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8b80549f1b
Thanks to the somewhat asymmetrical nature, while removing iommu_setup_dma_ops() from the arch_setup_dma_ops() flow, I managed to forget that arm64's teardown path was also specific to iommu-dma. Clean that up to match, otherwise probe deferral will lead to the arch code erroneously removing DMA ops set elsewhere. Reported-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/linux-iommu/Zi_LV28TR-P-PzXi@eriador.lumag.spb.ru/ Fixes: b67483b3c44e ("iommu/dma: Centralise iommu_setup_dma_ops()") Signed-off-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> Acked-by: Will Deacon <will@kernel.org> Tested-by: Nicolin Chen <nicolinc@nvidia.com> Link: https://lore.kernel.org/r/d4cc20cbb0c45175e98dd76bf187e2ad6421296d.1714472573.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
// 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 <catalin.marinas@arm.com>
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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 <xen/xen.h>
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#include <asm/cacheflush.h>
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#include <asm/xen/xen-ops.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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unsigned long start = (unsigned long)phys_to_virt(paddr);
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dcache_clean_poc(start, start + size);
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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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unsigned long start = (unsigned long)phys_to_virt(paddr);
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if (dir == DMA_TO_DEVICE)
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return;
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dcache_inval_poc(start, start + size);
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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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unsigned long start = (unsigned long)page_address(page);
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dcache_clean_poc(start, start + size);
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}
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void arch_setup_dma_ops(struct device *dev, 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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xen_setup_dma_ops(dev);
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}
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