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/*

 * 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

#ifdef __KERNEL__

#ifndef TRUE

#define TRUE 1

#endif

#ifndef FALSE

#define FALSE 0

#endif

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;

        int 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;

        u8 is_bound;

        u8 is_flushed;

        u8 vmalloc_flag;

};

#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 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 *);

#endif                          /* __KERNEL__ */

#endif                          /* _AGP_BACKEND_H */