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Commit 0ae349a0 authored by Rob Clark's avatar Rob Clark Committed by Joerg Roedel
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iommu/qcom: Add qcom_iommu 



An iommu driver for Qualcomm "B" family devices which do implement the
ARM SMMU spec, but not in a way that is compatible with how the arm-smmu
driver is designed.  It seems SMMU_SCR1.GASRAE=1 so the global register
space is not accessible.  This means it needs to get configuration from
devicetree instead of setting it up dynamically.

In the end, other than register definitions, there is not much code to
share with arm-smmu (other than what has already been refactored out
into the pgtable helpers).

Signed-off-by: default avatarRob Clark <robdclark@gmail.com>
Tested-by: default avatarRiku Voipio <riku.voipio@linaro.org>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 2b03774b

drivers/iommu/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -367,4 +367,14 @@ config MTK_IOMMU_V1 


	  if unsure, say N here.



config QCOM_IOMMU

	# Note: iommu drivers cannot (yet?) be built as modules

	bool "Qualcomm IOMMU Support"

	depends on ARCH_QCOM || COMPILE_TEST

	select IOMMU_API

	select IOMMU_IO_PGTABLE_LPAE

	select ARM_DMA_USE_IOMMU

	help

	  Support for IOMMU on certain Qualcomm SoCs.



endif # IOMMU_SUPPORT

drivers/iommu/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -27,3 +27,4 @@ obj-$(CONFIG_TEGRA_IOMMU_SMMU) += tegra-smmu.o 
obj-$(CONFIG_EXYNOS_IOMMU) += exynos-iommu.o

obj-$(CONFIG_FSL_PAMU) += fsl_pamu.o fsl_pamu_domain.o

obj-$(CONFIG_S390_IOMMU) += s390-iommu.o

obj-$(CONFIG_QCOM_IOMMU) += qcom_iommu.o

drivers/iommu/qcom_iommu.c

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