2 * Copyright (c) 2012 Chelsio Communications, Inc.
4 * Written by: Navdeep Parhar <np@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 #include "opt_inet6.h"
34 #include <sys/param.h>
35 #include <sys/types.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
40 #include <sys/limits.h>
41 #include <sys/module.h>
42 #include <sys/protosw.h>
43 #include <sys/domain.h>
44 #include <sys/refcount.h>
45 #include <sys/rmlock.h>
46 #include <sys/socket.h>
47 #include <sys/socketvar.h>
48 #include <sys/taskqueue.h>
50 #include <net/if_var.h>
51 #include <netinet/in.h>
52 #include <netinet/in_pcb.h>
53 #include <netinet/in_var.h>
54 #include <netinet/ip.h>
55 #include <netinet/ip6.h>
56 #include <netinet6/scope6_var.h>
58 #include <netinet/tcp_fsm.h>
59 #include <netinet/tcp_var.h>
60 #include <netinet/toecore.h>
63 #include "common/common.h"
64 #include "common/t4_msg.h"
65 #include "common/t4_regs.h"
66 #include "common/t4_regs_values.h"
67 #include "common/t4_tcb.h"
68 #include "tom/t4_tom_l2t.h"
69 #include "tom/t4_tom.h"
71 static struct protosw toe_protosw;
72 static struct pr_usrreqs toe_usrreqs;
74 static struct protosw toe6_protosw;
75 static struct pr_usrreqs toe6_usrreqs;
78 static int t4_tom_mod_load(void);
79 static int t4_tom_mod_unload(void);
80 static int t4_tom_modevent(module_t, int, void *);
82 /* ULD ops and helpers */
83 static int t4_tom_activate(struct adapter *);
84 static int t4_tom_deactivate(struct adapter *);
86 static struct uld_info tom_uld_info = {
88 .activate = t4_tom_activate,
89 .deactivate = t4_tom_deactivate,
92 static void queue_tid_release(struct adapter *, int);
93 static void release_offload_resources(struct toepcb *);
94 static int alloc_tid_tabs(struct tid_info *);
95 static void free_tid_tabs(struct tid_info *);
96 static int add_lip(struct adapter *, struct in6_addr *);
97 static int delete_lip(struct adapter *, struct in6_addr *);
98 static struct clip_entry *search_lip(struct tom_data *, struct in6_addr *);
99 static void init_clip_table(struct adapter *, struct tom_data *);
100 static void update_clip(struct adapter *, void *);
101 static void t4_clip_task(void *, int);
102 static void update_clip_table(struct adapter *, struct tom_data *);
103 static void destroy_clip_table(struct adapter *, struct tom_data *);
104 static void free_tom_data(struct adapter *, struct tom_data *);
105 static void reclaim_wr_resources(void *, int);
107 static int in6_ifaddr_gen;
108 static eventhandler_tag ifaddr_evhandler;
109 static struct timeout_task clip_task;
112 alloc_toepcb(struct vi_info *vi, int txqid, int rxqid, int flags)
114 struct port_info *pi = vi->pi;
115 struct adapter *sc = pi->adapter;
117 int tx_credits, txsd_total, len;
120 * The firmware counts tx work request credits in units of 16 bytes
121 * each. Reserve room for an ABORT_REQ so the driver never has to worry
122 * about tx credits if it wants to abort a connection.
124 tx_credits = sc->params.ofldq_wr_cred;
125 tx_credits -= howmany(sizeof(struct cpl_abort_req), 16);
128 * Shortest possible tx work request is a fw_ofld_tx_data_wr + 1 byte
129 * immediate payload, and firmware counts tx work request credits in
130 * units of 16 byte. Calculate the maximum work requests possible.
132 txsd_total = tx_credits /
133 howmany(sizeof(struct fw_ofld_tx_data_wr) + 1, 16);
136 txqid = (arc4random() % vi->nofldtxq) + vi->first_ofld_txq;
137 KASSERT(txqid >= vi->first_ofld_txq &&
138 txqid < vi->first_ofld_txq + vi->nofldtxq,
139 ("%s: txqid %d for vi %p (first %d, n %d)", __func__, txqid, vi,
140 vi->first_ofld_txq, vi->nofldtxq));
143 rxqid = (arc4random() % vi->nofldrxq) + vi->first_ofld_rxq;
144 KASSERT(rxqid >= vi->first_ofld_rxq &&
145 rxqid < vi->first_ofld_rxq + vi->nofldrxq,
146 ("%s: rxqid %d for vi %p (first %d, n %d)", __func__, rxqid, vi,
147 vi->first_ofld_rxq, vi->nofldrxq));
149 len = offsetof(struct toepcb, txsd) +
150 txsd_total * sizeof(struct ofld_tx_sdesc);
152 toep = malloc(len, M_CXGBE, M_ZERO | flags);
156 refcount_init(&toep->refcount, 1);
157 toep->td = sc->tom_softc;
159 toep->tx_total = tx_credits;
160 toep->tx_credits = tx_credits;
161 toep->ofld_txq = &sc->sge.ofld_txq[txqid];
162 toep->ofld_rxq = &sc->sge.ofld_rxq[rxqid];
163 toep->ctrlq = &sc->sge.ctrlq[pi->port_id];
164 mbufq_init(&toep->ulp_pduq, INT_MAX);
165 mbufq_init(&toep->ulp_pdu_reclaimq, INT_MAX);
166 toep->txsd_total = txsd_total;
167 toep->txsd_avail = txsd_total;
170 aiotx_init_toep(toep);
177 hold_toepcb(struct toepcb *toep)
180 refcount_acquire(&toep->refcount);
185 free_toepcb(struct toepcb *toep)
188 if (refcount_release(&toep->refcount) == 0)
191 KASSERT(!(toep->flags & TPF_ATTACHED),
192 ("%s: attached to an inpcb", __func__));
193 KASSERT(!(toep->flags & TPF_CPL_PENDING),
194 ("%s: CPL pending", __func__));
196 ddp_uninit_toep(toep);
201 * Set up the socket for TCP offload.
204 offload_socket(struct socket *so, struct toepcb *toep)
206 struct tom_data *td = toep->td;
207 struct inpcb *inp = sotoinpcb(so);
208 struct tcpcb *tp = intotcpcb(inp);
211 INP_WLOCK_ASSERT(inp);
216 sb->sb_flags |= SB_NOCOALESCE;
220 sb->sb_flags |= SB_NOCOALESCE;
221 if (inp->inp_vflag & INP_IPV6)
222 so->so_proto = &toe6_protosw;
224 so->so_proto = &toe_protosw;
230 tp->t_flags |= TF_TOE;
232 /* Install an extra hold on inp */
234 toep->flags |= TPF_ATTACHED;
237 /* Add the TOE PCB to the active list */
238 mtx_lock(&td->toep_list_lock);
239 TAILQ_INSERT_HEAD(&td->toep_list, toep, link);
240 mtx_unlock(&td->toep_list_lock);
243 /* This is _not_ the normal way to "unoffload" a socket. */
245 undo_offload_socket(struct socket *so)
247 struct inpcb *inp = sotoinpcb(so);
248 struct tcpcb *tp = intotcpcb(inp);
249 struct toepcb *toep = tp->t_toe;
250 struct tom_data *td = toep->td;
253 INP_WLOCK_ASSERT(inp);
257 sb->sb_flags &= ~SB_NOCOALESCE;
261 sb->sb_flags &= ~SB_NOCOALESCE;
266 tp->t_flags &= ~TF_TOE;
269 toep->flags &= ~TPF_ATTACHED;
270 if (in_pcbrele_wlocked(inp))
271 panic("%s: inp freed.", __func__);
273 mtx_lock(&td->toep_list_lock);
274 TAILQ_REMOVE(&td->toep_list, toep, link);
275 mtx_unlock(&td->toep_list_lock);
279 release_offload_resources(struct toepcb *toep)
281 struct tom_data *td = toep->td;
282 struct adapter *sc = td_adapter(td);
285 KASSERT(!(toep->flags & TPF_CPL_PENDING),
286 ("%s: %p has CPL pending.", __func__, toep));
287 KASSERT(!(toep->flags & TPF_ATTACHED),
288 ("%s: %p is still attached.", __func__, toep));
290 CTR5(KTR_CXGBE, "%s: toep %p (tid %d, l2te %p, ce %p)",
291 __func__, toep, tid, toep->l2te, toep->ce);
294 * These queues should have been emptied at approximately the same time
295 * that a normal connection's socket's so_snd would have been purged or
296 * drained. Do _not_ clean up here.
298 MPASS(mbufq_len(&toep->ulp_pduq) == 0);
299 MPASS(mbufq_len(&toep->ulp_pdu_reclaimq) == 0);
301 ddp_assert_empty(toep);
305 t4_l2t_release(toep->l2te);
308 remove_tid(sc, tid, toep->ce ? 2 : 1);
309 release_tid(sc, tid, toep->ctrlq);
313 release_lip(td, toep->ce);
315 mtx_lock(&td->toep_list_lock);
316 TAILQ_REMOVE(&td->toep_list, toep, link);
317 mtx_unlock(&td->toep_list_lock);
323 * The kernel is done with the TCP PCB and this is our opportunity to unhook the
324 * toepcb hanging off of it. If the TOE driver is also done with the toepcb (no
325 * pending CPL) then it is time to release all resources tied to the toepcb.
327 * Also gets called when an offloaded active open fails and the TOM wants the
328 * kernel to take the TCP PCB back.
331 t4_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp)
333 #if defined(KTR) || defined(INVARIANTS)
334 struct inpcb *inp = tp->t_inpcb;
336 struct toepcb *toep = tp->t_toe;
338 INP_WLOCK_ASSERT(inp);
340 KASSERT(toep != NULL, ("%s: toep is NULL", __func__));
341 KASSERT(toep->flags & TPF_ATTACHED,
342 ("%s: not attached", __func__));
345 if (tp->t_state == TCPS_SYN_SENT) {
346 CTR6(KTR_CXGBE, "%s: atid %d, toep %p (0x%x), inp %p (0x%x)",
347 __func__, toep->tid, toep, toep->flags, inp,
351 "t4_pcb_detach: tid %d (%s), toep %p (0x%x), inp %p (0x%x)",
352 toep->tid, tcpstates[tp->t_state], toep, toep->flags, inp,
358 tp->t_flags &= ~TF_TOE;
359 toep->flags &= ~TPF_ATTACHED;
361 if (!(toep->flags & TPF_CPL_PENDING))
362 release_offload_resources(toep);
366 * setsockopt handler.
369 t4_ctloutput(struct toedev *tod, struct tcpcb *tp, int dir, int name)
371 struct adapter *sc = tod->tod_softc;
372 struct toepcb *toep = tp->t_toe;
377 CTR4(KTR_CXGBE, "%s: tp %p, dir %u, name %u", __func__, tp, dir, name);
381 t4_set_tcb_field(sc, toep->ctrlq, toep->tid, W_TCB_T_FLAGS,
382 V_TF_NAGLE(1), V_TF_NAGLE(tp->t_flags & TF_NODELAY ? 0 : 1),
383 0, 0, toep->ofld_rxq->iq.abs_id);
391 * The TOE driver will not receive any more CPLs for the tid associated with the
392 * toepcb; release the hold on the inpcb.
395 final_cpl_received(struct toepcb *toep)
397 struct inpcb *inp = toep->inp;
399 KASSERT(inp != NULL, ("%s: inp is NULL", __func__));
400 INP_WLOCK_ASSERT(inp);
401 KASSERT(toep->flags & TPF_CPL_PENDING,
402 ("%s: CPL not pending already?", __func__));
404 CTR6(KTR_CXGBE, "%s: tid %d, toep %p (0x%x), inp %p (0x%x)",
405 __func__, toep->tid, toep, toep->flags, inp, inp->inp_flags);
407 if (toep->ulp_mode == ULP_MODE_TCPDDP)
408 release_ddp_resources(toep);
410 toep->flags &= ~TPF_CPL_PENDING;
411 mbufq_drain(&toep->ulp_pdu_reclaimq);
413 if (!(toep->flags & TPF_ATTACHED))
414 release_offload_resources(toep);
416 if (!in_pcbrele_wlocked(inp))
421 insert_tid(struct adapter *sc, int tid, void *ctx, int ntids)
423 struct tid_info *t = &sc->tids;
425 t->tid_tab[tid] = ctx;
426 atomic_add_int(&t->tids_in_use, ntids);
430 lookup_tid(struct adapter *sc, int tid)
432 struct tid_info *t = &sc->tids;
434 return (t->tid_tab[tid]);
438 update_tid(struct adapter *sc, int tid, void *ctx)
440 struct tid_info *t = &sc->tids;
442 t->tid_tab[tid] = ctx;
446 remove_tid(struct adapter *sc, int tid, int ntids)
448 struct tid_info *t = &sc->tids;
450 t->tid_tab[tid] = NULL;
451 atomic_subtract_int(&t->tids_in_use, ntids);
455 release_tid(struct adapter *sc, int tid, struct sge_wrq *ctrlq)
458 struct cpl_tid_release *req;
460 wr = alloc_wrqe(sizeof(*req), ctrlq);
462 queue_tid_release(sc, tid); /* defer */
467 INIT_TP_WR_MIT_CPL(req, CPL_TID_RELEASE, tid);
473 queue_tid_release(struct adapter *sc, int tid)
476 CXGBE_UNIMPLEMENTED("deferred tid release");
480 * What mtu_idx to use, given a 4-tuple and/or an MSS cap
483 find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc, int pmss)
485 unsigned short *mtus = &sc->params.mtus[0];
488 KASSERT(inc != NULL || pmss > 0,
489 ("%s: at least one of inc/pmss must be specified", __func__));
491 mss = inc ? tcp_mssopt(inc) : pmss;
492 if (pmss > 0 && mss > pmss)
495 if (inc->inc_flags & INC_ISIPV6)
496 n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr);
498 n = sizeof(struct ip) + sizeof(struct tcphdr);
500 for (i = 0; i < NMTUS - 1 && mtus[i + 1] <= mss + n; i++)
507 * Determine the receive window size for a socket.
510 select_rcv_wnd(struct socket *so)
514 SOCKBUF_LOCK_ASSERT(&so->so_rcv);
516 wnd = sbspace(&so->so_rcv);
517 if (wnd < MIN_RCV_WND)
520 return min(wnd, MAX_RCV_WND);
524 select_rcv_wscale(void)
527 unsigned long space = sb_max;
529 if (space > MAX_RCV_WND)
532 while (wscale < TCP_MAX_WINSHIFT && (TCP_MAXWIN << wscale) < space)
538 extern int always_keepalive;
541 * socket so could be a listening socket too.
544 calc_opt0(struct socket *so, struct vi_info *vi, struct l2t_entry *e,
545 int mtu_idx, int rscale, int rx_credits, int ulp_mode)
549 KASSERT(rx_credits <= M_RCV_BUFSIZ,
550 ("%s: rcv_bufsiz too high", __func__));
552 opt0 = F_TCAM_BYPASS | V_WND_SCALE(rscale) | V_MSS_IDX(mtu_idx) |
553 V_ULP_MODE(ulp_mode) | V_RCV_BUFSIZ(rx_credits);
556 struct inpcb *inp = sotoinpcb(so);
557 struct tcpcb *tp = intotcpcb(inp);
558 int keepalive = always_keepalive ||
559 so_options_get(so) & SO_KEEPALIVE;
561 opt0 |= V_NAGLE((tp->t_flags & TF_NODELAY) == 0);
562 opt0 |= V_KEEP_ALIVE(keepalive != 0);
566 opt0 |= V_L2T_IDX(e->idx);
569 opt0 |= V_SMAC_SEL(vi->smt_idx);
570 opt0 |= V_TX_CHAN(vi->pi->tx_chan);
573 return htobe64(opt0);
577 select_ntuple(struct vi_info *vi, struct l2t_entry *e)
579 struct adapter *sc = vi->pi->adapter;
580 struct tp_params *tp = &sc->params.tp;
581 uint16_t viid = vi->viid;
585 * Initialize each of the fields which we care about which are present
586 * in the Compressed Filter Tuple.
588 if (tp->vlan_shift >= 0 && e->vlan != CPL_L2T_VLAN_NONE)
589 ntuple |= (uint64_t)(F_FT_VLAN_VLD | e->vlan) << tp->vlan_shift;
591 if (tp->port_shift >= 0)
592 ntuple |= (uint64_t)e->lport << tp->port_shift;
594 if (tp->protocol_shift >= 0)
595 ntuple |= (uint64_t)IPPROTO_TCP << tp->protocol_shift;
597 if (tp->vnic_shift >= 0) {
598 uint32_t vf = G_FW_VIID_VIN(viid);
599 uint32_t pf = G_FW_VIID_PFN(viid);
600 uint32_t vld = G_FW_VIID_VIVLD(viid);
602 ntuple |= (uint64_t)(V_FT_VNID_ID_VF(vf) | V_FT_VNID_ID_PF(pf) |
603 V_FT_VNID_ID_VLD(vld)) << tp->vnic_shift;
607 return (htobe32((uint32_t)ntuple));
609 return (htobe64(V_FILTER_TUPLE(ntuple)));
613 set_tcpddp_ulp_mode(struct toepcb *toep)
616 toep->ulp_mode = ULP_MODE_TCPDDP;
617 toep->ddp_flags = DDP_OK;
621 negative_advice(int status)
624 return (status == CPL_ERR_RTX_NEG_ADVICE ||
625 status == CPL_ERR_PERSIST_NEG_ADVICE ||
626 status == CPL_ERR_KEEPALV_NEG_ADVICE);
630 alloc_tid_tabs(struct tid_info *t)
635 size = t->ntids * sizeof(*t->tid_tab) +
636 t->natids * sizeof(*t->atid_tab) +
637 t->nstids * sizeof(*t->stid_tab);
639 t->tid_tab = malloc(size, M_CXGBE, M_ZERO | M_NOWAIT);
640 if (t->tid_tab == NULL)
643 mtx_init(&t->atid_lock, "atid lock", NULL, MTX_DEF);
644 t->atid_tab = (union aopen_entry *)&t->tid_tab[t->ntids];
645 t->afree = t->atid_tab;
647 for (i = 1; i < t->natids; i++)
648 t->atid_tab[i - 1].next = &t->atid_tab[i];
649 t->atid_tab[t->natids - 1].next = NULL;
651 mtx_init(&t->stid_lock, "stid lock", NULL, MTX_DEF);
652 t->stid_tab = (struct listen_ctx **)&t->atid_tab[t->natids];
654 TAILQ_INIT(&t->stids);
655 t->nstids_free_head = t->nstids;
657 atomic_store_rel_int(&t->tids_in_use, 0);
663 free_tid_tabs(struct tid_info *t)
665 KASSERT(t->tids_in_use == 0,
666 ("%s: %d tids still in use.", __func__, t->tids_in_use));
667 KASSERT(t->atids_in_use == 0,
668 ("%s: %d atids still in use.", __func__, t->atids_in_use));
669 KASSERT(t->stids_in_use == 0,
670 ("%s: %d tids still in use.", __func__, t->stids_in_use));
672 free(t->tid_tab, M_CXGBE);
675 if (mtx_initialized(&t->atid_lock))
676 mtx_destroy(&t->atid_lock);
677 if (mtx_initialized(&t->stid_lock))
678 mtx_destroy(&t->stid_lock);
682 add_lip(struct adapter *sc, struct in6_addr *lip)
684 struct fw_clip_cmd c;
686 ASSERT_SYNCHRONIZED_OP(sc);
687 /* mtx_assert(&td->clip_table_lock, MA_OWNED); */
689 memset(&c, 0, sizeof(c));
690 c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST |
692 c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_ALLOC | FW_LEN16(c));
693 c.ip_hi = *(uint64_t *)&lip->s6_addr[0];
694 c.ip_lo = *(uint64_t *)&lip->s6_addr[8];
696 return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c));
700 delete_lip(struct adapter *sc, struct in6_addr *lip)
702 struct fw_clip_cmd c;
704 ASSERT_SYNCHRONIZED_OP(sc);
705 /* mtx_assert(&td->clip_table_lock, MA_OWNED); */
707 memset(&c, 0, sizeof(c));
708 c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST |
710 c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_FREE | FW_LEN16(c));
711 c.ip_hi = *(uint64_t *)&lip->s6_addr[0];
712 c.ip_lo = *(uint64_t *)&lip->s6_addr[8];
714 return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c));
717 static struct clip_entry *
718 search_lip(struct tom_data *td, struct in6_addr *lip)
720 struct clip_entry *ce;
722 mtx_assert(&td->clip_table_lock, MA_OWNED);
724 TAILQ_FOREACH(ce, &td->clip_table, link) {
725 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip))
733 hold_lip(struct tom_data *td, struct in6_addr *lip, struct clip_entry *ce)
736 mtx_lock(&td->clip_table_lock);
738 ce = search_lip(td, lip);
741 mtx_unlock(&td->clip_table_lock);
747 release_lip(struct tom_data *td, struct clip_entry *ce)
750 mtx_lock(&td->clip_table_lock);
751 KASSERT(search_lip(td, &ce->lip) == ce,
752 ("%s: CLIP entry %p p not in CLIP table.", __func__, ce));
753 KASSERT(ce->refcount > 0,
754 ("%s: CLIP entry %p has refcount 0", __func__, ce));
756 mtx_unlock(&td->clip_table_lock);
760 init_clip_table(struct adapter *sc, struct tom_data *td)
763 ASSERT_SYNCHRONIZED_OP(sc);
765 mtx_init(&td->clip_table_lock, "CLIP table lock", NULL, MTX_DEF);
766 TAILQ_INIT(&td->clip_table);
769 update_clip_table(sc, td);
773 update_clip(struct adapter *sc, void *arg __unused)
776 if (begin_synchronized_op(sc, NULL, HOLD_LOCK, "t4tomuc"))
779 if (uld_active(sc, ULD_TOM))
780 update_clip_table(sc, sc->tom_softc);
782 end_synchronized_op(sc, LOCK_HELD);
786 t4_clip_task(void *arg, int count)
789 t4_iterate(update_clip, NULL);
793 update_clip_table(struct adapter *sc, struct tom_data *td)
795 struct rm_priotracker in6_ifa_tracker;
796 struct in6_ifaddr *ia;
797 struct in6_addr *lip, tlip;
798 struct clip_head stale;
799 struct clip_entry *ce, *ce_temp;
804 ASSERT_SYNCHRONIZED_OP(sc);
806 IN6_IFADDR_RLOCK(&in6_ifa_tracker);
807 mtx_lock(&td->clip_table_lock);
809 gen = atomic_load_acq_int(&in6_ifaddr_gen);
810 if (gen == td->clip_gen)
814 TAILQ_CONCAT(&stale, &td->clip_table, link);
817 * last_vnet optimizes the common cases where all if_vnet = NULL (no
818 * VIMAGE) or all if_vnet = vnet0.
820 last_vnet = (uintptr_t)(-1);
822 for_each_vi(sc->port[i], j, vi) {
823 if (last_vnet == (uintptr_t)vi->ifp->if_vnet)
826 /* XXX: races with if_vmove */
827 CURVNET_SET(vi->ifp->if_vnet);
828 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
829 lip = &ia->ia_addr.sin6_addr;
831 KASSERT(!IN6_IS_ADDR_MULTICAST(lip),
832 ("%s: mcast address in in6_ifaddr list", __func__));
834 if (IN6_IS_ADDR_LOOPBACK(lip))
836 if (IN6_IS_SCOPE_EMBED(lip)) {
837 /* Remove the embedded scope */
843 * XXX: how to weed out the link local address for the
844 * loopback interface? It's fe80::1 usually (always?).
848 * If it's in the main list then we already know it's
851 TAILQ_FOREACH(ce, &td->clip_table, link) {
852 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip))
857 * If it's in the stale list we should move it to the
860 TAILQ_FOREACH(ce, &stale, link) {
861 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip)) {
862 TAILQ_REMOVE(&stale, ce, link);
863 TAILQ_INSERT_TAIL(&td->clip_table, ce,
869 /* A new IP6 address; add it to the CLIP table */
870 ce = malloc(sizeof(*ce), M_CXGBE, M_NOWAIT);
871 memcpy(&ce->lip, lip, sizeof(ce->lip));
873 rc = add_lip(sc, lip);
875 TAILQ_INSERT_TAIL(&td->clip_table, ce, link);
877 char ip[INET6_ADDRSTRLEN];
879 inet_ntop(AF_INET6, &ce->lip, &ip[0],
881 log(LOG_ERR, "%s: could not add %s (%d)\n",
889 last_vnet = (uintptr_t)vi->ifp->if_vnet;
893 * Remove stale addresses (those no longer in V_in6_ifaddrhead) that are
894 * no longer referenced by the driver.
896 TAILQ_FOREACH_SAFE(ce, &stale, link, ce_temp) {
897 if (ce->refcount == 0) {
898 rc = delete_lip(sc, &ce->lip);
900 TAILQ_REMOVE(&stale, ce, link);
903 char ip[INET6_ADDRSTRLEN];
905 inet_ntop(AF_INET6, &ce->lip, &ip[0],
907 log(LOG_ERR, "%s: could not delete %s (%d)\n",
912 /* The ones that are still referenced need to stay in the CLIP table */
913 TAILQ_CONCAT(&td->clip_table, &stale, link);
917 mtx_unlock(&td->clip_table_lock);
918 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker);
922 destroy_clip_table(struct adapter *sc, struct tom_data *td)
924 struct clip_entry *ce, *ce_temp;
926 if (mtx_initialized(&td->clip_table_lock)) {
927 mtx_lock(&td->clip_table_lock);
928 TAILQ_FOREACH_SAFE(ce, &td->clip_table, link, ce_temp) {
929 KASSERT(ce->refcount == 0,
930 ("%s: CLIP entry %p still in use (%d)", __func__,
932 TAILQ_REMOVE(&td->clip_table, ce, link);
933 delete_lip(sc, &ce->lip);
936 mtx_unlock(&td->clip_table_lock);
937 mtx_destroy(&td->clip_table_lock);
942 free_tom_data(struct adapter *sc, struct tom_data *td)
945 ASSERT_SYNCHRONIZED_OP(sc);
947 KASSERT(TAILQ_EMPTY(&td->toep_list),
948 ("%s: TOE PCB list is not empty.", __func__));
949 KASSERT(td->lctx_count == 0,
950 ("%s: lctx hash table is not empty.", __func__));
952 t4_free_ppod_region(&td->pr);
953 destroy_clip_table(sc, td);
955 if (td->listen_mask != 0)
956 hashdestroy(td->listen_hash, M_CXGBE, td->listen_mask);
958 if (mtx_initialized(&td->unsent_wr_lock))
959 mtx_destroy(&td->unsent_wr_lock);
960 if (mtx_initialized(&td->lctx_hash_lock))
961 mtx_destroy(&td->lctx_hash_lock);
962 if (mtx_initialized(&td->toep_list_lock))
963 mtx_destroy(&td->toep_list_lock);
965 free_tid_tabs(&sc->tids);
970 reclaim_wr_resources(void *arg, int count)
972 struct tom_data *td = arg;
973 STAILQ_HEAD(, wrqe) twr_list = STAILQ_HEAD_INITIALIZER(twr_list);
974 struct cpl_act_open_req *cpl;
979 mtx_lock(&td->unsent_wr_lock);
980 STAILQ_SWAP(&td->unsent_wr_list, &twr_list, wrqe);
981 mtx_unlock(&td->unsent_wr_lock);
983 while ((wr = STAILQ_FIRST(&twr_list)) != NULL) {
984 STAILQ_REMOVE_HEAD(&twr_list, link);
987 opcode = GET_OPCODE(cpl);
990 case CPL_ACT_OPEN_REQ:
991 case CPL_ACT_OPEN_REQ6:
992 atid = G_TID_TID(be32toh(OPCODE_TID(cpl)));
995 CTR2(KTR_CXGBE, "%s: atid %u ", __func__, atid);
996 act_open_failure_cleanup(sc, atid, EHOSTUNREACH);
1000 log(LOG_ERR, "%s: leaked work request %p, wr_len %d, "
1001 "opcode %x\n", __func__, wr, wr->wr_len, opcode);
1002 /* WR not freed here; go look at it with a debugger. */
1008 * Ground control to Major TOM
1009 * Commencing countdown, engines on
1012 t4_tom_activate(struct adapter *sc)
1014 struct tom_data *td;
1017 struct sge_ofld_rxq *ofld_rxq;
1020 ASSERT_SYNCHRONIZED_OP(sc);
1022 /* per-adapter softc for TOM */
1023 td = malloc(sizeof(*td), M_CXGBE, M_ZERO | M_NOWAIT);
1027 /* List of TOE PCBs and associated lock */
1028 mtx_init(&td->toep_list_lock, "PCB list lock", NULL, MTX_DEF);
1029 TAILQ_INIT(&td->toep_list);
1031 /* Listen context */
1032 mtx_init(&td->lctx_hash_lock, "lctx hash lock", NULL, MTX_DEF);
1033 td->listen_hash = hashinit_flags(LISTEN_HASH_SIZE, M_CXGBE,
1034 &td->listen_mask, HASH_NOWAIT);
1036 /* List of WRs for which L2 resolution failed */
1037 mtx_init(&td->unsent_wr_lock, "Unsent WR list lock", NULL, MTX_DEF);
1038 STAILQ_INIT(&td->unsent_wr_list);
1039 TASK_INIT(&td->reclaim_wr_resources, 0, reclaim_wr_resources, td);
1042 rc = alloc_tid_tabs(&sc->tids);
1046 rc = t4_init_ppod_region(&td->pr, &sc->vres.ddp,
1047 t4_read_reg(sc, A_ULP_RX_TDDP_PSZ), "TDDP page pods");
1050 t4_set_reg_field(sc, A_ULP_RX_TDDP_TAGMASK,
1051 V_TDDPTAGMASK(M_TDDPTAGMASK), td->pr.pr_tag_mask);
1053 /* CLIP table for IPv6 offload */
1054 init_clip_table(sc, td);
1059 tod->tod_softc = sc;
1060 tod->tod_connect = t4_connect;
1061 tod->tod_listen_start = t4_listen_start;
1062 tod->tod_listen_stop = t4_listen_stop;
1063 tod->tod_rcvd = t4_rcvd;
1064 tod->tod_output = t4_tod_output;
1065 tod->tod_send_rst = t4_send_rst;
1066 tod->tod_send_fin = t4_send_fin;
1067 tod->tod_pcb_detach = t4_pcb_detach;
1068 tod->tod_l2_update = t4_l2_update;
1069 tod->tod_syncache_added = t4_syncache_added;
1070 tod->tod_syncache_removed = t4_syncache_removed;
1071 tod->tod_syncache_respond = t4_syncache_respond;
1072 tod->tod_offload_socket = t4_offload_socket;
1073 tod->tod_ctloutput = t4_ctloutput;
1075 for_each_port(sc, i) {
1076 for_each_vi(sc->port[i], v, vi) {
1077 TOEDEV(vi->ifp) = &td->tod;
1078 for_each_ofld_rxq(vi, j, ofld_rxq) {
1079 ofld_rxq->iq.set_tcb_rpl = do_set_tcb_rpl;
1080 ofld_rxq->iq.l2t_write_rpl = do_l2t_write_rpl2;
1086 register_toedev(sc->tom_softc);
1090 free_tom_data(sc, td);
1095 t4_tom_deactivate(struct adapter *sc)
1098 struct tom_data *td = sc->tom_softc;
1100 ASSERT_SYNCHRONIZED_OP(sc);
1103 return (0); /* XXX. KASSERT? */
1105 if (sc->offload_map != 0)
1106 return (EBUSY); /* at least one port has IFCAP_TOE enabled */
1108 if (uld_active(sc, ULD_IWARP) || uld_active(sc, ULD_ISCSI))
1109 return (EBUSY); /* both iWARP and iSCSI rely on the TOE. */
1111 mtx_lock(&td->toep_list_lock);
1112 if (!TAILQ_EMPTY(&td->toep_list))
1114 mtx_unlock(&td->toep_list_lock);
1116 mtx_lock(&td->lctx_hash_lock);
1117 if (td->lctx_count > 0)
1119 mtx_unlock(&td->lctx_hash_lock);
1121 taskqueue_drain(taskqueue_thread, &td->reclaim_wr_resources);
1122 mtx_lock(&td->unsent_wr_lock);
1123 if (!STAILQ_EMPTY(&td->unsent_wr_list))
1125 mtx_unlock(&td->unsent_wr_lock);
1128 unregister_toedev(sc->tom_softc);
1129 free_tom_data(sc, td);
1130 sc->tom_softc = NULL;
1137 t4_tom_ifaddr_event(void *arg __unused, struct ifnet *ifp)
1140 atomic_add_rel_int(&in6_ifaddr_gen, 1);
1141 taskqueue_enqueue_timeout(taskqueue_thread, &clip_task, -hz / 4);
1145 t4_aio_queue_tom(struct socket *so, struct kaiocb *job)
1147 struct tcpcb *tp = so_sototcpcb(so);
1148 struct toepcb *toep = tp->t_toe;
1151 if (toep->ulp_mode == ULP_MODE_TCPDDP) {
1152 error = t4_aio_queue_ddp(so, job);
1153 if (error != EOPNOTSUPP)
1157 return (t4_aio_queue_aiotx(so, job));
1161 t4_tom_mod_load(void)
1164 struct protosw *tcp_protosw, *tcp6_protosw;
1167 t4_init_connect_cpl_handlers();
1168 t4_init_listen_cpl_handlers();
1169 t4_init_cpl_io_handlers();
1171 rc = t4_ddp_mod_load();
1175 tcp_protosw = pffindproto(PF_INET, IPPROTO_TCP, SOCK_STREAM);
1176 if (tcp_protosw == NULL)
1177 return (ENOPROTOOPT);
1178 bcopy(tcp_protosw, &toe_protosw, sizeof(toe_protosw));
1179 bcopy(tcp_protosw->pr_usrreqs, &toe_usrreqs, sizeof(toe_usrreqs));
1180 toe_usrreqs.pru_aio_queue = t4_aio_queue_tom;
1181 toe_protosw.pr_usrreqs = &toe_usrreqs;
1183 tcp6_protosw = pffindproto(PF_INET6, IPPROTO_TCP, SOCK_STREAM);
1184 if (tcp6_protosw == NULL)
1185 return (ENOPROTOOPT);
1186 bcopy(tcp6_protosw, &toe6_protosw, sizeof(toe6_protosw));
1187 bcopy(tcp6_protosw->pr_usrreqs, &toe6_usrreqs, sizeof(toe6_usrreqs));
1188 toe6_usrreqs.pru_aio_queue = t4_aio_queue_tom;
1189 toe6_protosw.pr_usrreqs = &toe6_usrreqs;
1191 TIMEOUT_TASK_INIT(taskqueue_thread, &clip_task, 0, t4_clip_task, NULL);
1192 ifaddr_evhandler = EVENTHANDLER_REGISTER(ifaddr_event,
1193 t4_tom_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY);
1195 rc = t4_register_uld(&tom_uld_info);
1197 t4_tom_mod_unload();
1203 tom_uninit(struct adapter *sc, void *arg __unused)
1205 if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4tomun"))
1208 /* Try to free resources (works only if no port has IFCAP_TOE) */
1209 if (uld_active(sc, ULD_TOM))
1210 t4_deactivate_uld(sc, ULD_TOM);
1212 end_synchronized_op(sc, 0);
1216 t4_tom_mod_unload(void)
1218 t4_iterate(tom_uninit, NULL);
1220 if (t4_unregister_uld(&tom_uld_info) == EBUSY)
1223 if (ifaddr_evhandler) {
1224 EVENTHANDLER_DEREGISTER(ifaddr_event, ifaddr_evhandler);
1225 taskqueue_cancel_timeout(taskqueue_thread, &clip_task, NULL);
1228 t4_ddp_mod_unload();
1230 t4_uninit_connect_cpl_handlers();
1231 t4_uninit_listen_cpl_handlers();
1232 t4_uninit_cpl_io_handlers();
1236 #endif /* TCP_OFFLOAD */
1239 t4_tom_modevent(module_t mod, int cmd, void *arg)
1246 rc = t4_tom_mod_load();
1250 rc = t4_tom_mod_unload();
1257 printf("t4_tom: compiled without TCP_OFFLOAD support.\n");
1263 static moduledata_t t4_tom_moddata= {
1269 MODULE_VERSION(t4_tom, 1);
1270 MODULE_DEPEND(t4_tom, toecore, 1, 1, 1);
1271 MODULE_DEPEND(t4_tom, t4nex, 1, 1, 1);
1272 DECLARE_MODULE(t4_tom, t4_tom_moddata, SI_SUB_EXEC, SI_ORDER_ANY);