projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 2138422b | 24 | /* For TCE or SWIOTLB 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 LT |
36 | #define sg_dma_address(sg) ((sg)->dma_address) |
| 37 | #define sg_dma_len(sg) ((sg)->dma_length) | |
| 38 | ||
| 89edce0b | 39 | #ifdef __powerpc64__ |
| 1da177e4 | 40 | #define ISA_DMA_THRESHOLD (~0UL) |
| 89edce0b | 41 | #endif |
| 1da177e4 | 42 | |
| 78bdc310 JA |
43 | #define ARCH_HAS_SG_CHAIN |
| 44 | ||
| 89edce0b SR |
45 | #endif /* __KERNEL__ */ |
| 46 | #endif /* _ASM_POWERPC_SCATTERLIST_H */ |