/* * 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 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * MAC Provider Interface. * * Interface for GLDv3 compatible NIC drivers. */ static void i_mac_notify_thread(void *); typedef void (*mac_notify_default_cb_fn_t)(mac_impl_t *); typedef struct mac_notify_default_cb_s { mac_notify_type_t mac_notify_type; mac_notify_default_cb_fn_t mac_notify_cb_fn; }mac_notify_default_cb_t; mac_notify_default_cb_t mac_notify_cb_list[] = { { MAC_NOTE_LINK, mac_fanout_recompute}, { MAC_NOTE_PROMISC, NULL}, { MAC_NOTE_UNICST, NULL}, { MAC_NOTE_TX, NULL}, { MAC_NOTE_RESOURCE, NULL}, { MAC_NOTE_DEVPROMISC, NULL}, { MAC_NOTE_FASTPATH_FLUSH, NULL}, { MAC_NOTE_SDU_SIZE, NULL}, { MAC_NOTE_MARGIN, NULL}, { MAC_NOTE_CAPAB_CHG, NULL}, { MAC_NNOTE, NULL}, }; /* * Driver support functions. */ /* REGISTRATION */ mac_register_t * mac_alloc(uint_t mac_version) { mac_register_t *mregp; /* * Make sure there isn't a version mismatch between the driver and * the framework. In the future, if multiple versions are * supported, this check could become more sophisticated. */ if (mac_version != MAC_VERSION) return (NULL); mregp = kmem_zalloc(sizeof (mac_register_t), KM_SLEEP); mregp->m_version = mac_version; return (mregp); } void mac_free(mac_register_t *mregp) { kmem_free(mregp, sizeof (mac_register_t)); } /* * mac_register() is how drivers register new MACs with the GLDv3 * framework. The mregp argument is allocated by drivers using the * mac_alloc() function, and can be freed using mac_free() immediately upon * return from mac_register(). Upon success (0 return value), the mhp * opaque pointer becomes the driver's handle to its MAC interface, and is * the argument to all other mac module entry points. */ /* ARGSUSED */ int mac_register(mac_register_t *mregp, mac_handle_t *mhp) { mac_impl_t *mip; mactype_t *mtype; int err = EINVAL; struct devnames *dnp = NULL; uint_t instance; boolean_t style1_created = B_FALSE; boolean_t style2_created = B_FALSE; char *driver; minor_t minor = 0; /* Find the required MAC-Type plugin. */ if ((mtype = mactype_getplugin(mregp->m_type_ident)) == NULL) return (EINVAL); /* Create a mac_impl_t to represent this MAC. */ mip = kmem_cache_alloc(i_mac_impl_cachep, KM_SLEEP); /* * The mac is not ready for open yet. */ mip->mi_state_flags |= MIS_DISABLED; /* * When a mac is registered, the m_instance field can be set to: * * 0: Get the mac's instance number from m_dip. * This is usually used for physical device dips. * * [1 .. MAC_MAX_MINOR-1]: Use the value as the mac's instance number. * For example, when an aggregation is created with the key option, * "key" will be used as the instance number. * * -1: Assign an instance number from [MAC_MAX_MINOR .. MAXMIN-1]. * This is often used when a MAC of a virtual link is registered * (e.g., aggregation when "key" is not specified, or vnic). * * Note that the instance number is used to derive the mi_minor field * of mac_impl_t, which will then be used to derive the name of kstats * and the devfs nodes. The first 2 cases are needed to preserve * backward compatibility. */ switch (mregp->m_instance) { case 0: instance = ddi_get_instance(mregp->m_dip); break; case ((uint_t)-1): minor = mac_minor_hold(B_TRUE); if (minor == 0) { err = ENOSPC; goto fail; } instance = minor - 1; break; default: instance = mregp->m_instance; if (instance >= MAC_MAX_MINOR) { err = EINVAL; goto fail; } break; } mip->mi_minor = (minor_t)(instance + 1); mip->mi_dip = mregp->m_dip; mip->mi_clients_list = NULL; mip->mi_nclients = 0; driver = (char *)ddi_driver_name(mip->mi_dip); /* Construct the MAC name as */ (void) snprintf(mip->mi_name, sizeof (mip->mi_name), "%s%d", driver, instance); mip->mi_driver = mregp->m_driver; mip->mi_type = mtype; mip->mi_margin = mregp->m_margin; mip->mi_info.mi_media = mtype->mt_type; mip->mi_info.mi_nativemedia = mtype->mt_nativetype; if (mregp->m_max_sdu <= mregp->m_min_sdu) goto fail; mip->mi_sdu_min = mregp->m_min_sdu; mip->mi_sdu_max = mregp->m_max_sdu; mip->mi_info.mi_addr_length = mip->mi_type->mt_addr_length; /* * If the media supports a broadcast address, cache a pointer to it * in the mac_info_t so that upper layers can use it. */ mip->mi_info.mi_brdcst_addr = mip->mi_type->mt_brdcst_addr; mip->mi_v12n_level = mregp->m_v12n; /* * Copy the unicast source address into the mac_info_t, but only if * the MAC-Type defines a non-zero address length. We need to * handle MAC-Types that have an address length of 0 * (point-to-point protocol MACs for example). */ if (mip->mi_type->mt_addr_length > 0) { if (mregp->m_src_addr == NULL) goto fail; mip->mi_info.mi_unicst_addr = kmem_alloc(mip->mi_type->mt_addr_length, KM_SLEEP); bcopy(mregp->m_src_addr, mip->mi_info.mi_unicst_addr, mip->mi_type->mt_addr_length); /* * Copy the fixed 'factory' MAC address from the immutable * info. This is taken to be the MAC address currently in * use. */ bcopy(mip->mi_info.mi_unicst_addr, mip->mi_addr, mip->mi_type->mt_addr_length); /* * At this point, we should set up the classification * rules etc but we delay it till mac_open() so that * the resource discovery has taken place and we * know someone wants to use the device. Otherwise * memory gets allocated for Rx ring structures even * during probe. */ /* Copy the destination address if one is provided. */ if (mregp->m_dst_addr != NULL) { bcopy(mregp->m_dst_addr, mip->mi_dstaddr, mip->mi_type->mt_addr_length); } } else if (mregp->m_src_addr != NULL) { goto fail; } /* * The format of the m_pdata is specific to the plugin. It is * passed in as an argument to all of the plugin callbacks. The * driver can update this information by calling * mac_pdata_update(). */ if (mregp->m_pdata != NULL) { /* * Verify that the plugin supports MAC plugin data and that * the supplied data is valid. */ if (!(mip->mi_type->mt_ops.mtops_ops & MTOPS_PDATA_VERIFY)) goto fail; if (!mip->mi_type->mt_ops.mtops_pdata_verify(mregp->m_pdata, mregp->m_pdata_size)) { goto fail; } mip->mi_pdata = kmem_alloc(mregp->m_pdata_size, KM_SLEEP); bcopy(mregp->m_pdata, mip->mi_pdata, mregp->m_pdata_size); mip->mi_pdata_size = mregp->m_pdata_size; } /* * Register the private properties. */ mac_register_priv_prop(mip, mregp->m_priv_props, mregp->m_priv_prop_count); /* * Stash the driver callbacks into the mac_impl_t, but first sanity * check to make sure all mandatory callbacks are set. */ if (mregp->m_callbacks->mc_getstat == NULL || mregp->m_callbacks->mc_start == NULL || mregp->m_callbacks->mc_stop == NULL || mregp->m_callbacks->mc_setpromisc == NULL || mregp->m_callbacks->mc_multicst == NULL) { goto fail; } mip->mi_callbacks = mregp->m_callbacks; if (mac_capab_get((mac_handle_t)mip, MAC_CAPAB_LEGACY, &mip->mi_capab_legacy)) { mip->mi_state_flags |= MIS_LEGACY; mip->mi_phy_dev = mip->mi_capab_legacy.ml_dev; } else { mip->mi_phy_dev = makedevice(ddi_driver_major(mip->mi_dip), ddi_get_instance(mip->mi_dip) + 1); } /* * Allocate a notification thread. thread_create blocks for memory * if needed, it never fails. */ mip->mi_notify_thread = thread_create(NULL, 0, i_mac_notify_thread, mip, 0, &p0, TS_RUN, minclsyspri); /* * Initialize the capabilities */ if (i_mac_capab_get((mac_handle_t)mip, MAC_CAPAB_VNIC, NULL)) mip->mi_state_flags |= MIS_IS_VNIC; if (i_mac_capab_get((mac_handle_t)mip, MAC_CAPAB_AGGR, NULL)) mip->mi_state_flags |= MIS_IS_AGGR; mac_addr_factory_init(mip); /* * Enforce the virtrualization level registered. */ if (mip->mi_v12n_level & MAC_VIRT_LEVEL1) { if (mac_init_rings(mip, MAC_RING_TYPE_RX) != 0 || mac_init_rings(mip, MAC_RING_TYPE_TX) != 0) goto fail; /* * The driver needs to register at least rx rings for this * virtualization level. */ if (mip->mi_rx_groups == NULL) goto fail; } /* * The driver must set mc_unicst entry point to NULL when it advertises * CAP_RINGS for rx groups. */ if (mip->mi_rx_groups != NULL) { if (mregp->m_callbacks->mc_unicst != NULL) goto fail; } else { if (mregp->m_callbacks->mc_unicst == NULL) goto fail; } /* * The driver must set mc_tx entry point to NULL when it advertises * CAP_RINGS for tx rings. */ if (mip->mi_tx_groups != NULL) { if (mregp->m_callbacks->mc_tx != NULL) goto fail; } else { if (mregp->m_callbacks->mc_tx == NULL) goto fail; } /* * Initialize MAC addresses. Must be called after mac_init_rings(). */ mac_init_macaddr(mip); mip->mi_share_capab.ms_snum = 0; if (mip->mi_v12n_level & MAC_VIRT_HIO) { (void) mac_capab_get((mac_handle_t)mip, MAC_CAPAB_SHARES, &mip->mi_share_capab); } /* * Initialize the kstats for this device. */ mac_stat_create(mip); /* Zero out any properties. */ bzero(&mip->mi_resource_props, sizeof (mac_resource_props_t)); /* set the gldv3 flag in dn_flags */ dnp = &devnamesp[ddi_driver_major(mip->mi_dip)]; LOCK_DEV_OPS(&dnp->dn_lock); dnp->dn_flags |= (DN_GLDV3_DRIVER | DN_NETWORK_DRIVER); UNLOCK_DEV_OPS(&dnp->dn_lock); if (mip->mi_minor < MAC_MAX_MINOR + 1) { /* Create a style-2 DLPI device */ if (ddi_create_minor_node(mip->mi_dip, driver, S_IFCHR, 0, DDI_NT_NET, CLONE_DEV) != DDI_SUCCESS) goto fail; style2_created = B_TRUE; /* Create a style-1 DLPI device */ if (ddi_create_minor_node(mip->mi_dip, mip->mi_name, S_IFCHR, mip->mi_minor, DDI_NT_NET, 0) != DDI_SUCCESS) goto fail; style1_created = B_TRUE; } mac_flow_l2tab_create(mip, &mip->mi_flow_tab); rw_enter(&i_mac_impl_lock, RW_WRITER); if (mod_hash_insert(i_mac_impl_hash, (mod_hash_key_t)mip->mi_name, (mod_hash_val_t)mip) != 0) { rw_exit(&i_mac_impl_lock); err = EEXIST; goto fail; } DTRACE_PROBE2(mac__register, struct devnames *, dnp, (mac_impl_t *), mip); /* * Mark the MAC to be ready for open. */ mip->mi_state_flags &= ~MIS_DISABLED; rw_exit(&i_mac_impl_lock); atomic_inc_32(&i_mac_impl_count); cmn_err(CE_NOTE, "!%s registered", mip->mi_name); *mhp = (mac_handle_t)mip; return (0); fail: if (style1_created) ddi_remove_minor_node(mip->mi_dip, mip->mi_name); if (style2_created) ddi_remove_minor_node(mip->mi_dip, driver); mac_addr_factory_fini(mip); /* Clean up registered MAC addresses */ mac_fini_macaddr(mip); /* Clean up registered rings */ mac_free_rings(mip, MAC_RING_TYPE_RX); mac_free_rings(mip, MAC_RING_TYPE_TX); /* Clean up notification thread */ if (mip->mi_notify_thread != NULL) i_mac_notify_exit(mip); if (mip->mi_info.mi_unicst_addr != NULL) { kmem_free(mip->mi_info.mi_unicst_addr, mip->mi_type->mt_addr_length); mip->mi_info.mi_unicst_addr = NULL; } mac_stat_destroy(mip); if (mip->mi_type != NULL) { atomic_dec_32(&mip->mi_type->mt_ref); mip->mi_type = NULL; } if (mip->mi_pdata != NULL) { kmem_free(mip->mi_pdata, mip->mi_pdata_size); mip->mi_pdata = NULL; mip->mi_pdata_size = 0; } if (minor != 0) { ASSERT(minor > MAC_MAX_MINOR); mac_minor_rele(minor); } mac_unregister_priv_prop(mip); kmem_cache_free(i_mac_impl_cachep, mip); return (err); } /* * Unregister from the GLDv3 framework */ int mac_unregister(mac_handle_t mh) { int err; mac_impl_t *mip = (mac_impl_t *)mh; mod_hash_val_t val; mac_margin_req_t *mmr, *nextmmr; /* Fail the unregister if there are any open references to this mac. */ if ((err = mac_disable_nowait(mh)) != 0) return (err); /* * Clean up notification thread and wait for it to exit. */ i_mac_notify_exit(mip); i_mac_perim_enter(mip); /* * There is still resource properties configured over this mac. */ if (mip->mi_resource_props.mrp_mask != 0) mac_fastpath_enable((mac_handle_t)mip); if (mip->mi_minor < MAC_MAX_MINOR + 1) { ddi_remove_minor_node(mip->mi_dip, mip->mi_name); ddi_remove_minor_node(mip->mi_dip, (char *)ddi_driver_name(mip->mi_dip)); } ASSERT(mip->mi_nactiveclients == 0 && !(mip->mi_state_flags & MIS_EXCLUSIVE)); mac_stat_destroy(mip); (void) mod_hash_remove(i_mac_impl_hash, (mod_hash_key_t)mip->mi_name, &val); ASSERT(mip == (mac_impl_t *)val); ASSERT(i_mac_impl_count > 0); atomic_dec_32(&i_mac_impl_count); if (mip->mi_pdata != NULL) kmem_free(mip->mi_pdata, mip->mi_pdata_size); mip->mi_pdata = NULL; mip->mi_pdata_size = 0; /* * Free the list of margin request. */ for (mmr = mip->mi_mmrp; mmr != NULL; mmr = nextmmr) { nextmmr = mmr->mmr_nextp; kmem_free(mmr, sizeof (mac_margin_req_t)); } mip->mi_mmrp = NULL; mip->mi_linkstate = LINK_STATE_UNKNOWN; kmem_free(mip->mi_info.mi_unicst_addr, mip->mi_type->mt_addr_length); mip->mi_info.mi_unicst_addr = NULL; atomic_dec_32(&mip->mi_type->mt_ref); mip->mi_type = NULL; /* * Free the primary MAC address. */ mac_fini_macaddr(mip); /* * free all rings */ mac_free_rings(mip, MAC_RING_TYPE_RX); mac_free_rings(mip, MAC_RING_TYPE_TX); mac_addr_factory_fini(mip); bzero(mip->mi_addr, MAXMACADDRLEN); bzero(mip->mi_dstaddr, MAXMACADDRLEN); /* and the flows */ mac_flow_tab_destroy(mip->mi_flow_tab); mip->mi_flow_tab = NULL; if (mip->mi_minor > MAC_MAX_MINOR) mac_minor_rele(mip->mi_minor); cmn_err(CE_NOTE, "!%s unregistered", mip->mi_name); /* * Reset the perim related fields to default values before * kmem_cache_free */ i_mac_perim_exit(mip); mip->mi_state_flags = 0; mac_unregister_priv_prop(mip); kmem_cache_free(i_mac_impl_cachep, mip); return (0); } /* DATA RECEPTION */ /* * This function is invoked for packets received by the MAC driver in * interrupt context. The ring generation number provided by the driver * is matched with the ring generation number held in MAC. If they do not * match, received packets are considered stale packets coming from an older * assignment of the ring. Drop them. */ void mac_rx_ring(mac_handle_t mh, mac_ring_handle_t mrh, mblk_t *mp_chain, uint64_t mr_gen_num) { mac_ring_t *mr = (mac_ring_t *)mrh; if ((mr != NULL) && (mr->mr_gen_num != mr_gen_num)) { DTRACE_PROBE2(mac__rx__rings__stale__packet, uint64_t, mr->mr_gen_num, uint64_t, mr_gen_num); freemsgchain(mp_chain); return; } mac_rx(mh, (mac_resource_handle_t)mrh, mp_chain); } /* * This function is invoked for each packet received by the underlying * driver. */ void mac_rx(mac_handle_t mh, mac_resource_handle_t mrh, mblk_t *mp_chain) { mac_impl_t *mip = (mac_impl_t *)mh; mac_ring_t *mr = (mac_ring_t *)mrh; mac_soft_ring_set_t *mac_srs; mblk_t *bp = mp_chain; boolean_t hw_classified = B_FALSE; /* * If there are any promiscuous mode callbacks defined for * this MAC, pass them a copy if appropriate. */ if (mip->mi_promisc_list != NULL) mac_promisc_dispatch(mip, mp_chain, NULL); if (mr != NULL) { /* * If the SRS teardown has started, just return. The 'mr' * continues to be valid until the driver unregisters the mac. * Hardware classified packets will not make their way up * beyond this point once the teardown has started. The driver * is never passed a pointer to a flow entry or SRS or any * structure that can be freed much before mac_unregister. */ mutex_enter(&mr->mr_lock); if ((mr->mr_state != MR_INUSE) || (mr->mr_flag & (MR_INCIPIENT | MR_CONDEMNED | MR_QUIESCE))) { mutex_exit(&mr->mr_lock); freemsgchain(mp_chain); return; } if (mr->mr_classify_type == MAC_HW_CLASSIFIER) { hw_classified = B_TRUE; MR_REFHOLD_LOCKED(mr); } mutex_exit(&mr->mr_lock); /* * We check if an SRS is controlling this ring. * If so, we can directly call the srs_lower_proc * routine otherwise we need to go through mac_rx_classify * to reach the right place. */ if (hw_classified) { mac_srs = mr->mr_srs; /* * This is supposed to be the fast path. * All packets received though here were steered by * the hardware classifier, and share the same * MAC header info. */ mac_srs->srs_rx.sr_lower_proc(mh, (mac_resource_handle_t)mac_srs, mp_chain, B_FALSE); MR_REFRELE(mr); return; } /* We'll fall through to software classification */ } else { flow_entry_t *flent; int err; rw_enter(&mip->mi_rw_lock, RW_READER); if (mip->mi_single_active_client != NULL) { flent = mip->mi_single_active_client->mci_flent_list; FLOW_TRY_REFHOLD(flent, err); rw_exit(&mip->mi_rw_lock); if (err == 0) { (flent->fe_cb_fn)(flent->fe_cb_arg1, flent->fe_cb_arg2, mp_chain, B_FALSE); FLOW_REFRELE(flent); return; } } else { rw_exit(&mip->mi_rw_lock); } } if (!FLOW_TAB_EMPTY(mip->mi_flow_tab)) { if ((bp = mac_rx_flow(mh, mrh, bp)) == NULL) return; } freemsgchain(bp); } /* DATA TRANSMISSION */ /* * A driver's notification to resume transmission, in case of a provider * without TX rings. */ void mac_tx_update(mac_handle_t mh) { /* * Walk the list of MAC clients (mac_client_handle) * and update */ i_mac_tx_srs_notify((mac_impl_t *)mh, NULL); } /* * A driver's notification to resume transmission on the specified TX ring. */ void mac_tx_ring_update(mac_handle_t mh, mac_ring_handle_t rh) { i_mac_tx_srs_notify((mac_impl_t *)mh, rh); } /* LINK STATE */ /* * Notify the MAC layer about a link state change */ void mac_link_update(mac_handle_t mh, link_state_t link) { mac_impl_t *mip = (mac_impl_t *)mh; /* * Save the link state. */ mip->mi_linkstate = link; /* * Send a MAC_NOTE_LINK notification. */ i_mac_notify(mip, MAC_NOTE_LINK); } /* OTHER CONTROL INFORMATION */ /* * A driver notified us that its primary MAC address has changed. */ void mac_unicst_update(mac_handle_t mh, const uint8_t *addr) { mac_impl_t *mip = (mac_impl_t *)mh; if (mip->mi_type->mt_addr_length == 0) return; i_mac_perim_enter(mip); /* * If address doesn't change, do nothing. */ if (bcmp(addr, mip->mi_addr, mip->mi_type->mt_addr_length) == 0) { i_mac_perim_exit(mip); return; } /* * Freshen the MAC address value and update all MAC clients that * share this MAC address. */ mac_freshen_macaddr(mac_find_macaddr(mip, mip->mi_addr), (uint8_t *)addr); i_mac_perim_exit(mip); /* * Send a MAC_NOTE_UNICST notification. */ i_mac_notify(mip, MAC_NOTE_UNICST); } /* * The provider's hw resources (e.g. rings grouping) has changed. * Notify the MAC framework to trigger a re-negotiation of the capabilities. */ void mac_resource_update(mac_handle_t mh) { /* * Send a MAC_NOTE_RESOURCE notification. */ i_mac_notify((mac_impl_t *)mh, MAC_NOTE_RESOURCE); } /* * MAC plugin information changed. */ int mac_pdata_update(mac_handle_t mh, void *mac_pdata, size_t dsize) { mac_impl_t *mip = (mac_impl_t *)mh; /* * Verify that the plugin supports MAC plugin data and that the * supplied data is valid. */ if (!(mip->mi_type->mt_ops.mtops_ops & MTOPS_PDATA_VERIFY)) return (EINVAL); if (!mip->mi_type->mt_ops.mtops_pdata_verify(mac_pdata, dsize)) return (EINVAL); if (mip->mi_pdata != NULL) kmem_free(mip->mi_pdata, mip->mi_pdata_size); mip->mi_pdata = kmem_alloc(dsize, KM_SLEEP); bcopy(mac_pdata, mip->mi_pdata, dsize); mip->mi_pdata_size = dsize; /* * Since the MAC plugin data is used to construct MAC headers that * were cached in fast-path headers, we need to flush fast-path * information for links associated with this mac. */ i_mac_notify(mip, MAC_NOTE_FASTPATH_FLUSH); return (0); } /* * Invoked by driver as well as the framework to notify its capability change. */ void mac_capab_update(mac_handle_t mh) { /* Send MAC_NOTE_CAPAB_CHG notification */ i_mac_notify((mac_impl_t *)mh, MAC_NOTE_CAPAB_CHG); } int mac_maxsdu_update(mac_handle_t mh, uint_t sdu_max) { mac_impl_t *mip = (mac_impl_t *)mh; if (sdu_max <= mip->mi_sdu_min) return (EINVAL); mip->mi_sdu_max = sdu_max; /* Send a MAC_NOTE_SDU_SIZE notification. */ i_mac_notify(mip, MAC_NOTE_SDU_SIZE); return (0); } /* PRIVATE FUNCTIONS, FOR INTERNAL USE ONLY */ /* * Updates the mac_impl structure with the current state of the link */ static void i_mac_log_link_state(mac_impl_t *mip) { /* * If no change, then it is not interesting. */ if (mip->mi_lastlinkstate == mip->mi_linkstate) return; switch (mip->mi_linkstate) { case LINK_STATE_UP: if (mip->mi_type->mt_ops.mtops_ops & MTOPS_LINK_DETAILS) { char det[200]; mip->mi_type->mt_ops.mtops_link_details(det, sizeof (det), (mac_handle_t)mip, mip->mi_pdata); cmn_err(CE_NOTE, "!%s link up, %s", mip->mi_name, det); } else { cmn_err(CE_NOTE, "!%s link up", mip->mi_name); } break; case LINK_STATE_DOWN: /* * Only transitions from UP to DOWN are interesting */ if (mip->mi_lastlinkstate != LINK_STATE_UNKNOWN) cmn_err(CE_NOTE, "!%s link down", mip->mi_name); break; case LINK_STATE_UNKNOWN: /* * This case is normally not interesting. */ break; } mip->mi_lastlinkstate = mip->mi_linkstate; } /* * Main routine for the callbacks notifications thread */ static void i_mac_notify_thread(void *arg) { mac_impl_t *mip = arg; callb_cpr_t cprinfo; mac_cb_t *mcb; mac_cb_info_t *mcbi; mac_notify_cb_t *mncb; mcbi = &mip->mi_notify_cb_info; CALLB_CPR_INIT(&cprinfo, mcbi->mcbi_lockp, callb_generic_cpr, "i_mac_notify_thread"); mutex_enter(mcbi->mcbi_lockp); for (;;) { uint32_t bits; uint32_t type; bits = mip->mi_notify_bits; if (bits == 0) { CALLB_CPR_SAFE_BEGIN(&cprinfo); cv_wait(&mcbi->mcbi_cv, mcbi->mcbi_lockp); CALLB_CPR_SAFE_END(&cprinfo, mcbi->mcbi_lockp); continue; } mip->mi_notify_bits = 0; if ((bits & (1 << MAC_NNOTE)) != 0) { /* request to quit */ ASSERT(mip->mi_state_flags & MIS_DISABLED); break; } mutex_exit(mcbi->mcbi_lockp); /* * Log link changes. */ if ((bits & (1 << MAC_NOTE_LINK)) != 0) i_mac_log_link_state(mip); /* * Do notification callbacks for each notification type. */ for (type = 0; type < MAC_NNOTE; type++) { if ((bits & (1 << type)) == 0) { continue; } if (mac_notify_cb_list[type].mac_notify_cb_fn) mac_notify_cb_list[type].mac_notify_cb_fn(mip); /* * Walk the list of notifications. */ MAC_CALLBACK_WALKER_INC(&mip->mi_notify_cb_info); for (mcb = mip->mi_notify_cb_list; mcb != NULL; mcb = mcb->mcb_nextp) { mncb = (mac_notify_cb_t *)mcb->mcb_objp; mncb->mncb_fn(mncb->mncb_arg, type); } MAC_CALLBACK_WALKER_DCR(&mip->mi_notify_cb_info, &mip->mi_notify_cb_list); } mutex_enter(mcbi->mcbi_lockp); } mip->mi_state_flags |= MIS_NOTIFY_DONE; cv_broadcast(&mcbi->mcbi_cv); /* CALLB_CPR_EXIT drops the lock */ CALLB_CPR_EXIT(&cprinfo); thread_exit(); } /* * Signal the i_mac_notify_thread asking it to quit. * Then wait till it is done. */ void i_mac_notify_exit(mac_impl_t *mip) { mac_cb_info_t *mcbi; mcbi = &mip->mi_notify_cb_info; mutex_enter(mcbi->mcbi_lockp); mip->mi_notify_bits = (1 << MAC_NNOTE); cv_broadcast(&mcbi->mcbi_cv); while ((mip->mi_notify_thread != NULL) && !(mip->mi_state_flags & MIS_NOTIFY_DONE)) { cv_wait(&mcbi->mcbi_cv, mcbi->mcbi_lockp); } /* Necessary clean up before doing kmem_cache_free */ mip->mi_state_flags &= ~MIS_NOTIFY_DONE; mip->mi_notify_bits = 0; mip->mi_notify_thread = NULL; mutex_exit(mcbi->mcbi_lockp); } /* * Entry point invoked by drivers to dynamically add a ring to an * existing group. */ int mac_group_add_ring(mac_group_handle_t gh, int index) { mac_group_t *group = (mac_group_t *)gh; mac_impl_t *mip = (mac_impl_t *)group->mrg_mh; int ret; i_mac_perim_enter(mip); /* * Only RX rings can be added or removed by drivers currently. */ ASSERT(group->mrg_type == MAC_RING_TYPE_RX); ret = i_mac_group_add_ring(group, NULL, index); i_mac_perim_exit(mip); return (ret); } /* * Entry point invoked by drivers to dynamically remove a ring * from an existing group. The specified ring handle must no longer * be used by the driver after a call to this function. */ void mac_group_rem_ring(mac_group_handle_t gh, mac_ring_handle_t rh) { mac_group_t *group = (mac_group_t *)gh; mac_impl_t *mip = (mac_impl_t *)group->mrg_mh; i_mac_perim_enter(mip); /* * Only RX rings can be added or removed by drivers currently. */ ASSERT(group->mrg_type == MAC_RING_TYPE_RX); i_mac_group_rem_ring(group, (mac_ring_t *)rh, B_TRUE); i_mac_perim_exit(mip); }