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.
83 driver supports the following models:
96 Tunables can be set at the
98 prompt before booting the kernel or stored in
100 .Bl -tag -width indent
101 .It Va hw.igc.igc_disable_crc_stripping
102 Disable or enable hardware stripping of CRC field.
103 This is mostly useful on BMC/IPMI shared interfaces where stripping the
104 CRC causes remote access over IPMI to fail.
106 .It Va hw.igc.rx_int_delay
107 This value delays the generation of receive interrupts in units
108 of 1.024 microseconds.
109 The default value is 0, since adapters may hang with this feature being
111 .It Va hw.igc.rx_abs_int_delay
112 If hw.igc.rx_int_delay is non-zero, this tunable limits the
113 maximum delay in which a receive interrupt is generated.
114 .It Va hw.igc.tx_int_delay
115 This value delays the generation of transmit interrupts in units
116 of 1.024 microseconds.
117 The default value is 64.
118 .It Va hw.igc.tx_abs_int_delay
119 If hw.igc.tx_int_delay is non-zero, this tunable limits the
120 maximum delay in which a transmit interrupt is generated.
122 Show bad packets when in promiscuous mode.
124 .It Va hw.igc.rx_process_limit
125 Maximum number of received packets to process at a time.
127 A value of -1 means unlimited.
128 .It Va hw.igc.eee_setting
129 Disable or enable Energy Efficient Ethernet.
130 Default 1 (disabled).
131 .It Va hw.igc.max_interrupt_rate
132 Maximum device interrupts per second.
137 .It "igc%d: Hardware Initialization Failed"
138 A fatal initialization error has occurred.
139 .It "igc%d: Unable to allocate bus resource: memory"
140 A fatal initialization error has occurred.
141 .It "igc%d: Invalid MAC address"
142 The MAC address programmed into the EEPROM is either empty or a multicast/broadcast
156 device driver first appeared in
162 was originally written by
163 .An Intel Corporation