Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright 2016 6WIND S.A.
+
+Overview of Networking Drivers
+==============================
+
+The networking drivers may be classified in two categories:
+
+- physical for real devices
+- virtual for emulated devices
+
+Some physical devices may be shaped through a virtual layer as for
+SR-IOV.
+The interface seen in the virtual environment is a VF (Virtual Function).
+
+The ethdev layer exposes an API to use the networking functions
+of these devices.
+The bottom half part of ethdev is implemented by the drivers.
+Thus some features may not be implemented.
+
+There are more differences between drivers regarding some internal properties,
+portability or even documentation availability.
+Most of these differences are summarized below.
+
+More details about features can be found in :doc:`features`.
+
+.. _table_net_pmd_features:
+
+.. include:: overview_table.txt
+
+.. Note::
+
+   Features marked with "P" are partially supported. Refer to the appropriate
+   NIC guide in the following sections for details.