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 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 /* 33 * Authors: 34 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> 35 */ 36 37 #ifndef _DRM_MM_H_ 38 #define _DRM_MM_H_ 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 start; 52 unsigned long size; 53 struct drm_mm *mm; 54 void *private; 55 }; 56 57 struct drm_mm { 58 struct list_head hole_stack; 59 struct drm_mm_node head_node; 60 struct list_head unused_nodes; 61 int num_unused; 62 struct mtx unused_lock; 63 unsigned int scan_check_range : 1; 64 unsigned scan_alignment; 65 unsigned long scan_size; 66 unsigned long scan_hit_start; 67 unsigned scan_hit_size; 68 unsigned scanned_blocks; 69 unsigned long scan_start; 70 unsigned long scan_end; 71 struct drm_mm_node *prev_scanned_node; 72 }; 73 74 static inline bool drm_mm_node_allocated(struct drm_mm_node *node) 75 { 76 return node->allocated; 77 } 78 79 static inline bool drm_mm_initialized(struct drm_mm *mm) 80 { 81 return (mm->hole_stack.next != NULL); 82 } 83 #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ 84 &(mm)->head_node.node_list, \ 85 node_list) 86 #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ 87 for (entry = (mm)->prev_scanned_node, \ 88 next = entry ? list_entry(entry->node_list.next, \ 89 struct drm_mm_node, node_list) : NULL; \ 90 entry != NULL; entry = next, \ 91 next = entry ? list_entry(entry->node_list.next, \ 92 struct drm_mm_node, node_list) : NULL) 93 94 /* 95 * Basic range manager support (drm_mm.c) 96 */ 97 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 98 unsigned long size, 99 unsigned alignment, 100 int atomic); 101 extern struct drm_mm_node *drm_mm_get_block_range_generic( 102 struct drm_mm_node *node, 103 unsigned long size, 104 unsigned alignment, 105 unsigned long start, 106 unsigned long end, 107 int atomic); 108 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 109 unsigned long size, 110 unsigned alignment) 111 { 112 return drm_mm_get_block_generic(parent, size, alignment, 0); 113 } 114 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 115 unsigned long size, 116 unsigned alignment) 117 { 118 return drm_mm_get_block_generic(parent, size, alignment, 1); 119 } 120 static inline struct drm_mm_node *drm_mm_get_block_range( 121 struct drm_mm_node *parent, 122 unsigned long size, 123 unsigned alignment, 124 unsigned long start, 125 unsigned long end) 126 { 127 return drm_mm_get_block_range_generic(parent, size, alignment, 128 start, end, 0); 129 } 130 static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 131 struct drm_mm_node *parent, 132 unsigned long size, 133 unsigned alignment, 134 unsigned long start, 135 unsigned long end) 136 { 137 return drm_mm_get_block_range_generic(parent, size, alignment, 138 start, end, 1); 139 } 140 extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node, 141 unsigned long size, unsigned alignment); 142 extern int drm_mm_insert_node_in_range(struct drm_mm *mm, 143 struct drm_mm_node *node, 144 unsigned long size, unsigned alignment, 145 unsigned long start, unsigned long end); 146 extern void drm_mm_put_block(struct drm_mm_node *cur); 147 extern void drm_mm_remove_node(struct drm_mm_node *node); 148 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); 149 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 150 unsigned long size, 151 unsigned alignment, 152 int best_match); 153 extern struct drm_mm_node *drm_mm_search_free_in_range( 154 const struct drm_mm *mm, 155 unsigned long size, 156 unsigned alignment, 157 unsigned long start, 158 unsigned long end, 159 int best_match); 160 extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 161 unsigned long size); 162 extern void drm_mm_takedown(struct drm_mm *mm); 163 extern int drm_mm_clean(struct drm_mm *mm); 164 extern unsigned long drm_mm_tail_space(struct drm_mm *mm); 165 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, 166 unsigned long size); 167 extern int drm_mm_add_space_to_tail(struct drm_mm *mm, 168 unsigned long size, int atomic); 169 extern int drm_mm_pre_get(struct drm_mm *mm); 170 171 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 172 { 173 return block->mm; 174 } 175 176 void drm_mm_init_scan(struct drm_mm *mm, unsigned long size, 177 unsigned alignment); 178 void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size, 179 unsigned alignment, 180 unsigned long start, 181 unsigned long end); 182 int drm_mm_scan_add_block(struct drm_mm_node *node); 183 int drm_mm_scan_remove_block(struct drm_mm_node *node); 184 185 void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 186 187 #endif 188