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 #include <sys/cdefs.h> 34 #ifndef _DRM_MM_H_ 35 #define _DRM_MM_H_ 36 37 /* 38 * Generic range manager structs 39 */ 40 #include <dev/drm2/drm_linux_list.h> 41 42 struct drm_mm_node { 43 struct list_head node_list; 44 struct list_head hole_stack; 45 unsigned hole_follows : 1; 46 unsigned scanned_block : 1; 47 unsigned scanned_prev_free : 1; 48 unsigned scanned_next_free : 1; 49 unsigned scanned_preceeds_hole : 1; 50 unsigned allocated : 1; 51 unsigned long color; 52 unsigned long start; 53 unsigned long size; 54 struct drm_mm *mm; 55 }; 56 57 struct drm_mm { 58 /* List of all memory nodes that immediately precede a free hole. */ 59 struct list_head hole_stack; 60 /* head_node.node_list is the list of all memory nodes, ordered 61 * according to the (increasing) start address of the memory node. */ 62 struct drm_mm_node head_node; 63 struct list_head unused_nodes; 64 int num_unused; 65 struct mtx unused_lock; 66 unsigned int scan_check_range : 1; 67 unsigned scan_alignment; 68 unsigned long scan_color; 69 unsigned long scan_size; 70 unsigned long scan_hit_start; 71 unsigned long scan_hit_end; 72 unsigned scanned_blocks; 73 unsigned long scan_start; 74 unsigned long scan_end; 75 struct drm_mm_node *prev_scanned_node; 76 77 void (*color_adjust)(struct drm_mm_node *node, unsigned long color, 78 unsigned long *start, unsigned long *end); 79 }; 80 81 static inline bool drm_mm_node_allocated(struct drm_mm_node *node) 82 { 83 return node->allocated; 84 } 85 86 static inline bool drm_mm_initialized(struct drm_mm *mm) 87 { 88 return mm->hole_stack.next; 89 } 90 #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ 91 &(mm)->head_node.node_list, \ 92 node_list) 93 #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ 94 for (entry = (mm)->prev_scanned_node, \ 95 next = entry ? list_entry(entry->node_list.next, \ 96 struct drm_mm_node, node_list) : NULL; \ 97 entry != NULL; entry = next, \ 98 next = entry ? list_entry(entry->node_list.next, \ 99 struct drm_mm_node, node_list) : NULL) \ 100 /* 101 * Basic range manager support (drm_mm.c) 102 */ 103 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 104 unsigned long size, 105 unsigned alignment, 106 unsigned long color, 107 int atomic); 108 extern struct drm_mm_node *drm_mm_get_block_range_generic( 109 struct drm_mm_node *node, 110 unsigned long size, 111 unsigned alignment, 112 unsigned long color, 113 unsigned long start, 114 unsigned long end, 115 int atomic); 116 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 117 unsigned long size, 118 unsigned alignment) 119 { 120 return drm_mm_get_block_generic(parent, size, alignment, 0, 0); 121 } 122 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 123 unsigned long size, 124 unsigned alignment) 125 { 126 return drm_mm_get_block_generic(parent, size, alignment, 0, 1); 127 } 128 static inline struct drm_mm_node *drm_mm_get_block_range( 129 struct drm_mm_node *parent, 130 unsigned long size, 131 unsigned alignment, 132 unsigned long start, 133 unsigned long end) 134 { 135 return drm_mm_get_block_range_generic(parent, size, alignment, 0, 136 start, end, 0); 137 } 138 static inline struct drm_mm_node *drm_mm_get_color_block_range( 139 struct drm_mm_node *parent, 140 unsigned long size, 141 unsigned alignment, 142 unsigned long color, 143 unsigned long start, 144 unsigned long end) 145 { 146 return drm_mm_get_block_range_generic(parent, size, alignment, color, 147 start, end, 0); 148 } 149 static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 150 struct drm_mm_node *parent, 151 unsigned long size, 152 unsigned alignment, 153 unsigned long start, 154 unsigned long end) 155 { 156 return drm_mm_get_block_range_generic(parent, size, alignment, 0, 157 start, end, 1); 158 } 159 160 extern int drm_mm_insert_node(struct drm_mm *mm, 161 struct drm_mm_node *node, 162 unsigned long size, 163 unsigned alignment); 164 extern int drm_mm_insert_node_in_range(struct drm_mm *mm, 165 struct drm_mm_node *node, 166 unsigned long size, 167 unsigned alignment, 168 unsigned long start, 169 unsigned long end); 170 extern int drm_mm_insert_node_generic(struct drm_mm *mm, 171 struct drm_mm_node *node, 172 unsigned long size, 173 unsigned alignment, 174 unsigned long color); 175 extern int drm_mm_insert_node_in_range_generic(struct drm_mm *mm, 176 struct drm_mm_node *node, 177 unsigned long size, 178 unsigned alignment, 179 unsigned long color, 180 unsigned long start, 181 unsigned long end); 182 extern void drm_mm_put_block(struct drm_mm_node *cur); 183 extern void drm_mm_remove_node(struct drm_mm_node *node); 184 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); 185 extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm, 186 unsigned long size, 187 unsigned alignment, 188 unsigned long color, 189 bool best_match); 190 extern struct drm_mm_node *drm_mm_search_free_in_range_generic( 191 const struct drm_mm *mm, 192 unsigned long size, 193 unsigned alignment, 194 unsigned long color, 195 unsigned long start, 196 unsigned long end, 197 bool best_match); 198 static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 199 unsigned long size, 200 unsigned alignment, 201 bool best_match) 202 { 203 return drm_mm_search_free_generic(mm,size, alignment, 0, best_match); 204 } 205 static inline struct drm_mm_node *drm_mm_search_free_in_range( 206 const struct drm_mm *mm, 207 unsigned long size, 208 unsigned alignment, 209 unsigned long start, 210 unsigned long end, 211 bool best_match) 212 { 213 return drm_mm_search_free_in_range_generic(mm, size, alignment, 0, 214 start, end, best_match); 215 } 216 static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm, 217 unsigned long size, 218 unsigned alignment, 219 unsigned long color, 220 bool best_match) 221 { 222 return drm_mm_search_free_generic(mm,size, alignment, color, best_match); 223 } 224 static inline struct drm_mm_node *drm_mm_search_free_in_range_color( 225 const struct drm_mm *mm, 226 unsigned long size, 227 unsigned alignment, 228 unsigned long color, 229 unsigned long start, 230 unsigned long end, 231 bool best_match) 232 { 233 return drm_mm_search_free_in_range_generic(mm, size, alignment, color, 234 start, end, best_match); 235 } 236 extern int drm_mm_init(struct drm_mm *mm, 237 unsigned long start, 238 unsigned long size); 239 extern void drm_mm_takedown(struct drm_mm *mm); 240 extern int drm_mm_clean(struct drm_mm *mm); 241 extern int drm_mm_pre_get(struct drm_mm *mm); 242 243 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 244 { 245 return block->mm; 246 } 247 248 void drm_mm_init_scan(struct drm_mm *mm, 249 unsigned long size, 250 unsigned alignment, 251 unsigned long color); 252 void drm_mm_init_scan_with_range(struct drm_mm *mm, 253 unsigned long size, 254 unsigned alignment, 255 unsigned long color, 256 unsigned long start, 257 unsigned long end); 258 int drm_mm_scan_add_block(struct drm_mm_node *node); 259 int drm_mm_scan_remove_block(struct drm_mm_node *node); 260 261 extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 262 263 #endif 264