[Intel-gfx] [PATCH 2/2] drm/i915: Don't access snooped pages through the GTT (even for error capture)

[Chris Wilson]

On Thu, Jan 30, 2014 at 02:38:16PM +0000, Chris Wilson wrote:
> We want to use the GTT for reading back objects upon an error so that we
> have exactly the information that the GPU saw. However, it is verboten
> to access snoopable pages through the GTT and causes my PineView GPU to
> throw a page fault instead.
> 
> This has not been a problem in the past as we only dumped ringbuffers
> and batchbuffers, both of which must be uncached. However, the

s/uncached/not snooped/ to avoid confusion on SNB and friends.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre