Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 1 | /* DMA mapping. Nothing tricky here, just virt_to_phys */ |
| 2 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | #ifndef _ASM_CRIS_DMA_MAPPING_H |
| 4 | #define _ASM_CRIS_DMA_MAPPING_H |
| 5 | |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 6 | #include <linux/mm.h> |
| 7 | #include <linux/kernel.h> |
Christoph Hellwig | 84be456 | 2015-05-01 12:46:15 +0200 | [diff] [blame^] | 8 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 10 | #include <asm/cache.h> |
| 11 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 13 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
| 14 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 16 | #ifdef CONFIG_PCI |
Dmitry Baryshkov | 8fa8b9f | 2008-07-20 15:00:32 +0400 | [diff] [blame] | 17 | #include <asm-generic/dma-coherent.h> |
| 18 | |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 19 | void *dma_alloc_coherent(struct device *dev, size_t size, |
Al Viro | 43b7eae | 2005-10-21 03:21:13 -0400 | [diff] [blame] | 20 | dma_addr_t *dma_handle, gfp_t flag); |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 21 | |
| 22 | void dma_free_coherent(struct device *dev, size_t size, |
| 23 | void *vaddr, dma_addr_t dma_handle); |
| 24 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | static inline void * |
| 26 | dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, |
Al Viro | 43b7eae | 2005-10-21 03:21:13 -0400 | [diff] [blame] | 27 | gfp_t flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | { |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 29 | BUG(); |
| 30 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | static inline void |
| 34 | dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 35 | dma_addr_t dma_handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | { |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 37 | BUG(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | } |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 39 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | static inline dma_addr_t |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 41 | dma_map_single(struct device *dev, void *ptr, size_t size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | enum dma_data_direction direction) |
| 43 | { |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 44 | BUG_ON(direction == DMA_NONE); |
| 45 | return virt_to_phys(ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | } |
| 47 | |
| 48 | static inline void |
| 49 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, |
| 50 | enum dma_data_direction direction) |
| 51 | { |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 52 | BUG_ON(direction == DMA_NONE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | static inline int |
| 56 | dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, |
| 57 | enum dma_data_direction direction) |
| 58 | { |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 59 | printk("Map sg\n"); |
| 60 | return nents; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | } |
| 62 | |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 63 | static inline dma_addr_t |
| 64 | dma_map_page(struct device *dev, struct page *page, unsigned long offset, |
| 65 | size_t size, enum dma_data_direction direction) |
| 66 | { |
| 67 | BUG_ON(direction == DMA_NONE); |
| 68 | return page_to_phys(page) + offset; |
| 69 | } |
| 70 | |
| 71 | static inline void |
| 72 | dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, |
| 73 | enum dma_data_direction direction) |
| 74 | { |
| 75 | BUG_ON(direction == DMA_NONE); |
| 76 | } |
| 77 | |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | static inline void |
| 80 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, |
| 81 | enum dma_data_direction direction) |
| 82 | { |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 83 | BUG_ON(direction == DMA_NONE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | static inline void |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 87 | dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, |
| 88 | enum dma_data_direction direction) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | static inline void |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 93 | dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, |
| 94 | enum dma_data_direction direction) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 98 | static inline void |
| 99 | dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, |
| 100 | unsigned long offset, size_t size, |
| 101 | enum dma_data_direction direction) |
| 102 | { |
| 103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 105 | static inline void |
| 106 | dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, |
| 107 | unsigned long offset, size_t size, |
| 108 | enum dma_data_direction direction) |
| 109 | { |
| 110 | } |
| 111 | |
| 112 | static inline void |
| 113 | dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, |
| 114 | enum dma_data_direction direction) |
| 115 | { |
| 116 | } |
| 117 | |
| 118 | static inline void |
| 119 | dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, |
| 120 | enum dma_data_direction direction) |
| 121 | { |
| 122 | } |
| 123 | |
| 124 | static inline int |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 125 | dma_mapping_error(struct device *dev, dma_addr_t dma_addr) |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 126 | { |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | static inline int |
| 131 | dma_supported(struct device *dev, u64 mask) |
| 132 | { |
| 133 | /* |
| 134 | * we fall back to GFP_DMA when the mask isn't all 1s, |
| 135 | * so we can't guarantee allocations that must be |
| 136 | * within a tighter range than GFP_DMA.. |
| 137 | */ |
| 138 | if(mask < 0x00ffffff) |
| 139 | return 0; |
| 140 | |
| 141 | return 1; |
| 142 | } |
| 143 | |
| 144 | static inline int |
| 145 | dma_set_mask(struct device *dev, u64 mask) |
| 146 | { |
| 147 | if(!dev->dma_mask || !dma_supported(dev, mask)) |
| 148 | return -EIO; |
| 149 | |
| 150 | *dev->dma_mask = mask; |
| 151 | |
| 152 | return 0; |
| 153 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | static inline void |
Ralf Baechle | d3fa72e | 2006-12-06 20:38:56 -0800 | [diff] [blame] | 156 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | enum dma_data_direction direction) |
| 158 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | } |
| 160 | |
Geert Uytterhoeven | 063aceb | 2013-01-27 09:33:23 +0000 | [diff] [blame] | 161 | /* drivers/base/dma-mapping.c */ |
| 162 | extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, |
| 163 | void *cpu_addr, dma_addr_t dma_addr, size_t size); |
| 164 | extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt, |
| 165 | void *cpu_addr, dma_addr_t dma_addr, |
| 166 | size_t size); |
| 167 | |
| 168 | #define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s) |
| 169 | #define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s) |
| 170 | |
Mikael Starvik | 59c6113 | 2005-07-27 11:44:40 -0700 | [diff] [blame] | 171 | |
| 172 | #endif |