Enable autoselection of the media type and options. Note that this option is only available with the 3c905 and 3c905B adapters with external PHYs or built-in autonegotiation logic. For 3c900 adapters, the driver will choose the mode specified in the EEPROM. The user can change this 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.
Enable AUI transceiver (available only on COMBO cards).
Enable BNC coax transceiver (available only on COMBO cards).
The xl 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).
The device has stopped responding to the network, or there is a problem with the network connection (cable).
"xl%d: no memory for rx list"
The driver failed to allocate an mbuf for the receiver ring.
"xl%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.
"xl%d: command never completed!"
Some commands issued to the 3c90x ASIC take time to complete: the driver is supposed to wait until the command in progress bit in the status register clears before continuing. In rare instances, this bit may not clear. To avoid getting caught in an infinite wait loop, the driver only polls the bit for a finite number of times before giving up, at which point it issues this message. This message may be printed during driver initialization on slower machines. If you see this message but the driver continues to function normally, the message can probably be ignored.
"xl%d: chip is in D3 power state -- setting to D0"
This message applies only to 3c905B adapters, which support power management. Some operating systems place the 3c905B in low power mode when shutting down, and some PCI BIOSes fail to bring the chip out of this state before configuring it. The 3c905B 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 .Fx , the card should be configured correctly.
"xl%d: WARNING: no media options bits set in the media options register!"
This warning may appear when using the driver on some Dell Latitude docking stations with built-in 3c905-TX adapters. For whatever the reason, the MII available bit in the media options register on this particular equipment is not set, even though it should be (the 3c905-TX always uses an external PHY transceiver). The driver will attempt to guess the proper media type based on the PCI device ID word. The driver makes a lot of noise about this condition because the author considers it a manufacturing defect.