Provided by: pcmcia-cs_3.2.8-5.2ubuntu5_i386 bug

NAME

       3c575_cb - 3Com 3c575 Etherlink XL 10/100 CardBus device driver

SYNOPSIS

       insmod  3c575_cb.o  [debug=n]  [rx_copybreak=n]  [max_interrupt_work=n]
       [use_hw_csums=n] [down_poll_rate=n] [auto_polarity=n]

DESCRIPTION

       3c575_cb is the low-level Card  Services  driver  for  the  3Com  3c575
       EtherLink  XL  CardBus  series  ethernet adapters.  When this driver is
       attached to a card, it allocates the  next  available  ethernet  device
       (eth0..eth#).   This  information for this card will be reported in the
       kernel log file, and the device name passed on to cardmgr(8).

       The driver uses the N-Way autonegotiating transceiver to negotiate  the
       speed  and  duplex  of  the network link.  If the link partner does not
       support negotiation, only the link speed is detected.   To  monitor  or
       override the autonegotiation process, see mii-tool(8).

       If  the  on-card EEPROM is programmed for a full-duplex (FD) link, only
       FD media types are advertised and the  link  is  assumed  to  be  full-
       duplex.

PARAMETERS

       rx_copybreak=n
              Set  the  breakpoint  for  copying incoming frames into reduced-
              sized packet  buffers.   The  default  value  of  200  bytes  is
              reasonable for most systems.

       max_interrupt_work=n
              This  option  selects  the maximum amount of work handled during
              each interrupt.  Each received packet  counts  as  one  unit  of
              work,  as does updating statistics counters and handling errors.
              The default value of 32 should only need to be increased on very
              slow  machines.   An  occasional  "too  much  work in interrupt"
              message is not a problem.

       use_hw_csums=n
              Controls  use  of  an   adapter’s   on-board   TCP/IP   checksum
              verification  for  incoming  packets.   This  is  on by default;
              setting to 0 disables hardware checksums.  It may be  useful  to
              disable  hardware checksums if it is suspected that something is
              corrupting data on its way from the card to the CPU.

       down_poll_rate=n
              For Cyclone and Tornado chipsets, this is the rate at which  the
              card  polls  the transmit ring for new packets.  The value is in
              units of 320 ns; a value of 0 disables polling.  The default  is
              20  (6.4  us), and the maximum allowed value is 127.  Polling is
              more efficient but can consume a significant amount of  PCI  bus
              bandwidth.

       auto_polarity=n
              This flag can be used to control the transceiver’s auto polarity
              detection capability.  Some Cisco Catalyst switches are known to
              interact  badly  with this feature in 10baseT mode.  It defaults
              to 1 (enabled).

AUTHOR

       This driver: Donald Becker - becker@scyld.com

       Linux    PC    Card     control     software:     David     Hinds     -
       dahinds@users.sourceforge.net et al.

SEE ALSO

       cardmgr(8), pcmcia(5), mii-tool(8).