| #ifdef __KERNEL__ |
| #ifndef _PPC_SCATTERLIST_H |
| #define _PPC_SCATTERLIST_H |
| |
| #include <asm/dma.h> |
| |
| struct scatterlist { |
| char *address; /* Location data is to be transferred to, |
| * or NULL for highmem page */ |
| struct page * page; /* Location for highmem page, if any */ |
| unsigned int offset; /* for highmem, page offset */ |
| unsigned int length; /* length at address or page+offset */ |
| |
| dma_addr_t dma_address; /* phys/bus dma address */ |
| unsigned int dma_length; /* number of bytes mapped at dma_address */ |
| /* Note that if we coalesce multiple scatterlist elements, |
| dma_length can be different from length */ |
| }; |
| |
| /* |
| * These macros should be used after a pci_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) |
| #define sg_dma_len(sg) ((sg)->dma_length) |
| |
| #endif /* !(_PPC_SCATTERLIST_H) */ |
| #endif /* __KERNEL__ */ |
