1 /* 2 * Copyright 2015 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 */ 23 24 #ifndef _DRM_GPU_SCHEDULER_H_ 25 #define _DRM_GPU_SCHEDULER_H_ 26 27 #include <drm/spsc_queue.h> 28 #include <linux/dma-fence.h> 29 #include <linux/completion.h> 30 #include <linux/xarray.h> 31 #include <linux/workqueue.h> 32 33 #define MAX_WAIT_SCHED_ENTITY_Q_EMPTY msecs_to_jiffies(1000) 34 35 /** 36 * DRM_SCHED_FENCE_DONT_PIPELINE - Prevent dependency pipelining 37 * 38 * Setting this flag on a scheduler fence prevents pipelining of jobs depending 39 * on this fence. In other words we always insert a full CPU round trip before 40 * dependent jobs are pushed to the hw queue. 41 */ 42 #define DRM_SCHED_FENCE_DONT_PIPELINE DMA_FENCE_FLAG_USER_BITS 43 44 /** 45 * DRM_SCHED_FENCE_FLAG_HAS_DEADLINE_BIT - A fence deadline hint has been set 46 * 47 * Because we could have a deadline hint can be set before the backing hw 48 * fence is created, we need to keep track of whether a deadline has already 49 * been set. 50 */ 51 #define DRM_SCHED_FENCE_FLAG_HAS_DEADLINE_BIT (DMA_FENCE_FLAG_USER_BITS + 1) 52 53 enum dma_resv_usage; 54 struct dma_resv; 55 struct drm_gem_object; 56 57 struct drm_gpu_scheduler; 58 struct drm_sched_rq; 59 60 struct drm_file; 61 62 /* These are often used as an (initial) index 63 * to an array, and as such should start at 0. 64 */ 65 enum drm_sched_priority { 66 DRM_SCHED_PRIORITY_KERNEL, 67 DRM_SCHED_PRIORITY_HIGH, 68 DRM_SCHED_PRIORITY_NORMAL, 69 DRM_SCHED_PRIORITY_LOW, 70 71 DRM_SCHED_PRIORITY_COUNT 72 }; 73 74 /** 75 * struct drm_sched_entity - A wrapper around a job queue (typically 76 * attached to the DRM file_priv). 77 * 78 * Entities will emit jobs in order to their corresponding hardware 79 * ring, and the scheduler will alternate between entities based on 80 * scheduling policy. 81 */ 82 struct drm_sched_entity { 83 /** 84 * @list: 85 * 86 * Used to append this struct to the list of entities in the runqueue 87 * @rq under &drm_sched_rq.entities. 88 * 89 * Protected by &drm_sched_rq.lock of @rq. 90 */ 91 struct list_head list; 92 93 /** 94 * @lock: 95 * 96 * Lock protecting the run-queue (@rq) to which this entity belongs, 97 * @priority and the list of schedulers (@sched_list, @num_sched_list). 98 */ 99 spinlock_t lock; 100 101 /** 102 * @rq: 103 * 104 * Runqueue on which this entity is currently scheduled. 105 * 106 * FIXME: Locking is very unclear for this. Writers are protected by 107 * @lock, but readers are generally lockless and seem to just race with 108 * not even a READ_ONCE. 109 */ 110 struct drm_sched_rq *rq; 111 112 /** 113 * @sched_list: 114 * 115 * A list of schedulers (struct drm_gpu_scheduler). Jobs from this entity can 116 * be scheduled on any scheduler on this list. 117 * 118 * This can be modified by calling drm_sched_entity_modify_sched(). 119 * Locking is entirely up to the driver, see the above function for more 120 * details. 121 * 122 * This will be set to NULL if &num_sched_list equals 1 and @rq has been 123 * set already. 124 * 125 * FIXME: This means priority changes through 126 * drm_sched_entity_set_priority() will be lost henceforth in this case. 127 */ 128 struct drm_gpu_scheduler **sched_list; 129 130 /** 131 * @num_sched_list: 132 * 133 * Number of drm_gpu_schedulers in the @sched_list. 134 */ 135 unsigned int num_sched_list; 136 137 /** 138 * @priority: 139 * 140 * Priority of the entity. This can be modified by calling 141 * drm_sched_entity_set_priority(). Protected by @lock. 142 */ 143 enum drm_sched_priority priority; 144 145 /** 146 * @job_queue: the list of jobs of this entity. 147 */ 148 struct spsc_queue job_queue; 149 150 /** 151 * @fence_seq: 152 * 153 * A linearly increasing seqno incremented with each new 154 * &drm_sched_fence which is part of the entity. 155 * 156 * FIXME: Callers of drm_sched_job_arm() need to ensure correct locking, 157 * this doesn't need to be atomic. 158 */ 159 atomic_t fence_seq; 160 161 /** 162 * @fence_context: 163 * 164 * A unique context for all the fences which belong to this entity. The 165 * &drm_sched_fence.scheduled uses the fence_context but 166 * &drm_sched_fence.finished uses fence_context + 1. 167 */ 168 uint64_t fence_context; 169 170 /** 171 * @dependency: 172 * 173 * The dependency fence of the job which is on the top of the job queue. 174 */ 175 struct dma_fence *dependency; 176 177 /** 178 * @cb: 179 * 180 * Callback for the dependency fence above. 181 */ 182 struct dma_fence_cb cb; 183 184 /** 185 * @guilty: 186 * 187 * Points to entities' guilty. 188 */ 189 atomic_t *guilty; 190 191 /** 192 * @last_scheduled: 193 * 194 * Points to the finished fence of the last scheduled job. Only written 195 * by drm_sched_entity_pop_job(). Can be accessed locklessly from 196 * drm_sched_job_arm() if the queue is empty. 197 */ 198 struct dma_fence __rcu *last_scheduled; 199 200 /** 201 * @last_user: last group leader pushing a job into the entity. 202 */ 203 struct task_struct *last_user; 204 205 /** 206 * @stopped: 207 * 208 * Marks the enity as removed from rq and destined for 209 * termination. This is set by calling drm_sched_entity_flush() and by 210 * drm_sched_fini(). 211 */ 212 bool stopped; 213 214 /** 215 * @entity_idle: 216 * 217 * Signals when entity is not in use, used to sequence entity cleanup in 218 * drm_sched_entity_fini(). 219 */ 220 struct completion entity_idle; 221 222 /** 223 * @oldest_job_waiting: 224 * 225 * Marks earliest job waiting in SW queue 226 */ 227 ktime_t oldest_job_waiting; 228 229 /** 230 * @rb_tree_node: 231 * 232 * The node used to insert this entity into time based priority queue 233 */ 234 struct rb_node rb_tree_node; 235 236 }; 237 238 /** 239 * struct drm_sched_rq - queue of entities to be scheduled. 240 * 241 * @sched: the scheduler to which this rq belongs to. 242 * @lock: protects @entities, @rb_tree_root and @current_entity. 243 * @current_entity: the entity which is to be scheduled. 244 * @entities: list of the entities to be scheduled. 245 * @rb_tree_root: root of time based priority queue of entities for FIFO scheduling 246 * 247 * Run queue is a set of entities scheduling command submissions for 248 * one specific ring. It implements the scheduling policy that selects 249 * the next entity to emit commands from. 250 */ 251 struct drm_sched_rq { 252 struct drm_gpu_scheduler *sched; 253 254 spinlock_t lock; 255 /* Following members are protected by the @lock: */ 256 struct drm_sched_entity *current_entity; 257 struct list_head entities; 258 struct rb_root_cached rb_tree_root; 259 }; 260 261 /** 262 * struct drm_sched_fence - fences corresponding to the scheduling of a job. 263 */ 264 struct drm_sched_fence { 265 /** 266 * @scheduled: this fence is what will be signaled by the scheduler 267 * when the job is scheduled. 268 */ 269 struct dma_fence scheduled; 270 271 /** 272 * @finished: this fence is what will be signaled by the scheduler 273 * when the job is completed. 274 * 275 * When setting up an out fence for the job, you should use 276 * this, since it's available immediately upon 277 * drm_sched_job_init(), and the fence returned by the driver 278 * from run_job() won't be created until the dependencies have 279 * resolved. 280 */ 281 struct dma_fence finished; 282 283 /** 284 * @deadline: deadline set on &drm_sched_fence.finished which 285 * potentially needs to be propagated to &drm_sched_fence.parent 286 */ 287 ktime_t deadline; 288 289 /** 290 * @parent: the fence returned by &drm_sched_backend_ops.run_job 291 * when scheduling the job on hardware. We signal the 292 * &drm_sched_fence.finished fence once parent is signalled. 293 */ 294 struct dma_fence *parent; 295 /** 296 * @sched: the scheduler instance to which the job having this struct 297 * belongs to. 298 */ 299 struct drm_gpu_scheduler *sched; 300 /** 301 * @lock: the lock used by the scheduled and the finished fences. 302 */ 303 spinlock_t lock; 304 /** 305 * @owner: job owner for debugging 306 */ 307 void *owner; 308 309 /** 310 * @drm_client_id: 311 * 312 * The client_id of the drm_file which owns the job. 313 */ 314 uint64_t drm_client_id; 315 }; 316 317 struct drm_sched_fence *to_drm_sched_fence(struct dma_fence *f); 318 319 /** 320 * struct drm_sched_job - A job to be run by an entity. 321 * 322 * @queue_node: used to append this struct to the queue of jobs in an entity. 323 * @list: a job participates in a "pending" and "done" lists. 324 * @sched: the scheduler instance on which this job is scheduled. 325 * @s_fence: contains the fences for the scheduling of job. 326 * @finish_cb: the callback for the finished fence. 327 * @credits: the number of credits this job contributes to the scheduler 328 * @work: Helper to reschedule job kill to different context. 329 * @karma: increment on every hang caused by this job. If this exceeds the hang 330 * limit of the scheduler then the job is marked guilty and will not 331 * be scheduled further. 332 * @s_priority: the priority of the job. 333 * @entity: the entity to which this job belongs. 334 * @cb: the callback for the parent fence in s_fence. 335 * 336 * A job is created by the driver using drm_sched_job_init(), and 337 * should call drm_sched_entity_push_job() once it wants the scheduler 338 * to schedule the job. 339 */ 340 struct drm_sched_job { 341 /** 342 * @submit_ts: 343 * 344 * When the job was pushed into the entity queue. 345 */ 346 ktime_t submit_ts; 347 348 /** 349 * @sched: 350 * 351 * The scheduler this job is or will be scheduled on. Gets set by 352 * drm_sched_job_arm(). Valid until drm_sched_backend_ops.free_job() 353 * has finished. 354 */ 355 struct drm_gpu_scheduler *sched; 356 357 struct drm_sched_fence *s_fence; 358 struct drm_sched_entity *entity; 359 360 enum drm_sched_priority s_priority; 361 u32 credits; 362 /** @last_dependency: tracks @dependencies as they signal */ 363 unsigned int last_dependency; 364 atomic_t karma; 365 366 struct spsc_node queue_node; 367 struct list_head list; 368 369 /* 370 * work is used only after finish_cb has been used and will not be 371 * accessed anymore. 372 */ 373 union { 374 struct dma_fence_cb finish_cb; 375 struct work_struct work; 376 }; 377 378 struct dma_fence_cb cb; 379 380 /** 381 * @dependencies: 382 * 383 * Contains the dependencies as struct dma_fence for this job, see 384 * drm_sched_job_add_dependency() and 385 * drm_sched_job_add_implicit_dependencies(). 386 */ 387 struct xarray dependencies; 388 }; 389 390 /** 391 * enum drm_gpu_sched_stat - the scheduler's status 392 * 393 * @DRM_GPU_SCHED_STAT_NONE: Reserved. Do not use. 394 * @DRM_GPU_SCHED_STAT_RESET: The GPU hung and successfully reset. 395 * @DRM_GPU_SCHED_STAT_ENODEV: Error: Device is not available anymore. 396 * @DRM_GPU_SCHED_STAT_NO_HANG: Contrary to scheduler's assumption, the GPU 397 * did not hang and is still running. 398 */ 399 enum drm_gpu_sched_stat { 400 DRM_GPU_SCHED_STAT_NONE, 401 DRM_GPU_SCHED_STAT_RESET, 402 DRM_GPU_SCHED_STAT_ENODEV, 403 DRM_GPU_SCHED_STAT_NO_HANG, 404 }; 405 406 /** 407 * struct drm_sched_backend_ops - Define the backend operations 408 * called by the scheduler 409 * 410 * These functions should be implemented in the driver side. 411 */ 412 struct drm_sched_backend_ops { 413 /** 414 * @prepare_job: 415 * 416 * Called when the scheduler is considering scheduling this job next, to 417 * get another struct dma_fence for this job to block on. Once it 418 * returns NULL, run_job() may be called. 419 * 420 * Can be NULL if no additional preparation to the dependencies are 421 * necessary. Skipped when jobs are killed instead of run. 422 */ 423 struct dma_fence *(*prepare_job)(struct drm_sched_job *sched_job, 424 struct drm_sched_entity *s_entity); 425 426 /** 427 * @run_job: Called to execute the job once all of the dependencies 428 * have been resolved. 429 * 430 * @sched_job: the job to run 431 * 432 * The deprecated drm_sched_resubmit_jobs() (called by &struct 433 * drm_sched_backend_ops.timedout_job) can invoke this again with the 434 * same parameters. Using this is discouraged because it violates 435 * dma_fence rules, notably dma_fence_init() has to be called on 436 * already initialized fences for a second time. Moreover, this is 437 * dangerous because attempts to allocate memory might deadlock with 438 * memory management code waiting for the reset to complete. 439 * 440 * TODO: Document what drivers should do / use instead. 441 * 442 * This method is called in a workqueue context - either from the 443 * submit_wq the driver passed through drm_sched_init(), or, if the 444 * driver passed NULL, a separate, ordered workqueue the scheduler 445 * allocated. 446 * 447 * Note that the scheduler expects to 'inherit' its own reference to 448 * this fence from the callback. It does not invoke an extra 449 * dma_fence_get() on it. Consequently, this callback must take a 450 * reference for the scheduler, and additional ones for the driver's 451 * respective needs. 452 * 453 * Return: 454 * * On success: dma_fence the driver must signal once the hardware has 455 * completed the job ("hardware fence"). 456 * * On failure: NULL or an ERR_PTR. 457 */ 458 struct dma_fence *(*run_job)(struct drm_sched_job *sched_job); 459 460 /** 461 * @timedout_job: Called when a job has taken too long to execute, 462 * to trigger GPU recovery. 463 * 464 * @sched_job: The job that has timed out 465 * 466 * Drivers typically issue a reset to recover from GPU hangs. 467 * This procedure looks very different depending on whether a firmware 468 * or a hardware scheduler is being used. 469 * 470 * For a FIRMWARE SCHEDULER, each ring has one scheduler, and each 471 * scheduler has one entity. Hence, the steps taken typically look as 472 * follows: 473 * 474 * 1. Stop the scheduler using drm_sched_stop(). This will pause the 475 * scheduler workqueues and cancel the timeout work, guaranteeing 476 * that nothing is queued while the ring is being removed. 477 * 2. Remove the ring. The firmware will make sure that the 478 * corresponding parts of the hardware are resetted, and that other 479 * rings are not impacted. 480 * 3. Kill the entity and the associated scheduler. 481 * 482 * 483 * For a HARDWARE SCHEDULER, a scheduler instance schedules jobs from 484 * one or more entities to one ring. This implies that all entities 485 * associated with the affected scheduler cannot be torn down, because 486 * this would effectively also affect innocent userspace processes which 487 * did not submit faulty jobs (for example). 488 * 489 * Consequently, the procedure to recover with a hardware scheduler 490 * should look like this: 491 * 492 * 1. Stop all schedulers impacted by the reset using drm_sched_stop(). 493 * 2. Kill the entity the faulty job stems from. 494 * 3. Issue a GPU reset on all faulty rings (driver-specific). 495 * 4. Re-submit jobs on all schedulers impacted by re-submitting them to 496 * the entities which are still alive. 497 * 5. Restart all schedulers that were stopped in step #1 using 498 * drm_sched_start(). 499 * 500 * Note that some GPUs have distinct hardware queues but need to reset 501 * the GPU globally, which requires extra synchronization between the 502 * timeout handlers of different schedulers. One way to achieve this 503 * synchronization is to create an ordered workqueue (using 504 * alloc_ordered_workqueue()) at the driver level, and pass this queue 505 * as drm_sched_init()'s @timeout_wq parameter. This will guarantee 506 * that timeout handlers are executed sequentially. 507 * 508 * Return: The scheduler's status, defined by &enum drm_gpu_sched_stat 509 * 510 */ 511 enum drm_gpu_sched_stat (*timedout_job)(struct drm_sched_job *sched_job); 512 513 /** 514 * @free_job: Called once the job's finished fence has been signaled 515 * and it's time to clean it up. 516 */ 517 void (*free_job)(struct drm_sched_job *sched_job); 518 519 /** 520 * @cancel_job: Used by the scheduler to guarantee remaining jobs' fences 521 * get signaled in drm_sched_fini(). 522 * 523 * Used by the scheduler to cancel all jobs that have not been executed 524 * with &struct drm_sched_backend_ops.run_job by the time 525 * drm_sched_fini() gets invoked. 526 * 527 * Drivers need to signal the passed job's hardware fence with an 528 * appropriate error code (e.g., -ECANCELED) in this callback. They 529 * must not free the job. 530 * 531 * The scheduler will only call this callback once it stopped calling 532 * all other callbacks forever, with the exception of &struct 533 * drm_sched_backend_ops.free_job. 534 */ 535 void (*cancel_job)(struct drm_sched_job *sched_job); 536 }; 537 538 /** 539 * struct drm_gpu_scheduler - scheduler instance-specific data 540 * 541 * @ops: backend operations provided by the driver. 542 * @credit_limit: the credit limit of this scheduler 543 * @credit_count: the current credit count of this scheduler 544 * @timeout: the time after which a job is removed from the scheduler. 545 * @name: name of the ring for which this scheduler is being used. 546 * @num_rqs: Number of run-queues. This is at most DRM_SCHED_PRIORITY_COUNT, 547 * as there's usually one run-queue per priority, but could be less. 548 * @sched_rq: An allocated array of run-queues of size @num_rqs; 549 * @job_scheduled: once @drm_sched_entity_do_release is called the scheduler 550 * waits on this wait queue until all the scheduled jobs are 551 * finished. 552 * @job_id_count: used to assign unique id to the each job. 553 * @submit_wq: workqueue used to queue @work_run_job and @work_free_job 554 * @timeout_wq: workqueue used to queue @work_tdr 555 * @work_run_job: work which calls run_job op of each scheduler. 556 * @work_free_job: work which calls free_job op of each scheduler. 557 * @work_tdr: schedules a delayed call to @drm_sched_job_timedout after the 558 * timeout interval is over. 559 * @pending_list: the list of jobs which are currently in the job queue. 560 * @job_list_lock: lock to protect the pending_list. 561 * @hang_limit: once the hangs by a job crosses this limit then it is marked 562 * guilty and it will no longer be considered for scheduling. 563 * @score: score to help loadbalancer pick a idle sched 564 * @_score: score used when the driver doesn't provide one 565 * @ready: marks if the underlying HW is ready to work 566 * @free_guilty: A hit to time out handler to free the guilty job. 567 * @pause_submit: pause queuing of @work_run_job on @submit_wq 568 * @own_submit_wq: scheduler owns allocation of @submit_wq 569 * @dev: system &struct device 570 * 571 * One scheduler is implemented for each hardware ring. 572 */ 573 struct drm_gpu_scheduler { 574 const struct drm_sched_backend_ops *ops; 575 u32 credit_limit; 576 atomic_t credit_count; 577 long timeout; 578 const char *name; 579 u32 num_rqs; 580 struct drm_sched_rq **sched_rq; 581 wait_queue_head_t job_scheduled; 582 atomic64_t job_id_count; 583 struct workqueue_struct *submit_wq; 584 struct workqueue_struct *timeout_wq; 585 struct work_struct work_run_job; 586 struct work_struct work_free_job; 587 struct delayed_work work_tdr; 588 struct list_head pending_list; 589 spinlock_t job_list_lock; 590 int hang_limit; 591 atomic_t *score; 592 atomic_t _score; 593 bool ready; 594 bool free_guilty; 595 bool pause_submit; 596 bool own_submit_wq; 597 struct device *dev; 598 }; 599 600 /** 601 * struct drm_sched_init_args - parameters for initializing a DRM GPU scheduler 602 * 603 * @ops: backend operations provided by the driver 604 * @submit_wq: workqueue to use for submission. If NULL, an ordered wq is 605 * allocated and used. 606 * @num_rqs: Number of run-queues. This may be at most DRM_SCHED_PRIORITY_COUNT, 607 * as there's usually one run-queue per priority, but may be less. 608 * @credit_limit: the number of credits this scheduler can hold from all jobs 609 * @hang_limit: number of times to allow a job to hang before dropping it. 610 * This mechanism is DEPRECATED. Set it to 0. 611 * @timeout: timeout value in jiffies for submitted jobs. 612 * @timeout_wq: workqueue to use for timeout work. If NULL, the system_wq is used. 613 * @score: score atomic shared with other schedulers. May be NULL. 614 * @name: name (typically the driver's name). Used for debugging 615 * @dev: associated device. Used for debugging 616 */ 617 struct drm_sched_init_args { 618 const struct drm_sched_backend_ops *ops; 619 struct workqueue_struct *submit_wq; 620 struct workqueue_struct *timeout_wq; 621 u32 num_rqs; 622 u32 credit_limit; 623 unsigned int hang_limit; 624 long timeout; 625 atomic_t *score; 626 const char *name; 627 struct device *dev; 628 }; 629 630 /* Scheduler operations */ 631 632 int drm_sched_init(struct drm_gpu_scheduler *sched, 633 const struct drm_sched_init_args *args); 634 635 void drm_sched_fini(struct drm_gpu_scheduler *sched); 636 637 unsigned long drm_sched_suspend_timeout(struct drm_gpu_scheduler *sched); 638 void drm_sched_resume_timeout(struct drm_gpu_scheduler *sched, 639 unsigned long remaining); 640 void drm_sched_tdr_queue_imm(struct drm_gpu_scheduler *sched); 641 bool drm_sched_wqueue_ready(struct drm_gpu_scheduler *sched); 642 void drm_sched_wqueue_stop(struct drm_gpu_scheduler *sched); 643 void drm_sched_wqueue_start(struct drm_gpu_scheduler *sched); 644 void drm_sched_stop(struct drm_gpu_scheduler *sched, struct drm_sched_job *bad); 645 void drm_sched_start(struct drm_gpu_scheduler *sched, int errno); 646 void drm_sched_resubmit_jobs(struct drm_gpu_scheduler *sched); 647 void drm_sched_fault(struct drm_gpu_scheduler *sched); 648 649 struct drm_gpu_scheduler * 650 drm_sched_pick_best(struct drm_gpu_scheduler **sched_list, 651 unsigned int num_sched_list); 652 653 /* Jobs */ 654 655 int drm_sched_job_init(struct drm_sched_job *job, 656 struct drm_sched_entity *entity, 657 u32 credits, void *owner, 658 u64 drm_client_id); 659 void drm_sched_job_arm(struct drm_sched_job *job); 660 void drm_sched_entity_push_job(struct drm_sched_job *sched_job); 661 int drm_sched_job_add_dependency(struct drm_sched_job *job, 662 struct dma_fence *fence); 663 int drm_sched_job_add_syncobj_dependency(struct drm_sched_job *job, 664 struct drm_file *file, 665 u32 handle, 666 u32 point); 667 int drm_sched_job_add_resv_dependencies(struct drm_sched_job *job, 668 struct dma_resv *resv, 669 enum dma_resv_usage usage); 670 int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job, 671 struct drm_gem_object *obj, 672 bool write); 673 bool drm_sched_job_has_dependency(struct drm_sched_job *job, 674 struct dma_fence *fence); 675 void drm_sched_job_cleanup(struct drm_sched_job *job); 676 void drm_sched_increase_karma(struct drm_sched_job *bad); 677 678 static inline bool drm_sched_invalidate_job(struct drm_sched_job *s_job, 679 int threshold) 680 { 681 return s_job && atomic_inc_return(&s_job->karma) > threshold; 682 } 683 684 /* Entities */ 685 686 int drm_sched_entity_init(struct drm_sched_entity *entity, 687 enum drm_sched_priority priority, 688 struct drm_gpu_scheduler **sched_list, 689 unsigned int num_sched_list, 690 atomic_t *guilty); 691 long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout); 692 void drm_sched_entity_fini(struct drm_sched_entity *entity); 693 void drm_sched_entity_destroy(struct drm_sched_entity *entity); 694 void drm_sched_entity_set_priority(struct drm_sched_entity *entity, 695 enum drm_sched_priority priority); 696 int drm_sched_entity_error(struct drm_sched_entity *entity); 697 void drm_sched_entity_modify_sched(struct drm_sched_entity *entity, 698 struct drm_gpu_scheduler **sched_list, 699 unsigned int num_sched_list); 700 701 #endif 702