Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __ASM_SH_DMA_MAPPING_H |
| 2 | #define __ASM_SH_DMA_MAPPING_H |
| 3 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | #include <linux/mm.h> |
Jens Axboe | 71df50a | 2007-10-23 12:52:48 +0200 | [diff] [blame] | 5 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | #include <asm/io.h> |
| 7 | |
| 8 | struct pci_dev; |
| 9 | extern void *consistent_alloc(struct pci_dev *hwdev, size_t size, |
| 10 | dma_addr_t *dma_handle); |
| 11 | extern void consistent_free(struct pci_dev *hwdev, size_t size, |
| 12 | void *vaddr, dma_addr_t dma_handle); |
| 13 | |
| 14 | #define dma_supported(dev, mask) (1) |
| 15 | |
| 16 | static inline int dma_set_mask(struct device *dev, u64 mask) |
| 17 | { |
| 18 | if (!dev->dma_mask || !dma_supported(dev, mask)) |
| 19 | return -EIO; |
| 20 | |
| 21 | *dev->dma_mask = mask; |
| 22 | |
| 23 | return 0; |
| 24 | } |
| 25 | |
| 26 | static inline void *dma_alloc_coherent(struct device *dev, size_t size, |
Al Viro | 970a9e7 | 2005-10-21 03:21:53 -0400 | [diff] [blame] | 27 | dma_addr_t *dma_handle, gfp_t flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | { |
| 29 | return consistent_alloc(NULL, size, dma_handle); |
| 30 | } |
| 31 | |
| 32 | static inline void dma_free_coherent(struct device *dev, size_t size, |
| 33 | void *vaddr, dma_addr_t dma_handle) |
| 34 | { |
| 35 | consistent_free(NULL, size, vaddr, dma_handle); |
| 36 | } |
| 37 | |
Paul Mundt | 599c26d | 2007-05-14 09:10:46 +0900 | [diff] [blame] | 38 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
| 39 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
| 40 | #define dma_is_consistent(d, h) (1) |
| 41 | |
Ralf Baechle | d3fa72e | 2006-12-06 20:38:56 -0800 | [diff] [blame] | 42 | static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | enum dma_data_direction dir) |
| 44 | { |
Adrian Bunk | 6dc8087 | 2007-10-24 16:35:26 +0900 | [diff] [blame] | 45 | unsigned long start = (unsigned long) vaddr; |
| 46 | unsigned long s = start & L1_CACHE_ALIGN_MASK; |
| 47 | unsigned long e = (start + size) & L1_CACHE_ALIGN_MASK; |
Ralf Baechle | 622a9ed | 2007-10-16 23:29:42 -0700 | [diff] [blame] | 48 | |
| 49 | for (; s <= e; s += L1_CACHE_BYTES) |
| 50 | asm volatile ("ocbp %0, 0" : : "r" (s)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | static inline dma_addr_t dma_map_single(struct device *dev, |
| 54 | void *ptr, size_t size, |
| 55 | enum dma_data_direction dir) |
| 56 | { |
| 57 | #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT) |
| 58 | if (dev->bus == &pci_bus_type) |
Paul Mundt | 75c4616 | 2007-07-31 13:11:25 +0900 | [diff] [blame] | 59 | return virt_to_phys(ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #endif |
Paul Mundt | 599c26d | 2007-05-14 09:10:46 +0900 | [diff] [blame] | 61 | dma_cache_sync(dev, ptr, size, dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Paul Mundt | 75c4616 | 2007-07-31 13:11:25 +0900 | [diff] [blame] | 63 | return virt_to_phys(ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | #define dma_unmap_single(dev, addr, size, dir) do { } while (0) |
| 67 | |
| 68 | static inline int dma_map_sg(struct device *dev, struct scatterlist *sg, |
| 69 | int nents, enum dma_data_direction dir) |
| 70 | { |
| 71 | int i; |
| 72 | |
| 73 | for (i = 0; i < nents; i++) { |
| 74 | #if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT) |
Jens Axboe | 71df50a | 2007-10-23 12:52:48 +0200 | [diff] [blame] | 75 | dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | #endif |
Jens Axboe | 71df50a | 2007-10-23 12:52:48 +0200 | [diff] [blame] | 77 | sg[i].dma_address = sg_phys(&sg[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | return nents; |
| 81 | } |
| 82 | |
| 83 | #define dma_unmap_sg(dev, sg, nents, dir) do { } while (0) |
| 84 | |
| 85 | static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, |
| 86 | unsigned long offset, size_t size, |
| 87 | enum dma_data_direction dir) |
| 88 | { |
| 89 | return dma_map_single(dev, page_address(page) + offset, size, dir); |
| 90 | } |
| 91 | |
| 92 | static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, |
| 93 | size_t size, enum dma_data_direction dir) |
| 94 | { |
| 95 | dma_unmap_single(dev, dma_address, size, dir); |
| 96 | } |
| 97 | |
| 98 | static inline void dma_sync_single(struct device *dev, dma_addr_t dma_handle, |
| 99 | size_t size, enum dma_data_direction dir) |
| 100 | { |
| 101 | #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT) |
| 102 | if (dev->bus == &pci_bus_type) |
| 103 | return; |
| 104 | #endif |
Paul Mundt | 75c4616 | 2007-07-31 13:11:25 +0900 | [diff] [blame] | 105 | dma_cache_sync(dev, phys_to_virt(dma_handle), size, dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | static inline void dma_sync_single_range(struct device *dev, |
| 109 | dma_addr_t dma_handle, |
| 110 | unsigned long offset, size_t size, |
| 111 | enum dma_data_direction dir) |
| 112 | { |
| 113 | #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT) |
| 114 | if (dev->bus == &pci_bus_type) |
| 115 | return; |
| 116 | #endif |
Paul Mundt | 75c4616 | 2007-07-31 13:11:25 +0900 | [diff] [blame] | 117 | dma_cache_sync(dev, phys_to_virt(dma_handle) + offset, size, dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | } |
| 119 | |
| 120 | static inline void dma_sync_sg(struct device *dev, struct scatterlist *sg, |
| 121 | int nelems, enum dma_data_direction dir) |
| 122 | { |
| 123 | int i; |
| 124 | |
| 125 | for (i = 0; i < nelems; i++) { |
| 126 | #if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT) |
Jens Axboe | 71df50a | 2007-10-23 12:52:48 +0200 | [diff] [blame] | 127 | dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | #endif |
Jens Axboe | 71df50a | 2007-10-23 12:52:48 +0200 | [diff] [blame] | 129 | sg[i].dma_address = sg_phys(&sg[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | } |
| 131 | } |
| 132 | |
| 133 | static inline void dma_sync_single_for_cpu(struct device *dev, |
| 134 | dma_addr_t dma_handle, size_t size, |
| 135 | enum dma_data_direction dir) |
Paul Mundt | 2126413 | 2006-09-12 14:36:46 +0900 | [diff] [blame] | 136 | { |
| 137 | dma_sync_single(dev, dma_handle, size, dir); |
| 138 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
| 140 | static inline void dma_sync_single_for_device(struct device *dev, |
| 141 | dma_addr_t dma_handle, size_t size, |
| 142 | enum dma_data_direction dir) |
Paul Mundt | 2126413 | 2006-09-12 14:36:46 +0900 | [diff] [blame] | 143 | { |
| 144 | dma_sync_single(dev, dma_handle, size, dir); |
| 145 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
Paul Mundt | 757e2d6 | 2007-08-10 02:47:31 +0900 | [diff] [blame] | 147 | static inline void dma_sync_single_range_for_cpu(struct device *dev, |
| 148 | dma_addr_t dma_handle, |
| 149 | unsigned long offset, |
| 150 | size_t size, |
| 151 | enum dma_data_direction direction) |
| 152 | { |
| 153 | dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction); |
| 154 | } |
| 155 | |
| 156 | static inline void dma_sync_single_range_for_device(struct device *dev, |
| 157 | dma_addr_t dma_handle, |
| 158 | unsigned long offset, |
| 159 | size_t size, |
| 160 | enum dma_data_direction direction) |
| 161 | { |
| 162 | dma_sync_single_for_device(dev, dma_handle+offset, size, direction); |
| 163 | } |
| 164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | static inline void dma_sync_sg_for_cpu(struct device *dev, |
| 166 | struct scatterlist *sg, int nelems, |
| 167 | enum dma_data_direction dir) |
Paul Mundt | 2126413 | 2006-09-12 14:36:46 +0900 | [diff] [blame] | 168 | { |
| 169 | dma_sync_sg(dev, sg, nelems, dir); |
| 170 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
| 172 | static inline void dma_sync_sg_for_device(struct device *dev, |
| 173 | struct scatterlist *sg, int nelems, |
| 174 | enum dma_data_direction dir) |
Paul Mundt | 2126413 | 2006-09-12 14:36:46 +0900 | [diff] [blame] | 175 | { |
| 176 | dma_sync_sg(dev, sg, nelems, dir); |
| 177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | static inline int dma_get_cache_alignment(void) |
| 180 | { |
| 181 | /* |
| 182 | * Each processor family will define its own L1_CACHE_SHIFT, |
| 183 | * L1_CACHE_BYTES wraps to this, so this is always safe. |
| 184 | */ |
| 185 | return L1_CACHE_BYTES; |
| 186 | } |
| 187 | |
| 188 | static inline int dma_mapping_error(dma_addr_t dma_addr) |
| 189 | { |
| 190 | return dma_addr == 0; |
| 191 | } |
| 192 | |
| 193 | #endif /* __ASM_SH_DMA_MAPPING_H */ |
| 194 | |