def get_dpdk_devargs(ifname, noop):
if not noop:
vendor_id = common.get_vendor_id(ifname)
device_id = common.get_device_id(ifname)
if vendor_id == "0x15b3":
logger.info("Getting devargs for Mellanox cards")
if device_id == "0x1007":
# Some NICs (i.e. Mellanox ConnectX-3) have only one PCI
# address associated with multiple ports. Using a PCI
# device won’t work. Instead, we should use
# "class=eth,mac=<MAC>"
dpdk_devargs = f"class=eth,mac={common.interface_mac(ifname)}"
elif is_active_nic(ifname):
# Other Mellanox devices are active and they are not stored
# in dpdk_mapping.yaml file, so we need to get their pci
# address with ethtool.
dpdk_devargs = get_pci_address(ifname, noop)
elif common.is_vf_by_name(ifname):
# For Mellanox devices the VFs bound with DPDK shall
# be treated the same as VFs of other devices
dpdk_devargs = get_pci_address(ifname, noop)
else:
msg = ("Unable to get devargs for interface %s" % ifname)
raise InvalidInterfaceException(msg)
else:
logger.info("Getting stored PCI address as devarg")
dpdk_devargs = get_stored_pci_address(ifname, noop)
logger.debug("Devargs found: %s" % (dpdk_devargs))
return dpdk_devargs
def bind_dpdk_interfaces(ifname, driver, noop):
if common.is_mellanox_interface(ifname) and 'vfio-pci' in driver:
msg = ("For Mellanox NIC %s, the default driver vfio-pci "
"needs to be overridden" % ifname)
raise common.OvsDpdkBindException(msg)
iface_driver = get_interface_driver(ifname)
if iface_driver == driver:
logger.info("Driver (%s) is already bound to the device (%s)" %
(driver, ifname))
return
pci_address = get_pci_address(ifname, noop)
if not noop:
if pci_address:
# modbprobe of the driver has to be done before binding.
# for reboots, puppet will add the modprobe to /etc/rc.modules
if 'vfio-pci' in driver:
try:
processutils.execute('modprobe', 'vfio-pci')
except processutils.ProcessExecutionError:
msg = "Failed to modprobe vfio-pci module"
raise common.OvsDpdkBindException(msg)
mac_address = common.interface_mac(ifname)
vendor_id = common.get_vendor_id(ifname)
err = common.set_driverctl_override(pci_address, driver)
if not err:
_update_dpdk_map(ifname, pci_address, mac_address, driver)
# Not like other nics, beacause mellanox nics keep the
# interface after binding it to dpdk, so we are adding
# ethtool command with 10 attempts after binding the driver
# just to make sure that the interface is initialized
# successfully in order not to fail in each of this cases:
# - get_dpdk_devargs() in case of OvsDpdkPort and
# OvsDpdkBond.
# - bind_dpdk_interface() in case of OvsDpdkBond.
if vendor_id == common.MLNX_VENDOR_ID:
processutils.execute('ethtool', '-i', ifname, attempts=10)
else:
# Check if the pci address is already fetched and stored.
# If the pci address could not be fetched from dpdk_mapping.yaml
# raise OvsDpdkBindException, since the interface is neither
# available nor bound with dpdk.
if not get_stored_pci_address(ifname, noop):
msg = "Interface %s cannot be found" % ifname
raise common.OvsDpdkBindException(msg)
else:
logger.info('Interface %(name)s bound to DPDK driver %(driver)s '
'using driverctl command' % {
'name': ifname,
'driver': driver
})
def test_get_vendor_id_exception(self):
mocked_open = mock.mock_open()
mocked_open.side_effect = IOError
with mock.patch('os_net_config.common.open', mocked_open, create=True):
vendor = common.get_vendor_id('nic2')
self.assertEqual(None, vendor)
def test_get_vendor_id_success(self):
mocked_open = mock.mock_open(read_data='0x15b3\n')
with mock.patch('os_net_config.common.open', mocked_open, create=True):
vendor = common.get_vendor_id('nic2')
self.assertEqual('0x15b3', vendor)