| Message ID | 9296d67c92ecbc5a6e33a1162d8f41149b2f551e.1747537752.git.nicolinc@nvidia.com |
|---|---|
| State | New |
| Headers | show |
| Series | iommufd: Add vIOMMU infrastructure (Part-4 HW QUEUE) | expand |
On Sat, May 17, 2025 at 08:21:41PM -0700, Nicolin Chen wrote: > 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(-) Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Jason
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)
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(-)