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en - device driver for Midway-based ATM interfaces

 

NAME

      en - device driver for Midway-based ATM interfaces
 

SYNOPSIS

      To compile this driver into the kernel, place the following lines in your
      kernel configuration file:
 
            device en
            device atm
            device utopia
 
      Alternatively, to load the driver as a module at boot time, place the
      following line in loader.conf(5):
 
            if_en_load="YES"
 

DESCRIPTION

      The en device driver supports Midway-based ATM interfaces including the
      Efficient Networks, Inc. ENI-155 and Adaptec ANA-59x0.  Midway is an AAL5
      SAR (Segmentation and Reassembly) chip.
 
      For configuring the card for IP see natmip(4).
 
      The following sysctls are recognized by the driver additionally to those
      handled by utopia(4):
 
      hw.atm.enX.istats
              Contains an array of uint32_t with internal driver statistics.
 
      hw.atm.enX.debug
              This is a bit map of debugging options.  This variable is only
              available when the driver is compiled with debugging support.
 
      The driver supports the media options sdh, noscramb and unassigned (see
      utopia(4)).
 

DIAGNOSTICS

      en0 <Efficient Networks ENI-155p> rev 0 int a irq 5 on pci0:16
      en0: ATM midway v0, board IDs 6.0, Utopia (pipelined), 512KB on-board RAM
      en0: maximum DMA burst length = 64 bytes
      en0: 7 32KB receive buffers, 8 32KB transmit buffers allocated
 

CAVEATS

      The driver extensively uses DMA on PCI.  The first generation PCI
      chipsets do not work or exhibit poor performance.
      natm(4), natmip(4), utopia(4), ifconfig(8), route(8)
 

AUTHORS

      Chuck Cranor of Washington University implemented en driver in 1996 for
      NetBSD.
 

Sections

Based on BSD UNIX
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