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#ifndef _GAMMA_DRM_H_

#define _GAMMA_DRM_H_

typedef struct _drm_gamma_tex_region {

        unsigned char next, prev; /* indices to form a circular LRU  */

        unsigned char in_use;   /* owned by a client, or free? */

        int age;                /* tracked by clients to update local LRU's */

} drm_gamma_tex_region_t;

typedef struct {

        unsigned int    GDeltaMode;

        unsigned int    GDepthMode;

        unsigned int    GGeometryMode;

        unsigned int    GTransformMode;

} drm_gamma_context_regs_t;

typedef struct _drm_gamma_sarea {

        drm_gamma_context_regs_t context_state;

        unsigned int dirty;

        /* Maintain an LRU of contiguous regions of texture space.  If

         * you think you own a region of texture memory, and it has an

         * age different to the one you set, then you are mistaken and

         * it has been stolen by another client.  If global texAge

         * hasn't changed, there is no need to walk the list.

         *

         * These regions can be used as a proxy for the fine-grained

         * texture information of other clients - by maintaining them

         * in the same lru which is used to age their own textures,

         * clients have an approximate lru for the whole of global

         * texture space, and can make informed decisions as to which

         * areas to kick out.  There is no need to choose whether to

         * kick out your own texture or someone else's - simply eject

         * them all in LRU order.

         */

#define GAMMA_NR_TEX_REGIONS 64

        drm_gamma_tex_region_t texList[GAMMA_NR_TEX_REGIONS+1];

                                /* Last elt is sentinal */

        int texAge;             /* last time texture was uploaded */

        int last_enqueue;       /* last time a buffer was enqueued */

        int last_dispatch;      /* age of the most recently dispatched buffer */

        int last_quiescent;     /*  */

        int ctxOwner;           /* last context to upload state */

        int vertex_prim;

} drm_gamma_sarea_t;

/* WARNING: If you change any of these defines, make sure to wear a bullet

 * proof vest because these are part of the stable kernel<->userspace ABI

 */

/* Gamma specific ioctls

 * The device specific ioctl range is 0x40 to 0x79.

 */

#define DRM_IOCTL_GAMMA_INIT            DRM_IOW( 0x40, drm_gamma_init_t)

#define DRM_IOCTL_GAMMA_COPY            DRM_IOW( 0x41, drm_gamma_copy_t)

typedef struct drm_gamma_copy {

        unsigned int    DMAOutputAddress;

        unsigned int    DMAOutputCount;

        unsigned int    DMAReadGLINTSource;

        unsigned int    DMARectangleWriteAddress;

        unsigned int    DMARectangleWriteLinePitch;

        unsigned int    DMARectangleWrite;

        unsigned int    DMARectangleReadAddress;

        unsigned int    DMARectangleReadLinePitch;

        unsigned int    DMARectangleRead;

        unsigned int    DMARectangleReadTarget;

} drm_gamma_copy_t;

typedef struct drm_gamma_init {

        enum {

                GAMMA_INIT_DMA    = 0x01,

                GAMMA_CLEANUP_DMA = 0x02

        } func;

        int sarea_priv_offset;

        int pcimode;

        unsigned int mmio0;

        unsigned int mmio1;

        unsigned int mmio2;

        unsigned int mmio3;

        unsigned int buffers_offset;

} drm_gamma_init_t;

#endif /* _GAMMA_DRM_H_ */