1. 根目录:
2. include
3. drm
4. ati_pcigart.h

#ifndef DRM_ATI_PCIGART_H
#define DRM_ATI_PCIGART_H

#include <drm/drm_legacy.h>

/* location of GART table */
#define DRM_ATI_GART_MAIN 1
#define DRM_ATI_GART_FB   2

#define DRM_ATI_GART_PCI 1
#define DRM_ATI_GART_PCIE 2
#define DRM_ATI_GART_IGP 3

struct drm_ati_pcigart_info {
	int gart_table_location;
	int gart_reg_if;
	void *addr;
	dma_addr_t bus_addr;
	dma_addr_t table_mask;
	struct drm_dma_handle *table_handle;
	struct drm_local_map mapping;
	int table_size;
};

extern int drm_ati_pcigart_init(struct drm_device *dev,
				struct drm_ati_pcigart_info * gart_info);
extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
				   struct drm_ati_pcigart_info * gart_info);

#endif