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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 CZ |
16 | struct scatterlist { |
17 | struct page *page; | |
18 | unsigned int offset; | |
19 | dma_addr_t dma_address; | |
20 | unsigned int length; | |
21 | }; | |
22 | ||
23 | /* | |
24 | * These macros should be used after a pci_map_sg call has been done | |
25 | * to get bus addresses of each of the SG entries and their lengths. | |
26 | * You should only work with the number of sg entries pci_map_sg | |
27 | * returns, or alternatively stop on the first sg_dma_len(sg) which | |
28 | * is 0. | |
29 | */ | |
30 | #define sg_dma_address(sg) ((sg)->dma_address) | |
31 | #define sg_dma_len(sg) ((sg)->length) | |
32 | ||
33 | ||
34 | #define ISA_DMA_THRESHOLD (~0UL) | |
35 | ||
36 | #endif /* _XTENSA_SCATTERLIST_H */ |