2 .\" Copyright 2021 Intel Corp
3 .\" Copyright 2021 Rubicon Communications, LLC (Netgate)
4 .\" SPDX-License-Identifier: BSD-3-Clause
13 .Nd "Intel Ethernet Controller I225 driver"
15 To compile this driver into the kernel,
16 place the following lines in your
17 kernel configuration file:
18 .Bd -ragged -offset indent
23 Alternatively, to load the driver as a
24 module at boot time, place the following line in
26 .Bd -literal -offset indent
32 driver provides support for any PCI Express adapter or LOM (LAN
33 On Motherboard) based on the Intel I225 Multi Gigabit Controller.
34 The driver supports Transmit/Receive checksum offload, Jumbo Frames,
35 MSI/MSI-X, TSO, and RSS.
37 Support for Jumbo Frames is provided via the interface MTU setting.
38 Selecting an MTU larger than 1500 bytes with the
41 configures the adapter to receive and transmit Jumbo Frames.
42 The maximum MTU size for Jumbo Frames is 9216 bytes.
44 This driver version supports VLAN hardware insertion / extraction, and
45 VLAN checksum offload.
46 For information on enabling VLANs, see
50 driver supports the following media types:
51 .Bl -tag -width ".Cm 10baseT/UTP"
53 Enables auto-negotiation for speed and duplex.
55 Sets 10Mbps operation.
62 Sets 100Mbps operation.
69 Sets 1000Mbps operation.
72 mode is supported at this speed.
74 Sets 2500Mbps operation.
77 mode is supported at this speed.
82 driver supports the following models:
95 Tunables can be set at the
97 prompt before booting the kernel or stored in
99 .Bl -tag -width indent
100 .It Va hw.igc.igc_disable_crc_stripping
101 Disable or enable hardware stripping of CRC field.
102 This is mostly useful on BMC/IPMI shared interfaces where stripping the
103 CRC causes remote access over IPMI to fail.
105 .It Va hw.igc.rx_int_delay
106 This value delays the generation of receive interrupts in units
107 of 1.024 microseconds.
108 The default value is 0, since adapters may hang with this feature being
110 .It Va hw.igc.rx_abs_int_delay
111 If hw.igc.rx_int_delay is non-zero, this tunable limits the
112 maximum delay in which a receive interrupt is generated.
113 .It Va hw.igc.tx_int_delay
114 This value delays the generation of transmit interrupts in units
115 of 1.024 microseconds.
116 The default value is 64.
117 .It Va hw.igc.tx_abs_int_delay
118 If hw.igc.tx_int_delay is non-zero, this tunable limits the
119 maximum delay in which a transmit interrupt is generated.
121 Show bad packets when in promiscuous mode.
123 .It Va hw.igc.rx_process_limit
124 Maximum number of received packets to process at a time.
126 A value of -1 means unlimited.
127 .It Va hw.igc.eee_setting
128 Disable or enable Energy Efficient Ethernet.
129 Default 1 (disabled).
130 .It Va hw.igc.max_interrupt_rate
131 Maximum device interrupts per second.
136 .It "igc%d: Hardware Initialization Failed"
137 A fatal initialization error has occurred.
138 .It "igc%d: Unable to allocate bus resource: memory"
139 A fatal initialization error has occurred.
140 .It "igc%d: Invalid MAC address"
141 The MAC address programmed into the EEPROM is either empty or a multicast/broadcast
155 device driver first appeared in
161 was originally written by
162 .An Intel Corporation