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Diffstat (limited to 'arch/ia64/include/asm/scatterlist.h')
| -rw-r--r-- | arch/ia64/include/asm/scatterlist.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/scatterlist.h b/arch/ia64/include/asm/scatterlist.h new file mode 100644 index 000000000000..d6f57874041d --- /dev/null +++ b/arch/ia64/include/asm/scatterlist.h @@ -0,0 +1,38 @@ +#ifndef _ASM_IA64_SCATTERLIST_H +#define _ASM_IA64_SCATTERLIST_H + +/* + * Modified 1998-1999, 2001-2002, 2004 + * David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co + */ + +#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; /* buffer length */ + + dma_addr_t dma_address; + unsigned int dma_length; +}; + +/* + * It used to be that ISA_DMA_THRESHOLD had something to do with the + * DMA-limits of ISA-devices. Nowadays, its only remaining use (apart + * from the aha1542.c driver, which isn't 64-bit clean anyhow) is to + * tell the block-layer (via BLK_BOUNCE_ISA) what the max. physical + * address of a page is that is allocated with GFP_DMA. On IA-64, + * that's 4GB - 1. + */ +#define ISA_DMA_THRESHOLD 0xffffffff + +#define sg_dma_len(sg) ((sg)->dma_length) +#define sg_dma_address(sg) ((sg)->dma_address) + +#define ARCH_HAS_SG_CHAIN + +#endif /* _ASM_IA64_SCATTERLIST_H */ |