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/**************************************************************************

 *

 * 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 

 */

#ifndef _DRM_MM_H_

#define _DRM_MM_H_

/*

 * Generic range manager structs

 */

#include 

#ifdef CONFIG_DEBUG_FS

#include 

#endif

struct drm_mm_node {

	struct list_head node_list;

	struct list_head hole_stack;

	unsigned hole_follows : 1;

	unsigned scanned_block : 1;

	unsigned scanned_prev_free : 1;

	unsigned scanned_next_free : 1;

	unsigned scanned_preceeds_hole : 1;

	unsigned allocated : 1;

	unsigned long color;

	unsigned long start;

	unsigned long size;

	struct drm_mm *mm;

};

struct drm_mm {

	/* List of all memory nodes that immediately precede a free hole. */

	struct list_head hole_stack;

	/* head_node.node_list is the list of all memory nodes, ordered

	 * according to the (increasing) start address of the memory node. */

	struct drm_mm_node head_node;

	struct list_head unused_nodes;

	int num_unused;

	spinlock_t unused_lock;

	unsigned int scan_check_range : 1;

	unsigned scan_alignment;

	unsigned long scan_color;

	unsigned long scan_size;

	unsigned long scan_hit_start;

	unsigned long scan_hit_end;

	unsigned scanned_blocks;

	unsigned long scan_start;

	unsigned long scan_end;

	struct drm_mm_node *prev_scanned_node;

	void (*color_adjust)(struct drm_mm_node *node, unsigned long color,

			     unsigned long *start, unsigned long *end);

};

static inline bool drm_mm_node_allocated(struct drm_mm_node *node)

{

	return node->allocated;

}

static inline bool drm_mm_initialized(struct drm_mm *mm)

{

	return mm->hole_stack.next;

}

static inline unsigned long __drm_mm_hole_node_start(struct drm_mm_node *hole_node)

{

	return hole_node->start + hole_node->size;

}

static inline unsigned long drm_mm_hole_node_start(struct drm_mm_node *hole_node)

{

	BUG_ON(!hole_node->hole_follows);

	return __drm_mm_hole_node_start(hole_node);

}

static inline unsigned long __drm_mm_hole_node_end(struct drm_mm_node *hole_node)

{

	return list_entry(hole_node->node_list.next,

			  struct drm_mm_node, node_list)->start;

}

static inline unsigned long drm_mm_hole_node_end(struct drm_mm_node *hole_node)

{

	return __drm_mm_hole_node_end(hole_node);

}

#define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \

						&(mm)->head_node.node_list, \

						node_list)

#define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \

	for (entry = (mm)->prev_scanned_node, \

		next = entry ? list_entry(entry->node_list.next, \

			struct drm_mm_node, node_list) : NULL; \

	     entry != NULL; entry = next, \

		next = entry ? list_entry(entry->node_list.next, \

			struct drm_mm_node, node_list) : NULL) \

/* Note that we need to unroll list_for_each_entry in order to inline

 * setting hole_start and hole_end on each iteration and keep the

 * macro sane.

 */

#define drm_mm_for_each_hole(entry, mm, hole_start, hole_end) \

	for (entry = list_entry((mm)->hole_stack.next, struct drm_mm_node, hole_stack); \

	     &entry->hole_stack != &(mm)->hole_stack ? \

	     hole_start = drm_mm_hole_node_start(entry), \

	     hole_end = drm_mm_hole_node_end(entry), \

	     1 : 0; \

	     entry = list_entry(entry->hole_stack.next, struct drm_mm_node, hole_stack))

/*

 * Basic range manager support (drm_mm.c)

 */

extern struct drm_mm_node *drm_mm_create_block(struct drm_mm *mm,

					       unsigned long start,

					       unsigned long size,

					       bool atomic);

extern struct drm_mm_node *drm_mm_get_block_generic(struct drm_mm_node *node,

						    unsigned long size,

						    unsigned alignment,

						    unsigned long color,

						    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 color,

						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, 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, 0, 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, 0,

					      start, end, 0);

}

static inline struct drm_mm_node *drm_mm_get_color_block_range(

						struct drm_mm_node *parent,

						unsigned long size,

						unsigned alignment,

						unsigned long color,

						unsigned long start,

						unsigned long end)

{

	return drm_mm_get_block_range_generic(parent, size, alignment, color,

						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, 0,

						start, end, 1);

}

extern int drm_mm_insert_node(struct drm_mm *mm,

			      struct drm_mm_node *node,

			      unsigned long size,

			      unsigned alignment);

extern int drm_mm_insert_node_in_range(struct drm_mm *mm,

				       struct drm_mm_node *node,

				       unsigned long size,

				       unsigned alignment,

				       unsigned long start,

				       unsigned long end);

extern int drm_mm_insert_node_generic(struct drm_mm *mm,

				      struct drm_mm_node *node,

				      unsigned long size,

				      unsigned alignment,

				      unsigned long color);

extern int drm_mm_insert_node_in_range_generic(struct drm_mm *mm,

				       struct drm_mm_node *node,

				       unsigned long size,

				       unsigned alignment,

				       unsigned long color,

				       unsigned long start,

				       unsigned long end);

extern void drm_mm_put_block(struct drm_mm_node *cur);

extern void drm_mm_remove_node(struct drm_mm_node *node);

extern void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new);

extern struct drm_mm_node *drm_mm_search_free_generic(const struct drm_mm *mm,

					      unsigned long size,

					      unsigned alignment,

						      unsigned long color,

						      bool best_match);

extern struct drm_mm_node *drm_mm_search_free_in_range_generic(

						const struct drm_mm *mm,

						unsigned long size,

						unsigned alignment,

						unsigned long color,

						unsigned long start,

						unsigned long end,

						bool best_match);

static inline struct drm_mm_node *drm_mm_search_free(const struct drm_mm *mm,

						     unsigned long size,

						     unsigned alignment,

						     bool best_match)

{

	return drm_mm_search_free_generic(mm,size, alignment, 0, best_match);

}

static inline  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,

						bool best_match)

{

	return drm_mm_search_free_in_range_generic(mm, size, alignment, 0,

						   start, end, best_match);

}

static inline struct drm_mm_node *drm_mm_search_free_color(const struct drm_mm *mm,

							   unsigned long size,

							   unsigned alignment,

							   unsigned long color,

							   bool best_match)

{

	return drm_mm_search_free_generic(mm,size, alignment, color, best_match);

}

static inline  struct drm_mm_node *drm_mm_search_free_in_range_color(

						const struct drm_mm *mm,

						unsigned long size,

						unsigned alignment,

						unsigned long color,

						unsigned long start,

						unsigned long end,

						bool best_match)

{

	return drm_mm_search_free_in_range_generic(mm, size, alignment, color,

						   start, end, 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 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;

}

void drm_mm_init_scan(struct drm_mm *mm,

		      unsigned long size,

				 unsigned alignment,

		      unsigned long color);

void drm_mm_init_scan_with_range(struct drm_mm *mm,

				 unsigned long size,

				 unsigned alignment,

				 unsigned long color,

				 unsigned long start,

				 unsigned long end);

int drm_mm_scan_add_block(struct drm_mm_node *node);

int drm_mm_scan_remove_block(struct drm_mm_node *node);

extern void drm_mm_debug_table(struct drm_mm *mm, const char *prefix);

#ifdef CONFIG_DEBUG_FS

int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm);

#endif

#endif