1/* 2 * GLX Hardware Device Driver common code 3 * Copyright (C) 1999 Wittawat Yamwong 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included 13 * in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 21 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 22 */ 23 24 25/** 26 * Memory manager code. Primarily used by device drivers to manage texture 27 * heaps, etc. 28 */ 29 30 31#ifndef MM_H 32#define MM_H 33 34struct mem_block { 35 struct mem_block *next, *prev; 36 struct mem_block *next_free, *prev_free; 37 struct mem_block *heap; 38 int ofs,size; 39 unsigned int free:1; 40 unsigned int reserved:1; 41}; 42 43/* Rename the variables in the drm copy of this code so that it doesn't 44 * conflict with mesa or whoever else has copied it around. 45 */ 46#define mmInit drm_mmInit 47#define mmAllocMem drm_mmAllocMem 48#define mmFreeMem drm_mmFreeMem 49#define mmFindBlock drm_mmFindBlock 50#define mmDestroy drm_mmDestroy 51#define mmDumpMemInfo drm_mmDumpMemInfo 52 53/** 54 * input: total size in bytes 55 * return: a heap pointer if OK, NULL if error 56 */ 57extern struct mem_block *mmInit(int ofs, int size); 58 59/** 60 * Allocate 'size' bytes with 2^align2 bytes alignment, 61 * restrict the search to free memory after 'startSearch' 62 * depth and back buffers should be in different 4mb banks 63 * to get better page hits if possible 64 * input: size = size of block 65 * align2 = 2^align2 bytes alignment 66 * startSearch = linear offset from start of heap to begin search 67 * return: pointer to the allocated block, 0 if error 68 */ 69extern struct mem_block *mmAllocMem(struct mem_block *heap, int size, 70 int align2, int startSearch); 71 72/** 73 * Free block starts at offset 74 * input: pointer to a block 75 * return: 0 if OK, -1 if error 76 */ 77extern int mmFreeMem(struct mem_block *b); 78 79/** 80 * Free block starts at offset 81 * input: pointer to a heap, start offset 82 * return: pointer to a block 83 */ 84extern struct mem_block *mmFindBlock(struct mem_block *heap, int start); 85 86/** 87 * destroy MM 88 */ 89extern void mmDestroy(struct mem_block *mmInit); 90 91/** 92 * For debuging purpose. 93 */ 94extern void mmDumpMemInfo(const struct mem_block *mmInit); 95 96#endif 97