projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 9a8fd558 CZ |
1 | /* |
| 2 | * include/asm-xtensa/scatterlist.h | |
| 3 | * | |
| 4 | * This file is subject to the terms and conditions of the GNU General Public | |
| 5 | * License. See the file "COPYING" in the main directory of this archive | |
| 6 | * for more details. | |
| 7 | * | |
| 8 | * Copyright (C) 2001 - 2005 Tensilica Inc. | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef _XTENSA_SCATTERLIST_H | |
| 12 | #define _XTENSA_SCATTERLIST_H | |
| 13 | ||
| a9dfd281 JD |
14 | #include <asm/types.h> |
| 15 | ||
| 9a8fd558 | 16 | struct scatterlist { |
| d6ec0842 JA |
17 | #ifdef CONFIG_DEBUG_SG |
| 18 | unsigned long sg_magic; | |
| 19 | #endif | |
| 18dabf47 | 20 | unsigned long page_link; |
| 9a8fd558 CZ |
21 | unsigned int offset; |
| 22 | dma_addr_t dma_address; | |
| 23 | unsigned int length; | |
| 24 | }; | |
| 25 | ||
| 26 | /* | |
| 27 | * These macros should be used after a pci_map_sg call has been done | |
| 28 | * to get bus addresses of each of the SG entries and their lengths. | |
| 29 | * You should only work with the number of sg entries pci_map_sg | |
| 30 | * returns, or alternatively stop on the first sg_dma_len(sg) which | |
| 31 | * is 0. | |
| 32 | */ | |
| 33 | #define sg_dma_address(sg) ((sg)->dma_address) | |
| 34 | #define sg_dma_len(sg) ((sg)->length) | |
| 35 | ||
| 36 | ||
| 37 | #define ISA_DMA_THRESHOLD (~0UL) | |
| 38 | ||
| 39 | #endif /* _XTENSA_SCATTERLIST_H */ |