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VMWARE vmxnet3 device driver plugin

Overview

This plugin provides native PCI driver support for VMWare vmxnet3.

Prerequisites

  • This code is tested with vfio-pci driver installed with Ubuntu 18.04 which has kernel version 4.15.0-33-generic.
  • This code is tested with ESXi vSwitch version 6.0, release build 3620759.
  • Driver requires MSI-X interrupt support, which is not supported by uio_pci_generic driver, so vfio-pci needs to be used. On systems without IOMMU vfio driver can still be used with recent kernels which support no-iommu mode.

Known issues

  • TSO/LRO
  • RSS/multiple queues
  • VLAN filter

Usage

System setup

  1. load VFIO driver
    1 sudo modprobe vfio-pci
  2. (systems without IOMMU only) enable unsafe NOIOMMU mode
    1 echo Y | sudo tee /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
  3. Bind interface to vfio-pci
    1 sudo dpdk-devbind.py --bind vfio-pci 0b:00.0

Interface Creation

Interface can be dynamically created with following CLI:

1 create interface vmxnet3 0000:0b:00.0
2 set int state vmxnet3-0/b/0/0 up

Interface Deletion

Interface can be deleted with following CLI:

1 delete interface vmxnet3 <if-name>

Interface Statistics

Interface statistics can be displayed with show hardware-interface <if-name> command.

Show Interface CLI

Interface and ring information can be obtained with show vmxnet3 [if-name] [desc]