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

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

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

  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 ]

    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

  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

     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>

 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)

 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.

 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

 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:

 ethtool -N <ethX> flow-type ether proto 0x800 vlan 0x600 m 0x1FFF action 3 loc 16

 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>

 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

	PHYInternalLoopback: off

	PHYExternalLoopback: off

 Example:

 Example::

	$ ethtool --set-priv-flags ethX DMASystemLoopback on

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.

=======

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,

   3com/3c509

   3com/vortex

   amazon/ena

   aquantia/atlantic

.. only::  subproject and html

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