io/aggr/aggr_dev.c

/*
 * 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 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * IEEE 802.3ad Link Aggregation.
 */

#include <sys/conf.h>
#include <sys/modctl.h>
#include <sys/aggr.h>
#include <sys/aggr_impl.h>

/* module description */
#define AGGR_LINKINFO   "Link Aggregation MAC"

/* device info ptr, only one for instance 0 */
dev_info_t *aggr_dip = NULL;

static int aggr_getinfo(dev_info_t *, ddi_info_cmd_t, void *, void **);
static int aggr_attach(dev_info_t *, ddi_attach_cmd_t);
static int aggr_detach(dev_info_t *, ddi_detach_cmd_t);

DDI_DEFINE_STREAM_OPS(aggr_dev_ops, nulldev, nulldev, aggr_attach, aggr_detach,
    nodev, aggr_getinfo, D_MP, NULL, ddi_quiesce_not_supported);

static struct modldrv aggr_modldrv = {
    &mod_driverops,     /* Type of module.  This one is a driver */
    AGGR_LINKINFO,      /* short description */
    &aggr_dev_ops       /* driver specific ops */
};

static struct modlinkage modlinkage = {
    MODREV_1, &aggr_modldrv, NULL
};

int
_init(void)
{
    int err;

    mac_init_ops(&aggr_dev_ops, "aggr");
    if ((err = mod_install(&modlinkage)) != 0)
        mac_fini_ops(&aggr_dev_ops);
    return (err);
}

int
_fini(void)
{
    int err;

    if ((err = mod_remove(&modlinkage)) == 0)
        mac_fini_ops(&aggr_dev_ops);
    return (err);
}

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

/*ARGSUSED*/
static int
aggr_getinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg,
    void **result)
{
    switch (infocmd) {
    case DDI_INFO_DEVT2DEVINFO:
        *result = aggr_dip;
        return (DDI_SUCCESS);
    case DDI_INFO_DEVT2INSTANCE:
        *result = 0;
        return (DDI_SUCCESS);
    }
    return (DDI_FAILURE);
}

static int
aggr_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
    switch (cmd) {
    case DDI_ATTACH:
        if (ddi_get_instance(dip) != 0) {
            /* we only allow instance 0 to attach */
            return (DDI_FAILURE);
        }
        if (aggr_ioc_init() != 0)
            return (DDI_FAILURE);
        aggr_dip = dip;
        aggr_port_init();
        aggr_grp_init();
        aggr_lacp_init();
        return (DDI_SUCCESS);

    case DDI_RESUME:
        return (DDI_SUCCESS);

    default:
        return (DDI_FAILURE);
    }
}

/*ARGSUSED*/
static int
aggr_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
    switch (cmd) {
    case DDI_DETACH:
        if (aggr_grp_count() > 0)
            return (DDI_FAILURE);

        aggr_dip = NULL;
        aggr_port_fini();
        aggr_grp_fini();
        aggr_lacp_fini();
        aggr_ioc_fini();
        return (DDI_SUCCESS);

    case DDI_SUSPEND:
        return (DDI_SUCCESS);

    default:
        return (DDI_FAILURE);
    }
}