Merge tag 'sti-dt-fixes-for-v4.8-rcs' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / tools / virtio / linux / dma-mapping.h
1 #ifndef _LINUX_DMA_MAPPING_H
2 #define _LINUX_DMA_MAPPING_H
3
4 #ifdef CONFIG_HAS_DMA
5 # error Virtio userspace code does not support CONFIG_HAS_DMA
6 #endif
7
8 #define PCI_DMA_BUS_IS_PHYS 1
9
10 enum dma_data_direction {
11 DMA_BIDIRECTIONAL = 0,
12 DMA_TO_DEVICE = 1,
13 DMA_FROM_DEVICE = 2,
14 DMA_NONE = 3,
15 };
16
17 #define dma_alloc_coherent(d, s, hp, f) ({ \
18 void *__dma_alloc_coherent_p = kmalloc((s), (f)); \
19 *(hp) = (unsigned long)__dma_alloc_coherent_p; \
20 __dma_alloc_coherent_p; \
21 })
22
23 #define dma_free_coherent(d, s, p, h) kfree(p)
24
25 #define dma_map_page(d, p, o, s, dir) (page_to_phys(p) + (o))
26
27 #define dma_map_single(d, p, s, dir) (virt_to_phys(p))
28 #define dma_mapping_error(...) (0)
29
30 #define dma_unmap_single(...) do { } while (0)
31 #define dma_unmap_page(...) do { } while (0)
32
33 #endif
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