/* * 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) 2008, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2019 Joyent, Inc. * Copyright 2017 OmniTI Computer Consulting, Inc. All rights reserved. * Copyright 2020 RackTop Systems, Inc. * Copyright 2023 Oxide Computer Company */ #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 #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 *); static const mac_notify_default_cb_fn_t mac_notify_cb_list[MAC_NNOTE] = { mac_fanout_recompute, /* MAC_NOTE_LINK */ NULL, /* MAC_NOTE_UNICST */ NULL, /* MAC_NOTE_TX */ 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_NOTE_LOWLINK */ }; /* * 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)); } /* * Convert a MAC's offload features into the equivalent DB_CKSUMFLAGS * value. */ static uint16_t mac_features_to_flags(mac_handle_t mh) { uint16_t flags = 0; uint32_t cap_sum = 0; mac_capab_lso_t cap_lso; if (mac_capab_get(mh, MAC_CAPAB_HCKSUM, &cap_sum)) { if (cap_sum & HCKSUM_IPHDRCKSUM) flags |= HCK_IPV4_HDRCKSUM; if (cap_sum & HCKSUM_INET_PARTIAL) flags |= HCK_PARTIALCKSUM; else if (cap_sum & (HCKSUM_INET_FULL_V4 | HCKSUM_INET_FULL_V6)) flags |= HCK_FULLCKSUM; } /* * We don't need the information stored in 'cap_lso', but we * need to pass a non-NULL pointer to appease the driver. */ if (mac_capab_get(mh, MAC_CAPAB_LSO, &cap_lso)) flags |= HW_LSO; return (flags); } /* * 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; /* A successful call to mac_init_ops() sets the DN_GLDV3_DRIVER flag. */ if (!GLDV3_DRV(ddi_driver_major(mregp->m_dip))) return (EINVAL); /* 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; /* Set the default IEEE Port VLAN Identifier */ mip->mi_pvid = 1; /* Default bridge link learning protection values */ mip->mi_llimit = 1000; mip->mi_ldecay = 200; 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; if (mregp->m_multicast_sdu == 0) mregp->m_multicast_sdu = mregp->m_max_sdu; if (mregp->m_multicast_sdu < mregp->m_min_sdu || mregp->m_multicast_sdu > mregp->m_max_sdu) goto fail; mip->mi_sdu_min = mregp->m_min_sdu; mip->mi_sdu_max = mregp->m_max_sdu; mip->mi_sdu_multicast = mregp->m_multicast_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); mip->mi_dstaddr_set = B_TRUE; } } 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 (mip->mi_type->mt_ops.mtops_ops & MTOPS_PDATA_VERIFY) { /* * Verify if the supplied plugin data is valid. Note that * even if the caller passed in a NULL pointer as plugin data, * we still need to verify if that's valid as the plugin may * require plugin data to function. */ if (!mip->mi_type->mt_ops.mtops_pdata_verify(mregp->m_pdata, mregp->m_pdata_size)) { goto fail; } if (mregp->m_pdata != NULL) { 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; } } else if (mregp->m_pdata != NULL) { /* * The caller supplied non-NULL plugin data, but the plugin * does not recognize plugin data. */ err = EINVAL; goto fail; } /* * Register the private properties. */ mac_register_priv_prop(mip, mregp->m_priv_props); /* * 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), mip->mi_minor); } /* * 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); /* * Cache the DB_CKSUMFLAGS that this MAC supports. */ mip->mi_tx_cksum_flags = mac_features_to_flags((mac_handle_t)mip); /* * Initialize the capabilities */ bzero(&mip->mi_rx_rings_cap, sizeof (mac_capab_rings_t)); bzero(&mip->mi_tx_rings_cap, sizeof (mac_capab_rings_t)); 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; if (i_mac_capab_get((mac_handle_t)mip, MAC_CAPAB_OVERLAY, NULL)) mip->mi_state_flags |= MIS_IS_OVERLAY; mac_addr_factory_init(mip); mac_transceiver_init(mip); mac_led_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; } /* * 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_driver_stat_create(mip); /* Zero out any properties. */ bzero(&mip->mi_resource_props, sizeof (mac_resource_props_t)); if (mip->mi_minor <= MAC_MAX_MINOR) { /* 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_driver_stat_delete(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); } mip->mi_state_flags = 0; mac_unregister_priv_prop(mip); /* * Clear the state before destroying the mac_impl_t */ mip->mi_state_flags = 0; 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); /* * Prior to acquiring the MAC perimeter, remove the MAC instance from * the internal hash table. Such removal means table-walkers that * acquire the perimeter will not do so on behalf of what we are * unregistering, which prevents a deadlock. */ rw_enter(&i_mac_impl_lock, RW_WRITER); (void) mod_hash_remove(i_mac_impl_hash, (mod_hash_key_t)mip->mi_name, &val); rw_exit(&i_mac_impl_lock); ASSERT(mip == (mac_impl_t *)val); 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_driver_stat_delete(mip); 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 = mip->mi_lowlinkstate = 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); mip->mi_dstaddr_set = B_FALSE; /* 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); ASSERT(mip->mi_bridge_link == NULL); 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; /* * Check if the link is part of a bridge. If not, then we don't need * to take the lock to remain consistent. Make this common case * lock-free and tail-call optimized. */ if (mip->mi_bridge_link == NULL) { mac_rx_common(mh, mrh, mp_chain); } else { /* * Once we take a reference on the bridge link, the bridge * module itself can't unload, so the callback pointers are * stable. */ mutex_enter(&mip->mi_bridge_lock); if ((mh = mip->mi_bridge_link) != NULL) mac_bridge_ref_cb(mh, B_TRUE); mutex_exit(&mip->mi_bridge_lock); if (mh == NULL) { mac_rx_common((mac_handle_t)mip, mrh, mp_chain); } else { mac_bridge_rx_cb(mh, mrh, mp_chain); mac_bridge_ref_cb(mh, B_FALSE); } } } /* * Special case function: this allows snooping of packets transmitted and * received by TRILL. By design, they go directly into the TRILL module. */ void mac_trill_snoop(mac_handle_t mh, mblk_t *mp) { mac_impl_t *mip = (mac_impl_t *)mh; if (mip->mi_promisc_list != NULL) mac_promisc_dispatch(mip, mp, NULL, B_FALSE); } /* * This is the upward reentry point for packets arriving from the bridging * module and from mac_rx for links not part of a bridge. */ void mac_rx_common(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; /* * 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, B_FALSE); 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; } /* * The ring is in passthru mode; pass the chain up to * the pseudo ring. */ if (mr->mr_classify_type == MAC_PASSTHRU_CLASSIFIER) { MR_REFHOLD_LOCKED(mr); mutex_exit(&mr->mr_lock); mr->mr_pt_fn(mr->mr_pt_arg1, mr->mr_pt_arg2, mp_chain, B_FALSE); MR_REFRELE(mr); return; } /* * The passthru callback should only be set when in * MAC_PASSTHRU_CLASSIFIER mode. */ ASSERT3P(mr->mr_pt_fn, ==, NULL); /* * 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 (mr->mr_classify_type == MAC_HW_CLASSIFIER) { MR_REFHOLD_LOCKED(mr); mutex_exit(&mr->mr_lock); ASSERT3P(mr->mr_srs, !=, NULL); mac_srs = mr->mr_srs; /* * This is the fast path. All packets received * on this ring are hardware classified 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; } mutex_exit(&mr->mr_lock); /* 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) { mac_tx_ring_update(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_lowlinkstate = link; /* * Send a MAC_NOTE_LOWLINK notification. This tells the notification * thread to deliver both lower and upper notifications. */ i_mac_notify(mip, MAC_NOTE_LOWLINK); } /* * Notify the MAC layer about a link state change due to bridging. */ void mac_link_redo(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. Only upper notifications are * made. */ i_mac_notify(mip, MAC_NOTE_LINK); } /* MINOR NODE HANDLING */ /* * Given a dev_t, return the instance number (PPA) associated with it. * Drivers can use this in their getinfo(9e) implementation to lookup * the instance number (i.e. PPA) of the device, to use as an index to * their own array of soft state structures. * * Returns -1 on error. */ int mac_devt_to_instance(dev_t devt) { return (dld_devt_to_instance(devt)); } /* * Drivers that make use of the private minor number space are expected to * provide their own getinfo(9e) entry point. This function simply forwards * to the default MAC framework getinfo(9e) implementation as a convenience * if they don't need any special mapping (mac instance != ddi_get_instance()) */ int mac_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **resp) { return (dld_getinfo(dip, cmd, arg, resp)); } /* * This function returns the first minor number that is available for * driver private use. All minor numbers smaller than this are * reserved for GLDv3 use. */ minor_t mac_private_minor(void) { return (MAC_PRIVATE_MINOR); } /* 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 changes, freshen the MAC address value and update * all MAC clients that share this MAC address. */ if (bcmp(addr, mip->mi_addr, mip->mi_type->mt_addr_length) != 0) { 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); } void mac_dst_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); bcopy(addr, mip->mi_dstaddr, mip->mi_type->mt_addr_length); i_mac_perim_exit(mip); i_mac_notify(mip, MAC_NOTE_DEST); } /* * 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); } /* * The mac provider or mac frameowrk calls this function when it wants * to notify upstream consumers that the capabilities have changed and * that they should modify their own internal state accordingly. * * We currently have no regard for the fact that a provider could * decide to drop capabilities which would invalidate pending traffic. * For example, if one was to disable the Tx checksum offload while * TCP/IP traffic was being sent by mac clients relying on that * feature, then those packets would hit the write with missing or * partial checksums. A proper solution involves not only providing * notfication, but also performing client quiescing. That is, a capab * change should be treated as an atomic transaction that forms a * barrier between traffic relying on the current capabs and traffic * relying on the new capabs. In practice, simnet is currently the * only provider that could hit this, and it's an easily avoidable * situation (and at worst it should only lead to some dropped * packets). But if we ever want better on-the-fly capab change to * actual hardware providers, then we should give this update * mechanism a proper implementation. */ void mac_capab_update(mac_handle_t mh) { /* * Send a MAC_NOTE_CAPAB_CHG notification to alert upstream * clients to renegotiate capabilities. */ i_mac_notify((mac_impl_t *)mh, MAC_NOTE_CAPAB_CHG); } /* * Used by normal drivers to update the max sdu size. * We need to handle the case of a smaller mi_sdu_multicast * since this is called by mac_set_mtu() even for drivers that * have differing unicast and multicast mtu and we don't want to * increase the multicast mtu by accident in that case. */ int mac_maxsdu_update(mac_handle_t mh, uint_t sdu_max) { mac_impl_t *mip = (mac_impl_t *)mh; if (sdu_max == 0 || sdu_max < mip->mi_sdu_min) return (EINVAL); mip->mi_sdu_max = sdu_max; if (mip->mi_sdu_multicast > mip->mi_sdu_max) mip->mi_sdu_multicast = mip->mi_sdu_max; /* Send a MAC_NOTE_SDU_SIZE notification. */ i_mac_notify(mip, MAC_NOTE_SDU_SIZE); return (0); } /* * Version of the above function that is used by drivers that have a different * max sdu size for multicast/broadcast vs. unicast. */ int mac_maxsdu_update2(mac_handle_t mh, uint_t sdu_max, uint_t sdu_multicast) { mac_impl_t *mip = (mac_impl_t *)mh; if (sdu_max == 0 || sdu_max < mip->mi_sdu_min) return (EINVAL); if (sdu_multicast == 0) sdu_multicast = sdu_max; if (sdu_multicast > sdu_max || sdu_multicast < mip->mi_sdu_min) return (EINVAL); mip->mi_sdu_max = sdu_max; mip->mi_sdu_multicast = sdu_multicast; /* Send a MAC_NOTE_SDU_SIZE notification. */ i_mac_notify(mip, MAC_NOTE_SDU_SIZE); return (0); } static void mac_ring_intr_retarget(mac_group_t *group, mac_ring_t *ring) { mac_client_impl_t *mcip; flow_entry_t *flent; mac_soft_ring_set_t *mac_rx_srs; mac_cpus_t *srs_cpu; int i; if (((mcip = MAC_GROUP_ONLY_CLIENT(group)) != NULL) && (!ring->mr_info.mri_intr.mi_ddi_shared)) { /* interrupt can be re-targeted */ ASSERT(group->mrg_state == MAC_GROUP_STATE_RESERVED); flent = mcip->mci_flent; if (ring->mr_type == MAC_RING_TYPE_RX) { for (i = 0; i < flent->fe_rx_srs_cnt; i++) { mac_rx_srs = flent->fe_rx_srs[i]; if (mac_rx_srs->srs_ring != ring) continue; srs_cpu = &mac_rx_srs->srs_cpu; mutex_enter(&cpu_lock); mac_rx_srs_retarget_intr(mac_rx_srs, srs_cpu->mc_rx_intr_cpu); mutex_exit(&cpu_lock); break; } } else { if (flent->fe_tx_srs != NULL) { mutex_enter(&cpu_lock); mac_tx_srs_retarget_intr( flent->fe_tx_srs); mutex_exit(&cpu_lock); } } } } /* * Clients like aggr create pseudo rings (mac_ring_t) and expose them to * their clients. There is a 1-1 mapping pseudo ring and the hardware * ring. ddi interrupt handles are exported from the hardware ring to * the pseudo ring. Thus when the interrupt handle changes, clients of * aggr that are using the handle need to use the new handle and * re-target their interrupts. */ static void mac_pseudo_ring_intr_retarget(mac_impl_t *mip, mac_ring_t *ring, ddi_intr_handle_t ddh) { mac_ring_t *pring; mac_group_t *pgroup; mac_impl_t *pmip; char macname[MAXNAMELEN]; mac_perim_handle_t p_mph; uint64_t saved_gen_num; again: pring = (mac_ring_t *)ring->mr_prh; pgroup = (mac_group_t *)pring->mr_gh; pmip = (mac_impl_t *)pgroup->mrg_mh; saved_gen_num = ring->mr_gen_num; (void) strlcpy(macname, pmip->mi_name, MAXNAMELEN); /* * We need to enter aggr's perimeter. The locking hierarchy * dictates that aggr's perimeter should be entered first * and then the port's perimeter. So drop the port's * perimeter, enter aggr's and then re-enter port's * perimeter. */ i_mac_perim_exit(mip); /* * While we know pmip is the aggr's mip, there is a * possibility that aggr could have unregistered by * the time we exit port's perimeter (mip) and * enter aggr's perimeter (pmip). To avoid that * scenario, enter aggr's perimeter using its name. */ if (mac_perim_enter_by_macname(macname, &p_mph) != 0) return; i_mac_perim_enter(mip); /* * Check if the ring got assigned to another aggregation before * be could enter aggr's and the port's perimeter. When a ring * gets deleted from an aggregation, it calls mac_stop_ring() * which increments the generation number. So checking * generation number will be enough. */ if (ring->mr_gen_num != saved_gen_num && ring->mr_prh != NULL) { i_mac_perim_exit(mip); mac_perim_exit(p_mph); i_mac_perim_enter(mip); goto again; } /* Check if pseudo ring is still present */ if (ring->mr_prh != NULL) { pring->mr_info.mri_intr.mi_ddi_handle = ddh; pring->mr_info.mri_intr.mi_ddi_shared = ring->mr_info.mri_intr.mi_ddi_shared; if (ddh != NULL) mac_ring_intr_retarget(pgroup, pring); } i_mac_perim_exit(mip); mac_perim_exit(p_mph); } /* * API called by driver to provide new interrupt handle for TX/RX rings. * This usually happens when IRM (Interrupt Resource Manangement) * framework either gives the driver more MSI-x interrupts or takes * away MSI-x interrupts from the driver. */ void mac_ring_intr_set(mac_ring_handle_t mrh, ddi_intr_handle_t ddh) { mac_ring_t *ring = (mac_ring_t *)mrh; mac_group_t *group = (mac_group_t *)ring->mr_gh; mac_impl_t *mip = (mac_impl_t *)group->mrg_mh; i_mac_perim_enter(mip); ring->mr_info.mri_intr.mi_ddi_handle = ddh; if (ddh == NULL) { /* Interrupts being reset */ ring->mr_info.mri_intr.mi_ddi_shared = B_FALSE; if (ring->mr_prh != NULL) { mac_pseudo_ring_intr_retarget(mip, ring, ddh); return; } } else { /* New interrupt handle */ mac_compare_ddi_handle(mip->mi_rx_groups, mip->mi_rx_group_count, ring); if (!ring->mr_info.mri_intr.mi_ddi_shared) { mac_compare_ddi_handle(mip->mi_tx_groups, mip->mi_tx_group_count, ring); } if (ring->mr_prh != NULL) { mac_pseudo_ring_intr_retarget(mip, ring, ddh); return; } else { mac_ring_intr_retarget(group, ring); } } i_mac_perim_exit(mip); } /* 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_lastlowlinkstate == mip->mi_lowlinkstate) return; switch (mip->mi_lowlinkstate) { 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_lastlowlinkstate != 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_lastlowlinkstate = mip->mi_lowlinkstate; } /* * 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 on the actual link, but then do reports on * synthetic state (if part of a bridge). */ if ((bits & (1 << MAC_NOTE_LOWLINK)) != 0) { link_state_t newstate; mac_handle_t mh; i_mac_log_link_state(mip); newstate = mip->mi_lowlinkstate; if (mip->mi_bridge_link != NULL) { mutex_enter(&mip->mi_bridge_lock); if ((mh = mip->mi_bridge_link) != NULL) { newstate = mac_bridge_ls_cb(mh, newstate); } mutex_exit(&mip->mi_bridge_lock); } if (newstate != mip->mi_linkstate) { mip->mi_linkstate = newstate; bits |= 1 << MAC_NOTE_LINK; } } /* * Depending on which capabs have changed, the Tx * checksum flags may also need to be updated. */ if ((bits & (1 << MAC_NOTE_CAPAB_CHG)) != 0) { mac_perim_handle_t mph; mac_handle_t mh = (mac_handle_t)mip; mac_perim_enter_by_mh(mh, &mph); mip->mi_tx_cksum_flags = mac_features_to_flags(mh); mac_perim_exit(mph); } /* * 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] != NULL) (*mac_notify_cb_list[type])(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); 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); i_mac_group_rem_ring(group, (mac_ring_t *)rh, B_TRUE); i_mac_perim_exit(mip); } /* * mac_prop_info_*() callbacks called from the driver's prefix_propinfo() * entry points. */ void mac_prop_info_set_default_uint8(mac_prop_info_handle_t ph, uint8_t val) { mac_prop_info_state_t *pr = (mac_prop_info_state_t *)ph; /* nothing to do if the caller doesn't want the default value */ if (pr->pr_default == NULL) return; ASSERT(pr->pr_default_size >= sizeof (uint8_t)); *(uint8_t *)(pr->pr_default) = val; pr->pr_flags |= MAC_PROP_INFO_DEFAULT; } void mac_prop_info_set_default_uint64(mac_prop_info_handle_t ph, uint64_t val) { mac_prop_info_state_t *pr = (mac_prop_info_state_t *)ph; /* nothing to do if the caller doesn't want the default value */ if (pr->pr_default == NULL) return; ASSERT(pr->pr_default_size >= sizeof (uint64_t)); bcopy(&val, pr->pr_default, sizeof (val)); pr->pr_flags |= MAC_PROP_INFO_DEFAULT; } void mac_prop_info_set_default_uint32(mac_prop_info_handle_t ph, uint32_t val) { mac_prop_info_state_t *pr = (mac_prop_info_state_t *)ph; /* nothing to do if the caller doesn't want the default value */ if (pr->pr_default == NULL) return; ASSERT(pr->pr_default_size >= sizeof (uint32_t)); bcopy(&val, pr->pr_default, sizeof (val)); pr->pr_flags |= MAC_PROP_INFO_DEFAULT; } void mac_prop_info_set_default_str(mac_prop_info_handle_t ph, const char *str) { mac_prop_info_state_t *pr = (mac_prop_info_state_t *)ph; /* nothing to do if the caller doesn't want the default value */ if (pr->pr_default == NULL) return; if (strlen(str) >= pr->pr_default_size) pr->pr_errno = ENOBUFS; else (void) strlcpy(pr->pr_default, str, pr->pr_default_size); pr->pr_flags |= MAC_PROP_INFO_DEFAULT; } void mac_prop_info_set_default_link_flowctrl(mac_prop_info_handle_t ph, link_flowctrl_t val) { mac_prop_info_state_t *pr = (mac_prop_info_state_t *)ph; /* nothing to do if the caller doesn't want the default value */ if (pr->pr_default == NULL) return; ASSERT(pr->pr_default_size >= sizeof (link_flowctrl_t)); bcopy(&val, pr->pr_default, sizeof (val)); pr->pr_flags |= MAC_PROP_INFO_DEFAULT; } void mac_prop_info_set_default_fec(mac_prop_info_handle_t ph, link_fec_t val) { mac_prop_info_state_t *pr = (mac_prop_info_state_t *)ph; /* nothing to do if the caller doesn't want the default value */ if (pr->pr_default == NULL) return; ASSERT(pr->pr_default_size >= sizeof (link_fec_t)); bcopy(&val, pr->pr_default, sizeof (val)); pr->pr_flags |= MAC_PROP_INFO_DEFAULT; } void mac_prop_info_set_range_uint32(mac_prop_info_handle_t ph, uint32_t min, uint32_t max) { mac_prop_info_state_t *pr = (mac_prop_info_state_t *)ph; mac_propval_range_t *range = pr->pr_range; mac_propval_uint32_range_t *range32; /* nothing to do if the caller doesn't want the range info */ if (range == NULL) return; if (pr->pr_range_cur_count++ == 0) { /* first range */ pr->pr_flags |= MAC_PROP_INFO_RANGE; range->mpr_type = MAC_PROPVAL_UINT32; } else { /* all ranges of a property should be of the same type */ ASSERT(range->mpr_type == MAC_PROPVAL_UINT32); if (pr->pr_range_cur_count > range->mpr_count) { pr->pr_errno = ENOSPC; return; } } range32 = range->mpr_range_uint32; range32[pr->pr_range_cur_count - 1].mpur_min = min; range32[pr->pr_range_cur_count - 1].mpur_max = max; } void mac_prop_info_set_perm(mac_prop_info_handle_t ph, uint8_t perm) { mac_prop_info_state_t *pr = (mac_prop_info_state_t *)ph; pr->pr_perm = perm; pr->pr_flags |= MAC_PROP_INFO_PERM; } void mac_hcksum_get(const mblk_t *mp, uint32_t *start, uint32_t *stuff, uint32_t *end, uint32_t *value, uint32_t *flags_ptr) { uint32_t flags; ASSERT(DB_TYPE(mp) == M_DATA); flags = DB_CKSUMFLAGS(mp) & HCK_FLAGS; if ((flags & (HCK_PARTIALCKSUM | HCK_FULLCKSUM)) != 0) { if (value != NULL) *value = (uint32_t)DB_CKSUM16(mp); if ((flags & HCK_PARTIALCKSUM) != 0) { if (start != NULL) *start = (uint32_t)DB_CKSUMSTART(mp); if (stuff != NULL) *stuff = (uint32_t)DB_CKSUMSTUFF(mp); if (end != NULL) *end = (uint32_t)DB_CKSUMEND(mp); } } if (flags_ptr != NULL) *flags_ptr = flags; } void mac_hcksum_set(mblk_t *mp, uint32_t start, uint32_t stuff, uint32_t end, uint32_t value, uint32_t flags) { ASSERT(DB_TYPE(mp) == M_DATA); DB_CKSUMSTART(mp) = (intptr_t)start; DB_CKSUMSTUFF(mp) = (intptr_t)stuff; DB_CKSUMEND(mp) = (intptr_t)end; DB_CKSUMFLAGS(mp) = (uint16_t)flags; DB_CKSUM16(mp) = (uint16_t)value; } void mac_hcksum_clone(const mblk_t *src, mblk_t *dst) { ASSERT3U(DB_TYPE(src), ==, M_DATA); ASSERT3U(DB_TYPE(dst), ==, M_DATA); /* * Do these assignments unconditionally, rather than only when * flags is non-zero. This protects a situation where zeroed * hcksum data does not make the jump onto an mblk_t with * stale data in those fields. It's important to copy all * possible flags (HCK_* as well as HW_*) and not just the * checksum specific flags. Dropping flags during a clone * could result in dropped packets. If the caller has good * reason to drop those flags then it should do it manually, * after the clone. */ DB_CKSUMFLAGS(dst) = DB_CKSUMFLAGS(src); DB_CKSUMSTART(dst) = DB_CKSUMSTART(src); DB_CKSUMSTUFF(dst) = DB_CKSUMSTUFF(src); DB_CKSUMEND(dst) = DB_CKSUMEND(src); DB_CKSUM16(dst) = DB_CKSUM16(src); DB_LSOMSS(dst) = DB_LSOMSS(src); } void mac_lso_get(mblk_t *mp, uint32_t *mss, uint32_t *flags) { ASSERT(DB_TYPE(mp) == M_DATA); if (flags != NULL) { *flags = DB_CKSUMFLAGS(mp) & HW_LSO; if ((*flags != 0) && (mss != NULL)) *mss = (uint32_t)DB_LSOMSS(mp); } } void mac_transceiver_info_set_present(mac_transceiver_info_t *infop, boolean_t present) { infop->mti_present = present; } void mac_transceiver_info_set_usable(mac_transceiver_info_t *infop, boolean_t usable) { infop->mti_usable = usable; } /* * We should really keep track of our offset and not walk everything every * time. I can't imagine that this will be kind to us at high packet rates; * however, for the moment, let's leave that. * * This walks a message block chain without pulling up to fill in the context * information. Note that the data we care about could be hidden across more * than one mblk_t. */ static int mac_meoi_get_uint8(mblk_t *mp, off_t off, uint8_t *out) { size_t mpsize; uint8_t *bp; mpsize = msgsize(mp); /* Check for overflow */ if (off + sizeof (uint16_t) > mpsize) return (-1); mpsize = MBLKL(mp); while (off >= mpsize) { mp = mp->b_cont; off -= mpsize; mpsize = MBLKL(mp); } bp = mp->b_rptr + off; *out = *bp; return (0); } static int mac_meoi_get_uint16(mblk_t *mp, off_t off, uint16_t *out) { size_t mpsize; uint8_t *bp; mpsize = msgsize(mp); /* Check for overflow */ if (off + sizeof (uint16_t) > mpsize) return (-1); mpsize = MBLKL(mp); while (off >= mpsize) { mp = mp->b_cont; off -= mpsize; mpsize = MBLKL(mp); } /* * Data is in network order. Note the second byte of data might be in * the next mp. */ bp = mp->b_rptr + off; *out = *bp << 8; if (off + 1 == mpsize) { mp = mp->b_cont; bp = mp->b_rptr; } else { bp++; } *out |= *bp; return (0); } int mac_ether_offload_info(mblk_t *mp, mac_ether_offload_info_t *meoi) { size_t off; uint16_t ether; uint8_t ipproto, iplen, l4len, maclen; bzero(meoi, sizeof (mac_ether_offload_info_t)); meoi->meoi_len = msgsize(mp); off = offsetof(struct ether_header, ether_type); if (mac_meoi_get_uint16(mp, off, ðer) != 0) return (-1); if (ether == ETHERTYPE_VLAN) { off = offsetof(struct ether_vlan_header, ether_type); if (mac_meoi_get_uint16(mp, off, ðer) != 0) return (-1); meoi->meoi_flags |= MEOI_VLAN_TAGGED; maclen = sizeof (struct ether_vlan_header); } else { maclen = sizeof (struct ether_header); } meoi->meoi_flags |= MEOI_L2INFO_SET; meoi->meoi_l2hlen = maclen; meoi->meoi_l3proto = ether; switch (ether) { case ETHERTYPE_IP: /* * For IPv4 we need to get the length of the header, as it can * be variable. */ off = offsetof(ipha_t, ipha_version_and_hdr_length) + maclen; if (mac_meoi_get_uint8(mp, off, &iplen) != 0) return (-1); iplen &= 0x0f; if (iplen < 5 || iplen > 0x0f) return (-1); iplen *= 4; off = offsetof(ipha_t, ipha_protocol) + maclen; if (mac_meoi_get_uint8(mp, off, &ipproto) == -1) return (-1); break; case ETHERTYPE_IPV6: iplen = 40; off = offsetof(ip6_t, ip6_nxt) + maclen; if (mac_meoi_get_uint8(mp, off, &ipproto) == -1) return (-1); break; default: return (0); } meoi->meoi_l3hlen = iplen; meoi->meoi_l4proto = ipproto; meoi->meoi_flags |= MEOI_L3INFO_SET; switch (ipproto) { case IPPROTO_TCP: off = offsetof(tcph_t, th_offset_and_rsrvd) + maclen + iplen; if (mac_meoi_get_uint8(mp, off, &l4len) == -1) return (-1); l4len = (l4len & 0xf0) >> 4; if (l4len < 5 || l4len > 0xf) return (-1); l4len *= 4; break; case IPPROTO_UDP: l4len = sizeof (struct udphdr); break; case IPPROTO_SCTP: l4len = sizeof (sctp_hdr_t); break; default: return (0); } meoi->meoi_l4hlen = l4len; meoi->meoi_flags |= MEOI_L4INFO_SET; return (0); }