• Ben Nizette's avatar
    UIO: Implement a UIO interface for the SMX Cryptengine · b54f2863
    Ben Nizette authored
    This patch implements a UIO interface for the SMX Cryptengine.
    The Cryptengine found on the Nias Digital SMX board is best suited
    for a UIO interface.  It is not wired in to the cryptographic API
    as the engine handles it's own keys, algorithms, everything.  All
    that we know about is that if there's room in the buffer, you can
    write data to it and when there's data ready, you read it out again.
    There isn't necessarily even any direct correlation between data
    going in and data coming out again, the engine may consume or
    generate data all on its own.
    This driver is for proprietary hardware but we're always told to
    submit the drivers anyway; here you are.  :-)
    This is version 4 of this patch and addresses all issues raised by
    Hans-Jürgen Koch and Paul Mundt in their reviews.  Slightly altered
    is Paul's suggestion to use DRV_NAME and DRV_VERSION as the UIO
    version and name.  While at the moment they are the same, there
    is no reason for them to stay that way.  Nevertheless we now at
    least provide a MODULE_VERSION macro to keep modinfo happy.
    Signed-off-by: default avatarBen Nizette <bn@niasdigital.com>
    Acked-by: default avatarPaul Mundt <lethal@linux-sh.org>
    Signed-off-by: default avatarHans J Koch <hjk@linutronix.de>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>