tree 12372e0f40a428cef1e86f02886b978d37fc30af
parent d1dd20a96524ac462ed4f28dae168b9637f079e5
author Chris Wilson <chris@chris-wilson.co.uk> 1332749427 +0200
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1332846977 +0200

drm/i915: Avoid using mappable space for relocation processing through the CPU

We try to avoid writing the relocations through the uncached GTT, if the
buffer is currently in the CPU write domain and so will be flushed out to
main memory afterwards anyway. Also on SandyBridge we can safely write
to the pages in cacheable memory, so long as the buffer is LLC mapped.
In either of these cases, we therefore do not need to force the
reallocation of the buffer into the mappable region of the GTT, reducing
the aperture pressure.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>