drm/i915: Compute physical addresses from base of stolen memory

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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>

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This commit is contained in:

Chris Wilson 2010-11-23 12:09:30 +00:00

parent 0b0b053a39

commit fe669bf88e

2 changed files with 77 additions and 122 deletions

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193

drivers/gpu/drm/i915/i915_dma.c

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2

drivers/gpu/drm/i915/i915_drv.h

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