diff --git a/drivers/infiniband/hw/erdma/erdma_hw.h b/drivers/infiniband/hw/erdma/erdma_hw.h
index 7e03c5f97501..f7f9dcac3ab0 100644
--- a/drivers/infiniband/hw/erdma/erdma_hw.h
+++ b/drivers/infiniband/hw/erdma/erdma_hw.h
@@ -23,6 +23,8 @@
 
 /* RoCEv2 related */
 #define ERDMA_ROCEV2_GID_SIZE 16
+#define ERDMA_MAX_PKEYS 1
+#define ERDMA_DEFAULT_PKEY 0xFFFF
 
 /* erdma device protocol type */
 enum erdma_proto_type {
diff --git a/drivers/infiniband/hw/erdma/erdma_main.c b/drivers/infiniband/hw/erdma/erdma_main.c
index 77440324b7e7..b9d0ad77436a 100644
--- a/drivers/infiniband/hw/erdma/erdma_main.c
+++ b/drivers/infiniband/hw/erdma/erdma_main.c
@@ -481,6 +481,7 @@ static const struct ib_device_ops erdma_device_ops_rocev2 = {
 	.get_link_layer = erdma_get_link_layer,
 	.add_gid = erdma_add_gid,
 	.del_gid = erdma_del_gid,
+	.query_pkey = erdma_query_pkey,
 };
 
 static const struct ib_device_ops erdma_device_ops_iwarp = {
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.c b/drivers/infiniband/hw/erdma/erdma_verbs.c
index 9944eed584ec..03ea52bb233e 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.c
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.c
@@ -336,6 +336,9 @@ int erdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr,
 	attr->max_fast_reg_page_list_len = ERDMA_MAX_FRMR_PA;
 	attr->page_size_cap = ERDMA_PAGE_SIZE_SUPPORT;
 
+	if (erdma_device_rocev2(dev))
+		attr->max_pkeys = ERDMA_MAX_PKEYS;
+
 	if (dev->attrs.cap_flags & ERDMA_DEV_CAP_FLAGS_ATOMIC)
 		attr->atomic_cap = IB_ATOMIC_GLOB;
 
@@ -372,6 +375,7 @@ int erdma_query_port(struct ib_device *ibdev, u32 port,
 	} else {
 		attr->gid_tbl_len = dev->attrs.max_gid;
 		attr->ip_gids = true;
+		attr->pkey_tbl_len = ERDMA_MAX_PKEYS;
 	}
 
 	attr->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_DEVICE_MGMT_SUP;
@@ -411,6 +415,7 @@ int erdma_get_port_immutable(struct ib_device *ibdev, u32 port,
 			RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
 		port_immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 		port_immutable->gid_tbl_len = dev->attrs.max_gid;
+		port_immutable->pkey_tbl_len = ERDMA_MAX_PKEYS;
 	}
 
 	return 0;
@@ -1903,3 +1908,12 @@ int erdma_del_gid(const struct ib_gid_attr *attr, void **context)
 	return erdma_set_gid(to_edev(attr->device), ERDMA_SET_GID_OP_DEL,
 			     attr->index, NULL);
 }
+
+int erdma_query_pkey(struct ib_device *ibdev, u32 port, u16 index, u16 *pkey)
+{
+	if (index >= ERDMA_MAX_PKEYS)
+		return -EINVAL;
+
+	*pkey = ERDMA_DEFAULT_PKEY;
+	return 0;
+}
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.h b/drivers/infiniband/hw/erdma/erdma_verbs.h
index 23cfeaf79eaa..1ae6ba56f597 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.h
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.h
@@ -394,5 +394,6 @@ enum rdma_link_layer erdma_get_link_layer(struct ib_device *ibdev,
 					  u32 port_num);
 int erdma_add_gid(const struct ib_gid_attr *attr, void **context);
 int erdma_del_gid(const struct ib_gid_attr *attr, void **context);
+int erdma_query_pkey(struct ib_device *ibdev, u32 port, u16 index, u16 *pkey);
 
 #endif