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