1 .\" Copyright (c) 1997, 1998
2 .\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
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38 .Nd "VIA Technologies Rhine I/II/III ethernet device driver"
45 driver provides support for PCI ethernet adapters and embedded
46 controllers based on the VIA Technologies VT3043 Rhine I,
47 VT86C100A Rhine II, and VT6105/VT6105M Rhine III fast ethernet
50 the D-Link DFE530-TX, the Hawking Technologies PN102TX, the
51 AOpen/Acer ALN-320, and various other commodity fast ethernet
54 The VIA Rhine chips use bus master DMA and have a descriptor layout
55 designed to resemble that of the DEC 21x4x "tulip" chips.
57 layout is different however and the receive filter in the Rhine chips
58 is much simpler and is programmed through registers rather than by
59 downloading a special setup frame through the transmit DMA engine.
60 Transmit and receive DMA buffers must be longword
62 The Rhine chips are meant to be interfaced with external
63 physical layer devices via an MII bus.
65 10 and 100Mbps speeds in either full or half duplex.
69 driver supports the following media types:
71 .Bl -tag -width xxxxxxxxxxxxxxxxxxxx
73 Enable autoselection of the media type and options.
74 The user can manually override
75 the autoselected mode by adding media options to the
82 option can also be used to select either
88 Set 100Mbps (fast ethernet) operation.
91 option can also be used to select either
100 driver supports the following media options:
102 .Bl -tag -width xxxxxxxxxxxxxxxxxxxx
104 Force full duplex operation
106 Force half duplex operation.
109 Note that the 100baseTX media type is only available if supported
111 For more information on configuring this device, see
115 .It "vr%d: couldn't map memory"
116 A fatal initialization error has occurred.
117 .It "vr%d: couldn't map interrupt"
118 A fatal initialization error has occurred.
119 .It "vr%d: watchdog timeout"
120 The device has stopped responding to the network, or there is a problem with
121 the network connection (cable).
122 .It "vr%d: no memory for rx list"
123 The driver failed to allocate an mbuf for the receiver ring.
124 .It "vr%d: no memory for tx list"
125 The driver failed to allocate an mbuf for the transmitter ring when
126 allocating a pad buffer or collapsing an mbuf chain into a cluster.
127 .It "vr%d: chip is in D3 power state -- setting to D0"
128 This message applies only to adapters which support power
130 Some operating systems place the controller in low power
131 mode when shutting down, and some PCI BIOSes fail to bring the chip
132 out of this state before configuring it.
133 The controller loses all of
134 its PCI configuration in the D3 state, so if the BIOS does not set
135 it back to full power mode in time, it won't be able to configure it
137 The driver tries to detect this condition and bring
138 the adapter back to the D0 (full power) state, but this may not be
139 enough to return the driver to a fully operational condition.
141 you see this message at boot time and the driver fails to attach
142 the device as a network interface, you will have to perform second
143 warm boot to have the device properly configured.
145 Note that this condition only occurs when warm booting from another
147 If you power down your system prior to booting
149 the card should be configured correctly.
158 .%T The VIA Technologies VT86C100A data sheet
159 .%O http://www.via.com.tw
164 device driver first appeared in
169 driver was written by
170 .An Bill Paul Aq wpaul@ctr.columbia.edu .
174 driver always copies transmit mbuf chains into longword-aligned
175 buffers prior to transmission in order to pacify the Rhine chips.
176 If buffers are not aligned correctly, the chip will round the
177 supplied buffer address and begin DMAing from the wrong location.
178 This buffer copying impairs transmit performance on slower systems but can't
180 On faster machines (e.g. a Pentium II), the performance
181 impact is much less noticeable.