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