diff options
Diffstat (limited to 'include/asm-blackfin/scatterlist.h')
| -rw-r--r-- | include/asm-blackfin/scatterlist.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-blackfin/scatterlist.h b/include/asm-blackfin/scatterlist.h new file mode 100644 index 00000000000..60e07b92044 --- /dev/null +++ b/include/asm-blackfin/scatterlist.h @@ -0,0 +1,26 @@ +#ifndef _BLACKFIN_SCATTERLIST_H +#define _BLACKFIN_SCATTERLIST_H + +#include <linux/mm.h> + +struct scatterlist { + struct page *page; + unsigned int offset; + dma_addr_t dma_address; + unsigned int 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_address(sg) (page_address((sg)->page) + (sg)->offset) +#define sg_dma_address(sg) ((sg)->dma_address) +#define sg_dma_len(sg) ((sg)->length) + +#define ISA_DMA_THRESHOLD (0xffffffff) + +#endif /* !(_BLACKFIN_SCATTERLIST_H) */ |