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59 lines
1.4 KiB
59 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2012 ARM Ltd. |
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* Author: Catalin Marinas <[email protected]> |
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*/ |
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#include <linux/gfp.h> |
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#include <linux/cache.h> |
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#include <linux/dma-map-ops.h> |
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#include <linux/dma-iommu.h> |
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#include <xen/xen.h> |
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#include <xen/swiotlb-xen.h> |
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#include <asm/cacheflush.h> |
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void arch_sync_dma_for_device(phys_addr_t paddr, size_t size, |
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enum dma_data_direction dir) |
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{ |
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__dma_map_area(phys_to_virt(paddr), size, dir); |
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} |
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void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size, |
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enum dma_data_direction dir) |
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{ |
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__dma_unmap_area(phys_to_virt(paddr), size, dir); |
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} |
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void arch_dma_prep_coherent(struct page *page, size_t size) |
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{ |
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__dma_flush_area(page_address(page), size); |
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} |
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#ifdef CONFIG_IOMMU_DMA |
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void arch_teardown_dma_ops(struct device *dev) |
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{ |
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dev->dma_ops = NULL; |
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} |
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#endif |
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void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, |
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const struct iommu_ops *iommu, bool coherent) |
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{ |
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int cls = cache_line_size_of_cpu(); |
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WARN_TAINT(!coherent && cls > ARCH_DMA_MINALIGN, |
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TAINT_CPU_OUT_OF_SPEC, |
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"%s %s: ARCH_DMA_MINALIGN smaller than CTR_EL0.CWG (%d < %d)", |
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dev_driver_string(dev), dev_name(dev), |
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ARCH_DMA_MINALIGN, cls); |
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dev->dma_coherent = coherent; |
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if (iommu) |
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iommu_setup_dma_ops(dev, dma_base, size); |
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#ifdef CONFIG_XEN |
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if (xen_initial_domain()) |
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dev->dma_ops = &xen_swiotlb_dma_ops; |
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#endif |
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}
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