drm/i915: Compute physical addresses from base of stolen memory
authorChris Wilson <chris@chris-wilson.co.uk>
Tue, 23 Nov 2010 12:09:30 +0000 (12:09 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 23 Nov 2010 15:42:56 +0000 (15:42 +0000)
commitfe669bf88e9108b96a847385df08c9b1e98c1420
treebd8c391717f031ea9d763fe669beb9eaf929ca75
parent0b0b053a3949f5c467c3b3ba135d4c161f9fbd00
drm/i915: Compute physical addresses from base of stolen memory

The GATT is a write-only set of registers, reading from them in the
manner of i915_gtt_to_phys() is supposed to be undefined. However a
simple solution exists as we allocate linear memory from the stolen
area, we can simply add the block offset to the base register. As a
side-effect we recover all the unused stolen GTT entries and so enlarge
our aperture.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
drivers/gpu/drm/i915/i915_dma.c
drivers/gpu/drm/i915/i915_drv.h