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 * $FreeBSD: head/sys/dev/drm2/drm_mm.h 247833 2013-03-05 09:07:58Z kib $ 28 **************************************************************************/ 29 30 /* 31 * Authors: 32 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> 33 */ 34 35 #ifndef _DRM_MM_H_ 36 #define _DRM_MM_H_ 37 38 #include <stdbool.h> 39 #include <linux/list.h> 40 41 struct drm_mm_node { 42 struct list_head node_list; 43 struct list_head hole_stack; 44 unsigned hole_follows : 1; 45 unsigned scanned_block : 1; 46 unsigned scanned_prev_free : 1; 47 unsigned scanned_next_free : 1; 48 unsigned scanned_preceeds_hole : 1; 49 unsigned allocated : 1; 50 unsigned long start; 51 unsigned long size; 52 struct drm_mm *mm; 53 void *private; 54 }; 55 56 struct drm_mm { 57 struct list_head hole_stack; 58 struct drm_mm_node head_node; 59 struct list_head unused_nodes; 60 int num_unused; 61 struct spinlock unused_spin; 62 unsigned int scan_check_range : 1; 63 unsigned scan_alignment; 64 unsigned long scan_size; 65 unsigned long scan_hit_start; 66 unsigned scan_hit_size; 67 unsigned scanned_blocks; 68 unsigned long scan_start; 69 unsigned long scan_end; 70 struct drm_mm_node *prev_scanned_node; 71 }; 72 73 static inline bool drm_mm_node_allocated(struct drm_mm_node *node) 74 { 75 return node->allocated; 76 } 77 78 static inline bool drm_mm_initialized(struct drm_mm *mm) 79 { 80 return (mm->hole_stack.next != NULL); 81 } 82 #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ 83 &(mm)->head_node.node_list, \ 84 node_list) 85 #define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ 86 for (entry = (mm)->prev_scanned_node, \ 87 next = entry ? list_entry(entry->node_list.next, \ 88 struct drm_mm_node, node_list) : NULL; \ 89 entry != NULL; entry = next, \ 90 next = entry ? list_entry(entry->node_list.next, \ 91 struct drm_mm_node, node_list) : NULL) 92 93 /* 94 * Basic range manager support (drm_mm.c) 95 */ 96 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 97 unsigned long size, 98 unsigned alignment, 99 int atomic); 100 extern struct drm_mm_node *drm_mm_get_block_range_generic( 101 struct drm_mm_node *node, 102 unsigned long size, 103 unsigned alignment, 104 unsigned long start, 105 unsigned long end, 106 int atomic); 107 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 108 unsigned long size, 109 unsigned alignment) 110 { 111 return drm_mm_get_block_generic(parent, size, alignment, 0); 112 } 113 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 114 unsigned long size, 115 unsigned alignment) 116 { 117 return drm_mm_get_block_generic(parent, size, alignment, 1); 118 } 119 static inline struct drm_mm_node *drm_mm_get_block_range( 120 struct drm_mm_node *parent, 121 unsigned long size, 122 unsigned alignment, 123 unsigned long start, 124 unsigned long end) 125 { 126 return drm_mm_get_block_range_generic(parent, size, alignment, 127 start, end, 0); 128 } 129 static inline struct drm_mm_node *drm_mm_get_block_atomic_range( 130 struct drm_mm_node *parent, 131 unsigned long size, 132 unsigned alignment, 133 unsigned long start, 134 unsigned long end) 135 { 136 return drm_mm_get_block_range_generic(parent, size, alignment, 137 start, end, 1); 138 } 139 extern int drm_mm_insert_node(struct drm_mm *mm, struct drm_mm_node *node, 140 unsigned long size, unsigned alignment); 141 extern int drm_mm_insert_node_in_range(struct drm_mm *mm, 142 struct drm_mm_node *node, 143 unsigned long size, unsigned alignment, 144 unsigned long start, unsigned long end); 145 extern void drm_mm_put_block(struct drm_mm_node *cur); 146 extern void drm_mm_remove_node(struct drm_mm_node *node); 147 extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new); 148 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 149 unsigned long size, 150 unsigned alignment, 151 int best_match); 152 extern struct drm_mm_node *drm_mm_search_free_in_range( 153 const struct drm_mm *mm, 154 unsigned long size, 155 unsigned alignment, 156 unsigned long start, 157 unsigned long end, 158 int best_match); 159 extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 160 unsigned long size); 161 extern void drm_mm_takedown(struct drm_mm *mm); 162 extern int drm_mm_clean(struct drm_mm *mm); 163 extern unsigned long drm_mm_tail_space(struct drm_mm *mm); 164 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, 165 unsigned long size); 166 extern int drm_mm_add_space_to_tail(struct drm_mm *mm, 167 unsigned long size, int atomic); 168 extern int drm_mm_pre_get(struct drm_mm *mm); 169 170 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 171 { 172 return block->mm; 173 } 174 175 void drm_mm_init_scan(struct drm_mm *mm, unsigned long size, 176 unsigned alignment); 177 void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size, 178 unsigned alignment, 179 unsigned long start, 180 unsigned long end); 181 int drm_mm_scan_add_block(struct drm_mm_node *node); 182 int drm_mm_scan_remove_block(struct drm_mm_node *node); 183 184 void drm_mm_debug_table(struct drm_mm *mm, const char *prefix); 185 186 #endif 187