| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 9 | struct scatterlist { |
| 10 | struct page *page; |
| 11 | unsigned int offset; |
| 12 | unsigned int length; /* buffer length */ |
| 13 | |
| 14 | dma_addr_t dma_address; |
| 15 | unsigned int dma_length; |
| 16 | }; |
| 17 | |
| 18 | /* |
| 19 | * It used to be that ISA_DMA_THRESHOLD had something to do with the |
| 20 | * DMA-limits of ISA-devices. Nowadays, its only remaining use (apart |
| 21 | * from the aha1542.c driver, which isn't 64-bit clean anyhow) is to |
| 22 | * tell the block-layer (via BLK_BOUNCE_ISA) what the max. physical |
| 23 | * address of a page is that is allocated with GFP_DMA. On IA-64, |
| 24 | * that's 4GB - 1. |
| 25 | */ |
| 26 | #define ISA_DMA_THRESHOLD 0xffffffff |
| 27 | |
| 28 | #endif /* _ASM_IA64_SCATTERLIST_H */ |