src/gallium/drivers/nouveau/nouveau_screen.h

#ifndef __NOUVEAU_SCREEN_H__
#define __NOUVEAU_SCREEN_H__

struct nouveau_screen {
	struct pipe_screen base;
	struct nouveau_device *device;
	struct nouveau_channel *channel;

	int (*pre_pipebuffer_map_callback) (struct pipe_screen *pscreen,
		struct pipe_buffer *pb, unsigned usage);
};

static inline struct nouveau_screen *
nouveau_screen(struct pipe_screen *pscreen)
{
	return (struct nouveau_screen *)pscreen;
}

static inline struct nouveau_bo *
nouveau_bo(struct pipe_buffer *pb)
{
	return pb ? *(struct nouveau_bo **)(pb + 1) : NULL;
}

int nouveau_screen_init(struct nouveau_screen *, struct nouveau_device *);
void nouveau_screen_fini(struct nouveau_screen *);

struct nouveau_miptree {
	struct pipe_texture base;
	struct nouveau_bo *bo;
};

static inline struct nouveau_miptree *
nouveau_miptree(struct pipe_texture *pt)
{
	return (struct nouveau_miptree *)pt;
}

#endif