AX(4)                 OpenBSD Programmer's Manual (i386)                 AX(4)

NAME
     ax - ASIX Electronics AX88140A and AX88141 Fast Ethernet device driver

SYNOPSIS
     ax* at pci? dev ? function ?

DESCRIPTION
     The ax driver provides support for PCI Ethernet adapters and embedded
     controllers based on the ASIX AX88140A and AX88141 Fast Ethernet con-
     troller chips, including the Alfa Inc. GFC2204 and the CNet Pro110.  The
     AX88141 is a new version of the AX88140A with power management and magic
     packet support.

     The ASIX chip uses bus master DMA and is designed to be a DEC 21x4x
     workalike. The only major difference between the DEC and ASIX parts is
     that the ASIX receiver filter is programmed using two special registers
     where as the DEC chip is programmed by uploading a special setup frame
     via the transmit DMA engine.  The ASIX receive filter can only be pro-
     grammed with a single perfect filter entry for the local station address
     and a 64-bit multicast hash table; the DEC filter supports several other
     options. The ASIX Fast Ethernet controller supports both 10 and 100Mbps
     speeds in either full or half duplex using an external MII transceiver.

     The ax 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 ax driver supports the following media options:

     full-duplex           Force full duplex operation

     half-duplex           Force half duplex operation.

     For more information on configuring this device, see ifconfig(8).

DIAGNOSTICS
     ax%d: couldn't map memory  A fatal initialization error has occurred.

     ax%d: couldn't map interrupt  A fatal initialization error has occurred.

     ax%d: watchdog timeout  The device has stopped responding to the network,
     or there is a problem with the network connection (cable).

     ax%d: no memory for rx list  The driver failed to allocate an mbuf for
     the receiver ring.

     ax%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.

     ax%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 won't 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 oper-
     ating system. If you power down your system prior to booting FreeBSD, the
     card should be configured correctly.

SEE ALSO
     arp(4),  netintro(4),  ifconfig(8)

     ASIX AX81140A data sheet, http://www.asix.com.tw.

HISTORY
     The ax device driver first appeared in OpenBSD 2.6.

AUTHOR
     The ax driver was written by Bill Paul <wpaul@ctr.columbia.edu>.


OpenBSD 2.6                     August 14, 1999                              2
