1 /*- 2 * Copyright (c) 2012 Chelsio Communications, Inc. 3 * All rights reserved. 4 * Written by: Navdeep Parhar <np@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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. 14 * 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 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include "opt_inet.h" 32 #include "opt_inet6.h" 33 34 #include <sys/param.h> 35 #include <sys/types.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/ktr.h> 39 #include <sys/lock.h> 40 #include <sys/limits.h> 41 #include <sys/module.h> 42 #include <sys/protosw.h> 43 #include <sys/domain.h> 44 #include <sys/rmlock.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/taskqueue.h> 48 #include <net/if.h> 49 #include <net/if_var.h> 50 #include <netinet/in.h> 51 #include <netinet/in_pcb.h> 52 #include <netinet/in_var.h> 53 #include <netinet/ip.h> 54 #include <netinet/ip6.h> 55 #include <netinet/tcp_var.h> 56 #include <netinet6/scope6_var.h> 57 #define TCPSTATES 58 #include <netinet/tcp_fsm.h> 59 #include <netinet/toecore.h> 60 61 #ifdef TCP_OFFLOAD 62 #include "common/common.h" 63 #include "common/t4_msg.h" 64 #include "common/t4_regs.h" 65 #include "common/t4_regs_values.h" 66 #include "common/t4_tcb.h" 67 #include "tom/t4_tom_l2t.h" 68 #include "tom/t4_tom.h" 69 70 static struct protosw ddp_protosw; 71 static struct pr_usrreqs ddp_usrreqs; 72 73 static struct protosw ddp6_protosw; 74 static struct pr_usrreqs ddp6_usrreqs; 75 76 /* Module ops */ 77 static int t4_tom_mod_load(void); 78 static int t4_tom_mod_unload(void); 79 static int t4_tom_modevent(module_t, int, void *); 80 81 /* ULD ops and helpers */ 82 static int t4_tom_activate(struct adapter *); 83 static int t4_tom_deactivate(struct adapter *); 84 85 static struct uld_info tom_uld_info = { 86 .uld_id = ULD_TOM, 87 .activate = t4_tom_activate, 88 .deactivate = t4_tom_deactivate, 89 }; 90 91 static void queue_tid_release(struct adapter *, int); 92 static void release_offload_resources(struct toepcb *); 93 static int alloc_tid_tabs(struct tid_info *); 94 static void free_tid_tabs(struct tid_info *); 95 static int add_lip(struct adapter *, struct in6_addr *); 96 static int delete_lip(struct adapter *, struct in6_addr *); 97 static struct clip_entry *search_lip(struct tom_data *, struct in6_addr *); 98 static void init_clip_table(struct adapter *, struct tom_data *); 99 static void update_clip(struct adapter *, void *); 100 static void t4_clip_task(void *, int); 101 static void update_clip_table(struct adapter *, struct tom_data *); 102 static void destroy_clip_table(struct adapter *, struct tom_data *); 103 static void free_tom_data(struct adapter *, struct tom_data *); 104 static void reclaim_wr_resources(void *, int); 105 106 static int in6_ifaddr_gen; 107 static eventhandler_tag ifaddr_evhandler; 108 static struct timeout_task clip_task; 109 110 struct toepcb * 111 alloc_toepcb(struct vi_info *vi, int txqid, int rxqid, int flags) 112 { 113 struct port_info *pi = vi->pi; 114 struct adapter *sc = pi->adapter; 115 struct toepcb *toep; 116 int tx_credits, txsd_total, len; 117 118 /* 119 * The firmware counts tx work request credits in units of 16 bytes 120 * each. Reserve room for an ABORT_REQ so the driver never has to worry 121 * about tx credits if it wants to abort a connection. 122 */ 123 tx_credits = sc->params.ofldq_wr_cred; 124 tx_credits -= howmany(sizeof(struct cpl_abort_req), 16); 125 126 /* 127 * Shortest possible tx work request is a fw_ofld_tx_data_wr + 1 byte 128 * immediate payload, and firmware counts tx work request credits in 129 * units of 16 byte. Calculate the maximum work requests possible. 130 */ 131 txsd_total = tx_credits / 132 howmany((sizeof(struct fw_ofld_tx_data_wr) + 1), 16); 133 134 if (txqid < 0) 135 txqid = (arc4random() % vi->nofldtxq) + vi->first_ofld_txq; 136 KASSERT(txqid >= vi->first_ofld_txq && 137 txqid < vi->first_ofld_txq + vi->nofldtxq, 138 ("%s: txqid %d for vi %p (first %d, n %d)", __func__, txqid, vi, 139 vi->first_ofld_txq, vi->nofldtxq)); 140 141 if (rxqid < 0) 142 rxqid = (arc4random() % vi->nofldrxq) + vi->first_ofld_rxq; 143 KASSERT(rxqid >= vi->first_ofld_rxq && 144 rxqid < vi->first_ofld_rxq + vi->nofldrxq, 145 ("%s: rxqid %d for vi %p (first %d, n %d)", __func__, rxqid, vi, 146 vi->first_ofld_rxq, vi->nofldrxq)); 147 148 len = offsetof(struct toepcb, txsd) + 149 txsd_total * sizeof(struct ofld_tx_sdesc); 150 151 toep = malloc(len, M_CXGBE, M_ZERO | flags); 152 if (toep == NULL) 153 return (NULL); 154 155 toep->td = sc->tom_softc; 156 toep->vi = vi; 157 toep->tx_total = tx_credits; 158 toep->tx_credits = tx_credits; 159 toep->ofld_txq = &sc->sge.ofld_txq[txqid]; 160 toep->ofld_rxq = &sc->sge.ofld_rxq[rxqid]; 161 toep->ctrlq = &sc->sge.ctrlq[pi->port_id]; 162 mbufq_init(&toep->ulp_pduq, INT_MAX); 163 mbufq_init(&toep->ulp_pdu_reclaimq, INT_MAX); 164 toep->txsd_total = txsd_total; 165 toep->txsd_avail = txsd_total; 166 toep->txsd_pidx = 0; 167 toep->txsd_cidx = 0; 168 169 return (toep); 170 } 171 172 void 173 free_toepcb(struct toepcb *toep) 174 { 175 176 KASSERT(!(toep->flags & TPF_ATTACHED), 177 ("%s: attached to an inpcb", __func__)); 178 KASSERT(!(toep->flags & TPF_CPL_PENDING), 179 ("%s: CPL pending", __func__)); 180 181 free(toep, M_CXGBE); 182 } 183 184 /* 185 * Set up the socket for TCP offload. 186 */ 187 void 188 offload_socket(struct socket *so, struct toepcb *toep) 189 { 190 struct tom_data *td = toep->td; 191 struct inpcb *inp = sotoinpcb(so); 192 struct tcpcb *tp = intotcpcb(inp); 193 struct sockbuf *sb; 194 195 INP_WLOCK_ASSERT(inp); 196 197 /* Update socket */ 198 sb = &so->so_snd; 199 SOCKBUF_LOCK(sb); 200 sb->sb_flags |= SB_NOCOALESCE; 201 SOCKBUF_UNLOCK(sb); 202 sb = &so->so_rcv; 203 SOCKBUF_LOCK(sb); 204 sb->sb_flags |= SB_NOCOALESCE; 205 if (toep->ulp_mode == ULP_MODE_TCPDDP) { 206 if (inp->inp_vflag & INP_IPV6) 207 so->so_proto = &ddp6_protosw; 208 else 209 so->so_proto = &ddp_protosw; 210 } 211 SOCKBUF_UNLOCK(sb); 212 213 /* Update TCP PCB */ 214 tp->tod = &td->tod; 215 tp->t_toe = toep; 216 tp->t_flags |= TF_TOE; 217 218 /* Install an extra hold on inp */ 219 toep->inp = inp; 220 toep->flags |= TPF_ATTACHED; 221 in_pcbref(inp); 222 223 /* Add the TOE PCB to the active list */ 224 mtx_lock(&td->toep_list_lock); 225 TAILQ_INSERT_HEAD(&td->toep_list, toep, link); 226 mtx_unlock(&td->toep_list_lock); 227 } 228 229 /* This is _not_ the normal way to "unoffload" a socket. */ 230 void 231 undo_offload_socket(struct socket *so) 232 { 233 struct inpcb *inp = sotoinpcb(so); 234 struct tcpcb *tp = intotcpcb(inp); 235 struct toepcb *toep = tp->t_toe; 236 struct tom_data *td = toep->td; 237 struct sockbuf *sb; 238 239 INP_WLOCK_ASSERT(inp); 240 241 sb = &so->so_snd; 242 SOCKBUF_LOCK(sb); 243 sb->sb_flags &= ~SB_NOCOALESCE; 244 SOCKBUF_UNLOCK(sb); 245 sb = &so->so_rcv; 246 SOCKBUF_LOCK(sb); 247 sb->sb_flags &= ~SB_NOCOALESCE; 248 SOCKBUF_UNLOCK(sb); 249 250 tp->tod = NULL; 251 tp->t_toe = NULL; 252 tp->t_flags &= ~TF_TOE; 253 254 toep->inp = NULL; 255 toep->flags &= ~TPF_ATTACHED; 256 if (in_pcbrele_wlocked(inp)) 257 panic("%s: inp freed.", __func__); 258 259 mtx_lock(&td->toep_list_lock); 260 TAILQ_REMOVE(&td->toep_list, toep, link); 261 mtx_unlock(&td->toep_list_lock); 262 } 263 264 static void 265 release_offload_resources(struct toepcb *toep) 266 { 267 struct tom_data *td = toep->td; 268 struct adapter *sc = td_adapter(td); 269 int tid = toep->tid; 270 271 KASSERT(!(toep->flags & TPF_CPL_PENDING), 272 ("%s: %p has CPL pending.", __func__, toep)); 273 KASSERT(!(toep->flags & TPF_ATTACHED), 274 ("%s: %p is still attached.", __func__, toep)); 275 276 CTR5(KTR_CXGBE, "%s: toep %p (tid %d, l2te %p, ce %p)", 277 __func__, toep, tid, toep->l2te, toep->ce); 278 279 /* 280 * These queues should have been emptied at approximately the same time 281 * that a normal connection's socket's so_snd would have been purged or 282 * drained. Do _not_ clean up here. 283 */ 284 MPASS(mbufq_len(&toep->ulp_pduq) == 0); 285 MPASS(mbufq_len(&toep->ulp_pdu_reclaimq) == 0); 286 287 if (toep->ulp_mode == ULP_MODE_TCPDDP) 288 release_ddp_resources(toep); 289 290 if (toep->l2te) 291 t4_l2t_release(toep->l2te); 292 293 if (tid >= 0) { 294 remove_tid(sc, tid); 295 release_tid(sc, tid, toep->ctrlq); 296 } 297 298 if (toep->ce) 299 release_lip(td, toep->ce); 300 301 mtx_lock(&td->toep_list_lock); 302 TAILQ_REMOVE(&td->toep_list, toep, link); 303 mtx_unlock(&td->toep_list_lock); 304 305 free_toepcb(toep); 306 } 307 308 /* 309 * The kernel is done with the TCP PCB and this is our opportunity to unhook the 310 * toepcb hanging off of it. If the TOE driver is also done with the toepcb (no 311 * pending CPL) then it is time to release all resources tied to the toepcb. 312 * 313 * Also gets called when an offloaded active open fails and the TOM wants the 314 * kernel to take the TCP PCB back. 315 */ 316 static void 317 t4_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp) 318 { 319 #if defined(KTR) || defined(INVARIANTS) 320 struct inpcb *inp = tp->t_inpcb; 321 #endif 322 struct toepcb *toep = tp->t_toe; 323 324 INP_WLOCK_ASSERT(inp); 325 326 KASSERT(toep != NULL, ("%s: toep is NULL", __func__)); 327 KASSERT(toep->flags & TPF_ATTACHED, 328 ("%s: not attached", __func__)); 329 330 #ifdef KTR 331 if (tp->t_state == TCPS_SYN_SENT) { 332 CTR6(KTR_CXGBE, "%s: atid %d, toep %p (0x%x), inp %p (0x%x)", 333 __func__, toep->tid, toep, toep->flags, inp, 334 inp->inp_flags); 335 } else { 336 CTR6(KTR_CXGBE, 337 "t4_pcb_detach: tid %d (%s), toep %p (0x%x), inp %p (0x%x)", 338 toep->tid, tcpstates[tp->t_state], toep, toep->flags, inp, 339 inp->inp_flags); 340 } 341 #endif 342 343 tp->t_toe = NULL; 344 tp->t_flags &= ~TF_TOE; 345 toep->flags &= ~TPF_ATTACHED; 346 347 if (!(toep->flags & TPF_CPL_PENDING)) 348 release_offload_resources(toep); 349 } 350 351 /* 352 * setsockopt handler. 353 */ 354 static void 355 t4_ctloutput(struct toedev *tod, struct tcpcb *tp, int dir, int name) 356 { 357 struct adapter *sc = tod->tod_softc; 358 struct toepcb *toep = tp->t_toe; 359 360 if (dir == SOPT_GET) 361 return; 362 363 CTR4(KTR_CXGBE, "%s: tp %p, dir %u, name %u", __func__, tp, dir, name); 364 365 switch (name) { 366 case TCP_NODELAY: 367 t4_set_tcb_field(sc, toep, 1, W_TCB_T_FLAGS, V_TF_NAGLE(1), 368 V_TF_NAGLE(tp->t_flags & TF_NODELAY ? 0 : 1)); 369 break; 370 default: 371 break; 372 } 373 } 374 375 /* 376 * The TOE driver will not receive any more CPLs for the tid associated with the 377 * toepcb; release the hold on the inpcb. 378 */ 379 void 380 final_cpl_received(struct toepcb *toep) 381 { 382 struct inpcb *inp = toep->inp; 383 384 KASSERT(inp != NULL, ("%s: inp is NULL", __func__)); 385 INP_WLOCK_ASSERT(inp); 386 KASSERT(toep->flags & TPF_CPL_PENDING, 387 ("%s: CPL not pending already?", __func__)); 388 389 CTR6(KTR_CXGBE, "%s: tid %d, toep %p (0x%x), inp %p (0x%x)", 390 __func__, toep->tid, toep, toep->flags, inp, inp->inp_flags); 391 392 toep->inp = NULL; 393 toep->flags &= ~TPF_CPL_PENDING; 394 mbufq_drain(&toep->ulp_pdu_reclaimq); 395 396 if (!(toep->flags & TPF_ATTACHED)) 397 release_offload_resources(toep); 398 399 if (!in_pcbrele_wlocked(inp)) 400 INP_WUNLOCK(inp); 401 } 402 403 void 404 insert_tid(struct adapter *sc, int tid, void *ctx) 405 { 406 struct tid_info *t = &sc->tids; 407 408 t->tid_tab[tid] = ctx; 409 atomic_add_int(&t->tids_in_use, 1); 410 } 411 412 void * 413 lookup_tid(struct adapter *sc, int tid) 414 { 415 struct tid_info *t = &sc->tids; 416 417 return (t->tid_tab[tid]); 418 } 419 420 void 421 update_tid(struct adapter *sc, int tid, void *ctx) 422 { 423 struct tid_info *t = &sc->tids; 424 425 t->tid_tab[tid] = ctx; 426 } 427 428 void 429 remove_tid(struct adapter *sc, int tid) 430 { 431 struct tid_info *t = &sc->tids; 432 433 t->tid_tab[tid] = NULL; 434 atomic_subtract_int(&t->tids_in_use, 1); 435 } 436 437 void 438 release_tid(struct adapter *sc, int tid, struct sge_wrq *ctrlq) 439 { 440 struct wrqe *wr; 441 struct cpl_tid_release *req; 442 443 wr = alloc_wrqe(sizeof(*req), ctrlq); 444 if (wr == NULL) { 445 queue_tid_release(sc, tid); /* defer */ 446 return; 447 } 448 req = wrtod(wr); 449 450 INIT_TP_WR_MIT_CPL(req, CPL_TID_RELEASE, tid); 451 452 t4_wrq_tx(sc, wr); 453 } 454 455 static void 456 queue_tid_release(struct adapter *sc, int tid) 457 { 458 459 CXGBE_UNIMPLEMENTED("deferred tid release"); 460 } 461 462 /* 463 * What mtu_idx to use, given a 4-tuple and/or an MSS cap 464 */ 465 int 466 find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc, int pmss) 467 { 468 unsigned short *mtus = &sc->params.mtus[0]; 469 int i, mss, n; 470 471 KASSERT(inc != NULL || pmss > 0, 472 ("%s: at least one of inc/pmss must be specified", __func__)); 473 474 mss = inc ? tcp_mssopt(inc) : pmss; 475 if (pmss > 0 && mss > pmss) 476 mss = pmss; 477 478 if (inc->inc_flags & INC_ISIPV6) 479 n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr); 480 else 481 n = sizeof(struct ip) + sizeof(struct tcphdr); 482 483 for (i = 0; i < NMTUS - 1 && mtus[i + 1] <= mss + n; i++) 484 continue; 485 486 return (i); 487 } 488 489 /* 490 * Determine the receive window size for a socket. 491 */ 492 u_long 493 select_rcv_wnd(struct socket *so) 494 { 495 unsigned long wnd; 496 497 SOCKBUF_LOCK_ASSERT(&so->so_rcv); 498 499 wnd = sbspace(&so->so_rcv); 500 if (wnd < MIN_RCV_WND) 501 wnd = MIN_RCV_WND; 502 503 return min(wnd, MAX_RCV_WND); 504 } 505 506 int 507 select_rcv_wscale(void) 508 { 509 int wscale = 0; 510 unsigned long space = sb_max; 511 512 if (space > MAX_RCV_WND) 513 space = MAX_RCV_WND; 514 515 while (wscale < TCP_MAX_WINSHIFT && (TCP_MAXWIN << wscale) < space) 516 wscale++; 517 518 return (wscale); 519 } 520 521 extern int always_keepalive; 522 #define VIID_SMACIDX(v) (((unsigned int)(v) & 0x7f) << 1) 523 524 /* 525 * socket so could be a listening socket too. 526 */ 527 uint64_t 528 calc_opt0(struct socket *so, struct vi_info *vi, struct l2t_entry *e, 529 int mtu_idx, int rscale, int rx_credits, int ulp_mode) 530 { 531 uint64_t opt0; 532 533 KASSERT(rx_credits <= M_RCV_BUFSIZ, 534 ("%s: rcv_bufsiz too high", __func__)); 535 536 opt0 = F_TCAM_BYPASS | V_WND_SCALE(rscale) | V_MSS_IDX(mtu_idx) | 537 V_ULP_MODE(ulp_mode) | V_RCV_BUFSIZ(rx_credits); 538 539 if (so != NULL) { 540 struct inpcb *inp = sotoinpcb(so); 541 struct tcpcb *tp = intotcpcb(inp); 542 int keepalive = always_keepalive || 543 so_options_get(so) & SO_KEEPALIVE; 544 545 opt0 |= V_NAGLE((tp->t_flags & TF_NODELAY) == 0); 546 opt0 |= V_KEEP_ALIVE(keepalive != 0); 547 } 548 549 if (e != NULL) 550 opt0 |= V_L2T_IDX(e->idx); 551 552 if (vi != NULL) { 553 opt0 |= V_SMAC_SEL(VIID_SMACIDX(vi->viid)); 554 opt0 |= V_TX_CHAN(vi->pi->tx_chan); 555 } 556 557 return htobe64(opt0); 558 } 559 560 uint64_t 561 select_ntuple(struct vi_info *vi, struct l2t_entry *e) 562 { 563 struct adapter *sc = vi->pi->adapter; 564 struct tp_params *tp = &sc->params.tp; 565 uint16_t viid = vi->viid; 566 uint64_t ntuple = 0; 567 568 /* 569 * Initialize each of the fields which we care about which are present 570 * in the Compressed Filter Tuple. 571 */ 572 if (tp->vlan_shift >= 0 && e->vlan != CPL_L2T_VLAN_NONE) 573 ntuple |= (uint64_t)(F_FT_VLAN_VLD | e->vlan) << tp->vlan_shift; 574 575 if (tp->port_shift >= 0) 576 ntuple |= (uint64_t)e->lport << tp->port_shift; 577 578 if (tp->protocol_shift >= 0) 579 ntuple |= (uint64_t)IPPROTO_TCP << tp->protocol_shift; 580 581 if (tp->vnic_shift >= 0) { 582 uint32_t vf = G_FW_VIID_VIN(viid); 583 uint32_t pf = G_FW_VIID_PFN(viid); 584 uint32_t vld = G_FW_VIID_VIVLD(viid); 585 586 ntuple |= (uint64_t)(V_FT_VNID_ID_VF(vf) | V_FT_VNID_ID_PF(pf) | 587 V_FT_VNID_ID_VLD(vld)) << tp->vnic_shift; 588 } 589 590 if (is_t4(sc)) 591 return (htobe32((uint32_t)ntuple)); 592 else 593 return (htobe64(V_FILTER_TUPLE(ntuple))); 594 } 595 596 void 597 set_tcpddp_ulp_mode(struct toepcb *toep) 598 { 599 600 toep->ulp_mode = ULP_MODE_TCPDDP; 601 toep->ddp_flags = DDP_OK; 602 toep->ddp_score = DDP_LOW_SCORE; 603 } 604 605 int 606 negative_advice(int status) 607 { 608 609 return (status == CPL_ERR_RTX_NEG_ADVICE || 610 status == CPL_ERR_PERSIST_NEG_ADVICE || 611 status == CPL_ERR_KEEPALV_NEG_ADVICE); 612 } 613 614 static int 615 alloc_tid_tabs(struct tid_info *t) 616 { 617 size_t size; 618 unsigned int i; 619 620 size = t->ntids * sizeof(*t->tid_tab) + 621 t->natids * sizeof(*t->atid_tab) + 622 t->nstids * sizeof(*t->stid_tab); 623 624 t->tid_tab = malloc(size, M_CXGBE, M_ZERO | M_NOWAIT); 625 if (t->tid_tab == NULL) 626 return (ENOMEM); 627 628 mtx_init(&t->atid_lock, "atid lock", NULL, MTX_DEF); 629 t->atid_tab = (union aopen_entry *)&t->tid_tab[t->ntids]; 630 t->afree = t->atid_tab; 631 t->atids_in_use = 0; 632 for (i = 1; i < t->natids; i++) 633 t->atid_tab[i - 1].next = &t->atid_tab[i]; 634 t->atid_tab[t->natids - 1].next = NULL; 635 636 mtx_init(&t->stid_lock, "stid lock", NULL, MTX_DEF); 637 t->stid_tab = (struct listen_ctx **)&t->atid_tab[t->natids]; 638 t->stids_in_use = 0; 639 TAILQ_INIT(&t->stids); 640 t->nstids_free_head = t->nstids; 641 642 atomic_store_rel_int(&t->tids_in_use, 0); 643 644 return (0); 645 } 646 647 static void 648 free_tid_tabs(struct tid_info *t) 649 { 650 KASSERT(t->tids_in_use == 0, 651 ("%s: %d tids still in use.", __func__, t->tids_in_use)); 652 KASSERT(t->atids_in_use == 0, 653 ("%s: %d atids still in use.", __func__, t->atids_in_use)); 654 KASSERT(t->stids_in_use == 0, 655 ("%s: %d tids still in use.", __func__, t->stids_in_use)); 656 657 free(t->tid_tab, M_CXGBE); 658 t->tid_tab = NULL; 659 660 if (mtx_initialized(&t->atid_lock)) 661 mtx_destroy(&t->atid_lock); 662 if (mtx_initialized(&t->stid_lock)) 663 mtx_destroy(&t->stid_lock); 664 } 665 666 static int 667 add_lip(struct adapter *sc, struct in6_addr *lip) 668 { 669 struct fw_clip_cmd c; 670 671 ASSERT_SYNCHRONIZED_OP(sc); 672 /* mtx_assert(&td->clip_table_lock, MA_OWNED); */ 673 674 memset(&c, 0, sizeof(c)); 675 c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST | 676 F_FW_CMD_WRITE); 677 c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_ALLOC | FW_LEN16(c)); 678 c.ip_hi = *(uint64_t *)&lip->s6_addr[0]; 679 c.ip_lo = *(uint64_t *)&lip->s6_addr[8]; 680 681 return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c)); 682 } 683 684 static int 685 delete_lip(struct adapter *sc, struct in6_addr *lip) 686 { 687 struct fw_clip_cmd c; 688 689 ASSERT_SYNCHRONIZED_OP(sc); 690 /* mtx_assert(&td->clip_table_lock, MA_OWNED); */ 691 692 memset(&c, 0, sizeof(c)); 693 c.op_to_write = htonl(V_FW_CMD_OP(FW_CLIP_CMD) | F_FW_CMD_REQUEST | 694 F_FW_CMD_READ); 695 c.alloc_to_len16 = htonl(F_FW_CLIP_CMD_FREE | FW_LEN16(c)); 696 c.ip_hi = *(uint64_t *)&lip->s6_addr[0]; 697 c.ip_lo = *(uint64_t *)&lip->s6_addr[8]; 698 699 return (-t4_wr_mbox_ns(sc, sc->mbox, &c, sizeof(c), &c)); 700 } 701 702 static struct clip_entry * 703 search_lip(struct tom_data *td, struct in6_addr *lip) 704 { 705 struct clip_entry *ce; 706 707 mtx_assert(&td->clip_table_lock, MA_OWNED); 708 709 TAILQ_FOREACH(ce, &td->clip_table, link) { 710 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip)) 711 return (ce); 712 } 713 714 return (NULL); 715 } 716 717 struct clip_entry * 718 hold_lip(struct tom_data *td, struct in6_addr *lip) 719 { 720 struct clip_entry *ce; 721 722 mtx_lock(&td->clip_table_lock); 723 ce = search_lip(td, lip); 724 if (ce != NULL) 725 ce->refcount++; 726 mtx_unlock(&td->clip_table_lock); 727 728 return (ce); 729 } 730 731 void 732 release_lip(struct tom_data *td, struct clip_entry *ce) 733 { 734 735 mtx_lock(&td->clip_table_lock); 736 KASSERT(search_lip(td, &ce->lip) == ce, 737 ("%s: CLIP entry %p p not in CLIP table.", __func__, ce)); 738 KASSERT(ce->refcount > 0, 739 ("%s: CLIP entry %p has refcount 0", __func__, ce)); 740 --ce->refcount; 741 mtx_unlock(&td->clip_table_lock); 742 } 743 744 static void 745 init_clip_table(struct adapter *sc, struct tom_data *td) 746 { 747 748 ASSERT_SYNCHRONIZED_OP(sc); 749 750 mtx_init(&td->clip_table_lock, "CLIP table lock", NULL, MTX_DEF); 751 TAILQ_INIT(&td->clip_table); 752 td->clip_gen = -1; 753 754 update_clip_table(sc, td); 755 } 756 757 static void 758 update_clip(struct adapter *sc, void *arg __unused) 759 { 760 761 if (begin_synchronized_op(sc, NULL, HOLD_LOCK, "t4tomuc")) 762 return; 763 764 if (uld_active(sc, ULD_TOM)) 765 update_clip_table(sc, sc->tom_softc); 766 767 end_synchronized_op(sc, LOCK_HELD); 768 } 769 770 static void 771 t4_clip_task(void *arg, int count) 772 { 773 774 t4_iterate(update_clip, NULL); 775 } 776 777 static void 778 update_clip_table(struct adapter *sc, struct tom_data *td) 779 { 780 struct rm_priotracker in6_ifa_tracker; 781 struct in6_ifaddr *ia; 782 struct in6_addr *lip, tlip; 783 struct clip_head stale; 784 struct clip_entry *ce, *ce_temp; 785 int rc, gen = atomic_load_acq_int(&in6_ifaddr_gen); 786 787 ASSERT_SYNCHRONIZED_OP(sc); 788 789 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 790 mtx_lock(&td->clip_table_lock); 791 792 if (gen == td->clip_gen) 793 goto done; 794 795 TAILQ_INIT(&stale); 796 TAILQ_CONCAT(&stale, &td->clip_table, link); 797 798 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 799 lip = &ia->ia_addr.sin6_addr; 800 801 KASSERT(!IN6_IS_ADDR_MULTICAST(lip), 802 ("%s: mcast address in in6_ifaddr list", __func__)); 803 804 if (IN6_IS_ADDR_LOOPBACK(lip)) 805 continue; 806 if (IN6_IS_SCOPE_EMBED(lip)) { 807 /* Remove the embedded scope */ 808 tlip = *lip; 809 lip = &tlip; 810 in6_clearscope(lip); 811 } 812 /* 813 * XXX: how to weed out the link local address for the loopback 814 * interface? It's fe80::1 usually (always?). 815 */ 816 817 /* 818 * If it's in the main list then we already know it's not stale. 819 */ 820 TAILQ_FOREACH(ce, &td->clip_table, link) { 821 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip)) 822 goto next; 823 } 824 825 /* 826 * If it's in the stale list we should move it to the main list. 827 */ 828 TAILQ_FOREACH(ce, &stale, link) { 829 if (IN6_ARE_ADDR_EQUAL(&ce->lip, lip)) { 830 TAILQ_REMOVE(&stale, ce, link); 831 TAILQ_INSERT_TAIL(&td->clip_table, ce, link); 832 goto next; 833 } 834 } 835 836 /* A new IP6 address; add it to the CLIP table */ 837 ce = malloc(sizeof(*ce), M_CXGBE, M_NOWAIT); 838 memcpy(&ce->lip, lip, sizeof(ce->lip)); 839 ce->refcount = 0; 840 rc = add_lip(sc, lip); 841 if (rc == 0) 842 TAILQ_INSERT_TAIL(&td->clip_table, ce, link); 843 else { 844 char ip[INET6_ADDRSTRLEN]; 845 846 inet_ntop(AF_INET6, &ce->lip, &ip[0], sizeof(ip)); 847 log(LOG_ERR, "%s: could not add %s (%d)\n", 848 __func__, ip, rc); 849 free(ce, M_CXGBE); 850 } 851 next: 852 continue; 853 } 854 855 /* 856 * Remove stale addresses (those no longer in V_in6_ifaddrhead) that are 857 * no longer referenced by the driver. 858 */ 859 TAILQ_FOREACH_SAFE(ce, &stale, link, ce_temp) { 860 if (ce->refcount == 0) { 861 rc = delete_lip(sc, &ce->lip); 862 if (rc == 0) { 863 TAILQ_REMOVE(&stale, ce, link); 864 free(ce, M_CXGBE); 865 } else { 866 char ip[INET6_ADDRSTRLEN]; 867 868 inet_ntop(AF_INET6, &ce->lip, &ip[0], 869 sizeof(ip)); 870 log(LOG_ERR, "%s: could not delete %s (%d)\n", 871 __func__, ip, rc); 872 } 873 } 874 } 875 /* The ones that are still referenced need to stay in the CLIP table */ 876 TAILQ_CONCAT(&td->clip_table, &stale, link); 877 878 td->clip_gen = gen; 879 done: 880 mtx_unlock(&td->clip_table_lock); 881 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 882 } 883 884 static void 885 destroy_clip_table(struct adapter *sc, struct tom_data *td) 886 { 887 struct clip_entry *ce, *ce_temp; 888 889 if (mtx_initialized(&td->clip_table_lock)) { 890 mtx_lock(&td->clip_table_lock); 891 TAILQ_FOREACH_SAFE(ce, &td->clip_table, link, ce_temp) { 892 KASSERT(ce->refcount == 0, 893 ("%s: CLIP entry %p still in use (%d)", __func__, 894 ce, ce->refcount)); 895 TAILQ_REMOVE(&td->clip_table, ce, link); 896 delete_lip(sc, &ce->lip); 897 free(ce, M_CXGBE); 898 } 899 mtx_unlock(&td->clip_table_lock); 900 mtx_destroy(&td->clip_table_lock); 901 } 902 } 903 904 static void 905 free_tom_data(struct adapter *sc, struct tom_data *td) 906 { 907 908 ASSERT_SYNCHRONIZED_OP(sc); 909 910 KASSERT(TAILQ_EMPTY(&td->toep_list), 911 ("%s: TOE PCB list is not empty.", __func__)); 912 KASSERT(td->lctx_count == 0, 913 ("%s: lctx hash table is not empty.", __func__)); 914 915 t4_uninit_l2t_cpl_handlers(sc); 916 t4_uninit_cpl_io_handlers(sc); 917 t4_uninit_ddp(sc, td); 918 destroy_clip_table(sc, td); 919 920 if (td->listen_mask != 0) 921 hashdestroy(td->listen_hash, M_CXGBE, td->listen_mask); 922 923 if (mtx_initialized(&td->unsent_wr_lock)) 924 mtx_destroy(&td->unsent_wr_lock); 925 if (mtx_initialized(&td->lctx_hash_lock)) 926 mtx_destroy(&td->lctx_hash_lock); 927 if (mtx_initialized(&td->toep_list_lock)) 928 mtx_destroy(&td->toep_list_lock); 929 930 free_tid_tabs(&sc->tids); 931 free(td, M_CXGBE); 932 } 933 934 static void 935 reclaim_wr_resources(void *arg, int count) 936 { 937 struct tom_data *td = arg; 938 STAILQ_HEAD(, wrqe) twr_list = STAILQ_HEAD_INITIALIZER(twr_list); 939 struct cpl_act_open_req *cpl; 940 u_int opcode, atid; 941 struct wrqe *wr; 942 struct adapter *sc; 943 944 mtx_lock(&td->unsent_wr_lock); 945 STAILQ_SWAP(&td->unsent_wr_list, &twr_list, wrqe); 946 mtx_unlock(&td->unsent_wr_lock); 947 948 while ((wr = STAILQ_FIRST(&twr_list)) != NULL) { 949 STAILQ_REMOVE_HEAD(&twr_list, link); 950 951 cpl = wrtod(wr); 952 opcode = GET_OPCODE(cpl); 953 954 switch (opcode) { 955 case CPL_ACT_OPEN_REQ: 956 case CPL_ACT_OPEN_REQ6: 957 atid = G_TID_TID(be32toh(OPCODE_TID(cpl))); 958 sc = td_adapter(td); 959 960 CTR2(KTR_CXGBE, "%s: atid %u ", __func__, atid); 961 act_open_failure_cleanup(sc, atid, EHOSTUNREACH); 962 free(wr, M_CXGBE); 963 break; 964 default: 965 log(LOG_ERR, "%s: leaked work request %p, wr_len %d, " 966 "opcode %x\n", __func__, wr, wr->wr_len, opcode); 967 /* WR not freed here; go look at it with a debugger. */ 968 } 969 } 970 } 971 972 /* 973 * Ground control to Major TOM 974 * Commencing countdown, engines on 975 */ 976 static int 977 t4_tom_activate(struct adapter *sc) 978 { 979 struct tom_data *td; 980 struct toedev *tod; 981 struct vi_info *vi; 982 int i, rc, v; 983 984 ASSERT_SYNCHRONIZED_OP(sc); 985 986 /* per-adapter softc for TOM */ 987 td = malloc(sizeof(*td), M_CXGBE, M_ZERO | M_NOWAIT); 988 if (td == NULL) 989 return (ENOMEM); 990 991 /* List of TOE PCBs and associated lock */ 992 mtx_init(&td->toep_list_lock, "PCB list lock", NULL, MTX_DEF); 993 TAILQ_INIT(&td->toep_list); 994 995 /* Listen context */ 996 mtx_init(&td->lctx_hash_lock, "lctx hash lock", NULL, MTX_DEF); 997 td->listen_hash = hashinit_flags(LISTEN_HASH_SIZE, M_CXGBE, 998 &td->listen_mask, HASH_NOWAIT); 999 1000 /* List of WRs for which L2 resolution failed */ 1001 mtx_init(&td->unsent_wr_lock, "Unsent WR list lock", NULL, MTX_DEF); 1002 STAILQ_INIT(&td->unsent_wr_list); 1003 TASK_INIT(&td->reclaim_wr_resources, 0, reclaim_wr_resources, td); 1004 1005 /* TID tables */ 1006 rc = alloc_tid_tabs(&sc->tids); 1007 if (rc != 0) 1008 goto done; 1009 1010 /* DDP page pods and CPL handlers */ 1011 t4_init_ddp(sc, td); 1012 1013 /* CLIP table for IPv6 offload */ 1014 init_clip_table(sc, td); 1015 1016 /* CPL handlers */ 1017 t4_init_connect_cpl_handlers(sc); 1018 t4_init_l2t_cpl_handlers(sc); 1019 t4_init_listen_cpl_handlers(sc); 1020 t4_init_cpl_io_handlers(sc); 1021 1022 /* toedev ops */ 1023 tod = &td->tod; 1024 init_toedev(tod); 1025 tod->tod_softc = sc; 1026 tod->tod_connect = t4_connect; 1027 tod->tod_listen_start = t4_listen_start; 1028 tod->tod_listen_stop = t4_listen_stop; 1029 tod->tod_rcvd = t4_rcvd; 1030 tod->tod_output = t4_tod_output; 1031 tod->tod_send_rst = t4_send_rst; 1032 tod->tod_send_fin = t4_send_fin; 1033 tod->tod_pcb_detach = t4_pcb_detach; 1034 tod->tod_l2_update = t4_l2_update; 1035 tod->tod_syncache_added = t4_syncache_added; 1036 tod->tod_syncache_removed = t4_syncache_removed; 1037 tod->tod_syncache_respond = t4_syncache_respond; 1038 tod->tod_offload_socket = t4_offload_socket; 1039 tod->tod_ctloutput = t4_ctloutput; 1040 1041 for_each_port(sc, i) { 1042 for_each_vi(sc->port[i], v, vi) { 1043 TOEDEV(vi->ifp) = &td->tod; 1044 } 1045 } 1046 1047 sc->tom_softc = td; 1048 register_toedev(sc->tom_softc); 1049 1050 done: 1051 if (rc != 0) 1052 free_tom_data(sc, td); 1053 return (rc); 1054 } 1055 1056 static int 1057 t4_tom_deactivate(struct adapter *sc) 1058 { 1059 int rc = 0; 1060 struct tom_data *td = sc->tom_softc; 1061 1062 ASSERT_SYNCHRONIZED_OP(sc); 1063 1064 if (td == NULL) 1065 return (0); /* XXX. KASSERT? */ 1066 1067 if (sc->offload_map != 0) 1068 return (EBUSY); /* at least one port has IFCAP_TOE enabled */ 1069 1070 if (uld_active(sc, ULD_IWARP) || uld_active(sc, ULD_ISCSI)) 1071 return (EBUSY); /* both iWARP and iSCSI rely on the TOE. */ 1072 1073 mtx_lock(&td->toep_list_lock); 1074 if (!TAILQ_EMPTY(&td->toep_list)) 1075 rc = EBUSY; 1076 mtx_unlock(&td->toep_list_lock); 1077 1078 mtx_lock(&td->lctx_hash_lock); 1079 if (td->lctx_count > 0) 1080 rc = EBUSY; 1081 mtx_unlock(&td->lctx_hash_lock); 1082 1083 taskqueue_drain(taskqueue_thread, &td->reclaim_wr_resources); 1084 mtx_lock(&td->unsent_wr_lock); 1085 if (!STAILQ_EMPTY(&td->unsent_wr_list)) 1086 rc = EBUSY; 1087 mtx_unlock(&td->unsent_wr_lock); 1088 1089 if (rc == 0) { 1090 unregister_toedev(sc->tom_softc); 1091 free_tom_data(sc, td); 1092 sc->tom_softc = NULL; 1093 } 1094 1095 return (rc); 1096 } 1097 1098 static void 1099 t4_tom_ifaddr_event(void *arg __unused, struct ifnet *ifp) 1100 { 1101 1102 atomic_add_rel_int(&in6_ifaddr_gen, 1); 1103 taskqueue_enqueue_timeout(taskqueue_thread, &clip_task, -hz / 4); 1104 } 1105 1106 static int 1107 t4_tom_mod_load(void) 1108 { 1109 int rc; 1110 struct protosw *tcp_protosw, *tcp6_protosw; 1111 1112 tcp_protosw = pffindproto(PF_INET, IPPROTO_TCP, SOCK_STREAM); 1113 if (tcp_protosw == NULL) 1114 return (ENOPROTOOPT); 1115 bcopy(tcp_protosw, &ddp_protosw, sizeof(ddp_protosw)); 1116 bcopy(tcp_protosw->pr_usrreqs, &ddp_usrreqs, sizeof(ddp_usrreqs)); 1117 ddp_usrreqs.pru_soreceive = t4_soreceive_ddp; 1118 ddp_protosw.pr_usrreqs = &ddp_usrreqs; 1119 1120 tcp6_protosw = pffindproto(PF_INET6, IPPROTO_TCP, SOCK_STREAM); 1121 if (tcp6_protosw == NULL) 1122 return (ENOPROTOOPT); 1123 bcopy(tcp6_protosw, &ddp6_protosw, sizeof(ddp6_protosw)); 1124 bcopy(tcp6_protosw->pr_usrreqs, &ddp6_usrreqs, sizeof(ddp6_usrreqs)); 1125 ddp6_usrreqs.pru_soreceive = t4_soreceive_ddp; 1126 ddp6_protosw.pr_usrreqs = &ddp6_usrreqs; 1127 1128 TIMEOUT_TASK_INIT(taskqueue_thread, &clip_task, 0, t4_clip_task, NULL); 1129 ifaddr_evhandler = EVENTHANDLER_REGISTER(ifaddr_event, 1130 t4_tom_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY); 1131 1132 rc = t4_register_uld(&tom_uld_info); 1133 if (rc != 0) 1134 t4_tom_mod_unload(); 1135 1136 return (rc); 1137 } 1138 1139 static void 1140 tom_uninit(struct adapter *sc, void *arg __unused) 1141 { 1142 if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4tomun")) 1143 return; 1144 1145 /* Try to free resources (works only if no port has IFCAP_TOE) */ 1146 if (uld_active(sc, ULD_TOM)) 1147 t4_deactivate_uld(sc, ULD_TOM); 1148 1149 end_synchronized_op(sc, 0); 1150 } 1151 1152 static int 1153 t4_tom_mod_unload(void) 1154 { 1155 t4_iterate(tom_uninit, NULL); 1156 1157 if (t4_unregister_uld(&tom_uld_info) == EBUSY) 1158 return (EBUSY); 1159 1160 if (ifaddr_evhandler) { 1161 EVENTHANDLER_DEREGISTER(ifaddr_event, ifaddr_evhandler); 1162 taskqueue_cancel_timeout(taskqueue_thread, &clip_task, NULL); 1163 } 1164 1165 return (0); 1166 } 1167 #endif /* TCP_OFFLOAD */ 1168 1169 static int 1170 t4_tom_modevent(module_t mod, int cmd, void *arg) 1171 { 1172 int rc = 0; 1173 1174 #ifdef TCP_OFFLOAD 1175 switch (cmd) { 1176 case MOD_LOAD: 1177 rc = t4_tom_mod_load(); 1178 break; 1179 1180 case MOD_UNLOAD: 1181 rc = t4_tom_mod_unload(); 1182 break; 1183 1184 default: 1185 rc = EINVAL; 1186 } 1187 #else 1188 printf("t4_tom: compiled without TCP_OFFLOAD support.\n"); 1189 rc = EOPNOTSUPP; 1190 #endif 1191 return (rc); 1192 } 1193 1194 static moduledata_t t4_tom_moddata= { 1195 "t4_tom", 1196 t4_tom_modevent, 1197 0 1198 }; 1199 1200 MODULE_VERSION(t4_tom, 1); 1201 MODULE_DEPEND(t4_tom, toecore, 1, 1, 1); 1202 MODULE_DEPEND(t4_tom, t4nex, 1, 1, 1); 1203 DECLARE_MODULE(t4_tom, t4_tom_moddata, SI_SUB_EXEC, SI_ORDER_ANY); 1204