From 7ec73b7e36d0bf165cea77770a490fcdf4418e93 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 5 Jan 2017 17:00:59 +0000 Subject: [PATCH] drm/i915: Only skip requests once a context is banned If we skip before banning, we have an inconsistent interface between execbuf still queueing valid request but those requests already queued being cancelled. If we only cancel the pending requests once we stop accepting new requests, the user interface is more consistent. Reported-by: Tvrtko Ursulin Fixes: 821ed7df6e2a ("drm/i915: Update reset path to fix incomplete requests") Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Cc: Mika Kuoppala Cc: # v4.9+ Reviewed-by: Tvrtko Ursulin Link: http://patchwork.freedesktop.org/patch/msgid/20170105170059.344-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_gem.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 70ddff3570bb..e60467271898 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2734,7 +2734,7 @@ void i915_gem_reset_prepare(struct drm_i915_private *dev_priv) static void i915_gem_reset_engine(struct intel_engine_cs *engine) { struct drm_i915_gem_request *request; - struct i915_gem_context *incomplete_ctx; + struct i915_gem_context *hung_ctx; struct intel_timeline *timeline; unsigned long flags; bool ring_hung; @@ -2746,6 +2746,8 @@ static void i915_gem_reset_engine(struct intel_engine_cs *engine) if (!request) return; + hung_ctx = request->ctx; + ring_hung = engine->hangcheck.stalled; if (engine->hangcheck.seqno != intel_engine_get_seqno(engine)) { DRM_DEBUG_DRIVER("%s pardoned, was guilty? %s\n", @@ -2755,9 +2757,9 @@ static void i915_gem_reset_engine(struct intel_engine_cs *engine) } if (ring_hung) - i915_gem_context_mark_guilty(request->ctx); + i915_gem_context_mark_guilty(hung_ctx); else - i915_gem_context_mark_innocent(request->ctx); + i915_gem_context_mark_innocent(hung_ctx); if (!ring_hung) return; @@ -2768,6 +2770,10 @@ static void i915_gem_reset_engine(struct intel_engine_cs *engine) /* Setup the CS to resume from the breadcrumb of the hung request */ engine->reset_hw(engine, request); + /* If this context is now banned, skip all of its pending requests. */ + if (!i915_gem_context_is_banned(hung_ctx)) + return; + /* Users of the default context do not rely on logical state * preserved between batches. They have to emit full state on * every batch and so it is safe to execute queued requests following @@ -2776,17 +2782,16 @@ static void i915_gem_reset_engine(struct intel_engine_cs *engine) * Other contexts preserve state, now corrupt. We want to skip all * queued requests that reference the corrupt context. */ - incomplete_ctx = request->ctx; - if (i915_gem_context_is_default(incomplete_ctx)) + if (i915_gem_context_is_default(hung_ctx)) return; - timeline = i915_gem_context_lookup_timeline(incomplete_ctx, engine); + timeline = i915_gem_context_lookup_timeline(hung_ctx, engine); spin_lock_irqsave(&engine->timeline->lock, flags); spin_lock(&timeline->lock); list_for_each_entry_continue(request, &engine->timeline->requests, link) - if (request->ctx == incomplete_ctx) + if (request->ctx == hung_ctx) reset_request(request); list_for_each_entry(request, &timeline->requests, link) -- GitLab