| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 1 | #ifndef __ASM_GENERIC_SCATTERLIST_H |
| 2 | #define __ASM_GENERIC_SCATTERLIST_H |
| 3 | |
| 4 | #include <linux/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; |
| FUJITA Tomonori | 18e9830 | 2010-05-26 14:44:32 -0700 | [diff] [blame] | 14 | #ifdef CONFIG_NEED_SG_DMA_LENGTH |
| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 15 | unsigned int dma_length; |
| FUJITA Tomonori | 18e9830 | 2010-05-26 14:44:32 -0700 | [diff] [blame] | 16 | #endif |
| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 17 | }; |
| 18 | |
| 19 | /* |
| 20 | * These macros should be used after a dma_map_sg call has been done |
| 21 | * to get bus addresses of each of the SG entries and their lengths. |
| 22 | * You should only work with the number of sg entries pci_map_sg |
| 23 | * returns, or alternatively stop on the first sg_dma_len(sg) which |
| 24 | * is 0. |
| 25 | */ |
| 26 | #define sg_dma_address(sg) ((sg)->dma_address) |
| FUJITA Tomonori | 18e9830 | 2010-05-26 14:44:32 -0700 | [diff] [blame] | 27 | |
| 28 | #ifdef CONFIG_NEED_SG_DMA_LENGTH |
| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 29 | #define sg_dma_len(sg) ((sg)->dma_length) |
| 30 | #else |
| 31 | #define sg_dma_len(sg) ((sg)->length) |
| FUJITA Tomonori | 18e9830 | 2010-05-26 14:44:32 -0700 | [diff] [blame] | 32 | #endif |
| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 33 | |
| Arnd Bergmann | aafe4db | 2009-05-13 22:56:33 +0000 | [diff] [blame] | 34 | #endif /* __ASM_GENERIC_SCATTERLIST_H */ |