Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _PARISC_DMA_MAPPING_H |
| 2 | #define _PARISC_DMA_MAPPING_H |
| 3 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | #include <linux/mm.h> |
| 5 | #include <asm/cacheflush.h> |
| 6 | #include <asm/scatterlist.h> |
| 7 | |
Randy Dunlap | 5872fb9 | 2009-01-29 16:28:02 -0800 | [diff] [blame] | 8 | /* See Documentation/PCI/PCI-DMA-mapping.txt */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | struct hppa_dma_ops { |
| 10 | int (*dma_supported)(struct device *dev, u64 mask); |
Al Viro | 5c1fb41 | 2005-10-21 03:21:28 -0400 | [diff] [blame] | 11 | void *(*alloc_consistent)(struct device *dev, size_t size, dma_addr_t *iova, gfp_t flag); |
| 12 | void *(*alloc_noncoherent)(struct device *dev, size_t size, dma_addr_t *iova, gfp_t flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | void (*free_consistent)(struct device *dev, size_t size, void *vaddr, dma_addr_t iova); |
| 14 | dma_addr_t (*map_single)(struct device *dev, void *addr, size_t size, enum dma_data_direction direction); |
| 15 | void (*unmap_single)(struct device *dev, dma_addr_t iova, size_t size, enum dma_data_direction direction); |
| 16 | int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction direction); |
| 17 | void (*unmap_sg)(struct device *dev, struct scatterlist *sg, int nhwents, enum dma_data_direction direction); |
| 18 | void (*dma_sync_single_for_cpu)(struct device *dev, dma_addr_t iova, unsigned long offset, size_t size, enum dma_data_direction direction); |
| 19 | void (*dma_sync_single_for_device)(struct device *dev, dma_addr_t iova, unsigned long offset, size_t size, enum dma_data_direction direction); |
| 20 | void (*dma_sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg, int nelems, enum dma_data_direction direction); |
| 21 | void (*dma_sync_sg_for_device)(struct device *dev, struct scatterlist *sg, int nelems, enum dma_data_direction direction); |
| 22 | }; |
| 23 | |
| 24 | /* |
| 25 | ** We could live without the hppa_dma_ops indirection if we didn't want |
| 26 | ** to support 4 different coherent dma models with one binary (they will |
| 27 | ** someday be loadable modules): |
| 28 | ** I/O MMU consistent method dma_sync behavior |
| 29 | ** ============= ====================== ======================= |
| 30 | ** a) PA-7x00LC uncachable host memory flush/purge |
| 31 | ** b) U2/Uturn cachable host memory NOP |
| 32 | ** c) Ike/Astro cachable host memory NOP |
| 33 | ** d) EPIC/SAGA memory on EPIC/SAGA flush/reset DMA channel |
| 34 | ** |
| 35 | ** PA-7[13]00LC processors have a GSC bus interface and no I/O MMU. |
| 36 | ** |
| 37 | ** Systems (eg PCX-T workstations) that don't fall into the above |
| 38 | ** categories will need to modify the needed drivers to perform |
| 39 | ** flush/purge and allocate "regular" cacheable pages for everything. |
| 40 | */ |
| 41 | |
| 42 | #ifdef CONFIG_PA11 |
| 43 | extern struct hppa_dma_ops pcxl_dma_ops; |
| 44 | extern struct hppa_dma_ops pcx_dma_ops; |
| 45 | #endif |
| 46 | |
| 47 | extern struct hppa_dma_ops *hppa_dma_ops; |
| 48 | |
| 49 | static inline void * |
| 50 | dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, |
Al Viro | 5c1fb41 | 2005-10-21 03:21:28 -0400 | [diff] [blame] | 51 | gfp_t flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | { |
| 53 | return hppa_dma_ops->alloc_consistent(dev, size, dma_handle, flag); |
| 54 | } |
| 55 | |
| 56 | static inline void * |
| 57 | dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle, |
Al Viro | 5c1fb41 | 2005-10-21 03:21:28 -0400 | [diff] [blame] | 58 | gfp_t flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | { |
| 60 | return hppa_dma_ops->alloc_noncoherent(dev, size, dma_handle, flag); |
| 61 | } |
| 62 | |
| 63 | static inline void |
| 64 | dma_free_coherent(struct device *dev, size_t size, |
| 65 | void *vaddr, dma_addr_t dma_handle) |
| 66 | { |
| 67 | hppa_dma_ops->free_consistent(dev, size, vaddr, dma_handle); |
| 68 | } |
| 69 | |
| 70 | static inline void |
| 71 | dma_free_noncoherent(struct device *dev, size_t size, |
| 72 | void *vaddr, dma_addr_t dma_handle) |
| 73 | { |
| 74 | hppa_dma_ops->free_consistent(dev, size, vaddr, dma_handle); |
| 75 | } |
| 76 | |
| 77 | static inline dma_addr_t |
| 78 | dma_map_single(struct device *dev, void *ptr, size_t size, |
| 79 | enum dma_data_direction direction) |
| 80 | { |
| 81 | return hppa_dma_ops->map_single(dev, ptr, size, direction); |
| 82 | } |
| 83 | |
| 84 | static inline void |
| 85 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, |
| 86 | enum dma_data_direction direction) |
| 87 | { |
| 88 | hppa_dma_ops->unmap_single(dev, dma_addr, size, direction); |
| 89 | } |
| 90 | |
| 91 | static inline int |
| 92 | dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, |
| 93 | enum dma_data_direction direction) |
| 94 | { |
| 95 | return hppa_dma_ops->map_sg(dev, sg, nents, direction); |
| 96 | } |
| 97 | |
| 98 | static inline void |
| 99 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, |
| 100 | enum dma_data_direction direction) |
| 101 | { |
| 102 | hppa_dma_ops->unmap_sg(dev, sg, nhwentries, direction); |
| 103 | } |
| 104 | |
| 105 | static inline dma_addr_t |
| 106 | dma_map_page(struct device *dev, struct page *page, unsigned long offset, |
| 107 | size_t size, enum dma_data_direction direction) |
| 108 | { |
| 109 | return dma_map_single(dev, (page_address(page) + (offset)), size, direction); |
| 110 | } |
| 111 | |
| 112 | static inline void |
| 113 | dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, |
| 114 | enum dma_data_direction direction) |
| 115 | { |
| 116 | dma_unmap_single(dev, dma_address, size, direction); |
| 117 | } |
| 118 | |
| 119 | |
| 120 | static inline void |
| 121 | dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, |
| 122 | enum dma_data_direction direction) |
| 123 | { |
| 124 | if(hppa_dma_ops->dma_sync_single_for_cpu) |
| 125 | hppa_dma_ops->dma_sync_single_for_cpu(dev, dma_handle, 0, size, direction); |
| 126 | } |
| 127 | |
| 128 | static inline void |
| 129 | dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, |
| 130 | enum dma_data_direction direction) |
| 131 | { |
| 132 | if(hppa_dma_ops->dma_sync_single_for_device) |
| 133 | hppa_dma_ops->dma_sync_single_for_device(dev, dma_handle, 0, size, direction); |
| 134 | } |
| 135 | |
| 136 | static inline void |
| 137 | dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, |
| 138 | unsigned long offset, size_t size, |
| 139 | enum dma_data_direction direction) |
| 140 | { |
| 141 | if(hppa_dma_ops->dma_sync_single_for_cpu) |
| 142 | hppa_dma_ops->dma_sync_single_for_cpu(dev, dma_handle, offset, size, direction); |
| 143 | } |
| 144 | |
| 145 | static inline void |
| 146 | dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, |
| 147 | unsigned long offset, size_t size, |
| 148 | enum dma_data_direction direction) |
| 149 | { |
| 150 | if(hppa_dma_ops->dma_sync_single_for_device) |
| 151 | hppa_dma_ops->dma_sync_single_for_device(dev, dma_handle, offset, size, direction); |
| 152 | } |
| 153 | |
| 154 | static inline void |
| 155 | dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, |
| 156 | enum dma_data_direction direction) |
| 157 | { |
| 158 | if(hppa_dma_ops->dma_sync_sg_for_cpu) |
| 159 | hppa_dma_ops->dma_sync_sg_for_cpu(dev, sg, nelems, direction); |
| 160 | } |
| 161 | |
| 162 | static inline void |
| 163 | dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, |
| 164 | enum dma_data_direction direction) |
| 165 | { |
| 166 | if(hppa_dma_ops->dma_sync_sg_for_device) |
| 167 | hppa_dma_ops->dma_sync_sg_for_device(dev, sg, nelems, direction); |
| 168 | } |
| 169 | |
| 170 | static inline int |
| 171 | dma_supported(struct device *dev, u64 mask) |
| 172 | { |
| 173 | return hppa_dma_ops->dma_supported(dev, mask); |
| 174 | } |
| 175 | |
| 176 | static inline int |
| 177 | dma_set_mask(struct device *dev, u64 mask) |
| 178 | { |
| 179 | if(!dev->dma_mask || !dma_supported(dev, mask)) |
| 180 | return -EIO; |
| 181 | |
| 182 | *dev->dma_mask = mask; |
| 183 | |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | static inline int |
Ralf Baechle | f67637e | 2006-12-06 20:38:54 -0800 | [diff] [blame] | 188 | dma_is_consistent(struct device *dev, dma_addr_t dma_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | { |
| 190 | return (hppa_dma_ops->dma_sync_single_for_cpu == NULL); |
| 191 | } |
| 192 | |
| 193 | static inline void |
Ralf Baechle | d3fa72e | 2006-12-06 20:38:56 -0800 | [diff] [blame] | 194 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | enum dma_data_direction direction) |
| 196 | { |
| 197 | if(hppa_dma_ops->dma_sync_single_for_cpu) |
| 198 | flush_kernel_dcache_range((unsigned long)vaddr, size); |
| 199 | } |
| 200 | |
| 201 | static inline void * |
| 202 | parisc_walk_tree(struct device *dev) |
| 203 | { |
| 204 | struct device *otherdev; |
| 205 | if(likely(dev->platform_data != NULL)) |
| 206 | return dev->platform_data; |
| 207 | /* OK, just traverse the bus to find it */ |
| 208 | for(otherdev = dev->parent; otherdev; |
| 209 | otherdev = otherdev->parent) { |
| 210 | if(otherdev->platform_data) { |
| 211 | dev->platform_data = otherdev->platform_data; |
| 212 | break; |
| 213 | } |
| 214 | } |
| 215 | BUG_ON(!dev->platform_data); |
| 216 | return dev->platform_data; |
| 217 | } |
| 218 | |
| 219 | #define GET_IOC(dev) (HBA_DATA(parisc_walk_tree(dev))->iommu); |
| 220 | |
| 221 | |
| 222 | #ifdef CONFIG_IOMMU_CCIO |
| 223 | struct parisc_device; |
| 224 | struct ioc; |
| 225 | void * ccio_get_iommu(const struct parisc_device *dev); |
| 226 | int ccio_request_resource(const struct parisc_device *dev, |
| 227 | struct resource *res); |
| 228 | int ccio_allocate_resource(const struct parisc_device *dev, |
| 229 | struct resource *res, unsigned long size, |
| 230 | unsigned long min, unsigned long max, unsigned long align); |
| 231 | #else /* !CONFIG_IOMMU_CCIO */ |
| 232 | #define ccio_get_iommu(dev) NULL |
Ryan Bradetich | 328d968 | 2006-10-26 01:27:18 +0000 | [diff] [blame] | 233 | #define ccio_request_resource(dev, res) insert_resource(&iomem_resource, res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | #define ccio_allocate_resource(dev, res, size, min, max, align) \ |
| 235 | allocate_resource(&iomem_resource, res, size, min, max, \ |
| 236 | align, NULL, NULL) |
| 237 | #endif /* !CONFIG_IOMMU_CCIO */ |
| 238 | |
| 239 | #ifdef CONFIG_IOMMU_SBA |
| 240 | struct parisc_device; |
| 241 | void * sba_get_iommu(struct parisc_device *dev); |
| 242 | #endif |
| 243 | |
| 244 | /* At the moment, we panic on error for IOMMU resource exaustion */ |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 245 | #define dma_mapping_error(dev, x) 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | #endif |