Linux* aQuantia AQtion Driver for the aQuantia Multi-Gigabit PCI Express Family of
Ethernet Adapters
=============================================================================
Contents
========
- Important Note
- In This Release
- Identifying Your Adapter
- Building and Installation
- Command Line Parameters
- Additional Configurations
- Support
IMPORTANT NOTE
==============
WARNING: The AQtion driver compiles by default with the LRO (Large Receive
Offload) feature enabled. This option offers the lowest CPU utilization for
receives, but is completely incompatible with *routing/ip forwarding* and
*bridging*. If enabling ip forwarding or bridging is a requirement, it is
necessary to disable LRO using compile time options as noted in the LRO
section later in this document. The result of not disabling LRO when combined
with ip forwarding or bridging can be low throughput or even a kernel panic.
In This Release
===============
This file describes the aQuantia AQtion Driver for the aQuantia Multi-Gigabit PCI Express Family of
Ethernet Adapters. This driver supports the linux kernels >= 3.10,
and includes support for x86_64 and ARM Linux system.
This release contains source tarball and (optional) src.rpm package.
Identifying Your Adapter
========================
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.
Building and Installation
=========================
To manually build this driver:
------------------------------------------------------------
1. Make sure you have all the environment to build standalone kernel module.
On debian based systems you may do the following:
sudo apt install linux-headers build-essential
2. Move the base driver tar file to the directory of your choice. For example,
use /home/username/aquantia.
Untar/unzip archive:
cd ~/aquantia
tar zxf Aquantia-AQtion-x.y.z.tar.gz
3. Change to the driver src directory:
cd Aquantia-AQtion-x.y.z/
4. Compile the driver module:
make
5. Load the module:
sudo insmod atlantic.ko
6. Unload the driver
sudo rmmod atlantic
7. Install the driver in the system
make && make install
driver will be in:
/lib/modules/`uname -r`/aquantia/atlantic.ko
8. Uninstall the driver:
make uninstall
or run the following commands:
sudo rm -f /lib/modules/`uname -r`/aquantia/atlantic.ko
depmod -a `uname -r`
Alternatively build and install driver with dkms
------------------------------------------------------------
1. Make sure you have all the environment to build standalone kernel module.
On debian based systems you may do the following:
sudo apt-get install linux-headers-`uname -r` build-essential gawk dkms
On redhat based systems you may do the following:
sudo yum install kernel-devel-`uname -r` gcc gcc-c++ make gawk dkms
2. Move the base driver tar file to the directory of your choice. For example,
use /home/username/aquantia.
Untar/unzip archive:
cd ~/aquantia
tar zxf Aquantia-AQtion-x.y.z.tar.gz
3. Change to the driver source directory:
cd Aquantia-AQtion-x.y.z/
4. Build and install driver:
sudo ./dkms.sh install
driver will be in:
/lib/modules/`uname -r`/updates/dkms/atlantic.ko
5. Uninstall the driver:
sudo ./dkms.sh uninstall
Install driver on Debian\Ubuntu using atlantic-x.y.z.deb
------------------------------------------------------------
1. Make sure you have all the environment to build standalone kernel module. Execute the commands:
sudo apt-get install linux-headers-`uname -r`
2. Move the atlantic-x.y.z.deb file to the directory of your choice. For example,
use /home/username/aquantia.
3. Execute the commands:
cd /home/username/aquantia
sudo apt-get install ./atlantic-x.y.z.deb
After this driver will be installed.
(You can check this via "dpkg -l | grep -i atlantic")
4. Uninstall the driver:
Run the following commands:
sudo dpkg -P atlantic
Alternatively you can use atlantic-x.y.z.noarch.rpm
------------------------------------------------------------
1. Make sure you have all the environment to build standalone kernel module. Execute the commands:
sudo yum install kernel-devel-`uname -r`
2. Move the atlantic-x.y.z.noarch.rpm file to the directory of your choice. For example,
use /home/username/aquantia.
3. Execute the commands:
cd /home/username/aquantia
sudo yum install ./atlantic-x.y.z.noarch.rpm
After this driver will be installed.
(You can check this via "rpm -qa | grep -i atlantic")
4. Uninstall the driver:
Run the following commands:
sudo rpm -e atlantic-x.y.z.noarch
Check that the driver is working
------------------------------------------------------------
1. Verify ethernet interface appears:
ifconfig
or
ip addr show
If no new interface appears, check dmesg output.
If you see "Bad firmware detected" please update firmware on your ethernet card.
2. Assign an IP address to the interface by entering the following, where
x is the interface number:
ifconfig ethX <IP_address> netmask <netmask>
or
ip addr add <IP_address> dev <DEV>
3. Verify that the interface works. Enter the following, where <IP_address>
is the IP address for another machine on the same subnet as the interface
that is being tested:
ping <IP_address>
or (for IPv6)
ping6 <IPv6_address>
4. Check the correct version of the driver is active (assume interface is eth1):
ethtool -i eth1
Troubleshooting
-----------------------
Some distributions do not provide kernel sources ready for thirdparty module build.
In general, the following could be used to prepare kernel source tree for build:
sudo su
cd /lib/modules/`uname -r`/build
make oldconfig
make prepare
make modules_prepare
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
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)
aq_rxpageorder
----------------------------------------
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.
Increasing pageorder makes page reuse better (actual on iommu enabled systems).
aq_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.
Config file parametes
=======================
Some parameters can be changed in the {source_dir}/aq_cfg.h file:
AQ_CFG_VECS_DEF
------------------------------------------------------------
Number of queues
Valid Range: 0 - 8 (up to AQ_CFG_VECS_MAX)
Default value: 4
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
Default value: 1
AQ_CFG_NUM_RSS_QUEUES_DEF
------------------------------------------------------------
Number of queues for Receive Side Scaling
Valid Range: 0 - 4 (up to AQ_CFG_VECS_DEF)
Default value: 4
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.
Valid values
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.
Additional Configurations
=========================
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:
dmesg -n 8
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 ifconfig command to
increase the MTU size. For example:
ifconfig <ethX> mtu 9000 up
ethtool
-------
The driver utilizes the ethtool interface for driver configuration and
diagnostics, as well as displaying statistical information. The latest
ethtool version is required for this functionality.
NAPI
----
NAPI (Rx polling mode) is supported in the atlantic driver.
See ftp://robur.slu.se/pub/Linux/net-development/NAPI/usenix-paper.tgz for
more information on NAPI.
Supported ethtool options
============================
Viewing adapter settings
---------------------
ethtool <ethX>
Output example:
Settings for enp1s0:
Supported ports: [ ]
Supported link modes: 100baseT/Full
1000baseT/Full
10000baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Advertised link modes: 100baseT/Full
1000baseT/Full
10000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Speed: 10000Mb/s
Duplex: Full
Port: FIBRE
PHYAD: 0
Transceiver: external
Auto-negotiation: on
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:
ethtool -s eth0 autoneg off speed 2500
Viewing adapter information
---------------------
ethtool -i <ethX>
Output example:
driver: atlantic
version: 1.6.9.0
firmware-version: 1.5.49
expansion-rom-version:
bus-info: 0000:01:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no
Viewing Ethernet adapter statistics:
---------------------
ethtool -S <ethX>
Output example:
NIC statistics:
InPackets: 13238607
InUCast: 13293852
InMCast: 52
InBCast: 3
InErrors: 0
OutPackets: 23703019
OutUCast: 23704941
OutMCast: 67
OutBCast: 11
InUCastOctects: 213182760
OutUCastOctects: 22698443
InMCastOctects: 6600
OutMCastOctects: 8776
InBCastOctects: 192
OutBCastOctects: 704
InOctects: 2131839552
OutOctects: 226938073
InPacketsDma: 95532300
OutPacketsDma: 59503397
InOctetsDma: 1137102462
OutOctetsDma: 2394339518
InDroppedDma: 0
Queue[0] InPackets: 23567131
Queue[0] OutPackets: 20070028
Queue[0] InJumboPackets: 0
Queue[0] InLroPackets: 0
Queue[0] InErrors: 0
Queue[1] InPackets: 45428967
Queue[1] OutPackets: 11306178
Queue[1] InJumboPackets: 0
Queue[1] InLroPackets: 0
Queue[1] InErrors: 0
Queue[2] InPackets: 3187011
Queue[2] OutPackets: 13080381
Queue[2] InJumboPackets: 0
Queue[2] InLroPackets: 0
Queue[2] InErrors: 0
Queue[3] InPackets: 23349136
Queue[3] OutPackets: 15046810
Queue[3] InJumboPackets: 0
Queue[3] InLroPackets: 0
Queue[3] InErrors: 0
Disable GRO when routing/bridging
---------------------------------
Due to a known kernel issue, GRO must be turned off when routing/bridging.
Its can be done with command:
ethtool -K <ethX> gro off
Disable LRO when routing/bridging
---------------------------------
Due to a known kernel issue, LRO must be turned off when routing/bridging.
Its can be done with command:
ethtool -K <ethX> lro off
Interrupt coalescing support
---------------------------------
ITR mode, TX/RX coalescing timings could be viewed with:
ethtool -c <ethX>
and changed with:
ethtool -C <ethX> tx-usecs <usecs> rx-usecs <usecs>
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:
ethtool -s <ethX> wol g
To disable WOL:
ethtool -s <ethX> wol d
Private flags (testing)
---------------------------------
Atlantic driver supports private flags for hardware loopback testing:
$ ethtool --show-priv-flags ethX
Private flags for ethX:
DMASystemLoopback : off
PKTSystemLoopback : off
DMANetworkLoopback : off
PHYInternalLoopback: off
PHYExternalLoopback: off
Example:
$ ethtool --set-priv-flags ethX DMASystemLoopback on
DMASystemLoopback: DMA Host loopback.
PKTSystemLoopback: Packet buffer host loopback.
DMANetworkLoopback: Network side loopback on DMA block.
PHYInternalLoopback: Internal loopback on Phy.
PHYExternalLoopback: External loopback on Phy (with loopback ethernet cable).
Support
=======
If an issue is identified with the released source code on the supported
kernel with a supported adapter, email the specific information related
to the issue to support@aquantia.com
License
=======
aQuantia Corporation Network Driver
Copyright(c) 2014 - 2018 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,
version 2, as published by the Free Software Foundation.
Steve Groesz
13b6b5b6cf