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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Jul 2021 19:32:25.7387 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ba9b1b49-1b21-43d5-6ab6-08d94e1099ec X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.36];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT059.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR1201MB2467 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nate Watterson Copy the arm-smmu driver's infrastructure for handling implementation specific details outside the flow of architectural code. Signed-off-by: Nate Watterson Signed-off-by: Nicolin Chen --- drivers/iommu/arm/arm-smmu-v3/Makefile | 2 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-impl.c | 8 ++++++++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 4 ++++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 4 ++++ 4 files changed, 17 insertions(+), 1 deletion(-) create mode 100644 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-impl.c diff --git a/drivers/iommu/arm/arm-smmu-v3/Makefile b/drivers/iommu/arm/arm-smmu-v3/Makefile index 54feb1ecccad..1f5838d3351b 100644 --- a/drivers/iommu/arm/arm-smmu-v3/Makefile +++ b/drivers/iommu/arm/arm-smmu-v3/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_ARM_SMMU_V3) += arm_smmu_v3.o -arm_smmu_v3-objs-y += arm-smmu-v3.o +arm_smmu_v3-objs-y += arm-smmu-v3.o arm-smmu-v3-impl.o arm_smmu_v3-objs-$(CONFIG_ARM_SMMU_V3_SVA) += arm-smmu-v3-sva.o arm_smmu_v3-objs := $(arm_smmu_v3-objs-y) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-impl.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-impl.c new file mode 100644 index 000000000000..6947d28067a8 --- /dev/null +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-impl.c @@ -0,0 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include "arm-smmu-v3.h" + +struct arm_smmu_device *arm_smmu_v3_impl_init(struct arm_smmu_device *smmu) +{ + return smmu; +} diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 235f9bdaeaf2..b2d23de2b207 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -3771,6 +3771,10 @@ static int arm_smmu_device_probe(struct platform_device *pdev) return ret; } + smmu = arm_smmu_v3_impl_init(smmu); + if (IS_ERR(smmu)) + return PTR_ERR(smmu); + /* Set bypass mode according to firmware probing result */ bypass = !!ret; diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h index 4cb136f07914..4c60ba14221b 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -806,4 +806,8 @@ static inline u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle) static inline void arm_smmu_sva_notifier_synchronize(void) {} #endif /* CONFIG_ARM_SMMU_V3_SVA */ + +/* Implementation details */ +struct arm_smmu_device *arm_smmu_v3_impl_init(struct arm_smmu_device *smmu); + #endif /* _ARM_SMMU_V3_H */ -- 2.17.1