drm: add DRM_NOUVEAU_GEM_MAP/UNMAP
Add struct drm_nouveau_gem_map and struct drm_nouveau_gem_unmap, and the corresponding ioctl opcodes DRM_NOUVEAU_GEM_MAP and DRM_NOUVEAU_GEM_UNMAP, for supporting partial buffer mapping. Change-Id: I696fe2ea6740c221c10caa27e6e7852447097720 Signed-off-by:Andrew Chew <achew@nvidia.com> Signed-off-by:
Sean Paul <seanpaul@chromium.org>
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