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EN (4) | Special files and drivers | Unix Manual Pages | :man

NAME

en - "device driver for Midway-based ATM interfaces"

CONTENTS

Synopsis
Description
Diagnostics
Caveats
See Also
Authors

SYNOPSIS

To compile support for the en driver into your kernel, place the following lines in your kernel configuration file:


.Cd "device en"


.Cd "device atm"


.Cd "device utopia"

Alternatively, to load the en driver at boot time, place the following liness 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
.Vt 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


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