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 #ifdef CONFIG_DEBUG_SG 9 unsigned long sg_magic; 10 #endif 11 unsigned long page_link; 12 unsigned int offset; /* buffer offset */ 13 dma_addr_t dma_address; /* dma address */ 14 unsigned int length; /* length */ 15 }; 16 17 /* 18 * These macros should be used after a pci_map_sg call has been done 19 * to get bus addresses of each of the SG entries and their lengths. 20 * You should only work with the number of sg entries pci_map_sg 21 * returns, or alternatively stop on the first sg_dma_len(sg) which 22 * is 0. 23 */ 24 #define sg_dma_address(sg) ((sg)->dma_address) 25 #define sg_dma_len(sg) ((sg)->length) 26 27 #endif /* _ASMARM_SCATTERLIST_H */ 28