/*- * Copyright (c) 2012 Chelsio Communications, Inc. * All rights reserved. * Written by: Navdeep Parhar * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define TCPSTATES #include #include #ifdef TCP_OFFLOAD #include "common/common.h" #include "common/t4_msg.h" #include "common/t4_regs.h" #include "common/t4_regs_values.h" #include "common/t4_tcb.h" #include "tom/t4_tom_l2t.h" #include "tom/t4_tom.h" static struct protosw ddp_protosw; static struct pr_usrreqs ddp_usrreqs; static struct protosw ddp6_protosw; static struct pr_usrreqs ddp6_usrreqs; /* Module ops */ static int t4_tom_mod_load(void); static int t4_tom_mod_unload(void); static int t4_tom_modevent(module_t, int, void *); /* ULD ops and helpers */ static int t4_tom_activate(struct adapter *); static int t4_tom_deactivate(struct adapter *); static struct uld_info tom_uld_info = { .uld_id = ULD_TOM, .activate = t4_tom_activate, .deactivate = t4_tom_deactivate, }; static void queue_tid_release(struct adapter *, int); static void release_offload_resources(struct toepcb *); static int alloc_tid_tabs(struct tid_info *); static void free_tid_tabs(struct tid_info *); static int add_lip(struct adapter *, struct in6_addr *); static int delete_lip(struct adapter *, struct in6_addr *); static struct clip_entry *search_lip(struct tom_data *, struct in6_addr *); static void init_clip_table(struct adapter *, struct tom_data *); static void update_clip(struct adapter *, void *); static void t4_clip_task(void *, int); static void update_clip_table(struct adapter *, struct tom_data *); static void destroy_clip_table(struct adapter *, struct tom_data *); static void free_tom_data(struct adapter *, struct tom_data *); static void reclaim_wr_resources(void *, int); static int in6_ifaddr_gen; static eventhandler_tag ifaddr_evhandler; static struct timeout_task clip_task; struct toepcb * alloc_toepcb(struct vi_info *vi, int txqid, int rxqid, int flags) { struct port_info *pi = vi->pi; struct adapter *sc = pi->adapter; struct toepcb *toep; int tx_credits, txsd_total, len; /* * The firmware counts tx work request credits in units of 16 bytes * each. Reserve room for an ABORT_REQ so the driver never has to worry * about tx credits if it wants to abort a connection. */ tx_credits = sc->params.ofldq_wr_cred; tx_credits -= howmany(sizeof(struct cpl_abort_req), 16); /* * Shortest possible tx work request is a fw_ofld_tx_data_wr + 1 byte * immediate payload, and firmware counts tx work request credits in * units of 16 byte. Calculate the maximum work requests possible. */ txsd_total = tx_credits / howmany((sizeof(struct fw_ofld_tx_data_wr) + 1), 16); if (txqid < 0) txqid = (arc4random() % vi->nofldtxq) + vi->first_ofld_txq; KASSERT(txqid >= vi->first_ofld_txq && txqid < vi->first_ofld_txq + vi->nofldtxq, ("%s: txqid %d for vi %p (first %d, n %d)", __func__, txqid, vi, vi->first_ofld_txq, vi->nofldtxq)); if (rxqid < 0) rxqid = (arc4random() % vi->nofldrxq) + vi->first_ofld_rxq; KASSERT(rxqid >= vi->first_ofld_rxq && rxqid < vi->first_ofld_rxq + vi->nofldrxq, ("%s: rxqid %d for vi %p (first %d, n %d)", __func__, rxqid, vi, vi->first_ofld_rxq, vi->nofldrxq)); len = offsetof(struct toepcb, txsd) + txsd_total * sizeof(struct ofld_tx_sdesc); toep = malloc(len, M_CXGBE, M_ZERO | flags); if (toep == NULL) return (NULL); toep->td = sc->tom_softc; toep->vi = vi; toep->tx_total = tx_credits; toep->tx_credits = tx_credits; toep->ofld_txq = &sc->sge.ofld_txq[txqid]; toep->ofld_rxq = &sc->sge.ofld_rxq[rxqid]; toep->ctrlq = &sc->sge.ctrlq[pi->port_id]; mbufq_init(&toep->ulp_pduq, INT_MAX); mbufq_init(&toep->ulp_pdu_reclaimq, INT_MAX); toep->txsd_total = txsd_total; toep->txsd_avail = txsd_total; toep->txsd_pidx = 0; toep->txsd_cidx = 0; return (toep); } void free_toepcb(struct toepcb *toep) { KASSERT(!(toep->flags & TPF_ATTACHED), ("%s: attached to an inpcb", __func__)); KASSERT(!(toep->flags & TPF_CPL_PENDING), ("%s: CPL pending", __func__)); free(toep, M_CXGBE); } /* * Set up the socket for TCP offload. */ void offload_socket(struct socket *so, struct toepcb *toep) { struct tom_data *td = toep->td; struct inpcb *inp = sotoinpcb(so); struct tcpcb *tp = intotcpcb(inp); struct sockbuf *sb; INP_WLOCK_ASSERT(inp); /* Update socket */ sb = &so->so_snd; SOCKBUF_LOCK(sb); sb->sb_flags |= SB_NOCOALESCE; SOCKBUF_UNLOCK(sb); sb = &so->so_rcv; SOCKBUF_LOCK(sb); sb->sb_flags |= SB_NOCOALESCE; if (toep->ulp_mode == ULP_MODE_TCPDDP) { if (inp->inp_vflag & INP_IPV6) so->so_proto = &ddp6_protosw; else so->so_proto = &ddp_protosw; } SOCKBUF_UNLOCK(sb); /* Update TCP PCB */ tp->tod = &td->tod; tp->t_toe = toep; tp->t_flags |= TF_TOE; /* Install an extra hold on inp */ toep->inp = inp; toep->flags |= TPF_ATTACHED; in_pcbref(inp); /* Add the TOE PCB to the active list */ mtx_lock(&td->toep_list_lock); TAILQ_INSERT_HEAD(&td->toep_list, toep, link); mtx_unlock(&td->toep_list_lock); } /* This is _not_ the normal way to "unoffload" a socket. */ void undo_offload_socket(struct socket *so) { struct inpcb *inp = sotoinpcb(so); struct tcpcb *tp = intotcpcb(inp); struct toepcb *toep = tp->t_toe; struct tom_data *td = toep->td; struct sockbuf *sb; INP_WLOCK_ASSERT(inp); sb = &so->so_snd; SOCKBUF_LOCK(sb); sb->sb_flags &= ~SB_NOCOALESCE; SOCKBUF_UNLOCK(sb); sb = &so->so_rcv; SOCKBUF_LOCK(sb); sb->sb_flags &= ~SB_NOCOALESCE; SOCKBUF_UNLOCK(sb); tp->tod = NULL; tp->t_toe = NULL; tp->t_flags &= ~TF_TOE; toep->inp = NULL; toep->flags &= ~TPF_ATTACHED; if (in_pcbrele_wlocked(inp)) panic("%s: inp freed.", __func__); mtx_lock(&td->toep_list_lock); TAILQ_REMOVE(&td->toep_list, toep, link); mtx_unlock(&td->toep_list_lock); } static void release_offload_resources(struct toepcb *toep) { struct tom_data *td = toep->td; struct adapter *sc = td_adapter(td); int tid = toep->tid; KASSERT(!(toep->flags & TPF_CPL_PENDING), ("%s: %p has CPL pending.", __func__, toep)); KASSERT(!(toep->flags & TPF_ATTACHED), ("%s: %p is still attached.", __func__, toep)); CTR5(KTR_CXGBE, "%s: toep %p (tid %d, l2te %p, ce %p)", __func__, toep, tid, toep->l2te, toep->ce); /* * These queues should have been emptied at approximately the same time * that a normal connection's socket's so_snd would have been purged or * drained. Do _not_ clean up here. */ MPASS(mbufq_len(&toep->ulp_pduq) == 0); MPASS(mbufq_len(&toep->ulp_pdu_reclaimq) == 0); if (toep->ulp_mode == ULP_MODE_TCPDDP) release_ddp_resources(toep); if (toep->l2te) t4_l2t_release(toep->l2te); if (tid >= 0) { remove_tid(sc, tid); release_tid(sc, tid, toep->ctrlq); } if (toep->ce) release_lip(td, toep->ce); mtx_lock(&td->toep_list_lock); TAILQ_REMOVE(&td->toep_list, toep, link); mtx_unlock(&td->toep_list_lock); free_toepcb(toep); } /* * The kernel is done with the TCP PCB and this is our opportunity to unhook the * toepcb hanging off of it. If the TOE driver is also done with the toepcb (no * pending CPL) then it is time to release all resources tied to the toepcb. * * Also gets called when an offloaded active open fails and the TOM wants the * kernel to take the TCP PCB back. */ static void t4_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp) { #if defined(KTR) || defined(INVARIANTS) struct inpcb *inp = tp->t_inpcb; #endif struct toepcb *toep = tp->t_toe; INP_WLOCK_ASSERT(inp); KASSERT(toep != NULL, ("%s: toep is NULL", __func__)); KASSERT(toep->flags & TPF_ATTACHED, ("%s: not attached", __func__)); #ifdef KTR if (tp->t_state == TCPS_SYN_SENT) { CTR6(KTR_CXGBE, "%s: atid %d, toep %p (0x%x), inp %p (0x%x)", __func__, toep->tid, toep, toep->flags, inp, inp->inp_flags); } else { CTR6(KTR_CXGBE, "t4_pcb_detach: tid %d (%s), toep %p (0x%x), inp %p (0x%x)", toep->tid, tcpstates[tp->t_state], toep, toep->flags, inp, inp->inp_flags); } #endif tp->t_toe = NULL; tp->t_flags &= ~TF_TOE; toep->flags &= ~TPF_ATTACHED; if (!(toep->flags & TPF_CPL_PENDING)) release_offload_resources(toep); } /* * setsockopt handler. */ static void t4_ctloutput(struct toedev *tod, struct tcpcb *tp, int dir, int name) { struct adapter *sc = tod->tod_softc; struct toepcb *toep = tp->t_toe; if (dir == SOPT_GET) return; CTR4(KTR_CXGBE, "%s: tp %p, dir %u, name %u", __func__, tp, dir, name); switch (name) { case TCP_NODELAY: t4_set_tcb_field(sc, toep, 1, W_TCB_T_FLAGS, V_TF_NAGLE(1), V_TF_NAGLE(tp->t_flags & TF_NODELAY ? 0 : 1)); break; default: break; } } /* * The TOE driver will not receive any more CPLs for the tid associated with the * toepcb; release the hold on the inpcb. */ void final_cpl_received(struct toepcb *toep) { struct inpcb *inp = toep->inp; KASSERT(inp != NULL, ("%s: inp is NULL", __func__)); INP_WLOCK_ASSERT(inp); KASSERT(toep->flags & TPF_CPL_PENDING, ("%s: CPL not pending already?", __func__)); CTR6(KTR_CXGBE, "%s: tid %d, toep %p (0x%x), inp %p (0x%x)", __func__, toep->tid, toep, toep->flags, inp, inp->inp_flags); toep->inp = NULL; toep->flags &= ~TPF_CPL_PENDING; mbufq_drain(&toep->ulp_pdu_reclaimq); if (!(toep->flags & TPF_ATTACHED)) release_offload_resources(toep); if (!in_pcbrele_wlocked(inp)) INP_WUNLOCK(inp); } void insert_tid(struct adapter *sc, int tid, void *ctx) { struct tid_info *t = &sc->tids; t->tid_tab[tid] = ctx; atomic_add_int(&t->tids_in_use, 1); } void * lookup_tid(struct adapter *sc, int tid) { struct tid_info *t = &sc->tids; return (t->tid_tab[tid]); } void update_tid(struct adapter *sc, int tid, void *ctx) { struct tid_info *t = &sc->tids; t->tid_tab[tid] = ctx; } void remove_tid(struct adapter *sc, int tid) { struct tid_info *t = &sc->tids; t->tid_tab[tid] = NULL; atomic_subtract_int(&t->tids_in_use, 1); } void release_tid(struct adapter *sc, int tid, struct sge_wrq *ctrlq) { struct wrqe *wr; struct cpl_tid_release *req; wr = alloc_wrqe(sizeof(*req), ctrlq); if (wr == NULL) { queue_tid_release(sc, tid); /* defer */ return; } req = wrtod(wr); INIT_TP_WR_MIT_CPL(req, CPL_TID_RELEASE, tid); t4_wrq_tx(sc, wr); } static void queue_tid_release(struct adapter *sc, int tid) { CXGBE_UNIMPLEMENTED("deferred tid release"); } /* * What mtu_idx to use, given a 4-tuple and/or an MSS cap */ int find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc, int pmss) { unsigned short *mtus = &sc->params.mtus[0]; int i, mss, n; KASSERT(inc != NULL || pmss > 0, ("%s: at least one of inc/pmss must be specified", __func__)); mss = inc ? tcp_mssopt(inc) : pmss; if (pmss > 0 && mss > pmss) mss = pmss; if (inc->inc_flags & INC_ISIPV6) n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr); else n = sizeof(struct ip) + sizeof(struct tcphdr); for (i = 0; i < NMTUS - 1 && mtus[i + 1] <= mss + n; i++) continue; return (i); } /* * Determine the receive window size for a socket. */ u_long select_rcv_wnd(struct socket *so) { unsigned long wnd; SOCKBUF_LOCK_ASSERT(&so->so_rcv); wnd = sbspace(&so->so_rcv); if (wnd < MIN_RCV_WND) wnd = MIN_RCV_WND; return min(wnd, MAX_RCV_WND); } int select_rcv_wscale(void) { int wscale = 0; unsigned long space = sb_max; if (space > MAX_RCV_WND) space = MAX_RCV_WND; while (wscale < TCP_MAX_WINSHIFT && (TCP_MAXWIN << wscale) < space) wscale++; return (wscale); } extern int always_keepalive; #define VIID_SMACIDX(v) (((unsigned int)(v) & 0x7f) << 1) /* * socket so could be a listening socket too. */ uint64_t calc_opt0(struct socket *so, struct vi_info *vi, struct l2t_entry *e, int mtu_idx, int rscale, int rx_credits, int ulp_mode) { uint64_t opt0; KASSERT(rx_credits <= M_RCV_BUFSIZ, ("%s: rcv_bufsiz too high", __func__)); opt0 = F_TCAM_BYPASS | V_WND_SCALE(rscale) | V_MSS_IDX(mtu_idx) | V_ULP_MODE(ulp_mode) | V_RCV_BUFSIZ(rx_credits); if (so != NULL) { struct inpcb *inp = sotoinpcb(so); struct tcpcb *tp = intotcpcb(inp); int keepalive = always_keepalive || so_options_get(so) & SO_KEEPALIVE; opt0 |= V_NAGLE((tp->t_flags & TF_NODELAY) == 0); opt0 |= V_KEEP_ALIVE(keepalive != 0); } if (e != NULL) opt0 |= V_L2T_IDX(e->idx); if (vi != NULL) { opt0 |= V_SMAC_SEL(VIID_SMACIDX(vi->viid)); opt0 |= V_TX_CHAN(vi->pi->tx_chan); } return htobe64(opt0); } uint64_t select_ntuple(struct vi_info *vi, struct l2t_entry *e) { struct adapter *sc = vi->pi->adapter; struct tp_params *tp = &sc->params.tp; uint16_t viid = vi->viid; uint64_t ntuple = 0; /* * Initialize each of the fields which we care about which are present * in the Compressed Filter Tuple. */ if (tp->vlan_shift >= 0 && e->vlan != CPL_L2T_VLAN_NONE) ntuple |= (uint64_t)(F_FT_VLAN_VLD | e->vlan) << tp->vlan_shift; if (tp->port_shift >= 0) ntuple |= (uint64_t)e->lport << tp->port_shift; if (tp->protocol_shift >= 0) ntuple |= (uint64_t)IPPROTO_TCP << tp->protocol_shift; if (tp->vnic_shift >= 0) { uint32_t vf = G_FW_VIID_VIN(viid); uint32_t pf = G_FW_VIID_PFN(viid); uint32_t vld = G_FW_VIID_VIVLD(viid); ntuple |= (uint64_t)(V_FT_VNID_ID_VF(vf) | V_FT_VNID_ID_PF(pf) | V_FT_VNID_ID_VLD(vld)) << tp->vnic_shift; } if (is_t4(sc)) return (htobe32((uint32_t)ntuple)); else return (htobe64(V_FILTER_TUPLE(ntuple))); } void set_tcpddp_ulp_mode(struct toepcb *toep) { toep->ulp_mode = ULP_MODE_TCPDDP; toep->ddp_flags = DDP_OK; toep->ddp_score = DDP_LOW_SCORE; } int negative_advice(int status) { return (status == CPL_ERR_RTX_NEG_ADVICE || status == CPL_ERR_PERSIST_NEG_ADVICE || status == CPL_ERR_KEEPALV_NEG_ADVICE); } static int alloc_tid_tabs(struct tid_info *t) { size_t size; unsigned int i; size = t->ntids * sizeof(*t->tid_tab) + t->natids * sizeof(*t->atid_tab) + t->nstids * sizeof(*t->stid_tab); t->tid_tab = malloc(size, M_CXGBE, M_ZERO | M_NOWAIT); if (t->tid_tab == NULL) return (ENOMEM); mtx_init(&t->atid_lock, "atid lock", NULL, MTX_DEF); t->atid_tab = (union aopen_entry *)&t->tid_tab[t->ntids]; t->afree = t->atid_tab; t->atids_in_use = 0; for (i = 1; i < t->natids; i++) t->atid_tab[i - 1].next = &t->atid_tab[i]; t->atid_tab[t->natids - 1].next = NULL; mtx_init(&t->stid_lock, "stid lock", NULL, MTX_DEF); t->stid_tab = (struct listen_ctx **)&t->atid_tab[t->natids]; t->stids_in_use = 0; TAILQ_INIT(&t->stids); t->nstids_free_head = t->nstids; atomic_store_rel_int(&t->tids_in_use, 0); return (0); } static void free_tid_tabs(struct tid_info *t) { KASSERT(t->tids_in_use == 0, ("%s: %d tids still in use.", __func__, t->tids_in_use)); KASSERT(t->atids_in_use == 0, ("%s: %d atids still in use.", __func__, t->atids_in_use)); KASSERT(t->stids_in_use == 0, ("%s: %d tids still in use.", __func__, t->stids_in_use)); free(t->tid_tab, M_CXGBE); t->tid_tab = NULL; if (mtx_initialized(&t->atid_lock)) mtx_destroy(&t->atid_lock); if (mtx_initialized(&t->stid_lock)) mtx_destroy(&t->stid_lock); } static int add_lip(struct adapter *sc, struct in6_addr *lip) { struct fw_clip_cmd c; ASSERT_SYNCHRONIZED_OP(sc); /* mtx_assert(&td->clip_table_lock, MA_OWNED); */ memset(&c, 0, sizeof(c)); c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST | F_FW_CMD_WRITE); c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_ALLOC | FW_LEN16(c)); c.ip_hi = *(uint64_t *)&lip->s6_addr[0]; c.ip_lo = *(uint64_t *)&lip->s6_addr[8]; return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c)); } static int delete_lip(struct adapter *sc, struct in6_addr *lip) { struct fw_clip_cmd c; ASSERT_SYNCHRONIZED_OP(sc); /* mtx_assert(&td->clip_table_lock, MA_OWNED); */ memset(&c, 0, sizeof(c)); c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST | F_FW_CMD_READ); c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_FREE | FW_LEN16(c)); c.ip_hi = *(uint64_t *)&lip->s6_addr[0]; c.ip_lo = *(uint64_t *)&lip->s6_addr[8]; return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c)); } static struct clip_entry * search_lip(struct tom_data *td, struct in6_addr *lip) { struct clip_entry *ce; mtx_assert(&td->clip_table_lock, MA_OWNED); TAILQ_FOREACH(ce, &td->clip_table, link) { if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip)) return (ce); } return (NULL); } struct clip_entry * hold_lip(struct tom_data *td, struct in6_addr *lip) { struct clip_entry *ce; mtx_lock(&td->clip_table_lock); ce = search_lip(td, lip); if (ce != NULL) ce->refcount++; mtx_unlock(&td->clip_table_lock); return (ce); } void release_lip(struct tom_data *td, struct clip_entry *ce) { mtx_lock(&td->clip_table_lock); KASSERT(search_lip(td, &ce->lip) == ce, ("%s: CLIP entry %p p not in CLIP table.", __func__, ce)); KASSERT(ce->refcount > 0, ("%s: CLIP entry %p has refcount 0", __func__, ce)); --ce->refcount; mtx_unlock(&td->clip_table_lock); } static void init_clip_table(struct adapter *sc, struct tom_data *td) { ASSERT_SYNCHRONIZED_OP(sc); mtx_init(&td->clip_table_lock, "CLIP table lock", NULL, MTX_DEF); TAILQ_INIT(&td->clip_table); td->clip_gen = -1; update_clip_table(sc, td); } static void update_clip(struct adapter *sc, void *arg __unused) { if (begin_synchronized_op(sc, NULL, HOLD_LOCK, "t4tomuc")) return; if (uld_active(sc, ULD_TOM)) update_clip_table(sc, sc->tom_softc); end_synchronized_op(sc, LOCK_HELD); } static void t4_clip_task(void *arg, int count) { t4_iterate(update_clip, NULL); } static void update_clip_table(struct adapter *sc, struct tom_data *td) { struct rm_priotracker in6_ifa_tracker; struct in6_ifaddr *ia; struct in6_addr *lip, tlip; struct clip_head stale; struct clip_entry *ce, *ce_temp; int rc, gen = atomic_load_acq_int(&in6_ifaddr_gen); ASSERT_SYNCHRONIZED_OP(sc); IN6_IFADDR_RLOCK(&in6_ifa_tracker); mtx_lock(&td->clip_table_lock); if (gen == td->clip_gen) goto done; TAILQ_INIT(&stale); TAILQ_CONCAT(&stale, &td->clip_table, link); TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { lip = &ia->ia_addr.sin6_addr; KASSERT(!IN6_IS_ADDR_MULTICAST(lip), ("%s: mcast address in in6_ifaddr list", __func__)); if (IN6_IS_ADDR_LOOPBACK(lip)) continue; if (IN6_IS_SCOPE_EMBED(lip)) { /* Remove the embedded scope */ tlip = *lip; lip = &tlip; in6_clearscope(lip); } /* * XXX: how to weed out the link local address for the loopback * interface? It's fe80::1 usually (always?). */ /* * If it's in the main list then we already know it's not stale. */ TAILQ_FOREACH(ce, &td->clip_table, link) { if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip)) goto next; } /* * If it's in the stale list we should move it to the main list. */ TAILQ_FOREACH(ce, &stale, link) { if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip)) { TAILQ_REMOVE(&stale, ce, link); TAILQ_INSERT_TAIL(&td->clip_table, ce, link); goto next; } } /* A new IP6 address; add it to the CLIP table */ ce = malloc(sizeof(*ce), M_CXGBE, M_NOWAIT); memcpy(&ce->lip, lip, sizeof(ce->lip)); ce->refcount = 0; rc = add_lip(sc, lip); if (rc == 0) TAILQ_INSERT_TAIL(&td->clip_table, ce, link); else { char ip[INET6_ADDRSTRLEN]; inet_ntop(AF_INET6, &ce->lip, &ip[0], sizeof(ip)); log(LOG_ERR, "%s: could not add %s (%d)\n", __func__, ip, rc); free(ce, M_CXGBE); } next: continue; } /* * Remove stale addresses (those no longer in V_in6_ifaddrhead) that are * no longer referenced by the driver. */ TAILQ_FOREACH_SAFE(ce, &stale, link, ce_temp) { if (ce->refcount == 0) { rc = delete_lip(sc, &ce->lip); if (rc == 0) { TAILQ_REMOVE(&stale, ce, link); free(ce, M_CXGBE); } else { char ip[INET6_ADDRSTRLEN]; inet_ntop(AF_INET6, &ce->lip, &ip[0], sizeof(ip)); log(LOG_ERR, "%s: could not delete %s (%d)\n", __func__, ip, rc); } } } /* The ones that are still referenced need to stay in the CLIP table */ TAILQ_CONCAT(&td->clip_table, &stale, link); td->clip_gen = gen; done: mtx_unlock(&td->clip_table_lock); IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); } static void destroy_clip_table(struct adapter *sc, struct tom_data *td) { struct clip_entry *ce, *ce_temp; if (mtx_initialized(&td->clip_table_lock)) { mtx_lock(&td->clip_table_lock); TAILQ_FOREACH_SAFE(ce, &td->clip_table, link, ce_temp) { KASSERT(ce->refcount == 0, ("%s: CLIP entry %p still in use (%d)", __func__, ce, ce->refcount)); TAILQ_REMOVE(&td->clip_table, ce, link); delete_lip(sc, &ce->lip); free(ce, M_CXGBE); } mtx_unlock(&td->clip_table_lock); mtx_destroy(&td->clip_table_lock); } } static void free_tom_data(struct adapter *sc, struct tom_data *td) { ASSERT_SYNCHRONIZED_OP(sc); KASSERT(TAILQ_EMPTY(&td->toep_list), ("%s: TOE PCB list is not empty.", __func__)); KASSERT(td->lctx_count == 0, ("%s: lctx hash table is not empty.", __func__)); t4_uninit_l2t_cpl_handlers(sc); t4_uninit_cpl_io_handlers(sc); t4_uninit_ddp(sc, td); destroy_clip_table(sc, td); if (td->listen_mask != 0) hashdestroy(td->listen_hash, M_CXGBE, td->listen_mask); if (mtx_initialized(&td->unsent_wr_lock)) mtx_destroy(&td->unsent_wr_lock); if (mtx_initialized(&td->lctx_hash_lock)) mtx_destroy(&td->lctx_hash_lock); if (mtx_initialized(&td->toep_list_lock)) mtx_destroy(&td->toep_list_lock); free_tid_tabs(&sc->tids); free(td, M_CXGBE); } static void reclaim_wr_resources(void *arg, int count) { struct tom_data *td = arg; STAILQ_HEAD(, wrqe) twr_list = STAILQ_HEAD_INITIALIZER(twr_list); struct cpl_act_open_req *cpl; u_int opcode, atid; struct wrqe *wr; struct adapter *sc; mtx_lock(&td->unsent_wr_lock); STAILQ_SWAP(&td->unsent_wr_list, &twr_list, wrqe); mtx_unlock(&td->unsent_wr_lock); while ((wr = STAILQ_FIRST(&twr_list)) != NULL) { STAILQ_REMOVE_HEAD(&twr_list, link); cpl = wrtod(wr); opcode = GET_OPCODE(cpl); switch (opcode) { case CPL_ACT_OPEN_REQ: case CPL_ACT_OPEN_REQ6: atid = G_TID_TID(be32toh(OPCODE_TID(cpl))); sc = td_adapter(td); CTR2(KTR_CXGBE, "%s: atid %u ", __func__, atid); act_open_failure_cleanup(sc, atid, EHOSTUNREACH); free(wr, M_CXGBE); break; default: log(LOG_ERR, "%s: leaked work request %p, wr_len %d, " "opcode %x\n", __func__, wr, wr->wr_len, opcode); /* WR not freed here; go look at it with a debugger. */ } } } /* * Ground control to Major TOM * Commencing countdown, engines on */ static int t4_tom_activate(struct adapter *sc) { struct tom_data *td; struct toedev *tod; struct vi_info *vi; int i, rc, v; ASSERT_SYNCHRONIZED_OP(sc); /* per-adapter softc for TOM */ td = malloc(sizeof(*td), M_CXGBE, M_ZERO | M_NOWAIT); if (td == NULL) return (ENOMEM); /* List of TOE PCBs and associated lock */ mtx_init(&td->toep_list_lock, "PCB list lock", NULL, MTX_DEF); TAILQ_INIT(&td->toep_list); /* Listen context */ mtx_init(&td->lctx_hash_lock, "lctx hash lock", NULL, MTX_DEF); td->listen_hash = hashinit_flags(LISTEN_HASH_SIZE, M_CXGBE, &td->listen_mask, HASH_NOWAIT); /* List of WRs for which L2 resolution failed */ mtx_init(&td->unsent_wr_lock, "Unsent WR list lock", NULL, MTX_DEF); STAILQ_INIT(&td->unsent_wr_list); TASK_INIT(&td->reclaim_wr_resources, 0, reclaim_wr_resources, td); /* TID tables */ rc = alloc_tid_tabs(&sc->tids); if (rc != 0) goto done; /* DDP page pods and CPL handlers */ t4_init_ddp(sc, td); /* CLIP table for IPv6 offload */ init_clip_table(sc, td); /* CPL handlers */ t4_init_connect_cpl_handlers(sc); t4_init_l2t_cpl_handlers(sc); t4_init_listen_cpl_handlers(sc); t4_init_cpl_io_handlers(sc); /* toedev ops */ tod = &td->tod; init_toedev(tod); tod->tod_softc = sc; tod->tod_connect = t4_connect; tod->tod_listen_start = t4_listen_start; tod->tod_listen_stop = t4_listen_stop; tod->tod_rcvd = t4_rcvd; tod->tod_output = t4_tod_output; tod->tod_send_rst = t4_send_rst; tod->tod_send_fin = t4_send_fin; tod->tod_pcb_detach = t4_pcb_detach; tod->tod_l2_update = t4_l2_update; tod->tod_syncache_added = t4_syncache_added; tod->tod_syncache_removed = t4_syncache_removed; tod->tod_syncache_respond = t4_syncache_respond; tod->tod_offload_socket = t4_offload_socket; tod->tod_ctloutput = t4_ctloutput; for_each_port(sc, i) { for_each_vi(sc->port[i], v, vi) { TOEDEV(vi->ifp) = &td->tod; } } sc->tom_softc = td; register_toedev(sc->tom_softc); done: if (rc != 0) free_tom_data(sc, td); return (rc); } static int t4_tom_deactivate(struct adapter *sc) { int rc = 0; struct tom_data *td = sc->tom_softc; ASSERT_SYNCHRONIZED_OP(sc); if (td == NULL) return (0); /* XXX. KASSERT? */ if (sc->offload_map != 0) return (EBUSY); /* at least one port has IFCAP_TOE enabled */ if (uld_active(sc, ULD_IWARP) || uld_active(sc, ULD_ISCSI)) return (EBUSY); /* both iWARP and iSCSI rely on the TOE. */ mtx_lock(&td->toep_list_lock); if (!TAILQ_EMPTY(&td->toep_list)) rc = EBUSY; mtx_unlock(&td->toep_list_lock); mtx_lock(&td->lctx_hash_lock); if (td->lctx_count > 0) rc = EBUSY; mtx_unlock(&td->lctx_hash_lock); taskqueue_drain(taskqueue_thread, &td->reclaim_wr_resources); mtx_lock(&td->unsent_wr_lock); if (!STAILQ_EMPTY(&td->unsent_wr_list)) rc = EBUSY; mtx_unlock(&td->unsent_wr_lock); if (rc == 0) { unregister_toedev(sc->tom_softc); free_tom_data(sc, td); sc->tom_softc = NULL; } return (rc); } static void t4_tom_ifaddr_event(void *arg __unused, struct ifnet *ifp) { atomic_add_rel_int(&in6_ifaddr_gen, 1); taskqueue_enqueue_timeout(taskqueue_thread, &clip_task, -hz / 4); } static int t4_tom_mod_load(void) { int rc; struct protosw *tcp_protosw, *tcp6_protosw; tcp_protosw = pffindproto(PF_INET, IPPROTO_TCP, SOCK_STREAM); if (tcp_protosw == NULL) return (ENOPROTOOPT); bcopy(tcp_protosw, &ddp_protosw, sizeof(ddp_protosw)); bcopy(tcp_protosw->pr_usrreqs, &ddp_usrreqs, sizeof(ddp_usrreqs)); ddp_usrreqs.pru_soreceive = t4_soreceive_ddp; ddp_protosw.pr_usrreqs = &ddp_usrreqs; tcp6_protosw = pffindproto(PF_INET6, IPPROTO_TCP, SOCK_STREAM); if (tcp6_protosw == NULL) return (ENOPROTOOPT); bcopy(tcp6_protosw, &ddp6_protosw, sizeof(ddp6_protosw)); bcopy(tcp6_protosw->pr_usrreqs, &ddp6_usrreqs, sizeof(ddp6_usrreqs)); ddp6_usrreqs.pru_soreceive = t4_soreceive_ddp; ddp6_protosw.pr_usrreqs = &ddp6_usrreqs; TIMEOUT_TASK_INIT(taskqueue_thread, &clip_task, 0, t4_clip_task, NULL); ifaddr_evhandler = EVENTHANDLER_REGISTER(ifaddr_event, t4_tom_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); rc = t4_register_uld(&tom_uld_info); if (rc != 0) t4_tom_mod_unload(); return (rc); } static void tom_uninit(struct adapter *sc, void *arg __unused) { if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4tomun")) return; /* Try to free resources (works only if no port has IFCAP_TOE) */ if (uld_active(sc, ULD_TOM)) t4_deactivate_uld(sc, ULD_TOM); end_synchronized_op(sc, 0); } static int t4_tom_mod_unload(void) { t4_iterate(tom_uninit, NULL); if (t4_unregister_uld(&tom_uld_info) == EBUSY) return (EBUSY); if (ifaddr_evhandler) { EVENTHANDLER_DEREGISTER(ifaddr_event, ifaddr_evhandler); taskqueue_cancel_timeout(taskqueue_thread, &clip_task, NULL); } return (0); } #endif /* TCP_OFFLOAD */ static int t4_tom_modevent(module_t mod, int cmd, void *arg) { int rc = 0; #ifdef TCP_OFFLOAD switch (cmd) { case MOD_LOAD: rc = t4_tom_mod_load(); break; case MOD_UNLOAD: rc = t4_tom_mod_unload(); break; default: rc = EINVAL; } #else printf("t4_tom: compiled without TCP_OFFLOAD support.\n"); rc = EOPNOTSUPP; #endif return (rc); } static moduledata_t t4_tom_moddata= { "t4_tom", t4_tom_modevent, 0 }; MODULE_VERSION(t4_tom, 1); MODULE_DEPEND(t4_tom, toecore, 1, 1, 1); MODULE_DEPEND(t4_tom, t4nex, 1, 1, 1); DECLARE_MODULE(t4_tom, t4_tom_moddata, SI_SUB_EXEC, SI_ORDER_ANY);