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