1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 Chelsio Communications, Inc. 5 * All rights reserved. 6 * Written by: Navdeep Parhar <np@FreeBSD.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_inet.h" 34 #include "opt_inet6.h" 35 #include "opt_kern_tls.h" 36 #include "opt_ratelimit.h" 37 38 #include <sys/param.h> 39 #include <sys/types.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/ktr.h> 43 #include <sys/lock.h> 44 #include <sys/limits.h> 45 #include <sys/module.h> 46 #include <sys/protosw.h> 47 #include <sys/domain.h> 48 #include <sys/refcount.h> 49 #include <sys/rmlock.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/sysctl.h> 53 #include <sys/taskqueue.h> 54 #include <net/if.h> 55 #include <net/if_var.h> 56 #include <net/if_types.h> 57 #include <net/if_vlan_var.h> 58 #include <netinet/in.h> 59 #include <netinet/in_pcb.h> 60 #include <netinet/in_var.h> 61 #include <netinet/ip.h> 62 #include <netinet/ip6.h> 63 #include <netinet6/scope6_var.h> 64 #define TCPSTATES 65 #include <netinet/tcp_fsm.h> 66 #include <netinet/tcp_seq.h> 67 #include <netinet/tcp_timer.h> 68 #include <netinet/tcp_var.h> 69 #include <netinet/toecore.h> 70 #include <netinet/cc/cc.h> 71 72 #ifdef TCP_OFFLOAD 73 #include "common/common.h" 74 #include "common/t4_msg.h" 75 #include "common/t4_regs.h" 76 #include "common/t4_regs_values.h" 77 #include "common/t4_tcb.h" 78 #include "t4_clip.h" 79 #include "tom/t4_tom_l2t.h" 80 #include "tom/t4_tom.h" 81 #include "tom/t4_tls.h" 82 83 static struct protosw *tcp_protosw; 84 static struct protosw toe_protosw; 85 static struct pr_usrreqs toe_usrreqs; 86 87 static struct protosw *tcp6_protosw; 88 static struct protosw toe6_protosw; 89 static struct pr_usrreqs toe6_usrreqs; 90 91 /* Module ops */ 92 static int t4_tom_mod_load(void); 93 static int t4_tom_mod_unload(void); 94 static int t4_tom_modevent(module_t, int, void *); 95 96 /* ULD ops and helpers */ 97 static int t4_tom_activate(struct adapter *); 98 static int t4_tom_deactivate(struct adapter *); 99 100 static struct uld_info tom_uld_info = { 101 .uld_id = ULD_TOM, 102 .activate = t4_tom_activate, 103 .deactivate = t4_tom_deactivate, 104 }; 105 106 static void release_offload_resources(struct toepcb *); 107 static int alloc_tid_tabs(struct tid_info *); 108 static void free_tid_tabs(struct tid_info *); 109 static void free_tom_data(struct adapter *, struct tom_data *); 110 static void reclaim_wr_resources(void *, int); 111 112 struct toepcb * 113 alloc_toepcb(struct vi_info *vi, int flags) 114 { 115 struct port_info *pi = vi->pi; 116 struct adapter *sc = pi->adapter; 117 struct toepcb *toep; 118 int tx_credits, txsd_total, len; 119 120 /* 121 * The firmware counts tx work request credits in units of 16 bytes 122 * each. Reserve room for an ABORT_REQ so the driver never has to worry 123 * about tx credits if it wants to abort a connection. 124 */ 125 tx_credits = sc->params.ofldq_wr_cred; 126 tx_credits -= howmany(sizeof(struct cpl_abort_req), 16); 127 128 /* 129 * Shortest possible tx work request is a fw_ofld_tx_data_wr + 1 byte 130 * immediate payload, and firmware counts tx work request credits in 131 * units of 16 byte. Calculate the maximum work requests possible. 132 */ 133 txsd_total = tx_credits / 134 howmany(sizeof(struct fw_ofld_tx_data_wr) + 1, 16); 135 136 len = offsetof(struct toepcb, txsd) + 137 txsd_total * sizeof(struct ofld_tx_sdesc); 138 139 toep = malloc(len, M_CXGBE, M_ZERO | flags); 140 if (toep == NULL) 141 return (NULL); 142 143 refcount_init(&toep->refcount, 1); 144 toep->td = sc->tom_softc; 145 toep->vi = vi; 146 toep->tid = -1; 147 toep->tx_total = tx_credits; 148 toep->tx_credits = tx_credits; 149 mbufq_init(&toep->ulp_pduq, INT_MAX); 150 mbufq_init(&toep->ulp_pdu_reclaimq, INT_MAX); 151 toep->txsd_total = txsd_total; 152 toep->txsd_avail = txsd_total; 153 toep->txsd_pidx = 0; 154 toep->txsd_cidx = 0; 155 aiotx_init_toep(toep); 156 157 return (toep); 158 } 159 160 /* 161 * Initialize a toepcb after its params have been filled out. 162 */ 163 int 164 init_toepcb(struct vi_info *vi, struct toepcb *toep) 165 { 166 struct conn_params *cp = &toep->params; 167 struct port_info *pi = vi->pi; 168 struct adapter *sc = pi->adapter; 169 struct tx_cl_rl_params *tc; 170 171 if (cp->tc_idx >= 0 && cp->tc_idx < sc->params.nsched_cls) { 172 tc = &pi->sched_params->cl_rl[cp->tc_idx]; 173 mtx_lock(&sc->tc_lock); 174 if (tc->state != CS_HW_CONFIGURED) { 175 CH_ERR(vi, "tid %d cannot be bound to traffic class %d " 176 "because it is not configured (its state is %d)\n", 177 toep->tid, cp->tc_idx, tc->state); 178 cp->tc_idx = -1; 179 } else { 180 tc->refcount++; 181 } 182 mtx_unlock(&sc->tc_lock); 183 } 184 toep->ofld_txq = &sc->sge.ofld_txq[cp->txq_idx]; 185 toep->ofld_rxq = &sc->sge.ofld_rxq[cp->rxq_idx]; 186 toep->ctrlq = &sc->sge.ctrlq[pi->port_id]; 187 188 tls_init_toep(toep); 189 if (ulp_mode(toep) == ULP_MODE_TCPDDP) 190 ddp_init_toep(toep); 191 192 toep->flags |= TPF_INITIALIZED; 193 194 return (0); 195 } 196 197 struct toepcb * 198 hold_toepcb(struct toepcb *toep) 199 { 200 201 refcount_acquire(&toep->refcount); 202 return (toep); 203 } 204 205 void 206 free_toepcb(struct toepcb *toep) 207 { 208 209 if (refcount_release(&toep->refcount) == 0) 210 return; 211 212 KASSERT(!(toep->flags & TPF_ATTACHED), 213 ("%s: attached to an inpcb", __func__)); 214 KASSERT(!(toep->flags & TPF_CPL_PENDING), 215 ("%s: CPL pending", __func__)); 216 217 if (toep->flags & TPF_INITIALIZED) { 218 if (ulp_mode(toep) == ULP_MODE_TCPDDP) 219 ddp_uninit_toep(toep); 220 tls_uninit_toep(toep); 221 } 222 free(toep, M_CXGBE); 223 } 224 225 /* 226 * Set up the socket for TCP offload. 227 */ 228 void 229 offload_socket(struct socket *so, struct toepcb *toep) 230 { 231 struct tom_data *td = toep->td; 232 struct inpcb *inp = sotoinpcb(so); 233 struct tcpcb *tp = intotcpcb(inp); 234 struct sockbuf *sb; 235 236 INP_WLOCK_ASSERT(inp); 237 238 /* Update socket */ 239 sb = &so->so_snd; 240 SOCKBUF_LOCK(sb); 241 sb->sb_flags |= SB_NOCOALESCE; 242 SOCKBUF_UNLOCK(sb); 243 sb = &so->so_rcv; 244 SOCKBUF_LOCK(sb); 245 sb->sb_flags |= SB_NOCOALESCE; 246 if (inp->inp_vflag & INP_IPV6) 247 so->so_proto = &toe6_protosw; 248 else 249 so->so_proto = &toe_protosw; 250 SOCKBUF_UNLOCK(sb); 251 252 /* Update TCP PCB */ 253 tp->tod = &td->tod; 254 tp->t_toe = toep; 255 tp->t_flags |= TF_TOE; 256 257 /* Install an extra hold on inp */ 258 toep->inp = inp; 259 toep->flags |= TPF_ATTACHED; 260 in_pcbref(inp); 261 262 /* Add the TOE PCB to the active list */ 263 mtx_lock(&td->toep_list_lock); 264 TAILQ_INSERT_HEAD(&td->toep_list, toep, link); 265 mtx_unlock(&td->toep_list_lock); 266 } 267 268 void 269 restore_so_proto(struct socket *so, bool v6) 270 { 271 if (v6) 272 so->so_proto = tcp6_protosw; 273 else 274 so->so_proto = tcp_protosw; 275 } 276 277 /* This is _not_ the normal way to "unoffload" a socket. */ 278 void 279 undo_offload_socket(struct socket *so) 280 { 281 struct inpcb *inp = sotoinpcb(so); 282 struct tcpcb *tp = intotcpcb(inp); 283 struct toepcb *toep = tp->t_toe; 284 struct tom_data *td = toep->td; 285 struct sockbuf *sb; 286 287 INP_WLOCK_ASSERT(inp); 288 289 sb = &so->so_snd; 290 SOCKBUF_LOCK(sb); 291 sb->sb_flags &= ~SB_NOCOALESCE; 292 SOCKBUF_UNLOCK(sb); 293 sb = &so->so_rcv; 294 SOCKBUF_LOCK(sb); 295 sb->sb_flags &= ~SB_NOCOALESCE; 296 restore_so_proto(so, inp->inp_vflag & INP_IPV6); 297 SOCKBUF_UNLOCK(sb); 298 299 tp->tod = NULL; 300 tp->t_toe = NULL; 301 tp->t_flags &= ~TF_TOE; 302 303 toep->inp = NULL; 304 toep->flags &= ~TPF_ATTACHED; 305 if (in_pcbrele_wlocked(inp)) 306 panic("%s: inp freed.", __func__); 307 308 mtx_lock(&td->toep_list_lock); 309 TAILQ_REMOVE(&td->toep_list, toep, link); 310 mtx_unlock(&td->toep_list_lock); 311 } 312 313 static void 314 release_offload_resources(struct toepcb *toep) 315 { 316 struct tom_data *td = toep->td; 317 struct adapter *sc = td_adapter(td); 318 int tid = toep->tid; 319 320 KASSERT(!(toep->flags & TPF_CPL_PENDING), 321 ("%s: %p has CPL pending.", __func__, toep)); 322 KASSERT(!(toep->flags & TPF_ATTACHED), 323 ("%s: %p is still attached.", __func__, toep)); 324 325 CTR5(KTR_CXGBE, "%s: toep %p (tid %d, l2te %p, ce %p)", 326 __func__, toep, tid, toep->l2te, toep->ce); 327 328 /* 329 * These queues should have been emptied at approximately the same time 330 * that a normal connection's socket's so_snd would have been purged or 331 * drained. Do _not_ clean up here. 332 */ 333 MPASS(mbufq_len(&toep->ulp_pduq) == 0); 334 MPASS(mbufq_len(&toep->ulp_pdu_reclaimq) == 0); 335 #ifdef INVARIANTS 336 if (ulp_mode(toep) == ULP_MODE_TCPDDP) 337 ddp_assert_empty(toep); 338 #endif 339 MPASS(TAILQ_EMPTY(&toep->aiotx_jobq)); 340 341 if (toep->l2te) 342 t4_l2t_release(toep->l2te); 343 344 if (tid >= 0) { 345 remove_tid(sc, tid, toep->ce ? 2 : 1); 346 release_tid(sc, tid, toep->ctrlq); 347 } 348 349 if (toep->ce) 350 t4_release_clip_entry(sc, toep->ce); 351 352 if (toep->params.tc_idx != -1) 353 t4_release_cl_rl(sc, toep->vi->pi->port_id, toep->params.tc_idx); 354 355 mtx_lock(&td->toep_list_lock); 356 TAILQ_REMOVE(&td->toep_list, toep, link); 357 mtx_unlock(&td->toep_list_lock); 358 359 free_toepcb(toep); 360 } 361 362 /* 363 * The kernel is done with the TCP PCB and this is our opportunity to unhook the 364 * toepcb hanging off of it. If the TOE driver is also done with the toepcb (no 365 * pending CPL) then it is time to release all resources tied to the toepcb. 366 * 367 * Also gets called when an offloaded active open fails and the TOM wants the 368 * kernel to take the TCP PCB back. 369 */ 370 static void 371 t4_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp) 372 { 373 #if defined(KTR) || defined(INVARIANTS) 374 struct inpcb *inp = tp->t_inpcb; 375 #endif 376 struct toepcb *toep = tp->t_toe; 377 378 INP_WLOCK_ASSERT(inp); 379 380 KASSERT(toep != NULL, ("%s: toep is NULL", __func__)); 381 KASSERT(toep->flags & TPF_ATTACHED, 382 ("%s: not attached", __func__)); 383 384 #ifdef KTR 385 if (tp->t_state == TCPS_SYN_SENT) { 386 CTR6(KTR_CXGBE, "%s: atid %d, toep %p (0x%x), inp %p (0x%x)", 387 __func__, toep->tid, toep, toep->flags, inp, 388 inp->inp_flags); 389 } else { 390 CTR6(KTR_CXGBE, 391 "t4_pcb_detach: tid %d (%s), toep %p (0x%x), inp %p (0x%x)", 392 toep->tid, tcpstates[tp->t_state], toep, toep->flags, inp, 393 inp->inp_flags); 394 } 395 #endif 396 397 if (ulp_mode(toep) == ULP_MODE_TLS) 398 tls_detach(toep); 399 400 tp->tod = NULL; 401 tp->t_toe = NULL; 402 tp->t_flags &= ~TF_TOE; 403 toep->flags &= ~TPF_ATTACHED; 404 405 if (!(toep->flags & TPF_CPL_PENDING)) 406 release_offload_resources(toep); 407 } 408 409 /* 410 * setsockopt handler. 411 */ 412 static void 413 t4_ctloutput(struct toedev *tod, struct tcpcb *tp, int dir, int name) 414 { 415 struct adapter *sc = tod->tod_softc; 416 struct toepcb *toep = tp->t_toe; 417 418 if (dir == SOPT_GET) 419 return; 420 421 CTR4(KTR_CXGBE, "%s: tp %p, dir %u, name %u", __func__, tp, dir, name); 422 423 switch (name) { 424 case TCP_NODELAY: 425 if (tp->t_state != TCPS_ESTABLISHED) 426 break; 427 toep->params.nagle = tp->t_flags & TF_NODELAY ? 0 : 1; 428 t4_set_tcb_field(sc, toep->ctrlq, toep, W_TCB_T_FLAGS, 429 V_TF_NAGLE(1), V_TF_NAGLE(toep->params.nagle), 0, 0); 430 break; 431 default: 432 break; 433 } 434 } 435 436 static inline uint64_t 437 get_tcb_tflags(const uint64_t *tcb) 438 { 439 440 return ((be64toh(tcb[14]) << 32) | (be64toh(tcb[15]) >> 32)); 441 } 442 443 static inline uint32_t 444 get_tcb_field(const uint64_t *tcb, u_int word, uint32_t mask, u_int shift) 445 { 446 #define LAST_WORD ((TCB_SIZE / 4) - 1) 447 uint64_t t1, t2; 448 int flit_idx; 449 450 MPASS(mask != 0); 451 MPASS(word <= LAST_WORD); 452 MPASS(shift < 32); 453 454 flit_idx = (LAST_WORD - word) / 2; 455 if (word & 0x1) 456 shift += 32; 457 t1 = be64toh(tcb[flit_idx]) >> shift; 458 t2 = 0; 459 if (fls(mask) > 64 - shift) { 460 /* 461 * Will spill over into the next logical flit, which is the flit 462 * before this one. The flit_idx before this one must be valid. 463 */ 464 MPASS(flit_idx > 0); 465 t2 = be64toh(tcb[flit_idx - 1]) << (64 - shift); 466 } 467 return ((t2 | t1) & mask); 468 #undef LAST_WORD 469 } 470 #define GET_TCB_FIELD(tcb, F) \ 471 get_tcb_field(tcb, W_TCB_##F, M_TCB_##F, S_TCB_##F) 472 473 /* 474 * Issues a CPL_GET_TCB to read the entire TCB for the tid. 475 */ 476 static int 477 send_get_tcb(struct adapter *sc, u_int tid) 478 { 479 struct cpl_get_tcb *cpl; 480 struct wrq_cookie cookie; 481 482 MPASS(tid < sc->tids.ntids); 483 484 cpl = start_wrq_wr(&sc->sge.ctrlq[0], howmany(sizeof(*cpl), 16), 485 &cookie); 486 if (__predict_false(cpl == NULL)) 487 return (ENOMEM); 488 bzero(cpl, sizeof(*cpl)); 489 INIT_TP_WR(cpl, tid); 490 OPCODE_TID(cpl) = htobe32(MK_OPCODE_TID(CPL_GET_TCB, tid)); 491 cpl->reply_ctrl = htobe16(V_REPLY_CHAN(0) | 492 V_QUEUENO(sc->sge.ofld_rxq[0].iq.cntxt_id)); 493 cpl->cookie = 0xff; 494 commit_wrq_wr(&sc->sge.ctrlq[0], cpl, &cookie); 495 496 return (0); 497 } 498 499 static struct tcb_histent * 500 alloc_tcb_histent(struct adapter *sc, u_int tid, int flags) 501 { 502 struct tcb_histent *te; 503 504 MPASS(flags == M_NOWAIT || flags == M_WAITOK); 505 506 te = malloc(sizeof(*te), M_CXGBE, M_ZERO | flags); 507 if (te == NULL) 508 return (NULL); 509 mtx_init(&te->te_lock, "TCB entry", NULL, MTX_DEF); 510 callout_init_mtx(&te->te_callout, &te->te_lock, 0); 511 te->te_adapter = sc; 512 te->te_tid = tid; 513 514 return (te); 515 } 516 517 static void 518 free_tcb_histent(struct tcb_histent *te) 519 { 520 521 mtx_destroy(&te->te_lock); 522 free(te, M_CXGBE); 523 } 524 525 /* 526 * Start tracking the tid in the TCB history. 527 */ 528 int 529 add_tid_to_history(struct adapter *sc, u_int tid) 530 { 531 struct tcb_histent *te = NULL; 532 struct tom_data *td = sc->tom_softc; 533 int rc; 534 535 MPASS(tid < sc->tids.ntids); 536 537 if (td->tcb_history == NULL) 538 return (ENXIO); 539 540 rw_wlock(&td->tcb_history_lock); 541 if (td->tcb_history[tid] != NULL) { 542 rc = EEXIST; 543 goto done; 544 } 545 te = alloc_tcb_histent(sc, tid, M_NOWAIT); 546 if (te == NULL) { 547 rc = ENOMEM; 548 goto done; 549 } 550 mtx_lock(&te->te_lock); 551 rc = send_get_tcb(sc, tid); 552 if (rc == 0) { 553 te->te_flags |= TE_RPL_PENDING; 554 td->tcb_history[tid] = te; 555 } else { 556 free(te, M_CXGBE); 557 } 558 mtx_unlock(&te->te_lock); 559 done: 560 rw_wunlock(&td->tcb_history_lock); 561 return (rc); 562 } 563 564 static void 565 remove_tcb_histent(struct tcb_histent *te) 566 { 567 struct adapter *sc = te->te_adapter; 568 struct tom_data *td = sc->tom_softc; 569 570 rw_assert(&td->tcb_history_lock, RA_WLOCKED); 571 mtx_assert(&te->te_lock, MA_OWNED); 572 MPASS(td->tcb_history[te->te_tid] == te); 573 574 td->tcb_history[te->te_tid] = NULL; 575 free_tcb_histent(te); 576 rw_wunlock(&td->tcb_history_lock); 577 } 578 579 static inline struct tcb_histent * 580 lookup_tcb_histent(struct adapter *sc, u_int tid, bool addrem) 581 { 582 struct tcb_histent *te; 583 struct tom_data *td = sc->tom_softc; 584 585 MPASS(tid < sc->tids.ntids); 586 587 if (td->tcb_history == NULL) 588 return (NULL); 589 590 if (addrem) 591 rw_wlock(&td->tcb_history_lock); 592 else 593 rw_rlock(&td->tcb_history_lock); 594 te = td->tcb_history[tid]; 595 if (te != NULL) { 596 mtx_lock(&te->te_lock); 597 return (te); /* with both locks held */ 598 } 599 if (addrem) 600 rw_wunlock(&td->tcb_history_lock); 601 else 602 rw_runlock(&td->tcb_history_lock); 603 604 return (te); 605 } 606 607 static inline void 608 release_tcb_histent(struct tcb_histent *te) 609 { 610 struct adapter *sc = te->te_adapter; 611 struct tom_data *td = sc->tom_softc; 612 613 mtx_assert(&te->te_lock, MA_OWNED); 614 mtx_unlock(&te->te_lock); 615 rw_assert(&td->tcb_history_lock, RA_RLOCKED); 616 rw_runlock(&td->tcb_history_lock); 617 } 618 619 static void 620 request_tcb(void *arg) 621 { 622 struct tcb_histent *te = arg; 623 624 mtx_assert(&te->te_lock, MA_OWNED); 625 626 /* Noone else is supposed to update the histent. */ 627 MPASS(!(te->te_flags & TE_RPL_PENDING)); 628 if (send_get_tcb(te->te_adapter, te->te_tid) == 0) 629 te->te_flags |= TE_RPL_PENDING; 630 else 631 callout_schedule(&te->te_callout, hz / 100); 632 } 633 634 static void 635 update_tcb_histent(struct tcb_histent *te, const uint64_t *tcb) 636 { 637 struct tom_data *td = te->te_adapter->tom_softc; 638 uint64_t tflags = get_tcb_tflags(tcb); 639 uint8_t sample = 0; 640 641 if (GET_TCB_FIELD(tcb, SND_MAX_RAW) != GET_TCB_FIELD(tcb, SND_UNA_RAW)) { 642 if (GET_TCB_FIELD(tcb, T_RXTSHIFT) != 0) 643 sample |= TS_RTO; 644 if (GET_TCB_FIELD(tcb, T_DUPACKS) != 0) 645 sample |= TS_DUPACKS; 646 if (GET_TCB_FIELD(tcb, T_DUPACKS) >= td->dupack_threshold) 647 sample |= TS_FASTREXMT; 648 } 649 650 if (GET_TCB_FIELD(tcb, SND_MAX_RAW) != 0) { 651 uint32_t snd_wnd; 652 653 sample |= TS_SND_BACKLOGGED; /* for whatever reason. */ 654 655 snd_wnd = GET_TCB_FIELD(tcb, RCV_ADV); 656 if (tflags & V_TF_RECV_SCALE(1)) 657 snd_wnd <<= GET_TCB_FIELD(tcb, RCV_SCALE); 658 if (GET_TCB_FIELD(tcb, SND_CWND) < snd_wnd) 659 sample |= TS_CWND_LIMITED; /* maybe due to CWND */ 660 } 661 662 if (tflags & V_TF_CCTRL_ECN(1)) { 663 664 /* 665 * CE marker on incoming IP hdr, echoing ECE back in the TCP 666 * hdr. Indicates congestion somewhere on the way from the peer 667 * to this node. 668 */ 669 if (tflags & V_TF_CCTRL_ECE(1)) 670 sample |= TS_ECN_ECE; 671 672 /* 673 * ECE seen and CWR sent (or about to be sent). Might indicate 674 * congestion on the way to the peer. This node is reducing its 675 * congestion window in response. 676 */ 677 if (tflags & (V_TF_CCTRL_CWR(1) | V_TF_CCTRL_RFR(1))) 678 sample |= TS_ECN_CWR; 679 } 680 681 te->te_sample[te->te_pidx] = sample; 682 if (++te->te_pidx == nitems(te->te_sample)) 683 te->te_pidx = 0; 684 memcpy(te->te_tcb, tcb, TCB_SIZE); 685 te->te_flags |= TE_ACTIVE; 686 } 687 688 static int 689 do_get_tcb_rpl(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 690 { 691 struct adapter *sc = iq->adapter; 692 const struct cpl_get_tcb_rpl *cpl = mtod(m, const void *); 693 const uint64_t *tcb = (const uint64_t *)(const void *)(cpl + 1); 694 struct tcb_histent *te; 695 const u_int tid = GET_TID(cpl); 696 bool remove; 697 698 remove = GET_TCB_FIELD(tcb, T_STATE) == TCPS_CLOSED; 699 te = lookup_tcb_histent(sc, tid, remove); 700 if (te == NULL) { 701 /* Not in the history. Who issued the GET_TCB for this? */ 702 device_printf(sc->dev, "tcb %u: flags 0x%016jx, state %u, " 703 "srtt %u, sscale %u, rscale %u, cookie 0x%x\n", tid, 704 (uintmax_t)get_tcb_tflags(tcb), GET_TCB_FIELD(tcb, T_STATE), 705 GET_TCB_FIELD(tcb, T_SRTT), GET_TCB_FIELD(tcb, SND_SCALE), 706 GET_TCB_FIELD(tcb, RCV_SCALE), cpl->cookie); 707 goto done; 708 } 709 710 MPASS(te->te_flags & TE_RPL_PENDING); 711 te->te_flags &= ~TE_RPL_PENDING; 712 if (remove) { 713 remove_tcb_histent(te); 714 } else { 715 update_tcb_histent(te, tcb); 716 callout_reset(&te->te_callout, hz / 10, request_tcb, te); 717 release_tcb_histent(te); 718 } 719 done: 720 m_freem(m); 721 return (0); 722 } 723 724 static void 725 fill_tcp_info_from_tcb(struct adapter *sc, uint64_t *tcb, struct tcp_info *ti) 726 { 727 uint32_t v; 728 729 ti->tcpi_state = GET_TCB_FIELD(tcb, T_STATE); 730 731 v = GET_TCB_FIELD(tcb, T_SRTT); 732 ti->tcpi_rtt = tcp_ticks_to_us(sc, v); 733 734 v = GET_TCB_FIELD(tcb, T_RTTVAR); 735 ti->tcpi_rttvar = tcp_ticks_to_us(sc, v); 736 737 ti->tcpi_snd_ssthresh = GET_TCB_FIELD(tcb, SND_SSTHRESH); 738 ti->tcpi_snd_cwnd = GET_TCB_FIELD(tcb, SND_CWND); 739 ti->tcpi_rcv_nxt = GET_TCB_FIELD(tcb, RCV_NXT); 740 741 v = GET_TCB_FIELD(tcb, TX_MAX); 742 ti->tcpi_snd_nxt = v - GET_TCB_FIELD(tcb, SND_NXT_RAW); 743 744 /* Receive window being advertised by us. */ 745 ti->tcpi_rcv_wscale = GET_TCB_FIELD(tcb, SND_SCALE); /* Yes, SND. */ 746 ti->tcpi_rcv_space = GET_TCB_FIELD(tcb, RCV_WND); 747 748 /* Send window */ 749 ti->tcpi_snd_wscale = GET_TCB_FIELD(tcb, RCV_SCALE); /* Yes, RCV. */ 750 ti->tcpi_snd_wnd = GET_TCB_FIELD(tcb, RCV_ADV); 751 if (get_tcb_tflags(tcb) & V_TF_RECV_SCALE(1)) 752 ti->tcpi_snd_wnd <<= ti->tcpi_snd_wscale; 753 else 754 ti->tcpi_snd_wscale = 0; 755 756 } 757 758 static void 759 fill_tcp_info_from_history(struct adapter *sc, struct tcb_histent *te, 760 struct tcp_info *ti) 761 { 762 763 fill_tcp_info_from_tcb(sc, te->te_tcb, ti); 764 } 765 766 /* 767 * Reads the TCB for the given tid using a memory window and copies it to 'buf' 768 * in the same format as CPL_GET_TCB_RPL. 769 */ 770 static void 771 read_tcb_using_memwin(struct adapter *sc, u_int tid, uint64_t *buf) 772 { 773 int i, j, k, rc; 774 uint32_t addr; 775 u_char *tcb, tmp; 776 777 MPASS(tid < sc->tids.ntids); 778 779 addr = t4_read_reg(sc, A_TP_CMM_TCB_BASE) + tid * TCB_SIZE; 780 rc = read_via_memwin(sc, 2, addr, (uint32_t *)buf, TCB_SIZE); 781 if (rc != 0) 782 return; 783 784 tcb = (u_char *)buf; 785 for (i = 0, j = TCB_SIZE - 16; i < j; i += 16, j -= 16) { 786 for (k = 0; k < 16; k++) { 787 tmp = tcb[i + k]; 788 tcb[i + k] = tcb[j + k]; 789 tcb[j + k] = tmp; 790 } 791 } 792 } 793 794 static void 795 fill_tcp_info(struct adapter *sc, u_int tid, struct tcp_info *ti) 796 { 797 uint64_t tcb[TCB_SIZE / sizeof(uint64_t)]; 798 struct tcb_histent *te; 799 800 ti->tcpi_toe_tid = tid; 801 te = lookup_tcb_histent(sc, tid, false); 802 if (te != NULL) { 803 fill_tcp_info_from_history(sc, te, ti); 804 release_tcb_histent(te); 805 } else { 806 if (!(sc->debug_flags & DF_DISABLE_TCB_CACHE)) { 807 /* XXX: tell firmware to flush TCB cache. */ 808 } 809 read_tcb_using_memwin(sc, tid, tcb); 810 fill_tcp_info_from_tcb(sc, tcb, ti); 811 } 812 } 813 814 /* 815 * Called by the kernel to allow the TOE driver to "refine" values filled up in 816 * the tcp_info for an offloaded connection. 817 */ 818 static void 819 t4_tcp_info(struct toedev *tod, struct tcpcb *tp, struct tcp_info *ti) 820 { 821 struct adapter *sc = tod->tod_softc; 822 struct toepcb *toep = tp->t_toe; 823 824 INP_WLOCK_ASSERT(tp->t_inpcb); 825 MPASS(ti != NULL); 826 827 fill_tcp_info(sc, toep->tid, ti); 828 } 829 830 #ifdef KERN_TLS 831 static int 832 t4_alloc_tls_session(struct toedev *tod, struct tcpcb *tp, 833 struct ktls_session *tls, int direction) 834 { 835 struct toepcb *toep = tp->t_toe; 836 837 INP_WLOCK_ASSERT(tp->t_inpcb); 838 MPASS(tls != NULL); 839 840 return (tls_alloc_ktls(toep, tls, direction)); 841 } 842 #endif 843 844 /* SET_TCB_FIELD sent as a ULP command looks like this */ 845 #define LEN__SET_TCB_FIELD_ULP (sizeof(struct ulp_txpkt) + \ 846 sizeof(struct ulptx_idata) + sizeof(struct cpl_set_tcb_field_core)) 847 848 static void * 849 mk_set_tcb_field_ulp(struct ulp_txpkt *ulpmc, uint64_t word, uint64_t mask, 850 uint64_t val, uint32_t tid) 851 { 852 struct ulptx_idata *ulpsc; 853 struct cpl_set_tcb_field_core *req; 854 855 ulpmc->cmd_dest = htonl(V_ULPTX_CMD(ULP_TX_PKT) | V_ULP_TXPKT_DEST(0)); 856 ulpmc->len = htobe32(howmany(LEN__SET_TCB_FIELD_ULP, 16)); 857 858 ulpsc = (struct ulptx_idata *)(ulpmc + 1); 859 ulpsc->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_IMM)); 860 ulpsc->len = htobe32(sizeof(*req)); 861 862 req = (struct cpl_set_tcb_field_core *)(ulpsc + 1); 863 OPCODE_TID(req) = htobe32(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); 864 req->reply_ctrl = htobe16(V_NO_REPLY(1)); 865 req->word_cookie = htobe16(V_WORD(word) | V_COOKIE(0)); 866 req->mask = htobe64(mask); 867 req->val = htobe64(val); 868 869 ulpsc = (struct ulptx_idata *)(req + 1); 870 if (LEN__SET_TCB_FIELD_ULP % 16) { 871 ulpsc->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_NOOP)); 872 ulpsc->len = htobe32(0); 873 return (ulpsc + 1); 874 } 875 return (ulpsc); 876 } 877 878 static void 879 send_mss_flowc_wr(struct adapter *sc, struct toepcb *toep) 880 { 881 struct wrq_cookie cookie; 882 struct fw_flowc_wr *flowc; 883 struct ofld_tx_sdesc *txsd; 884 const int flowclen = sizeof(*flowc) + sizeof(struct fw_flowc_mnemval); 885 const int flowclen16 = howmany(flowclen, 16); 886 887 if (toep->tx_credits < flowclen16 || toep->txsd_avail == 0) { 888 CH_ERR(sc, "%s: tid %u out of tx credits (%d, %d).\n", __func__, 889 toep->tid, toep->tx_credits, toep->txsd_avail); 890 return; 891 } 892 893 flowc = start_wrq_wr(&toep->ofld_txq->wrq, flowclen16, &cookie); 894 if (__predict_false(flowc == NULL)) { 895 CH_ERR(sc, "ENOMEM in %s for tid %u.\n", __func__, toep->tid); 896 return; 897 } 898 flowc->op_to_nparams = htobe32(V_FW_WR_OP(FW_FLOWC_WR) | 899 V_FW_FLOWC_WR_NPARAMS(1)); 900 flowc->flowid_len16 = htonl(V_FW_WR_LEN16(flowclen16) | 901 V_FW_WR_FLOWID(toep->tid)); 902 flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_MSS; 903 flowc->mnemval[0].val = htobe32(toep->params.emss); 904 905 txsd = &toep->txsd[toep->txsd_pidx]; 906 txsd->tx_credits = flowclen16; 907 txsd->plen = 0; 908 toep->tx_credits -= txsd->tx_credits; 909 if (__predict_false(++toep->txsd_pidx == toep->txsd_total)) 910 toep->txsd_pidx = 0; 911 toep->txsd_avail--; 912 commit_wrq_wr(&toep->ofld_txq->wrq, flowc, &cookie); 913 } 914 915 static void 916 t4_pmtu_update(struct toedev *tod, struct tcpcb *tp, tcp_seq seq, int mtu) 917 { 918 struct work_request_hdr *wrh; 919 struct ulp_txpkt *ulpmc; 920 int idx, len; 921 struct wrq_cookie cookie; 922 struct inpcb *inp = tp->t_inpcb; 923 struct toepcb *toep = tp->t_toe; 924 struct adapter *sc = td_adapter(toep->td); 925 unsigned short *mtus = &sc->params.mtus[0]; 926 927 INP_WLOCK_ASSERT(inp); 928 MPASS(mtu > 0); /* kernel is supposed to provide something usable. */ 929 930 /* tp->snd_una and snd_max are in host byte order too. */ 931 seq = be32toh(seq); 932 933 CTR6(KTR_CXGBE, "%s: tid %d, seq 0x%08x, mtu %u, mtu_idx %u (%d)", 934 __func__, toep->tid, seq, mtu, toep->params.mtu_idx, 935 mtus[toep->params.mtu_idx]); 936 937 if (ulp_mode(toep) == ULP_MODE_NONE && /* XXX: Read TCB otherwise? */ 938 (SEQ_LT(seq, tp->snd_una) || SEQ_GEQ(seq, tp->snd_max))) { 939 CTR5(KTR_CXGBE, 940 "%s: tid %d, seq 0x%08x not in range [0x%08x, 0x%08x).", 941 __func__, toep->tid, seq, tp->snd_una, tp->snd_max); 942 return; 943 } 944 945 /* Find the best mtu_idx for the suggested MTU. */ 946 for (idx = 0; idx < NMTUS - 1 && mtus[idx + 1] <= mtu; idx++) 947 continue; 948 if (idx >= toep->params.mtu_idx) 949 return; /* Never increase the PMTU (just like the kernel). */ 950 951 /* 952 * We'll send a compound work request with 2 SET_TCB_FIELDs -- the first 953 * one updates the mtu_idx and the second one triggers a retransmit. 954 */ 955 len = sizeof(*wrh) + 2 * roundup2(LEN__SET_TCB_FIELD_ULP, 16); 956 wrh = start_wrq_wr(toep->ctrlq, howmany(len, 16), &cookie); 957 if (wrh == NULL) { 958 CH_ERR(sc, "failed to change mtu_idx of tid %d (%u -> %u).\n", 959 toep->tid, toep->params.mtu_idx, idx); 960 return; 961 } 962 INIT_ULPTX_WRH(wrh, len, 1, 0); /* atomic */ 963 ulpmc = (struct ulp_txpkt *)(wrh + 1); 964 ulpmc = mk_set_tcb_field_ulp(ulpmc, W_TCB_T_MAXSEG, 965 V_TCB_T_MAXSEG(M_TCB_T_MAXSEG), V_TCB_T_MAXSEG(idx), toep->tid); 966 ulpmc = mk_set_tcb_field_ulp(ulpmc, W_TCB_TIMESTAMP, 967 V_TCB_TIMESTAMP(0x7FFFFULL << 11), 0, toep->tid); 968 commit_wrq_wr(toep->ctrlq, wrh, &cookie); 969 970 /* Update the software toepcb and tcpcb. */ 971 toep->params.mtu_idx = idx; 972 tp->t_maxseg = mtus[toep->params.mtu_idx]; 973 if (inp->inp_inc.inc_flags & INC_ISIPV6) 974 tp->t_maxseg -= sizeof(struct ip6_hdr) + sizeof(struct tcphdr); 975 else 976 tp->t_maxseg -= sizeof(struct ip) + sizeof(struct tcphdr); 977 toep->params.emss = tp->t_maxseg; 978 if (tp->t_flags & TF_RCVD_TSTMP) 979 toep->params.emss -= TCPOLEN_TSTAMP_APPA; 980 981 /* Update the firmware flowc. */ 982 send_mss_flowc_wr(sc, toep); 983 984 /* Update the MTU in the kernel's hostcache. */ 985 if (sc->tt.update_hc_on_pmtu_change != 0) { 986 struct in_conninfo inc = {0}; 987 988 inc.inc_fibnum = inp->inp_inc.inc_fibnum; 989 if (inp->inp_inc.inc_flags & INC_ISIPV6) { 990 inc.inc_flags |= INC_ISIPV6; 991 inc.inc6_faddr = inp->inp_inc.inc6_faddr; 992 } else { 993 inc.inc_faddr = inp->inp_inc.inc_faddr; 994 } 995 tcp_hc_updatemtu(&inc, mtu); 996 } 997 998 CTR6(KTR_CXGBE, "%s: tid %d, mtu_idx %u (%u), t_maxseg %u, emss %u", 999 __func__, toep->tid, toep->params.mtu_idx, 1000 mtus[toep->params.mtu_idx], tp->t_maxseg, toep->params.emss); 1001 } 1002 1003 /* 1004 * The TOE driver will not receive any more CPLs for the tid associated with the 1005 * toepcb; release the hold on the inpcb. 1006 */ 1007 void 1008 final_cpl_received(struct toepcb *toep) 1009 { 1010 struct inpcb *inp = toep->inp; 1011 1012 KASSERT(inp != NULL, ("%s: inp is NULL", __func__)); 1013 INP_WLOCK_ASSERT(inp); 1014 KASSERT(toep->flags & TPF_CPL_PENDING, 1015 ("%s: CPL not pending already?", __func__)); 1016 1017 CTR6(KTR_CXGBE, "%s: tid %d, toep %p (0x%x), inp %p (0x%x)", 1018 __func__, toep->tid, toep, toep->flags, inp, inp->inp_flags); 1019 1020 if (ulp_mode(toep) == ULP_MODE_TCPDDP) 1021 release_ddp_resources(toep); 1022 else if (ulp_mode(toep) == ULP_MODE_TLS) 1023 tls_detach(toep); 1024 toep->inp = NULL; 1025 toep->flags &= ~TPF_CPL_PENDING; 1026 mbufq_drain(&toep->ulp_pduq); 1027 mbufq_drain(&toep->ulp_pdu_reclaimq); 1028 1029 if (!(toep->flags & TPF_ATTACHED)) 1030 release_offload_resources(toep); 1031 1032 if (!in_pcbrele_wlocked(inp)) 1033 INP_WUNLOCK(inp); 1034 } 1035 1036 void 1037 insert_tid(struct adapter *sc, int tid, void *ctx, int ntids) 1038 { 1039 struct tid_info *t = &sc->tids; 1040 1041 MPASS(tid >= t->tid_base); 1042 MPASS(tid - t->tid_base < t->ntids); 1043 1044 t->tid_tab[tid - t->tid_base] = ctx; 1045 atomic_add_int(&t->tids_in_use, ntids); 1046 } 1047 1048 void * 1049 lookup_tid(struct adapter *sc, int tid) 1050 { 1051 struct tid_info *t = &sc->tids; 1052 1053 return (t->tid_tab[tid - t->tid_base]); 1054 } 1055 1056 void 1057 update_tid(struct adapter *sc, int tid, void *ctx) 1058 { 1059 struct tid_info *t = &sc->tids; 1060 1061 t->tid_tab[tid - t->tid_base] = ctx; 1062 } 1063 1064 void 1065 remove_tid(struct adapter *sc, int tid, int ntids) 1066 { 1067 struct tid_info *t = &sc->tids; 1068 1069 t->tid_tab[tid - t->tid_base] = NULL; 1070 atomic_subtract_int(&t->tids_in_use, ntids); 1071 } 1072 1073 /* 1074 * What mtu_idx to use, given a 4-tuple. Note that both s->mss and tcp_mssopt 1075 * have the MSS that we should advertise in our SYN. Advertised MSS doesn't 1076 * account for any TCP options so the effective MSS (only payload, no headers or 1077 * options) could be different. 1078 */ 1079 static int 1080 find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc, 1081 struct offload_settings *s) 1082 { 1083 unsigned short *mtus = &sc->params.mtus[0]; 1084 int i, mss, mtu; 1085 1086 MPASS(inc != NULL); 1087 1088 mss = s->mss > 0 ? s->mss : tcp_mssopt(inc); 1089 if (inc->inc_flags & INC_ISIPV6) 1090 mtu = mss + sizeof(struct ip6_hdr) + sizeof(struct tcphdr); 1091 else 1092 mtu = mss + sizeof(struct ip) + sizeof(struct tcphdr); 1093 1094 for (i = 0; i < NMTUS - 1 && mtus[i + 1] <= mtu; i++) 1095 continue; 1096 1097 return (i); 1098 } 1099 1100 /* 1101 * Determine the receive window size for a socket. 1102 */ 1103 u_long 1104 select_rcv_wnd(struct socket *so) 1105 { 1106 unsigned long wnd; 1107 1108 SOCKBUF_LOCK_ASSERT(&so->so_rcv); 1109 1110 wnd = sbspace(&so->so_rcv); 1111 if (wnd < MIN_RCV_WND) 1112 wnd = MIN_RCV_WND; 1113 1114 return min(wnd, MAX_RCV_WND); 1115 } 1116 1117 int 1118 select_rcv_wscale(void) 1119 { 1120 int wscale = 0; 1121 unsigned long space = sb_max; 1122 1123 if (space > MAX_RCV_WND) 1124 space = MAX_RCV_WND; 1125 1126 while (wscale < TCP_MAX_WINSHIFT && (TCP_MAXWIN << wscale) < space) 1127 wscale++; 1128 1129 return (wscale); 1130 } 1131 1132 __be64 1133 calc_options0(struct vi_info *vi, struct conn_params *cp) 1134 { 1135 uint64_t opt0 = 0; 1136 1137 opt0 |= F_TCAM_BYPASS; 1138 1139 MPASS(cp->wscale >= 0 && cp->wscale <= M_WND_SCALE); 1140 opt0 |= V_WND_SCALE(cp->wscale); 1141 1142 MPASS(cp->mtu_idx >= 0 && cp->mtu_idx < NMTUS); 1143 opt0 |= V_MSS_IDX(cp->mtu_idx); 1144 1145 MPASS(cp->ulp_mode >= 0 && cp->ulp_mode <= M_ULP_MODE); 1146 opt0 |= V_ULP_MODE(cp->ulp_mode); 1147 1148 MPASS(cp->opt0_bufsize >= 0 && cp->opt0_bufsize <= M_RCV_BUFSIZ); 1149 opt0 |= V_RCV_BUFSIZ(cp->opt0_bufsize); 1150 1151 MPASS(cp->l2t_idx >= 0 && cp->l2t_idx < vi->adapter->vres.l2t.size); 1152 opt0 |= V_L2T_IDX(cp->l2t_idx); 1153 1154 opt0 |= V_SMAC_SEL(vi->smt_idx); 1155 opt0 |= V_TX_CHAN(vi->pi->tx_chan); 1156 1157 MPASS(cp->keepalive == 0 || cp->keepalive == 1); 1158 opt0 |= V_KEEP_ALIVE(cp->keepalive); 1159 1160 MPASS(cp->nagle == 0 || cp->nagle == 1); 1161 opt0 |= V_NAGLE(cp->nagle); 1162 1163 return (htobe64(opt0)); 1164 } 1165 1166 __be32 1167 calc_options2(struct vi_info *vi, struct conn_params *cp) 1168 { 1169 uint32_t opt2 = 0; 1170 struct port_info *pi = vi->pi; 1171 struct adapter *sc = pi->adapter; 1172 1173 /* 1174 * rx flow control, rx coalesce, congestion control, and tx pace are all 1175 * explicitly set by the driver. On T5+ the ISS is also set by the 1176 * driver to the value picked by the kernel. 1177 */ 1178 if (is_t4(sc)) { 1179 opt2 |= F_RX_FC_VALID | F_RX_COALESCE_VALID; 1180 opt2 |= F_CONG_CNTRL_VALID | F_PACE_VALID; 1181 } else { 1182 opt2 |= F_T5_OPT_2_VALID; /* all 4 valid */ 1183 opt2 |= F_T5_ISS; /* ISS provided in CPL */ 1184 } 1185 1186 MPASS(cp->sack == 0 || cp->sack == 1); 1187 opt2 |= V_SACK_EN(cp->sack); 1188 1189 MPASS(cp->tstamp == 0 || cp->tstamp == 1); 1190 opt2 |= V_TSTAMPS_EN(cp->tstamp); 1191 1192 if (cp->wscale > 0) 1193 opt2 |= F_WND_SCALE_EN; 1194 1195 MPASS(cp->ecn == 0 || cp->ecn == 1); 1196 opt2 |= V_CCTRL_ECN(cp->ecn); 1197 1198 /* XXX: F_RX_CHANNEL for multiple rx c-chan support goes here. */ 1199 1200 opt2 |= V_TX_QUEUE(sc->params.tp.tx_modq[pi->tx_chan]); 1201 opt2 |= V_PACE(0); 1202 opt2 |= F_RSS_QUEUE_VALID; 1203 opt2 |= V_RSS_QUEUE(sc->sge.ofld_rxq[cp->rxq_idx].iq.abs_id); 1204 1205 MPASS(cp->cong_algo >= 0 && cp->cong_algo <= M_CONG_CNTRL); 1206 opt2 |= V_CONG_CNTRL(cp->cong_algo); 1207 1208 MPASS(cp->rx_coalesce == 0 || cp->rx_coalesce == 1); 1209 if (cp->rx_coalesce == 1) 1210 opt2 |= V_RX_COALESCE(M_RX_COALESCE); 1211 1212 opt2 |= V_RX_FC_DDP(0) | V_RX_FC_DISABLE(0); 1213 #ifdef USE_DDP_RX_FLOW_CONTROL 1214 if (cp->ulp_mode == ULP_MODE_TCPDDP) 1215 opt2 |= F_RX_FC_DDP; 1216 #endif 1217 1218 return (htobe32(opt2)); 1219 } 1220 1221 uint64_t 1222 select_ntuple(struct vi_info *vi, struct l2t_entry *e) 1223 { 1224 struct adapter *sc = vi->adapter; 1225 struct tp_params *tp = &sc->params.tp; 1226 uint64_t ntuple = 0; 1227 1228 /* 1229 * Initialize each of the fields which we care about which are present 1230 * in the Compressed Filter Tuple. 1231 */ 1232 if (tp->vlan_shift >= 0 && EVL_VLANOFTAG(e->vlan) != CPL_L2T_VLAN_NONE) 1233 ntuple |= (uint64_t)(F_FT_VLAN_VLD | e->vlan) << tp->vlan_shift; 1234 1235 if (tp->port_shift >= 0) 1236 ntuple |= (uint64_t)e->lport << tp->port_shift; 1237 1238 if (tp->protocol_shift >= 0) 1239 ntuple |= (uint64_t)IPPROTO_TCP << tp->protocol_shift; 1240 1241 if (tp->vnic_shift >= 0 && tp->vnic_mode == FW_VNIC_MODE_PF_VF) { 1242 ntuple |= (uint64_t)(V_FT_VNID_ID_VF(vi->vin) | 1243 V_FT_VNID_ID_PF(sc->pf) | V_FT_VNID_ID_VLD(vi->vfvld)) << 1244 tp->vnic_shift; 1245 } 1246 1247 if (is_t4(sc)) 1248 return (htobe32((uint32_t)ntuple)); 1249 else 1250 return (htobe64(V_FILTER_TUPLE(ntuple))); 1251 } 1252 1253 static int 1254 is_tls_sock(struct socket *so, struct adapter *sc) 1255 { 1256 struct inpcb *inp = sotoinpcb(so); 1257 int i, rc; 1258 1259 /* XXX: Eventually add a SO_WANT_TLS socket option perhaps? */ 1260 rc = 0; 1261 ADAPTER_LOCK(sc); 1262 for (i = 0; i < sc->tt.num_tls_rx_ports; i++) { 1263 if (inp->inp_lport == htons(sc->tt.tls_rx_ports[i]) || 1264 inp->inp_fport == htons(sc->tt.tls_rx_ports[i])) { 1265 rc = 1; 1266 break; 1267 } 1268 } 1269 ADAPTER_UNLOCK(sc); 1270 return (rc); 1271 } 1272 1273 /* 1274 * Initialize various connection parameters. 1275 */ 1276 void 1277 init_conn_params(struct vi_info *vi , struct offload_settings *s, 1278 struct in_conninfo *inc, struct socket *so, 1279 const struct tcp_options *tcpopt, int16_t l2t_idx, struct conn_params *cp) 1280 { 1281 struct port_info *pi = vi->pi; 1282 struct adapter *sc = pi->adapter; 1283 struct tom_tunables *tt = &sc->tt; 1284 struct inpcb *inp = sotoinpcb(so); 1285 struct tcpcb *tp = intotcpcb(inp); 1286 u_long wnd; 1287 1288 MPASS(s->offload != 0); 1289 1290 /* Congestion control algorithm */ 1291 if (s->cong_algo >= 0) 1292 cp->cong_algo = s->cong_algo & M_CONG_CNTRL; 1293 else if (sc->tt.cong_algorithm >= 0) 1294 cp->cong_algo = tt->cong_algorithm & M_CONG_CNTRL; 1295 else { 1296 struct cc_algo *cc = CC_ALGO(tp); 1297 1298 if (strcasecmp(cc->name, "reno") == 0) 1299 cp->cong_algo = CONG_ALG_RENO; 1300 else if (strcasecmp(cc->name, "tahoe") == 0) 1301 cp->cong_algo = CONG_ALG_TAHOE; 1302 if (strcasecmp(cc->name, "newreno") == 0) 1303 cp->cong_algo = CONG_ALG_NEWRENO; 1304 if (strcasecmp(cc->name, "highspeed") == 0) 1305 cp->cong_algo = CONG_ALG_HIGHSPEED; 1306 else { 1307 /* 1308 * Use newreno in case the algorithm selected by the 1309 * host stack is not supported by the hardware. 1310 */ 1311 cp->cong_algo = CONG_ALG_NEWRENO; 1312 } 1313 } 1314 1315 /* Tx traffic scheduling class. */ 1316 if (s->sched_class >= 0 && s->sched_class < sc->params.nsched_cls) 1317 cp->tc_idx = s->sched_class; 1318 else 1319 cp->tc_idx = -1; 1320 1321 /* Nagle's algorithm. */ 1322 if (s->nagle >= 0) 1323 cp->nagle = s->nagle > 0 ? 1 : 0; 1324 else 1325 cp->nagle = tp->t_flags & TF_NODELAY ? 0 : 1; 1326 1327 /* TCP Keepalive. */ 1328 if (V_tcp_always_keepalive || so_options_get(so) & SO_KEEPALIVE) 1329 cp->keepalive = 1; 1330 else 1331 cp->keepalive = 0; 1332 1333 /* Optimization that's specific to T5 @ 40G. */ 1334 if (tt->tx_align >= 0) 1335 cp->tx_align = tt->tx_align > 0 ? 1 : 0; 1336 else if (chip_id(sc) == CHELSIO_T5 && 1337 (port_top_speed(pi) > 10 || sc->params.nports > 2)) 1338 cp->tx_align = 1; 1339 else 1340 cp->tx_align = 0; 1341 1342 /* ULP mode. */ 1343 if (can_tls_offload(sc) && 1344 (s->tls > 0 || (s->tls < 0 && is_tls_sock(so, sc)))) 1345 cp->ulp_mode = ULP_MODE_TLS; 1346 else if (s->ddp > 0 || 1347 (s->ddp < 0 && sc->tt.ddp && (so_options_get(so) & SO_NO_DDP) == 0)) 1348 cp->ulp_mode = ULP_MODE_TCPDDP; 1349 else 1350 cp->ulp_mode = ULP_MODE_NONE; 1351 1352 /* Rx coalescing. */ 1353 if (s->rx_coalesce >= 0) 1354 cp->rx_coalesce = s->rx_coalesce > 0 ? 1 : 0; 1355 else if (cp->ulp_mode == ULP_MODE_TLS) 1356 cp->rx_coalesce = 0; 1357 else if (tt->rx_coalesce >= 0) 1358 cp->rx_coalesce = tt->rx_coalesce > 0 ? 1 : 0; 1359 else 1360 cp->rx_coalesce = 1; /* default */ 1361 1362 /* 1363 * Index in the PMTU table. This controls the MSS that we announce in 1364 * our SYN initially, but after ESTABLISHED it controls the MSS that we 1365 * use to send data. 1366 */ 1367 cp->mtu_idx = find_best_mtu_idx(sc, inc, s); 1368 1369 /* Tx queue for this connection. */ 1370 if (s->txq >= 0 && s->txq < vi->nofldtxq) 1371 cp->txq_idx = s->txq; 1372 else 1373 cp->txq_idx = arc4random() % vi->nofldtxq; 1374 cp->txq_idx += vi->first_ofld_txq; 1375 1376 /* Rx queue for this connection. */ 1377 if (s->rxq >= 0 && s->rxq < vi->nofldrxq) 1378 cp->rxq_idx = s->rxq; 1379 else 1380 cp->rxq_idx = arc4random() % vi->nofldrxq; 1381 cp->rxq_idx += vi->first_ofld_rxq; 1382 1383 if (SOLISTENING(so)) { 1384 /* Passive open */ 1385 MPASS(tcpopt != NULL); 1386 1387 /* TCP timestamp option */ 1388 if (tcpopt->tstamp && 1389 (s->tstamp > 0 || (s->tstamp < 0 && V_tcp_do_rfc1323))) 1390 cp->tstamp = 1; 1391 else 1392 cp->tstamp = 0; 1393 1394 /* SACK */ 1395 if (tcpopt->sack && 1396 (s->sack > 0 || (s->sack < 0 && V_tcp_do_sack))) 1397 cp->sack = 1; 1398 else 1399 cp->sack = 0; 1400 1401 /* Receive window scaling. */ 1402 if (tcpopt->wsf > 0 && tcpopt->wsf < 15 && V_tcp_do_rfc1323) 1403 cp->wscale = select_rcv_wscale(); 1404 else 1405 cp->wscale = 0; 1406 1407 /* ECN */ 1408 if (tcpopt->ecn && /* XXX: review. */ 1409 (s->ecn > 0 || (s->ecn < 0 && V_tcp_do_ecn))) 1410 cp->ecn = 1; 1411 else 1412 cp->ecn = 0; 1413 1414 wnd = max(so->sol_sbrcv_hiwat, MIN_RCV_WND); 1415 cp->opt0_bufsize = min(wnd >> 10, M_RCV_BUFSIZ); 1416 1417 if (tt->sndbuf > 0) 1418 cp->sndbuf = tt->sndbuf; 1419 else if (so->sol_sbsnd_flags & SB_AUTOSIZE && 1420 V_tcp_do_autosndbuf) 1421 cp->sndbuf = 256 * 1024; 1422 else 1423 cp->sndbuf = so->sol_sbsnd_hiwat; 1424 } else { 1425 /* Active open */ 1426 1427 /* TCP timestamp option */ 1428 if (s->tstamp > 0 || 1429 (s->tstamp < 0 && (tp->t_flags & TF_REQ_TSTMP))) 1430 cp->tstamp = 1; 1431 else 1432 cp->tstamp = 0; 1433 1434 /* SACK */ 1435 if (s->sack > 0 || 1436 (s->sack < 0 && (tp->t_flags & TF_SACK_PERMIT))) 1437 cp->sack = 1; 1438 else 1439 cp->sack = 0; 1440 1441 /* Receive window scaling */ 1442 if (tp->t_flags & TF_REQ_SCALE) 1443 cp->wscale = select_rcv_wscale(); 1444 else 1445 cp->wscale = 0; 1446 1447 /* ECN */ 1448 if (s->ecn > 0 || (s->ecn < 0 && V_tcp_do_ecn == 1)) 1449 cp->ecn = 1; 1450 else 1451 cp->ecn = 0; 1452 1453 SOCKBUF_LOCK(&so->so_rcv); 1454 wnd = max(select_rcv_wnd(so), MIN_RCV_WND); 1455 SOCKBUF_UNLOCK(&so->so_rcv); 1456 cp->opt0_bufsize = min(wnd >> 10, M_RCV_BUFSIZ); 1457 1458 if (tt->sndbuf > 0) 1459 cp->sndbuf = tt->sndbuf; 1460 else { 1461 SOCKBUF_LOCK(&so->so_snd); 1462 if (so->so_snd.sb_flags & SB_AUTOSIZE && 1463 V_tcp_do_autosndbuf) 1464 cp->sndbuf = 256 * 1024; 1465 else 1466 cp->sndbuf = so->so_snd.sb_hiwat; 1467 SOCKBUF_UNLOCK(&so->so_snd); 1468 } 1469 } 1470 1471 cp->l2t_idx = l2t_idx; 1472 1473 /* This will be initialized on ESTABLISHED. */ 1474 cp->emss = 0; 1475 } 1476 1477 int 1478 negative_advice(int status) 1479 { 1480 1481 return (status == CPL_ERR_RTX_NEG_ADVICE || 1482 status == CPL_ERR_PERSIST_NEG_ADVICE || 1483 status == CPL_ERR_KEEPALV_NEG_ADVICE); 1484 } 1485 1486 static int 1487 alloc_tid_tab(struct tid_info *t, int flags) 1488 { 1489 1490 MPASS(t->ntids > 0); 1491 MPASS(t->tid_tab == NULL); 1492 1493 t->tid_tab = malloc(t->ntids * sizeof(*t->tid_tab), M_CXGBE, 1494 M_ZERO | flags); 1495 if (t->tid_tab == NULL) 1496 return (ENOMEM); 1497 atomic_store_rel_int(&t->tids_in_use, 0); 1498 1499 return (0); 1500 } 1501 1502 static void 1503 free_tid_tab(struct tid_info *t) 1504 { 1505 1506 KASSERT(t->tids_in_use == 0, 1507 ("%s: %d tids still in use.", __func__, t->tids_in_use)); 1508 1509 free(t->tid_tab, M_CXGBE); 1510 t->tid_tab = NULL; 1511 } 1512 1513 static int 1514 alloc_stid_tab(struct tid_info *t, int flags) 1515 { 1516 1517 MPASS(t->nstids > 0); 1518 MPASS(t->stid_tab == NULL); 1519 1520 t->stid_tab = malloc(t->nstids * sizeof(*t->stid_tab), M_CXGBE, 1521 M_ZERO | flags); 1522 if (t->stid_tab == NULL) 1523 return (ENOMEM); 1524 mtx_init(&t->stid_lock, "stid lock", NULL, MTX_DEF); 1525 t->stids_in_use = 0; 1526 TAILQ_INIT(&t->stids); 1527 t->nstids_free_head = t->nstids; 1528 1529 return (0); 1530 } 1531 1532 static void 1533 free_stid_tab(struct tid_info *t) 1534 { 1535 1536 KASSERT(t->stids_in_use == 0, 1537 ("%s: %d tids still in use.", __func__, t->stids_in_use)); 1538 1539 if (mtx_initialized(&t->stid_lock)) 1540 mtx_destroy(&t->stid_lock); 1541 free(t->stid_tab, M_CXGBE); 1542 t->stid_tab = NULL; 1543 } 1544 1545 static void 1546 free_tid_tabs(struct tid_info *t) 1547 { 1548 1549 free_tid_tab(t); 1550 free_stid_tab(t); 1551 } 1552 1553 static int 1554 alloc_tid_tabs(struct tid_info *t) 1555 { 1556 int rc; 1557 1558 rc = alloc_tid_tab(t, M_NOWAIT); 1559 if (rc != 0) 1560 goto failed; 1561 1562 rc = alloc_stid_tab(t, M_NOWAIT); 1563 if (rc != 0) 1564 goto failed; 1565 1566 return (0); 1567 failed: 1568 free_tid_tabs(t); 1569 return (rc); 1570 } 1571 1572 static inline void 1573 alloc_tcb_history(struct adapter *sc, struct tom_data *td) 1574 { 1575 1576 if (sc->tids.ntids == 0 || sc->tids.ntids > 1024) 1577 return; 1578 rw_init(&td->tcb_history_lock, "TCB history"); 1579 td->tcb_history = malloc(sc->tids.ntids * sizeof(*td->tcb_history), 1580 M_CXGBE, M_ZERO | M_NOWAIT); 1581 td->dupack_threshold = G_DUPACKTHRESH(t4_read_reg(sc, A_TP_PARA_REG0)); 1582 } 1583 1584 static inline void 1585 free_tcb_history(struct adapter *sc, struct tom_data *td) 1586 { 1587 #ifdef INVARIANTS 1588 int i; 1589 1590 if (td->tcb_history != NULL) { 1591 for (i = 0; i < sc->tids.ntids; i++) { 1592 MPASS(td->tcb_history[i] == NULL); 1593 } 1594 } 1595 #endif 1596 free(td->tcb_history, M_CXGBE); 1597 if (rw_initialized(&td->tcb_history_lock)) 1598 rw_destroy(&td->tcb_history_lock); 1599 } 1600 1601 static void 1602 free_tom_data(struct adapter *sc, struct tom_data *td) 1603 { 1604 1605 ASSERT_SYNCHRONIZED_OP(sc); 1606 1607 KASSERT(TAILQ_EMPTY(&td->toep_list), 1608 ("%s: TOE PCB list is not empty.", __func__)); 1609 KASSERT(td->lctx_count == 0, 1610 ("%s: lctx hash table is not empty.", __func__)); 1611 1612 t4_free_ppod_region(&td->pr); 1613 1614 if (td->listen_mask != 0) 1615 hashdestroy(td->listen_hash, M_CXGBE, td->listen_mask); 1616 1617 if (mtx_initialized(&td->unsent_wr_lock)) 1618 mtx_destroy(&td->unsent_wr_lock); 1619 if (mtx_initialized(&td->lctx_hash_lock)) 1620 mtx_destroy(&td->lctx_hash_lock); 1621 if (mtx_initialized(&td->toep_list_lock)) 1622 mtx_destroy(&td->toep_list_lock); 1623 1624 free_tcb_history(sc, td); 1625 free_tid_tabs(&sc->tids); 1626 free(td, M_CXGBE); 1627 } 1628 1629 static char * 1630 prepare_pkt(int open_type, uint16_t vtag, struct inpcb *inp, int *pktlen, 1631 int *buflen) 1632 { 1633 char *pkt; 1634 struct tcphdr *th; 1635 int ipv6, len; 1636 const int maxlen = 1637 max(sizeof(struct ether_header), sizeof(struct ether_vlan_header)) + 1638 max(sizeof(struct ip), sizeof(struct ip6_hdr)) + 1639 sizeof(struct tcphdr); 1640 1641 MPASS(open_type == OPEN_TYPE_ACTIVE || open_type == OPEN_TYPE_LISTEN); 1642 1643 pkt = malloc(maxlen, M_CXGBE, M_ZERO | M_NOWAIT); 1644 if (pkt == NULL) 1645 return (NULL); 1646 1647 ipv6 = inp->inp_vflag & INP_IPV6; 1648 len = 0; 1649 1650 if (EVL_VLANOFTAG(vtag) == 0xfff) { 1651 struct ether_header *eh = (void *)pkt; 1652 1653 if (ipv6) 1654 eh->ether_type = htons(ETHERTYPE_IPV6); 1655 else 1656 eh->ether_type = htons(ETHERTYPE_IP); 1657 1658 len += sizeof(*eh); 1659 } else { 1660 struct ether_vlan_header *evh = (void *)pkt; 1661 1662 evh->evl_encap_proto = htons(ETHERTYPE_VLAN); 1663 evh->evl_tag = htons(vtag); 1664 if (ipv6) 1665 evh->evl_proto = htons(ETHERTYPE_IPV6); 1666 else 1667 evh->evl_proto = htons(ETHERTYPE_IP); 1668 1669 len += sizeof(*evh); 1670 } 1671 1672 if (ipv6) { 1673 struct ip6_hdr *ip6 = (void *)&pkt[len]; 1674 1675 ip6->ip6_vfc = IPV6_VERSION; 1676 ip6->ip6_plen = htons(sizeof(struct tcphdr)); 1677 ip6->ip6_nxt = IPPROTO_TCP; 1678 if (open_type == OPEN_TYPE_ACTIVE) { 1679 ip6->ip6_src = inp->in6p_laddr; 1680 ip6->ip6_dst = inp->in6p_faddr; 1681 } else if (open_type == OPEN_TYPE_LISTEN) { 1682 ip6->ip6_src = inp->in6p_laddr; 1683 ip6->ip6_dst = ip6->ip6_src; 1684 } 1685 1686 len += sizeof(*ip6); 1687 } else { 1688 struct ip *ip = (void *)&pkt[len]; 1689 1690 ip->ip_v = IPVERSION; 1691 ip->ip_hl = sizeof(*ip) >> 2; 1692 ip->ip_tos = inp->inp_ip_tos; 1693 ip->ip_len = htons(sizeof(struct ip) + sizeof(struct tcphdr)); 1694 ip->ip_ttl = inp->inp_ip_ttl; 1695 ip->ip_p = IPPROTO_TCP; 1696 if (open_type == OPEN_TYPE_ACTIVE) { 1697 ip->ip_src = inp->inp_laddr; 1698 ip->ip_dst = inp->inp_faddr; 1699 } else if (open_type == OPEN_TYPE_LISTEN) { 1700 ip->ip_src = inp->inp_laddr; 1701 ip->ip_dst = ip->ip_src; 1702 } 1703 1704 len += sizeof(*ip); 1705 } 1706 1707 th = (void *)&pkt[len]; 1708 if (open_type == OPEN_TYPE_ACTIVE) { 1709 th->th_sport = inp->inp_lport; /* network byte order already */ 1710 th->th_dport = inp->inp_fport; /* ditto */ 1711 } else if (open_type == OPEN_TYPE_LISTEN) { 1712 th->th_sport = inp->inp_lport; /* network byte order already */ 1713 th->th_dport = th->th_sport; 1714 } 1715 len += sizeof(th); 1716 1717 *pktlen = *buflen = len; 1718 return (pkt); 1719 } 1720 1721 const struct offload_settings * 1722 lookup_offload_policy(struct adapter *sc, int open_type, struct mbuf *m, 1723 uint16_t vtag, struct inpcb *inp) 1724 { 1725 const struct t4_offload_policy *op; 1726 char *pkt; 1727 struct offload_rule *r; 1728 int i, matched, pktlen, buflen; 1729 static const struct offload_settings allow_offloading_settings = { 1730 .offload = 1, 1731 .rx_coalesce = -1, 1732 .cong_algo = -1, 1733 .sched_class = -1, 1734 .tstamp = -1, 1735 .sack = -1, 1736 .nagle = -1, 1737 .ecn = -1, 1738 .ddp = -1, 1739 .tls = -1, 1740 .txq = -1, 1741 .rxq = -1, 1742 .mss = -1, 1743 }; 1744 static const struct offload_settings disallow_offloading_settings = { 1745 .offload = 0, 1746 /* rest is irrelevant when offload is off. */ 1747 }; 1748 1749 rw_assert(&sc->policy_lock, RA_LOCKED); 1750 1751 /* 1752 * If there's no Connection Offloading Policy attached to the device 1753 * then we need to return a default static policy. If 1754 * "cop_managed_offloading" is true, then we need to disallow 1755 * offloading until a COP is attached to the device. Otherwise we 1756 * allow offloading ... 1757 */ 1758 op = sc->policy; 1759 if (op == NULL) { 1760 if (sc->tt.cop_managed_offloading) 1761 return (&disallow_offloading_settings); 1762 else 1763 return (&allow_offloading_settings); 1764 } 1765 1766 switch (open_type) { 1767 case OPEN_TYPE_ACTIVE: 1768 case OPEN_TYPE_LISTEN: 1769 pkt = prepare_pkt(open_type, vtag, inp, &pktlen, &buflen); 1770 break; 1771 case OPEN_TYPE_PASSIVE: 1772 MPASS(m != NULL); 1773 pkt = mtod(m, char *); 1774 MPASS(*pkt == CPL_PASS_ACCEPT_REQ); 1775 pkt += sizeof(struct cpl_pass_accept_req); 1776 pktlen = m->m_pkthdr.len - sizeof(struct cpl_pass_accept_req); 1777 buflen = m->m_len - sizeof(struct cpl_pass_accept_req); 1778 break; 1779 default: 1780 MPASS(0); 1781 return (&disallow_offloading_settings); 1782 } 1783 1784 if (pkt == NULL || pktlen == 0 || buflen == 0) 1785 return (&disallow_offloading_settings); 1786 1787 matched = 0; 1788 r = &op->rule[0]; 1789 for (i = 0; i < op->nrules; i++, r++) { 1790 if (r->open_type != open_type && 1791 r->open_type != OPEN_TYPE_DONTCARE) { 1792 continue; 1793 } 1794 matched = bpf_filter(r->bpf_prog.bf_insns, pkt, pktlen, buflen); 1795 if (matched) 1796 break; 1797 } 1798 1799 if (open_type == OPEN_TYPE_ACTIVE || open_type == OPEN_TYPE_LISTEN) 1800 free(pkt, M_CXGBE); 1801 1802 return (matched ? &r->settings : &disallow_offloading_settings); 1803 } 1804 1805 static void 1806 reclaim_wr_resources(void *arg, int count) 1807 { 1808 struct tom_data *td = arg; 1809 STAILQ_HEAD(, wrqe) twr_list = STAILQ_HEAD_INITIALIZER(twr_list); 1810 struct cpl_act_open_req *cpl; 1811 u_int opcode, atid, tid; 1812 struct wrqe *wr; 1813 struct adapter *sc = td_adapter(td); 1814 1815 mtx_lock(&td->unsent_wr_lock); 1816 STAILQ_SWAP(&td->unsent_wr_list, &twr_list, wrqe); 1817 mtx_unlock(&td->unsent_wr_lock); 1818 1819 while ((wr = STAILQ_FIRST(&twr_list)) != NULL) { 1820 STAILQ_REMOVE_HEAD(&twr_list, link); 1821 1822 cpl = wrtod(wr); 1823 opcode = GET_OPCODE(cpl); 1824 1825 switch (opcode) { 1826 case CPL_ACT_OPEN_REQ: 1827 case CPL_ACT_OPEN_REQ6: 1828 atid = G_TID_TID(be32toh(OPCODE_TID(cpl))); 1829 CTR2(KTR_CXGBE, "%s: atid %u ", __func__, atid); 1830 act_open_failure_cleanup(sc, atid, EHOSTUNREACH); 1831 free(wr, M_CXGBE); 1832 break; 1833 case CPL_PASS_ACCEPT_RPL: 1834 tid = GET_TID(cpl); 1835 CTR2(KTR_CXGBE, "%s: tid %u ", __func__, tid); 1836 synack_failure_cleanup(sc, tid); 1837 free(wr, M_CXGBE); 1838 break; 1839 default: 1840 log(LOG_ERR, "%s: leaked work request %p, wr_len %d, " 1841 "opcode %x\n", __func__, wr, wr->wr_len, opcode); 1842 /* WR not freed here; go look at it with a debugger. */ 1843 } 1844 } 1845 } 1846 1847 /* 1848 * Ground control to Major TOM 1849 * Commencing countdown, engines on 1850 */ 1851 static int 1852 t4_tom_activate(struct adapter *sc) 1853 { 1854 struct tom_data *td; 1855 struct toedev *tod; 1856 struct vi_info *vi; 1857 int i, rc, v; 1858 1859 ASSERT_SYNCHRONIZED_OP(sc); 1860 1861 /* per-adapter softc for TOM */ 1862 td = malloc(sizeof(*td), M_CXGBE, M_ZERO | M_NOWAIT); 1863 if (td == NULL) 1864 return (ENOMEM); 1865 1866 /* List of TOE PCBs and associated lock */ 1867 mtx_init(&td->toep_list_lock, "PCB list lock", NULL, MTX_DEF); 1868 TAILQ_INIT(&td->toep_list); 1869 1870 /* Listen context */ 1871 mtx_init(&td->lctx_hash_lock, "lctx hash lock", NULL, MTX_DEF); 1872 td->listen_hash = hashinit_flags(LISTEN_HASH_SIZE, M_CXGBE, 1873 &td->listen_mask, HASH_NOWAIT); 1874 1875 /* List of WRs for which L2 resolution failed */ 1876 mtx_init(&td->unsent_wr_lock, "Unsent WR list lock", NULL, MTX_DEF); 1877 STAILQ_INIT(&td->unsent_wr_list); 1878 TASK_INIT(&td->reclaim_wr_resources, 0, reclaim_wr_resources, td); 1879 1880 /* TID tables */ 1881 rc = alloc_tid_tabs(&sc->tids); 1882 if (rc != 0) 1883 goto done; 1884 1885 rc = t4_init_ppod_region(&td->pr, &sc->vres.ddp, 1886 t4_read_reg(sc, A_ULP_RX_TDDP_PSZ), "TDDP page pods"); 1887 if (rc != 0) 1888 goto done; 1889 t4_set_reg_field(sc, A_ULP_RX_TDDP_TAGMASK, 1890 V_TDDPTAGMASK(M_TDDPTAGMASK), td->pr.pr_tag_mask); 1891 1892 alloc_tcb_history(sc, td); 1893 1894 /* toedev ops */ 1895 tod = &td->tod; 1896 init_toedev(tod); 1897 tod->tod_softc = sc; 1898 tod->tod_connect = t4_connect; 1899 tod->tod_listen_start = t4_listen_start; 1900 tod->tod_listen_stop = t4_listen_stop; 1901 tod->tod_rcvd = t4_rcvd; 1902 tod->tod_output = t4_tod_output; 1903 tod->tod_send_rst = t4_send_rst; 1904 tod->tod_send_fin = t4_send_fin; 1905 tod->tod_pcb_detach = t4_pcb_detach; 1906 tod->tod_l2_update = t4_l2_update; 1907 tod->tod_syncache_added = t4_syncache_added; 1908 tod->tod_syncache_removed = t4_syncache_removed; 1909 tod->tod_syncache_respond = t4_syncache_respond; 1910 tod->tod_offload_socket = t4_offload_socket; 1911 tod->tod_ctloutput = t4_ctloutput; 1912 tod->tod_tcp_info = t4_tcp_info; 1913 #ifdef KERN_TLS 1914 tod->tod_alloc_tls_session = t4_alloc_tls_session; 1915 #endif 1916 tod->tod_pmtu_update = t4_pmtu_update; 1917 1918 for_each_port(sc, i) { 1919 for_each_vi(sc->port[i], v, vi) { 1920 TOEDEV(vi->ifp) = &td->tod; 1921 } 1922 } 1923 1924 sc->tom_softc = td; 1925 register_toedev(sc->tom_softc); 1926 1927 done: 1928 if (rc != 0) 1929 free_tom_data(sc, td); 1930 return (rc); 1931 } 1932 1933 static int 1934 t4_tom_deactivate(struct adapter *sc) 1935 { 1936 int rc = 0; 1937 struct tom_data *td = sc->tom_softc; 1938 1939 ASSERT_SYNCHRONIZED_OP(sc); 1940 1941 if (td == NULL) 1942 return (0); /* XXX. KASSERT? */ 1943 1944 if (sc->offload_map != 0) 1945 return (EBUSY); /* at least one port has IFCAP_TOE enabled */ 1946 1947 if (uld_active(sc, ULD_IWARP) || uld_active(sc, ULD_ISCSI)) 1948 return (EBUSY); /* both iWARP and iSCSI rely on the TOE. */ 1949 1950 mtx_lock(&td->toep_list_lock); 1951 if (!TAILQ_EMPTY(&td->toep_list)) 1952 rc = EBUSY; 1953 mtx_unlock(&td->toep_list_lock); 1954 1955 mtx_lock(&td->lctx_hash_lock); 1956 if (td->lctx_count > 0) 1957 rc = EBUSY; 1958 mtx_unlock(&td->lctx_hash_lock); 1959 1960 taskqueue_drain(taskqueue_thread, &td->reclaim_wr_resources); 1961 mtx_lock(&td->unsent_wr_lock); 1962 if (!STAILQ_EMPTY(&td->unsent_wr_list)) 1963 rc = EBUSY; 1964 mtx_unlock(&td->unsent_wr_lock); 1965 1966 if (rc == 0) { 1967 unregister_toedev(sc->tom_softc); 1968 free_tom_data(sc, td); 1969 sc->tom_softc = NULL; 1970 } 1971 1972 return (rc); 1973 } 1974 1975 static int 1976 t4_aio_queue_tom(struct socket *so, struct kaiocb *job) 1977 { 1978 struct tcpcb *tp = so_sototcpcb(so); 1979 struct toepcb *toep = tp->t_toe; 1980 int error; 1981 1982 if (ulp_mode(toep) == ULP_MODE_TCPDDP) { 1983 error = t4_aio_queue_ddp(so, job); 1984 if (error != EOPNOTSUPP) 1985 return (error); 1986 } 1987 1988 return (t4_aio_queue_aiotx(so, job)); 1989 } 1990 1991 static int 1992 t4_tom_mod_load(void) 1993 { 1994 /* CPL handlers */ 1995 t4_register_cpl_handler(CPL_GET_TCB_RPL, do_get_tcb_rpl); 1996 t4_register_shared_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl2, 1997 CPL_COOKIE_TOM); 1998 t4_init_connect_cpl_handlers(); 1999 t4_init_listen_cpl_handlers(); 2000 t4_init_cpl_io_handlers(); 2001 2002 t4_ddp_mod_load(); 2003 t4_tls_mod_load(); 2004 2005 tcp_protosw = pffindproto(PF_INET, IPPROTO_TCP, SOCK_STREAM); 2006 if (tcp_protosw == NULL) 2007 return (ENOPROTOOPT); 2008 bcopy(tcp_protosw, &toe_protosw, sizeof(toe_protosw)); 2009 bcopy(tcp_protosw->pr_usrreqs, &toe_usrreqs, sizeof(toe_usrreqs)); 2010 toe_usrreqs.pru_aio_queue = t4_aio_queue_tom; 2011 toe_protosw.pr_usrreqs = &toe_usrreqs; 2012 2013 tcp6_protosw = pffindproto(PF_INET6, IPPROTO_TCP, SOCK_STREAM); 2014 if (tcp6_protosw == NULL) 2015 return (ENOPROTOOPT); 2016 bcopy(tcp6_protosw, &toe6_protosw, sizeof(toe6_protosw)); 2017 bcopy(tcp6_protosw->pr_usrreqs, &toe6_usrreqs, sizeof(toe6_usrreqs)); 2018 toe6_usrreqs.pru_aio_queue = t4_aio_queue_tom; 2019 toe6_protosw.pr_usrreqs = &toe6_usrreqs; 2020 2021 return (t4_register_uld(&tom_uld_info)); 2022 } 2023 2024 static void 2025 tom_uninit(struct adapter *sc, void *arg __unused) 2026 { 2027 if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4tomun")) 2028 return; 2029 2030 /* Try to free resources (works only if no port has IFCAP_TOE) */ 2031 if (uld_active(sc, ULD_TOM)) 2032 t4_deactivate_uld(sc, ULD_TOM); 2033 2034 end_synchronized_op(sc, 0); 2035 } 2036 2037 static int 2038 t4_tom_mod_unload(void) 2039 { 2040 t4_iterate(tom_uninit, NULL); 2041 2042 if (t4_unregister_uld(&tom_uld_info) == EBUSY) 2043 return (EBUSY); 2044 2045 t4_tls_mod_unload(); 2046 t4_ddp_mod_unload(); 2047 2048 t4_uninit_connect_cpl_handlers(); 2049 t4_uninit_listen_cpl_handlers(); 2050 t4_uninit_cpl_io_handlers(); 2051 t4_register_shared_cpl_handler(CPL_L2T_WRITE_RPL, NULL, CPL_COOKIE_TOM); 2052 t4_register_cpl_handler(CPL_GET_TCB_RPL, NULL); 2053 2054 return (0); 2055 } 2056 #endif /* TCP_OFFLOAD */ 2057 2058 static int 2059 t4_tom_modevent(module_t mod, int cmd, void *arg) 2060 { 2061 int rc = 0; 2062 2063 #ifdef TCP_OFFLOAD 2064 switch (cmd) { 2065 case MOD_LOAD: 2066 rc = t4_tom_mod_load(); 2067 break; 2068 2069 case MOD_UNLOAD: 2070 rc = t4_tom_mod_unload(); 2071 break; 2072 2073 default: 2074 rc = EINVAL; 2075 } 2076 #else 2077 printf("t4_tom: compiled without TCP_OFFLOAD support.\n"); 2078 rc = EOPNOTSUPP; 2079 #endif 2080 return (rc); 2081 } 2082 2083 static moduledata_t t4_tom_moddata= { 2084 "t4_tom", 2085 t4_tom_modevent, 2086 0 2087 }; 2088 2089 MODULE_VERSION(t4_tom, 1); 2090 MODULE_DEPEND(t4_tom, toecore, 1, 1, 1); 2091 MODULE_DEPEND(t4_tom, t4nex, 1, 1, 1); 2092 DECLARE_MODULE(t4_tom, t4_tom_moddata, SI_SUB_EXEC, SI_ORDER_ANY); 2093