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 #ifdef CONFIG_DEBUG_FS 41 #include <linux/seq_file.h> 42 #endif 43 44 struct drm_mm_node { 45 struct list_head free_stack; 46 struct list_head node_list; 47 int free; 48 unsigned long start; 49 unsigned long size; 50 struct drm_mm *mm; 51 }; 52 53 struct drm_mm { 54 /* List of free memory blocks, most recently freed ordered. */ 55 struct list_head free_stack; 56 /* List of all memory nodes, ordered according to the (increasing) start 57 * address of the memory node. */ 58 struct list_head node_list; 59 struct list_head unused_nodes; 60 int num_unused; 61 spinlock_t unused_lock; 62 }; 63 64 /* 65 * Basic range manager support (drm_mm.c) 66 */ 67 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 68 unsigned long size, 69 unsigned alignment, 70 int atomic); 71 extern struct drm_mm_node *drm_mm_get_block_range_generic( 72 struct drm_mm_node *node, 73 unsigned long size, 74 unsigned alignment, 75 unsigned long start, 76 unsigned long end, 77 int atomic); 78 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 79 unsigned long size, 80 unsigned alignment) 81 { 82 return drm_mm_get_block_generic(parent, size, alignment, 0); 83 } 84 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 85 unsigned long size, 86 unsigned alignment) 87 { 88 return drm_mm_get_block_generic(parent, size, alignment, 1); 89 } 90 static inline struct drm_mm_node *drm_mm_get_block_range( 91 struct drm_mm_node *parent, 92 unsigned long size, 93 unsigned alignment, 94 unsigned long start, 95 unsigned long end) 96 { 97 return drm_mm_get_block_range_generic(parent, size, alignment, 98 start, end, 0); 99 } 100 static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 101 struct drm_mm_node *parent, 102 unsigned long size, 103 unsigned alignment, 104 unsigned long start, 105 unsigned long end) 106 { 107 return drm_mm_get_block_range_generic(parent, size, alignment, 108 start, end, 1); 109 } 110 extern void drm_mm_put_block(struct drm_mm_node *cur); 111 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 112 unsigned long size, 113 unsigned alignment, 114 int best_match); 115 extern struct drm_mm_node *drm_mm_search_free_in_range( 116 const struct drm_mm *mm, 117 unsigned long size, 118 unsigned alignment, 119 unsigned long start, 120 unsigned long end, 121 int best_match); 122 extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 123 unsigned long size); 124 extern void drm_mm_takedown(struct drm_mm *mm); 125 extern int drm_mm_clean(struct drm_mm *mm); 126 extern unsigned long drm_mm_tail_space(struct drm_mm *mm); 127 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, 128 unsigned long size); 129 extern int drm_mm_add_space_to_tail(struct drm_mm *mm, 130 unsigned long size, int atomic); 131 extern int drm_mm_pre_get(struct drm_mm *mm); 132 133 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 134 { 135 return block->mm; 136 } 137 138 extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 139 #ifdef CONFIG_DEBUG_FS 140 int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); 141 #endif 142 143 #endif 144