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iommu/arm-smmu-v3-iommufd: Add hw_info to impl_ops

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This will be used by Tegra241 CMDQV implementation to report a non-default
HW info data.

Link: https://patch.msgid.link/r/8a3bf5709358eb21aed2e8434534c30ecf83917c.1752126748.git.nicolinc@nvidia.com
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Nicolin Chen 2025-07-09 22:59:16 -07:00 committed by Jason Gunthorpe
parent 61dd912ee0
commit 9eb6a666df
2 changed files with 13 additions and 2 deletions
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8
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c
View File

@ -11,13 +11,17 @@ void *arm_smmu_hw_info(struct device *dev, u32 *length,
enum iommu_hw_info_type *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)

7
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
View File

@ -721,6 +721,13 @@ struct arm_smmu_impl_ops {
int (*init_structures)(struct arm_smmu_device *smmu);
struct arm_smmu_cmdq *(*get_secondary_cmdq)(
struct arm_smmu_device *smmu, struct arm_smmu_cmdq_ent *ent);
/*
* An implementation should define its own type other than the default
* IOMMU_HW_INFO_TYPE_ARM_SMMUV3. And it must validate the input @type
* to return its own structure.
*/
void *(*hw_info)(struct arm_smmu_device *smmu, u32 *length,
enum iommu_hw_info_type *type);
const size_t vsmmu_size;
const enum iommu_viommu_type vsmmu_type;
int (*vsmmu_init)(struct arm_vsmmu *vsmmu,