common/fdd-msg/fdd_msg.c

	fdd_msg.c revision dfe4040d6edf92f7d63a1cbac17c5da83512671b
/*
 * 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 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * fdd messenger
 *
 * This module sends fdd running on service processor a message which
 * indicates the Solaris host FMA capability when fmd is started. The
 * message is sent via the BMC driver (KCS interface) to the IPMI stack
 * of ILOM using the IPMI Sun OEM core tunnel command. The sub-command
 * is CORE_TUNNEL_SUBCMD_HOSTCAP. The IPMI stack posts an host FMA
 * capability event to the event manager upon receiving this message.
 * fdd subscribes to the event manager for this event. Upon receving
 * this event, fdd will adjust its configuration.
 *
 */

#include <errno.h>
#include <stdio.h>
#include <strings.h>
#include <sys/systeminfo.h>
#include <libipmi.h>
#include <fm/fmd_api.h>

#define CMD_SUNOEM_CORE_TUNNEL 0x44
#define CORE_TUNNEL_SUBCMD_HOSTFMACAP 2
#define OEM_DATA_LENGTH 3
#define VERSION 0x10
#define HOST_CAPABILITY 2

static int
check_sunoem(ipmi_handle_t *ipmi_hdl)
{
    ipmi_deviceid_t *devid;

    if ((devid = ipmi_get_deviceid(ipmi_hdl)) == NULL)
        return (-1);

    if (!ipmi_is_sun_ilom(devid))
        return (-2);

    return (0);
}

/*ARGSUSED*/
static void
send_fma_cap(fmd_hdl_t *hdl, id_t id, void *data)
{
    ipmi_handle_t *ipmi_hdl;
    ipmi_cmd_t cmd;
    uint8_t oem_data[OEM_DATA_LENGTH];

    ipmi_hdl = fmd_hdl_getspecific(hdl);

    oem_data[0] = CORE_TUNNEL_SUBCMD_HOSTFMACAP;
    oem_data[1] = VERSION;
    oem_data[2] = HOST_CAPABILITY;

    cmd.ic_netfn = IPMI_NETFN_OEM;
    cmd.ic_lun = 0;
    cmd.ic_cmd = CMD_SUNOEM_CORE_TUNNEL;
    cmd.ic_dlen = OEM_DATA_LENGTH;
    cmd.ic_data = oem_data;

    if (ipmi_send(ipmi_hdl, &cmd) == NULL) {
        fmd_hdl_debug(hdl, "Failed to send Solaris FMA "
            "capability to fdd: %s", ipmi_errmsg(ipmi_hdl));
    }

    ipmi_close(ipmi_hdl);
    fmd_hdl_setspecific(hdl, NULL);
    fmd_hdl_unregister(hdl);
}

static const fmd_hdl_ops_t fmd_ops = {
    NULL,       /* fmdo_recv */
    send_fma_cap,   /* fmdo_timeout */
    NULL,       /* fmdo_close */
    NULL,       /* fmdo_stats */
    NULL,       /* fmdo_gc */
    NULL,       /* fmdo_send */
    NULL,       /* fmdo_topo */
};

static const fmd_prop_t fmd_props[] = {
    { "interval", FMD_TYPE_TIME, "1s" },
    { NULL, 0, NULL }
};

static const fmd_hdl_info_t fmd_info = {
    "fdd Messenger", "1.0", &fmd_ops, fmd_props
};

void
_fmd_init(fmd_hdl_t *hdl)
{
    ipmi_handle_t   *ipmi_hdl;
    int error;
    char *msg;
    char isa[8];

    /* For now the module only sends message to ILOM on i386 platforms */
    if ((sysinfo(SI_ARCHITECTURE, isa, sizeof (isa)) == -1) ||
        (strncmp(isa, "i386", 4) != 0))
        return;

    if (fmd_hdl_register(hdl, FMD_API_VERSION, &fmd_info) != 0)
        return;

    if ((ipmi_hdl = ipmi_open(&error, &msg, IPMI_TRANSPORT_BMC, NULL))
        == NULL) {
        /*
         * If /dev/bmc doesn't exist on the system, then unload the
         * module without doing anything.
         */
        if (error != EIPMI_BMC_OPEN_FAILED)
            fmd_hdl_abort(hdl, "Failed to initialize IPMI "
                "connection: %s\n", msg);
        fmd_hdl_debug(hdl, "Failed to load: no IPMI connection "
            "present");
        fmd_hdl_unregister(hdl);
        return;
    }

    /*
     * Check if it's Sun ILOM
     */
    if (check_sunoem(ipmi_hdl) != 0) {
        fmd_hdl_debug(hdl, "Service Processor does not run "
            "Sun ILOM");
        ipmi_close(ipmi_hdl);
        fmd_hdl_unregister(hdl);
        return;
    }

    fmd_hdl_setspecific(hdl, ipmi_hdl);

    /*
     * Setup the timer.
     */
    (void) fmd_timer_install(hdl, NULL, NULL, 2000000000ULL);
}

void
_fmd_fini(fmd_hdl_t *hdl)
{
    ipmi_handle_t *ipmi_hdl = fmd_hdl_getspecific(hdl);

    if (ipmi_hdl) {
        ipmi_close(ipmi_hdl);
    }
}