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 #include <linux/spinlock.h> 44 45 struct drm_mm_node { 46 struct list_head node_list; 47 struct list_head hole_stack; 48 unsigned hole_follows : 1; 49 unsigned scanned_block : 1; 50 unsigned scanned_prev_free : 1; 51 unsigned scanned_next_free : 1; 52 unsigned scanned_preceeds_hole : 1; 53 unsigned allocated : 1; 54 unsigned long color; 55 unsigned long start; 56 unsigned long size; 57 struct drm_mm *mm; 58 }; 59 60 struct drm_mm { 61 /* List of all memory nodes that immediately precede a free hole. */ 62 struct list_head hole_stack; 63 /* head_node.node_list is the list of all memory nodes, ordered 64 * according to the (increasing) start address of the memory node. */ 65 struct drm_mm_node head_node; 66 struct list_head unused_nodes; 67 int num_unused; 68 spinlock_t unused_lock; 69 unsigned int scan_check_range : 1; 70 unsigned scan_alignment; 71 unsigned long scan_color; 72 unsigned long scan_size; 73 unsigned long scan_hit_start; 74 unsigned long scan_hit_end; 75 unsigned scanned_blocks; 76 unsigned long scan_start; 77 unsigned long scan_end; 78 struct drm_mm_node *prev_scanned_node; 79 80 void (*color_adjust)(struct drm_mm_node *node, unsigned long color, 81 unsigned long *start, unsigned long *end); 82 }; 83 84 static inline bool drm_mm_node_allocated(struct drm_mm_node *node) 85 { 86 return node->allocated; 87 } 88 89 static inline bool drm_mm_initialized(struct drm_mm *mm) 90 { 91 return mm->hole_stack.next; 92 } 93 #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ 94 &(mm)->head_node.node_list, \ 95 node_list) 96 #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ 97 for (entry = (mm)->prev_scanned_node, \ 98 next = entry ? list_entry(entry->node_list.next, \ 99 struct drm_mm_node, node_list) : NULL; \ 100 entry != NULL; entry = next, \ 101 next = entry ? list_entry(entry->node_list.next, \ 102 struct drm_mm_node, node_list) : NULL) \ 103 /* 104 * Basic range manager support (drm_mm.c) 105 */ 106 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 107 unsigned long size, 108 unsigned alignment, 109 unsigned long color, 110 int atomic); 111 extern struct drm_mm_node *drm_mm_get_block_range_generic( 112 struct drm_mm_node *node, 113 unsigned long size, 114 unsigned alignment, 115 unsigned long color, 116 unsigned long start, 117 unsigned long end, 118 int atomic); 119 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 120 unsigned long size, 121 unsigned alignment) 122 { 123 return drm_mm_get_block_generic(parent, size, alignment, 0, 0); 124 } 125 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 126 unsigned long size, 127 unsigned alignment) 128 { 129 return drm_mm_get_block_generic(parent, size, alignment, 0, 1); 130 } 131 static inline struct drm_mm_node *drm_mm_get_block_range( 132 struct drm_mm_node *parent, 133 unsigned long size, 134 unsigned alignment, 135 unsigned long start, 136 unsigned long end) 137 { 138 return drm_mm_get_block_range_generic(parent, size, alignment, 0, 139 start, end, 0); 140 } 141 static inline struct drm_mm_node *drm_mm_get_color_block_range( 142 struct drm_mm_node *parent, 143 unsigned long size, 144 unsigned alignment, 145 unsigned long color, 146 unsigned long start, 147 unsigned long end) 148 { 149 return drm_mm_get_block_range_generic(parent, size, alignment, color, 150 start, end, 0); 151 } 152 static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 153 struct drm_mm_node *parent, 154 unsigned long size, 155 unsigned alignment, 156 unsigned long start, 157 unsigned long end) 158 { 159 return drm_mm_get_block_range_generic(parent, size, alignment, 0, 160 start, end, 1); 161 } 162 163 extern int drm_mm_insert_node(struct drm_mm *mm, 164 struct drm_mm_node *node, 165 unsigned long size, 166 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, 170 unsigned alignment, 171 unsigned long start, 172 unsigned long end); 173 extern int drm_mm_insert_node_generic(struct drm_mm *mm, 174 struct drm_mm_node *node, 175 unsigned long size, 176 unsigned alignment, 177 unsigned long color); 178 extern int drm_mm_insert_node_in_range_generic(struct drm_mm *mm, 179 struct drm_mm_node *node, 180 unsigned long size, 181 unsigned alignment, 182 unsigned long color, 183 unsigned long start, 184 unsigned long end); 185 extern void drm_mm_put_block(struct drm_mm_node *cur); 186 extern void drm_mm_remove_node(struct drm_mm_node *node); 187 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); 188 extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm, 189 unsigned long size, 190 unsigned alignment, 191 unsigned long color, 192 bool best_match); 193 extern struct drm_mm_node *drm_mm_search_free_in_range_generic( 194 const struct drm_mm *mm, 195 unsigned long size, 196 unsigned alignment, 197 unsigned long color, 198 unsigned long start, 199 unsigned long end, 200 bool best_match); 201 static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 202 unsigned long size, 203 unsigned alignment, 204 bool best_match) 205 { 206 return drm_mm_search_free_generic(mm,size, alignment, 0, best_match); 207 } 208 static inline struct drm_mm_node *drm_mm_search_free_in_range( 209 const struct drm_mm *mm, 210 unsigned long size, 211 unsigned alignment, 212 unsigned long start, 213 unsigned long end, 214 bool best_match) 215 { 216 return drm_mm_search_free_in_range_generic(mm, size, alignment, 0, 217 start, end, best_match); 218 } 219 static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm, 220 unsigned long size, 221 unsigned alignment, 222 unsigned long color, 223 bool best_match) 224 { 225 return drm_mm_search_free_generic(mm,size, alignment, color, best_match); 226 } 227 static inline struct drm_mm_node *drm_mm_search_free_in_range_color( 228 const struct drm_mm *mm, 229 unsigned long size, 230 unsigned alignment, 231 unsigned long color, 232 unsigned long start, 233 unsigned long end, 234 bool best_match) 235 { 236 return drm_mm_search_free_in_range_generic(mm, size, alignment, color, 237 start, end, best_match); 238 } 239 extern int drm_mm_init(struct drm_mm *mm, 240 unsigned long start, 241 unsigned long size); 242 extern void drm_mm_takedown(struct drm_mm *mm); 243 extern int drm_mm_clean(struct drm_mm *mm); 244 extern int drm_mm_pre_get(struct drm_mm *mm); 245 246 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 247 { 248 return block->mm; 249 } 250 251 void drm_mm_init_scan(struct drm_mm *mm, 252 unsigned long size, 253 unsigned alignment, 254 unsigned long color); 255 void drm_mm_init_scan_with_range(struct drm_mm *mm, 256 unsigned long size, 257 unsigned alignment, 258 unsigned long color, 259 unsigned long start, 260 unsigned long end); 261 int drm_mm_scan_add_block(struct drm_mm_node *node); 262 int drm_mm_scan_remove_block(struct drm_mm_node *node); 263 264 extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 265 #ifdef CONFIG_DEBUG_FS 266 int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); 267 #endif 268 269 #endif 270