diff options
Diffstat (limited to 'include/asm-sh/scatterlist.h')
| -rw-r--r-- | include/asm-sh/scatterlist.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-sh/scatterlist.h b/include/asm-sh/scatterlist.h index 7b91df14002..d19e7cd3b02 100644 --- a/include/asm-sh/scatterlist.h +++ b/include/asm-sh/scatterlist.h @@ -10,4 +10,13 @@ struct scatterlist { #define ISA_DMA_THRESHOLD (0x1fffffff) +/* 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 /* !(__ASM_SH_SCATTERLIST_H) */ |