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+.. SPDX-License-Identifier: BSD-3-Clause
+ Copyright(c) 2014-2018 Chelsio Communications.
+ All rights reserved.
+
+CXGBE Poll Mode Driver
+======================
+
+The CXGBE PMD (**librte_pmd_cxgbe**) provides poll mode driver support
+for **Chelsio Terminator** 10/25/40/100 Gbps family of adapters. CXGBE PMD
+has support for the latest Linux and FreeBSD operating systems.
+
+CXGBEVF PMD provides poll mode driver support for SR-IOV Virtual functions
+and has support for the latest Linux operating systems.
+
+More information can be found at `Chelsio Communications Official Website
+<http://www.chelsio.com>`_.
+
+Features
+--------
+
+CXGBE and CXGBEVF PMD has support for:
+
+- Multiple queues for TX and RX
+- Receiver Side Steering (RSS)
+ Receiver Side Steering (RSS) on IPv4, IPv6, IPv4-TCP/UDP, IPv6-TCP/UDP.
+ For 4-tuple, enabling 'RSS on TCP' and 'RSS on TCP + UDP' is supported.
+- VLAN filtering
+- Checksum offload
+- Promiscuous mode
+- All multicast mode
+- Port hardware statistics
+- Jumbo frames
+- Flow API - Support for both Wildcard (LE-TCAM) and Exact (HASH) match filters.
+
+Limitations
+-----------
+
+The Chelsio Terminator series of devices provide two/four ports but
+expose a single PCI bus address, thus, librte_pmd_cxgbe registers
+itself as a PCI driver that allocates one Ethernet device per detected
+port.
+
+For this reason, one cannot whitelist/blacklist a single port without
+whitelisting/blacklisting the other ports on the same device.
+
+.. _t5-nics:
+
+Supported Chelsio T5 NICs
+-------------------------
+
+- 1G NICs: T502-BT
+- 10G NICs: T520-BT, T520-CR, T520-LL-CR, T520-SO-CR, T540-CR
+- 40G NICs: T580-CR, T580-LP-CR, T580-SO-CR
+- Other T5 NICs: T522-CR
+
+.. _t6-nics:
+
+Supported Chelsio T6 NICs
+-------------------------
+
+- 25G NICs: T6425-CR, T6225-CR, T6225-LL-CR, T6225-SO-CR
+- 100G NICs: T62100-CR, T62100-LP-CR, T62100-SO-CR
+
+Supported SR-IOV Chelsio NICs
+-----------------------------
+
+SR-IOV virtual functions are supported on all the Chelsio NICs listed
+in :ref:`t5-nics` and :ref:`t6-nics`.
+
+Prerequisites
+-------------
+
+- Requires firmware version **1.24.11.0** and higher. Visit
+ `Chelsio Download Center <http://service.chelsio.com>`_ to get latest firmware
+ bundled with the latest Chelsio Unified Wire package.
+
+ For Linux, installing and loading the latest cxgb4 kernel driver from the
+ Chelsio Unified Wire package should get you the latest firmware. More
+ information can be obtained from the User Guide that is bundled with the
+ Chelsio Unified Wire package.
+
+ For FreeBSD, the latest firmware obtained from the Chelsio Unified Wire
+ package must be manually flashed via cxgbetool available in FreeBSD source
+ repository.
+
+ Instructions on how to manually flash the firmware are given in section
+ :ref:`linux-installation` for Linux and section :ref:`freebsd-installation`
+ for FreeBSD.
+
+Pre-Installation Configuration
+------------------------------
+
+Config File Options
+~~~~~~~~~~~~~~~~~~~
+
+The following options can be modified in the ``.config`` file. Please note that
+enabling debugging options may affect system performance.
+
+- ``CONFIG_RTE_LIBRTE_CXGBE_PMD`` (default **y**)
+
+ Toggle compilation of librte_pmd_cxgbe driver.
+
+ .. note::
+
+ This controls compilation of both CXGBE and CXGBEVF PMD.
+
+Runtime Options
+~~~~~~~~~~~~~~~
+
+The following ``devargs`` options can be enabled at runtime. They must
+be passed as part of EAL arguments. For example,
+
+.. code-block:: console
+
+ testpmd -w 02:00.4,keep_ovlan=1 -- -i
+
+Common Runtime Options
+^^^^^^^^^^^^^^^^^^^^^^
+
+- ``keep_ovlan`` (default **0**)
+
+ Toggle behavior to keep/strip outer VLAN in Q-in-Q packets. If
+ enabled, the outer VLAN tag is preserved in Q-in-Q packets. Otherwise,
+ the outer VLAN tag is stripped in Q-in-Q packets.
+
+- ``tx_mode_latency`` (default **0**)
+
+ When set to 1, Tx doesn't wait for max number of packets to get
+ coalesced and sends the packets immediately at the end of the
+ current Tx burst. When set to 0, Tx waits across multiple Tx bursts
+ until the max number of packets have been coalesced. In this case,
+ Tx only sends the coalesced packets to hardware once the max
+ coalesce limit has been reached.
+
+CXGBE VF Only Runtime Options
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+- ``force_link_up`` (default **0**)
+
+ When set to 1, CXGBEVF PMD always forces link as up for all VFs on
+ underlying Chelsio NICs. This enables multiple VFs on the same NIC
+ to send traffic to each other even when the physical link is down.
+
+CXGBE PF Only Runtime Options
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+- ``filtermode`` (default **0**)
+
+ Apart from the 4-tuple (IP src/dst addresses and TCP/UDP src/dst port
+ addresses), there are only 40-bits available to match other fields in
+ packet headers. So, ``filtermode`` devarg allows user to dynamically
+ select a 40-bit supported match field combination for LETCAM (wildcard)
+ filters.
+
+ Default value of **0** makes driver pick the combination configured in
+ the firmware configuration file on the adapter.
+
+ The supported flags and their corresponding values are shown in table below.
+ These flags can be OR'd to create 1 of the multiple supported combinations
+ for LETCAM filters.
+
+ ================== ======
+ FLAG VALUE
+ ================== ======
+ Physical Port 0x1
+ PFVF 0x2
+ Destination MAC 0x4
+ Ethertype 0x8
+ Inner VLAN 0x10
+ Outer VLAN 0x20
+ IP TOS 0x40
+ IP Protocol 0x80
+ ================== ======
+
+ The supported ``filtermode`` combinations and their corresponding OR'd
+ values are shown in table below.
+
+ +-----------------------------------+-----------+
+ | FILTERMODE COMBINATIONS | VALUE |
+ +===================================+===========+
+ | Protocol, TOS, Outer VLAN, Port | 0xE1 |
+ +-----------------------------------+-----------+
+ | Protocol, TOS, Outer VLAN | 0xE0 |
+ +-----------------------------------+-----------+
+ | Protocol, TOS, Inner VLAN, Port | 0xD1 |
+ +-----------------------------------+-----------+
+ | Protocol, TOS, Inner VLAN | 0xD0 |
+ +-----------------------------------+-----------+
+ | Protocol, TOS, PFVF, Port | 0xC3 |
+ +-----------------------------------+-----------+
+ | Protocol, TOS, PFVF | 0xC2 |
+ +-----------------------------------+-----------+
+ | Protocol, TOS, Port | 0xC1 |
+ +-----------------------------------+-----------+
+ | Protocol, TOS | 0xC0 |
+ +-----------------------------------+-----------+
+ | Protocol, Outer VLAN, Port | 0xA1 |
+ +-----------------------------------+-----------+
+ | Protocol, Outer VLAN | 0xA0 |
+ +-----------------------------------+-----------+
+ | Protocol, Inner VLAN, Port | 0x91 |
+ +-----------------------------------+-----------+
+ | Protocol, Inner VLAN | 0x90 |
+ +-----------------------------------+-----------+
+ | Protocol, Ethertype, DstMAC, Port | 0x8D |
+ +-----------------------------------+-----------+
+ | Protocol, Ethertype, DstMAC | 0x8C |
+ +-----------------------------------+-----------+
+ | Protocol, Ethertype, Port | 0x89 |
+ +-----------------------------------+-----------+
+ | Protocol, Ethertype | 0x88 |
+ +-----------------------------------+-----------+
+ | Protocol, DstMAC, PFVF, Port | 0x87 |
+ +-----------------------------------+-----------+
+ | Protocol, DstMAC, PFVF | 0x86 |
+ +-----------------------------------+-----------+
+ | Protocol, DstMAC, Port | 0x85 |
+ +-----------------------------------+-----------+
+ | Protocol, DstMAC | 0x84 |
+ +-----------------------------------+-----------+
+ | Protocol, PFVF, Port | 0x83 |
+ +-----------------------------------+-----------+
+ | Protocol, PFVF | 0x82 |
+ +-----------------------------------+-----------+
+ | Protocol, Port | 0x81 |
+ +-----------------------------------+-----------+
+ | Protocol | 0x80 |
+ +-----------------------------------+-----------+
+ | TOS, Outer VLAN, Port | 0x61 |
+ +-----------------------------------+-----------+
+ | TOS, Outer VLAN | 0x60 |
+ +-----------------------------------+-----------+
+ | TOS, Inner VLAN, Port | 0x51 |
+ +-----------------------------------+-----------+
+ | TOS, Inner VLAN | 0x50 |
+ +-----------------------------------+-----------+
+ | TOS, Ethertype, DstMAC, Port | 0x4D |
+ +-----------------------------------+-----------+
+ | TOS, Ethertype, DstMAC | 0x4C |
+ +-----------------------------------+-----------+
+ | TOS, Ethertype, Port | 0x49 |
+ +-----------------------------------+-----------+
+ | TOS, Ethertype | 0x48 |
+ +-----------------------------------+-----------+
+ | TOS, DstMAC, PFVF, Port | 0x47 |
+ +-----------------------------------+-----------+
+ | TOS, DstMAC, PFVF | 0x46 |
+ +-----------------------------------+-----------+
+ | TOS, DstMAC, Port | 0x45 |
+ +-----------------------------------+-----------+
+ | TOS, DstMAC | 0x44 |
+ +-----------------------------------+-----------+
+ | TOS, PFVF, Port | 0x43 |
+ +-----------------------------------+-----------+
+ | TOS, PFVF | 0x42 |
+ +-----------------------------------+-----------+
+ | TOS, Port | 0x41 |
+ +-----------------------------------+-----------+
+ | TOS | 0x40 |
+ +-----------------------------------+-----------+
+ | Outer VLAN, Inner VLAN, Port | 0x31 |
+ +-----------------------------------+-----------+
+ | Outer VLAN, Ethertype, Port | 0x29 |
+ +-----------------------------------+-----------+
+ | Outer VLAN, Ethertype | 0x28 |
+ +-----------------------------------+-----------+
+ | Outer VLAN, DstMAC, Port | 0x25 |
+ +-----------------------------------+-----------+
+ | Outer VLAN, DstMAC | 0x24 |
+ +-----------------------------------+-----------+
+ | Outer VLAN, Port | 0x21 |
+ +-----------------------------------+-----------+
+ | Outer VLAN | 0x20 |
+ +-----------------------------------+-----------+
+ | Inner VLAN, Ethertype, Port | 0x19 |
+ +-----------------------------------+-----------+
+ | Inner VLAN, Ethertype | 0x18 |
+ +-----------------------------------+-----------+
+ | Inner VLAN, DstMAC, Port | 0x15 |
+ +-----------------------------------+-----------+
+ | Inner VLAN, DstMAC | 0x14 |
+ +-----------------------------------+-----------+
+ | Inner VLAN, Port | 0x11 |
+ +-----------------------------------+-----------+
+ | Inner VLAN | 0x10 |
+ +-----------------------------------+-----------+
+ | Ethertype, DstMAC, Port | 0xD |
+ +-----------------------------------+-----------+
+ | Ethertype, DstMAC | 0xC |
+ +-----------------------------------+-----------+
+ | Ethertype, PFVF, Port | 0xB |
+ +-----------------------------------+-----------+
+ | Ethertype, PFVF | 0xA |
+ +-----------------------------------+-----------+
+ | Ethertype, Port | 0x9 |
+ +-----------------------------------+-----------+
+ | Ethertype | 0x8 |
+ +-----------------------------------+-----------+
+ | DstMAC, PFVF, Port | 0x7 |
+ +-----------------------------------+-----------+
+ | DstMAC, PFVF | 0x6 |
+ +-----------------------------------+-----------+
+ | DstMAC, Port | 0x5 |
+ +-----------------------------------+-----------+
+ | Destination MAC | 0x4 |
+ +-----------------------------------+-----------+
+ | PFVF, Port | 0x3 |
+ +-----------------------------------+-----------+
+ | PFVF | 0x2 |
+ +-----------------------------------+-----------+
+ | Physical Port | 0x1 +
+ +-----------------------------------+-----------+
+
+ For example, to enable matching ``ethertype`` field in Ethernet
+ header, and ``protocol`` field in IPv4 header, the ``filtermode``
+ combination must be given as:
+
+ .. code-block:: console
+
+ testpmd -w 02:00.4,filtermode=0x88 -- -i
+
+- ``filtermask`` (default **0**)
+
+ ``filtermask`` devarg works similar to ``filtermode``, but is used
+ to configure a filter mode combination for HASH (exact-match) filters.
+
+ .. note::
+
+ The combination chosen for ``filtermask`` devarg **must be a subset** of
+ the combination chosen for ``filtermode`` devarg.
+
+ Default value of **0** makes driver pick the combination configured in
+ the firmware configuration file on the adapter.
+
+ Note that the filter rule will only be inserted in HASH region, if the
+ rule contains **all** the fields specified in the ``filtermask`` combination.
+ Otherwise, the filter rule will get inserted in LETCAM region.
+
+ The same combination list explained in the tables in ``filtermode`` devarg
+ section earlier applies for ``filtermask`` devarg, as well.
+
+ For example, to enable matching only protocol field in IPv4 header, the
+ ``filtermask`` combination must be given as:
+
+ .. code-block:: console
+
+ testpmd -w 02:00.4,filtermode=0x88,filtermask=0x80 -- -i
+
+.. _driver-compilation:
+
+Driver compilation and testing
+------------------------------
+
+Refer to the document :ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>`
+for details.
+
+Linux
+-----
+
+.. _linux-installation:
+
+Linux Installation
+~~~~~~~~~~~~~~~~~~
+
+Steps to manually install the latest firmware from the downloaded Chelsio
+Unified Wire package for Linux operating system are as follows:
+
+#. Load the kernel module:
+
+ .. code-block:: console
+
+ modprobe cxgb4
+
+#. Use ifconfig to get the interface name assigned to Chelsio card:
+
+ .. code-block:: console
+
+ ifconfig -a | grep "00:07:43"
+
+ Example output:
+
+ .. code-block:: console
+
+ p1p1 Link encap:Ethernet HWaddr 00:07:43:2D:EA:C0
+ p1p2 Link encap:Ethernet HWaddr 00:07:43:2D:EA:C8
+
+#. Install cxgbtool:
+
+ .. code-block:: console
+
+ cd <path_to_uwire>/tools/cxgbtool
+ make install
+
+#. Use cxgbtool to load the firmware config file onto the card:
+
+ .. code-block:: console
+
+ cxgbtool p1p1 loadcfg <path_to_uwire>/src/network/firmware/t5-config.txt
+
+#. Use cxgbtool to load the firmware image onto the card:
+
+ .. code-block:: console
+
+ cxgbtool p1p1 loadfw <path_to_uwire>/src/network/firmware/t5fw-*.bin
+
+#. Unload and reload the kernel module:
+
+ .. code-block:: console
+
+ modprobe -r cxgb4
+ modprobe cxgb4
+
+#. Verify with ethtool:
+
+ .. code-block:: console
+
+ ethtool -i p1p1 | grep "firmware"
+
+ Example output:
+
+ .. code-block:: console
+
+ firmware-version: 1.24.11.0, TP 0.1.23.2
+
+Running testpmd
+~~~~~~~~~~~~~~~
+
+This section demonstrates how to launch **testpmd** with Chelsio
+devices managed by librte_pmd_cxgbe in Linux operating system.
+
+#. Load the kernel module:
+
+ .. code-block:: console
+
+ modprobe cxgb4
+
+#. Get the PCI bus addresses of the interfaces bound to cxgb4 driver:
+
+ .. code-block:: console
+
+ dmesg | tail -2
+
+ Example output:
+
+ .. code-block:: console
+
+ cxgb4 0000:02:00.4 p1p1: renamed from eth0
+ cxgb4 0000:02:00.4 p1p2: renamed from eth1
+
+ .. note::
+
+ Both the interfaces of a Chelsio 2-port adapter are bound to the
+ same PCI bus address.
+
+#. Unload the kernel module:
+
+ .. code-block:: console
+
+ modprobe -ar cxgb4 csiostor
+
+#. Running testpmd
+
+ Follow instructions available in the document
+ :ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>`
+ to run testpmd.
+
+ .. note::
+
+ Currently, CXGBE PMD only supports the binding of PF4 for Chelsio NICs.
+
+ Example output:
+
+ .. code-block:: console
+
+ [...]
+ EAL: PCI device 0000:02:00.4 on NUMA socket -1
+ EAL: probe driver: 1425:5401 rte_cxgbe_pmd
+ EAL: PCI memory mapped at 0x7fd7c0200000
+ EAL: PCI memory mapped at 0x7fd77cdfd000
+ EAL: PCI memory mapped at 0x7fd7c10b7000
+ PMD: rte_cxgbe_pmd: fw: 1.24.11.0, TP: 0.1.23.2
+ PMD: rte_cxgbe_pmd: Coming up as MASTER: Initializing adapter
+ Interactive-mode selected
+ Configuring Port 0 (socket 0)
+ Port 0: 00:07:43:2D:EA:C0
+ Configuring Port 1 (socket 0)
+ Port 1: 00:07:43:2D:EA:C8
+ Checking link statuses...
+ PMD: rte_cxgbe_pmd: Port0: passive DA port module inserted
+ PMD: rte_cxgbe_pmd: Port1: passive DA port module inserted
+ Port 0 Link Up - speed 10000 Mbps - full-duplex
+ Port 1 Link Up - speed 10000 Mbps - full-duplex
+ Done
+ testpmd>
+
+ .. note::
+
+ Flow control pause TX/RX is disabled by default and can be enabled via
+ testpmd. Refer section :ref:`flow-control` for more details.
+
+Configuring SR-IOV Virtual Functions
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This section demonstrates how to enable SR-IOV virtual functions
+on Chelsio NICs and demonstrates how to run testpmd with SR-IOV
+virtual functions.
+
+#. Load the kernel module:
+
+ .. code-block:: console
+
+ modprobe cxgb4
+
+#. Get the PCI bus addresses of the interfaces bound to cxgb4 driver:
+
+ .. code-block:: console
+
+ dmesg | tail -2
+
+ Example output:
+
+ .. code-block:: console
+
+ cxgb4 0000:02:00.4 p1p1: renamed from eth0
+ cxgb4 0000:02:00.4 p1p2: renamed from eth1
+
+ .. note::
+
+ Both the interfaces of a Chelsio 2-port adapter are bound to the
+ same PCI bus address.
+
+#. Use ifconfig to get the interface name assigned to Chelsio card:
+
+ .. code-block:: console
+
+ ifconfig -a | grep "00:07:43"
+
+ Example output:
+
+ .. code-block:: console
+
+ p1p1 Link encap:Ethernet HWaddr 00:07:43:2D:EA:C0
+ p1p2 Link encap:Ethernet HWaddr 00:07:43:2D:EA:C8
+
+#. Bring up the interfaces:
+
+ .. code-block:: console
+
+ ifconfig p1p1 up
+ ifconfig p1p2 up
+
+#. Instantiate SR-IOV Virtual Functions. PF0..3 can be used for
+ SR-IOV VFs. Multiple VFs can be instantiated on each of PF0..3.
+ To instantiate one SR-IOV VF on each PF0 and PF1:
+
+ .. code-block:: console
+
+ echo 1 > /sys/bus/pci/devices/0000\:02\:00.0/sriov_numvfs
+ echo 1 > /sys/bus/pci/devices/0000\:02\:00.1/sriov_numvfs
+
+#. Get the PCI bus addresses of the virtual functions:
+
+ .. code-block:: console
+
+ lspci | grep -i "Chelsio" | grep -i "VF"
+
+ Example output:
+
+ .. code-block:: console
+
+ 02:01.0 Ethernet controller: Chelsio Communications Inc T540-CR Unified Wire Ethernet Controller [VF]
+ 02:01.1 Ethernet controller: Chelsio Communications Inc T540-CR Unified Wire Ethernet Controller [VF]
+
+#. Running testpmd
+
+ Follow instructions available in the document
+ :ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>`
+ to bind virtual functions and run testpmd.
+
+ Example output:
+
+ .. code-block:: console
+
+ [...]
+ EAL: PCI device 0000:02:01.0 on NUMA socket 0
+ EAL: probe driver: 1425:5803 net_cxgbevf
+ PMD: rte_cxgbe_pmd: Firmware version: 1.24.11.0
+ PMD: rte_cxgbe_pmd: TP Microcode version: 0.1.23.2
+ PMD: rte_cxgbe_pmd: Chelsio rev 0
+ PMD: rte_cxgbe_pmd: No bootstrap loaded
+ PMD: rte_cxgbe_pmd: No Expansion ROM loaded
+ PMD: rte_cxgbe_pmd: 0000:02:01.0 Chelsio rev 0 1G/10GBASE-SFP
+ EAL: PCI device 0000:02:01.1 on NUMA socket 0
+ EAL: probe driver: 1425:5803 net_cxgbevf
+ PMD: rte_cxgbe_pmd: Firmware version: 1.24.11.0
+ PMD: rte_cxgbe_pmd: TP Microcode version: 0.1.23.2
+ PMD: rte_cxgbe_pmd: Chelsio rev 0
+ PMD: rte_cxgbe_pmd: No bootstrap loaded
+ PMD: rte_cxgbe_pmd: No Expansion ROM loaded
+ PMD: rte_cxgbe_pmd: 0000:02:01.1 Chelsio rev 0 1G/10GBASE-SFP
+ Configuring Port 0 (socket 0)
+ Port 0: 06:44:29:44:40:00
+ Configuring Port 1 (socket 0)
+ Port 1: 06:44:29:44:40:10
+ Checking link statuses...
+ Done
+ testpmd>
+
+FreeBSD
+-------
+
+.. _freebsd-installation:
+
+FreeBSD Installation
+~~~~~~~~~~~~~~~~~~~~
+
+Steps to manually install the latest firmware from the downloaded Chelsio
+Unified Wire package for FreeBSD operating system are as follows:
+
+#. Load the kernel module:
+
+ .. code-block:: console
+
+ kldload if_cxgbe
+
+#. Use dmesg to get the t5nex instance assigned to the Chelsio card:
+
+ .. code-block:: console
+
+ dmesg | grep "t5nex"
+
+ Example output:
+
+ .. code-block:: console
+
+ t5nex0: <Chelsio T520-CR> irq 16 at device 0.4 on pci2
+ cxl0: <port 0> on t5nex0
+ cxl1: <port 1> on t5nex0
+ t5nex0: PCIe x8, 2 ports, 14 MSI-X interrupts, 31 eq, 13 iq
+
+ In the example above, a Chelsio T520-CR card is bound to a t5nex0 instance.
+
+#. Install cxgbetool from FreeBSD source repository:
+
+ .. code-block:: console
+
+ cd <path_to_FreeBSD_source>/tools/tools/cxgbetool/
+ make && make install
+
+#. Use cxgbetool to load the firmware image onto the card:
+
+ .. code-block:: console
+
+ cxgbetool t5nex0 loadfw <path_to_uwire>/src/network/firmware/t5fw-*.bin
+
+#. Unload and reload the kernel module:
+
+ .. code-block:: console
+
+ kldunload if_cxgbe
+ kldload if_cxgbe
+
+#. Verify with sysctl:
+
+ .. code-block:: console
+
+ sysctl -a | grep "t5nex" | grep "firmware"
+
+ Example output:
+
+ .. code-block:: console
+
+ dev.t5nex.0.firmware_version: 1.24.11.0
+
+Running testpmd
+~~~~~~~~~~~~~~~
+
+This section demonstrates how to launch **testpmd** with Chelsio
+devices managed by librte_pmd_cxgbe in FreeBSD operating system.
+
+#. Change to DPDK source directory where the target has been compiled in
+ section :ref:`driver-compilation`:
+
+ .. code-block:: console
+
+ cd <DPDK-source-directory>
+
+#. Copy the contigmem kernel module to /boot/kernel directory:
+
+ .. code-block:: console
+
+ cp x86_64-native-freebsd-clang/kmod/contigmem.ko /boot/kernel/
+
+#. Add the following lines to /boot/loader.conf:
+
+ .. code-block:: console
+
+ # reserve 2 x 1G blocks of contiguous memory using contigmem driver
+ hw.contigmem.num_buffers=2
+ hw.contigmem.buffer_size=1073741824
+ # load contigmem module during boot process
+ contigmem_load="YES"
+
+ The above lines load the contigmem kernel module during boot process and
+ allocate 2 x 1G blocks of contiguous memory to be used for DPDK later on.
+ This is to avoid issues with potential memory fragmentation during later
+ system up time, which may result in failure of allocating the contiguous
+ memory required for the contigmem kernel module.
+
+#. Restart the system and ensure the contigmem module is loaded successfully:
+
+ .. code-block:: console
+
+ reboot
+ kldstat | grep "contigmem"
+
+ Example output:
+
+ .. code-block:: console
+
+ 2 1 0xffffffff817f1000 3118 contigmem.ko
+
+#. Repeat step 1 to ensure that you are in the DPDK source directory.
+
+#. Load the cxgbe kernel module:
+
+ .. code-block:: console
+
+ kldload if_cxgbe
+
+#. Get the PCI bus addresses of the interfaces bound to t5nex driver:
+
+ .. code-block:: console
+
+ pciconf -l | grep "t5nex"
+
+ Example output:
+
+ .. code-block:: console
+
+ t5nex0@pci0:2:0:4: class=0x020000 card=0x00001425 chip=0x54011425 rev=0x00
+
+ In the above example, the t5nex0 is bound to 2:0:4 bus address.
+
+ .. note::
+
+ Both the interfaces of a Chelsio 2-port adapter are bound to the
+ same PCI bus address.
+
+#. Unload the kernel module:
+
+ .. code-block:: console
+
+ kldunload if_cxgbe
+
+#. Set the PCI bus addresses to hw.nic_uio.bdfs kernel environment parameter:
+
+ .. code-block:: console
+
+ kenv hw.nic_uio.bdfs="2:0:4"
+
+ This automatically binds 2:0:4 to nic_uio kernel driver when it is loaded in
+ the next step.
+
+ .. note::
+
+ Currently, CXGBE PMD only supports the binding of PF4 for Chelsio NICs.
+
+#. Load nic_uio kernel driver:
+
+ .. code-block:: console
+
+ kldload ./x86_64-native-freebsd-clang/kmod/nic_uio.ko
+
+#. Start testpmd with basic parameters:
+
+ .. code-block:: console
+
+ ./x86_64-native-freebsd-clang/app/testpmd -l 0-3 -n 4 -w 0000:02:00.4 -- -i
+
+ Example output:
+
+ .. code-block:: console
+
+ [...]
+ EAL: PCI device 0000:02:00.4 on NUMA socket 0
+ EAL: probe driver: 1425:5401 rte_cxgbe_pmd
+ EAL: PCI memory mapped at 0x8007ec000
+ EAL: PCI memory mapped at 0x842800000
+ EAL: PCI memory mapped at 0x80086c000
+ PMD: rte_cxgbe_pmd: fw: 1.24.11.0, TP: 0.1.23.2
+ PMD: rte_cxgbe_pmd: Coming up as MASTER: Initializing adapter
+ Interactive-mode selected
+ Configuring Port 0 (socket 0)
+ Port 0: 00:07:43:2D:EA:C0
+ Configuring Port 1 (socket 0)
+ Port 1: 00:07:43:2D:EA:C8
+ Checking link statuses...
+ PMD: rte_cxgbe_pmd: Port0: passive DA port module inserted
+ PMD: rte_cxgbe_pmd: Port1: passive DA port module inserted
+ Port 0 Link Up - speed 10000 Mbps - full-duplex
+ Port 1 Link Up - speed 10000 Mbps - full-duplex
+ Done
+ testpmd>
+
+.. note::
+
+ Flow control pause TX/RX is disabled by default and can be enabled via
+ testpmd. Refer section :ref:`flow-control` for more details.
+
+Sample Application Notes
+------------------------
+
+.. _flow-control:
+
+Enable/Disable Flow Control
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Flow control pause TX/RX is disabled by default and can be enabled via
+testpmd as follows:
+
+.. code-block:: console
+
+ testpmd> set flow_ctrl rx on tx on 0 0 0 0 mac_ctrl_frame_fwd off autoneg on 0
+ testpmd> set flow_ctrl rx on tx on 0 0 0 0 mac_ctrl_frame_fwd off autoneg on 1
+
+To disable again, run:
+
+.. code-block:: console
+
+ testpmd> set flow_ctrl rx off tx off 0 0 0 0 mac_ctrl_frame_fwd off autoneg off 0
+ testpmd> set flow_ctrl rx off tx off 0 0 0 0 mac_ctrl_frame_fwd off autoneg off 1
+
+Jumbo Mode
+~~~~~~~~~~
+
+There are two ways to enable sending and receiving of jumbo frames via testpmd.
+One method involves using the **mtu** command, which changes the mtu of an
+individual port without having to stop the selected port. Another method
+involves stopping all the ports first and then running **max-pkt-len** command
+to configure the mtu of all the ports with a single command.
+
+- To configure each port individually, run the mtu command as follows:
+
+ .. code-block:: console
+
+ testpmd> port config mtu 0 9000
+ testpmd> port config mtu 1 9000
+
+- To configure all the ports at once, stop all the ports first and run the
+ max-pkt-len command as follows:
+
+ .. code-block:: console
+
+ testpmd> port stop all
+ testpmd> port config all max-pkt-len 9000
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