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89edce0b SR |
1 | #ifndef _ASM_POWERPC_SCATTERLIST_H |
2 | #define _ASM_POWERPC_SCATTERLIST_H | |
1da177e4 LT |
3 | /* |
4 | * Copyright (C) 2001 PPC64 Team, IBM Corp | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
89edce0b | 12 | #ifdef __KERNEL__ |
1da177e4 LT |
13 | #include <linux/types.h> |
14 | #include <asm/dma.h> | |
15 | ||
16 | struct scatterlist { | |
d6ec0842 JA |
17 | #ifdef CONFIG_DEBUG_SG |
18 | unsigned long sg_magic; | |
19 | #endif | |
18dabf47 | 20 | unsigned long page_link; |
1da177e4 LT |
21 | unsigned int offset; |
22 | unsigned int length; | |
23 | ||
24 | /* For TCE support */ | |
8168f902 | 25 | dma_addr_t dma_address; |
1da177e4 LT |
26 | u32 dma_length; |
27 | }; | |
28 | ||
89edce0b SR |
29 | /* |
30 | * These macros should be used after a dma_map_sg call has been done | |
31 | * to get bus addresses of each of the SG entries and their lengths. | |
32 | * You should only work with the number of sg entries pci_map_sg | |
33 | * returns, or alternatively stop on the first sg_dma_len(sg) which | |
34 | * is 0. | |
35 | */ | |
1da177e4 | 36 | #define sg_dma_address(sg) ((sg)->dma_address) |
89edce0b | 37 | #ifdef __powerpc64__ |
1da177e4 | 38 | #define sg_dma_len(sg) ((sg)->dma_length) |
89edce0b SR |
39 | #else |
40 | #define sg_dma_len(sg) ((sg)->length) | |
41 | #endif | |
1da177e4 | 42 | |
89edce0b | 43 | #ifdef __powerpc64__ |
1da177e4 | 44 | #define ISA_DMA_THRESHOLD (~0UL) |
89edce0b | 45 | #endif |
1da177e4 | 46 | |
78bdc310 JA |
47 | #define ARCH_HAS_SG_CHAIN |
48 | ||
89edce0b SR |
49 | #endif /* __KERNEL__ */ |
50 | #endif /* _ASM_POWERPC_SCATTERLIST_H */ |