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1/*2 * AGPGART backend specific includes. Not for userspace consumption.3 *4 * Copyright (C) 2004 Silicon Graphics, Inc.5 * Copyright (C) 2002-2003 Dave Jones6 * Copyright (C) 1999 Jeff Hartmann7 * Copyright (C) 1999 Precision Insight, Inc.8 * Copyright (C) 1999 Xi Graphics, Inc.9 *10 * Permission is hereby granted, free of charge, to any person obtaining a11 * copy of this software and associated documentation files (the "Software"),12 * to deal in the Software without restriction, including without limitation13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,14 * and/or sell copies of the Software, and to permit persons to whom the15 * Software is furnished to do so, subject to the following conditions:16 *17 * The above copyright notice and this permission notice shall be included18 * in all copies or substantial portions of the Software.19 *20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL23 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, 24 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 25 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 26 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.27 *28 */29 30#ifndef _AGP_BACKEND_H31#define _AGP_BACKEND_H 132 33#include <linux/list.h>34 35enum chipset_type {36 NOT_SUPPORTED,37 SUPPORTED,38};39 40struct agp_version {41 u16 major;42 u16 minor;43};44 45struct agp_kern_info {46 struct agp_version version;47 struct pci_dev *device;48 enum chipset_type chipset;49 unsigned long mode;50 unsigned long aper_base;51 size_t aper_size;52 int max_memory; /* In pages */53 int current_memory;54 bool cant_use_aperture;55 unsigned long page_mask;56 const struct vm_operations_struct *vm_ops;57};58 59/*60 * The agp_memory structure has information about the block of agp memory61 * allocated. A caller may manipulate the next and prev pointers to link62 * each allocated item into a list. These pointers are ignored by the backend.63 * Everything else should never be written to, but the caller may read any of64 * the items to determine the status of this block of agp memory.65 */66 67struct agp_bridge_data;68 69struct agp_memory {70 struct agp_memory *next;71 struct agp_memory *prev;72 struct agp_bridge_data *bridge;73 struct page **pages;74 size_t page_count;75 int key;76 int num_scratch_pages;77 off_t pg_start;78 u32 type;79 u32 physical;80 bool is_bound;81 bool is_flushed;82 /* list of agp_memory mapped to the aperture */83 struct list_head mapped_list;84 /* DMA-mapped addresses */85 struct scatterlist *sg_list;86 int num_sg;87};88 89#define AGP_NORMAL_MEMORY 090 91#define AGP_USER_TYPES (1 << 16)92#define AGP_USER_MEMORY (AGP_USER_TYPES)93#define AGP_USER_CACHED_MEMORY (AGP_USER_TYPES + 1)94 95extern struct agp_bridge_data *agp_bridge;96extern struct list_head agp_bridges;97 98extern struct agp_bridge_data *(*agp_find_bridge)(struct pci_dev *);99 100extern void agp_free_memory(struct agp_memory *);101extern struct agp_memory *agp_allocate_memory(struct agp_bridge_data *, size_t, u32);102extern int agp_copy_info(struct agp_bridge_data *, struct agp_kern_info *);103extern int agp_bind_memory(struct agp_memory *, off_t);104extern int agp_unbind_memory(struct agp_memory *);105extern void agp_enable(struct agp_bridge_data *, u32);106extern struct agp_bridge_data *agp_backend_acquire(struct pci_dev *);107extern void agp_backend_release(struct agp_bridge_data *);108 109#endif /* _AGP_BACKEND_H */110