agp_backend.h
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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
#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;
const 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;
struct page **pages;
size_t page_count;
int key;
int num_scratch_pages;
off_t pg_start;
u32 type;
u32 physical;
bool is_bound;
bool is_flushed;
/* list of agp_memory mapped to the aperture */
struct list_head mapped_list;
/* DMA-mapped addresses */
struct scatterlist *sg_list;
int num_sg;
};
#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 /* _AGP_BACKEND_H */