mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
79 lines
1.8 KiB
Groff
79 lines
1.8 KiB
Groff
.\" $FreeBSD$
|
|
.\"
|
|
.Dd July 16, 2005
|
|
.Dt EN 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm en
|
|
.Nd "device driver for Midway-based ATM interfaces"
|
|
.Sh SYNOPSIS
|
|
To compile this driver into the kernel,
|
|
place the following lines in your
|
|
kernel configuration file:
|
|
.Bd -ragged -offset indent
|
|
.Cd "device en"
|
|
.Cd "device atm"
|
|
.Cd "device utopia"
|
|
.Ed
|
|
.Pp
|
|
Alternatively, to load the driver as a
|
|
module at boot time, place the following line in
|
|
.Xr loader.conf 5 :
|
|
.Bd -literal -offset indent
|
|
if_en_load="YES"
|
|
.Ed
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
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.
|
|
.Pp
|
|
For configuring the card for IP see
|
|
.Xr natmip 4 .
|
|
.Pp
|
|
The following sysctls are recognized by the driver additionally to those
|
|
handled by
|
|
.Xr utopia 4 :
|
|
.Bl -tag -width indent
|
|
.It Va hw.atm.enX.istats
|
|
Contains an array of
|
|
.Vt uint32_t
|
|
with internal driver statistics.
|
|
.It Va 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.
|
|
.El
|
|
.Pp
|
|
The driver supports the media options
|
|
.Cm sdh ,
|
|
.Cm noscramb
|
|
and
|
|
.Cm unassigned
|
|
(see
|
|
.Xr utopia 4 ) .
|
|
.Sh DIAGNOSTICS
|
|
.Bd -literal
|
|
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
|
|
.Ed
|
|
.Sh CAVEATS
|
|
The driver extensively uses DMA on PCI.
|
|
The first
|
|
generation PCI chipsets do not work or exhibit poor performance.
|
|
.Sh SEE ALSO
|
|
.Xr natm 4 ,
|
|
.Xr natmip 4 ,
|
|
.Xr utopia 4 ,
|
|
.Xr ifconfig 8 ,
|
|
.Xr route 8
|
|
.Sh AUTHORS
|
|
.An Chuck Cranor
|
|
of Washington University implemented
|
|
.Nm
|
|
driver in 1996 for
|
|
.Nx .
|