tree dbfb577c81b1a7d2e8b4ffb74d319cc66406c014
parent 058d88c4330f963033a5d11b269c8f86677494d1
author Chris Wilson <chris@chris-wilson.co.uk> 1471254547 +0100
committer Chris Wilson <chris@chris-wilson.co.uk> 1471255274 +0100

drm/i915: Introduce i915_ggtt_offset()

This little helper only exists to safely discard the upper unused 32bits
of the general 64-bit VMA address - as we know that all Global GTT
currently are less than 4GiB in size and so that the upper bits must be
zero. In many places, we use a u32 for the global GTT offset and we want
to document where we are discarding the full VMA offset.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1471254551-25805-28-git-send-email-chris@chris-wilson.co.uk