| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|
| 2 | /* |
|---|
| 3 | * Copyright (c) 2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved |
|---|
| 4 | * |
|---|
| 5 | * DMA operations that map physical memory through IOMMU. |
|---|
| 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 *dev) |
|---|
| 14 | { |
|---|
| 15 | return dev->dma_iommu; |
|---|
| 16 | } |
|---|
| 17 | #else |
|---|
| 18 | static inline bool use_dma_iommu(struct device *dev) |
|---|
| 19 | { |
|---|
| 20 | return false; |
|---|
| 21 | } |
|---|
| 22 | #endif /* CONFIG_IOMMU_DMA */ |
|---|
| 23 | |
|---|
| 24 | dma_addr_t iommu_dma_map_phys(struct device *dev, phys_addr_t phys, size_t size, |
|---|
| 25 | enum dma_data_direction dir, unsigned long attrs); |
|---|
| 26 | void iommu_dma_unmap_phys(struct device *dev, dma_addr_t dma_handle, |
|---|
| 27 | size_t size, enum dma_data_direction dir, unsigned long attrs); |
|---|
| 28 | int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, |
|---|
| 29 | enum dma_data_direction dir, unsigned long attrs); |
|---|
| 30 | void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents, |
|---|
| 31 | enum dma_data_direction dir, unsigned long attrs); |
|---|
| 32 | void *iommu_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, |
|---|
| 33 | gfp_t gfp, unsigned long attrs); |
|---|
| 34 | int iommu_dma_mmap(struct device *dev, struct vm_area_struct *vma, |
|---|
| 35 | void *cpu_addr, dma_addr_t dma_addr, size_t size, |
|---|
| 36 | unsigned long attrs); |
|---|
| 37 | int iommu_dma_get_sgtable(struct device *dev, struct sg_table *sgt, |
|---|
| 38 | void *cpu_addr, dma_addr_t dma_addr, size_t size, |
|---|
| 39 | unsigned long attrs); |
|---|
| 40 | unsigned long iommu_dma_get_merge_boundary(struct device *dev); |
|---|
| 41 | size_t iommu_dma_opt_mapping_size(void); |
|---|
| 42 | size_t iommu_dma_max_mapping_size(struct device *dev); |
|---|
| 43 | void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr, |
|---|
| 44 | dma_addr_t handle, unsigned long attrs); |
|---|
| 45 | struct sg_table *iommu_dma_alloc_noncontiguous(struct device *dev, size_t size, |
|---|
| 46 | enum dma_data_direction dir, gfp_t gfp, unsigned long attrs); |
|---|
| 47 | void iommu_dma_free_noncontiguous(struct device *dev, size_t size, |
|---|
| 48 | struct sg_table *sgt, enum dma_data_direction dir); |
|---|
| 49 | void *iommu_dma_vmap_noncontiguous(struct device *dev, size_t size, |
|---|
| 50 | struct sg_table *sgt); |
|---|
| 51 | #define iommu_dma_vunmap_noncontiguous(dev, vaddr) \ |
|---|
| 52 | vunmap(vaddr); |
|---|
| 53 | int iommu_dma_mmap_noncontiguous(struct device *dev, struct vm_area_struct *vma, |
|---|
| 54 | size_t size, struct sg_table *sgt); |
|---|
| 55 | void iommu_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, |
|---|
| 56 | size_t size, enum dma_data_direction dir); |
|---|
| 57 | void iommu_dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, |
|---|
| 58 | size_t size, enum dma_data_direction dir); |
|---|
| 59 | void iommu_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl, |
|---|
| 60 | int nelems, enum dma_data_direction dir); |
|---|
| 61 | void iommu_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, |
|---|
| 62 | int nelems, enum dma_data_direction dir); |
|---|
| 63 | |
|---|
| 64 | #endif /* _LINUX_IOMMU_DMA_H */ |
|---|
| 65 | |
|---|
