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drm/sched: Add boolean to mark if sched is ready to work v5

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Problem:
A particular scheduler may become unsuable (underlying HW) after
some event (e.g. GPU reset). If it's later chosen by
the get free sched. policy a command will fail to be
submitted.

Fix:
Add a driver specific callback to report the sched status so
rq with bad sched can be avoided in favor of working one or
none in which case job init will fail.

v2: Switch from driver callback to flag in scheduler.

v3: rebase

v4: Remove ready paramter from drm_sched_init, set
uncoditionally to true once init done.

v5: fix missed change in v3d in v4 (Alex)

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andrey Grodzovsky
2018-10-18 12:32:46 -04:00
committed by Alex Deucher
parent 2bb42410b1
commit faf6e1a87e
3 changed files with 17 additions and 1 deletions
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6
drivers/gpu/drm/scheduler/sched_main.c
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@@ -420,6 +420,9 @@ int drm_sched_job_init(struct drm_sched_job *job,
struct drm_gpu_scheduler *sched;
drm_sched_entity_select_rq(entity);
if (!entity->rq)
return -ENOENT;
sched = entity->rq->sched;
job->sched = sched;
@@ -633,6 +636,7 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
return PTR_ERR(sched->thread);
}
sched->ready = true;
return 0;
}
EXPORT_SYMBOL(drm_sched_init);
@@ -648,5 +652,7 @@ void drm_sched_fini(struct drm_gpu_scheduler *sched)
{
if (sched->thread)
kthread_stop(sched->thread);
sched->ready = false;
}
EXPORT_SYMBOL(drm_sched_fini);