Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 1 | #ifndef __LINUX_SWIOTLB_H |
| 2 | #define __LINUX_SWIOTLB_H |
| 3 | |
| 4 | #include <linux/types.h> |
| 5 | |
| 6 | struct device; |
| 7 | struct dma_attrs; |
| 8 | struct scatterlist; |
| 9 | |
Ian Campbell | 0016fde | 2008-12-16 12:17:27 -0800 | [diff] [blame] | 10 | /* |
| 11 | * Maximum allowable number of contiguous slabs to map, |
| 12 | * must be a power of 2. What is the appropriate value ? |
| 13 | * The complexity of {map,unmap}_single is linearly dependent on this value. |
| 14 | */ |
| 15 | #define IO_TLB_SEGSIZE 128 |
| 16 | |
Ian Campbell | 0016fde | 2008-12-16 12:17:27 -0800 | [diff] [blame] | 17 | /* |
| 18 | * log of the size of each IO TLB slab. The number of slabs is command line |
| 19 | * controllable. |
| 20 | */ |
| 21 | #define IO_TLB_SHIFT 11 |
| 22 | |
FUJITA Tomonori | ad32e8c | 2009-11-10 19:46:19 +0900 | [diff] [blame^] | 23 | extern void swiotlb_init(int verbose); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 24 | |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 25 | extern void |
| 26 | *swiotlb_alloc_coherent(struct device *hwdev, size_t size, |
| 27 | dma_addr_t *dma_handle, gfp_t flags); |
| 28 | |
| 29 | extern void |
| 30 | swiotlb_free_coherent(struct device *hwdev, size_t size, |
| 31 | void *vaddr, dma_addr_t dma_handle); |
| 32 | |
FUJITA Tomonori | f98eee8 | 2009-01-05 23:59:03 +0900 | [diff] [blame] | 33 | extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, |
| 34 | unsigned long offset, size_t size, |
| 35 | enum dma_data_direction dir, |
| 36 | struct dma_attrs *attrs); |
| 37 | extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, |
| 38 | size_t size, enum dma_data_direction dir, |
| 39 | struct dma_attrs *attrs); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 40 | |
| 41 | extern int |
| 42 | swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, |
| 43 | int direction); |
| 44 | |
| 45 | extern void |
| 46 | swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, |
| 47 | int direction); |
| 48 | |
| 49 | extern int |
| 50 | swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 51 | enum dma_data_direction dir, struct dma_attrs *attrs); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 52 | |
| 53 | extern void |
| 54 | swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 55 | int nelems, enum dma_data_direction dir, |
| 56 | struct dma_attrs *attrs); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 57 | |
| 58 | extern void |
| 59 | swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 60 | size_t size, enum dma_data_direction dir); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 61 | |
| 62 | extern void |
| 63 | swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 64 | int nelems, enum dma_data_direction dir); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 65 | |
| 66 | extern void |
| 67 | swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 68 | size_t size, enum dma_data_direction dir); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 69 | |
| 70 | extern void |
| 71 | swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 72 | int nelems, enum dma_data_direction dir); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 73 | |
| 74 | extern void |
| 75 | swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 76 | unsigned long offset, size_t size, |
| 77 | enum dma_data_direction dir); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 78 | |
| 79 | extern void |
| 80 | swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr, |
| 81 | unsigned long offset, size_t size, |
FUJITA Tomonori | 160c1d8 | 2009-01-05 23:59:02 +0900 | [diff] [blame] | 82 | enum dma_data_direction dir); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 83 | |
| 84 | extern int |
| 85 | swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); |
| 86 | |
| 87 | extern int |
| 88 | swiotlb_dma_supported(struct device *hwdev, u64 mask); |
| 89 | |
FUJITA Tomonori | 5740afd | 2009-11-10 19:46:18 +0900 | [diff] [blame] | 90 | #ifdef CONFIG_SWIOTLB |
| 91 | extern void __init swiotlb_free(void); |
| 92 | #else |
| 93 | static inline void swiotlb_free(void) { } |
| 94 | #endif |
| 95 | |
FUJITA Tomonori | ad32e8c | 2009-11-10 19:46:19 +0900 | [diff] [blame^] | 96 | extern void swiotlb_print_info(void); |
Joerg Roedel | 1648993 | 2008-10-15 22:01:03 -0700 | [diff] [blame] | 97 | #endif /* __LINUX_SWIOTLB_H */ |