diff options
Diffstat (limited to 'vnfs/qemu')
| -rw-r--r-- | vnfs/qemu/qemu.py | 22 | ||||
| -rw-r--r-- | vnfs/qemu/qemu_pci_passthrough.py | 87 |
2 files changed, 107 insertions, 2 deletions
diff --git a/vnfs/qemu/qemu.py b/vnfs/qemu/qemu.py index ec728c5c..9cb23ac6 100644 --- a/vnfs/qemu/qemu.py +++ b/vnfs/qemu/qemu.py @@ -66,6 +66,14 @@ class IVnfQemu(IVnf): # cli option take precedence to config file values self._guest_loopback = S.getValue('GUEST_LOOPBACK')[self._number] + self._testpmd_fwd_mode = S.getValue('GUEST_TESTPMD_FWD_MODE') + # in case of SRIOV we must ensure, that MAC addresses are not swapped + if S.getValue('SRIOV_ENABLED') and self._testpmd_fwd_mode.startswith('mac') and \ + not S.getValue('VNF').endswith('PciPassthrough'): + + self._logger.info("SRIOV detected, forwarding mode of testpmd was changed from '%s' to '%s'", + self._testpmd_fwd_mode, 'io') + self._testpmd_fwd_mode = 'io' name = 'Client%d' % self._number vnc = ':%d' % self._number @@ -306,6 +314,11 @@ class IVnfQemu(IVnf): # modify makefile if needed self._modify_dpdk_makefile() + # disable network interfaces, so DPDK can take care of them + self.execute_and_wait('ifdown ' + self._net1) + self.execute_and_wait('ifdown ' + self._net2) + + # build and insert igb_uio and rebind interfaces to it self.execute_and_wait('make RTE_OUTPUT=$RTE_SDK/$RTE_TARGET -C ' '$RTE_SDK/lib/librte_eal/linuxapp/igb_uio') self.execute_and_wait('modprobe uio') @@ -313,9 +326,14 @@ class IVnfQemu(IVnf): S.getValue('RTE_TARGET')) self.execute_and_wait('./tools/dpdk_nic_bind.py --status') self.execute_and_wait( + './tools/dpdk_nic_bind.py -u' ' ' + + S.getValue('GUEST_NET1_PCI_ADDRESS')[self._number] + ' ' + + S.getValue('GUEST_NET2_PCI_ADDRESS')[self._number]) + self.execute_and_wait( './tools/dpdk_nic_bind.py -b igb_uio' ' ' + S.getValue('GUEST_NET1_PCI_ADDRESS')[self._number] + ' ' + S.getValue('GUEST_NET2_PCI_ADDRESS')[self._number]) + self.execute_and_wait('./tools/dpdk_nic_bind.py --status') # build and run 'test-pmd' self.execute_and_wait('cd ' + S.getValue('GUEST_OVS_DPDK_DIR') + @@ -325,9 +343,9 @@ class IVnfQemu(IVnf): self.execute_and_wait('./testpmd -c 0x3 -n 4 --socket-mem 512 --' ' --burst=64 -i --txqflags=0xf00 ' + '--disable-hw-vlan', 60, "Done") - self.execute('set fwd mac_retry', 1) + self.execute('set fwd ' + self._testpmd_fwd_mode, 1) self.execute_and_wait('start', 20, - 'TX RS bit threshold=0 - TXQ flags=0xf00') + 'TX RS bit threshold=.+ - TXQ flags=0xf00') def _configure_l2fwd(self): """ diff --git a/vnfs/qemu/qemu_pci_passthrough.py b/vnfs/qemu/qemu_pci_passthrough.py new file mode 100644 index 00000000..1b55fdf2 --- /dev/null +++ b/vnfs/qemu/qemu_pci_passthrough.py @@ -0,0 +1,87 @@ +# Copyright 2015 Intel Corporation. +# +# 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. + +"""Automation of QEMU hypervisor with direct access to host NICs via + PCI passthrough. +""" + +import logging +import subprocess +import os + +from conf import settings as S +from vnfs.qemu.qemu import IVnfQemu +from tools import tasks +from tools.module_manager import ModuleManager + +_MODULE_MANAGER = ModuleManager() +_RTE_PCI_TOOL = os.path.join(S.getValue('RTE_SDK'), 'tools', 'dpdk_nic_bind.py') + +class QemuPciPassthrough(IVnfQemu): + """ + Control an instance of QEMU with direct access to the host network devices + """ + def __init__(self): + """ + Initialization function. + """ + super(QemuPciPassthrough, self).__init__() + self._logger = logging.getLogger(__name__) + self._nics = S.getValue('NICS') + + # in case of SRIOV and PCI passthrough we must ensure, that MAC addresses are swapped + if S.getValue('SRIOV_ENABLED') and not self._testpmd_fwd_mode.startswith('mac'): + self._logger.info("SRIOV detected, forwarding mode of testpmd was changed from '%s' to '%s'", + self._testpmd_fwd_mode, 'mac_retry') + self._testpmd_fwd_mode = 'mac_retry' + + for nic in self._nics: + self._cmd += ['-device', 'vfio-pci,host=' + nic['pci']] + + def start(self): + """ + Start QEMU instance, bind host NICs to vfio-pci driver + """ + # load vfio-pci + _MODULE_MANAGER.insert_modules(['vfio-pci']) + + # bind every interface to vfio-pci driver + try: + nics_list = list(tmp_nic['pci'] for tmp_nic in self._nics) + tasks.run_task(['sudo', _RTE_PCI_TOOL, '--bind=vfio-pci'] + nics_list, + self._logger, 'Binding NICs %s...' % nics_list, True) + + except subprocess.CalledProcessError: + self._logger.error('Unable to bind NICs %s', self._nics) + + super(QemuPciPassthrough, self).start() + + def stop(self): + """ + Stop QEMU instance, bind host NICs to the original driver + """ + super(QemuPciPassthrough, self).stop() + + # bind original driver to every interface + for nic in self._nics: + if nic['driver']: + try: + tasks.run_task(['sudo', _RTE_PCI_TOOL, '--bind=' + nic['driver'], nic['pci']], + self._logger, 'Binding NIC %s...' % nic['pci'], True) + + except subprocess.CalledProcessError: + self._logger.error('Unable to bind NIC %s to driver %s', nic['pci'], nic['driver']) + + # unload vfio-pci driver + _MODULE_MANAGER.remove_modules() |