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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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2 | #ifndef _LINUX_DMA_MAPPING_H |
3 | #define _LINUX_DMA_MAPPING_H |
4 | |
5 | #ifdef CONFIG_HAS_DMA |
6 | # error Virtio userspace code does not support CONFIG_HAS_DMA |
7 | #endif |
8 | |
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_alloc_coherent(d, s, hp, f) ({ \ |
17 | void *__dma_alloc_coherent_p = kmalloc((s), (f)); \ |
18 | *(hp) = (unsigned long)__dma_alloc_coherent_p; \ |
19 | __dma_alloc_coherent_p; \ |
20 | }) |
21 | |
22 | #define dma_free_coherent(d, s, p, h) kfree(p) |
23 | |
24 | #define dma_map_page(d, p, o, s, dir) (page_to_phys(p) + (o)) |
25 | |
26 | #define dma_map_single(d, p, s, dir) (virt_to_phys(p)) |
27 | #define dma_map_single_attrs(d, p, s, dir, a) (virt_to_phys(p)) |
28 | #define dma_mapping_error(...) (0) |
29 | |
30 | #define dma_unmap_single(d, a, s, r) do { (void)(d); (void)(a); (void)(s); (void)(r); } while (0) |
31 | #define dma_unmap_page(d, a, s, r) do { (void)(d); (void)(a); (void)(s); (void)(r); } while (0) |
32 | |
33 | #define sg_dma_address(sg) (0) |
34 | #define dma_need_sync(v, a) (0) |
35 | #define dma_unmap_single_attrs(d, a, s, r, t) do { \ |
36 | (void)(d); (void)(a); (void)(s); (void)(r); (void)(t); \ |
37 | } while (0) |
38 | #define dma_sync_single_range_for_cpu(d, a, o, s, r) do { \ |
39 | (void)(d); (void)(a); (void)(o); (void)(s); (void)(r); \ |
40 | } while (0) |
41 | #define dma_sync_single_range_for_device(d, a, o, s, r) do { \ |
42 | (void)(d); (void)(a); (void)(o); (void)(s); (void)(r); \ |
43 | } while (0) |
44 | #define dma_max_mapping_size(...) SIZE_MAX |
45 | |
46 | #endif |
47 |
Warning: This file is not a C or C++ file. It does not have highlighting.