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 /*
30 * Authors:
31 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
32 */
33
34 #ifndef _DRM_MM_H_
35 #define _DRM_MM_H_
36
37 #include "drm_linux_list.h"
38
39 struct drm_mm_node {
40 struct list_head fl_entry;
41 struct list_head ml_entry;
42 int free;
43 unsigned long start;
44 unsigned long size;
45 struct drm_mm *mm;
46 void *private;
47 };
48
49 struct drm_mm {
50 struct list_head fl_entry;
51 struct list_head ml_entry;
52 struct list_head unused_nodes;
53 int num_unused;
54 kmutex_t unused_lock;
55 };
56
57 /*
58 * Basic range manager support (drm_mm.c)
59 */
60 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
61 unsigned long size,
62 unsigned alignment,
63 int atomic);
drm_mm_get_block(struct drm_mm_node * parent,unsigned long size,unsigned alignment)64 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
65 unsigned long size,
66 unsigned alignment)
67 {
68 return drm_mm_get_block_generic(parent, size, alignment, 0);
69 }
drm_mm_get_block_atomic(struct drm_mm_node * parent,unsigned long size,unsigned alignment)70 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
71 unsigned long size,
72 unsigned alignment)
73 {
74 return drm_mm_get_block_generic(parent, size, alignment, 1);
75 }
76 extern void drm_mm_put_block(struct drm_mm_node *cur);
77 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
78 unsigned long size,
79 unsigned alignment,
80 int best_match);
81 extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
82 unsigned long size);
83 extern void drm_mm_takedown(struct drm_mm *mm);
84 extern int drm_mm_clean(struct drm_mm *mm);
85 extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
86 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
87 unsigned long size);
88 extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
89 unsigned long size, int atomic);
90 extern int drm_mm_pre_get(struct drm_mm *mm);
91
drm_get_mm(struct drm_mm_node * block)92 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
93 {
94 return block->mm;
95 }
96
97 #endif
98