Since the request is already on the HW as we perform its validation, it and even its subsequent barrier may be concurrently retired before we process the assertions. If it is retired already and so off the HW, our assertions become void and we need to ignore them.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=112363 Signed-off-by: Chris Wilson <[email protected]> --- drivers/gpu/drm/i915/gt/intel_lrc.c | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index b65bc06855b0..b39713284570 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -1291,38 +1291,52 @@ assert_pending_valid(const struct intel_engine_execlists *execlists, } for (port = execlists->pending; (rq = *port); port++) { + unsigned long flags; + bool ok = true; + if (ce == rq->hw_context) { GEM_TRACE_ERR("Dup context:%llx in pending[%zd]\n", ce->timeline->fence_context, port - execlists->pending); return false; } - ce = rq->hw_context; + + /* Hold tightly onto the lock to prevent concurrent retires! */ + spin_lock_irqsave(&rq->lock, flags); + if (i915_request_completed(rq)) - continue; + goto unlock; if (i915_active_is_idle(&ce->active) && !i915_gem_context_is_kernel(ce->gem_context)) { GEM_TRACE_ERR("Inactive context:%llx in pending[%zd]\n", ce->timeline->fence_context, port - execlists->pending); - return false; + ok = false; + goto unlock; } if (!i915_vma_is_pinned(ce->state)) { GEM_TRACE_ERR("Unpinned context:%llx in pending[%zd]\n", ce->timeline->fence_context, port - execlists->pending); - return false; + ok = false; + goto unlock; } if (!i915_vma_is_pinned(ce->ring->vma)) { GEM_TRACE_ERR("Unpinned ring:%llx in pending[%zd]\n", ce->timeline->fence_context, port - execlists->pending); - return false; + ok = false; + goto unlock; } + +unlock: + spin_unlock_irqrestore(&rq->lock, flags); + if (!ok) + return false; } return ce; -- 2.24.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
