Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ASM_LINUX_DMA_MAPPING_H |
| 2 | #define _ASM_LINUX_DMA_MAPPING_H |
| 3 | |
| 4 | #include <linux/device.h> |
| 5 | #include <linux/err.h> |
| 6 | |
| 7 | /* These definitions mirror those in pci.h, so they can be used |
| 8 | * interchangeably with their PCI_ counterparts */ |
| 9 | enum dma_data_direction { |
| 10 | DMA_BIDIRECTIONAL = 0, |
| 11 | DMA_TO_DEVICE = 1, |
| 12 | DMA_FROM_DEVICE = 2, |
| 13 | DMA_NONE = 3, |
| 14 | }; |
| 15 | |
| 16 | #define DMA_64BIT_MASK 0xffffffffffffffffULL |
| 17 | #define DMA_32BIT_MASK 0x00000000ffffffffULL |
| 18 | |
| 19 | #include <asm/dma-mapping.h> |
| 20 | |
| 21 | /* Backwards compat, remove in 2.7.x */ |
| 22 | #define dma_sync_single dma_sync_single_for_cpu |
| 23 | #define dma_sync_sg dma_sync_sg_for_cpu |
| 24 | |
| 25 | extern u64 dma_get_required_mask(struct device *dev); |
| 26 | |
| 27 | /* flags for the coherent memory api */ |
| 28 | #define DMA_MEMORY_MAP 0x01 |
| 29 | #define DMA_MEMORY_IO 0x02 |
| 30 | #define DMA_MEMORY_INCLUDES_CHILDREN 0x04 |
| 31 | #define DMA_MEMORY_EXCLUSIVE 0x08 |
| 32 | |
| 33 | #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY |
| 34 | static inline int |
| 35 | dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, |
| 36 | dma_addr_t device_addr, size_t size, int flags) |
| 37 | { |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | static inline void |
| 42 | dma_release_declared_memory(struct device *dev) |
| 43 | { |
| 44 | } |
| 45 | |
| 46 | static inline void * |
| 47 | dma_mark_declared_memory_occupied(struct device *dev, |
| 48 | dma_addr_t device_addr, size_t size) |
| 49 | { |
| 50 | return ERR_PTR(-EBUSY); |
| 51 | } |
| 52 | #endif |
| 53 | |
| 54 | #endif |
| 55 | |
| 56 | |