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+.\" $OpenBSD: glxsb.4,v 1.5 2007/05/31 19:19:54 jmc Exp $
+.\"
+.\"Copyright (c) 2006 Tom Cosgrove <tom@openbsd.org>
+.\"
+.\"Permission to use, copy, modify, and distribute this software for any
+.\"purpose with or without fee is hereby granted, provided that the above
+.\"copyright notice and this permission notice appear in all copies.
+.\"
+.\"THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\"WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\"MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\"ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\"WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\"ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\"OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd June 8, 2008
+.Dt GLXSB 4 i386
+.Os
+.Sh NAME
+.Nm glxsb
+.Nd Geode LX Security Block crypto accelerator
+.Sh SYNOPSIS
+To compile this driver into the kernel,
+place the following lines in your
+kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device crypto"
+.Cd "device glxsb"
+.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
+glxsb_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+driver supports the security block of the Geode LX series processors.
+The Geode LX is a member of the AMD Geode family
+of integrated x86 system chips.
+.Pp
+Driven by periodic checks for available data from the generator,
+.Nm
+supplies entropy to the
+.Xr random 4
+driver for common usage.
+.Pp
+.Nm
+also supports acceleration of AES-128-CBC operations for
+.Xr crypto 4 .
+It also registers itself to accelerate other HMAC algorithms, although
+there is no hardware acceleration for those algorithms.
+This is only needed so
+.Nm
+can work with
+.Xr ipsec 4 .
+.Sh CAVEAT
+The
+.Xr crypto 9
+framework will fail to open the crypto session on the device if the AES
+key's length is != 128 bits.
+This prevents the use of the
+.Nm
+device driver with AES keys of length != 128 bits. 
+.Sh SEE ALSO
+.Xr crypto 4 ,
+.Xr intro 4 ,
+.Xr pci 4 ,
+.Xr ipsec 4 ,
+.Xr random 4 ,
+.Xr crypto 9
+.Sh HISTORY
+The
+.Nm
+device driver first appeared in
+.Ox 4.1 .
+The
+.Nm
+device driver was imported into
+.Fx 7.1 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+device driver was written for
+.Ox
+by
+.An Tom Cosgrove .
+It was ported to
+.Fx
+by
+.An Patrick Lamaiziere Aq patfbsd@davenulle.org