/*

 * GLX Hardware Device Driver common code

 * Copyright (C) 1999 Wittawat Yamwong

 *

 * 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, sublicense,

 * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL

 * KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS 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.

 */

/**

 * Memory manager code.  Primarily used by device drivers to manage texture

 * heaps, etc.

 */

#ifndef MM_H

#define MM_H

#include "libdrm_macros.h"

struct mem_block {

	struct mem_block *next, *prev;

	struct mem_block *next_free, *prev_free;

	struct mem_block *heap;

	int ofs, size;

	unsigned int free:1;

	unsigned int reserved:1;

};

/** 

 * input: total size in bytes

 * return: a heap pointer if OK, NULL if error

 */

drm_private extern struct mem_block *mmInit(int ofs, int size);

/**

 * Allocate 'size' bytes with 2^align2 bytes alignment,

 * restrict the search to free memory after 'startSearch'

 * depth and back buffers should be in different 4mb banks

 * to get better page hits if possible

 * input:	size = size of block

 *       	align2 = 2^align2 bytes alignment

 *		startSearch = linear offset from start of heap to begin search

 * return: pointer to the allocated block, 0 if error

 */

drm_private extern struct mem_block *mmAllocMem(struct mem_block *heap,

						int size, int align2,

						int startSearch);

/**

 * Free block starts at offset

 * input: pointer to a block

 * return: 0 if OK, -1 if error

 */

drm_private extern int mmFreeMem(struct mem_block *b);

/**

 * destroy MM

 */

drm_private extern void mmDestroy(struct mem_block *mmInit);

/**

 * For debugging purpose.

 */

drm_private extern void mmDumpMemInfo(const struct mem_block *mmInit);

#endif