| Thomas Gleixner | 3ebc51d | 2008-01-30 13:30:21 +0100 | [diff] [blame] | 1 | #ifndef _ASM_X86_SCATTERLIST_H |
| 2 | #define _ASM_X86_SCATTERLIST_H |
| 3 | |
| 4 | #include <asm/types.h> |
| 5 | |
| 6 | struct scatterlist { |
| 7 | #ifdef CONFIG_DEBUG_SG |
| 8 | unsigned long sg_magic; |
| 9 | #endif |
| 10 | unsigned long page_link; |
| 11 | unsigned int offset; |
| 12 | unsigned int length; |
| 13 | dma_addr_t dma_address; |
| 14 | #ifdef CONFIG_X86_64 |
| 15 | unsigned int dma_length; |
| 16 | #endif |
| 17 | }; |
| 18 | |
| 19 | #define ARCH_HAS_SG_CHAIN |
| 20 | #define ISA_DMA_THRESHOLD (0x00ffffff) |
| 21 | |
| 22 | /* |
| 23 | * These macros should be used after a pci_map_sg call has been done |
| 24 | * to get bus addresses of each of the SG entries and their lengths. |
| 25 | * You should only work with the number of sg entries pci_map_sg |
| 26 | * returns. |
| 27 | */ |
| 28 | #define sg_dma_address(sg) ((sg)->dma_address) |
| Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 29 | #ifdef CONFIG_X86_32 |
| Thomas Gleixner | 3ebc51d | 2008-01-30 13:30:21 +0100 | [diff] [blame] | 30 | # define sg_dma_len(sg) ((sg)->length) |
| Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 31 | #else |
| Thomas Gleixner | 3ebc51d | 2008-01-30 13:30:21 +0100 | [diff] [blame] | 32 | # define sg_dma_len(sg) ((sg)->dma_length) |
| 33 | #endif |
| 34 | |
| Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 35 | #endif |