DRM_IOCTL_BASE    677 include/uapi/drm/drm.h #define DRM_IO(nr)			_IO(DRM_IOCTL_BASE,nr)
DRM_IOCTL_BASE    678 include/uapi/drm/drm.h #define DRM_IOR(nr,type)		_IOR(DRM_IOCTL_BASE,nr,type)
DRM_IOCTL_BASE    679 include/uapi/drm/drm.h #define DRM_IOW(nr,type)		_IOW(DRM_IOCTL_BASE,nr,type)
DRM_IOCTL_BASE    680 include/uapi/drm/drm.h #define DRM_IOWR(nr,type)		_IOWR(DRM_IOCTL_BASE,nr,type)