/*
 * 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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * The Ethernet Over Infiniband driver
 */

#include <sys/types.h>
#include <sys/conf.h>
#include <sys/devops.h>
#include <sys/kmem.h>
#include <sys/ksynch.h>
#include <sys/modctl.h>
#include <sys/stat.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>

#include <sys/mac_provider.h>
#include <sys/mac_ether.h>

#include <sys/ib/clients/eoib/eib_impl.h>

/*
 * Driver entry point declarations
 */
static int eib_attach(dev_info_t *, ddi_attach_cmd_t);
static int eib_detach(dev_info_t *, ddi_detach_cmd_t);

/*
 * MAC callbacks
 */
static int eib_m_stat(void *, uint_t, uint64_t *);
static int eib_m_start(void *);
static void eib_m_stop(void *);
static int eib_m_promisc(void *, boolean_t);
static int eib_m_multicast(void *, boolean_t, const uint8_t *);
static int eib_m_unicast(void *, const uint8_t *);
static mblk_t *eib_m_tx(void *, mblk_t *);
static boolean_t eib_m_getcapab(void *, mac_capab_t, void *);
static int eib_m_setprop(void *, const char *, mac_prop_id_t, uint_t,
    const void *);
static int eib_m_getprop(void *, const char *, mac_prop_id_t, uint_t, void *);
static void eib_m_propinfo(void *, const char *, mac_prop_id_t,
    mac_prop_info_handle_t);

/*
 * Devops definition
 */
DDI_DEFINE_STREAM_OPS(eib_ops, nulldev, nulldev, eib_attach, eib_detach,
    nodev, NULL, D_MP, NULL, ddi_quiesce_not_needed);

/*
 * Module Driver Info
 */
static struct modldrv eib_modldrv = {
        &mod_driverops,         /* Driver module */
        "EoIB Driver",          /* Driver name and version */
        &eib_ops,               /* Driver ops */
};

/*
 * Module Linkage
 */
static struct modlinkage eib_modlinkage = {
        MODREV_1, (void *)&eib_modldrv, NULL
};

/*
 * GLDv3 entry points
 */
#define EIB_M_CALLBACK_FLAGS    \
        (MC_GETCAPAB | MC_SETPROP | MC_GETPROP | MC_PROPINFO)
static mac_callbacks_t eib_m_callbacks = {
        EIB_M_CALLBACK_FLAGS,
        eib_m_stat,
        eib_m_start,
        eib_m_stop,
        eib_m_promisc,
        eib_m_multicast,
        eib_m_unicast,
        eib_m_tx,
        NULL,
        NULL,
        eib_m_getcapab,
        NULL,
        NULL,
        eib_m_setprop,
        eib_m_getprop,
        eib_m_propinfo
};

/*
 * Async handler callback for ibt events
 */
static ibt_clnt_modinfo_t eib_clnt_modinfo = {
        IBTI_V_CURR,
        IBT_NETWORK,
        eib_ibt_async_handler,
        NULL,
        EIB_DRV_NAME
};

/*
 * Driver State Pointer
 */
void *eib_state;

/*
 * Declarations private to this file
 */
static int eib_state_init(eib_t *);
static int eib_add_event_callbacks(eib_t *);
static int eib_register_with_mac(eib_t *, dev_info_t *);
static void eib_rb_attach(eib_t *, uint_t);
static void eib_rb_state_init(eib_t *);
static void eib_rb_add_event_callbacks(eib_t *);
static void eib_rb_register_with_mac(eib_t *);

/*
 * Definitions private to this file
 */
#define EIB_ATTACH_STATE_ALLOCD         0x01
#define EIB_ATTACH_PROPS_PARSED         0x02
#define EIB_ATTACH_STATE_INIT_DONE      0x04
#define EIB_ATTACH_IBT_ATT_DONE         0x08
#define EIB_ATTACH_EV_CBS_ADDED         0x10
#define EIB_ATTACH_REGISTER_MAC_DONE    0x20

int
_init()
{
        int ret;

        if (ddi_name_to_major(EIB_DRV_NAME) == (major_t)-1)
                return (ENODEV);

        if ((ret = ddi_soft_state_init(&eib_state, sizeof (eib_t), 0)) != 0)
                return (ret);

        mac_init_ops(&eib_ops, EIB_DRV_NAME);
        if ((ret = mod_install(&eib_modlinkage)) != 0) {
                mac_fini_ops(&eib_ops);
                ddi_soft_state_fini(&eib_state);
                return (ret);
        }

        eib_debug_init();

        return (ret);
}

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

int
_fini()
{
        int ret;

        if ((ret = mod_remove(&eib_modlinkage)) != 0)
                return (ret);

        eib_debug_fini();

        mac_fini_ops(&eib_ops);
        ddi_soft_state_fini(&eib_state);

        return (ret);
}

static int
eib_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
        eib_t *ss;
        ibt_status_t ret;
        int instance;
        uint_t progress = 0;

        if (cmd != DDI_ATTACH)
                return (DDI_FAILURE);

        /*
         * Allocate softstate for this instance
         */
        instance = ddi_get_instance(dip);
        if (ddi_soft_state_zalloc(eib_state, instance) == DDI_FAILURE)
                goto attach_fail;

        progress |= EIB_ATTACH_STATE_ALLOCD;

        ss = ddi_get_soft_state(eib_state, instance);
        ss->ei_dip = dip;
        ss->ei_instance = (uint_t)instance;

        /*
         * Parse the node properties and get the gateway parameters
         * for this instance
         */
        if (eib_get_props(ss) != EIB_E_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance,
                    "eib_attach: eib_get_props() failed");
                goto attach_fail;
        }
        progress |= EIB_ATTACH_PROPS_PARSED;

        /*
         * Do per-state initialization
         */
        if (eib_state_init(ss) != EIB_E_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance,
                    "eib_attach: eib_state_init() failed");
                goto attach_fail;
        }
        progress |= EIB_ATTACH_STATE_INIT_DONE;

        /*
         * Attach to IBTL
         */
        if ((ret = ibt_attach(&eib_clnt_modinfo, ss->ei_dip, ss,
            &ss->ei_ibt_hdl)) != IBT_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance,
                    "eib_attach: ibt_attach() failed, ret=%d", ret);
                goto attach_fail;
        }
        progress |= EIB_ATTACH_IBT_ATT_DONE;

        /*
         * Register NDI event callbacks with EoIB nexus
         */
        if (eib_add_event_callbacks(ss) != EIB_E_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance,
                    "eib_attach: eib_add_event_callbacks() failed");
                goto attach_fail;
        }
        progress |= EIB_ATTACH_EV_CBS_ADDED;

        /*
         * Register with mac layer
         */
        if (eib_register_with_mac(ss, dip) != EIB_E_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance,
                    "eib_attach: eib_register_with_mac() failed");
                goto attach_fail;
        }
        progress |= EIB_ATTACH_REGISTER_MAC_DONE;

        return (DDI_SUCCESS);

attach_fail:
        eib_rb_attach(ss, progress);
        return (DDI_FAILURE);
}

static int
eib_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
        eib_t *ss;
        int instance;

        if (cmd != DDI_DETACH)
                return (DDI_FAILURE);

        instance = ddi_get_instance(dip);
        ss = ddi_get_soft_state(eib_state, instance);

        /*
         * If we had not cleaned up rx buffers (and hca resources) during
         * unplumb because they were stuck with the nw layer at the time,
         * we can try to clean them up now before doing the detach.
         */
        eib_mac_set_nic_state(ss, EIB_NIC_STOPPING);

        eib_rb_rsrc_setup_bufs(ss, B_FALSE);
        if (ss->ei_tx || ss->ei_rx || ss->ei_lso) {
                EIB_DPRINTF_WARN(ss->ei_instance,
                    "eib_detach: buffers still not returned "
                    "(tx=0x%llx, rx=0x%llx, lso=0x%llx), could "
                    "not detach", ss->ei_tx, ss->ei_rx, ss->ei_lso);
                eib_mac_clr_nic_state(ss, EIB_NIC_STOPPING);
                return (DDI_FAILURE);
        }
        if (ss->ei_hca_hdl) {
                eib_rb_ibt_hca_init(ss, ~0);
        }
        eib_mac_clr_nic_state(ss, EIB_NIC_STOPPING);

        eib_rb_attach(ss, ~0);

        return (DDI_SUCCESS);
}

static int
eib_m_stat(void *arg, uint_t stat, uint64_t *val)
{
        eib_t *ss = arg;
        eib_stats_t *stats = ss->ei_stats;

        switch (stat) {
        case MAC_STAT_IFSPEED:
                *val = ss->ei_props->ep_ifspeed;
                break;

        case MAC_STAT_OBYTES:
                *val = stats->st_obytes;
                break;

        case MAC_STAT_OPACKETS:
                *val = stats->st_opkts;
                break;

        case MAC_STAT_BRDCSTXMT:
                *val = stats->st_brdcstxmit;
                break;

        case MAC_STAT_MULTIXMT:
                *val = stats->st_multixmit;
                break;

        case MAC_STAT_OERRORS:
                *val = stats->st_oerrors;
                break;

        case MAC_STAT_NOXMTBUF:
                *val = stats->st_noxmitbuf;
                break;

        case MAC_STAT_RBYTES:
                *val = stats->st_rbytes;
                break;

        case MAC_STAT_IPACKETS:
                *val = stats->st_ipkts;
                break;

        case MAC_STAT_BRDCSTRCV:
                *val = stats->st_brdcstrcv;
                break;

        case MAC_STAT_MULTIRCV:
                *val = stats->st_multircv;
                break;

        case MAC_STAT_IERRORS:
                *val = stats->st_ierrors;
                break;

        case MAC_STAT_NORCVBUF:
                *val = stats->st_norcvbuf;
                break;

        case ETHER_STAT_LINK_DUPLEX:
                *val = LINK_DUPLEX_FULL;
                break;

        default:
                return (ENOTSUP);
        }

        return (0);
}

static int
eib_m_start(void *arg)
{
        eib_t *ss = arg;
        int ret = -1;

        eib_mac_set_nic_state(ss, EIB_NIC_STARTING);

        if ((ss->ei_node_state->ns_nic_state & EIB_NIC_STARTED) == 0)
                ret = eib_mac_start(ss);

        if (ret == 0)
                eib_mac_upd_nic_state(ss, EIB_NIC_STARTING, EIB_NIC_STARTED);
        else
                eib_mac_clr_nic_state(ss, EIB_NIC_STARTING);

        return (ret);
}

static void
eib_m_stop(void *arg)
{
        eib_t *ss = arg;

        eib_mac_set_nic_state(ss, EIB_NIC_STOPPING);

        if ((ss->ei_node_state->ns_nic_state & EIB_NIC_STARTED) != 0)
                eib_mac_stop(ss);

        eib_mac_clr_nic_state(ss, EIB_NIC_STARTED|EIB_NIC_STOPPING);
}

static int
eib_m_promisc(void *arg, boolean_t flag)
{
        eib_t *ss = arg;

        if ((ss->ei_node_state->ns_nic_state & EIB_NIC_STARTED) == 0)
                return (0);

        return (eib_mac_promisc(ss, flag));
}

static int
eib_m_multicast(void *arg, boolean_t add, const uint8_t *mcast_mac)
{
        eib_t *ss = arg;

        if ((ss->ei_node_state->ns_nic_state & EIB_NIC_STARTED) == 0)
                return (0);

        /*
         * We don't have any knowledge which of the vnics built on top of
         * the physlink is this multicast group relevant for.  We'll join
         * it for vnic0 for now.
         *
         * Since the tx routine in EoIB currently piggy backs all multicast
         * traffic over the broadcast channel, and all vnics are joined to
         * the broadcast address when they're created, everyone should receive
         * all multicast traffic anyway.
         *
         * On the rx side, we'll check if the incoming multicast address is
         * either on the vnic's list of mcgs joined to (which will only be the
         * broadcast address) or on vnic0's list of mcgs.  If we find a match,
         * we let the packet come through.
         *
         * This isn't perfect, but it's the best we can do given that we don't
         * have any vlan information corresponding to this multicast address.
         *
         * Also, for now we'll use the synchronous multicast joins and
         * leaves instead of the asynchronous mechanism provided by
         * ibt_join_mcg() since that involves additional complexity for failed
         * joins and removals.
         */
        return (eib_mac_multicast(ss, add, (uint8_t *)mcast_mac));
}

static int
eib_m_unicast(void *arg, const uint8_t *macaddr)
{
        eib_t *ss = arg;
        eib_vnic_t *vnic;

        if ((ss->ei_node_state->ns_nic_state & EIB_NIC_STARTED) == 0)
                return (0);

        mutex_enter(&ss->ei_vnic_lock);

        vnic = ss->ei_vnic[0];
        if (bcmp(macaddr, vnic->vn_login_data.ld_assigned_mac,
            ETHERADDRL) == 0) {
                mutex_exit(&ss->ei_vnic_lock);
                return (0);
        }

        mutex_exit(&ss->ei_vnic_lock);

        return (EINVAL);
}

static mblk_t *
eib_m_tx(void *arg, mblk_t *mp)
{
        eib_t *ss = arg;
        mblk_t *next;

        /*
         * If the nic hasn't been started, drop the message(s)
         */
        if ((ss->ei_node_state->ns_nic_state & EIB_NIC_STARTED) == 0) {
                freemsgchain(mp);
                return (NULL);
        }

        for (; mp != NULL; mp = next) {
                /*
                 * Detach this message from the message chain
                 */
                next = mp->b_next;
                mp->b_next = NULL;

                /*
                 * Attempt to send the message; if we fail (likely due
                 * to lack of resources), reattach this message to the
                 * chain and return the unsent chain back.  When we're
                 * ready to send again, we'll issue a mac_tx_update().
                 */
                if (eib_mac_tx(ss, mp) != EIB_E_SUCCESS) {
                        mp->b_next = next;
                        break;
                }
        }

        return (mp);
}

static boolean_t
eib_m_getcapab(void *arg, mac_capab_t cap, void *cap_data)
{
        eib_t *ss = arg;
        eib_caps_t *caps = ss->ei_caps;
        eib_caps_t s_caps;
        ibt_hca_attr_t hca_attrs;
        ibt_status_t ret;

        /*
         * If we haven't been plumbed yet, try getting the hca attributes
         * and figure out the capabilities now
         */
        if (caps == NULL) {
                ASSERT(ss->ei_props != NULL);

                ret = ibt_query_hca_byguid(ss->ei_props->ep_hca_guid,
                    &hca_attrs);
                if (ret == IBT_SUCCESS) {
                        eib_ibt_record_capab(ss, &hca_attrs, &s_caps);
                        caps = &s_caps;
                }
        }

        if ((caps != NULL) && (cap == MAC_CAPAB_HCKSUM)) {
                uint32_t *tx_flags = cap_data;

                if (caps->cp_cksum_flags == 0) {
                        EIB_DPRINTF_VERBOSE(ss->ei_instance,
                            "eib_m_getcapab: hw cksum disabled, cksum_flags=0");
                        return (B_FALSE);
                }

                *tx_flags = caps->cp_cksum_flags;

                return (B_TRUE);

        } else if ((caps != NULL) && (cap == MAC_CAPAB_LSO)) {
                mac_capab_lso_t *cap_lso = cap_data;

                /*
                 * If the HCA supports LSO, it will advertise a non-zero
                 * "max lso size" parameter. Also, LSO relies on hw
                 * checksum being available.  Finally, if the HCA
                 * doesn't provide the reserved-lkey capability, LSO
                 * will adversely affect the performance.  So, we'll
                 * enable LSO only if we have a non-zero max lso size,
                 * support checksum offload and provide reserved lkey.
                 */
                if (caps->cp_lso_maxlen == 0 ||
                    caps->cp_cksum_flags == 0 ||
                    caps->cp_resv_lkey_capab == 0) {
                        EIB_DPRINTF_VERBOSE(ss->ei_instance, "eib_m_getcapab: "
                            "LSO disabled, lso_maxlen=0x%lx, "
                            "cksum_flags=0x%lx, resv_lkey_capab=%d",
                            caps->cp_lso_maxlen,
                            caps->cp_cksum_flags,
                            caps->cp_resv_lkey_capab);
                        return (B_FALSE);
                }

                cap_lso->lso_flags = LSO_TX_BASIC_TCP_IPV4;
                cap_lso->lso_basic_tcp_ipv4.lso_max = caps->cp_lso_maxlen - 1;

                return (B_TRUE);
        }

        return (B_FALSE);
}

/*ARGSUSED*/
static int
eib_m_setprop(void *arg, const char *pr_name, mac_prop_id_t pr_num,
    uint_t pr_valsize, const void *pr_val)
{
        return (ENOTSUP);
}

static int
eib_m_getprop(void *arg, const char *pr_name, mac_prop_id_t pr_num,
    uint_t pr_valsize, void *pr_val)
{
        eib_t *ss = arg;
        link_duplex_t duplex = LINK_DUPLEX_FULL;
        uint64_t speed = ss->ei_props->ep_ifspeed;
        int err = 0;

        switch (pr_num) {
        case MAC_PROP_DUPLEX:
                ASSERT(pr_valsize >= sizeof (link_duplex_t));
                bcopy(&duplex, pr_val, sizeof (link_duplex_t));
                break;

        case MAC_PROP_SPEED:
                ASSERT(pr_valsize >= sizeof (uint64_t));
                bcopy(&speed, pr_val, sizeof (speed));
                break;

        case MAC_PROP_PRIVATE:
                if (strcmp(pr_name, EIB_DLPROP_GW_EPORT_STATE) == 0) {
                        if (ss->ei_gw_eport_state == FIP_EPORT_UP) {
                                (void) snprintf(pr_val, pr_valsize,
                                    "%s", "up");
                        } else {
                                (void) snprintf(pr_val, pr_valsize,
                                    "%s", "down");
                        }
                } else if (strcmp(pr_name, EIB_DLPROP_HCA_GUID) == 0) {
                        (void) snprintf(pr_val, pr_valsize, "%llX",
                            (u_longlong_t)ss->ei_props->ep_hca_guid);

                } else if (strcmp(pr_name, EIB_DLPROP_PORT_GUID) == 0) {
                        (void) snprintf(pr_val, pr_valsize, "%llX",
                            (u_longlong_t)((ss->ei_props->ep_sgid).gid_guid));
                }
                break;

        default:
                err = ENOTSUP;
                break;
        }

        return (err);
}

/*ARGSUSED*/
static void
eib_m_propinfo(void *arg, const char *pr_name, mac_prop_id_t pr_num,
    mac_prop_info_handle_t prh)
{
        switch (pr_num) {
        case MAC_PROP_DUPLEX:
        case MAC_PROP_SPEED:
                mac_prop_info_set_perm(prh, MAC_PROP_PERM_READ);
                break;

        case MAC_PROP_MTU:
                mac_prop_info_set_perm(prh, MAC_PROP_PERM_READ);
                mac_prop_info_set_range_uint32(prh, ETHERMTU, ETHERMTU);
                break;

        case MAC_PROP_PRIVATE:
                if (strcmp(pr_name, EIB_DLPROP_GW_EPORT_STATE) == 0) {
                        mac_prop_info_set_default_str(prh, "up ");
                        mac_prop_info_set_perm(prh, MAC_PROP_PERM_READ);
                } else if (strcmp(pr_name, EIB_DLPROP_HCA_GUID) == 0) {
                        mac_prop_info_set_perm(prh, MAC_PROP_PERM_READ);
                } else if (strcmp(pr_name, EIB_DLPROP_PORT_GUID) == 0) {
                        mac_prop_info_set_perm(prh, MAC_PROP_PERM_READ);
                }
                break;
        }
}

static int
eib_state_init(eib_t *ss)
{
        kthread_t *kt;

        /*
         * Initialize synchronization primitives
         */
        mutex_init(&ss->ei_vnic_lock, NULL, MUTEX_DRIVER, NULL);
        mutex_init(&ss->ei_av_lock, NULL, MUTEX_DRIVER, NULL);
        mutex_init(&ss->ei_ev_lock, NULL, MUTEX_DRIVER, NULL);
        mutex_init(&ss->ei_rxpost_lock, NULL, MUTEX_DRIVER, NULL);
        mutex_init(&ss->ei_vnic_req_lock, NULL, MUTEX_DRIVER, NULL);
        mutex_init(&ss->ei_ka_vnics_lock, NULL, MUTEX_DRIVER, NULL);
        cv_init(&ss->ei_vnic_cv, NULL, CV_DEFAULT, NULL);
        cv_init(&ss->ei_ev_cv, NULL, CV_DEFAULT, NULL);
        cv_init(&ss->ei_rxpost_cv, NULL, CV_DEFAULT, NULL);
        cv_init(&ss->ei_vnic_req_cv, NULL, CV_DEFAULT, NULL);
        cv_init(&ss->ei_ka_vnics_cv, NULL, CV_DEFAULT, NULL);

        /*
         * Create a node state structure and initialize
         */
        ss->ei_node_state = kmem_zalloc(sizeof (eib_node_state_t), KM_SLEEP);
        ss->ei_node_state->ns_link_state = LINK_STATE_UNKNOWN;
        mutex_init(&ss->ei_node_state->ns_lock, NULL, MUTEX_DRIVER, NULL);
        cv_init(&ss->ei_node_state->ns_cv, NULL, CV_DEFAULT, NULL);

        /*
         * Allocate for gathering statistics
         */
        ss->ei_stats = kmem_zalloc(sizeof (eib_stats_t), KM_SLEEP);

        /*
         * Start up service threads
         */
        kt = thread_create(NULL, 0, eib_events_handler, ss, 0,
            &p0, TS_RUN, minclsyspri);
        ss->ei_events_handler = kt->t_did;

        kt = thread_create(NULL, 0, eib_refill_rwqes, ss, 0,
            &p0, TS_RUN, minclsyspri);
        ss->ei_rwqes_refiller = kt->t_did;

        kt = thread_create(NULL, 0, eib_vnic_creator, ss, 0,
            &p0, TS_RUN, minclsyspri);
        ss->ei_vnic_creator = kt->t_did;

        kt = thread_create(NULL, 0, eib_manage_keepalives, ss, 0,
            &p0, TS_RUN, minclsyspri);
        ss->ei_keepalives_manager = kt->t_did;

        /*
         * Set default state of gw eport
         */
        ss->ei_gw_eport_state = FIP_EPORT_UP;

        /*
         * Do static initializations of common structures
         */
        eib_reserved_gid.gid_prefix = 0;
        eib_reserved_gid.gid_guid = 0;

        return (EIB_E_SUCCESS);
}

static int
eib_add_event_callbacks(eib_t *ss)
{
        int ret;
        ddi_eventcookie_t login_ack_evc;
        ddi_eventcookie_t gw_alive_evc;
        ddi_eventcookie_t gw_info_evc;

        /*
         * Add callback for receiving vnic login acks from the gateway
         */
        if ((ret = ddi_get_eventcookie(ss->ei_dip, EIB_NDI_EVENT_LOGIN_ACK,
            &login_ack_evc)) != DDI_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance, "eib_add_event_callbacks: "
                    "ddi_get_eventcookie(LOGIN_ACK) failed, ret=%d", ret);
                return (EIB_E_FAILURE);
        }
        if ((ret = ddi_add_event_handler(ss->ei_dip, login_ack_evc,
            eib_login_ack_cb, ss, &ss->ei_login_ack_cb)) != DDI_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance, "eib_add_event_callbacks: "
                    "ddi_add_event_handler(LOGIN_ACK) failed, ret=%d", ret);
                return (EIB_E_FAILURE);
        }

        /*
         * Add callback for receiving status on gateway transitioning from
         * not-available to available
         */
        if ((ret = ddi_get_eventcookie(ss->ei_dip, EIB_NDI_EVENT_GW_AVAILABLE,
            &gw_alive_evc)) != DDI_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance, "eib_add_event_callbacks: "
                    "ddi_get_eventcookie(GW_AVAILABLE) failed, ret=%d", ret);
                (void) ddi_remove_event_handler(ss->ei_login_ack_cb);
                return (EIB_E_FAILURE);
        }
        if ((ret = ddi_add_event_handler(ss->ei_dip, gw_alive_evc,
            eib_gw_alive_cb, ss, &ss->ei_gw_alive_cb)) != DDI_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance, "eib_add_event_callbacks: "
                    "ddi_add_event_handler(GW_AVAILABLE) failed, ret=%d", ret);
                (void) ddi_remove_event_handler(ss->ei_login_ack_cb);
                return (EIB_E_FAILURE);
        }

        /*
         * Add callback for receiving gateway info update
         */
        if ((ret = ddi_get_eventcookie(ss->ei_dip, EIB_NDI_EVENT_GW_INFO_UPDATE,
            &gw_info_evc)) != DDI_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance, "eib_add_event_callbacks: "
                    "ddi_get_eventcookie(GW_INFO_UPDATE) failed, ret=%d", ret);
                (void) ddi_remove_event_handler(ss->ei_gw_alive_cb);
                (void) ddi_remove_event_handler(ss->ei_login_ack_cb);
                return (EIB_E_FAILURE);
        }
        if ((ret = ddi_add_event_handler(ss->ei_dip, gw_info_evc,
            eib_gw_info_cb, ss, &ss->ei_gw_info_cb)) != DDI_SUCCESS) {
                EIB_DPRINTF_ERR(ss->ei_instance, "eib_add_event_callbacks: "
                    "ddi_add_event_handler(GW_INFO) failed, ret=%d", ret);
                (void) ddi_remove_event_handler(ss->ei_gw_alive_cb);
                (void) ddi_remove_event_handler(ss->ei_login_ack_cb);
                return (EIB_E_FAILURE);
        }

        return (EIB_E_SUCCESS);
}

static int
eib_register_with_mac(eib_t *ss, dev_info_t *dip)
{
        mac_register_t *macp;
        int ret;

        if ((macp = mac_alloc(MAC_VERSION)) == NULL) {
                EIB_DPRINTF_ERR(ss->ei_instance, "eib_register_with_mac: "
                    "mac_alloc(MAC_VERSION=%d) failed", MAC_VERSION);
                return (EIB_E_FAILURE);
        }

        /*
         * Note that when we register with mac during attach, we don't
         * have the mac address yet (we'll get that after we login into
         * the gateway) so we'll simply register a zero macaddr that
         * we'll overwrite later during plumb, in eib_m_start(). Likewise,
         * we'll also update the max-sdu with the correct MTU after we
         * figure it out when we login to the gateway during plumb.
         */
        macp->m_type_ident = MAC_PLUGIN_IDENT_ETHER;
        macp->m_driver = ss;
        macp->m_dip = dip;
        macp->m_src_addr = eib_zero_mac;
        macp->m_callbacks = &eib_m_callbacks;
        macp->m_min_sdu = 0;
        macp->m_max_sdu = ETHERMTU;
        macp->m_margin = VLAN_TAGSZ;
        macp->m_priv_props = eib_pvt_props;

        ret = mac_register(macp, &ss->ei_mac_hdl);
        mac_free(macp);

        if (ret != 0) {
                EIB_DPRINTF_ERR(ss->ei_instance, "eib_register_with_mac: "
                    "mac_register() failed, ret=%d", ret);
                return (EIB_E_FAILURE);
        }

        return (EIB_E_SUCCESS);
}

static void
eib_rb_attach(eib_t *ss, uint_t progress)
{
        ibt_status_t ret;
        int instance;

        if (progress & EIB_ATTACH_REGISTER_MAC_DONE)
                eib_rb_register_with_mac(ss);

        if (progress & EIB_ATTACH_EV_CBS_ADDED)
                eib_rb_add_event_callbacks(ss);

        if (progress & EIB_ATTACH_IBT_ATT_DONE) {
                ret = ibt_detach(ss->ei_ibt_hdl);
                if (ret != IBT_SUCCESS) {
                        EIB_DPRINTF_WARN(ss->ei_instance, "eib_rb_attach: "
                            "ibt_detach() failed, ret=%d", ret);
                }
                ss->ei_ibt_hdl = NULL;
        }

        if (progress & EIB_ATTACH_STATE_INIT_DONE)
                eib_rb_state_init(ss);

        if (progress & EIB_ATTACH_PROPS_PARSED)
                eib_rb_get_props(ss);

        if (progress & EIB_ATTACH_STATE_ALLOCD) {
                instance = ddi_get_instance(ss->ei_dip);
                ddi_soft_state_free(eib_state, instance);
        }
}

static void
eib_rb_state_init(eib_t *ss)
{
        /*
         * Terminate service threads
         */
        if (ss->ei_keepalives_manager) {
                eib_stop_manage_keepalives(ss);
                ss->ei_keepalives_manager = 0;
        }
        if (ss->ei_vnic_creator) {
                eib_stop_vnic_creator(ss);
                ss->ei_vnic_creator = 0;
        }
        if (ss->ei_rwqes_refiller) {
                eib_stop_refill_rwqes(ss);
                ss->ei_rwqes_refiller = 0;
        }
        if (ss->ei_events_handler) {
                eib_stop_events_handler(ss);
                ss->ei_events_handler = 0;
        }

        /*
         * Remove space allocated for gathering statistics
         */
        if (ss->ei_stats) {
                kmem_free(ss->ei_stats, sizeof (eib_stats_t));
                ss->ei_stats = NULL;
        }

        /*
         * Remove space allocated for keeping node state
         */
        if (ss->ei_node_state) {
                cv_destroy(&ss->ei_node_state->ns_cv);
                mutex_destroy(&ss->ei_node_state->ns_lock);
                kmem_free(ss->ei_node_state, sizeof (eib_node_state_t));
                ss->ei_node_state = NULL;
        }

        /*
         * Finally, destroy all synchronization resources
         */
        cv_destroy(&ss->ei_ka_vnics_cv);
        cv_destroy(&ss->ei_vnic_req_cv);
        cv_destroy(&ss->ei_rxpost_cv);
        cv_destroy(&ss->ei_ev_cv);
        cv_destroy(&ss->ei_vnic_cv);
        mutex_destroy(&ss->ei_ka_vnics_lock);
        mutex_destroy(&ss->ei_vnic_req_lock);
        mutex_destroy(&ss->ei_rxpost_lock);
        mutex_destroy(&ss->ei_ev_lock);
        mutex_destroy(&ss->ei_av_lock);
        mutex_destroy(&ss->ei_vnic_lock);
}

static void
eib_rb_add_event_callbacks(eib_t *ss)
{
        ddi_eventcookie_t evc;

        if (ddi_get_eventcookie(ss->ei_dip, EIB_NDI_EVENT_GW_INFO_UPDATE,
            &evc) == DDI_SUCCESS) {
                (void) ddi_remove_event_handler(ss->ei_gw_info_cb);
                ss->ei_gw_info_cb = NULL;
        }

        if (ddi_get_eventcookie(ss->ei_dip, EIB_NDI_EVENT_GW_AVAILABLE,
            &evc) == DDI_SUCCESS) {
                (void) ddi_remove_event_handler(ss->ei_gw_alive_cb);
                ss->ei_gw_alive_cb = NULL;
        }

        if (ddi_get_eventcookie(ss->ei_dip, EIB_NDI_EVENT_LOGIN_ACK,
            &evc) == DDI_SUCCESS) {
                (void) ddi_remove_event_handler(ss->ei_login_ack_cb);
                ss->ei_login_ack_cb = NULL;
        }
}

static void
eib_rb_register_with_mac(eib_t *ss)
{
        int ret;

        if ((ret = mac_unregister(ss->ei_mac_hdl)) != 0) {
                EIB_DPRINTF_WARN(ss->ei_instance,
                    "eib_rb_register_with_mac: "
                    "mac_unregister() failed, ret=%d", ret);
        }

        ss->ei_mac_hdl = NULL;
}