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: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Acked-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
---
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 32 ++++++++++++++++++-
1 file changed, 31 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 1b04b1692e48d..d37698bd6b91a 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"
/**
@@ -1935,6 +1936,12 @@ 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)
@@ -4749,10 +4756,19 @@ 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)
{
struct intel_guc_tlb_wait _wq, *wq = &_wq;
+ struct intel_gt *gt = guc_to_gt(guc);
DEFINE_WAIT_FUNC(wait, woken_wake_function);
int err;
u32 seqno;
@@ -4766,6 +4782,13 @@ static int guc_send_invalidate_tlb(struct intel_guc *guc,
};
u32 size = ARRAY_SIZE(action);
+ /*
+ * Early guard against GT enablement. TLB invalidation should not be
+ * attempted if the GT is disabled due to suspend/wedge.
+ */
+ if (!intel_gt_is_enabled(gt))
+ return -EINVAL;
+
init_waitqueue_head(&_wq.wq);
if (xa_alloc_cyclic_irq(&guc->tlb_lookup, &seqno, wq,
@@ -4798,7 +4821,14 @@ 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())) {
+ /*
+ * Late guard against GT enablement. It is not an error for the TLB
+ * invalidation to time out if the GT is disabled during the process
+ * due to suspend/wedge. In fact, the TLB invalidation is cancelled
+ * in this case.
+ */
+ if (!must_wait_woken(&wait, intel_guc_ct_max_queue_time_jiffies()) &&
+ intel_gt_is_enabled(gt)) {
guc_err(guc,
"TLB invalidation response timed out for seqno %u\n", seqno);
err = -ETIME;
--
2.25.1
