diff options
Diffstat (limited to 'include/asm-x86_64/scatterlist.h')
| -rw-r--r-- | include/asm-x86_64/scatterlist.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/asm-x86_64/scatterlist.h b/include/asm-x86_64/scatterlist.h new file mode 100644 index 000000000000..49d89f8129cd --- /dev/null +++ b/include/asm-x86_64/scatterlist.h @@ -0,0 +1,22 @@ +#ifndef _X8664_SCATTERLIST_H +#define _X8664_SCATTERLIST_H + +struct scatterlist { + struct page *page; + unsigned int offset; + unsigned int length; + dma_addr_t dma_address; + unsigned int dma_length; +}; + +#define ISA_DMA_THRESHOLD (0x00ffffff) + +/* 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. + */ +#define sg_dma_address(sg) ((sg)->dma_address) +#define sg_dma_len(sg) ((sg)->dma_length) + +#endif |