iommu/exynos: Add iommu driver for EXYNOS Platforms (2a96536e) · Commits · 戴 / test

This is the System MMU driver and IOMMU API implementation for EXYNOS SoC platforms. EXYNOS platforms has more than 10 System MMUs dedicated for each multimedia accelerators. The System MMU driver is already in arc/arm/plat-s5p but it is moved to drivers/iommu due to Ohad Ben-Cohen gathered IOMMU drivers there. Any device driver in EXYNOS platforms that needs to control its System MMU must call platform_set_sysmmu() to inform System MMU driver who will control it. platform_set_sysmmu() is defined in <mach/sysmmu.h> Signed-off-by:

KyongHo Cho <pullip.cho@samsung.com> Acked-by:

Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:

Kukjin Kim <kgene.kim@samsung.com>

drivers/iommu/Kconfig

+21 −0

Original line number	Diff line number	Diff line
		@@ -162,4 +162,25 @@ config TEGRA_IOMMU_SMMU
		space through the SMMU (System Memory Management Unit)
		hardware included on Tegra SoCs.

		config EXYNOS_IOMMU
		bool "Exynos IOMMU Support"
		depends on ARCH_EXYNOS && EXYNOS_DEV_SYSMMU
		select IOMMU_API
		help
		Support for the IOMMU(System MMU) of Samsung Exynos application
		processor family. This enables H/W multimedia accellerators to see
		non-linear physical memory chunks as a linear memory in their
		address spaces

		If unsure, say N here.

		config EXYNOS_IOMMU_DEBUG
		bool "Debugging log for Exynos IOMMU"
		depends on EXYNOS_IOMMU
		help
		Select this to see the detailed log message that shows what
		happens in the IOMMU driver

		Say N unless you need kernel log message for IOMMU debugging

		endif # IOMMU_SUPPORT

drivers/iommu/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -10,3 +10,4 @@ obj-$(CONFIG_OMAP_IOVMM) += omap-iovmm.o
		obj-$(CONFIG_OMAP_IOMMU_DEBUG) += omap-iommu-debug.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/exynos-iommu.c

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+1076 −0

File added.

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