0,0 → 1,34 |
#ifndef __ASM_GENERIC_SCATTERLIST_H |
#define __ASM_GENERIC_SCATTERLIST_H |
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#include <linux/types.h> |
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struct scatterlist { |
#ifdef CONFIG_DEBUG_SG |
unsigned long sg_magic; |
#endif |
unsigned long page_link; |
unsigned int offset; |
unsigned int length; |
dma_addr_t dma_address; |
#ifdef CONFIG_NEED_SG_DMA_LENGTH |
unsigned int dma_length; |
#endif |
}; |
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/* |
* These macros should be used after a dma_map_sg call has been done |
* to get bus addresses of each of the SG entries and their lengths. |
* You should only work with the number of sg entries pci_map_sg |
* returns, or alternatively stop on the first sg_dma_len(sg) which |
* is 0. |
*/ |
#define sg_dma_address(sg) ((sg)->dma_address) |
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#ifdef CONFIG_NEED_SG_DMA_LENGTH |
#define sg_dma_len(sg) ((sg)->dma_length) |
#else |
#define sg_dma_len(sg) ((sg)->length) |
#endif |
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#endif /* __ASM_GENERIC_SCATTERLIST_H */ |