drm/i915: Only preallocate the aliasing GTT to the extents of the global GTT
authorChris Wilson <chris@chris-wilson.co.uk>
Wed, 15 Feb 2017 08:43:55 +0000 (08:43 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Wed, 15 Feb 2017 10:07:33 +0000 (10:07 +0000)
commite565ceb086d70e577e41315b921014dcfb991a6b
tree751efa8ca6d364ec053d73012991fe53c7182647
parent381b943b07027f54083ed685368e261c1089ce53
drm/i915: Only preallocate the aliasing GTT to the extents of the global GTT

As the aliasing GTT is only accessed via the global GTT, we will never
use more of it than we expose via the Global GTT and so we only need to
preallocate sufficient space within the ppgtt for the full GTT. Equally,
if the aliasing GTT is smaller than the global GTT, we have a serious
issue and must bail.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170215084357.19977-21-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/i915_gem_gtt.c