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Commit b196fbc7 authored by Chris Wilson's avatar Chris Wilson
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drm/i915: Manipulate the Global GTT size using I915_GTT_PAGE_SIZE 



I incorrectly converted the exclusion of the last 4096 bytes (that avoids
any potential prefetching past the end of the GTT) to PAGE_SIZE and not
to I915_GTT_PAGE_SIZE as it should be.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170206084547.27921-1-chris@chris-wilson.co.uk


Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
parent 22cc440e

drivers/gpu/drm/i915/i915_gem_gtt.c

+2 −2
Original line number Diff line number Diff line
@@ -3243,9 +3243,9 @@ int i915_ggtt_init_hw(struct drm_i915_private *dev_priv) 
	 * shrink the range used by drm_mm.

	 */

	mutex_lock(&dev_priv->drm.struct_mutex);

	ggtt->base.total -= PAGE_SIZE;

	ggtt->base.total -= I915_GTT_PAGE_SIZE;

	i915_address_space_init(&ggtt->base, dev_priv, "[global]");

	ggtt->base.total += PAGE_SIZE;

	ggtt->base.total += I915_GTT_PAGE_SIZE;

	if (!HAS_LLC(dev_priv))

		ggtt->base.mm.color_adjust = i915_gtt_color_adjust;

	mutex_unlock(&dev_priv->drm.struct_mutex);