projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _ASM_IA64_SCATTERLIST_H |
| 2 | #define _ASM_IA64_SCATTERLIST_H | |
| 3 | ||
| 4 | /* | |
| 5 | * Modified 1998-1999, 2001-2002, 2004 | |
| 6 | * David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co | |
| 7 | */ | |
| 8 | ||
| a9dfd281 JD |
9 | #include <asm/types.h> |
| 10 | ||
| 1da177e4 | 11 | struct scatterlist { |
| d6ec0842 JA |
12 | #ifdef CONFIG_DEBUG_SG |
| 13 | unsigned long sg_magic; | |
| 14 | #endif | |
| 18dabf47 | 15 | unsigned long page_link; |
| 1da177e4 LT |
16 | unsigned int offset; |
| 17 | unsigned int length; /* buffer length */ | |
| 18 | ||
| 19 | dma_addr_t dma_address; | |
| 20 | unsigned int dma_length; | |
| 21 | }; | |
| 22 | ||
| 23 | /* | |
| 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, | |
| 29 | * that's 4GB - 1. | |
| 30 | */ | |
| 31 | #define ISA_DMA_THRESHOLD 0xffffffff | |
| 32 | ||
| 7806ca89 TL |
33 | #define sg_dma_len(sg) ((sg)->dma_length) |
| 34 | #define sg_dma_address(sg) ((sg)->dma_address) | |
| 35 | ||
| 9b6eccfc JA |
36 | #define ARCH_HAS_SG_CHAIN |
| 37 | ||
| 1da177e4 | 38 | #endif /* _ASM_IA64_SCATTERLIST_H */ |