1 /* 2 * Copyright (c) 2009-2013 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include "opt_inet.h" 36 37 #ifdef TCP_OFFLOAD 38 #include <sys/types.h> 39 #include <sys/malloc.h> 40 #include <sys/socket.h> 41 #include <sys/socketvar.h> 42 #include <sys/sockio.h> 43 #include <sys/taskqueue.h> 44 #include <netinet/in.h> 45 #include <net/route.h> 46 47 #include <netinet/in_systm.h> 48 #include <netinet/in_pcb.h> 49 #include <netinet/ip.h> 50 #include <netinet/ip_var.h> 51 #include <netinet/tcp_var.h> 52 #include <netinet/tcp.h> 53 #include <netinet/tcpip.h> 54 55 #include <netinet/toecore.h> 56 57 struct sge_iq; 58 struct rss_header; 59 #include <linux/types.h> 60 #include "offload.h" 61 #include "tom/t4_tom.h" 62 63 #define TOEPCB(so) ((struct toepcb *)(so_sototcpcb((so))->t_toe)) 64 65 #include "iw_cxgbe.h" 66 #include <linux/module.h> 67 #include <linux/workqueue.h> 68 #include <linux/notifier.h> 69 #include <linux/inetdevice.h> 70 #include <linux/if_vlan.h> 71 #include <net/netevent.h> 72 73 static spinlock_t req_lock; 74 static TAILQ_HEAD(c4iw_ep_list, c4iw_ep_common) req_list; 75 static struct work_struct c4iw_task; 76 static struct workqueue_struct *c4iw_taskq; 77 static LIST_HEAD(timeout_list); 78 static spinlock_t timeout_lock; 79 80 static void process_req(struct work_struct *ctx); 81 static void start_ep_timer(struct c4iw_ep *ep); 82 static void stop_ep_timer(struct c4iw_ep *ep); 83 static int set_tcpinfo(struct c4iw_ep *ep); 84 static enum c4iw_ep_state state_read(struct c4iw_ep_common *epc); 85 static void __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state tostate); 86 static void state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state tostate); 87 static void *alloc_ep(int size, gfp_t flags); 88 void __free_ep(struct c4iw_ep_common *epc); 89 static struct rtentry * find_route(__be32 local_ip, __be32 peer_ip, __be16 local_port, 90 __be16 peer_port, u8 tos); 91 static int close_socket(struct c4iw_ep_common *epc, int close); 92 static int shutdown_socket(struct c4iw_ep_common *epc); 93 static void abort_socket(struct c4iw_ep *ep); 94 static void send_mpa_req(struct c4iw_ep *ep); 95 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen); 96 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen); 97 static void close_complete_upcall(struct c4iw_ep *ep, int status); 98 static int abort_connection(struct c4iw_ep *ep); 99 static void peer_close_upcall(struct c4iw_ep *ep); 100 static void peer_abort_upcall(struct c4iw_ep *ep); 101 static void connect_reply_upcall(struct c4iw_ep *ep, int status); 102 static void connect_request_upcall(struct c4iw_ep *ep); 103 static void established_upcall(struct c4iw_ep *ep); 104 static void process_mpa_reply(struct c4iw_ep *ep); 105 static void process_mpa_request(struct c4iw_ep *ep); 106 static void process_peer_close(struct c4iw_ep *ep); 107 static void process_conn_error(struct c4iw_ep *ep); 108 static void process_close_complete(struct c4iw_ep *ep); 109 static void ep_timeout(unsigned long arg); 110 static void init_sock(struct c4iw_ep_common *epc); 111 static void process_data(struct c4iw_ep *ep); 112 static void process_connected(struct c4iw_ep *ep); 113 static struct socket * dequeue_socket(struct socket *head, struct sockaddr_in **remote, struct c4iw_ep *child_ep); 114 static void process_newconn(struct c4iw_ep *parent_ep); 115 static int c4iw_so_upcall(struct socket *so, void *arg, int waitflag); 116 static void process_socket_event(struct c4iw_ep *ep); 117 static void release_ep_resources(struct c4iw_ep *ep); 118 119 #define START_EP_TIMER(ep) \ 120 do { \ 121 CTR3(KTR_IW_CXGBE, "start_ep_timer (%s:%d) ep %p", \ 122 __func__, __LINE__, (ep)); \ 123 start_ep_timer(ep); \ 124 } while (0) 125 126 #define STOP_EP_TIMER(ep) \ 127 do { \ 128 CTR3(KTR_IW_CXGBE, "stop_ep_timer (%s:%d) ep %p", \ 129 __func__, __LINE__, (ep)); \ 130 stop_ep_timer(ep); \ 131 } while (0) 132 133 #ifdef KTR 134 static char *states[] = { 135 "idle", 136 "listen", 137 "connecting", 138 "mpa_wait_req", 139 "mpa_req_sent", 140 "mpa_req_rcvd", 141 "mpa_rep_sent", 142 "fpdu_mode", 143 "aborting", 144 "closing", 145 "moribund", 146 "dead", 147 NULL, 148 }; 149 #endif 150 151 static void 152 process_req(struct work_struct *ctx) 153 { 154 struct c4iw_ep_common *epc; 155 156 spin_lock(&req_lock); 157 while (!TAILQ_EMPTY(&req_list)) { 158 epc = TAILQ_FIRST(&req_list); 159 TAILQ_REMOVE(&req_list, epc, entry); 160 epc->entry.tqe_prev = NULL; 161 spin_unlock(&req_lock); 162 if (epc->so) 163 process_socket_event((struct c4iw_ep *)epc); 164 c4iw_put_ep(epc); 165 spin_lock(&req_lock); 166 } 167 spin_unlock(&req_lock); 168 } 169 170 /* 171 * XXX: doesn't belong here in the iWARP driver. 172 * XXX: assumes that the connection was offloaded by cxgbe/t4_tom if TF_TOE is 173 * set. Is this a valid assumption for active open? 174 */ 175 static int 176 set_tcpinfo(struct c4iw_ep *ep) 177 { 178 struct socket *so = ep->com.so; 179 struct inpcb *inp = sotoinpcb(so); 180 struct tcpcb *tp; 181 struct toepcb *toep; 182 int rc = 0; 183 184 INP_WLOCK(inp); 185 tp = intotcpcb(inp); 186 if ((tp->t_flags & TF_TOE) == 0) { 187 rc = EINVAL; 188 log(LOG_ERR, "%s: connection not offloaded (so %p, ep %p)\n", 189 __func__, so, ep); 190 goto done; 191 } 192 toep = TOEPCB(so); 193 194 ep->hwtid = toep->tid; 195 ep->snd_seq = tp->snd_nxt; 196 ep->rcv_seq = tp->rcv_nxt; 197 ep->emss = max(tp->t_maxseg, 128); 198 done: 199 INP_WUNLOCK(inp); 200 return (rc); 201 202 } 203 204 static struct rtentry * 205 find_route(__be32 local_ip, __be32 peer_ip, __be16 local_port, 206 __be16 peer_port, u8 tos) 207 { 208 struct route iproute; 209 struct sockaddr_in *dst = (struct sockaddr_in *)&iproute.ro_dst; 210 211 CTR5(KTR_IW_CXGBE, "%s:frtB %x, %x, %d, %d", __func__, local_ip, 212 peer_ip, ntohs(local_port), ntohs(peer_port)); 213 bzero(&iproute, sizeof iproute); 214 dst->sin_family = AF_INET; 215 dst->sin_len = sizeof *dst; 216 dst->sin_addr.s_addr = peer_ip; 217 218 rtalloc(&iproute); 219 CTR2(KTR_IW_CXGBE, "%s:frtE %p", __func__, (uint64_t)iproute.ro_rt); 220 return iproute.ro_rt; 221 } 222 223 static int 224 close_socket(struct c4iw_ep_common *epc, int close) 225 { 226 struct socket *so = epc->so; 227 int rc; 228 229 CTR4(KTR_IW_CXGBE, "%s: so %p, ep %p, state %s", __func__, epc, so, 230 states[epc->state]); 231 232 SOCK_LOCK(so); 233 soupcall_clear(so, SO_RCV); 234 SOCK_UNLOCK(so); 235 236 if (close) 237 rc = soclose(so); 238 else 239 rc = soshutdown(so, SHUT_WR | SHUT_RD); 240 epc->so = NULL; 241 242 return (rc); 243 } 244 245 static int 246 shutdown_socket(struct c4iw_ep_common *epc) 247 { 248 249 CTR4(KTR_IW_CXGBE, "%s: so %p, ep %p, state %s", __func__, epc->so, epc, 250 states[epc->state]); 251 252 return (soshutdown(epc->so, SHUT_WR)); 253 } 254 255 static void 256 abort_socket(struct c4iw_ep *ep) 257 { 258 struct sockopt sopt; 259 int rc; 260 struct linger l; 261 262 CTR4(KTR_IW_CXGBE, "%s ep %p so %p state %s", __func__, ep, ep->com.so, 263 states[ep->com.state]); 264 265 l.l_onoff = 1; 266 l.l_linger = 0; 267 268 /* linger_time of 0 forces RST to be sent */ 269 sopt.sopt_dir = SOPT_SET; 270 sopt.sopt_level = SOL_SOCKET; 271 sopt.sopt_name = SO_LINGER; 272 sopt.sopt_val = (caddr_t)&l; 273 sopt.sopt_valsize = sizeof l; 274 sopt.sopt_td = NULL; 275 rc = sosetopt(ep->com.so, &sopt); 276 if (rc) { 277 log(LOG_ERR, "%s: can't set linger to 0, no RST! err %d\n", 278 __func__, rc); 279 } 280 } 281 282 static void 283 process_peer_close(struct c4iw_ep *ep) 284 { 285 struct c4iw_qp_attributes attrs; 286 int disconnect = 1; 287 int release = 0; 288 289 CTR4(KTR_IW_CXGBE, "%s:ppcB ep %p so %p state %s", __func__, ep, 290 ep->com.so, states[ep->com.state]); 291 292 mutex_lock(&ep->com.mutex); 293 switch (ep->com.state) { 294 295 case MPA_REQ_WAIT: 296 CTR2(KTR_IW_CXGBE, "%s:ppc1 %p MPA_REQ_WAIT CLOSING", 297 __func__, ep); 298 __state_set(&ep->com, CLOSING); 299 break; 300 301 case MPA_REQ_SENT: 302 CTR2(KTR_IW_CXGBE, "%s:ppc2 %p MPA_REQ_SENT CLOSING", 303 __func__, ep); 304 __state_set(&ep->com, DEAD); 305 connect_reply_upcall(ep, -ECONNABORTED); 306 307 disconnect = 0; 308 STOP_EP_TIMER(ep); 309 close_socket(&ep->com, 0); 310 ep->com.cm_id->rem_ref(ep->com.cm_id); 311 ep->com.cm_id = NULL; 312 ep->com.qp = NULL; 313 release = 1; 314 break; 315 316 case MPA_REQ_RCVD: 317 318 /* 319 * We're gonna mark this puppy DEAD, but keep 320 * the reference on it until the ULP accepts or 321 * rejects the CR. 322 */ 323 CTR2(KTR_IW_CXGBE, "%s:ppc3 %p MPA_REQ_RCVD CLOSING", 324 __func__, ep); 325 __state_set(&ep->com, CLOSING); 326 c4iw_get_ep(&ep->com); 327 break; 328 329 case MPA_REP_SENT: 330 CTR2(KTR_IW_CXGBE, "%s:ppc4 %p MPA_REP_SENT CLOSING", 331 __func__, ep); 332 __state_set(&ep->com, CLOSING); 333 break; 334 335 case FPDU_MODE: 336 CTR2(KTR_IW_CXGBE, "%s:ppc5 %p FPDU_MODE CLOSING", 337 __func__, ep); 338 START_EP_TIMER(ep); 339 __state_set(&ep->com, CLOSING); 340 attrs.next_state = C4IW_QP_STATE_CLOSING; 341 c4iw_modify_qp(ep->com.dev, ep->com.qp, 342 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 343 peer_close_upcall(ep); 344 break; 345 346 case ABORTING: 347 CTR2(KTR_IW_CXGBE, "%s:ppc6 %p ABORTING (disconn)", 348 __func__, ep); 349 disconnect = 0; 350 break; 351 352 case CLOSING: 353 CTR2(KTR_IW_CXGBE, "%s:ppc7 %p CLOSING MORIBUND", 354 __func__, ep); 355 __state_set(&ep->com, MORIBUND); 356 disconnect = 0; 357 break; 358 359 case MORIBUND: 360 CTR2(KTR_IW_CXGBE, "%s:ppc8 %p MORIBUND DEAD", __func__, 361 ep); 362 STOP_EP_TIMER(ep); 363 if (ep->com.cm_id && ep->com.qp) { 364 attrs.next_state = C4IW_QP_STATE_IDLE; 365 c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 366 C4IW_QP_ATTR_NEXT_STATE, &attrs, 1); 367 } 368 close_socket(&ep->com, 0); 369 close_complete_upcall(ep, 0); 370 __state_set(&ep->com, DEAD); 371 release = 1; 372 disconnect = 0; 373 break; 374 375 case DEAD: 376 CTR2(KTR_IW_CXGBE, "%s:ppc9 %p DEAD (disconn)", 377 __func__, ep); 378 disconnect = 0; 379 break; 380 381 default: 382 panic("%s: ep %p state %d", __func__, ep, 383 ep->com.state); 384 break; 385 } 386 387 mutex_unlock(&ep->com.mutex); 388 389 if (disconnect) { 390 391 CTR2(KTR_IW_CXGBE, "%s:ppca %p", __func__, ep); 392 c4iw_ep_disconnect(ep, 0, M_NOWAIT); 393 } 394 if (release) { 395 396 CTR2(KTR_IW_CXGBE, "%s:ppcb %p", __func__, ep); 397 c4iw_put_ep(&ep->com); 398 } 399 CTR2(KTR_IW_CXGBE, "%s:ppcE %p", __func__, ep); 400 return; 401 } 402 403 static void 404 process_conn_error(struct c4iw_ep *ep) 405 { 406 struct c4iw_qp_attributes attrs; 407 int ret; 408 int state; 409 410 state = state_read(&ep->com); 411 CTR5(KTR_IW_CXGBE, "%s:pceB ep %p so %p so->so_error %u state %s", 412 __func__, ep, ep->com.so, ep->com.so->so_error, 413 states[ep->com.state]); 414 415 switch (state) { 416 417 case MPA_REQ_WAIT: 418 STOP_EP_TIMER(ep); 419 break; 420 421 case MPA_REQ_SENT: 422 STOP_EP_TIMER(ep); 423 connect_reply_upcall(ep, -ECONNRESET); 424 break; 425 426 case MPA_REP_SENT: 427 ep->com.rpl_err = ECONNRESET; 428 CTR1(KTR_IW_CXGBE, "waking up ep %p", ep); 429 break; 430 431 case MPA_REQ_RCVD: 432 433 /* 434 * We're gonna mark this puppy DEAD, but keep 435 * the reference on it until the ULP accepts or 436 * rejects the CR. 437 */ 438 c4iw_get_ep(&ep->com); 439 break; 440 441 case MORIBUND: 442 case CLOSING: 443 STOP_EP_TIMER(ep); 444 /*FALLTHROUGH*/ 445 case FPDU_MODE: 446 447 if (ep->com.cm_id && ep->com.qp) { 448 449 attrs.next_state = C4IW_QP_STATE_ERROR; 450 ret = c4iw_modify_qp(ep->com.qp->rhp, 451 ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, 452 &attrs, 1); 453 if (ret) 454 log(LOG_ERR, 455 "%s - qp <- error failed!\n", 456 __func__); 457 } 458 peer_abort_upcall(ep); 459 break; 460 461 case ABORTING: 462 break; 463 464 case DEAD: 465 CTR2(KTR_IW_CXGBE, "%s so_error %d IN DEAD STATE!!!!", 466 __func__, ep->com.so->so_error); 467 return; 468 469 default: 470 panic("%s: ep %p state %d", __func__, ep, state); 471 break; 472 } 473 474 if (state != ABORTING) { 475 476 CTR2(KTR_IW_CXGBE, "%s:pce1 %p", __func__, ep); 477 close_socket(&ep->com, 1); 478 state_set(&ep->com, DEAD); 479 c4iw_put_ep(&ep->com); 480 } 481 CTR2(KTR_IW_CXGBE, "%s:pceE %p", __func__, ep); 482 return; 483 } 484 485 static void 486 process_close_complete(struct c4iw_ep *ep) 487 { 488 struct c4iw_qp_attributes attrs; 489 int release = 0; 490 491 CTR4(KTR_IW_CXGBE, "%s:pccB ep %p so %p state %s", __func__, ep, 492 ep->com.so, states[ep->com.state]); 493 494 /* The cm_id may be null if we failed to connect */ 495 mutex_lock(&ep->com.mutex); 496 497 switch (ep->com.state) { 498 499 case CLOSING: 500 CTR2(KTR_IW_CXGBE, "%s:pcc1 %p CLOSING MORIBUND", 501 __func__, ep); 502 __state_set(&ep->com, MORIBUND); 503 break; 504 505 case MORIBUND: 506 CTR2(KTR_IW_CXGBE, "%s:pcc1 %p MORIBUND DEAD", __func__, 507 ep); 508 STOP_EP_TIMER(ep); 509 510 if ((ep->com.cm_id) && (ep->com.qp)) { 511 512 CTR2(KTR_IW_CXGBE, "%s:pcc2 %p QP_STATE_IDLE", 513 __func__, ep); 514 attrs.next_state = C4IW_QP_STATE_IDLE; 515 c4iw_modify_qp(ep->com.dev, 516 ep->com.qp, 517 C4IW_QP_ATTR_NEXT_STATE, 518 &attrs, 1); 519 } 520 521 if (ep->parent_ep) { 522 523 CTR2(KTR_IW_CXGBE, "%s:pcc3 %p", __func__, ep); 524 close_socket(&ep->com, 1); 525 } 526 else { 527 528 CTR2(KTR_IW_CXGBE, "%s:pcc4 %p", __func__, ep); 529 close_socket(&ep->com, 0); 530 } 531 close_complete_upcall(ep, 0); 532 __state_set(&ep->com, DEAD); 533 release = 1; 534 break; 535 536 case ABORTING: 537 CTR2(KTR_IW_CXGBE, "%s:pcc5 %p ABORTING", __func__, ep); 538 break; 539 540 case DEAD: 541 default: 542 CTR2(KTR_IW_CXGBE, "%s:pcc6 %p DEAD", __func__, ep); 543 panic("%s:pcc6 %p DEAD", __func__, ep); 544 break; 545 } 546 mutex_unlock(&ep->com.mutex); 547 548 if (release) { 549 550 CTR2(KTR_IW_CXGBE, "%s:pcc7 %p", __func__, ep); 551 c4iw_put_ep(&ep->com); 552 } 553 CTR2(KTR_IW_CXGBE, "%s:pccE %p", __func__, ep); 554 return; 555 } 556 557 static void 558 init_sock(struct c4iw_ep_common *epc) 559 { 560 int rc; 561 struct sockopt sopt; 562 struct socket *so = epc->so; 563 int on = 1; 564 565 SOCK_LOCK(so); 566 soupcall_set(so, SO_RCV, c4iw_so_upcall, epc); 567 so->so_state |= SS_NBIO; 568 SOCK_UNLOCK(so); 569 sopt.sopt_dir = SOPT_SET; 570 sopt.sopt_level = IPPROTO_TCP; 571 sopt.sopt_name = TCP_NODELAY; 572 sopt.sopt_val = (caddr_t)&on; 573 sopt.sopt_valsize = sizeof on; 574 sopt.sopt_td = NULL; 575 rc = sosetopt(so, &sopt); 576 if (rc) { 577 log(LOG_ERR, "%s: can't set TCP_NODELAY on so %p (%d)\n", 578 __func__, so, rc); 579 } 580 } 581 582 static void 583 process_data(struct c4iw_ep *ep) 584 { 585 struct sockaddr_in *local, *remote; 586 587 CTR5(KTR_IW_CXGBE, "%s: so %p, ep %p, state %s, sbused %d", __func__, 588 ep->com.so, ep, states[ep->com.state], sbused(&ep->com.so->so_rcv)); 589 590 switch (state_read(&ep->com)) { 591 case MPA_REQ_SENT: 592 process_mpa_reply(ep); 593 break; 594 case MPA_REQ_WAIT: 595 in_getsockaddr(ep->com.so, (struct sockaddr **)&local); 596 in_getpeeraddr(ep->com.so, (struct sockaddr **)&remote); 597 ep->com.local_addr = *local; 598 ep->com.remote_addr = *remote; 599 free(local, M_SONAME); 600 free(remote, M_SONAME); 601 process_mpa_request(ep); 602 break; 603 default: 604 if (sbused(&ep->com.so->so_rcv)) 605 log(LOG_ERR, "%s: Unexpected streaming data. ep %p, " 606 "state %d, so %p, so_state 0x%x, sbused %u\n", 607 __func__, ep, state_read(&ep->com), ep->com.so, 608 ep->com.so->so_state, sbused(&ep->com.so->so_rcv)); 609 break; 610 } 611 } 612 613 static void 614 process_connected(struct c4iw_ep *ep) 615 { 616 617 if ((ep->com.so->so_state & SS_ISCONNECTED) && !ep->com.so->so_error) 618 send_mpa_req(ep); 619 else { 620 connect_reply_upcall(ep, -ep->com.so->so_error); 621 close_socket(&ep->com, 0); 622 state_set(&ep->com, DEAD); 623 c4iw_put_ep(&ep->com); 624 } 625 } 626 627 static struct socket * 628 dequeue_socket(struct socket *head, struct sockaddr_in **remote, 629 struct c4iw_ep *child_ep) 630 { 631 struct socket *so; 632 633 ACCEPT_LOCK(); 634 so = TAILQ_FIRST(&head->so_comp); 635 if (!so) { 636 ACCEPT_UNLOCK(); 637 return (NULL); 638 } 639 TAILQ_REMOVE(&head->so_comp, so, so_list); 640 head->so_qlen--; 641 SOCK_LOCK(so); 642 so->so_qstate &= ~SQ_COMP; 643 so->so_head = NULL; 644 soref(so); 645 soupcall_set(so, SO_RCV, c4iw_so_upcall, child_ep); 646 so->so_state |= SS_NBIO; 647 SOCK_UNLOCK(so); 648 ACCEPT_UNLOCK(); 649 soaccept(so, (struct sockaddr **)remote); 650 651 return (so); 652 } 653 654 static void 655 process_newconn(struct c4iw_ep *parent_ep) 656 { 657 struct socket *child_so; 658 struct c4iw_ep *child_ep; 659 struct sockaddr_in *remote; 660 661 child_ep = alloc_ep(sizeof(*child_ep), M_NOWAIT); 662 if (!child_ep) { 663 CTR3(KTR_IW_CXGBE, "%s: parent so %p, parent ep %p, ENOMEM", 664 __func__, parent_ep->com.so, parent_ep); 665 log(LOG_ERR, "%s: failed to allocate ep entry\n", __func__); 666 return; 667 } 668 669 child_so = dequeue_socket(parent_ep->com.so, &remote, child_ep); 670 if (!child_so) { 671 CTR4(KTR_IW_CXGBE, 672 "%s: parent so %p, parent ep %p, child ep %p, dequeue err", 673 __func__, parent_ep->com.so, parent_ep, child_ep); 674 log(LOG_ERR, "%s: failed to dequeue child socket\n", __func__); 675 __free_ep(&child_ep->com); 676 return; 677 678 } 679 680 CTR5(KTR_IW_CXGBE, 681 "%s: parent so %p, parent ep %p, child so %p, child ep %p", 682 __func__, parent_ep->com.so, parent_ep, child_so, child_ep); 683 684 child_ep->com.local_addr = parent_ep->com.local_addr; 685 child_ep->com.remote_addr = *remote; 686 child_ep->com.dev = parent_ep->com.dev; 687 child_ep->com.so = child_so; 688 child_ep->com.cm_id = NULL; 689 child_ep->com.thread = parent_ep->com.thread; 690 child_ep->parent_ep = parent_ep; 691 692 free(remote, M_SONAME); 693 c4iw_get_ep(&parent_ep->com); 694 child_ep->parent_ep = parent_ep; 695 init_timer(&child_ep->timer); 696 state_set(&child_ep->com, MPA_REQ_WAIT); 697 START_EP_TIMER(child_ep); 698 699 /* maybe the request has already been queued up on the socket... */ 700 process_mpa_request(child_ep); 701 } 702 703 static int 704 c4iw_so_upcall(struct socket *so, void *arg, int waitflag) 705 { 706 struct c4iw_ep *ep = arg; 707 708 spin_lock(&req_lock); 709 710 CTR6(KTR_IW_CXGBE, 711 "%s: so %p, so_state 0x%x, ep %p, ep_state %s, tqe_prev %p", 712 __func__, so, so->so_state, ep, states[ep->com.state], 713 ep->com.entry.tqe_prev); 714 715 if (ep && ep->com.so && !ep->com.entry.tqe_prev) { 716 KASSERT(ep->com.so == so, ("%s: XXX review.", __func__)); 717 c4iw_get_ep(&ep->com); 718 TAILQ_INSERT_TAIL(&req_list, &ep->com, entry); 719 queue_work(c4iw_taskq, &c4iw_task); 720 } 721 722 spin_unlock(&req_lock); 723 return (SU_OK); 724 } 725 726 static void 727 process_socket_event(struct c4iw_ep *ep) 728 { 729 int state = state_read(&ep->com); 730 struct socket *so = ep->com.so; 731 732 CTR6(KTR_IW_CXGBE, "process_socket_event: so %p, so_state 0x%x, " 733 "so_err %d, sb_state 0x%x, ep %p, ep_state %s", so, so->so_state, 734 so->so_error, so->so_rcv.sb_state, ep, states[state]); 735 736 if (state == CONNECTING) { 737 process_connected(ep); 738 return; 739 } 740 741 if (state == LISTEN) { 742 process_newconn(ep); 743 return; 744 } 745 746 /* connection error */ 747 if (so->so_error) { 748 process_conn_error(ep); 749 return; 750 } 751 752 /* peer close */ 753 if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && state < CLOSING) { 754 process_peer_close(ep); 755 return; 756 } 757 758 /* close complete */ 759 if (so->so_state & SS_ISDISCONNECTED) { 760 process_close_complete(ep); 761 return; 762 } 763 764 /* rx data */ 765 process_data(ep); 766 } 767 768 SYSCTL_NODE(_hw, OID_AUTO, iw_cxgbe, CTLFLAG_RD, 0, "iw_cxgbe driver parameters"); 769 770 int db_delay_usecs = 1; 771 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, db_delay_usecs, CTLFLAG_RWTUN, &db_delay_usecs, 0, 772 "Usecs to delay awaiting db fifo to drain"); 773 774 static int dack_mode = 1; 775 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, dack_mode, CTLFLAG_RWTUN, &dack_mode, 0, 776 "Delayed ack mode (default = 1)"); 777 778 int c4iw_max_read_depth = 8; 779 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_max_read_depth, CTLFLAG_RWTUN, &c4iw_max_read_depth, 0, 780 "Per-connection max ORD/IRD (default = 8)"); 781 782 static int enable_tcp_timestamps; 783 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_timestamps, CTLFLAG_RWTUN, &enable_tcp_timestamps, 0, 784 "Enable tcp timestamps (default = 0)"); 785 786 static int enable_tcp_sack; 787 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_sack, CTLFLAG_RWTUN, &enable_tcp_sack, 0, 788 "Enable tcp SACK (default = 0)"); 789 790 static int enable_tcp_window_scaling = 1; 791 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, enable_tcp_window_scaling, CTLFLAG_RWTUN, &enable_tcp_window_scaling, 0, 792 "Enable tcp window scaling (default = 1)"); 793 794 int c4iw_debug = 1; 795 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, c4iw_debug, CTLFLAG_RWTUN, &c4iw_debug, 0, 796 "Enable debug logging (default = 0)"); 797 798 static int peer2peer; 799 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, peer2peer, CTLFLAG_RWTUN, &peer2peer, 0, 800 "Support peer2peer ULPs (default = 0)"); 801 802 static int p2p_type = FW_RI_INIT_P2PTYPE_READ_REQ; 803 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, p2p_type, CTLFLAG_RWTUN, &p2p_type, 0, 804 "RDMAP opcode to use for the RTR message: 1 = RDMA_READ 0 = RDMA_WRITE (default 1)"); 805 806 static int ep_timeout_secs = 60; 807 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, ep_timeout_secs, CTLFLAG_RWTUN, &ep_timeout_secs, 0, 808 "CM Endpoint operation timeout in seconds (default = 60)"); 809 810 static int mpa_rev = 1; 811 #ifdef IW_CM_MPAV2 812 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, mpa_rev, CTLFLAG_RWTUN, &mpa_rev, 0, 813 "MPA Revision, 0 supports amso1100, 1 is RFC0544 spec compliant, 2 is IETF MPA Peer Connect Draft compliant (default = 1)"); 814 #else 815 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, mpa_rev, CTLFLAG_RWTUN, &mpa_rev, 0, 816 "MPA Revision, 0 supports amso1100, 1 is RFC0544 spec compliant (default = 1)"); 817 #endif 818 819 static int markers_enabled; 820 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, markers_enabled, CTLFLAG_RWTUN, &markers_enabled, 0, 821 "Enable MPA MARKERS (default(0) = disabled)"); 822 823 static int crc_enabled = 1; 824 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, crc_enabled, CTLFLAG_RWTUN, &crc_enabled, 0, 825 "Enable MPA CRC (default(1) = enabled)"); 826 827 static int rcv_win = 256 * 1024; 828 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, rcv_win, CTLFLAG_RWTUN, &rcv_win, 0, 829 "TCP receive window in bytes (default = 256KB)"); 830 831 static int snd_win = 128 * 1024; 832 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, snd_win, CTLFLAG_RWTUN, &snd_win, 0, 833 "TCP send window in bytes (default = 128KB)"); 834 835 int db_fc_threshold = 2000; 836 SYSCTL_INT(_hw_iw_cxgbe, OID_AUTO, db_fc_threshold, CTLFLAG_RWTUN, &db_fc_threshold, 0, 837 "QP count/threshold that triggers automatic"); 838 839 static void 840 start_ep_timer(struct c4iw_ep *ep) 841 { 842 843 if (timer_pending(&ep->timer)) { 844 CTR2(KTR_IW_CXGBE, "%s: ep %p, already started", __func__, ep); 845 printk(KERN_ERR "%s timer already started! ep %p\n", __func__, 846 ep); 847 return; 848 } 849 clear_bit(TIMEOUT, &ep->com.flags); 850 c4iw_get_ep(&ep->com); 851 ep->timer.expires = jiffies + ep_timeout_secs * HZ; 852 ep->timer.data = (unsigned long)ep; 853 ep->timer.function = ep_timeout; 854 add_timer(&ep->timer); 855 } 856 857 static void 858 stop_ep_timer(struct c4iw_ep *ep) 859 { 860 861 del_timer_sync(&ep->timer); 862 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) { 863 c4iw_put_ep(&ep->com); 864 } 865 } 866 867 static enum 868 c4iw_ep_state state_read(struct c4iw_ep_common *epc) 869 { 870 enum c4iw_ep_state state; 871 872 mutex_lock(&epc->mutex); 873 state = epc->state; 874 mutex_unlock(&epc->mutex); 875 876 return (state); 877 } 878 879 static void 880 __state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) 881 { 882 883 epc->state = new; 884 } 885 886 static void 887 state_set(struct c4iw_ep_common *epc, enum c4iw_ep_state new) 888 { 889 890 mutex_lock(&epc->mutex); 891 __state_set(epc, new); 892 mutex_unlock(&epc->mutex); 893 } 894 895 static void * 896 alloc_ep(int size, gfp_t gfp) 897 { 898 struct c4iw_ep_common *epc; 899 900 epc = kzalloc(size, gfp); 901 if (epc == NULL) 902 return (NULL); 903 904 kref_init(&epc->kref); 905 mutex_init(&epc->mutex); 906 c4iw_init_wr_wait(&epc->wr_wait); 907 908 return (epc); 909 } 910 911 void 912 __free_ep(struct c4iw_ep_common *epc) 913 { 914 CTR2(KTR_IW_CXGBE, "%s:feB %p", __func__, epc); 915 KASSERT(!epc->so, ("%s warning ep->so %p \n", __func__, epc->so)); 916 KASSERT(!epc->entry.tqe_prev, ("%s epc %p still on req list!\n", __func__, epc)); 917 free(epc, M_DEVBUF); 918 CTR2(KTR_IW_CXGBE, "%s:feE %p", __func__, epc); 919 } 920 921 void _c4iw_free_ep(struct kref *kref) 922 { 923 struct c4iw_ep *ep; 924 struct c4iw_ep_common *epc; 925 926 ep = container_of(kref, struct c4iw_ep, com.kref); 927 epc = &ep->com; 928 KASSERT(!epc->so, ("%s ep->so %p", __func__, epc->so)); 929 KASSERT(!epc->entry.tqe_prev, ("%s epc %p still on req list", 930 __func__, epc)); 931 kfree(ep); 932 } 933 934 static void release_ep_resources(struct c4iw_ep *ep) 935 { 936 CTR2(KTR_IW_CXGBE, "%s:rerB %p", __func__, ep); 937 set_bit(RELEASE_RESOURCES, &ep->com.flags); 938 c4iw_put_ep(&ep->com); 939 CTR2(KTR_IW_CXGBE, "%s:rerE %p", __func__, ep); 940 } 941 942 static void 943 send_mpa_req(struct c4iw_ep *ep) 944 { 945 int mpalen; 946 struct mpa_message *mpa; 947 struct mpa_v2_conn_params mpa_v2_params; 948 struct mbuf *m; 949 char mpa_rev_to_use = mpa_rev; 950 int err; 951 952 if (ep->retry_with_mpa_v1) 953 mpa_rev_to_use = 1; 954 mpalen = sizeof(*mpa) + ep->plen; 955 if (mpa_rev_to_use == 2) 956 mpalen += sizeof(struct mpa_v2_conn_params); 957 958 if (mpalen > MHLEN) 959 CXGBE_UNIMPLEMENTED(__func__); 960 961 m = m_gethdr(M_NOWAIT, MT_DATA); 962 if (m == NULL) { 963 connect_reply_upcall(ep, -ENOMEM); 964 return; 965 } 966 967 mpa = mtod(m, struct mpa_message *); 968 m->m_len = mpalen; 969 m->m_pkthdr.len = mpalen; 970 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); 971 mpa->flags = (crc_enabled ? MPA_CRC : 0) | 972 (markers_enabled ? MPA_MARKERS : 0) | 973 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0); 974 mpa->private_data_size = htons(ep->plen); 975 mpa->revision = mpa_rev_to_use; 976 977 if (mpa_rev_to_use == 1) { 978 ep->tried_with_mpa_v1 = 1; 979 ep->retry_with_mpa_v1 = 0; 980 } 981 982 if (mpa_rev_to_use == 2) { 983 mpa->private_data_size += 984 htons(sizeof(struct mpa_v2_conn_params)); 985 mpa_v2_params.ird = htons((u16)ep->ird); 986 mpa_v2_params.ord = htons((u16)ep->ord); 987 988 if (peer2peer) { 989 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); 990 991 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) { 992 mpa_v2_params.ord |= 993 htons(MPA_V2_RDMA_WRITE_RTR); 994 } else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) { 995 mpa_v2_params.ord |= 996 htons(MPA_V2_RDMA_READ_RTR); 997 } 998 } 999 memcpy(mpa->private_data, &mpa_v2_params, 1000 sizeof(struct mpa_v2_conn_params)); 1001 1002 if (ep->plen) { 1003 1004 memcpy(mpa->private_data + 1005 sizeof(struct mpa_v2_conn_params), 1006 ep->mpa_pkt + sizeof(*mpa), ep->plen); 1007 } 1008 } else { 1009 1010 if (ep->plen) 1011 memcpy(mpa->private_data, 1012 ep->mpa_pkt + sizeof(*mpa), ep->plen); 1013 CTR2(KTR_IW_CXGBE, "%s:smr7 %p", __func__, ep); 1014 } 1015 1016 err = sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT, ep->com.thread); 1017 if (err) { 1018 connect_reply_upcall(ep, -ENOMEM); 1019 return; 1020 } 1021 1022 START_EP_TIMER(ep); 1023 state_set(&ep->com, MPA_REQ_SENT); 1024 ep->mpa_attr.initiator = 1; 1025 } 1026 1027 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen) 1028 { 1029 int mpalen ; 1030 struct mpa_message *mpa; 1031 struct mpa_v2_conn_params mpa_v2_params; 1032 struct mbuf *m; 1033 int err; 1034 1035 CTR4(KTR_IW_CXGBE, "%s:smrejB %p %u %d", __func__, ep, ep->hwtid, 1036 ep->plen); 1037 1038 mpalen = sizeof(*mpa) + plen; 1039 1040 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1041 1042 mpalen += sizeof(struct mpa_v2_conn_params); 1043 CTR4(KTR_IW_CXGBE, "%s:smrej1 %p %u %d", __func__, ep, 1044 ep->mpa_attr.version, mpalen); 1045 } 1046 1047 if (mpalen > MHLEN) 1048 CXGBE_UNIMPLEMENTED(__func__); 1049 1050 m = m_gethdr(M_NOWAIT, MT_DATA); 1051 if (m == NULL) { 1052 1053 printf("%s - cannot alloc mbuf!\n", __func__); 1054 CTR2(KTR_IW_CXGBE, "%s:smrej2 %p", __func__, ep); 1055 return (-ENOMEM); 1056 } 1057 1058 1059 mpa = mtod(m, struct mpa_message *); 1060 m->m_len = mpalen; 1061 m->m_pkthdr.len = mpalen; 1062 memset(mpa, 0, sizeof(*mpa)); 1063 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 1064 mpa->flags = MPA_REJECT; 1065 mpa->revision = mpa_rev; 1066 mpa->private_data_size = htons(plen); 1067 1068 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1069 1070 mpa->flags |= MPA_ENHANCED_RDMA_CONN; 1071 mpa->private_data_size += 1072 htons(sizeof(struct mpa_v2_conn_params)); 1073 mpa_v2_params.ird = htons(((u16)ep->ird) | 1074 (peer2peer ? MPA_V2_PEER2PEER_MODEL : 1075 0)); 1076 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ? 1077 (p2p_type == 1078 FW_RI_INIT_P2PTYPE_RDMA_WRITE ? 1079 MPA_V2_RDMA_WRITE_RTR : p2p_type == 1080 FW_RI_INIT_P2PTYPE_READ_REQ ? 1081 MPA_V2_RDMA_READ_RTR : 0) : 0)); 1082 memcpy(mpa->private_data, &mpa_v2_params, 1083 sizeof(struct mpa_v2_conn_params)); 1084 1085 if (ep->plen) 1086 memcpy(mpa->private_data + 1087 sizeof(struct mpa_v2_conn_params), pdata, plen); 1088 CTR5(KTR_IW_CXGBE, "%s:smrej3 %p %d %d %d", __func__, ep, 1089 mpa_v2_params.ird, mpa_v2_params.ord, ep->plen); 1090 } else 1091 if (plen) 1092 memcpy(mpa->private_data, pdata, plen); 1093 1094 err = sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT, ep->com.thread); 1095 if (!err) 1096 ep->snd_seq += mpalen; 1097 CTR4(KTR_IW_CXGBE, "%s:smrejE %p %u %d", __func__, ep, ep->hwtid, err); 1098 return err; 1099 } 1100 1101 static int send_mpa_reply(struct c4iw_ep *ep, const void *pdata, u8 plen) 1102 { 1103 int mpalen; 1104 struct mpa_message *mpa; 1105 struct mbuf *m; 1106 struct mpa_v2_conn_params mpa_v2_params; 1107 int err; 1108 1109 CTR2(KTR_IW_CXGBE, "%s:smrepB %p", __func__, ep); 1110 1111 mpalen = sizeof(*mpa) + plen; 1112 1113 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1114 1115 CTR3(KTR_IW_CXGBE, "%s:smrep1 %p %d", __func__, ep, 1116 ep->mpa_attr.version); 1117 mpalen += sizeof(struct mpa_v2_conn_params); 1118 } 1119 1120 if (mpalen > MHLEN) 1121 CXGBE_UNIMPLEMENTED(__func__); 1122 1123 m = m_gethdr(M_NOWAIT, MT_DATA); 1124 if (m == NULL) { 1125 1126 CTR2(KTR_IW_CXGBE, "%s:smrep2 %p", __func__, ep); 1127 printf("%s - cannot alloc mbuf!\n", __func__); 1128 return (-ENOMEM); 1129 } 1130 1131 1132 mpa = mtod(m, struct mpa_message *); 1133 m->m_len = mpalen; 1134 m->m_pkthdr.len = mpalen; 1135 memset(mpa, 0, sizeof(*mpa)); 1136 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 1137 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | 1138 (markers_enabled ? MPA_MARKERS : 0); 1139 mpa->revision = ep->mpa_attr.version; 1140 mpa->private_data_size = htons(plen); 1141 1142 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1143 1144 mpa->flags |= MPA_ENHANCED_RDMA_CONN; 1145 mpa->private_data_size += 1146 htons(sizeof(struct mpa_v2_conn_params)); 1147 mpa_v2_params.ird = htons((u16)ep->ird); 1148 mpa_v2_params.ord = htons((u16)ep->ord); 1149 CTR5(KTR_IW_CXGBE, "%s:smrep3 %p %d %d %d", __func__, ep, 1150 ep->mpa_attr.version, mpa_v2_params.ird, mpa_v2_params.ord); 1151 1152 if (peer2peer && (ep->mpa_attr.p2p_type != 1153 FW_RI_INIT_P2PTYPE_DISABLED)) { 1154 1155 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); 1156 1157 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) { 1158 1159 mpa_v2_params.ord |= 1160 htons(MPA_V2_RDMA_WRITE_RTR); 1161 CTR5(KTR_IW_CXGBE, "%s:smrep4 %p %d %d %d", 1162 __func__, ep, p2p_type, mpa_v2_params.ird, 1163 mpa_v2_params.ord); 1164 } 1165 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) { 1166 1167 mpa_v2_params.ord |= 1168 htons(MPA_V2_RDMA_READ_RTR); 1169 CTR5(KTR_IW_CXGBE, "%s:smrep5 %p %d %d %d", 1170 __func__, ep, p2p_type, mpa_v2_params.ird, 1171 mpa_v2_params.ord); 1172 } 1173 } 1174 1175 memcpy(mpa->private_data, &mpa_v2_params, 1176 sizeof(struct mpa_v2_conn_params)); 1177 1178 if (ep->plen) 1179 memcpy(mpa->private_data + 1180 sizeof(struct mpa_v2_conn_params), pdata, plen); 1181 } else 1182 if (plen) 1183 memcpy(mpa->private_data, pdata, plen); 1184 1185 state_set(&ep->com, MPA_REP_SENT); 1186 ep->snd_seq += mpalen; 1187 err = sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT, 1188 ep->com.thread); 1189 CTR3(KTR_IW_CXGBE, "%s:smrepE %p %d", __func__, ep, err); 1190 return err; 1191 } 1192 1193 1194 1195 static void close_complete_upcall(struct c4iw_ep *ep, int status) 1196 { 1197 struct iw_cm_event event; 1198 1199 CTR2(KTR_IW_CXGBE, "%s:ccuB %p", __func__, ep); 1200 memset(&event, 0, sizeof(event)); 1201 event.event = IW_CM_EVENT_CLOSE; 1202 event.status = status; 1203 1204 if (ep->com.cm_id) { 1205 1206 CTR2(KTR_IW_CXGBE, "%s:ccu1 %1", __func__, ep); 1207 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1208 ep->com.cm_id->rem_ref(ep->com.cm_id); 1209 ep->com.cm_id = NULL; 1210 ep->com.qp = NULL; 1211 set_bit(CLOSE_UPCALL, &ep->com.history); 1212 } 1213 CTR2(KTR_IW_CXGBE, "%s:ccuE %p", __func__, ep); 1214 } 1215 1216 static int abort_connection(struct c4iw_ep *ep) 1217 { 1218 int err; 1219 1220 CTR2(KTR_IW_CXGBE, "%s:abB %p", __func__, ep); 1221 close_complete_upcall(ep, -ECONNRESET); 1222 state_set(&ep->com, ABORTING); 1223 abort_socket(ep); 1224 err = close_socket(&ep->com, 0); 1225 set_bit(ABORT_CONN, &ep->com.history); 1226 CTR2(KTR_IW_CXGBE, "%s:abE %p", __func__, ep); 1227 return err; 1228 } 1229 1230 static void peer_close_upcall(struct c4iw_ep *ep) 1231 { 1232 struct iw_cm_event event; 1233 1234 CTR2(KTR_IW_CXGBE, "%s:pcuB %p", __func__, ep); 1235 memset(&event, 0, sizeof(event)); 1236 event.event = IW_CM_EVENT_DISCONNECT; 1237 1238 if (ep->com.cm_id) { 1239 1240 CTR2(KTR_IW_CXGBE, "%s:pcu1 %p", __func__, ep); 1241 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1242 set_bit(DISCONN_UPCALL, &ep->com.history); 1243 } 1244 CTR2(KTR_IW_CXGBE, "%s:pcuE %p", __func__, ep); 1245 } 1246 1247 static void peer_abort_upcall(struct c4iw_ep *ep) 1248 { 1249 struct iw_cm_event event; 1250 1251 CTR2(KTR_IW_CXGBE, "%s:pauB %p", __func__, ep); 1252 memset(&event, 0, sizeof(event)); 1253 event.event = IW_CM_EVENT_CLOSE; 1254 event.status = -ECONNRESET; 1255 1256 if (ep->com.cm_id) { 1257 1258 CTR2(KTR_IW_CXGBE, "%s:pau1 %p", __func__, ep); 1259 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1260 ep->com.cm_id->rem_ref(ep->com.cm_id); 1261 ep->com.cm_id = NULL; 1262 ep->com.qp = NULL; 1263 set_bit(ABORT_UPCALL, &ep->com.history); 1264 } 1265 CTR2(KTR_IW_CXGBE, "%s:pauE %p", __func__, ep); 1266 } 1267 1268 static void connect_reply_upcall(struct c4iw_ep *ep, int status) 1269 { 1270 struct iw_cm_event event; 1271 1272 CTR3(KTR_IW_CXGBE, "%s:cruB %p", __func__, ep, status); 1273 memset(&event, 0, sizeof(event)); 1274 event.event = IW_CM_EVENT_CONNECT_REPLY; 1275 event.status = (status ==-ECONNABORTED)?-ECONNRESET: status; 1276 event.local_addr = ep->com.local_addr; 1277 event.remote_addr = ep->com.remote_addr; 1278 1279 if ((status == 0) || (status == -ECONNREFUSED)) { 1280 1281 if (!ep->tried_with_mpa_v1) { 1282 1283 CTR2(KTR_IW_CXGBE, "%s:cru1 %p", __func__, ep); 1284 /* this means MPA_v2 is used */ 1285 event.private_data_len = ep->plen - 1286 sizeof(struct mpa_v2_conn_params); 1287 event.private_data = ep->mpa_pkt + 1288 sizeof(struct mpa_message) + 1289 sizeof(struct mpa_v2_conn_params); 1290 } else { 1291 1292 CTR2(KTR_IW_CXGBE, "%s:cru2 %p", __func__, ep); 1293 /* this means MPA_v1 is used */ 1294 event.private_data_len = ep->plen; 1295 event.private_data = ep->mpa_pkt + 1296 sizeof(struct mpa_message); 1297 } 1298 } 1299 1300 if (ep->com.cm_id) { 1301 1302 CTR2(KTR_IW_CXGBE, "%s:cru3 %p", __func__, ep); 1303 set_bit(CONN_RPL_UPCALL, &ep->com.history); 1304 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1305 } 1306 1307 if(status == -ECONNABORTED) { 1308 1309 CTR3(KTR_IW_CXGBE, "%s:cruE %p %d", __func__, ep, status); 1310 return; 1311 } 1312 1313 if (status < 0) { 1314 1315 CTR3(KTR_IW_CXGBE, "%s:cru4 %p %d", __func__, ep, status); 1316 ep->com.cm_id->rem_ref(ep->com.cm_id); 1317 ep->com.cm_id = NULL; 1318 ep->com.qp = NULL; 1319 } 1320 1321 CTR2(KTR_IW_CXGBE, "%s:cruE %p", __func__, ep); 1322 } 1323 1324 static void connect_request_upcall(struct c4iw_ep *ep) 1325 { 1326 struct iw_cm_event event; 1327 1328 CTR3(KTR_IW_CXGBE, "%s: ep %p, mpa_v1 %d", __func__, ep, 1329 ep->tried_with_mpa_v1); 1330 1331 memset(&event, 0, sizeof(event)); 1332 event.event = IW_CM_EVENT_CONNECT_REQUEST; 1333 event.local_addr = ep->com.local_addr; 1334 event.remote_addr = ep->com.remote_addr; 1335 event.provider_data = ep; 1336 event.so = ep->com.so; 1337 1338 if (!ep->tried_with_mpa_v1) { 1339 /* this means MPA_v2 is used */ 1340 #ifdef IW_CM_MPAV2 1341 event.ord = ep->ord; 1342 event.ird = ep->ird; 1343 #endif 1344 event.private_data_len = ep->plen - 1345 sizeof(struct mpa_v2_conn_params); 1346 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) + 1347 sizeof(struct mpa_v2_conn_params); 1348 } else { 1349 1350 /* this means MPA_v1 is used. Send max supported */ 1351 #ifdef IW_CM_MPAV2 1352 event.ord = c4iw_max_read_depth; 1353 event.ird = c4iw_max_read_depth; 1354 #endif 1355 event.private_data_len = ep->plen; 1356 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); 1357 } 1358 1359 c4iw_get_ep(&ep->com); 1360 ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id, 1361 &event); 1362 set_bit(CONNREQ_UPCALL, &ep->com.history); 1363 c4iw_put_ep(&ep->parent_ep->com); 1364 } 1365 1366 static void established_upcall(struct c4iw_ep *ep) 1367 { 1368 struct iw_cm_event event; 1369 1370 CTR2(KTR_IW_CXGBE, "%s:euB %p", __func__, ep); 1371 memset(&event, 0, sizeof(event)); 1372 event.event = IW_CM_EVENT_ESTABLISHED; 1373 #ifdef IW_CM_MPAV2 1374 event.ird = ep->ird; 1375 event.ord = ep->ord; 1376 #endif 1377 if (ep->com.cm_id) { 1378 1379 CTR2(KTR_IW_CXGBE, "%s:eu1 %p", __func__, ep); 1380 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1381 set_bit(ESTAB_UPCALL, &ep->com.history); 1382 } 1383 CTR2(KTR_IW_CXGBE, "%s:euE %p", __func__, ep); 1384 } 1385 1386 1387 1388 static void process_mpa_reply(struct c4iw_ep *ep) 1389 { 1390 struct mpa_message *mpa; 1391 struct mpa_v2_conn_params *mpa_v2_params; 1392 u16 plen; 1393 u16 resp_ird, resp_ord; 1394 u8 rtr_mismatch = 0, insuff_ird = 0; 1395 struct c4iw_qp_attributes attrs; 1396 enum c4iw_qp_attr_mask mask; 1397 int err; 1398 struct mbuf *top, *m; 1399 int flags = MSG_DONTWAIT; 1400 struct uio uio; 1401 1402 CTR2(KTR_IW_CXGBE, "%s:pmrB %p", __func__, ep); 1403 1404 /* 1405 * Stop mpa timer. If it expired, then the state has 1406 * changed and we bail since ep_timeout already aborted 1407 * the connection. 1408 */ 1409 STOP_EP_TIMER(ep); 1410 if (state_read(&ep->com) != MPA_REQ_SENT) 1411 return; 1412 1413 uio.uio_resid = 1000000; 1414 uio.uio_td = ep->com.thread; 1415 err = soreceive(ep->com.so, NULL, &uio, &top, NULL, &flags); 1416 1417 if (err) { 1418 1419 if (err == EWOULDBLOCK) { 1420 1421 CTR2(KTR_IW_CXGBE, "%s:pmr1 %p", __func__, ep); 1422 START_EP_TIMER(ep); 1423 return; 1424 } 1425 err = -err; 1426 CTR2(KTR_IW_CXGBE, "%s:pmr2 %p", __func__, ep); 1427 goto err; 1428 } 1429 1430 if (ep->com.so->so_rcv.sb_mb) { 1431 1432 CTR2(KTR_IW_CXGBE, "%s:pmr3 %p", __func__, ep); 1433 printf("%s data after soreceive called! so %p sb_mb %p top %p\n", 1434 __func__, ep->com.so, ep->com.so->so_rcv.sb_mb, top); 1435 } 1436 1437 m = top; 1438 1439 do { 1440 1441 CTR2(KTR_IW_CXGBE, "%s:pmr4 %p", __func__, ep); 1442 /* 1443 * If we get more than the supported amount of private data 1444 * then we must fail this connection. 1445 */ 1446 if (ep->mpa_pkt_len + m->m_len > sizeof(ep->mpa_pkt)) { 1447 1448 CTR3(KTR_IW_CXGBE, "%s:pmr5 %p %d", __func__, ep, 1449 ep->mpa_pkt_len + m->m_len); 1450 err = (-EINVAL); 1451 goto err; 1452 } 1453 1454 /* 1455 * copy the new data into our accumulation buffer. 1456 */ 1457 m_copydata(m, 0, m->m_len, &(ep->mpa_pkt[ep->mpa_pkt_len])); 1458 ep->mpa_pkt_len += m->m_len; 1459 if (!m->m_next) 1460 m = m->m_nextpkt; 1461 else 1462 m = m->m_next; 1463 } while (m); 1464 1465 m_freem(top); 1466 /* 1467 * if we don't even have the mpa message, then bail. 1468 */ 1469 if (ep->mpa_pkt_len < sizeof(*mpa)) 1470 return; 1471 mpa = (struct mpa_message *) ep->mpa_pkt; 1472 1473 /* Validate MPA header. */ 1474 if (mpa->revision > mpa_rev) { 1475 1476 CTR4(KTR_IW_CXGBE, "%s:pmr6 %p %d %d", __func__, ep, 1477 mpa->revision, mpa_rev); 1478 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d, " 1479 " Received = %d\n", __func__, mpa_rev, mpa->revision); 1480 err = -EPROTO; 1481 goto err; 1482 } 1483 1484 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { 1485 1486 CTR2(KTR_IW_CXGBE, "%s:pmr7 %p", __func__, ep); 1487 err = -EPROTO; 1488 goto err; 1489 } 1490 1491 plen = ntohs(mpa->private_data_size); 1492 1493 /* 1494 * Fail if there's too much private data. 1495 */ 1496 if (plen > MPA_MAX_PRIVATE_DATA) { 1497 1498 CTR2(KTR_IW_CXGBE, "%s:pmr8 %p", __func__, ep); 1499 err = -EPROTO; 1500 goto err; 1501 } 1502 1503 /* 1504 * If plen does not account for pkt size 1505 */ 1506 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { 1507 1508 CTR2(KTR_IW_CXGBE, "%s:pmr9 %p", __func__, ep); 1509 err = -EPROTO; 1510 goto err; 1511 } 1512 1513 ep->plen = (u8) plen; 1514 1515 /* 1516 * If we don't have all the pdata yet, then bail. 1517 * We'll continue process when more data arrives. 1518 */ 1519 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) { 1520 1521 CTR2(KTR_IW_CXGBE, "%s:pmra %p", __func__, ep); 1522 return; 1523 } 1524 1525 if (mpa->flags & MPA_REJECT) { 1526 1527 CTR2(KTR_IW_CXGBE, "%s:pmrb %p", __func__, ep); 1528 err = -ECONNREFUSED; 1529 goto err; 1530 } 1531 1532 /* 1533 * If we get here we have accumulated the entire mpa 1534 * start reply message including private data. And 1535 * the MPA header is valid. 1536 */ 1537 state_set(&ep->com, FPDU_MODE); 1538 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 1539 ep->mpa_attr.recv_marker_enabled = markers_enabled; 1540 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 1541 ep->mpa_attr.version = mpa->revision; 1542 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1543 1544 if (mpa->revision == 2) { 1545 1546 CTR2(KTR_IW_CXGBE, "%s:pmrc %p", __func__, ep); 1547 ep->mpa_attr.enhanced_rdma_conn = 1548 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; 1549 1550 if (ep->mpa_attr.enhanced_rdma_conn) { 1551 1552 CTR2(KTR_IW_CXGBE, "%s:pmrd %p", __func__, ep); 1553 mpa_v2_params = (struct mpa_v2_conn_params *) 1554 (ep->mpa_pkt + sizeof(*mpa)); 1555 resp_ird = ntohs(mpa_v2_params->ird) & 1556 MPA_V2_IRD_ORD_MASK; 1557 resp_ord = ntohs(mpa_v2_params->ord) & 1558 MPA_V2_IRD_ORD_MASK; 1559 1560 /* 1561 * This is a double-check. Ideally, below checks are 1562 * not required since ird/ord stuff has been taken 1563 * care of in c4iw_accept_cr 1564 */ 1565 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) { 1566 1567 CTR2(KTR_IW_CXGBE, "%s:pmre %p", __func__, ep); 1568 err = -ENOMEM; 1569 ep->ird = resp_ord; 1570 ep->ord = resp_ird; 1571 insuff_ird = 1; 1572 } 1573 1574 if (ntohs(mpa_v2_params->ird) & 1575 MPA_V2_PEER2PEER_MODEL) { 1576 1577 CTR2(KTR_IW_CXGBE, "%s:pmrf %p", __func__, ep); 1578 if (ntohs(mpa_v2_params->ord) & 1579 MPA_V2_RDMA_WRITE_RTR) { 1580 1581 CTR2(KTR_IW_CXGBE, "%s:pmrg %p", __func__, ep); 1582 ep->mpa_attr.p2p_type = 1583 FW_RI_INIT_P2PTYPE_RDMA_WRITE; 1584 } 1585 else if (ntohs(mpa_v2_params->ord) & 1586 MPA_V2_RDMA_READ_RTR) { 1587 1588 CTR2(KTR_IW_CXGBE, "%s:pmrh %p", __func__, ep); 1589 ep->mpa_attr.p2p_type = 1590 FW_RI_INIT_P2PTYPE_READ_REQ; 1591 } 1592 } 1593 } 1594 } else { 1595 1596 CTR2(KTR_IW_CXGBE, "%s:pmri %p", __func__, ep); 1597 1598 if (mpa->revision == 1) { 1599 1600 CTR2(KTR_IW_CXGBE, "%s:pmrj %p", __func__, ep); 1601 1602 if (peer2peer) { 1603 1604 CTR2(KTR_IW_CXGBE, "%s:pmrk %p", __func__, ep); 1605 ep->mpa_attr.p2p_type = p2p_type; 1606 } 1607 } 1608 } 1609 1610 if (set_tcpinfo(ep)) { 1611 1612 CTR2(KTR_IW_CXGBE, "%s:pmrl %p", __func__, ep); 1613 printf("%s set_tcpinfo error\n", __func__); 1614 goto err; 1615 } 1616 1617 CTR6(KTR_IW_CXGBE, "%s - crc_enabled = %d, recv_marker_enabled = %d, " 1618 "xmit_marker_enabled = %d, version = %d p2p_type = %d", __func__, 1619 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, 1620 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, 1621 ep->mpa_attr.p2p_type); 1622 1623 /* 1624 * If responder's RTR does not match with that of initiator, assign 1625 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not 1626 * generated when moving QP to RTS state. 1627 * A TERM message will be sent after QP has moved to RTS state 1628 */ 1629 if ((ep->mpa_attr.version == 2) && peer2peer && 1630 (ep->mpa_attr.p2p_type != p2p_type)) { 1631 1632 CTR2(KTR_IW_CXGBE, "%s:pmrm %p", __func__, ep); 1633 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1634 rtr_mismatch = 1; 1635 } 1636 1637 1638 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq; 1639 attrs.mpa_attr = ep->mpa_attr; 1640 attrs.max_ird = ep->ird; 1641 attrs.max_ord = ep->ord; 1642 attrs.llp_stream_handle = ep; 1643 attrs.next_state = C4IW_QP_STATE_RTS; 1644 1645 mask = C4IW_QP_ATTR_NEXT_STATE | 1646 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR | 1647 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD; 1648 1649 /* bind QP and TID with INIT_WR */ 1650 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1); 1651 1652 if (err) { 1653 1654 CTR2(KTR_IW_CXGBE, "%s:pmrn %p", __func__, ep); 1655 goto err; 1656 } 1657 1658 /* 1659 * If responder's RTR requirement did not match with what initiator 1660 * supports, generate TERM message 1661 */ 1662 if (rtr_mismatch) { 1663 1664 CTR2(KTR_IW_CXGBE, "%s:pmro %p", __func__, ep); 1665 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__); 1666 attrs.layer_etype = LAYER_MPA | DDP_LLP; 1667 attrs.ecode = MPA_NOMATCH_RTR; 1668 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1669 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1670 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); 1671 err = -ENOMEM; 1672 goto out; 1673 } 1674 1675 /* 1676 * Generate TERM if initiator IRD is not sufficient for responder 1677 * provided ORD. Currently, we do the same behaviour even when 1678 * responder provided IRD is also not sufficient as regards to 1679 * initiator ORD. 1680 */ 1681 if (insuff_ird) { 1682 1683 CTR2(KTR_IW_CXGBE, "%s:pmrp %p", __func__, ep); 1684 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n", 1685 __func__); 1686 attrs.layer_etype = LAYER_MPA | DDP_LLP; 1687 attrs.ecode = MPA_INSUFF_IRD; 1688 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1689 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1690 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); 1691 err = -ENOMEM; 1692 goto out; 1693 } 1694 goto out; 1695 err: 1696 state_set(&ep->com, ABORTING); 1697 abort_connection(ep); 1698 out: 1699 connect_reply_upcall(ep, err); 1700 CTR2(KTR_IW_CXGBE, "%s:pmrE %p", __func__, ep); 1701 return; 1702 } 1703 1704 static void 1705 process_mpa_request(struct c4iw_ep *ep) 1706 { 1707 struct mpa_message *mpa; 1708 u16 plen; 1709 int flags = MSG_DONTWAIT; 1710 int rc; 1711 struct iovec iov; 1712 struct uio uio; 1713 enum c4iw_ep_state state = state_read(&ep->com); 1714 1715 CTR3(KTR_IW_CXGBE, "%s: ep %p, state %s", __func__, ep, states[state]); 1716 1717 if (state != MPA_REQ_WAIT) 1718 return; 1719 1720 iov.iov_base = &ep->mpa_pkt[ep->mpa_pkt_len]; 1721 iov.iov_len = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len; 1722 uio.uio_iov = &iov; 1723 uio.uio_iovcnt = 1; 1724 uio.uio_offset = 0; 1725 uio.uio_resid = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len; 1726 uio.uio_segflg = UIO_SYSSPACE; 1727 uio.uio_rw = UIO_READ; 1728 uio.uio_td = NULL; /* uio.uio_td = ep->com.thread; */ 1729 1730 rc = soreceive(ep->com.so, NULL, &uio, NULL, NULL, &flags); 1731 if (rc == EAGAIN) 1732 return; 1733 else if (rc) { 1734 abort: 1735 STOP_EP_TIMER(ep); 1736 abort_connection(ep); 1737 return; 1738 } 1739 KASSERT(uio.uio_offset > 0, ("%s: sorecieve on so %p read no data", 1740 __func__, ep->com.so)); 1741 ep->mpa_pkt_len += uio.uio_offset; 1742 1743 /* 1744 * If we get more than the supported amount of private data then we must 1745 * fail this connection. XXX: check so_rcv->sb_cc, or peek with another 1746 * soreceive, or increase the size of mpa_pkt by 1 and abort if the last 1747 * byte is filled by the soreceive above. 1748 */ 1749 1750 /* Don't even have the MPA message. Wait for more data to arrive. */ 1751 if (ep->mpa_pkt_len < sizeof(*mpa)) 1752 return; 1753 mpa = (struct mpa_message *) ep->mpa_pkt; 1754 1755 /* 1756 * Validate MPA Header. 1757 */ 1758 if (mpa->revision > mpa_rev) { 1759 log(LOG_ERR, "%s: MPA version mismatch. Local = %d," 1760 " Received = %d\n", __func__, mpa_rev, mpa->revision); 1761 goto abort; 1762 } 1763 1764 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) 1765 goto abort; 1766 1767 /* 1768 * Fail if there's too much private data. 1769 */ 1770 plen = ntohs(mpa->private_data_size); 1771 if (plen > MPA_MAX_PRIVATE_DATA) 1772 goto abort; 1773 1774 /* 1775 * If plen does not account for pkt size 1776 */ 1777 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) 1778 goto abort; 1779 1780 ep->plen = (u8) plen; 1781 1782 /* 1783 * If we don't have all the pdata yet, then bail. 1784 */ 1785 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) 1786 return; 1787 1788 /* 1789 * If we get here we have accumulated the entire mpa 1790 * start reply message including private data. 1791 */ 1792 ep->mpa_attr.initiator = 0; 1793 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 1794 ep->mpa_attr.recv_marker_enabled = markers_enabled; 1795 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 1796 ep->mpa_attr.version = mpa->revision; 1797 if (mpa->revision == 1) 1798 ep->tried_with_mpa_v1 = 1; 1799 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1800 1801 if (mpa->revision == 2) { 1802 ep->mpa_attr.enhanced_rdma_conn = 1803 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; 1804 if (ep->mpa_attr.enhanced_rdma_conn) { 1805 struct mpa_v2_conn_params *mpa_v2_params; 1806 u16 ird, ord; 1807 1808 mpa_v2_params = (void *)&ep->mpa_pkt[sizeof(*mpa)]; 1809 ird = ntohs(mpa_v2_params->ird); 1810 ord = ntohs(mpa_v2_params->ord); 1811 1812 ep->ird = ird & MPA_V2_IRD_ORD_MASK; 1813 ep->ord = ord & MPA_V2_IRD_ORD_MASK; 1814 if (ird & MPA_V2_PEER2PEER_MODEL && peer2peer) { 1815 if (ord & MPA_V2_RDMA_WRITE_RTR) { 1816 ep->mpa_attr.p2p_type = 1817 FW_RI_INIT_P2PTYPE_RDMA_WRITE; 1818 } else if (ord & MPA_V2_RDMA_READ_RTR) { 1819 ep->mpa_attr.p2p_type = 1820 FW_RI_INIT_P2PTYPE_READ_REQ; 1821 } 1822 } 1823 } 1824 } else if (mpa->revision == 1 && peer2peer) 1825 ep->mpa_attr.p2p_type = p2p_type; 1826 1827 if (set_tcpinfo(ep)) 1828 goto abort; 1829 1830 CTR5(KTR_IW_CXGBE, "%s: crc_enabled = %d, recv_marker_enabled = %d, " 1831 "xmit_marker_enabled = %d, version = %d", __func__, 1832 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, 1833 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); 1834 1835 state_set(&ep->com, MPA_REQ_RCVD); 1836 STOP_EP_TIMER(ep); 1837 1838 /* drive upcall */ 1839 mutex_lock(&ep->parent_ep->com.mutex); 1840 if (ep->parent_ep->com.state != DEAD) 1841 connect_request_upcall(ep); 1842 else 1843 abort_connection(ep); 1844 mutex_unlock(&ep->parent_ep->com.mutex); 1845 } 1846 1847 /* 1848 * Upcall from the adapter indicating data has been transmitted. 1849 * For us its just the single MPA request or reply. We can now free 1850 * the skb holding the mpa message. 1851 */ 1852 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 1853 { 1854 int err; 1855 struct c4iw_ep *ep = to_ep(cm_id); 1856 CTR2(KTR_IW_CXGBE, "%s:crcB %p", __func__, ep); 1857 1858 if (state_read(&ep->com) == DEAD) { 1859 1860 CTR2(KTR_IW_CXGBE, "%s:crc1 %p", __func__, ep); 1861 c4iw_put_ep(&ep->com); 1862 return -ECONNRESET; 1863 } 1864 set_bit(ULP_REJECT, &ep->com.history); 1865 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); 1866 1867 if (mpa_rev == 0) { 1868 1869 CTR2(KTR_IW_CXGBE, "%s:crc2 %p", __func__, ep); 1870 abort_connection(ep); 1871 } 1872 else { 1873 1874 CTR2(KTR_IW_CXGBE, "%s:crc3 %p", __func__, ep); 1875 err = send_mpa_reject(ep, pdata, pdata_len); 1876 err = soshutdown(ep->com.so, 3); 1877 } 1878 c4iw_put_ep(&ep->com); 1879 CTR2(KTR_IW_CXGBE, "%s:crc4 %p", __func__, ep); 1880 return 0; 1881 } 1882 1883 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 1884 { 1885 int err; 1886 struct c4iw_qp_attributes attrs; 1887 enum c4iw_qp_attr_mask mask; 1888 struct c4iw_ep *ep = to_ep(cm_id); 1889 struct c4iw_dev *h = to_c4iw_dev(cm_id->device); 1890 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn); 1891 1892 CTR2(KTR_IW_CXGBE, "%s:cacB %p", __func__, ep); 1893 1894 if (state_read(&ep->com) == DEAD) { 1895 1896 CTR2(KTR_IW_CXGBE, "%s:cac1 %p", __func__, ep); 1897 err = -ECONNRESET; 1898 goto err; 1899 } 1900 1901 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); 1902 BUG_ON(!qp); 1903 1904 set_bit(ULP_ACCEPT, &ep->com.history); 1905 1906 if ((conn_param->ord > c4iw_max_read_depth) || 1907 (conn_param->ird > c4iw_max_read_depth)) { 1908 1909 CTR2(KTR_IW_CXGBE, "%s:cac2 %p", __func__, ep); 1910 abort_connection(ep); 1911 err = -EINVAL; 1912 goto err; 1913 } 1914 1915 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1916 1917 CTR2(KTR_IW_CXGBE, "%s:cac3 %p", __func__, ep); 1918 1919 if (conn_param->ord > ep->ird) { 1920 1921 CTR2(KTR_IW_CXGBE, "%s:cac4 %p", __func__, ep); 1922 ep->ird = conn_param->ird; 1923 ep->ord = conn_param->ord; 1924 send_mpa_reject(ep, conn_param->private_data, 1925 conn_param->private_data_len); 1926 abort_connection(ep); 1927 err = -ENOMEM; 1928 goto err; 1929 } 1930 1931 if (conn_param->ird > ep->ord) { 1932 1933 CTR2(KTR_IW_CXGBE, "%s:cac5 %p", __func__, ep); 1934 1935 if (!ep->ord) { 1936 1937 CTR2(KTR_IW_CXGBE, "%s:cac6 %p", __func__, ep); 1938 conn_param->ird = 1; 1939 } 1940 else { 1941 CTR2(KTR_IW_CXGBE, "%s:cac7 %p", __func__, ep); 1942 abort_connection(ep); 1943 err = -ENOMEM; 1944 goto err; 1945 } 1946 } 1947 1948 } 1949 ep->ird = conn_param->ird; 1950 ep->ord = conn_param->ord; 1951 1952 if (ep->mpa_attr.version != 2) { 1953 1954 CTR2(KTR_IW_CXGBE, "%s:cac8 %p", __func__, ep); 1955 1956 if (peer2peer && ep->ird == 0) { 1957 1958 CTR2(KTR_IW_CXGBE, "%s:cac9 %p", __func__, ep); 1959 ep->ird = 1; 1960 } 1961 } 1962 1963 1964 cm_id->add_ref(cm_id); 1965 ep->com.cm_id = cm_id; 1966 ep->com.qp = qp; 1967 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq; 1968 1969 /* bind QP to EP and move to RTS */ 1970 attrs.mpa_attr = ep->mpa_attr; 1971 attrs.max_ird = ep->ird; 1972 attrs.max_ord = ep->ord; 1973 attrs.llp_stream_handle = ep; 1974 attrs.next_state = C4IW_QP_STATE_RTS; 1975 1976 /* bind QP and TID with INIT_WR */ 1977 mask = C4IW_QP_ATTR_NEXT_STATE | 1978 C4IW_QP_ATTR_LLP_STREAM_HANDLE | 1979 C4IW_QP_ATTR_MPA_ATTR | 1980 C4IW_QP_ATTR_MAX_IRD | 1981 C4IW_QP_ATTR_MAX_ORD; 1982 1983 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1); 1984 1985 if (err) { 1986 1987 CTR2(KTR_IW_CXGBE, "%s:caca %p", __func__, ep); 1988 goto err1; 1989 } 1990 err = send_mpa_reply(ep, conn_param->private_data, 1991 conn_param->private_data_len); 1992 1993 if (err) { 1994 1995 CTR2(KTR_IW_CXGBE, "%s:caca %p", __func__, ep); 1996 goto err1; 1997 } 1998 1999 state_set(&ep->com, FPDU_MODE); 2000 established_upcall(ep); 2001 c4iw_put_ep(&ep->com); 2002 CTR2(KTR_IW_CXGBE, "%s:cacE %p", __func__, ep); 2003 return 0; 2004 err1: 2005 ep->com.cm_id = NULL; 2006 ep->com.qp = NULL; 2007 cm_id->rem_ref(cm_id); 2008 err: 2009 c4iw_put_ep(&ep->com); 2010 CTR2(KTR_IW_CXGBE, "%s:cacE err %p", __func__, ep); 2011 return err; 2012 } 2013 2014 2015 2016 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 2017 { 2018 int err = 0; 2019 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); 2020 struct c4iw_ep *ep = NULL; 2021 struct rtentry *rt; 2022 struct toedev *tdev; 2023 2024 CTR2(KTR_IW_CXGBE, "%s:ccB %p", __func__, cm_id); 2025 2026 if ((conn_param->ord > c4iw_max_read_depth) || 2027 (conn_param->ird > c4iw_max_read_depth)) { 2028 2029 CTR2(KTR_IW_CXGBE, "%s:cc1 %p", __func__, cm_id); 2030 err = -EINVAL; 2031 goto out; 2032 } 2033 ep = alloc_ep(sizeof(*ep), M_NOWAIT); 2034 2035 if (!ep) { 2036 2037 CTR2(KTR_IW_CXGBE, "%s:cc2 %p", __func__, cm_id); 2038 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); 2039 err = -ENOMEM; 2040 goto out; 2041 } 2042 init_timer(&ep->timer); 2043 ep->plen = conn_param->private_data_len; 2044 2045 if (ep->plen) { 2046 2047 CTR2(KTR_IW_CXGBE, "%s:cc3 %p", __func__, ep); 2048 memcpy(ep->mpa_pkt + sizeof(struct mpa_message), 2049 conn_param->private_data, ep->plen); 2050 } 2051 ep->ird = conn_param->ird; 2052 ep->ord = conn_param->ord; 2053 2054 if (peer2peer && ep->ord == 0) { 2055 2056 CTR2(KTR_IW_CXGBE, "%s:cc4 %p", __func__, ep); 2057 ep->ord = 1; 2058 } 2059 2060 cm_id->add_ref(cm_id); 2061 ep->com.dev = dev; 2062 ep->com.cm_id = cm_id; 2063 ep->com.qp = get_qhp(dev, conn_param->qpn); 2064 2065 if (!ep->com.qp) { 2066 2067 CTR2(KTR_IW_CXGBE, "%s:cc5 %p", __func__, ep); 2068 err = -EINVAL; 2069 goto fail2; 2070 } 2071 ep->com.thread = curthread; 2072 ep->com.so = cm_id->so; 2073 2074 init_sock(&ep->com); 2075 2076 /* find a route */ 2077 rt = find_route( 2078 cm_id->local_addr.sin_addr.s_addr, 2079 cm_id->remote_addr.sin_addr.s_addr, 2080 cm_id->local_addr.sin_port, 2081 cm_id->remote_addr.sin_port, 0); 2082 2083 if (!rt) { 2084 2085 CTR2(KTR_IW_CXGBE, "%s:cc7 %p", __func__, ep); 2086 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); 2087 err = -EHOSTUNREACH; 2088 goto fail2; 2089 } 2090 2091 if (!(rt->rt_ifp->if_capenable & IFCAP_TOE)) { 2092 2093 CTR2(KTR_IW_CXGBE, "%s:cc8 %p", __func__, ep); 2094 printf("%s - interface not TOE capable.\n", __func__); 2095 close_socket(&ep->com, 0); 2096 err = -ENOPROTOOPT; 2097 goto fail3; 2098 } 2099 tdev = TOEDEV(rt->rt_ifp); 2100 2101 if (tdev == NULL) { 2102 2103 CTR2(KTR_IW_CXGBE, "%s:cc9 %p", __func__, ep); 2104 printf("%s - No toedev for interface.\n", __func__); 2105 goto fail3; 2106 } 2107 RTFREE(rt); 2108 2109 state_set(&ep->com, CONNECTING); 2110 ep->tos = 0; 2111 ep->com.local_addr = cm_id->local_addr; 2112 ep->com.remote_addr = cm_id->remote_addr; 2113 err = soconnect(ep->com.so, (struct sockaddr *)&ep->com.remote_addr, 2114 ep->com.thread); 2115 2116 if (!err) { 2117 CTR2(KTR_IW_CXGBE, "%s:cca %p", __func__, ep); 2118 goto out; 2119 } else { 2120 close_socket(&ep->com, 0); 2121 goto fail2; 2122 } 2123 2124 fail3: 2125 CTR2(KTR_IW_CXGBE, "%s:ccb %p", __func__, ep); 2126 RTFREE(rt); 2127 fail2: 2128 cm_id->rem_ref(cm_id); 2129 c4iw_put_ep(&ep->com); 2130 out: 2131 CTR2(KTR_IW_CXGBE, "%s:ccE %p", __func__, ep); 2132 return err; 2133 } 2134 2135 /* 2136 * iwcm->create_listen. Returns -errno on failure. 2137 */ 2138 int 2139 c4iw_create_listen(struct iw_cm_id *cm_id, int backlog) 2140 { 2141 int rc; 2142 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); 2143 struct c4iw_listen_ep *ep; 2144 struct socket *so = cm_id->so; 2145 2146 ep = alloc_ep(sizeof(*ep), GFP_KERNEL); 2147 CTR5(KTR_IW_CXGBE, "%s: cm_id %p, lso %p, ep %p, inp %p", __func__, 2148 cm_id, so, ep, so->so_pcb); 2149 if (ep == NULL) { 2150 log(LOG_ERR, "%s: failed to alloc memory for endpoint\n", 2151 __func__); 2152 rc = ENOMEM; 2153 goto failed; 2154 } 2155 2156 cm_id->add_ref(cm_id); 2157 ep->com.cm_id = cm_id; 2158 ep->com.dev = dev; 2159 ep->backlog = backlog; 2160 ep->com.local_addr = cm_id->local_addr; 2161 ep->com.thread = curthread; 2162 state_set(&ep->com, LISTEN); 2163 ep->com.so = so; 2164 init_sock(&ep->com); 2165 2166 rc = solisten(so, ep->backlog, ep->com.thread); 2167 if (rc != 0) { 2168 log(LOG_ERR, "%s: failed to start listener: %d\n", __func__, 2169 rc); 2170 close_socket(&ep->com, 0); 2171 cm_id->rem_ref(cm_id); 2172 c4iw_put_ep(&ep->com); 2173 goto failed; 2174 } 2175 2176 cm_id->provider_data = ep; 2177 return (0); 2178 2179 failed: 2180 CTR3(KTR_IW_CXGBE, "%s: cm_id %p, FAILED (%d)", __func__, cm_id, rc); 2181 return (-rc); 2182 } 2183 2184 int 2185 c4iw_destroy_listen(struct iw_cm_id *cm_id) 2186 { 2187 int rc; 2188 struct c4iw_listen_ep *ep = to_listen_ep(cm_id); 2189 2190 CTR4(KTR_IW_CXGBE, "%s: cm_id %p, so %p, inp %p", __func__, cm_id, 2191 cm_id->so, cm_id->so->so_pcb); 2192 2193 state_set(&ep->com, DEAD); 2194 rc = close_socket(&ep->com, 0); 2195 cm_id->rem_ref(cm_id); 2196 c4iw_put_ep(&ep->com); 2197 2198 return (rc); 2199 } 2200 2201 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) 2202 { 2203 int ret = 0; 2204 int close = 0; 2205 int fatal = 0; 2206 struct c4iw_rdev *rdev; 2207 2208 mutex_lock(&ep->com.mutex); 2209 2210 CTR2(KTR_IW_CXGBE, "%s:cedB %p", __func__, ep); 2211 2212 rdev = &ep->com.dev->rdev; 2213 2214 if (c4iw_fatal_error(rdev)) { 2215 2216 CTR2(KTR_IW_CXGBE, "%s:ced1 %p", __func__, ep); 2217 fatal = 1; 2218 close_complete_upcall(ep, -EIO); 2219 ep->com.state = DEAD; 2220 } 2221 CTR3(KTR_IW_CXGBE, "%s:ced2 %p %s", __func__, ep, 2222 states[ep->com.state]); 2223 2224 switch (ep->com.state) { 2225 2226 case MPA_REQ_WAIT: 2227 case MPA_REQ_SENT: 2228 case MPA_REQ_RCVD: 2229 case MPA_REP_SENT: 2230 case FPDU_MODE: 2231 close = 1; 2232 if (abrupt) 2233 ep->com.state = ABORTING; 2234 else { 2235 ep->com.state = CLOSING; 2236 START_EP_TIMER(ep); 2237 } 2238 set_bit(CLOSE_SENT, &ep->com.flags); 2239 break; 2240 2241 case CLOSING: 2242 2243 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) { 2244 2245 close = 1; 2246 if (abrupt) { 2247 STOP_EP_TIMER(ep); 2248 ep->com.state = ABORTING; 2249 } else 2250 ep->com.state = MORIBUND; 2251 } 2252 break; 2253 2254 case MORIBUND: 2255 case ABORTING: 2256 case DEAD: 2257 CTR3(KTR_IW_CXGBE, 2258 "%s ignoring disconnect ep %p state %u", __func__, 2259 ep, ep->com.state); 2260 break; 2261 2262 default: 2263 BUG(); 2264 break; 2265 } 2266 2267 mutex_unlock(&ep->com.mutex); 2268 2269 if (close) { 2270 2271 CTR2(KTR_IW_CXGBE, "%s:ced3 %p", __func__, ep); 2272 2273 if (abrupt) { 2274 2275 CTR2(KTR_IW_CXGBE, "%s:ced4 %p", __func__, ep); 2276 set_bit(EP_DISC_ABORT, &ep->com.history); 2277 ret = abort_connection(ep); 2278 } else { 2279 2280 CTR2(KTR_IW_CXGBE, "%s:ced5 %p", __func__, ep); 2281 set_bit(EP_DISC_CLOSE, &ep->com.history); 2282 2283 if (!ep->parent_ep) 2284 __state_set(&ep->com, MORIBUND); 2285 ret = shutdown_socket(&ep->com); 2286 } 2287 2288 if (ret) { 2289 2290 fatal = 1; 2291 } 2292 } 2293 2294 if (fatal) { 2295 2296 release_ep_resources(ep); 2297 CTR2(KTR_IW_CXGBE, "%s:ced6 %p", __func__, ep); 2298 } 2299 CTR2(KTR_IW_CXGBE, "%s:cedE %p", __func__, ep); 2300 return ret; 2301 } 2302 2303 #ifdef C4IW_EP_REDIRECT 2304 int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, 2305 struct l2t_entry *l2t) 2306 { 2307 struct c4iw_ep *ep = ctx; 2308 2309 if (ep->dst != old) 2310 return 0; 2311 2312 PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new, 2313 l2t); 2314 dst_hold(new); 2315 cxgb4_l2t_release(ep->l2t); 2316 ep->l2t = l2t; 2317 dst_release(old); 2318 ep->dst = new; 2319 return 1; 2320 } 2321 #endif 2322 2323 2324 2325 static void ep_timeout(unsigned long arg) 2326 { 2327 struct c4iw_ep *ep = (struct c4iw_ep *)arg; 2328 int kickit = 0; 2329 2330 CTR2(KTR_IW_CXGBE, "%s:etB %p", __func__, ep); 2331 spin_lock(&timeout_lock); 2332 2333 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) { 2334 2335 list_add_tail(&ep->entry, &timeout_list); 2336 kickit = 1; 2337 } 2338 spin_unlock(&timeout_lock); 2339 2340 if (kickit) { 2341 2342 CTR2(KTR_IW_CXGBE, "%s:et1 %p", __func__, ep); 2343 queue_work(c4iw_taskq, &c4iw_task); 2344 } 2345 CTR2(KTR_IW_CXGBE, "%s:etE %p", __func__, ep); 2346 } 2347 2348 static int fw6_wr_rpl(struct adapter *sc, const __be64 *rpl) 2349 { 2350 uint64_t val = be64toh(*rpl); 2351 int ret; 2352 struct c4iw_wr_wait *wr_waitp; 2353 2354 ret = (int)((val >> 8) & 0xff); 2355 wr_waitp = (struct c4iw_wr_wait *)rpl[1]; 2356 CTR3(KTR_IW_CXGBE, "%s wr_waitp %p ret %u", __func__, wr_waitp, ret); 2357 if (wr_waitp) 2358 c4iw_wake_up(wr_waitp, ret ? -ret : 0); 2359 2360 return (0); 2361 } 2362 2363 static int fw6_cqe_handler(struct adapter *sc, const __be64 *rpl) 2364 { 2365 struct t4_cqe cqe =*(const struct t4_cqe *)(&rpl[0]); 2366 2367 CTR2(KTR_IW_CXGBE, "%s rpl %p", __func__, rpl); 2368 c4iw_ev_dispatch(sc->iwarp_softc, &cqe); 2369 2370 return (0); 2371 } 2372 2373 static int terminate(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 2374 { 2375 2376 struct adapter *sc = iq->adapter; 2377 2378 const struct cpl_rdma_terminate *rpl = (const void *)(rss + 1); 2379 unsigned int tid = GET_TID(rpl); 2380 struct c4iw_qp_attributes attrs; 2381 struct toepcb *toep = lookup_tid(sc, tid); 2382 struct socket *so = inp_inpcbtosocket(toep->inp); 2383 struct c4iw_ep *ep = so->so_rcv.sb_upcallarg; 2384 2385 CTR2(KTR_IW_CXGBE, "%s:tB %p %d", __func__, ep); 2386 2387 if (ep && ep->com.qp) { 2388 2389 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid, 2390 ep->com.qp->wq.sq.qid); 2391 attrs.next_state = C4IW_QP_STATE_TERMINATE; 2392 c4iw_modify_qp(ep->com.dev, ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 2393 1); 2394 } else 2395 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid); 2396 CTR2(KTR_IW_CXGBE, "%s:tE %p %d", __func__, ep); 2397 2398 return 0; 2399 } 2400 2401 void 2402 c4iw_cm_init_cpl(struct adapter *sc) 2403 { 2404 2405 t4_register_cpl_handler(sc, CPL_RDMA_TERMINATE, terminate); 2406 t4_register_fw_msg_handler(sc, FW6_TYPE_WR_RPL, fw6_wr_rpl); 2407 t4_register_fw_msg_handler(sc, FW6_TYPE_CQE, fw6_cqe_handler); 2408 t4_register_an_handler(sc, c4iw_ev_handler); 2409 } 2410 2411 void 2412 c4iw_cm_term_cpl(struct adapter *sc) 2413 { 2414 2415 t4_register_cpl_handler(sc, CPL_RDMA_TERMINATE, NULL); 2416 t4_register_fw_msg_handler(sc, FW6_TYPE_WR_RPL, NULL); 2417 t4_register_fw_msg_handler(sc, FW6_TYPE_CQE, NULL); 2418 } 2419 2420 int __init c4iw_cm_init(void) 2421 { 2422 2423 TAILQ_INIT(&req_list); 2424 spin_lock_init(&req_lock); 2425 INIT_LIST_HEAD(&timeout_list); 2426 spin_lock_init(&timeout_lock); 2427 2428 INIT_WORK(&c4iw_task, process_req); 2429 2430 c4iw_taskq = create_singlethread_workqueue("iw_cxgbe"); 2431 if (!c4iw_taskq) 2432 return -ENOMEM; 2433 2434 2435 return 0; 2436 } 2437 2438 void __exit c4iw_cm_term(void) 2439 { 2440 WARN_ON(!TAILQ_EMPTY(&req_list)); 2441 WARN_ON(!list_empty(&timeout_list)); 2442 flush_workqueue(c4iw_taskq); 2443 destroy_workqueue(c4iw_taskq); 2444 } 2445 #endif 2446