[PATCH] drm/xe: Convert kernel job timeout from assert to warning

[Matt Roper]

xe_assert() is intended to be used only for "impossible" situations that
should never be hit (and if they are hit it means there's a driver bug
somewhere); assertions are only compiled into debug builds.

Although we expect jobs submitted by the kernel to be well-behaved and
run without error, timeouts are a legitimate possibility for reasons
beyond our control (bad firmware, flaky hardware, etc.).  We should use
a real WARN if we encounter these, even for non-debug builds, to ensure
the issue is being properly highlighted in bug reports and such.

Also give the WARN a more human-readable message and move it below the
general notice-level message that gets printed for any kind of timeout
to make the errors a bit more understandable.

Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/xe/xe_guc_submit.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index 2b008ec1b6de..4efc9601e050 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -23,6 +23,7 @@
 #include "xe_force_wake.h"
 #include "xe_gpu_scheduler.h"
 #include "xe_gt.h"
+#include "xe_gt_printk.h"
 #include "xe_guc.h"
 #include "xe_guc_ct.h"
 #include "xe_guc_exec_queue_types.h"
@@ -928,11 +929,12 @@ guc_exec_queue_timedout_job(struct drm_sched_job *drm_job)
 	int i = 0;
 
 	if (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &job->fence->flags)) {
-		xe_assert(xe, !(q->flags & EXEC_QUEUE_FLAG_KERNEL));
 		xe_assert(xe, !(q->flags & EXEC_QUEUE_FLAG_VM && !exec_queue_killed(q)));
 
 		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");
 		simple_error_capture(q);
 		xe_devcoredump(job);
 	} else {
-- 
2.43.0