1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004 Topspin Communications. All rights reserved. 5 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 6 * Copyright (c) 2004 Voltaire, Inc. All rights reserved. 7 * 8 * This software is available to you under a choice of one of two 9 * licenses. You may choose to be licensed under the terms of the GNU 10 * General Public License (GPL) Version 2, available from the file 11 * COPYING in the main directory of this source tree, or the 12 * OpenIB.org BSD license below: 13 * 14 * Redistribution and use in source and binary forms, with or 15 * without modification, are permitted provided that the following 16 * conditions are met: 17 * 18 * - Redistributions of source code must retain the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer. 21 * 22 * - Redistributions in binary form must reproduce the above 23 * copyright notice, this list of conditions and the following 24 * disclaimer in the documentation and/or other materials 25 * provided with the distribution. 26 * 27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 34 * SOFTWARE. 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include "ipoib.h" 41 #include <sys/eventhandler.h> 42 43 #include <linux/module.h> 44 45 #include <linux/slab.h> 46 #include <linux/kernel.h> 47 #include <linux/vmalloc.h> 48 49 #include <linux/if_vlan.h> 50 51 #include <net/infiniband.h> 52 53 #include <rdma/ib_addr.h> 54 #include <rdma/ib_cache.h> 55 56 MODULE_AUTHOR("Roland Dreier"); 57 MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); 58 MODULE_LICENSE("Dual BSD/GPL"); 59 60 int ipoib_sendq_size = IPOIB_TX_RING_SIZE; 61 int ipoib_recvq_size = IPOIB_RX_RING_SIZE; 62 63 module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); 64 MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); 65 module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); 66 MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); 67 68 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 69 int ipoib_debug_level = 1; 70 71 module_param_named(debug_level, ipoib_debug_level, int, 0644); 72 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); 73 #endif 74 75 struct ipoib_path_iter { 76 struct ipoib_dev_priv *priv; 77 struct ipoib_path path; 78 }; 79 80 static const u8 ipv4_bcast_addr[] = { 81 0x00, 0xff, 0xff, 0xff, 82 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, 83 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff 84 }; 85 86 struct workqueue_struct *ipoib_workqueue; 87 88 struct ib_sa_client ipoib_sa_client; 89 90 static void ipoib_add_one(struct ib_device *device); 91 static void ipoib_remove_one(struct ib_device *device, void *client_data); 92 static if_t ipoib_get_net_dev_by_params( 93 struct ib_device *dev, u8 port, u16 pkey, 94 const union ib_gid *gid, const struct sockaddr *addr, 95 void *client_data); 96 static void ipoib_start(if_t dev); 97 static int ipoib_ioctl(if_t ifp, u_long command, caddr_t data); 98 99 static struct unrhdr *ipoib_unrhdr; 100 101 static void 102 ipoib_unrhdr_init(void *arg) 103 { 104 105 ipoib_unrhdr = new_unrhdr(0, 65535, NULL); 106 } 107 SYSINIT(ipoib_unrhdr_init, SI_SUB_KLD - 1, SI_ORDER_ANY, ipoib_unrhdr_init, NULL); 108 109 static void 110 ipoib_unrhdr_uninit(void *arg) 111 { 112 113 if (ipoib_unrhdr != NULL) { 114 struct unrhdr *hdr; 115 116 hdr = ipoib_unrhdr; 117 ipoib_unrhdr = NULL; 118 119 delete_unrhdr(hdr); 120 } 121 } 122 SYSUNINIT(ipoib_unrhdr_uninit, SI_SUB_KLD - 1, SI_ORDER_ANY, ipoib_unrhdr_uninit, NULL); 123 124 static struct ib_client ipoib_client = { 125 .name = "ipoib", 126 .add = ipoib_add_one, 127 .remove = ipoib_remove_one, 128 .get_net_dev_by_params = ipoib_get_net_dev_by_params, 129 }; 130 131 int 132 ipoib_open(struct ipoib_dev_priv *priv) 133 { 134 if_t dev = priv->dev; 135 136 ipoib_dbg(priv, "bringing up interface\n"); 137 138 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 139 140 if (ipoib_pkey_dev_delay_open(priv)) 141 return 0; 142 143 if (ipoib_ib_dev_open(priv)) 144 goto err_disable; 145 146 if (ipoib_ib_dev_up(priv)) 147 goto err_stop; 148 149 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 150 struct ipoib_dev_priv *cpriv; 151 152 /* Bring up any child interfaces too */ 153 mutex_lock(&priv->vlan_mutex); 154 list_for_each_entry(cpriv, &priv->child_intfs, list) 155 if ((if_getdrvflags(cpriv->dev) & IFF_DRV_RUNNING) == 0) 156 ipoib_open(cpriv); 157 mutex_unlock(&priv->vlan_mutex); 158 } 159 if_setdrvflagbits(dev, IFF_DRV_RUNNING, IFF_DRV_OACTIVE); 160 161 return 0; 162 163 err_stop: 164 ipoib_ib_dev_stop(priv, 1); 165 166 err_disable: 167 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 168 169 return -EINVAL; 170 } 171 172 static void 173 ipoib_init(void *arg) 174 { 175 if_t dev; 176 struct ipoib_dev_priv *priv; 177 178 priv = arg; 179 dev = priv->dev; 180 if ((if_getdrvflags(dev) & IFF_DRV_RUNNING) == 0) 181 ipoib_open(priv); 182 queue_work(ipoib_workqueue, &priv->flush_light); 183 } 184 185 186 static int 187 ipoib_stop(struct ipoib_dev_priv *priv) 188 { 189 if_t dev = priv->dev; 190 191 ipoib_dbg(priv, "stopping interface\n"); 192 193 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 194 195 if_setdrvflagbits(dev, 0, IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 196 197 ipoib_ib_dev_down(priv, 0); 198 ipoib_ib_dev_stop(priv, 0); 199 200 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 201 struct ipoib_dev_priv *cpriv; 202 203 /* Bring down any child interfaces too */ 204 mutex_lock(&priv->vlan_mutex); 205 list_for_each_entry(cpriv, &priv->child_intfs, list) 206 if ((if_getdrvflags(cpriv->dev) & IFF_DRV_RUNNING) != 0) 207 ipoib_stop(cpriv); 208 mutex_unlock(&priv->vlan_mutex); 209 } 210 211 return 0; 212 } 213 214 static int 215 ipoib_propagate_ifnet_mtu(struct ipoib_dev_priv *priv, int new_mtu, 216 bool propagate) 217 { 218 if_t ifp; 219 struct ifreq ifr; 220 int error; 221 222 ifp = priv->dev; 223 if (if_getmtu(ifp) == new_mtu) 224 return (0); 225 if (propagate) { 226 strlcpy(ifr.ifr_name, if_name(ifp), IFNAMSIZ); 227 ifr.ifr_mtu = new_mtu; 228 CURVNET_SET(if_getvnet(ifp)); 229 error = ifhwioctl(SIOCSIFMTU, ifp, (caddr_t)&ifr, curthread); 230 CURVNET_RESTORE(); 231 } else { 232 if_setmtu(ifp, new_mtu); 233 error = 0; 234 } 235 return (error); 236 } 237 238 int 239 ipoib_change_mtu(struct ipoib_dev_priv *priv, int new_mtu, bool propagate) 240 { 241 int error, prev_admin_mtu; 242 243 /* dev->if_mtu > 2K ==> connected mode */ 244 if (ipoib_cm_admin_enabled(priv)) { 245 if (new_mtu > IPOIB_CM_MTU(ipoib_cm_max_mtu(priv))) 246 return -EINVAL; 247 248 if (new_mtu > priv->mcast_mtu) 249 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", 250 priv->mcast_mtu); 251 252 return (ipoib_propagate_ifnet_mtu(priv, new_mtu, propagate)); 253 } 254 255 if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) 256 return -EINVAL; 257 258 prev_admin_mtu = priv->admin_mtu; 259 priv->admin_mtu = new_mtu; 260 error = ipoib_propagate_ifnet_mtu(priv, min(priv->mcast_mtu, 261 priv->admin_mtu), propagate); 262 if (error == 0) { 263 /* check for MTU change to avoid infinite loop */ 264 if (prev_admin_mtu != new_mtu) 265 queue_work(ipoib_workqueue, &priv->flush_light); 266 } else 267 priv->admin_mtu = prev_admin_mtu; 268 return (error); 269 } 270 271 static int 272 ipoib_ioctl(if_t ifp, u_long command, caddr_t data) 273 { 274 struct ipoib_dev_priv *priv = if_getsoftc(ifp); 275 struct ifaddr *ifa = (struct ifaddr *) data; 276 struct ifreq *ifr = (struct ifreq *) data; 277 int error = 0; 278 279 /* check if detaching */ 280 if (priv == NULL) 281 return (ENXIO); 282 /* wait for device to become ready, if any */ 283 while (priv->gone == 2) 284 pause("W", 1); 285 /* check for device gone */ 286 if (priv->gone != 0) 287 return (ENXIO); 288 289 switch (command) { 290 case SIOCSIFFLAGS: 291 if (if_getflags(ifp) & IFF_UP) { 292 if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0) 293 error = -ipoib_open(priv); 294 } else 295 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) 296 ipoib_stop(priv); 297 break; 298 case SIOCADDMULTI: 299 case SIOCDELMULTI: 300 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) 301 queue_work(ipoib_workqueue, &priv->restart_task); 302 break; 303 case SIOCSIFADDR: 304 if_setflagbits(ifp, IFF_UP, 0); 305 306 switch (ifa->ifa_addr->sa_family) { 307 #ifdef INET 308 case AF_INET: 309 if_init(ifp, if_getsoftc(ifp)); /* before arpwhohas */ 310 arp_ifinit(ifp, ifa); 311 break; 312 #endif 313 default: 314 if_init(ifp, if_getsoftc(ifp)); 315 break; 316 } 317 break; 318 319 case SIOCGIFADDR: 320 bcopy(if_getlladdr(ifp), &ifr->ifr_addr.sa_data[0], 321 INFINIBAND_ALEN); 322 break; 323 324 case SIOCSIFMTU: 325 /* 326 * Set the interface MTU. 327 */ 328 error = -ipoib_change_mtu(priv, ifr->ifr_mtu, false); 329 break; 330 default: 331 error = EINVAL; 332 break; 333 } 334 return (error); 335 } 336 337 338 static struct ipoib_path * 339 __path_find(struct ipoib_dev_priv *priv, void *gid) 340 { 341 struct rb_node *n = priv->path_tree.rb_node; 342 struct ipoib_path *path; 343 int ret; 344 345 while (n) { 346 path = rb_entry(n, struct ipoib_path, rb_node); 347 348 ret = memcmp(gid, path->pathrec.dgid.raw, 349 sizeof (union ib_gid)); 350 351 if (ret < 0) 352 n = n->rb_left; 353 else if (ret > 0) 354 n = n->rb_right; 355 else 356 return path; 357 } 358 359 return NULL; 360 } 361 362 static int 363 __path_add(struct ipoib_dev_priv *priv, struct ipoib_path *path) 364 { 365 struct rb_node **n = &priv->path_tree.rb_node; 366 struct rb_node *pn = NULL; 367 struct ipoib_path *tpath; 368 int ret; 369 370 while (*n) { 371 pn = *n; 372 tpath = rb_entry(pn, struct ipoib_path, rb_node); 373 374 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, 375 sizeof (union ib_gid)); 376 if (ret < 0) 377 n = &pn->rb_left; 378 else if (ret > 0) 379 n = &pn->rb_right; 380 else 381 return -EEXIST; 382 } 383 384 rb_link_node(&path->rb_node, pn, n); 385 rb_insert_color(&path->rb_node, &priv->path_tree); 386 387 list_add_tail(&path->list, &priv->path_list); 388 389 return 0; 390 } 391 392 void 393 ipoib_path_free(struct ipoib_dev_priv *priv, struct ipoib_path *path) 394 { 395 396 _IF_DRAIN(&path->queue); 397 398 if (path->ah) 399 ipoib_put_ah(path->ah); 400 if (ipoib_cm_get(path)) 401 ipoib_cm_destroy_tx(ipoib_cm_get(path)); 402 403 kfree(path); 404 } 405 406 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 407 408 struct ipoib_path_iter * 409 ipoib_path_iter_init(struct ipoib_dev_priv *priv) 410 { 411 struct ipoib_path_iter *iter; 412 413 iter = kmalloc(sizeof *iter, GFP_KERNEL); 414 if (!iter) 415 return NULL; 416 417 iter->priv = priv; 418 memset(iter->path.pathrec.dgid.raw, 0, 16); 419 420 if (ipoib_path_iter_next(iter)) { 421 kfree(iter); 422 return NULL; 423 } 424 425 return iter; 426 } 427 428 int 429 ipoib_path_iter_next(struct ipoib_path_iter *iter) 430 { 431 struct ipoib_dev_priv *priv = iter->priv; 432 struct rb_node *n; 433 struct ipoib_path *path; 434 int ret = 1; 435 436 spin_lock_irq(&priv->lock); 437 438 n = rb_first(&priv->path_tree); 439 440 while (n) { 441 path = rb_entry(n, struct ipoib_path, rb_node); 442 443 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, 444 sizeof (union ib_gid)) < 0) { 445 iter->path = *path; 446 ret = 0; 447 break; 448 } 449 450 n = rb_next(n); 451 } 452 453 spin_unlock_irq(&priv->lock); 454 455 return ret; 456 } 457 458 void 459 ipoib_path_iter_read(struct ipoib_path_iter *iter, struct ipoib_path *path) 460 { 461 *path = iter->path; 462 } 463 464 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ 465 466 void 467 ipoib_mark_paths_invalid(struct ipoib_dev_priv *priv) 468 { 469 struct ipoib_path *path, *tp; 470 471 spin_lock_irq(&priv->lock); 472 473 list_for_each_entry_safe(path, tp, &priv->path_list, list) { 474 ipoib_dbg(priv, "mark path LID 0x%04x GID %16D invalid\n", 475 be16_to_cpu(path->pathrec.dlid), 476 path->pathrec.dgid.raw, ":"); 477 path->valid = 0; 478 } 479 480 spin_unlock_irq(&priv->lock); 481 } 482 483 void 484 ipoib_flush_paths(struct ipoib_dev_priv *priv) 485 { 486 struct ipoib_path *path, *tp; 487 LIST_HEAD(remove_list); 488 unsigned long flags; 489 490 spin_lock_irqsave(&priv->lock, flags); 491 492 list_splice_init(&priv->path_list, &remove_list); 493 494 list_for_each_entry(path, &remove_list, list) 495 rb_erase(&path->rb_node, &priv->path_tree); 496 497 list_for_each_entry_safe(path, tp, &remove_list, list) { 498 if (path->query) 499 ib_sa_cancel_query(path->query_id, path->query); 500 spin_unlock_irqrestore(&priv->lock, flags); 501 wait_for_completion(&path->done); 502 ipoib_path_free(priv, path); 503 spin_lock_irqsave(&priv->lock, flags); 504 } 505 506 spin_unlock_irqrestore(&priv->lock, flags); 507 } 508 509 static void 510 path_rec_completion(int status, struct ib_sa_path_rec *pathrec, void *path_ptr) 511 { 512 struct ipoib_path *path = path_ptr; 513 struct ipoib_dev_priv *priv = path->priv; 514 if_t dev = priv->dev; 515 struct ipoib_ah *ah = NULL; 516 struct ipoib_ah *old_ah = NULL; 517 struct epoch_tracker et; 518 struct ifqueue mbqueue; 519 struct mbuf *mb; 520 unsigned long flags; 521 522 if (!status) 523 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %16D\n", 524 be16_to_cpu(pathrec->dlid), pathrec->dgid.raw, ":"); 525 else 526 ipoib_dbg(priv, "PathRec status %d for GID %16D\n", 527 status, path->pathrec.dgid.raw, ":"); 528 529 bzero(&mbqueue, sizeof(mbqueue)); 530 531 if (!status) { 532 struct ib_ah_attr av; 533 534 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) 535 ah = ipoib_create_ah(priv, priv->pd, &av); 536 } 537 538 spin_lock_irqsave(&priv->lock, flags); 539 540 if (ah) { 541 path->pathrec = *pathrec; 542 543 old_ah = path->ah; 544 path->ah = ah; 545 546 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", 547 ah, be16_to_cpu(pathrec->dlid), pathrec->sl); 548 549 for (;;) { 550 _IF_DEQUEUE(&path->queue, mb); 551 if (mb == NULL) 552 break; 553 _IF_ENQUEUE(&mbqueue, mb); 554 } 555 556 #ifdef CONFIG_INFINIBAND_IPOIB_CM 557 if (ipoib_cm_enabled(priv, path->hwaddr) && !ipoib_cm_get(path)) 558 ipoib_cm_set(path, ipoib_cm_create_tx(priv, path)); 559 #endif 560 561 path->valid = 1; 562 } 563 564 path->query = NULL; 565 complete(&path->done); 566 567 spin_unlock_irqrestore(&priv->lock, flags); 568 569 if (old_ah) 570 ipoib_put_ah(old_ah); 571 572 NET_EPOCH_ENTER(et); 573 for (;;) { 574 _IF_DEQUEUE(&mbqueue, mb); 575 if (mb == NULL) 576 break; 577 mb->m_pkthdr.rcvif = dev; 578 if (if_transmit(dev, mb)) 579 ipoib_warn(priv, "dev_queue_xmit failed " 580 "to requeue packet\n"); 581 } 582 NET_EPOCH_EXIT(et); 583 } 584 585 static struct ipoib_path * 586 path_rec_create(struct ipoib_dev_priv *priv, uint8_t *hwaddr) 587 { 588 struct ipoib_path *path; 589 590 if (!priv->broadcast) 591 return NULL; 592 593 path = kzalloc(sizeof *path, GFP_ATOMIC); 594 if (!path) 595 return NULL; 596 597 path->priv = priv; 598 599 bzero(&path->queue, sizeof(path->queue)); 600 601 #ifdef CONFIG_INFINIBAND_IPOIB_CM 602 memcpy(&path->hwaddr, hwaddr, INFINIBAND_ALEN); 603 #endif 604 memcpy(path->pathrec.dgid.raw, &hwaddr[4], sizeof (union ib_gid)); 605 path->pathrec.sgid = priv->local_gid; 606 path->pathrec.pkey = cpu_to_be16(priv->pkey); 607 path->pathrec.numb_path = 1; 608 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; 609 610 return path; 611 } 612 613 static int 614 path_rec_start(struct ipoib_dev_priv *priv, struct ipoib_path *path) 615 { 616 if_t dev = priv->dev; 617 618 ib_sa_comp_mask comp_mask = IB_SA_PATH_REC_MTU_SELECTOR | IB_SA_PATH_REC_MTU; 619 struct ib_sa_path_rec p_rec; 620 621 p_rec = path->pathrec; 622 p_rec.mtu_selector = IB_SA_GT; 623 624 switch (roundup_pow_of_two(if_getmtu(dev) + IPOIB_ENCAP_LEN)) { 625 case 512: 626 p_rec.mtu = IB_MTU_256; 627 break; 628 case 1024: 629 p_rec.mtu = IB_MTU_512; 630 break; 631 case 2048: 632 p_rec.mtu = IB_MTU_1024; 633 break; 634 case 4096: 635 p_rec.mtu = IB_MTU_2048; 636 break; 637 default: 638 /* Wildcard everything */ 639 comp_mask = 0; 640 p_rec.mtu = 0; 641 p_rec.mtu_selector = 0; 642 } 643 644 ipoib_dbg(priv, "Start path record lookup for %16D MTU > %d\n", 645 p_rec.dgid.raw, ":", 646 comp_mask ? ib_mtu_enum_to_int(p_rec.mtu) : 0); 647 648 init_completion(&path->done); 649 650 path->query_id = 651 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, 652 &p_rec, comp_mask | 653 IB_SA_PATH_REC_DGID | 654 IB_SA_PATH_REC_SGID | 655 IB_SA_PATH_REC_NUMB_PATH | 656 IB_SA_PATH_REC_TRAFFIC_CLASS | 657 IB_SA_PATH_REC_PKEY, 658 1000, GFP_ATOMIC, 659 path_rec_completion, 660 path, &path->query); 661 if (path->query_id < 0) { 662 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); 663 path->query = NULL; 664 complete(&path->done); 665 return path->query_id; 666 } 667 668 return 0; 669 } 670 671 static void 672 ipoib_unicast_send(struct mbuf *mb, struct ipoib_dev_priv *priv, struct ipoib_header *eh) 673 { 674 struct ipoib_path *path; 675 676 path = __path_find(priv, eh->hwaddr + 4); 677 if (!path || !path->valid) { 678 int new_path = 0; 679 680 if (!path) { 681 path = path_rec_create(priv, eh->hwaddr); 682 new_path = 1; 683 } 684 if (path) { 685 if (_IF_QLEN(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) 686 _IF_ENQUEUE(&path->queue, mb); 687 else { 688 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 689 m_freem(mb); 690 } 691 692 if (!path->query && path_rec_start(priv, path)) { 693 if (new_path) 694 ipoib_path_free(priv, path); 695 return; 696 } else 697 __path_add(priv, path); 698 } else { 699 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 700 m_freem(mb); 701 } 702 703 return; 704 } 705 706 if (ipoib_cm_get(path) && ipoib_cm_up(path)) { 707 ipoib_cm_send(priv, mb, ipoib_cm_get(path)); 708 } else if (path->ah) { 709 ipoib_send(priv, mb, path->ah, IPOIB_QPN(eh->hwaddr)); 710 } else if ((path->query || !path_rec_start(priv, path)) && 711 path->queue.ifq_len < IPOIB_MAX_PATH_REC_QUEUE) { 712 _IF_ENQUEUE(&path->queue, mb); 713 } else { 714 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 715 m_freem(mb); 716 } 717 } 718 719 static int 720 ipoib_send_one(struct ipoib_dev_priv *priv, struct mbuf *mb) 721 { 722 struct ipoib_header *eh; 723 724 eh = mtod(mb, struct ipoib_header *); 725 if (IPOIB_IS_MULTICAST(eh->hwaddr)) { 726 /* Add in the P_Key for multicast*/ 727 eh->hwaddr[8] = (priv->pkey >> 8) & 0xff; 728 eh->hwaddr[9] = priv->pkey & 0xff; 729 730 ipoib_mcast_send(priv, eh->hwaddr + 4, mb); 731 } else 732 ipoib_unicast_send(mb, priv, eh); 733 734 return 0; 735 } 736 737 void 738 ipoib_start_locked(if_t dev, struct ipoib_dev_priv *priv) 739 { 740 struct mbuf *mb; 741 742 assert_spin_locked(&priv->lock); 743 744 while (!if_sendq_empty(dev) && 745 (if_getdrvflags(dev) & IFF_DRV_OACTIVE) == 0) { 746 mb = if_dequeue(dev); 747 if (mb == NULL) 748 break; 749 infiniband_bpf_mtap(dev, mb); 750 ipoib_send_one(priv, mb); 751 } 752 } 753 754 static void 755 _ipoib_start(if_t dev, struct ipoib_dev_priv *priv) 756 { 757 758 if ((if_getdrvflags(dev) & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) != 759 IFF_DRV_RUNNING) 760 return; 761 762 spin_lock(&priv->lock); 763 ipoib_start_locked(dev, priv); 764 spin_unlock(&priv->lock); 765 } 766 767 static void 768 ipoib_start(if_t dev) 769 { 770 _ipoib_start(dev, if_getsoftc(dev)); 771 } 772 773 static void 774 ipoib_vlan_start(if_t dev) 775 { 776 struct ipoib_dev_priv *priv; 777 struct mbuf *mb; 778 779 priv = VLAN_COOKIE(dev); 780 if (priv != NULL) 781 return _ipoib_start(dev, priv); 782 while (!if_sendq_empty(dev)) { 783 mb = if_dequeue(dev); 784 if (mb == NULL) 785 break; 786 m_freem(mb); 787 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 788 } 789 } 790 791 int 792 ipoib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port) 793 { 794 795 /* Allocate RX/TX "rings" to hold queued mbs */ 796 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, 797 GFP_KERNEL); 798 if (!priv->rx_ring) { 799 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", 800 ca->name, ipoib_recvq_size); 801 goto out; 802 } 803 804 priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, GFP_KERNEL); 805 if (!priv->tx_ring) { 806 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", 807 ca->name, ipoib_sendq_size); 808 goto out_rx_ring_cleanup; 809 } 810 memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring); 811 812 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ 813 814 if (ipoib_ib_dev_init(priv, ca, port)) 815 goto out_tx_ring_cleanup; 816 817 return 0; 818 819 out_tx_ring_cleanup: 820 kfree(priv->tx_ring); 821 822 out_rx_ring_cleanup: 823 kfree(priv->rx_ring); 824 825 out: 826 return -ENOMEM; 827 } 828 829 static void 830 ipoib_ifdetach(struct ipoib_dev_priv *priv) 831 { 832 if_t dev; 833 834 dev = priv->dev; 835 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 836 priv->gone = 1; 837 infiniband_ifdetach(dev); 838 } 839 } 840 841 static void 842 ipoib_detach(struct ipoib_dev_priv *priv) 843 { 844 if_t dev; 845 846 dev = priv->dev; 847 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 848 if_free(dev); 849 free_unr(ipoib_unrhdr, priv->unit); 850 } else 851 VLAN_SETCOOKIE(priv->dev, NULL); 852 853 free(priv, M_TEMP); 854 } 855 856 void 857 ipoib_dev_cleanup(struct ipoib_dev_priv *priv) 858 { 859 struct ipoib_dev_priv *cpriv, *tcpriv; 860 861 /* Delete any child interfaces first */ 862 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { 863 ipoib_ifdetach(cpriv); 864 ipoib_dev_cleanup(cpriv); 865 ipoib_detach(cpriv); 866 } 867 868 ipoib_ib_dev_cleanup(priv); 869 870 kfree(priv->rx_ring); 871 kfree(priv->tx_ring); 872 873 priv->rx_ring = NULL; 874 priv->tx_ring = NULL; 875 } 876 877 static struct ipoib_dev_priv * 878 ipoib_priv_alloc(void) 879 { 880 struct ipoib_dev_priv *priv; 881 882 priv = malloc(sizeof(struct ipoib_dev_priv), M_TEMP, M_ZERO|M_WAITOK); 883 spin_lock_init(&priv->lock); 884 spin_lock_init(&priv->drain_lock); 885 mutex_init(&priv->vlan_mutex); 886 INIT_LIST_HEAD(&priv->path_list); 887 INIT_LIST_HEAD(&priv->child_intfs); 888 INIT_LIST_HEAD(&priv->dead_ahs); 889 INIT_LIST_HEAD(&priv->multicast_list); 890 INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); 891 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); 892 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); 893 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); 894 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); 895 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); 896 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); 897 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); 898 memcpy(priv->broadcastaddr, ipv4_bcast_addr, INFINIBAND_ALEN); 899 900 return (priv); 901 } 902 903 struct ipoib_dev_priv * 904 ipoib_intf_alloc(const char *name, struct ib_device *hca) 905 { 906 struct ipoib_dev_priv *priv; 907 if_t dev; 908 909 priv = ipoib_priv_alloc(); 910 dev = priv->dev = if_alloc(IFT_INFINIBAND); 911 if (!dev) { 912 free(priv, M_TEMP); 913 return NULL; 914 } 915 if_setsoftc(dev, priv); 916 priv->gone = 2; /* initializing */ 917 priv->unit = alloc_unr(ipoib_unrhdr); 918 if (priv->unit == -1) { 919 if_free(dev); 920 free(priv, M_TEMP); 921 return NULL; 922 } 923 if_initname(dev, name, priv->unit); 924 if_setflags(dev, IFF_BROADCAST | IFF_MULTICAST); 925 if ((hca->attrs.device_cap_flags & IB_DEVICE_KNOWSEPOCH) == 0) 926 if_setflagbits(dev, IFF_NEEDSEPOCH, 0); 927 928 infiniband_ifattach(priv->dev, NULL, priv->broadcastaddr); 929 930 if_setinitfn(dev, ipoib_init); 931 if_setioctlfn(dev, ipoib_ioctl); 932 if_setstartfn(dev, ipoib_start); 933 934 if_setsendqlen(dev, ipoib_sendq_size * 2); 935 936 priv->dev = dev; 937 if_link_state_change(priv->dev, LINK_STATE_DOWN); 938 939 return if_getsoftc(dev); 940 } 941 942 int 943 ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) 944 { 945 struct ib_device_attr *device_attr = &hca->attrs; 946 947 priv->hca_caps = device_attr->device_cap_flags; 948 949 if_sethwassist(priv->dev, 0); 950 if_setcapabilities(priv->dev, 0); 951 952 #ifndef CONFIG_INFINIBAND_IPOIB_CM 953 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { 954 set_bit(IPOIB_FLAG_CSUM, &priv->flags); 955 if_sethwassist(priv->dev, CSUM_IP | CSUM_TCP | CSUM_UDP); 956 if_setcapabilities(priv->dev, IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM); 957 } 958 959 #if 0 960 if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO) { 961 priv->dev->if_capabilities |= IFCAP_TSO4; 962 priv->dev->if_hwassist |= CSUM_TSO; 963 } 964 #endif 965 #endif 966 if_setcapabilitiesbit(priv->dev, 967 IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_LINKSTATE, 0); 968 if_setcapenable(priv->dev, if_getcapabilities(priv->dev)); 969 970 return 0; 971 } 972 973 974 static if_t 975 ipoib_add_port(const char *format, struct ib_device *hca, u8 port) 976 { 977 struct ipoib_dev_priv *priv; 978 struct ib_port_attr attr; 979 int result = -ENOMEM; 980 981 priv = ipoib_intf_alloc(format, hca); 982 if (!priv) 983 goto alloc_mem_failed; 984 985 if (!ib_query_port(hca, port, &attr)) 986 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); 987 else { 988 printk(KERN_WARNING "%s: ib_query_port %d failed\n", 989 hca->name, port); 990 goto device_init_failed; 991 } 992 993 /* MTU will be reset when mcast join happens */ 994 if_setmtu(priv->dev, IPOIB_UD_MTU(priv->max_ib_mtu)); 995 priv->mcast_mtu = priv->admin_mtu = if_getmtu(priv->dev); 996 997 result = ib_query_pkey(hca, port, 0, &priv->pkey); 998 if (result) { 999 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", 1000 hca->name, port, result); 1001 goto device_init_failed; 1002 } 1003 1004 if (ipoib_set_dev_features(priv, hca)) 1005 goto device_init_failed; 1006 1007 /* 1008 * Set the full membership bit, so that we join the right 1009 * broadcast group, etc. 1010 */ 1011 priv->pkey |= 0x8000; 1012 1013 priv->broadcastaddr[8] = priv->pkey >> 8; 1014 priv->broadcastaddr[9] = priv->pkey & 0xff; 1015 1016 result = ib_query_gid(hca, port, 0, &priv->local_gid, NULL); 1017 if (result) { 1018 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", 1019 hca->name, port, result); 1020 goto device_init_failed; 1021 } 1022 memcpy(if_getlladdr(priv->dev) + 4, priv->local_gid.raw, sizeof(union ib_gid)); 1023 1024 result = ipoib_dev_init(priv, hca, port); 1025 if (result < 0) { 1026 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", 1027 hca->name, port, result); 1028 goto device_init_failed; 1029 } 1030 if (ipoib_cm_admin_enabled(priv)) 1031 if_setmtu(priv->dev, IPOIB_CM_MTU(ipoib_cm_max_mtu(priv))); 1032 1033 INIT_IB_EVENT_HANDLER(&priv->event_handler, 1034 priv->ca, ipoib_event); 1035 result = ib_register_event_handler(&priv->event_handler); 1036 if (result < 0) { 1037 printk(KERN_WARNING "%s: ib_register_event_handler failed for " 1038 "port %d (ret = %d)\n", 1039 hca->name, port, result); 1040 goto event_failed; 1041 } 1042 if_printf(priv->dev, "Attached to %s port %d\n", hca->name, port); 1043 1044 priv->gone = 0; /* ready */ 1045 1046 return priv->dev; 1047 1048 event_failed: 1049 ipoib_dev_cleanup(priv); 1050 1051 device_init_failed: 1052 ipoib_ifdetach(priv); 1053 ipoib_detach(priv); 1054 1055 alloc_mem_failed: 1056 return ERR_PTR(result); 1057 } 1058 1059 static void 1060 ipoib_add_one(struct ib_device *device) 1061 { 1062 struct list_head *dev_list; 1063 if_t dev; 1064 struct ipoib_dev_priv *priv; 1065 int s, e, p; 1066 1067 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 1068 return; 1069 1070 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); 1071 if (!dev_list) 1072 return; 1073 1074 INIT_LIST_HEAD(dev_list); 1075 1076 if (device->node_type == RDMA_NODE_IB_SWITCH) { 1077 s = 0; 1078 e = 0; 1079 } else { 1080 s = 1; 1081 e = device->phys_port_cnt; 1082 } 1083 1084 for (p = s; p <= e; ++p) { 1085 if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND) 1086 continue; 1087 dev = ipoib_add_port("ib", device, p); 1088 if (!IS_ERR(dev)) { 1089 priv = if_getsoftc(dev); 1090 list_add_tail(&priv->list, dev_list); 1091 } 1092 } 1093 1094 ib_set_client_data(device, &ipoib_client, dev_list); 1095 } 1096 1097 static void 1098 ipoib_remove_one(struct ib_device *device, void *client_data) 1099 { 1100 struct ipoib_dev_priv *priv, *tmp; 1101 struct list_head *dev_list = client_data; 1102 1103 if (!dev_list) 1104 return; 1105 1106 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 1107 return; 1108 1109 list_for_each_entry_safe(priv, tmp, dev_list, list) { 1110 if (rdma_port_get_link_layer(device, priv->port) != IB_LINK_LAYER_INFINIBAND) 1111 continue; 1112 1113 ipoib_ifdetach(priv); 1114 ipoib_stop(priv); 1115 1116 ib_unregister_event_handler(&priv->event_handler); 1117 1118 flush_workqueue(ipoib_workqueue); 1119 1120 ipoib_dev_cleanup(priv); 1121 ipoib_detach(priv); 1122 } 1123 1124 kfree(dev_list); 1125 } 1126 1127 static u_int 1128 ipoib_match_dev_addr_cb(void *arg, struct ifaddr *ifa, u_int count) 1129 { 1130 struct sockaddr *addr = arg; 1131 1132 /* If a match is already found, skip this. */ 1133 if (count > 0) 1134 return (0); 1135 1136 if (ifa->ifa_addr->sa_len != addr->sa_len) 1137 return (0); 1138 1139 if (memcmp(ifa->ifa_addr, addr, addr->sa_len) == 0) 1140 return (1); 1141 1142 return (0); 1143 } 1144 1145 static int 1146 ipoib_match_dev_addr(const struct sockaddr *addr, if_t dev) 1147 { 1148 struct epoch_tracker et; 1149 int retval = 0; 1150 1151 NET_EPOCH_ENTER(et); 1152 retval = if_foreach_addr_type(dev, addr->sa_family, 1153 ipoib_match_dev_addr_cb, __DECONST(void *, addr)); 1154 NET_EPOCH_EXIT(et); 1155 1156 return (retval); 1157 } 1158 1159 /* 1160 * ipoib_match_gid_pkey_addr - returns the number of IPoIB netdevs on 1161 * top a given ipoib device matching a pkey_index and address, if one 1162 * exists. 1163 * 1164 * @found_net_dev: contains a matching net_device if the return value 1165 * >= 1, with a reference held. 1166 */ 1167 static int 1168 ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv, 1169 const union ib_gid *gid, u16 pkey_index, const struct sockaddr *addr, 1170 if_t *found_net_dev) 1171 { 1172 struct ipoib_dev_priv *child_priv; 1173 int matches = 0; 1174 1175 if (priv->pkey_index == pkey_index && 1176 (!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) { 1177 if (addr == NULL || ipoib_match_dev_addr(addr, priv->dev) != 0) { 1178 if (*found_net_dev == NULL) { 1179 if_t net_dev; 1180 1181 if (priv->parent != NULL) 1182 net_dev = priv->parent; 1183 else 1184 net_dev = priv->dev; 1185 *found_net_dev = net_dev; 1186 dev_hold(net_dev); 1187 } 1188 matches++; 1189 } 1190 } 1191 1192 /* Check child interfaces */ 1193 mutex_lock(&priv->vlan_mutex); 1194 list_for_each_entry(child_priv, &priv->child_intfs, list) { 1195 matches += ipoib_match_gid_pkey_addr(child_priv, gid, 1196 pkey_index, addr, found_net_dev); 1197 if (matches > 1) 1198 break; 1199 } 1200 mutex_unlock(&priv->vlan_mutex); 1201 1202 return matches; 1203 } 1204 1205 /* 1206 * __ipoib_get_net_dev_by_params - returns the number of matching 1207 * net_devs found (between 0 and 2). Also return the matching 1208 * net_device in the @net_dev parameter, holding a reference to the 1209 * net_device, if the number of matches >= 1 1210 */ 1211 static int 1212 __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port, 1213 u16 pkey_index, const union ib_gid *gid, 1214 const struct sockaddr *addr, if_t *net_dev) 1215 { 1216 struct ipoib_dev_priv *priv; 1217 int matches = 0; 1218 1219 *net_dev = NULL; 1220 1221 list_for_each_entry(priv, dev_list, list) { 1222 if (priv->port != port) 1223 continue; 1224 1225 matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index, 1226 addr, net_dev); 1227 1228 if (matches > 1) 1229 break; 1230 } 1231 1232 return matches; 1233 } 1234 1235 static if_t 1236 ipoib_get_net_dev_by_params(struct ib_device *dev, u8 port, u16 pkey, 1237 const union ib_gid *gid, const struct sockaddr *addr, void *client_data) 1238 { 1239 if_t net_dev; 1240 struct list_head *dev_list = client_data; 1241 u16 pkey_index; 1242 int matches; 1243 int ret; 1244 1245 if (!rdma_protocol_ib(dev, port)) 1246 return NULL; 1247 1248 ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index); 1249 if (ret) 1250 return NULL; 1251 1252 if (!dev_list) 1253 return NULL; 1254 1255 /* See if we can find a unique device matching the L2 parameters */ 1256 matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, 1257 gid, NULL, &net_dev); 1258 1259 switch (matches) { 1260 case 0: 1261 return NULL; 1262 case 1: 1263 return net_dev; 1264 } 1265 1266 dev_put(net_dev); 1267 1268 /* Couldn't find a unique device with L2 parameters only. Use L3 1269 * address to uniquely match the net device */ 1270 matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index, 1271 gid, addr, &net_dev); 1272 switch (matches) { 1273 case 0: 1274 return NULL; 1275 default: 1276 dev_warn_ratelimited(&dev->dev, 1277 "duplicate IP address detected\n"); 1278 /* Fall through */ 1279 case 1: 1280 return net_dev; 1281 } 1282 } 1283 1284 static void 1285 ipoib_config_vlan(void *arg, if_t ifp, uint16_t vtag) 1286 { 1287 struct ipoib_dev_priv *parent; 1288 struct ipoib_dev_priv *priv; 1289 struct epoch_tracker et; 1290 if_t dev; 1291 uint16_t pkey; 1292 int error; 1293 1294 if (if_gettype(ifp) != IFT_INFINIBAND) 1295 return; 1296 NET_EPOCH_ENTER(et); 1297 dev = VLAN_DEVAT(ifp, vtag); 1298 NET_EPOCH_EXIT(et); 1299 if (dev == NULL) 1300 return; 1301 priv = NULL; 1302 error = 0; 1303 parent = if_getsoftc(ifp); 1304 /* We only support 15 bits of pkey. */ 1305 if (vtag & 0x8000) 1306 return; 1307 pkey = vtag | 0x8000; /* Set full membership bit. */ 1308 if (pkey == parent->pkey) 1309 return; 1310 /* Check for dups */ 1311 mutex_lock(&parent->vlan_mutex); 1312 list_for_each_entry(priv, &parent->child_intfs, list) { 1313 if (priv->pkey == pkey) { 1314 priv = NULL; 1315 error = EBUSY; 1316 goto out; 1317 } 1318 } 1319 priv = ipoib_priv_alloc(); 1320 priv->dev = dev; 1321 priv->max_ib_mtu = parent->max_ib_mtu; 1322 priv->mcast_mtu = priv->admin_mtu = if_getmtu(parent->dev); 1323 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags); 1324 error = ipoib_set_dev_features(priv, parent->ca); 1325 if (error) 1326 goto out; 1327 priv->pkey = pkey; 1328 priv->broadcastaddr[8] = pkey >> 8; 1329 priv->broadcastaddr[9] = pkey & 0xff; 1330 if_setbroadcastaddr(dev, priv->broadcastaddr); 1331 error = ipoib_dev_init(priv, parent->ca, parent->port); 1332 if (error) 1333 goto out; 1334 priv->parent = parent->dev; 1335 list_add_tail(&priv->list, &parent->child_intfs); 1336 VLAN_SETCOOKIE(dev, priv); 1337 if_setstartfn(dev, ipoib_vlan_start); 1338 if_setdrvflagbits(dev, 0, IFF_DRV_RUNNING); 1339 if_setifheaderlen(dev, IPOIB_HEADER_LEN); 1340 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) 1341 ipoib_open(priv); 1342 mutex_unlock(&parent->vlan_mutex); 1343 return; 1344 out: 1345 mutex_unlock(&parent->vlan_mutex); 1346 if (priv) 1347 free(priv, M_TEMP); 1348 if (error) 1349 ipoib_warn(parent, 1350 "failed to initialize subinterface: device %s, port %d vtag 0x%X", 1351 parent->ca->name, parent->port, vtag); 1352 return; 1353 } 1354 1355 static void 1356 ipoib_unconfig_vlan(void *arg, if_t ifp, uint16_t vtag) 1357 { 1358 struct ipoib_dev_priv *parent; 1359 struct ipoib_dev_priv *priv; 1360 struct epoch_tracker et; 1361 if_t dev; 1362 uint16_t pkey; 1363 1364 if (if_gettype(ifp) != IFT_INFINIBAND) 1365 return; 1366 1367 NET_EPOCH_ENTER(et); 1368 dev = VLAN_DEVAT(ifp, vtag); 1369 NET_EPOCH_EXIT(et); 1370 if (dev) 1371 VLAN_SETCOOKIE(dev, NULL); 1372 pkey = vtag | 0x8000; 1373 parent = if_getsoftc(ifp); 1374 mutex_lock(&parent->vlan_mutex); 1375 list_for_each_entry(priv, &parent->child_intfs, list) { 1376 if (priv->pkey == pkey) { 1377 ipoib_dev_cleanup(priv); 1378 list_del(&priv->list); 1379 break; 1380 } 1381 } 1382 mutex_unlock(&parent->vlan_mutex); 1383 } 1384 1385 eventhandler_tag ipoib_vlan_attach; 1386 eventhandler_tag ipoib_vlan_detach; 1387 1388 static int __init 1389 ipoib_init_module(void) 1390 { 1391 int ret; 1392 1393 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); 1394 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); 1395 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); 1396 1397 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); 1398 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); 1399 ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE, 1400 IPOIB_MIN_QUEUE_SIZE)); 1401 #ifdef CONFIG_INFINIBAND_IPOIB_CM 1402 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); 1403 #endif 1404 1405 ipoib_vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 1406 ipoib_config_vlan, NULL, EVENTHANDLER_PRI_FIRST); 1407 ipoib_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 1408 ipoib_unconfig_vlan, NULL, EVENTHANDLER_PRI_FIRST); 1409 1410 /* 1411 * We create our own workqueue mainly because we want to be 1412 * able to flush it when devices are being removed. We can't 1413 * use schedule_work()/flush_scheduled_work() because both 1414 * unregister_netdev() and linkwatch_event take the rtnl lock, 1415 * so flush_scheduled_work() can deadlock during device 1416 * removal. 1417 */ 1418 ipoib_workqueue = create_singlethread_workqueue("ipoib"); 1419 if (!ipoib_workqueue) { 1420 ret = -ENOMEM; 1421 goto err_fs; 1422 } 1423 1424 ib_sa_register_client(&ipoib_sa_client); 1425 1426 ret = ib_register_client(&ipoib_client); 1427 if (ret) 1428 goto err_sa; 1429 1430 return 0; 1431 1432 err_sa: 1433 ib_sa_unregister_client(&ipoib_sa_client); 1434 destroy_workqueue(ipoib_workqueue); 1435 1436 err_fs: 1437 return ret; 1438 } 1439 1440 static void __exit 1441 ipoib_cleanup_module(void) 1442 { 1443 1444 EVENTHANDLER_DEREGISTER(vlan_config, ipoib_vlan_attach); 1445 EVENTHANDLER_DEREGISTER(vlan_unconfig, ipoib_vlan_detach); 1446 ib_unregister_client(&ipoib_client); 1447 ib_sa_unregister_client(&ipoib_sa_client); 1448 destroy_workqueue(ipoib_workqueue); 1449 } 1450 module_init_order(ipoib_init_module, SI_ORDER_FIFTH); 1451 module_exit_order(ipoib_cleanup_module, SI_ORDER_FIFTH); 1452 1453 static int 1454 ipoib_evhand(module_t mod, int event, void *arg) 1455 { 1456 return (0); 1457 } 1458 1459 static moduledata_t ipoib_mod = { 1460 .name = "ipoib", 1461 .evhand = ipoib_evhand, 1462 }; 1463 1464 DECLARE_MODULE(ipoib, ipoib_mod, SI_SUB_LAST, SI_ORDER_ANY); 1465 MODULE_DEPEND(ipoib, ibcore, 1, 1, 1); 1466 MODULE_DEPEND(ipoib, if_infiniband, 1, 1, 1); 1467 MODULE_DEPEND(ipoib, linuxkpi, 1, 1, 1); 1468