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download PDF document: igc.4.pdf

IGC(4) FreeBSD Kernel Interfaces Manual IGC(4)
NAME igc - Intel Ethernet Controller I225 driver
SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file:
device iflib device igc
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_igc_load="YES"
DESCRIPTION The igc driver provides support for any PCI Express adapter or LOM (LAN On Motherboard) based on the Intel I225 Multi Gigabit Controller. The driver supports Transmit/Receive checksum offload, Jumbo Frames, MSI/MSI- X, TSO, and RSS.
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 9216 bytes.
This driver version supports VLAN hardware insertion / extraction, and VLAN checksum offload. For information on enabling VLANs, see ifconfig(8). The igc driver supports the following media types:
autoselect Enables auto-negotiation for speed and duplex.
10baseT/UTP Sets 10Mbps operation. Use the mediaopt option to select half-duplex mode.
100baseTX Sets 100Mbps operation. Use the mediaopt option to select half-duplex mode.
1000baseT Sets 1000Mbps operation. Only full-duplex mode is supported at this speed.
2500baseT Sets 2500Mbps operation. Only full-duplex mode is supported at this speed.
HARDWARE The igc driver supports the following models:
o I225-LM o I225-V o I225-IT o I225-K
LOADER TUNABLES Tunables can be set at the loader(8) prompt before booting the kernel or stored in loader.conf(5).
hw.igc.igc_disable_crc_stripping may hang with this feature being enabled.
hw.igc.rx_abs_int_delay If hw.igc.rx_int_delay is non-zero, this tunable limits the maximum delay in which a receive interrupt is generated.
hw.igc.tx_int_delay This value delays the generation of transmit interrupts in units of 1.024 microseconds. The default value is 64.
hw.igc.tx_abs_int_delay If hw.igc.tx_int_delay is non-zero, this tunable limits the maximum delay in which a transmit interrupt is generated.
hw.igc.sbp Show bad packets when in promiscuous mode. Default is false.
hw.igc.rx_process_limit Maximum number of received packets to process at a time. Default is 100. A value of -1 means unlimited.
hw.igc.eee_setting Disable or enable Energy Efficient Ethernet. Default 1 (disabled).
hw.igc.max_interrupt_rate Maximum device interrupts per second. The default is 8000.
DIAGNOSTICS igc%d: Hardware Initialization Failed A fatal initialization error has occurred.
igc%d: Unable to allocate bus resource: memory A fatal initialization error has occurred.
igc%d: Invalid MAC address The MAC address programmed into the EEPROM is either empty or a multicast/broadcast address.
SEE ALSO altq(4), arp(4), iflib(4), netintro(4), ng_ether(4), vlan(4), ifconfig(8)
HISTORY The igc device driver first appeared in FreeBSD 14.0.
AUTHORS The igc was originally written by Intel Corporation and converted to the iflib(4) framework by Netgate.
FreeBSD 14.0-RELEASE-p11 May 10, 2021 FreeBSD 14.0-RELEASE-p11