drm/scheduler: track GPU active time per entity

Track the accumulated time that jobs from this entity were active
on the GPU. This allows drivers using the scheduler to trivially
implement the DRM fdinfo when the hardware doesn't provide more
specific information than signalling job completion anyways.

[Bagas: Append missing colon to @elapsed_ns]
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>

diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index 31f3a1267be44fbf87562b2d0c1b54398b005feb..cc5e77a30a662eee213682693cf31f4616788016 100644 (file)
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -895,6 +895,12 @@ drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
 
        spin_unlock(&sched->job_list_lock);
 
+       if (job) {
+               job->entity->elapsed_ns += ktime_to_ns(
+                       ktime_sub(job->s_fence->finished.timestamp,
+                                 job->s_fence->scheduled.timestamp));
+       }
+
        return job;
 }
 

diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
index ca857ec9e7eba39a394c7fec8f81af1e08e164ea..aa771e01f63fdd86930bea9add50a9d9fd284dc3 100644 (file)
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -228,6 +228,13 @@ struct drm_sched_entity {
         */
        struct rb_node                  rb_tree_node;
 
+       /**
+        * @elapsed_ns:
+        *
+        * Records the amount of time where jobs from this entity were active
+        * on the GPU.
+        */
+       uint64_t elapsed_ns;
 };
 
 /**