cpu/amd_opteron/ao_main.c

	ao_main.c revision fb2f18f820d90b001aea4fb27dd654bc1263c440
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * The CPU module for the AMD Athlon64 and Opteron processors
 */

#include <sys/types.h>
#include <sys/cmn_err.h>
#include <sys/sunddi.h>
#include <sys/cpu_module_impl.h>
#include <sys/cpuvar.h>
#include <sys/x86_archext.h>
#include <sys/kmem.h>
#include <sys/pghw.h>
#include <sys/modctl.h>
#include <sys/mc.h>
#include <sys/mca_x86.h>

#include "ao.h"

static struct ao_chipshared *ao_shared[NCPU];

/*
 * This cpu module supports AMD family 0xf revisions B/C/D/E/F/G.  If
 * a family 0xf cpu beyond the rev G model limit is detected then
 * return ENOTSUP and let the generic x86 CPU module load instead.
 */
uint_t ao_model_limit = 0x6f;

static int
ao_init(cpu_t *cp, void **datap)
{
    uint_t chipid = pg_plat_hw_instance_id(CPU, PGHW_CHIP);
    struct ao_chipshared *sp, *osp;
    ao_data_t *ao;
    uint64_t cap;

    if (cpuid_getmodel(cp) >= ao_model_limit)
        return (ENOTSUP);

    if (!(x86_feature & X86_MCA))
        return (ENOTSUP);

    cap = rdmsr(IA32_MSR_MCG_CAP);
    if (!(cap & MCG_CAP_CTL_P))
        return (ENOTSUP);

    ao = *datap = kmem_zalloc(sizeof (ao_data_t), KM_SLEEP);
    ao->ao_cpu = cp;

    /*
     * Allocate the chipshared structure if it appears not to have been
     * allocated already (by a sibling core).  Install the newly
     * allocated pointer atomically in case a sibling core beats
     * us to it.
     */
    if ((sp = ao_shared[chipid]) == NULL) {
        sp = kmem_zalloc(sizeof (struct ao_chipshared), KM_SLEEP);
        osp = atomic_cas_ptr(&ao_shared[chipid], NULL, sp);
        if (osp != NULL) {
            kmem_free(sp, sizeof (struct ao_chipshared));
            sp = osp;
        }
    }
    ao->ao_shared = sp;

    return (0);
}

/*ARGSUSED*/
static void
ao_post_mpstartup(void *data)
{
    (void) ddi_install_driver("mc-amd");
}

static void
ao_fini(void *data)
{
    kmem_free(data, sizeof (ao_data_t));
}

const cmi_ops_t _cmi_ops = {
    ao_init,
    ao_mca_post_init,
    ao_post_mpstartup,
    ao_fini,
    ao_faulted_enter,
    ao_faulted_exit,
    ao_scrubber_enable,
    ao_mca_init,
    ao_mca_trap,
    ao_mca_inject,
    ao_mca_poke,
    ao_mc_register,
    ao_mc_getops
};

static struct modlcpu modlcpu = {
    &mod_cpuops,
    "AMD Athlon64/Opteron CPU Module"
};

static struct modlinkage modlinkage = {
    MODREV_1,
    (void *)&modlcpu,
    NULL
};

int
_init(void)
{
    int err;

    ao_mca_queue = errorq_create("ao_mca_queue",
        ao_mca_drain, NULL, AO_MCA_MAX_ERRORS * (max_ncpus + 1),
        sizeof (ao_cpu_logout_t), 1, ERRORQ_VITAL);

    if (ao_mca_queue == NULL)
        return (EAGAIN); /* errorq_create() logs a message for us */

    if ((err = mod_install(&modlinkage)) != 0) {
        errorq_destroy(ao_mca_queue);
        ao_mca_queue = NULL;
    }

    return (err);
}

int
_info(struct modinfo *modinfop)
{
    return (mod_info(&modlinkage, modinfop));
}

int
_fini(void)
{
    int err;

    if ((err = mod_remove(&modlinkage)) == 0)
        errorq_destroy(ao_mca_queue);

    return (err);
}