| Chris Zankel | 9a8fd55 | 2005-06-23 22:01:26 -0700 | [diff] [blame] | 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 | |
| 14 | struct scatterlist { |
| 15 | struct page *page; |
| 16 | unsigned int offset; |
| 17 | dma_addr_t dma_address; |
| 18 | unsigned int length; |
| 19 | }; |
| 20 | |
| 21 | /* |
| 22 | * These macros should be used after a pci_map_sg call has been done |
| 23 | * to get bus addresses of each of the SG entries and their lengths. |
| 24 | * You should only work with the number of sg entries pci_map_sg |
| 25 | * returns, or alternatively stop on the first sg_dma_len(sg) which |
| 26 | * is 0. |
| 27 | */ |
| 28 | #define sg_dma_address(sg) ((sg)->dma_address) |
| 29 | #define sg_dma_len(sg) ((sg)->length) |
| 30 | |
| 31 | |
| 32 | #define ISA_DMA_THRESHOLD (~0UL) |
| 33 | |
| 34 | #endif /* _XTENSA_SCATTERLIST_H */ |