Merge tag 'upstream-3.7-rc1-fastmap' of git://git.infradead.org/linux-ubi
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / drm / drm_mm.h
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 * Authors:
30 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
31 */
32
33 #ifndef _DRM_MM_H_
34 #define _DRM_MM_H_
35
36 /*
37 * Generic range manager structs
38 */
39 #include <linux/list.h>
40 #ifdef CONFIG_DEBUG_FS
41 #include <linux/seq_file.h>
42 #endif
43
44 struct drm_mm_node {
45 struct list_head node_list;
46 struct list_head hole_stack;
47 unsigned hole_follows : 1;
48 unsigned scanned_block : 1;
49 unsigned scanned_prev_free : 1;
50 unsigned scanned_next_free : 1;
51 unsigned scanned_preceeds_hole : 1;
52 unsigned allocated : 1;
53 unsigned long color;
54 unsigned long start;
55 unsigned long size;
56 struct drm_mm *mm;
57 };
58
59 struct drm_mm {
60 /* List of all memory nodes that immediately precede a free hole. */
61 struct list_head hole_stack;
62 /* head_node.node_list is the list of all memory nodes, ordered
63 * according to the (increasing) start address of the memory node. */
64 struct drm_mm_node head_node;
65 struct list_head unused_nodes;
66 int num_unused;
67 spinlock_t unused_lock;
68 unsigned int scan_check_range : 1;
69 unsigned scan_alignment;
70 unsigned long scan_color;
71 unsigned long scan_size;
72 unsigned long scan_hit_start;
73 unsigned scan_hit_size;
74 unsigned scanned_blocks;
75 unsigned long scan_start;
76 unsigned long scan_end;
77 struct drm_mm_node *prev_scanned_node;
78
79 void (*color_adjust)(struct drm_mm_node *node, unsigned long color,
80 unsigned long *start, unsigned long *end);
81 };
82
83 static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
84 {
85 return node->allocated;
86 }
87
88 static inline bool drm_mm_initialized(struct drm_mm *mm)
89 {
90 return mm->hole_stack.next;
91 }
92 #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
93 &(mm)->head_node.node_list, \
94 node_list)
95 #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \
96 for (entry = (mm)->prev_scanned_node, \
97 next = entry ? list_entry(entry->node_list.next, \
98 struct drm_mm_node, node_list) : NULL; \
99 entry != NULL; entry = next, \
100 next = entry ? list_entry(entry->node_list.next, \
101 struct drm_mm_node, node_list) : NULL) \
102 /*
103 * Basic range manager support (drm_mm.c)
104 */
105 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
106 unsigned long size,
107 unsigned alignment,
108 unsigned long color,
109 int atomic);
110 extern struct drm_mm_node *drm_mm_get_block_range_generic(
111 struct drm_mm_node *node,
112 unsigned long size,
113 unsigned alignment,
114 unsigned long color,
115 unsigned long start,
116 unsigned long end,
117 int atomic);
118 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
119 unsigned long size,
120 unsigned alignment)
121 {
122 return drm_mm_get_block_generic(parent, size, alignment, 0, 0);
123 }
124 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
125 unsigned long size,
126 unsigned alignment)
127 {
128 return drm_mm_get_block_generic(parent, size, alignment, 0, 1);
129 }
130 static inline struct drm_mm_node *drm_mm_get_block_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, 0,
138 start, end, 0);
139 }
140 static inline struct drm_mm_node *drm_mm_get_color_block_range(
141 struct drm_mm_node *parent,
142 unsigned long size,
143 unsigned alignment,
144 unsigned long color,
145 unsigned long start,
146 unsigned long end)
147 {
148 return drm_mm_get_block_range_generic(parent, size, alignment, color,
149 start, end, 0);
150 }
151 static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
152 struct drm_mm_node *parent,
153 unsigned long size,
154 unsigned alignment,
155 unsigned long start,
156 unsigned long end)
157 {
158 return drm_mm_get_block_range_generic(parent, size, alignment, 0,
159 start, end, 1);
160 }
161 extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node,
162 unsigned long size, unsigned alignment);
163 extern int drm_mm_insert_node_in_range(struct drm_mm *mm,
164 struct drm_mm_node *node,
165 unsigned long size, unsigned alignment,
166 unsigned long start, unsigned long end);
167 extern void drm_mm_put_block(struct drm_mm_node *cur);
168 extern void drm_mm_remove_node(struct drm_mm_node *node);
169 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
170 extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,
171 unsigned long size,
172 unsigned alignment,
173 unsigned long color,
174 bool best_match);
175 extern struct drm_mm_node *drm_mm_search_free_in_range_generic(
176 const struct drm_mm *mm,
177 unsigned long size,
178 unsigned alignment,
179 unsigned long color,
180 unsigned long start,
181 unsigned long end,
182 bool best_match);
183 static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
184 unsigned long size,
185 unsigned alignment,
186 bool best_match)
187 {
188 return drm_mm_search_free_generic(mm,size, alignment, 0, best_match);
189 }
190 static inline struct drm_mm_node *drm_mm_search_free_in_range(
191 const struct drm_mm *mm,
192 unsigned long size,
193 unsigned alignment,
194 unsigned long start,
195 unsigned long end,
196 bool best_match)
197 {
198 return drm_mm_search_free_in_range_generic(mm, size, alignment, 0,
199 start, end, best_match);
200 }
201 static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm,
202 unsigned long size,
203 unsigned alignment,
204 unsigned long color,
205 bool best_match)
206 {
207 return drm_mm_search_free_generic(mm,size, alignment, color, best_match);
208 }
209 static inline struct drm_mm_node *drm_mm_search_free_in_range_color(
210 const struct drm_mm *mm,
211 unsigned long size,
212 unsigned alignment,
213 unsigned long color,
214 unsigned long start,
215 unsigned long end,
216 bool best_match)
217 {
218 return drm_mm_search_free_in_range_generic(mm, size, alignment, color,
219 start, end, best_match);
220 }
221 extern int drm_mm_init(struct drm_mm *mm,
222 unsigned long start,
223 unsigned long size);
224 extern void drm_mm_takedown(struct drm_mm *mm);
225 extern int drm_mm_clean(struct drm_mm *mm);
226 extern int drm_mm_pre_get(struct drm_mm *mm);
227
228 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
229 {
230 return block->mm;
231 }
232
233 void drm_mm_init_scan(struct drm_mm *mm,
234 unsigned long size,
235 unsigned alignment,
236 unsigned long color);
237 void drm_mm_init_scan_with_range(struct drm_mm *mm,
238 unsigned long size,
239 unsigned alignment,
240 unsigned long color,
241 unsigned long start,
242 unsigned long end);
243 int drm_mm_scan_add_block(struct drm_mm_node *node);
244 int drm_mm_scan_remove_block(struct drm_mm_node *node);
245
246 extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
247 #ifdef CONFIG_DEBUG_FS
248 int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
249 #endif
250
251 #endif