Copyright (c) 1997, 1998 Bill Paul <email@example.com>. 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 disclaime...
NAMEvr - VIA Technologies Rhine I/II/III Ethernet device driver
SYNOPSISTo compile this driver into the kernel, place the following lines in your kernel configuration file:
device miibus device vr
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:
DESCRIPTIONThe sysctl Cm net.inet.tcp.syncookies driver provides support for PCI Ethernet adapters and embedded controllers based on the VIA Technologies VT3043 Rhine I, VT86C100A Rhine II, and VT6105/VT6105M Rhine III Fast Ethernet controller chips.
The VIA Rhine chips use bus master DMA and have a descriptor layout designed to resemble that of the DEC 21x4x ``tulip'' chips. The register layout is different however and the receive filter in the Rhine chips is much simpler and is programmed through registers rather than by downloading a special setup frame through the transmit DMA engine. Transmit and receive DMA buffers must be longword aligned. The Rhine chips are meant to be interfaced with external physical layer devices via an MII bus. They support both 10 and 100Mbps speeds in either full or half duplex.
The sysctl Cm net.inet.tcp.syncookies driver supports the following media types:
- Enable autoselection of the media type and options. The user can manually override the autoselected mode by adding media options to the /etc/rc.conf file.
- Set 10Mbps operation. The mediaopt option can also be used to select either full-duplex or half-duplex modes.
- Set 100Mbps (Fast Ethernet) operation. The mediaopt option can also be used to select either full-duplex or half-duplex modes.
The sysctl Cm net.inet.tcp.syncookies driver supports the following media options:
- Force full duplex operation.
- Force half duplex operation.
Note that the 100baseTX media type is only available if supported by the adapter. For more information on configuring this device, see ifconfig(8).
HARDWAREThe sysctl Cm net.inet.tcp.syncookies driver supports VIA Technologies Rhine I, Rhine II, and Rhine III based Fast Ethernet adapters including:
- AOpen/Acer ALN-320
- D-Link DFE520-TX
- D-Link DFE530-TX
- Hawking Technologies PN102TX
- Soekris Engineering net5501
SYSCTL VARIABLESThe following variables are available as sysctl(8) variables:
- Display lots of useful MAC counters maintained in the driver.
- "vr%d: couldn't map memory"
- A fatal initialization error has occurred.
- "vr%d: couldn't map interrupt"
- A fatal initialization error has occurred.
- "vr%d: watchdog timeout"
- The device has stopped responding to the network, or there is a problem with the network connection (cable).
- "vr%d: no memory for rx list"
- The driver failed to allocate an mbuf for the receiver ring.
- "vr%d: no memory for tx list"
- The driver failed to allocate an mbuf for the transmitter ring when allocating a pad buffer or collapsing an mbuf chain into a cluster.
- "vr%d: chip is in D3 power state -- setting to D0"
This message applies only to adapters which support power
Some operating systems place the controller in low power
mode when shutting down, and some PCI BIOSes fail to bring the chip
out of this state before configuring it.
The controller loses all of
its PCI configuration in the D3 state, so if the BIOS does not set
it back to full power mode in time, it will not be able to configure it
The driver tries to detect this condition and bring
the adapter back to the D0 (full power) state, but this may not be
enough to return the driver to a fully operational condition.
you see this message at boot time and the driver fails to attach
the device as a network interface, you will have to perform second
warm boot to have the device properly configured.
Note that this condition only occurs when warm booting from another operating system. If you power down your system prior to booting Fx , the card should be configured correctly.
SEE ALSOaltq(4), arp(4), miibus(4), netintro(4), ng_ether4, polling(4), ifconfig(8)
- The VIA Technologies VT86C100A data sheet