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 fl_entry; 46 struct list_head ml_entry; 47 int free; 48 unsigned long start; 49 unsigned long size; 50 struct drm_mm *mm; 51 void *private; 52 }; 53 54 struct drm_mm { 55 struct list_head fl_entry; 56 struct list_head ml_entry; 57 struct list_head unused_nodes; 58 int num_unused; 59 spinlock_t unused_lock; 60 }; 61 62 /* 63 * Basic range manager support (drm_mm.c) 64 */ 65 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 66 unsigned long size, 67 unsigned alignment, 68 int atomic); 69 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 70 unsigned long size, 71 unsigned alignment) 72 { 73 return drm_mm_get_block_generic(parent, size, alignment, 0); 74 } 75 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 76 unsigned long size, 77 unsigned alignment) 78 { 79 return drm_mm_get_block_generic(parent, size, alignment, 1); 80 } 81 extern void drm_mm_put_block(struct drm_mm_node *cur); 82 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 83 unsigned long size, 84 unsigned alignment, 85 int best_match); 86 extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 87 unsigned long size); 88 extern void drm_mm_takedown(struct drm_mm *mm); 89 extern int drm_mm_clean(struct drm_mm *mm); 90 extern unsigned long drm_mm_tail_space(struct drm_mm *mm); 91 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, 92 unsigned long size); 93 extern int drm_mm_add_space_to_tail(struct drm_mm *mm, 94 unsigned long size, int atomic); 95 extern int drm_mm_pre_get(struct drm_mm *mm); 96 97 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 98 { 99 return block->mm; 100 } 101 102 #ifdef CONFIG_DEBUG_FS 103 int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm); 104 #endif 105 106 #endif 107