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>
39 #include <sys/module.h>
40 #include <sys/protosw.h>
41 #include <sys/domain.h>
42 #include <sys/socket.h>
43 #include <sys/socketvar.h>
44 #include <sys/taskqueue.h>
46 #include <netinet/in.h>
47 #include <netinet/in_pcb.h>
48 #include <netinet/in_var.h>
49 #include <netinet/ip.h>
50 #include <netinet/ip6.h>
51 #include <netinet/tcp_var.h>
52 #include <netinet6/scope6_var.h>
54 #include <netinet/tcp_fsm.h>
55 #include <netinet/toecore.h>
58 #include "common/common.h"
59 #include "common/t4_msg.h"
60 #include "common/t4_regs.h"
61 #include "common/t4_regs_values.h"
62 #include "common/t4_tcb.h"
63 #include "tom/t4_tom_l2t.h"
64 #include "tom/t4_tom.h"
66 static struct protosw ddp_protosw;
67 static struct pr_usrreqs ddp_usrreqs;
69 static struct protosw ddp6_protosw;
70 static struct pr_usrreqs ddp6_usrreqs;
73 static int t4_tom_mod_load(void);
74 static int t4_tom_mod_unload(void);
75 static int t4_tom_modevent(module_t, int, void *);
77 /* ULD ops and helpers */
78 static int t4_tom_activate(struct adapter *);
79 static int t4_tom_deactivate(struct adapter *);
81 static struct uld_info tom_uld_info = {
83 .activate = t4_tom_activate,
84 .deactivate = t4_tom_deactivate,
87 static void queue_tid_release(struct adapter *, int);
88 static void release_offload_resources(struct toepcb *);
89 static int alloc_tid_tabs(struct tid_info *);
90 static void free_tid_tabs(struct tid_info *);
91 static int add_lip(struct adapter *, struct in6_addr *);
92 static int delete_lip(struct adapter *, struct in6_addr *);
93 static struct clip_entry *search_lip(struct tom_data *, struct in6_addr *);
94 static void init_clip_table(struct adapter *, struct tom_data *);
95 static void update_clip(struct adapter *, void *);
96 static void t4_clip_task(void *, int);
97 static void update_clip_table(struct adapter *, struct tom_data *);
98 static void destroy_clip_table(struct adapter *, struct tom_data *);
99 static void free_tom_data(struct adapter *, struct tom_data *);
101 static int in6_ifaddr_gen;
102 static eventhandler_tag ifaddr_evhandler;
103 static struct timeout_task clip_task;
106 alloc_toepcb(struct port_info *pi, int txqid, int rxqid, int flags)
108 struct adapter *sc = pi->adapter;
110 int tx_credits, txsd_total, len;
113 * The firmware counts tx work request credits in units of 16 bytes
114 * each. Reserve room for an ABORT_REQ so the driver never has to worry
115 * about tx credits if it wants to abort a connection.
117 tx_credits = sc->params.ofldq_wr_cred;
118 tx_credits -= howmany(sizeof(struct cpl_abort_req), 16);
121 * Shortest possible tx work request is a fw_ofld_tx_data_wr + 1 byte
122 * immediate payload, and firmware counts tx work request credits in
123 * units of 16 byte. Calculate the maximum work requests possible.
125 txsd_total = tx_credits /
126 howmany((sizeof(struct fw_ofld_tx_data_wr) + 1), 16);
129 txqid = (arc4random() % pi->nofldtxq) + pi->first_ofld_txq;
130 KASSERT(txqid >= pi->first_ofld_txq &&
131 txqid < pi->first_ofld_txq + pi->nofldtxq,
132 ("%s: txqid %d for port %p (first %d, n %d)", __func__, txqid, pi,
133 pi->first_ofld_txq, pi->nofldtxq));
136 rxqid = (arc4random() % pi->nofldrxq) + pi->first_ofld_rxq;
137 KASSERT(rxqid >= pi->first_ofld_rxq &&
138 rxqid < pi->first_ofld_rxq + pi->nofldrxq,
139 ("%s: rxqid %d for port %p (first %d, n %d)", __func__, rxqid, pi,
140 pi->first_ofld_rxq, pi->nofldrxq));
142 len = offsetof(struct toepcb, txsd) +
143 txsd_total * sizeof(struct ofld_tx_sdesc);
145 toep = malloc(len, M_CXGBE, M_ZERO | flags);
149 toep->td = sc->tom_softc;
151 toep->tx_total = tx_credits;
152 toep->tx_credits = tx_credits;
153 toep->ofld_txq = &sc->sge.ofld_txq[txqid];
154 toep->ofld_rxq = &sc->sge.ofld_rxq[rxqid];
155 toep->ctrlq = &sc->sge.ctrlq[pi->port_id];
156 toep->txsd_total = txsd_total;
157 toep->txsd_avail = txsd_total;
165 free_toepcb(struct toepcb *toep)
168 KASSERT(!(toep->flags & TPF_ATTACHED),
169 ("%s: attached to an inpcb", __func__));
170 KASSERT(!(toep->flags & TPF_CPL_PENDING),
171 ("%s: CPL pending", __func__));
177 * Set up the socket for TCP offload.
180 offload_socket(struct socket *so, struct toepcb *toep)
182 struct tom_data *td = toep->td;
183 struct inpcb *inp = sotoinpcb(so);
184 struct tcpcb *tp = intotcpcb(inp);
187 INP_WLOCK_ASSERT(inp);
192 sb->sb_flags |= SB_NOCOALESCE;
196 sb->sb_flags |= SB_NOCOALESCE;
197 if (toep->ulp_mode == ULP_MODE_TCPDDP) {
198 if (inp->inp_vflag & INP_IPV6)
199 so->so_proto = &ddp6_protosw;
201 so->so_proto = &ddp_protosw;
208 tp->t_flags |= TF_TOE;
210 /* Install an extra hold on inp */
212 toep->flags |= TPF_ATTACHED;
215 /* Add the TOE PCB to the active list */
216 mtx_lock(&td->toep_list_lock);
217 TAILQ_INSERT_HEAD(&td->toep_list, toep, link);
218 mtx_unlock(&td->toep_list_lock);
221 /* This is _not_ the normal way to "unoffload" a socket. */
223 undo_offload_socket(struct socket *so)
225 struct inpcb *inp = sotoinpcb(so);
226 struct tcpcb *tp = intotcpcb(inp);
227 struct toepcb *toep = tp->t_toe;
228 struct tom_data *td = toep->td;
231 INP_WLOCK_ASSERT(inp);
235 sb->sb_flags &= ~SB_NOCOALESCE;
239 sb->sb_flags &= ~SB_NOCOALESCE;
244 tp->t_flags &= ~TF_TOE;
247 toep->flags &= ~TPF_ATTACHED;
248 if (in_pcbrele_wlocked(inp))
249 panic("%s: inp freed.", __func__);
251 mtx_lock(&td->toep_list_lock);
252 TAILQ_REMOVE(&td->toep_list, toep, link);
253 mtx_unlock(&td->toep_list_lock);
257 release_offload_resources(struct toepcb *toep)
259 struct tom_data *td = toep->td;
260 struct adapter *sc = td_adapter(td);
263 KASSERT(!(toep->flags & TPF_CPL_PENDING),
264 ("%s: %p has CPL pending.", __func__, toep));
265 KASSERT(!(toep->flags & TPF_ATTACHED),
266 ("%s: %p is still attached.", __func__, toep));
268 CTR5(KTR_CXGBE, "%s: toep %p (tid %d, l2te %p, ce %p)",
269 __func__, toep, tid, toep->l2te, toep->ce);
271 if (toep->ulp_mode == ULP_MODE_TCPDDP)
272 release_ddp_resources(toep);
275 t4_l2t_release(toep->l2te);
279 release_tid(sc, tid, toep->ctrlq);
283 release_lip(td, toep->ce);
285 mtx_lock(&td->toep_list_lock);
286 TAILQ_REMOVE(&td->toep_list, toep, link);
287 mtx_unlock(&td->toep_list_lock);
293 * The kernel is done with the TCP PCB and this is our opportunity to unhook the
294 * toepcb hanging off of it. If the TOE driver is also done with the toepcb (no
295 * pending CPL) then it is time to release all resources tied to the toepcb.
297 * Also gets called when an offloaded active open fails and the TOM wants the
298 * kernel to take the TCP PCB back.
301 t4_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp)
303 #if defined(KTR) || defined(INVARIANTS)
304 struct inpcb *inp = tp->t_inpcb;
306 struct toepcb *toep = tp->t_toe;
308 INP_WLOCK_ASSERT(inp);
310 KASSERT(toep != NULL, ("%s: toep is NULL", __func__));
311 KASSERT(toep->flags & TPF_ATTACHED,
312 ("%s: not attached", __func__));
315 if (tp->t_state == TCPS_SYN_SENT) {
316 CTR6(KTR_CXGBE, "%s: atid %d, toep %p (0x%x), inp %p (0x%x)",
317 __func__, toep->tid, toep, toep->flags, inp,
321 "t4_pcb_detach: tid %d (%s), toep %p (0x%x), inp %p (0x%x)",
322 toep->tid, tcpstates[tp->t_state], toep, toep->flags, inp,
328 tp->t_flags &= ~TF_TOE;
329 toep->flags &= ~TPF_ATTACHED;
331 if (!(toep->flags & TPF_CPL_PENDING))
332 release_offload_resources(toep);
336 * setsockopt handler.
339 t4_ctloutput(struct toedev *tod, struct tcpcb *tp, int dir, int name)
341 struct adapter *sc = tod->tod_softc;
342 struct toepcb *toep = tp->t_toe;
347 CTR4(KTR_CXGBE, "%s: tp %p, dir %u, name %u", __func__, tp, dir, name);
351 t4_set_tcb_field(sc, toep, 1, W_TCB_T_FLAGS, V_TF_NAGLE(1),
352 V_TF_NAGLE(tp->t_flags & TF_NODELAY ? 0 : 1));
360 * The TOE driver will not receive any more CPLs for the tid associated with the
361 * toepcb; release the hold on the inpcb.
364 final_cpl_received(struct toepcb *toep)
366 struct inpcb *inp = toep->inp;
368 KASSERT(inp != NULL, ("%s: inp is NULL", __func__));
369 INP_WLOCK_ASSERT(inp);
370 KASSERT(toep->flags & TPF_CPL_PENDING,
371 ("%s: CPL not pending already?", __func__));
373 CTR6(KTR_CXGBE, "%s: tid %d, toep %p (0x%x), inp %p (0x%x)",
374 __func__, toep->tid, toep, toep->flags, inp, inp->inp_flags);
377 toep->flags &= ~TPF_CPL_PENDING;
379 if (!(toep->flags & TPF_ATTACHED))
380 release_offload_resources(toep);
382 if (!in_pcbrele_wlocked(inp))
387 insert_tid(struct adapter *sc, int tid, void *ctx)
389 struct tid_info *t = &sc->tids;
391 t->tid_tab[tid] = ctx;
392 atomic_add_int(&t->tids_in_use, 1);
396 lookup_tid(struct adapter *sc, int tid)
398 struct tid_info *t = &sc->tids;
400 return (t->tid_tab[tid]);
404 update_tid(struct adapter *sc, int tid, void *ctx)
406 struct tid_info *t = &sc->tids;
408 t->tid_tab[tid] = ctx;
412 remove_tid(struct adapter *sc, int tid)
414 struct tid_info *t = &sc->tids;
416 t->tid_tab[tid] = NULL;
417 atomic_subtract_int(&t->tids_in_use, 1);
421 release_tid(struct adapter *sc, int tid, struct sge_wrq *ctrlq)
424 struct cpl_tid_release *req;
426 wr = alloc_wrqe(sizeof(*req), ctrlq);
428 queue_tid_release(sc, tid); /* defer */
433 INIT_TP_WR_MIT_CPL(req, CPL_TID_RELEASE, tid);
439 queue_tid_release(struct adapter *sc, int tid)
442 CXGBE_UNIMPLEMENTED("deferred tid release");
446 * What mtu_idx to use, given a 4-tuple and/or an MSS cap
449 find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc, int pmss)
451 unsigned short *mtus = &sc->params.mtus[0];
454 KASSERT(inc != NULL || pmss > 0,
455 ("%s: at least one of inc/pmss must be specified", __func__));
457 mss = inc ? tcp_mssopt(inc) : pmss;
458 if (pmss > 0 && mss > pmss)
461 if (inc->inc_flags & INC_ISIPV6)
462 n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr);
464 n = sizeof(struct ip) + sizeof(struct tcphdr);
466 for (i = 0; i < NMTUS - 1 && mtus[i + 1] <= mss + n; i++)
473 * Determine the receive window size for a socket.
476 select_rcv_wnd(struct socket *so)
480 SOCKBUF_LOCK_ASSERT(&so->so_rcv);
482 wnd = sbspace(&so->so_rcv);
483 if (wnd < MIN_RCV_WND)
486 return min(wnd, MAX_RCV_WND);
490 select_rcv_wscale(void)
493 unsigned long space = sb_max;
495 if (space > MAX_RCV_WND)
498 while (wscale < TCP_MAX_WINSHIFT && (TCP_MAXWIN << wscale) < space)
504 extern int always_keepalive;
505 #define VIID_SMACIDX(v) (((unsigned int)(v) & 0x7f) << 1)
508 * socket so could be a listening socket too.
511 calc_opt0(struct socket *so, struct port_info *pi, struct l2t_entry *e,
512 int mtu_idx, int rscale, int rx_credits, int ulp_mode)
516 KASSERT(rx_credits <= M_RCV_BUFSIZ,
517 ("%s: rcv_bufsiz too high", __func__));
519 opt0 = F_TCAM_BYPASS | V_WND_SCALE(rscale) | V_MSS_IDX(mtu_idx) |
520 V_ULP_MODE(ulp_mode) | V_RCV_BUFSIZ(rx_credits);
523 struct inpcb *inp = sotoinpcb(so);
524 struct tcpcb *tp = intotcpcb(inp);
525 int keepalive = always_keepalive ||
526 so_options_get(so) & SO_KEEPALIVE;
528 opt0 |= V_NAGLE((tp->t_flags & TF_NODELAY) == 0);
529 opt0 |= V_KEEP_ALIVE(keepalive != 0);
533 opt0 |= V_L2T_IDX(e->idx);
536 opt0 |= V_SMAC_SEL(VIID_SMACIDX(pi->viid));
537 opt0 |= V_TX_CHAN(pi->tx_chan);
540 return htobe64(opt0);
544 select_ntuple(struct port_info *pi, struct l2t_entry *e)
546 struct adapter *sc = pi->adapter;
547 struct tp_params *tp = &sc->params.tp;
548 uint16_t viid = pi->viid;
552 * Initialize each of the fields which we care about which are present
553 * in the Compressed Filter Tuple.
555 if (tp->vlan_shift >= 0 && e->vlan != CPL_L2T_VLAN_NONE)
556 ntuple |= (uint64_t)(F_FT_VLAN_VLD | e->vlan) << tp->vlan_shift;
558 if (tp->port_shift >= 0)
559 ntuple |= (uint64_t)e->lport << tp->port_shift;
561 if (tp->protocol_shift >= 0)
562 ntuple |= (uint64_t)IPPROTO_TCP << tp->protocol_shift;
564 if (tp->vnic_shift >= 0) {
565 uint32_t vf = G_FW_VIID_VIN(viid);
566 uint32_t pf = G_FW_VIID_PFN(viid);
567 uint32_t vld = G_FW_VIID_VIVLD(viid);
569 ntuple |= (uint64_t)(V_FT_VNID_ID_VF(vf) | V_FT_VNID_ID_PF(pf) |
570 V_FT_VNID_ID_VLD(vld)) << tp->vnic_shift;
574 return (htobe32((uint32_t)ntuple));
576 return (htobe64(V_FILTER_TUPLE(ntuple)));
580 set_tcpddp_ulp_mode(struct toepcb *toep)
583 toep->ulp_mode = ULP_MODE_TCPDDP;
584 toep->ddp_flags = DDP_OK;
585 toep->ddp_score = DDP_LOW_SCORE;
589 negative_advice(int status)
592 return (status == CPL_ERR_RTX_NEG_ADVICE ||
593 status == CPL_ERR_PERSIST_NEG_ADVICE ||
594 status == CPL_ERR_KEEPALV_NEG_ADVICE);
598 alloc_tid_tabs(struct tid_info *t)
603 size = t->ntids * sizeof(*t->tid_tab) +
604 t->natids * sizeof(*t->atid_tab) +
605 t->nstids * sizeof(*t->stid_tab);
607 t->tid_tab = malloc(size, M_CXGBE, M_ZERO | M_NOWAIT);
608 if (t->tid_tab == NULL)
611 mtx_init(&t->atid_lock, "atid lock", NULL, MTX_DEF);
612 t->atid_tab = (union aopen_entry *)&t->tid_tab[t->ntids];
613 t->afree = t->atid_tab;
615 for (i = 1; i < t->natids; i++)
616 t->atid_tab[i - 1].next = &t->atid_tab[i];
617 t->atid_tab[t->natids - 1].next = NULL;
619 mtx_init(&t->stid_lock, "stid lock", NULL, MTX_DEF);
620 t->stid_tab = (struct listen_ctx **)&t->atid_tab[t->natids];
622 TAILQ_INIT(&t->stids);
623 t->nstids_free_head = t->nstids;
625 atomic_store_rel_int(&t->tids_in_use, 0);
631 free_tid_tabs(struct tid_info *t)
633 KASSERT(t->tids_in_use == 0,
634 ("%s: %d tids still in use.", __func__, t->tids_in_use));
635 KASSERT(t->atids_in_use == 0,
636 ("%s: %d atids still in use.", __func__, t->atids_in_use));
637 KASSERT(t->stids_in_use == 0,
638 ("%s: %d tids still in use.", __func__, t->stids_in_use));
640 free(t->tid_tab, M_CXGBE);
643 if (mtx_initialized(&t->atid_lock))
644 mtx_destroy(&t->atid_lock);
645 if (mtx_initialized(&t->stid_lock))
646 mtx_destroy(&t->stid_lock);
650 add_lip(struct adapter *sc, struct in6_addr *lip)
652 struct fw_clip_cmd c;
654 ASSERT_SYNCHRONIZED_OP(sc);
655 /* mtx_assert(&td->clip_table_lock, MA_OWNED); */
657 memset(&c, 0, sizeof(c));
658 c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST |
660 c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_ALLOC | FW_LEN16(c));
661 c.ip_hi = *(uint64_t *)&lip->s6_addr[0];
662 c.ip_lo = *(uint64_t *)&lip->s6_addr[8];
664 return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c));
668 delete_lip(struct adapter *sc, struct in6_addr *lip)
670 struct fw_clip_cmd c;
672 ASSERT_SYNCHRONIZED_OP(sc);
673 /* mtx_assert(&td->clip_table_lock, MA_OWNED); */
675 memset(&c, 0, sizeof(c));
676 c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST |
678 c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_FREE | FW_LEN16(c));
679 c.ip_hi = *(uint64_t *)&lip->s6_addr[0];
680 c.ip_lo = *(uint64_t *)&lip->s6_addr[8];
682 return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c));
685 static struct clip_entry *
686 search_lip(struct tom_data *td, struct in6_addr *lip)
688 struct clip_entry *ce;
690 mtx_assert(&td->clip_table_lock, MA_OWNED);
692 TAILQ_FOREACH(ce, &td->clip_table, link) {
693 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip))
701 hold_lip(struct tom_data *td, struct in6_addr *lip)
703 struct clip_entry *ce;
705 mtx_lock(&td->clip_table_lock);
706 ce = search_lip(td, lip);
709 mtx_unlock(&td->clip_table_lock);
715 release_lip(struct tom_data *td, struct clip_entry *ce)
718 mtx_lock(&td->clip_table_lock);
719 KASSERT(search_lip(td, &ce->lip) == ce,
720 ("%s: CLIP entry %p p not in CLIP table.", __func__, ce));
721 KASSERT(ce->refcount > 0,
722 ("%s: CLIP entry %p has refcount 0", __func__, ce));
724 mtx_unlock(&td->clip_table_lock);
728 init_clip_table(struct adapter *sc, struct tom_data *td)
731 ASSERT_SYNCHRONIZED_OP(sc);
733 mtx_init(&td->clip_table_lock, "CLIP table lock", NULL, MTX_DEF);
734 TAILQ_INIT(&td->clip_table);
737 update_clip_table(sc, td);
741 update_clip(struct adapter *sc, void *arg __unused)
744 if (begin_synchronized_op(sc, NULL, HOLD_LOCK, "t4tomuc"))
747 if (sc->flags & TOM_INIT_DONE)
748 update_clip_table(sc, sc->tom_softc);
750 end_synchronized_op(sc, LOCK_HELD);
754 t4_clip_task(void *arg, int count)
757 t4_iterate(update_clip, NULL);
761 update_clip_table(struct adapter *sc, struct tom_data *td)
763 struct in6_ifaddr *ia;
764 struct in6_addr *lip, tlip;
765 struct clip_head stale;
766 struct clip_entry *ce, *ce_temp;
767 int rc, gen = atomic_load_acq_int(&in6_ifaddr_gen);
769 ASSERT_SYNCHRONIZED_OP(sc);
772 mtx_lock(&td->clip_table_lock);
774 if (gen == td->clip_gen)
778 TAILQ_CONCAT(&stale, &td->clip_table, link);
780 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
781 lip = &ia->ia_addr.sin6_addr;
783 KASSERT(!IN6_IS_ADDR_MULTICAST(lip),
784 ("%s: mcast address in in6_ifaddr list", __func__));
786 if (IN6_IS_ADDR_LOOPBACK(lip))
788 if (IN6_IS_SCOPE_EMBED(lip)) {
789 /* Remove the embedded scope */
795 * XXX: how to weed out the link local address for the loopback
796 * interface? It's fe80::1 usually (always?).
800 * If it's in the main list then we already know it's not stale.
802 TAILQ_FOREACH(ce, &td->clip_table, link) {
803 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip))
808 * If it's in the stale list we should move it to the main list.
810 TAILQ_FOREACH(ce, &stale, link) {
811 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip)) {
812 TAILQ_REMOVE(&stale, ce, link);
813 TAILQ_INSERT_TAIL(&td->clip_table, ce, link);
818 /* A new IP6 address; add it to the CLIP table */
819 ce = malloc(sizeof(*ce), M_CXGBE, M_NOWAIT);
820 memcpy(&ce->lip, lip, sizeof(ce->lip));
822 rc = add_lip(sc, lip);
824 TAILQ_INSERT_TAIL(&td->clip_table, ce, link);
826 char ip[INET6_ADDRSTRLEN];
828 inet_ntop(AF_INET6, &ce->lip, &ip[0], sizeof(ip));
829 log(LOG_ERR, "%s: could not add %s (%d)\n",
838 * Remove stale addresses (those no longer in V_in6_ifaddrhead) that are
839 * no longer referenced by the driver.
841 TAILQ_FOREACH_SAFE(ce, &stale, link, ce_temp) {
842 if (ce->refcount == 0) {
843 rc = delete_lip(sc, &ce->lip);
845 TAILQ_REMOVE(&stale, ce, link);
848 char ip[INET6_ADDRSTRLEN];
850 inet_ntop(AF_INET6, &ce->lip, &ip[0],
852 log(LOG_ERR, "%s: could not delete %s (%d)\n",
857 /* The ones that are still referenced need to stay in the CLIP table */
858 TAILQ_CONCAT(&td->clip_table, &stale, link);
862 mtx_unlock(&td->clip_table_lock);
863 IN6_IFADDR_RUNLOCK();
867 destroy_clip_table(struct adapter *sc, struct tom_data *td)
869 struct clip_entry *ce, *ce_temp;
871 if (mtx_initialized(&td->clip_table_lock)) {
872 mtx_lock(&td->clip_table_lock);
873 TAILQ_FOREACH_SAFE(ce, &td->clip_table, link, ce_temp) {
874 KASSERT(ce->refcount == 0,
875 ("%s: CLIP entry %p still in use (%d)", __func__,
877 TAILQ_REMOVE(&td->clip_table, ce, link);
878 delete_lip(sc, &ce->lip);
881 mtx_unlock(&td->clip_table_lock);
882 mtx_destroy(&td->clip_table_lock);
887 free_tom_data(struct adapter *sc, struct tom_data *td)
890 ASSERT_SYNCHRONIZED_OP(sc);
892 KASSERT(TAILQ_EMPTY(&td->toep_list),
893 ("%s: TOE PCB list is not empty.", __func__));
894 KASSERT(td->lctx_count == 0,
895 ("%s: lctx hash table is not empty.", __func__));
897 t4_uninit_l2t_cpl_handlers(sc);
898 t4_uninit_cpl_io_handlers(sc);
899 t4_uninit_ddp(sc, td);
900 destroy_clip_table(sc, td);
902 if (td->listen_mask != 0)
903 hashdestroy(td->listen_hash, M_CXGBE, td->listen_mask);
905 if (mtx_initialized(&td->lctx_hash_lock))
906 mtx_destroy(&td->lctx_hash_lock);
907 if (mtx_initialized(&td->toep_list_lock))
908 mtx_destroy(&td->toep_list_lock);
910 free_tid_tabs(&sc->tids);
915 * Ground control to Major TOM
916 * Commencing countdown, engines on
919 t4_tom_activate(struct adapter *sc)
925 ASSERT_SYNCHRONIZED_OP(sc);
927 /* per-adapter softc for TOM */
928 td = malloc(sizeof(*td), M_CXGBE, M_ZERO | M_NOWAIT);
932 /* List of TOE PCBs and associated lock */
933 mtx_init(&td->toep_list_lock, "PCB list lock", NULL, MTX_DEF);
934 TAILQ_INIT(&td->toep_list);
937 mtx_init(&td->lctx_hash_lock, "lctx hash lock", NULL, MTX_DEF);
938 td->listen_hash = hashinit_flags(LISTEN_HASH_SIZE, M_CXGBE,
939 &td->listen_mask, HASH_NOWAIT);
942 rc = alloc_tid_tabs(&sc->tids);
946 /* DDP page pods and CPL handlers */
949 /* CLIP table for IPv6 offload */
950 init_clip_table(sc, td);
953 t4_init_connect_cpl_handlers(sc);
954 t4_init_l2t_cpl_handlers(sc);
955 t4_init_listen_cpl_handlers(sc);
956 t4_init_cpl_io_handlers(sc);
962 tod->tod_connect = t4_connect;
963 tod->tod_listen_start = t4_listen_start;
964 tod->tod_listen_stop = t4_listen_stop;
965 tod->tod_rcvd = t4_rcvd;
966 tod->tod_output = t4_tod_output;
967 tod->tod_send_rst = t4_send_rst;
968 tod->tod_send_fin = t4_send_fin;
969 tod->tod_pcb_detach = t4_pcb_detach;
970 tod->tod_l2_update = t4_l2_update;
971 tod->tod_syncache_added = t4_syncache_added;
972 tod->tod_syncache_removed = t4_syncache_removed;
973 tod->tod_syncache_respond = t4_syncache_respond;
974 tod->tod_offload_socket = t4_offload_socket;
975 tod->tod_ctloutput = t4_ctloutput;
978 TOEDEV(sc->port[i]->ifp) = &td->tod;
981 sc->flags |= TOM_INIT_DONE;
982 register_toedev(sc->tom_softc);
986 free_tom_data(sc, td);
991 t4_tom_deactivate(struct adapter *sc)
994 struct tom_data *td = sc->tom_softc;
996 ASSERT_SYNCHRONIZED_OP(sc);
999 return (0); /* XXX. KASSERT? */
1001 if (sc->offload_map != 0)
1002 return (EBUSY); /* at least one port has IFCAP_TOE enabled */
1004 mtx_lock(&td->toep_list_lock);
1005 if (!TAILQ_EMPTY(&td->toep_list))
1007 mtx_unlock(&td->toep_list_lock);
1009 mtx_lock(&td->lctx_hash_lock);
1010 if (td->lctx_count > 0)
1012 mtx_unlock(&td->lctx_hash_lock);
1015 unregister_toedev(sc->tom_softc);
1016 free_tom_data(sc, td);
1017 sc->tom_softc = NULL;
1018 sc->flags &= ~TOM_INIT_DONE;
1025 t4_tom_ifaddr_event(void *arg __unused, struct ifnet *ifp)
1028 atomic_add_rel_int(&in6_ifaddr_gen, 1);
1029 taskqueue_enqueue_timeout(taskqueue_thread, &clip_task, -hz / 4);
1033 t4_tom_mod_load(void)
1036 struct protosw *tcp_protosw, *tcp6_protosw;
1038 tcp_protosw = pffindproto(PF_INET, IPPROTO_TCP, SOCK_STREAM);
1039 if (tcp_protosw == NULL)
1040 return (ENOPROTOOPT);
1041 bcopy(tcp_protosw, &ddp_protosw, sizeof(ddp_protosw));
1042 bcopy(tcp_protosw->pr_usrreqs, &ddp_usrreqs, sizeof(ddp_usrreqs));
1043 ddp_usrreqs.pru_soreceive = t4_soreceive_ddp;
1044 ddp_protosw.pr_usrreqs = &ddp_usrreqs;
1046 tcp6_protosw = pffindproto(PF_INET6, IPPROTO_TCP, SOCK_STREAM);
1047 if (tcp6_protosw == NULL)
1048 return (ENOPROTOOPT);
1049 bcopy(tcp6_protosw, &ddp6_protosw, sizeof(ddp6_protosw));
1050 bcopy(tcp6_protosw->pr_usrreqs, &ddp6_usrreqs, sizeof(ddp6_usrreqs));
1051 ddp6_usrreqs.pru_soreceive = t4_soreceive_ddp;
1052 ddp6_protosw.pr_usrreqs = &ddp6_usrreqs;
1054 TIMEOUT_TASK_INIT(taskqueue_thread, &clip_task, 0, t4_clip_task, NULL);
1055 ifaddr_evhandler = EVENTHANDLER_REGISTER(ifaddr_event,
1056 t4_tom_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY);
1058 rc = t4_register_uld(&tom_uld_info);
1060 t4_tom_mod_unload();
1066 tom_uninit(struct adapter *sc, void *arg __unused)
1068 if (begin_synchronized_op(sc, NULL, HOLD_LOCK, "t4tomun"))
1071 /* Try to free resources (works only if no port has IFCAP_TOE) */
1072 if (sc->flags & TOM_INIT_DONE)
1073 t4_deactivate_uld(sc, ULD_TOM);
1075 end_synchronized_op(sc, LOCK_HELD);
1079 t4_tom_mod_unload(void)
1081 t4_iterate(tom_uninit, NULL);
1083 if (t4_unregister_uld(&tom_uld_info) == EBUSY)
1086 if (ifaddr_evhandler) {
1087 EVENTHANDLER_DEREGISTER(ifaddr_event, ifaddr_evhandler);
1088 taskqueue_cancel_timeout(taskqueue_thread, &clip_task, NULL);
1093 #endif /* TCP_OFFLOAD */
1096 t4_tom_modevent(module_t mod, int cmd, void *arg)
1103 rc = t4_tom_mod_load();
1107 rc = t4_tom_mod_unload();
1114 printf("t4_tom: compiled without TCP_OFFLOAD support.\n");
1120 static moduledata_t t4_tom_moddata= {
1126 MODULE_VERSION(t4_tom, 1);
1127 MODULE_DEPEND(t4_tom, toecore, 1, 1, 1);
1128 MODULE_DEPEND(t4_tom, t4nex, 1, 1, 1);
1129 DECLARE_MODULE(t4_tom, t4_tom_moddata, SI_SUB_EXEC, SI_ORDER_ANY);