1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 /*
3 * Copyright (c) 2024, NVIDIA CORPORATION & AF
4 *
5 * DMA operations that map physical memory thr
6 */
7 #ifndef _LINUX_IOMMU_DMA_H
8 #define _LINUX_IOMMU_DMA_H
9
10 #include <linux/dma-direction.h>
11
12 #ifdef CONFIG_IOMMU_DMA
13 static inline bool use_dma_iommu(struct device
14 {
15 return dev->dma_iommu;
16 }
17 #else
18 static inline bool use_dma_iommu(struct device
19 {
20 return false;
21 }
22 #endif /* CONFIG_IOMMU_DMA */
23
24 dma_addr_t iommu_dma_map_page(struct device *d
25 unsigned long offset, size_t s
26 unsigned long attrs);
27 void iommu_dma_unmap_page(struct device *dev,
28 size_t size, enum dma_data_dir
29 int iommu_dma_map_sg(struct device *dev, struc
30 enum dma_data_direction dir, u
31 void iommu_dma_unmap_sg(struct device *dev, st
32 enum dma_data_direction dir, u
33 void *iommu_dma_alloc(struct device *dev, size
34 gfp_t gfp, unsigned long attrs
35 int iommu_dma_mmap(struct device *dev, struct
36 void *cpu_addr, dma_addr_t dma
37 unsigned long attrs);
38 int iommu_dma_get_sgtable(struct device *dev,
39 void *cpu_addr, dma_addr_t dma
40 unsigned long attrs);
41 unsigned long iommu_dma_get_merge_boundary(str
42 size_t iommu_dma_opt_mapping_size(void);
43 size_t iommu_dma_max_mapping_size(struct devic
44 void iommu_dma_free(struct device *dev, size_t
45 dma_addr_t handle, unsigned lo
46 dma_addr_t iommu_dma_map_resource(struct devic
47 size_t size, enum dma_data_dir
48 void iommu_dma_unmap_resource(struct device *d
49 size_t size, enum dma_data_dir
50 struct sg_table *iommu_dma_alloc_noncontiguous
51 enum dma_data_direction dir, g
52 void iommu_dma_free_noncontiguous(struct devic
53 struct sg_table *sgt, enum dma
54 void *iommu_dma_vmap_noncontiguous(struct devi
55 struct sg_table *sgt);
56 #define iommu_dma_vunmap_noncontiguous(dev, va
57 vunmap(vaddr);
58 int iommu_dma_mmap_noncontiguous(struct device
59 size_t size, struct sg_table *
60 void iommu_dma_sync_single_for_cpu(struct devi
61 size_t size, enum dma_data_dir
62 void iommu_dma_sync_single_for_device(struct d
63 size_t size, enum dma_data_dir
64 void iommu_dma_sync_sg_for_cpu(struct device *
65 int nelems, enum dma_data_dire
66 void iommu_dma_sync_sg_for_device(struct devic
67 int nelems, enum dma_data_dire
68
69 #endif /* _LINUX_IOMMU_DMA_H */
70
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.