diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2009-09-08 17:55:21 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-09-08 17:55:21 -0700 |
| commit | bbb20089a3275a19e475dbc21320c3742e3ca423 (patch) | |
| tree | 216fdc1cbef450ca688135c5b8969169482d9a48 /include/asm-generic/scatterlist.h | |
| parent | 3e48e656903e9fd8bc805c6a2c4264d7808d315b (diff) | |
| parent | 657a77fa7284d8ae28dfa48f1dc5d919bf5b2843 (diff) | |
Merge branch 'dmaengine' into async-tx-next
Conflicts:
crypto/async_tx/async_xor.c
drivers/dma/ioat/dma_v2.h
drivers/dma/ioat/pci.c
drivers/md/raid5.c
Diffstat (limited to 'include/asm-generic/scatterlist.h')
| -rw-r--r-- | include/asm-generic/scatterlist.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/include/asm-generic/scatterlist.h b/include/asm-generic/scatterlist.h new file mode 100644 index 00000000000..8b9454496a7 --- /dev/null +++ b/include/asm-generic/scatterlist.h @@ -0,0 +1,43 @@ +#ifndef __ASM_GENERIC_SCATTERLIST_H +#define __ASM_GENERIC_SCATTERLIST_H + +#include <linux/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; +}; + +/* + * These macros should be used after a dma_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) +#ifndef sg_dma_len +/* + * Normally, you have an iommu on 64 bit machines, but not on 32 bit + * machines. Architectures that are differnt should override this. + */ +#if __BITS_PER_LONG == 64 +#define sg_dma_len(sg) ((sg)->dma_length) +#else +#define sg_dma_len(sg) ((sg)->length) +#endif /* 64 bit */ +#endif /* sg_dma_len */ + +#ifndef ISA_DMA_THRESHOLD +#define ISA_DMA_THRESHOLD (~0UL) +#endif + +#define ARCH_HAS_SG_CHAIN + +#endif /* __ASM_GENERIC_SCATTERLIST_H */ |