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 "ipoib.h" 38 39 static int ipoib_resolvemulti(struct ifnet *, struct sockaddr **, 40 struct sockaddr *); 41 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_arp.h> /* For ARPHRD_xxx */ 50 #include <linux/if_vlan.h> 51 #include <net/ip.h> 52 #include <net/ipv6.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 void ipoib_start(struct ifnet *dev); 91 static int ipoib_output(struct ifnet *ifp, struct mbuf *m, 92 const struct sockaddr *dst, struct route *ro); 93 static int ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data); 94 static void ipoib_input(struct ifnet *ifp, struct mbuf *m); 95 96 #define IPOIB_MTAP(_ifp, _m) \ 97 do { \ 98 if (bpf_peers_present((_ifp)->if_bpf)) { \ 99 M_ASSERTVALID(_m); \ 100 ipoib_mtap_mb((_ifp), (_m)); \ 101 } \ 102 } while (0) 103 104 static struct unrhdr *ipoib_unrhdr; 105 106 static void 107 ipoib_unrhdr_init(void *arg) 108 { 109 110 ipoib_unrhdr = new_unrhdr(0, 65535, NULL); 111 } 112 SYSINIT(ipoib_unrhdr_init, SI_SUB_KLD - 1, SI_ORDER_ANY, ipoib_unrhdr_init, NULL); 113 114 static void 115 ipoib_unrhdr_uninit(void *arg) 116 { 117 118 if (ipoib_unrhdr != NULL) { 119 struct unrhdr *hdr; 120 121 hdr = ipoib_unrhdr; 122 ipoib_unrhdr = NULL; 123 124 delete_unrhdr(hdr); 125 } 126 } 127 SYSUNINIT(ipoib_unrhdr_uninit, SI_SUB_KLD - 1, SI_ORDER_ANY, ipoib_unrhdr_uninit, NULL); 128 129 /* 130 * This is for clients that have an ipoib_header in the mbuf. 131 */ 132 static void 133 ipoib_mtap_mb(struct ifnet *ifp, struct mbuf *mb) 134 { 135 struct ipoib_header *ih; 136 struct ether_header eh; 137 138 ih = mtod(mb, struct ipoib_header *); 139 eh.ether_type = ih->proto; 140 bcopy(ih->hwaddr, &eh.ether_dhost, ETHER_ADDR_LEN); 141 bzero(&eh.ether_shost, ETHER_ADDR_LEN); 142 mb->m_data += sizeof(struct ipoib_header); 143 mb->m_len -= sizeof(struct ipoib_header); 144 bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb); 145 mb->m_data -= sizeof(struct ipoib_header); 146 mb->m_len += sizeof(struct ipoib_header); 147 } 148 149 void 150 ipoib_mtap_proto(struct ifnet *ifp, struct mbuf *mb, uint16_t proto) 151 { 152 struct ether_header eh; 153 154 eh.ether_type = proto; 155 bzero(&eh.ether_shost, ETHER_ADDR_LEN); 156 bzero(&eh.ether_dhost, ETHER_ADDR_LEN); 157 bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb); 158 } 159 160 static struct ib_client ipoib_client = { 161 .name = "ipoib", 162 .add = ipoib_add_one, 163 .remove = ipoib_remove_one 164 }; 165 166 int 167 ipoib_open(struct ipoib_dev_priv *priv) 168 { 169 struct ifnet *dev = priv->dev; 170 171 ipoib_dbg(priv, "bringing up interface\n"); 172 173 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 174 175 if (ipoib_pkey_dev_delay_open(priv)) 176 return 0; 177 178 if (ipoib_ib_dev_open(priv)) 179 goto err_disable; 180 181 if (ipoib_ib_dev_up(priv)) 182 goto err_stop; 183 184 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 185 struct ipoib_dev_priv *cpriv; 186 187 /* Bring up any child interfaces too */ 188 mutex_lock(&priv->vlan_mutex); 189 list_for_each_entry(cpriv, &priv->child_intfs, list) 190 if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) == 0) 191 ipoib_open(cpriv); 192 mutex_unlock(&priv->vlan_mutex); 193 } 194 dev->if_drv_flags |= IFF_DRV_RUNNING; 195 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 196 197 return 0; 198 199 err_stop: 200 ipoib_ib_dev_stop(priv, 1); 201 202 err_disable: 203 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 204 205 return -EINVAL; 206 } 207 208 static void 209 ipoib_init(void *arg) 210 { 211 struct ifnet *dev; 212 struct ipoib_dev_priv *priv; 213 214 priv = arg; 215 dev = priv->dev; 216 if ((dev->if_drv_flags & IFF_DRV_RUNNING) == 0) 217 ipoib_open(priv); 218 queue_work(ipoib_workqueue, &priv->flush_light); 219 } 220 221 222 static int 223 ipoib_stop(struct ipoib_dev_priv *priv) 224 { 225 struct ifnet *dev = priv->dev; 226 227 ipoib_dbg(priv, "stopping interface\n"); 228 229 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 230 231 dev->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 232 233 ipoib_ib_dev_down(priv, 0); 234 ipoib_ib_dev_stop(priv, 0); 235 236 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 237 struct ipoib_dev_priv *cpriv; 238 239 /* Bring down any child interfaces too */ 240 mutex_lock(&priv->vlan_mutex); 241 list_for_each_entry(cpriv, &priv->child_intfs, list) 242 if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) != 0) 243 ipoib_stop(cpriv); 244 mutex_unlock(&priv->vlan_mutex); 245 } 246 247 return 0; 248 } 249 250 int 251 ipoib_change_mtu(struct ipoib_dev_priv *priv, int new_mtu) 252 { 253 struct ifnet *dev = priv->dev; 254 255 /* dev->if_mtu > 2K ==> connected mode */ 256 if (ipoib_cm_admin_enabled(priv)) { 257 if (new_mtu > IPOIB_CM_MTU(ipoib_cm_max_mtu(priv))) 258 return -EINVAL; 259 260 if (new_mtu > priv->mcast_mtu) 261 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", 262 priv->mcast_mtu); 263 264 dev->if_mtu = new_mtu; 265 return 0; 266 } 267 268 if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) 269 return -EINVAL; 270 271 priv->admin_mtu = new_mtu; 272 273 dev->if_mtu = min(priv->mcast_mtu, priv->admin_mtu); 274 275 queue_work(ipoib_workqueue, &priv->flush_light); 276 277 return 0; 278 } 279 280 static int 281 ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 282 { 283 struct ipoib_dev_priv *priv = ifp->if_softc; 284 struct ifaddr *ifa = (struct ifaddr *) data; 285 struct ifreq *ifr = (struct ifreq *) data; 286 int error = 0; 287 288 /* check if detaching */ 289 if (priv == NULL || priv->gone != 0) 290 return (ENXIO); 291 292 switch (command) { 293 case SIOCSIFFLAGS: 294 if (ifp->if_flags & IFF_UP) { 295 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 296 error = -ipoib_open(priv); 297 } else 298 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 299 ipoib_stop(priv); 300 break; 301 case SIOCADDMULTI: 302 case SIOCDELMULTI: 303 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 304 queue_work(ipoib_workqueue, &priv->restart_task); 305 break; 306 case SIOCSIFADDR: 307 ifp->if_flags |= IFF_UP; 308 309 switch (ifa->ifa_addr->sa_family) { 310 #ifdef INET 311 case AF_INET: 312 ifp->if_init(ifp->if_softc); /* before arpwhohas */ 313 arp_ifinit(ifp, ifa); 314 break; 315 #endif 316 default: 317 ifp->if_init(ifp->if_softc); 318 break; 319 } 320 break; 321 322 case SIOCGIFADDR: 323 bcopy(IF_LLADDR(ifp), &ifr->ifr_addr.sa_data[0], 324 INFINIBAND_ALEN); 325 break; 326 327 case SIOCSIFMTU: 328 /* 329 * Set the interface MTU. 330 */ 331 error = -ipoib_change_mtu(priv, ifr->ifr_mtu); 332 break; 333 default: 334 error = EINVAL; 335 break; 336 } 337 return (error); 338 } 339 340 341 static struct ipoib_path * 342 __path_find(struct ipoib_dev_priv *priv, void *gid) 343 { 344 struct rb_node *n = priv->path_tree.rb_node; 345 struct ipoib_path *path; 346 int ret; 347 348 while (n) { 349 path = rb_entry(n, struct ipoib_path, rb_node); 350 351 ret = memcmp(gid, path->pathrec.dgid.raw, 352 sizeof (union ib_gid)); 353 354 if (ret < 0) 355 n = n->rb_left; 356 else if (ret > 0) 357 n = n->rb_right; 358 else 359 return path; 360 } 361 362 return NULL; 363 } 364 365 static int 366 __path_add(struct ipoib_dev_priv *priv, struct ipoib_path *path) 367 { 368 struct rb_node **n = &priv->path_tree.rb_node; 369 struct rb_node *pn = NULL; 370 struct ipoib_path *tpath; 371 int ret; 372 373 while (*n) { 374 pn = *n; 375 tpath = rb_entry(pn, struct ipoib_path, rb_node); 376 377 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, 378 sizeof (union ib_gid)); 379 if (ret < 0) 380 n = &pn->rb_left; 381 else if (ret > 0) 382 n = &pn->rb_right; 383 else 384 return -EEXIST; 385 } 386 387 rb_link_node(&path->rb_node, pn, n); 388 rb_insert_color(&path->rb_node, &priv->path_tree); 389 390 list_add_tail(&path->list, &priv->path_list); 391 392 return 0; 393 } 394 395 void 396 ipoib_path_free(struct ipoib_dev_priv *priv, struct ipoib_path *path) 397 { 398 399 _IF_DRAIN(&path->queue); 400 401 if (path->ah) 402 ipoib_put_ah(path->ah); 403 if (ipoib_cm_get(path)) 404 ipoib_cm_destroy_tx(ipoib_cm_get(path)); 405 406 kfree(path); 407 } 408 409 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 410 411 struct ipoib_path_iter * 412 ipoib_path_iter_init(struct ipoib_dev_priv *priv) 413 { 414 struct ipoib_path_iter *iter; 415 416 iter = kmalloc(sizeof *iter, GFP_KERNEL); 417 if (!iter) 418 return NULL; 419 420 iter->priv = priv; 421 memset(iter->path.pathrec.dgid.raw, 0, 16); 422 423 if (ipoib_path_iter_next(iter)) { 424 kfree(iter); 425 return NULL; 426 } 427 428 return iter; 429 } 430 431 int 432 ipoib_path_iter_next(struct ipoib_path_iter *iter) 433 { 434 struct ipoib_dev_priv *priv = iter->priv; 435 struct rb_node *n; 436 struct ipoib_path *path; 437 int ret = 1; 438 439 spin_lock_irq(&priv->lock); 440 441 n = rb_first(&priv->path_tree); 442 443 while (n) { 444 path = rb_entry(n, struct ipoib_path, rb_node); 445 446 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, 447 sizeof (union ib_gid)) < 0) { 448 iter->path = *path; 449 ret = 0; 450 break; 451 } 452 453 n = rb_next(n); 454 } 455 456 spin_unlock_irq(&priv->lock); 457 458 return ret; 459 } 460 461 void 462 ipoib_path_iter_read(struct ipoib_path_iter *iter, struct ipoib_path *path) 463 { 464 *path = iter->path; 465 } 466 467 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ 468 469 void 470 ipoib_mark_paths_invalid(struct ipoib_dev_priv *priv) 471 { 472 struct ipoib_path *path, *tp; 473 474 spin_lock_irq(&priv->lock); 475 476 list_for_each_entry_safe(path, tp, &priv->path_list, list) { 477 ipoib_dbg(priv, "mark path LID 0x%04x GID %16D invalid\n", 478 be16_to_cpu(path->pathrec.dlid), 479 path->pathrec.dgid.raw, ":"); 480 path->valid = 0; 481 } 482 483 spin_unlock_irq(&priv->lock); 484 } 485 486 void 487 ipoib_flush_paths(struct ipoib_dev_priv *priv) 488 { 489 struct ipoib_path *path, *tp; 490 LIST_HEAD(remove_list); 491 unsigned long flags; 492 493 spin_lock_irqsave(&priv->lock, flags); 494 495 list_splice_init(&priv->path_list, &remove_list); 496 497 list_for_each_entry(path, &remove_list, list) 498 rb_erase(&path->rb_node, &priv->path_tree); 499 500 list_for_each_entry_safe(path, tp, &remove_list, list) { 501 if (path->query) 502 ib_sa_cancel_query(path->query_id, path->query); 503 spin_unlock_irqrestore(&priv->lock, flags); 504 wait_for_completion(&path->done); 505 ipoib_path_free(priv, path); 506 spin_lock_irqsave(&priv->lock, flags); 507 } 508 509 spin_unlock_irqrestore(&priv->lock, flags); 510 } 511 512 static void 513 path_rec_completion(int status, struct ib_sa_path_rec *pathrec, void *path_ptr) 514 { 515 struct ipoib_path *path = path_ptr; 516 struct ipoib_dev_priv *priv = path->priv; 517 struct ifnet *dev = priv->dev; 518 struct ipoib_ah *ah = NULL; 519 struct ipoib_ah *old_ah = NULL; 520 struct ifqueue mbqueue; 521 struct mbuf *mb; 522 unsigned long flags; 523 524 if (!status) 525 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %16D\n", 526 be16_to_cpu(pathrec->dlid), pathrec->dgid.raw, ":"); 527 else 528 ipoib_dbg(priv, "PathRec status %d for GID %16D\n", 529 status, path->pathrec.dgid.raw, ":"); 530 531 bzero(&mbqueue, sizeof(mbqueue)); 532 533 if (!status) { 534 struct ib_ah_attr av; 535 536 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) 537 ah = ipoib_create_ah(priv, priv->pd, &av); 538 } 539 540 spin_lock_irqsave(&priv->lock, flags); 541 542 if (ah) { 543 path->pathrec = *pathrec; 544 545 old_ah = path->ah; 546 path->ah = ah; 547 548 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", 549 ah, be16_to_cpu(pathrec->dlid), pathrec->sl); 550 551 for (;;) { 552 _IF_DEQUEUE(&path->queue, mb); 553 if (mb == NULL) 554 break; 555 _IF_ENQUEUE(&mbqueue, mb); 556 } 557 558 #ifdef CONFIG_INFINIBAND_IPOIB_CM 559 if (ipoib_cm_enabled(priv, path->hwaddr) && !ipoib_cm_get(path)) 560 ipoib_cm_set(path, ipoib_cm_create_tx(priv, path)); 561 #endif 562 563 path->valid = 1; 564 } 565 566 path->query = NULL; 567 complete(&path->done); 568 569 spin_unlock_irqrestore(&priv->lock, flags); 570 571 if (old_ah) 572 ipoib_put_ah(old_ah); 573 574 for (;;) { 575 _IF_DEQUEUE(&mbqueue, mb); 576 if (mb == NULL) 577 break; 578 mb->m_pkthdr.rcvif = dev; 579 if (dev->if_transmit(dev, mb)) 580 ipoib_warn(priv, "dev_queue_xmit failed " 581 "to requeue packet\n"); 582 } 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 struct ifnet *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(dev->if_mtu + 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 spin_unlock_irqrestore(&priv->lock, flags); 694 if (new_path) 695 ipoib_path_free(priv, path); 696 return; 697 } else 698 __path_add(priv, path); 699 } else { 700 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 701 m_freem(mb); 702 } 703 704 return; 705 } 706 707 if (ipoib_cm_get(path) && ipoib_cm_up(path)) { 708 ipoib_cm_send(priv, mb, ipoib_cm_get(path)); 709 } else if (path->ah) { 710 ipoib_send(priv, mb, path->ah, IPOIB_QPN(eh->hwaddr)); 711 } else if ((path->query || !path_rec_start(priv, path)) && 712 path->queue.ifq_len < IPOIB_MAX_PATH_REC_QUEUE) { 713 _IF_ENQUEUE(&path->queue, mb); 714 } else { 715 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 716 m_freem(mb); 717 } 718 } 719 720 static int 721 ipoib_send_one(struct ipoib_dev_priv *priv, struct mbuf *mb) 722 { 723 struct ipoib_header *eh; 724 725 eh = mtod(mb, struct ipoib_header *); 726 if (IPOIB_IS_MULTICAST(eh->hwaddr)) { 727 /* Add in the P_Key for multicast*/ 728 eh->hwaddr[8] = (priv->pkey >> 8) & 0xff; 729 eh->hwaddr[9] = priv->pkey & 0xff; 730 731 ipoib_mcast_send(priv, eh->hwaddr + 4, mb); 732 } else 733 ipoib_unicast_send(mb, priv, eh); 734 735 return 0; 736 } 737 738 739 static void 740 _ipoib_start(struct ifnet *dev, struct ipoib_dev_priv *priv) 741 { 742 struct mbuf *mb; 743 744 if ((dev->if_drv_flags & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) != 745 IFF_DRV_RUNNING) 746 return; 747 748 spin_lock(&priv->lock); 749 while (!IFQ_DRV_IS_EMPTY(&dev->if_snd) && 750 (dev->if_drv_flags & IFF_DRV_OACTIVE) == 0) { 751 IFQ_DRV_DEQUEUE(&dev->if_snd, mb); 752 if (mb == NULL) 753 break; 754 IPOIB_MTAP(dev, mb); 755 ipoib_send_one(priv, mb); 756 } 757 spin_unlock(&priv->lock); 758 } 759 760 static void 761 ipoib_start(struct ifnet *dev) 762 { 763 _ipoib_start(dev, dev->if_softc); 764 } 765 766 static void 767 ipoib_vlan_start(struct ifnet *dev) 768 { 769 struct ipoib_dev_priv *priv; 770 struct mbuf *mb; 771 772 priv = VLAN_COOKIE(dev); 773 if (priv != NULL) 774 return _ipoib_start(dev, priv); 775 while (!IFQ_DRV_IS_EMPTY(&dev->if_snd)) { 776 IFQ_DRV_DEQUEUE(&dev->if_snd, mb); 777 if (mb == NULL) 778 break; 779 m_freem(mb); 780 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 781 } 782 } 783 784 int 785 ipoib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port) 786 { 787 788 /* Allocate RX/TX "rings" to hold queued mbs */ 789 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, 790 GFP_KERNEL); 791 if (!priv->rx_ring) { 792 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", 793 ca->name, ipoib_recvq_size); 794 goto out; 795 } 796 797 priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, GFP_KERNEL); 798 if (!priv->tx_ring) { 799 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", 800 ca->name, ipoib_sendq_size); 801 goto out_rx_ring_cleanup; 802 } 803 memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring); 804 805 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ 806 807 if (ipoib_ib_dev_init(priv, ca, port)) 808 goto out_tx_ring_cleanup; 809 810 return 0; 811 812 out_tx_ring_cleanup: 813 kfree(priv->tx_ring); 814 815 out_rx_ring_cleanup: 816 kfree(priv->rx_ring); 817 818 out: 819 return -ENOMEM; 820 } 821 822 static void 823 ipoib_detach(struct ipoib_dev_priv *priv) 824 { 825 struct ifnet *dev; 826 827 dev = priv->dev; 828 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 829 priv->gone = 1; 830 bpfdetach(dev); 831 if_detach(dev); 832 if_free(dev); 833 free_unr(ipoib_unrhdr, priv->unit); 834 } else 835 VLAN_SETCOOKIE(priv->dev, NULL); 836 837 free(priv, M_TEMP); 838 } 839 840 void 841 ipoib_dev_cleanup(struct ipoib_dev_priv *priv) 842 { 843 struct ipoib_dev_priv *cpriv, *tcpriv; 844 845 /* Delete any child interfaces first */ 846 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { 847 ipoib_dev_cleanup(cpriv); 848 ipoib_detach(cpriv); 849 } 850 851 ipoib_ib_dev_cleanup(priv); 852 853 kfree(priv->rx_ring); 854 kfree(priv->tx_ring); 855 856 priv->rx_ring = NULL; 857 priv->tx_ring = NULL; 858 } 859 860 static struct ipoib_dev_priv * 861 ipoib_priv_alloc(void) 862 { 863 struct ipoib_dev_priv *priv; 864 865 priv = malloc(sizeof(struct ipoib_dev_priv), M_TEMP, M_ZERO|M_WAITOK); 866 spin_lock_init(&priv->lock); 867 spin_lock_init(&priv->drain_lock); 868 mutex_init(&priv->vlan_mutex); 869 INIT_LIST_HEAD(&priv->path_list); 870 INIT_LIST_HEAD(&priv->child_intfs); 871 INIT_LIST_HEAD(&priv->dead_ahs); 872 INIT_LIST_HEAD(&priv->multicast_list); 873 INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); 874 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); 875 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); 876 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); 877 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); 878 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); 879 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); 880 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); 881 memcpy(priv->broadcastaddr, ipv4_bcast_addr, INFINIBAND_ALEN); 882 883 return (priv); 884 } 885 886 struct ipoib_dev_priv * 887 ipoib_intf_alloc(const char *name) 888 { 889 struct ipoib_dev_priv *priv; 890 struct sockaddr_dl *sdl; 891 struct ifnet *dev; 892 893 priv = ipoib_priv_alloc(); 894 dev = priv->dev = if_alloc(IFT_INFINIBAND); 895 if (!dev) { 896 free(priv, M_TEMP); 897 return NULL; 898 } 899 dev->if_softc = priv; 900 priv->unit = alloc_unr(ipoib_unrhdr); 901 if (priv->unit == -1) { 902 if_free(dev); 903 free(priv, M_TEMP); 904 return NULL; 905 } 906 if_initname(dev, name, priv->unit); 907 dev->if_flags = IFF_BROADCAST | IFF_MULTICAST; 908 dev->if_addrlen = INFINIBAND_ALEN; 909 dev->if_hdrlen = IPOIB_HEADER_LEN; 910 if_attach(dev); 911 dev->if_init = ipoib_init; 912 dev->if_ioctl = ipoib_ioctl; 913 dev->if_start = ipoib_start; 914 dev->if_output = ipoib_output; 915 dev->if_input = ipoib_input; 916 dev->if_resolvemulti = ipoib_resolvemulti; 917 dev->if_baudrate = IF_Gbps(10); 918 dev->if_broadcastaddr = priv->broadcastaddr; 919 dev->if_snd.ifq_maxlen = ipoib_sendq_size * 2; 920 sdl = (struct sockaddr_dl *)dev->if_addr->ifa_addr; 921 sdl->sdl_type = IFT_INFINIBAND; 922 sdl->sdl_alen = dev->if_addrlen; 923 priv->dev = dev; 924 if_link_state_change(dev, LINK_STATE_DOWN); 925 bpfattach(dev, DLT_EN10MB, ETHER_HDR_LEN); 926 927 return dev->if_softc; 928 } 929 930 int 931 ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) 932 { 933 struct ib_device_attr *device_attr = &hca->attrs; 934 935 priv->hca_caps = device_attr->device_cap_flags; 936 937 priv->dev->if_hwassist = 0; 938 priv->dev->if_capabilities = 0; 939 940 #ifndef CONFIG_INFINIBAND_IPOIB_CM 941 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { 942 set_bit(IPOIB_FLAG_CSUM, &priv->flags); 943 priv->dev->if_hwassist = CSUM_IP | CSUM_TCP | CSUM_UDP; 944 priv->dev->if_capabilities = IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM; 945 } 946 947 #if 0 948 if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO) { 949 priv->dev->if_capabilities |= IFCAP_TSO4; 950 priv->dev->if_hwassist |= CSUM_TSO; 951 } 952 #endif 953 #endif 954 priv->dev->if_capabilities |= 955 IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_LINKSTATE; 956 priv->dev->if_capenable = priv->dev->if_capabilities; 957 958 return 0; 959 } 960 961 962 static struct ifnet * 963 ipoib_add_port(const char *format, struct ib_device *hca, u8 port) 964 { 965 struct ipoib_dev_priv *priv; 966 struct ib_port_attr attr; 967 int result = -ENOMEM; 968 969 priv = ipoib_intf_alloc(format); 970 if (!priv) 971 goto alloc_mem_failed; 972 973 if (!ib_query_port(hca, port, &attr)) 974 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); 975 else { 976 printk(KERN_WARNING "%s: ib_query_port %d failed\n", 977 hca->name, port); 978 goto device_init_failed; 979 } 980 981 /* MTU will be reset when mcast join happens */ 982 priv->dev->if_mtu = IPOIB_UD_MTU(priv->max_ib_mtu); 983 priv->mcast_mtu = priv->admin_mtu = priv->dev->if_mtu; 984 985 result = ib_query_pkey(hca, port, 0, &priv->pkey); 986 if (result) { 987 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", 988 hca->name, port, result); 989 goto device_init_failed; 990 } 991 992 if (ipoib_set_dev_features(priv, hca)) 993 goto device_init_failed; 994 995 /* 996 * Set the full membership bit, so that we join the right 997 * broadcast group, etc. 998 */ 999 priv->pkey |= 0x8000; 1000 1001 priv->broadcastaddr[8] = priv->pkey >> 8; 1002 priv->broadcastaddr[9] = priv->pkey & 0xff; 1003 1004 result = ib_query_gid(hca, port, 0, &priv->local_gid, NULL); 1005 if (result) { 1006 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", 1007 hca->name, port, result); 1008 goto device_init_failed; 1009 } 1010 memcpy(IF_LLADDR(priv->dev) + 4, priv->local_gid.raw, sizeof (union ib_gid)); 1011 1012 result = ipoib_dev_init(priv, hca, port); 1013 if (result < 0) { 1014 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", 1015 hca->name, port, result); 1016 goto device_init_failed; 1017 } 1018 if (ipoib_cm_admin_enabled(priv)) 1019 priv->dev->if_mtu = IPOIB_CM_MTU(ipoib_cm_max_mtu(priv)); 1020 1021 INIT_IB_EVENT_HANDLER(&priv->event_handler, 1022 priv->ca, ipoib_event); 1023 result = ib_register_event_handler(&priv->event_handler); 1024 if (result < 0) { 1025 printk(KERN_WARNING "%s: ib_register_event_handler failed for " 1026 "port %d (ret = %d)\n", 1027 hca->name, port, result); 1028 goto event_failed; 1029 } 1030 if_printf(priv->dev, "Attached to %s port %d\n", hca->name, port); 1031 1032 return priv->dev; 1033 1034 event_failed: 1035 ipoib_dev_cleanup(priv); 1036 1037 device_init_failed: 1038 ipoib_detach(priv); 1039 1040 alloc_mem_failed: 1041 return ERR_PTR(result); 1042 } 1043 1044 static void 1045 ipoib_add_one(struct ib_device *device) 1046 { 1047 struct list_head *dev_list; 1048 struct ifnet *dev; 1049 struct ipoib_dev_priv *priv; 1050 int s, e, p; 1051 1052 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 1053 return; 1054 1055 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); 1056 if (!dev_list) 1057 return; 1058 1059 INIT_LIST_HEAD(dev_list); 1060 1061 if (device->node_type == RDMA_NODE_IB_SWITCH) { 1062 s = 0; 1063 e = 0; 1064 } else { 1065 s = 1; 1066 e = device->phys_port_cnt; 1067 } 1068 1069 for (p = s; p <= e; ++p) { 1070 if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND) 1071 continue; 1072 dev = ipoib_add_port("ib", device, p); 1073 if (!IS_ERR(dev)) { 1074 priv = dev->if_softc; 1075 list_add_tail(&priv->list, dev_list); 1076 } 1077 } 1078 1079 ib_set_client_data(device, &ipoib_client, dev_list); 1080 } 1081 1082 static void 1083 ipoib_remove_one(struct ib_device *device, void *client_data) 1084 { 1085 struct ipoib_dev_priv *priv, *tmp; 1086 struct list_head *dev_list = client_data; 1087 1088 if (!dev_list) 1089 return; 1090 1091 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 1092 return; 1093 1094 list_for_each_entry_safe(priv, tmp, dev_list, list) { 1095 if (rdma_port_get_link_layer(device, priv->port) != IB_LINK_LAYER_INFINIBAND) 1096 continue; 1097 1098 ipoib_stop(priv); 1099 1100 ib_unregister_event_handler(&priv->event_handler); 1101 1102 /* dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); */ 1103 1104 flush_workqueue(ipoib_workqueue); 1105 1106 ipoib_dev_cleanup(priv); 1107 ipoib_detach(priv); 1108 } 1109 1110 kfree(dev_list); 1111 } 1112 1113 static void 1114 ipoib_config_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 1115 { 1116 struct ipoib_dev_priv *parent; 1117 struct ipoib_dev_priv *priv; 1118 struct ifnet *dev; 1119 uint16_t pkey; 1120 int error; 1121 1122 if (ifp->if_type != IFT_INFINIBAND) 1123 return; 1124 dev = VLAN_DEVAT(ifp, vtag); 1125 if (dev == NULL) 1126 return; 1127 priv = NULL; 1128 error = 0; 1129 parent = ifp->if_softc; 1130 /* We only support 15 bits of pkey. */ 1131 if (vtag & 0x8000) 1132 return; 1133 pkey = vtag | 0x8000; /* Set full membership bit. */ 1134 if (pkey == parent->pkey) 1135 return; 1136 /* Check for dups */ 1137 mutex_lock(&parent->vlan_mutex); 1138 list_for_each_entry(priv, &parent->child_intfs, list) { 1139 if (priv->pkey == pkey) { 1140 priv = NULL; 1141 error = EBUSY; 1142 goto out; 1143 } 1144 } 1145 priv = ipoib_priv_alloc(); 1146 priv->dev = dev; 1147 priv->max_ib_mtu = parent->max_ib_mtu; 1148 priv->mcast_mtu = priv->admin_mtu = parent->dev->if_mtu; 1149 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags); 1150 error = ipoib_set_dev_features(priv, parent->ca); 1151 if (error) 1152 goto out; 1153 priv->pkey = pkey; 1154 priv->broadcastaddr[8] = pkey >> 8; 1155 priv->broadcastaddr[9] = pkey & 0xff; 1156 dev->if_broadcastaddr = priv->broadcastaddr; 1157 error = ipoib_dev_init(priv, parent->ca, parent->port); 1158 if (error) 1159 goto out; 1160 priv->parent = parent->dev; 1161 list_add_tail(&priv->list, &parent->child_intfs); 1162 VLAN_SETCOOKIE(dev, priv); 1163 dev->if_start = ipoib_vlan_start; 1164 dev->if_drv_flags &= ~IFF_DRV_RUNNING; 1165 dev->if_hdrlen = IPOIB_HEADER_LEN; 1166 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1167 ipoib_open(priv); 1168 mutex_unlock(&parent->vlan_mutex); 1169 return; 1170 out: 1171 mutex_unlock(&parent->vlan_mutex); 1172 if (priv) 1173 free(priv, M_TEMP); 1174 if (error) 1175 ipoib_warn(parent, 1176 "failed to initialize subinterface: device %s, port %d vtag 0x%X", 1177 parent->ca->name, parent->port, vtag); 1178 return; 1179 } 1180 1181 static void 1182 ipoib_unconfig_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 1183 { 1184 struct ipoib_dev_priv *parent; 1185 struct ipoib_dev_priv *priv; 1186 struct ifnet *dev; 1187 uint16_t pkey; 1188 1189 if (ifp->if_type != IFT_INFINIBAND) 1190 return; 1191 1192 dev = VLAN_DEVAT(ifp, vtag); 1193 if (dev) 1194 VLAN_SETCOOKIE(dev, NULL); 1195 pkey = vtag | 0x8000; 1196 parent = ifp->if_softc; 1197 mutex_lock(&parent->vlan_mutex); 1198 list_for_each_entry(priv, &parent->child_intfs, list) { 1199 if (priv->pkey == pkey) { 1200 ipoib_dev_cleanup(priv); 1201 list_del(&priv->list); 1202 break; 1203 } 1204 } 1205 mutex_unlock(&parent->vlan_mutex); 1206 } 1207 1208 eventhandler_tag ipoib_vlan_attach; 1209 eventhandler_tag ipoib_vlan_detach; 1210 1211 static int __init 1212 ipoib_init_module(void) 1213 { 1214 int ret; 1215 1216 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); 1217 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); 1218 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); 1219 1220 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); 1221 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); 1222 ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE, 1223 IPOIB_MIN_QUEUE_SIZE)); 1224 #ifdef CONFIG_INFINIBAND_IPOIB_CM 1225 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); 1226 #endif 1227 1228 ipoib_vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 1229 ipoib_config_vlan, NULL, EVENTHANDLER_PRI_FIRST); 1230 ipoib_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 1231 ipoib_unconfig_vlan, NULL, EVENTHANDLER_PRI_FIRST); 1232 1233 /* 1234 * We create our own workqueue mainly because we want to be 1235 * able to flush it when devices are being removed. We can't 1236 * use schedule_work()/flush_scheduled_work() because both 1237 * unregister_netdev() and linkwatch_event take the rtnl lock, 1238 * so flush_scheduled_work() can deadlock during device 1239 * removal. 1240 */ 1241 ipoib_workqueue = create_singlethread_workqueue("ipoib"); 1242 if (!ipoib_workqueue) { 1243 ret = -ENOMEM; 1244 goto err_fs; 1245 } 1246 1247 ib_sa_register_client(&ipoib_sa_client); 1248 1249 ret = ib_register_client(&ipoib_client); 1250 if (ret) 1251 goto err_sa; 1252 1253 return 0; 1254 1255 err_sa: 1256 ib_sa_unregister_client(&ipoib_sa_client); 1257 destroy_workqueue(ipoib_workqueue); 1258 1259 err_fs: 1260 return ret; 1261 } 1262 1263 static void __exit 1264 ipoib_cleanup_module(void) 1265 { 1266 1267 EVENTHANDLER_DEREGISTER(vlan_config, ipoib_vlan_attach); 1268 EVENTHANDLER_DEREGISTER(vlan_unconfig, ipoib_vlan_detach); 1269 ib_unregister_client(&ipoib_client); 1270 ib_sa_unregister_client(&ipoib_sa_client); 1271 destroy_workqueue(ipoib_workqueue); 1272 } 1273 1274 /* 1275 * Infiniband output routine. 1276 */ 1277 static int 1278 ipoib_output(struct ifnet *ifp, struct mbuf *m, 1279 const struct sockaddr *dst, struct route *ro) 1280 { 1281 u_char edst[INFINIBAND_ALEN]; 1282 #if defined(INET) || defined(INET6) 1283 struct llentry *lle = NULL; 1284 #endif 1285 struct ipoib_header *eh; 1286 int error = 0, is_gw = 0; 1287 short type; 1288 1289 if (ro != NULL) 1290 is_gw = (ro->ro_flags & RT_HAS_GW) != 0; 1291 #ifdef MAC 1292 error = mac_ifnet_check_transmit(ifp, m); 1293 if (error) 1294 goto bad; 1295 #endif 1296 1297 M_PROFILE(m); 1298 if (ifp->if_flags & IFF_MONITOR) { 1299 error = ENETDOWN; 1300 goto bad; 1301 } 1302 if (!((ifp->if_flags & IFF_UP) && 1303 (ifp->if_drv_flags & IFF_DRV_RUNNING))) { 1304 error = ENETDOWN; 1305 goto bad; 1306 } 1307 1308 switch (dst->sa_family) { 1309 #ifdef INET 1310 case AF_INET: 1311 if (lle != NULL && (lle->la_flags & LLE_VALID)) 1312 memcpy(edst, lle->ll_addr, sizeof(edst)); 1313 else if (m->m_flags & M_MCAST) 1314 ip_ib_mc_map(((struct sockaddr_in *)dst)->sin_addr.s_addr, ifp->if_broadcastaddr, edst); 1315 else 1316 error = arpresolve(ifp, is_gw, m, dst, edst, NULL, NULL); 1317 if (error) 1318 return (error == EWOULDBLOCK ? 0 : error); 1319 type = htons(ETHERTYPE_IP); 1320 break; 1321 case AF_ARP: 1322 { 1323 struct arphdr *ah; 1324 ah = mtod(m, struct arphdr *); 1325 ah->ar_hrd = htons(ARPHRD_INFINIBAND); 1326 1327 switch(ntohs(ah->ar_op)) { 1328 case ARPOP_REVREQUEST: 1329 case ARPOP_REVREPLY: 1330 type = htons(ETHERTYPE_REVARP); 1331 break; 1332 case ARPOP_REQUEST: 1333 case ARPOP_REPLY: 1334 default: 1335 type = htons(ETHERTYPE_ARP); 1336 break; 1337 } 1338 1339 if (m->m_flags & M_BCAST) 1340 bcopy(ifp->if_broadcastaddr, edst, INFINIBAND_ALEN); 1341 else 1342 bcopy(ar_tha(ah), edst, INFINIBAND_ALEN); 1343 1344 } 1345 break; 1346 #endif 1347 #ifdef INET6 1348 case AF_INET6: 1349 if (lle != NULL && (lle->la_flags & LLE_VALID)) 1350 memcpy(edst, lle->ll_addr, sizeof(edst)); 1351 else if (m->m_flags & M_MCAST) 1352 ipv6_ib_mc_map(&((struct sockaddr_in6 *)dst)->sin6_addr, ifp->if_broadcastaddr, edst); 1353 else 1354 error = nd6_resolve(ifp, is_gw, m, dst, edst, NULL, NULL); 1355 if (error) 1356 return error; 1357 type = htons(ETHERTYPE_IPV6); 1358 break; 1359 #endif 1360 1361 default: 1362 if_printf(ifp, "can't handle af%d\n", dst->sa_family); 1363 error = EAFNOSUPPORT; 1364 goto bad; 1365 } 1366 1367 /* 1368 * Add local net header. If no space in first mbuf, 1369 * allocate another. 1370 */ 1371 M_PREPEND(m, IPOIB_HEADER_LEN, M_NOWAIT); 1372 if (m == NULL) { 1373 error = ENOBUFS; 1374 goto bad; 1375 } 1376 eh = mtod(m, struct ipoib_header *); 1377 (void)memcpy(&eh->proto, &type, sizeof(eh->proto)); 1378 (void)memcpy(&eh->hwaddr, edst, sizeof (edst)); 1379 1380 /* 1381 * Queue message on interface, update output statistics if 1382 * successful, and start output if interface not yet active. 1383 */ 1384 return ((ifp->if_transmit)(ifp, m)); 1385 bad: 1386 if (m != NULL) 1387 m_freem(m); 1388 return (error); 1389 } 1390 1391 /* 1392 * Upper layer processing for a received Infiniband packet. 1393 */ 1394 void 1395 ipoib_demux(struct ifnet *ifp, struct mbuf *m, u_short proto) 1396 { 1397 int isr; 1398 1399 #ifdef MAC 1400 /* 1401 * Tag the mbuf with an appropriate MAC label before any other 1402 * consumers can get to it. 1403 */ 1404 mac_ifnet_create_mbuf(ifp, m); 1405 #endif 1406 /* Allow monitor mode to claim this frame, after stats are updated. */ 1407 if (ifp->if_flags & IFF_MONITOR) { 1408 if_printf(ifp, "discard frame at IFF_MONITOR\n"); 1409 m_freem(m); 1410 return; 1411 } 1412 /* 1413 * Dispatch frame to upper layer. 1414 */ 1415 switch (proto) { 1416 #ifdef INET 1417 case ETHERTYPE_IP: 1418 isr = NETISR_IP; 1419 break; 1420 1421 case ETHERTYPE_ARP: 1422 if (ifp->if_flags & IFF_NOARP) { 1423 /* Discard packet if ARP is disabled on interface */ 1424 m_freem(m); 1425 return; 1426 } 1427 isr = NETISR_ARP; 1428 break; 1429 #endif 1430 #ifdef INET6 1431 case ETHERTYPE_IPV6: 1432 isr = NETISR_IPV6; 1433 break; 1434 #endif 1435 default: 1436 goto discard; 1437 } 1438 netisr_dispatch(isr, m); 1439 return; 1440 1441 discard: 1442 m_freem(m); 1443 } 1444 1445 /* 1446 * Process a received Infiniband packet. 1447 */ 1448 static void 1449 ipoib_input(struct ifnet *ifp, struct mbuf *m) 1450 { 1451 struct ipoib_header *eh; 1452 1453 if ((ifp->if_flags & IFF_UP) == 0) { 1454 m_freem(m); 1455 return; 1456 } 1457 CURVNET_SET_QUIET(ifp->if_vnet); 1458 1459 /* Let BPF have it before we strip the header. */ 1460 IPOIB_MTAP(ifp, m); 1461 eh = mtod(m, struct ipoib_header *); 1462 /* 1463 * Reset layer specific mbuf flags to avoid confusing upper layers. 1464 * Strip off Infiniband header. 1465 */ 1466 m->m_flags &= ~M_VLANTAG; 1467 m_clrprotoflags(m); 1468 m_adj(m, IPOIB_HEADER_LEN); 1469 1470 if (IPOIB_IS_MULTICAST(eh->hwaddr)) { 1471 if (memcmp(eh->hwaddr, ifp->if_broadcastaddr, 1472 ifp->if_addrlen) == 0) 1473 m->m_flags |= M_BCAST; 1474 else 1475 m->m_flags |= M_MCAST; 1476 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 1477 } 1478 1479 ipoib_demux(ifp, m, ntohs(eh->proto)); 1480 CURVNET_RESTORE(); 1481 } 1482 1483 static int 1484 ipoib_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 1485 struct sockaddr *sa) 1486 { 1487 struct sockaddr_dl *sdl; 1488 #ifdef INET 1489 struct sockaddr_in *sin; 1490 #endif 1491 #ifdef INET6 1492 struct sockaddr_in6 *sin6; 1493 #endif 1494 u_char *e_addr; 1495 1496 switch(sa->sa_family) { 1497 case AF_LINK: 1498 /* 1499 * No mapping needed. Just check that it's a valid MC address. 1500 */ 1501 sdl = (struct sockaddr_dl *)sa; 1502 e_addr = LLADDR(sdl); 1503 if (!IPOIB_IS_MULTICAST(e_addr)) 1504 return EADDRNOTAVAIL; 1505 *llsa = NULL; 1506 return 0; 1507 1508 #ifdef INET 1509 case AF_INET: 1510 sin = (struct sockaddr_in *)sa; 1511 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 1512 return EADDRNOTAVAIL; 1513 sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND); 1514 sdl->sdl_alen = INFINIBAND_ALEN; 1515 e_addr = LLADDR(sdl); 1516 ip_ib_mc_map(sin->sin_addr.s_addr, ifp->if_broadcastaddr, 1517 e_addr); 1518 *llsa = (struct sockaddr *)sdl; 1519 return 0; 1520 #endif 1521 #ifdef INET6 1522 case AF_INET6: 1523 sin6 = (struct sockaddr_in6 *)sa; 1524 /* 1525 * An IP6 address of 0 means listen to all 1526 * of the multicast address used for IP6. 1527 * This has no meaning in ipoib. 1528 */ 1529 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 1530 return EADDRNOTAVAIL; 1531 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 1532 return EADDRNOTAVAIL; 1533 sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND); 1534 sdl->sdl_alen = INFINIBAND_ALEN; 1535 e_addr = LLADDR(sdl); 1536 ipv6_ib_mc_map(&sin6->sin6_addr, ifp->if_broadcastaddr, e_addr); 1537 *llsa = (struct sockaddr *)sdl; 1538 return 0; 1539 #endif 1540 1541 default: 1542 return EAFNOSUPPORT; 1543 } 1544 } 1545 1546 module_init(ipoib_init_module); 1547 module_exit(ipoib_cleanup_module); 1548 1549 static int 1550 ipoib_evhand(module_t mod, int event, void *arg) 1551 { 1552 return (0); 1553 } 1554 1555 static moduledata_t ipoib_mod = { 1556 .name = "ipoib", 1557 .evhand = ipoib_evhand, 1558 }; 1559 1560 DECLARE_MODULE(ipoib, ipoib_mod, SI_SUB_LAST, SI_ORDER_ANY); 1561 MODULE_DEPEND(ipoib, ibcore, 1, 1, 1); 1562 MODULE_DEPEND(ipoib, linuxkpi, 1, 1, 1); 1563