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32 .Nd Atheros AR813x/AR815x Gigabit/Fast Ethernet driver
34 To compile this driver into the kernel,
35 place the following lines in your
36 kernel configuration file:
37 .Bd -ragged -offset indent
42 Alternatively, to load the driver as a
43 module at boot time, place the following line in
45 .Bd -literal -offset indent
51 device driver provides support for Atheros AR813x and AR815x PCI
52 Express Gigabit/Fast Ethernet controllers.
54 All LOMs supported by the
56 driver have TCP/UDP/IP checksum offload for transmit, TCP
57 segmentation offload (TSO), hardware VLAN tag stripping/insertion
58 features, Wake On Lan (WOL) and an interrupt moderation mechanism
59 as well as a 64-bit multicast hash filter.
61 The AR813x and AR815x supports Jumbo Frames (up to 9216 and 6144
62 bytes, respectively), which can be configured via the interface
64 Selecting an MTU larger than 1500 bytes with the
66 utility configures the adapter to receive and transmit Jumbo Frames.
70 driver supports the following media types:
71 .Bl -tag -width ".Cm 10baseT/UTP"
73 Enable autoselection of the media type and options.
74 The user can manually override
75 the autoselected mode by adding media options to
80 Set 100Mbps (Fast Ethernet) operation.
82 Set 1000baseTX operation over twisted pair.
87 driver supports the following media options:
88 .Bl -tag -width ".Cm full-duplex"
90 Force full duplex operation.
92 Force half duplex operation.
95 For more information on configuring this device, see
100 device driver provides support for the following Ethernet controllers:
104 Atheros AR8131 PCI Express Gigabit Ethernet controller
106 Atheros AR8132 PCI Express Fast Ethernet controller
108 Atheros AR8151 v1.0 PCI Express Gigabit Ethernet controller
110 Atheros AR8151 v2.0 PCI Express Gigabit Ethernet controller
112 Atheros AR8152 v1.1 PCI Express Fast Ethernet controller
114 Atheros AR8152 v2.0 PCI Express Fast Ethernet controller
117 Tunables can be set at the
119 prompt before booting the kernel or stored in
121 .Bl -tag -width "xxxxxx"
122 .It Va hw.alc.msi_disable
123 This tunable disables MSI support on the Ethernet hardware.
124 The default value is 0.
125 .It Va hw.alc.msix_disable
126 This tunable disables MSI-X support on the Ethernet hardware.
127 The default value is 0.
130 The following variables are available as both
135 .Bl -tag -width "xxxxxx"
136 .It Va dev.alc.%d.int_rx_mod
137 Maximum amount of time to delay receive interrupt processing in
139 The accepted range is 0 to 130000, the default is 100(100us).
140 Value 0 completely disables the interrupt moderation.
141 .It Va dev.alc.%d.int_tx_mod
142 Maximum amount of time to delay transmit interrupt processing in
144 The accepted range is 0 to 130000, the default is 1000(1ms).
145 Value 0 completely disables the interrupt moderation.
146 .It Va dev.alc.%d.process_limit
147 Maximum amount of Rx frames to be processed in the event loop before
148 rescheduling a taskqueue.
149 The accepted range is 32 to 255, the default value is 64 events.
150 The interface does not need to be brought down and up again before
151 a change takes effect.
164 driver was written by
166 .Aq yongari@FreeBSD.org .