1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright(c) 2015-2017 Netronome Systems, Inc. All rights reserved.
5 NFP poll mode driver library
6 ============================
8 Netronome's sixth generation of flow processors pack 216 programmable
9 cores and over 100 hardware accelerators that uniquely combine packet,
10 flow, security and content processing in a single device that scales
13 This document explains how to use DPDK with the Netronome Poll Mode
14 Driver (PMD) supporting Netronome's Network Flow Processor 6xxx
15 (NFP-6xxx) and Netronome's Flow Processor 4xxx (NFP-4xxx).
17 NFP is a SRIOV capable device and the PMD driver supports the physical
18 function (PF) and the virtual functions (VFs).
23 Before using the Netronome's DPDK PMD some NFP configuration,
24 which is not related to DPDK, is required. The system requires
25 installation of **Netronome's BSP (Board Support Package)** along
26 with a specific NFP firmware application. Netronome's NSP ABI
27 version should be 0.20 or higher.
29 If you have a NFP device you should already have the code and
30 documentation for this configuration. Contact
31 **support@netronome.com** to obtain the latest available firmware.
33 The NFP Linux netdev kernel driver for VFs has been a part of the
34 vanilla kernel since kernel version 4.5, and support for the PF
35 since kernel version 4.11. Support for older kernels can be obtained
37 **https://github.com/Netronome/nfp-drv-kmods** along with the build
40 NFP PMD needs to be used along with UIO ``igb_uio`` or VFIO (``vfio-pci``)
46 Netronome's PMD code is provided in the **drivers/net/nfp** directory.
47 Although NFP PMD has NetronomeĀ“s BSP dependencies, it is possible to
48 compile it along with other DPDK PMDs even if no BSP was installed previously.
49 Of course, a DPDK app will require such a BSP installed for using the
50 NFP PMD, along with a specific NFP firmware application.
52 Once the DPDK is built all the DPDK apps and examples include support for
56 Driver compilation and testing
57 ------------------------------
59 Refer to the document :ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>`
65 NFP PMD supports using the NFP PF as another DPDK port, but it does not
66 have any functionality for controlling VFs. In fact, it is not possible to use
67 the PMD with the VFs if the PF is being used by DPDK, that is, with the NFP PF
68 bound to ``igb_uio`` or ``vfio-pci`` kernel drivers. Future DPDK versions will
69 have a PMD able to work with the PF and VFs at the same time and with the PF
70 implementing VF management along with other PF-only functionalities/offloads.
72 The PMD PF has extra work to do which will delay the DPDK app initialization
73 like uploading the firmware and configure the Link state properly when starting or
74 stopping a PF port. Since DPDK 18.05 the firmware upload happens when
75 a PF is initialized, which was not always true with older DPDK versions.
77 Depending on the Netronome product installed in the system, firmware files
78 should be available under ``/lib/firmware/netronome``. DPDK PMD supporting the
79 PF looks for a firmware file in this order:
81 1) First try to find a firmware image specific for this device using the
84 serial-00-15-4d-12-20-65-10-ff.nffw
86 2) Then try the PCI name:
90 3) Finally try the card type and media:
92 nic_AMDA0099-0001_2x25.nffw
94 Netronome's software packages install firmware files under ``/lib/firmware/netronome``
95 to support all the Netronome's SmartNICs and different firmware applications.
96 This is usually done using file names based on SmartNIC type and media and with a
97 directory per firmware application. Options 1 and 2 for firmware filenames allow
98 more than one SmartNIC, same type of SmartNIC or different ones, and to upload a
99 different firmware to each SmartNIC.
102 Currently the NFP PMD supports using the PF with Agilio Basic Firmware. See
103 https://help.netronome.com/support/solutions for more information on the
104 various firmwares supported by the Netronome Agilio CX smartNIC.
109 The NFP PMD can work with up to 8 ports on the same PF device. The number of
110 available ports is firmware and hardware dependent, and the driver looks for a
111 firmware symbol during initialization to know how many can be used.
113 DPDK apps work with ports, and a port is usually a PF or a VF PCI device.
114 However, with the NFP PF multiport there is just one PF PCI device. Supporting
115 this particular configuration requires the PMD to create ports in a special way,
116 although once they are created, DPDK apps should be able to use them as normal
119 NFP ports belonging to same PF can be seen inside PMD initialization with a
120 suffix added to the PCI ID: wwww:xx:yy.z_portn. For example, a PF with PCI ID
121 0000:03:00.0 and four ports is seen by the PMD code as:
123 .. code-block:: console
132 There are some limitations with multiport support: RX interrupts and
133 device hot-plugging are not supported.
135 PF multiprocess support
136 -----------------------
138 Due to how the driver needs to access the NFP through a CPP interface, which implies
139 to use specific registers inside the chip, the number of secondary processes with PF
140 ports is limited to only one.
142 This limitation will be solved in future versions but having basic multiprocess support
143 is important for allowing development and debugging through the PF using a secondary
144 process which will create a CPP bridge for user space tools accessing the NFP.
150 #. **Enable SR-IOV on the NFP device:** The current NFP PMD supports the PF and
151 the VFs on a NFP device. However, it is not possible to work with both at the
152 same time because the VFs require the PF being bound to the NFP PF Linux
153 netdev driver. Make sure you are working with a kernel with NFP PF support or
154 get the drivers from the above Github repository and follow the instructions
155 for building and installing it.
157 VFs need to be enabled before they can be used with the PMD.
158 Before enabling the VFs it is useful to obtain information about the
159 current NFP PCI device detected by the system:
161 .. code-block:: console
165 Now, for example, configure two virtual functions on a NFP-6xxx device
166 whose PCI system identity is "0000:03:00.0":
168 .. code-block:: console
170 echo 2 > /sys/bus/pci/devices/0000:03:00.0/sriov_numvfs
172 The result of this command may be shown using lspci again:
174 .. code-block:: console
178 Two new PCI devices should appear in the output of the above command. The
179 -k option shows the device driver, if any, that devices are bound to.
180 Depending on the modules loaded at this point the new PCI devices may be
181 bound to nfp_netvf driver.