NAME

       ixl — Intel XL710 Ethernet 40Gb Base driver

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device ixl

       To load the driver as a module at boot time, place the following lines in loader.conf(5):

             if_ixl_load="YES"

DESCRIPTION

       The ixl driver provides support for PCI Express adapters or LOMs in the XL710 Family of ethernet devices.
       The  driver  supports Jumbo Frames, TX/RX checksum offload, TCP segmentation offload (TSO), Large Receive
       Offload (LRO), VLAN tag insertion/extraction, VLAN checksum offload, VLAN TSO, and Receive Side  Steering
       (RSS),  all  for  both IPv4 and IPv6.  For further hardware information and questions related to hardware
       requirements, see http://support.intel.com/.

       Support for Jumbo Frames is provided via the interface MTU setting.  Selecting an MTU  larger  than  1500
       bytes  with  the  ifconfig(8)  utility  configures the adapter to receive and transmit Jumbo Frames.  The
       maximum MTU size for Jumbo Frames is 9706.

       Offloads are also controlled via the interface, for instance, checksumming for both IPv4 and IPv6 can  be
       set and unset, TSO4 and/or TSO6, and finally LRO can be set and unset.

       For more information on configuring this device, see ifconfig(8).

HARDWARE

       The ixl driver supports these SFP+ Pluggable Optics:

       •   Intel TRIPLE RATE 1G/10G/40G QSFP+ SR (bailed) E40GQSFPSR
       •   Intel TRIPLE RATE 1G/10G/40G QSFP+ SR (bailed) E40GQSFPLR

       The ixl driver supports 10Gb and 1Gb Ethernet adapters with SR Modules:

       •   Intel DUAL RATE 1G/10G SFP+ SR (bailed) FTLX8571D3BCV-IT
       •   Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDZ-IN2

       The ixl driver supports 10Gb and 1Gb Ethernet adapters with LR Modules:

       •   Intel DUAL RATE 1G/10G SFP+ LR (bailed) FTLX1471D3BCV-IT
       •   Intel DUAL RATE 1G/10G SFP+ LR (bailed) AFCT-701SDZ-IN2

       Note  that  X710/XL710  Based  SFP+  adapters  also support all passive and active limiting direct attach
       cables that comply with SFF-8431 v4.1 and SFF-8472 v10.4 specifications.

LOADER TUNABLES

       Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).

       hw.ixl.enable_msix
               Allows one to enable/disable MSIX, thus forcing MSI instead.

       hw.ixl.ringsz
               Set the number of descriptors in the rings, note that this changes BOTH the TX and RX rings, they
               cannot be set independently.

       hw.ixl.max_queues
               Set the number of queues (each a TX/RX pair) for the  port,  this  allows  one  to  override  the
               autocalculation if it is set to 0.

       hw.ixl.dynamic_rx_itr
               The dynamic RX interrupt control, set to 1 to enable.

       hw.ixl.dynamic_tx_itr
               The dynamic TX interrupt control, set to 1 to enable.

       hw.ixl.rx_itr
               The RX interrupt rate value, set to 8K by default.

       hw.ixl.tx_itr
               The TX interrupt rate value, set to 4K by default.

SYSCTL PROCEDURES

       hw.ixl.fc
               Allows  one to set the flow control value.  A value of 0 disables flow control, 3 enables full, 1
               is RX, and 2 is TX pause.

       hw.ixl.advertise_speed
               Allows one to set advertised link speeds, this will then cause a link  renegotiation.   With  the
               appropriate adapter this can cause a link at 10GB, 1GB, or 100MB.

       hw.ixl.current_speed
               This is a display of the current setting.

       hw.ixl.fw_version
               This is a display of the Firmware version.

Interrupt Storms

       It  is  important  to  note that 40G operation can generate high numbers of interrupts, often incorrectly
       being interpreted as a storm condition in the kernel.  It is suggested that this be resolved by setting:

       hw.intr_storm_threshold: 0

SUPPORT

       For general information and support, go to the Intel support website at: http://support.intel.com/.

       If an issue is identified with this driver with a supported adapter, email all the  specific  information
       related to the issue to ⟨freebsd@intel.com⟩.

SEE ALSO

       arp(4), ixlv(4), netintro(4), ng_ether(4), vlan(4), ifconfig(8)

HISTORY

       The ixl device driver first appeared in FreeBSD 10.1.

AUTHORS

       The ixl driver was written by Jack Vogel <jfv@FreeBSD.org> and Eric Joyner <ricera10@gmail.com>.

Debian                                           March 25, 2015                                           IXL(4)