diff options
Diffstat (limited to 'include/asm-sparc64/dma-mapping.h')
| -rw-r--r-- | include/asm-sparc64/dma-mapping.h | 337 |
1 files changed, 82 insertions, 255 deletions
diff --git a/include/asm-sparc64/dma-mapping.h b/include/asm-sparc64/dma-mapping.h index c58ec1661df8..0a1006692bb2 100644 --- a/include/asm-sparc64/dma-mapping.h +++ b/include/asm-sparc64/dma-mapping.h @@ -1,307 +1,134 @@ #ifndef _ASM_SPARC64_DMA_MAPPING_H #define _ASM_SPARC64_DMA_MAPPING_H - -#ifdef CONFIG_PCI - -/* we implement the API below in terms of the existing PCI one, - * so include it */ -#include <linux/pci.h> -/* need struct page definitions */ +#include <linux/scatterlist.h> #include <linux/mm.h> -#include <asm/of_device.h> - -static inline int -dma_supported(struct device *dev, u64 mask) -{ - BUG_ON(dev->bus != &pci_bus_type); - - return pci_dma_supported(to_pci_dev(dev), mask); -} - -static inline int -dma_set_mask(struct device *dev, u64 dma_mask) -{ - BUG_ON(dev->bus != &pci_bus_type); - - return pci_set_dma_mask(to_pci_dev(dev), dma_mask); -} - -static inline void * -dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, - gfp_t flag) -{ - BUG_ON(dev->bus != &pci_bus_type); - - return pci_iommu_ops->alloc_consistent(to_pci_dev(dev), size, dma_handle, flag); -} - -static inline void -dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, - dma_addr_t dma_handle) -{ - BUG_ON(dev->bus != &pci_bus_type); - - pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle); -} - -static inline dma_addr_t -dma_map_single(struct device *dev, void *cpu_addr, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction); -} - -static inline void -dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction); -} - -static inline dma_addr_t -dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction); -} - -static inline void -dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction); -} - -static inline int -dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction); -} - -static inline void -dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction); -} - -static inline void -dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle, - size, (int)direction); -} - -static inline void -dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle, - size, (int)direction); -} - -static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction); -} - -static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction direction) -{ - BUG_ON(dev->bus != &pci_bus_type); - - pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction); -} - -static inline int -dma_mapping_error(dma_addr_t dma_addr) -{ - return pci_dma_mapping_error(dma_addr); -} - -#else - -struct device; -struct page; -struct scatterlist; - -static inline int -dma_supported(struct device *dev, u64 mask) -{ - BUG(); - return 0; -} - -static inline int -dma_set_mask(struct device *dev, u64 dma_mask) -{ - BUG(); - return 0; -} +#define DMA_ERROR_CODE (~(dma_addr_t)0x0) + +struct dma_ops { + void *(*alloc_coherent)(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flag); + void (*free_coherent)(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_handle); + dma_addr_t (*map_single)(struct device *dev, void *cpu_addr, + size_t size, + enum dma_data_direction direction); + void (*unmap_single)(struct device *dev, dma_addr_t dma_addr, + size_t size, + enum dma_data_direction direction); + int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents, + enum dma_data_direction direction); + void (*unmap_sg)(struct device *dev, struct scatterlist *sg, + int nhwentries, + enum dma_data_direction direction); + void (*sync_single_for_cpu)(struct device *dev, + dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction); + void (*sync_single_for_device)(struct device *dev, + dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction); + void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg, + int nelems, + enum dma_data_direction direction); + void (*sync_sg_for_device)(struct device *dev, struct scatterlist *sg, + int nelems, + enum dma_data_direction direction); +}; +extern const struct dma_ops *dma_ops; + +extern int dma_supported(struct device *dev, u64 mask); +extern int dma_set_mask(struct device *dev, u64 dma_mask); static inline void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag) + dma_addr_t *dma_handle, gfp_t flag) { - BUG(); - return NULL; + return dma_ops->alloc_coherent(dev, size, dma_handle, flag); } static inline void dma_free_coherent(struct device *dev, size_t size, - void *vaddr, dma_addr_t dma_handle) + void *cpu_addr, dma_addr_t dma_handle) { - BUG(); + dma_ops->free_coherent(dev, size, cpu_addr, dma_handle); } -static inline dma_addr_t -dma_map_single(struct device *dev, void *cpu_addr, size_t size, - enum dma_data_direction direction) +static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr, + size_t size, + enum dma_data_direction direction) { - BUG(); - return 0; + return dma_ops->map_single(dev, cpu_addr, size, direction); } -static inline void -dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, - enum dma_data_direction direction) +static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, + size_t size, + enum dma_data_direction direction) { - BUG(); + dma_ops->unmap_single(dev, dma_addr, size, direction); } -static inline dma_addr_t -dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction direction) +static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction direction) { - BUG(); - return 0; + return dma_ops->map_single(dev, page_address(page) + offset, + size, direction); } -static inline void -dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, - enum dma_data_direction direction) +static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, + size_t size, + enum dma_data_direction direction) { - BUG(); + dma_ops->unmap_single(dev, dma_address, size, direction); } -static inline int -dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction direction) +static inline int dma_map_sg(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction direction) { - BUG(); - return 0; + return dma_ops->map_sg(dev, sg, nents, direction); } -static inline void -dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, - enum dma_data_direction direction) +static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction direction) { - BUG(); + dma_ops->unmap_sg(dev, sg, nents, direction); } -static inline void -dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) +static inline void dma_sync_single_for_cpu(struct device *dev, + dma_addr_t dma_handle, size_t size, + enum dma_data_direction direction) { - BUG(); + dma_ops->sync_single_for_cpu(dev, dma_handle, size, direction); } -static inline void -dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, - enum dma_data_direction direction) +static inline void dma_sync_single_for_device(struct device *dev, + dma_addr_t dma_handle, + size_t size, + enum dma_data_direction direction) { - BUG(); + dma_ops->sync_single_for_device(dev, dma_handle, size, direction); } -static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction direction) +static inline void dma_sync_sg_for_cpu(struct device *dev, + struct scatterlist *sg, int nelems, + enum dma_data_direction direction) { - BUG(); + dma_ops->sync_sg_for_cpu(dev, sg, nelems, direction); } -static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction direction) +static inline void dma_sync_sg_for_device(struct device *dev, + struct scatterlist *sg, int nelems, + enum dma_data_direction direction) { - BUG(); + dma_ops->sync_sg_for_device(dev, sg, nelems, direction); } -static inline int -dma_mapping_error(dma_addr_t dma_addr) +static inline int dma_mapping_error(dma_addr_t dma_addr) { - BUG(); - return 0; + return (dma_addr == DMA_ERROR_CODE); } -#endif /* PCI */ - - -/* Now for the API extensions over the pci_ one */ - #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) #define dma_is_consistent(d, h) (1) -static inline int -dma_get_cache_alignment(void) -{ - /* no easy way to get cache size on all processors, so return - * the maximum possible, to be safe */ - return (1 << INTERNODE_CACHE_SHIFT); -} - -static inline void -dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, - unsigned long offset, size_t size, - enum dma_data_direction direction) -{ - /* just sync everything, that's all the pci API can do */ - dma_sync_single_for_cpu(dev, dma_handle, offset+size, direction); -} - -static inline void -dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, - unsigned long offset, size_t size, - enum dma_data_direction direction) -{ - /* just sync everything, that's all the pci API can do */ - dma_sync_single_for_device(dev, dma_handle, offset+size, direction); -} - -static inline void -dma_cache_sync(struct device *dev, void *vaddr, size_t size, - enum dma_data_direction direction) -{ - /* could define this in terms of the dma_cache ... operations, - * but if you get this on a platform, you should convert the platform - * to using the generic device DMA API */ - BUG(); -} - #endif /* _ASM_SPARC64_DMA_MAPPING_H */ |