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 <[email protected]> Signed-off-by: Jonathan Cavitt <[email protected]> CC: John Harrison <[email protected]> Reviewed-by: Andi Shyti <[email protected]> Acked-by: Tvrtko Ursulin <[email protected]> Acked-by: Nirmoy Das <[email protected]> --- .../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
