diff options
Diffstat (limited to 'include/drm/gpu_scheduler.h')
| -rw-r--r-- | include/drm/gpu_scheduler.h | 56 |
1 files changed, 50 insertions, 6 deletions
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h index dfd54fb94e10..dec655894d08 100644 --- a/include/drm/gpu_scheduler.h +++ b/include/drm/gpu_scheduler.h @@ -43,10 +43,12 @@ enum drm_sched_priority { }; /** - * A scheduler entity is a wrapper around a job queue or a group - * of other entities. Entities take turns emitting jobs from their - * job queues to corresponding hardware ring based on scheduling - * policy. + * drm_sched_entity - A wrapper around a job queue (typically attached + * to the DRM file_priv). + * + * Entities will emit jobs in order to their corresponding hardware + * ring, and the scheduler will alternate between entities based on + * scheduling policy. */ struct drm_sched_entity { struct list_head list; @@ -54,7 +56,6 @@ struct drm_sched_entity { spinlock_t rq_lock; struct drm_gpu_scheduler *sched; - spinlock_t queue_lock; struct spsc_queue job_queue; atomic_t fence_seq; @@ -63,6 +64,8 @@ struct drm_sched_entity { struct dma_fence *dependency; struct dma_fence_cb cb; atomic_t *guilty; /* points to ctx's guilty */ + int fini_status; + struct dma_fence *last_scheduled; }; /** @@ -78,7 +81,18 @@ struct drm_sched_rq { struct drm_sched_fence { struct dma_fence scheduled; + + /* This fence is what will be signaled by the scheduler when + * the job is completed. + * + * When setting up an out fence for the job, you should use + * this, since it's available immediately upon + * drm_sched_job_init(), and the fence returned by the driver + * from run_job() won't be created until the dependencies have + * resolved. + */ struct dma_fence finished; + struct dma_fence_cb cb; struct dma_fence *parent; struct drm_gpu_scheduler *sched; @@ -88,6 +102,13 @@ struct drm_sched_fence { struct drm_sched_fence *to_drm_sched_fence(struct dma_fence *f); +/** + * drm_sched_job - A job to be run by an entity. + * + * A job is created by the driver using drm_sched_job_init(), and + * should call drm_sched_entity_push_job() once it wants the scheduler + * to schedule the job. + */ struct drm_sched_job { struct spsc_node queue_node; struct drm_gpu_scheduler *sched; @@ -99,6 +120,7 @@ struct drm_sched_job { uint64_t id; atomic_t karma; enum drm_sched_priority s_priority; + struct drm_sched_entity *entity; }; static inline bool drm_sched_invalidate_job(struct drm_sched_job *s_job, @@ -112,10 +134,28 @@ static inline bool drm_sched_invalidate_job(struct drm_sched_job *s_job, * these functions should be implemented in driver side */ struct drm_sched_backend_ops { + /* Called when the scheduler is considering scheduling this + * job next, to get another struct dma_fence for this job to + * block on. Once it returns NULL, run_job() may be called. + */ struct dma_fence *(*dependency)(struct drm_sched_job *sched_job, struct drm_sched_entity *s_entity); + + /* Called to execute the job once all of the dependencies have + * been resolved. This may be called multiple times, if + * timedout_job() has happened and drm_sched_job_recovery() + * decides to try it again. + */ struct dma_fence *(*run_job)(struct drm_sched_job *sched_job); + + /* Called when a job has taken too long to execute, to trigger + * GPU recovery. + */ void (*timedout_job)(struct drm_sched_job *sched_job); + + /* Called once the job's finished fence has been signaled and + * it's time to clean it up. + */ void (*free_job)(struct drm_sched_job *sched_job); }; @@ -147,7 +187,11 @@ void drm_sched_fini(struct drm_gpu_scheduler *sched); int drm_sched_entity_init(struct drm_gpu_scheduler *sched, struct drm_sched_entity *entity, struct drm_sched_rq *rq, - uint32_t jobs, atomic_t *guilty); + atomic_t *guilty); +void drm_sched_entity_do_release(struct drm_gpu_scheduler *sched, + struct drm_sched_entity *entity); +void drm_sched_entity_cleanup(struct drm_gpu_scheduler *sched, + struct drm_sched_entity *entity); void drm_sched_entity_fini(struct drm_gpu_scheduler *sched, struct drm_sched_entity *entity); void drm_sched_entity_push_job(struct drm_sched_job *sched_job, |