[PATCH v3 4/7] iommufd/selftest: Add set_dev_pasid and remove_dev_pasid in mock iommu

[Yi Liu <yi.l.liu@xxxxxxxxx>]

The two callbacks are needed to make pasid_attach/detach path complete for
mock device. A nop is enough for set_dev_pasid, a domain type check in the
remove_dev_pasid is also helpful.

Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx>
---
 drivers/iommu/iommufd/selftest.c | 39 ++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c
index 7a2199470f31..1404eca156a8 100644
--- a/drivers/iommu/iommufd/selftest.c
+++ b/drivers/iommu/iommufd/selftest.c
@@ -514,6 +514,30 @@ static struct iommu_device *mock_probe_device(struct device *dev)
 	return &mock_iommu_device;
 }
 
+static void mock_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid,
+					struct iommu_domain *domain)
+{
+	/* Domain type specific cleanup: */
+	if (domain) {
+		switch (domain->type) {
+		case IOMMU_DOMAIN_NESTED:
+		case IOMMU_DOMAIN_UNMANAGED:
+			break;
+		default:
+			/* should never reach here */
+			WARN_ON(1);
+			break;
+		}
+	}
+}
+
+static int mock_domain_set_dev_pasid_nop(struct iommu_domain *domain,
+					 struct device *dev, ioasid_t pasid,
+					 struct iommu_domain *old)
+{
+	return 0;
+}
+
 static const struct iommu_ops mock_ops = {
 	/*
 	 * IOMMU_DOMAIN_BLOCKED cannot be returned from def_domain_type()
@@ -529,6 +553,7 @@ static const struct iommu_ops mock_ops = {
 	.capable = mock_domain_capable,
 	.device_group = generic_device_group,
 	.probe_device = mock_probe_device,
+	.remove_dev_pasid = mock_iommu_remove_dev_pasid,
 	.default_domain_ops =
 		&(struct iommu_domain_ops){
 			.free = mock_domain_free,
@@ -536,6 +561,7 @@ static const struct iommu_ops mock_ops = {
 			.map_pages = mock_domain_map_pages,
 			.unmap_pages = mock_domain_unmap_pages,
 			.iova_to_phys = mock_domain_iova_to_phys,
+			.set_dev_pasid = mock_domain_set_dev_pasid_nop,
 		},
 };
 
@@ -600,6 +626,7 @@ static struct iommu_domain_ops domain_nested_ops = {
 	.free = mock_domain_free_nested,
 	.attach_dev = mock_domain_nop_attach,
 	.cache_invalidate_user = mock_domain_cache_invalidate_user,
+	.set_dev_pasid = mock_domain_set_dev_pasid_nop,
 };
 
 static inline struct iommufd_hw_pagetable *
@@ -660,6 +687,10 @@ static void mock_dev_release(struct device *dev)
 
 static struct mock_dev *mock_dev_create(unsigned long dev_flags)
 {
+	struct property_entry prop[] = {
+		PROPERTY_ENTRY_U32("pasid-num-bits", 20),
+		{},
+	};
 	struct mock_dev *mdev;
 	int rc;
 
@@ -685,6 +716,12 @@ static struct mock_dev *mock_dev_create(unsigned long dev_flags)
 	if (rc)
 		goto err_put;
 
+	rc = device_create_managed_software_node(&mdev->dev, prop, NULL);
+	if (rc) {
+		dev_err(&mdev->dev, "add pasid-num-bits property failed, rc: %d", rc);
+		goto err_put;
+	}
+
 	rc = device_add(&mdev->dev);
 	if (rc)
 		goto err_put;
@@ -1491,6 +1528,8 @@ int __init iommufd_test_init(void)
 				  &iommufd_mock_bus_type.nb);
 	if (rc)
 		goto err_sysfs;
+
+	mock_iommu_device.max_pasids = (1 << 20);
 	return 0;
 
 err_sysfs:
-- 
2.34.1