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