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+Intel AVF device driver
+=======================
+
+Overview
+--------
+
+This plugins provides native device support for intel Adaptive Virtual
+Function (AVF). AVF is driver specification for current and future Intel
+Virtual Function devices. AVF defines communication channel between
+Physical Functions (PF) and VF. In essence, today this driver can be
+used only with Intel XL710 / X710 / XXV710 adapters.
+
+Prerequisites
+-------------
+
+-  Driver requires newer i40e PF linux driver to be installed on the
+   system, which supports virtualchnl interface. This code is tested
+   with i40e driver version 2.4.6.
+
+-  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
+------------
+
+This driver is still in experimental phase, however it shows very good
+performance numbers.
+
+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. Create and bind SR-IOV virtual function(s)
+
+Following script creates VF, assigns MAC address and binds VF to
+vfio-pci
+
+.. code:: bash
+
+   #!/bin/bash
+
+   if [ $USER != "root" ] ; then
+       echo "Restarting script with sudo..."
+       sudo $0 ${*}
+       exit
+   fi
+
+   setup () {
+     cd /sys/bus/pci/devices/${1}
+     driver=$(basename $(readlink driver))
+     if [ "${driver}" != "i40e" ]; then
+       echo ${1} | tee driver/unbind
+       echo ${1} | tee /sys/bus/pci/drivers/i40e/bind
+     fi
+     ifname=$(basename net/*)
+     echo 0 | tee sriov_numvfs > /dev/null
+     echo 1 | tee sriov_numvfs > /dev/null
+     ip link set dev ${ifname} vf 0 mac ${2}
+     ip link show dev ${ifname}
+     vf=$(basename $(readlink virtfn0))
+     echo ${vf} | tee virtfn0/driver/unbind
+     echo vfio-pci | tee virtfn0/driver_override
+     echo ${vf} | sudo tee /sys/bus/pci/drivers/vfio-pci/bind
+     echo  | tee virtfn0/driver_override
+   }
+
+   # Setup one VF on PF 0000:3b:00.0 and assign MAC address
+   setup 0000:3b:00.0 00:11:22:33:44:00
+   # Setup one VF on PF 0000:3b:00.1 and assign MAC address
+   setup 0000:3b:00.1 00:11:22:33:44:01
+
+Promisc mode
+~~~~~~~~~~~~
+
+In cases when interface is used in the L2 mode or promisc mode is needed
+for some other reason, trust needs to be set to “on” using the linux “ip
+link” utility.
+
+::
+
+   ip link set dev <PF inteface name> vf <VF id> trust on
+
+L2 spoofing check
+~~~~~~~~~~~~~~~~~
+
+By default Virtual Function is not allowed to send ethernet frames which
+have source MAC address different than address assigned to the VF. In
+some cases it is expected that VPP will send such frames (e.g. L2
+bridging, bonding, l2 cross-connect) and in such cases spoof check needs
+to be turned off by issuing following command:
+
+::
+
+   ip link set dev <PF inteface name> vf <VF id> spoofchk off
+
+Interface Creation
+~~~~~~~~~~~~~~~~~~
+
+Interfaces can be dynamically created by using following CLI:
+
+::
+
+   create interface avf 0000:3b:02.0
+   set int state avf-0/3b/2/0 up
+
+Interface Deletion
+~~~~~~~~~~~~~~~~~~
+
+Interface can be deleted with following CLI:
+
+::
+
+   delete interface avf <interface name>
+
+Interface Statistics
+~~~~~~~~~~~~~~~~~~~~
+
+Interface statistics can be displayed with
+``sh hardware-interface <if-name>`` command.