drm/xe: Resume TDR after GT reset

Not starting the TDR after GT reset on exec queue which have been
restarted can lead to jobs being able to be run forever. Fix this by
restarting the TDR.

Fixes: dd08ebf ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Matthew Brost <[email protected]>
Reviewed-by: Nirmoy Das <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 8ec5a4e)
Signed-off-by: Lucas De Marchi <[email protected]>

Author: mbrost05

drivers/gpu/drm/xe/xe_gpu_scheduler.c

@@ -90,6 +90,11 @@ void xe_sched_submission_stop(struct xe_gpu_scheduler *sched)
 	cancel_work_sync(&sched->work_process_msg);
 }
 
+void xe_sched_submission_resume_tdr(struct xe_gpu_scheduler *sched)
+{
+	drm_sched_resume_timeout(&sched->base, sched->base.timeout);
+}
+
 void xe_sched_add_msg(struct xe_gpu_scheduler *sched,
 		      struct xe_sched_msg *msg)
 {

drivers/gpu/drm/xe/xe_gpu_scheduler.h

@@ -22,6 +22,8 @@ void xe_sched_fini(struct xe_gpu_scheduler *sched);
 void xe_sched_submission_start(struct xe_gpu_scheduler *sched);
 void xe_sched_submission_stop(struct xe_gpu_scheduler *sched);
 
+void xe_sched_submission_resume_tdr(struct xe_gpu_scheduler *sched);
+
 void xe_sched_add_msg(struct xe_gpu_scheduler *sched,
 		      struct xe_sched_msg *msg);
 void xe_sched_add_msg_locked(struct xe_gpu_scheduler *sched,

drivers/gpu/drm/xe/xe_guc_submit.c

@@ -1826,6 +1826,7 @@ static void guc_exec_queue_start(struct xe_exec_queue *q)
 	}
 
 	xe_sched_submission_start(sched);
+	xe_sched_submission_resume_tdr(sched);
 }
 
 int xe_guc_submit_start(struct xe_guc *guc)