From: Chris Wilson Date: Sat, 23 Oct 2010 09:15:06 +0000 (+0100) Subject: drm/i915: Invalidate the to-ring, flush the old-ring when updating domains X-Git-Tag: v2.6.37-rc1~92^2~11^2~1 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=b6651458d33c309767762a6c3da041573413fd88;p=linux.git drm/i915: Invalidate the to-ring, flush the old-ring when updating domains When the object has been written to by the gpu it remains on the ring until its flush has been retired. However, when the object is moving to the ring and the associated cache needs to be invalidated, we need to perform the flush on the target ring, not the one it came from (which is NULL in the reported case and so the flush was entirely absent). Reported-by: Peter Clifton Reported-and-tested-by: Alexey Fisher Signed-off-by: Chris Wilson --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 9290f02215cb..e7f27a5b89dc 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3078,7 +3078,8 @@ i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write) * drm_agp_chipset_flush */ static void -i915_gem_object_set_to_gpu_domain(struct drm_gem_object *obj) +i915_gem_object_set_to_gpu_domain(struct drm_gem_object *obj, + struct intel_ring_buffer *ring) { struct drm_device *dev = obj->dev; struct drm_i915_private *dev_priv = dev->dev_private; @@ -3132,8 +3133,10 @@ i915_gem_object_set_to_gpu_domain(struct drm_gem_object *obj) dev->invalidate_domains |= invalidate_domains; dev->flush_domains |= flush_domains; - if (obj_priv->ring) + if (flush_domains & I915_GEM_GPU_DOMAINS) dev_priv->mm.flush_rings |= obj_priv->ring->id; + if (invalidate_domains & I915_GEM_GPU_DOMAINS) + dev_priv->mm.flush_rings |= ring->id; trace_i915_gem_object_change_domain(obj, old_read_domains, @@ -3765,7 +3768,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data, struct drm_gem_object *obj = object_list[i]; /* Compute new gpu domains and update invalidate/flush */ - i915_gem_object_set_to_gpu_domain(obj); + i915_gem_object_set_to_gpu_domain(obj, ring); } if (dev->invalidate_domains | dev->flush_domains) {