#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 { struct page *page; 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) #endif /* _ASM_IA64_SCATTERLIST_H */