2138422bba
Currently, the 32-bit code uses sg->length instead of sg->dma_lentgh to report sg_dma_len. However, since the default dma code for 32-bit (the dma_direct case) sets dma_length and length to the same thing, we should be able to use dma_length there as well. This gets rid of some 32-vs-64-bit ifdefs, and is needed by the swiotlb code which actually distinguishes between dma_length and length. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
#ifndef _ASM_POWERPC_SCATTERLIST_H
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#define _ASM_POWERPC_SCATTERLIST_H
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/*
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* Copyright (C) 2001 PPC64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifdef __KERNEL__
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#include <linux/types.h>
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#include <asm/dma.h>
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struct scatterlist {
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#ifdef CONFIG_DEBUG_SG
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unsigned long sg_magic;
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#endif
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unsigned long page_link;
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unsigned int offset;
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unsigned int length;
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/* For TCE or SWIOTLB support */
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dma_addr_t dma_address;
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u32 dma_length;
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};
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/*
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* These macros should be used after a dma_map_sg call has been done
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* to get bus addresses of each of the SG entries and their lengths.
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* You should only work with the number of sg entries pci_map_sg
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* returns, or alternatively stop on the first sg_dma_len(sg) which
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* is 0.
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*/
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#define sg_dma_address(sg) ((sg)->dma_address)
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#define sg_dma_len(sg) ((sg)->dma_length)
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#ifdef __powerpc64__
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#define ISA_DMA_THRESHOLD (~0UL)
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#endif
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#define ARCH_HAS_SG_CHAIN
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_SCATTERLIST_H */
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