[PATCH v6 3/4] drm/xe/xe_guc_submit: Allow lr exec queues to be banned

[Jonathan Cavitt]

LR queues currently don't get banned during a GT/GuC reset because they
lack a job.  Though they don't have a job to detect the reset status of,
it's still possible to tell when they should be banned by looking at the
LRC: if the LRC head and tail don't match, then the exec queue should be
banned and cleaned up.

This also requires swapping the usage of xe_sched_tdr_queue_imm with
xe_guc_exec_queue_trigger_cleanup, as the former is specific to non-lr
exec queues.

Suggested-by: Matthew Brost <matthew.brost at intel.com>
Signed-off-by: Jonathan Cavitt <jonathan.cavitt at intel.com>
Reviewed-by: Matthew Brost <matthew.brost at intel.com>
Reviewed-by: Stuart Summers <stuart.summers at intel.com>
---

v2:
- Fix Subject line
- Modify change slightly to remove need for "ban" boolean

v3: Revert change involving "ban" boolean to version 1

v4: Add missing semicolon and remove whitespace

v5: Use new xe_lrc_ring_tail function

 drivers/gpu/drm/xe/xe_guc_submit.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c
index 09331dc41ebdb..89cf84a5f888d 100644
--- a/drivers/gpu/drm/xe/xe_guc_submit.c
+++ b/drivers/gpu/drm/xe/xe_guc_submit.c
@@ -1422,15 +1422,23 @@ static void guc_exec_queue_stop(struct xe_guc *guc, struct xe_exec_queue *q)
 	 */
 	if (!(q->flags & (EXEC_QUEUE_FLAG_KERNEL | EXEC_QUEUE_FLAG_VM))) {
 		struct xe_sched_job *job = xe_sched_first_pending_job(sched);
+		bool ban = false;
 
 		if (job) {
 			if ((xe_sched_job_started(job) &&
 			    !xe_sched_job_completed(job)) ||
 			    xe_sched_invalidate_job(job, 2)) {
 				trace_xe_sched_job_ban(job);
-				set_exec_queue_banned(q);
-				xe_sched_tdr_queue_imm(&q->guc->sched);
+				ban = true;
 			}
+		} else if (xe_exec_queue_is_lr(q) &&
+			   (xe_lrc_ring_head(q->lrc) != xe_lrc_ring_tail(q->lrc))) {
+			ban = true;
+		}
+
+		if (ban) {
+			set_exec_queue_banned(q);
+			xe_guc_exec_queue_trigger_cleanup(q);
 		}
 	}
 }
-- 
2.25.1