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35 lines
777 B
35 lines
777 B
#ifndef _ASM_X86_SCATTERLIST_H
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#define _ASM_X86_SCATTERLIST_H
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#include <asm/types.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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dma_addr_t dma_address;
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#ifdef CONFIG_X86_64
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unsigned int dma_length;
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#endif
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};
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#define ARCH_HAS_SG_CHAIN
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#define ISA_DMA_THRESHOLD (0x00ffffff)
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/*
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* These macros should be used after a pci_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.
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*/
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#define sg_dma_address(sg) ((sg)->dma_address)
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#ifdef CONFIG_X86_32
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# define sg_dma_len(sg) ((sg)->length)
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#else
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# define sg_dma_len(sg) ((sg)->dma_length)
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#endif
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#endif
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