1 /*
2  * AGPGART module version 0.99
3  * Copyright (C) 1999 Jeff Hartmann
4  * Copyright (C) 1999 Precision Insight, Inc.
5  * Copyright (C) 1999 Xi Graphics, Inc.
6  *
7  * Permission is hereby granted, free of charge, to any person obtaining a
8  * copy of this software and associated documentation files (the "Software"),
9  * to deal in the Software without restriction, including without limitation
10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11  * and/or sell copies of the Software, and to permit persons to whom the
12  * Software is furnished to do so, subject to the following conditions:
13  *
14  * The above copyright notice and this permission notice shall be included
15  * in all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20  * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
23  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  */
26 #ifndef _AGP_H
27 #define _AGP_H 1
28 
29 #include <linux/mutex.h>
30 #include <linux/agp_backend.h>
31 #include <uapi/linux/agpgart.h>
32 
33 #define AGPGART_MINOR 175
34 
35 struct agp_info {
36 	struct agp_version version;	/* version of the driver        */
37 	u32 bridge_id;		/* bridge vendor/device         */
38 	u32 agp_mode;		/* mode info of bridge          */
39 	unsigned long aper_base;/* base of aperture             */
40 	size_t aper_size;	/* size of aperture             */
41 	size_t pg_total;	/* max pages (swap + system)    */
42 	size_t pg_system;	/* max pages (system)           */
43 	size_t pg_used;		/* current pages used           */
44 };
45 
46 struct agp_setup {
47 	u32 agp_mode;		/* mode info of bridge          */
48 };
49 
50 /*
51  * The "prot" down below needs still a "sleep" flag somehow ...
52  */
53 struct agp_segment {
54 	off_t pg_start;		/* starting page to populate    */
55 	size_t pg_count;	/* number of pages              */
56 	int prot;		/* prot flags for mmap          */
57 };
58 
59 struct agp_segment_priv {
60 	off_t pg_start;
61 	size_t pg_count;
62 	pgprot_t prot;
63 };
64 
65 struct agp_region {
66 	pid_t pid;		/* pid of process               */
67 	size_t seg_count;	/* number of segments           */
68 	struct agp_segment *seg_list;
69 };
70 
71 struct agp_allocate {
72 	int key;		/* tag of allocation            */
73 	size_t pg_count;	/* number of pages              */
74 	u32 type;		/* 0 == normal, other devspec   */
75 	u32 physical;           /* device specific (some devices
76 				 * need a phys address of the
77 				 * actual page behind the gatt
78 				 * table)                        */
79 };
80 
81 struct agp_bind {
82 	int key;		/* tag of allocation            */
83 	off_t pg_start;		/* starting page to populate    */
84 };
85 
86 struct agp_unbind {
87 	int key;		/* tag of allocation            */
88 	u32 priority;		/* priority for paging out      */
89 };
90 
91 struct agp_client {
92 	struct agp_client *next;
93 	struct agp_client *prev;
94 	pid_t pid;
95 	int num_segments;
96 	struct agp_segment_priv **segments;
97 };
98 
99 struct agp_controller {
100 	struct agp_controller *next;
101 	struct agp_controller *prev;
102 	pid_t pid;
103 	int num_clients;
104 	struct agp_memory *pool;
105 	struct agp_client *clients;
106 };
107 
108 #define AGP_FF_ALLOW_CLIENT		0
109 #define AGP_FF_ALLOW_CONTROLLER 	1
110 #define AGP_FF_IS_CLIENT		2
111 #define AGP_FF_IS_CONTROLLER		3
112 #define AGP_FF_IS_VALID 		4
113 
114 struct agp_file_private {
115 	struct agp_file_private *next;
116 	struct agp_file_private *prev;
117 	pid_t my_pid;
118 	unsigned long access_flags;	/* long req'd for set_bit --RR */
119 };
120 
121 struct agp_front_data {
122 	struct mutex agp_mutex;
123 	struct agp_controller *current_controller;
124 	struct agp_controller *controllers;
125 	struct agp_file_private *file_priv_list;
126 	bool used_by_controller;
127 	bool backend_acquired;
128 };
129 
130 #endif				/* _AGP_H */
131