ipoib_main.c revision 331769
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 37static 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 52MODULE_AUTHOR("Roland Dreier"); 53MODULE_DESCRIPTION("IP-over-InfiniBand net driver"); 54MODULE_LICENSE("Dual BSD/GPL"); 55 56int ipoib_sendq_size = IPOIB_TX_RING_SIZE; 57int ipoib_recvq_size = IPOIB_RX_RING_SIZE; 58 59module_param_named(send_queue_size, ipoib_sendq_size, int, 0444); 60MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue"); 61module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444); 62MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue"); 63 64#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 65int ipoib_debug_level = 1; 66 67module_param_named(debug_level, ipoib_debug_level, int, 0644); 68MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0"); 69#endif 70 71struct ipoib_path_iter { 72 struct ipoib_dev_priv *priv; 73 struct ipoib_path path; 74}; 75 76static 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 82struct workqueue_struct *ipoib_workqueue; 83 84struct ib_sa_client ipoib_sa_client; 85 86static void ipoib_add_one(struct ib_device *device); 87static void ipoib_remove_one(struct ib_device *device, void *client_data); 88static void ipoib_start(struct ifnet *dev); 89static int ipoib_output(struct ifnet *ifp, struct mbuf *m, 90 const struct sockaddr *dst, struct route *ro); 91static int ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data); 92static void ipoib_input(struct ifnet *ifp, struct mbuf *m); 93 94#define IPOIB_MTAP(_ifp, _m) \ 95do { \ 96 if (bpf_peers_present((_ifp)->if_bpf)) { \ 97 M_ASSERTVALID(_m); \ 98 ipoib_mtap_mb((_ifp), (_m)); \ 99 } \ 100} while (0) 101 102static struct unrhdr *ipoib_unrhdr; 103 104static void 105ipoib_unrhdr_init(void *arg) 106{ 107 108 ipoib_unrhdr = new_unrhdr(0, 65535, NULL); 109} 110SYSINIT(ipoib_unrhdr_init, SI_SUB_KLD - 1, SI_ORDER_ANY, ipoib_unrhdr_init, NULL); 111 112static void 113ipoib_unrhdr_uninit(void *arg) 114{ 115 116 if (ipoib_unrhdr != NULL) { 117 struct unrhdr *hdr; 118 119 hdr = ipoib_unrhdr; 120 ipoib_unrhdr = NULL; 121 122 delete_unrhdr(hdr); 123 } 124} 125SYSUNINIT(ipoib_unrhdr_uninit, SI_SUB_KLD - 1, SI_ORDER_ANY, ipoib_unrhdr_uninit, NULL); 126 127/* 128 * This is for clients that have an ipoib_header in the mbuf. 129 */ 130static void 131ipoib_mtap_mb(struct ifnet *ifp, struct mbuf *mb) 132{ 133 struct ipoib_header *ih; 134 struct ether_header eh; 135 136 ih = mtod(mb, struct ipoib_header *); 137 eh.ether_type = ih->proto; 138 bcopy(ih->hwaddr, &eh.ether_dhost, ETHER_ADDR_LEN); 139 bzero(&eh.ether_shost, ETHER_ADDR_LEN); 140 mb->m_data += sizeof(struct ipoib_header); 141 mb->m_len -= sizeof(struct ipoib_header); 142 bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb); 143 mb->m_data -= sizeof(struct ipoib_header); 144 mb->m_len += sizeof(struct ipoib_header); 145} 146 147void 148ipoib_mtap_proto(struct ifnet *ifp, struct mbuf *mb, uint16_t proto) 149{ 150 struct ether_header eh; 151 152 eh.ether_type = proto; 153 bzero(&eh.ether_shost, ETHER_ADDR_LEN); 154 bzero(&eh.ether_dhost, ETHER_ADDR_LEN); 155 bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb); 156} 157 158static struct ib_client ipoib_client = { 159 .name = "ipoib", 160 .add = ipoib_add_one, 161 .remove = ipoib_remove_one 162}; 163 164int 165ipoib_open(struct ipoib_dev_priv *priv) 166{ 167 struct ifnet *dev = priv->dev; 168 169 ipoib_dbg(priv, "bringing up interface\n"); 170 171 set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 172 173 if (ipoib_pkey_dev_delay_open(priv)) 174 return 0; 175 176 if (ipoib_ib_dev_open(priv)) 177 goto err_disable; 178 179 if (ipoib_ib_dev_up(priv)) 180 goto err_stop; 181 182 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 183 struct ipoib_dev_priv *cpriv; 184 185 /* Bring up any child interfaces too */ 186 mutex_lock(&priv->vlan_mutex); 187 list_for_each_entry(cpriv, &priv->child_intfs, list) 188 if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) == 0) 189 ipoib_open(cpriv); 190 mutex_unlock(&priv->vlan_mutex); 191 } 192 dev->if_drv_flags |= IFF_DRV_RUNNING; 193 dev->if_drv_flags &= ~IFF_DRV_OACTIVE; 194 195 return 0; 196 197err_stop: 198 ipoib_ib_dev_stop(priv, 1); 199 200err_disable: 201 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 202 203 return -EINVAL; 204} 205 206static void 207ipoib_init(void *arg) 208{ 209 struct ifnet *dev; 210 struct ipoib_dev_priv *priv; 211 212 priv = arg; 213 dev = priv->dev; 214 if ((dev->if_drv_flags & IFF_DRV_RUNNING) == 0) 215 ipoib_open(priv); 216 queue_work(ipoib_workqueue, &priv->flush_light); 217} 218 219 220static int 221ipoib_stop(struct ipoib_dev_priv *priv) 222{ 223 struct ifnet *dev = priv->dev; 224 225 ipoib_dbg(priv, "stopping interface\n"); 226 227 clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags); 228 229 dev->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 230 231 ipoib_ib_dev_down(priv, 0); 232 ipoib_ib_dev_stop(priv, 0); 233 234 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 235 struct ipoib_dev_priv *cpriv; 236 237 /* Bring down any child interfaces too */ 238 mutex_lock(&priv->vlan_mutex); 239 list_for_each_entry(cpriv, &priv->child_intfs, list) 240 if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) != 0) 241 ipoib_stop(cpriv); 242 mutex_unlock(&priv->vlan_mutex); 243 } 244 245 return 0; 246} 247 248int 249ipoib_change_mtu(struct ipoib_dev_priv *priv, int new_mtu) 250{ 251 struct ifnet *dev = priv->dev; 252 253 /* dev->if_mtu > 2K ==> connected mode */ 254 if (ipoib_cm_admin_enabled(priv)) { 255 if (new_mtu > IPOIB_CM_MTU(ipoib_cm_max_mtu(priv))) 256 return -EINVAL; 257 258 if (new_mtu > priv->mcast_mtu) 259 ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n", 260 priv->mcast_mtu); 261 262 dev->if_mtu = new_mtu; 263 return 0; 264 } 265 266 if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu)) 267 return -EINVAL; 268 269 priv->admin_mtu = new_mtu; 270 271 dev->if_mtu = min(priv->mcast_mtu, priv->admin_mtu); 272 273 queue_work(ipoib_workqueue, &priv->flush_light); 274 275 return 0; 276} 277 278static int 279ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 280{ 281 struct ipoib_dev_priv *priv = ifp->if_softc; 282 struct ifaddr *ifa = (struct ifaddr *) data; 283 struct ifreq *ifr = (struct ifreq *) data; 284 int error = 0; 285 286 /* check if detaching */ 287 if (priv == NULL || priv->gone != 0) 288 return (ENXIO); 289 290 switch (command) { 291 case SIOCSIFFLAGS: 292 if (ifp->if_flags & IFF_UP) { 293 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 294 error = -ipoib_open(priv); 295 } else 296 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 297 ipoib_stop(priv); 298 break; 299 case SIOCADDMULTI: 300 case SIOCDELMULTI: 301 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 302 queue_work(ipoib_workqueue, &priv->restart_task); 303 break; 304 case SIOCSIFADDR: 305 ifp->if_flags |= IFF_UP; 306 307 switch (ifa->ifa_addr->sa_family) { 308#ifdef INET 309 case AF_INET: 310 ifp->if_init(ifp->if_softc); /* before arpwhohas */ 311 arp_ifinit(ifp, ifa); 312 break; 313#endif 314 default: 315 ifp->if_init(ifp->if_softc); 316 break; 317 } 318 break; 319 320 case SIOCGIFADDR: 321 { 322 struct sockaddr *sa; 323 324 sa = (struct sockaddr *) & ifr->ifr_data; 325 bcopy(IF_LLADDR(ifp), 326 (caddr_t) sa->sa_data, INFINIBAND_ALEN); 327 } 328 break; 329 330 case SIOCSIFMTU: 331 /* 332 * Set the interface MTU. 333 */ 334 error = -ipoib_change_mtu(priv, ifr->ifr_mtu); 335 break; 336 default: 337 error = EINVAL; 338 break; 339 } 340 return (error); 341} 342 343 344static struct ipoib_path * 345__path_find(struct ipoib_dev_priv *priv, void *gid) 346{ 347 struct rb_node *n = priv->path_tree.rb_node; 348 struct ipoib_path *path; 349 int ret; 350 351 while (n) { 352 path = rb_entry(n, struct ipoib_path, rb_node); 353 354 ret = memcmp(gid, path->pathrec.dgid.raw, 355 sizeof (union ib_gid)); 356 357 if (ret < 0) 358 n = n->rb_left; 359 else if (ret > 0) 360 n = n->rb_right; 361 else 362 return path; 363 } 364 365 return NULL; 366} 367 368static int 369__path_add(struct ipoib_dev_priv *priv, struct ipoib_path *path) 370{ 371 struct rb_node **n = &priv->path_tree.rb_node; 372 struct rb_node *pn = NULL; 373 struct ipoib_path *tpath; 374 int ret; 375 376 while (*n) { 377 pn = *n; 378 tpath = rb_entry(pn, struct ipoib_path, rb_node); 379 380 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw, 381 sizeof (union ib_gid)); 382 if (ret < 0) 383 n = &pn->rb_left; 384 else if (ret > 0) 385 n = &pn->rb_right; 386 else 387 return -EEXIST; 388 } 389 390 rb_link_node(&path->rb_node, pn, n); 391 rb_insert_color(&path->rb_node, &priv->path_tree); 392 393 list_add_tail(&path->list, &priv->path_list); 394 395 return 0; 396} 397 398void 399ipoib_path_free(struct ipoib_dev_priv *priv, struct ipoib_path *path) 400{ 401 402 _IF_DRAIN(&path->queue); 403 404 if (path->ah) 405 ipoib_put_ah(path->ah); 406 if (ipoib_cm_get(path)) 407 ipoib_cm_destroy_tx(ipoib_cm_get(path)); 408 409 kfree(path); 410} 411 412#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG 413 414struct ipoib_path_iter * 415ipoib_path_iter_init(struct ipoib_dev_priv *priv) 416{ 417 struct ipoib_path_iter *iter; 418 419 iter = kmalloc(sizeof *iter, GFP_KERNEL); 420 if (!iter) 421 return NULL; 422 423 iter->priv = priv; 424 memset(iter->path.pathrec.dgid.raw, 0, 16); 425 426 if (ipoib_path_iter_next(iter)) { 427 kfree(iter); 428 return NULL; 429 } 430 431 return iter; 432} 433 434int 435ipoib_path_iter_next(struct ipoib_path_iter *iter) 436{ 437 struct ipoib_dev_priv *priv = iter->priv; 438 struct rb_node *n; 439 struct ipoib_path *path; 440 int ret = 1; 441 442 spin_lock_irq(&priv->lock); 443 444 n = rb_first(&priv->path_tree); 445 446 while (n) { 447 path = rb_entry(n, struct ipoib_path, rb_node); 448 449 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw, 450 sizeof (union ib_gid)) < 0) { 451 iter->path = *path; 452 ret = 0; 453 break; 454 } 455 456 n = rb_next(n); 457 } 458 459 spin_unlock_irq(&priv->lock); 460 461 return ret; 462} 463 464void 465ipoib_path_iter_read(struct ipoib_path_iter *iter, struct ipoib_path *path) 466{ 467 *path = iter->path; 468} 469 470#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */ 471 472void 473ipoib_mark_paths_invalid(struct ipoib_dev_priv *priv) 474{ 475 struct ipoib_path *path, *tp; 476 477 spin_lock_irq(&priv->lock); 478 479 list_for_each_entry_safe(path, tp, &priv->path_list, list) { 480 ipoib_dbg(priv, "mark path LID 0x%04x GID %16D invalid\n", 481 be16_to_cpu(path->pathrec.dlid), 482 path->pathrec.dgid.raw, ":"); 483 path->valid = 0; 484 } 485 486 spin_unlock_irq(&priv->lock); 487} 488 489void 490ipoib_flush_paths(struct ipoib_dev_priv *priv) 491{ 492 struct ipoib_path *path, *tp; 493 LIST_HEAD(remove_list); 494 unsigned long flags; 495 496 spin_lock_irqsave(&priv->lock, flags); 497 498 list_splice_init(&priv->path_list, &remove_list); 499 500 list_for_each_entry(path, &remove_list, list) 501 rb_erase(&path->rb_node, &priv->path_tree); 502 503 list_for_each_entry_safe(path, tp, &remove_list, list) { 504 if (path->query) 505 ib_sa_cancel_query(path->query_id, path->query); 506 spin_unlock_irqrestore(&priv->lock, flags); 507 wait_for_completion(&path->done); 508 ipoib_path_free(priv, path); 509 spin_lock_irqsave(&priv->lock, flags); 510 } 511 512 spin_unlock_irqrestore(&priv->lock, flags); 513} 514 515static void 516path_rec_completion(int status, struct ib_sa_path_rec *pathrec, void *path_ptr) 517{ 518 struct ipoib_path *path = path_ptr; 519 struct ipoib_dev_priv *priv = path->priv; 520 struct ifnet *dev = priv->dev; 521 struct ipoib_ah *ah = NULL; 522 struct ipoib_ah *old_ah = NULL; 523 struct ifqueue mbqueue; 524 struct mbuf *mb; 525 unsigned long flags; 526 527 if (!status) 528 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %16D\n", 529 be16_to_cpu(pathrec->dlid), pathrec->dgid.raw, ":"); 530 else 531 ipoib_dbg(priv, "PathRec status %d for GID %16D\n", 532 status, path->pathrec.dgid.raw, ":"); 533 534 bzero(&mbqueue, sizeof(mbqueue)); 535 536 if (!status) { 537 struct ib_ah_attr av; 538 539 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av)) 540 ah = ipoib_create_ah(priv, priv->pd, &av); 541 } 542 543 spin_lock_irqsave(&priv->lock, flags); 544 545 if (ah) { 546 path->pathrec = *pathrec; 547 548 old_ah = path->ah; 549 path->ah = ah; 550 551 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n", 552 ah, be16_to_cpu(pathrec->dlid), pathrec->sl); 553 554 for (;;) { 555 _IF_DEQUEUE(&path->queue, mb); 556 if (mb == NULL) 557 break; 558 _IF_ENQUEUE(&mbqueue, mb); 559 } 560 561#ifdef CONFIG_INFINIBAND_IPOIB_CM 562 if (ipoib_cm_enabled(priv, path->hwaddr) && !ipoib_cm_get(path)) 563 ipoib_cm_set(path, ipoib_cm_create_tx(priv, path)); 564#endif 565 566 path->valid = 1; 567 } 568 569 path->query = NULL; 570 complete(&path->done); 571 572 spin_unlock_irqrestore(&priv->lock, flags); 573 574 if (old_ah) 575 ipoib_put_ah(old_ah); 576 577 for (;;) { 578 _IF_DEQUEUE(&mbqueue, mb); 579 if (mb == NULL) 580 break; 581 mb->m_pkthdr.rcvif = dev; 582 if (dev->if_transmit(dev, mb)) 583 ipoib_warn(priv, "dev_queue_xmit failed " 584 "to requeue packet\n"); 585 } 586} 587 588static struct ipoib_path * 589path_rec_create(struct ipoib_dev_priv *priv, uint8_t *hwaddr) 590{ 591 struct ipoib_path *path; 592 593 if (!priv->broadcast) 594 return NULL; 595 596 path = kzalloc(sizeof *path, GFP_ATOMIC); 597 if (!path) 598 return NULL; 599 600 path->priv = priv; 601 602 bzero(&path->queue, sizeof(path->queue)); 603 604#ifdef CONFIG_INFINIBAND_IPOIB_CM 605 memcpy(&path->hwaddr, hwaddr, INFINIBAND_ALEN); 606#endif 607 memcpy(path->pathrec.dgid.raw, &hwaddr[4], sizeof (union ib_gid)); 608 path->pathrec.sgid = priv->local_gid; 609 path->pathrec.pkey = cpu_to_be16(priv->pkey); 610 path->pathrec.numb_path = 1; 611 path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class; 612 613 return path; 614} 615 616static int 617path_rec_start(struct ipoib_dev_priv *priv, struct ipoib_path *path) 618{ 619 struct ifnet *dev = priv->dev; 620 621 ib_sa_comp_mask comp_mask = IB_SA_PATH_REC_MTU_SELECTOR | IB_SA_PATH_REC_MTU; 622 struct ib_sa_path_rec p_rec; 623 624 p_rec = path->pathrec; 625 p_rec.mtu_selector = IB_SA_GT; 626 627 switch (roundup_pow_of_two(dev->if_mtu + IPOIB_ENCAP_LEN)) { 628 case 512: 629 p_rec.mtu = IB_MTU_256; 630 break; 631 case 1024: 632 p_rec.mtu = IB_MTU_512; 633 break; 634 case 2048: 635 p_rec.mtu = IB_MTU_1024; 636 break; 637 case 4096: 638 p_rec.mtu = IB_MTU_2048; 639 break; 640 default: 641 /* Wildcard everything */ 642 comp_mask = 0; 643 p_rec.mtu = 0; 644 p_rec.mtu_selector = 0; 645 } 646 647 ipoib_dbg(priv, "Start path record lookup for %16D MTU > %d\n", 648 p_rec.dgid.raw, ":", 649 comp_mask ? ib_mtu_enum_to_int(p_rec.mtu) : 0); 650 651 init_completion(&path->done); 652 653 path->query_id = 654 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port, 655 &p_rec, comp_mask | 656 IB_SA_PATH_REC_DGID | 657 IB_SA_PATH_REC_SGID | 658 IB_SA_PATH_REC_NUMB_PATH | 659 IB_SA_PATH_REC_TRAFFIC_CLASS | 660 IB_SA_PATH_REC_PKEY, 661 1000, GFP_ATOMIC, 662 path_rec_completion, 663 path, &path->query); 664 if (path->query_id < 0) { 665 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id); 666 path->query = NULL; 667 complete(&path->done); 668 return path->query_id; 669 } 670 671 return 0; 672} 673 674static void 675ipoib_unicast_send(struct mbuf *mb, struct ipoib_dev_priv *priv, struct ipoib_header *eh) 676{ 677 struct ipoib_path *path; 678 679 path = __path_find(priv, eh->hwaddr + 4); 680 if (!path || !path->valid) { 681 int new_path = 0; 682 683 if (!path) { 684 path = path_rec_create(priv, eh->hwaddr); 685 new_path = 1; 686 } 687 if (path) { 688 if (_IF_QLEN(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE) 689 _IF_ENQUEUE(&path->queue, mb); 690 else { 691 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 692 m_freem(mb); 693 } 694 695 if (!path->query && path_rec_start(priv, path)) { 696 spin_unlock_irqrestore(&priv->lock, flags); 697 if (new_path) 698 ipoib_path_free(priv, path); 699 return; 700 } else 701 __path_add(priv, path); 702 } else { 703 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 704 m_freem(mb); 705 } 706 707 return; 708 } 709 710 if (ipoib_cm_get(path) && ipoib_cm_up(path)) { 711 ipoib_cm_send(priv, mb, ipoib_cm_get(path)); 712 } else if (path->ah) { 713 ipoib_send(priv, mb, path->ah, IPOIB_QPN(eh->hwaddr)); 714 } else if ((path->query || !path_rec_start(priv, path)) && 715 path->queue.ifq_len < IPOIB_MAX_PATH_REC_QUEUE) { 716 _IF_ENQUEUE(&path->queue, mb); 717 } else { 718 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1); 719 m_freem(mb); 720 } 721} 722 723static int 724ipoib_send_one(struct ipoib_dev_priv *priv, struct mbuf *mb) 725{ 726 struct ipoib_header *eh; 727 728 eh = mtod(mb, struct ipoib_header *); 729 if (IPOIB_IS_MULTICAST(eh->hwaddr)) { 730 /* Add in the P_Key for multicast*/ 731 eh->hwaddr[8] = (priv->pkey >> 8) & 0xff; 732 eh->hwaddr[9] = priv->pkey & 0xff; 733 734 ipoib_mcast_send(priv, eh->hwaddr + 4, mb); 735 } else 736 ipoib_unicast_send(mb, priv, eh); 737 738 return 0; 739} 740 741 742static void 743_ipoib_start(struct ifnet *dev, struct ipoib_dev_priv *priv) 744{ 745 struct mbuf *mb; 746 747 if ((dev->if_drv_flags & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) != 748 IFF_DRV_RUNNING) 749 return; 750 751 spin_lock(&priv->lock); 752 while (!IFQ_DRV_IS_EMPTY(&dev->if_snd) && 753 (dev->if_drv_flags & IFF_DRV_OACTIVE) == 0) { 754 IFQ_DRV_DEQUEUE(&dev->if_snd, mb); 755 if (mb == NULL) 756 break; 757 IPOIB_MTAP(dev, mb); 758 ipoib_send_one(priv, mb); 759 } 760 spin_unlock(&priv->lock); 761} 762 763static void 764ipoib_start(struct ifnet *dev) 765{ 766 _ipoib_start(dev, dev->if_softc); 767} 768 769static void 770ipoib_vlan_start(struct ifnet *dev) 771{ 772 struct ipoib_dev_priv *priv; 773 struct mbuf *mb; 774 775 priv = VLAN_COOKIE(dev); 776 if (priv != NULL) 777 return _ipoib_start(dev, priv); 778 while (!IFQ_DRV_IS_EMPTY(&dev->if_snd)) { 779 IFQ_DRV_DEQUEUE(&dev->if_snd, mb); 780 if (mb == NULL) 781 break; 782 m_freem(mb); 783 if_inc_counter(dev, IFCOUNTER_OERRORS, 1); 784 } 785} 786 787int 788ipoib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port) 789{ 790 791 /* Allocate RX/TX "rings" to hold queued mbs */ 792 priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring, 793 GFP_KERNEL); 794 if (!priv->rx_ring) { 795 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n", 796 ca->name, ipoib_recvq_size); 797 goto out; 798 } 799 800 priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, GFP_KERNEL); 801 if (!priv->tx_ring) { 802 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n", 803 ca->name, ipoib_sendq_size); 804 goto out_rx_ring_cleanup; 805 } 806 memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring); 807 808 /* priv->tx_head, tx_tail & tx_outstanding are already 0 */ 809 810 if (ipoib_ib_dev_init(priv, ca, port)) 811 goto out_tx_ring_cleanup; 812 813 return 0; 814 815out_tx_ring_cleanup: 816 kfree(priv->tx_ring); 817 818out_rx_ring_cleanup: 819 kfree(priv->rx_ring); 820 821out: 822 return -ENOMEM; 823} 824 825static void 826ipoib_detach(struct ipoib_dev_priv *priv) 827{ 828 struct ifnet *dev; 829 830 dev = priv->dev; 831 if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { 832 priv->gone = 1; 833 bpfdetach(dev); 834 if_detach(dev); 835 if_free(dev); 836 free_unr(ipoib_unrhdr, priv->unit); 837 } else 838 VLAN_SETCOOKIE(priv->dev, NULL); 839 840 free(priv, M_TEMP); 841} 842 843void 844ipoib_dev_cleanup(struct ipoib_dev_priv *priv) 845{ 846 struct ipoib_dev_priv *cpriv, *tcpriv; 847 848 /* Delete any child interfaces first */ 849 list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) { 850 ipoib_dev_cleanup(cpriv); 851 ipoib_detach(cpriv); 852 } 853 854 ipoib_ib_dev_cleanup(priv); 855 856 kfree(priv->rx_ring); 857 kfree(priv->tx_ring); 858 859 priv->rx_ring = NULL; 860 priv->tx_ring = NULL; 861} 862 863static struct ipoib_dev_priv * 864ipoib_priv_alloc(void) 865{ 866 struct ipoib_dev_priv *priv; 867 868 priv = malloc(sizeof(struct ipoib_dev_priv), M_TEMP, M_ZERO|M_WAITOK); 869 spin_lock_init(&priv->lock); 870 spin_lock_init(&priv->drain_lock); 871 mutex_init(&priv->vlan_mutex); 872 INIT_LIST_HEAD(&priv->path_list); 873 INIT_LIST_HEAD(&priv->child_intfs); 874 INIT_LIST_HEAD(&priv->dead_ahs); 875 INIT_LIST_HEAD(&priv->multicast_list); 876 INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll); 877 INIT_DELAYED_WORK(&priv->mcast_task, ipoib_mcast_join_task); 878 INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task); 879 INIT_WORK(&priv->flush_light, ipoib_ib_dev_flush_light); 880 INIT_WORK(&priv->flush_normal, ipoib_ib_dev_flush_normal); 881 INIT_WORK(&priv->flush_heavy, ipoib_ib_dev_flush_heavy); 882 INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task); 883 INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah); 884 memcpy(priv->broadcastaddr, ipv4_bcast_addr, INFINIBAND_ALEN); 885 886 return (priv); 887} 888 889struct ipoib_dev_priv * 890ipoib_intf_alloc(const char *name) 891{ 892 struct ipoib_dev_priv *priv; 893 struct sockaddr_dl *sdl; 894 struct ifnet *dev; 895 896 priv = ipoib_priv_alloc(); 897 dev = priv->dev = if_alloc(IFT_INFINIBAND); 898 if (!dev) { 899 free(priv, M_TEMP); 900 return NULL; 901 } 902 dev->if_softc = priv; 903 priv->unit = alloc_unr(ipoib_unrhdr); 904 if (priv->unit == -1) { 905 if_free(dev); 906 free(priv, M_TEMP); 907 return NULL; 908 } 909 if_initname(dev, name, priv->unit); 910 dev->if_flags = IFF_BROADCAST | IFF_MULTICAST; 911 dev->if_addrlen = INFINIBAND_ALEN; 912 dev->if_hdrlen = IPOIB_HEADER_LEN; 913 if_attach(dev); 914 dev->if_init = ipoib_init; 915 dev->if_ioctl = ipoib_ioctl; 916 dev->if_start = ipoib_start; 917 dev->if_output = ipoib_output; 918 dev->if_input = ipoib_input; 919 dev->if_resolvemulti = ipoib_resolvemulti; 920 dev->if_baudrate = IF_Gbps(10); 921 dev->if_broadcastaddr = priv->broadcastaddr; 922 dev->if_snd.ifq_maxlen = ipoib_sendq_size * 2; 923 sdl = (struct sockaddr_dl *)dev->if_addr->ifa_addr; 924 sdl->sdl_type = IFT_INFINIBAND; 925 sdl->sdl_alen = dev->if_addrlen; 926 priv->dev = dev; 927 if_link_state_change(dev, LINK_STATE_DOWN); 928 bpfattach(dev, DLT_EN10MB, ETHER_HDR_LEN); 929 930 return dev->if_softc; 931} 932 933int 934ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca) 935{ 936 struct ib_device_attr *device_attr = &hca->attrs; 937 938 priv->hca_caps = device_attr->device_cap_flags; 939 940 priv->dev->if_hwassist = 0; 941 priv->dev->if_capabilities = 0; 942 943#ifndef CONFIG_INFINIBAND_IPOIB_CM 944 if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) { 945 set_bit(IPOIB_FLAG_CSUM, &priv->flags); 946 priv->dev->if_hwassist = CSUM_IP | CSUM_TCP | CSUM_UDP; 947 priv->dev->if_capabilities = IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM; 948 } 949 950#if 0 951 if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO) { 952 priv->dev->if_capabilities |= IFCAP_TSO4; 953 priv->dev->if_hwassist |= CSUM_TSO; 954 } 955#endif 956#endif 957 priv->dev->if_capabilities |= 958 IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_LINKSTATE; 959 priv->dev->if_capenable = priv->dev->if_capabilities; 960 961 return 0; 962} 963 964 965static struct ifnet * 966ipoib_add_port(const char *format, struct ib_device *hca, u8 port) 967{ 968 struct ipoib_dev_priv *priv; 969 struct ib_port_attr attr; 970 int result = -ENOMEM; 971 972 priv = ipoib_intf_alloc(format); 973 if (!priv) 974 goto alloc_mem_failed; 975 976 if (!ib_query_port(hca, port, &attr)) 977 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu); 978 else { 979 printk(KERN_WARNING "%s: ib_query_port %d failed\n", 980 hca->name, port); 981 goto device_init_failed; 982 } 983 984 /* MTU will be reset when mcast join happens */ 985 priv->dev->if_mtu = IPOIB_UD_MTU(priv->max_ib_mtu); 986 priv->mcast_mtu = priv->admin_mtu = priv->dev->if_mtu; 987 988 result = ib_query_pkey(hca, port, 0, &priv->pkey); 989 if (result) { 990 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n", 991 hca->name, port, result); 992 goto device_init_failed; 993 } 994 995 if (ipoib_set_dev_features(priv, hca)) 996 goto device_init_failed; 997 998 /* 999 * Set the full membership bit, so that we join the right 1000 * broadcast group, etc. 1001 */ 1002 priv->pkey |= 0x8000; 1003 1004 priv->broadcastaddr[8] = priv->pkey >> 8; 1005 priv->broadcastaddr[9] = priv->pkey & 0xff; 1006 1007 result = ib_query_gid(hca, port, 0, &priv->local_gid, NULL); 1008 if (result) { 1009 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n", 1010 hca->name, port, result); 1011 goto device_init_failed; 1012 } 1013 memcpy(IF_LLADDR(priv->dev) + 4, priv->local_gid.raw, sizeof (union ib_gid)); 1014 1015 result = ipoib_dev_init(priv, hca, port); 1016 if (result < 0) { 1017 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n", 1018 hca->name, port, result); 1019 goto device_init_failed; 1020 } 1021 if (ipoib_cm_admin_enabled(priv)) 1022 priv->dev->if_mtu = IPOIB_CM_MTU(ipoib_cm_max_mtu(priv)); 1023 1024 INIT_IB_EVENT_HANDLER(&priv->event_handler, 1025 priv->ca, ipoib_event); 1026 result = ib_register_event_handler(&priv->event_handler); 1027 if (result < 0) { 1028 printk(KERN_WARNING "%s: ib_register_event_handler failed for " 1029 "port %d (ret = %d)\n", 1030 hca->name, port, result); 1031 goto event_failed; 1032 } 1033 if_printf(priv->dev, "Attached to %s port %d\n", hca->name, port); 1034 1035 return priv->dev; 1036 1037event_failed: 1038 ipoib_dev_cleanup(priv); 1039 1040device_init_failed: 1041 ipoib_detach(priv); 1042 1043alloc_mem_failed: 1044 return ERR_PTR(result); 1045} 1046 1047static void 1048ipoib_add_one(struct ib_device *device) 1049{ 1050 struct list_head *dev_list; 1051 struct ifnet *dev; 1052 struct ipoib_dev_priv *priv; 1053 int s, e, p; 1054 1055 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 1056 return; 1057 1058 dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL); 1059 if (!dev_list) 1060 return; 1061 1062 INIT_LIST_HEAD(dev_list); 1063 1064 if (device->node_type == RDMA_NODE_IB_SWITCH) { 1065 s = 0; 1066 e = 0; 1067 } else { 1068 s = 1; 1069 e = device->phys_port_cnt; 1070 } 1071 1072 for (p = s; p <= e; ++p) { 1073 if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND) 1074 continue; 1075 dev = ipoib_add_port("ib", device, p); 1076 if (!IS_ERR(dev)) { 1077 priv = dev->if_softc; 1078 list_add_tail(&priv->list, dev_list); 1079 } 1080 } 1081 1082 ib_set_client_data(device, &ipoib_client, dev_list); 1083} 1084 1085static void 1086ipoib_remove_one(struct ib_device *device, void *client_data) 1087{ 1088 struct ipoib_dev_priv *priv, *tmp; 1089 struct list_head *dev_list = client_data; 1090 1091 if (!dev_list) 1092 return; 1093 1094 if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) 1095 return; 1096 1097 list_for_each_entry_safe(priv, tmp, dev_list, list) { 1098 if (rdma_port_get_link_layer(device, priv->port) != IB_LINK_LAYER_INFINIBAND) 1099 continue; 1100 1101 ipoib_stop(priv); 1102 1103 ib_unregister_event_handler(&priv->event_handler); 1104 1105 /* dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); */ 1106 1107 flush_workqueue(ipoib_workqueue); 1108 1109 ipoib_dev_cleanup(priv); 1110 ipoib_detach(priv); 1111 } 1112 1113 kfree(dev_list); 1114} 1115 1116static void 1117ipoib_config_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 1118{ 1119 struct ipoib_dev_priv *parent; 1120 struct ipoib_dev_priv *priv; 1121 struct ifnet *dev; 1122 uint16_t pkey; 1123 int error; 1124 1125 if (ifp->if_type != IFT_INFINIBAND) 1126 return; 1127 dev = VLAN_DEVAT(ifp, vtag); 1128 if (dev == NULL) 1129 return; 1130 priv = NULL; 1131 error = 0; 1132 parent = ifp->if_softc; 1133 /* We only support 15 bits of pkey. */ 1134 if (vtag & 0x8000) 1135 return; 1136 pkey = vtag | 0x8000; /* Set full membership bit. */ 1137 if (pkey == parent->pkey) 1138 return; 1139 /* Check for dups */ 1140 mutex_lock(&parent->vlan_mutex); 1141 list_for_each_entry(priv, &parent->child_intfs, list) { 1142 if (priv->pkey == pkey) { 1143 priv = NULL; 1144 error = EBUSY; 1145 goto out; 1146 } 1147 } 1148 priv = ipoib_priv_alloc(); 1149 priv->dev = dev; 1150 priv->max_ib_mtu = parent->max_ib_mtu; 1151 priv->mcast_mtu = priv->admin_mtu = parent->dev->if_mtu; 1152 set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags); 1153 error = ipoib_set_dev_features(priv, parent->ca); 1154 if (error) 1155 goto out; 1156 priv->pkey = pkey; 1157 priv->broadcastaddr[8] = pkey >> 8; 1158 priv->broadcastaddr[9] = pkey & 0xff; 1159 dev->if_broadcastaddr = priv->broadcastaddr; 1160 error = ipoib_dev_init(priv, parent->ca, parent->port); 1161 if (error) 1162 goto out; 1163 priv->parent = parent->dev; 1164 list_add_tail(&priv->list, &parent->child_intfs); 1165 VLAN_SETCOOKIE(dev, priv); 1166 dev->if_start = ipoib_vlan_start; 1167 dev->if_drv_flags &= ~IFF_DRV_RUNNING; 1168 dev->if_hdrlen = IPOIB_HEADER_LEN; 1169 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1170 ipoib_open(priv); 1171 mutex_unlock(&parent->vlan_mutex); 1172 return; 1173out: 1174 mutex_unlock(&parent->vlan_mutex); 1175 if (priv) 1176 free(priv, M_TEMP); 1177 if (error) 1178 ipoib_warn(parent, 1179 "failed to initialize subinterface: device %s, port %d vtag 0x%X", 1180 parent->ca->name, parent->port, vtag); 1181 return; 1182} 1183 1184static void 1185ipoib_unconfig_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) 1186{ 1187 struct ipoib_dev_priv *parent; 1188 struct ipoib_dev_priv *priv; 1189 struct ifnet *dev; 1190 uint16_t pkey; 1191 1192 if (ifp->if_type != IFT_INFINIBAND) 1193 return; 1194 1195 dev = VLAN_DEVAT(ifp, vtag); 1196 if (dev) 1197 VLAN_SETCOOKIE(dev, NULL); 1198 pkey = vtag | 0x8000; 1199 parent = ifp->if_softc; 1200 mutex_lock(&parent->vlan_mutex); 1201 list_for_each_entry(priv, &parent->child_intfs, list) { 1202 if (priv->pkey == pkey) { 1203 ipoib_dev_cleanup(priv); 1204 list_del(&priv->list); 1205 break; 1206 } 1207 } 1208 mutex_unlock(&parent->vlan_mutex); 1209} 1210 1211eventhandler_tag ipoib_vlan_attach; 1212eventhandler_tag ipoib_vlan_detach; 1213 1214static int __init 1215ipoib_init_module(void) 1216{ 1217 int ret; 1218 1219 ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size); 1220 ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE); 1221 ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE); 1222 1223 ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size); 1224 ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE); 1225 ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE, 1226 IPOIB_MIN_QUEUE_SIZE)); 1227#ifdef CONFIG_INFINIBAND_IPOIB_CM 1228 ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP); 1229#endif 1230 1231 ipoib_vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 1232 ipoib_config_vlan, NULL, EVENTHANDLER_PRI_FIRST); 1233 ipoib_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 1234 ipoib_unconfig_vlan, NULL, EVENTHANDLER_PRI_FIRST); 1235 1236 /* 1237 * We create our own workqueue mainly because we want to be 1238 * able to flush it when devices are being removed. We can't 1239 * use schedule_work()/flush_scheduled_work() because both 1240 * unregister_netdev() and linkwatch_event take the rtnl lock, 1241 * so flush_scheduled_work() can deadlock during device 1242 * removal. 1243 */ 1244 ipoib_workqueue = create_singlethread_workqueue("ipoib"); 1245 if (!ipoib_workqueue) { 1246 ret = -ENOMEM; 1247 goto err_fs; 1248 } 1249 1250 ib_sa_register_client(&ipoib_sa_client); 1251 1252 ret = ib_register_client(&ipoib_client); 1253 if (ret) 1254 goto err_sa; 1255 1256 return 0; 1257 1258err_sa: 1259 ib_sa_unregister_client(&ipoib_sa_client); 1260 destroy_workqueue(ipoib_workqueue); 1261 1262err_fs: 1263 return ret; 1264} 1265 1266static void __exit 1267ipoib_cleanup_module(void) 1268{ 1269 1270 EVENTHANDLER_DEREGISTER(vlan_config, ipoib_vlan_attach); 1271 EVENTHANDLER_DEREGISTER(vlan_unconfig, ipoib_vlan_detach); 1272 ib_unregister_client(&ipoib_client); 1273 ib_sa_unregister_client(&ipoib_sa_client); 1274 destroy_workqueue(ipoib_workqueue); 1275} 1276 1277/* 1278 * Infiniband output routine. 1279 */ 1280static int 1281ipoib_output(struct ifnet *ifp, struct mbuf *m, 1282 const struct sockaddr *dst, struct route *ro) 1283{ 1284 u_char edst[INFINIBAND_ALEN]; 1285#if defined(INET) || defined(INET6) 1286 struct llentry *lle = NULL; 1287#endif 1288 struct ipoib_header *eh; 1289 int error = 0, is_gw = 0; 1290 short type; 1291 1292 if (ro != NULL) 1293 is_gw = (ro->ro_flags & RT_HAS_GW) != 0; 1294#ifdef MAC 1295 error = mac_ifnet_check_transmit(ifp, m); 1296 if (error) 1297 goto bad; 1298#endif 1299 1300 M_PROFILE(m); 1301 if (ifp->if_flags & IFF_MONITOR) { 1302 error = ENETDOWN; 1303 goto bad; 1304 } 1305 if (!((ifp->if_flags & IFF_UP) && 1306 (ifp->if_drv_flags & IFF_DRV_RUNNING))) { 1307 error = ENETDOWN; 1308 goto bad; 1309 } 1310 1311 switch (dst->sa_family) { 1312#ifdef INET 1313 case AF_INET: 1314 if (lle != NULL && (lle->la_flags & LLE_VALID)) 1315 memcpy(edst, lle->ll_addr, sizeof(edst)); 1316 else if (m->m_flags & M_MCAST) 1317 ip_ib_mc_map(((struct sockaddr_in *)dst)->sin_addr.s_addr, ifp->if_broadcastaddr, edst); 1318 else 1319 error = arpresolve(ifp, is_gw, m, dst, edst, NULL, NULL); 1320 if (error) 1321 return (error == EWOULDBLOCK ? 0 : error); 1322 type = htons(ETHERTYPE_IP); 1323 break; 1324 case AF_ARP: 1325 { 1326 struct arphdr *ah; 1327 ah = mtod(m, struct arphdr *); 1328 ah->ar_hrd = htons(ARPHRD_INFINIBAND); 1329 1330 switch(ntohs(ah->ar_op)) { 1331 case ARPOP_REVREQUEST: 1332 case ARPOP_REVREPLY: 1333 type = htons(ETHERTYPE_REVARP); 1334 break; 1335 case ARPOP_REQUEST: 1336 case ARPOP_REPLY: 1337 default: 1338 type = htons(ETHERTYPE_ARP); 1339 break; 1340 } 1341 1342 if (m->m_flags & M_BCAST) 1343 bcopy(ifp->if_broadcastaddr, edst, INFINIBAND_ALEN); 1344 else 1345 bcopy(ar_tha(ah), edst, INFINIBAND_ALEN); 1346 1347 } 1348 break; 1349#endif 1350#ifdef INET6 1351 case AF_INET6: 1352 if (lle != NULL && (lle->la_flags & LLE_VALID)) 1353 memcpy(edst, lle->ll_addr, sizeof(edst)); 1354 else if (m->m_flags & M_MCAST) 1355 ipv6_ib_mc_map(&((struct sockaddr_in6 *)dst)->sin6_addr, ifp->if_broadcastaddr, edst); 1356 else 1357 error = nd6_resolve(ifp, is_gw, m, dst, edst, NULL, NULL); 1358 if (error) 1359 return error; 1360 type = htons(ETHERTYPE_IPV6); 1361 break; 1362#endif 1363 1364 default: 1365 if_printf(ifp, "can't handle af%d\n", dst->sa_family); 1366 error = EAFNOSUPPORT; 1367 goto bad; 1368 } 1369 1370 /* 1371 * Add local net header. If no space in first mbuf, 1372 * allocate another. 1373 */ 1374 M_PREPEND(m, IPOIB_HEADER_LEN, M_NOWAIT); 1375 if (m == NULL) { 1376 error = ENOBUFS; 1377 goto bad; 1378 } 1379 eh = mtod(m, struct ipoib_header *); 1380 (void)memcpy(&eh->proto, &type, sizeof(eh->proto)); 1381 (void)memcpy(&eh->hwaddr, edst, sizeof (edst)); 1382 1383 /* 1384 * Queue message on interface, update output statistics if 1385 * successful, and start output if interface not yet active. 1386 */ 1387 return ((ifp->if_transmit)(ifp, m)); 1388bad: 1389 if (m != NULL) 1390 m_freem(m); 1391 return (error); 1392} 1393 1394/* 1395 * Upper layer processing for a received Infiniband packet. 1396 */ 1397void 1398ipoib_demux(struct ifnet *ifp, struct mbuf *m, u_short proto) 1399{ 1400 int isr; 1401 1402#ifdef MAC 1403 /* 1404 * Tag the mbuf with an appropriate MAC label before any other 1405 * consumers can get to it. 1406 */ 1407 mac_ifnet_create_mbuf(ifp, m); 1408#endif 1409 /* Allow monitor mode to claim this frame, after stats are updated. */ 1410 if (ifp->if_flags & IFF_MONITOR) { 1411 if_printf(ifp, "discard frame at IFF_MONITOR\n"); 1412 m_freem(m); 1413 return; 1414 } 1415 /* 1416 * Dispatch frame to upper layer. 1417 */ 1418 switch (proto) { 1419#ifdef INET 1420 case ETHERTYPE_IP: 1421 isr = NETISR_IP; 1422 break; 1423 1424 case ETHERTYPE_ARP: 1425 if (ifp->if_flags & IFF_NOARP) { 1426 /* Discard packet if ARP is disabled on interface */ 1427 m_freem(m); 1428 return; 1429 } 1430 isr = NETISR_ARP; 1431 break; 1432#endif 1433#ifdef INET6 1434 case ETHERTYPE_IPV6: 1435 isr = NETISR_IPV6; 1436 break; 1437#endif 1438 default: 1439 goto discard; 1440 } 1441 netisr_dispatch(isr, m); 1442 return; 1443 1444discard: 1445 m_freem(m); 1446} 1447 1448/* 1449 * Process a received Infiniband packet. 1450 */ 1451static void 1452ipoib_input(struct ifnet *ifp, struct mbuf *m) 1453{ 1454 struct ipoib_header *eh; 1455 1456 if ((ifp->if_flags & IFF_UP) == 0) { 1457 m_freem(m); 1458 return; 1459 } 1460 CURVNET_SET_QUIET(ifp->if_vnet); 1461 1462 /* Let BPF have it before we strip the header. */ 1463 IPOIB_MTAP(ifp, m); 1464 eh = mtod(m, struct ipoib_header *); 1465 /* 1466 * Reset layer specific mbuf flags to avoid confusing upper layers. 1467 * Strip off Infiniband header. 1468 */ 1469 m->m_flags &= ~M_VLANTAG; 1470 m_clrprotoflags(m); 1471 m_adj(m, IPOIB_HEADER_LEN); 1472 1473 if (IPOIB_IS_MULTICAST(eh->hwaddr)) { 1474 if (memcmp(eh->hwaddr, ifp->if_broadcastaddr, 1475 ifp->if_addrlen) == 0) 1476 m->m_flags |= M_BCAST; 1477 else 1478 m->m_flags |= M_MCAST; 1479 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 1480 } 1481 1482 ipoib_demux(ifp, m, ntohs(eh->proto)); 1483 CURVNET_RESTORE(); 1484} 1485 1486static int 1487ipoib_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 1488 struct sockaddr *sa) 1489{ 1490 struct sockaddr_dl *sdl; 1491#ifdef INET 1492 struct sockaddr_in *sin; 1493#endif 1494#ifdef INET6 1495 struct sockaddr_in6 *sin6; 1496#endif 1497 u_char *e_addr; 1498 1499 switch(sa->sa_family) { 1500 case AF_LINK: 1501 /* 1502 * No mapping needed. Just check that it's a valid MC address. 1503 */ 1504 sdl = (struct sockaddr_dl *)sa; 1505 e_addr = LLADDR(sdl); 1506 if (!IPOIB_IS_MULTICAST(e_addr)) 1507 return EADDRNOTAVAIL; 1508 *llsa = NULL; 1509 return 0; 1510 1511#ifdef INET 1512 case AF_INET: 1513 sin = (struct sockaddr_in *)sa; 1514 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_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 ip_ib_mc_map(sin->sin_addr.s_addr, ifp->if_broadcastaddr, 1520 e_addr); 1521 *llsa = (struct sockaddr *)sdl; 1522 return 0; 1523#endif 1524#ifdef INET6 1525 case AF_INET6: 1526 sin6 = (struct sockaddr_in6 *)sa; 1527 /* 1528 * An IP6 address of 0 means listen to all 1529 * of the multicast address used for IP6. 1530 * This has no meaning in ipoib. 1531 */ 1532 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 1533 return EADDRNOTAVAIL; 1534 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 1535 return EADDRNOTAVAIL; 1536 sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND); 1537 sdl->sdl_alen = INFINIBAND_ALEN; 1538 e_addr = LLADDR(sdl); 1539 ipv6_ib_mc_map(&sin6->sin6_addr, ifp->if_broadcastaddr, e_addr); 1540 *llsa = (struct sockaddr *)sdl; 1541 return 0; 1542#endif 1543 1544 default: 1545 return EAFNOSUPPORT; 1546 } 1547} 1548 1549module_init(ipoib_init_module); 1550module_exit(ipoib_cleanup_module); 1551 1552static int 1553ipoib_evhand(module_t mod, int event, void *arg) 1554{ 1555 return (0); 1556} 1557 1558static moduledata_t ipoib_mod = { 1559 .name = "ipoib", 1560 .evhand = ipoib_evhand, 1561}; 1562 1563DECLARE_MODULE(ipoib, ipoib_mod, SI_SUB_LAST, SI_ORDER_ANY); 1564MODULE_DEPEND(ipoib, ibcore, 1, 1, 1); 1565MODULE_DEPEND(ipoib, linuxkpi, 1, 1, 1); 1566