70 lines
3.0 KiB
C
70 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved
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*
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* DMA operations that map physical memory through IOMMU.
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*/
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#ifndef _LINUX_IOMMU_DMA_H
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#define _LINUX_IOMMU_DMA_H
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#include <linux/dma-direction.h>
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#ifdef CONFIG_IOMMU_DMA
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static inline bool use_dma_iommu(struct device *dev)
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{
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return dev->dma_iommu;
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}
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#else
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static inline bool use_dma_iommu(struct device *dev)
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{
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return false;
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}
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#endif /* CONFIG_IOMMU_DMA */
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dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size, enum dma_data_direction dir,
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unsigned long attrs);
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void iommu_dma_unmap_page(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction dir, unsigned long attrs);
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int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction dir, unsigned long attrs);
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void iommu_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction dir, unsigned long attrs);
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void *iommu_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
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gfp_t gfp, unsigned long attrs);
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int iommu_dma_mmap(struct device *dev, struct vm_area_struct *vma,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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unsigned long attrs);
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int iommu_dma_get_sgtable(struct device *dev, struct sg_table *sgt,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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unsigned long attrs);
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unsigned long iommu_dma_get_merge_boundary(struct device *dev);
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size_t iommu_dma_opt_mapping_size(void);
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size_t iommu_dma_max_mapping_size(struct device *dev);
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void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t handle, unsigned long attrs);
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dma_addr_t iommu_dma_map_resource(struct device *dev, phys_addr_t phys,
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size_t size, enum dma_data_direction dir, unsigned long attrs);
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void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle,
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size_t size, enum dma_data_direction dir, unsigned long attrs);
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struct sg_table *iommu_dma_alloc_noncontiguous(struct device *dev, size_t size,
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enum dma_data_direction dir, gfp_t gfp, unsigned long attrs);
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void iommu_dma_free_noncontiguous(struct device *dev, size_t size,
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struct sg_table *sgt, enum dma_data_direction dir);
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void *iommu_dma_vmap_noncontiguous(struct device *dev, size_t size,
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struct sg_table *sgt);
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#define iommu_dma_vunmap_noncontiguous(dev, vaddr) \
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vunmap(vaddr);
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int iommu_dma_mmap_noncontiguous(struct device *dev, struct vm_area_struct *vma,
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size_t size, struct sg_table *sgt);
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void iommu_dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction dir);
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void iommu_dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction dir);
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void iommu_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl,
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int nelems, enum dma_data_direction dir);
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void iommu_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
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int nelems, enum dma_data_direction dir);
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#endif /* _LINUX_IOMMU_DMA_H */
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