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/* 30 * Authors: 31 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> 32 */ 33 34#ifndef _DRM_MM_H_ 35#define _DRM_MM_H_ 36 37#include "drm_linux_list.h" 38 39struct drm_mm_node { 40 struct list_head fl_entry; 41 struct list_head ml_entry; 42 int free; 43 unsigned long start; 44 unsigned long size; 45 struct drm_mm *mm; 46 void *private; 47}; 48 49struct drm_mm { 50 struct list_head fl_entry; 51 struct list_head ml_entry; 52 struct list_head unused_nodes; 53 int num_unused; 54 kmutex_t unused_lock; 55}; 56 57/* 58 * Basic range manager support (drm_mm.c) 59 */ 60extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node, 61 unsigned long size, 62 unsigned alignment, 63 int atomic); 64static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent, 65 unsigned long size, 66 unsigned alignment) 67{ 68 return drm_mm_get_block_generic(parent, size, alignment, 0); 69} 70static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent, 71 unsigned long size, 72 unsigned alignment) 73{ 74 return drm_mm_get_block_generic(parent, size, alignment, 1); 75} 76extern void drm_mm_put_block(struct drm_mm_node *cur); 77extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm, 78 unsigned long size, 79 unsigned alignment, 80 int best_match); 81extern int drm_mm_init(struct drm_mm *mm, unsigned long start, 82 unsigned long size); 83extern void drm_mm_takedown(struct drm_mm *mm); 84extern int drm_mm_clean(struct drm_mm *mm); 85extern unsigned long drm_mm_tail_space(struct drm_mm *mm); 86extern int drm_mm_remove_space_from_tail(struct drm_mm *mm, 87 unsigned long size); 88extern int drm_mm_add_space_to_tail(struct drm_mm *mm, 89 unsigned long size, int atomic); 90extern int drm_mm_pre_get(struct drm_mm *mm); 91 92static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block) 93{ 94 return block->mm; 95} 96 97#endif 98