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[deliverable/linux.git] / include / drm / drm_mm.h
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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>
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40#ifdef CONFIG_DEBUG_FS
41#include <linux/seq_file.h>
42#endif
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43
44struct drm_mm_node {
d1024ce9 45 struct list_head node_list;
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46 struct list_head hole_stack;
47 unsigned hole_follows : 1;
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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;
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54 unsigned long start;
55 unsigned long size;
56 struct drm_mm *mm;
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57};
58
59struct drm_mm {
25985edc 60 /* List of all memory nodes that immediately precede a free hole. */
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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;
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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;
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71 unsigned long scan_size;
72 unsigned long scan_hit_start;
901593f2 73 unsigned long scan_hit_end;
709ea971 74 unsigned scanned_blocks;
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75 unsigned long scan_start;
76 unsigned long scan_end;
ae0cec28 77 struct drm_mm_node *prev_scanned_node;
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78
79 void (*color_adjust)(struct drm_mm_node *node, unsigned long color,
80 unsigned long *start, unsigned long *end);
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81};
82
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83static inline bool drm_mm_node_allocated(struct drm_mm_node *node)
84{
85 return node->allocated;
86}
87
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88static inline bool drm_mm_initialized(struct drm_mm *mm)
89{
ea7b1dd4 90 return mm->hole_stack.next;
31a5b8ce 91}
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92
93static 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
98static 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
104static 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
110static 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
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115#define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \
116 &(mm)->head_node.node_list, \
2bbd4492 117 node_list)
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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) \
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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
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138/*
139 * Basic range manager support (drm_mm.c)
140 */
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141extern struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm,
142 unsigned long start,
143 unsigned long size,
144 bool atomic);
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145extern 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);
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150extern 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,
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155 unsigned long start,
156 unsigned long end,
157 int atomic);
89579f77 158static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
249d6048 159 unsigned long size,
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160 unsigned alignment)
161{
6b9d89b4 162 return drm_mm_get_block_generic(parent, size, alignment, 0, 0);
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163}
164static 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}
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170static 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{
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177 return drm_mm_get_block_range_generic(parent, size, alignment, 0,
178 start, end, 0);
179}
180static 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);
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190}
191static 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,
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199 start, end, 1);
200}
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201
202extern int drm_mm_insert_node(struct drm_mm *mm,
203 struct drm_mm_node *node,
204 unsigned long size,
205 unsigned alignment);
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206extern int drm_mm_insert_node_in_range(struct drm_mm *mm,
207 struct drm_mm_node *node,
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208 unsigned long size,
209 unsigned alignment,
210 unsigned long start,
211 unsigned long end);
212extern 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);
217extern 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 224extern void drm_mm_put_block(struct drm_mm_node *cur);
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225extern void drm_mm_remove_node(struct drm_mm_node *node);
226extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);
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227extern 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);
232extern 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);
240static 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}
247static inline struct drm_mm_node *drm_mm_search_free_in_range(
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248 const struct drm_mm *mm,
249 unsigned long size,
250 unsigned alignment,
251 unsigned long start,
252 unsigned long end,
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253 bool best_match)
254{
255 return drm_mm_search_free_in_range_generic(mm, size, alignment, 0,
256 start, end, best_match);
257}
258static 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}
266static 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}
278extern int drm_mm_init(struct drm_mm *mm,
279 unsigned long start,
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280 unsigned long size);
281extern void drm_mm_takedown(struct drm_mm *mm);
282extern int drm_mm_clean(struct drm_mm *mm);
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283extern int drm_mm_pre_get(struct drm_mm *mm);
284
285static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
286{
287 return block->mm;
288}
289
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290void drm_mm_init_scan(struct drm_mm *mm,
291 unsigned long size,
292 unsigned alignment,
293 unsigned long color);
294void drm_mm_init_scan_with_range(struct drm_mm *mm,
295 unsigned long size,
d935cc61 296 unsigned alignment,
6b9d89b4 297 unsigned long color,
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298 unsigned long start,
299 unsigned long end);
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300int drm_mm_scan_add_block(struct drm_mm_node *node);
301int drm_mm_scan_remove_block(struct drm_mm_node *node);
302
99d7e48e 303extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
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304#ifdef CONFIG_DEBUG_FS
305int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
306#endif
307
249d6048 308#endif
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