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docs: networking: device drivers: convert aquantia/atlantic.txt to ReST 

- add SPDX header;
- use copyright symbol;
- adjust title and its markup;
- comment out text-only TOC from html/pdf output;
- mark code blocks and literals as such;
- adjust identation, whitespaces and blank lines where needed;
- add to networking/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mauro Carvalho Chehab 2020-05-01 16:44:37 +02:00 committed by David S. Miller
parent 8d299c7e91
commit c958119a48
3 changed files with 225 additions and 147 deletions
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255
Documentation/networking/device_drivers/aquantia/atlantic.txt → Documentation/networking/device_drivers/aquantia/atlantic.rst
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@ -1,9 +1,13 @@
Marvell(Aquantia) AQtion Driver for the aQuantia Multi-Gigabit PCI Express
Family of Ethernet Adapters
=============================================================================
.. SPDX-License-Identifier: GPL-2.0
.. include:: <isonum.txt>
Contents
========
===============================
Marvell(Aquantia) AQtion Driver
===============================
For the aQuantia Multi-Gigabit PCI Express Family of Ethernet Adapters
.. Contents
- Identifying Your Adapter
- Configuration
@ -16,32 +20,37 @@ Contents
Identifying Your Adapter
========================
The driver in this release is compatible with AQC-100, AQC-107, AQC-108 based ethernet adapters.
The driver in this release is compatible with AQC-100, AQC-107, AQC-108
based ethernet adapters.
SFP+ Devices (for AQC-100 based adapters)
----------------------------------
-----------------------------------------
This release tested with passive Direct Attach Cables (DAC) and SFP+/LC Optical Transceiver.
This release tested with passive Direct Attach Cables (DAC) and SFP+/LC
Optical Transceiver.
Configuration
=========================
=============
Viewing Link Messages
---------------------
Link messages will not be displayed to the console if the distribution is
restricting system messages. In order to see network driver link messages on
your console, set dmesg to eight by entering the following:
your console, set dmesg to eight by entering the following::
dmesg -n 8
NOTE: This setting is not saved across reboots.
.. note::
This setting is not saved across reboots.
Jumbo Frames
------------
The driver supports Jumbo Frames for all adapters. Jumbo Frames support is
enabled by changing the MTU to a value larger than the default of 1500.
The maximum value for the MTU is 16000. Use the `ip` command to
increase the MTU size. For example:
increase the MTU size. For example::
ip link set mtu 16000 dev enp1s0
@ -56,12 +65,16 @@ Configuration
NAPI (Rx polling mode) is supported in the atlantic driver.
Supported ethtool options
============================
=========================
Viewing adapter settings
---------------------
------------------------
::
ethtool <ethX>
Output example:
Output example::
Settings for enp1s0:
Supported ports: [ TP ]
@ -92,16 +105,22 @@ Supported ethtool options
Wake-on: d
Link detected: yes
---
Note: AQrate speeds (2.5/5 Gb/s) will be displayed only with linux kernels > 4.10.
But you can still use these speeds:
.. note::
AQrate speeds (2.5/5 Gb/s) will be displayed only with linux kernels > 4.10.
But you can still use these speeds::
ethtool -s eth0 autoneg off speed 2500
Viewing adapter information
---------------------
---------------------------
::
ethtool -i <ethX>
Output example:
Output example::
driver: atlantic
version: 5.2.0-050200rc5-generic-kern
@ -115,11 +134,15 @@ Supported ethtool options
supports-priv-flags: no
Viewing Ethernet adapter statistics:
---------------------
Viewing Ethernet adapter statistics
-----------------------------------
::
ethtool -S <ethX>
Output example:
Output example::
NIC statistics:
InPackets: 13238607
InUCast: 13293852
@ -165,76 +188,85 @@ Supported ethtool options
Queue[3] InErrors: 0
Interrupt coalescing support
---------------------------------
ITR mode, TX/RX coalescing timings could be viewed with:
----------------------------
ITR mode, TX/RX coalescing timings could be viewed with::
ethtool -c <ethX>
and changed with:
and changed with::
ethtool -C <ethX> tx-usecs <usecs> rx-usecs <usecs>
To disable coalescing:
To disable coalescing::
ethtool -C <ethX> tx-usecs 0 rx-usecs 0 tx-max-frames 1 tx-max-frames 1
Wake on LAN support
---------------------------------
-------------------
WOL support by magic packet:
WOL support by magic packet::
ethtool -s <ethX> wol g
To disable WOL:
To disable WOL::
ethtool -s <ethX> wol d
Set and check the driver message level
---------------------------------
--------------------------------------
Set message level
::
ethtool -s <ethX> msglvl <level>
Level values:
0x0001 - general driver status.
0x0002 - hardware probing.
0x0004 - link state.
0x0008 - periodic status check.
0x0010 - interface being brought down.
0x0020 - interface being brought up.
0x0040 - receive error.
0x0080 - transmit error.
0x0200 - interrupt handling.
0x0400 - transmit completion.
0x0800 - receive completion.
0x1000 - packet contents.
0x2000 - hardware status.
0x4000 - Wake-on-LAN status.
====== =============================
0x0001 general driver status.
0x0002 hardware probing.
0x0004 link state.
0x0008 periodic status check.
0x0010 interface being brought down.
0x0020 interface being brought up.
0x0040 receive error.
0x0080 transmit error.
0x0200 interrupt handling.
0x0400 transmit completion.
0x0800 receive completion.
0x1000 packet contents.
0x2000 hardware status.
0x4000 Wake-on-LAN status.
====== =============================
By default, the level of debugging messages is set 0x0001(general driver status).
Check message level
::
ethtool <ethX> | grep "Current message level"
If you want to disable the output of messages
If you want to disable the output of messages::
ethtool -s <ethX> msglvl 0
RX flow rules (ntuple filters)
---------------------------------
------------------------------
There are separate rules supported, that applies in that order:
1. 16 VLAN ID rules
2. 16 L2 EtherType rules
3. 8 L3/L4 5-Tuple rules
The driver utilizes the ethtool interface for configuring ntuple filters,
via "ethtool -N <device> <filter>".
via ``ethtool -N <device> <filter>``.
To enable or disable the RX flow rules:
To enable or disable the RX flow rules::
ethtool -K ethX ntuple <on|off>
@ -243,6 +275,7 @@ Supported ethtool options
be re-added when ntuple is re-enabled.
Because of the fixed order of the rules, the location of filters is also fixed:
- Locations 0 - 15 for VLAN ID filters
- Locations 16 - 31 for L2 EtherType filters
- Locations 32 - 39 for L3/L4 5-tuple filters (locations 32, 36 for IPv6)
@ -253,32 +286,34 @@ Supported ethtool options
addresses can be supported. Source and destination ports are only compared for
TCP/UDP/SCTP packets.
To add a filter that directs packet to queue 5, use <-N|-U|--config-nfc|--config-ntuple> switch:
To add a filter that directs packet to queue 5, use
``<-N|-U|--config-nfc|--config-ntuple>`` switch::
ethtool -N <ethX> flow-type udp4 src-ip 10.0.0.1 dst-ip 10.0.0.2 src-port 2000 dst-port 2001 action 5 <loc 32>
- action is the queue number.
- loc is the rule number.
For "flow-type ip4|udp4|tcp4|sctp4|ip6|udp6|tcp6|sctp6" you must set the loc
For ``flow-type ip4|udp4|tcp4|sctp4|ip6|udp6|tcp6|sctp6`` you must set the loc
number within 32 - 39.
For "flow-type ip4|udp4|tcp4|sctp4|ip6|udp6|tcp6|sctp6" you can set 8 rules
For ``flow-type ip4|udp4|tcp4|sctp4|ip6|udp6|tcp6|sctp6`` you can set 8 rules
for traffic IPv4 or you can set 2 rules for traffic IPv6. Loc number traffic
IPv6 is 32 and 36.
At the moment you can not use IPv4 and IPv6 filters at the same time.
Example filter for IPv6 filter traffic:
Example filter for IPv6 filter traffic::
sudo ethtool -N <ethX> flow-type tcp6 src-ip 2001:db8:0:f101::1 dst-ip 2001:db8:0:f101::2 action 1 loc 32
sudo ethtool -N <ethX> flow-type ip6 src-ip 2001:db8:0:f101::2 dst-ip 2001:db8:0:f101::5 action -1 loc 36
Example filter for IPv4 filter traffic:
Example filter for IPv4 filter traffic::
sudo ethtool -N <ethX> flow-type udp4 src-ip 10.0.0.4 dst-ip 10.0.0.7 src-port 2000 dst-port 2001 loc 32
sudo ethtool -N <ethX> flow-type tcp4 src-ip 10.0.0.3 dst-ip 10.0.0.9 src-port 2000 dst-port 2001 loc 33
sudo ethtool -N <ethX> flow-type ip4 src-ip 10.0.0.6 dst-ip 10.0.0.4 loc 34
If you set action -1, then all traffic corresponding to the filter will be discarded.
The maximum value action is 31.
@ -287,7 +322,8 @@ Supported ethtool options
from L2 Ethertype filter with UserPriority since both User Priority and VLAN ID
are passed in the same 'vlan' parameter.
To add a filter that directs packets from VLAN 2001 to queue 5:
To add a filter that directs packets from VLAN 2001 to queue 5::
ethtool -N <ethX> flow-type ip4 vlan 2001 m 0xF000 action 1 loc 0
@ -297,15 +333,15 @@ Supported ethtool options
distinguish VLAN filter from L2 Ethertype filter with UserPriority since both
User Priority and VLAN ID are passed in the same 'vlan' parameter.
To add a filter that directs IP4 packess of priority 3 to queue 3:
To add a filter that directs IP4 packess of priority 3 to queue 3::
ethtool -N <ethX> flow-type ether proto 0x800 vlan 0x600 m 0x1FFF action 3 loc 16
To see the list of filters currently present:
To see the list of filters currently present::
ethtool <-u|-n|--show-nfc|--show-ntuple> <ethX>
Rules may be deleted from the table itself. This is done using:
Rules may be deleted from the table itself. This is done using::
sudo ethtool <-N|-U|--config-nfc|--config-ntuple> <ethX> delete <loc>
@ -317,33 +353,36 @@ Supported ethtool options
appropriate queue. RX filters is supported on all kernels 2.6.30 and later.
RSS for UDP
---------------------------------
-----------
Currently, NIC does not support RSS for fragmented IP packets, which leads to
incorrect working of RSS for fragmented UDP traffic. To disable RSS for UDP the
RX Flow L3/L4 rule may be used.
Example:
Example::
ethtool -N eth0 flow-type udp4 action 0 loc 32
UDP GSO hardware offload
---------------------------------
------------------------
UDP GSO allows to boost UDP tx rates by offloading UDP headers allocation
into hardware. A special userspace socket option is required for this,
could be validated with /kernel/tools/testing/selftests/net/
could be validated with /kernel/tools/testing/selftests/net/::
udpgso_bench_tx -u -4 -D 10.0.1.1 -s 6300 -S 100
Will cause sending out of 100 byte sized UDP packets formed from single
6300 bytes user buffer.
UDP GSO is configured by:
UDP GSO is configured by::
ethtool -K eth0 tx-udp-segmentation on
Private flags (testing)
---------------------------------
-----------------------
Atlantic driver supports private flags for hardware custom features:
Atlantic driver supports private flags for hardware custom features::
$ ethtool --show-priv-flags ethX
@ -354,7 +393,7 @@ Supported ethtool options
PHYInternalLoopback: off
PHYExternalLoopback: off
Example:
Example::
$ ethtool --set-priv-flags ethX DMASystemLoopback on
@ -370,93 +409,130 @@ Command Line Parameters
The following command line parameters are available on atlantic driver:
aq_itr -Interrupt throttling mode
----------------------------------------
---------------------------------
Accepted values: 0, 1, 0xFFFF
Default value: 0xFFFF
0 - Disable interrupt throttling.
1 - Enable interrupt throttling and use specified tx and rx rates.
0xFFFF - Auto throttling mode. Driver will choose the best RX and TX
====== ==============================================================
0 Disable interrupt throttling.
1 Enable interrupt throttling and use specified tx and rx rates.
0xFFFF Auto throttling mode. Driver will choose the best RX and TX
interrupt throtting settings based on link speed.
====== ==============================================================
aq_itr_tx - TX interrupt throttle rate
----------------------------------------
--------------------------------------
Accepted values: 0 - 0x1FF
Default value: 0
TX side throttling in microseconds. Adapter will setup maximum interrupt delay
to this value. Minimum interrupt delay will be a half of this value
aq_itr_rx - RX interrupt throttle rate
----------------------------------------
--------------------------------------
Accepted values: 0 - 0x1FF
Default value: 0
RX side throttling in microseconds. Adapter will setup maximum interrupt delay
to this value. Minimum interrupt delay will be a half of this value
Note: ITR settings could be changed in runtime by ethtool -c means (see below)
.. note::
ITR settings could be changed in runtime by ethtool -c means (see below)
Config file parameters
=======================
======================
For some fine tuning and performance optimizations,
some parameters can be changed in the {source_dir}/aq_cfg.h file.
AQ_CFG_RX_PAGEORDER
----------------------------------------
-------------------
Default value: 0
RX page order override. Thats a power of 2 number of RX pages allocated for
each descriptor. Received descriptor size is still limited by AQ_CFG_RX_FRAME_MAX.
each descriptor. Received descriptor size is still limited by
AQ_CFG_RX_FRAME_MAX.
Increasing pageorder makes page reuse better (actual on iommu enabled systems).
AQ_CFG_RX_REFILL_THRES
----------------------------------------
----------------------
Default value: 32
RX refill threshold. RX path will not refill freed descriptors until the
specified number of free descriptors is observed. Larger values may help
better page reuse but may lead to packet drops as well.
AQ_CFG_VECS_DEF
------------------------------------------------------------
---------------
Number of queues
Valid Range: 0 - 8 (up to AQ_CFG_VECS_MAX)
Default value: 8
Notice this value will be capped by the number of cores available on the system.
AQ_CFG_IS_RSS_DEF
------------------------------------------------------------
-----------------
Enable/disable Receive Side Scaling
This feature allows the adapter to distribute receive processing
across multiple CPU-cores and to prevent from overloading a single CPU core.
Valid values
0 - disabled
1 - enabled
== ========
0 disabled
1 enabled
== ========
Default value: 1
AQ_CFG_NUM_RSS_QUEUES_DEF
------------------------------------------------------------
-------------------------
Number of queues for Receive Side Scaling
Valid Range: 0 - 8 (up to AQ_CFG_VECS_DEF)
Default value: AQ_CFG_VECS_DEF
AQ_CFG_IS_LRO_DEF
------------------------------------------------------------
-----------------
Enable/disable Large Receive Offload
This offload enables the adapter to coalesce multiple TCP segments and indicate
them as a single coalesced unit to the OS networking subsystem.
The system consumes less energy but it also introduces more latency in packets processing.
The system consumes less energy but it also introduces more latency in packets
processing.
Valid values
0 - disabled
1 - enabled
== ========
0 disabled
1 enabled
== ========
Default value: 1
AQ_CFG_TX_CLEAN_BUDGET
----------------------------------------
----------------------
Maximum descriptors to cleanup on TX at once.
Default value: 256
After the aq_cfg.h file changed the driver must be rebuilt to take effect.
@ -472,7 +548,8 @@ License
=======
aQuantia Corporation Network Driver
Copyright(c) 2014 - 2019 aQuantia Corporation.
Copyright |copy| 2014 - 2019 aQuantia Corporation.
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,

1
Documentation/networking/device_drivers/index.rst
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@ -30,6 +30,7 @@ Contents:
3com/3c509
3com/vortex
amazon/ena
aquantia/atlantic
.. only:: subproject and html

2
MAINTAINERS
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@ -1275,7 +1275,7 @@ L: netdev@vger.kernel.org
S: Supported
W: https://www.marvell.com/
Q: http://patchwork.ozlabs.org/project/netdev/list/
F: Documentation/networking/device_drivers/aquantia/atlantic.txt
F: Documentation/networking/device_drivers/aquantia/atlantic.rst
F: drivers/net/ethernet/aquantia/atlantic/
AQUANTIA ETHERNET DRIVER PTP SUBSYSTEM