| 801 | work); |
| 802 | IPA_RM_DBG_LOW("resume work handler: %s", |
| 803 | ipa_rm_resource_str(ipa_rm_work->resource_name)); |
| 804 | |
| 805 | if (!IPA_RM_RESORCE_IS_CONS(ipa_rm_work->resource_name)) { |
| 806 | IPA_RM_ERR("resource is not CONS\n"); |
| 807 | return; |
| 808 | } |
| 809 | IPA_ACTIVE_CLIENTS_INC_RESOURCE(ipa_rm_resource_str( |
| 810 | ipa_rm_work->resource_name)); |
| 811 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 812 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 813 | ipa_rm_work->resource_name, |
| 814 | &resource) != 0){ |
| 815 | IPA_RM_ERR("resource does not exists\n"); |
| 816 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 817 | IPA_ACTIVE_CLIENTS_DEC_RESOURCE(ipa_rm_resource_str( |
| 818 | ipa_rm_work->resource_name)); |
| 819 | goto bail; |
| 820 | } |
| 821 | ipa_rm_resource_consumer_request_work( |
| 822 | (struct ipa_rm_resource_cons *)resource, |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame^] | 823 | ipa_rm_work->prev_state, ipa_rm_work->needed_bw, true, |
| 824 | ipa_rm_work->inc_usage_count); |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 825 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 826 | bail: |
| 827 | kfree(ipa_rm_work); |
| 828 | } |
| 829 | |
| 830 | |
| 831 | static void ipa_rm_wq_suspend_handler(struct work_struct *work) |
| 832 | { |
| 833 | unsigned long flags; |
| 834 | struct ipa_rm_resource *resource; |
| 835 | struct ipa_rm_wq_suspend_resume_work_type *ipa_rm_work = |
| 836 | container_of(work, |
| 837 | struct ipa_rm_wq_suspend_resume_work_type, |
| 838 | work); |
| 839 | IPA_RM_DBG_LOW("suspend work handler: %s", |
| 840 | ipa_rm_resource_str(ipa_rm_work->resource_name)); |
| 841 | |
| 842 | if (!IPA_RM_RESORCE_IS_CONS(ipa_rm_work->resource_name)) { |
| 843 | IPA_RM_ERR("resource is not CONS\n"); |
| 844 | return; |
| 845 | } |
| 846 | ipa_suspend_resource_sync(ipa_rm_work->resource_name); |
| 847 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 848 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 849 | ipa_rm_work->resource_name, |
| 850 | &resource) != 0){ |
| 851 | IPA_RM_ERR("resource does not exists\n"); |
| 852 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 853 | return; |
| 854 | } |
| 855 | ipa_rm_resource_consumer_release_work( |
| 856 | (struct ipa_rm_resource_cons *)resource, |
| 857 | ipa_rm_work->prev_state, |
| 858 | true); |
| 859 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 860 | |
| 861 | kfree(ipa_rm_work); |
| 862 | } |
| 863 | |
| 864 | /** |
| 865 | * ipa_rm_wq_send_cmd() - send a command for deferred work |
| 866 | * @wq_cmd: command that should be executed |
| 867 | * @resource_name: resource on which command should be executed |
| 868 | * @notify_registered_only: notify only clients registered by |
| 869 | * ipa_rm_register() |
| 870 | * |
| 871 | * Returns: 0 on success, negative otherwise |
| 872 | */ |
| 873 | int ipa_rm_wq_send_cmd(enum ipa_rm_wq_cmd wq_cmd, |
| 874 | enum ipa_rm_resource_name resource_name, |
| 875 | enum ipa_rm_event event, |
| 876 | bool notify_registered_only) |
| 877 | { |
| 878 | int result = -ENOMEM; |
| 879 | struct ipa_rm_wq_work_type *work = kzalloc(sizeof(*work), GFP_ATOMIC); |
| 880 | |
| 881 | if (work) { |
| 882 | INIT_WORK((struct work_struct *)work, ipa_rm_wq_handler); |
| 883 | work->wq_cmd = wq_cmd; |
| 884 | work->resource_name = resource_name; |
| 885 | work->event = event; |
| 886 | work->notify_registered_only = notify_registered_only; |
| 887 | result = queue_work(ipa_rm_ctx->ipa_rm_wq, |
| 888 | (struct work_struct *)work); |
| 889 | } else { |
| 890 | IPA_RM_ERR("no mem\n"); |
| 891 | } |
| 892 | |
| 893 | return result; |
| 894 | } |
| 895 | |
| 896 | int ipa_rm_wq_send_suspend_cmd(enum ipa_rm_resource_name resource_name, |
| 897 | enum ipa_rm_resource_state prev_state, |
| 898 | u32 needed_bw) |
| 899 | { |
| 900 | int result = -ENOMEM; |
| 901 | struct ipa_rm_wq_suspend_resume_work_type *work = kzalloc(sizeof(*work), |
| 902 | GFP_ATOMIC); |
| 903 | if (work) { |
| 904 | INIT_WORK((struct work_struct *)work, |
| 905 | ipa_rm_wq_suspend_handler); |
| 906 | work->resource_name = resource_name; |
| 907 | work->prev_state = prev_state; |
| 908 | work->needed_bw = needed_bw; |
| 909 | result = queue_work(ipa_rm_ctx->ipa_rm_wq, |
| 910 | (struct work_struct *)work); |
| 911 | } else { |
| 912 | IPA_RM_ERR("no mem\n"); |
| 913 | } |
| 914 | |
| 915 | return result; |
| 916 | } |
| 917 | |
| 918 | int ipa_rm_wq_send_resume_cmd(enum ipa_rm_resource_name resource_name, |
| 919 | enum ipa_rm_resource_state prev_state, |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame^] | 920 | u32 needed_bw, |
| 921 | bool inc_usage_count) |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 922 | { |
| 923 | int result = -ENOMEM; |
| 924 | struct ipa_rm_wq_suspend_resume_work_type *work = kzalloc(sizeof(*work), |
| 925 | GFP_ATOMIC); |
| 926 | if (work) { |
| 927 | INIT_WORK((struct work_struct *)work, ipa_rm_wq_resume_handler); |
| 928 | work->resource_name = resource_name; |
| 929 | work->prev_state = prev_state; |
| 930 | work->needed_bw = needed_bw; |
Gidon Studinski | 3021a6f | 2016-11-10 12:48:48 +0200 | [diff] [blame^] | 931 | work->inc_usage_count = inc_usage_count; |
Amir Levy | 9659e59 | 2016-10-27 18:08:27 +0300 | [diff] [blame] | 932 | result = queue_work(ipa_rm_ctx->ipa_rm_wq, |
| 933 | (struct work_struct *)work); |
| 934 | } else { |
| 935 | IPA_RM_ERR("no mem\n"); |
| 936 | } |
| 937 | |
| 938 | return result; |
| 939 | } |
| 940 | /** |
| 941 | * ipa_rm_initialize() - initialize IPA RM component |
| 942 | * |
| 943 | * Returns: 0 on success, negative otherwise |
| 944 | */ |
| 945 | int ipa_rm_initialize(void) |
| 946 | { |
| 947 | int result; |
| 948 | |
| 949 | ipa_rm_ctx = kzalloc(sizeof(*ipa_rm_ctx), GFP_KERNEL); |
| 950 | if (!ipa_rm_ctx) { |
| 951 | IPA_RM_ERR("no mem\n"); |
| 952 | result = -ENOMEM; |
| 953 | goto bail; |
| 954 | } |
| 955 | ipa_rm_ctx->ipa_rm_wq = create_singlethread_workqueue("ipa_rm_wq"); |
| 956 | if (!ipa_rm_ctx->ipa_rm_wq) { |
| 957 | IPA_RM_ERR("create workqueue failed\n"); |
| 958 | result = -ENOMEM; |
| 959 | goto create_wq_fail; |
| 960 | } |
| 961 | result = ipa_rm_dep_graph_create(&(ipa_rm_ctx->dep_graph)); |
| 962 | if (result) { |
| 963 | IPA_RM_ERR("create dependency graph failed\n"); |
| 964 | goto graph_alloc_fail; |
| 965 | } |
| 966 | spin_lock_init(&ipa_rm_ctx->ipa_rm_lock); |
| 967 | IPA_RM_DBG("SUCCESS\n"); |
| 968 | |
| 969 | return 0; |
| 970 | graph_alloc_fail: |
| 971 | destroy_workqueue(ipa_rm_ctx->ipa_rm_wq); |
| 972 | create_wq_fail: |
| 973 | kfree(ipa_rm_ctx); |
| 974 | bail: |
| 975 | return result; |
| 976 | } |
| 977 | |
| 978 | /** |
| 979 | * ipa_rm_stat() - print RM stat |
| 980 | * @buf: [in] The user buff used to print |
| 981 | * @size: [in] The size of buf |
| 982 | * Returns: number of bytes used on success, negative on failure |
| 983 | * |
| 984 | * This function is called by ipa_debugfs in order to receive |
| 985 | * a full picture of the current state of the RM |
| 986 | */ |
| 987 | |
| 988 | int ipa_rm_stat(char *buf, int size) |
| 989 | { |
| 990 | unsigned long flags; |
| 991 | int i, cnt = 0, result = EINVAL; |
| 992 | struct ipa_rm_resource *resource = NULL; |
| 993 | u32 sum_bw_prod = 0; |
| 994 | u32 sum_bw_cons = 0; |
| 995 | |
| 996 | if (!buf || size < 0) |
| 997 | return result; |
| 998 | |
| 999 | spin_lock_irqsave(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 1000 | for (i = 0; i < IPA_RM_RESOURCE_PROD_MAX; ++i) { |
| 1001 | result = ipa_rm_dep_graph_get_resource( |
| 1002 | ipa_rm_ctx->dep_graph, |
| 1003 | i, |
| 1004 | &resource); |
| 1005 | if (!result) { |
| 1006 | result = ipa_rm_resource_producer_print_stat( |
| 1007 | resource, buf + cnt, |
| 1008 | size-cnt); |
| 1009 | if (result < 0) |
| 1010 | goto bail; |
| 1011 | cnt += result; |
| 1012 | } |
| 1013 | } |
| 1014 | |
| 1015 | for (i = 0; i < IPA_RM_RESOURCE_PROD_MAX; i++) |
| 1016 | sum_bw_prod += ipa_rm_ctx->prof_vote.bw_prods[i]; |
| 1017 | |
| 1018 | for (i = 0; i < IPA_RM_RESOURCE_CONS_MAX; i++) |
| 1019 | sum_bw_cons += ipa_rm_ctx->prof_vote.bw_cons[i]; |
| 1020 | |
| 1021 | result = scnprintf(buf + cnt, size - cnt, |
| 1022 | "All prod bandwidth: %d, All cons bandwidth: %d\n", |
| 1023 | sum_bw_prod, sum_bw_cons); |
| 1024 | cnt += result; |
| 1025 | |
| 1026 | result = scnprintf(buf + cnt, size - cnt, |
| 1027 | "Voting: voltage %d, bandwidth %d\n", |
| 1028 | ipa_rm_ctx->prof_vote.curr_volt, |
| 1029 | ipa_rm_ctx->prof_vote.curr_bw); |
| 1030 | cnt += result; |
| 1031 | |
| 1032 | result = cnt; |
| 1033 | bail: |
| 1034 | spin_unlock_irqrestore(&ipa_rm_ctx->ipa_rm_lock, flags); |
| 1035 | |
| 1036 | return result; |
| 1037 | } |
| 1038 | |
| 1039 | /** |
| 1040 | * ipa_rm_resource_str() - returns string that represent the resource |
| 1041 | * @resource_name: [in] resource name |
| 1042 | */ |
| 1043 | const char *ipa_rm_resource_str(enum ipa_rm_resource_name resource_name) |
| 1044 | { |
| 1045 | if (resource_name < 0 || resource_name >= IPA_RM_RESOURCE_MAX) |
| 1046 | return "INVALID RESOURCE"; |
| 1047 | |
| 1048 | return resource_name_to_str[resource_name]; |
| 1049 | }; |
| 1050 | |
| 1051 | static void ipa_rm_perf_profile_notify_to_ipa_work(struct work_struct *work) |
| 1052 | { |
| 1053 | struct ipa_rm_notify_ipa_work_type *notify_work = container_of(work, |
| 1054 | struct ipa_rm_notify_ipa_work_type, |
| 1055 | work); |
| 1056 | int res; |
| 1057 | |
| 1058 | IPA_RM_DBG_LOW("calling to IPA driver. voltage %d bandwidth %d\n", |
| 1059 | notify_work->volt, notify_work->bandwidth_mbps); |
| 1060 | |
| 1061 | res = ipa_set_required_perf_profile(notify_work->volt, |
| 1062 | notify_work->bandwidth_mbps); |
| 1063 | if (res) { |
| 1064 | IPA_RM_ERR("ipa_set_required_perf_profile failed %d\n", res); |
| 1065 | goto bail; |
| 1066 | } |
| 1067 | |
| 1068 | IPA_RM_DBG_LOW("IPA driver notified\n"); |
| 1069 | bail: |
| 1070 | kfree(notify_work); |
| 1071 | } |
| 1072 | |
| 1073 | static void ipa_rm_perf_profile_notify_to_ipa(enum ipa_voltage_level volt, |
| 1074 | u32 bandwidth) |
| 1075 | { |
| 1076 | struct ipa_rm_notify_ipa_work_type *work; |
| 1077 | |
| 1078 | work = kzalloc(sizeof(*work), GFP_ATOMIC); |
| 1079 | if (!work) { |
| 1080 | IPA_RM_ERR("no mem\n"); |
| 1081 | return; |
| 1082 | } |
| 1083 | |
| 1084 | INIT_WORK(&work->work, ipa_rm_perf_profile_notify_to_ipa_work); |
| 1085 | work->volt = volt; |
| 1086 | work->bandwidth_mbps = bandwidth; |
| 1087 | queue_work(ipa_rm_ctx->ipa_rm_wq, &work->work); |
| 1088 | } |
| 1089 | |
| 1090 | /** |
| 1091 | * ipa_rm_perf_profile_change() - change performance profile vote for resource |
| 1092 | * @resource_name: [in] resource name |
| 1093 | * |
| 1094 | * change bandwidth and voltage vote based on resource state. |
| 1095 | */ |
| 1096 | void ipa_rm_perf_profile_change(enum ipa_rm_resource_name resource_name) |
| 1097 | { |
| 1098 | enum ipa_voltage_level old_volt; |
| 1099 | u32 *bw_ptr; |
| 1100 | u32 old_bw; |
| 1101 | struct ipa_rm_resource *resource; |
| 1102 | int i; |
| 1103 | u32 sum_bw_prod = 0; |
| 1104 | u32 sum_bw_cons = 0; |
| 1105 | |
| 1106 | IPA_RM_DBG_LOW("%s\n", ipa_rm_resource_str(resource_name)); |
| 1107 | |
| 1108 | if (ipa_rm_dep_graph_get_resource(ipa_rm_ctx->dep_graph, |
| 1109 | resource_name, |
| 1110 | &resource) != 0) { |
| 1111 | IPA_RM_ERR("resource does not exists\n"); |
| 1112 | WARN_ON(1); |
| 1113 | return; |
| 1114 | } |
| 1115 | |
| 1116 | old_volt = ipa_rm_ctx->prof_vote.curr_volt; |
| 1117 | old_bw = ipa_rm_ctx->prof_vote.curr_bw; |
| 1118 | |
| 1119 | if (IPA_RM_RESORCE_IS_PROD(resource_name)) { |
| 1120 | bw_ptr = &ipa_rm_ctx->prof_vote.bw_prods[resource_name]; |
| 1121 | } else if (IPA_RM_RESORCE_IS_CONS(resource_name)) { |
| 1122 | bw_ptr = &ipa_rm_ctx->prof_vote.bw_cons[ |
| 1123 | resource_name - IPA_RM_RESOURCE_PROD_MAX]; |
| 1124 | } else { |
| 1125 | IPA_RM_ERR("Invalid resource_name\n"); |
| 1126 | return; |
| 1127 | } |
| 1128 | |
| 1129 | switch (resource->state) { |
| 1130 | case IPA_RM_GRANTED: |
| 1131 | case IPA_RM_REQUEST_IN_PROGRESS: |
| 1132 | IPA_RM_DBG_LOW("max_bw = %d, needed_bw = %d\n", |
| 1133 | resource->max_bw, resource->needed_bw); |
| 1134 | *bw_ptr = min(resource->max_bw, resource->needed_bw); |
| 1135 | ipa_rm_ctx->prof_vote.volt[resource_name] = |
| 1136 | resource->floor_voltage; |
| 1137 | break; |
| 1138 | |
| 1139 | case IPA_RM_RELEASE_IN_PROGRESS: |
| 1140 | case IPA_RM_RELEASED: |
| 1141 | *bw_ptr = 0; |
| 1142 | ipa_rm_ctx->prof_vote.volt[resource_name] = 0; |
| 1143 | break; |
| 1144 | |
| 1145 | default: |
| 1146 | IPA_RM_ERR("unknown state %d\n", resource->state); |
| 1147 | WARN_ON(1); |
| 1148 | return; |
| 1149 | } |
| 1150 | IPA_RM_DBG_LOW("resource bandwidth: %d voltage: %d\n", *bw_ptr, |
| 1151 | resource->floor_voltage); |
| 1152 | |
| 1153 | ipa_rm_ctx->prof_vote.curr_volt = IPA_VOLTAGE_UNSPECIFIED; |
| 1154 | for (i = 0; i < IPA_RM_RESOURCE_MAX; i++) { |
| 1155 | if (ipa_rm_ctx->prof_vote.volt[i] > |
| 1156 | ipa_rm_ctx->prof_vote.curr_volt) { |
| 1157 | ipa_rm_ctx->prof_vote.curr_volt = |
| 1158 | ipa_rm_ctx->prof_vote.volt[i]; |
| 1159 | } |
| 1160 | } |
| 1161 | |
| 1162 | for (i = 0; i < IPA_RM_RESOURCE_PROD_MAX; i++) |
| 1163 | sum_bw_prod += ipa_rm_ctx->prof_vote.bw_prods[i]; |
| 1164 | |
| 1165 | for (i = 0; i < IPA_RM_RESOURCE_CONS_MAX; i++) |
| 1166 | sum_bw_cons += ipa_rm_ctx->prof_vote.bw_cons[i]; |
| 1167 | |
| 1168 | IPA_RM_DBG_LOW("all prod bandwidth: %d all cons bandwidth: %d\n", |
| 1169 | sum_bw_prod, sum_bw_cons); |
| 1170 | ipa_rm_ctx->prof_vote.curr_bw = min(sum_bw_prod, sum_bw_cons); |
| 1171 | |
| 1172 | if (ipa_rm_ctx->prof_vote.curr_volt == old_volt && |
| 1173 | ipa_rm_ctx->prof_vote.curr_bw == old_bw) { |
| 1174 | IPA_RM_DBG_LOW("same voting\n"); |
| 1175 | return; |
| 1176 | } |
| 1177 | |
| 1178 | IPA_RM_DBG_LOW("new voting: voltage %d bandwidth %d\n", |
| 1179 | ipa_rm_ctx->prof_vote.curr_volt, |
| 1180 | ipa_rm_ctx->prof_vote.curr_bw); |
| 1181 | |
| 1182 | ipa_rm_perf_profile_notify_to_ipa(ipa_rm_ctx->prof_vote.curr_volt, |
| 1183 | ipa_rm_ctx->prof_vote.curr_bw); |
| 1184 | |
| 1185 | return; |
| 1186 | }; |
| 1187 | /** |
| 1188 | * ipa_rm_exit() - free all IPA RM resources |
| 1189 | */ |
| 1190 | void ipa_rm_exit(void) |
| 1191 | { |
| 1192 | IPA_RM_DBG("ENTER\n"); |
| 1193 | ipa_rm_dep_graph_delete(ipa_rm_ctx->dep_graph); |
| 1194 | destroy_workqueue(ipa_rm_ctx->ipa_rm_wq); |
| 1195 | kfree(ipa_rm_ctx); |
| 1196 | ipa_rm_ctx = NULL; |
| 1197 | IPA_RM_DBG("EXIT\n"); |
| 1198 | } |