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Commit c02add3f authored by Prakash Gupta's avatar Prakash Gupta
Browse files

iommu: arm-smmu: domain power on arm_smmu_map/map_sg 



Enable domain power in arm_smmu_map/map_sg. This is not required with QGKI
kernel due to downstream fixes. So limit the domain power enable only for
QGKI build.
Add config ARM_SMMU_SKIP_MAP_POWER_ON to limit this for specific targets.

Change-Id: I299666da1b812fc3dd06960e75ddd1fb08e9a8d0
Signed-off-by: default avatarPrakash Gupta <guptap@codeaurora.org>
parent bac14d76

arch/arm/configs/vendor/sdxlemur.config

+1 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ CONFIG_IOMMU_DYNAMIC_DOMAINS=y 
CONFIG_IOMMU_IO_PGTABLE_FAST=y

CONFIG_QCOM_IOMMU_IO_PGTABLE_QUIRKS=y

CONFIG_IOMMU_LIMIT_IOVA_ALIGNMENT=y

CONFIG_ARM_SMMU_SKIP_MAP_POWER_ON=y

CONFIG_QTI_IOMMU_SUPPORT=y

CONFIG_QCOM_SCM=y

CONFIG_QCOM_SECURE_BUFFER=y

arch/arm64/configs/vendor/holi_QGKI.config

+1 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ CONFIG_QCOM_IOMMU_IO_PGTABLE_QUIRKS=y 
CONFIG_QCOM_LAZY_MAPPING=y

CONFIG_DEBUG_FS=y

CONFIG_IOMMU_DYNAMIC_DOMAINS=y

CONFIG_ARM_SMMU_SKIP_MAP_POWER_ON=y

CONFIG_QCOM_SECURE_BUFFER=y

# CONFIG_ZONE_DMA32 is not set

CONFIG_EDAC_KRYO_ARM64=y

arch/arm64/configs/vendor/lahaina_QGKI.config

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ CONFIG_STM_PROTO_BASIC=y 
CONFIG_ION_MSM_HEAPS=y

CONFIG_IOMMU_IO_PGTABLE_FAST=y

CONFIG_IOMMU_DYNAMIC_DOMAINS=y

CONFIG_ARM_SMMU_SKIP_MAP_POWER_ON=y

# CONFIG_IOMMU_IO_PGTABLE_FAST_SELFTEST is not set

# CONFIG_IOMMU_IO_PGTABLE_FAST_PROVE_TLB is not set

# CONFIG_SOFTLOCKUP_DETECTOR is not set

drivers/iommu/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -538,6 +538,16 @@ config ARM_SMMU_TESTBUS_DEBUGFS 
	  on an SMMU. This also exposes debugfs nodes to read testbus output

	  after the output has been selected.



config ARM_SMMU_SKIP_MAP_POWER_ON

	bool "Skip power on in map/map_sg path"

	depends on ARM_SMMU && QGKI

	help

	  Support for skipping domain power on in arm_smmu_map/map_sg path.

	  This is required to be enabled if no tlb flush needs to be performed

	  in map/map_sg path.



	  If unsure, say N here.



config ARM_SMMU_V3

	tristate "ARM Ltd. System MMU Version 3 (SMMUv3) Support"

	depends on ARM64

drivers/iommu/arm-smmu.c

+19 −0
Original line number Diff line number Diff line
@@ -3149,6 +3149,13 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova, 
		return PTR_ERR(ops);

	else if (!ops)

		return -EINVAL;



	if (!IS_ENABLED(CONFIG_ARM_SMMU_SKIP_MAP_POWER_ON)) {

		ret = arm_smmu_domain_power_on(domain, smmu_domain->smmu);

		if (ret)

			return ret;

	}



	iova = arm_smmu_mask_iova(smmu_domain, iova);

	arm_smmu_secure_domain_lock(smmu_domain);

	arm_smmu_rpm_get(smmu);
@@ -3174,6 +3181,9 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova, 


	}



	if (!IS_ENABLED(CONFIG_ARM_SMMU_SKIP_MAP_POWER_ON))

		arm_smmu_domain_power_off(domain, smmu_domain->smmu);



	arm_smmu_assign_table(smmu_domain);

	arm_smmu_secure_domain_unlock(smmu_domain);
@@ -3300,6 +3310,12 @@ static size_t arm_smmu_map_sg(struct iommu_domain *domain, unsigned long iova, 
		return 0;

	iova = arm_smmu_mask_iova(smmu_domain, iova);



	if (!IS_ENABLED(CONFIG_ARM_SMMU_SKIP_MAP_POWER_ON)) {

		ret = arm_smmu_domain_power_on(domain, smmu_domain->smmu);

		if (ret)

			return ret;

	}



	arm_smmu_secure_domain_lock(smmu_domain);



	__saved_iova_start = iova;
@@ -3357,6 +3373,9 @@ static size_t arm_smmu_map_sg(struct iommu_domain *domain, unsigned long iova, 
	}



out:

	if (!IS_ENABLED(CONFIG_ARM_SMMU_SKIP_MAP_POWER_ON))

		arm_smmu_domain_power_off(domain, smmu_domain->smmu);



	arm_smmu_assign_table(smmu_domain);

	arm_smmu_secure_domain_unlock(smmu_domain);