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drm/i915: Conditionally carve out GGTT PDE

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It only works that way on GEN6 and GEN7. Let's not assume GENn will be
the same.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2013-04-08 18:43:52 -07:00 committed by Daniel Vetter
parent 1e7d12d467
commit 3eb1c005c6
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -623,9 +623,12 @@ void i915_gem_init_global_gtt(struct drm_device *dev)
if (intel_enable_ppgtt(dev) && HAS_ALIASING_PPGTT(dev)) {
int ret;
/* PPGTT pdes are stolen from global gtt ptes, so shrink the
* aperture accordingly when using aliasing ppgtt. */
gtt_size -= I915_PPGTT_PD_ENTRIES*PAGE_SIZE;
if (INTEL_INFO(dev)->gen <= 7) {
/* PPGTT pdes are stolen from global gtt ptes, so shrink the
* aperture accordingly when using aliasing ppgtt. */
gtt_size -= I915_PPGTT_PD_ENTRIES*PAGE_SIZE;
}
i915_gem_setup_global_gtt(dev, 0, mappable_size, gtt_size);