1 #ifndef _ASMARM_SCATTERLIST_H 2 #define _ASMARM_SCATTERLIST_H 3 4 #include <asm/memory.h> 5 #include <asm/types.h> 6 7 struct scatterlist { 8 struct page *page; /* buffer page */ 9 unsigned int offset; /* buffer offset */ 10 dma_addr_t dma_address; /* dma address */ 11 unsigned int length; /* length */ 12 }; 13 14 /* 15 * These macros should be used after a pci_map_sg call has been done 16 * to get bus addresses of each of the SG entries and their lengths. 17 * You should only work with the number of sg entries pci_map_sg 18 * returns, or alternatively stop on the first sg_dma_len(sg) which 19 * is 0. 20 */ 21 #define sg_dma_address(sg) ((sg)->dma_address) 22 #define sg_dma_len(sg) ((sg)->length) 23 24 #endif /* _ASMARM_SCATTERLIST_H */ 25
