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gerrit-public.fairphone.software / kernel / msm-4.19 / 53ca5c916971f72262ef37287e17f0a7d980362c / . / include / drm / drm_mm.h
blob: f8332073d277734bbee82d8cd1359519743209a9 [file] [log] [blame]
Jerome Glisse249d6042009-04-08 17:11:16 +0200[diff] [blame]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>
40
41struct drm_mm_node {
42 struct list_head fl_entry;
43 struct list_head ml_entry;
44 int free;
45 unsigned long start;
46 unsigned long size;
47 struct drm_mm *mm;
48 void *private;
49};
50
51struct drm_mm {
52 struct list_head fl_entry;
53 struct list_head ml_entry;
54 struct list_head unused_nodes;
55 int num_unused;
56 spinlock_t unused_lock;
57};
58
59/*
60 * Basic range manager support (drm_mm.c)
61 */
Thomas Hellstrom89579f72009-06-17 12:29:56 +0200[diff] [blame]62extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
63 unsigned long size,
64 unsigned alignment,
65 int atomic);
66static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
Jerome Glisse249d6042009-04-08 17:11:16 +0200[diff] [blame]67 unsigned long size,
Thomas Hellstrom89579f72009-06-17 12:29:56 +0200[diff] [blame]68 unsigned alignment)
69{
70 return drm_mm_get_block_generic(parent, size, alignment, 0);
71}
72static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
73 unsigned long size,
74 unsigned alignment)
75{
76 return drm_mm_get_block_generic(parent, size, alignment, 1);
77}
Jerome Glisse249d6042009-04-08 17:11:16 +0200[diff] [blame]78extern void drm_mm_put_block(struct drm_mm_node *cur);
79extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
80 unsigned long size,
81 unsigned alignment,
82 int best_match);
83extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
84 unsigned long size);
85extern void drm_mm_takedown(struct drm_mm *mm);
86extern int drm_mm_clean(struct drm_mm *mm);
87extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
88extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
89 unsigned long size);
90extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
91 unsigned long size, int atomic);
92extern int drm_mm_pre_get(struct drm_mm *mm);
93
94static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
95{
96 return block->mm;
97}
98
99#endif