| #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 */ |