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numam-dpdk/doc/guides/nics/thunderx.rst
Shijith Thotton 2c8f1396f7 doc: refer PMD compile/test section from thunderx guide 
Refer the section which explains driver compilation and running of
testpmd in Linux, instead of describing it in driver documentation.

Signed-off-by: Shijith Thotton <shijith.thotton@caviumnetworks.com>
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
2017-04-19 15:37:37 +02:00

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.. BSD LICENSE
Copyright (C) Cavium networks Ltd. 2016.
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 Cavium networks 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.
ThunderX NICVF Poll Mode Driver
===============================
The ThunderX NICVF PMD (**librte_pmd_thunderx_nicvf**) provides poll mode driver
support for the inbuilt NIC found in the **Cavium ThunderX** SoC family
as well as their virtual functions (VF) in SR-IOV context.
More information can be found at `Cavium Networks Official Website
<http://www.cavium.com/ThunderX_ARM_Processors.html>`_.
Features
--------
Features of the ThunderX PMD are:
- Multiple queues for TX and RX
- Receive Side Scaling (RSS)
- Packet type information
- Checksum offload
- Promiscuous mode
- Multicast mode
- Port hardware statistics
- Jumbo frames
- Link state information
- Scattered and gather for TX and RX
- VLAN stripping
- SR-IOV VF
- NUMA support
- Multi queue set support (up to 96 queues (12 queue sets)) per port
Supported ThunderX SoCs
-----------------------
- CN88xx
- CN81xx
- CN83xx
Prerequisites
-------------
- Follow the DPDK :ref:`Getting Started Guide for Linux <linux_gsg>` to setup the basic DPDK environment.
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_THUNDERX_NICVF_PMD`` (default ``y``)
Toggle compilation of the ``librte_pmd_thunderx_nicvf`` driver.
- ``CONFIG_RTE_LIBRTE_THUNDERX_NICVF_DEBUG_INIT`` (default ``n``)
Toggle display of initialization related messages.
- ``CONFIG_RTE_LIBRTE_THUNDERX_NICVF_DEBUG_RX`` (default ``n``)
Toggle display of receive fast path run-time message
- ``CONFIG_RTE_LIBRTE_THUNDERX_NICVF_DEBUG_TX`` (default ``n``)
Toggle display of transmit fast path run-time message
- ``CONFIG_RTE_LIBRTE_THUNDERX_NICVF_DEBUG_DRIVER`` (default ``n``)
Toggle display of generic debugging messages
- ``CONFIG_RTE_LIBRTE_THUNDERX_NICVF_DEBUG_MBOX`` (default ``n``)
Toggle display of PF mailbox related run-time check messages
Driver compilation and testing
------------------------------
Refer to the document :ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>`
for details.
To compile the ThunderX NICVF PMD for Linux arm64 gcc,
use arm64-thunderx-linuxapp-gcc as target.
Linux
-----
SR-IOV: Prerequisites and sample Application Notes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Current ThunderX NIC PF/VF kernel modules maps each physical Ethernet port
automatically to virtual function (VF) and presented them as PCIe-like SR-IOV device.
This section provides instructions to configure SR-IOV with Linux OS.
#. Verify PF devices capabilities using ``lspci``:
.. code-block:: console
lspci -vvv
Example output:
.. code-block:: console
0002:01:00.0 Ethernet controller: Cavium Networks Device a01e (rev 01)
...
Capabilities: [100 v1] Alternative Routing-ID Interpretation (ARI)
...
Capabilities: [180 v1] Single Root I/O Virtualization (SR-IOV)
...
Kernel driver in use: thunder-nic
...
.. note::
Unless ``thunder-nic`` driver is in use make sure your kernel config includes ``CONFIG_THUNDER_NIC_PF`` setting.
#. Verify VF devices capabilities and drivers using ``lspci``:
.. code-block:: console
lspci -vvv
Example output:
.. code-block:: console
0002:01:00.1 Ethernet controller: Cavium Networks Device 0011 (rev 01)
...
Capabilities: [100 v1] Alternative Routing-ID Interpretation (ARI)
...
Kernel driver in use: thunder-nicvf
...
0002:01:00.2 Ethernet controller: Cavium Networks Device 0011 (rev 01)
...
Capabilities: [100 v1] Alternative Routing-ID Interpretation (ARI)
...
Kernel driver in use: thunder-nicvf
...
.. note::
Unless ``thunder-nicvf`` driver is in use make sure your kernel config includes ``CONFIG_THUNDER_NIC_VF`` setting.
#. Pass VF device to VM context (PCIe Passthrough):
The VF devices may be passed through to the guest VM using qemu or
virt-manager or virsh etc.
Example qemu guest launch command:
.. code-block:: console
sudo qemu-system-aarch64 -name vm1 \
-machine virt,gic_version=3,accel=kvm,usb=off \
-cpu host -m 4096 \
-smp 4,sockets=1,cores=8,threads=1 \
-nographic -nodefaults \
-kernel <kernel image> \
-append "root=/dev/vda console=ttyAMA0 rw hugepagesz=512M hugepages=3" \
-device vfio-pci,host=0002:01:00.1 \
-drive file=<rootfs.ext3>,if=none,id=disk1,format=raw \
-device virtio-blk-device,scsi=off,drive=disk1,id=virtio-disk1,bootindex=1 \
-netdev tap,id=net0,ifname=tap0,script=/etc/qemu-ifup_thunder \
-device virtio-net-device,netdev=net0 \
-serial stdio \
-mem-path /dev/huge
#. Enable **VFIO-NOIOMMU** mode (optional):
.. code-block:: console
echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode
.. note::
**VFIO-NOIOMMU** is required only when running in VM context and should not be enabled otherwise.
#. Running testpmd:
Follow instructions available in the document
:ref:`compiling and testing a PMD for a NIC <pmd_build_and_test>`
to run testpmd.
Example output:
.. code-block:: console
./arm64-thunderx-linuxapp-gcc/app/testpmd -l 0-3 -n 4 -w 0002:01:00.2 \
-- -i --disable-hw-vlan-filter --disable-crc-strip --no-flush-rx \
--port-topology=loop
...
PMD: rte_nicvf_pmd_init(): librte_pmd_thunderx nicvf version 1.0
...
EAL: probe driver: 177d:11 rte_nicvf_pmd
EAL: using IOMMU type 1 (Type 1)
EAL: PCI memory mapped at 0x3ffade50000
EAL: Trying to map BAR 4 that contains the MSI-X table.
Trying offsets: 0x40000000000:0x0000, 0x10000:0x1f0000
EAL: PCI memory mapped at 0x3ffadc60000
PMD: nicvf_eth_dev_init(): nicvf: device (177d:11) 2:1:0:2
PMD: nicvf_eth_dev_init(): node=0 vf=1 mode=tns-bypass sqs=false
loopback_supported=true
PMD: nicvf_eth_dev_init(): Port 0 (177d:11) mac=a6:c6:d9:17:78:01
Interactive-mode selected
Configuring Port 0 (socket 0)
...
PMD: nicvf_dev_configure(): Configured ethdev port0 hwcap=0x0
Port 0: A6:C6:D9:17:78:01
Checking link statuses...
Port 0 Link Up - speed 10000 Mbps - full-duplex
Done
testpmd>
Multiple Queue Set per DPDK port configuration
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There are two types of VFs:
- Primary VF
- Secondary VF
Each port consists of a primary VF and n secondary VF(s). Each VF provides 8 Tx/Rx queues to a port.
When a given port is configured to use more than 8 queues, it requires one (or more) secondary VF.
Each secondary VF adds 8 additional queues to the queue set.
During PMD driver initialization, the primary VF's are enumerated by checking the
specific flag (see sqs message in DPDK boot log - sqs indicates secondary queue set).
They are at the beginning of VF list (the remain ones are secondary VF's).
The primary VFs are used as master queue sets. Secondary VFs provide
additional queue sets for primary ones. If a port is configured for more then
8 queues than it will request for additional queues from secondary VFs.
Secondary VFs cannot be shared between primary VFs.
Primary VFs are present on the beginning of the 'Network devices using kernel
driver' list, secondary VFs are on the remaining on the remaining part of the list.
.. note::
The VNIC driver in the multiqueue setup works differently than other drivers like `ixgbe`.
We need to bind separately each specific queue set device with the ``usertools/dpdk-devbind.py`` utility.
.. note::
Depending on the hardware used, the kernel driver sets a threshold ``vf_id``. VFs that try to attached with an id below or equal to
this boundary are considered primary VFs. VFs that try to attach with an id above this boundary are considered secondary VFs.
Example device binding
~~~~~~~~~~~~~~~~~~~~~~
If a system has three interfaces, a total of 18 VF devices will be created
on a non-NUMA machine.
.. note::
NUMA systems have 12 VFs per port and non-NUMA 6 VFs per port.
.. code-block:: console
# usertools/dpdk-devbind.py --status
Network devices using DPDK-compatible driver
============================================
<none>
Network devices using kernel driver
===================================
0000:01:10.0 'Device a026' if= drv=thunder-BGX unused=vfio-pci,uio_pci_generic
0000:01:10.1 'Device a026' if= drv=thunder-BGX unused=vfio-pci,uio_pci_generic
0002:01:00.0 'Device a01e' if= drv=thunder-nic unused=vfio-pci,uio_pci_generic
0002:01:00.1 'Device 0011' if=eth0 drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:00.2 'Device 0011' if=eth1 drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:00.3 'Device 0011' if=eth2 drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:00.4 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:00.5 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:00.6 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:00.7 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:01.0 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:01.1 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:01.2 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:01.3 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:01.4 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:01.5 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:01.6 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:01.7 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:02.0 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:02.1 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
0002:01:02.2 'Device 0011' if= drv=thunder-nicvf unused=vfio-pci,uio_pci_generic
Other network devices
=====================
0002:00:03.0 'Device a01f' unused=vfio-pci,uio_pci_generic
We want to bind two physical interfaces with 24 queues each device, we attach two primary VFs
and four secondary queues. In our example we choose two 10G interfaces eth1 (0002:01:00.2) and eth2 (0002:01:00.3).
We will choose four secondary queue sets from the ending of the list (0002:01:01.7-0002:01:02.2).
#. Bind two primary VFs to the ``vfio-pci`` driver:
.. code-block:: console
usertools/dpdk-devbind.py -b vfio-pci 0002:01:00.2
usertools/dpdk-devbind.py -b vfio-pci 0002:01:00.3
#. Bind four primary VFs to the ``vfio-pci`` driver:
.. code-block:: console
usertools/dpdk-devbind.py -b vfio-pci 0002:01:01.7
usertools/dpdk-devbind.py -b vfio-pci 0002:01:02.0
usertools/dpdk-devbind.py -b vfio-pci 0002:01:02.1
usertools/dpdk-devbind.py -b vfio-pci 0002:01:02.2
The nicvf thunderx driver will make use of attached secondary VFs automatically during the interface configuration stage.
Limitations
-----------
CRC striping
~~~~~~~~~~~~
The ThunderX SoC family NICs strip the CRC for every packets coming into the
host interface. So, CRC will be stripped even when the
``rxmode.hw_strip_crc`` member is set to 0 in ``struct rte_eth_conf``.
Maximum packet length
~~~~~~~~~~~~~~~~~~~~~
The ThunderX SoC family NICs support a maximum of a 9K jumbo frame. The value
is fixed and cannot be changed. So, even when the ``rxmode.max_rx_pkt_len``
member of ``struct rte_eth_conf`` is set to a value lower than 9200, frames
up to 9200 bytes can still reach the host interface.
Maximum packet segments
~~~~~~~~~~~~~~~~~~~~~~~
The ThunderX SoC family NICs support up to 12 segments per packet when working
in scatter/gather mode. So, setting MTU will result with ``EINVAL`` when the
frame size does not fit in the maximum number of segments.
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