cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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agp_backend.h (3534B)

      1/*
      2 * AGPGART backend specific includes. Not for userspace consumption.
      3 *
      4 * Copyright (C) 2004 Silicon Graphics, Inc.
      5 * Copyright (C) 2002-2003 Dave Jones
      6 * Copyright (C) 1999 Jeff Hartmann
      7 * 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 a
     11 * copy of this software and associated documentation files (the "Software"),
     12 * to deal in the Software without restriction, including without limitation
     13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     14 * and/or sell copies of the Software, and to permit persons to whom the
     15 * Software is furnished to do so, subject to the following conditions:
     16 *
     17 * The above copyright notice and this permission notice shall be included
     18 * in all copies or substantial portions of the Software.
     19 *
     20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     23 * 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_H
     31#define _AGP_BACKEND_H 1
     32
     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 memory
     61 * allocated.  A caller may manipulate the next and prev pointers to link
     62 * 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 of
     64 * 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 0
     90
     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 */