/*

 * AGPGART backend specific includes. Not for userspace consumption.

 *

 * Copyright (C) 2004 Silicon Graphics, Inc.

 * Copyright (C) 2002-2003 Dave Jones

 * Copyright (C) 1999 Jeff Hartmann

 * Copyright (C) 1999 Precision Insight, Inc.

 * Copyright (C) 1999 Xi Graphics, Inc.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, 

 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 

 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 

 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 */

#ifndef _AGP_BACKEND_H

#define _AGP_BACKEND_H 1

#include <linux/list.h>

enum chipset_type {

	NOT_SUPPORTED,

	SUPPORTED,

};

struct agp_version {

	u16 major;

	u16 minor;

};

struct agp_kern_info {

	struct agp_version version;

	struct pci_dev *device;

	enum chipset_type chipset;

	unsigned long mode;

	unsigned long aper_base;

	size_t aper_size;

	int max_memory;		/* In pages */

	int current_memory;

	bool cant_use_aperture;

	unsigned long page_mask;

	struct vm_operations_struct *vm_ops;

};

/*

 * The agp_memory structure has information about the block of agp memory

 * allocated.  A caller may manipulate the next and prev pointers to link

 * each allocated item into a list.  These pointers are ignored by the backend.

 * Everything else should never be written to, but the caller may read any of

 * the items to determine the status of this block of agp memory.

 */

struct agp_bridge_data;

struct agp_memory {

	struct agp_memory *next;

	struct agp_memory *prev;

	struct agp_bridge_data *bridge;

	unsigned long *memory;

	size_t page_count;

	int key;

	int num_scratch_pages;

	off_t pg_start;

	u32 type;

	u32 physical;

	bool is_bound;

	bool is_flushed;

        bool vmalloc_flag;

	/* list of agp_memory mapped to the aperture */

	struct list_head mapped_list;

};

#define AGP_NORMAL_MEMORY 0

#define AGP_USER_TYPES (1 << 16)

#define AGP_USER_MEMORY (AGP_USER_TYPES)

#define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1)

extern struct agp_bridge_data *agp_bridge;

extern struct list_head agp_bridges;

extern struct agp_bridge_data *(*agp_find_bridge)(struct pci_dev *);

extern void agp_free_memory(struct agp_memory *);

extern struct agp_memory *agp_allocate_memory(struct agp_bridge_data *, size_t, u32);

extern int agp_copy_info(struct agp_bridge_data *, struct agp_kern_info *);

extern int agp_bind_memory(struct agp_memory *, off_t);

extern int agp_unbind_memory(struct agp_memory *);

extern int agp_rebind_memory(void);

extern void agp_enable(struct agp_bridge_data *, u32);

extern struct agp_bridge_data *agp_backend_acquire(struct pci_dev *);

extern void agp_backend_release(struct agp_bridge_data *);

extern void agp_flush_chipset(struct agp_bridge_data *);

#endif				/* _AGP_BACKEND_H */