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