diff options
Diffstat (limited to 'arch/x86/include/asm/scatterlist.h')
| -rw-r--r-- | arch/x86/include/asm/scatterlist.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/x86/include/asm/scatterlist.h b/arch/x86/include/asm/scatterlist.h new file mode 100644 index 000000000000..ee48f880005d --- /dev/null +++ b/arch/x86/include/asm/scatterlist.h @@ -0,0 +1,33 @@ +#ifndef ASM_X86__SCATTERLIST_H +#define ASM_X86__SCATTERLIST_H + +#include <asm/types.h> + +struct scatterlist { +#ifdef CONFIG_DEBUG_SG + unsigned long sg_magic; +#endif + unsigned long page_link; + unsigned int offset; + unsigned int length; + dma_addr_t dma_address; + unsigned int dma_length; +}; + +#define ARCH_HAS_SG_CHAIN +#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) +#ifdef CONFIG_X86_32 +# define sg_dma_len(sg) ((sg)->length) +#else +# define sg_dma_len(sg) ((sg)->dma_length) +#endif + +#endif /* ASM_X86__SCATTERLIST_H */ |