forked from hardkernel/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
drm_mm.h
163 lines (154 loc) · 5.24 KB
/
drm_mm.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
/**************************************************************************
*
* Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. USA.
* All Rights Reserved.
*
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
*
*
**************************************************************************/
/*
* Authors:
* Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
*/
#ifndef _DRM_MM_H_
#define _DRM_MM_H_
/*
* Generic range manager structs
*/
#include <linux/list.h>
#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>
#endif
struct drm_mm_node {
struct list_head free_stack;
struct list_head node_list;
unsigned free : 1;
unsigned scanned_block : 1;
unsigned scanned_prev_free : 1;
unsigned scanned_next_free : 1;
unsigned long start;
unsigned long size;
struct drm_mm *mm;
};
struct drm_mm {
/* List of free memory blocks, most recently freed ordered. */
struct list_head free_stack;
/* List of all memory nodes, ordered according to the (increasing) start
* address of the memory node. */
struct list_head node_list;
struct list_head unused_nodes;
int num_unused;
spinlock_t unused_lock;
unsigned int scan_check_range : 1;
unsigned scan_alignment;
unsigned long scan_size;
unsigned long scan_hit_start;
unsigned scan_hit_size;
unsigned scanned_blocks;
unsigned long scan_start;
unsigned long scan_end;
};
/*
* Basic range manager support (drm_mm.c)
*/
extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
unsigned long size,
unsigned alignment,
int atomic);
extern struct drm_mm_node *drm_mm_get_block_range_generic(
struct drm_mm_node *node,
unsigned long size,
unsigned alignment,
unsigned long start,
unsigned long end,
int atomic);
static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
unsigned long size,
unsigned alignment)
{
return drm_mm_get_block_generic(parent, size, alignment, 0);
}
static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
unsigned long size,
unsigned alignment)
{
return drm_mm_get_block_generic(parent, size, alignment, 1);
}
static inline struct drm_mm_node *drm_mm_get_block_range(
struct drm_mm_node *parent,
unsigned long size,
unsigned alignment,
unsigned long start,
unsigned long end)
{
return drm_mm_get_block_range_generic(parent, size, alignment,
start, end, 0);
}
static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
struct drm_mm_node *parent,
unsigned long size,
unsigned alignment,
unsigned long start,
unsigned long end)
{
return drm_mm_get_block_range_generic(parent, size, alignment,
start, end, 1);
}
extern void drm_mm_put_block(struct drm_mm_node *cur);
extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
unsigned long size,
unsigned alignment,
int best_match);
extern struct drm_mm_node *drm_mm_search_free_in_range(
const struct drm_mm *mm,
unsigned long size,
unsigned alignment,
unsigned long start,
unsigned long end,
int best_match);
extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
unsigned long size);
extern void drm_mm_takedown(struct drm_mm *mm);
extern int drm_mm_clean(struct drm_mm *mm);
extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
unsigned long size);
extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
unsigned long size, int atomic);
extern int drm_mm_pre_get(struct drm_mm *mm);
static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
{
return block->mm;
}
void drm_mm_init_scan(struct drm_mm *mm, unsigned long size,
unsigned alignment);
void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size,
unsigned alignment,
unsigned long start,
unsigned long end);
int drm_mm_scan_add_block(struct drm_mm_node *node);
int drm_mm_scan_remove_block(struct drm_mm_node *node);
extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
#ifdef CONFIG_DEBUG_FS
int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
#endif
#endif