drm/scheduler: add a pointer to scheduler in the rq

This patch is in preparation for a better load balancing in
scheduler. It allows us to associate entities with the
run queues instead of binding them to a scheduler.

Signed-off-by: Nayan Deshmukh <nayan26deshmukh@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 6 insertions, 2 deletions

diff --git a/drivers/gpu/drm/scheduler/gpu_scheduler.c b/drivers/gpu/drm/scheduler/gpu_scheduler.c
index 7d2560699b84..429b1328653a 100644
--- a/drivers/gpu/drm/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/scheduler/gpu_scheduler.c
@@ -69,11 +69,13 @@ static void drm_sched_process_job(struct dma_fence *f, struct dma_fence_cb *cb);
  *
  * Initializes a scheduler runqueue.
  */
-static void drm_sched_rq_init(struct drm_sched_rq *rq)
+static void drm_sched_rq_init(struct drm_gpu_scheduler *sched,
+                              struct drm_sched_rq *rq)
 {
         spin_lock_init(&rq->lock);
         INIT_LIST_HEAD(&rq->entities);
         rq->current_entity = NULL;
+        rq->sched = sched;
 }
 
 /**
@@ -926,7 +928,7 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
         sched->timeout = timeout;
         sched->hang_limit = hang_limit;
         for (i = DRM_SCHED_PRIORITY_MIN; i < DRM_SCHED_PRIORITY_MAX; i++)
-                drm_sched_rq_init(&sched->sched_rq[i]);
+                drm_sched_rq_init(sched, &sched->sched_rq[i]);
 
         init_waitqueue_head(&sched->wake_up_worker);
         init_waitqueue_head(&sched->job_scheduled);
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
index 4214ceb71c05..43e93d6077cf 100644
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -93,6 +93,7 @@ struct drm_sched_entity {
  * struct drm_sched_rq - queue of entities to be scheduled.
  *
  * @lock: to modify the entities list.
+ * @sched: the scheduler to which this rq belongs to.
  * @entities: list of the entities to be scheduled.
  * @current_entity: the entity which is to be scheduled.
  *
@@ -102,6 +103,7 @@ struct drm_sched_entity {
  */
 struct drm_sched_rq {
         spinlock_t                      lock;
+        struct drm_gpu_scheduler        *sched;
         struct list_head                entities;
         struct drm_sched_entity         *current_entity;
 };