[RFC PATCH 1/2] drm/sched: implement drm_sched_entity_num_jobs

[Nirmoy Das <nirmoy.aiemd@gmail.com>]

Implement drm_sched_entity_num_jobs() so that drm drivers can
query number of jobs in an entity.

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
---
 drivers/gpu/drm/scheduler/sched_entity.c | 15 +++++++++++++++
 include/drm/gpu_scheduler.h              |  1 +
 2 files changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
index 90fd9c30ae5a..dfe8216f2d52 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -119,6 +119,21 @@ static bool drm_sched_entity_is_idle(struct drm_sched_entity *entity)
 	return false;
 }
 
+/**
+ * drm_sched_entity_num_job - Get number of jobs in the entity
+ *
+ * @entity: scheduler entity
+ *
+ * Returns number of jobs in the entity
+ */
+int drm_sched_entity_num_jobs(struct drm_sched_entity *entity)
+{
+	if (drm_sched_entity_is_idle(entity))
+		return 0;
+
+	return spsc_queue_count(&entity->job_queue);
+}
+EXPORT_SYMBOL(drm_sched_entity_num_jobs);
 /**
  * drm_sched_entity_is_ready - Check if entity is ready
  *
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
index d8972836d248..b5ceff75cbbe 100644
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -341,5 +341,6 @@ void drm_sched_fence_finished(struct drm_sched_fence *fence);
 unsigned long drm_sched_suspend_timeout(struct drm_gpu_scheduler *sched);
 void drm_sched_resume_timeout(struct drm_gpu_scheduler *sched,
 		                unsigned long remaining);
+int drm_sched_entity_num_jobs(struct drm_sched_entity *entity);
 
 #endif
-- 
2.25.0

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