agp/intel: Restrict GTT mapping to valid range on i915 and i945

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References:

  Bug 15733 - Crash when accessing nonexistent GTT entries in i915
  https://bugzilla.kernel.org/show_bug.cgi?id=15733

On G33 and above, the size of the GTT space is determined by the GMCH
control register. Prior to this revision, the size is determined by the
size of the aperture. So we must careful to map and fill the appropriate
range depending on chipset.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>

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Chris Wilson 2010-05-18 12:24:51 +01:00 • committed by Eric Anholt

parent 9a7e8492d1

commit f1befe71fa

1 changed files with 39 additions and 7 deletions

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46

drivers/char/agp/intel-gtt.c

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