1 /* 2 * Copyright (c) 2004 Topspin Communications. All rights reserved. 3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. 4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include "ipoib.h" 36 37 static int ipoib_resolvemulti(struct ifnet *, struct sockaddr **, 38 struct sockaddr *); 39 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_arp.h> /* For ARPHRD_xxx */ 48 #include <linux/if_vlan.h> 49 #include <net/ip.h> 50 #include <net/ipv6.h> 51 52 MODULE_AUTHOR("Roland Dreier"); 53 MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); 54 MODULE_LICENSE("Dual BSD/GPL"); 55 56 int ipoib_sendq_size = IPOIB_TX_RING_SIZE; 57 int ipoib_recvq_size = IPOIB_RX_RING_SIZE; 58 59 module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); 60 MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); 61 module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); 62 MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); 63 64 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 65 int ipoib_debug_level = 1; 66 67 module_param_named(debug_level, ipoib_debug_level, int, 0644); 68 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); 69 #endif 70 71 struct ipoib_path_iter { 72 struct ipoib_dev_priv *priv; 73 struct ipoib_path path; 74 }; 75 76 static const u8 ipv4_bcast_addr[] = { 77 0x00, 0xff, 0xff, 0xff, 78 0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00, 79 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff 80 }; 81 82 struct workqueue_struct *ipoib_workqueue; 83 84 struct ib_sa_client ipoib_sa_client; 85 86 static void ipoib_add_one(struct ib_device *device); 87 static void ipoib_remove_one(struct ib_device *device); 88 static void ipoib_start(struct ifnet *dev); 89 static int ipoib_output(struct ifnet *ifp, struct mbuf *m, 90 const struct sockaddr *dst, struct route *ro); 91 static int ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data); 92 static void ipoib_input(struct ifnet *ifp, struct mbuf *m); 93 94 #define IPOIB_MTAP(_ifp, _m) \ 95 do { \ 96 if (bpf_peers_present((_ifp)->if_bpf)) { \ 97 M_ASSERTVALID(_m); \ 98 ipoib_mtap_mb((_ifp), (_m)); \ 99 } \ 100 } while (0) 101 102 /* 103 * This is for clients that have an ipoib_header in the mbuf. 104 */ 105 static void 106 ipoib_mtap_mb(struct ifnet *ifp, struct mbuf *mb) 107 { 108 struct ipoib_header *ih; 109 struct ether_header eh; 110 111 ih = mtod(mb, struct ipoib_header *); 112 eh.ether_type = ih->proto; 113 bcopy(ih->hwaddr, &eh.ether_dhost, ETHER_ADDR_LEN); 114 bzero(&eh.ether_shost, ETHER_ADDR_LEN); 115 mb->m_data += sizeof(struct ipoib_header); 116 mb->m_len -= sizeof(struct ipoib_header); 117 bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb); 118 mb->m_data -= sizeof(struct ipoib_header); 119 mb->m_len += sizeof(struct ipoib_header); 120 } 121 122 void 123 ipoib_mtap_proto(struct ifnet *ifp, struct mbuf *mb, uint16_t proto) 124 { 125 struct ether_header eh; 126 127 eh.ether_type = proto; 128 bzero(&eh.ether_shost, ETHER_ADDR_LEN); 129 bzero(&eh.ether_dhost, ETHER_ADDR_LEN); 130 bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb); 131 } 132 133 static struct ib_client ipoib_client = { 134 .name = "ipoib", 135 .add = ipoib_add_one, 136 .remove = ipoib_remove_one 137 }; 138 139 int 140 ipoib_open(struct ipoib_dev_priv *priv) 141 { 142 struct ifnet *dev = priv->dev; 143 144 ipoib_dbg(priv, "bringing up interface\n"); 145 146 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 147 148 if (ipoib_pkey_dev_delay_open(priv)) 149 return 0; 150 151 if (ipoib_ib_dev_open(priv)) 152 goto err_disable; 153 154 if (ipoib_ib_dev_up(priv)) 155 goto err_stop; 156 157 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 158 struct ipoib_dev_priv *cpriv; 159 160 /* Bring up any child interfaces too */ 161 mutex_lock(&priv->vlan_mutex); 162 list_for_each_entry(cpriv, &priv->child_intfs, list) 163 if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) == 0) 164 ipoib_open(cpriv); 165 mutex_unlock(&priv->vlan_mutex); 166 } 167 dev->if_drv_flags |= IFF_DRV_RUNNING; 168 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 169 170 return 0; 171 172 err_stop: 173 ipoib_ib_dev_stop(priv, 1); 174 175 err_disable: 176 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 177 178 return -EINVAL; 179 } 180 181 static void 182 ipoib_init(void *arg) 183 { 184 struct ifnet *dev; 185 struct ipoib_dev_priv *priv; 186 187 priv = arg; 188 dev = priv->dev; 189 if ((dev->if_drv_flags & IFF_DRV_RUNNING) == 0) 190 ipoib_open(priv); 191 queue_work(ipoib_workqueue, &priv->flush_light); 192 } 193 194 195 static int 196 ipoib_stop(struct ipoib_dev_priv *priv) 197 { 198 struct ifnet *dev = priv->dev; 199 200 ipoib_dbg(priv, "stopping interface\n"); 201 202 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 203 204 dev->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 205 206 ipoib_ib_dev_down(priv, 0); 207 ipoib_ib_dev_stop(priv, 0); 208 209 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 210 struct ipoib_dev_priv *cpriv; 211 212 /* Bring down any child interfaces too */ 213 mutex_lock(&priv->vlan_mutex); 214 list_for_each_entry(cpriv, &priv->child_intfs, list) 215 if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) != 0) 216 ipoib_stop(cpriv); 217 mutex_unlock(&priv->vlan_mutex); 218 } 219 220 return 0; 221 } 222 223 int 224 ipoib_change_mtu(struct ipoib_dev_priv *priv, int new_mtu) 225 { 226 struct ifnet *dev = priv->dev; 227 228 /* dev->if_mtu > 2K ==> connected mode */ 229 if (ipoib_cm_admin_enabled(priv)) { 230 if (new_mtu > IPOIB_CM_MTU(ipoib_cm_max_mtu(priv))) 231 return -EINVAL; 232 233 if (new_mtu > priv->mcast_mtu) 234 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", 235 priv->mcast_mtu); 236 237 dev->if_mtu = new_mtu; 238 return 0; 239 } 240 241 if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) 242 return -EINVAL; 243 244 priv->admin_mtu = new_mtu; 245 246 dev->if_mtu = min(priv->mcast_mtu, priv->admin_mtu); 247 248 queue_work(ipoib_workqueue, &priv->flush_light); 249 250 return 0; 251 } 252 253 static int 254 ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 255 { 256 struct ipoib_dev_priv *priv = ifp->if_softc; 257 struct ifaddr *ifa = (struct ifaddr *) data; 258 struct ifreq *ifr = (struct ifreq *) data; 259 int error = 0; 260 261 /* check if detaching */ 262 if (priv == NULL || priv->gone != 0) 263 return (ENXIO); 264 265 switch (command) { 266 case SIOCSIFFLAGS: 267 if (ifp->if_flags & IFF_UP) { 268 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 269 error = -ipoib_open(priv); 270 } else 271 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 272 ipoib_stop(priv); 273 break; 274 case SIOCADDMULTI: 275 case SIOCDELMULTI: 276 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 277 queue_work(ipoib_workqueue, &priv->restart_task); 278 break; 279 case SIOCSIFADDR: 280 ifp->if_flags |= IFF_UP; 281 282 switch (ifa->ifa_addr->sa_family) { 283 #ifdef INET 284 case AF_INET: 285 ifp->if_init(ifp->if_softc); /* before arpwhohas */ 286 arp_ifinit(ifp, ifa); 287 break; 288 #endif 289 default: 290 ifp->if_init(ifp->if_softc); 291 break; 292 } 293 break; 294 295 case SIOCGIFADDR: 296 { 297 struct sockaddr *sa; 298 299 sa = (struct sockaddr *) & ifr->ifr_data; 300 bcopy(IF_LLADDR(ifp), 301 (caddr_t) sa->sa_data, INFINIBAND_ALEN); 302 } 303 break; 304 305 case SIOCSIFMTU: 306 /* 307 * Set the interface MTU. 308 */ 309 error = -ipoib_change_mtu(priv, ifr->ifr_mtu); 310 break; 311 default: 312 error = EINVAL; 313 break; 314 } 315 return (error); 316 } 317 318 319 static struct ipoib_path * 320 __path_find(struct ipoib_dev_priv *priv, void *gid) 321 { 322 struct rb_node *n = priv->path_tree.rb_node; 323 struct ipoib_path *path; 324 int ret; 325 326 while (n) { 327 path = rb_entry(n, struct ipoib_path, rb_node); 328 329 ret = memcmp(gid, path->pathrec.dgid.raw, 330 sizeof (union ib_gid)); 331 332 if (ret < 0) 333 n = n->rb_left; 334 else if (ret > 0) 335 n = n->rb_right; 336 else 337 return path; 338 } 339 340 return NULL; 341 } 342 343 static int 344 __path_add(struct ipoib_dev_priv *priv, struct ipoib_path *path) 345 { 346 struct rb_node **n = &priv->path_tree.rb_node; 347 struct rb_node *pn = NULL; 348 struct ipoib_path *tpath; 349 int ret; 350 351 while (*n) { 352 pn = *n; 353 tpath = rb_entry(pn, struct ipoib_path, rb_node); 354 355 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, 356 sizeof (union ib_gid)); 357 if (ret < 0) 358 n = &pn->rb_left; 359 else if (ret > 0) 360 n = &pn->rb_right; 361 else 362 return -EEXIST; 363 } 364 365 rb_link_node(&path->rb_node, pn, n); 366 rb_insert_color(&path->rb_node, &priv->path_tree); 367 368 list_add_tail(&path->list, &priv->path_list); 369 370 return 0; 371 } 372 373 void 374 ipoib_path_free(struct ipoib_dev_priv *priv, struct ipoib_path *path) 375 { 376 377 _IF_DRAIN(&path->queue); 378 379 if (path->ah) 380 ipoib_put_ah(path->ah); 381 if (ipoib_cm_get(path)) 382 ipoib_cm_destroy_tx(ipoib_cm_get(path)); 383 384 kfree(path); 385 } 386 387 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 388 389 struct ipoib_path_iter * 390 ipoib_path_iter_init(struct ipoib_dev_priv *priv) 391 { 392 struct ipoib_path_iter *iter; 393 394 iter = kmalloc(sizeof *iter, GFP_KERNEL); 395 if (!iter) 396 return NULL; 397 398 iter->priv = priv; 399 memset(iter->path.pathrec.dgid.raw, 0, 16); 400 401 if (ipoib_path_iter_next(iter)) { 402 kfree(iter); 403 return NULL; 404 } 405 406 return iter; 407 } 408 409 int 410 ipoib_path_iter_next(struct ipoib_path_iter *iter) 411 { 412 struct ipoib_dev_priv *priv = iter->priv; 413 struct rb_node *n; 414 struct ipoib_path *path; 415 int ret = 1; 416 417 spin_lock_irq(&priv->lock); 418 419 n = rb_first(&priv->path_tree); 420 421 while (n) { 422 path = rb_entry(n, struct ipoib_path, rb_node); 423 424 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, 425 sizeof (union ib_gid)) < 0) { 426 iter->path = *path; 427 ret = 0; 428 break; 429 } 430 431 n = rb_next(n); 432 } 433 434 spin_unlock_irq(&priv->lock); 435 436 return ret; 437 } 438 439 void 440 ipoib_path_iter_read(struct ipoib_path_iter *iter, struct ipoib_path *path) 441 { 442 *path = iter->path; 443 } 444 445 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ 446 447 void 448 ipoib_mark_paths_invalid(struct ipoib_dev_priv *priv) 449 { 450 struct ipoib_path *path, *tp; 451 452 spin_lock_irq(&priv->lock); 453 454 list_for_each_entry_safe(path, tp, &priv->path_list, list) { 455 ipoib_dbg(priv, "mark path LID 0x%04x GID %16D invalid\n", 456 be16_to_cpu(path->pathrec.dlid), 457 path->pathrec.dgid.raw, ":"); 458 path->valid = 0; 459 } 460 461 spin_unlock_irq(&priv->lock); 462 } 463 464 void 465 ipoib_flush_paths(struct ipoib_dev_priv *priv) 466 { 467 struct ipoib_path *path, *tp; 468 LIST_HEAD(remove_list); 469 unsigned long flags; 470 471 spin_lock_irqsave(&priv->lock, flags); 472 473 list_splice_init(&priv->path_list, &remove_list); 474 475 list_for_each_entry(path, &remove_list, list) 476 rb_erase(&path->rb_node, &priv->path_tree); 477 478 list_for_each_entry_safe(path, tp, &remove_list, list) { 479 if (path->query) 480 ib_sa_cancel_query(path->query_id, path->query); 481 spin_unlock_irqrestore(&priv->lock, flags); 482 wait_for_completion(&path->done); 483 ipoib_path_free(priv, path); 484 spin_lock_irqsave(&priv->lock, flags); 485 } 486 487 spin_unlock_irqrestore(&priv->lock, flags); 488 } 489 490 static void 491 path_rec_completion(int status, struct ib_sa_path_rec *pathrec, void *path_ptr) 492 { 493 struct ipoib_path *path = path_ptr; 494 struct ipoib_dev_priv *priv = path->priv; 495 struct ifnet *dev = priv->dev; 496 struct ipoib_ah *ah = NULL; 497 struct ipoib_ah *old_ah = NULL; 498 struct ifqueue mbqueue; 499 struct mbuf *mb; 500 unsigned long flags; 501 502 if (!status) 503 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %16D\n", 504 be16_to_cpu(pathrec->dlid), pathrec->dgid.raw, ":"); 505 else 506 ipoib_dbg(priv, "PathRec status %d for GID %16D\n", 507 status, path->pathrec.dgid.raw, ":"); 508 509 bzero(&mbqueue, sizeof(mbqueue)); 510 511 if (!status) { 512 struct ib_ah_attr av; 513 514 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) 515 ah = ipoib_create_ah(priv, priv->pd, &av); 516 } 517 518 spin_lock_irqsave(&priv->lock, flags); 519 520 if (ah) { 521 path->pathrec = *pathrec; 522 523 old_ah = path->ah; 524 path->ah = ah; 525 526 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", 527 ah, be16_to_cpu(pathrec->dlid), pathrec->sl); 528 529 for (;;) { 530 _IF_DEQUEUE(&path->queue, mb); 531 if (mb == NULL) 532 break; 533 _IF_ENQUEUE(&mbqueue, mb); 534 } 535 536 #ifdef CONFIG_INFINIBAND_IPOIB_CM 537 if (ipoib_cm_enabled(priv, path->hwaddr) && !ipoib_cm_get(path)) 538 ipoib_cm_set(path, ipoib_cm_create_tx(priv, path)); 539 #endif 540 541 path->valid = 1; 542 } 543 544 path->query = NULL; 545 complete(&path->done); 546 547 spin_unlock_irqrestore(&priv->lock, flags); 548 549 if (old_ah) 550 ipoib_put_ah(old_ah); 551 552 for (;;) { 553 _IF_DEQUEUE(&mbqueue, mb); 554 if (mb == NULL) 555 break; 556 mb->m_pkthdr.rcvif = dev; 557 if (dev->if_transmit(dev, mb)) 558 ipoib_warn(priv, "dev_queue_xmit failed " 559 "to requeue packet\n"); 560 } 561 } 562 563 static struct ipoib_path * 564 path_rec_create(struct ipoib_dev_priv *priv, uint8_t *hwaddr) 565 { 566 struct ipoib_path *path; 567 568 if (!priv->broadcast) 569 return NULL; 570 571 path = kzalloc(sizeof *path, GFP_ATOMIC); 572 if (!path) 573 return NULL; 574 575 path->priv = priv; 576 577 bzero(&path->queue, sizeof(path->queue)); 578 579 #ifdef CONFIG_INFINIBAND_IPOIB_CM 580 memcpy(&path->hwaddr, hwaddr, INFINIBAND_ALEN); 581 #endif 582 memcpy(path->pathrec.dgid.raw, &hwaddr[4], sizeof (union ib_gid)); 583 path->pathrec.sgid = priv->local_gid; 584 path->pathrec.pkey = cpu_to_be16(priv->pkey); 585 path->pathrec.numb_path = 1; 586 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; 587 588 return path; 589 } 590 591 static int 592 path_rec_start(struct ipoib_dev_priv *priv, struct ipoib_path *path) 593 { 594 struct ifnet *dev = priv->dev; 595 596 ib_sa_comp_mask comp_mask = IB_SA_PATH_REC_MTU_SELECTOR | IB_SA_PATH_REC_MTU; 597 struct ib_sa_path_rec p_rec; 598 599 p_rec = path->pathrec; 600 p_rec.mtu_selector = IB_SA_GT; 601 602 switch (roundup_pow_of_two(dev->if_mtu + IPOIB_ENCAP_LEN)) { 603 case 512: 604 p_rec.mtu = IB_MTU_256; 605 break; 606 case 1024: 607 p_rec.mtu = IB_MTU_512; 608 break; 609 case 2048: 610 p_rec.mtu = IB_MTU_1024; 611 break; 612 case 4096: 613 p_rec.mtu = IB_MTU_2048; 614 break; 615 default: 616 /* Wildcard everything */ 617 comp_mask = 0; 618 p_rec.mtu = 0; 619 p_rec.mtu_selector = 0; 620 } 621 622 ipoib_dbg(priv, "Start path record lookup for %16D MTU > %d\n", 623 p_rec.dgid.raw, ":", 624 comp_mask ? ib_mtu_enum_to_int(p_rec.mtu) : 0); 625 626 init_completion(&path->done); 627 628 path->query_id = 629 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, 630 &p_rec, comp_mask | 631 IB_SA_PATH_REC_DGID | 632 IB_SA_PATH_REC_SGID | 633 IB_SA_PATH_REC_NUMB_PATH | 634 IB_SA_PATH_REC_TRAFFIC_CLASS | 635 IB_SA_PATH_REC_PKEY, 636 1000, GFP_ATOMIC, 637 path_rec_completion, 638 path, &path->query); 639 if (path->query_id < 0) { 640 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); 641 path->query = NULL; 642 complete(&path->done); 643 return path->query_id; 644 } 645 646 return 0; 647 } 648 649 static void 650 ipoib_unicast_send(struct mbuf *mb, struct ipoib_dev_priv *priv, struct ipoib_header *eh) 651 { 652 struct ipoib_path *path; 653 654 path = __path_find(priv, eh->hwaddr + 4); 655 if (!path || !path->valid) { 656 int new_path = 0; 657 658 if (!path) { 659 path = path_rec_create(priv, eh->hwaddr); 660 new_path = 1; 661 } 662 if (path) { 663 _IF_ENQUEUE(&path->queue, mb); 664 if (!path->query && path_rec_start(priv, path)) { 665 spin_unlock_irqrestore(&priv->lock, flags); 666 if (new_path) 667 ipoib_path_free(priv, path); 668 return; 669 } else 670 __path_add(priv, path); 671 } else { 672 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 673 m_freem(mb); 674 } 675 676 return; 677 } 678 679 if (ipoib_cm_get(path) && ipoib_cm_up(path)) { 680 ipoib_cm_send(priv, mb, ipoib_cm_get(path)); 681 } else if (path->ah) { 682 ipoib_send(priv, mb, path->ah, IPOIB_QPN(eh->hwaddr)); 683 } else if ((path->query || !path_rec_start(priv, path)) && 684 path->queue.ifq_len < IPOIB_MAX_PATH_REC_QUEUE) { 685 _IF_ENQUEUE(&path->queue, mb); 686 } else { 687 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 688 m_freem(mb); 689 } 690 } 691 692 static int 693 ipoib_send_one(struct ipoib_dev_priv *priv, struct mbuf *mb) 694 { 695 struct ipoib_header *eh; 696 697 eh = mtod(mb, struct ipoib_header *); 698 if (IPOIB_IS_MULTICAST(eh->hwaddr)) { 699 /* Add in the P_Key for multicast*/ 700 eh->hwaddr[8] = (priv->pkey >> 8) & 0xff; 701 eh->hwaddr[9] = priv->pkey & 0xff; 702 703 ipoib_mcast_send(priv, eh->hwaddr + 4, mb); 704 } else 705 ipoib_unicast_send(mb, priv, eh); 706 707 return 0; 708 } 709 710 711 static void 712 _ipoib_start(struct ifnet *dev, struct ipoib_dev_priv *priv) 713 { 714 struct mbuf *mb; 715 716 if ((dev->if_drv_flags & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) != 717 IFF_DRV_RUNNING) 718 return; 719 720 spin_lock(&priv->lock); 721 while (!IFQ_DRV_IS_EMPTY(&dev->if_snd) && 722 (dev->if_drv_flags & IFF_DRV_OACTIVE) == 0) { 723 IFQ_DRV_DEQUEUE(&dev->if_snd, mb); 724 if (mb == NULL) 725 break; 726 IPOIB_MTAP(dev, mb); 727 ipoib_send_one(priv, mb); 728 } 729 spin_unlock(&priv->lock); 730 } 731 732 static void 733 ipoib_start(struct ifnet *dev) 734 { 735 _ipoib_start(dev, dev->if_softc); 736 } 737 738 static void 739 ipoib_vlan_start(struct ifnet *dev) 740 { 741 struct ipoib_dev_priv *priv; 742 struct mbuf *mb; 743 744 priv = VLAN_COOKIE(dev); 745 if (priv != NULL) 746 return _ipoib_start(dev, priv); 747 while (!IFQ_DRV_IS_EMPTY(&dev->if_snd)) { 748 IFQ_DRV_DEQUEUE(&dev->if_snd, mb); 749 if (mb == NULL) 750 break; 751 m_freem(mb); 752 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 753 } 754 } 755 756 int 757 ipoib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port) 758 { 759 760 /* Allocate RX/TX "rings" to hold queued mbs */ 761 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, 762 GFP_KERNEL); 763 if (!priv->rx_ring) { 764 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", 765 ca->name, ipoib_recvq_size); 766 goto out; 767 } 768 769 priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, GFP_KERNEL); 770 if (!priv->tx_ring) { 771 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", 772 ca->name, ipoib_sendq_size); 773 goto out_rx_ring_cleanup; 774 } 775 memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring); 776 777 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ 778 779 if (ipoib_ib_dev_init(priv, ca, port)) 780 goto out_tx_ring_cleanup; 781 782 return 0; 783 784 out_tx_ring_cleanup: 785 kfree(priv->tx_ring); 786 787 out_rx_ring_cleanup: 788 kfree(priv->rx_ring); 789 790 out: 791 return -ENOMEM; 792 } 793 794 static void 795 ipoib_detach(struct ipoib_dev_priv *priv) 796 { 797 struct ifnet *dev; 798 799 dev = priv->dev; 800 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 801 priv->gone = 1; 802 bpfdetach(dev); 803 if_detach(dev); 804 if_free(dev); 805 } else 806 VLAN_SETCOOKIE(priv->dev, NULL); 807 808 free(priv, M_TEMP); 809 } 810 811 void 812 ipoib_dev_cleanup(struct ipoib_dev_priv *priv) 813 { 814 struct ipoib_dev_priv *cpriv, *tcpriv; 815 816 /* Delete any child interfaces first */ 817 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { 818 ipoib_dev_cleanup(cpriv); 819 ipoib_detach(cpriv); 820 } 821 822 ipoib_ib_dev_cleanup(priv); 823 824 kfree(priv->rx_ring); 825 kfree(priv->tx_ring); 826 827 priv->rx_ring = NULL; 828 priv->tx_ring = NULL; 829 } 830 831 static volatile int ipoib_unit; 832 833 static struct ipoib_dev_priv * 834 ipoib_priv_alloc(void) 835 { 836 struct ipoib_dev_priv *priv; 837 838 priv = malloc(sizeof(struct ipoib_dev_priv), M_TEMP, M_ZERO|M_WAITOK); 839 spin_lock_init(&priv->lock); 840 spin_lock_init(&priv->drain_lock); 841 mutex_init(&priv->vlan_mutex); 842 INIT_LIST_HEAD(&priv->path_list); 843 INIT_LIST_HEAD(&priv->child_intfs); 844 INIT_LIST_HEAD(&priv->dead_ahs); 845 INIT_LIST_HEAD(&priv->multicast_list); 846 INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); 847 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); 848 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); 849 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); 850 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); 851 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); 852 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); 853 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); 854 memcpy(priv->broadcastaddr, ipv4_bcast_addr, INFINIBAND_ALEN); 855 856 return (priv); 857 } 858 859 struct ipoib_dev_priv * 860 ipoib_intf_alloc(const char *name) 861 { 862 struct ipoib_dev_priv *priv; 863 struct sockaddr_dl *sdl; 864 struct ifnet *dev; 865 866 priv = ipoib_priv_alloc(); 867 dev = priv->dev = if_alloc(IFT_INFINIBAND); 868 if (!dev) { 869 free(priv, M_TEMP); 870 return NULL; 871 } 872 dev->if_softc = priv; 873 if_initname(dev, name, atomic_fetchadd_int(&ipoib_unit, 1)); 874 dev->if_flags = IFF_BROADCAST | IFF_MULTICAST; 875 dev->if_addrlen = INFINIBAND_ALEN; 876 dev->if_hdrlen = IPOIB_HEADER_LEN; 877 if_attach(dev); 878 dev->if_init = ipoib_init; 879 dev->if_ioctl = ipoib_ioctl; 880 dev->if_start = ipoib_start; 881 dev->if_output = ipoib_output; 882 dev->if_input = ipoib_input; 883 dev->if_resolvemulti = ipoib_resolvemulti; 884 dev->if_baudrate = IF_Gbps(10); 885 dev->if_broadcastaddr = priv->broadcastaddr; 886 dev->if_snd.ifq_maxlen = ipoib_sendq_size * 2; 887 sdl = (struct sockaddr_dl *)dev->if_addr->ifa_addr; 888 sdl->sdl_type = IFT_INFINIBAND; 889 sdl->sdl_alen = dev->if_addrlen; 890 priv->dev = dev; 891 if_link_state_change(dev, LINK_STATE_DOWN); 892 bpfattach(dev, DLT_EN10MB, ETHER_HDR_LEN); 893 894 return dev->if_softc; 895 } 896 897 int 898 ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) 899 { 900 struct ib_device_attr *device_attr; 901 int result = -ENOMEM; 902 903 device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL); 904 if (!device_attr) { 905 printk(KERN_WARNING "%s: allocation of %zu bytes failed\n", 906 hca->name, sizeof *device_attr); 907 return result; 908 } 909 910 result = ib_query_device(hca, device_attr); 911 if (result) { 912 printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n", 913 hca->name, result); 914 kfree(device_attr); 915 return result; 916 } 917 priv->hca_caps = device_attr->device_cap_flags; 918 919 kfree(device_attr); 920 921 priv->dev->if_hwassist = 0; 922 priv->dev->if_capabilities = 0; 923 924 #ifndef CONFIG_INFINIBAND_IPOIB_CM 925 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { 926 set_bit(IPOIB_FLAG_CSUM, &priv->flags); 927 priv->dev->if_hwassist = CSUM_IP | CSUM_TCP | CSUM_UDP; 928 priv->dev->if_capabilities = IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM; 929 } 930 931 #if 0 932 if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO) { 933 priv->dev->if_capabilities |= IFCAP_TSO4; 934 priv->dev->if_hwassist |= CSUM_TSO; 935 } 936 #endif 937 #endif 938 priv->dev->if_capabilities |= 939 IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_LINKSTATE; 940 priv->dev->if_capenable = priv->dev->if_capabilities; 941 942 return 0; 943 } 944 945 946 static struct ifnet * 947 ipoib_add_port(const char *format, struct ib_device *hca, u8 port) 948 { 949 struct ipoib_dev_priv *priv; 950 struct ib_port_attr attr; 951 int result = -ENOMEM; 952 953 priv = ipoib_intf_alloc(format); 954 if (!priv) 955 goto alloc_mem_failed; 956 957 if (!ib_query_port(hca, port, &attr)) 958 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); 959 else { 960 printk(KERN_WARNING "%s: ib_query_port %d failed\n", 961 hca->name, port); 962 goto device_init_failed; 963 } 964 965 /* MTU will be reset when mcast join happens */ 966 priv->dev->if_mtu = IPOIB_UD_MTU(priv->max_ib_mtu); 967 priv->mcast_mtu = priv->admin_mtu = priv->dev->if_mtu; 968 969 result = ib_query_pkey(hca, port, 0, &priv->pkey); 970 if (result) { 971 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", 972 hca->name, port, result); 973 goto device_init_failed; 974 } 975 976 if (ipoib_set_dev_features(priv, hca)) 977 goto device_init_failed; 978 979 /* 980 * Set the full membership bit, so that we join the right 981 * broadcast group, etc. 982 */ 983 priv->pkey |= 0x8000; 984 985 priv->broadcastaddr[8] = priv->pkey >> 8; 986 priv->broadcastaddr[9] = priv->pkey & 0xff; 987 988 result = ib_query_gid(hca, port, 0, &priv->local_gid); 989 if (result) { 990 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", 991 hca->name, port, result); 992 goto device_init_failed; 993 } 994 memcpy(IF_LLADDR(priv->dev) + 4, priv->local_gid.raw, sizeof (union ib_gid)); 995 996 result = ipoib_dev_init(priv, hca, port); 997 if (result < 0) { 998 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", 999 hca->name, port, result); 1000 goto device_init_failed; 1001 } 1002 if (ipoib_cm_admin_enabled(priv)) 1003 priv->dev->if_mtu = IPOIB_CM_MTU(ipoib_cm_max_mtu(priv)); 1004 1005 INIT_IB_EVENT_HANDLER(&priv->event_handler, 1006 priv->ca, ipoib_event); 1007 result = ib_register_event_handler(&priv->event_handler); 1008 if (result < 0) { 1009 printk(KERN_WARNING "%s: ib_register_event_handler failed for " 1010 "port %d (ret = %d)\n", 1011 hca->name, port, result); 1012 goto event_failed; 1013 } 1014 if_printf(priv->dev, "Attached to %s port %d\n", hca->name, port); 1015 1016 return priv->dev; 1017 1018 event_failed: 1019 ipoib_dev_cleanup(priv); 1020 1021 device_init_failed: 1022 ipoib_detach(priv); 1023 1024 alloc_mem_failed: 1025 return ERR_PTR(result); 1026 } 1027 1028 static void 1029 ipoib_add_one(struct ib_device *device) 1030 { 1031 struct list_head *dev_list; 1032 struct ifnet *dev; 1033 struct ipoib_dev_priv *priv; 1034 int s, e, p; 1035 1036 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 1037 return; 1038 1039 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); 1040 if (!dev_list) 1041 return; 1042 1043 INIT_LIST_HEAD(dev_list); 1044 1045 if (device->node_type == RDMA_NODE_IB_SWITCH) { 1046 s = 0; 1047 e = 0; 1048 } else { 1049 s = 1; 1050 e = device->phys_port_cnt; 1051 } 1052 1053 for (p = s; p <= e; ++p) { 1054 if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND) 1055 continue; 1056 dev = ipoib_add_port("ib", device, p); 1057 if (!IS_ERR(dev)) { 1058 priv = dev->if_softc; 1059 list_add_tail(&priv->list, dev_list); 1060 } 1061 } 1062 1063 ib_set_client_data(device, &ipoib_client, dev_list); 1064 } 1065 1066 static void 1067 ipoib_remove_one(struct ib_device *device) 1068 { 1069 struct ipoib_dev_priv *priv, *tmp; 1070 struct list_head *dev_list; 1071 1072 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 1073 return; 1074 1075 dev_list = ib_get_client_data(device, &ipoib_client); 1076 1077 list_for_each_entry_safe(priv, tmp, dev_list, list) { 1078 if (rdma_port_get_link_layer(device, priv->port) != IB_LINK_LAYER_INFINIBAND) 1079 continue; 1080 1081 ipoib_stop(priv); 1082 1083 ib_unregister_event_handler(&priv->event_handler); 1084 1085 /* dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); */ 1086 1087 flush_workqueue(ipoib_workqueue); 1088 1089 ipoib_dev_cleanup(priv); 1090 ipoib_detach(priv); 1091 } 1092 1093 kfree(dev_list); 1094 } 1095 1096 static void 1097 ipoib_config_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 1098 { 1099 struct ipoib_dev_priv *parent; 1100 struct ipoib_dev_priv *priv; 1101 struct ifnet *dev; 1102 uint16_t pkey; 1103 int error; 1104 1105 if (ifp->if_type != IFT_INFINIBAND) 1106 return; 1107 dev = VLAN_DEVAT(ifp, vtag); 1108 if (dev == NULL) 1109 return; 1110 priv = NULL; 1111 error = 0; 1112 parent = ifp->if_softc; 1113 /* We only support 15 bits of pkey. */ 1114 if (vtag & 0x8000) 1115 return; 1116 pkey = vtag | 0x8000; /* Set full membership bit. */ 1117 if (pkey == parent->pkey) 1118 return; 1119 /* Check for dups */ 1120 mutex_lock(&parent->vlan_mutex); 1121 list_for_each_entry(priv, &parent->child_intfs, list) { 1122 if (priv->pkey == pkey) { 1123 priv = NULL; 1124 error = EBUSY; 1125 goto out; 1126 } 1127 } 1128 priv = ipoib_priv_alloc(); 1129 priv->dev = dev; 1130 priv->max_ib_mtu = parent->max_ib_mtu; 1131 priv->mcast_mtu = priv->admin_mtu = parent->dev->if_mtu; 1132 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags); 1133 error = ipoib_set_dev_features(priv, parent->ca); 1134 if (error) 1135 goto out; 1136 priv->pkey = pkey; 1137 priv->broadcastaddr[8] = pkey >> 8; 1138 priv->broadcastaddr[9] = pkey & 0xff; 1139 dev->if_broadcastaddr = priv->broadcastaddr; 1140 error = ipoib_dev_init(priv, parent->ca, parent->port); 1141 if (error) 1142 goto out; 1143 priv->parent = parent->dev; 1144 list_add_tail(&priv->list, &parent->child_intfs); 1145 VLAN_SETCOOKIE(dev, priv); 1146 dev->if_start = ipoib_vlan_start; 1147 dev->if_drv_flags &= ~IFF_DRV_RUNNING; 1148 dev->if_hdrlen = IPOIB_HEADER_LEN; 1149 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1150 ipoib_open(priv); 1151 mutex_unlock(&parent->vlan_mutex); 1152 return; 1153 out: 1154 mutex_unlock(&parent->vlan_mutex); 1155 if (priv) 1156 free(priv, M_TEMP); 1157 if (error) 1158 ipoib_warn(parent, 1159 "failed to initialize subinterface: device %s, port %d vtag 0x%X", 1160 parent->ca->name, parent->port, vtag); 1161 return; 1162 } 1163 1164 static void 1165 ipoib_unconfig_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 1166 { 1167 struct ipoib_dev_priv *parent; 1168 struct ipoib_dev_priv *priv; 1169 struct ifnet *dev; 1170 uint16_t pkey; 1171 1172 if (ifp->if_type != IFT_INFINIBAND) 1173 return; 1174 1175 dev = VLAN_DEVAT(ifp, vtag); 1176 if (dev) 1177 VLAN_SETCOOKIE(dev, NULL); 1178 pkey = vtag | 0x8000; 1179 parent = ifp->if_softc; 1180 mutex_lock(&parent->vlan_mutex); 1181 list_for_each_entry(priv, &parent->child_intfs, list) { 1182 if (priv->pkey == pkey) { 1183 ipoib_dev_cleanup(priv); 1184 list_del(&priv->list); 1185 break; 1186 } 1187 } 1188 mutex_unlock(&parent->vlan_mutex); 1189 } 1190 1191 eventhandler_tag ipoib_vlan_attach; 1192 eventhandler_tag ipoib_vlan_detach; 1193 1194 static int __init 1195 ipoib_init_module(void) 1196 { 1197 int ret; 1198 1199 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); 1200 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); 1201 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); 1202 1203 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); 1204 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); 1205 ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE, 1206 IPOIB_MIN_QUEUE_SIZE)); 1207 #ifdef CONFIG_INFINIBAND_IPOIB_CM 1208 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); 1209 #endif 1210 1211 ipoib_vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 1212 ipoib_config_vlan, NULL, EVENTHANDLER_PRI_FIRST); 1213 ipoib_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 1214 ipoib_unconfig_vlan, NULL, EVENTHANDLER_PRI_FIRST); 1215 1216 /* 1217 * We create our own workqueue mainly because we want to be 1218 * able to flush it when devices are being removed. We can't 1219 * use schedule_work()/flush_scheduled_work() because both 1220 * unregister_netdev() and linkwatch_event take the rtnl lock, 1221 * so flush_scheduled_work() can deadlock during device 1222 * removal. 1223 */ 1224 ipoib_workqueue = create_singlethread_workqueue("ipoib"); 1225 if (!ipoib_workqueue) { 1226 ret = -ENOMEM; 1227 goto err_fs; 1228 } 1229 1230 ib_sa_register_client(&ipoib_sa_client); 1231 1232 ret = ib_register_client(&ipoib_client); 1233 if (ret) 1234 goto err_sa; 1235 1236 return 0; 1237 1238 err_sa: 1239 ib_sa_unregister_client(&ipoib_sa_client); 1240 destroy_workqueue(ipoib_workqueue); 1241 1242 err_fs: 1243 return ret; 1244 } 1245 1246 static void __exit 1247 ipoib_cleanup_module(void) 1248 { 1249 1250 EVENTHANDLER_DEREGISTER(vlan_config, ipoib_vlan_attach); 1251 EVENTHANDLER_DEREGISTER(vlan_unconfig, ipoib_vlan_detach); 1252 ib_unregister_client(&ipoib_client); 1253 ib_sa_unregister_client(&ipoib_sa_client); 1254 destroy_workqueue(ipoib_workqueue); 1255 } 1256 1257 /* 1258 * Infiniband output routine. 1259 */ 1260 static int 1261 ipoib_output(struct ifnet *ifp, struct mbuf *m, 1262 const struct sockaddr *dst, struct route *ro) 1263 { 1264 u_char edst[INFINIBAND_ALEN]; 1265 #if defined(INET) || defined(INET6) 1266 struct llentry *lle = NULL; 1267 #endif 1268 struct ipoib_header *eh; 1269 int error = 0, is_gw = 0; 1270 short type; 1271 1272 if (ro != NULL) 1273 is_gw = (ro->ro_flags & RT_HAS_GW) != 0; 1274 #ifdef MAC 1275 error = mac_ifnet_check_transmit(ifp, m); 1276 if (error) 1277 goto bad; 1278 #endif 1279 1280 M_PROFILE(m); 1281 if (ifp->if_flags & IFF_MONITOR) { 1282 error = ENETDOWN; 1283 goto bad; 1284 } 1285 if (!((ifp->if_flags & IFF_UP) && 1286 (ifp->if_drv_flags & IFF_DRV_RUNNING))) { 1287 error = ENETDOWN; 1288 goto bad; 1289 } 1290 1291 switch (dst->sa_family) { 1292 #ifdef INET 1293 case AF_INET: 1294 if (lle != NULL && (lle->la_flags & LLE_VALID)) 1295 memcpy(edst, lle->ll_addr, sizeof(edst)); 1296 else if (m->m_flags & M_MCAST) 1297 ip_ib_mc_map(((struct sockaddr_in *)dst)->sin_addr.s_addr, ifp->if_broadcastaddr, edst); 1298 else 1299 error = arpresolve(ifp, is_gw, m, dst, edst, NULL, NULL); 1300 if (error) 1301 return (error == EWOULDBLOCK ? 0 : error); 1302 type = htons(ETHERTYPE_IP); 1303 break; 1304 case AF_ARP: 1305 { 1306 struct arphdr *ah; 1307 ah = mtod(m, struct arphdr *); 1308 ah->ar_hrd = htons(ARPHRD_INFINIBAND); 1309 1310 switch(ntohs(ah->ar_op)) { 1311 case ARPOP_REVREQUEST: 1312 case ARPOP_REVREPLY: 1313 type = htons(ETHERTYPE_REVARP); 1314 break; 1315 case ARPOP_REQUEST: 1316 case ARPOP_REPLY: 1317 default: 1318 type = htons(ETHERTYPE_ARP); 1319 break; 1320 } 1321 1322 if (m->m_flags & M_BCAST) 1323 bcopy(ifp->if_broadcastaddr, edst, INFINIBAND_ALEN); 1324 else 1325 bcopy(ar_tha(ah), edst, INFINIBAND_ALEN); 1326 1327 } 1328 break; 1329 #endif 1330 #ifdef INET6 1331 case AF_INET6: 1332 if (lle != NULL && (lle->la_flags & LLE_VALID)) 1333 memcpy(edst, lle->ll_addr, sizeof(edst)); 1334 else if (m->m_flags & M_MCAST) 1335 ipv6_ib_mc_map(&((struct sockaddr_in6 *)dst)->sin6_addr, ifp->if_broadcastaddr, edst); 1336 else 1337 error = nd6_resolve(ifp, is_gw, m, dst, edst, NULL, NULL); 1338 if (error) 1339 return error; 1340 type = htons(ETHERTYPE_IPV6); 1341 break; 1342 #endif 1343 1344 default: 1345 if_printf(ifp, "can't handle af%d\n", dst->sa_family); 1346 error = EAFNOSUPPORT; 1347 goto bad; 1348 } 1349 1350 /* 1351 * Add local net header. If no space in first mbuf, 1352 * allocate another. 1353 */ 1354 M_PREPEND(m, IPOIB_HEADER_LEN, M_NOWAIT); 1355 if (m == NULL) { 1356 error = ENOBUFS; 1357 goto bad; 1358 } 1359 eh = mtod(m, struct ipoib_header *); 1360 (void)memcpy(&eh->proto, &type, sizeof(eh->proto)); 1361 (void)memcpy(&eh->hwaddr, edst, sizeof (edst)); 1362 1363 /* 1364 * Queue message on interface, update output statistics if 1365 * successful, and start output if interface not yet active. 1366 */ 1367 return ((ifp->if_transmit)(ifp, m)); 1368 bad: 1369 if (m != NULL) 1370 m_freem(m); 1371 return (error); 1372 } 1373 1374 /* 1375 * Upper layer processing for a received Infiniband packet. 1376 */ 1377 void 1378 ipoib_demux(struct ifnet *ifp, struct mbuf *m, u_short proto) 1379 { 1380 int isr; 1381 1382 #ifdef MAC 1383 /* 1384 * Tag the mbuf with an appropriate MAC label before any other 1385 * consumers can get to it. 1386 */ 1387 mac_ifnet_create_mbuf(ifp, m); 1388 #endif 1389 /* Allow monitor mode to claim this frame, after stats are updated. */ 1390 if (ifp->if_flags & IFF_MONITOR) { 1391 if_printf(ifp, "discard frame at IFF_MONITOR\n"); 1392 m_freem(m); 1393 return; 1394 } 1395 /* 1396 * Dispatch frame to upper layer. 1397 */ 1398 switch (proto) { 1399 #ifdef INET 1400 case ETHERTYPE_IP: 1401 isr = NETISR_IP; 1402 break; 1403 1404 case ETHERTYPE_ARP: 1405 if (ifp->if_flags & IFF_NOARP) { 1406 /* Discard packet if ARP is disabled on interface */ 1407 m_freem(m); 1408 return; 1409 } 1410 isr = NETISR_ARP; 1411 break; 1412 #endif 1413 #ifdef INET6 1414 case ETHERTYPE_IPV6: 1415 isr = NETISR_IPV6; 1416 break; 1417 #endif 1418 default: 1419 goto discard; 1420 } 1421 netisr_dispatch(isr, m); 1422 return; 1423 1424 discard: 1425 m_freem(m); 1426 } 1427 1428 /* 1429 * Process a received Infiniband packet. 1430 */ 1431 static void 1432 ipoib_input(struct ifnet *ifp, struct mbuf *m) 1433 { 1434 struct ipoib_header *eh; 1435 1436 if ((ifp->if_flags & IFF_UP) == 0) { 1437 m_freem(m); 1438 return; 1439 } 1440 CURVNET_SET_QUIET(ifp->if_vnet); 1441 1442 /* Let BPF have it before we strip the header. */ 1443 IPOIB_MTAP(ifp, m); 1444 eh = mtod(m, struct ipoib_header *); 1445 /* 1446 * Reset layer specific mbuf flags to avoid confusing upper layers. 1447 * Strip off Infiniband header. 1448 */ 1449 m->m_flags &= ~M_VLANTAG; 1450 m_clrprotoflags(m); 1451 m_adj(m, IPOIB_HEADER_LEN); 1452 1453 if (IPOIB_IS_MULTICAST(eh->hwaddr)) { 1454 if (memcmp(eh->hwaddr, ifp->if_broadcastaddr, 1455 ifp->if_addrlen) == 0) 1456 m->m_flags |= M_BCAST; 1457 else 1458 m->m_flags |= M_MCAST; 1459 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 1460 } 1461 1462 ipoib_demux(ifp, m, ntohs(eh->proto)); 1463 CURVNET_RESTORE(); 1464 } 1465 1466 static int 1467 ipoib_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 1468 struct sockaddr *sa) 1469 { 1470 struct sockaddr_dl *sdl; 1471 #ifdef INET 1472 struct sockaddr_in *sin; 1473 #endif 1474 #ifdef INET6 1475 struct sockaddr_in6 *sin6; 1476 #endif 1477 u_char *e_addr; 1478 1479 switch(sa->sa_family) { 1480 case AF_LINK: 1481 /* 1482 * No mapping needed. Just check that it's a valid MC address. 1483 */ 1484 sdl = (struct sockaddr_dl *)sa; 1485 e_addr = LLADDR(sdl); 1486 if (!IPOIB_IS_MULTICAST(e_addr)) 1487 return EADDRNOTAVAIL; 1488 *llsa = NULL; 1489 return 0; 1490 1491 #ifdef INET 1492 case AF_INET: 1493 sin = (struct sockaddr_in *)sa; 1494 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 1495 return EADDRNOTAVAIL; 1496 sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND); 1497 sdl->sdl_alen = INFINIBAND_ALEN; 1498 e_addr = LLADDR(sdl); 1499 ip_ib_mc_map(sin->sin_addr.s_addr, ifp->if_broadcastaddr, 1500 e_addr); 1501 *llsa = (struct sockaddr *)sdl; 1502 return 0; 1503 #endif 1504 #ifdef INET6 1505 case AF_INET6: 1506 sin6 = (struct sockaddr_in6 *)sa; 1507 /* 1508 * An IP6 address of 0 means listen to all 1509 * of the multicast address used for IP6. 1510 * This has no meaning in ipoib. 1511 */ 1512 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 1513 return EADDRNOTAVAIL; 1514 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 1515 return EADDRNOTAVAIL; 1516 sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND); 1517 sdl->sdl_alen = INFINIBAND_ALEN; 1518 e_addr = LLADDR(sdl); 1519 ipv6_ib_mc_map(&sin6->sin6_addr, ifp->if_broadcastaddr, e_addr); 1520 *llsa = (struct sockaddr *)sdl; 1521 return 0; 1522 #endif 1523 1524 default: 1525 return EAFNOSUPPORT; 1526 } 1527 } 1528 1529 module_init(ipoib_init_module); 1530 module_exit(ipoib_cleanup_module); 1531 1532 static int 1533 ipoib_evhand(module_t mod, int event, void *arg) 1534 { 1535 return (0); 1536 } 1537 1538 static moduledata_t ipoib_mod = { 1539 .name = "ipoib", 1540 .evhand = ipoib_evhand, 1541 }; 1542 1543 DECLARE_MODULE(ipoib, ipoib_mod, SI_SUB_LAST, SI_ORDER_ANY); 1544 MODULE_DEPEND(ipoib, ibcore, 1, 1, 1); 1545 MODULE_DEPEND(ipoib, linuxkpi, 1, 1, 1); 1546