1 .\" $OpenBSD: nfe.4,v 1.10 2006/08/30 22:56:05 jmc Exp $
2 .\" $DragonFly: src/share/man/man4/nfe.4,v 1.10 2008/07/26 07:41:45 sephe Exp $
4 .\" Copyright (c) 2006 Jonathan Gray <jsg@openbsd.org>
6 .\" Permission to use, copy, modify, and distribute this software for any
7 .\" purpose with or without fee is hereby granted, provided that the above
8 .\" copyright notice and this permission notice appear in all copies.
10 .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 .Nd NVIDIA nForce MCP 10/100/Gigabit Ethernet driver
25 To compile this driver into the kernel,
26 place the following lines in your
27 kernel configuration file:
28 .Bd -ragged -offset indent
33 Alternatively, to load the driver as a
34 module at boot time, place the following line in
36 .Bd -literal -offset indent
42 driver supports PCI Ethernet adapters based on the NVIDIA
43 nForce Media and Communications Processors (MCP), such as
44 the nForce, nForce 2, nForce 3, CK804, MCP04, MCP51, MCP55,
45 MCP61, MCP65, MCP67, MCP73, MCP77 and MCP79 Ethernet controller chips.
49 driver supports the following
53 .Bl -tag -width autoselect -compact
55 Enable autoselection of the media type and options.
59 Set 100Mbps (Fast Ethernet) operation.
61 Set 1000Mbps (Gigabit Ethernet) operation (recent models only).
63 .Ss MIB Variables and Loader Tunables
64 The following per-interface variables are implemented in the
69 Loader tunables with the same names, but using the prefix
71 are also implemented, they apply to all
73 interfaces in system and can be set in
75 .Bl -tag -width ".Va rx_ring_count"
77 Interrupt moderation time (unit: microseconds).
78 The default value is -125.
79 A value of 0 means disabled.
80 A negative value, -Y, means hardware timer simulated interrupt moderation,
81 the simulated interrupt moderation timer will be set to Y.
82 A positive valye, Y, means hardware timer only interrupt moderation,
83 hardware timer will be set to Y.
84 Value can be tuned when the interface is running.
85 Positive values in the range 64-128 seems to be a reasonable.
88 sysctl node is read-only.
89 The default value is 128.
90 With heavier interrupt moderation (eg. imtimer=-250),
91 it is recommended to increase rx_ring_count (eg. to 512).
94 sysctl node is read-only.
95 The default value is 256.
98 For more information on configuring this device, see
118 device driver first appeared in
120 and was imported into
126 driver was written by
131 .Aq damien@openbsd.org .
136 .Aq sepherosa@gmail.com .
138 NVIDIA refuse to release any documentation on their products.