From owner-svn-src-user@FreeBSD.ORG Wed Jun 9 05:06:43 2010 Return-Path: Delivered-To: svn-src-user@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3F6931065678; Wed, 9 Jun 2010 05:06:43 +0000 (UTC) (envelope-from jmallett@FreeBSD.org) Received: from svn.freebsd.org (unknown [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 2DB6A8FC1D; Wed, 9 Jun 2010 05:06:43 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id o5956hq3019982; Wed, 9 Jun 2010 05:06:43 GMT (envelope-from jmallett@svn.freebsd.org) Received: (from jmallett@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id o5956h2h019979; Wed, 9 Jun 2010 05:06:43 GMT (envelope-from jmallett@svn.freebsd.org) Message-Id: <201006090506.o5956h2h019979@svn.freebsd.org> From: Juli Mallett Date: Wed, 9 Jun 2010 05:06:43 +0000 (UTC) To: src-committers@freebsd.org, svn-src-user@freebsd.org X-SVN-Group: user MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r208933 - user/jmallett/octeon/sys/mips/cavium X-BeenThere: svn-src-user@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the experimental " user" src tree" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jun 2010 05:06:43 -0000 Author: jmallett Date: Wed Jun 9 05:06:42 2010 New Revision: 208933 URL: http://svn.freebsd.org/changeset/base/208933 Log: Add a trivial driver for the Octeon RNG. Added: user/jmallett/octeon/sys/mips/cavium/octeon_rnd.c Modified: user/jmallett/octeon/sys/mips/cavium/files.octeon1 Modified: user/jmallett/octeon/sys/mips/cavium/files.octeon1 ============================================================================== --- user/jmallett/octeon/sys/mips/cavium/files.octeon1 Wed Jun 9 02:07:51 2010 (r208932) +++ user/jmallett/octeon/sys/mips/cavium/files.octeon1 Wed Jun 9 05:06:42 2010 (r208933) @@ -15,6 +15,8 @@ mips/cavium/uart_dev_oct16550.c option mips/mips/intr_machdep.c standard mips/mips/tick.c standard +mips/cavium/octeon_rnd.c optional random + mips/cavium/octe/ethernet.c optional octe mips/cavium/octe/ethernet-common.c optional octe mips/cavium/octe/ethernet-mdio.c optional octe Added: user/jmallett/octeon/sys/mips/cavium/octeon_rnd.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/jmallett/octeon/sys/mips/cavium/octeon_rnd.c Wed Jun 9 05:06:42 2010 (r208933) @@ -0,0 +1,137 @@ +/*- + * Copyright (c) 2010 Juli Mallett + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +/* + * XXX + * random_harvest(9) says to call it with no more than 16 bytes, but at least + * safe(4) seems to violate that rule. + */ +#define OCTEON_RND_WORDS 2 + +struct octeon_rnd_softc { + uint64_t sc_entropy[OCTEON_RND_WORDS]; + struct callout sc_callout; +}; + +static void octeon_rnd_identify(driver_t *drv, device_t parent); +static int octeon_rnd_attach(device_t dev); +static int octeon_rnd_probe(device_t dev); +static int octeon_rnd_detach(device_t dev); + +static void octeon_rnd_harvest(void *); + +static device_method_t octeon_rnd_methods[] = { + /* Device interface */ + DEVMETHOD(device_identify, octeon_rnd_identify), + DEVMETHOD(device_probe, octeon_rnd_probe), + DEVMETHOD(device_attach, octeon_rnd_attach), + DEVMETHOD(device_detach, octeon_rnd_detach), + + { 0, 0 } +}; + +static driver_t octeon_rnd_driver = { + "rnd", + octeon_rnd_methods, + sizeof (struct octeon_rnd_softc) +}; +static devclass_t octeon_rnd_devclass; +DRIVER_MODULE(rnd, nexus, octeon_rnd_driver, octeon_rnd_devclass, 0, 0); + +static void +octeon_rnd_identify(driver_t *drv, device_t parent) +{ + BUS_ADD_CHILD(parent, 0, "rnd", 0); +} + +static int +octeon_rnd_probe(device_t dev) +{ + if (device_get_unit(dev) != 0) + return (ENXIO); + + device_set_desc(dev, "Cavium Octeon Random Number Generator"); + return (0); +} + +static int +octeon_rnd_attach(device_t dev) +{ + struct octeon_rnd_softc *sc; + + sc = device_get_softc(dev); + callout_init(&sc->sc_callout, CALLOUT_MPSAFE); + callout_reset(&sc->sc_callout, hz * 5, octeon_rnd_harvest, sc); + + cvmx_rng_enable(); + + return (0); +} + +static int +octeon_rnd_detach(device_t dev) +{ + struct octeon_rnd_softc *sc; + + sc = device_get_softc(dev); + + callout_stop(&sc->sc_callout); + + return (0); +} + +static void +octeon_rnd_harvest(void *arg) +{ + struct octeon_rnd_softc *sc; + unsigned i; + + sc = arg; + + for (i = 0; i < OCTEON_RND_WORDS; i++) + sc->sc_entropy[i] = cvmx_rng_get_random64(); + random_harvest(sc->sc_entropy, sizeof sc->sc_entropy, + sizeof sc->sc_entropy * 8, 0, RANDOM_PURE); + + callout_reset(&sc->sc_callout, hz * 5, octeon_rnd_harvest, sc); +}