vmxnet3 device driver

Implemented vmxnet3 deivice driver for VMWare ESXi. Tested with Ubuntu 18.04
connected to ESXi 6.0

Ubuntu-18.04 (VPP) --- ESXi-6.0

Change-Id: I85fbc86f2d8532b017bc4271612d17e24e498e4d
Signed-off-by: Steven Luong  <sluong@cisco.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/src/plugins/vmxnet3/README.md b/src/plugins/vmxnet3/README.md
new file mode 100644
index 00000000000..a49671325c9
--- /dev/null
+++ b/src/plugins/vmxnet3/README.md
@@ -0,0 +1,59 @@
+# 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
+
+* NUMA support
+* TSO
+* VLAN filter
+
+## Usage
+### System setup
+
+1. load VFIO driver
+```
+sudo modprobe vfio-pci
+```
+
+2. (systems without IOMMU only) enable unsafe NOIOMMU mode
+```
+echo Y | sudo tee /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
+```
+
+3. Bind interface to vfio-pci
+```
+dpdk-devbind.py --bind vfio-pci 0b:00.0
+```
+
+### Interface Creation
+Interface can be dynamically created with following CLI:
+```
+create interface vmxnet3 0000:0b:00.0
+set int state vmxnet3-0/b/0/0 up
+```
+
+### Interface Deletion
+Interface can be deleted with following CLI:
+```
+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]`