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 color; 54 unsigned long start; 55 unsigned long size; 56 struct drm_mm *mm; 57 }; 58 59 struct drm_mm { 60 /* List of all memory nodes that immediately precede a free hole. */ 61 struct list_head hole_stack; 62 /* head_node.node_list is the list of all memory nodes, ordered 63 * according to the (increasing) start address of the memory node. */ 64 struct drm_mm_node head_node; 65 struct list_head unused_nodes; 66 int num_unused; 67 spinlock_t unused_lock; 68 unsigned int scan_check_range : 1; 69 unsigned scan_alignment; 70 unsigned long scan_color; 71 unsigned long scan_size; 72 unsigned long scan_hit_start; 73 unsigned scan_hit_size; 74 unsigned scanned_blocks; 75 unsigned long scan_start; 76 unsigned long scan_end; 77 struct drm_mm_node *prev_scanned_node; 78 79 void (*color_adjust)(struct drm_mm_node *node, unsigned long color, 80 unsigned long *start, unsigned long *end); 81 }; 82 83 static inline bool drm_mm_node_allocated(struct drm_mm_node *node) 84 { 85 return node->allocated; 86 } 87 88 static inline bool drm_mm_initialized(struct drm_mm *mm) 89 { 90 return mm->hole_stack.next; 91 } 92 #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ 93 &(mm)->head_node.node_list, \ 94 node_list) 95 #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ 96 for (entry = (mm)->prev_scanned_node, \ 97 next = entry ? list_entry(entry->node_list.next, \ 98 struct drm_mm_node, node_list) : NULL; \ 99 entry != NULL; entry = next, \ 100 next = entry ? list_entry(entry->node_list.next, \ 101 struct drm_mm_node, node_list) : NULL) \ 102 /* 103 * Basic range manager support (drm_mm.c) 104 */ 105 extern struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm, 106 unsigned long start, 107 unsigned long size, 108 bool atomic); 109 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 110 unsigned long size, 111 unsigned alignment, 112 unsigned long color, 113 int atomic); 114 extern struct drm_mm_node *drm_mm_get_block_range_generic( 115 struct drm_mm_node *node, 116 unsigned long size, 117 unsigned alignment, 118 unsigned long color, 119 unsigned long start, 120 unsigned long end, 121 int atomic); 122 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 123 unsigned long size, 124 unsigned alignment) 125 { 126 return drm_mm_get_block_generic(parent, size, alignment, 0, 0); 127 } 128 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 129 unsigned long size, 130 unsigned alignment) 131 { 132 return drm_mm_get_block_generic(parent, size, alignment, 0, 1); 133 } 134 static inline struct drm_mm_node *drm_mm_get_block_range( 135 struct drm_mm_node *parent, 136 unsigned long size, 137 unsigned alignment, 138 unsigned long start, 139 unsigned long end) 140 { 141 return drm_mm_get_block_range_generic(parent, size, alignment, 0, 142 start, end, 0); 143 } 144 static inline struct drm_mm_node *drm_mm_get_color_block_range( 145 struct drm_mm_node *parent, 146 unsigned long size, 147 unsigned alignment, 148 unsigned long color, 149 unsigned long start, 150 unsigned long end) 151 { 152 return drm_mm_get_block_range_generic(parent, size, alignment, color, 153 start, end, 0); 154 } 155 static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 156 struct drm_mm_node *parent, 157 unsigned long size, 158 unsigned alignment, 159 unsigned long start, 160 unsigned long end) 161 { 162 return drm_mm_get_block_range_generic(parent, size, alignment, 0, 163 start, end, 1); 164 } 165 extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node, 166 unsigned long size, unsigned alignment); 167 extern int drm_mm_insert_node_in_range(struct drm_mm *mm, 168 struct drm_mm_node *node, 169 unsigned long size, unsigned alignment, 170 unsigned long start, unsigned long end); 171 extern void drm_mm_put_block(struct drm_mm_node *cur); 172 extern void drm_mm_remove_node(struct drm_mm_node *node); 173 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); 174 extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm, 175 unsigned long size, 176 unsigned alignment, 177 unsigned long color, 178 bool best_match); 179 extern struct drm_mm_node *drm_mm_search_free_in_range_generic( 180 const struct drm_mm *mm, 181 unsigned long size, 182 unsigned alignment, 183 unsigned long color, 184 unsigned long start, 185 unsigned long end, 186 bool best_match); 187 static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 188 unsigned long size, 189 unsigned alignment, 190 bool best_match) 191 { 192 return drm_mm_search_free_generic(mm,size, alignment, 0, best_match); 193 } 194 static inline struct drm_mm_node *drm_mm_search_free_in_range( 195 const struct drm_mm *mm, 196 unsigned long size, 197 unsigned alignment, 198 unsigned long start, 199 unsigned long end, 200 bool best_match) 201 { 202 return drm_mm_search_free_in_range_generic(mm, size, alignment, 0, 203 start, end, best_match); 204 } 205 static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm, 206 unsigned long size, 207 unsigned alignment, 208 unsigned long color, 209 bool best_match) 210 { 211 return drm_mm_search_free_generic(mm,size, alignment, color, best_match); 212 } 213 static inline struct drm_mm_node *drm_mm_search_free_in_range_color( 214 const struct drm_mm *mm, 215 unsigned long size, 216 unsigned alignment, 217 unsigned long color, 218 unsigned long start, 219 unsigned long end, 220 bool best_match) 221 { 222 return drm_mm_search_free_in_range_generic(mm, size, alignment, color, 223 start, end, best_match); 224 } 225 extern int drm_mm_init(struct drm_mm *mm, 226 unsigned long start, 227 unsigned long size); 228 extern void drm_mm_takedown(struct drm_mm *mm); 229 extern int drm_mm_clean(struct drm_mm *mm); 230 extern int drm_mm_pre_get(struct drm_mm *mm); 231 232 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 233 { 234 return block->mm; 235 } 236 237 void drm_mm_init_scan(struct drm_mm *mm, 238 unsigned long size, 239 unsigned alignment, 240 unsigned long color); 241 void drm_mm_init_scan_with_range(struct drm_mm *mm, 242 unsigned long size, 243 unsigned alignment, 244 unsigned long color, 245 unsigned long start, 246 unsigned long end); 247 int drm_mm_scan_add_block(struct drm_mm_node *node); 248 int drm_mm_scan_remove_block(struct drm_mm_node *node); 249 250 extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 251 #ifdef CONFIG_DEBUG_FS 252 int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); 253 #endif 254 255 #endif 256