| 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 | |
| Jean Delvare | a9dfd28 | 2007-03-06 02:45:12 -0800 | [diff] [blame] | 14 | #include <asm/types.h> |
| 15 | |
| Chris Zankel | 9a8fd55 | 2005-06-23 22:01:26 -0700 | [diff] [blame] | 16 | struct scatterlist { |
| Jens Axboe | d6ec084 | 2007-10-22 20:01:06 +0200 | [diff] [blame] | 17 | #ifdef CONFIG_DEBUG_SG |
| 18 | unsigned long sg_magic; |
| 19 | #endif |
| Jens Axboe | 18dabf4 | 2007-10-22 19:57:20 +0200 | [diff] [blame] | 20 | unsigned long page_link; |
| Chris Zankel | 9a8fd55 | 2005-06-23 22:01:26 -0700 | [diff] [blame] | 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 */ |