diff options
Diffstat (limited to 'include/asm-arm/scatterlist.h')
| -rw-r--r-- | include/asm-arm/scatterlist.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/asm-arm/scatterlist.h b/include/asm-arm/scatterlist.h new file mode 100644 index 000000000000..83b876fb04cc --- /dev/null +++ b/include/asm-arm/scatterlist.h @@ -0,0 +1,25 @@ +#ifndef _ASMARM_SCATTERLIST_H +#define _ASMARM_SCATTERLIST_H + +#include <asm/memory.h> +#include <asm/types.h> + +struct scatterlist { + struct page *page; /* buffer page */ + unsigned int offset; /* buffer offset */ + dma_addr_t dma_address; /* dma address */ + unsigned int length; /* length */ + char *__address; /* for set_dma_addr */ +}; + +/* + * 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)->length) + +#endif /* _ASMARM_SCATTERLIST_H */ |