1.\" Copyright (c) 2009 Pyun YongHyeon 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd August 9, 2010 28.Dt ALC 4 29.Os 30.Sh NAME 31.Nm alc 32.Nd Atheros AR813x/AR815x Gigabit/Fast Ethernet driver 33.Sh SYNOPSIS 34To compile this driver into the kernel, 35place the following lines in your 36kernel configuration file: 37.Bd -ragged -offset indent 38.Cd "device miibus" 39.Cd "device alc" 40.Ed 41.Pp 42Alternatively, to load the driver as a 43module at boot time, place the following line in 44.Xr loader.conf 5 : 45.Bd -literal -offset indent 46if_alc_load="YES" 47.Ed 48.Sh DESCRIPTION 49The 50.Nm 51device driver provides support for Atheros AR813x and AR815x PCI 52Express Gigabit/Fast Ethernet controllers. 53.Pp 54All LOMs supported by the 55.Nm 56driver have TCP/UDP/IP checksum offload for transmit, TCP 57segmentation offload (TSO), hardware VLAN tag stripping/insertion 58features, Wake On Lan (WOL) and an interrupt moderation mechanism 59as well as a 64-bit multicast hash filter. 60.Pp 61The AR813x and AR815x supports Jumbo Frames (up to 9216 and 6144 62bytes, respectively), which can be configured via the interface 63MTU setting. 64Selecting an MTU larger than 1500 bytes with the 65.Xr ifconfig 8 66utility configures the adapter to receive and transmit Jumbo Frames. 67.Pp 68The 69.Nm 70driver supports the following media types: 71.Bl -tag -width ".Cm 10baseT/UTP" 72.It Cm autoselect 73Enable autoselection of the media type and options. 74The user can manually override 75the autoselected mode by adding media options to 76.Xr rc.conf 5 . 77.It Cm 10baseT/UTP 78Set 10Mbps operation. 79.It Cm 100baseTX 80Set 100Mbps (Fast Ethernet) operation. 81.It Cm 1000baseTX 82Set 1000baseTX operation over twisted pair. 83.El 84.Pp 85The 86.Nm 87driver supports the following media options: 88.Bl -tag -width ".Cm full-duplex" 89.It Cm full-duplex 90Force full duplex operation. 91.It Cm half-duplex 92Force half duplex operation. 93.El 94.Pp 95For more information on configuring this device, see 96.Xr ifconfig 8 . 97.Sh HARDWARE 98The 99.Nm 100device driver provides support for the following Ethernet controllers: 101.Pp 102.Bl -bullet -compact 103.It 104Atheros AR8131 PCI Express Gigabit Ethernet controller 105.It 106Atheros AR8132 PCI Express Fast Ethernet controller 107.It 108Atheros AR8151 v1.0 PCI Express Gigabit Ethernet controller 109.It 110Atheros AR8151 v2.0 PCI Express Gigabit Ethernet controller 111.It 112Atheros AR8152 v1.1 PCI Express Fast Ethernet controller 113.It 114Atheros AR8152 v2.0 PCI Express Fast Ethernet controller 115.El 116.Sh LOADER TUNABLES 117Tunables can be set at the 118.Xr loader 8 119prompt before booting the kernel or stored in 120.Xr loader.conf 5 . 121.Bl -tag -width "xxxxxx" 122.It Va hw.alc.msi_disable 123This tunable disables MSI support on the Ethernet hardware. 124The default value is 0. 125.It Va hw.alc.msix_disable 126This tunable disables MSI-X support on the Ethernet hardware. 127The default value is 0. 128.El 129.Sh SYSCTL VARIABLES 130The following variables are available as both 131.Xr sysctl 8 132variables and 133.Xr loader 8 134tunables: 135.Bl -tag -width "xxxxxx" 136.It Va dev.alc.%d.int_rx_mod 137Maximum amount of time to delay receive interrupt processing in 138units of 1us. 139The accepted range is 0 to 130000, the default is 100(100us). 140Value 0 completely disables the interrupt moderation. 141.It Va dev.alc.%d.int_tx_mod 142Maximum amount of time to delay transmit interrupt processing in 143units of 1us. 144The accepted range is 0 to 130000, the default is 1000(1ms). 145Value 0 completely disables the interrupt moderation. 146.It Va dev.alc.%d.process_limit 147Maximum amount of Rx frames to be processed in the event loop before 148rescheduling a taskqueue. 149The accepted range is 32 to 255, the default value is 64 events. 150The interface does not need to be brought down and up again before 151a change takes effect. 152.El 153.Sh SEE ALSO 154.Xr altq 4 , 155.Xr arp 4 , 156.Xr miibus 4 , 157.Xr netintro 4 , 158.Xr ng_ether 4 , 159.Xr vlan 4 , 160.Xr ifconfig 8 161.Sh HISTORY 162The 163.Nm 164driver was written by 165.An Pyun YongHyeon 166.Aq yongari@FreeBSD.org . 167It first appeared in 168.Fx 8.0 . 169