diff mbox series

[v5,24/29] iommu/arm-smmu-v3-iommufd: Add hw_info to impl_ops

Message ID 9296d67c92ecbc5a6e33a1162d8f41149b2f551e.1747537752.git.nicolinc@nvidia.com
State New
Headers show
Series None | expand

Commit Message

Nicolin Chen May 18, 2025, 3:21 a.m. UTC 
This will be used by Tegra241 CMDQV implementation to report a non-default
HW info data.

Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h         | 1 +
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 8 ++++++--
 2 files changed, 7 insertions(+), 2 deletions(-)
diff mbox series

Patch

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 a455ff97e53e..8328c8cc1899 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
@@ -727,6 +727,7 @@  struct arm_smmu_impl_ops {
 		struct arm_smmu_domain *smmu_domain, struct iommufd_ucmd *ucmd,
 		unsigned int viommu_type,
 		const struct iommu_user_data *user_data);
+	void *(*hw_info)(struct arm_smmu_device *smmu, u32 *length, u32 *type);
 };
 
 /* An SMMUv3 instance */
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c
index 8a13d0102c05..837f15e2d40f 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c
@@ -10,13 +10,17 @@ 
 void *arm_smmu_hw_info(struct device *dev, u32 *length, u32 *type)
 {
 	struct arm_smmu_master *master = dev_iommu_priv_get(dev);
+	const struct arm_smmu_impl_ops *impl_ops = master->smmu->impl_ops;
 	struct iommu_hw_info_arm_smmuv3 *info;
 	u32 __iomem *base_idr;
 	unsigned int i;
 
 	if (*type != IOMMU_HW_INFO_TYPE_DEFAULT &&
-	    *type != IOMMU_HW_INFO_TYPE_ARM_SMMUV3)
-		return ERR_PTR(-EOPNOTSUPP);
+	    *type != IOMMU_HW_INFO_TYPE_ARM_SMMUV3) {
+		if (!impl_ops || !impl_ops->hw_info)
+			return ERR_PTR(-EOPNOTSUPP);
+		return impl_ops->hw_info(master->smmu, length, type);
+	}
 
 	info = kzalloc(sizeof(*info), GFP_KERNEL);
 	if (!info)