On 10/11/2023 2:02 AM, Jonathan Cavitt wrote:
It is not an error for GuC TLB invalidations to fail when the GT is
wedged or disabled, so do not process a wait failure as one in
guc_send_invalidate_tlb.
Signed-off-by: Fei Yang <fei.yang@xxxxxxxxx>
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@xxxxxxxxx>
CC: John Harrison <john.c.harrison@xxxxxxxxx>
Reviewed-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx>
Acked-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
---
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
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 9d5f8cccaa592..1914cba5f48dd 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -32,6 +32,7 @@
#include "i915_drv.h"
#include "i915_reg.h"
+#include "i915_irq.h"
#include "i915_trace.h"
/**
@@ -1941,6 +1942,12 @@ void intel_guc_submission_cancel_requests(struct intel_guc *guc)
/* GuC is blown away, drop all references to contexts */
xa_destroy(&guc->context_lookup);
+
+ /*
+ * Wedged GT won't respond to any TLB invalidation request. Simply
+ * release all the blocked waiters.
+ */
+ wake_up_all_tlb_invalidate(guc);
}
void intel_guc_submission_reset_finish(struct intel_guc *guc)
@@ -4740,6 +4747,14 @@ static long must_wait_woken(struct wait_queue_entry *wq_entry, long timeout)
return timeout;
}
+static bool intel_gt_is_enabled(const struct intel_gt *gt)
+{
+ /* Check if GT is wedged or suspended */
+ if (intel_gt_is_wedged(gt) || !intel_irqs_enabled(gt->i915))
+ return false;
+ return true;
+}
+
static int guc_send_invalidate_tlb(struct intel_guc *guc,
enum intel_guc_tlb_invalidation_type type)
{
@@ -4789,7 +4804,8 @@ static int guc_send_invalidate_tlb(struct intel_guc *guc,
if (err)
goto out;
- if (!must_wait_woken(&wait, intel_guc_ct_max_queue_time_jiffies())) {
+ if (intel_gt_is_enabled(guc_to_gt(guc)) &&
+ !must_wait_woken(&wait, intel_guc_ct_max_queue_time_jiffies())) {
guc_err(guc,
"TLB invalidation response timed out for seqno %u\n", seqno);
err = -ETIME;
