diff options
Diffstat (limited to 'include/linux/dma-mapping.h')
| -rw-r--r-- | include/linux/dma-mapping.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h new file mode 100644 index 00000000000..806c305332c --- /dev/null +++ b/include/linux/dma-mapping.h @@ -0,0 +1,56 @@ +#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_32BIT_MASK 0x00000000ffffffffULL + +#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 + + |