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 struct mem_block { 33 struct mem_block *next, *prev; 34 struct mem_block *next_free, *prev_free; 35 struct mem_block *heap; 36 int ofs, size; 37 unsigned int free:1; 38 unsigned int reserved:1; 39 }; 40 41 /* Rename the variables in the drm copy of this code so that it doesn't 42 * conflict with mesa or whoever else has copied it around. 43 */ 44 #define mmInit drm_mmInit 45 #define mmAllocMem drm_mmAllocMem 46 #define mmFreeMem drm_mmFreeMem 47 #define mmFindBlock drm_mmFindBlock 48 #define mmDestroy drm_mmDestroy 49 #define mmDumpMemInfo drm_mmDumpMemInfo 50 51 /** 52 * input: total size in bytes 53 * return: a heap pointer if OK, NULL if error 54 */ 55 extern struct mem_block *mmInit(int ofs, int size); 56 57 /** 58 * Allocate 'size' bytes with 2^align2 bytes alignment, 59 * restrict the search to free memory after 'startSearch' 60 * depth and back buffers should be in different 4mb banks 61 * to get better page hits if possible 62 * input: size = size of block 63 * align2 = 2^align2 bytes alignment 64 * startSearch = linear offset from start of heap to begin search 65 * return: pointer to the allocated block, 0 if error 66 */ 67 extern struct mem_block *mmAllocMem(struct mem_block *heap, int size, 68 int align2, int startSearch); 69 70 /** 71 * Free block starts at offset 72 * input: pointer to a block 73 * return: 0 if OK, -1 if error 74 */ 75 extern int mmFreeMem(struct mem_block *b); 76 77 /** 78 * Free block starts at offset 79 * input: pointer to a heap, start offset 80 * return: pointer to a block 81 */ 82 extern struct mem_block *mmFindBlock(struct mem_block *heap, int start); 83 84 /** 85 * destroy MM 86 */ 87 extern void mmDestroy(struct mem_block *mmInit); 88 89 /** 90 * For debuging purpose. 91 */ 92 extern void mmDumpMemInfo(const struct mem_block *mmInit); 93 94 #endif 95