Commit 4100b8c2 authored May 13, 2020 by Maxime Ripard Committed by Joerg Roedel May 14, 2020

iommu: Add Allwinner H6 IOMMU driver



The Allwinner H6 has introduced an IOMMU for a few DMA controllers, mostly
video related: the display engine, the video decoders / encoders, the
camera capture controller, etc.

The design is pretty simple compared to other IOMMUs found in SoCs: there's
a single instance, controlling all the masters, with a single address
space.

It also features a performance monitoring unit that allows to retrieve
various informations (per-master and global TLB accesses, hits and misses,
access latency, etc) that isn't supported at the moment.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/d122a8670361e36fc26b4ce2674a2223d30dc4cc.1589378833.git-series.maxime@cerno.tech


Signed-off-by: Joerg Roedel <jroedel@suse.de>

parent db7d3cbd

drivers/iommu/Kconfig

+9 −0

Original line number	Diff line number	Diff line
		@@ -303,6 +303,15 @@ config ROCKCHIP_IOMMU
		Say Y here if you are using a Rockchip SoC that includes an IOMMU
		device.

		config SUN50I_IOMMU
		bool "Allwinner H6 IOMMU Support"
		depends on ARCH_SUNXI \|\| COMPILE_TEST
		select ARM_DMA_USE_IOMMU
		select IOMMU_API
		select IOMMU_DMA
		help
		Support for the IOMMU introduced in the Allwinner H6 SoCs.

		config TEGRA_IOMMU_GART
		bool "Tegra GART IOMMU Support"
		depends on ARCH_TEGRA_2x_SOC

drivers/iommu/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@ obj-$(CONFIG_MTK_IOMMU_V1) += mtk_iommu_v1.o
		obj-$(CONFIG_OMAP_IOMMU) += omap-iommu.o
		obj-$(CONFIG_OMAP_IOMMU_DEBUG) += omap-iommu-debug.o
		obj-$(CONFIG_ROCKCHIP_IOMMU) += rockchip-iommu.o
		obj-$(CONFIG_SUN50I_IOMMU) += sun50i-iommu.o
		obj-$(CONFIG_TEGRA_IOMMU_GART) += tegra-gart.o
		obj-$(CONFIG_TEGRA_IOMMU_SMMU) += tegra-smmu.o
		obj-$(CONFIG_EXYNOS_IOMMU) += exynos-iommu.o

drivers/iommu/sun50i-iommu.c

0 → 100644

+1027 −0

File added.

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