| Main index | Section 4 | Options |
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_vr_load="YES"
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 vr driver supports the following media types:
| autoselect | 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. |
| 10baseT/UTP | Set 10Mbps operation. The mediaopt option can also be used to select either full-duplex or half-duplex modes. |
| 100baseTX | Set 100Mbps (Fast Ethernet) operation. The mediaopt option can also be used to select either full-duplex or half-duplex modes. |
The vr driver supports the following media options:
| full-duplex | Force full duplex operation. |
| half-duplex | 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).
| dev.vr.%d.stats | |
| 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
management.
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
correctly.
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.
If
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 FreeBSD , the card should be configured correctly. |
The VIA Technologies VT86C100A data sheet,
| VR (4) | February 25, 2012 |
| Main index | Section 4 | Options |
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| “ | The most important thing in the programming language is the name. A language will not succeed without a good name. I have recently invented a very good name and now I am looking for a suitable language. | ” |
| — Donald Knuth | ||