[PATCH] rtc warning fix
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / dma-mapping.h
blobff203c465fed260f75de3c0d80a71e7d90f101d2
1 #ifndef _ASM_LINUX_DMA_MAPPING_H
2 #define _ASM_LINUX_DMA_MAPPING_H
4 #include <linux/device.h>
5 #include <linux/err.h>
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,
16 #define DMA_64BIT_MASK 0xffffffffffffffffULL
17 #define DMA_48BIT_MASK 0x0000ffffffffffffULL
18 #define DMA_40BIT_MASK 0x000000ffffffffffULL
19 #define DMA_39BIT_MASK 0x0000007fffffffffULL
20 #define DMA_32BIT_MASK 0x00000000ffffffffULL
21 #define DMA_31BIT_MASK 0x000000007fffffffULL
22 #define DMA_30BIT_MASK 0x000000003fffffffULL
23 #define DMA_29BIT_MASK 0x000000001fffffffULL
24 #define DMA_28BIT_MASK 0x000000000fffffffULL
25 #define DMA_24BIT_MASK 0x0000000000ffffffULL
27 static inline int valid_dma_direction(int dma_direction)
29 return ((dma_direction == DMA_BIDIRECTIONAL) ||
30 (dma_direction == DMA_TO_DEVICE) ||
31 (dma_direction == DMA_FROM_DEVICE));
34 #include <asm/dma-mapping.h>
36 /* Backwards compat, remove in 2.7.x */
37 #define dma_sync_single dma_sync_single_for_cpu
38 #define dma_sync_sg dma_sync_sg_for_cpu
40 extern u64 dma_get_required_mask(struct device *dev);
42 /* flags for the coherent memory api */
43 #define DMA_MEMORY_MAP 0x01
44 #define DMA_MEMORY_IO 0x02
45 #define DMA_MEMORY_INCLUDES_CHILDREN 0x04
46 #define DMA_MEMORY_EXCLUSIVE 0x08
48 #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
49 static inline int
50 dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
51 dma_addr_t device_addr, size_t size, int flags)
53 return 0;
56 static inline void
57 dma_release_declared_memory(struct device *dev)
61 static inline void *
62 dma_mark_declared_memory_occupied(struct device *dev,
63 dma_addr_t device_addr, size_t size)
65 return ERR_PTR(-EBUSY);
67 #endif
69 #endif