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iommu: Use enum iommu_hw_info_type for type in hw_info op

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Replace u32 to make it clear. No functional changes.

Also simplify the kdoc since the type itself is clear enough.

Link: https://patch.msgid.link/r/651c50dee8ab900f691202ef0204cd5a43fdd6a2.1752126748.git.nicolinc@nvidia.com
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.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 22:58:56 -07:00 committed by Jason Gunthorpe
parent c50a5de2c4
commit 4b57c057f9
5 changed files with 11 additions and 7 deletions
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3
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-iommufd.c
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@ -7,7 +7,8 @@
#include "arm-smmu-v3.h"
void *arm_smmu_hw_info(struct device *dev, u32 *length, u32 *type)
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);
struct iommu_hw_info_arm_smmuv3 *info;

3
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
View File

@ -1033,7 +1033,8 @@ struct arm_vsmmu {
};
#if IS_ENABLED(CONFIG_ARM_SMMU_V3_IOMMUFD)
void *arm_smmu_hw_info(struct device *dev, u32 *length, u32 *type);
void *arm_smmu_hw_info(struct device *dev, u32 *length,
enum iommu_hw_info_type *type);
size_t arm_smmu_get_viommu_size(struct device *dev,
enum iommu_viommu_type viommu_type);
int arm_vsmmu_init(struct iommufd_viommu *viommu,

3
drivers/iommu/intel/iommu.c
View File

@ -4091,7 +4091,8 @@ static int intel_iommu_set_dev_pasid(struct iommu_domain *domain,
return ret;
}
static void *intel_iommu_hw_info(struct device *dev, u32 *length, u32 *type)
static void *intel_iommu_hw_info(struct device *dev, u32 *length,
enum iommu_hw_info_type *type)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct intel_iommu *iommu = info->iommu;

3
drivers/iommu/iommufd/selftest.c
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@ -287,7 +287,8 @@ static struct iommu_domain mock_blocking_domain = {
.ops = &mock_blocking_ops,
};
static void *mock_domain_hw_info(struct device *dev, u32 *length, u32 *type)
static void *mock_domain_hw_info(struct device *dev, u32 *length,
enum iommu_hw_info_type *type)
{
struct iommu_test_hw_info *info;

6
include/linux/iommu.h
View File

@ -563,8 +563,7 @@ iommu_copy_struct_from_full_user_array(void *kdst, size_t kdst_entry_size,
* @capable: check capability
* @hw_info: report iommu hardware information. The data buffer returned by this
* op is allocated in the iommu driver and freed by the caller after
* use. The information type is one of enum iommu_hw_info_type defined
* in include/uapi/linux/iommufd.h.
* use.
* @domain_alloc: Do not use in new drivers
* @domain_alloc_identity: allocate an IDENTITY domain. Drivers should prefer to
* use identity_domain instead. This should only be used
@ -623,7 +622,8 @@ iommu_copy_struct_from_full_user_array(void *kdst, size_t kdst_entry_size,
*/
struct iommu_ops {
bool (*capable)(struct device *dev, enum iommu_cap);
void *(*hw_info)(struct device *dev, u32 *length, u32 *type);
void *(*hw_info)(struct device *dev, u32 *length,
enum iommu_hw_info_type *type);
/* Domain allocation and freeing by the iommu driver */
#if IS_ENABLED(CONFIG_FSL_PAMU)