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IXL(4) FreeBSD Kernel Interfaces Manual IXL(4) 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 require- ments, 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 con- figures 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, checksum- ming 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: +o Intel TRIPLE RATE 1G/10G/40G QSFP+ SR (bailed) E40GQSFPSR +o Intel TRIPLE RATE 1G/10G/40G QSFP+ SR (bailed) E40GQSFPLR The ixl driver supports 10Gb and 1Gb Ethernet adapters with SR Modules: +o Intel DUAL RATE 1G/10G SFP+ SR (bailed) FTLX8571D3BCV-IT +o Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDZ-IN2 The ixl driver supports 10Gb and 1Gb Ethernet adapters with LR Modules: +o Intel DUAL RATE 1G/10G SFP+ LR (bailed) FTLX1471D3BCV-IT +o 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 indepen- dently. 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>. FreeBSD 11.1 March 25, 2015 FreeBSD 11.1
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | LOADER TUNABLES | SYSCTL PROCEDURES | Interrupt Storms | SUPPORT | SEE ALSO | HISTORY | AUTHORS
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