[Intel-gfx] [PATCH 1/2] drm: Add colouring to the range allocator

[Daniel Vetter]

On Tue, Jul 10, 2012 at 11:15:23AM +0100, Chris Wilson wrote:
> In order to support snoopable memory on non-LLC architectures (so that
> we can bind vgem objects into the i915 GATT for example), we have to
> avoid the prefetcher on the GPU from crossing memory domains and so
> prevent allocation of a snoopable PTE immediately following an uncached
> PTE. To do that, we need to extend the range allocator with support for
> tracking and segregating different node colours.
> 
> This will be used by i915 to segregate memory domains within the GTT.
> 
> v2: Now with more drm_mm helpers and less driver interference.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Dave Airlie <airlied at redhat.com
> Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
> Cc: Ben Skeggs <bskeggs at redhat.com>
> Cc: Jerome Glisse <jglisse at redhat.com>
> Cc: Alex Deucher <alexander.deucher at amd.com>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: dri-devel at lists.freedesktop.org

Imo we should ditch the rather useless best_match and maybe also fold the
_range variants into the generic ones for most cases, but that's stuff for
other patches. So

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Cheers, Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48