http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/asm-generic/dma-mapping.h

/* Copyright (C) 2002 by James.Bottomley@HansenPartnership.com * * Implements the generic device dma API via the existing pci_ one * for unconverted architectures */ #ifndef _ASM_GENERIC_DMA_MAPPING_H #define _ASM_GENERIC_DMA_MAPPING_H #include <linux/config.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/mm.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_alloc_consistent(to_pci_dev(dev), size, dma_handle); } 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 static inline int dma_supported(struct device *dev, u64 mask) { return 0; } static inline int dma_set_mask(struct device *dev, u64 dma_mask) { BUG(); return 0; } static inline void * dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) { BUG(); return NULL; } static inline void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_handle) { BUG(); } 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; } static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, enum dma_data_direction direction) { BUG(); } 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; } static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, enum dma_data_direction direction) { BUG(); } static inline int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction direction) { BUG(); return 0; } static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, enum dma_data_direction direction) { BUG(); } 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(); } 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(); } static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, enum dma_data_direction direction) { BUG(); } static inline void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, enum dma_data_direction direction) { BUG(); } static inline int dma_error(dma_addr_t dma_addr) { return 0; } #endif /* 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) (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(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