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/limits.h>
40 #include <sys/module.h>
41 #include <sys/protosw.h>
42 #include <sys/domain.h>
43 #include <sys/socket.h>
44 #include <sys/socketvar.h>
45 #include <sys/taskqueue.h>
47 #include <netinet/in.h>
48 #include <netinet/in_pcb.h>
49 #include <netinet/in_var.h>
50 #include <netinet/ip.h>
51 #include <netinet/ip6.h>
52 #include <netinet/tcp_var.h>
53 #include <netinet6/scope6_var.h>
55 #include <netinet/tcp_fsm.h>
56 #include <netinet/tcp_timer.h>
57 #include <netinet/toecore.h>
60 #include "common/common.h"
61 #include "common/t4_msg.h"
62 #include "common/t4_regs.h"
63 #include "common/t4_regs_values.h"
64 #include "common/t4_tcb.h"
65 #include "tom/t4_tom_l2t.h"
66 #include "tom/t4_tom.h"
68 static struct protosw ddp_protosw;
69 static struct pr_usrreqs ddp_usrreqs;
71 static struct protosw ddp6_protosw;
72 static struct pr_usrreqs ddp6_usrreqs;
75 static int t4_tom_mod_load(void);
76 static int t4_tom_mod_unload(void);
77 static int t4_tom_modevent(module_t, int, void *);
79 /* ULD ops and helpers */
80 static int t4_tom_activate(struct adapter *);
81 static int t4_tom_deactivate(struct adapter *);
83 static struct uld_info tom_uld_info = {
85 .activate = t4_tom_activate,
86 .deactivate = t4_tom_deactivate,
89 static void queue_tid_release(struct adapter *, int);
90 static void release_offload_resources(struct toepcb *);
91 static int alloc_tid_tabs(struct tid_info *);
92 static void free_tid_tabs(struct tid_info *);
93 static int add_lip(struct adapter *, struct in6_addr *);
94 static int delete_lip(struct adapter *, struct in6_addr *);
95 static struct clip_entry *search_lip(struct tom_data *, struct in6_addr *);
96 static void init_clip_table(struct adapter *, struct tom_data *);
97 static void update_clip(struct adapter *, void *);
98 static void t4_clip_task(void *, int);
99 static void update_clip_table(struct adapter *, struct tom_data *);
100 static void destroy_clip_table(struct adapter *, struct tom_data *);
101 static void free_tom_data(struct adapter *, struct tom_data *);
102 static void reclaim_wr_resources(void *, int);
104 static int in6_ifaddr_gen;
105 static eventhandler_tag ifaddr_evhandler;
106 static struct timeout_task clip_task;
109 mbufq_init(struct mbufq *q, int limit)
112 q->head = q->tail = NULL;
116 mbufq_drain(struct mbufq *q)
120 while ((m = q->head) != NULL) {
121 q->head = m->m_nextpkt;
129 mbufq_len(const struct mbufq *q)
135 for (m = q->head; m != NULL; m = m->m_nextpkt)
142 alloc_toepcb(struct vi_info *vi, int txqid, int rxqid, int flags)
144 struct port_info *pi = vi->pi;
145 struct adapter *sc = pi->adapter;
147 int tx_credits, txsd_total, len;
150 * The firmware counts tx work request credits in units of 16 bytes
151 * each. Reserve room for an ABORT_REQ so the driver never has to worry
152 * about tx credits if it wants to abort a connection.
154 tx_credits = sc->params.ofldq_wr_cred;
155 tx_credits -= howmany(sizeof(struct cpl_abort_req), 16);
158 * Shortest possible tx work request is a fw_ofld_tx_data_wr + 1 byte
159 * immediate payload, and firmware counts tx work request credits in
160 * units of 16 byte. Calculate the maximum work requests possible.
162 txsd_total = tx_credits /
163 howmany(sizeof(struct fw_ofld_tx_data_wr) + 1, 16);
166 txqid = (arc4random() % vi->nofldtxq) + vi->first_ofld_txq;
167 KASSERT(txqid >= vi->first_ofld_txq &&
168 txqid < vi->first_ofld_txq + vi->nofldtxq,
169 ("%s: txqid %d for vi %p (first %d, n %d)", __func__, txqid, vi,
170 vi->first_ofld_txq, vi->nofldtxq));
173 rxqid = (arc4random() % vi->nofldrxq) + vi->first_ofld_rxq;
174 KASSERT(rxqid >= vi->first_ofld_rxq &&
175 rxqid < vi->first_ofld_rxq + vi->nofldrxq,
176 ("%s: rxqid %d for vi %p (first %d, n %d)", __func__, rxqid, vi,
177 vi->first_ofld_rxq, vi->nofldrxq));
179 len = offsetof(struct toepcb, txsd) +
180 txsd_total * sizeof(struct ofld_tx_sdesc);
182 toep = malloc(len, M_CXGBE, M_ZERO | flags);
186 toep->td = sc->tom_softc;
188 toep->tx_total = tx_credits;
189 toep->tx_credits = tx_credits;
190 toep->ofld_txq = &sc->sge.ofld_txq[txqid];
191 toep->ofld_rxq = &sc->sge.ofld_rxq[rxqid];
192 toep->ctrlq = &sc->sge.ctrlq[pi->port_id];
193 mbufq_init(&toep->ulp_pduq, INT_MAX);
194 mbufq_init(&toep->ulp_pdu_reclaimq, INT_MAX);
195 toep->txsd_total = txsd_total;
196 toep->txsd_avail = txsd_total;
204 free_toepcb(struct toepcb *toep)
207 KASSERT(!(toep->flags & TPF_ATTACHED),
208 ("%s: attached to an inpcb", __func__));
209 KASSERT(!(toep->flags & TPF_CPL_PENDING),
210 ("%s: CPL pending", __func__));
216 * Set up the socket for TCP offload.
219 offload_socket(struct socket *so, struct toepcb *toep)
221 struct tom_data *td = toep->td;
222 struct inpcb *inp = sotoinpcb(so);
223 struct tcpcb *tp = intotcpcb(inp);
226 INP_WLOCK_ASSERT(inp);
231 sb->sb_flags |= SB_NOCOALESCE;
235 sb->sb_flags |= SB_NOCOALESCE;
236 if (toep->ulp_mode == ULP_MODE_TCPDDP) {
237 if (inp->inp_vflag & INP_IPV6)
238 so->so_proto = &ddp6_protosw;
240 so->so_proto = &ddp_protosw;
247 tp->t_flags |= TF_TOE;
249 /* Install an extra hold on inp */
251 toep->flags |= TPF_ATTACHED;
254 /* Add the TOE PCB to the active list */
255 mtx_lock(&td->toep_list_lock);
256 TAILQ_INSERT_HEAD(&td->toep_list, toep, link);
257 mtx_unlock(&td->toep_list_lock);
260 /* This is _not_ the normal way to "unoffload" a socket. */
262 undo_offload_socket(struct socket *so)
264 struct inpcb *inp = sotoinpcb(so);
265 struct tcpcb *tp = intotcpcb(inp);
266 struct toepcb *toep = tp->t_toe;
267 struct tom_data *td = toep->td;
270 INP_WLOCK_ASSERT(inp);
274 sb->sb_flags &= ~SB_NOCOALESCE;
278 sb->sb_flags &= ~SB_NOCOALESCE;
283 tp->t_flags &= ~TF_TOE;
286 toep->flags &= ~TPF_ATTACHED;
287 if (in_pcbrele_wlocked(inp))
288 panic("%s: inp freed.", __func__);
290 mtx_lock(&td->toep_list_lock);
291 TAILQ_REMOVE(&td->toep_list, toep, link);
292 mtx_unlock(&td->toep_list_lock);
296 release_offload_resources(struct toepcb *toep)
298 struct tom_data *td = toep->td;
299 struct adapter *sc = td_adapter(td);
302 KASSERT(!(toep->flags & TPF_CPL_PENDING),
303 ("%s: %p has CPL pending.", __func__, toep));
304 KASSERT(!(toep->flags & TPF_ATTACHED),
305 ("%s: %p is still attached.", __func__, toep));
307 CTR5(KTR_CXGBE, "%s: toep %p (tid %d, l2te %p, ce %p)",
308 __func__, toep, tid, toep->l2te, toep->ce);
311 * These queues should have been emptied at approximately the same time
312 * that a normal connection's socket's so_snd would have been purged or
313 * drained. Do _not_ clean up here.
315 MPASS(mbufq_len(&toep->ulp_pduq) == 0);
316 MPASS(mbufq_len(&toep->ulp_pdu_reclaimq) == 0);
318 if (toep->ulp_mode == ULP_MODE_TCPDDP)
319 release_ddp_resources(toep);
322 t4_l2t_release(toep->l2te);
325 remove_tid(sc, tid, toep->ce ? 2 : 1);
326 release_tid(sc, tid, toep->ctrlq);
330 release_lip(td, toep->ce);
332 mtx_lock(&td->toep_list_lock);
333 TAILQ_REMOVE(&td->toep_list, toep, link);
334 mtx_unlock(&td->toep_list_lock);
340 * The kernel is done with the TCP PCB and this is our opportunity to unhook the
341 * toepcb hanging off of it. If the TOE driver is also done with the toepcb (no
342 * pending CPL) then it is time to release all resources tied to the toepcb.
344 * Also gets called when an offloaded active open fails and the TOM wants the
345 * kernel to take the TCP PCB back.
348 t4_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp)
350 #if defined(KTR) || defined(INVARIANTS)
351 struct inpcb *inp = tp->t_inpcb;
353 struct toepcb *toep = tp->t_toe;
355 INP_WLOCK_ASSERT(inp);
357 KASSERT(toep != NULL, ("%s: toep is NULL", __func__));
358 KASSERT(toep->flags & TPF_ATTACHED,
359 ("%s: not attached", __func__));
362 if (tp->t_state == TCPS_SYN_SENT) {
363 CTR6(KTR_CXGBE, "%s: atid %d, toep %p (0x%x), inp %p (0x%x)",
364 __func__, toep->tid, toep, toep->flags, inp,
368 "t4_pcb_detach: tid %d (%s), toep %p (0x%x), inp %p (0x%x)",
369 toep->tid, tcpstates[tp->t_state], toep, toep->flags, inp,
375 tp->t_flags &= ~TF_TOE;
376 toep->flags &= ~TPF_ATTACHED;
378 if (!(toep->flags & TPF_CPL_PENDING))
379 release_offload_resources(toep);
383 * setsockopt handler.
386 t4_ctloutput(struct toedev *tod, struct tcpcb *tp, int dir, int name)
388 struct adapter *sc = tod->tod_softc;
389 struct toepcb *toep = tp->t_toe;
394 CTR4(KTR_CXGBE, "%s: tp %p, dir %u, name %u", __func__, tp, dir, name);
398 t4_set_tcb_field(sc, toep->ctrlq, toep->tid, W_TCB_T_FLAGS,
399 V_TF_NAGLE(1), V_TF_NAGLE(tp->t_flags & TF_NODELAY ? 0 : 1),
400 0, 0, toep->ofld_rxq->iq.abs_id);
408 * The TOE driver will not receive any more CPLs for the tid associated with the
409 * toepcb; release the hold on the inpcb.
412 final_cpl_received(struct toepcb *toep)
414 struct inpcb *inp = toep->inp;
416 KASSERT(inp != NULL, ("%s: inp is NULL", __func__));
417 INP_WLOCK_ASSERT(inp);
418 KASSERT(toep->flags & TPF_CPL_PENDING,
419 ("%s: CPL not pending already?", __func__));
421 CTR6(KTR_CXGBE, "%s: tid %d, toep %p (0x%x), inp %p (0x%x)",
422 __func__, toep->tid, toep, toep->flags, inp, inp->inp_flags);
425 toep->flags &= ~TPF_CPL_PENDING;
426 mbufq_drain(&toep->ulp_pdu_reclaimq);
428 if (!(toep->flags & TPF_ATTACHED))
429 release_offload_resources(toep);
431 if (!in_pcbrele_wlocked(inp))
436 insert_tid(struct adapter *sc, int tid, void *ctx, int ntids)
438 struct tid_info *t = &sc->tids;
440 t->tid_tab[tid] = ctx;
441 atomic_add_int(&t->tids_in_use, ntids);
445 lookup_tid(struct adapter *sc, int tid)
447 struct tid_info *t = &sc->tids;
449 return (t->tid_tab[tid]);
453 update_tid(struct adapter *sc, int tid, void *ctx)
455 struct tid_info *t = &sc->tids;
457 t->tid_tab[tid] = ctx;
461 remove_tid(struct adapter *sc, int tid, int ntids)
463 struct tid_info *t = &sc->tids;
465 t->tid_tab[tid] = NULL;
466 atomic_subtract_int(&t->tids_in_use, ntids);
470 release_tid(struct adapter *sc, int tid, struct sge_wrq *ctrlq)
473 struct cpl_tid_release *req;
475 wr = alloc_wrqe(sizeof(*req), ctrlq);
477 queue_tid_release(sc, tid); /* defer */
482 INIT_TP_WR_MIT_CPL(req, CPL_TID_RELEASE, tid);
488 queue_tid_release(struct adapter *sc, int tid)
491 CXGBE_UNIMPLEMENTED("deferred tid release");
495 * What mtu_idx to use, given a 4-tuple and/or an MSS cap
498 find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc, int pmss)
500 unsigned short *mtus = &sc->params.mtus[0];
503 KASSERT(inc != NULL || pmss > 0,
504 ("%s: at least one of inc/pmss must be specified", __func__));
506 mss = inc ? tcp_mssopt(inc) : pmss;
507 if (pmss > 0 && mss > pmss)
510 if (inc->inc_flags & INC_ISIPV6)
511 n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr);
513 n = sizeof(struct ip) + sizeof(struct tcphdr);
515 for (i = 0; i < NMTUS - 1 && mtus[i + 1] <= mss + n; i++)
522 * Determine the receive window size for a socket.
525 select_rcv_wnd(struct socket *so)
529 SOCKBUF_LOCK_ASSERT(&so->so_rcv);
531 wnd = sbspace(&so->so_rcv);
532 if (wnd < MIN_RCV_WND)
535 return min(wnd, MAX_RCV_WND);
539 select_rcv_wscale(void)
542 unsigned long space = sb_max;
544 if (space > MAX_RCV_WND)
547 while (wscale < TCP_MAX_WINSHIFT && (TCP_MAXWIN << wscale) < space)
554 * socket so could be a listening socket too.
557 calc_opt0(struct socket *so, struct vi_info *vi, struct l2t_entry *e,
558 int mtu_idx, int rscale, int rx_credits, int ulp_mode)
562 KASSERT(rx_credits <= M_RCV_BUFSIZ,
563 ("%s: rcv_bufsiz too high", __func__));
565 opt0 = F_TCAM_BYPASS | V_WND_SCALE(rscale) | V_MSS_IDX(mtu_idx) |
566 V_ULP_MODE(ulp_mode) | V_RCV_BUFSIZ(rx_credits);
569 struct inpcb *inp = sotoinpcb(so);
570 struct tcpcb *tp = intotcpcb(inp);
571 int keepalive = tcp_always_keepalive ||
572 so_options_get(so) & SO_KEEPALIVE;
574 opt0 |= V_NAGLE((tp->t_flags & TF_NODELAY) == 0);
575 opt0 |= V_KEEP_ALIVE(keepalive != 0);
579 opt0 |= V_L2T_IDX(e->idx);
582 opt0 |= V_SMAC_SEL(vi->smt_idx);
583 opt0 |= V_TX_CHAN(vi->pi->tx_chan);
586 return htobe64(opt0);
590 select_ntuple(struct vi_info *vi, struct l2t_entry *e)
592 struct adapter *sc = vi->pi->adapter;
593 struct tp_params *tp = &sc->params.tp;
594 uint16_t viid = vi->viid;
598 * Initialize each of the fields which we care about which are present
599 * in the Compressed Filter Tuple.
601 if (tp->vlan_shift >= 0 && e->vlan != CPL_L2T_VLAN_NONE)
602 ntuple |= (uint64_t)(F_FT_VLAN_VLD | e->vlan) << tp->vlan_shift;
604 if (tp->port_shift >= 0)
605 ntuple |= (uint64_t)e->lport << tp->port_shift;
607 if (tp->protocol_shift >= 0)
608 ntuple |= (uint64_t)IPPROTO_TCP << tp->protocol_shift;
610 if (tp->vnic_shift >= 0) {
611 uint32_t vf = G_FW_VIID_VIN(viid);
612 uint32_t pf = G_FW_VIID_PFN(viid);
613 uint32_t vld = G_FW_VIID_VIVLD(viid);
615 ntuple |= (uint64_t)(V_FT_VNID_ID_VF(vf) | V_FT_VNID_ID_PF(pf) |
616 V_FT_VNID_ID_VLD(vld)) << tp->vnic_shift;
620 return (htobe32((uint32_t)ntuple));
622 return (htobe64(V_FILTER_TUPLE(ntuple)));
626 set_tcpddp_ulp_mode(struct toepcb *toep)
629 toep->ulp_mode = ULP_MODE_TCPDDP;
630 toep->ddp_flags = DDP_OK;
631 toep->ddp_score = DDP_LOW_SCORE;
635 negative_advice(int status)
638 return (status == CPL_ERR_RTX_NEG_ADVICE ||
639 status == CPL_ERR_PERSIST_NEG_ADVICE ||
640 status == CPL_ERR_KEEPALV_NEG_ADVICE);
644 alloc_tid_tabs(struct tid_info *t)
649 size = t->ntids * sizeof(*t->tid_tab) +
650 t->natids * sizeof(*t->atid_tab) +
651 t->nstids * sizeof(*t->stid_tab);
653 t->tid_tab = malloc(size, M_CXGBE, M_ZERO | M_NOWAIT);
654 if (t->tid_tab == NULL)
657 mtx_init(&t->atid_lock, "atid lock", NULL, MTX_DEF);
658 t->atid_tab = (union aopen_entry *)&t->tid_tab[t->ntids];
659 t->afree = t->atid_tab;
661 for (i = 1; i < t->natids; i++)
662 t->atid_tab[i - 1].next = &t->atid_tab[i];
663 t->atid_tab[t->natids - 1].next = NULL;
665 mtx_init(&t->stid_lock, "stid lock", NULL, MTX_DEF);
666 t->stid_tab = (struct listen_ctx **)&t->atid_tab[t->natids];
668 TAILQ_INIT(&t->stids);
669 t->nstids_free_head = t->nstids;
671 atomic_store_rel_int(&t->tids_in_use, 0);
677 free_tid_tabs(struct tid_info *t)
679 KASSERT(t->tids_in_use == 0,
680 ("%s: %d tids still in use.", __func__, t->tids_in_use));
681 KASSERT(t->atids_in_use == 0,
682 ("%s: %d atids still in use.", __func__, t->atids_in_use));
683 KASSERT(t->stids_in_use == 0,
684 ("%s: %d tids still in use.", __func__, t->stids_in_use));
686 free(t->tid_tab, M_CXGBE);
689 if (mtx_initialized(&t->atid_lock))
690 mtx_destroy(&t->atid_lock);
691 if (mtx_initialized(&t->stid_lock))
692 mtx_destroy(&t->stid_lock);
696 add_lip(struct adapter *sc, struct in6_addr *lip)
698 struct fw_clip_cmd c;
700 ASSERT_SYNCHRONIZED_OP(sc);
701 /* mtx_assert(&td->clip_table_lock, MA_OWNED); */
703 memset(&c, 0, sizeof(c));
704 c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST |
706 c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_ALLOC | FW_LEN16(c));
707 c.ip_hi = *(uint64_t *)&lip->s6_addr[0];
708 c.ip_lo = *(uint64_t *)&lip->s6_addr[8];
710 return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c));
714 delete_lip(struct adapter *sc, struct in6_addr *lip)
716 struct fw_clip_cmd c;
718 ASSERT_SYNCHRONIZED_OP(sc);
719 /* mtx_assert(&td->clip_table_lock, MA_OWNED); */
721 memset(&c, 0, sizeof(c));
722 c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST |
724 c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_FREE | FW_LEN16(c));
725 c.ip_hi = *(uint64_t *)&lip->s6_addr[0];
726 c.ip_lo = *(uint64_t *)&lip->s6_addr[8];
728 return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c));
731 static struct clip_entry *
732 search_lip(struct tom_data *td, struct in6_addr *lip)
734 struct clip_entry *ce;
736 mtx_assert(&td->clip_table_lock, MA_OWNED);
738 TAILQ_FOREACH(ce, &td->clip_table, link) {
739 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip))
747 hold_lip(struct tom_data *td, struct in6_addr *lip, struct clip_entry *ce)
750 mtx_lock(&td->clip_table_lock);
752 ce = search_lip(td, lip);
755 mtx_unlock(&td->clip_table_lock);
761 release_lip(struct tom_data *td, struct clip_entry *ce)
764 mtx_lock(&td->clip_table_lock);
765 KASSERT(search_lip(td, &ce->lip) == ce,
766 ("%s: CLIP entry %p p not in CLIP table.", __func__, ce));
767 KASSERT(ce->refcount > 0,
768 ("%s: CLIP entry %p has refcount 0", __func__, ce));
770 mtx_unlock(&td->clip_table_lock);
774 init_clip_table(struct adapter *sc, struct tom_data *td)
777 ASSERT_SYNCHRONIZED_OP(sc);
779 mtx_init(&td->clip_table_lock, "CLIP table lock", NULL, MTX_DEF);
780 TAILQ_INIT(&td->clip_table);
783 update_clip_table(sc, td);
787 update_clip(struct adapter *sc, void *arg __unused)
790 if (begin_synchronized_op(sc, NULL, HOLD_LOCK, "t4tomuc"))
793 if (uld_active(sc, ULD_TOM))
794 update_clip_table(sc, sc->tom_softc);
796 end_synchronized_op(sc, LOCK_HELD);
800 t4_clip_task(void *arg, int count)
803 t4_iterate(update_clip, NULL);
807 update_clip_table(struct adapter *sc, struct tom_data *td)
809 struct in6_ifaddr *ia;
810 struct in6_addr *lip, tlip;
811 struct clip_head stale;
812 struct clip_entry *ce, *ce_temp;
817 ASSERT_SYNCHRONIZED_OP(sc);
820 mtx_lock(&td->clip_table_lock);
822 gen = atomic_load_acq_int(&in6_ifaddr_gen);
823 if (gen == td->clip_gen)
827 TAILQ_CONCAT(&stale, &td->clip_table, link);
830 * last_vnet optimizes the common cases where all if_vnet = NULL (no
831 * VIMAGE) or all if_vnet = vnet0.
833 last_vnet = (uintptr_t)(-1);
835 for_each_vi(sc->port[i], j, vi) {
836 if (last_vnet == (uintptr_t)vi->ifp->if_vnet)
839 /* XXX: races with if_vmove */
840 CURVNET_SET(vi->ifp->if_vnet);
841 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
842 lip = &ia->ia_addr.sin6_addr;
844 KASSERT(!IN6_IS_ADDR_MULTICAST(lip),
845 ("%s: mcast address in in6_ifaddr list", __func__));
847 if (IN6_IS_ADDR_LOOPBACK(lip))
849 if (IN6_IS_SCOPE_EMBED(lip)) {
850 /* Remove the embedded scope */
856 * XXX: how to weed out the link local address for the
857 * loopback interface? It's fe80::1 usually (always?).
861 * If it's in the main list then we already know it's
864 TAILQ_FOREACH(ce, &td->clip_table, link) {
865 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip))
870 * If it's in the stale list we should move it to the
873 TAILQ_FOREACH(ce, &stale, link) {
874 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip)) {
875 TAILQ_REMOVE(&stale, ce, link);
876 TAILQ_INSERT_TAIL(&td->clip_table, ce,
882 /* A new IP6 address; add it to the CLIP table */
883 ce = malloc(sizeof(*ce), M_CXGBE, M_NOWAIT);
884 memcpy(&ce->lip, lip, sizeof(ce->lip));
886 rc = add_lip(sc, lip);
888 TAILQ_INSERT_TAIL(&td->clip_table, ce, link);
890 char ip[INET6_ADDRSTRLEN];
892 inet_ntop(AF_INET6, &ce->lip, &ip[0],
894 log(LOG_ERR, "%s: could not add %s (%d)\n",
902 last_vnet = (uintptr_t)vi->ifp->if_vnet;
906 * Remove stale addresses (those no longer in V_in6_ifaddrhead) that are
907 * no longer referenced by the driver.
909 TAILQ_FOREACH_SAFE(ce, &stale, link, ce_temp) {
910 if (ce->refcount == 0) {
911 rc = delete_lip(sc, &ce->lip);
913 TAILQ_REMOVE(&stale, ce, link);
916 char ip[INET6_ADDRSTRLEN];
918 inet_ntop(AF_INET6, &ce->lip, &ip[0],
920 log(LOG_ERR, "%s: could not delete %s (%d)\n",
925 /* The ones that are still referenced need to stay in the CLIP table */
926 TAILQ_CONCAT(&td->clip_table, &stale, link);
930 mtx_unlock(&td->clip_table_lock);
931 IN6_IFADDR_RUNLOCK();
935 destroy_clip_table(struct adapter *sc, struct tom_data *td)
937 struct clip_entry *ce, *ce_temp;
939 if (mtx_initialized(&td->clip_table_lock)) {
940 mtx_lock(&td->clip_table_lock);
941 TAILQ_FOREACH_SAFE(ce, &td->clip_table, link, ce_temp) {
942 KASSERT(ce->refcount == 0,
943 ("%s: CLIP entry %p still in use (%d)", __func__,
945 TAILQ_REMOVE(&td->clip_table, ce, link);
946 delete_lip(sc, &ce->lip);
949 mtx_unlock(&td->clip_table_lock);
950 mtx_destroy(&td->clip_table_lock);
955 free_tom_data(struct adapter *sc, struct tom_data *td)
958 ASSERT_SYNCHRONIZED_OP(sc);
960 KASSERT(TAILQ_EMPTY(&td->toep_list),
961 ("%s: TOE PCB list is not empty.", __func__));
962 KASSERT(td->lctx_count == 0,
963 ("%s: lctx hash table is not empty.", __func__));
965 t4_free_ppod_region(&td->pr);
966 destroy_clip_table(sc, td);
968 if (td->listen_mask != 0)
969 hashdestroy(td->listen_hash, M_CXGBE, td->listen_mask);
971 if (mtx_initialized(&td->unsent_wr_lock))
972 mtx_destroy(&td->unsent_wr_lock);
973 if (mtx_initialized(&td->lctx_hash_lock))
974 mtx_destroy(&td->lctx_hash_lock);
975 if (mtx_initialized(&td->toep_list_lock))
976 mtx_destroy(&td->toep_list_lock);
978 free_tid_tabs(&sc->tids);
983 reclaim_wr_resources(void *arg, int count)
985 struct tom_data *td = arg;
986 STAILQ_HEAD(, wrqe) twr_list = STAILQ_HEAD_INITIALIZER(twr_list);
987 struct cpl_act_open_req *cpl;
992 mtx_lock(&td->unsent_wr_lock);
993 STAILQ_SWAP(&td->unsent_wr_list, &twr_list, wrqe);
994 mtx_unlock(&td->unsent_wr_lock);
996 while ((wr = STAILQ_FIRST(&twr_list)) != NULL) {
997 STAILQ_REMOVE_HEAD(&twr_list, link);
1000 opcode = GET_OPCODE(cpl);
1003 case CPL_ACT_OPEN_REQ:
1004 case CPL_ACT_OPEN_REQ6:
1005 atid = G_TID_TID(be32toh(OPCODE_TID(cpl)));
1006 sc = td_adapter(td);
1008 CTR2(KTR_CXGBE, "%s: atid %u ", __func__, atid);
1009 act_open_failure_cleanup(sc, atid, EHOSTUNREACH);
1013 log(LOG_ERR, "%s: leaked work request %p, wr_len %d, "
1014 "opcode %x\n", __func__, wr, wr->wr_len, opcode);
1015 /* WR not freed here; go look at it with a debugger. */
1021 * Ground control to Major TOM
1022 * Commencing countdown, engines on
1025 t4_tom_activate(struct adapter *sc)
1027 struct tom_data *td;
1030 struct sge_ofld_rxq *ofld_rxq;
1033 ASSERT_SYNCHRONIZED_OP(sc);
1035 /* per-adapter softc for TOM */
1036 td = malloc(sizeof(*td), M_CXGBE, M_ZERO | M_NOWAIT);
1040 /* List of TOE PCBs and associated lock */
1041 mtx_init(&td->toep_list_lock, "PCB list lock", NULL, MTX_DEF);
1042 TAILQ_INIT(&td->toep_list);
1044 /* Listen context */
1045 mtx_init(&td->lctx_hash_lock, "lctx hash lock", NULL, MTX_DEF);
1046 td->listen_hash = hashinit_flags(LISTEN_HASH_SIZE, M_CXGBE,
1047 &td->listen_mask, HASH_NOWAIT);
1049 /* List of WRs for which L2 resolution failed */
1050 mtx_init(&td->unsent_wr_lock, "Unsent WR list lock", NULL, MTX_DEF);
1051 STAILQ_INIT(&td->unsent_wr_list);
1052 TASK_INIT(&td->reclaim_wr_resources, 0, reclaim_wr_resources, td);
1055 rc = alloc_tid_tabs(&sc->tids);
1059 rc = t4_init_ppod_region(&td->pr, &sc->vres.ddp,
1060 t4_read_reg(sc, A_ULP_RX_TDDP_PSZ), "TDDP page pods");
1063 t4_set_reg_field(sc, A_ULP_RX_TDDP_TAGMASK,
1064 V_TDDPTAGMASK(M_TDDPTAGMASK), td->pr.pr_tag_mask);
1066 /* CLIP table for IPv6 offload */
1067 init_clip_table(sc, td);
1072 tod->tod_softc = sc;
1073 tod->tod_connect = t4_connect;
1074 tod->tod_listen_start = t4_listen_start;
1075 tod->tod_listen_stop = t4_listen_stop;
1076 tod->tod_rcvd = t4_rcvd;
1077 tod->tod_output = t4_tod_output;
1078 tod->tod_send_rst = t4_send_rst;
1079 tod->tod_send_fin = t4_send_fin;
1080 tod->tod_pcb_detach = t4_pcb_detach;
1081 tod->tod_l2_update = t4_l2_update;
1082 tod->tod_syncache_added = t4_syncache_added;
1083 tod->tod_syncache_removed = t4_syncache_removed;
1084 tod->tod_syncache_respond = t4_syncache_respond;
1085 tod->tod_offload_socket = t4_offload_socket;
1086 tod->tod_ctloutput = t4_ctloutput;
1088 for_each_port(sc, i) {
1089 for_each_vi(sc->port[i], v, vi) {
1090 TOEDEV(vi->ifp) = &td->tod;
1091 for_each_ofld_rxq(vi, j, ofld_rxq) {
1092 ofld_rxq->iq.set_tcb_rpl = do_set_tcb_rpl;
1093 ofld_rxq->iq.l2t_write_rpl = do_l2t_write_rpl2;
1099 register_toedev(sc->tom_softc);
1103 free_tom_data(sc, td);
1108 t4_tom_deactivate(struct adapter *sc)
1111 struct tom_data *td = sc->tom_softc;
1113 ASSERT_SYNCHRONIZED_OP(sc);
1116 return (0); /* XXX. KASSERT? */
1118 if (sc->offload_map != 0)
1119 return (EBUSY); /* at least one port has IFCAP_TOE enabled */
1121 if (uld_active(sc, ULD_IWARP) || uld_active(sc, ULD_ISCSI))
1122 return (EBUSY); /* both iWARP and iSCSI rely on the TOE. */
1124 mtx_lock(&td->toep_list_lock);
1125 if (!TAILQ_EMPTY(&td->toep_list))
1127 mtx_unlock(&td->toep_list_lock);
1129 mtx_lock(&td->lctx_hash_lock);
1130 if (td->lctx_count > 0)
1132 mtx_unlock(&td->lctx_hash_lock);
1134 taskqueue_drain(taskqueue_thread, &td->reclaim_wr_resources);
1135 mtx_lock(&td->unsent_wr_lock);
1136 if (!STAILQ_EMPTY(&td->unsent_wr_list))
1138 mtx_unlock(&td->unsent_wr_lock);
1141 unregister_toedev(sc->tom_softc);
1142 free_tom_data(sc, td);
1143 sc->tom_softc = NULL;
1150 t4_tom_ifaddr_event(void *arg __unused, struct ifnet *ifp)
1153 atomic_add_rel_int(&in6_ifaddr_gen, 1);
1154 taskqueue_enqueue_timeout(taskqueue_thread, &clip_task, -hz / 4);
1158 t4_tom_mod_load(void)
1161 struct protosw *tcp_protosw, *tcp6_protosw;
1164 t4_init_connect_cpl_handlers();
1165 t4_init_listen_cpl_handlers();
1166 t4_init_cpl_io_handlers();
1168 rc = t4_ddp_mod_load();
1172 tcp_protosw = pffindproto(PF_INET, IPPROTO_TCP, SOCK_STREAM);
1173 if (tcp_protosw == NULL)
1174 return (ENOPROTOOPT);
1175 bcopy(tcp_protosw, &ddp_protosw, sizeof(ddp_protosw));
1176 bcopy(tcp_protosw->pr_usrreqs, &ddp_usrreqs, sizeof(ddp_usrreqs));
1177 ddp_usrreqs.pru_soreceive = t4_soreceive_ddp;
1178 ddp_protosw.pr_usrreqs = &ddp_usrreqs;
1180 tcp6_protosw = pffindproto(PF_INET6, IPPROTO_TCP, SOCK_STREAM);
1181 if (tcp6_protosw == NULL)
1182 return (ENOPROTOOPT);
1183 bcopy(tcp6_protosw, &ddp6_protosw, sizeof(ddp6_protosw));
1184 bcopy(tcp6_protosw->pr_usrreqs, &ddp6_usrreqs, sizeof(ddp6_usrreqs));
1185 ddp6_usrreqs.pru_soreceive = t4_soreceive_ddp;
1186 ddp6_protosw.pr_usrreqs = &ddp6_usrreqs;
1188 TIMEOUT_TASK_INIT(taskqueue_thread, &clip_task, 0, t4_clip_task, NULL);
1189 ifaddr_evhandler = EVENTHANDLER_REGISTER(ifaddr_event,
1190 t4_tom_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY);
1192 rc = t4_register_uld(&tom_uld_info);
1194 t4_tom_mod_unload();
1200 tom_uninit(struct adapter *sc, void *arg __unused)
1202 if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4tomun"))
1205 /* Try to free resources (works only if no port has IFCAP_TOE) */
1206 if (uld_active(sc, ULD_TOM))
1207 t4_deactivate_uld(sc, ULD_TOM);
1209 end_synchronized_op(sc, 0);
1213 t4_tom_mod_unload(void)
1215 t4_iterate(tom_uninit, NULL);
1217 if (t4_unregister_uld(&tom_uld_info) == EBUSY)
1220 if (ifaddr_evhandler) {
1221 EVENTHANDLER_DEREGISTER(ifaddr_event, ifaddr_evhandler);
1222 taskqueue_cancel_timeout(taskqueue_thread, &clip_task, NULL);
1225 t4_ddp_mod_unload();
1227 t4_uninit_connect_cpl_handlers();
1228 t4_uninit_listen_cpl_handlers();
1229 t4_uninit_cpl_io_handlers();
1233 #endif /* TCP_OFFLOAD */
1236 t4_tom_modevent(module_t mod, int cmd, void *arg)
1243 rc = t4_tom_mod_load();
1247 rc = t4_tom_mod_unload();
1254 printf("t4_tom: compiled without TCP_OFFLOAD support.\n");
1260 static moduledata_t t4_tom_moddata= {
1266 MODULE_VERSION(t4_tom, 1);
1267 MODULE_DEPEND(t4_tom, toecore, 1, 1, 1);
1268 MODULE_DEPEND(t4_tom, t4nex, 1, 1, 1);
1269 DECLARE_MODULE(t4_tom, t4_tom_moddata, SI_SUB_EXEC, SI_ORDER_ANY);