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# Copyright (c) 2019 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Dpdk Utilities Library."""
from resources.libraries.python.OptionString import OptionString
from resources.libraries.python.ssh import exec_cmd_no_error
class DpdkUtil:
"""Utilities for DPDK."""
@staticmethod
def get_eal_options(**kwargs):
"""Create EAL parameters options (including -v).
:param kwargs: Dict of testpmd parameters.
:type kwargs: dict
:returns: EAL parameters.
:rtype: OptionString
"""
options = OptionString(prefix=u"-")
options.add(u"v")
# Set the hexadecimal bitmask of the cores to run on.
options.add_with_value_from_dict(u"l", u"eal_corelist", kwargs)
# Set master core.
options.add_with_value(u"-master-lcore", u"0")
# Load an external driver. Multiple -d options are allowed.
options.add_with_value_if_from_dict(
u"d", u"/usr/lib/librte_pmd_virtio.so", u"eal_driver", kwargs, True
)
options.add_if_from_dict(
u"-in-memory", u"eal_in_memory", kwargs, False
)
return options
@staticmethod
def get_pmd_options(**kwargs):
"""Create PMD parameters options (without --).
:param kwargs: List of testpmd parameters.
:type kwargs: dict
:returns: PMD parameters.
:rtype: OptionString
"""
options = OptionString(prefix=u"--")
# Set the forwarding mode: io, mac, mac_retry, mac_swap, flowgen,
# rxonly, txonly, csum, icmpecho, ieee1588
options.add_equals_from_dict(
u"forward-mode", u"pmd_fwd_mode", kwargs, u"io"
)
# Set the number of packets per burst to N.
options.add_equals(u"burst", 64)
# Set the number of descriptors in the TX rings to N.
options.add_equals_from_dict(u"txd", u"pmd_txd", kwargs, 1024)
# Set the number of descriptors in the RX rings to N.
options.add_equals_from_dict(u"rxd", u"pmd_rxd", kwargs, 1024)
# Set the number of queues in the TX to N.
options.add_equals_from_dict(u"txq", u"pmd_txq", kwargs, 1)
# Set the number of queues in the RX to N.
options.add_equals_from_dict(u"rxq", u"pmd_rxq", kwargs, 1)
# Set the hexadecimal bitmask of offloads.
options.add_equals_from_dict(u"tx-offloads", u"pmd_tx_offloads", kwargs)
# Set the number of mbufs to be allocated in the mbuf pools.
options.add_equals_from_dict(
u"total-num-mbufs", u"pmd_num_mbufs", kwargs
)
# Disable hardware VLAN.
options.add_if_from_dict(
u"disable-hw-vlan", u"pmd_disable_hw_vlan", kwargs, True
)
# Set the MAC address XX:XX:XX:XX:XX:XX of the peer port N
options.add_equals_from_dict(u"eth-peer", u"pmd_eth_peer_0", kwargs)
options.add_equals_from_dict(u"eth-peer", u"pmd_eth_peer_1", kwargs)
# Set the max packet length.
options.add_equals_from_dict(u"max-pkt-len", u"pmd_max_pkt_len", kwargs)
# Set the number of forwarding cores based on coremask.
options.add_equals_from_dict(u"nb-cores", u"pmd_nb_cores", kwargs)
return options
@staticmethod
def get_testpmd_cmdline(**kwargs):
"""Get DPDK testpmd command line arguments.
:param kwargs: Key-value testpmd parameters.
:type kwargs: dict
:returns: Command line string.
:rtype: OptionString
"""
options = OptionString()
options.add(u"testpmd")
options.extend(DpdkUtil.get_eal_options(**kwargs))
options.add(u"--")
options.extend(DpdkUtil.get_pmd_options(**kwargs))
return options
@staticmethod
def dpdk_testpmd_start(node, **kwargs):
"""Start DPDK testpmd app on VM node.
:param node: VM Node to start testpmd on.
:param kwargs: Key-value testpmd parameters.
:type node: dict
:type kwargs: dict
"""
cmd_options = OptionString()
cmd_options.add(u"/start-testpmd.sh")
cmd_options.extend(DpdkUtil.get_eal_options(**kwargs))
cmd_options.add(u"--")
cmd_options.extend(DpdkUtil.get_pmd_options(**kwargs))
exec_cmd_no_error(node, cmd_options, sudo=True, disconnect=True)
@staticmethod
def dpdk_testpmd_stop(node):
"""Stop DPDK testpmd app on node.
:param node: Node to stop testpmd on.
:type node: dict
:returns: nothing
"""
cmd = u"/stop-testpmd.sh" # Completed string, simple one.
exec_cmd_no_error(node, cmd, sudo=True, disconnect=True)
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