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Jerome Glisse249d6042009-04-08 17:11:16 +02001/**************************************************************************
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>
Dave Airlief1938cd2009-09-08 11:32:08 +100040#ifdef CONFIG_DEBUG_FS
41#include <linux/seq_file.h>
42#endif
Jerome Glisse249d6042009-04-08 17:11:16 +020043
44struct drm_mm_node {
45 struct list_head fl_entry;
46 struct list_head ml_entry;
47 int free;
48 unsigned long start;
49 unsigned long size;
50 struct drm_mm *mm;
51 void *private;
52};
53
54struct drm_mm {
55 struct list_head fl_entry;
56 struct list_head ml_entry;
57 struct list_head unused_nodes;
58 int num_unused;
59 spinlock_t unused_lock;
60};
61
62/*
63 * Basic range manager support (drm_mm.c)
64 */
Thomas Hellstrom89579f72009-06-17 12:29:56 +020065extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
66 unsigned long size,
67 unsigned alignment,
68 int atomic);
Jerome Glissea2e68e92009-12-07 15:52:56 +010069extern struct drm_mm_node *drm_mm_get_block_range_generic(
70 struct drm_mm_node *node,
71 unsigned long size,
72 unsigned alignment,
73 unsigned long start,
74 unsigned long end,
75 int atomic);
Thomas Hellstrom89579f72009-06-17 12:29:56 +020076static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
Jerome Glisse249d6042009-04-08 17:11:16 +020077 unsigned long size,
Thomas Hellstrom89579f72009-06-17 12:29:56 +020078 unsigned alignment)
79{
80 return drm_mm_get_block_generic(parent, size, alignment, 0);
81}
82static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
83 unsigned long size,
84 unsigned alignment)
85{
86 return drm_mm_get_block_generic(parent, size, alignment, 1);
87}
Jerome Glissea2e68e92009-12-07 15:52:56 +010088static inline struct drm_mm_node *drm_mm_get_block_range(
89 struct drm_mm_node *parent,
90 unsigned long size,
91 unsigned alignment,
92 unsigned long start,
93 unsigned long end)
94{
95 return drm_mm_get_block_range_generic(parent, size, alignment,
96 start, end, 0);
97}
98static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
99 struct drm_mm_node *parent,
100 unsigned long size,
101 unsigned alignment,
102 unsigned long start,
103 unsigned long end)
104{
105 return drm_mm_get_block_range_generic(parent, size, alignment,
106 start, end, 1);
107}
Jerome Glisse249d6042009-04-08 17:11:16 +0200108extern void drm_mm_put_block(struct drm_mm_node *cur);
109extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
110 unsigned long size,
111 unsigned alignment,
112 int best_match);
Jerome Glissea2e68e92009-12-07 15:52:56 +0100113extern struct drm_mm_node *drm_mm_search_free_in_range(
114 const struct drm_mm *mm,
115 unsigned long size,
116 unsigned alignment,
117 unsigned long start,
118 unsigned long end,
119 int best_match);
Jerome Glisse249d6042009-04-08 17:11:16 +0200120extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
121 unsigned long size);
122extern void drm_mm_takedown(struct drm_mm *mm);
123extern int drm_mm_clean(struct drm_mm *mm);
124extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
125extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
126 unsigned long size);
127extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
128 unsigned long size, int atomic);
129extern int drm_mm_pre_get(struct drm_mm *mm);
130
131static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
132{
133 return block->mm;
134}
135
Jerome Glisse99d7e482009-12-09 21:55:09 +0100136extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);
Dave Airliefa8a1232009-08-26 13:13:37 +1000137#ifdef CONFIG_DEBUG_FS
138int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
139#endif
140
Jerome Glisse249d6042009-04-08 17:11:16 +0200141#endif