Home | History | Annotate | Line # | Download | only in bsd-core 
      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 
     39 struct 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 
     49 struct 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  */
     60 extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
     61 						    unsigned long size,
     62 						    unsigned alignment,
     63 						    int atomic);
     64 static 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 }
     70 static 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 }
     76 extern void drm_mm_put_block(struct drm_mm_node *cur);
     77 extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
     78 					      unsigned long size,
     79 					      unsigned alignment,
     80 					      int best_match);
     81 extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
     82 		       unsigned long size);
     83 extern void drm_mm_takedown(struct drm_mm *mm);
     84 extern int drm_mm_clean(struct drm_mm *mm);
     85 extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
     86 extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
     87 					 unsigned long size);
     88 extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
     89 				    unsigned long size, int atomic);
     90 extern int drm_mm_pre_get(struct drm_mm *mm);
     91 
     92 static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
     93 {
     94 	return block->mm;
     95 }
     96 
     97 #endif
     98