1 #ifndef _PARISC_DMA_MAPPING_H
2 #define _PARISC_DMA_MAPPING_H
5 #include <asm/cacheflush.h>
6 #include <asm/scatterlist.h>
8 /* See Documentation/DMA-mapping.txt */
10 int (*dma_supported)(struct device *dev, u64 mask);
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);
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);
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
35 ** PA-7[13]00LC processors have a GSC bus interface and no I/O MMU.
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.
43 extern struct hppa_dma_ops pcxl_dma_ops;
44 extern struct hppa_dma_ops pcx_dma_ops;
47 extern struct hppa_dma_ops *hppa_dma_ops;
50 dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
53 return hppa_dma_ops->alloc_consistent(dev, size, dma_handle, flag);
57 dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
60 return hppa_dma_ops->alloc_noncoherent(dev, size, dma_handle, flag);
64 dma_free_coherent(struct device *dev, size_t size,
65 void *vaddr, dma_addr_t dma_handle)
67 hppa_dma_ops->free_consistent(dev, size, vaddr, dma_handle);
71 dma_free_noncoherent(struct device *dev, size_t size,
72 void *vaddr, dma_addr_t dma_handle)
74 hppa_dma_ops->free_consistent(dev, size, vaddr, dma_handle);
77 static inline dma_addr_t
78 dma_map_single(struct device *dev, void *ptr, size_t size,
79 enum dma_data_direction direction)
81 return hppa_dma_ops->map_single(dev, ptr, size, direction);
85 dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
86 enum dma_data_direction direction)
88 hppa_dma_ops->unmap_single(dev, dma_addr, size, direction);
92 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
93 enum dma_data_direction direction)
95 return hppa_dma_ops->map_sg(dev, sg, nents, direction);
99 dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
100 enum dma_data_direction direction)
102 hppa_dma_ops->unmap_sg(dev, sg, nhwentries, direction);
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)
109 return dma_map_single(dev, (page_address(page) + (offset)), size, direction);
113 dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
114 enum dma_data_direction direction)
116 dma_unmap_single(dev, dma_address, size, direction);
121 dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
122 enum dma_data_direction direction)
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);
129 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
130 enum dma_data_direction direction)
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);
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)
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);
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)
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);
155 dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
156 enum dma_data_direction direction)
158 if(hppa_dma_ops->dma_sync_sg_for_cpu)
159 hppa_dma_ops->dma_sync_sg_for_cpu(dev, sg, nelems, direction);
163 dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
164 enum dma_data_direction direction)
166 if(hppa_dma_ops->dma_sync_sg_for_device)
167 hppa_dma_ops->dma_sync_sg_for_device(dev, sg, nelems, direction);
171 dma_supported(struct device *dev, u64 mask)
173 return hppa_dma_ops->dma_supported(dev, mask);
177 dma_set_mask(struct device *dev, u64 mask)
179 if(!dev->dma_mask || !dma_supported(dev, mask))
182 *dev->dma_mask = mask;
188 dma_get_cache_alignment(void)
190 return dcache_stride;
194 dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
196 return (hppa_dma_ops->dma_sync_single_for_cpu == NULL);
200 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
201 enum dma_data_direction direction)
203 if(hppa_dma_ops->dma_sync_single_for_cpu)
204 flush_kernel_dcache_range((unsigned long)vaddr, size);
208 parisc_walk_tree(struct device *dev)
210 struct device *otherdev;
211 if(likely(dev->platform_data != NULL))
212 return dev->platform_data;
213 /* OK, just traverse the bus to find it */
214 for(otherdev = dev->parent; otherdev;
215 otherdev = otherdev->parent) {
216 if(otherdev->platform_data) {
217 dev->platform_data = otherdev->platform_data;
221 BUG_ON(!dev->platform_data);
222 return dev->platform_data;
225 #define GET_IOC(dev) (HBA_DATA(parisc_walk_tree(dev))->iommu);
228 #ifdef CONFIG_IOMMU_CCIO
229 struct parisc_device;
231 void * ccio_get_iommu(const struct parisc_device *dev);
232 int ccio_request_resource(const struct parisc_device *dev,
233 struct resource *res);
234 int ccio_allocate_resource(const struct parisc_device *dev,
235 struct resource *res, unsigned long size,
236 unsigned long min, unsigned long max, unsigned long align);
237 #else /* !CONFIG_IOMMU_CCIO */
238 #define ccio_get_iommu(dev) NULL
239 #define ccio_request_resource(dev, res) insert_resource(&iomem_resource, res)
240 #define ccio_allocate_resource(dev, res, size, min, max, align) \
241 allocate_resource(&iomem_resource, res, size, min, max, \
243 #endif /* !CONFIG_IOMMU_CCIO */
245 #ifdef CONFIG_IOMMU_SBA
246 struct parisc_device;
247 void * sba_get_iommu(struct parisc_device *dev);
250 /* At the moment, we panic on error for IOMMU resource exaustion */
251 #define dma_mapping_error(dev, x) 0