[net-next-2.6.git] / include / drm / drm_mm.h

/**************************************************************************
 *
 * Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX. USA.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *
 **************************************************************************/
/*
 * Authors:
 * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
 */

#ifndef _DRM_MM_H_
#define _DRM_MM_H_

/*
 * Generic range manager structs
 */
#include <linux/list.h>
#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>
#endif

struct drm_mm_node {
	struct list_head fl_entry;
	struct list_head ml_entry;
	int free;
	unsigned long start;
	unsigned long size;
	struct drm_mm *mm;
	void *private;
};

struct drm_mm {
	struct list_head fl_entry;
	struct list_head ml_entry;
	struct list_head unused_nodes;
	int num_unused;
	spinlock_t unused_lock;
};

/*
 * Basic range manager support (drm_mm.c)
 */
extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,
						    unsigned long size,
						    unsigned alignment,
						    int atomic);
extern struct drm_mm_node *drm_mm_get_block_range_generic(
						struct drm_mm_node *node,
						unsigned long size,
						unsigned alignment,
						unsigned long start,
						unsigned long end,
						int atomic);
static inline struct drm_mm_node *drm_mm_get_block(struct drm_mm_node *parent,
						   unsigned long size,
						   unsigned alignment)
{
	return drm_mm_get_block_generic(parent, size, alignment, 0);
}
static inline struct drm_mm_node *drm_mm_get_block_atomic(struct drm_mm_node *parent,
							  unsigned long size,
							  unsigned alignment)
{
	return drm_mm_get_block_generic(parent, size, alignment, 1);
}
static inline struct drm_mm_node *drm_mm_get_block_range(
						struct drm_mm_node *parent,
						unsigned long size,
						unsigned alignment,
						unsigned long start,
						unsigned long end)
{
	return drm_mm_get_block_range_generic(parent, size, alignment,
						start, end, 0);
}
static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
						struct drm_mm_node *parent,
						unsigned long size,
						unsigned alignment,
						unsigned long start,
						unsigned long end)
{
	return drm_mm_get_block_range_generic(parent, size, alignment,
						start, end, 1);
}
extern void drm_mm_put_block(struct drm_mm_node *cur);
extern struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,
					      unsigned long size,
					      unsigned alignment,
					      int best_match);
extern struct drm_mm_node *drm_mm_search_free_in_range(
						const struct drm_mm *mm,
						unsigned long size,
						unsigned alignment,
						unsigned long start,
						unsigned long end,
						int best_match);
extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
		       unsigned long size);
extern void drm_mm_takedown(struct drm_mm *mm);
extern int drm_mm_clean(struct drm_mm *mm);
extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
					 unsigned long size);
extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
				    unsigned long size, int atomic);
extern int drm_mm_pre_get(struct drm_mm *mm);

static inline struct drm_mm *drm_get_mm(struct drm_mm_node *block)
{
	return block->mm;
}

#ifdef CONFIG_DEBUG_FS
int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);
#endif

#endif
Commit	Line	Data
249d6048 JG	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>
f1938cd6 DA	40	#ifdef CONFIG_DEBUG_FS
	41	#include <linux/seq_file.h>
	42	#endif
249d6048 JG	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	*/
89579f77 TH	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);
a2e68e92 JG	69	extern struct drm_mm_node *drm_mm_get_block_range_generic(
	70	struct drm_mm_node *node,
	71	unsigned long size,
	72	unsigned alignment,
	73	unsigned long start,
	74	unsigned long end,
	75	int atomic);
89579f77	76	static inline struct drm_mm_node drm_mm_get_block(struct drm_mm_node parent,
249d6048	77	unsigned long size,
89579f77 TH	78	unsigned alignment)
	79	{
	80	return drm_mm_get_block_generic(parent, size, alignment, 0);
	81	}
	82	static inline struct drm_mm_node drm_mm_get_block_atomic(struct drm_mm_node parent,
	83	unsigned long size,
	84	unsigned alignment)
	85	{
	86	return drm_mm_get_block_generic(parent, size, alignment, 1);
	87	}
a2e68e92 JG	88	static inline struct drm_mm_node *drm_mm_get_block_range(
	89	struct drm_mm_node *parent,
	90	unsigned long size,
	91	unsigned alignment,
	92	unsigned long start,
	93	unsigned long end)
	94	{
	95	return drm_mm_get_block_range_generic(parent, size, alignment,
	96	start, end, 0);
	97	}
	98	static inline struct drm_mm_node *drm_mm_get_block_atomic_range(
	99	struct drm_mm_node *parent,
	100	unsigned long size,
	101	unsigned alignment,
	102	unsigned long start,
	103	unsigned long end)
	104	{
	105	return drm_mm_get_block_range_generic(parent, size, alignment,
	106	start, end, 1);
	107	}
249d6048 JG	108	extern void drm_mm_put_block(struct drm_mm_node *cur);
	109	extern struct drm_mm_node drm_mm_search_free(const struct drm_mm mm,
	110	unsigned long size,
	111	unsigned alignment,
	112	int best_match);
a2e68e92 JG	113	extern struct drm_mm_node *drm_mm_search_free_in_range(
	114	const struct drm_mm *mm,
	115	unsigned long size,
	116	unsigned alignment,
	117	unsigned long start,
	118	unsigned long end,
	119	int best_match);
249d6048 JG	120	extern int drm_mm_init(struct drm_mm *mm, unsigned long start,
	121	unsigned long size);
	122	extern void drm_mm_takedown(struct drm_mm *mm);
	123	extern int drm_mm_clean(struct drm_mm *mm);
	124	extern unsigned long drm_mm_tail_space(struct drm_mm *mm);
	125	extern int drm_mm_remove_space_from_tail(struct drm_mm *mm,
	126	unsigned long size);
	127	extern int drm_mm_add_space_to_tail(struct drm_mm *mm,
	128	unsigned long size, int atomic);
	129	extern int drm_mm_pre_get(struct drm_mm *mm);
	130
	131	static inline struct drm_mm drm_get_mm(struct drm_mm_node block)
	132	{
	133	return block->mm;
	134	}
	135
fa8a1238 DA	136	#ifdef CONFIG_DEBUG_FS
	137	int drm_mm_dump_table(struct seq_file m, struct drm_mm mm);
	138	#endif
	139
249d6048	140	#endif