IABSD.fr/xenocara/lib/libdrm/intel/mm.h

Branch : - branch - master - tag -

• Show log

  Commit

• Author : jsg
  Date : 2018-09-13 12:02:27
  Hash : d4accf84
  Message : Merge libdrm 2.4.94

• lib/libdrm/intel/mm.h

• /*
   * 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 debuging purpose.
   */
  drm_private extern void mmDumpMemInfo(const struct mem_block *mmInit);
  
  #endif