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/drm/drm_mm.h 203287 2010-01-31 14:25:29Z rnoland $");
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/drm/drm_linux_list.h"
41
42 struct drm_mm_node {
43 struct list_head fl_entry;
44 struct list_head ml_entry;
45 int free;
46 unsigned long start;
47 unsigned long size;
48 struct drm_mm *mm;
49 void *private;
50 };
51
52 struct drm_mm {
53 struct list_head fl_entry;
54 struct list_head ml_entry;
55 struct list_head unused_nodes;
56 int num_unused;
57 struct mtx unused_lock;
58 };
59
60 /*
61 * Basic range manager support (drm_mm.c)
62 */
63 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
64 unsigned long size,
65 unsigned alignment,
66 int atomic);
drm_mm_get_block(struct drm_mm_node * parent,unsigned long size,unsigned alignment)67 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
68 unsigned long size,
69 unsigned alignment)
70 {
71 return drm_mm_get_block_generic(parent, size, alignment, 0);
72 }
drm_mm_get_block_atomic(struct drm_mm_node * parent,unsigned long size,unsigned alignment)73 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
74 unsigned long size,
75 unsigned alignment)
76 {
77 return drm_mm_get_block_generic(parent, size, alignment, 1);
78 }
79 extern void drm_mm_put_block(struct drm_mm_node *cur);
80 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
81 unsigned long size,
82 unsigned alignment,
83 int best_match);
84 extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
85 unsigned long size);
86 extern void drm_mm_takedown(struct drm_mm *mm);
87 extern int drm_mm_clean(struct drm_mm *mm);
88 extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
89 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
90 unsigned long size);
91 extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
92 unsigned long size, int atomic);
93 extern int drm_mm_pre_get(struct drm_mm *mm);
94
drm_get_mm(struct drm_mm_node * block)95 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
96 {
97 return block->mm;
98 }
99
100 #endif
101