#ifndef _ASM_LINUX_DMA_MAPPING_H #define _ASM_LINUX_DMA_MAPPING_H #include <linux/device.h> #include <linux/err.h> /* These definitions mirror those in pci.h, so they can be used * interchangeably with their PCI_ counterparts */ enum dma_data_direction { DMA_BIDIRECTIONAL = 0, DMA_TO_DEVICE = 1, DMA_FROM_DEVICE = 2, DMA_NONE = 3, }; #define DMA_64BIT_MASK 0xffffffffffffffffULL #define DMA_48BIT_MASK 0x0000ffffffffffffULL #define DMA_40BIT_MASK 0x000000ffffffffffULL #define DMA_39BIT_MASK 0x0000007fffffffffULL #define DMA_32BIT_MASK 0x00000000ffffffffULL #define DMA_31BIT_MASK 0x000000007fffffffULL #define DMA_30BIT_MASK 0x000000003fffffffULL #define DMA_29BIT_MASK 0x000000001fffffffULL #define DMA_28BIT_MASK 0x000000000fffffffULL #define DMA_24BIT_MASK 0x0000000000ffffffULL static inline int valid_dma_direction(int dma_direction) { return ((dma_direction == DMA_BIDIRECTIONAL) || (dma_direction == DMA_TO_DEVICE) || (dma_direction == DMA_FROM_DEVICE)); } #include <asm/dma-mapping.h> /* Backwards compat, remove in 2.7.x */ #define dma_sync_single dma_sync_single_for_cpu #define dma_sync_sg dma_sync_sg_for_cpu extern u64 dma_get_required_mask(struct device *dev); /* flags for the coherent memory api */ #define DMA_MEMORY_MAP 0x01 #define DMA_MEMORY_IO 0x02 #define DMA_MEMORY_INCLUDES_CHILDREN 0x04 #define DMA_MEMORY_EXCLUSIVE 0x08 #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY static inline int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, dma_addr_t device_addr, size_t size, int flags) { return 0; } static inline void dma_release_declared_memory(struct device *dev) { } static inline void * dma_mark_declared_memory_occupied(struct device *dev, dma_addr_t device_addr, size_t size) { return ERR_PTR(-EBUSY); } #endif #endif