1 /**************************************************************************
2 *
3 * Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. USA.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 *
27 **************************************************************************/
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: stable/9/sys/dev/drm2/drm_mm.h 249081 2013-04-04 05:39:37Z kib $");
31
32 /*
33 * Authors:
34 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
35 */
36
37 #ifndef _DRM_MM_H_
38 #define _DRM_MM_H_
39
40 #include <dev/drm2/drm_linux_list.h>
41
42 struct drm_mm_node {
43 struct list_head node_list;
44 struct list_head hole_stack;
45 unsigned hole_follows : 1;
46 unsigned scanned_block : 1;
47 unsigned scanned_prev_free : 1;
48 unsigned scanned_next_free : 1;
49 unsigned scanned_preceeds_hole : 1;
50 unsigned allocated : 1;
51 unsigned long start;
52 unsigned long size;
53 struct drm_mm *mm;
54 void *private;
55 };
56
57 struct drm_mm {
58 struct list_head hole_stack;
59 struct drm_mm_node head_node;
60 struct list_head unused_nodes;
61 int num_unused;
62 struct mtx unused_lock;
63 unsigned int scan_check_range : 1;
64 unsigned scan_alignment;
65 unsigned long scan_size;
66 unsigned long scan_hit_start;
67 unsigned scan_hit_size;
68 unsigned scanned_blocks;
69 unsigned long scan_start;
70 unsigned long scan_end;
71 struct drm_mm_node *prev_scanned_node;
72 };
73
drm_mm_node_allocated(struct drm_mm_node * node)74 static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
75 {
76 return node->allocated;
77 }
78
drm_mm_initialized(struct drm_mm * mm)79 static inline bool drm_mm_initialized(struct drm_mm *mm)
80 {
81 return (mm->hole_stack.next != NULL);
82 }
83 #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
84 &(mm)->head_node.node_list, \
85 node_list)
86 #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \
87 for (entry = (mm)->prev_scanned_node, \
88 next = entry ? list_entry(entry->node_list.next, \
89 struct drm_mm_node, node_list) : NULL; \
90 entry != NULL; entry = next, \
91 next = entry ? list_entry(entry->node_list.next, \
92 struct drm_mm_node, node_list) : NULL)
93
94 /*
95 * Basic range manager support (drm_mm.c)
96 */
97 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
98 unsigned long size,
99 unsigned alignment,
100 int atomic);
101 extern struct drm_mm_node *drm_mm_get_block_range_generic(
102 struct drm_mm_node *node,
103 unsigned long size,
104 unsigned alignment,
105 unsigned long start,
106 unsigned long end,
107 int atomic);
drm_mm_get_block(struct drm_mm_node * parent,unsigned long size,unsigned alignment)108 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
109 unsigned long size,
110 unsigned alignment)
111 {
112 return drm_mm_get_block_generic(parent, size, alignment, 0);
113 }
drm_mm_get_block_atomic(struct drm_mm_node * parent,unsigned long size,unsigned alignment)114 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
115 unsigned long size,
116 unsigned alignment)
117 {
118 return drm_mm_get_block_generic(parent, size, alignment, 1);
119 }
drm_mm_get_block_range(struct drm_mm_node * parent,unsigned long size,unsigned alignment,unsigned long start,unsigned long end)120 static inline struct drm_mm_node *drm_mm_get_block_range(
121 struct drm_mm_node *parent,
122 unsigned long size,
123 unsigned alignment,
124 unsigned long start,
125 unsigned long end)
126 {
127 return drm_mm_get_block_range_generic(parent, size, alignment,
128 start, end, 0);
129 }
drm_mm_get_block_atomic_range(struct drm_mm_node * parent,unsigned long size,unsigned alignment,unsigned long start,unsigned long end)130 static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
131 struct drm_mm_node *parent,
132 unsigned long size,
133 unsigned alignment,
134 unsigned long start,
135 unsigned long end)
136 {
137 return drm_mm_get_block_range_generic(parent, size, alignment,
138 start, end, 1);
139 }
140 extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node,
141 unsigned long size, unsigned alignment);
142 extern int drm_mm_insert_node_in_range(struct drm_mm *mm,
143 struct drm_mm_node *node,
144 unsigned long size, unsigned alignment,
145 unsigned long start, unsigned long end);
146 extern void drm_mm_put_block(struct drm_mm_node *cur);
147 extern void drm_mm_remove_node(struct drm_mm_node *node);
148 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
149 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
150 unsigned long size,
151 unsigned alignment,
152 int best_match);
153 extern struct drm_mm_node *drm_mm_search_free_in_range(
154 const struct drm_mm *mm,
155 unsigned long size,
156 unsigned alignment,
157 unsigned long start,
158 unsigned long end,
159 int best_match);
160 extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
161 unsigned long size);
162 extern void drm_mm_takedown(struct drm_mm *mm);
163 extern int drm_mm_clean(struct drm_mm *mm);
164 extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
165 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
166 unsigned long size);
167 extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
168 unsigned long size, int atomic);
169 extern int drm_mm_pre_get(struct drm_mm *mm);
170
drm_get_mm(struct drm_mm_node * block)171 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
172 {
173 return block->mm;
174 }
175
176 void drm_mm_init_scan(struct drm_mm *mm, unsigned long size,
177 unsigned alignment);
178 void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size,
179 unsigned alignment,
180 unsigned long start,
181 unsigned long end);
182 int drm_mm_scan_add_block(struct drm_mm_node *node);
183 int drm_mm_scan_remove_block(struct drm_mm_node *node);
184
185 void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
186
187 #endif
188