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 41 struct drm_mm_node { 42 struct list_head fl_entry; 43 struct list_head ml_entry; 44 int free; 45 unsigned long start; 46 unsigned long size; 47 struct drm_mm *mm; 48 void *private; 49 }; 50 51 struct drm_mm { 52 struct list_head fl_entry; 53 struct list_head ml_entry; 54 struct list_head unused_nodes; 55 int num_unused; 56 spinlock_t unused_lock; 57 }; 58 59 /* 60 * Basic range manager support (drm_mm.c) 61 */ 62 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 63 unsigned long size, 64 unsigned alignment, 65 int atomic); 66 static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 67 unsigned long size, 68 unsigned alignment) 69 { 70 return drm_mm_get_block_generic(parent, size, alignment, 0); 71 } 72 static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 73 unsigned long size, 74 unsigned alignment) 75 { 76 return drm_mm_get_block_generic(parent, size, alignment, 1); 77 } 78 extern void drm_mm_put_block(struct drm_mm_node *cur); 79 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 80 unsigned long size, 81 unsigned alignment, 82 int best_match); 83 extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 84 unsigned long size); 85 extern void drm_mm_takedown(struct drm_mm *mm); 86 extern int drm_mm_clean(struct drm_mm *mm); 87 extern unsigned long drm_mm_tail_space(struct drm_mm *mm); 88 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, 89 unsigned long size); 90 extern int drm_mm_add_space_to_tail(struct drm_mm *mm, 91 unsigned long size, int atomic); 92 extern int drm_mm_pre_get(struct drm_mm *mm); 93 94 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 95 { 96 return block->mm; 97 } 98 99 #endif 100