drm/i915: Avoid clearing preallocated regions from the GTT
As yet we do not do any preallocation (chicken-and-egg problem), but we
may like to preserve anything already allocated by the BIOS or grub and
reuse for own purposes after initialising the driver.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 21360a7..f16101f 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -935,6 +935,8 @@
I915_CACHE_LLC_MLC, /* gen6+, in docs at least! */
};
+#define I915_GTT_RESERVED ((struct drm_mm_node *)0x1)
+
struct drm_i915_gem_object_ops {
/* Interface between the GEM object and its backing storage.
* get_pages() is called once prior to the use of the associated set