diff options
Diffstat (limited to 'arch/blackfin/include/asm/scatterlist.h')
| -rw-r--r-- | arch/blackfin/include/asm/scatterlist.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/scatterlist.h b/arch/blackfin/include/asm/scatterlist.h new file mode 100644 index 00000000000..04f448711cd --- /dev/null +++ b/arch/blackfin/include/asm/scatterlist.h @@ -0,0 +1,28 @@ +#ifndef _BLACKFIN_SCATTERLIST_H +#define _BLACKFIN_SCATTERLIST_H + +#include <linux/mm.h> + +struct scatterlist { +#ifdef CONFIG_DEBUG_SG + unsigned long sg_magic; +#endif + unsigned long page_link; + 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_dma_address(sg) ((sg)->dma_address) +#define sg_dma_len(sg) ((sg)->length) + +#define ISA_DMA_THRESHOLD (0xffffffff) + +#endif /* !(_BLACKFIN_SCATTERLIST_H) */ |