drm/xe/guc: Handle timing out of signaled jobs gracefully

Timing out of signaled jobs can happen during regular operations (e.g.
an exec queue closed immediately after last fence signaled). The TDR can
pass the worker which free jobs. Rather than running through the TDR if
signaled job is found, simply free it without any debug messages.

Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reported-by: José Roberto de Souza <jose.souza@intel.com>
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1271Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Tested-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240223204659.40750-1-matthew.brost@intel.com

drivers/gpu/drm/xe/xe_guc_submit.c

@@ -929,20 +929,26 @@ guc_exec_queue_timedout_job(struct drm_sched_job *drm_job)
 	int err = -ETIME;
 	int i = 0;
 
-	if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &job->fence->flags)) {
-		drm_notice(&xe->drm, "Timedout job: seqno=%u, guc_id=%d, flags=0x%lx",
-			   xe_sched_job_seqno(job), q->guc->id, q->flags);
-		xe_gt_WARN(q->gt, q->flags & EXEC_QUEUE_FLAG_KERNEL,
-			   "Kernel-submitted job timed out\n");
-		xe_gt_WARN(q->gt, q->flags & EXEC_QUEUE_FLAG_VM && !exec_queue_killed(q),
-			   "VM job timed out on non-killed execqueue\n");
-
-		simple_error_capture(q);
-		xe_devcoredump(job);
-	} else {
-		drm_dbg(&xe->drm, "Timedout signaled job: seqno=%u, guc_id=%d, flags=0x%lx",
-			 xe_sched_job_seqno(job), q->guc->id, q->flags);
+	/*
+	 * TDR has fired before free job worker. Common if exec queue
+	 * immediately closed after last fence signaled.
+	 */
+	if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &job->fence->flags)) {
+		guc_exec_queue_free_job(drm_job);
+
+		return DRM_GPU_SCHED_STAT_NOMINAL;
 	}
+
+	drm_notice(&xe->drm, "Timedout job: seqno=%u, guc_id=%d, flags=0x%lx",
+		   xe_sched_job_seqno(job), q->guc->id, q->flags);
+	xe_gt_WARN(q->gt, q->flags & EXEC_QUEUE_FLAG_KERNEL,
+		   "Kernel-submitted job timed out\n");
+	xe_gt_WARN(q->gt, q->flags & EXEC_QUEUE_FLAG_VM && !exec_queue_killed(q),
+		   "VM job timed out on non-killed execqueue\n");
+
+	simple_error_capture(q);
+	xe_devcoredump(job);
+
 	trace_xe_sched_job_timedout(job);
 
 	/* Kill the run_job entry point */