drivers/gpu/drm/scheduler/sched_entity.c

   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 #include <linux/kthread.h>
  25 #include <linux/slab.h>
  26 #include <linux/completion.h>
  27
  28 #include <drm/drm_print.h>
  29 #include <drm/gpu_scheduler.h>
  30
  31 #include "gpu_scheduler_trace.h"
  32
  33 #define to_drm_sched_job(sched_job)             \
  34                 container_of((sched_job), struct drm_sched_job, queue_node)
  35
  36 /**
  37  * drm_sched_entity_init - Init a context entity used by scheduler when
  38  * submit to HW ring.
  39  *
  40  * @entity: scheduler entity to init
  41  * @priority: priority of the entity
  42  * @sched_list: the list of drm scheds on which jobs from this
  43  *           entity can be submitted
  44  * @num_sched_list: number of drm sched in sched_list
  45  * @guilty: atomic_t set to 1 when a job on this queue
  46  *          is found to be guilty causing a timeout
  47  *
  48  * Note that the &sched_list must have at least one element to schedule the entity.
  49  *
  50  * For changing @priority later on at runtime see
  51  * drm_sched_entity_set_priority(). For changing the set of schedulers
  52  * @sched_list at runtime see drm_sched_entity_modify_sched().
  53  *
  54  * An entity is cleaned up by calling drm_sched_entity_fini(). See also
  55  * drm_sched_entity_destroy().
  56  *
  57  * Returns 0 on success or a negative error code on failure.
  58  */
  59 int drm_sched_entity_init(struct drm_sched_entity *entity,
  60                           enum drm_sched_priority priority,
  61                           struct drm_gpu_scheduler **sched_list,
  62                           unsigned int num_sched_list,
  63                           atomic_t *guilty)
  64 {
  65         if (!(entity && sched_list && (num_sched_list == 0 || sched_list[0])))
  66                 return -EINVAL;
  67
  68         memset(entity, 0, sizeof(struct drm_sched_entity));
  69         INIT_LIST_HEAD(&entity->list);
  70         entity->rq = NULL;
  71         entity->guilty = guilty;
  72         entity->num_sched_list = num_sched_list;
  73         entity->priority = priority;
  74         /*
  75          * It's perfectly valid to initialize an entity without having a valid
  76          * scheduler attached. It's just not valid to use the scheduler before it
  77          * is initialized itself.
  78          */
  79         entity->sched_list = num_sched_list > 1 ? sched_list : NULL;
  80         RCU_INIT_POINTER(entity->last_scheduled, NULL);
  81         RB_CLEAR_NODE(&entity->rb_tree_node);
  82
  83         if (num_sched_list && !sched_list[0]->sched_rq) {
  84                 /* Since every entry covered by num_sched_list
  85                  * should be non-NULL and therefore we warn drivers
  86                  * not to do this and to fix their DRM calling order.
  87                  */
  88                 pr_warn("%s: called with uninitialized scheduler\n", __func__);
  89         } else if (num_sched_list) {
  90                 /* The "priority" of an entity cannot exceed the number of run-queues of a
  91                  * scheduler. Protect against num_rqs being 0, by converting to signed. Choose
  92                  * the lowest priority available.
  93                  */
  94                 if (entity->priority >= sched_list[0]->num_rqs) {
  95                         drm_err(sched_list[0], "entity with out-of-bounds priority:%u num_rqs:%u\n",
  96                                 entity->priority, sched_list[0]->num_rqs);
  97                         entity->priority = max_t(s32, (s32) sched_list[0]->num_rqs - 1,
  98                                                  (s32) DRM_SCHED_PRIORITY_KERNEL);
  99                 }
 100                 entity->rq = sched_list[0]->sched_rq[entity->priority];
 101         }
 102
 103         init_completion(&entity->entity_idle);
 104
 105         /* We start in an idle state. */
 106         complete_all(&entity->entity_idle);
 107
 108         spin_lock_init(&entity->lock);
 109         spsc_queue_init(&entity->job_queue);
 110
 111         atomic_set(&entity->fence_seq, 0);
 112         entity->fence_context = dma_fence_context_alloc(2);
 113
 114         return 0;
 115 }
 116 EXPORT_SYMBOL(drm_sched_entity_init);
 117
 118 /**
 119  * drm_sched_entity_modify_sched - Modify sched of an entity
 120  * @entity: scheduler entity to init
 121  * @sched_list: the list of new drm scheds which will replace
 122  *               existing entity->sched_list
 123  * @num_sched_list: number of drm sched in sched_list
 124  *
 125  * Note that this must be called under the same common lock for @entity as
 126  * drm_sched_job_arm() and drm_sched_entity_push_job(), or the driver needs to
 127  * guarantee through some other means that this is never called while new jobs
 128  * can be pushed to @entity.
 129  */
 130 void drm_sched_entity_modify_sched(struct drm_sched_entity *entity,
 131                                     struct drm_gpu_scheduler **sched_list,
 132                                     unsigned int num_sched_list)
 133 {
 134         WARN_ON(!num_sched_list || !sched_list);
 135
 136         spin_lock(&entity->lock);
 137         entity->sched_list = sched_list;
 138         entity->num_sched_list = num_sched_list;
 139         spin_unlock(&entity->lock);
 140 }
 141 EXPORT_SYMBOL(drm_sched_entity_modify_sched);
 142
 143 static bool drm_sched_entity_is_idle(struct drm_sched_entity *entity)
 144 {
 145         rmb(); /* for list_empty to work without lock */
 146
 147         if (list_empty(&entity->list) ||
 148             spsc_queue_count(&entity->job_queue) == 0 ||
 149             entity->stopped)
 150                 return true;
 151
 152         return false;
 153 }
 154
 155 /* Return true if entity could provide a job. */
 156 bool drm_sched_entity_is_ready(struct drm_sched_entity *entity)
 157 {
 158         if (spsc_queue_peek(&entity->job_queue) == NULL)
 159                 return false;
 160
 161         if (READ_ONCE(entity->dependency))
 162                 return false;
 163
 164         return true;
 165 }
 166
 167 /**
 168  * drm_sched_entity_error - return error of last scheduled job
 169  * @entity: scheduler entity to check
 170  *
 171  * Opportunistically return the error of the last scheduled job. Result can
 172  * change any time when new jobs are pushed to the hw.
 173  */
 174 int drm_sched_entity_error(struct drm_sched_entity *entity)
 175 {
 176         struct dma_fence *fence;
 177         int r;
 178
 179         rcu_read_lock();
 180         fence = rcu_dereference(entity->last_scheduled);
 181         r = fence ? fence->error : 0;
 182         rcu_read_unlock();
 183
 184         return r;
 185 }
 186 EXPORT_SYMBOL(drm_sched_entity_error);
 187
 188 static void drm_sched_entity_kill_jobs_work(struct work_struct *wrk)
 189 {
 190         struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
 191
 192         drm_sched_fence_finished(job->s_fence, -ESRCH);
 193         WARN_ON(job->s_fence->parent);
 194         job->sched->ops->free_job(job);
 195 }
 196
 197 /* Signal the scheduler finished fence when the entity in question is killed. */
 198 static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
 199                                           struct dma_fence_cb *cb)
 200 {
 201         struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
 202                                                  finish_cb);
 203         unsigned long index;
 204
 205         dma_fence_put(f);
 206
 207         /* Wait for all dependencies to avoid data corruptions */
 208         xa_for_each(&job->dependencies, index, f) {
 209                 struct drm_sched_fence *s_fence = to_drm_sched_fence(f);
 210
 211                 if (s_fence && f == &s_fence->scheduled) {
 212                         /* The dependencies array had a reference on the scheduled
 213                          * fence, and the finished fence refcount might have
 214                          * dropped to zero. Use dma_fence_get_rcu() so we get
 215                          * a NULL fence in that case.
 216                          */
 217                         f = dma_fence_get_rcu(&s_fence->finished);
 218
 219                         /* Now that we have a reference on the finished fence,
 220                          * we can release the reference the dependencies array
 221                          * had on the scheduled fence.
 222                          */
 223                         dma_fence_put(&s_fence->scheduled);
 224                 }
 225
 226                 xa_erase(&job->dependencies, index);
 227                 if (f && !dma_fence_add_callback(f, &job->finish_cb,
 228                                                  drm_sched_entity_kill_jobs_cb))
 229                         return;
 230
 231                 dma_fence_put(f);
 232         }
 233
 234         INIT_WORK(&job->work, drm_sched_entity_kill_jobs_work);
 235         schedule_work(&job->work);
 236 }
 237
 238 /* Remove the entity from the scheduler and kill all pending jobs */
 239 static void drm_sched_entity_kill(struct drm_sched_entity *entity)
 240 {
 241         struct drm_sched_job *job;
 242         struct dma_fence *prev;
 243
 244         if (!entity->rq)
 245                 return;
 246
 247         spin_lock(&entity->lock);
 248         entity->stopped = true;
 249         drm_sched_rq_remove_entity(entity->rq, entity);
 250         spin_unlock(&entity->lock);
 251
 252         /* Make sure this entity is not used by the scheduler at the moment */
 253         wait_for_completion(&entity->entity_idle);
 254
 255         /* The entity is guaranteed to not be used by the scheduler */
 256         prev = rcu_dereference_check(entity->last_scheduled, true);
 257         dma_fence_get(prev);
 258         while ((job = to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
 259                 struct drm_sched_fence *s_fence = job->s_fence;
 260
 261                 dma_fence_get(&s_fence->finished);
 262                 if (!prev || dma_fence_add_callback(prev, &job->finish_cb,
 263                                            drm_sched_entity_kill_jobs_cb))
 264                         drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
 265
 266                 prev = &s_fence->finished;
 267         }
 268         dma_fence_put(prev);
 269 }
 270
 271 /**
 272  * drm_sched_entity_flush - Flush a context entity
 273  *
 274  * @entity: scheduler entity
 275  * @timeout: time to wait in for Q to become empty in jiffies.
 276  *
 277  * Splitting drm_sched_entity_fini() into two functions, The first one does the
 278  * waiting, removes the entity from the runqueue and returns an error when the
 279  * process was killed.
 280  *
 281  * Returns the remaining time in jiffies left from the input timeout
 282  */
 283 long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout)
 284 {
 285         struct drm_gpu_scheduler *sched;
 286         struct task_struct *last_user;
 287         long ret = timeout;
 288
 289         if (!entity->rq)
 290                 return 0;
 291
 292         sched = entity->rq->sched;
 293         /**
 294          * The client will not queue more IBs during this fini, consume existing
 295          * queued IBs or discard them on SIGKILL
 296          */
 297         if (current->flags & PF_EXITING) {
 298                 if (timeout)
 299                         ret = wait_event_timeout(
 300                                         sched->job_scheduled,
 301                                         drm_sched_entity_is_idle(entity),
 302                                         timeout);
 303         } else {
 304                 wait_event_killable(sched->job_scheduled,
 305                                     drm_sched_entity_is_idle(entity));
 306         }
 307
 308         /* For killed process disable any more IBs enqueue right now */
 309         last_user = cmpxchg(&entity->last_user, current->group_leader, NULL);
 310         if ((!last_user || last_user == current->group_leader) &&
 311             (current->flags & PF_EXITING) && (current->exit_code == SIGKILL))
 312                 drm_sched_entity_kill(entity);
 313
 314         return ret;
 315 }
 316 EXPORT_SYMBOL(drm_sched_entity_flush);
 317
 318 /**
 319  * drm_sched_entity_fini - Destroy a context entity
 320  *
 321  * @entity: scheduler entity
 322  *
 323  * Cleanups up @entity which has been initialized by drm_sched_entity_init().
 324  *
 325  * If there are potentially job still in flight or getting newly queued
 326  * drm_sched_entity_flush() must be called first. This function then goes over
 327  * the entity and signals all jobs with an error code if the process was killed.
 328  */
 329 void drm_sched_entity_fini(struct drm_sched_entity *entity)
 330 {
 331         /*
 332          * If consumption of existing IBs wasn't completed. Forcefully remove
 333          * them here. Also makes sure that the scheduler won't touch this entity
 334          * any more.
 335          */
 336         drm_sched_entity_kill(entity);
 337
 338         if (entity->dependency) {
 339                 dma_fence_remove_callback(entity->dependency, &entity->cb);
 340                 dma_fence_put(entity->dependency);
 341                 entity->dependency = NULL;
 342         }
 343
 344         dma_fence_put(rcu_dereference_check(entity->last_scheduled, true));
 345         RCU_INIT_POINTER(entity->last_scheduled, NULL);
 346 }
 347 EXPORT_SYMBOL(drm_sched_entity_fini);
 348
 349 /**
 350  * drm_sched_entity_destroy - Destroy a context entity
 351  * @entity: scheduler entity
 352  *
 353  * Calls drm_sched_entity_flush() and drm_sched_entity_fini() as a
 354  * convenience wrapper.
 355  */
 356 void drm_sched_entity_destroy(struct drm_sched_entity *entity)
 357 {
 358         drm_sched_entity_flush(entity, MAX_WAIT_SCHED_ENTITY_Q_EMPTY);
 359         drm_sched_entity_fini(entity);
 360 }
 361 EXPORT_SYMBOL(drm_sched_entity_destroy);
 362
 363 /* drm_sched_entity_clear_dep - callback to clear the entities dependency */
 364 static void drm_sched_entity_clear_dep(struct dma_fence *f,
 365                                        struct dma_fence_cb *cb)
 366 {
 367         struct drm_sched_entity *entity =
 368                 container_of(cb, struct drm_sched_entity, cb);
 369
 370         entity->dependency = NULL;
 371         dma_fence_put(f);
 372 }
 373
 374 /*
 375  * drm_sched_entity_wakeup - callback to clear the entity's dependency and
 376  * wake up the scheduler
 377  */
 378 static void drm_sched_entity_wakeup(struct dma_fence *f,
 379                                     struct dma_fence_cb *cb)
 380 {
 381         struct drm_sched_entity *entity =
 382                 container_of(cb, struct drm_sched_entity, cb);
 383
 384         drm_sched_entity_clear_dep(f, cb);
 385         drm_sched_wakeup(entity->rq->sched);
 386 }
 387
 388 /**
 389  * drm_sched_entity_set_priority - Sets priority of the entity
 390  *
 391  * @entity: scheduler entity
 392  * @priority: scheduler priority
 393  *
 394  * Update the priority of runqueues used for the entity.
 395  */
 396 void drm_sched_entity_set_priority(struct drm_sched_entity *entity,
 397                                    enum drm_sched_priority priority)
 398 {
 399         spin_lock(&entity->lock);
 400         entity->priority = priority;
 401         spin_unlock(&entity->lock);
 402 }
 403 EXPORT_SYMBOL(drm_sched_entity_set_priority);
 404
 405 /*
 406  * Add a callback to the current dependency of the entity to wake up the
 407  * scheduler when the entity becomes available.
 408  */
 409 static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
 410 {
 411         struct drm_gpu_scheduler *sched = entity->rq->sched;
 412         struct dma_fence *fence = entity->dependency;
 413         struct drm_sched_fence *s_fence;
 414
 415         if (fence->context == entity->fence_context ||
 416             fence->context == entity->fence_context + 1) {
 417                 /*
 418                  * Fence is a scheduled/finished fence from a job
 419                  * which belongs to the same entity, we can ignore
 420                  * fences from ourself
 421                  */
 422                 dma_fence_put(entity->dependency);
 423                 return false;
 424         }
 425
 426         s_fence = to_drm_sched_fence(fence);
 427         if (!fence->error && s_fence && s_fence->sched == sched &&
 428             !test_bit(DRM_SCHED_FENCE_DONT_PIPELINE, &fence->flags)) {
 429
 430                 /*
 431                  * Fence is from the same scheduler, only need to wait for
 432                  * it to be scheduled
 433                  */
 434                 fence = dma_fence_get(&s_fence->scheduled);
 435                 dma_fence_put(entity->dependency);
 436                 entity->dependency = fence;
 437                 if (!dma_fence_add_callback(fence, &entity->cb,
 438                                             drm_sched_entity_clear_dep))
 439                         return true;
 440
 441                 /* Ignore it when it is already scheduled */
 442                 dma_fence_put(fence);
 443                 return false;
 444         }
 445
 446         if (!dma_fence_add_callback(entity->dependency, &entity->cb,
 447                                     drm_sched_entity_wakeup))
 448                 return true;
 449
 450         dma_fence_put(entity->dependency);
 451         return false;
 452 }
 453
 454 static struct dma_fence *
 455 drm_sched_job_dependency(struct drm_sched_job *job,
 456                          struct drm_sched_entity *entity)
 457 {
 458         struct dma_fence *f;
 459
 460         /* We keep the fence around, so we can iterate over all dependencies
 461          * in drm_sched_entity_kill_jobs_cb() to ensure all deps are signaled
 462          * before killing the job.
 463          */
 464         f = xa_load(&job->dependencies, job->last_dependency);
 465         if (f) {
 466                 job->last_dependency++;
 467                 return dma_fence_get(f);
 468         }
 469
 470         if (job->sched->ops->prepare_job)
 471                 return job->sched->ops->prepare_job(job, entity);
 472
 473         return NULL;
 474 }
 475
 476 struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
 477 {
 478         struct drm_sched_job *sched_job;
 479
 480         sched_job = to_drm_sched_job(spsc_queue_peek(&entity->job_queue));
 481         if (!sched_job)
 482                 return NULL;
 483
 484         while ((entity->dependency =
 485                         drm_sched_job_dependency(sched_job, entity))) {
 486                 trace_drm_sched_job_wait_dep(sched_job, entity->dependency);
 487
 488                 if (drm_sched_entity_add_dependency_cb(entity))
 489                         return NULL;
 490         }
 491
 492         /* skip jobs from entity that marked guilty */
 493         if (entity->guilty && atomic_read(entity->guilty))
 494                 dma_fence_set_error(&sched_job->s_fence->finished, -ECANCELED);
 495
 496         dma_fence_put(rcu_dereference_check(entity->last_scheduled, true));
 497         rcu_assign_pointer(entity->last_scheduled,
 498                            dma_fence_get(&sched_job->s_fence->finished));
 499
 500         /*
 501          * If the queue is empty we allow drm_sched_entity_select_rq() to
 502          * locklessly access ->last_scheduled. This only works if we set the
 503          * pointer before we dequeue and if we a write barrier here.
 504          */
 505         smp_wmb();
 506
 507         spsc_queue_pop(&entity->job_queue);
 508
 509         /*
 510          * Update the entity's location in the min heap according to
 511          * the timestamp of the next job, if any.
 512          */
 513         if (drm_sched_policy == DRM_SCHED_POLICY_FIFO) {
 514                 struct drm_sched_job *next;
 515
 516                 next = to_drm_sched_job(spsc_queue_peek(&entity->job_queue));
 517                 if (next) {
 518                         struct drm_sched_rq *rq;
 519
 520                         spin_lock(&entity->lock);
 521                         rq = entity->rq;
 522                         spin_lock(&rq->lock);
 523                         drm_sched_rq_update_fifo_locked(entity, rq,
 524                                                         next->submit_ts);
 525                         spin_unlock(&rq->lock);
 526                         spin_unlock(&entity->lock);
 527                 }
 528         }
 529
 530         /* Jobs and entities might have different lifecycles. Since we're
 531          * removing the job from the entities queue, set the jobs entity pointer
 532          * to NULL to prevent any future access of the entity through this job.
 533          */
 534         sched_job->entity = NULL;
 535
 536         return sched_job;
 537 }
 538
 539 void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
 540 {
 541         struct dma_fence *fence;
 542         struct drm_gpu_scheduler *sched;
 543         struct drm_sched_rq *rq;
 544
 545         /* single possible engine and already selected */
 546         if (!entity->sched_list)
 547                 return;
 548
 549         /* queue non-empty, stay on the same engine */
 550         if (spsc_queue_count(&entity->job_queue))
 551                 return;
 552
 553         /*
 554          * Only when the queue is empty are we guaranteed that the scheduler
 555          * thread cannot change ->last_scheduled. To enforce ordering we need
 556          * a read barrier here. See drm_sched_entity_pop_job() for the other
 557          * side.
 558          */
 559         smp_rmb();
 560
 561         fence = rcu_dereference_check(entity->last_scheduled, true);
 562
 563         /* stay on the same engine if the previous job hasn't finished */
 564         if (fence && !dma_fence_is_signaled(fence))
 565                 return;
 566
 567         spin_lock(&entity->lock);
 568         sched = drm_sched_pick_best(entity->sched_list, entity->num_sched_list);
 569         rq = sched ? sched->sched_rq[entity->priority] : NULL;
 570         if (rq != entity->rq) {
 571                 drm_sched_rq_remove_entity(entity->rq, entity);
 572                 entity->rq = rq;
 573         }
 574         spin_unlock(&entity->lock);
 575
 576         if (entity->num_sched_list == 1)
 577                 entity->sched_list = NULL;
 578 }
 579
 580 /**
 581  * drm_sched_entity_push_job - Submit a job to the entity's job queue
 582  * @sched_job: job to submit
 583  *
 584  * Note: To guarantee that the order of insertion to queue matches the job's
 585  * fence sequence number this function should be called with drm_sched_job_arm()
 586  * under common lock for the struct drm_sched_entity that was set up for
 587  * @sched_job in drm_sched_job_init().
 588  */
 589 void drm_sched_entity_push_job(struct drm_sched_job *sched_job)
 590 {
 591         struct drm_sched_entity *entity = sched_job->entity;
 592         bool first;
 593         ktime_t submit_ts;
 594
 595         trace_drm_sched_job(sched_job, entity);
 596         atomic_inc(entity->rq->sched->score);
 597         WRITE_ONCE(entity->last_user, current->group_leader);
 598
 599         /*
 600          * After the sched_job is pushed into the entity queue, it may be
 601          * completed and freed up at any time. We can no longer access it.
 602          * Make sure to set the submit_ts first, to avoid a race.
 603          */
 604         sched_job->submit_ts = submit_ts = ktime_get();
 605         first = spsc_queue_push(&entity->job_queue, &sched_job->queue_node);
 606
 607         /* first job wakes up scheduler */
 608         if (first) {
 609                 struct drm_gpu_scheduler *sched;
 610                 struct drm_sched_rq *rq;
 611
 612                 /* Add the entity to the run queue */
 613                 spin_lock(&entity->lock);
 614                 if (entity->stopped) {
 615                         spin_unlock(&entity->lock);
 616
 617                         DRM_ERROR("Trying to push to a killed entity\n");
 618                         return;
 619                 }
 620
 621                 rq = entity->rq;
 622                 sched = rq->sched;
 623
 624                 spin_lock(&rq->lock);
 625                 drm_sched_rq_add_entity(rq, entity);
 626
 627                 if (drm_sched_policy == DRM_SCHED_POLICY_FIFO)
 628                         drm_sched_rq_update_fifo_locked(entity, rq, submit_ts);
 629
 630                 spin_unlock(&rq->lock);
 631                 spin_unlock(&entity->lock);
 632
 633                 drm_sched_wakeup(sched);
 634         }
 635 }
 636 EXPORT_SYMBOL(drm_sched_entity_push_job);