Adding upstream version 14.2.21.upstream/14.2.21upstream

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

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+..  BSD LICENSE
+    Copyright(c) 2015 Netronome Systems, Inc. All rights reserved.
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+    * Neither the name of Intel Corporation nor the names of its
+    contributors may be used to endorse or promote products derived
+    from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+NFP poll mode driver library
+============================
+
+Netronome's sixth generation of flow processors pack 216 programmable
+cores and over 100 hardware accelerators that uniquely combine packet,
+flow, security and content processing in a single device that scales
+up to 400 Gbps.
+
+This document explains how to use DPDK with the Netronome Poll Mode
+Driver (PMD) supporting Netronome's Network Flow Processor 6xxx
+(NFP-6xxx).
+
+Currently the driver supports virtual functions (VFs) only.
+
+Dependencies
+------------
+
+Before using the Netronome's DPDK PMD some NFP-6xxx configuration,
+which is not related to DPDK, is required. The system requires
+installation of **Netronome's BSP (Board Support Package)** which includes
+Linux drivers, programs and libraries.
+
+If you have a NFP-6xxx device you should already have the code and
+documentation for doing this configuration. Contact
+**support@netronome.com** to obtain the latest available firmware.
+
+The NFP Linux kernel drivers (including the required PF driver for the
+NFP) are available on Github at
+**https://github.com/Netronome/nfp-drv-kmods** along with build
+instructions.
+
+DPDK runs in userspace and PMDs uses the Linux kernel UIO interface to
+allow access to physical devices from userspace. The NFP PMD requires
+the **igb_uio** UIO driver, available with DPDK, to perform correct
+initialization.
+
+Building the software
+---------------------
+
+Netronome's PMD code is provided in the **drivers/net/nfp** directory.
+Although NFP PMD has Netronome´s BSP dependencies, it is possible to
+compile it along with other DPDK PMDs even if no BSP was installed before.
+Of course, a DPDK app will require such a BSP installed for using the
+NFP PMD.
+
+Default PMD configuration is at **common_linuxapp configuration** file:
+
+- **CONFIG_RTE_LIBRTE_NFP_PMD=y**
+
+Once DPDK is built all the DPDK apps and examples include support for
+the NFP PMD.
+
+
+Driver compilation and testing
+------------------------------
+
+Refer to the document :ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>`
+for details.
+
+
+System configuration
+--------------------
+
+#. **Enable SR-IOV on the NFP-6xxx device:** The current NFP PMD works with
+   Virtual Functions (VFs) on a NFP device. Make sure that one of the Physical
+   Function (PF) drivers from the above Github repository is installed and
+   loaded.
+
+   Virtual Functions need to be enabled before they can be used with the PMD.
+   Before enabling the VFs it is useful to obtain information about the
+   current NFP PCI device detected by the system:
+
+   .. code-block:: console
+
+      lspci -d19ee:
+
+   Now, for example, configure two virtual functions on a NFP-6xxx device
+   whose PCI system identity is "0000:03:00.0":
+
+   .. code-block:: console
+
+      echo 2 > /sys/bus/pci/devices/0000:03:00.0/sriov_numvfs
+
+   The result of this command may be shown using lspci again:
+
+   .. code-block:: console
+
+      lspci -d19ee: -k
+
+   Two new PCI devices should appear in the output of the above command. The
+   -k option shows the device driver, if any, that devices are bound to.
+   Depending on the modules loaded at this point the new PCI devices may be
+   bound to nfp_netvf driver.