NAME

       glxsb — Geode LX Security Block crypto accelerator

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device crypto
             device glxsb

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             glxsb_load="YES"

DESCRIPTION

       The glxsb 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.

       Driven  by periodic checks for available data from the generator, glxsb supplies entropy to the random(4)
       driver for common usage.

       glxsb also supports acceleration of AES-128-CBC operations for 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 glxsb can work with ipsec(4).

CAVEAT

       The 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 glxsb device driver with AES keys of length != 128 bits.

SEE ALSO

       crypto(4), intro(4), ipsec(4), pci(4), random(4), crypto(9)

HISTORY

       The  glxsb  device  driver  first  appeared  in  OpenBSD  4.1.  The glxsb device driver was imported into
       FreeBSD 7.1.

AUTHORS

       The glxsb device driver was written for OpenBSD by Tom Cosgrove.  It was ported  to  FreeBSD  by  Patrick
       Lamaiziere <patfbsd@davenulle.org>.

Debian                                            June 8, 2008                                          GLXSB(4)