1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
.. SPDX-License-Identifier: BSD-3-Clause
Copyright(c) 2017 Cavium, Inc
OCTEON TX Poll Mode driver
==========================
The OCTEON TX ETHDEV PMD (**librte_pmd_octeontx**) provides poll mode ethdev
driver support for the inbuilt network device found in the **Cavium OCTEON TX**
SoC family as well as their virtual functions (VF) in SR-IOV context.
More information can be found at `Cavium, Inc Official Website
<http://www.cavium.com/OCTEON-TX_ARM_Processors.html>`_.
Features
--------
Features of the OCTEON TX Ethdev PMD are:
- Packet type information
- Promiscuous mode
- Port hardware statistics
- Jumbo frames
- Link state information
- SR-IOV VF
- Multiple queues for TX
- Lock-free Tx queue
- HW offloaded `ethdev Rx queue` to `eventdev event queue` packet injection
Supported OCTEON TX SoCs
------------------------
- CN83xx
Unsupported features
--------------------
The features supported by the device and not yet supported by this PMD include:
- Receive Side Scaling (RSS)
- Scattered and gather for TX and RX
- Ingress classification support
- Egress hierarchical scheduling, traffic shaping, and marking
Prerequisites
-------------
See :doc:`../platform/octeontx` for setup information.
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_OCTEONTX_PMD`` (default ``y``)
Toggle compilation of the ``librte_pmd_octeontx`` driver.
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 OCTEON TX PMD for Linux arm64 gcc target, run the
following ``make`` command:
.. code-block:: console
cd <DPDK-source-directory>
make config T=arm64-thunderx-linuxapp-gcc install
#. 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 -c 700 \
--base-virtaddr=0x100000000000 \
--mbuf-pool-ops-name="octeontx_fpavf" \
--vdev='event_octeontx' \
--vdev='eth_octeontx,nr_port=2' \
-- --rxq=1 --txq=1 --nb-core=2 \
--total-num-mbufs=16384 -i
.....
EAL: Detected 24 lcore(s)
EAL: Probing VFIO support...
EAL: VFIO support initialized
.....
EAL: PCI device 0000:07:00.1 on NUMA socket 0
EAL: probe driver: 177d:a04b octeontx_ssovf
.....
EAL: PCI device 0001:02:00.7 on NUMA socket 0
EAL: probe driver: 177d:a0dd octeontx_pkivf
.....
EAL: PCI device 0001:03:01.0 on NUMA socket 0
EAL: probe driver: 177d:a049 octeontx_pkovf
.....
PMD: octeontx_probe(): created ethdev eth_octeontx for port 0
PMD: octeontx_probe(): created ethdev eth_octeontx for port 1
.....
Configuring Port 0 (socket 0)
Port 0: 00:0F:B7:11:94:46
Configuring Port 1 (socket 0)
Port 1: 00:0F:B7:11:94:47
.....
Checking link statuses...
Port 0 Link Up - speed 40000 Mbps - full-duplex
Port 1 Link Up - speed 40000 Mbps - full-duplex
Done
testpmd>
Initialization
--------------
The OCTEON TX ethdev pmd is exposed as a vdev device which consists of a set
of PKI and PKO PCIe VF devices. On EAL initialization,
PKI/PKO PCIe VF devices will be probed and then the vdev device can be created
from the application code, or from the EAL command line based on
the number of probed/bound PKI/PKO PCIe VF device to DPDK by
* Invoking ``rte_vdev_init("eth_octeontx")`` from the application
* Using ``--vdev="eth_octeontx"`` in the EAL options, which will call
rte_vdev_init() internally
Device arguments
~~~~~~~~~~~~~~~~
Each ethdev port is mapped to a physical port(LMAC), Application can specify
the number of interesting ports with ``nr_ports`` argument.
Dependency
~~~~~~~~~~
``eth_octeontx`` pmd is depend on ``event_octeontx`` eventdev device and
``octeontx_fpavf`` external mempool handler.
Example:
.. code-block:: console
./your_dpdk_application --mbuf-pool-ops-name="octeontx_fpavf" \
--vdev='event_octeontx' \
--vdev="eth_octeontx,nr_port=2"
Limitations
-----------
``octeontx_fpavf`` external mempool handler dependency
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The OCTEON TX SoC family NIC has inbuilt HW assisted external mempool manager.
This driver will only work with ``octeontx_fpavf`` external mempool handler
as it is the most performance effective way for packet allocation and Tx buffer
recycling on OCTEON TX SoC platform.
CRC striping
~~~~~~~~~~~~
The OCTEON TX SoC family NICs strip the CRC for every packets coming into the
host interface irrespective of the offload configuration.
Maximum packet length
~~~~~~~~~~~~~~~~~~~~~
The OCTEON TX SoC family NICs support a maximum of a 32K 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 32k, frames
up to 32k bytes can still reach the host interface.
|
