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From: Andrzej Ostruszka <amo@semihalf.com>
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Natalie Samsonov <nsamsono@marvell.com>
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Subject: [dpdk-dev] [PATCH v3 12/13] net/mvpp2: document MTR and TM usage
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From: Natalie Samsonov <nsamsono@marvell.com>
Document MTR (metering) and TM (traffic management) usage plus
do some small updates here and there.
Signed-off-by: Natalie Samsonov <nsamsono@marvell.com>
---
doc/guides/nics/img/mvpp2_tm.svg | 71 +++++++
doc/guides/nics/mvpp2.rst | 386 +++++++++++++++++++++++++++++++++------
2 files changed, 406 insertions(+), 51 deletions(-)
create mode 100644 doc/guides/nics/img/mvpp2_tm.svg
diff --git a/doc/guides/nics/img/mvpp2_tm.svg b/doc/guides/nics/img/mvpp2_tm.svg
new file mode 100644
index 0000000..4aa9272
--- /dev/null
+++ b/doc/guides/nics/img/mvpp2_tm.svg
@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/PR-SVG-20010719/DTD/svg10.dtd">
+<svg width="16cm" height="4cm" viewBox="-1 -1 309 75" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+ <g>
+ <polyline style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" points="159.661,12.6759 141.655,12.6759 141.655,35.5606 88.1561,35.5606 88.1561,44.9245 "/>
+ <polygon style="fill: #000000" points="88.1561,49.4245 85.1561,43.4245 88.1561,44.9245 91.1561,43.4245 "/>
+ <polygon style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" points="88.1561,49.4245 85.1561,43.4245 88.1561,44.9245 91.1561,43.4245 "/>
+ </g>
+ <g>
+ <polyline style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" points="159.661,12.6759 176.28,12.6759 176.28,35.5606 281.681,35.5606 281.681,44.9245 "/>
+ <polygon style="fill: #000000" points="281.681,49.4245 278.681,43.4245 281.681,44.9245 284.681,43.4245 "/>
+ <polygon style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" points="281.681,49.4245 278.681,43.4245 281.681,44.9245 284.681,43.4245 "/>
+ </g>
+ <g>
+ <rect style="fill: #ffffff" x="126.066" y="0.98102" width="67.1901" height="23.3899"/>
+ <rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="126.066" y="0.98102" width="67.1901" height="23.3899"/>
+ </g>
+ <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="159.661" y="17.1259">
+ <tspan x="159.661" y="17.1259">Port N</tspan>
+ </text>
+ <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="304.581" y="68.168">
+ <tspan x="304.581" y="68.168"></tspan>
+ </text>
+ <g>
+ <rect style="fill: #ffffff" x="62.5504" y="51.5478" width="51.2114" height="22.0925"/>
+ <rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="62.5504" y="51.5478" width="51.2114" height="22.0925"/>
+ </g>
+ <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="88.1561" y="67.044">
+ <tspan x="88.1561" y="67.044">Txq 0</tspan>
+ </text>
+ <g>
+ <rect style="fill: #ffffff" x="134.1" y="51.355" width="51.1213" height="22.478"/>
+ <rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="134.1" y="51.355" width="51.1213" height="22.478"/>
+ </g>
+ <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="159.661" y="67.044">
+ <tspan x="159.661" y="67.044">Txq 1</tspan>
+ </text>
+ <g>
+ <rect style="fill: #ffffff" x="256.416" y="51.5478" width="50.5306" height="22.0925"/>
+ <rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="256.416" y="51.5478" width="50.5306" height="22.0925"/>
+ </g>
+ <text font-size="12.7998" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="281.681" y="67.044">
+ <tspan x="281.681" y="67.044">Txq M</tspan>
+ </text>
+ <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="101.822" y="67.044">
+ <tspan x="101.822" y="67.044"></tspan>
+ </text>
+ <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="-0.537645" y="17.1259">
+ <tspan x="-0.537645" y="17.1259">Level 0:</tspan>
+ </text>
+ <text font-size="12.7998" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="-0.746688" y="67.044">
+ <tspan x="-0.746688" y="67.044">Level 1:</tspan>
+ </text>
+ <g>
+ <ellipse style="fill: #000000" cx="207.645" cy="62.594" rx="0.425344" ry="0.425344"/>
+ <ellipse style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" cx="207.645" cy="62.594" rx="0.425344" ry="0.425344"/>
+ </g>
+ <g>
+ <ellipse style="fill: #000000" cx="219.525" cy="62.594" rx="0.425344" ry="0.425344"/>
+ <ellipse style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" cx="219.525" cy="62.594" rx="0.425344" ry="0.425344"/>
+ </g>
+ <g>
+ <ellipse style="fill: #000000" cx="231.405" cy="62.594" rx="0.425345" ry="0.425345"/>
+ <ellipse style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" cx="231.405" cy="62.594" rx="0.425345" ry="0.425345"/>
+ </g>
+ <g>
+ <line style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" x1="159.661" y1="24.3709" x2="159.661" y2="45.737"/>
+ <polygon style="fill: #000000" points="159.661,50.237 156.661,44.237 159.661,45.737 162.661,44.237 "/>
+ <polygon style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" points="159.661,50.237 156.661,44.237 159.661,45.737 162.661,44.237 "/>
+ </g>
+</svg>
diff --git a/doc/guides/nics/mvpp2.rst b/doc/guides/nics/mvpp2.rst
index 3b3f8c6..59fa0e1 100644
--- a/doc/guides/nics/mvpp2.rst
+++ b/doc/guides/nics/mvpp2.rst
@@ -56,7 +56,7 @@ Features of the MVPP2 PMD are:
- Speed capabilities
- Link status
-- Queue start/stop
+- Tx Queue start/stop
- MTU update
- Jumbo frame
- Promiscuous mode
@@ -70,12 +70,13 @@ Features of the MVPP2 PMD are:
- L4 checksum offload
- Packet type parsing
- Basic stats
-- Extended stats
-- QoS
+- :ref:`Extended stats <extstats>`
- RX flow control
-- TX queue start/stop
- Scattered TX frames
-
+- :ref:`QoS <qossupport>`
+- :ref:`Flow API <flowapi>`
+- :ref:`Traffic metering and policing <mtrapi>`
+- :ref:`Traffic Management API <tmapi>`
Limitations
-----------
@@ -89,6 +90,20 @@ Limitations
functionality. Current workaround is to reset board so that PPv2 has a
chance to start in a sane state.
+- MUSDK architecture does not support changing configuration in run time.
+ All nessesary configurations should be done before first dev_start().
+
+- RX queue start/stop is not supported.
+
+- Current implementation does not support replacement of buffers in the HW buffer pool
+ at run time, so it is responsibility of the application to ensure that MTU does not exceed the configured buffer size.
+
+- Configuring TX flow control currently is not supported.
+
+- In current implementation, mechanism for acknowledging transmitted packets (``tx_done_cleanup``) is not supported.
+
+- Running more than one DPDK-MUSDK application simultaneously is not supported.
+
Prerequisites
-------------
@@ -139,6 +154,92 @@ The following options can be modified in the ``config`` file.
When MVPP2 PMD is enabled ``CONFIG_RTE_LIBRTE_MVNETA_PMD`` must be disabled
+
+Building DPDK
+-------------
+
+Driver needs precompiled MUSDK library during compilation.
+
+.. code-block:: console
+
+ export CROSS_COMPILE=<toolchain>/bin/aarch64-linux-gnu-
+ ./bootstrap
+ ./configure --host=aarch64-linux-gnu
+ make install
+
+MUSDK will be installed to `usr/local` under current directory.
+For the detailed build instructions please consult ``doc/musdk_get_started.txt``.
+
+Before the DPDK build process the environmental variable ``LIBMUSDK_PATH`` with
+the path to the MUSDK installation directory needs to be exported.
+
+For additional instructions regarding DPDK cross compilation please refer to :doc:`Cross compile DPDK for ARM64 <../linux_gsg/cross_build_dpdk_for_arm64>`.
+
+.. code-block:: console
+
+ export LIBMUSDK_PATH=<musdk>/usr/local
+ export CROSS=<toolchain>/bin/aarch64-linux-gnu-
+ export RTE_KERNELDIR=<kernel-dir>
+ export RTE_TARGET=arm64-armv8a-linuxapp-gcc
+
+ make config T=arm64-armv8a-linuxapp-gcc
+ sed -i "s/MVNETA_PMD=y/MVNETA_PMD=n/" build/.config
+ sed -i "s/MVPP2_PMD=n/MVPP2_PMD=y/" build/.config
+ make
+
+Usage Example
+-------------
+
+MVPP2 PMD requires extra out of tree kernel modules to function properly.
+`musdk_cma` sources are part of the MUSDK. Please consult
+``doc/musdk_get_started.txt`` for the detailed build instructions.
+For `mvpp2x_sysfs` please consult ``Documentation/pp22_sysfs.txt`` for the
+detailed build instructions.
+
+.. code-block:: console
+
+ insmod musdk_cma.ko
+ insmod mvpp2x_sysfs.ko
+
+Additionally interfaces used by DPDK application need to be put up:
+
+.. code-block:: console
+
+ ip link set eth0 up
+ ip link set eth2 up
+
+In order to run testpmd example application following command can be used:
+
+.. code-block:: console
+
+ ./testpmd --vdev=eth_mvpp2,iface=eth0,iface=eth2 -c 7 -- \
+ --burst=128 --txd=2048 --rxd=1024 --rxq=2 --txq=2 --nb-cores=2 \
+ -i -a --rss-udp
+
+.. _extstats:
+
+Extended stats
+--------------
+
+MVPP2 PMD supports the following extended statistics:
+
+ - ``rx_bytes``: number of RX bytes
+ - ``rx_packets``: number of RX packets
+ - ``rx_unicast_packets``: number of RX unicast packets
+ - ``rx_errors``: number of RX MAC errors
+ - ``rx_fullq_dropped``: number of RX packets dropped due to full RX queue
+ - ``rx_bm_dropped``: number of RX packets dropped due to no available buffers in the HW pool
+ - ``rx_early_dropped``: number of RX packets that were early dropped
+ - ``rx_fifo_dropped``: number of RX packets dropped due to RX fifo overrun
+ - ``rx_cls_dropped``: number of RX packets dropped by classifier
+ - ``tx_bytes``: number of TX bytes
+ - ``tx_packets``: number of TX packets
+ - ``tx_unicast_packets``: number of TX unicast packets
+ - ``tx_errors``: number of TX MAC errors
+
+
+.. _qossupport:
+
QoS Configuration
-----------------
@@ -302,39 +403,14 @@ Usage example
./testpmd --vdev=eth_mvpp2,iface=eth0,iface=eth2,cfg=/home/user/mrvl.conf \
-c 7 -- -i -a --disable-hw-vlan-strip --rxq=3 --txq=3
-
-Building DPDK
--------------
-
-Driver needs precompiled MUSDK library during compilation.
-
-.. code-block:: console
-
- export CROSS_COMPILE=<toolchain>/bin/aarch64-linux-gnu-
- ./bootstrap
- ./configure --host=aarch64-linux-gnu
- make install
-
-MUSDK will be installed to `usr/local` under current directory.
-For the detailed build instructions please consult ``doc/musdk_get_started.txt``.
-
-Before the DPDK build process the environmental variable ``LIBMUSDK_PATH`` with
-the path to the MUSDK installation directory needs to be exported.
-
-.. code-block:: console
-
- export LIBMUSDK_PATH=<musdk>/usr/local
- export CROSS=aarch64-linux-gnu-
- make config T=arm64-armv8a-linuxapp-gcc
- sed -i "s/MVNETA_PMD=y/MVNETA_PMD=n/" build/.config
- sed -i "s/MVPP2_PMD=n/MVPP2_PMD=y/" build/.config
- make
+.. _flowapi:
Flow API
--------
PPv2 offers packet classification capabilities via classifier engine which
can be configured via generic flow API offered by DPDK.
+For an additional description please refer to DPDK :ref:`Generic flow API <Generic_flow_API>`.
Supported flow actions
~~~~~~~~~~~~~~~~~~~~~~
@@ -495,31 +571,239 @@ Following limitations need to be taken into account while creating flow rules:
For additional information about classifier please consult
``doc/musdk_cls_user_guide.txt``.
-Usage Example
--------------
+.. _mtrapi:
-MVPP2 PMD requires extra out of tree kernel modules to function properly.
-`musdk_cma` sources are part of the MUSDK. Please consult
-``doc/musdk_get_started.txt`` for the detailed build instructions.
-For `mvpp2x_sysfs` please consult ``Documentation/pp22_sysfs.txt`` for the
-detailed build instructions.
+Traffic metering and policing
+-----------------------------
-.. code-block:: console
+MVPP2 PMD supports DPDK traffic metering and policing that allows the following:
- insmod musdk_cma.ko
- insmod mvpp2x_sysfs.ko
+1. Meter ingress traffic.
+2. Do policing.
+3. Gather statistics.
-Additionally interfaces used by DPDK application need to be put up:
+For an additional description please refer to DPDK :doc:`Traffic Metering and Policing API <../prog_guide/traffic_metering_and_policing>`.
-.. code-block:: console
+The policer objects defined by this feature can work with the default policer defined via config file as discribed in :ref:`QoS Support <qossupport>`.
- ip link set eth0 up
- ip link set eth2 up
+Limitations
+~~~~~~~~~~~
-In order to run testpmd example application following command can be used:
+The following capabilities are not supported:
-.. code-block:: console
+- MTR object meter DSCP table update
+- MTR object policer action update
+- MTR object enabled statistics
- ./testpmd --vdev=eth_mvpp2,iface=eth0,iface=eth2 -c 7 -- \
- --burst=128 --txd=2048 --rxd=1024 --rxq=2 --txq=2 --nb-cores=2 \
- -i -a --rss-udp
+Usage example
+~~~~~~~~~~~~~
+
+1. Run testpmd user app:
+
+ .. code-block:: console
+
+ ./testpmd --vdev=eth_mvpp2,iface=eth0,iface=eth2 -c 6 -- -i -p 3 -a --txd 1024 --rxd 1024
+
+2. Create meter profile:
+
+ .. code-block:: console
+
+ testpmd> add port meter profile 0 0 srtcm_rfc2697 2000 256 256
+
+3. Create meter:
+
+ .. code-block:: console
+
+ testpmd> create port meter 0 0 0 yes d d d 0 1 0
+
+4. Create flow rule witch meter attached:
+
+ .. code-block:: console
+
+ testpmd> flow create 0 ingress pattern ipv4 src is 10.10.10.1 / end actions meter mtr_id 0 / end
+
+For a detailed usage description please refer to "Traffic Metering and Policing" section in DPDK :doc:`Testpmd Runtime Functions <../testpmd_app_ug/testpmd_funcs>`.
+
+
+
+.. _tmapi:
+
+Traffic Management API
+----------------------
+
+MVPP2 PMD supports generic DPDK Traffic Management API which allows to
+configure the following features:
+
+1. Hierarchical scheduling
+2. Traffic shaping
+3. Congestion management
+4. Packet marking
+
+Internally TM is represented by a hierarchy (tree) of nodes.
+Node which has a parent is called a leaf whereas node without
+parent is called a non-leaf (root).
+MVPP2 PMD supports two level hierarchy where level 0 represents ports and level 1 represents tx queues of a given port.
+
+.. figure:: img/mvpp2_tm.svg
+
+Nodes hold following types of settings:
+
+- for egress scheduler configuration: weight
+- for egress rate limiter: private shaper
+- bitmask indicating which statistics counters will be read
+
+Hierarchy is always constructed from the top, i.e first a root node is added
+then some number of leaf nodes. Number of leaf nodes cannot exceed number
+of configured tx queues.
+
+After hierarchy is complete it can be committed.
+
+
+For an additional description please refer to DPDK :doc:`Traffic Management API <../prog_guide/traffic_management>`.
+
+Limitations
+~~~~~~~~~~~
+
+The following capabilities are not supported:
+
+- Traffic manager WRED profile and WRED context
+- Traffic manager shared shaper update
+- Traffic manager packet marking
+- Maximum number of levels in hierarchy is 2
+- Currently dynamic change of a hierarchy is not supported
+
+Usage example
+~~~~~~~~~~~~~
+
+For a detailed usage description please refer to "Traffic Management" section in DPDK :doc:`Testpmd Runtime Functions <../testpmd_app_ug/testpmd_funcs>`.
+
+1. Run testpmd as follows:
+
+ .. code-block:: console
+
+ ./testpmd --vdev=net_mrvl,iface=eth0,iface=eth2,cfg=./qos_config -c 7 -- \
+ -i -p 3 --disable-hw-vlan-strip --rxq 3 --txq 3 --txd 1024 --rxd 1024
+
+2. Stop all ports:
+
+ .. code-block:: console
+
+ testpmd> port stop all
+
+3. Add shaper profile:
+
+ .. code-block:: console
+
+ testpmd> add port tm node shaper profile 0 0 900000 70000 0
+
+ Parameters have following meaning::
+
+ 0 - Id of a port.
+ 0 - Id of a new shaper profile.
+ 900000 - Shaper rate in bytes/s.
+ 70000 - Bucket size in bytes.
+ 0 - Packet length adjustment - ignored.
+
+4. Add non-leaf node for port 0:
+
+ .. code-block:: console
+
+ testpmd> add port tm nonleaf node 0 3 -1 0 0 0 0 0 1 3 0
+
+ Parameters have following meaning::
+
+ 0 - Id of a port
+ 3 - Id of a new node.
+ -1 - Indicate that root does not have a parent.
+ 0 - Priority of the node.
+ 0 - Weight of the node.
+ 0 - Id of a level. Since this is a root 0 is passed.
+ 0 - Id of the shaper profile.
+ 0 - Number of SP priorities.
+ 3 - Enable statistics for both number of transmitted packets and bytes.
+ 0 - Number of shared shapers.
+
+5. Add leaf node for tx queue 0:
+
+ .. code-block:: console
+
+ testpmd> add port tm leaf node 0 0 3 0 30 1 -1 0 0 1 0
+
+ Parameters have following meaning::
+
+ 0 - Id of a port.
+ 0 - Id of a new node.
+ 3 - Id of the parent node.
+ 0 - Priority of a node.
+ 30 - WRR weight.
+ 1 - Id of a level. Since this is a leaf node 1 is passed.
+ -1 - Id of a shaper. -1 indicates that shaper is not attached.
+ 0 - Congestion management is not supported.
+ 0 - Congestion management is not supported.
+ 1 - Enable statistics counter for number of transmitted packets.
+ 0 - Number of shared shapers.
+
+6. Add leaf node for tx queue 1:
+
+ .. code-block:: console
+
+ testpmd> add port tm leaf node 0 1 3 0 60 1 -1 0 0 1 0
+
+ Parameters have following meaning::
+
+ 0 - Id of a port.
+ 1 - Id of a new node.
+ 3 - Id of the parent node.
+ 0 - Priority of a node.
+ 60 - WRR weight.
+ 1 - Id of a level. Since this is a leaf node 1 is passed.
+ -1 - Id of a shaper. -1 indicates that shaper is not attached.
+ 0 - Congestion management is not supported.
+ 0 - Congestion management is not supported.
+ 1 - Enable statistics counter for number of transmitted packets.
+ 0 - Number of shared shapers.
+
+7. Add leaf node for tx queue 2:
+
+ .. code-block:: console
+
+ testpmd> add port tm leaf node 0 2 3 0 99 1 -1 0 0 1 0
+
+ Parameters have following meaning::
+
+ 0 - Id of a port.
+ 2 - Id of a new node.
+ 3 - Id of the parent node.
+ 0 - Priority of a node.
+ 99 - WRR weight.
+ 1 - Id of a level. Since this is a leaf node 1 is passed.
+ -1 - Id of a shaper. -1 indicates that shaper is not attached.
+ 0 - Congestion management is not supported.
+ 0 - Congestion management is not supported.
+ 1 - Enable statistics counter for number of transmitted packets.
+ 0 - Number of shared shapers.
+
+8. Commit hierarchy:
+
+ .. code-block:: console
+
+ testpmd> port tm hierarchy commit 0 no
+
+ Parameters have following meaning::
+
+ 0 - Id of a port.
+ no - Do not flush TM hierarchy if commit fails.
+
+9. Start all ports
+
+ .. code-block:: console
+
+ testpmd> port start all
+
+
+
+10. Enable forwarding
+
+ .. code-block:: console
+
+ testpmd> start
--
2.7.4