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 struct agp_info {
34 	struct agp_version version;	/* version of the driver        */
35 	u32 bridge_id;		/* bridge vendor/device         */
36 	u32 agp_mode;		/* mode info of bridge          */
37 	unsigned long aper_base;/* base of aperture             */
38 	size_t aper_size;	/* size of aperture             */
39 	size_t pg_total;	/* max pages (swap + system)    */
40 	size_t pg_system;	/* max pages (system)           */
41 	size_t pg_used;		/* current pages used           */
42 };
43 
44 struct agp_setup {
45 	u32 agp_mode;		/* mode info of bridge          */
46 };
47 
48 /*
49  * The "prot" down below needs still a "sleep" flag somehow ...
50  */
51 struct agp_segment {
52 	off_t pg_start;		/* starting page to populate    */
53 	size_t pg_count;	/* number of pages              */
54 	int prot;		/* prot flags for mmap          */
55 };
56 
57 struct agp_segment_priv {
58 	off_t pg_start;
59 	size_t pg_count;
60 	pgprot_t prot;
61 };
62 
63 struct agp_region {
64 	pid_t pid;		/* pid of process               */
65 	size_t seg_count;	/* number of segments           */
66 	struct agp_segment *seg_list;
67 };
68 
69 struct agp_allocate {
70 	int key;		/* tag of allocation            */
71 	size_t pg_count;	/* number of pages              */
72 	u32 type;		/* 0 == normal, other devspec   */
73 	u32 physical;           /* device specific (some devices
74 				 * need a phys address of the
75 				 * actual page behind the gatt
76 				 * table)                        */
77 };
78 
79 struct agp_bind {
80 	int key;		/* tag of allocation            */
81 	off_t pg_start;		/* starting page to populate    */
82 };
83 
84 struct agp_unbind {
85 	int key;		/* tag of allocation            */
86 	u32 priority;		/* priority for paging out      */
87 };
88 
89 struct agp_client {
90 	struct agp_client *next;
91 	struct agp_client *prev;
92 	pid_t pid;
93 	int num_segments;
94 	struct agp_segment_priv **segments;
95 };
96 
97 struct agp_controller {
98 	struct agp_controller *next;
99 	struct agp_controller *prev;
100 	pid_t pid;
101 	int num_clients;
102 	struct agp_memory *pool;
103 	struct agp_client *clients;
104 };
105 
106 #define AGP_FF_ALLOW_CLIENT		0
107 #define AGP_FF_ALLOW_CONTROLLER 	1
108 #define AGP_FF_IS_CLIENT		2
109 #define AGP_FF_IS_CONTROLLER		3
110 #define AGP_FF_IS_VALID 		4
111 
112 struct agp_file_private {
113 	struct agp_file_private *next;
114 	struct agp_file_private *prev;
115 	pid_t my_pid;
116 	unsigned long access_flags;	/* long req'd for set_bit --RR */
117 };
118 
119 struct agp_front_data {
120 	struct mutex agp_mutex;
121 	struct agp_controller *current_controller;
122 	struct agp_controller *controllers;
123 	struct agp_file_private *file_priv_list;
124 	bool used_by_controller;
125 	bool backend_acquired;
126 };
127 
128 #endif				/* _AGP_H */
129