1 #ifndef _ASM_IA64_SCATTERLIST_H
2 #define _ASM_IA64_SCATTERLIST_H
5 * Modified 1998-1999, 2001-2002, 2004
6 * David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
12 #ifdef CONFIG_DEBUG_SG
13 unsigned long sg_magic;
15 unsigned long page_link;
17 unsigned int length; /* buffer length */
19 dma_addr_t dma_address;
20 unsigned int dma_length;
24 * It used to be that ISA_DMA_THRESHOLD had something to do with the
25 * DMA-limits of ISA-devices. Nowadays, its only remaining use (apart
26 * from the aha1542.c driver, which isn't 64-bit clean anyhow) is to
27 * tell the block-layer (via BLK_BOUNCE_ISA) what the max. physical
28 * address of a page is that is allocated with GFP_DMA. On IA-64,
31 #define ISA_DMA_THRESHOLD 0xffffffff
33 #define sg_dma_len(sg) ((sg)->dma_length)
34 #define sg_dma_address(sg) ((sg)->dma_address)
36 #define ARCH_HAS_SG_CHAIN
38 #endif /* _ASM_IA64_SCATTERLIST_H */