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