+ :param pf_pci_addr: PCI device address.
+ :param vf_id: Virtual Function ID.
+ :type node: dict
+ :type pf_pci_addr: str
+ :type vf_id: int
+ :raises RuntimeError: If Virtual Function unbind failed.
+ """
+ vf_pci_addr = DUTSetup.get_virtfn_pci_addr(node, pf_pci_addr, vf_id)
+ pf_pci = pf_pci_addr.replace(u":", r"\:")
+ vf_path = f"/sys/bus/pci/devices/{pf_pci}/virtfn{vf_id}"
+
+ command = f"sh -c \"echo {vf_pci_addr} | tee {vf_path}/driver/unbind\""
+ message = f"Failed to unbind VF {vf_pci_addr} on {node[u'host']}"
+
+ exec_cmd_no_error(
+ node, command, timeout=120, sudo=True, message=message
+ )
+
+ @staticmethod
+ def pci_vf_driver_bind(node, pf_pci_addr, vf_id, driver):
+ """Bind Virtual Function to driver on node.
+
+ :param node: DUT node.
+ :param pf_pci_addr: PCI device address.
+ :param vf_id: Virtual Function ID.
+ :param driver: Driver to bind.
+ :type node: dict
+ :type pf_pci_addr: str
+ :type vf_id: int
+ :type driver: str
+ :raises RuntimeError: If PCI device bind failed.
+ """
+ vf_pci_addr = DUTSetup.get_virtfn_pci_addr(node, pf_pci_addr, vf_id)
+ pf_pci = pf_pci_addr.replace(u":", r'\:')
+ vf_path = f"/sys/bus/pci/devices/{pf_pci}/virtfn{vf_id}"
+
+ message = f"Failed to bind VF {vf_pci_addr} to {driver} " \
+ f"on {node[u'host']}"
+ command = f"sh -c \"echo {driver} | tee {vf_path}/driver_override\""
+
+ exec_cmd_no_error(
+ node, command, timeout=120, sudo=True, message=message
+ )
+
+ command = f"sh -c \"echo {vf_pci_addr} | " \
+ f"tee /sys/bus/pci/drivers/{driver}/bind\""
+
+ exec_cmd_no_error(
+ node, command, timeout=120, sudo=True, message=message
+ )
+
+ command = f"sh -c \"echo | tee {vf_path}/driver_override\""
+
+ exec_cmd_no_error(
+ node, command, timeout=120, sudo=True, message=message
+ )
+
+ @staticmethod
+ def get_pci_dev_driver(node, pci_addr):
+ """Get current PCI device driver on node.
+
+ :param node: DUT node.
+ :param pci_addr: PCI device address.
+ :type node: dict
+ :type pci_addr: str
+ :returns: Driver or None
+ :raises RuntimeError: If it is not possible to get the interface driver
+ information from the node.
+ """
+ driver_path = f"/sys/bus/pci/devices/{pci_addr}/driver"
+ cmd = f"test -d {driver_path}"
+ ret_code, ret_val, _ = exec_cmd(node, cmd)
+ if int(ret_code):
+ # the directory doesn't exist which means the device is not bound
+ # to any driver
+ return None
+ cmd = f"basename $(readlink -f {driver_path})"
+ ret_val, _ = exec_cmd_no_error(node, cmd)
+ return ret_val.strip()
+
+ @staticmethod
+ def verify_kernel_module(node, module, force_load=False):
+ """Verify if kernel module is loaded on node. If parameter force
+ load is set to True, then try to load the modules.
+
+ :param node: Node.