| 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 | |
| Jean Delvare | a9dfd28 | 2007-03-06 02:45:12 -0800 | [diff] [blame] | 9 | #include <asm/types.h> |
| 10 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | struct scatterlist { |
| Jens Axboe | d6ec084 | 2007-10-22 20:01:06 +0200 | [diff] [blame] | 12 | #ifdef CONFIG_DEBUG_SG |
| 13 | unsigned long sg_magic; |
| 14 | #endif |
| Jens Axboe | 18dabf4 | 2007-10-22 19:57:20 +0200 | [diff] [blame] | 15 | unsigned long page_link; |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| Tony Luck | 7806ca8 | 2006-12-13 13:15:10 -0800 | [diff] [blame] | 33 | #define sg_dma_len(sg) ((sg)->dma_length) |
| 34 | #define sg_dma_address(sg) ((sg)->dma_address) |
| 35 | |
| Jens Axboe | 9b6eccf | 2007-10-16 11:27:26 +0200 | [diff] [blame] | 36 | #define ARCH_HAS_SG_CHAIN |
| 37 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #endif /* _ASM_IA64_SCATTERLIST_H */ |