MirOS Manual: xl(4)

XL(4)                      BSD Programmer's Manual                       XL(4)

NAME

     xl - 3Com EtherLink XL and Fast EtherLink XL Ethernet driver

SYNOPSIS

     xl* at pci? dev ? function ?
     xl* at cardbus? dev ? function ?
     amphy* at mii? phy ?
     exphy* at mii? phy ?
     nsphy* at mii? phy ?

DESCRIPTION

     The xl device driver supports the 3Com EtherLink XL and Fast EtherLink XL
     family of Ethernet cards, and embedded controllers based on the 3Com
     "boomerang" and "cyclone" bus master EtherLink XL chips. This includes,
     among others, the following models:

           3C555   EtherLink XL MiniPCI
           3C556   EtherLink XL MiniPCI
           3C556B  EtherLink XL MiniPCI
           3C575   10/100 LAN CardBus PC Card
           3C656   10/100 LAN+Modem CardBus PC Card
           3C900   EtherLink XL PCI
           3C900B  EtherLink XL PCI
           3C905   Fast EtherLink XL PCI
           3C905B  Fast EtherLink XL PCI
           3C905C  Fast EtherLink XL PCI
           3C980   Fast EtherLink Server NIC
           3CSOHO  OfficeConnect Fast Ethernet NIC
           9201    NVIDIA nForce2 integrated 3Com 9201 (nForce2-ST, nForce2-
                   GT)

     It also supports embedded 3C905-TX and 3C905B-TX Ethernet hardware found
     in certain Dell OptiPlex and Dell Precision desktop machines, as well as
     some Dell Latitude laptop docking stations. Other models of 3Com network
     cards are supported by the ec(4), eg(4), el(4), ep(4), and ie(4) drivers.

     Category 3, 4 or 5 unshielded twisted-pair (UTP) cable should be used for
     RJ-45 (10baseT), thick Ethernet coaxial (RG59 B/U, 50 ohm) for AUI/DIX,
     and thin Ethernet coaxial (RG58 A/U or C/U, 50 ohm +/- 4) for BNC
     (10base2). Some 3Com NICs also support MII connectors (switchable
     10/100Mbps UTP). The 3C905B-FX and other similar cards are capable of
     100Mbps over fiber.

     The 3C985 series of Gigabit cards are supported by the ti(4) driver.

     Hardware TCP/IP checksum offloading for IPv4 is supported on the 3C905B.

     The following media types and options (as given to ifconfig(8)) are sup-
     ported:

           media autoselect
                Enable autoselection of media type and options. Note that this
                media type is only available with adapters that have external
                PHYs or built-in autonegotiation logic. For 3C900 and 3C900B
                adapters, the driver will choose the mode specified in the
                EEPROM. This can be changed by adding media options to the ap-
                propriate hostname.if(5) file.

           media 100baseFX mediaopt full-duplex
                For those cards that support it, force full-duplex 100Mbps
                operation over fiber.

           media 100baseFX mediaopt half-duplex
                For those cards that support it, force half-duplex 100Mbps
                operation over fiber.

           media 100baseTX mediaopt full-duplex
                Set 100Mbps (Fast Ethernet) operation and force full-duplex
                mode.

           media 100baseTX mediaopt half-duplex
                Set 100Mbps (Fast Ethernet) operation and force half-duplex
                mode.

           media 10baseT mediaopt full-duplex
                Set 10baseT (UTP) operation and force full-duplex mode.

           media 10baseT mediaopt half-duplex
                Set 10baseT (UTP) operation and force half-duplex mode.

           media 10base5
                Set 10base5 (thick-net) operation (half-duplex only).

           media 10base2
                Set 10base2 (thin-net) operation (half-duplex only).

     For more information on configuring this device, see ifconfig(8). To view
     a list of media types and options supported by this card try ifconfig -m
     <device>. For example, ifconfig -m xl0.

DIAGNOSTICS

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

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

     xl%d: device timeout  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 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 this message
     appears 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 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 this
     message appears at boot time and the driver fails to attach the device as
     a network interface, a second warm boot will have to be performed to have
     the device properly configured.

     Note that this condition only occurs when warm booting from another
     operating system. If the system is powered down prior to booting OpenBSD,
     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 La-
     titude 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.

SEE ALSO

     amphy(4), arp(4), cardbus(4), ec(4), eg(4), el(4), ep(4), exphy(4),
     ie(4), ifmedia(4), intro(4), netintro(4), nsphy(4), ti(4),
     hostname.if(5), ifconfig(8)

HISTORY

     The xl device driver first appeared in FreeBSD 3.0. OpenBSD support was
     added in OpenBSD 2.4.

AUTHORS

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

MirOS BSD #10-current          August 16, 1998                               2

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