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drm/i915: Set up an MTRR covering the GTT at driver load.

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We'd love to just be using PAT, but even on chips with PAT it gets disabled
sometimes due to an errata.  It would probably be better to have pat_enabled
exported and only bother with this when !pat_enabled.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Eric Anholt
2009-01-23 12:57:47 -08:00
committed by Dave Airlie
parent 725e30ad66
commit ab657db12d
3 changed files with 25 additions and 11 deletions
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drivers/gpu/drm/i915/i915_drv.h
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@@ -284,6 +284,7 @@ typedef struct drm_i915_private {
struct drm_mm gtt_space;
struct io_mapping *gtt_mapping;
int gtt_mtrr;
/**
* List of objects currently involved in rendering from the