/* * 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 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" #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 /* * Implementation of the mac functionality for vnet using the * generic(default) transport layer of sun4v Logical Domain Channels(LDC). */ /* * Function prototypes. */ /* vgen proxy entry points */ int vgen_init(void *vnetp, dev_info_t *vnetdip, const uint8_t *macaddr, mac_register_t **vgenmacp); int vgen_uninit(void *arg); static int vgen_start(void *arg); static void vgen_stop(void *arg); static mblk_t *vgen_tx(void *arg, mblk_t *mp); static int vgen_multicst(void *arg, boolean_t add, const uint8_t *mca); static int vgen_promisc(void *arg, boolean_t on); static int vgen_unicst(void *arg, const uint8_t *mca); static int vgen_stat(void *arg, uint_t stat, uint64_t *val); static void vgen_ioctl(void *arg, queue_t *wq, mblk_t *mp); /* externs - functions provided by vnet to add/remove/modify entries in fdb */ void vnet_add_fdb(void *arg, uint8_t *macaddr, mac_tx_t m_tx, void *txarg); void vnet_del_fdb(void *arg, uint8_t *macaddr); void vnet_modify_fdb(void *arg, uint8_t *macaddr, mac_tx_t m_tx, void *txarg, boolean_t upgrade); void vnet_add_def_rte(void *arg, mac_tx_t m_tx, void *txarg); void vnet_del_def_rte(void *arg); void vnet_rx(void *arg, mac_resource_handle_t mrh, mblk_t *mp); void vnet_tx_update(void *arg); /* vgen internal functions */ static void vgen_detach_ports(vgen_t *vgenp); static void vgen_port_detach(vgen_port_t *portp); static void vgen_port_list_insert(vgen_port_t *portp); static void vgen_port_list_remove(vgen_port_t *portp); static vgen_port_t *vgen_port_lookup(vgen_portlist_t *plistp, int port_num); static int vgen_mdeg_reg(vgen_t *vgenp); static void vgen_mdeg_unreg(vgen_t *vgenp); static int vgen_mdeg_cb(void *cb_argp, mdeg_result_t *resp); static int vgen_add_port(vgen_t *vgenp, md_t *mdp, mde_cookie_t mdex); static int vgen_remove_port(vgen_t *vgenp, md_t *mdp, mde_cookie_t mdex); static int vgen_port_attach_mdeg(vgen_t *vgenp, int port_num, uint64_t *ldcids, int num_ids, struct ether_addr *macaddr, boolean_t vsw_port); static void vgen_port_detach_mdeg(vgen_port_t *portp); static int vgen_update_port(vgen_t *vgenp, md_t *curr_mdp, mde_cookie_t curr_mdex, md_t *prev_mdp, mde_cookie_t prev_mdex); static uint64_t vgen_port_stat(vgen_port_t *portp, uint_t stat); static int vgen_ldc_attach(vgen_port_t *portp, uint64_t ldc_id); static void vgen_ldc_detach(vgen_ldc_t *ldcp); static int vgen_alloc_tx_ring(vgen_ldc_t *ldcp); static void vgen_free_tx_ring(vgen_ldc_t *ldcp); static void vgen_init_ports(vgen_t *vgenp); static void vgen_port_init(vgen_port_t *portp); static void vgen_uninit_ports(vgen_t *vgenp); static void vgen_port_uninit(vgen_port_t *portp); static void vgen_init_ldcs(vgen_port_t *portp); static void vgen_uninit_ldcs(vgen_port_t *portp); static int vgen_ldc_init(vgen_ldc_t *ldcp); static void vgen_ldc_uninit(vgen_ldc_t *ldcp); static int vgen_init_tbufs(vgen_ldc_t *ldcp); static void vgen_uninit_tbufs(vgen_ldc_t *ldcp); static void vgen_clobber_tbufs(vgen_ldc_t *ldcp); static void vgen_clobber_rxds(vgen_ldc_t *ldcp); static uint64_t vgen_ldc_stat(vgen_ldc_t *ldcp, uint_t stat); static uint_t vgen_ldc_cb(uint64_t event, caddr_t arg); static int vgen_portsend(vgen_port_t *portp, mblk_t *mp); static int vgen_ldcsend(vgen_ldc_t *ldcp, mblk_t *mp); static void vgen_reclaim(vgen_ldc_t *ldcp); static void vgen_reclaim_dring(vgen_ldc_t *ldcp); static int vgen_num_txpending(vgen_ldc_t *ldcp); static int vgen_tx_dring_full(vgen_ldc_t *ldcp); static int vgen_ldc_txtimeout(vgen_ldc_t *ldcp); static void vgen_ldc_watchdog(void *arg); /* vgen handshake functions */ static vgen_ldc_t *vh_nextphase(vgen_ldc_t *ldcp); static int vgen_supported_version(vgen_ldc_t *ldcp, uint16_t ver_major, uint16_t ver_minor); static int vgen_next_version(vgen_ldc_t *ldcp, vgen_ver_t *verp); static int vgen_sendmsg(vgen_ldc_t *ldcp, caddr_t msg, size_t msglen, boolean_t caller_holds_lock); static int vgen_send_version_negotiate(vgen_ldc_t *ldcp); static int vgen_send_attr_info(vgen_ldc_t *ldcp); static int vgen_send_dring_reg(vgen_ldc_t *ldcp); static int vgen_send_rdx_info(vgen_ldc_t *ldcp); static int vgen_send_dring_data(vgen_ldc_t *ldcp, uint32_t start, int32_t end); static int vgen_send_mcast_info(vgen_ldc_t *ldcp); static int vgen_handshake_phase2(vgen_ldc_t *ldcp); static void vgen_handshake_reset(vgen_ldc_t *ldcp); static void vgen_reset_hphase(vgen_ldc_t *ldcp); static void vgen_handshake(vgen_ldc_t *ldcp); static int vgen_handshake_done(vgen_ldc_t *ldcp); static void vgen_handshake_retry(vgen_ldc_t *ldcp); static int vgen_handle_version_negotiate(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_handle_attr_info(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_handle_dring_reg(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_handle_rdx_info(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_handle_mcast_info(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_handle_ctrlmsg(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_handle_dring_data(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_handle_dring_data_info(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_process_dring_data(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_handle_dring_data_ack(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_handle_dring_data_nack(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static int vgen_send_dring_ack(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp, uint32_t start, int32_t end, uint8_t pstate); static int vgen_handle_datamsg(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static void vgen_handle_errmsg(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static void vgen_handle_evt_up(vgen_ldc_t *ldcp, boolean_t flag); static void vgen_handle_evt_reset(vgen_ldc_t *ldcp, boolean_t flag); static int vgen_check_sid(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp); static caddr_t vgen_print_ethaddr(uint8_t *a, char *ebuf); static void vgen_hwatchdog(void *arg); static void vgen_print_attr_info(vgen_ldc_t *ldcp, int endpoint); static void vgen_print_hparams(vgen_hparams_t *hp); static void vgen_print_ldcinfo(vgen_ldc_t *ldcp); static uint_t vgen_ldc_rcv_softintr(caddr_t arg1, caddr_t arg2); static void vgen_stop_rcv_thread(vgen_ldc_t *ldcp); static void vgen_ldc_rcv_worker(void *arg); static void vgen_handle_evt_read(vgen_ldc_t *ldcp); static void vgen_ldc_queue_data(vgen_ldc_t *ldcp, mblk_t *rhead, mblk_t *rtail); /* * The handshake process consists of 5 phases defined below, with VH_PHASE0 * being the pre-handshake phase and VH_DONE is the phase to indicate * successful completion of all phases. * Each phase may have one to several handshake states which are required * to complete successfully to move to the next phase. * Refer to the functions vgen_handshake() and vgen_handshake_done() for * more details. */ /* handshake phases */ enum { VH_PHASE0, VH_PHASE1, VH_PHASE2, VH_PHASE3, VH_DONE = 0x80 }; /* handshake states */ enum { VER_INFO_SENT = 0x1, VER_ACK_RCVD = 0x2, VER_INFO_RCVD = 0x4, VER_ACK_SENT = 0x8, VER_NEGOTIATED = (VER_ACK_RCVD | VER_ACK_SENT), ATTR_INFO_SENT = 0x10, ATTR_ACK_RCVD = 0x20, ATTR_INFO_RCVD = 0x40, ATTR_ACK_SENT = 0x80, ATTR_INFO_EXCHANGED = (ATTR_ACK_RCVD | ATTR_ACK_SENT), DRING_INFO_SENT = 0x100, DRING_ACK_RCVD = 0x200, DRING_INFO_RCVD = 0x400, DRING_ACK_SENT = 0x800, DRING_INFO_EXCHANGED = (DRING_ACK_RCVD | DRING_ACK_SENT), RDX_INFO_SENT = 0x1000, RDX_ACK_RCVD = 0x2000, RDX_INFO_RCVD = 0x4000, RDX_ACK_SENT = 0x8000, RDX_EXCHANGED = (RDX_ACK_RCVD | RDX_ACK_SENT) }; #define LDC_LOCK(ldcp) \ mutex_enter(&((ldcp)->cblock));\ mutex_enter(&((ldcp)->rxlock));\ mutex_enter(&((ldcp)->wrlock));\ mutex_enter(&((ldcp)->txlock));\ mutex_enter(&((ldcp)->tclock)); #define LDC_UNLOCK(ldcp) \ mutex_exit(&((ldcp)->tclock));\ mutex_exit(&((ldcp)->txlock));\ mutex_exit(&((ldcp)->wrlock));\ mutex_exit(&((ldcp)->rxlock));\ mutex_exit(&((ldcp)->cblock)); static struct ether_addr etherbroadcastaddr = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; /* * MIB II broadcast/multicast packets */ #define IS_BROADCAST(ehp) \ (ether_cmp(&ehp->ether_dhost, ðerbroadcastaddr) == 0) #define IS_MULTICAST(ehp) \ ((ehp->ether_dhost.ether_addr_octet[0] & 01) == 1) /* * Property names */ static char macaddr_propname[] = "mac-address"; static char rmacaddr_propname[] = "remote-mac-address"; static char channel_propname[] = "channel-endpoint"; static char reg_propname[] = "reg"; static char port_propname[] = "port"; static char swport_propname[] = "switch-port"; static char id_propname[] = "id"; /* versions supported - in decreasing order */ static vgen_ver_t vgen_versions[VGEN_NUM_VER] = { {1, 0} }; /* Tunables */ uint32_t vgen_hwd_interval = 5; /* handshake watchdog freq in sec */ uint32_t vgen_max_hretries = VNET_NUM_HANDSHAKES; /* # of handshake retries */ uint32_t vgen_ldcwr_retries = 10; /* max # of ldc_write() retries */ uint32_t vgen_ldcup_retries = 5; /* max # of ldc_up() retries */ uint32_t vgen_recv_delay = 1; /* delay when rx descr not ready */ uint32_t vgen_recv_retries = 10; /* retry when rx descr not ready */ uint32_t vgen_tx_retries = 0x4; /* retry when tx descr not available */ uint32_t vgen_tx_delay = 0x30; /* delay when tx descr not available */ int vgen_rcv_thread_enabled = 1; /* Enable Recieve thread */ /* * max # of packets accumulated prior to sending them up. It is best * to keep this at 60% of the number of recieve buffers. */ uint32_t vgen_chain_len = (VGEN_NRBUFS * 0.6); /* * Tunables for each receive buffer size and number of buffers for * each buffer size. */ uint32_t vgen_rbufsz1 = VGEN_DBLK_SZ_128; uint32_t vgen_rbufsz2 = VGEN_DBLK_SZ_256; uint32_t vgen_rbufsz3 = VGEN_DBLK_SZ_2048; uint32_t vgen_nrbufs1 = VGEN_NRBUFS; uint32_t vgen_nrbufs2 = VGEN_NRBUFS; uint32_t vgen_nrbufs3 = VGEN_NRBUFS; #ifdef DEBUG /* flags to simulate error conditions for debugging */ int vgen_trigger_txtimeout = 0; int vgen_trigger_rxlost = 0; #endif /* MD update matching structure */ static md_prop_match_t vport_prop_match[] = { { MDET_PROP_VAL, "id" }, { MDET_LIST_END, NULL } }; static mdeg_node_match_t vport_match = { "virtual-device-port", vport_prop_match }; /* template for matching a particular vnet instance */ static mdeg_prop_spec_t vgen_prop_template[] = { { MDET_PROP_STR, "name", "network" }, { MDET_PROP_VAL, "cfg-handle", NULL }, { MDET_LIST_END, NULL, NULL } }; #define VGEN_SET_MDEG_PROP_INST(specp, val) (specp)[1].ps_val = (val) static int vgen_mdeg_cb(void *cb_argp, mdeg_result_t *resp); static mac_callbacks_t vgen_m_callbacks = { 0, vgen_stat, vgen_start, vgen_stop, vgen_promisc, vgen_multicst, vgen_unicst, vgen_tx, NULL, NULL, NULL }; /* externs */ extern pri_t maxclsyspri; extern proc_t p0; extern uint32_t vnet_ntxds; extern uint32_t vnet_ldcwd_interval; extern uint32_t vnet_ldcwd_txtimeout; extern uint32_t vnet_ldc_mtu; extern uint32_t vnet_nrbufs; #ifdef DEBUG extern int vnet_dbglevel; static void debug_printf(const char *fname, vgen_t *vgenp, vgen_ldc_t *ldcp, const char *fmt, ...); /* -1 for all LDCs info, or ldc_id for a specific LDC info */ int vgendbg_ldcid = -1; /* simulate handshake error conditions for debug */ uint32_t vgen_hdbg; #define HDBG_VERSION 0x1 #define HDBG_TIMEOUT 0x2 #define HDBG_BAD_SID 0x4 #define HDBG_OUT_STATE 0x8 #endif /* * vgen_init() is called by an instance of vnet driver to initialize the * corresponding generic proxy transport layer. The arguments passed by vnet * are - an opaque pointer to the vnet instance, pointers to dev_info_t and * the mac address of the vnet device, and a pointer to mac_register_t of * the generic transport is returned in the last argument. */ int vgen_init(void *vnetp, dev_info_t *vnetdip, const uint8_t *macaddr, mac_register_t **vgenmacp) { vgen_t *vgenp; mac_register_t *macp; int instance; if ((vnetp == NULL) || (vnetdip == NULL)) return (DDI_FAILURE); instance = ddi_get_instance(vnetdip); DBG1(NULL, NULL, "vnet(%d): enter\n", instance); vgenp = kmem_zalloc(sizeof (vgen_t), KM_SLEEP); vgenp->vnetp = vnetp; vgenp->vnetdip = vnetdip; bcopy(macaddr, &(vgenp->macaddr), ETHERADDRL); if ((macp = mac_alloc(MAC_VERSION)) == NULL) { KMEM_FREE(vgenp); return (DDI_FAILURE); } macp->m_type_ident = MAC_PLUGIN_IDENT_ETHER; macp->m_driver = vgenp; macp->m_dip = vnetdip; macp->m_src_addr = (uint8_t *)&(vgenp->macaddr); macp->m_callbacks = &vgen_m_callbacks; macp->m_min_sdu = 0; macp->m_max_sdu = ETHERMTU; vgenp->macp = macp; /* allocate multicast table */ vgenp->mctab = kmem_zalloc(VGEN_INIT_MCTAB_SIZE * sizeof (struct ether_addr), KM_SLEEP); vgenp->mccount = 0; vgenp->mcsize = VGEN_INIT_MCTAB_SIZE; mutex_init(&vgenp->lock, NULL, MUTEX_DRIVER, NULL); rw_init(&vgenp->vgenports.rwlock, NULL, RW_DRIVER, NULL); /* register with MD event generator */ if (vgen_mdeg_reg(vgenp) != DDI_SUCCESS) { rw_destroy(&vgenp->vgenports.rwlock); mutex_destroy(&vgenp->lock); kmem_free(vgenp->mctab, VGEN_INIT_MCTAB_SIZE * sizeof (struct ether_addr)); mac_free(vgenp->macp); KMEM_FREE(vgenp); return (DDI_FAILURE); } /* register macp of this vgen_t with vnet */ *vgenmacp = vgenp->macp; DBG1(NULL, NULL, "vnet(%d): exit\n", instance); return (DDI_SUCCESS); } /* * Called by vnet to undo the initializations done by vgen_init(). * The handle provided by generic transport during vgen_init() is the argument. */ int vgen_uninit(void *arg) { vgen_t *vgenp = (vgen_t *)arg; vio_mblk_pool_t *rp, *nrp; if (vgenp == NULL) { return (DDI_FAILURE); } DBG1(vgenp, NULL, "enter\n"); /* unregister with MD event generator */ vgen_mdeg_unreg(vgenp); mutex_enter(&vgenp->lock); /* detach all ports from the device */ vgen_detach_ports(vgenp); /* * free any pending rx mblk pools, * that couldn't be freed previously during channel detach. */ rp = vgenp->rmp; while (rp != NULL) { nrp = vgenp->rmp = rp->nextp; if (vio_destroy_mblks(rp)) { vgenp->rmp = rp; mutex_exit(&vgenp->lock); return (DDI_FAILURE); } rp = nrp; } /* free multicast table */ kmem_free(vgenp->mctab, vgenp->mcsize * sizeof (struct ether_addr)); mac_free(vgenp->macp); mutex_exit(&vgenp->lock); rw_destroy(&vgenp->vgenports.rwlock); mutex_destroy(&vgenp->lock); KMEM_FREE(vgenp); DBG1(vgenp, NULL, "exit\n"); return (DDI_SUCCESS); } /* enable transmit/receive for the device */ int vgen_start(void *arg) { vgen_t *vgenp = (vgen_t *)arg; DBG1(vgenp, NULL, "enter\n"); mutex_enter(&vgenp->lock); vgen_init_ports(vgenp); vgenp->flags |= VGEN_STARTED; mutex_exit(&vgenp->lock); DBG1(vgenp, NULL, "exit\n"); return (DDI_SUCCESS); } /* stop transmit/receive */ void vgen_stop(void *arg) { vgen_t *vgenp = (vgen_t *)arg; DBG1(vgenp, NULL, "enter\n"); mutex_enter(&vgenp->lock); vgen_uninit_ports(vgenp); vgenp->flags &= ~(VGEN_STARTED); mutex_exit(&vgenp->lock); DBG1(vgenp, NULL, "exit\n"); } /* vgen transmit function */ static mblk_t * vgen_tx(void *arg, mblk_t *mp) { int i; vgen_port_t *portp; int status = VGEN_FAILURE; portp = (vgen_port_t *)arg; /* * Retry so that we avoid reporting a failure * to the upper layer. Returning a failure may cause the * upper layer to go into single threaded mode there by * causing performance degradation, especially for a large * number of connections. */ for (i = 0; i < vgen_tx_retries; ) { status = vgen_portsend(portp, mp); if (status == VGEN_SUCCESS) { break; } if (++i < vgen_tx_retries) delay(drv_usectohz(vgen_tx_delay)); } if (status != VGEN_SUCCESS) { /* failure */ return (mp); } /* success */ return (NULL); } /* transmit packets over the given port */ static int vgen_portsend(vgen_port_t *portp, mblk_t *mp) { vgen_ldclist_t *ldclp; vgen_ldc_t *ldcp; int status; int rv = VGEN_SUCCESS; ldclp = &portp->ldclist; READ_ENTER(&ldclp->rwlock); /* * NOTE: for now, we will assume we have a single channel. */ if (ldclp->headp == NULL) { RW_EXIT(&ldclp->rwlock); return (VGEN_FAILURE); } ldcp = ldclp->headp; status = vgen_ldcsend(ldcp, mp); RW_EXIT(&ldclp->rwlock); if (status != VGEN_TX_SUCCESS) { rv = VGEN_FAILURE; } return (rv); } /* channel transmit function */ static int vgen_ldcsend(vgen_ldc_t *ldcp, mblk_t *mp) { vgen_private_desc_t *tbufp; vgen_private_desc_t *rtbufp; vnet_public_desc_t *rtxdp; vgen_private_desc_t *ntbufp; vnet_public_desc_t *txdp; vio_dring_entry_hdr_t *hdrp; vgen_stats_t *statsp; struct ether_header *ehp; boolean_t is_bcast = B_FALSE; boolean_t is_mcast = B_FALSE; size_t mblksz; caddr_t dst; mblk_t *bp; size_t size; int rv = 0; ldc_status_t istatus; vgen_t *vgenp = LDC_TO_VGEN(ldcp); statsp = &ldcp->stats; size = msgsize(mp); DBG1(vgenp, ldcp, "enter\n"); if (ldcp->ldc_status != LDC_UP) { DWARN(vgenp, ldcp, "status(%d), dropping packet\n", ldcp->ldc_status); /* retry ldc_up() if needed */ if (ldcp->flags & CHANNEL_STARTED) (void) ldc_up(ldcp->ldc_handle); goto vgen_tx_exit; } /* drop the packet if ldc is not up or handshake is not done */ if (ldcp->hphase != VH_DONE) { DWARN(vgenp, ldcp, "hphase(%x), dropping packet\n", ldcp->hphase); goto vgen_tx_exit; } if (size > (size_t)ETHERMAX) { DWARN(vgenp, ldcp, "invalid size(%d)\n", size); goto vgen_tx_exit; } if (size < ETHERMIN) size = ETHERMIN; ehp = (struct ether_header *)mp->b_rptr; is_bcast = IS_BROADCAST(ehp); is_mcast = IS_MULTICAST(ehp); mutex_enter(&ldcp->txlock); /* * allocate a descriptor */ tbufp = ldcp->next_tbufp; ntbufp = NEXTTBUF(ldcp, tbufp); if (ntbufp == ldcp->cur_tbufp) { /* out of tbufs/txds */ mutex_enter(&ldcp->tclock); /* Try reclaiming now */ vgen_reclaim_dring(ldcp); ldcp->reclaim_lbolt = ddi_get_lbolt(); if (ntbufp == ldcp->cur_tbufp) { /* Now we are really out of tbuf/txds */ ldcp->need_resched = B_TRUE; mutex_exit(&ldcp->tclock); statsp->tx_no_desc++; mutex_exit(&ldcp->txlock); return (VGEN_TX_NORESOURCES); } mutex_exit(&ldcp->tclock); } /* update next available tbuf in the ring and update tx index */ ldcp->next_tbufp = ntbufp; INCR_TXI(ldcp->next_txi, ldcp); /* Mark the buffer busy before releasing the lock */ tbufp->flags = VGEN_PRIV_DESC_BUSY; mutex_exit(&ldcp->txlock); /* copy data into pre-allocated transmit buffer */ dst = tbufp->datap + VNET_IPALIGN; for (bp = mp; bp != NULL; bp = bp->b_cont) { mblksz = MBLKL(bp); bcopy(bp->b_rptr, dst, mblksz); dst += mblksz; } tbufp->datalen = size; /* initialize the corresponding public descriptor (txd) */ txdp = tbufp->descp; hdrp = &txdp->hdr; txdp->nbytes = size; txdp->ncookies = tbufp->ncookies; bcopy((tbufp->memcookie), (txdp->memcookie), tbufp->ncookies * sizeof (ldc_mem_cookie_t)); mutex_enter(&ldcp->wrlock); /* * If the flags not set to BUSY, it implies that the clobber * was done while we were copying the data. In such case, * discard the packet and return. */ if (tbufp->flags != VGEN_PRIV_DESC_BUSY) { statsp->oerrors++; mutex_exit(&ldcp->wrlock); goto vgen_tx_exit; } hdrp->dstate = VIO_DESC_READY; /* update stats */ statsp->opackets++; statsp->obytes += size; if (is_bcast) statsp->brdcstxmt++; else if (is_mcast) statsp->multixmt++; /* send dring datamsg to the peer */ if (ldcp->resched_peer) { rtbufp = &ldcp->tbufp[ldcp->resched_peer_txi]; rtxdp = rtbufp->descp; if (rtxdp->hdr.dstate == VIO_DESC_READY) { rv = vgen_send_dring_data(ldcp, (uint32_t)ldcp->resched_peer_txi, -1); if (rv != 0) { /* error: drop the packet */ DWARN(vgenp, ldcp, "vgen_send_dring_data " "failed: rv(%d) len(%d)\n", ldcp->ldc_id, rv, size); statsp->oerrors++; } else { ldcp->resched_peer = B_FALSE; } } } mutex_exit(&ldcp->wrlock); vgen_tx_exit: if (rv == ECONNRESET) { /* * Check if either callback thread or another tx thread is * already running. Calling mutex_enter() will result in a * deadlock if the other thread already holds cblock and is * blocked in vnet_modify_fdb() (which is called from * vgen_handle_evt_reset()) waiting for write access on rwlock, * as this transmit thread already holds that lock as a reader * in vnet_m_tx(). See comments in vnet_modify_fdb() in vnet.c. */ if (mutex_tryenter(&ldcp->cblock)) { if (ldc_status(ldcp->ldc_handle, &istatus) != 0) { DWARN(vgenp, ldcp, "ldc_status() error\n"); } else { ldcp->ldc_status = istatus; } if (ldcp->ldc_status != LDC_UP) { /* * Second arg is TRUE, as we know that * the caller of this function - vnet_m_tx(), * already holds fdb-rwlock as a reader. */ vgen_handle_evt_reset(ldcp, B_TRUE); } mutex_exit(&ldcp->cblock); } } freemsg(mp); DBG1(vgenp, ldcp, "exit\n"); return (VGEN_TX_SUCCESS); } /* enable/disable a multicast address */ int vgen_multicst(void *arg, boolean_t add, const uint8_t *mca) { vgen_t *vgenp; vnet_mcast_msg_t mcastmsg; vio_msg_tag_t *tagp; vgen_port_t *portp; vgen_portlist_t *plistp; vgen_ldc_t *ldcp; vgen_ldclist_t *ldclp; struct ether_addr *addrp; int rv = DDI_FAILURE; uint32_t i; vgenp = (vgen_t *)arg; addrp = (struct ether_addr *)mca; tagp = &mcastmsg.tag; bzero(&mcastmsg, sizeof (mcastmsg)); mutex_enter(&vgenp->lock); plistp = &(vgenp->vgenports); READ_ENTER(&plistp->rwlock); portp = vgenp->vsw_portp; if (portp == NULL) { RW_EXIT(&plistp->rwlock); mutex_exit(&vgenp->lock); return (rv); } ldclp = &portp->ldclist; READ_ENTER(&ldclp->rwlock); ldcp = ldclp->headp; if (ldcp == NULL) goto vgen_mcast_exit; mutex_enter(&ldcp->cblock); if (ldcp->hphase == VH_DONE) { /* * If handshake is done, send a msg to vsw to add/remove * the multicast address. Otherwise, we just update this * mcast address in our table and the table will be sync'd * with vsw when handshake completes. */ tagp->vio_msgtype = VIO_TYPE_CTRL; tagp->vio_subtype = VIO_SUBTYPE_INFO; tagp->vio_subtype_env = VNET_MCAST_INFO; tagp->vio_sid = ldcp->local_sid; bcopy(mca, &(mcastmsg.mca), ETHERADDRL); mcastmsg.set = add; mcastmsg.count = 1; if (vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (mcastmsg), B_FALSE) != VGEN_SUCCESS) { DWARN(vgenp, ldcp, "vgen_sendmsg failed\n"); mutex_exit(&ldcp->cblock); goto vgen_mcast_exit; } } mutex_exit(&ldcp->cblock); if (add) { /* expand multicast table if necessary */ if (vgenp->mccount >= vgenp->mcsize) { struct ether_addr *newtab; uint32_t newsize; newsize = vgenp->mcsize * 2; newtab = kmem_zalloc(newsize * sizeof (struct ether_addr), KM_NOSLEEP); if (newtab == NULL) goto vgen_mcast_exit; bcopy(vgenp->mctab, newtab, vgenp->mcsize * sizeof (struct ether_addr)); kmem_free(vgenp->mctab, vgenp->mcsize * sizeof (struct ether_addr)); vgenp->mctab = newtab; vgenp->mcsize = newsize; } /* add address to the table */ vgenp->mctab[vgenp->mccount++] = *addrp; } else { /* delete address from the table */ for (i = 0; i < vgenp->mccount; i++) { if (ether_cmp(addrp, &(vgenp->mctab[i])) == 0) { /* * If there's more than one address in this * table, delete the unwanted one by moving * the last one in the list over top of it; * otherwise, just remove it. */ if (vgenp->mccount > 1) { vgenp->mctab[i] = vgenp->mctab[vgenp->mccount-1]; } vgenp->mccount--; break; } } } rv = DDI_SUCCESS; vgen_mcast_exit: RW_EXIT(&ldclp->rwlock); RW_EXIT(&plistp->rwlock); mutex_exit(&vgenp->lock); return (rv); } /* set or clear promiscuous mode on the device */ static int vgen_promisc(void *arg, boolean_t on) { _NOTE(ARGUNUSED(arg, on)) return (DDI_SUCCESS); } /* set the unicast mac address of the device */ static int vgen_unicst(void *arg, const uint8_t *mca) { _NOTE(ARGUNUSED(arg, mca)) return (DDI_SUCCESS); } /* get device statistics */ int vgen_stat(void *arg, uint_t stat, uint64_t *val) { vgen_t *vgenp = (vgen_t *)arg; vgen_port_t *portp; vgen_portlist_t *plistp; *val = 0; plistp = &(vgenp->vgenports); READ_ENTER(&plistp->rwlock); for (portp = plistp->headp; portp != NULL; portp = portp->nextp) { *val += vgen_port_stat(portp, stat); } RW_EXIT(&plistp->rwlock); return (0); } static void vgen_ioctl(void *arg, queue_t *wq, mblk_t *mp) { _NOTE(ARGUNUSED(arg, wq, mp)) } /* vgen internal functions */ /* detach all ports from the device */ static void vgen_detach_ports(vgen_t *vgenp) { vgen_port_t *portp; vgen_portlist_t *plistp; plistp = &(vgenp->vgenports); WRITE_ENTER(&plistp->rwlock); while ((portp = plistp->headp) != NULL) { vgen_port_detach(portp); } RW_EXIT(&plistp->rwlock); } /* * detach the given port. */ static void vgen_port_detach(vgen_port_t *portp) { vgen_t *vgenp; vgen_ldclist_t *ldclp; int port_num; vgenp = portp->vgenp; port_num = portp->port_num; DBG1(vgenp, NULL, "port(%d):enter\n", port_num); /* remove it from port list */ vgen_port_list_remove(portp); /* detach channels from this port */ ldclp = &portp->ldclist; WRITE_ENTER(&ldclp->rwlock); while (ldclp->headp) { vgen_ldc_detach(ldclp->headp); } RW_EXIT(&ldclp->rwlock); rw_destroy(&ldclp->rwlock); if (vgenp->vsw_portp == portp) { vgenp->vsw_portp = NULL; } KMEM_FREE(portp); DBG1(vgenp, NULL, "port(%d):exit\n", port_num); } /* add a port to port list */ static void vgen_port_list_insert(vgen_port_t *portp) { vgen_portlist_t *plistp; vgen_t *vgenp; vgenp = portp->vgenp; plistp = &(vgenp->vgenports); if (plistp->headp == NULL) { plistp->headp = portp; } else { plistp->tailp->nextp = portp; } plistp->tailp = portp; portp->nextp = NULL; } /* remove a port from port list */ static void vgen_port_list_remove(vgen_port_t *portp) { vgen_port_t *prevp; vgen_port_t *nextp; vgen_portlist_t *plistp; vgen_t *vgenp; vgenp = portp->vgenp; plistp = &(vgenp->vgenports); if (plistp->headp == NULL) return; if (portp == plistp->headp) { plistp->headp = portp->nextp; if (portp == plistp->tailp) plistp->tailp = plistp->headp; } else { for (prevp = plistp->headp; ((nextp = prevp->nextp) != NULL) && (nextp != portp); prevp = nextp) ; if (nextp == portp) { prevp->nextp = portp->nextp; } if (portp == plistp->tailp) plistp->tailp = prevp; } } /* lookup a port in the list based on port_num */ static vgen_port_t * vgen_port_lookup(vgen_portlist_t *plistp, int port_num) { vgen_port_t *portp = NULL; for (portp = plistp->headp; portp != NULL; portp = portp->nextp) { if (portp->port_num == port_num) { break; } } return (portp); } /* enable ports for transmit/receive */ static void vgen_init_ports(vgen_t *vgenp) { vgen_port_t *portp; vgen_portlist_t *plistp; plistp = &(vgenp->vgenports); READ_ENTER(&plistp->rwlock); for (portp = plistp->headp; portp != NULL; portp = portp->nextp) { vgen_port_init(portp); } RW_EXIT(&plistp->rwlock); } static void vgen_port_init(vgen_port_t *portp) { vgen_t *vgenp; vgenp = portp->vgenp; /* * Create fdb entry in vnet, corresponding to the mac * address of this port. Note that the port specified * is vsw-port. This is done so that vsw-port acts * as the route to reach this macaddr, until the * channel for this port comes up (LDC_UP) and * handshake is done successfully. * eg, if the peer is OBP-vnet, it may not bring the * channel up for this port and may communicate via * vsw to reach this port. * Later, when Solaris-vnet comes up at the other end * of the channel for this port and brings up the channel, * it is an indication that peer vnet is capable of * distributed switching, so the direct route through this * port is specified in fdb, using vnet_modify_fdb(macaddr); */ vnet_add_fdb(vgenp->vnetp, (uint8_t *)&portp->macaddr, vgen_tx, vgenp->vsw_portp); if (portp == vgenp->vsw_portp) { /* * create the default route entry in vnet's fdb. * This is the entry used by vnet to reach * unknown destinations, which basically goes * through vsw on domain0 and out through the * physical device bound to vsw. */ vnet_add_def_rte(vgenp->vnetp, vgen_tx, portp); } /* Bring up the channels of this port */ vgen_init_ldcs(portp); } /* disable transmit/receive on ports */ static void vgen_uninit_ports(vgen_t *vgenp) { vgen_port_t *portp; vgen_portlist_t *plistp; plistp = &(vgenp->vgenports); READ_ENTER(&plistp->rwlock); for (portp = plistp->headp; portp != NULL; portp = portp->nextp) { vgen_port_uninit(portp); } RW_EXIT(&plistp->rwlock); } static void vgen_port_uninit(vgen_port_t *portp) { vgen_t *vgenp; vgenp = portp->vgenp; vgen_uninit_ldcs(portp); /* delete the entry in vnet's fdb for this port */ vnet_del_fdb(vgenp->vnetp, (uint8_t *)&portp->macaddr); if (portp == vgenp->vsw_portp) { /* * if this is vsw-port, then delete the default * route entry in vnet's fdb. */ vnet_del_def_rte(vgenp->vnetp); } } /* register with MD event generator */ static int vgen_mdeg_reg(vgen_t *vgenp) { mdeg_prop_spec_t *pspecp; mdeg_node_spec_t *parentp; uint_t templatesz; int rv; mdeg_handle_t hdl; int i; i = ddi_prop_get_int(DDI_DEV_T_ANY, vgenp->vnetdip, DDI_PROP_DONTPASS, reg_propname, -1); if (i == -1) { return (DDI_FAILURE); } templatesz = sizeof (vgen_prop_template); pspecp = kmem_zalloc(templatesz, KM_NOSLEEP); if (pspecp == NULL) { return (DDI_FAILURE); } parentp = kmem_zalloc(sizeof (mdeg_node_spec_t), KM_NOSLEEP); if (parentp == NULL) { kmem_free(pspecp, templatesz); return (DDI_FAILURE); } bcopy(vgen_prop_template, pspecp, templatesz); /* * NOTE: The instance here refers to the value of "reg" property and * not the dev_info instance (ddi_get_instance()) of vnet. */ VGEN_SET_MDEG_PROP_INST(pspecp, i); parentp->namep = "virtual-device"; parentp->specp = pspecp; /* save parentp in vgen_t */ vgenp->mdeg_parentp = parentp; rv = mdeg_register(parentp, &vport_match, vgen_mdeg_cb, vgenp, &hdl); if (rv != MDEG_SUCCESS) { DERR(vgenp, NULL, "mdeg_register failed\n"); KMEM_FREE(parentp); kmem_free(pspecp, templatesz); vgenp->mdeg_parentp = NULL; return (DDI_FAILURE); } /* save mdeg handle in vgen_t */ vgenp->mdeg_hdl = hdl; return (DDI_SUCCESS); } /* unregister with MD event generator */ static void vgen_mdeg_unreg(vgen_t *vgenp) { (void) mdeg_unregister(vgenp->mdeg_hdl); kmem_free(vgenp->mdeg_parentp->specp, sizeof (vgen_prop_template)); KMEM_FREE(vgenp->mdeg_parentp); vgenp->mdeg_parentp = NULL; vgenp->mdeg_hdl = NULL; } /* callback function registered with MD event generator */ static int vgen_mdeg_cb(void *cb_argp, mdeg_result_t *resp) { int idx; int vsw_idx = -1; uint64_t val; vgen_t *vgenp; if ((resp == NULL) || (cb_argp == NULL)) { return (MDEG_FAILURE); } vgenp = (vgen_t *)cb_argp; DBG1(vgenp, NULL, "enter\n"); mutex_enter(&vgenp->lock); DBG1(vgenp, NULL, "ports: removed(%x), " "added(%x), updated(%x)\n", resp->removed.nelem, resp->added.nelem, resp->match_curr.nelem); for (idx = 0; idx < resp->removed.nelem; idx++) { (void) vgen_remove_port(vgenp, resp->removed.mdp, resp->removed.mdep[idx]); } if (vgenp->vsw_portp == NULL) { /* * find vsw_port and add it first, because other ports need * this when adding fdb entry (see vgen_port_init()). */ for (idx = 0; idx < resp->added.nelem; idx++) { if (!(md_get_prop_val(resp->added.mdp, resp->added.mdep[idx], swport_propname, &val))) { if (val == 0) { /* * This port is connected to the * vsw on dom0. */ vsw_idx = idx; if (vgen_add_port(vgenp, resp->added.mdp, resp->added.mdep[idx]) != DDI_SUCCESS) { cmn_err(CE_NOTE, "vnet%d Could " "not initialize virtual " "switch port.", ddi_get_instance(vgenp-> vnetdip)); mutex_exit(&vgenp->lock); return (MDEG_FAILURE); } break; } } } if (vsw_idx == -1) { DWARN(vgenp, NULL, "can't find vsw_port\n"); mutex_exit(&vgenp->lock); return (MDEG_FAILURE); } } for (idx = 0; idx < resp->added.nelem; idx++) { if ((vsw_idx != -1) && (vsw_idx == idx)) /* skip vsw_port */ continue; /* If this port can't be added just skip it. */ (void) vgen_add_port(vgenp, resp->added.mdp, resp->added.mdep[idx]); } for (idx = 0; idx < resp->match_curr.nelem; idx++) { (void) vgen_update_port(vgenp, resp->match_curr.mdp, resp->match_curr.mdep[idx], resp->match_prev.mdp, resp->match_prev.mdep[idx]); } mutex_exit(&vgenp->lock); DBG1(vgenp, NULL, "exit\n"); return (MDEG_SUCCESS); } /* add a new port to the device */ static int vgen_add_port(vgen_t *vgenp, md_t *mdp, mde_cookie_t mdex) { uint64_t port_num; uint64_t *ldc_ids; uint64_t macaddr; uint64_t val; int num_ldcs; int vsw_port = B_FALSE; int i; int addrsz; int num_nodes = 0; int listsz = 0; int rv = DDI_SUCCESS; mde_cookie_t *listp = NULL; uint8_t *addrp; struct ether_addr ea; /* read "id" property to get the port number */ if (md_get_prop_val(mdp, mdex, id_propname, &port_num)) { DWARN(vgenp, NULL, "prop(%s) not found\n", id_propname); return (DDI_FAILURE); } /* * Find the channel endpoint node(s) under this port node. */ if ((num_nodes = md_node_count(mdp)) <= 0) { DWARN(vgenp, NULL, "invalid number of nodes found (%d)", num_nodes); return (DDI_FAILURE); } /* allocate space for node list */ listsz = num_nodes * sizeof (mde_cookie_t); listp = kmem_zalloc(listsz, KM_NOSLEEP); if (listp == NULL) return (DDI_FAILURE); num_ldcs = md_scan_dag(mdp, mdex, md_find_name(mdp, channel_propname), md_find_name(mdp, "fwd"), listp); if (num_ldcs <= 0) { DWARN(vgenp, NULL, "can't find %s nodes", channel_propname); kmem_free(listp, listsz); return (DDI_FAILURE); } DBG2(vgenp, NULL, "num_ldcs %d", num_ldcs); ldc_ids = kmem_zalloc(num_ldcs * sizeof (uint64_t), KM_NOSLEEP); if (ldc_ids == NULL) { kmem_free(listp, listsz); return (DDI_FAILURE); } for (i = 0; i < num_ldcs; i++) { /* read channel ids */ if (md_get_prop_val(mdp, listp[i], id_propname, &ldc_ids[i])) { DWARN(vgenp, NULL, "prop(%s) not found\n", id_propname); kmem_free(listp, listsz); kmem_free(ldc_ids, num_ldcs * sizeof (uint64_t)); return (DDI_FAILURE); } DBG2(vgenp, NULL, "ldc_id 0x%llx", ldc_ids[i]); } kmem_free(listp, listsz); if (md_get_prop_data(mdp, mdex, rmacaddr_propname, &addrp, &addrsz)) { DWARN(vgenp, NULL, "prop(%s) not found\n", rmacaddr_propname); kmem_free(ldc_ids, num_ldcs * sizeof (uint64_t)); return (DDI_FAILURE); } if (addrsz < ETHERADDRL) { DWARN(vgenp, NULL, "invalid address size (%d)\n", addrsz); kmem_free(ldc_ids, num_ldcs * sizeof (uint64_t)); return (DDI_FAILURE); } macaddr = *((uint64_t *)addrp); DBG2(vgenp, NULL, "remote mac address 0x%llx\n", macaddr); for (i = ETHERADDRL - 1; i >= 0; i--) { ea.ether_addr_octet[i] = macaddr & 0xFF; macaddr >>= 8; } if (vgenp->vsw_portp == NULL) { if (!(md_get_prop_val(mdp, mdex, swport_propname, &val))) { if (val == 0) { /* This port is connected to the vsw on dom0 */ vsw_port = B_TRUE; } } } if (vgen_port_attach_mdeg(vgenp, (int)port_num, ldc_ids, num_ldcs, &ea, vsw_port) != DDI_SUCCESS) { cmn_err(CE_NOTE, "vnet%d failed to attach port %d remote MAC " "address %s", ddi_get_instance(vgenp->vnetdip), (int)port_num, ether_sprintf(&ea)); rv = DDI_FAILURE; } kmem_free(ldc_ids, num_ldcs * sizeof (uint64_t)); return (rv); } /* remove a port from the device */ static int vgen_remove_port(vgen_t *vgenp, md_t *mdp, mde_cookie_t mdex) { uint64_t port_num; vgen_port_t *portp; vgen_portlist_t *plistp; /* read "id" property to get the port number */ if (md_get_prop_val(mdp, mdex, id_propname, &port_num)) { DWARN(vgenp, NULL, "prop(%s) not found\n", id_propname); return (DDI_FAILURE); } plistp = &(vgenp->vgenports); WRITE_ENTER(&plistp->rwlock); portp = vgen_port_lookup(plistp, (int)port_num); if (portp == NULL) { DWARN(vgenp, NULL, "can't find port(%lx)\n", port_num); RW_EXIT(&plistp->rwlock); return (DDI_FAILURE); } vgen_port_detach_mdeg(portp); RW_EXIT(&plistp->rwlock); return (DDI_SUCCESS); } /* attach a port to the device based on mdeg data */ static int vgen_port_attach_mdeg(vgen_t *vgenp, int port_num, uint64_t *ldcids, int num_ids, struct ether_addr *macaddr, boolean_t vsw_port) { vgen_port_t *portp; vgen_portlist_t *plistp; int i; portp = kmem_zalloc(sizeof (vgen_port_t), KM_NOSLEEP); if (portp == NULL) { return (DDI_FAILURE); } portp->vgenp = vgenp; portp->port_num = port_num; DBG1(vgenp, NULL, "port_num(%d)\n", portp->port_num); portp->ldclist.num_ldcs = 0; portp->ldclist.headp = NULL; rw_init(&portp->ldclist.rwlock, NULL, RW_DRIVER, NULL); ether_copy(macaddr, &portp->macaddr); for (i = 0; i < num_ids; i++) { DBG2(vgenp, NULL, "ldcid (%lx)\n", ldcids[i]); if (vgen_ldc_attach(portp, ldcids[i]) == DDI_FAILURE) { vgen_port_detach(portp); return (DDI_FAILURE); } } /* link it into the list of ports */ plistp = &(vgenp->vgenports); WRITE_ENTER(&plistp->rwlock); vgen_port_list_insert(portp); RW_EXIT(&plistp->rwlock); /* This port is connected to the vsw on domain0 */ if (vsw_port) vgenp->vsw_portp = portp; if (vgenp->flags & VGEN_STARTED) { /* interface is configured */ vgen_port_init(portp); } DBG1(vgenp, NULL, "exit: port_num(%d)\n", portp->port_num); return (DDI_SUCCESS); } /* detach a port from the device based on mdeg data */ static void vgen_port_detach_mdeg(vgen_port_t *portp) { vgen_t *vgenp = portp->vgenp; DBG1(vgenp, NULL, "enter: port_num(%d)\n", portp->port_num); /* stop the port if needed */ if (vgenp->flags & VGEN_STARTED) { vgen_port_uninit(portp); } vgen_port_detach(portp); DBG1(vgenp, NULL, "exit: port_num(%d)\n", portp->port_num); } static int vgen_update_port(vgen_t *vgenp, md_t *curr_mdp, mde_cookie_t curr_mdex, md_t *prev_mdp, mde_cookie_t prev_mdex) { _NOTE(ARGUNUSED(vgenp, curr_mdp, curr_mdex, prev_mdp, prev_mdex)) /* NOTE: TBD */ return (DDI_SUCCESS); } static uint64_t vgen_port_stat(vgen_port_t *portp, uint_t stat) { vgen_ldclist_t *ldclp; vgen_ldc_t *ldcp; uint64_t val; val = 0; ldclp = &portp->ldclist; READ_ENTER(&ldclp->rwlock); for (ldcp = ldclp->headp; ldcp != NULL; ldcp = ldcp->nextp) { val += vgen_ldc_stat(ldcp, stat); } RW_EXIT(&ldclp->rwlock); return (val); } /* attach the channel corresponding to the given ldc_id to the port */ static int vgen_ldc_attach(vgen_port_t *portp, uint64_t ldc_id) { vgen_t *vgenp; vgen_ldclist_t *ldclp; vgen_ldc_t *ldcp, **prev_ldcp; ldc_attr_t attr; int status; ldc_status_t istatus; char kname[MAXNAMELEN]; int instance; enum {AST_init = 0x0, AST_ldc_alloc = 0x1, AST_mutex_init = 0x2, AST_ldc_init = 0x4, AST_ldc_reg_cb = 0x8, AST_alloc_tx_ring = 0x10, AST_create_rxmblks = 0x20, AST_add_softintr = 0x40, AST_create_rcv_thread = 0x80} attach_state; attach_state = AST_init; vgenp = portp->vgenp; ldclp = &portp->ldclist; ldcp = kmem_zalloc(sizeof (vgen_ldc_t), KM_NOSLEEP); if (ldcp == NULL) { goto ldc_attach_failed; } ldcp->ldc_id = ldc_id; ldcp->portp = portp; attach_state |= AST_ldc_alloc; mutex_init(&ldcp->txlock, NULL, MUTEX_DRIVER, NULL); mutex_init(&ldcp->cblock, NULL, MUTEX_DRIVER, NULL); mutex_init(&ldcp->tclock, NULL, MUTEX_DRIVER, NULL); mutex_init(&ldcp->wrlock, NULL, MUTEX_DRIVER, NULL); mutex_init(&ldcp->rxlock, NULL, MUTEX_DRIVER, NULL); attach_state |= AST_mutex_init; attr.devclass = LDC_DEV_NT; attr.instance = ddi_get_instance(vgenp->vnetdip); attr.mode = LDC_MODE_UNRELIABLE; attr.mtu = vnet_ldc_mtu; status = ldc_init(ldc_id, &attr, &ldcp->ldc_handle); if (status != 0) { DWARN(vgenp, ldcp, "ldc_init failed,rv (%d)\n", status); goto ldc_attach_failed; } attach_state |= AST_ldc_init; if (vgen_rcv_thread_enabled) { ldcp->rcv_thr_flags = 0; ldcp->rcv_mhead = ldcp->rcv_mtail = NULL; ldcp->soft_pri = PIL_6; status = ddi_intr_add_softint(vgenp->vnetdip, &ldcp->soft_handle, ldcp->soft_pri, vgen_ldc_rcv_softintr, (void *)ldcp); if (status != DDI_SUCCESS) { DWARN(vgenp, ldcp, "add_softint failed, rv (%d)\n", status); goto ldc_attach_failed; } /* * Initialize the soft_lock with the same priority as * the soft interrupt to protect from the soft interrupt. */ mutex_init(&ldcp->soft_lock, NULL, MUTEX_DRIVER, DDI_INTR_PRI(ldcp->soft_pri)); attach_state |= AST_add_softintr; mutex_init(&ldcp->rcv_thr_lock, NULL, MUTEX_DRIVER, NULL); cv_init(&ldcp->rcv_thr_cv, NULL, CV_DRIVER, NULL); ldcp->rcv_thread = thread_create(NULL, 2 * DEFAULTSTKSZ, vgen_ldc_rcv_worker, ldcp, 0, &p0, TS_RUN, maxclsyspri); attach_state |= AST_create_rcv_thread; if (ldcp->rcv_thread == NULL) { DWARN(vgenp, ldcp, "Failed to create worker thread"); goto ldc_attach_failed; } } status = ldc_reg_callback(ldcp->ldc_handle, vgen_ldc_cb, (caddr_t)ldcp); if (status != 0) { DWARN(vgenp, ldcp, "ldc_reg_callback failed, rv (%d)\n", status); goto ldc_attach_failed; } attach_state |= AST_ldc_reg_cb; (void) ldc_status(ldcp->ldc_handle, &istatus); ASSERT(istatus == LDC_INIT); ldcp->ldc_status = istatus; /* allocate transmit resources */ status = vgen_alloc_tx_ring(ldcp); if (status != 0) { goto ldc_attach_failed; } attach_state |= AST_alloc_tx_ring; /* allocate receive resources */ status = vio_init_multipools(&ldcp->vmp, VGEN_NUM_VMPOOLS, vgen_rbufsz1, vgen_rbufsz2, vgen_rbufsz3, vgen_nrbufs1, vgen_nrbufs2, vgen_nrbufs3); if (status != 0) { goto ldc_attach_failed; } attach_state |= AST_create_rxmblks; /* Setup kstats for the channel */ instance = ddi_get_instance(vgenp->vnetdip); (void) sprintf(kname, "vnetldc0x%lx", ldcp->ldc_id); ldcp->ksp = vgen_setup_kstats("vnet", instance, kname, &ldcp->stats); if (ldcp->ksp == NULL) { goto ldc_attach_failed; } /* initialize vgen_versions supported */ bcopy(vgen_versions, ldcp->vgen_versions, sizeof (ldcp->vgen_versions)); /* link it into the list of channels for this port */ WRITE_ENTER(&ldclp->rwlock); prev_ldcp = (vgen_ldc_t **)(&ldclp->headp); ldcp->nextp = *prev_ldcp; *prev_ldcp = ldcp; ldclp->num_ldcs++; RW_EXIT(&ldclp->rwlock); ldcp->flags |= CHANNEL_ATTACHED; return (DDI_SUCCESS); ldc_attach_failed: if (attach_state & AST_ldc_reg_cb) { (void) ldc_unreg_callback(ldcp->ldc_handle); } if (attach_state & AST_add_softintr) { (void) ddi_intr_remove_softint(ldcp->soft_handle); mutex_destroy(&ldcp->soft_lock); } if (attach_state & AST_create_rcv_thread) { if (ldcp->rcv_thread != NULL) { vgen_stop_rcv_thread(ldcp); } mutex_destroy(&ldcp->rcv_thr_lock); cv_destroy(&ldcp->rcv_thr_cv); } if (attach_state & AST_create_rxmblks) { vio_mblk_pool_t *fvmp = NULL; vio_destroy_multipools(&ldcp->vmp, &fvmp); ASSERT(fvmp == NULL); } if (attach_state & AST_alloc_tx_ring) { vgen_free_tx_ring(ldcp); } if (attach_state & AST_ldc_init) { (void) ldc_fini(ldcp->ldc_handle); } if (attach_state & AST_mutex_init) { mutex_destroy(&ldcp->tclock); mutex_destroy(&ldcp->txlock); mutex_destroy(&ldcp->cblock); mutex_destroy(&ldcp->wrlock); mutex_destroy(&ldcp->rxlock); } if (attach_state & AST_ldc_alloc) { KMEM_FREE(ldcp); } return (DDI_FAILURE); } /* detach a channel from the port */ static void vgen_ldc_detach(vgen_ldc_t *ldcp) { vgen_port_t *portp; vgen_t *vgenp; vgen_ldc_t *pldcp; vgen_ldc_t **prev_ldcp; vgen_ldclist_t *ldclp; portp = ldcp->portp; vgenp = portp->vgenp; ldclp = &portp->ldclist; prev_ldcp = (vgen_ldc_t **)&ldclp->headp; for (; (pldcp = *prev_ldcp) != NULL; prev_ldcp = &pldcp->nextp) { if (pldcp == ldcp) { break; } } if (pldcp == NULL) { /* invalid ldcp? */ return; } if (ldcp->ldc_status != LDC_INIT) { DWARN(vgenp, ldcp, "ldc_status is not INIT\n"); } if (ldcp->flags & CHANNEL_ATTACHED) { ldcp->flags &= ~(CHANNEL_ATTACHED); (void) ldc_unreg_callback(ldcp->ldc_handle); if (ldcp->rcv_thread != NULL) { /* First stop the receive thread */ vgen_stop_rcv_thread(ldcp); (void) ddi_intr_remove_softint(ldcp->soft_handle); mutex_destroy(&ldcp->soft_lock); mutex_destroy(&ldcp->rcv_thr_lock); cv_destroy(&ldcp->rcv_thr_cv); } /* Free any queued messages */ if (ldcp->rcv_mhead != NULL) { freemsgchain(ldcp->rcv_mhead); ldcp->rcv_mhead = NULL; } vgen_destroy_kstats(ldcp->ksp); ldcp->ksp = NULL; /* * if we cannot reclaim all mblks, put this * on the list of pools(vgenp->rmp) to be reclaimed when the * device gets detached (see vgen_uninit()). */ vio_destroy_multipools(&ldcp->vmp, &vgenp->rmp); /* free transmit resources */ vgen_free_tx_ring(ldcp); (void) ldc_fini(ldcp->ldc_handle); mutex_destroy(&ldcp->tclock); mutex_destroy(&ldcp->txlock); mutex_destroy(&ldcp->cblock); mutex_destroy(&ldcp->wrlock); mutex_destroy(&ldcp->rxlock); /* unlink it from the list */ *prev_ldcp = ldcp->nextp; ldclp->num_ldcs--; KMEM_FREE(ldcp); } } /* * This function allocates transmit resources for the channel. * The resources consist of a transmit descriptor ring and an associated * transmit buffer ring. */ static int vgen_alloc_tx_ring(vgen_ldc_t *ldcp) { void *tbufp; ldc_mem_info_t minfo; uint32_t txdsize; uint32_t tbufsize; int status; vgen_t *vgenp = LDC_TO_VGEN(ldcp); ldcp->num_txds = vnet_ntxds; txdsize = sizeof (vnet_public_desc_t); tbufsize = sizeof (vgen_private_desc_t); /* allocate transmit buffer ring */ tbufp = kmem_zalloc(ldcp->num_txds * tbufsize, KM_NOSLEEP); if (tbufp == NULL) { return (DDI_FAILURE); } /* create transmit descriptor ring */ status = ldc_mem_dring_create(ldcp->num_txds, txdsize, &ldcp->tx_dhandle); if (status) { DWARN(vgenp, ldcp, "ldc_mem_dring_create() failed\n"); kmem_free(tbufp, ldcp->num_txds * tbufsize); return (DDI_FAILURE); } /* get the addr of descripror ring */ status = ldc_mem_dring_info(ldcp->tx_dhandle, &minfo); if (status) { DWARN(vgenp, ldcp, "ldc_mem_dring_info() failed\n"); kmem_free(tbufp, ldcp->num_txds * tbufsize); (void) ldc_mem_dring_destroy(ldcp->tx_dhandle); ldcp->tbufp = NULL; return (DDI_FAILURE); } ldcp->txdp = (vnet_public_desc_t *)(minfo.vaddr); ldcp->tbufp = tbufp; ldcp->txdendp = &((ldcp->txdp)[ldcp->num_txds]); ldcp->tbufendp = &((ldcp->tbufp)[ldcp->num_txds]); return (DDI_SUCCESS); } /* Free transmit resources for the channel */ static void vgen_free_tx_ring(vgen_ldc_t *ldcp) { int tbufsize = sizeof (vgen_private_desc_t); /* free transmit descriptor ring */ (void) ldc_mem_dring_destroy(ldcp->tx_dhandle); /* free transmit buffer ring */ kmem_free(ldcp->tbufp, ldcp->num_txds * tbufsize); ldcp->txdp = ldcp->txdendp = NULL; ldcp->tbufp = ldcp->tbufendp = NULL; } /* enable transmit/receive on the channels for the port */ static void vgen_init_ldcs(vgen_port_t *portp) { vgen_ldclist_t *ldclp = &portp->ldclist; vgen_ldc_t *ldcp; READ_ENTER(&ldclp->rwlock); ldcp = ldclp->headp; for (; ldcp != NULL; ldcp = ldcp->nextp) { (void) vgen_ldc_init(ldcp); } RW_EXIT(&ldclp->rwlock); } /* stop transmit/receive on the channels for the port */ static void vgen_uninit_ldcs(vgen_port_t *portp) { vgen_ldclist_t *ldclp = &portp->ldclist; vgen_ldc_t *ldcp; READ_ENTER(&ldclp->rwlock); ldcp = ldclp->headp; for (; ldcp != NULL; ldcp = ldcp->nextp) { vgen_ldc_uninit(ldcp); } RW_EXIT(&ldclp->rwlock); } /* enable transmit/receive on the channel */ static int vgen_ldc_init(vgen_ldc_t *ldcp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); ldc_status_t istatus; int rv; uint32_t retries = 0; enum { ST_init = 0x0, ST_ldc_open = 0x1, ST_init_tbufs = 0x2, ST_cb_enable = 0x4} init_state; init_state = ST_init; DBG1(vgenp, ldcp, "enter\n"); LDC_LOCK(ldcp); rv = ldc_open(ldcp->ldc_handle); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_open failed: rv(%d)\n", rv); goto ldcinit_failed; } init_state |= ST_ldc_open; (void) ldc_status(ldcp->ldc_handle, &istatus); if (istatus != LDC_OPEN && istatus != LDC_READY) { DWARN(vgenp, ldcp, "status(%d) is not OPEN/READY\n", istatus); goto ldcinit_failed; } ldcp->ldc_status = istatus; rv = vgen_init_tbufs(ldcp); if (rv != 0) { DWARN(vgenp, ldcp, "vgen_init_tbufs() failed\n"); goto ldcinit_failed; } init_state |= ST_init_tbufs; rv = ldc_set_cb_mode(ldcp->ldc_handle, LDC_CB_ENABLE); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_set_cb_mode failed: rv(%d)\n", rv); goto ldcinit_failed; } init_state |= ST_cb_enable; do { rv = ldc_up(ldcp->ldc_handle); if ((rv != 0) && (rv == EWOULDBLOCK)) { DBG2(vgenp, ldcp, "ldc_up err rv(%d)\n", rv); drv_usecwait(VGEN_LDC_UP_DELAY); } if (retries++ >= vgen_ldcup_retries) break; } while (rv == EWOULDBLOCK); (void) ldc_status(ldcp->ldc_handle, &istatus); if (istatus == LDC_UP) { DWARN(vgenp, ldcp, "status(%d) is UP\n", istatus); } ldcp->ldc_status = istatus; /* initialize transmit watchdog timeout */ ldcp->wd_tid = timeout(vgen_ldc_watchdog, (caddr_t)ldcp, drv_usectohz(vnet_ldcwd_interval * 1000)); ldcp->hphase = -1; ldcp->flags |= CHANNEL_STARTED; /* if channel is already UP - start handshake */ if (istatus == LDC_UP) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); if (ldcp->portp != vgenp->vsw_portp) { /* * modify fdb entry to use this port as the * channel is up, instead of going through the * vsw-port (see comments in vgen_port_init()) */ vnet_modify_fdb(vgenp->vnetp, (uint8_t *)&ldcp->portp->macaddr, vgen_tx, ldcp->portp, B_FALSE); } /* Initialize local session id */ ldcp->local_sid = ddi_get_lbolt(); /* clear peer session id */ ldcp->peer_sid = 0; ldcp->hretries = 0; /* Initiate Handshake process with peer ldc endpoint */ vgen_reset_hphase(ldcp); mutex_exit(&ldcp->tclock); mutex_exit(&ldcp->txlock); mutex_exit(&ldcp->wrlock); mutex_exit(&ldcp->rxlock); vgen_handshake(vh_nextphase(ldcp)); mutex_exit(&ldcp->cblock); } else { LDC_UNLOCK(ldcp); } return (DDI_SUCCESS); ldcinit_failed: if (init_state & ST_cb_enable) { (void) ldc_set_cb_mode(ldcp->ldc_handle, LDC_CB_DISABLE); } if (init_state & ST_init_tbufs) { vgen_uninit_tbufs(ldcp); } if (init_state & ST_ldc_open) { (void) ldc_close(ldcp->ldc_handle); } LDC_UNLOCK(ldcp); DBG1(vgenp, ldcp, "exit\n"); return (DDI_FAILURE); } /* stop transmit/receive on the channel */ static void vgen_ldc_uninit(vgen_ldc_t *ldcp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); int rv; DBG1(vgenp, ldcp, "enter\n"); LDC_LOCK(ldcp); if ((ldcp->flags & CHANNEL_STARTED) == 0) { LDC_UNLOCK(ldcp); DWARN(vgenp, ldcp, "CHANNEL_STARTED flag is not set\n"); return; } /* disable further callbacks */ rv = ldc_set_cb_mode(ldcp->ldc_handle, LDC_CB_DISABLE); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_set_cb_mode failed\n"); } /* * clear handshake done bit and wait for pending tx and cb to finish. * release locks before untimeout(9F) is invoked to cancel timeouts. */ ldcp->hphase &= ~(VH_DONE); LDC_UNLOCK(ldcp); /* cancel handshake watchdog timeout */ if (ldcp->htid) { (void) untimeout(ldcp->htid); ldcp->htid = 0; } /* cancel transmit watchdog timeout */ if (ldcp->wd_tid) { (void) untimeout(ldcp->wd_tid); ldcp->wd_tid = 0; } drv_usecwait(1000); /* acquire locks again; any pending transmits and callbacks are done */ LDC_LOCK(ldcp); vgen_reset_hphase(ldcp); vgen_uninit_tbufs(ldcp); rv = ldc_close(ldcp->ldc_handle); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_close err\n"); } ldcp->ldc_status = LDC_INIT; ldcp->flags &= ~(CHANNEL_STARTED); LDC_UNLOCK(ldcp); DBG1(vgenp, ldcp, "exit\n"); } /* Initialize the transmit buffer ring for the channel */ static int vgen_init_tbufs(vgen_ldc_t *ldcp) { vgen_private_desc_t *tbufp; vnet_public_desc_t *txdp; vio_dring_entry_hdr_t *hdrp; int i; int rv; caddr_t datap = NULL; int ci; uint32_t ncookies; bzero(ldcp->tbufp, sizeof (*tbufp) * (ldcp->num_txds)); bzero(ldcp->txdp, sizeof (*txdp) * (ldcp->num_txds)); datap = kmem_zalloc(ldcp->num_txds * VGEN_TXDBLK_SZ, KM_SLEEP); ldcp->tx_datap = datap; /* * for each private descriptor, allocate a ldc mem_handle which is * required to map the data during transmit, set the flags * to free (available for use by transmit routine). */ for (i = 0; i < ldcp->num_txds; i++) { tbufp = &(ldcp->tbufp[i]); rv = ldc_mem_alloc_handle(ldcp->ldc_handle, &(tbufp->memhandle)); if (rv) { tbufp->memhandle = 0; goto init_tbufs_failed; } /* * bind ldc memhandle to the corresponding transmit buffer. */ ci = ncookies = 0; rv = ldc_mem_bind_handle(tbufp->memhandle, (caddr_t)datap, VGEN_TXDBLK_SZ, LDC_SHADOW_MAP, LDC_MEM_R, &(tbufp->memcookie[ci]), &ncookies); if (rv != 0) { goto init_tbufs_failed; } /* * successful in binding the handle to tx data buffer. * set datap in the private descr to this buffer. */ tbufp->datap = datap; if ((ncookies == 0) || (ncookies > MAX_COOKIES)) { goto init_tbufs_failed; } for (ci = 1; ci < ncookies; ci++) { rv = ldc_mem_nextcookie(tbufp->memhandle, &(tbufp->memcookie[ci])); if (rv != 0) { goto init_tbufs_failed; } } tbufp->ncookies = ncookies; datap += VGEN_TXDBLK_SZ; tbufp->flags = VGEN_PRIV_DESC_FREE; txdp = &(ldcp->txdp[i]); hdrp = &txdp->hdr; hdrp->dstate = VIO_DESC_FREE; hdrp->ack = B_FALSE; tbufp->descp = txdp; } /* reset tbuf walking pointers */ ldcp->next_tbufp = ldcp->tbufp; ldcp->cur_tbufp = ldcp->tbufp; /* initialize tx seqnum and index */ ldcp->next_txseq = VNET_ISS; ldcp->next_txi = 0; ldcp->resched_peer = B_TRUE; ldcp->resched_peer_txi = 0; return (DDI_SUCCESS); init_tbufs_failed:; vgen_uninit_tbufs(ldcp); return (DDI_FAILURE); } /* Uninitialize transmit buffer ring for the channel */ static void vgen_uninit_tbufs(vgen_ldc_t *ldcp) { vgen_private_desc_t *tbufp = ldcp->tbufp; int i; /* for each tbuf (priv_desc), free ldc mem_handle */ for (i = 0; i < ldcp->num_txds; i++) { tbufp = &(ldcp->tbufp[i]); if (tbufp->datap) { /* if bound to a ldc memhandle */ (void) ldc_mem_unbind_handle(tbufp->memhandle); tbufp->datap = NULL; } if (tbufp->memhandle) { (void) ldc_mem_free_handle(tbufp->memhandle); tbufp->memhandle = 0; } } if (ldcp->tx_datap) { /* prealloc'd tx data buffer */ kmem_free(ldcp->tx_datap, ldcp->num_txds * VGEN_TXDBLK_SZ); ldcp->tx_datap = NULL; } bzero(ldcp->tbufp, sizeof (vgen_private_desc_t) * (ldcp->num_txds)); bzero(ldcp->txdp, sizeof (vnet_public_desc_t) * (ldcp->num_txds)); } /* clobber tx descriptor ring */ static void vgen_clobber_tbufs(vgen_ldc_t *ldcp) { vnet_public_desc_t *txdp; vgen_private_desc_t *tbufp; vio_dring_entry_hdr_t *hdrp; vgen_t *vgenp = LDC_TO_VGEN(ldcp); int i; #ifdef DEBUG int ndone = 0; #endif for (i = 0; i < ldcp->num_txds; i++) { tbufp = &(ldcp->tbufp[i]); txdp = tbufp->descp; hdrp = &txdp->hdr; if (tbufp->flags & VGEN_PRIV_DESC_BUSY) { tbufp->flags = VGEN_PRIV_DESC_FREE; #ifdef DEBUG if (hdrp->dstate == VIO_DESC_DONE) ndone++; #endif hdrp->dstate = VIO_DESC_FREE; hdrp->ack = B_FALSE; } } /* reset tbuf walking pointers */ ldcp->next_tbufp = ldcp->tbufp; ldcp->cur_tbufp = ldcp->tbufp; /* reset tx seqnum and index */ ldcp->next_txseq = VNET_ISS; ldcp->next_txi = 0; ldcp->resched_peer = B_TRUE; ldcp->resched_peer_txi = 0; DBG2(vgenp, ldcp, "num descrs done (%d)\n", ndone); } /* clobber receive descriptor ring */ static void vgen_clobber_rxds(vgen_ldc_t *ldcp) { ldcp->rx_dhandle = 0; bzero(&ldcp->rx_dcookie, sizeof (ldcp->rx_dcookie)); ldcp->rxdp = NULL; ldcp->next_rxi = 0; ldcp->num_rxds = 0; ldcp->next_rxseq = VNET_ISS; } /* initialize receive descriptor ring */ static int vgen_init_rxds(vgen_ldc_t *ldcp, uint32_t num_desc, uint32_t desc_size, ldc_mem_cookie_t *dcookie, uint32_t ncookies) { int rv; ldc_mem_info_t minfo; rv = ldc_mem_dring_map(ldcp->ldc_handle, dcookie, ncookies, num_desc, desc_size, LDC_SHADOW_MAP, &(ldcp->rx_dhandle)); if (rv != 0) { return (DDI_FAILURE); } /* * sucessfully mapped, now try to * get info about the mapped dring */ rv = ldc_mem_dring_info(ldcp->rx_dhandle, &minfo); if (rv != 0) { (void) ldc_mem_dring_unmap(ldcp->rx_dhandle); return (DDI_FAILURE); } /* * save ring address, number of descriptors. */ ldcp->rxdp = (vnet_public_desc_t *)(minfo.vaddr); bcopy(dcookie, &(ldcp->rx_dcookie), sizeof (*dcookie)); ldcp->num_rxdcookies = ncookies; ldcp->num_rxds = num_desc; ldcp->next_rxi = 0; ldcp->next_rxseq = VNET_ISS; return (DDI_SUCCESS); } /* get channel statistics */ static uint64_t vgen_ldc_stat(vgen_ldc_t *ldcp, uint_t stat) { vgen_stats_t *statsp; uint64_t val; val = 0; statsp = &ldcp->stats; switch (stat) { case MAC_STAT_MULTIRCV: val = statsp->multircv; break; case MAC_STAT_BRDCSTRCV: val = statsp->brdcstrcv; break; case MAC_STAT_MULTIXMT: val = statsp->multixmt; break; case MAC_STAT_BRDCSTXMT: val = statsp->brdcstxmt; break; case MAC_STAT_NORCVBUF: val = statsp->norcvbuf; break; case MAC_STAT_IERRORS: val = statsp->ierrors; break; case MAC_STAT_NOXMTBUF: val = statsp->noxmtbuf; break; case MAC_STAT_OERRORS: val = statsp->oerrors; break; case MAC_STAT_COLLISIONS: break; case MAC_STAT_RBYTES: val = statsp->rbytes; break; case MAC_STAT_IPACKETS: val = statsp->ipackets; break; case MAC_STAT_OBYTES: val = statsp->obytes; break; case MAC_STAT_OPACKETS: val = statsp->opackets; break; /* stats not relevant to ldc, return 0 */ case MAC_STAT_IFSPEED: case ETHER_STAT_ALIGN_ERRORS: case ETHER_STAT_FCS_ERRORS: case ETHER_STAT_FIRST_COLLISIONS: case ETHER_STAT_MULTI_COLLISIONS: case ETHER_STAT_DEFER_XMTS: case ETHER_STAT_TX_LATE_COLLISIONS: case ETHER_STAT_EX_COLLISIONS: case ETHER_STAT_MACXMT_ERRORS: case ETHER_STAT_CARRIER_ERRORS: case ETHER_STAT_TOOLONG_ERRORS: case ETHER_STAT_XCVR_ADDR: case ETHER_STAT_XCVR_ID: case ETHER_STAT_XCVR_INUSE: case ETHER_STAT_CAP_1000FDX: case ETHER_STAT_CAP_1000HDX: case ETHER_STAT_CAP_100FDX: case ETHER_STAT_CAP_100HDX: case ETHER_STAT_CAP_10FDX: case ETHER_STAT_CAP_10HDX: case ETHER_STAT_CAP_ASMPAUSE: case ETHER_STAT_CAP_PAUSE: case ETHER_STAT_CAP_AUTONEG: case ETHER_STAT_ADV_CAP_1000FDX: case ETHER_STAT_ADV_CAP_1000HDX: case ETHER_STAT_ADV_CAP_100FDX: case ETHER_STAT_ADV_CAP_100HDX: case ETHER_STAT_ADV_CAP_10FDX: case ETHER_STAT_ADV_CAP_10HDX: case ETHER_STAT_ADV_CAP_ASMPAUSE: case ETHER_STAT_ADV_CAP_PAUSE: case ETHER_STAT_ADV_CAP_AUTONEG: case ETHER_STAT_LP_CAP_1000FDX: case ETHER_STAT_LP_CAP_1000HDX: case ETHER_STAT_LP_CAP_100FDX: case ETHER_STAT_LP_CAP_100HDX: case ETHER_STAT_LP_CAP_10FDX: case ETHER_STAT_LP_CAP_10HDX: case ETHER_STAT_LP_CAP_ASMPAUSE: case ETHER_STAT_LP_CAP_PAUSE: case ETHER_STAT_LP_CAP_AUTONEG: case ETHER_STAT_LINK_ASMPAUSE: case ETHER_STAT_LINK_PAUSE: case ETHER_STAT_LINK_AUTONEG: case ETHER_STAT_LINK_DUPLEX: default: val = 0; break; } return (val); } /* * LDC channel is UP, start handshake process with peer. * Flag tells vnet_modify_fdb() about the context: set to B_TRUE if this * function is being called from transmit routine, otherwise B_FALSE. */ static void vgen_handle_evt_up(vgen_ldc_t *ldcp, boolean_t flag) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); ASSERT(MUTEX_HELD(&ldcp->cblock)); if (ldcp->portp != vgenp->vsw_portp) { /* * modify fdb entry to use this port as the * channel is up, instead of going through the * vsw-port (see comments in vgen_port_init()) */ vnet_modify_fdb(vgenp->vnetp, (uint8_t *)&ldcp->portp->macaddr, vgen_tx, ldcp->portp, flag); } /* Initialize local session id */ ldcp->local_sid = ddi_get_lbolt(); /* clear peer session id */ ldcp->peer_sid = 0; ldcp->hretries = 0; if (ldcp->hphase != VH_PHASE0) { vgen_handshake_reset(ldcp); } /* Initiate Handshake process with peer ldc endpoint */ vgen_handshake(vh_nextphase(ldcp)); DBG1(vgenp, ldcp, "exit\n"); } /* * LDC channel is Reset, terminate connection with peer and try to * bring the channel up again. * Flag tells vnet_modify_fdb() about the context: set to B_TRUE if this * function is being called from transmit routine, otherwise B_FALSE. */ static void vgen_handle_evt_reset(vgen_ldc_t *ldcp, boolean_t flag) { ldc_status_t istatus; vgen_t *vgenp = LDC_TO_VGEN(ldcp); int rv; DBG1(vgenp, ldcp, "enter\n"); ASSERT(MUTEX_HELD(&ldcp->cblock)); if ((ldcp->portp != vgenp->vsw_portp) && (vgenp->vsw_portp != NULL)) { /* * modify fdb entry to use vsw-port as the * channel is reset and we don't have a direct * link to the destination (see comments * in vgen_port_init()). */ vnet_modify_fdb(vgenp->vnetp, (uint8_t *)&ldcp->portp->macaddr, vgen_tx, vgenp->vsw_portp, flag); } if (ldcp->hphase != VH_PHASE0) { vgen_handshake_reset(ldcp); } /* try to bring the channel up */ rv = ldc_up(ldcp->ldc_handle); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_up err rv(%d)\n", rv); } if (ldc_status(ldcp->ldc_handle, &istatus) != 0) { DWARN(vgenp, ldcp, "ldc_status err\n"); } else { ldcp->ldc_status = istatus; } /* if channel is already UP - restart handshake */ if (ldcp->ldc_status == LDC_UP) { vgen_handle_evt_up(ldcp, flag); } DBG1(vgenp, ldcp, "exit\n"); } /* Interrupt handler for the channel */ static uint_t vgen_ldc_cb(uint64_t event, caddr_t arg) { _NOTE(ARGUNUSED(event)) vgen_ldc_t *ldcp; vgen_t *vgenp; ldc_status_t istatus; mblk_t *bp = NULL; vgen_stats_t *statsp; ldcp = (vgen_ldc_t *)arg; vgenp = LDC_TO_VGEN(ldcp); statsp = &ldcp->stats; DBG1(vgenp, ldcp, "enter\n"); mutex_enter(&ldcp->cblock); statsp->callbacks++; if ((ldcp->ldc_status == LDC_INIT) || (ldcp->ldc_handle == NULL)) { DWARN(vgenp, ldcp, "status(%d) is LDC_INIT\n", ldcp->ldc_status); mutex_exit(&ldcp->cblock); return (LDC_SUCCESS); } /* * NOTE: not using switch() as event could be triggered by * a state change and a read request. Also the ordering of the * check for the event types is deliberate. */ if (event & LDC_EVT_UP) { if (ldc_status(ldcp->ldc_handle, &istatus) != 0) { DWARN(vgenp, ldcp, "ldc_status err\n"); /* status couldn't be determined */ mutex_exit(&ldcp->cblock); return (LDC_FAILURE); } ldcp->ldc_status = istatus; if (ldcp->ldc_status != LDC_UP) { DWARN(vgenp, ldcp, "LDC_EVT_UP received " " but ldc status is not UP(0x%x)\n", ldcp->ldc_status); /* spurious interrupt, return success */ mutex_exit(&ldcp->cblock); return (LDC_SUCCESS); } DWARN(vgenp, ldcp, "event(%lx) UP, status(%d)\n", event, ldcp->ldc_status); vgen_handle_evt_up(ldcp, B_FALSE); ASSERT((event & (LDC_EVT_RESET | LDC_EVT_DOWN)) == 0); } /* Handle RESET/DOWN before READ event */ if (event & (LDC_EVT_RESET | LDC_EVT_DOWN)) { if (ldc_status(ldcp->ldc_handle, &istatus) != 0) { DWARN(vgenp, ldcp, "ldc_status error\n"); /* status couldn't be determined */ mutex_exit(&ldcp->cblock); return (LDC_FAILURE); } ldcp->ldc_status = istatus; DWARN(vgenp, ldcp, "event(%lx) RESET/DOWN, status(%d)\n", event, ldcp->ldc_status); vgen_handle_evt_reset(ldcp, B_FALSE); /* * As the channel is down/reset, ignore READ event * but print a debug warning message. */ if (event & LDC_EVT_READ) { DWARN(vgenp, ldcp, "LDC_EVT_READ set along with RESET/DOWN\n"); event &= ~LDC_EVT_READ; } } if (event & LDC_EVT_READ) { DBG2(vgenp, ldcp, "event(%lx) READ, status(%d)\n", event, ldcp->ldc_status); ASSERT((event & (LDC_EVT_RESET | LDC_EVT_DOWN)) == 0); if (ldcp->rcv_thread != NULL) { /* * If the receive thread is enabled, then * wakeup the receive thread to process the * LDC messages. */ mutex_exit(&ldcp->cblock); mutex_enter(&ldcp->rcv_thr_lock); if (!(ldcp->rcv_thr_flags & VGEN_WTHR_DATARCVD)) { ldcp->rcv_thr_flags |= VGEN_WTHR_DATARCVD; cv_signal(&ldcp->rcv_thr_cv); } mutex_exit(&ldcp->rcv_thr_lock); mutex_enter(&ldcp->cblock); } else { vgen_handle_evt_read(ldcp); bp = ldcp->rcv_mhead; ldcp->rcv_mhead = ldcp->rcv_mtail = NULL; } } mutex_exit(&ldcp->cblock); /* send up the received packets to MAC layer */ if (bp != NULL) { vnet_rx(vgenp->vnetp, NULL, bp); } if (ldcp->cancel_htid) { /* * Cancel handshake timer. * untimeout(9F) will not return until the pending callback is * cancelled or has run. No problems will result from calling * untimeout if the handler has already completed. * If the timeout handler did run, then it would just * return as cancel_htid is set. */ (void) untimeout(ldcp->cancel_htid); ldcp->cancel_htid = 0; } DBG1(vgenp, ldcp, "exit\n"); return (LDC_SUCCESS); } static void vgen_handle_evt_read(vgen_ldc_t *ldcp) { int rv; uint64_t ldcmsg[7]; size_t msglen; vgen_t *vgenp = LDC_TO_VGEN(ldcp); vio_msg_tag_t *tagp; ldc_status_t istatus; boolean_t has_data; DBG1(vgenp, ldcp, "enter\n"); /* * If the receive thread is enabled, then the cblock * need to be acquired here. If not, the vgen_ldc_cb() * calls this function with cblock held already. */ if (ldcp->rcv_thread != NULL) { mutex_enter(&ldcp->cblock); } else { ASSERT(MUTEX_HELD(&ldcp->cblock)); } vgen_evt_read: do { msglen = sizeof (ldcmsg); rv = ldc_read(ldcp->ldc_handle, (caddr_t)&ldcmsg, &msglen); if (rv != 0) { DWARN(vgenp, ldcp, "err rv(%d) len(%d)\n", rv, msglen); if (rv == ECONNRESET) goto vgen_evtread_error; break; } if (msglen == 0) { DBG2(vgenp, ldcp, "ldc_read NODATA"); break; } DBG2(vgenp, ldcp, "ldc_read msglen(%d)", msglen); tagp = (vio_msg_tag_t *)ldcmsg; if (ldcp->peer_sid) { /* * check sid only after we have received peer's sid * in the version negotiate msg. */ #ifdef DEBUG if (vgen_hdbg & HDBG_BAD_SID) { /* simulate bad sid condition */ tagp->vio_sid = 0; vgen_hdbg &= ~(HDBG_BAD_SID); } #endif rv = vgen_check_sid(ldcp, tagp); if (rv != VGEN_SUCCESS) { /* * If sid mismatch is detected, * reset the channel. */ ldcp->need_ldc_reset = B_TRUE; goto vgen_evtread_error; } } switch (tagp->vio_msgtype) { case VIO_TYPE_CTRL: rv = vgen_handle_ctrlmsg(ldcp, tagp); break; case VIO_TYPE_DATA: rv = vgen_handle_datamsg(ldcp, tagp); break; case VIO_TYPE_ERR: vgen_handle_errmsg(ldcp, tagp); break; default: DWARN(vgenp, ldcp, "Unknown VIO_TYPE(%x)\n", tagp->vio_msgtype); break; } /* * If an error is encountered, stop processing and * handle the error. */ if (rv != 0) { goto vgen_evtread_error; } } while (msglen); /* check once more before exiting */ rv = ldc_chkq(ldcp->ldc_handle, &has_data); if ((rv == 0) && (has_data == B_TRUE)) { DTRACE_PROBE(vgen_chkq); goto vgen_evt_read; } vgen_evtread_error: if (rv == ECONNRESET) { if (ldc_status(ldcp->ldc_handle, &istatus) != 0) { DWARN(vgenp, ldcp, "ldc_status err\n"); } else { ldcp->ldc_status = istatus; } vgen_handle_evt_reset(ldcp, B_FALSE); } else if (rv) { vgen_handshake_retry(ldcp); } /* * If the receive thread is not enabled, then cancel the * handshake timeout here. */ if (ldcp->rcv_thread != NULL) { mutex_exit(&ldcp->cblock); if (ldcp->cancel_htid) { /* * Cancel handshake timer. untimeout(9F) will * not return until the pending callback is cancelled * or has run. No problems will result from calling * untimeout if the handler has already completed. * If the timeout handler did run, then it would just * return as cancel_htid is set. */ (void) untimeout(ldcp->cancel_htid); ldcp->cancel_htid = 0; } } DBG1(vgenp, ldcp, "exit\n"); } /* vgen handshake functions */ /* change the hphase for the channel to the next phase */ static vgen_ldc_t * vh_nextphase(vgen_ldc_t *ldcp) { if (ldcp->hphase == VH_PHASE3) { ldcp->hphase = VH_DONE; } else { ldcp->hphase++; } return (ldcp); } /* * Check whether the given version is supported or not and * return VGEN_SUCCESS if supported. */ static int vgen_supported_version(vgen_ldc_t *ldcp, uint16_t ver_major, uint16_t ver_minor) { vgen_ver_t *versions = ldcp->vgen_versions; int i = 0; while (i < VGEN_NUM_VER) { if ((versions[i].ver_major == 0) && (versions[i].ver_minor == 0)) { break; } if ((versions[i].ver_major == ver_major) && (versions[i].ver_minor == ver_minor)) { return (VGEN_SUCCESS); } i++; } return (VGEN_FAILURE); } /* * Given a version, return VGEN_SUCCESS if a lower version is supported. */ static int vgen_next_version(vgen_ldc_t *ldcp, vgen_ver_t *verp) { vgen_ver_t *versions = ldcp->vgen_versions; int i = 0; while (i < VGEN_NUM_VER) { if ((versions[i].ver_major == 0) && (versions[i].ver_minor == 0)) { break; } /* * if we support a lower minor version within the same major * version, or if we support a lower major version, * update the verp parameter with this lower version and * return success. */ if (((versions[i].ver_major == verp->ver_major) && (versions[i].ver_minor < verp->ver_minor)) || (versions[i].ver_major < verp->ver_major)) { verp->ver_major = versions[i].ver_major; verp->ver_minor = versions[i].ver_minor; return (VGEN_SUCCESS); } i++; } return (VGEN_FAILURE); } /* * wrapper routine to send the given message over ldc using ldc_write(). */ static int vgen_sendmsg(vgen_ldc_t *ldcp, caddr_t msg, size_t msglen, boolean_t caller_holds_lock) { int rv; size_t len; uint32_t retries = 0; vgen_t *vgenp = LDC_TO_VGEN(ldcp); len = msglen; if ((len == 0) || (msg == NULL)) return (VGEN_FAILURE); if (!caller_holds_lock) { mutex_enter(&ldcp->wrlock); } do { len = msglen; rv = ldc_write(ldcp->ldc_handle, (caddr_t)msg, &len); if (retries++ >= vgen_ldcwr_retries) break; } while (rv == EWOULDBLOCK); if (!caller_holds_lock) { mutex_exit(&ldcp->wrlock); } if (rv != 0) { DWARN(vgenp, ldcp, "ldc_write failed: rv(%d)\n", rv, msglen); return (rv); } if (len != msglen) { DWARN(vgenp, ldcp, "ldc_write failed: rv(%d) msglen (%d)\n", rv, msglen); return (VGEN_FAILURE); } return (VGEN_SUCCESS); } /* send version negotiate message to the peer over ldc */ static int vgen_send_version_negotiate(vgen_ldc_t *ldcp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); vio_ver_msg_t vermsg; vio_msg_tag_t *tagp = &vermsg.tag; int rv; bzero(&vermsg, sizeof (vermsg)); tagp->vio_msgtype = VIO_TYPE_CTRL; tagp->vio_subtype = VIO_SUBTYPE_INFO; tagp->vio_subtype_env = VIO_VER_INFO; tagp->vio_sid = ldcp->local_sid; /* get version msg payload from ldcp->local */ vermsg.ver_major = ldcp->local_hparams.ver_major; vermsg.ver_minor = ldcp->local_hparams.ver_minor; vermsg.dev_class = ldcp->local_hparams.dev_class; rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (vermsg), B_FALSE); if (rv != VGEN_SUCCESS) { DWARN(vgenp, ldcp, "vgen_sendmsg failed\n"); return (rv); } ldcp->hstate |= VER_INFO_SENT; DBG2(vgenp, ldcp, "VER_INFO_SENT ver(%d,%d)\n", vermsg.ver_major, vermsg.ver_minor); return (VGEN_SUCCESS); } /* send attr info message to the peer over ldc */ static int vgen_send_attr_info(vgen_ldc_t *ldcp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); vnet_attr_msg_t attrmsg; vio_msg_tag_t *tagp = &attrmsg.tag; int rv; bzero(&attrmsg, sizeof (attrmsg)); tagp->vio_msgtype = VIO_TYPE_CTRL; tagp->vio_subtype = VIO_SUBTYPE_INFO; tagp->vio_subtype_env = VIO_ATTR_INFO; tagp->vio_sid = ldcp->local_sid; /* get attr msg payload from ldcp->local */ attrmsg.mtu = ldcp->local_hparams.mtu; attrmsg.addr = ldcp->local_hparams.addr; attrmsg.addr_type = ldcp->local_hparams.addr_type; attrmsg.xfer_mode = ldcp->local_hparams.xfer_mode; attrmsg.ack_freq = ldcp->local_hparams.ack_freq; rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (attrmsg), B_FALSE); if (rv != VGEN_SUCCESS) { DWARN(vgenp, ldcp, "vgen_sendmsg failed\n"); return (rv); } ldcp->hstate |= ATTR_INFO_SENT; DBG2(vgenp, ldcp, "ATTR_INFO_SENT\n"); return (VGEN_SUCCESS); } /* send descriptor ring register message to the peer over ldc */ static int vgen_send_dring_reg(vgen_ldc_t *ldcp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); vio_dring_reg_msg_t msg; vio_msg_tag_t *tagp = &msg.tag; int rv; bzero(&msg, sizeof (msg)); tagp->vio_msgtype = VIO_TYPE_CTRL; tagp->vio_subtype = VIO_SUBTYPE_INFO; tagp->vio_subtype_env = VIO_DRING_REG; tagp->vio_sid = ldcp->local_sid; /* get dring info msg payload from ldcp->local */ bcopy(&(ldcp->local_hparams.dring_cookie), (msg.cookie), sizeof (ldc_mem_cookie_t)); msg.ncookies = ldcp->local_hparams.num_dcookies; msg.num_descriptors = ldcp->local_hparams.num_desc; msg.descriptor_size = ldcp->local_hparams.desc_size; /* * dring_ident is set to 0. After mapping the dring, peer sets this * value and sends it in the ack, which is saved in * vgen_handle_dring_reg(). */ msg.dring_ident = 0; rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (msg), B_FALSE); if (rv != VGEN_SUCCESS) { DWARN(vgenp, ldcp, "vgen_sendmsg failed\n"); return (rv); } ldcp->hstate |= DRING_INFO_SENT; DBG2(vgenp, ldcp, "DRING_INFO_SENT \n"); return (VGEN_SUCCESS); } static int vgen_send_rdx_info(vgen_ldc_t *ldcp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); vio_rdx_msg_t rdxmsg; vio_msg_tag_t *tagp = &rdxmsg.tag; int rv; bzero(&rdxmsg, sizeof (rdxmsg)); tagp->vio_msgtype = VIO_TYPE_CTRL; tagp->vio_subtype = VIO_SUBTYPE_INFO; tagp->vio_subtype_env = VIO_RDX; tagp->vio_sid = ldcp->local_sid; rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (rdxmsg), B_FALSE); if (rv != VGEN_SUCCESS) { DWARN(vgenp, ldcp, "vgen_sendmsg failed\n"); return (rv); } ldcp->hstate |= RDX_INFO_SENT; DBG2(vgenp, ldcp, "RDX_INFO_SENT\n"); return (VGEN_SUCCESS); } /* send descriptor ring data message to the peer over ldc */ static int vgen_send_dring_data(vgen_ldc_t *ldcp, uint32_t start, int32_t end) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); vio_dring_msg_t dringmsg, *msgp = &dringmsg; vio_msg_tag_t *tagp = &msgp->tag; vgen_stats_t *statsp = &ldcp->stats; int rv; bzero(msgp, sizeof (*msgp)); tagp->vio_msgtype = VIO_TYPE_DATA; tagp->vio_subtype = VIO_SUBTYPE_INFO; tagp->vio_subtype_env = VIO_DRING_DATA; tagp->vio_sid = ldcp->local_sid; msgp->seq_num = ldcp->next_txseq; msgp->dring_ident = ldcp->local_hparams.dring_ident; msgp->start_idx = start; msgp->end_idx = end; rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (dringmsg), B_TRUE); if (rv != VGEN_SUCCESS) { DWARN(vgenp, ldcp, "vgen_sendmsg failed\n"); return (rv); } ldcp->next_txseq++; statsp->dring_data_msgs++; DBG2(vgenp, ldcp, "DRING_DATA_SENT \n"); return (VGEN_SUCCESS); } /* send multicast addr info message to vsw */ static int vgen_send_mcast_info(vgen_ldc_t *ldcp) { vnet_mcast_msg_t mcastmsg; vnet_mcast_msg_t *msgp; vio_msg_tag_t *tagp; vgen_t *vgenp; struct ether_addr *mca; int rv; int i; uint32_t size; uint32_t mccount; uint32_t n; msgp = &mcastmsg; tagp = &msgp->tag; vgenp = LDC_TO_VGEN(ldcp); mccount = vgenp->mccount; i = 0; do { tagp->vio_msgtype = VIO_TYPE_CTRL; tagp->vio_subtype = VIO_SUBTYPE_INFO; tagp->vio_subtype_env = VNET_MCAST_INFO; tagp->vio_sid = ldcp->local_sid; n = ((mccount >= VNET_NUM_MCAST) ? VNET_NUM_MCAST : mccount); size = n * sizeof (struct ether_addr); mca = &(vgenp->mctab[i]); bcopy(mca, (msgp->mca), size); msgp->set = B_TRUE; msgp->count = n; rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (*msgp), B_FALSE); if (rv != VGEN_SUCCESS) { DWARN(vgenp, ldcp, "vgen_sendmsg err(%d)\n", rv); return (rv); } mccount -= n; i += n; } while (mccount); return (VGEN_SUCCESS); } /* Initiate Phase 2 of handshake */ static int vgen_handshake_phase2(vgen_ldc_t *ldcp) { int rv; uint32_t ncookies = 0; vgen_t *vgenp = LDC_TO_VGEN(ldcp); #ifdef DEBUG if (vgen_hdbg & HDBG_OUT_STATE) { /* simulate out of state condition */ vgen_hdbg &= ~(HDBG_OUT_STATE); rv = vgen_send_rdx_info(ldcp); return (rv); } if (vgen_hdbg & HDBG_TIMEOUT) { /* simulate timeout condition */ vgen_hdbg &= ~(HDBG_TIMEOUT); return (VGEN_SUCCESS); } #endif rv = vgen_send_attr_info(ldcp); if (rv != VGEN_SUCCESS) { return (rv); } /* Bind descriptor ring to the channel */ if (ldcp->num_txdcookies == 0) { rv = ldc_mem_dring_bind(ldcp->ldc_handle, ldcp->tx_dhandle, LDC_SHADOW_MAP, LDC_MEM_RW, &ldcp->tx_dcookie, &ncookies); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_mem_dring_bind failed " "rv(%x)\n", rv); return (rv); } ASSERT(ncookies == 1); ldcp->num_txdcookies = ncookies; } /* update local dring_info params */ bcopy(&(ldcp->tx_dcookie), &(ldcp->local_hparams.dring_cookie), sizeof (ldc_mem_cookie_t)); ldcp->local_hparams.num_dcookies = ldcp->num_txdcookies; ldcp->local_hparams.num_desc = ldcp->num_txds; ldcp->local_hparams.desc_size = sizeof (vnet_public_desc_t); rv = vgen_send_dring_reg(ldcp); if (rv != VGEN_SUCCESS) { return (rv); } return (VGEN_SUCCESS); } /* * This function resets the handshake phase to VH_PHASE0(pre-handshake phase). * This can happen after a channel comes up (status: LDC_UP) or * when handshake gets terminated due to various conditions. */ static void vgen_reset_hphase(vgen_ldc_t *ldcp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); ldc_status_t istatus; int rv; DBG1(vgenp, ldcp, "enter\n"); /* reset hstate and hphase */ ldcp->hstate = 0; ldcp->hphase = VH_PHASE0; /* * Save the id of pending handshake timer in cancel_htid. * This will be checked in vgen_ldc_cb() and the handshake timer will * be cancelled after releasing cblock. */ if (ldcp->htid) { ldcp->cancel_htid = ldcp->htid; ldcp->htid = 0; } if (ldcp->local_hparams.dring_ready) { ldcp->local_hparams.dring_ready = B_FALSE; } /* Unbind tx descriptor ring from the channel */ if (ldcp->num_txdcookies) { rv = ldc_mem_dring_unbind(ldcp->tx_dhandle); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_mem_dring_unbind failed\n"); } ldcp->num_txdcookies = 0; } if (ldcp->peer_hparams.dring_ready) { ldcp->peer_hparams.dring_ready = B_FALSE; /* Unmap peer's dring */ (void) ldc_mem_dring_unmap(ldcp->rx_dhandle); vgen_clobber_rxds(ldcp); } vgen_clobber_tbufs(ldcp); /* * clear local handshake params and initialize. */ bzero(&(ldcp->local_hparams), sizeof (ldcp->local_hparams)); /* set version to the highest version supported */ ldcp->local_hparams.ver_major = ldcp->vgen_versions[0].ver_major; ldcp->local_hparams.ver_minor = ldcp->vgen_versions[0].ver_minor; ldcp->local_hparams.dev_class = VDEV_NETWORK; /* set attr_info params */ ldcp->local_hparams.mtu = ETHERMAX; ldcp->local_hparams.addr = vnet_macaddr_strtoul(vgenp->macaddr); ldcp->local_hparams.addr_type = ADDR_TYPE_MAC; ldcp->local_hparams.xfer_mode = VIO_DRING_MODE; ldcp->local_hparams.ack_freq = 0; /* don't need acks */ /* * Note: dring is created, but not bound yet. * local dring_info params will be updated when we bind the dring in * vgen_handshake_phase2(). * dring_ident is set to 0. After mapping the dring, peer sets this * value and sends it in the ack, which is saved in * vgen_handle_dring_reg(). */ ldcp->local_hparams.dring_ident = 0; /* clear peer_hparams */ bzero(&(ldcp->peer_hparams), sizeof (ldcp->peer_hparams)); /* reset the channel if required */ if (ldcp->need_ldc_reset) { DWARN(vgenp, ldcp, "Doing Channel Reset...\n"); ldcp->need_ldc_reset = B_FALSE; (void) ldc_down(ldcp->ldc_handle); (void) ldc_status(ldcp->ldc_handle, &istatus); DBG2(vgenp, ldcp, "Reset Done,ldc_status(%x)\n", istatus); ldcp->ldc_status = istatus; /* clear sids */ ldcp->local_sid = 0; ldcp->peer_sid = 0; /* try to bring the channel up */ rv = ldc_up(ldcp->ldc_handle); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_up err rv(%d)\n", rv); } if (ldc_status(ldcp->ldc_handle, &istatus) != 0) { DWARN(vgenp, ldcp, "ldc_status err\n"); } else { ldcp->ldc_status = istatus; } } } /* wrapper function for vgen_reset_hphase */ static void vgen_handshake_reset(vgen_ldc_t *ldcp) { ASSERT(MUTEX_HELD(&ldcp->cblock)); mutex_enter(&ldcp->rxlock); mutex_enter(&ldcp->wrlock); mutex_enter(&ldcp->txlock); mutex_enter(&ldcp->tclock); vgen_reset_hphase(ldcp); mutex_exit(&ldcp->tclock); mutex_exit(&ldcp->txlock); mutex_exit(&ldcp->wrlock); mutex_exit(&ldcp->rxlock); } /* * Initiate handshake with the peer by sending various messages * based on the handshake-phase that the channel is currently in. */ static void vgen_handshake(vgen_ldc_t *ldcp) { uint32_t hphase = ldcp->hphase; vgen_t *vgenp = LDC_TO_VGEN(ldcp); ldc_status_t istatus; int rv = 0; switch (hphase) { case VH_PHASE1: /* * start timer, for entire handshake process, turn this timer * off if all phases of handshake complete successfully and * hphase goes to VH_DONE(below) or * vgen_reset_hphase() gets called or * channel is reset due to errors or * vgen_ldc_uninit() is invoked(vgen_stop). */ ldcp->htid = timeout(vgen_hwatchdog, (caddr_t)ldcp, drv_usectohz(vgen_hwd_interval * MICROSEC)); /* Phase 1 involves negotiating the version */ rv = vgen_send_version_negotiate(ldcp); break; case VH_PHASE2: rv = vgen_handshake_phase2(ldcp); break; case VH_PHASE3: rv = vgen_send_rdx_info(ldcp); break; case VH_DONE: /* * Save the id of pending handshake timer in cancel_htid. * This will be checked in vgen_ldc_cb() and the handshake * timer will be cancelled after releasing cblock. */ if (ldcp->htid) { ldcp->cancel_htid = ldcp->htid; ldcp->htid = 0; } ldcp->hretries = 0; DBG1(vgenp, ldcp, "Handshake Done\n"); if (ldcp->portp == vgenp->vsw_portp) { /* * If this channel(port) is connected to vsw, * need to sync multicast table with vsw. */ mutex_exit(&ldcp->cblock); mutex_enter(&vgenp->lock); rv = vgen_send_mcast_info(ldcp); mutex_exit(&vgenp->lock); mutex_enter(&ldcp->cblock); if (rv != VGEN_SUCCESS) break; } /* * Check if mac layer should be notified to restart * transmissions. This can happen if the channel got * reset and vgen_clobber_tbufs() is called, while * need_resched is set. */ mutex_enter(&ldcp->tclock); if (ldcp->need_resched) { ldcp->need_resched = B_FALSE; vnet_tx_update(vgenp->vnetp); } mutex_exit(&ldcp->tclock); break; default: break; } if (rv == ECONNRESET) { if (ldc_status(ldcp->ldc_handle, &istatus) != 0) { DWARN(vgenp, ldcp, "ldc_status err\n"); } else { ldcp->ldc_status = istatus; } vgen_handle_evt_reset(ldcp, B_FALSE); } else if (rv) { vgen_handshake_reset(ldcp); } } /* * Check if the current handshake phase has completed successfully and * return the status. */ static int vgen_handshake_done(vgen_ldc_t *ldcp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); uint32_t hphase = ldcp->hphase; int status = 0; switch (hphase) { case VH_PHASE1: /* * Phase1 is done, if version negotiation * completed successfully. */ status = ((ldcp->hstate & VER_NEGOTIATED) == VER_NEGOTIATED); break; case VH_PHASE2: /* * Phase 2 is done, if attr info and dring info * have been exchanged successfully. */ status = (((ldcp->hstate & ATTR_INFO_EXCHANGED) == ATTR_INFO_EXCHANGED) && ((ldcp->hstate & DRING_INFO_EXCHANGED) == DRING_INFO_EXCHANGED)); break; case VH_PHASE3: /* Phase 3 is done, if rdx msg has been exchanged */ status = ((ldcp->hstate & RDX_EXCHANGED) == RDX_EXCHANGED); break; default: break; } if (status == 0) { return (VGEN_FAILURE); } DBG2(vgenp, ldcp, "PHASE(%d)\n", hphase); return (VGEN_SUCCESS); } /* retry handshake on failure */ static void vgen_handshake_retry(vgen_ldc_t *ldcp) { /* reset handshake phase */ vgen_handshake_reset(ldcp); /* handshake retry is specified and the channel is UP */ if (vgen_max_hretries && (ldcp->ldc_status == LDC_UP)) { if (ldcp->hretries++ < vgen_max_hretries) { ldcp->local_sid = ddi_get_lbolt(); vgen_handshake(vh_nextphase(ldcp)); } } } /* * Handle a version info msg from the peer or an ACK/NACK from the peer * to a version info msg that we sent. */ static int vgen_handle_version_negotiate(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { vgen_t *vgenp; vio_ver_msg_t *vermsg = (vio_ver_msg_t *)tagp; int ack = 0; int failed = 0; int idx; vgen_ver_t *versions = ldcp->vgen_versions; int rv = 0; vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); switch (tagp->vio_subtype) { case VIO_SUBTYPE_INFO: /* Cache sid of peer if this is the first time */ if (ldcp->peer_sid == 0) { DBG2(vgenp, ldcp, "Caching peer_sid(%x)\n", tagp->vio_sid); ldcp->peer_sid = tagp->vio_sid; } if (ldcp->hphase != VH_PHASE1) { /* * If we are not already in VH_PHASE1, reset to * pre-handshake state, and initiate handshake * to the peer too. */ vgen_handshake_reset(ldcp); vgen_handshake(vh_nextphase(ldcp)); } ldcp->hstate |= VER_INFO_RCVD; /* save peer's requested values */ ldcp->peer_hparams.ver_major = vermsg->ver_major; ldcp->peer_hparams.ver_minor = vermsg->ver_minor; ldcp->peer_hparams.dev_class = vermsg->dev_class; if ((vermsg->dev_class != VDEV_NETWORK) && (vermsg->dev_class != VDEV_NETWORK_SWITCH)) { /* unsupported dev_class, send NACK */ DWARN(vgenp, ldcp, "Version Negotiation Failed\n"); tagp->vio_subtype = VIO_SUBTYPE_NACK; tagp->vio_sid = ldcp->local_sid; /* send reply msg back to peer */ rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (*vermsg), B_FALSE); if (rv != VGEN_SUCCESS) { return (rv); } return (VGEN_FAILURE); } DBG2(vgenp, ldcp, "VER_INFO_RCVD, ver(%d,%d)\n", vermsg->ver_major, vermsg->ver_minor); idx = 0; for (;;) { if (vermsg->ver_major > versions[idx].ver_major) { /* nack with next lower version */ tagp->vio_subtype = VIO_SUBTYPE_NACK; vermsg->ver_major = versions[idx].ver_major; vermsg->ver_minor = versions[idx].ver_minor; break; } if (vermsg->ver_major == versions[idx].ver_major) { /* major version match - ACK version */ tagp->vio_subtype = VIO_SUBTYPE_ACK; ack = 1; /* * lower minor version to the one this endpt * supports, if necessary */ if (vermsg->ver_minor > versions[idx].ver_minor) { vermsg->ver_minor = versions[idx].ver_minor; ldcp->peer_hparams.ver_minor = versions[idx].ver_minor; } break; } idx++; if (idx == VGEN_NUM_VER) { /* no version match - send NACK */ tagp->vio_subtype = VIO_SUBTYPE_NACK; vermsg->ver_major = 0; vermsg->ver_minor = 0; failed = 1; break; } } tagp->vio_sid = ldcp->local_sid; /* send reply msg back to peer */ rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (*vermsg), B_FALSE); if (rv != VGEN_SUCCESS) { return (rv); } if (ack) { ldcp->hstate |= VER_ACK_SENT; DBG2(vgenp, ldcp, "VER_ACK_SENT, ver(%d,%d) \n", vermsg->ver_major, vermsg->ver_minor); } if (failed) { DWARN(vgenp, ldcp, "Negotiation Failed\n"); return (VGEN_FAILURE); } if (vgen_handshake_done(ldcp) == VGEN_SUCCESS) { /* VER_ACK_SENT and VER_ACK_RCVD */ /* local and peer versions match? */ ASSERT((ldcp->local_hparams.ver_major == ldcp->peer_hparams.ver_major) && (ldcp->local_hparams.ver_minor == ldcp->peer_hparams.ver_minor)); /* move to the next phase */ vgen_handshake(vh_nextphase(ldcp)); } break; case VIO_SUBTYPE_ACK: if (ldcp->hphase != VH_PHASE1) { /* This should not happen. */ DWARN(vgenp, ldcp, "Invalid Phase(%u)\n", ldcp->hphase); return (VGEN_FAILURE); } /* SUCCESS - we have agreed on a version */ ldcp->local_hparams.ver_major = vermsg->ver_major; ldcp->local_hparams.ver_minor = vermsg->ver_minor; ldcp->hstate |= VER_ACK_RCVD; DBG2(vgenp, ldcp, "VER_ACK_RCVD, ver(%d,%d) \n", vermsg->ver_major, vermsg->ver_minor); if (vgen_handshake_done(ldcp) == VGEN_SUCCESS) { /* VER_ACK_SENT and VER_ACK_RCVD */ /* local and peer versions match? */ ASSERT((ldcp->local_hparams.ver_major == ldcp->peer_hparams.ver_major) && (ldcp->local_hparams.ver_minor == ldcp->peer_hparams.ver_minor)); /* move to the next phase */ vgen_handshake(vh_nextphase(ldcp)); } break; case VIO_SUBTYPE_NACK: if (ldcp->hphase != VH_PHASE1) { /* This should not happen. */ DWARN(vgenp, ldcp, "VER_NACK_RCVD Invalid " "Phase(%u)\n", ldcp->hphase); return (VGEN_FAILURE); } DBG2(vgenp, ldcp, "VER_NACK_RCVD next ver(%d,%d)\n", vermsg->ver_major, vermsg->ver_minor); /* check if version in NACK is zero */ if (vermsg->ver_major == 0 && vermsg->ver_minor == 0) { /* * Version Negotiation has failed. */ DWARN(vgenp, ldcp, "Version Negotiation Failed\n"); return (VGEN_FAILURE); } idx = 0; for (;;) { if (vermsg->ver_major > versions[idx].ver_major) { /* select next lower version */ ldcp->local_hparams.ver_major = versions[idx].ver_major; ldcp->local_hparams.ver_minor = versions[idx].ver_minor; break; } if (vermsg->ver_major == versions[idx].ver_major) { /* major version match */ ldcp->local_hparams.ver_major = versions[idx].ver_major; ldcp->local_hparams.ver_minor = versions[idx].ver_minor; break; } idx++; if (idx == VGEN_NUM_VER) { /* * no version match. * Version Negotiation has failed. */ DWARN(vgenp, ldcp, "Version Negotiation Failed\n"); return (VGEN_FAILURE); } } rv = vgen_send_version_negotiate(ldcp); if (rv != VGEN_SUCCESS) { return (rv); } break; } DBG1(vgenp, ldcp, "exit\n"); return (VGEN_SUCCESS); } /* Check if the attributes are supported */ static int vgen_check_attr_info(vgen_ldc_t *ldcp, vnet_attr_msg_t *msg) { _NOTE(ARGUNUSED(ldcp)) /* * currently, we support these attr values: * mtu of ethernet, addr_type of mac, xfer_mode of * ldc shared memory, ack_freq of 0 (data is acked if * the ack bit is set in the descriptor) and the address should * match the address in the port node. */ if ((msg->mtu != ETHERMAX) || (msg->addr_type != ADDR_TYPE_MAC) || (msg->xfer_mode != VIO_DRING_MODE) || (msg->ack_freq > 64)) { return (VGEN_FAILURE); } return (VGEN_SUCCESS); } /* * Handle an attribute info msg from the peer or an ACK/NACK from the peer * to an attr info msg that we sent. */ static int vgen_handle_attr_info(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); vnet_attr_msg_t *attrmsg = (vnet_attr_msg_t *)tagp; int ack = 0; int rv = 0; DBG1(vgenp, ldcp, "enter\n"); if (ldcp->hphase != VH_PHASE2) { DWARN(vgenp, ldcp, "Rcvd ATTR_INFO subtype(%d)," " Invalid Phase(%u)\n", tagp->vio_subtype, ldcp->hphase); return (VGEN_FAILURE); } switch (tagp->vio_subtype) { case VIO_SUBTYPE_INFO: DBG2(vgenp, ldcp, "ATTR_INFO_RCVD \n"); ldcp->hstate |= ATTR_INFO_RCVD; /* save peer's values */ ldcp->peer_hparams.mtu = attrmsg->mtu; ldcp->peer_hparams.addr = attrmsg->addr; ldcp->peer_hparams.addr_type = attrmsg->addr_type; ldcp->peer_hparams.xfer_mode = attrmsg->xfer_mode; ldcp->peer_hparams.ack_freq = attrmsg->ack_freq; if (vgen_check_attr_info(ldcp, attrmsg) == VGEN_FAILURE) { /* unsupported attr, send NACK */ tagp->vio_subtype = VIO_SUBTYPE_NACK; } else { ack = 1; tagp->vio_subtype = VIO_SUBTYPE_ACK; } tagp->vio_sid = ldcp->local_sid; /* send reply msg back to peer */ rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (*attrmsg), B_FALSE); if (rv != VGEN_SUCCESS) { return (rv); } if (ack) { ldcp->hstate |= ATTR_ACK_SENT; DBG2(vgenp, ldcp, "ATTR_ACK_SENT \n"); } else { /* failed */ DWARN(vgenp, ldcp, "ATTR_NACK_SENT \n"); return (VGEN_FAILURE); } if (vgen_handshake_done(ldcp) == VGEN_SUCCESS) { vgen_handshake(vh_nextphase(ldcp)); } break; case VIO_SUBTYPE_ACK: ldcp->hstate |= ATTR_ACK_RCVD; DBG2(vgenp, ldcp, "ATTR_ACK_RCVD \n"); if (vgen_handshake_done(ldcp) == VGEN_SUCCESS) { vgen_handshake(vh_nextphase(ldcp)); } break; case VIO_SUBTYPE_NACK: DBG2(vgenp, ldcp, "ATTR_NACK_RCVD \n"); return (VGEN_FAILURE); } DBG1(vgenp, ldcp, "exit\n"); return (VGEN_SUCCESS); } /* Check if the dring info msg is ok */ static int vgen_check_dring_reg(vio_dring_reg_msg_t *msg) { /* check if msg contents are ok */ if ((msg->num_descriptors < 128) || (msg->descriptor_size < sizeof (vnet_public_desc_t))) { return (VGEN_FAILURE); } return (VGEN_SUCCESS); } /* * Handle a descriptor ring register msg from the peer or an ACK/NACK from * the peer to a dring register msg that we sent. */ static int vgen_handle_dring_reg(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { vio_dring_reg_msg_t *msg = (vio_dring_reg_msg_t *)tagp; ldc_mem_cookie_t dcookie; vgen_t *vgenp = LDC_TO_VGEN(ldcp); int ack = 0; int rv = 0; DBG1(vgenp, ldcp, "enter\n"); if (ldcp->hphase < VH_PHASE2) { /* dring_info can be rcvd in any of the phases after Phase1 */ DWARN(vgenp, ldcp, "Rcvd DRING_INFO Subtype (%d), Invalid Phase(%u)\n", tagp->vio_subtype, ldcp->hphase); return (VGEN_FAILURE); } switch (tagp->vio_subtype) { case VIO_SUBTYPE_INFO: DBG2(vgenp, ldcp, "DRING_INFO_RCVD \n"); ldcp->hstate |= DRING_INFO_RCVD; bcopy((msg->cookie), &dcookie, sizeof (dcookie)); ASSERT(msg->ncookies == 1); if (vgen_check_dring_reg(msg) == VGEN_SUCCESS) { /* * verified dring info msg to be ok, * now try to map the remote dring. */ rv = vgen_init_rxds(ldcp, msg->num_descriptors, msg->descriptor_size, &dcookie, msg->ncookies); if (rv == DDI_SUCCESS) { /* now we can ack the peer */ ack = 1; } } if (ack == 0) { /* failed, send NACK */ tagp->vio_subtype = VIO_SUBTYPE_NACK; } else { if (!(ldcp->peer_hparams.dring_ready)) { /* save peer's dring_info values */ bcopy(&dcookie, &(ldcp->peer_hparams.dring_cookie), sizeof (dcookie)); ldcp->peer_hparams.num_desc = msg->num_descriptors; ldcp->peer_hparams.desc_size = msg->descriptor_size; ldcp->peer_hparams.num_dcookies = msg->ncookies; /* set dring_ident for the peer */ ldcp->peer_hparams.dring_ident = (uint64_t)ldcp->rxdp; /* return the dring_ident in ack msg */ msg->dring_ident = (uint64_t)ldcp->rxdp; ldcp->peer_hparams.dring_ready = B_TRUE; } tagp->vio_subtype = VIO_SUBTYPE_ACK; } tagp->vio_sid = ldcp->local_sid; /* send reply msg back to peer */ rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (*msg), B_FALSE); if (rv != VGEN_SUCCESS) { return (rv); } if (ack) { ldcp->hstate |= DRING_ACK_SENT; DBG2(vgenp, ldcp, "DRING_ACK_SENT"); } else { DWARN(vgenp, ldcp, "DRING_NACK_SENT"); return (VGEN_FAILURE); } if (vgen_handshake_done(ldcp) == VGEN_SUCCESS) { vgen_handshake(vh_nextphase(ldcp)); } break; case VIO_SUBTYPE_ACK: ldcp->hstate |= DRING_ACK_RCVD; DBG2(vgenp, ldcp, "DRING_ACK_RCVD"); if (!(ldcp->local_hparams.dring_ready)) { /* local dring is now ready */ ldcp->local_hparams.dring_ready = B_TRUE; /* save dring_ident acked by peer */ ldcp->local_hparams.dring_ident = msg->dring_ident; } if (vgen_handshake_done(ldcp) == VGEN_SUCCESS) { vgen_handshake(vh_nextphase(ldcp)); } break; case VIO_SUBTYPE_NACK: DBG2(vgenp, ldcp, "DRING_NACK_RCVD"); return (VGEN_FAILURE); } DBG1(vgenp, ldcp, "exit\n"); return (VGEN_SUCCESS); } /* * Handle a rdx info msg from the peer or an ACK/NACK * from the peer to a rdx info msg that we sent. */ static int vgen_handle_rdx_info(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { int rv = 0; vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); if (ldcp->hphase != VH_PHASE3) { DWARN(vgenp, ldcp, "Rcvd RDX_INFO Subtype (%d), Invalid Phase(%u)\n", tagp->vio_subtype, ldcp->hphase); return (VGEN_FAILURE); } switch (tagp->vio_subtype) { case VIO_SUBTYPE_INFO: DBG2(vgenp, ldcp, "RDX_INFO_RCVD \n"); ldcp->hstate |= RDX_INFO_RCVD; tagp->vio_subtype = VIO_SUBTYPE_ACK; tagp->vio_sid = ldcp->local_sid; /* send reply msg back to peer */ rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (vio_rdx_msg_t), B_FALSE); if (rv != VGEN_SUCCESS) { return (rv); } ldcp->hstate |= RDX_ACK_SENT; DBG2(vgenp, ldcp, "RDX_ACK_SENT \n"); if (vgen_handshake_done(ldcp) == VGEN_SUCCESS) { vgen_handshake(vh_nextphase(ldcp)); } break; case VIO_SUBTYPE_ACK: ldcp->hstate |= RDX_ACK_RCVD; DBG2(vgenp, ldcp, "RDX_ACK_RCVD \n"); if (vgen_handshake_done(ldcp) == VGEN_SUCCESS) { vgen_handshake(vh_nextphase(ldcp)); } break; case VIO_SUBTYPE_NACK: DBG2(vgenp, ldcp, "RDX_NACK_RCVD \n"); return (VGEN_FAILURE); } DBG1(vgenp, ldcp, "exit\n"); return (VGEN_SUCCESS); } /* Handle ACK/NACK from vsw to a set multicast msg that we sent */ static int vgen_handle_mcast_info(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); vnet_mcast_msg_t *msgp = (vnet_mcast_msg_t *)tagp; struct ether_addr *addrp; int count; int i; DBG1(vgenp, ldcp, "enter\n"); switch (tagp->vio_subtype) { case VIO_SUBTYPE_INFO: /* vnet shouldn't recv set mcast msg, only vsw handles it */ DWARN(vgenp, ldcp, "rcvd SET_MCAST_INFO \n"); break; case VIO_SUBTYPE_ACK: /* success adding/removing multicast addr */ DBG1(vgenp, ldcp, "rcvd SET_MCAST_ACK \n"); break; case VIO_SUBTYPE_NACK: DWARN(vgenp, ldcp, "rcvd SET_MCAST_NACK \n"); if (!(msgp->set)) { /* multicast remove request failed */ break; } /* multicast add request failed */ for (count = 0; count < msgp->count; count++) { addrp = &(msgp->mca[count]); /* delete address from the table */ for (i = 0; i < vgenp->mccount; i++) { if (ether_cmp(addrp, &(vgenp->mctab[i])) == 0) { if (vgenp->mccount > 1) { int t = vgenp->mccount - 1; vgenp->mctab[i] = vgenp->mctab[t]; } vgenp->mccount--; break; } } } break; } DBG1(vgenp, ldcp, "exit\n"); return (VGEN_SUCCESS); } /* handler for control messages received from the peer ldc end-point */ static int vgen_handle_ctrlmsg(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { int rv = 0; vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); switch (tagp->vio_subtype_env) { case VIO_VER_INFO: rv = vgen_handle_version_negotiate(ldcp, tagp); break; case VIO_ATTR_INFO: rv = vgen_handle_attr_info(ldcp, tagp); break; case VIO_DRING_REG: rv = vgen_handle_dring_reg(ldcp, tagp); break; case VIO_RDX: rv = vgen_handle_rdx_info(ldcp, tagp); break; case VNET_MCAST_INFO: rv = vgen_handle_mcast_info(ldcp, tagp); break; } DBG1(vgenp, ldcp, "exit rv(%d)\n", rv); return (rv); } /* handler for data messages received from the peer ldc end-point */ static int vgen_handle_datamsg(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { int rv = 0; vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); if (ldcp->hphase != VH_DONE) return (rv); switch (tagp->vio_subtype_env) { case VIO_DRING_DATA: rv = vgen_handle_dring_data(ldcp, tagp); break; default: break; } DBG1(vgenp, ldcp, "exit rv(%d)\n", rv); return (rv); } static int vgen_send_dring_ack(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp, uint32_t start, int32_t end, uint8_t pstate) { int rv = 0; vgen_t *vgenp = LDC_TO_VGEN(ldcp); vio_dring_msg_t *msgp = (vio_dring_msg_t *)tagp; tagp->vio_subtype = VIO_SUBTYPE_ACK; tagp->vio_sid = ldcp->local_sid; msgp->start_idx = start; msgp->end_idx = end; msgp->dring_process_state = pstate; rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (*msgp), B_FALSE); if (rv != VGEN_SUCCESS) { DWARN(vgenp, ldcp, "vgen_sendmsg failed\n"); } return (rv); } static int vgen_handle_dring_data(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { int rv = 0; vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); switch (tagp->vio_subtype) { case VIO_SUBTYPE_INFO: /* * To reduce the locking contention, release the * cblock here and re-acquire it once we are done * receiving packets. */ mutex_exit(&ldcp->cblock); mutex_enter(&ldcp->rxlock); rv = vgen_handle_dring_data_info(ldcp, tagp); mutex_exit(&ldcp->rxlock); mutex_enter(&ldcp->cblock); break; case VIO_SUBTYPE_ACK: rv = vgen_handle_dring_data_ack(ldcp, tagp); break; case VIO_SUBTYPE_NACK: rv = vgen_handle_dring_data_nack(ldcp, tagp); break; } DBG1(vgenp, ldcp, "exit rv(%d)\n", rv); return (rv); } static int vgen_handle_dring_data_info(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { uint32_t start; int32_t end; int rv = 0; vio_dring_msg_t *dringmsg = (vio_dring_msg_t *)tagp; vgen_t *vgenp = LDC_TO_VGEN(ldcp); #ifdef VGEN_HANDLE_LOST_PKTS vgen_stats_t *statsp = &ldcp->stats; uint32_t rxi; int n; #endif DBG1(vgenp, ldcp, "enter\n"); start = dringmsg->start_idx; end = dringmsg->end_idx; /* * received a data msg, which contains the start and end * indices of the descriptors within the rx ring holding data, * the seq_num of data packet corresponding to the start index, * and the dring_ident. * We can now read the contents of each of these descriptors * and gather data from it. */ DBG1(vgenp, ldcp, "INFO: start(%d), end(%d)\n", start, end); /* validate rx start and end indeces */ if (!(CHECK_RXI(start, ldcp)) || ((end != -1) && !(CHECK_RXI(end, ldcp)))) { DWARN(vgenp, ldcp, "Invalid Rx start(%d) or end(%d)\n", start, end); /* drop the message if invalid index */ return (rv); } /* validate dring_ident */ if (dringmsg->dring_ident != ldcp->peer_hparams.dring_ident) { DWARN(vgenp, ldcp, "Invalid dring ident 0x%x\n", dringmsg->dring_ident); /* invalid dring_ident, drop the msg */ return (rv); } #ifdef DEBUG if (vgen_trigger_rxlost) { /* drop this msg to simulate lost pkts for debugging */ vgen_trigger_rxlost = 0; return (rv); } #endif #ifdef VGEN_HANDLE_LOST_PKTS /* receive start index doesn't match expected index */ if (ldcp->next_rxi != start) { DWARN(vgenp, ldcp, "next_rxi(%d) != start(%d)\n", ldcp->next_rxi, start); /* calculate the number of pkts lost */ if (start >= ldcp->next_rxi) { n = start - ldcp->next_rxi; } else { n = ldcp->num_rxds - (ldcp->next_rxi - start); } /* * sequence number of dring data message * is less than the next sequence number that * is expected: * * drop the message and the corresponding packets. */ if (ldcp->next_rxseq > dringmsg->seq_num) { DWARN(vgenp, ldcp, "dropping pkts, expected " "rxseq(0x%lx) > recvd(0x%lx)\n", ldcp->next_rxseq, dringmsg->seq_num); /* * duplicate/multiple retransmissions from * sender?? drop this msg. */ return (rv); } /* * sequence number of dring data message * is greater than the next expected sequence number * * send a NACK back to the peer to indicate lost * packets. */ if (dringmsg->seq_num > ldcp->next_rxseq) { statsp->rx_lost_pkts += n; tagp->vio_subtype = VIO_SUBTYPE_NACK; tagp->vio_sid = ldcp->local_sid; /* indicate the range of lost descriptors */ dringmsg->start_idx = ldcp->next_rxi; rxi = start; DECR_RXI(rxi, ldcp); dringmsg->end_idx = rxi; /* dring ident is left unchanged */ rv = vgen_sendmsg(ldcp, (caddr_t)tagp, sizeof (*dringmsg), B_FALSE); if (rv != VGEN_SUCCESS) { DWARN(vgenp, ldcp, "vgen_sendmsg failed, stype:NACK\n"); return (rv); } #ifdef VGEN_REXMIT /* * stop further processing until peer * retransmits with the right index. * update next_rxseq expected. */ ldcp->next_rxseq += 1; return (rv); #else /* VGEN_REXMIT */ /* * treat this range of descrs/pkts as dropped * and set the new expected values for next_rxi * and next_rxseq. continue(below) to process * from the new start index. */ ldcp->next_rxi = start; ldcp->next_rxseq += 1; #endif /* VGEN_REXMIT */ } else if (dringmsg->seq_num == ldcp->next_rxseq) { /* * expected and received seqnums match, but * the descriptor indeces don't? * * restart handshake with peer. */ DWARN(vgenp, ldcp, "next_rxseq(0x%lx)==" "seq_num(0x%lx)\n", ldcp->next_rxseq, dringmsg->seq_num); } } else { /* expected and start dring indeces match */ if (dringmsg->seq_num != ldcp->next_rxseq) { /* seqnums don't match */ DWARN(vgenp, ldcp, "next_rxseq(0x%lx) != seq_num(0x%lx)\n", ldcp->next_rxseq, dringmsg->seq_num); } } #endif /* VGEN_HANDLE_LOST_PKTS */ /* Now receive messages */ rv = vgen_process_dring_data(ldcp, tagp); DBG1(vgenp, ldcp, "exit rv(%d)\n", rv); return (rv); } static int vgen_process_dring_data(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { boolean_t set_ack_start = B_FALSE; uint32_t start; uint32_t ack_end; uint32_t next_rxi; uint32_t rxi; int count = 0; int rv = 0; uint32_t retries = 0; vgen_stats_t *statsp; vnet_public_desc_t *rxdp; vio_dring_entry_hdr_t *hdrp; mblk_t *bp = NULL; mblk_t *bpt = NULL; uint32_t ack_start; uint32_t datalen; uint32_t ncookies; boolean_t rxd_err = B_FALSE; mblk_t *mp = NULL; size_t nbytes; boolean_t ack_needed = B_FALSE; size_t nread; uint64_t off = 0; struct ether_header *ehp; vio_dring_msg_t *dringmsg = (vio_dring_msg_t *)tagp; vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); statsp = &ldcp->stats; start = dringmsg->start_idx; /* * start processing the descriptors from the specified * start index, up to the index a descriptor is not ready * to be processed or we process the entire descriptor ring * and wrap around upto the start index. */ /* need to set the start index of descriptors to be ack'd */ set_ack_start = B_TRUE; /* index upto which we have ack'd */ ack_end = start; DECR_RXI(ack_end, ldcp); next_rxi = rxi = start; do { vgen_recv_retry: rv = ldc_mem_dring_acquire(ldcp->rx_dhandle, rxi, rxi); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_mem_dring_acquire() failed" " rv(%d)\n", rv); statsp->ierrors++; return (rv); } rxdp = &(ldcp->rxdp[rxi]); hdrp = &rxdp->hdr; if (hdrp->dstate != VIO_DESC_READY) { /* * Before waiting and retry here, queue * the messages that are received already. * This will help the soft interrupt to * send them up with less latency. */ if (bp != NULL) { DTRACE_PROBE1(vgen_rcv_msgs, int, count); vgen_ldc_queue_data(ldcp, bp, bpt); count = 0; bp = bpt = NULL; } /* * descriptor is not ready. * retry descriptor acquire, stop processing * after max # retries. */ if (retries == vgen_recv_retries) break; retries++; drv_usecwait(vgen_recv_delay); goto vgen_recv_retry; } retries = 0; if (set_ack_start) { /* * initialize the start index of the range * of descriptors to be ack'd. */ ack_start = rxi; set_ack_start = B_FALSE; } datalen = rxdp->nbytes; ncookies = rxdp->ncookies; if ((datalen < ETHERMIN) || (ncookies == 0) || (ncookies > MAX_COOKIES)) { rxd_err = B_TRUE; } else { /* * Try to allocate an mblk from the free pool * of recv mblks for the channel. * If this fails, use allocb(). */ nbytes = (VNET_IPALIGN + datalen + 7) & ~7; mp = vio_multipool_allocb(&ldcp->vmp, nbytes); if (!mp) { /* * The data buffer returned by * allocb(9F) is 8byte aligned. We * allocate extra 8 bytes to ensure * size is multiple of 8 bytes for * ldc_mem_copy(). */ statsp->rx_vio_allocb_fail++; mp = allocb(VNET_IPALIGN + datalen + 8, BPRI_MED); } } if ((rxd_err) || (mp == NULL)) { /* * rxd_err or allocb() failure, * drop this packet, get next. */ if (rxd_err) { statsp->ierrors++; rxd_err = B_FALSE; } else { statsp->rx_allocb_fail++; } ack_needed = hdrp->ack; /* set descriptor done bit */ hdrp->dstate = VIO_DESC_DONE; rv = ldc_mem_dring_release(ldcp->rx_dhandle, rxi, rxi); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_mem_dring_release err rv(%d)\n", rv); return (rv); } if (ack_needed) { ack_needed = B_FALSE; /* * sender needs ack for this packet, * ack pkts upto this index. */ ack_end = rxi; rv = vgen_send_dring_ack(ldcp, tagp, ack_start, ack_end, VIO_DP_ACTIVE); if (rv != VGEN_SUCCESS) { goto error_ret; } /* need to set new ack start index */ set_ack_start = B_TRUE; } goto vgen_next_rxi; } nread = nbytes; rv = ldc_mem_copy(ldcp->ldc_handle, (caddr_t)mp->b_rptr, off, &nread, rxdp->memcookie, ncookies, LDC_COPY_IN); /* if ldc_mem_copy() failed */ if (rv) { DWARN(vgenp, ldcp, "ldc_mem_copy err rv(%d)\n", rv); statsp->ierrors++; freemsg(mp); goto error_ret; } ack_needed = hdrp->ack; hdrp->dstate = VIO_DESC_DONE; rv = ldc_mem_dring_release(ldcp->rx_dhandle, rxi, rxi); if (rv != 0) { DWARN(vgenp, ldcp, "ldc_mem_dring_release err rv(%d)\n", rv); goto error_ret; } mp->b_rptr += VNET_IPALIGN; if (ack_needed) { ack_needed = B_FALSE; /* * sender needs ack for this packet, * ack pkts upto this index. */ ack_end = rxi; rv = vgen_send_dring_ack(ldcp, tagp, ack_start, ack_end, VIO_DP_ACTIVE); if (rv != VGEN_SUCCESS) { goto error_ret; } /* need to set new ack start index */ set_ack_start = B_TRUE; } if (nread != nbytes) { DWARN(vgenp, ldcp, "ldc_mem_copy nread(%lx), nbytes(%lx)\n", nread, nbytes); statsp->ierrors++; freemsg(mp); goto vgen_next_rxi; } /* point to the actual end of data */ mp->b_wptr = mp->b_rptr + datalen; /* update stats */ statsp->ipackets++; statsp->rbytes += datalen; ehp = (struct ether_header *)mp->b_rptr; if (IS_BROADCAST(ehp)) statsp->brdcstrcv++; else if (IS_MULTICAST(ehp)) statsp->multircv++; /* build a chain of received packets */ if (bp == NULL) { /* first pkt */ bp = mp; bpt = bp; bpt->b_next = NULL; } else { mp->b_next = NULL; bpt->b_next = mp; bpt = mp; } if (count++ > vgen_chain_len) { DTRACE_PROBE1(vgen_rcv_msgs, int, count); vgen_ldc_queue_data(ldcp, bp, bpt); count = 0; bp = bpt = NULL; } vgen_next_rxi: /* update end index of range of descrs to be ack'd */ ack_end = rxi; /* update the next index to be processed */ INCR_RXI(next_rxi, ldcp); if (next_rxi == start) { /* * processed the entire descriptor ring upto * the index at which we started. */ break; } rxi = next_rxi; _NOTE(CONSTCOND) } while (1); /* * send an ack message to peer indicating that we have stopped * processing descriptors. */ if (set_ack_start) { /* * We have ack'd upto some index and we have not * processed any descriptors beyond that index. * Use the last ack'd index as both the start and * end of range of descrs being ack'd. * Note: This results in acking the last index twice * and should be harmless. */ ack_start = ack_end; } rv = vgen_send_dring_ack(ldcp, tagp, ack_start, ack_end, VIO_DP_STOPPED); if (rv != VGEN_SUCCESS) { goto error_ret; } /* save new recv index and expected seqnum of next dring msg */ ldcp->next_rxi = next_rxi; ldcp->next_rxseq += 1; error_ret: /* queue the packets received so far */ if (bp != NULL) { DTRACE_PROBE1(vgen_rcv_msgs, int, count); vgen_ldc_queue_data(ldcp, bp, bpt); bp = bpt = NULL; } DBG1(vgenp, ldcp, "exit rv(%d)\n", rv); return (rv); } static int vgen_handle_dring_data_ack(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { int rv = 0; uint32_t start; int32_t end; uint32_t txi; boolean_t ready_txd = B_FALSE; vgen_stats_t *statsp; vgen_private_desc_t *tbufp; vnet_public_desc_t *txdp; vio_dring_entry_hdr_t *hdrp; vgen_t *vgenp = LDC_TO_VGEN(ldcp); vio_dring_msg_t *dringmsg = (vio_dring_msg_t *)tagp; DBG1(vgenp, ldcp, "enter\n"); start = dringmsg->start_idx; end = dringmsg->end_idx; statsp = &ldcp->stats; /* * received an ack corresponding to a specific descriptor for * which we had set the ACK bit in the descriptor (during * transmit). This enables us to reclaim descriptors. */ DBG2(vgenp, ldcp, "ACK: start(%d), end(%d)\n", start, end); /* validate start and end indeces in the tx ack msg */ if (!(CHECK_TXI(start, ldcp)) || !(CHECK_TXI(end, ldcp))) { /* drop the message if invalid index */ DWARN(vgenp, ldcp, "Invalid Tx ack start(%d) or end(%d)\n", start, end); return (rv); } /* validate dring_ident */ if (dringmsg->dring_ident != ldcp->local_hparams.dring_ident) { /* invalid dring_ident, drop the msg */ DWARN(vgenp, ldcp, "Invalid dring ident 0x%x\n", dringmsg->dring_ident); return (rv); } statsp->dring_data_acks++; /* reclaim descriptors that are done */ vgen_reclaim(ldcp); if (dringmsg->dring_process_state != VIO_DP_STOPPED) { /* * receiver continued processing descriptors after * sending us the ack. */ return (rv); } statsp->dring_stopped_acks++; /* receiver stopped processing descriptors */ mutex_enter(&ldcp->wrlock); mutex_enter(&ldcp->tclock); /* * determine if there are any pending tx descriptors * ready to be processed by the receiver(peer) and if so, * send a message to the peer to restart receiving. */ ready_txd = B_FALSE; /* * using the end index of the descriptor range for which * we received the ack, check if the next descriptor is * ready. */ txi = end; INCR_TXI(txi, ldcp); tbufp = &ldcp->tbufp[txi]; txdp = tbufp->descp; hdrp = &txdp->hdr; if (hdrp->dstate == VIO_DESC_READY) { ready_txd = B_TRUE; } else { /* * descr next to the end of ack'd descr range is not * ready. * starting from the current reclaim index, check * if any descriptor is ready. */ txi = ldcp->cur_tbufp - ldcp->tbufp; tbufp = &ldcp->tbufp[txi]; txdp = tbufp->descp; hdrp = &txdp->hdr; if (hdrp->dstate == VIO_DESC_READY) { ready_txd = B_TRUE; } } if (ready_txd) { /* * we have tx descriptor(s) ready to be * processed by the receiver. * send a message to the peer with the start index * of ready descriptors. */ rv = vgen_send_dring_data(ldcp, txi, -1); if (rv != VGEN_SUCCESS) { ldcp->resched_peer = B_TRUE; ldcp->resched_peer_txi = txi; mutex_exit(&ldcp->tclock); mutex_exit(&ldcp->wrlock); return (rv); } } else { /* * no ready tx descriptors. set the flag to send a * message to peer when tx descriptors are ready in * transmit routine. */ ldcp->resched_peer = B_TRUE; ldcp->resched_peer_txi = ldcp->cur_tbufp - ldcp->tbufp; } mutex_exit(&ldcp->tclock); mutex_exit(&ldcp->wrlock); DBG1(vgenp, ldcp, "exit rv(%d)\n", rv); return (rv); } static int vgen_handle_dring_data_nack(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { int rv = 0; uint32_t start; int32_t end; uint32_t txi; vnet_public_desc_t *txdp; vio_dring_entry_hdr_t *hdrp; vgen_t *vgenp = LDC_TO_VGEN(ldcp); vio_dring_msg_t *dringmsg = (vio_dring_msg_t *)tagp; #ifdef VGEN_REXMIT vgen_stats_t *statsp = &ldcp->stats; #endif DBG1(vgenp, ldcp, "enter\n"); start = dringmsg->start_idx; end = dringmsg->end_idx; /* * peer sent a NACK msg to indicate lost packets. * The start and end correspond to the range of descriptors * for which the peer didn't receive a dring data msg and so * didn't receive the corresponding data. */ DWARN(vgenp, ldcp, "NACK: start(%d), end(%d)\n", start, end); /* validate start and end indeces in the tx nack msg */ if (!(CHECK_TXI(start, ldcp)) || !(CHECK_TXI(end, ldcp))) { /* drop the message if invalid index */ DWARN(vgenp, ldcp, "Invalid Tx nack start(%d) or end(%d)\n", start, end); return (rv); } /* validate dring_ident */ if (dringmsg->dring_ident != ldcp->local_hparams.dring_ident) { /* invalid dring_ident, drop the msg */ DWARN(vgenp, ldcp, "Invalid dring ident 0x%x\n", dringmsg->dring_ident); return (rv); } mutex_enter(&ldcp->txlock); mutex_enter(&ldcp->tclock); if (ldcp->next_tbufp == ldcp->cur_tbufp) { /* no busy descriptors, bogus nack ? */ mutex_exit(&ldcp->tclock); mutex_exit(&ldcp->txlock); return (rv); } #ifdef VGEN_REXMIT /* send a new dring data msg including the lost descrs */ end = ldcp->next_tbufp - ldcp->tbufp; DECR_TXI(end, ldcp); rv = vgen_send_dring_data(ldcp, start, end); if (rv != 0) { /* * vgen_send_dring_data() error: drop all packets * in this descr range */ DWARN(vgenp, ldcp, "vgen_send_dring_data failed: rv(%d)\n", rv); for (txi = start; txi <= end; ) { tbufp = &(ldcp->tbufp[txi]); txdp = tbufp->descp; hdrp = &txdp->hdr; tbufp->flags = VGEN_PRIV_DESC_FREE; hdrp->dstate = VIO_DESC_FREE; hdrp->ack = B_FALSE; statsp->oerrors++; } /* update next pointer */ ldcp->next_tbufp = &(ldcp->tbufp[start]); ldcp->next_txi = start; } DBG2(vgenp, ldcp, "rexmit: start(%d) end(%d)\n", start, end); #else /* VGEN_REXMIT */ /* we just mark the descrs as done so they can be reclaimed */ for (txi = start; txi <= end; ) { txdp = &(ldcp->txdp[txi]); hdrp = &txdp->hdr; if (hdrp->dstate == VIO_DESC_READY) hdrp->dstate = VIO_DESC_DONE; INCR_TXI(txi, ldcp); } #endif /* VGEN_REXMIT */ mutex_exit(&ldcp->tclock); mutex_exit(&ldcp->txlock); DBG1(vgenp, ldcp, "exit rv(%d)\n", rv); return (rv); } static void vgen_reclaim(vgen_ldc_t *ldcp) { mutex_enter(&ldcp->tclock); vgen_reclaim_dring(ldcp); ldcp->reclaim_lbolt = ddi_get_lbolt(); mutex_exit(&ldcp->tclock); } /* * transmit reclaim function. starting from the current reclaim index * look for descriptors marked DONE and reclaim the descriptor and the * corresponding buffers (tbuf). */ static void vgen_reclaim_dring(vgen_ldc_t *ldcp) { int count = 0; vnet_public_desc_t *txdp; vgen_private_desc_t *tbufp; vio_dring_entry_hdr_t *hdrp; vgen_t *vgenp = LDC_TO_VGEN(ldcp); #ifdef DEBUG if (vgen_trigger_txtimeout) return; #endif tbufp = ldcp->cur_tbufp; txdp = tbufp->descp; hdrp = &txdp->hdr; while ((hdrp->dstate == VIO_DESC_DONE) && (tbufp != ldcp->next_tbufp)) { tbufp->flags = VGEN_PRIV_DESC_FREE; hdrp->dstate = VIO_DESC_FREE; hdrp->ack = B_FALSE; tbufp = NEXTTBUF(ldcp, tbufp); txdp = tbufp->descp; hdrp = &txdp->hdr; count++; } ldcp->cur_tbufp = tbufp; /* * Check if mac layer should be notified to restart transmissions */ if ((ldcp->need_resched) && (count > 0)) { ldcp->need_resched = B_FALSE; vnet_tx_update(vgenp->vnetp); } } /* return the number of pending transmits for the channel */ static int vgen_num_txpending(vgen_ldc_t *ldcp) { int n; if (ldcp->next_tbufp >= ldcp->cur_tbufp) { n = ldcp->next_tbufp - ldcp->cur_tbufp; } else { /* cur_tbufp > next_tbufp */ n = ldcp->num_txds - (ldcp->cur_tbufp - ldcp->next_tbufp); } return (n); } /* determine if the transmit descriptor ring is full */ static int vgen_tx_dring_full(vgen_ldc_t *ldcp) { vgen_private_desc_t *tbufp; vgen_private_desc_t *ntbufp; tbufp = ldcp->next_tbufp; ntbufp = NEXTTBUF(ldcp, tbufp); if (ntbufp == ldcp->cur_tbufp) { /* out of tbufs/txds */ return (VGEN_SUCCESS); } return (VGEN_FAILURE); } /* determine if timeout condition has occured */ static int vgen_ldc_txtimeout(vgen_ldc_t *ldcp) { if (((ddi_get_lbolt() - ldcp->reclaim_lbolt) > drv_usectohz(vnet_ldcwd_txtimeout * 1000)) && (vnet_ldcwd_txtimeout) && (vgen_tx_dring_full(ldcp) == VGEN_SUCCESS)) { return (VGEN_SUCCESS); } else { return (VGEN_FAILURE); } } /* transmit watchdog timeout handler */ static void vgen_ldc_watchdog(void *arg) { vgen_ldc_t *ldcp; vgen_t *vgenp; int rv; ldcp = (vgen_ldc_t *)arg; vgenp = LDC_TO_VGEN(ldcp); rv = vgen_ldc_txtimeout(ldcp); if (rv == VGEN_SUCCESS) { DWARN(vgenp, ldcp, "transmit timeout\n"); #ifdef DEBUG if (vgen_trigger_txtimeout) { /* tx timeout triggered for debugging */ vgen_trigger_txtimeout = 0; } #endif mutex_enter(&ldcp->cblock); ldcp->need_ldc_reset = B_TRUE; vgen_handshake_retry(ldcp); mutex_exit(&ldcp->cblock); if (ldcp->need_resched) { ldcp->need_resched = B_FALSE; vnet_tx_update(vgenp->vnetp); } } ldcp->wd_tid = timeout(vgen_ldc_watchdog, (caddr_t)ldcp, drv_usectohz(vnet_ldcwd_interval * 1000)); } /* handler for error messages received from the peer ldc end-point */ static void vgen_handle_errmsg(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { _NOTE(ARGUNUSED(ldcp, tagp)) } /* Check if the session id in the received message is valid */ static int vgen_check_sid(vgen_ldc_t *ldcp, vio_msg_tag_t *tagp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); if (tagp->vio_sid != ldcp->peer_sid) { DWARN(vgenp, ldcp, "sid mismatch: expected(%x), rcvd(%x)\n", ldcp->peer_sid, tagp->vio_sid); return (VGEN_FAILURE); } else return (VGEN_SUCCESS); } static caddr_t vgen_print_ethaddr(uint8_t *a, char *ebuf) { (void) sprintf(ebuf, "%x:%x:%x:%x:%x:%x", a[0], a[1], a[2], a[3], a[4], a[5]); return (ebuf); } /* Handshake watchdog timeout handler */ static void vgen_hwatchdog(void *arg) { vgen_ldc_t *ldcp = (vgen_ldc_t *)arg; vgen_t *vgenp = LDC_TO_VGEN(ldcp); DWARN(vgenp, ldcp, "handshake timeout ldc(%lx) phase(%x) state(%x)\n", ldcp->hphase, ldcp->hstate); mutex_enter(&ldcp->cblock); if (ldcp->cancel_htid) { ldcp->cancel_htid = 0; mutex_exit(&ldcp->cblock); return; } ldcp->htid = 0; ldcp->need_ldc_reset = B_TRUE; vgen_handshake_retry(ldcp); mutex_exit(&ldcp->cblock); } static void vgen_print_hparams(vgen_hparams_t *hp) { uint8_t addr[6]; char ea[6]; ldc_mem_cookie_t *dc; cmn_err(CE_CONT, "version_info:\n"); cmn_err(CE_CONT, "\tver_major: %d, ver_minor: %d, dev_class: %d\n", hp->ver_major, hp->ver_minor, hp->dev_class); vnet_macaddr_ultostr(hp->addr, addr); cmn_err(CE_CONT, "attr_info:\n"); cmn_err(CE_CONT, "\tMTU: %lx, addr: %s\n", hp->mtu, vgen_print_ethaddr(addr, ea)); cmn_err(CE_CONT, "\taddr_type: %x, xfer_mode: %x, ack_freq: %x\n", hp->addr_type, hp->xfer_mode, hp->ack_freq); dc = &hp->dring_cookie; cmn_err(CE_CONT, "dring_info:\n"); cmn_err(CE_CONT, "\tlength: %d, dsize: %d\n", hp->num_desc, hp->desc_size); cmn_err(CE_CONT, "\tldc_addr: 0x%lx, ldc_size: %ld\n", dc->addr, dc->size); cmn_err(CE_CONT, "\tdring_ident: 0x%lx\n", hp->dring_ident); } static void vgen_print_ldcinfo(vgen_ldc_t *ldcp) { vgen_hparams_t *hp; cmn_err(CE_CONT, "Channel Information:\n"); cmn_err(CE_CONT, "\tldc_id: 0x%lx, ldc_status: 0x%x\n", ldcp->ldc_id, ldcp->ldc_status); cmn_err(CE_CONT, "\tlocal_sid: 0x%x, peer_sid: 0x%x\n", ldcp->local_sid, ldcp->peer_sid); cmn_err(CE_CONT, "\thphase: 0x%x, hstate: 0x%x\n", ldcp->hphase, ldcp->hstate); cmn_err(CE_CONT, "Local handshake params:\n"); hp = &ldcp->local_hparams; vgen_print_hparams(hp); cmn_err(CE_CONT, "Peer handshake params:\n"); hp = &ldcp->peer_hparams; vgen_print_hparams(hp); } /* * vgen_ldc_queue_data -- Queue data in the LDC. */ static void vgen_ldc_queue_data(vgen_ldc_t *ldcp, mblk_t *rhead, mblk_t *rtail) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); /* * If the receive thread is enabled, then the queue * is protected by the soft_lock. After queuing, trigger * the soft interrupt so that the interrupt handler sends these * messages up the stack. * * If the receive thread is not enabled, then the list is * automatically protected by the cblock lock, so no need * to hold any additional locks. */ if (ldcp->rcv_thread != NULL) { mutex_enter(&ldcp->soft_lock); } if (ldcp->rcv_mhead == NULL) { ldcp->rcv_mhead = rhead; ldcp->rcv_mtail = rtail; } else { ldcp->rcv_mtail->b_next = rhead; ldcp->rcv_mtail = rtail; } if (ldcp->rcv_thread != NULL) { mutex_exit(&ldcp->soft_lock); (void) ddi_intr_trigger_softint(ldcp->soft_handle, NULL); } DBG1(vgenp, ldcp, "exit\n"); } /* * vgen_ldc_rcv_worker -- A per LDC worker thread to receive data. * This thread is woken up by the LDC interrupt handler to process * LDC packets and receive data. */ static void vgen_ldc_rcv_worker(void *arg) { callb_cpr_t cprinfo; vgen_ldc_t *ldcp = (vgen_ldc_t *)arg; vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); CALLB_CPR_INIT(&cprinfo, &ldcp->rcv_thr_lock, callb_generic_cpr, "vnet_rcv_thread"); mutex_enter(&ldcp->rcv_thr_lock); ldcp->rcv_thr_flags |= VGEN_WTHR_RUNNING; while (!(ldcp->rcv_thr_flags & VGEN_WTHR_STOP)) { CALLB_CPR_SAFE_BEGIN(&cprinfo); /* * Wait until the data is received or a stop * request is received. */ while (!(ldcp->rcv_thr_flags & (VGEN_WTHR_DATARCVD | VGEN_WTHR_STOP))) { cv_wait(&ldcp->rcv_thr_cv, &ldcp->rcv_thr_lock); } CALLB_CPR_SAFE_END(&cprinfo, &ldcp->rcv_thr_lock) /* * First process the stop request. */ if (ldcp->rcv_thr_flags & VGEN_WTHR_STOP) { DBG2(vgenp, ldcp, "stopped\n"); break; } ldcp->rcv_thr_flags &= ~VGEN_WTHR_DATARCVD; mutex_exit(&ldcp->rcv_thr_lock); DBG2(vgenp, ldcp, "calling vgen_handle_evt_read\n"); vgen_handle_evt_read(ldcp); mutex_enter(&ldcp->rcv_thr_lock); } /* * Update the run status and wakeup the thread that * has sent the stop request. */ ldcp->rcv_thr_flags &= ~VGEN_WTHR_RUNNING; cv_signal(&ldcp->rcv_thr_cv); CALLB_CPR_EXIT(&cprinfo); thread_exit(); DBG1(vgenp, ldcp, "exit\n"); } /* vgen_stop_rcv_thread -- Co-ordinate with receive thread to stop it */ static void vgen_stop_rcv_thread(vgen_ldc_t *ldcp) { vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); /* * Send a stop request by setting the stop flag and * wait until the receive thread stops. */ mutex_enter(&ldcp->rcv_thr_lock); if (ldcp->rcv_thr_flags & VGEN_WTHR_RUNNING) { ldcp->rcv_thr_flags |= VGEN_WTHR_STOP; cv_signal(&ldcp->rcv_thr_cv); DBG2(vgenp, ldcp, "waiting..."); while (ldcp->rcv_thr_flags & VGEN_WTHR_RUNNING) { cv_wait(&ldcp->rcv_thr_cv, &ldcp->rcv_thr_lock); } } mutex_exit(&ldcp->rcv_thr_lock); ldcp->rcv_thread = NULL; DBG1(vgenp, ldcp, "exit\n"); } /* * vgen_ldc_rcv_softintr -- LDC Soft interrupt handler function. * Its job is to pickup the recieved packets that are queued in the * LDC and send them up. * * NOTE: An interrupt handler is being used to handle the upper * layer(s) requirement to send up only at interrupt context. */ /* ARGSUSED */ static uint_t vgen_ldc_rcv_softintr(caddr_t arg1, caddr_t arg2) { mblk_t *mp; vgen_ldc_t *ldcp = (vgen_ldc_t *)arg1; vgen_t *vgenp = LDC_TO_VGEN(ldcp); DBG1(vgenp, ldcp, "enter\n"); DTRACE_PROBE1(vgen_soft_intr, uint64_t, ldcp->ldc_id); mutex_enter(&ldcp->soft_lock); mp = ldcp->rcv_mhead; ldcp->rcv_mhead = ldcp->rcv_mtail = NULL; mutex_exit(&ldcp->soft_lock); if (mp != NULL) { vnet_rx(vgenp->vnetp, NULL, mp); } DBG1(vgenp, ldcp, "exit\n"); return (DDI_INTR_CLAIMED); } #if DEBUG /* * Print debug messages - set to 0xf to enable all msgs */ static void debug_printf(const char *fname, vgen_t *vgenp, vgen_ldc_t *ldcp, const char *fmt, ...) { char buf[256]; char *bufp = buf; va_list ap; if ((vgenp != NULL) && (vgenp->vnetp != NULL)) { (void) sprintf(bufp, "vnet%d:", ((vnet_t *)(vgenp->vnetp))->instance); bufp += strlen(bufp); } if (ldcp != NULL) { (void) sprintf(bufp, "ldc(%ld):", ldcp->ldc_id); bufp += strlen(bufp); } (void) sprintf(bufp, "%s: ", fname); bufp += strlen(bufp); va_start(ap, fmt); (void) vsprintf(bufp, fmt, ap); va_end(ap); if ((ldcp == NULL) ||(vgendbg_ldcid == -1) || (vgendbg_ldcid == ldcp->ldc_id)) { cmn_err(CE_CONT, "%s\n", buf); } } #endif