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NAME

      nge - National Semiconductor PCI Gigabit Ethernet adapter driver

SYNOPSIS

      To compile support for the
      nge driver into your kernel, place the following lines in your kernel
          configuration file:
 
            device miibus
            device nge
 
          Alternatively, to load the
      nge driver at boot time, place the following line in loader.conf(5):
 
                if_nge_load="YES"

DESCRIPTION

      The nge driver provides support for various NICs based on the National
      Semiconductor DP83820 and DP83821 Gigabit Ethernet controller chips.
 
      The DP83820 supports TBI (ten bit interface) and GMII transceivers, which
      means it can be used with either copper or 1000baseX fiber applications.
      The DP83820 supports TCP/IP checksum offload and VLAN tagging/insertion
      as well as a 2048-bit multicast hash filter and up to 4 pattern match
      buffers.
 
      Most cards also use the DP83861 10/100/1000 copper gigabit transceiver
      chip, which supports autonegotiation of 10, 100 and 1000Mbps modes in
      full or half duplex.
 
      The DP83820 also supports jumbo frames, which can be configured via the
      interface MTU setting.  Selecting an MTU larger than 1500 bytes with the
      ifconfig(8) utility configures the adapter to receive and transmit jumbo
      frames.  Using jumbo frames can greatly improve performance for certain
      tasks, such as file transfers and data streaming.
 
      The nge 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 rc.conf(5).
 
      10baseT/UTP  Set 10Mbps operation.  The ifconfig(8) mediaopt option can
                   also be used to select either full-duplex or half-duplex
                   modes.
 
      100baseTX    Set 100Mbps (Fast Ethernet) operation.  The ifconfig(8)
                   mediaopt option can also be used to select either
                   full-duplex or half-duplex modes.
 
      1000baseTX   Set 1000baseTX operation over twisted pair.  full-duplex and
                   half-duplex modes are supported.
 
      1000baseSX   Set 1000Mbps (Gigabit Ethernet) operation.  Both full-duplex
                   and half-duplex modes are supported.
 
      The nge driver supports the following media options:
 
      full-duplex  Force full duplex operation.
 
      half-duplex  Force half duplex operation.
 
      The nge driver also supports one special link option for 1000baseTX
      cards:
 
      link0  With 1000baseTX cards, establishing a link between two ports
             requires that one port be configured as a master and the other a
             slave.  With autonegotiation, the master/slave settings will be
             chosen automatically.  However when manually selecting the link
             state, it is necessary to force one side of the link to be a mas‐
             ter and the other a slave.  The nge driver configures the ports as
             slaves by default.  Setting the link0 flag with ifconfig(8) will
             set a port as a master instead.
 
      For more information on configuring this device, see ifconfig(8).

HARDWARE

      The nge driver supports National Semiconductor DP83820 and DP83821 based
      Gigabit Ethernet adapters including:
 
            Addtron AEG320T
            Ark PC SOHO-GA2500T (32-bit PCI) and SOHO-GA2000T (64-bit PCI)
            Asante FriendlyNet GigaNIX 1000TA and 1000TPC
            D-Link DGE-500T
            LinkSys EG1032 (32-bit PCI) and EG1064 (64-bit PCI)
            Netgear GA621
            Netgear GA622T
            SMC EZ Card 1000 (SMC9462TX)
            Surecom Technology EP-320G-TX
            Trendware TEG-PCITX (32-bit PCI) and TEG-PCITX2 (64-bit PCI)

DIAGNOSTICS

      nge%d: couldn     t map memory  A fatal initialization error has occurred.
 
      nge%d: couldn     t map ports  A fatal initialization error has occurred.
 
      nge%d: couldn     t map interrupt  A fatal initialization error has occurred.
 
      nge%d: no memory for softc struct!  The driver failed to allocate memory
      for per-device instance information during initialization.
 
      nge%d: failed to enable memory mapping!  The driver failed to initialize
      PCI shared memory mapping.  This might happen if the card is not in a
      bus-master slot.
 
      nge%d: no memory for jumbo buffers!  The driver failed to allocate memory
      for jumbo frames during initialization.
 
      nge%d: watchdog timeout  The device has stopped responding to the net‐
      work, or there is a problem with the network connection (cable).
      arp(4), miibus(4), netintro(4), ng_ether(4), polling(4), vlan(4),
      ifconfig(8)
 
      National Semiconductor DP83820 datasheet, http://www.national.com.
 
      National Semiconductor DP83861 datasheet, http://www.national.com.

HISTORY

      The nge device driver first appeared in FreeBSD 4.4.

AUTHORS

      The nge driver was written by Bill Paul 〈wpaul@bsdi.com〉.