diff options
| -rw-r--r-- | include/drm/gpu_scheduler.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h index d18af49fd009..aa90ed1f1b2b 100644 --- a/include/drm/gpu_scheduler.h +++ b/include/drm/gpu_scheduler.h @@ -239,6 +239,20 @@ struct drm_sched_backend_ops { * @timedout_job: Called when a job has taken too long to execute, * to trigger GPU recovery. * + * This method is called in a workqueue context. + * + * Drivers typically issue a reset to recover from GPU hangs, and this + * procedure usually follows the following workflow: + * + * 1. Stop the scheduler using drm_sched_stop(). This will park the + * scheduler thread and cancel the timeout work, guaranteeing that + * nothing is queued while we reset the hardware queue + * 2. Try to gracefully stop non-faulty jobs (optional) + * 3. Issue a GPU reset (driver-specific) + * 4. Re-submit jobs using drm_sched_resubmit_jobs() + * 5. Restart the scheduler using drm_sched_start(). At that point, new + * jobs can be queued, and the scheduler thread is unblocked + * * Return DRM_GPU_SCHED_STAT_NOMINAL, when all is normal, * and the underlying driver has started or completed recovery. * |