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31 lines
850 B
Diff
31 lines
850 B
Diff
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From 02a412de18479449c87ed7a332e3fe33d2eff3a4 Mon Sep 17 00:00:00 2001
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From: Samuel Holland <samuel@sholland.org>
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Date: Wed, 27 Apr 2022 18:47:53 -0500
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Subject: [PATCH 010/117] riscv: mm: Use IOMMU for DMA when available
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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---
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arch/riscv/mm/dma-noncoherent.c | 4 ++++
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1 file changed, 4 insertions(+)
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--- a/arch/riscv/mm/dma-noncoherent.c
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+++ b/arch/riscv/mm/dma-noncoherent.c
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@@ -7,6 +7,7 @@
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#include <linux/dma-direct.h>
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#include <linux/dma-map-ops.h>
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+#include <linux/iommu.h>
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#include <linux/mm.h>
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#include <asm/cacheflush.h>
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@@ -70,6 +71,9 @@ void arch_setup_dma_ops(struct device *d
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dev_driver_string(dev), dev_name(dev));
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dev->dma_coherent = coherent;
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+
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+ if (iommu)
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+ iommu_setup_dma_ops(dev, dma_base, dma_base + size - 1);
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}
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void riscv_noncoherent_supported(void)
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