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drm/i915: Report the actual swizzling back to userspace

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Userspace cares about whether or not swizzling depends on the page
address for its direct access into bound objects. Extend the get_tiling
ioctl to report the physical swizzling value in addition to the logical
swizzling value so that userspace can accurately determine when it is
possible for manual detiling.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Akash Goel <akash.goel@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Testcase: igt/gem_tiled_wc
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson
2014-10-24 12:11:11 +01:00
committed by Daniel Vetter
parent c826c44938
commit 70f2f5c704
2 changed files with 7 additions and 0 deletions
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6
include/uapi/drm/i915_drm.h
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@@ -876,6 +876,12 @@ struct drm_i915_gem_get_tiling {
* mmap mapping.
*/
__u32 swizzle_mode;
/**
* Returned address bit 6 swizzling required for CPU access through
* mmap mapping whilst bound.
*/
__u32 phys_swizzle_mode;
};
struct drm_i915_gem_get_aperture {