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249d6048 JG |
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> | |
f1938cd6 DA |
40 | #ifdef CONFIG_DEBUG_FS |
41 | #include <linux/seq_file.h> | |
42 | #endif | |
249d6048 JG |
43 | |
44 | struct drm_mm_node { | |
d1024ce9 | 45 | struct list_head node_list; |
ea7b1dd4 DV |
46 | struct list_head hole_stack; |
47 | unsigned hole_follows : 1; | |
709ea971 DV |
48 | unsigned scanned_block : 1; |
49 | unsigned scanned_prev_free : 1; | |
50 | unsigned scanned_next_free : 1; | |
ea7b1dd4 | 51 | unsigned scanned_preceeds_hole : 1; |
b0b7af18 | 52 | unsigned allocated : 1; |
6b9d89b4 | 53 | unsigned long color; |
249d6048 JG |
54 | unsigned long start; |
55 | unsigned long size; | |
56 | struct drm_mm *mm; | |
249d6048 JG |
57 | }; |
58 | ||
59 | struct drm_mm { | |
25985edc | 60 | /* List of all memory nodes that immediately precede a free hole. */ |
ea7b1dd4 DV |
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; | |
249d6048 JG |
65 | struct list_head unused_nodes; |
66 | int num_unused; | |
67 | spinlock_t unused_lock; | |
d935cc61 | 68 | unsigned int scan_check_range : 1; |
709ea971 | 69 | unsigned scan_alignment; |
6b9d89b4 | 70 | unsigned long scan_color; |
709ea971 DV |
71 | unsigned long scan_size; |
72 | unsigned long scan_hit_start; | |
901593f2 | 73 | unsigned long scan_hit_end; |
709ea971 | 74 | unsigned scanned_blocks; |
d935cc61 DV |
75 | unsigned long scan_start; |
76 | unsigned long scan_end; | |
ae0cec28 | 77 | struct drm_mm_node *prev_scanned_node; |
6b9d89b4 CW |
78 | |
79 | void (*color_adjust)(struct drm_mm_node *node, unsigned long color, | |
80 | unsigned long *start, unsigned long *end); | |
249d6048 JG |
81 | }; |
82 | ||
b0b7af18 DV |
83 | static inline bool drm_mm_node_allocated(struct drm_mm_node *node) |
84 | { | |
85 | return node->allocated; | |
86 | } | |
87 | ||
31a5b8ce DV |
88 | static inline bool drm_mm_initialized(struct drm_mm *mm) |
89 | { | |
ea7b1dd4 | 90 | return mm->hole_stack.next; |
31a5b8ce | 91 | } |
9e8944ab CW |
92 | |
93 | static inline unsigned long __drm_mm_hole_node_start(struct drm_mm_node *hole_node) | |
94 | { | |
95 | return hole_node->start + hole_node->size; | |
96 | } | |
97 | ||
98 | static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node) | |
99 | { | |
100 | BUG_ON(!hole_node->hole_follows); | |
101 | return __drm_mm_hole_node_start(hole_node); | |
102 | } | |
103 | ||
104 | static inline unsigned long __drm_mm_hole_node_end(struct drm_mm_node *hole_node) | |
105 | { | |
106 | return list_entry(hole_node->node_list.next, | |
107 | struct drm_mm_node, node_list)->start; | |
108 | } | |
109 | ||
110 | static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node) | |
111 | { | |
112 | return __drm_mm_hole_node_end(hole_node); | |
113 | } | |
114 | ||
ea7b1dd4 DV |
115 | #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ |
116 | &(mm)->head_node.node_list, \ | |
2bbd4492 | 117 | node_list) |
ae0cec28 DV |
118 | #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ |
119 | for (entry = (mm)->prev_scanned_node, \ | |
120 | next = entry ? list_entry(entry->node_list.next, \ | |
121 | struct drm_mm_node, node_list) : NULL; \ | |
122 | entry != NULL; entry = next, \ | |
123 | next = entry ? list_entry(entry->node_list.next, \ | |
124 | struct drm_mm_node, node_list) : NULL) \ | |
9e8944ab CW |
125 | |
126 | /* Note that we need to unroll list_for_each_entry in order to inline | |
127 | * setting hole_start and hole_end on each iteration and keep the | |
128 | * macro sane. | |
129 | */ | |
130 | #define drm_mm_for_each_hole(entry, mm, hole_start, hole_end) \ | |
131 | for (entry = list_entry((mm)->hole_stack.next, struct drm_mm_node, hole_stack); \ | |
132 | &entry->hole_stack != &(mm)->hole_stack ? \ | |
133 | hole_start = drm_mm_hole_node_start(entry), \ | |
134 | hole_end = drm_mm_hole_node_end(entry), \ | |
135 | 1 : 0; \ | |
136 | entry = list_entry(entry->hole_stack.next, struct drm_mm_node, hole_stack)) | |
137 | ||
249d6048 JG |
138 | /* |
139 | * Basic range manager support (drm_mm.c) | |
140 | */ | |
5973c7ee CW |
141 | extern struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm, |
142 | unsigned long start, | |
143 | unsigned long size, | |
144 | bool atomic); | |
89579f77 TH |
145 | extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, |
146 | unsigned long size, | |
147 | unsigned alignment, | |
6b9d89b4 | 148 | unsigned long color, |
89579f77 | 149 | int atomic); |
a2e68e92 JG |
150 | extern struct drm_mm_node *drm_mm_get_block_range_generic( |
151 | struct drm_mm_node *node, | |
152 | unsigned long size, | |
153 | unsigned alignment, | |
6b9d89b4 | 154 | unsigned long color, |
a2e68e92 JG |
155 | unsigned long start, |
156 | unsigned long end, | |
157 | int atomic); | |
89579f77 | 158 | static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, |
249d6048 | 159 | unsigned long size, |
89579f77 TH |
160 | unsigned alignment) |
161 | { | |
6b9d89b4 | 162 | return drm_mm_get_block_generic(parent, size, alignment, 0, 0); |
89579f77 TH |
163 | } |
164 | static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, | |
165 | unsigned long size, | |
166 | unsigned alignment) | |
167 | { | |
6b9d89b4 | 168 | return drm_mm_get_block_generic(parent, size, alignment, 0, 1); |
89579f77 | 169 | } |
a2e68e92 JG |
170 | static inline struct drm_mm_node *drm_mm_get_block_range( |
171 | struct drm_mm_node *parent, | |
172 | unsigned long size, | |
173 | unsigned alignment, | |
174 | unsigned long start, | |
175 | unsigned long end) | |
176 | { | |
6b9d89b4 CW |
177 | return drm_mm_get_block_range_generic(parent, size, alignment, 0, |
178 | start, end, 0); | |
179 | } | |
180 | static inline struct drm_mm_node *drm_mm_get_color_block_range( | |
181 | struct drm_mm_node *parent, | |
182 | unsigned long size, | |
183 | unsigned alignment, | |
184 | unsigned long color, | |
185 | unsigned long start, | |
186 | unsigned long end) | |
187 | { | |
188 | return drm_mm_get_block_range_generic(parent, size, alignment, color, | |
189 | start, end, 0); | |
a2e68e92 JG |
190 | } |
191 | static inline struct drm_mm_node *drm_mm_get_block_atomic_range( | |
192 | struct drm_mm_node *parent, | |
193 | unsigned long size, | |
194 | unsigned alignment, | |
195 | unsigned long start, | |
196 | unsigned long end) | |
197 | { | |
6b9d89b4 | 198 | return drm_mm_get_block_range_generic(parent, size, alignment, 0, |
a2e68e92 JG |
199 | start, end, 1); |
200 | } | |
b8103450 CW |
201 | |
202 | extern int drm_mm_insert_node(struct drm_mm *mm, | |
203 | struct drm_mm_node *node, | |
204 | unsigned long size, | |
205 | unsigned alignment); | |
b0b7af18 DV |
206 | extern int drm_mm_insert_node_in_range(struct drm_mm *mm, |
207 | struct drm_mm_node *node, | |
b8103450 CW |
208 | unsigned long size, |
209 | unsigned alignment, | |
210 | unsigned long start, | |
211 | unsigned long end); | |
212 | extern int drm_mm_insert_node_generic(struct drm_mm *mm, | |
213 | struct drm_mm_node *node, | |
214 | unsigned long size, | |
215 | unsigned alignment, | |
216 | unsigned long color); | |
217 | extern int drm_mm_insert_node_in_range_generic(struct drm_mm *mm, | |
218 | struct drm_mm_node *node, | |
219 | unsigned long size, | |
220 | unsigned alignment, | |
221 | unsigned long color, | |
222 | unsigned long start, | |
223 | unsigned long end); | |
249d6048 | 224 | extern void drm_mm_put_block(struct drm_mm_node *cur); |
b0b7af18 DV |
225 | extern void drm_mm_remove_node(struct drm_mm_node *node); |
226 | extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); | |
6b9d89b4 CW |
227 | extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm, |
228 | unsigned long size, | |
229 | unsigned alignment, | |
230 | unsigned long color, | |
231 | bool best_match); | |
232 | extern struct drm_mm_node *drm_mm_search_free_in_range_generic( | |
233 | const struct drm_mm *mm, | |
234 | unsigned long size, | |
235 | unsigned alignment, | |
236 | unsigned long color, | |
237 | unsigned long start, | |
238 | unsigned long end, | |
239 | bool best_match); | |
240 | static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, | |
241 | unsigned long size, | |
242 | unsigned alignment, | |
243 | bool best_match) | |
244 | { | |
245 | return drm_mm_search_free_generic(mm,size, alignment, 0, best_match); | |
246 | } | |
247 | static inline struct drm_mm_node *drm_mm_search_free_in_range( | |
a2e68e92 JG |
248 | const struct drm_mm *mm, |
249 | unsigned long size, | |
250 | unsigned alignment, | |
251 | unsigned long start, | |
252 | unsigned long end, | |
6b9d89b4 CW |
253 | bool best_match) |
254 | { | |
255 | return drm_mm_search_free_in_range_generic(mm, size, alignment, 0, | |
256 | start, end, best_match); | |
257 | } | |
258 | static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm, | |
259 | unsigned long size, | |
260 | unsigned alignment, | |
261 | unsigned long color, | |
262 | bool best_match) | |
263 | { | |
264 | return drm_mm_search_free_generic(mm,size, alignment, color, best_match); | |
265 | } | |
266 | static inline struct drm_mm_node *drm_mm_search_free_in_range_color( | |
267 | const struct drm_mm *mm, | |
268 | unsigned long size, | |
269 | unsigned alignment, | |
270 | unsigned long color, | |
271 | unsigned long start, | |
272 | unsigned long end, | |
273 | bool best_match) | |
274 | { | |
275 | return drm_mm_search_free_in_range_generic(mm, size, alignment, color, | |
276 | start, end, best_match); | |
277 | } | |
278 | extern int drm_mm_init(struct drm_mm *mm, | |
279 | unsigned long start, | |
249d6048 JG |
280 | unsigned long size); |
281 | extern void drm_mm_takedown(struct drm_mm *mm); | |
282 | extern int drm_mm_clean(struct drm_mm *mm); | |
249d6048 JG |
283 | extern int drm_mm_pre_get(struct drm_mm *mm); |
284 | ||
285 | static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) | |
286 | { | |
287 | return block->mm; | |
288 | } | |
289 | ||
6b9d89b4 CW |
290 | void drm_mm_init_scan(struct drm_mm *mm, |
291 | unsigned long size, | |
292 | unsigned alignment, | |
293 | unsigned long color); | |
294 | void drm_mm_init_scan_with_range(struct drm_mm *mm, | |
295 | unsigned long size, | |
d935cc61 | 296 | unsigned alignment, |
6b9d89b4 | 297 | unsigned long color, |
d935cc61 DV |
298 | unsigned long start, |
299 | unsigned long end); | |
709ea971 DV |
300 | int drm_mm_scan_add_block(struct drm_mm_node *node); |
301 | int drm_mm_scan_remove_block(struct drm_mm_node *node); | |
302 | ||
99d7e48e | 303 | extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); |
fa8a1238 DA |
304 | #ifdef CONFIG_DEBUG_FS |
305 | int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); | |
306 | #endif | |
307 | ||
249d6048 | 308 | #endif |