1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
.\" Copyright (c) 2008 Stanislav Sedov <stas@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd October 4, 2008
.Dt AE 4
.Os
.Sh NAME
.Nm ae
.Nd "Attansic/Atheros L2 FastEthernet controller driver"
.Sh SYNOPSIS
To compile this driver into the kernel, place the following lines in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device miibus"
.Cd "device ae"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset -indent
if_ae_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
device driver provides support for Attansic/Atheros L2 PCIe FastEthernet
controllers.
.Pp
The controller supports hardware Ethernet checksum processing, hardware
VLAN tag stripping/insertion and an interrupt moderation mechanism.
Attansic L2 also features a 64-bit multicast hash filter.
.Pp
The
.Nm
driver supports the following media types:
.Bl -tag -width ".Cm 10baseT/UTP"
.It Cm autoselect
Enable autoselection of the media type and options.
The user can manually override the autoselected mode by
adding media options to
.Xr rc.conf 5 .
.It Cm 10baseT/UTP
Select 10Mbps operation.
.It Cm 100baseTX
Set 100Mbps (FastEthernet) operation.
.El
.Pp
The
.Nm
driver provides support for the following media options:
.Bl -tag -width ".Cm full-duplex"
.It Cm full-duplex
Force full duplex operation.
.It Cm half-duplex
Force half duplex operation.
.El
.Pp
For more information on configuring this device, see
.Xr ifconfig 8 .
.Sh HARDWARE
The
.Nm
driver supports Attansic/Atheros L2 PCIe FastEthernet controllers, and
is known to support the following hardware:
.Pp
.Bl -bullet -compact
.It
ASUS EeePC 701
.It
ASUS EeePC 900
.El
.Pp
Other hardware may or may not work with this driver.
.Sh LOADER TUNABLES
Tunables can be set at the
.Xr loader 8
prompt before booting the kernel or stored in
.Xr loader.conf 5 .
.Bl -tag -width "xxxxxx"
.It Va hw.ae.msi_disable
This tunable disables MSI support on the Ethernet hardware.
The default value is 0.
.El
.Sh SYSCTL VARIABLES
The
.Nm
driver collects a number of useful MAC counter during the work.
The statistics is available via the
.Va dev.ae.%d.stats
.Xr sysctl 8
tree, where %d corresponds to the controller number.
.Sh DIAGNOSTICS
.Bl -diag
.It "ae%d: watchdog timeout."
The device has stopped responding to the network, or there is a problem with
the network connection (cable).
.It "ae%d: reset timeout."
The card reset operation has been timed out.
.It "ae%d: Generating random ethernet address."
No valid ethernet address was found neither in the controller registers not in
NVRAM.
Random locally administered address with ASUS OUI identifier will be used
instead.
.El
.Sh SEE ALSO
.Xr altq 4 ,
.Xr arp 4 ,
.Xr miibus 4 ,
.Xr netintro 4 ,
.Xr ng_ether 4 ,
.Xr vlan 4 ,
.Xr ifconfig 8
.Sh BUGS
The Attansic L2 FastEthernet contoller supports DMA but do not use a descriptor
based transfer mechanism via scatter-gather DMA.
Thus the data should be copied to/from the controller memory on each
transmit/receive.
Furthermore, a lot of data alignment restrictions apply.
This may introduce a high CPU load on systems with heavy network activity.
Luckily enough this should not be a problem on modern hardware as L2 does
not support speeds faster than 100Mbps.
.Sh HISTORY
The
.Nm
driver and this manual page was written by
.An Stanislav Sedov
.Aq stas@FreeBSD.org .
It first appeared in
.Fx 8.0 .
|
