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 node_list; 46 struct list_head hole_stack; 47 unsigned hole_follows : 1; 48 unsigned scanned_block : 1; 49 unsigned scanned_prev_free : 1; 50 unsigned scanned_next_free : 1; 51 unsigned scanned_preceeds_hole : 1; 52 unsigned allocated : 1; 53 unsigned long start; 54 unsigned long size; 55 struct drm_mm *mm; 56 }; 57 58 struct drm_mm { 59 /* List of all memory nodes that immediatly preceed a free hole. */ 60 struct list_head hole_stack; 61 /* head_node.node_list is the list of all memory nodes, ordered 62 * according to the (increasing) start address of the memory node. */ 63 struct drm_mm_node head_node; 64 struct list_head unused_nodes; 65 int num_unused; 66 spinlock_t unused_lock; 67 unsigned int scan_check_range : 1; 68 unsigned scan_alignment; 69 unsigned long scan_size; 70 unsigned long scan_hit_start; 71 unsigned scan_hit_size; 72 unsigned scanned_blocks; 73 unsigned long scan_start; 74 unsigned long scan_end; 75 }; 76 77 static inline bool drm_mm_node_allocated(struct drm_mm_node *node) 78 { 79 return node->allocated; 80 } 81 82 static inline bool drm_mm_initialized(struct drm_mm *mm) 83 { 84 return mm->hole_stack.next; 85 } 86 #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ 87 &(mm)->head_node.node_list, \ 88 node_list); 89 /* 90 * Basic range manager support (drm_mm.c) 91 */ 92 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 93 unsigned long size, 94 unsigned alignment, 95 int atomic); 96 extern struct drm_mm_node *drm_mm_get_block_range_generic( 97 struct drm_mm_node *node, 98 unsigned long size, 99 unsigned alignment, 100 unsigned long start, 101 unsigned long end, 102 int atomic); 103 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 104 unsigned long size, 105 unsigned alignment) 106 { 107 return drm_mm_get_block_generic(parent, size, alignment, 0); 108 } 109 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 110 unsigned long size, 111 unsigned alignment) 112 { 113 return drm_mm_get_block_generic(parent, size, alignment, 1); 114 } 115 static inline struct drm_mm_node *drm_mm_get_block_range( 116 struct drm_mm_node *parent, 117 unsigned long size, 118 unsigned alignment, 119 unsigned long start, 120 unsigned long end) 121 { 122 return drm_mm_get_block_range_generic(parent, size, alignment, 123 start, end, 0); 124 } 125 static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 126 struct drm_mm_node *parent, 127 unsigned long size, 128 unsigned alignment, 129 unsigned long start, 130 unsigned long end) 131 { 132 return drm_mm_get_block_range_generic(parent, size, alignment, 133 start, end, 1); 134 } 135 extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node, 136 unsigned long size, unsigned alignment); 137 extern int drm_mm_insert_node_in_range(struct drm_mm *mm, 138 struct drm_mm_node *node, 139 unsigned long size, unsigned alignment, 140 unsigned long start, unsigned long end); 141 extern void drm_mm_put_block(struct drm_mm_node *cur); 142 extern void drm_mm_remove_node(struct drm_mm_node *node); 143 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); 144 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 145 unsigned long size, 146 unsigned alignment, 147 int best_match); 148 extern struct drm_mm_node *drm_mm_search_free_in_range( 149 const struct drm_mm *mm, 150 unsigned long size, 151 unsigned alignment, 152 unsigned long start, 153 unsigned long end, 154 int best_match); 155 extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 156 unsigned long size); 157 extern void drm_mm_takedown(struct drm_mm *mm); 158 extern int drm_mm_clean(struct drm_mm *mm); 159 extern int drm_mm_pre_get(struct drm_mm *mm); 160 161 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 162 { 163 return block->mm; 164 } 165 166 void drm_mm_init_scan(struct drm_mm *mm, unsigned long size, 167 unsigned alignment); 168 void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size, 169 unsigned alignment, 170 unsigned long start, 171 unsigned long end); 172 int drm_mm_scan_add_block(struct drm_mm_node *node); 173 int drm_mm_scan_remove_block(struct drm_mm_node *node); 174 175 extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 176 #ifdef CONFIG_DEBUG_FS 177 int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); 178 #endif 179 180 #endif 181