drm/sched: add drm_sched_fault

Add a helper to immediately start timeout handling in case of a hardware
fault.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/scheduler/sched_main.c

@@ -196,6 +196,19 @@ static void drm_sched_start_timeout(struct drm_gpu_scheduler *sched)
 		schedule_delayed_work(&sched->work_tdr, sched->timeout);
 }
 
+/**
+ * drm_sched_fault - immediately start timeout handler
+ *
+ * @sched: scheduler where the timeout handling should be started.
+ *
+ * Start timeout handling immediately when the driver detects a hardware fault.
+ */
+void drm_sched_fault(struct drm_gpu_scheduler *sched)
+{
+	mod_delayed_work(system_wq, &sched->work_tdr, 0);
+}
+EXPORT_SYMBOL(drm_sched_fault);
+
 /* job_finish is called after hw fence signaled
  */
 static void drm_sched_job_finish(struct work_struct *work)

include/drm/gpu_scheduler.h

@@ -299,6 +299,7 @@ void drm_sched_hw_job_reset(struct drm_gpu_scheduler *sched,
 void drm_sched_job_recovery(struct drm_gpu_scheduler *sched);
 bool drm_sched_dependency_optimized(struct dma_fence* fence,
 				    struct drm_sched_entity *entity);
+void drm_sched_fault(struct drm_gpu_scheduler *sched);
 void drm_sched_job_kickout(struct drm_sched_job *s_job);
 
 void drm_sched_rq_add_entity(struct drm_sched_rq *rq,