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-rw-r--r--arch/xtensa/include/asm/scatterlist.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/scatterlist.h b/arch/xtensa/include/asm/scatterlist.h
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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#include <asm/types.h>
15
16struct scatterlist {
17#ifdef CONFIG_DEBUG_SG
18 unsigned long sg_magic;
19#endif
20 unsigned long page_link;
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 */