[PATCH v5 10/12] iommufd/selftest: Add a helper to get test device

Yi Liu
2024-11-04T13:25:24Z

There is need to get the selftest device (sobj->type == TYPE_IDEV) in
multiple places, so have a helper to for it.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/iommu/iommufd/selftest.c | 32 +++++++++++++++++++++-----------
1 file changed, 21 insertions(+), 11 deletions(-)

diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c
index 635d8246691d..bfd2c50f64ec 100644
--- a/drivers/iommu/iommufd/selftest.c
+++ b/drivers/iommu/iommufd/selftest.c
@@ -825,29 +825,39 @@ static int iommufd_test_mock_domain(struct iommufd_ucmd *ucmd,
return rc;
}

-/* Replace the mock domain with a manually allocated hw_pagetable */
-static int iommufd_test_mock_domain_replace(struct iommufd_ucmd *ucmd,
- unsigned int device_id, u32 pt_id,
- struct iommu_test_cmd *cmd)
+static struct selftest_obj *
+iommufd_test_get_self_test_device(struct iommufd_ctx *ictx, u32 id)
{
struct iommufd_object *dev_obj;
struct selftest_obj *sobj;
- int rc;

/*
* Prefer to use the OBJ_SELFTEST because the destroy_rwsem will ensure
* it doesn't race with detach, which is not allowed.
*/
- dev_obj =
- iommufd_get_object(ucmd->ictx, device_id, IOMMUFD_OBJ_SELFTEST);
+ dev_obj = iommufd_get_object(ictx, id, IOMMUFD_OBJ_SELFTEST);
if (IS_ERR(dev_obj))
- return PTR_ERR(dev_obj);
+ return ERR_CAST(dev_obj);

sobj = container_of(dev_obj, struct selftest_obj, obj);
if (sobj->type != TYPE_IDEV) {
- rc = -EINVAL;
- goto out_dev_obj;
+ iommufd_put_object(ictx, dev_obj);
+ return ERR_PTR(-EINVAL);
}
+ return sobj;
+}
+
+/* Replace the mock domain with a manually allocated hw_pagetable */
+static int iommufd_test_mock_domain_replace(struct iommufd_ucmd *ucmd,
+ unsigned int device_id, u32 pt_id,
+ struct iommu_test_cmd *cmd)
+{
+ struct selftest_obj *sobj;
+ int rc;
+
+ sobj = iommufd_test_get_self_test_device(ucmd->ictx, device_id);
+ if (IS_ERR(sobj))
+ return PTR_ERR(sobj);

rc = iommufd_device_replace(sobj->idev.idev, &pt_id);
if (rc)
@@ -857,7 +867,7 @@ static int iommufd_test_mock_domain_replace(struct iommufd_ucmd *ucmd,
rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd));

out_dev_obj:
- iommufd_put_object(ucmd->ictx, dev_obj);
+ iommufd_put_object(ucmd->ictx, &sobj->obj);
return rc;
}

--
2.34.1