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Diffstat (limited to '')
| -rw-r--r-- | intel/mm.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/intel/mm.h b/intel/mm.h new file mode 100644 index 0000000..be3d90d --- /dev/null +++ b/intel/mm.h @@ -0,0 +1,80 @@ +/* + * 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 |