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 * Memory manager code. Primarily used by device drivers to manage texture 26 * heaps, etc. 27 */ 28 29 #ifndef MM_H 30 #define MM_H 31 32 #ifdef HAVE_CONFIG_H 33 #include "config.h" 34 #endif 35 36 #include "libdrm_macros.h" 37 38 struct mem_block { 39 struct mem_block *next, *prev; 40 struct mem_block *next_free, *prev_free; 41 struct mem_block *heap; 42 int ofs, size; 43 unsigned int free:1; 44 unsigned int reserved:1; 45 }; 46 47 /** 48 * input: total size in bytes 49 * return: a heap pointer if OK, NULL if error 50 */ 51 drm_private extern struct mem_block *mmInit(int ofs, int size); 52 53 /** 54 * Allocate 'size' bytes with 2^align2 bytes alignment, 55 * restrict the search to free memory after 'startSearch' 56 * depth and back buffers should be in different 4mb banks 57 * to get better page hits if possible 58 * input: size = size of block 59 * align2 = 2^align2 bytes alignment 60 * startSearch = linear offset from start of heap to begin search 61 * return: pointer to the allocated block, 0 if error 62 */ 63 drm_private extern struct mem_block *mmAllocMem(struct mem_block *heap, 64 int size, int align2, 65 int startSearch); 66 67 /** 68 * Free block starts at offset 69 * input: pointer to a block 70 * return: 0 if OK, -1 if error 71 */ 72 drm_private extern int mmFreeMem(struct mem_block *b); 73 74 /** 75 * destroy MM 76 */ 77 drm_private extern void mmDestroy(struct mem_block *mmInit); 78 79 /** 80 * For debuging purpose. 81 */ 82 drm_private extern void mmDumpMemInfo(const struct mem_block *mmInit); 83 84 #endif 85
