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 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT); 959 if (mpa == NULL) { 960 failed: 961 connect_reply_upcall(ep, -ENOMEM); 962 return; 963 } 964 965 memset(mpa, 0, mpalen); 966 memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); 967 mpa->flags = (crc_enabled ? MPA_CRC : 0) | 968 (markers_enabled ? MPA_MARKERS : 0) | 969 (mpa_rev_to_use == 2 ? MPA_ENHANCED_RDMA_CONN : 0); 970 mpa->private_data_size = htons(ep->plen); 971 mpa->revision = mpa_rev_to_use; 972 973 if (mpa_rev_to_use == 1) { 974 ep->tried_with_mpa_v1 = 1; 975 ep->retry_with_mpa_v1 = 0; 976 } 977 978 if (mpa_rev_to_use == 2) { 979 mpa->private_data_size += 980 htons(sizeof(struct mpa_v2_conn_params)); 981 mpa_v2_params.ird = htons((u16)ep->ird); 982 mpa_v2_params.ord = htons((u16)ep->ord); 983 984 if (peer2peer) { 985 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); 986 987 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) { 988 mpa_v2_params.ord |= 989 htons(MPA_V2_RDMA_WRITE_RTR); 990 } else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) { 991 mpa_v2_params.ord |= 992 htons(MPA_V2_RDMA_READ_RTR); 993 } 994 } 995 memcpy(mpa->private_data, &mpa_v2_params, 996 sizeof(struct mpa_v2_conn_params)); 997 998 if (ep->plen) { 999 1000 memcpy(mpa->private_data + 1001 sizeof(struct mpa_v2_conn_params), 1002 ep->mpa_pkt + sizeof(*mpa), ep->plen); 1003 } 1004 } else { 1005 1006 if (ep->plen) 1007 memcpy(mpa->private_data, 1008 ep->mpa_pkt + sizeof(*mpa), ep->plen); 1009 CTR2(KTR_IW_CXGBE, "%s:smr7 %p", __func__, ep); 1010 } 1011 1012 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA); 1013 if (m == NULL) { 1014 free(mpa, M_CXGBE); 1015 goto failed; 1016 } 1017 m_copyback(m, 0, mpalen, (void *)mpa); 1018 free(mpa, M_CXGBE); 1019 1020 err = sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT, 1021 ep->com.thread); 1022 if (err) 1023 goto failed; 1024 1025 START_EP_TIMER(ep); 1026 state_set(&ep->com, MPA_REQ_SENT); 1027 ep->mpa_attr.initiator = 1; 1028 } 1029 1030 static int send_mpa_reject(struct c4iw_ep *ep, const void *pdata, u8 plen) 1031 { 1032 int mpalen ; 1033 struct mpa_message *mpa; 1034 struct mpa_v2_conn_params mpa_v2_params; 1035 struct mbuf *m; 1036 int err; 1037 1038 CTR4(KTR_IW_CXGBE, "%s:smrejB %p %u %d", __func__, ep, ep->hwtid, 1039 ep->plen); 1040 1041 mpalen = sizeof(*mpa) + plen; 1042 1043 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1044 1045 mpalen += sizeof(struct mpa_v2_conn_params); 1046 CTR4(KTR_IW_CXGBE, "%s:smrej1 %p %u %d", __func__, ep, 1047 ep->mpa_attr.version, mpalen); 1048 } 1049 1050 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT); 1051 if (mpa == NULL) 1052 return (-ENOMEM); 1053 1054 memset(mpa, 0, mpalen); 1055 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 1056 mpa->flags = MPA_REJECT; 1057 mpa->revision = mpa_rev; 1058 mpa->private_data_size = htons(plen); 1059 1060 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1061 1062 mpa->flags |= MPA_ENHANCED_RDMA_CONN; 1063 mpa->private_data_size += 1064 htons(sizeof(struct mpa_v2_conn_params)); 1065 mpa_v2_params.ird = htons(((u16)ep->ird) | 1066 (peer2peer ? MPA_V2_PEER2PEER_MODEL : 1067 0)); 1068 mpa_v2_params.ord = htons(((u16)ep->ord) | (peer2peer ? 1069 (p2p_type == 1070 FW_RI_INIT_P2PTYPE_RDMA_WRITE ? 1071 MPA_V2_RDMA_WRITE_RTR : p2p_type == 1072 FW_RI_INIT_P2PTYPE_READ_REQ ? 1073 MPA_V2_RDMA_READ_RTR : 0) : 0)); 1074 memcpy(mpa->private_data, &mpa_v2_params, 1075 sizeof(struct mpa_v2_conn_params)); 1076 1077 if (ep->plen) 1078 memcpy(mpa->private_data + 1079 sizeof(struct mpa_v2_conn_params), pdata, plen); 1080 CTR5(KTR_IW_CXGBE, "%s:smrej3 %p %d %d %d", __func__, ep, 1081 mpa_v2_params.ird, mpa_v2_params.ord, ep->plen); 1082 } else 1083 if (plen) 1084 memcpy(mpa->private_data, pdata, plen); 1085 1086 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA); 1087 if (m == NULL) { 1088 free(mpa, M_CXGBE); 1089 return (-ENOMEM); 1090 } 1091 m_copyback(m, 0, mpalen, (void *)mpa); 1092 free(mpa, M_CXGBE); 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 mpa = malloc(mpalen, M_CXGBE, M_NOWAIT); 1121 if (mpa == NULL) 1122 return (-ENOMEM); 1123 1124 memset(mpa, 0, sizeof(*mpa)); 1125 memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); 1126 mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | 1127 (markers_enabled ? MPA_MARKERS : 0); 1128 mpa->revision = ep->mpa_attr.version; 1129 mpa->private_data_size = htons(plen); 1130 1131 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1132 1133 mpa->flags |= MPA_ENHANCED_RDMA_CONN; 1134 mpa->private_data_size += 1135 htons(sizeof(struct mpa_v2_conn_params)); 1136 mpa_v2_params.ird = htons((u16)ep->ird); 1137 mpa_v2_params.ord = htons((u16)ep->ord); 1138 CTR5(KTR_IW_CXGBE, "%s:smrep3 %p %d %d %d", __func__, ep, 1139 ep->mpa_attr.version, mpa_v2_params.ird, mpa_v2_params.ord); 1140 1141 if (peer2peer && (ep->mpa_attr.p2p_type != 1142 FW_RI_INIT_P2PTYPE_DISABLED)) { 1143 1144 mpa_v2_params.ird |= htons(MPA_V2_PEER2PEER_MODEL); 1145 1146 if (p2p_type == FW_RI_INIT_P2PTYPE_RDMA_WRITE) { 1147 1148 mpa_v2_params.ord |= 1149 htons(MPA_V2_RDMA_WRITE_RTR); 1150 CTR5(KTR_IW_CXGBE, "%s:smrep4 %p %d %d %d", 1151 __func__, ep, p2p_type, mpa_v2_params.ird, 1152 mpa_v2_params.ord); 1153 } 1154 else if (p2p_type == FW_RI_INIT_P2PTYPE_READ_REQ) { 1155 1156 mpa_v2_params.ord |= 1157 htons(MPA_V2_RDMA_READ_RTR); 1158 CTR5(KTR_IW_CXGBE, "%s:smrep5 %p %d %d %d", 1159 __func__, ep, p2p_type, mpa_v2_params.ird, 1160 mpa_v2_params.ord); 1161 } 1162 } 1163 1164 memcpy(mpa->private_data, &mpa_v2_params, 1165 sizeof(struct mpa_v2_conn_params)); 1166 1167 if (ep->plen) 1168 memcpy(mpa->private_data + 1169 sizeof(struct mpa_v2_conn_params), pdata, plen); 1170 } else 1171 if (plen) 1172 memcpy(mpa->private_data, pdata, plen); 1173 1174 m = m_getm(NULL, mpalen, M_NOWAIT, MT_DATA); 1175 if (m == NULL) { 1176 free(mpa, M_CXGBE); 1177 return (-ENOMEM); 1178 } 1179 m_copyback(m, 0, mpalen, (void *)mpa); 1180 free(mpa, M_CXGBE); 1181 1182 1183 state_set(&ep->com, MPA_REP_SENT); 1184 ep->snd_seq += mpalen; 1185 err = -sosend(ep->com.so, NULL, NULL, m, NULL, MSG_DONTWAIT, 1186 ep->com.thread); 1187 CTR3(KTR_IW_CXGBE, "%s:smrepE %p %d", __func__, ep, err); 1188 return err; 1189 } 1190 1191 1192 1193 static void close_complete_upcall(struct c4iw_ep *ep, int status) 1194 { 1195 struct iw_cm_event event; 1196 1197 CTR2(KTR_IW_CXGBE, "%s:ccuB %p", __func__, ep); 1198 memset(&event, 0, sizeof(event)); 1199 event.event = IW_CM_EVENT_CLOSE; 1200 event.status = status; 1201 1202 if (ep->com.cm_id) { 1203 1204 CTR2(KTR_IW_CXGBE, "%s:ccu1 %1", __func__, ep); 1205 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1206 ep->com.cm_id->rem_ref(ep->com.cm_id); 1207 ep->com.cm_id = NULL; 1208 ep->com.qp = NULL; 1209 set_bit(CLOSE_UPCALL, &ep->com.history); 1210 } 1211 CTR2(KTR_IW_CXGBE, "%s:ccuE %p", __func__, ep); 1212 } 1213 1214 static int abort_connection(struct c4iw_ep *ep) 1215 { 1216 int err; 1217 1218 CTR2(KTR_IW_CXGBE, "%s:abB %p", __func__, ep); 1219 close_complete_upcall(ep, -ECONNRESET); 1220 state_set(&ep->com, ABORTING); 1221 abort_socket(ep); 1222 err = close_socket(&ep->com, 0); 1223 set_bit(ABORT_CONN, &ep->com.history); 1224 CTR2(KTR_IW_CXGBE, "%s:abE %p", __func__, ep); 1225 return err; 1226 } 1227 1228 static void peer_close_upcall(struct c4iw_ep *ep) 1229 { 1230 struct iw_cm_event event; 1231 1232 CTR2(KTR_IW_CXGBE, "%s:pcuB %p", __func__, ep); 1233 memset(&event, 0, sizeof(event)); 1234 event.event = IW_CM_EVENT_DISCONNECT; 1235 1236 if (ep->com.cm_id) { 1237 1238 CTR2(KTR_IW_CXGBE, "%s:pcu1 %p", __func__, ep); 1239 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1240 set_bit(DISCONN_UPCALL, &ep->com.history); 1241 } 1242 CTR2(KTR_IW_CXGBE, "%s:pcuE %p", __func__, ep); 1243 } 1244 1245 static void peer_abort_upcall(struct c4iw_ep *ep) 1246 { 1247 struct iw_cm_event event; 1248 1249 CTR2(KTR_IW_CXGBE, "%s:pauB %p", __func__, ep); 1250 memset(&event, 0, sizeof(event)); 1251 event.event = IW_CM_EVENT_CLOSE; 1252 event.status = -ECONNRESET; 1253 1254 if (ep->com.cm_id) { 1255 1256 CTR2(KTR_IW_CXGBE, "%s:pau1 %p", __func__, ep); 1257 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1258 ep->com.cm_id->rem_ref(ep->com.cm_id); 1259 ep->com.cm_id = NULL; 1260 ep->com.qp = NULL; 1261 set_bit(ABORT_UPCALL, &ep->com.history); 1262 } 1263 CTR2(KTR_IW_CXGBE, "%s:pauE %p", __func__, ep); 1264 } 1265 1266 static void connect_reply_upcall(struct c4iw_ep *ep, int status) 1267 { 1268 struct iw_cm_event event; 1269 1270 CTR3(KTR_IW_CXGBE, "%s:cruB %p", __func__, ep, status); 1271 memset(&event, 0, sizeof(event)); 1272 event.event = IW_CM_EVENT_CONNECT_REPLY; 1273 event.status = (status ==-ECONNABORTED)?-ECONNRESET: status; 1274 event.local_addr = ep->com.local_addr; 1275 event.remote_addr = ep->com.remote_addr; 1276 1277 if ((status == 0) || (status == -ECONNREFUSED)) { 1278 1279 if (!ep->tried_with_mpa_v1) { 1280 1281 CTR2(KTR_IW_CXGBE, "%s:cru1 %p", __func__, ep); 1282 /* this means MPA_v2 is used */ 1283 event.private_data_len = ep->plen - 1284 sizeof(struct mpa_v2_conn_params); 1285 event.private_data = ep->mpa_pkt + 1286 sizeof(struct mpa_message) + 1287 sizeof(struct mpa_v2_conn_params); 1288 } else { 1289 1290 CTR2(KTR_IW_CXGBE, "%s:cru2 %p", __func__, ep); 1291 /* this means MPA_v1 is used */ 1292 event.private_data_len = ep->plen; 1293 event.private_data = ep->mpa_pkt + 1294 sizeof(struct mpa_message); 1295 } 1296 } 1297 1298 if (ep->com.cm_id) { 1299 1300 CTR2(KTR_IW_CXGBE, "%s:cru3 %p", __func__, ep); 1301 set_bit(CONN_RPL_UPCALL, &ep->com.history); 1302 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1303 } 1304 1305 if(status == -ECONNABORTED) { 1306 1307 CTR3(KTR_IW_CXGBE, "%s:cruE %p %d", __func__, ep, status); 1308 return; 1309 } 1310 1311 if (status < 0) { 1312 1313 CTR3(KTR_IW_CXGBE, "%s:cru4 %p %d", __func__, ep, status); 1314 ep->com.cm_id->rem_ref(ep->com.cm_id); 1315 ep->com.cm_id = NULL; 1316 ep->com.qp = NULL; 1317 } 1318 1319 CTR2(KTR_IW_CXGBE, "%s:cruE %p", __func__, ep); 1320 } 1321 1322 static void connect_request_upcall(struct c4iw_ep *ep) 1323 { 1324 struct iw_cm_event event; 1325 1326 CTR3(KTR_IW_CXGBE, "%s: ep %p, mpa_v1 %d", __func__, ep, 1327 ep->tried_with_mpa_v1); 1328 1329 memset(&event, 0, sizeof(event)); 1330 event.event = IW_CM_EVENT_CONNECT_REQUEST; 1331 event.local_addr = ep->com.local_addr; 1332 event.remote_addr = ep->com.remote_addr; 1333 event.provider_data = ep; 1334 event.so = ep->com.so; 1335 1336 if (!ep->tried_with_mpa_v1) { 1337 /* this means MPA_v2 is used */ 1338 #ifdef IW_CM_MPAV2 1339 event.ord = ep->ord; 1340 event.ird = ep->ird; 1341 #endif 1342 event.private_data_len = ep->plen - 1343 sizeof(struct mpa_v2_conn_params); 1344 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message) + 1345 sizeof(struct mpa_v2_conn_params); 1346 } else { 1347 1348 /* this means MPA_v1 is used. Send max supported */ 1349 #ifdef IW_CM_MPAV2 1350 event.ord = c4iw_max_read_depth; 1351 event.ird = c4iw_max_read_depth; 1352 #endif 1353 event.private_data_len = ep->plen; 1354 event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); 1355 } 1356 1357 c4iw_get_ep(&ep->com); 1358 ep->parent_ep->com.cm_id->event_handler(ep->parent_ep->com.cm_id, 1359 &event); 1360 set_bit(CONNREQ_UPCALL, &ep->com.history); 1361 c4iw_put_ep(&ep->parent_ep->com); 1362 } 1363 1364 static void established_upcall(struct c4iw_ep *ep) 1365 { 1366 struct iw_cm_event event; 1367 1368 CTR2(KTR_IW_CXGBE, "%s:euB %p", __func__, ep); 1369 memset(&event, 0, sizeof(event)); 1370 event.event = IW_CM_EVENT_ESTABLISHED; 1371 #ifdef IW_CM_MPAV2 1372 event.ird = ep->ird; 1373 event.ord = ep->ord; 1374 #endif 1375 if (ep->com.cm_id) { 1376 1377 CTR2(KTR_IW_CXGBE, "%s:eu1 %p", __func__, ep); 1378 ep->com.cm_id->event_handler(ep->com.cm_id, &event); 1379 set_bit(ESTAB_UPCALL, &ep->com.history); 1380 } 1381 CTR2(KTR_IW_CXGBE, "%s:euE %p", __func__, ep); 1382 } 1383 1384 1385 1386 static void process_mpa_reply(struct c4iw_ep *ep) 1387 { 1388 struct mpa_message *mpa; 1389 struct mpa_v2_conn_params *mpa_v2_params; 1390 u16 plen; 1391 u16 resp_ird, resp_ord; 1392 u8 rtr_mismatch = 0, insuff_ird = 0; 1393 struct c4iw_qp_attributes attrs; 1394 enum c4iw_qp_attr_mask mask; 1395 int err; 1396 struct mbuf *top, *m; 1397 int flags = MSG_DONTWAIT; 1398 struct uio uio; 1399 1400 CTR2(KTR_IW_CXGBE, "%s:pmrB %p", __func__, ep); 1401 1402 /* 1403 * Stop mpa timer. If it expired, then the state has 1404 * changed and we bail since ep_timeout already aborted 1405 * the connection. 1406 */ 1407 STOP_EP_TIMER(ep); 1408 if (state_read(&ep->com) != MPA_REQ_SENT) 1409 return; 1410 1411 uio.uio_resid = 1000000; 1412 uio.uio_td = ep->com.thread; 1413 err = soreceive(ep->com.so, NULL, &uio, &top, NULL, &flags); 1414 1415 if (err) { 1416 1417 if (err == EWOULDBLOCK) { 1418 1419 CTR2(KTR_IW_CXGBE, "%s:pmr1 %p", __func__, ep); 1420 START_EP_TIMER(ep); 1421 return; 1422 } 1423 err = -err; 1424 CTR2(KTR_IW_CXGBE, "%s:pmr2 %p", __func__, ep); 1425 goto err; 1426 } 1427 1428 if (ep->com.so->so_rcv.sb_mb) { 1429 1430 CTR2(KTR_IW_CXGBE, "%s:pmr3 %p", __func__, ep); 1431 printf("%s data after soreceive called! so %p sb_mb %p top %p\n", 1432 __func__, ep->com.so, ep->com.so->so_rcv.sb_mb, top); 1433 } 1434 1435 m = top; 1436 1437 do { 1438 1439 CTR2(KTR_IW_CXGBE, "%s:pmr4 %p", __func__, ep); 1440 /* 1441 * If we get more than the supported amount of private data 1442 * then we must fail this connection. 1443 */ 1444 if (ep->mpa_pkt_len + m->m_len > sizeof(ep->mpa_pkt)) { 1445 1446 CTR3(KTR_IW_CXGBE, "%s:pmr5 %p %d", __func__, ep, 1447 ep->mpa_pkt_len + m->m_len); 1448 err = (-EINVAL); 1449 goto err; 1450 } 1451 1452 /* 1453 * copy the new data into our accumulation buffer. 1454 */ 1455 m_copydata(m, 0, m->m_len, &(ep->mpa_pkt[ep->mpa_pkt_len])); 1456 ep->mpa_pkt_len += m->m_len; 1457 if (!m->m_next) 1458 m = m->m_nextpkt; 1459 else 1460 m = m->m_next; 1461 } while (m); 1462 1463 m_freem(top); 1464 /* 1465 * if we don't even have the mpa message, then bail. 1466 */ 1467 if (ep->mpa_pkt_len < sizeof(*mpa)) 1468 return; 1469 mpa = (struct mpa_message *) ep->mpa_pkt; 1470 1471 /* Validate MPA header. */ 1472 if (mpa->revision > mpa_rev) { 1473 1474 CTR4(KTR_IW_CXGBE, "%s:pmr6 %p %d %d", __func__, ep, 1475 mpa->revision, mpa_rev); 1476 printk(KERN_ERR MOD "%s MPA version mismatch. Local = %d, " 1477 " Received = %d\n", __func__, mpa_rev, mpa->revision); 1478 err = -EPROTO; 1479 goto err; 1480 } 1481 1482 if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { 1483 1484 CTR2(KTR_IW_CXGBE, "%s:pmr7 %p", __func__, ep); 1485 err = -EPROTO; 1486 goto err; 1487 } 1488 1489 plen = ntohs(mpa->private_data_size); 1490 1491 /* 1492 * Fail if there's too much private data. 1493 */ 1494 if (plen > MPA_MAX_PRIVATE_DATA) { 1495 1496 CTR2(KTR_IW_CXGBE, "%s:pmr8 %p", __func__, ep); 1497 err = -EPROTO; 1498 goto err; 1499 } 1500 1501 /* 1502 * If plen does not account for pkt size 1503 */ 1504 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { 1505 1506 CTR2(KTR_IW_CXGBE, "%s:pmr9 %p", __func__, ep); 1507 err = -EPROTO; 1508 goto err; 1509 } 1510 1511 ep->plen = (u8) plen; 1512 1513 /* 1514 * If we don't have all the pdata yet, then bail. 1515 * We'll continue process when more data arrives. 1516 */ 1517 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) { 1518 1519 CTR2(KTR_IW_CXGBE, "%s:pmra %p", __func__, ep); 1520 return; 1521 } 1522 1523 if (mpa->flags & MPA_REJECT) { 1524 1525 CTR2(KTR_IW_CXGBE, "%s:pmrb %p", __func__, ep); 1526 err = -ECONNREFUSED; 1527 goto err; 1528 } 1529 1530 /* 1531 * If we get here we have accumulated the entire mpa 1532 * start reply message including private data. And 1533 * the MPA header is valid. 1534 */ 1535 state_set(&ep->com, FPDU_MODE); 1536 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 1537 ep->mpa_attr.recv_marker_enabled = markers_enabled; 1538 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 1539 ep->mpa_attr.version = mpa->revision; 1540 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1541 1542 if (mpa->revision == 2) { 1543 1544 CTR2(KTR_IW_CXGBE, "%s:pmrc %p", __func__, ep); 1545 ep->mpa_attr.enhanced_rdma_conn = 1546 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; 1547 1548 if (ep->mpa_attr.enhanced_rdma_conn) { 1549 1550 CTR2(KTR_IW_CXGBE, "%s:pmrd %p", __func__, ep); 1551 mpa_v2_params = (struct mpa_v2_conn_params *) 1552 (ep->mpa_pkt + sizeof(*mpa)); 1553 resp_ird = ntohs(mpa_v2_params->ird) & 1554 MPA_V2_IRD_ORD_MASK; 1555 resp_ord = ntohs(mpa_v2_params->ord) & 1556 MPA_V2_IRD_ORD_MASK; 1557 1558 /* 1559 * This is a double-check. Ideally, below checks are 1560 * not required since ird/ord stuff has been taken 1561 * care of in c4iw_accept_cr 1562 */ 1563 if ((ep->ird < resp_ord) || (ep->ord > resp_ird)) { 1564 1565 CTR2(KTR_IW_CXGBE, "%s:pmre %p", __func__, ep); 1566 err = -ENOMEM; 1567 ep->ird = resp_ord; 1568 ep->ord = resp_ird; 1569 insuff_ird = 1; 1570 } 1571 1572 if (ntohs(mpa_v2_params->ird) & 1573 MPA_V2_PEER2PEER_MODEL) { 1574 1575 CTR2(KTR_IW_CXGBE, "%s:pmrf %p", __func__, ep); 1576 if (ntohs(mpa_v2_params->ord) & 1577 MPA_V2_RDMA_WRITE_RTR) { 1578 1579 CTR2(KTR_IW_CXGBE, "%s:pmrg %p", __func__, ep); 1580 ep->mpa_attr.p2p_type = 1581 FW_RI_INIT_P2PTYPE_RDMA_WRITE; 1582 } 1583 else if (ntohs(mpa_v2_params->ord) & 1584 MPA_V2_RDMA_READ_RTR) { 1585 1586 CTR2(KTR_IW_CXGBE, "%s:pmrh %p", __func__, ep); 1587 ep->mpa_attr.p2p_type = 1588 FW_RI_INIT_P2PTYPE_READ_REQ; 1589 } 1590 } 1591 } 1592 } else { 1593 1594 CTR2(KTR_IW_CXGBE, "%s:pmri %p", __func__, ep); 1595 1596 if (mpa->revision == 1) { 1597 1598 CTR2(KTR_IW_CXGBE, "%s:pmrj %p", __func__, ep); 1599 1600 if (peer2peer) { 1601 1602 CTR2(KTR_IW_CXGBE, "%s:pmrk %p", __func__, ep); 1603 ep->mpa_attr.p2p_type = p2p_type; 1604 } 1605 } 1606 } 1607 1608 if (set_tcpinfo(ep)) { 1609 1610 CTR2(KTR_IW_CXGBE, "%s:pmrl %p", __func__, ep); 1611 printf("%s set_tcpinfo error\n", __func__); 1612 goto err; 1613 } 1614 1615 CTR6(KTR_IW_CXGBE, "%s - crc_enabled = %d, recv_marker_enabled = %d, " 1616 "xmit_marker_enabled = %d, version = %d p2p_type = %d", __func__, 1617 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, 1618 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version, 1619 ep->mpa_attr.p2p_type); 1620 1621 /* 1622 * If responder's RTR does not match with that of initiator, assign 1623 * FW_RI_INIT_P2PTYPE_DISABLED in mpa attributes so that RTR is not 1624 * generated when moving QP to RTS state. 1625 * A TERM message will be sent after QP has moved to RTS state 1626 */ 1627 if ((ep->mpa_attr.version == 2) && peer2peer && 1628 (ep->mpa_attr.p2p_type != p2p_type)) { 1629 1630 CTR2(KTR_IW_CXGBE, "%s:pmrm %p", __func__, ep); 1631 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1632 rtr_mismatch = 1; 1633 } 1634 1635 1636 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq; 1637 attrs.mpa_attr = ep->mpa_attr; 1638 attrs.max_ird = ep->ird; 1639 attrs.max_ord = ep->ord; 1640 attrs.llp_stream_handle = ep; 1641 attrs.next_state = C4IW_QP_STATE_RTS; 1642 1643 mask = C4IW_QP_ATTR_NEXT_STATE | 1644 C4IW_QP_ATTR_LLP_STREAM_HANDLE | C4IW_QP_ATTR_MPA_ATTR | 1645 C4IW_QP_ATTR_MAX_IRD | C4IW_QP_ATTR_MAX_ORD; 1646 1647 /* bind QP and TID with INIT_WR */ 1648 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1); 1649 1650 if (err) { 1651 1652 CTR2(KTR_IW_CXGBE, "%s:pmrn %p", __func__, ep); 1653 goto err; 1654 } 1655 1656 /* 1657 * If responder's RTR requirement did not match with what initiator 1658 * supports, generate TERM message 1659 */ 1660 if (rtr_mismatch) { 1661 1662 CTR2(KTR_IW_CXGBE, "%s:pmro %p", __func__, ep); 1663 printk(KERN_ERR "%s: RTR mismatch, sending TERM\n", __func__); 1664 attrs.layer_etype = LAYER_MPA | DDP_LLP; 1665 attrs.ecode = MPA_NOMATCH_RTR; 1666 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1667 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1668 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); 1669 err = -ENOMEM; 1670 goto out; 1671 } 1672 1673 /* 1674 * Generate TERM if initiator IRD is not sufficient for responder 1675 * provided ORD. Currently, we do the same behaviour even when 1676 * responder provided IRD is also not sufficient as regards to 1677 * initiator ORD. 1678 */ 1679 if (insuff_ird) { 1680 1681 CTR2(KTR_IW_CXGBE, "%s:pmrp %p", __func__, ep); 1682 printk(KERN_ERR "%s: Insufficient IRD, sending TERM\n", 1683 __func__); 1684 attrs.layer_etype = LAYER_MPA | DDP_LLP; 1685 attrs.ecode = MPA_INSUFF_IRD; 1686 attrs.next_state = C4IW_QP_STATE_TERMINATE; 1687 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, 1688 C4IW_QP_ATTR_NEXT_STATE, &attrs, 0); 1689 err = -ENOMEM; 1690 goto out; 1691 } 1692 goto out; 1693 err: 1694 state_set(&ep->com, ABORTING); 1695 abort_connection(ep); 1696 out: 1697 connect_reply_upcall(ep, err); 1698 CTR2(KTR_IW_CXGBE, "%s:pmrE %p", __func__, ep); 1699 return; 1700 } 1701 1702 static void 1703 process_mpa_request(struct c4iw_ep *ep) 1704 { 1705 struct mpa_message *mpa; 1706 u16 plen; 1707 int flags = MSG_DONTWAIT; 1708 int rc; 1709 struct iovec iov; 1710 struct uio uio; 1711 enum c4iw_ep_state state = state_read(&ep->com); 1712 1713 CTR3(KTR_IW_CXGBE, "%s: ep %p, state %s", __func__, ep, states[state]); 1714 1715 if (state != MPA_REQ_WAIT) 1716 return; 1717 1718 iov.iov_base = &ep->mpa_pkt[ep->mpa_pkt_len]; 1719 iov.iov_len = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len; 1720 uio.uio_iov = &iov; 1721 uio.uio_iovcnt = 1; 1722 uio.uio_offset = 0; 1723 uio.uio_resid = sizeof(ep->mpa_pkt) - ep->mpa_pkt_len; 1724 uio.uio_segflg = UIO_SYSSPACE; 1725 uio.uio_rw = UIO_READ; 1726 uio.uio_td = NULL; /* uio.uio_td = ep->com.thread; */ 1727 1728 rc = soreceive(ep->com.so, NULL, &uio, NULL, NULL, &flags); 1729 if (rc == EAGAIN) 1730 return; 1731 else if (rc) { 1732 abort: 1733 STOP_EP_TIMER(ep); 1734 abort_connection(ep); 1735 return; 1736 } 1737 KASSERT(uio.uio_offset > 0, ("%s: sorecieve on so %p read no data", 1738 __func__, ep->com.so)); 1739 ep->mpa_pkt_len += uio.uio_offset; 1740 1741 /* 1742 * If we get more than the supported amount of private data then we must 1743 * fail this connection. XXX: check so_rcv->sb_cc, or peek with another 1744 * soreceive, or increase the size of mpa_pkt by 1 and abort if the last 1745 * byte is filled by the soreceive above. 1746 */ 1747 1748 /* Don't even have the MPA message. Wait for more data to arrive. */ 1749 if (ep->mpa_pkt_len < sizeof(*mpa)) 1750 return; 1751 mpa = (struct mpa_message *) ep->mpa_pkt; 1752 1753 /* 1754 * Validate MPA Header. 1755 */ 1756 if (mpa->revision > mpa_rev) { 1757 log(LOG_ERR, "%s: MPA version mismatch. Local = %d," 1758 " Received = %d\n", __func__, mpa_rev, mpa->revision); 1759 goto abort; 1760 } 1761 1762 if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) 1763 goto abort; 1764 1765 /* 1766 * Fail if there's too much private data. 1767 */ 1768 plen = ntohs(mpa->private_data_size); 1769 if (plen > MPA_MAX_PRIVATE_DATA) 1770 goto abort; 1771 1772 /* 1773 * If plen does not account for pkt size 1774 */ 1775 if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) 1776 goto abort; 1777 1778 ep->plen = (u8) plen; 1779 1780 /* 1781 * If we don't have all the pdata yet, then bail. 1782 */ 1783 if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) 1784 return; 1785 1786 /* 1787 * If we get here we have accumulated the entire mpa 1788 * start reply message including private data. 1789 */ 1790 ep->mpa_attr.initiator = 0; 1791 ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; 1792 ep->mpa_attr.recv_marker_enabled = markers_enabled; 1793 ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; 1794 ep->mpa_attr.version = mpa->revision; 1795 if (mpa->revision == 1) 1796 ep->tried_with_mpa_v1 = 1; 1797 ep->mpa_attr.p2p_type = FW_RI_INIT_P2PTYPE_DISABLED; 1798 1799 if (mpa->revision == 2) { 1800 ep->mpa_attr.enhanced_rdma_conn = 1801 mpa->flags & MPA_ENHANCED_RDMA_CONN ? 1 : 0; 1802 if (ep->mpa_attr.enhanced_rdma_conn) { 1803 struct mpa_v2_conn_params *mpa_v2_params; 1804 u16 ird, ord; 1805 1806 mpa_v2_params = (void *)&ep->mpa_pkt[sizeof(*mpa)]; 1807 ird = ntohs(mpa_v2_params->ird); 1808 ord = ntohs(mpa_v2_params->ord); 1809 1810 ep->ird = ird & MPA_V2_IRD_ORD_MASK; 1811 ep->ord = ord & MPA_V2_IRD_ORD_MASK; 1812 if (ird & MPA_V2_PEER2PEER_MODEL && peer2peer) { 1813 if (ord & MPA_V2_RDMA_WRITE_RTR) { 1814 ep->mpa_attr.p2p_type = 1815 FW_RI_INIT_P2PTYPE_RDMA_WRITE; 1816 } else if (ord & MPA_V2_RDMA_READ_RTR) { 1817 ep->mpa_attr.p2p_type = 1818 FW_RI_INIT_P2PTYPE_READ_REQ; 1819 } 1820 } 1821 } 1822 } else if (mpa->revision == 1 && peer2peer) 1823 ep->mpa_attr.p2p_type = p2p_type; 1824 1825 if (set_tcpinfo(ep)) 1826 goto abort; 1827 1828 CTR5(KTR_IW_CXGBE, "%s: crc_enabled = %d, recv_marker_enabled = %d, " 1829 "xmit_marker_enabled = %d, version = %d", __func__, 1830 ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, 1831 ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); 1832 1833 state_set(&ep->com, MPA_REQ_RCVD); 1834 STOP_EP_TIMER(ep); 1835 1836 /* drive upcall */ 1837 mutex_lock(&ep->parent_ep->com.mutex); 1838 if (ep->parent_ep->com.state != DEAD) 1839 connect_request_upcall(ep); 1840 else 1841 abort_connection(ep); 1842 mutex_unlock(&ep->parent_ep->com.mutex); 1843 } 1844 1845 /* 1846 * Upcall from the adapter indicating data has been transmitted. 1847 * For us its just the single MPA request or reply. We can now free 1848 * the skb holding the mpa message. 1849 */ 1850 int c4iw_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) 1851 { 1852 int err; 1853 struct c4iw_ep *ep = to_ep(cm_id); 1854 CTR2(KTR_IW_CXGBE, "%s:crcB %p", __func__, ep); 1855 1856 if (state_read(&ep->com) == DEAD) { 1857 1858 CTR2(KTR_IW_CXGBE, "%s:crc1 %p", __func__, ep); 1859 c4iw_put_ep(&ep->com); 1860 return -ECONNRESET; 1861 } 1862 set_bit(ULP_REJECT, &ep->com.history); 1863 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); 1864 1865 if (mpa_rev == 0) { 1866 1867 CTR2(KTR_IW_CXGBE, "%s:crc2 %p", __func__, ep); 1868 abort_connection(ep); 1869 } 1870 else { 1871 1872 CTR2(KTR_IW_CXGBE, "%s:crc3 %p", __func__, ep); 1873 err = send_mpa_reject(ep, pdata, pdata_len); 1874 err = soshutdown(ep->com.so, 3); 1875 } 1876 c4iw_put_ep(&ep->com); 1877 CTR2(KTR_IW_CXGBE, "%s:crc4 %p", __func__, ep); 1878 return 0; 1879 } 1880 1881 int c4iw_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 1882 { 1883 int err; 1884 struct c4iw_qp_attributes attrs; 1885 enum c4iw_qp_attr_mask mask; 1886 struct c4iw_ep *ep = to_ep(cm_id); 1887 struct c4iw_dev *h = to_c4iw_dev(cm_id->device); 1888 struct c4iw_qp *qp = get_qhp(h, conn_param->qpn); 1889 1890 CTR2(KTR_IW_CXGBE, "%s:cacB %p", __func__, ep); 1891 1892 if (state_read(&ep->com) == DEAD) { 1893 1894 CTR2(KTR_IW_CXGBE, "%s:cac1 %p", __func__, ep); 1895 err = -ECONNRESET; 1896 goto err; 1897 } 1898 1899 BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); 1900 BUG_ON(!qp); 1901 1902 set_bit(ULP_ACCEPT, &ep->com.history); 1903 1904 if ((conn_param->ord > c4iw_max_read_depth) || 1905 (conn_param->ird > c4iw_max_read_depth)) { 1906 1907 CTR2(KTR_IW_CXGBE, "%s:cac2 %p", __func__, ep); 1908 abort_connection(ep); 1909 err = -EINVAL; 1910 goto err; 1911 } 1912 1913 if (ep->mpa_attr.version == 2 && ep->mpa_attr.enhanced_rdma_conn) { 1914 1915 CTR2(KTR_IW_CXGBE, "%s:cac3 %p", __func__, ep); 1916 1917 if (conn_param->ord > ep->ird) { 1918 1919 CTR2(KTR_IW_CXGBE, "%s:cac4 %p", __func__, ep); 1920 ep->ird = conn_param->ird; 1921 ep->ord = conn_param->ord; 1922 send_mpa_reject(ep, conn_param->private_data, 1923 conn_param->private_data_len); 1924 abort_connection(ep); 1925 err = -ENOMEM; 1926 goto err; 1927 } 1928 1929 if (conn_param->ird > ep->ord) { 1930 1931 CTR2(KTR_IW_CXGBE, "%s:cac5 %p", __func__, ep); 1932 1933 if (!ep->ord) { 1934 1935 CTR2(KTR_IW_CXGBE, "%s:cac6 %p", __func__, ep); 1936 conn_param->ird = 1; 1937 } 1938 else { 1939 CTR2(KTR_IW_CXGBE, "%s:cac7 %p", __func__, ep); 1940 abort_connection(ep); 1941 err = -ENOMEM; 1942 goto err; 1943 } 1944 } 1945 1946 } 1947 ep->ird = conn_param->ird; 1948 ep->ord = conn_param->ord; 1949 1950 if (ep->mpa_attr.version != 2) { 1951 1952 CTR2(KTR_IW_CXGBE, "%s:cac8 %p", __func__, ep); 1953 1954 if (peer2peer && ep->ird == 0) { 1955 1956 CTR2(KTR_IW_CXGBE, "%s:cac9 %p", __func__, ep); 1957 ep->ird = 1; 1958 } 1959 } 1960 1961 1962 cm_id->add_ref(cm_id); 1963 ep->com.cm_id = cm_id; 1964 ep->com.qp = qp; 1965 //ep->ofld_txq = TOEPCB(ep->com.so)->ofld_txq; 1966 1967 /* bind QP to EP and move to RTS */ 1968 attrs.mpa_attr = ep->mpa_attr; 1969 attrs.max_ird = ep->ird; 1970 attrs.max_ord = ep->ord; 1971 attrs.llp_stream_handle = ep; 1972 attrs.next_state = C4IW_QP_STATE_RTS; 1973 1974 /* bind QP and TID with INIT_WR */ 1975 mask = C4IW_QP_ATTR_NEXT_STATE | 1976 C4IW_QP_ATTR_LLP_STREAM_HANDLE | 1977 C4IW_QP_ATTR_MPA_ATTR | 1978 C4IW_QP_ATTR_MAX_IRD | 1979 C4IW_QP_ATTR_MAX_ORD; 1980 1981 err = c4iw_modify_qp(ep->com.qp->rhp, ep->com.qp, mask, &attrs, 1); 1982 1983 if (err) { 1984 1985 CTR2(KTR_IW_CXGBE, "%s:caca %p", __func__, ep); 1986 goto err1; 1987 } 1988 err = send_mpa_reply(ep, conn_param->private_data, 1989 conn_param->private_data_len); 1990 1991 if (err) { 1992 1993 CTR2(KTR_IW_CXGBE, "%s:caca %p", __func__, ep); 1994 goto err1; 1995 } 1996 1997 state_set(&ep->com, FPDU_MODE); 1998 established_upcall(ep); 1999 c4iw_put_ep(&ep->com); 2000 CTR2(KTR_IW_CXGBE, "%s:cacE %p", __func__, ep); 2001 return 0; 2002 err1: 2003 ep->com.cm_id = NULL; 2004 ep->com.qp = NULL; 2005 cm_id->rem_ref(cm_id); 2006 err: 2007 c4iw_put_ep(&ep->com); 2008 CTR2(KTR_IW_CXGBE, "%s:cacE err %p", __func__, ep); 2009 return err; 2010 } 2011 2012 2013 2014 int c4iw_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) 2015 { 2016 int err = 0; 2017 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); 2018 struct c4iw_ep *ep = NULL; 2019 struct rtentry *rt; 2020 struct toedev *tdev; 2021 2022 CTR2(KTR_IW_CXGBE, "%s:ccB %p", __func__, cm_id); 2023 2024 if ((conn_param->ord > c4iw_max_read_depth) || 2025 (conn_param->ird > c4iw_max_read_depth)) { 2026 2027 CTR2(KTR_IW_CXGBE, "%s:cc1 %p", __func__, cm_id); 2028 err = -EINVAL; 2029 goto out; 2030 } 2031 ep = alloc_ep(sizeof(*ep), M_NOWAIT); 2032 2033 if (!ep) { 2034 2035 CTR2(KTR_IW_CXGBE, "%s:cc2 %p", __func__, cm_id); 2036 printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); 2037 err = -ENOMEM; 2038 goto out; 2039 } 2040 init_timer(&ep->timer); 2041 ep->plen = conn_param->private_data_len; 2042 2043 if (ep->plen) { 2044 2045 CTR2(KTR_IW_CXGBE, "%s:cc3 %p", __func__, ep); 2046 memcpy(ep->mpa_pkt + sizeof(struct mpa_message), 2047 conn_param->private_data, ep->plen); 2048 } 2049 ep->ird = conn_param->ird; 2050 ep->ord = conn_param->ord; 2051 2052 if (peer2peer && ep->ord == 0) { 2053 2054 CTR2(KTR_IW_CXGBE, "%s:cc4 %p", __func__, ep); 2055 ep->ord = 1; 2056 } 2057 2058 cm_id->add_ref(cm_id); 2059 ep->com.dev = dev; 2060 ep->com.cm_id = cm_id; 2061 ep->com.qp = get_qhp(dev, conn_param->qpn); 2062 2063 if (!ep->com.qp) { 2064 2065 CTR2(KTR_IW_CXGBE, "%s:cc5 %p", __func__, ep); 2066 err = -EINVAL; 2067 goto fail2; 2068 } 2069 ep->com.thread = curthread; 2070 ep->com.so = cm_id->so; 2071 2072 init_sock(&ep->com); 2073 2074 /* find a route */ 2075 rt = find_route( 2076 cm_id->local_addr.sin_addr.s_addr, 2077 cm_id->remote_addr.sin_addr.s_addr, 2078 cm_id->local_addr.sin_port, 2079 cm_id->remote_addr.sin_port, 0); 2080 2081 if (!rt) { 2082 2083 CTR2(KTR_IW_CXGBE, "%s:cc7 %p", __func__, ep); 2084 printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); 2085 err = -EHOSTUNREACH; 2086 goto fail2; 2087 } 2088 2089 if (!(rt->rt_ifp->if_capenable & IFCAP_TOE)) { 2090 2091 CTR2(KTR_IW_CXGBE, "%s:cc8 %p", __func__, ep); 2092 printf("%s - interface not TOE capable.\n", __func__); 2093 close_socket(&ep->com, 0); 2094 err = -ENOPROTOOPT; 2095 goto fail3; 2096 } 2097 tdev = TOEDEV(rt->rt_ifp); 2098 2099 if (tdev == NULL) { 2100 2101 CTR2(KTR_IW_CXGBE, "%s:cc9 %p", __func__, ep); 2102 printf("%s - No toedev for interface.\n", __func__); 2103 goto fail3; 2104 } 2105 RTFREE(rt); 2106 2107 state_set(&ep->com, CONNECTING); 2108 ep->tos = 0; 2109 ep->com.local_addr = cm_id->local_addr; 2110 ep->com.remote_addr = cm_id->remote_addr; 2111 err = soconnect(ep->com.so, (struct sockaddr *)&ep->com.remote_addr, 2112 ep->com.thread); 2113 2114 if (!err) { 2115 CTR2(KTR_IW_CXGBE, "%s:cca %p", __func__, ep); 2116 goto out; 2117 } else { 2118 close_socket(&ep->com, 0); 2119 goto fail2; 2120 } 2121 2122 fail3: 2123 CTR2(KTR_IW_CXGBE, "%s:ccb %p", __func__, ep); 2124 RTFREE(rt); 2125 fail2: 2126 cm_id->rem_ref(cm_id); 2127 c4iw_put_ep(&ep->com); 2128 out: 2129 CTR2(KTR_IW_CXGBE, "%s:ccE %p", __func__, ep); 2130 return err; 2131 } 2132 2133 /* 2134 * iwcm->create_listen. Returns -errno on failure. 2135 */ 2136 int 2137 c4iw_create_listen(struct iw_cm_id *cm_id, int backlog) 2138 { 2139 int rc; 2140 struct c4iw_dev *dev = to_c4iw_dev(cm_id->device); 2141 struct c4iw_listen_ep *ep; 2142 struct socket *so = cm_id->so; 2143 2144 ep = alloc_ep(sizeof(*ep), GFP_KERNEL); 2145 CTR5(KTR_IW_CXGBE, "%s: cm_id %p, lso %p, ep %p, inp %p", __func__, 2146 cm_id, so, ep, so->so_pcb); 2147 if (ep == NULL) { 2148 log(LOG_ERR, "%s: failed to alloc memory for endpoint\n", 2149 __func__); 2150 rc = ENOMEM; 2151 goto failed; 2152 } 2153 2154 cm_id->add_ref(cm_id); 2155 ep->com.cm_id = cm_id; 2156 ep->com.dev = dev; 2157 ep->backlog = backlog; 2158 ep->com.local_addr = cm_id->local_addr; 2159 ep->com.thread = curthread; 2160 state_set(&ep->com, LISTEN); 2161 ep->com.so = so; 2162 init_sock(&ep->com); 2163 2164 rc = solisten(so, ep->backlog, ep->com.thread); 2165 if (rc != 0) { 2166 log(LOG_ERR, "%s: failed to start listener: %d\n", __func__, 2167 rc); 2168 close_socket(&ep->com, 0); 2169 cm_id->rem_ref(cm_id); 2170 c4iw_put_ep(&ep->com); 2171 goto failed; 2172 } 2173 2174 cm_id->provider_data = ep; 2175 return (0); 2176 2177 failed: 2178 CTR3(KTR_IW_CXGBE, "%s: cm_id %p, FAILED (%d)", __func__, cm_id, rc); 2179 return (-rc); 2180 } 2181 2182 int 2183 c4iw_destroy_listen(struct iw_cm_id *cm_id) 2184 { 2185 int rc; 2186 struct c4iw_listen_ep *ep = to_listen_ep(cm_id); 2187 2188 CTR4(KTR_IW_CXGBE, "%s: cm_id %p, so %p, inp %p", __func__, cm_id, 2189 cm_id->so, cm_id->so->so_pcb); 2190 2191 state_set(&ep->com, DEAD); 2192 rc = close_socket(&ep->com, 0); 2193 cm_id->rem_ref(cm_id); 2194 c4iw_put_ep(&ep->com); 2195 2196 return (rc); 2197 } 2198 2199 int c4iw_ep_disconnect(struct c4iw_ep *ep, int abrupt, gfp_t gfp) 2200 { 2201 int ret = 0; 2202 int close = 0; 2203 int fatal = 0; 2204 struct c4iw_rdev *rdev; 2205 2206 mutex_lock(&ep->com.mutex); 2207 2208 CTR2(KTR_IW_CXGBE, "%s:cedB %p", __func__, ep); 2209 2210 rdev = &ep->com.dev->rdev; 2211 2212 if (c4iw_fatal_error(rdev)) { 2213 2214 CTR2(KTR_IW_CXGBE, "%s:ced1 %p", __func__, ep); 2215 fatal = 1; 2216 close_complete_upcall(ep, -EIO); 2217 ep->com.state = DEAD; 2218 } 2219 CTR3(KTR_IW_CXGBE, "%s:ced2 %p %s", __func__, ep, 2220 states[ep->com.state]); 2221 2222 switch (ep->com.state) { 2223 2224 case MPA_REQ_WAIT: 2225 case MPA_REQ_SENT: 2226 case MPA_REQ_RCVD: 2227 case MPA_REP_SENT: 2228 case FPDU_MODE: 2229 close = 1; 2230 if (abrupt) 2231 ep->com.state = ABORTING; 2232 else { 2233 ep->com.state = CLOSING; 2234 START_EP_TIMER(ep); 2235 } 2236 set_bit(CLOSE_SENT, &ep->com.flags); 2237 break; 2238 2239 case CLOSING: 2240 2241 if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) { 2242 2243 close = 1; 2244 if (abrupt) { 2245 STOP_EP_TIMER(ep); 2246 ep->com.state = ABORTING; 2247 } else 2248 ep->com.state = MORIBUND; 2249 } 2250 break; 2251 2252 case MORIBUND: 2253 case ABORTING: 2254 case DEAD: 2255 CTR3(KTR_IW_CXGBE, 2256 "%s ignoring disconnect ep %p state %u", __func__, 2257 ep, ep->com.state); 2258 break; 2259 2260 default: 2261 BUG(); 2262 break; 2263 } 2264 2265 mutex_unlock(&ep->com.mutex); 2266 2267 if (close) { 2268 2269 CTR2(KTR_IW_CXGBE, "%s:ced3 %p", __func__, ep); 2270 2271 if (abrupt) { 2272 2273 CTR2(KTR_IW_CXGBE, "%s:ced4 %p", __func__, ep); 2274 set_bit(EP_DISC_ABORT, &ep->com.history); 2275 ret = abort_connection(ep); 2276 } else { 2277 2278 CTR2(KTR_IW_CXGBE, "%s:ced5 %p", __func__, ep); 2279 set_bit(EP_DISC_CLOSE, &ep->com.history); 2280 2281 if (!ep->parent_ep) 2282 __state_set(&ep->com, MORIBUND); 2283 ret = shutdown_socket(&ep->com); 2284 } 2285 2286 if (ret) { 2287 2288 fatal = 1; 2289 } 2290 } 2291 2292 if (fatal) { 2293 2294 release_ep_resources(ep); 2295 CTR2(KTR_IW_CXGBE, "%s:ced6 %p", __func__, ep); 2296 } 2297 CTR2(KTR_IW_CXGBE, "%s:cedE %p", __func__, ep); 2298 return ret; 2299 } 2300 2301 #ifdef C4IW_EP_REDIRECT 2302 int c4iw_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, 2303 struct l2t_entry *l2t) 2304 { 2305 struct c4iw_ep *ep = ctx; 2306 2307 if (ep->dst != old) 2308 return 0; 2309 2310 PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new, 2311 l2t); 2312 dst_hold(new); 2313 cxgb4_l2t_release(ep->l2t); 2314 ep->l2t = l2t; 2315 dst_release(old); 2316 ep->dst = new; 2317 return 1; 2318 } 2319 #endif 2320 2321 2322 2323 static void ep_timeout(unsigned long arg) 2324 { 2325 struct c4iw_ep *ep = (struct c4iw_ep *)arg; 2326 int kickit = 0; 2327 2328 CTR2(KTR_IW_CXGBE, "%s:etB %p", __func__, ep); 2329 spin_lock(&timeout_lock); 2330 2331 if (!test_and_set_bit(TIMEOUT, &ep->com.flags)) { 2332 2333 list_add_tail(&ep->entry, &timeout_list); 2334 kickit = 1; 2335 } 2336 spin_unlock(&timeout_lock); 2337 2338 if (kickit) { 2339 2340 CTR2(KTR_IW_CXGBE, "%s:et1 %p", __func__, ep); 2341 queue_work(c4iw_taskq, &c4iw_task); 2342 } 2343 CTR2(KTR_IW_CXGBE, "%s:etE %p", __func__, ep); 2344 } 2345 2346 static int fw6_wr_rpl(struct adapter *sc, const __be64 *rpl) 2347 { 2348 uint64_t val = be64toh(*rpl); 2349 int ret; 2350 struct c4iw_wr_wait *wr_waitp; 2351 2352 ret = (int)((val >> 8) & 0xff); 2353 wr_waitp = (struct c4iw_wr_wait *)rpl[1]; 2354 CTR3(KTR_IW_CXGBE, "%s wr_waitp %p ret %u", __func__, wr_waitp, ret); 2355 if (wr_waitp) 2356 c4iw_wake_up(wr_waitp, ret ? -ret : 0); 2357 2358 return (0); 2359 } 2360 2361 static int fw6_cqe_handler(struct adapter *sc, const __be64 *rpl) 2362 { 2363 struct t4_cqe cqe =*(const struct t4_cqe *)(&rpl[0]); 2364 2365 CTR2(KTR_IW_CXGBE, "%s rpl %p", __func__, rpl); 2366 c4iw_ev_dispatch(sc->iwarp_softc, &cqe); 2367 2368 return (0); 2369 } 2370 2371 static int terminate(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 2372 { 2373 2374 struct adapter *sc = iq->adapter; 2375 2376 const struct cpl_rdma_terminate *rpl = (const void *)(rss + 1); 2377 unsigned int tid = GET_TID(rpl); 2378 struct c4iw_qp_attributes attrs; 2379 struct toepcb *toep = lookup_tid(sc, tid); 2380 struct socket *so = inp_inpcbtosocket(toep->inp); 2381 struct c4iw_ep *ep = so->so_rcv.sb_upcallarg; 2382 2383 CTR2(KTR_IW_CXGBE, "%s:tB %p %d", __func__, ep); 2384 2385 if (ep && ep->com.qp) { 2386 2387 printk(KERN_WARNING MOD "TERM received tid %u qpid %u\n", tid, 2388 ep->com.qp->wq.sq.qid); 2389 attrs.next_state = C4IW_QP_STATE_TERMINATE; 2390 c4iw_modify_qp(ep->com.dev, ep->com.qp, C4IW_QP_ATTR_NEXT_STATE, &attrs, 2391 1); 2392 } else 2393 printk(KERN_WARNING MOD "TERM received tid %u no ep/qp\n", tid); 2394 CTR2(KTR_IW_CXGBE, "%s:tE %p %d", __func__, ep); 2395 2396 return 0; 2397 } 2398 2399 void 2400 c4iw_cm_init_cpl(struct adapter *sc) 2401 { 2402 2403 t4_register_cpl_handler(sc, CPL_RDMA_TERMINATE, terminate); 2404 t4_register_fw_msg_handler(sc, FW6_TYPE_WR_RPL, fw6_wr_rpl); 2405 t4_register_fw_msg_handler(sc, FW6_TYPE_CQE, fw6_cqe_handler); 2406 t4_register_an_handler(sc, c4iw_ev_handler); 2407 } 2408 2409 void 2410 c4iw_cm_term_cpl(struct adapter *sc) 2411 { 2412 2413 t4_register_cpl_handler(sc, CPL_RDMA_TERMINATE, NULL); 2414 t4_register_fw_msg_handler(sc, FW6_TYPE_WR_RPL, NULL); 2415 t4_register_fw_msg_handler(sc, FW6_TYPE_CQE, NULL); 2416 } 2417 2418 int __init c4iw_cm_init(void) 2419 { 2420 2421 TAILQ_INIT(&req_list); 2422 spin_lock_init(&req_lock); 2423 INIT_LIST_HEAD(&timeout_list); 2424 spin_lock_init(&timeout_lock); 2425 2426 INIT_WORK(&c4iw_task, process_req); 2427 2428 c4iw_taskq = create_singlethread_workqueue("iw_cxgbe"); 2429 if (!c4iw_taskq) 2430 return -ENOMEM; 2431 2432 2433 return 0; 2434 } 2435 2436 void __exit c4iw_cm_term(void) 2437 { 2438 WARN_ON(!TAILQ_EMPTY(&req_list)); 2439 WARN_ON(!list_empty(&timeout_list)); 2440 flush_workqueue(c4iw_taskq); 2441 destroy_workqueue(c4iw_taskq); 2442 } 2443 #endif 2444