[Intel-gfx] [PATCH v8 5/7] drm/i915: No TLB invalidation on wedged GT

[Jonathan Cavitt]

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 at intel.com>
Signed-off-by: Jonathan Cavitt <jonathan.cavitt at intel.com>
CC: John Harrison <john.c.harrison at intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 12 +++++++++++-
 1 file changed, 11 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 4ed6e9e759007..ddb3115715e41 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"
 
 /**
@@ -4759,6 +4760,14 @@ 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_inval_mode type)
 {
 	struct intel_guc_tlb_wait _wq, *wq = &_wq;
@@ -4810,7 +4819,8 @@ static int guc_send_invalidate_tlb(struct intel_guc *guc, enum intel_guc_tlb_inv
 	if (err)
 		goto out;
 
-	if (!must_wait_woken(&wait, intel_guc_ct_expected_delay(&guc->ct))) {
+	if (intel_gt_is_enabled(guc_to_gt(guc)) &&
+	    !must_wait_woken(&wait, intel_guc_ct_expected_delay(&guc->ct))) {
 		guc_err(guc,
 			"TLB invalidation response timed out for seqno %u\n", seqno);
 		err = -ETIME;
-- 
2.25.1