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    The following form allows you to view linux man pages.

    Command:

    xl

    
         kernel configuration file:
    
               device miibus
               device xl
    
         Alternatively, to load the driver as a module at boot time, place the
         following line in loader.conf(5):
    
               if_xl_load="YES"
    
    
    

    DESCRIPTION

         The xl driver provides support for PCI Ethernet adapters and embedded
         controllers based on the 3Com "boomerang," "cyclone," "hurricane" and
         "tornado" bus-master Etherlink XL chips.
    
         The Etherlink XL chips support built-in 10baseT, 10base2 and 10base5
         transceivers as well as an MII bus for externally attached PHY
         transceivers.  The 3c905 series typically uses a National Semiconductor
         NS 83840A 10/100 PHY for 10/100 Mbps support in full or half-duplex.  The
         3c905B adapters have built-in autonegotiation logic mapped onto the MII
         for compatibility with previous drivers.  Fast Etherlink XL adapters such
         as the 3c905-TX and 3c905B-TX are capable of 10 or 100Mbps data rates in
         either full or half duplex and can be manually configured for any sup-
         ported mode or automatically negotiate the highest possible mode with a
         link partner.
    
         The xl driver supports the following media types:
    
         autoselect            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.
    
         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.
    
         10base5/AUI           Enable AUI transceiver (available only on COMBO
                               cards).
    
         10base2/BNC           Enable BNC coax transceiver (available only on
                               COMBO cards).
    
         The xl driver supports the following media options:
    
         ?   3Com 3c905-T4
         ?   3Com 3c900B-TPO
         ?   3Com 3c900B-TPC
         ?   3Com 3c900B-FL
         ?   3Com 3c900B-COMBO
         ?   3Com 3c905B-T4
         ?   3Com 3c905B-TX
         ?   3Com 3c905B-FX
         ?   3Com 3c905B-COMBO
         ?   3Com 3c905C-TX
         ?   3Com 3c980, 3c980B, and 3c980C server adapters
         ?   3Com 3cSOHO100-TX OfficeConnect adapters
         ?   3Com 3c450 HomeConnect adapters
         ?   3Com 3c555, 3c556 and 3c556B mini-PCI adapters
         ?   3Com 3C3SH573BT, 3C575TX, 3CCFE575BT, 3CXFE575BT, 3CCFE575CT,
             3CXFE575CT, 3CCFEM656, 3CCFEM656B, and 3CCFEM656C, 3CXFEM656,
             3CXFEM656B, and 3CXFEM656C CardBus adapters
         ?   3Com 3c905-TX, 3c905B-TX 3c905C-TX, 3c920B-EMB, and 3c920B-EMB-WNM
             embedded adapters
    
         Both the 3C656 family of CardBus cards and the 3C556 family of MiniPCI
         cards have a built-in proprietary modem.  Neither the xl driver nor any
         other FreeBSD driver supports this modem.
    
    
    

    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 for a finite number of
         times before giving up, at which point it issues this message.  This mes-
         sage 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
         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 dock-
         ing 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 manu-
         facturing defect.
    
         xl%d: transmission error: %d
         xl%d: tx underrun, increasing tx start threshold to %d bytes  This mes-
         sage may appear while the adapter tunes its transmission buffers under
         various load amounts and are mostly harmless.  It is probably safe to
         ignore them.
    
    
    

    SEE ALSO

         altq(4), arp(4), cardbus(4), miibus(4), netintro(4), ng_ether(4),
         pccard(4), polling(4), ifconfig(8)
    
    
    

    HISTORY

         The xl device driver first appeared in FreeBSD 3.0.
    
    
    

    AUTHORS

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

    BSD January 23, 2008 BSD

    
    
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