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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Douglas AndersonandDanilo Krummrich
7fa1e85cfe
In C, bitfields are not necessarily safe to modify from multiple threads without locking. Switch "dma_iommu" over to the "flags" field so modifications are safe. Cc: Leon Romanovsky <leon@kernel.org> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Christoph Hellwig <hch@lst.de> Reviewed-by: Rafael J. Wysocki (Intel) <rafael@kernel.org> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://patch.msgid.link/20260406162231.v5.3.Id20d5973cbff542fea290e13177e9423f5d81342@changeid Signed-off-by: Danilo Krummrich <dakr@kernel.org>
66 lines
2.7 KiB
C
66 lines
2.7 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/device.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(dev);
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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_phys(struct device *dev, phys_addr_t phys, size_t size,
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enum dma_data_direction dir, unsigned long attrs);
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void iommu_dma_unmap_phys(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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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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