EN(4) BSD Kernel Interfaces Manual EN(4)NAME
en -- Midway-based ATM interfaces device driver
SYNOPSIS
en* at pci? dev ? function ?
en* at sbus? slot ? offset ?
DESCRIPTION
The en device driver supports Midway-based ATM interfaces including the Efficient Networks, Inc. ENI-155 and Adaptec 5900 and 5905.
OPTIONS
The Efficient Networks, Inc. and Adaptec interfaces use significantly different DMA engines. In order to reduce the size of the en driver
object, exactly one of the following options may be placed in the kernel configuration file:
MIDWAY_ADPONLY Include support for Adaptec interfaces only.
MIDWAY_ENIONLY Include support for Efficient Networks, Inc. interfaces only.
HARDWARE
Cards supported by the en driver include:
Efficient Networks, Inc. ENI-155
Adaptec 5900 and 5905
SEE ALSO intro(4), pci(4), sbus(4), ifconfig(8)BUGS
The Sbus attachment of the en driver only currently functions on sun4c class systems.
BSD November 10, 1997 BSD
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EN(4) BSD Kernel Interfaces Manual EN(4)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.
SEE ALSO natm(4), natmip(4), utopia(4), ifconfig(8), route(8)AUTHORS
Chuck Cranor of Washington University implemented en driver in 1996 for NetBSD.
BSD July 16, 2005 BSD
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