Now that the error capture is fully decoupled from fence signalling
(request retirement to free memory, which in turn depends on resets) we
can safely flush the G2H handler during a GT reset. This is eliminates
corner cases where GuC generated G2H (e.g. engine resets) race with a GT
reset.
v2:
(John Harrison)
- Fix typo in commit message (s/is/in)
Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
Reviewed-by: John Harrison <John.C.Harrison@xxxxxxxxx>
---
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 18 +-----------------
1 file changed, 1 insertion(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index 514b3060b141..406dd2e3f5a9 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1396,8 +1396,6 @@ static void guc_flush_destroyed_contexts(struct intel_guc *guc);
void intel_guc_submission_reset_prepare(struct intel_guc *guc)
{
- int i;
-
if (unlikely(!guc_submission_initialized(guc))) {
/* Reset called during driver load? GuC not yet initialised! */
return;
@@ -1414,21 +1412,7 @@ void intel_guc_submission_reset_prepare(struct intel_guc *guc)
guc_flush_submissions(guc);
guc_flush_destroyed_contexts(guc);
-
- /*
- * Handle any outstanding G2Hs before reset. Call IRQ handler directly
- * each pass as interrupt have been disabled. We always scrub for
- * outstanding G2H as it is possible for outstanding_submission_g2h to
- * be incremented after the context state update.
- */
- for (i = 0; i < 4 && atomic_read(&guc->outstanding_submission_g2h); ++i) {
- intel_guc_to_host_event_handler(guc);
-#define wait_for_reset(guc, wait_var) \
- intel_guc_wait_for_pending_msg(guc, wait_var, false, (HZ / 20))
- do {
- wait_for_reset(guc, &guc->outstanding_submission_g2h);
- } while (!list_empty(&guc->ct.requests.incoming));
- }
+ flush_work(&guc->ct.requests.worker);
scrub_guc_desc_for_outstanding_g2h(guc);
}
--
2.34.1
