sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c

   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/init.h>
  44 #include <linux/slab.h>
  45 #include <linux/kernel.h>
  46 #include <linux/vmalloc.h>
  47
  48 #include <linux/if_arp.h>       /* For ARPHRD_xxx */
  49 #include <linux/if_vlan.h>
  50 #include <net/ip.h>
  51 #include <net/ipv6.h>
  52
  53 MODULE_AUTHOR("Roland Dreier");
  54 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
  55 MODULE_LICENSE("Dual BSD/GPL");
  56
  57 int ipoib_sendq_size = IPOIB_TX_RING_SIZE;
  58 int ipoib_recvq_size = IPOIB_RX_RING_SIZE;
  59
  60 module_param_named(send_queue_size, ipoib_sendq_size, int, 0444);
  61 MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue");
  62 module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444);
  63 MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue");
  64
  65 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
  66 int ipoib_debug_level = 1;
  67
  68 module_param_named(debug_level, ipoib_debug_level, int, 0644);
  69 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
  70 #endif
  71
  72 struct ipoib_path_iter {
  73         struct ipoib_dev_priv *priv;
  74         struct ipoib_path  path;
  75 };
  76
  77 static const u8 ipv4_bcast_addr[] = {
  78         0x00, 0xff, 0xff, 0xff,
  79         0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
  80         0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
  81 };
  82
  83 struct workqueue_struct *ipoib_workqueue;
  84
  85 struct ib_sa_client ipoib_sa_client;
  86
  87 static void ipoib_add_one(struct ib_device *device);
  88 static void ipoib_remove_one(struct ib_device *device);
  89 static void ipoib_start(struct ifnet *dev);
  90 static int ipoib_output(struct ifnet *ifp, struct mbuf *m,
  91             struct sockaddr *dst, struct route *ro);
  92 static int ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data);
  93 static void ipoib_input(struct ifnet *ifp, struct mbuf *m);
  94
  95 #define IPOIB_MTAP(_ifp, _m)                                    \
  96 do {                                                            \
  97         if (bpf_peers_present((_ifp)->if_bpf)) {                \
  98                 M_ASSERTVALID(_m);                              \
  99                 ipoib_mtap_mb((_ifp), (_m));                    \
 100         }                                                       \
 101 } while (0)
 102
 103 /*
 104  * This is for clients that have an ipoib_header in the mbuf.
 105  */
 106 static void
 107 ipoib_mtap_mb(struct ifnet *ifp, struct mbuf *mb)
 108 {
 109         struct ipoib_header *ih;
 110         struct ether_header eh;
 111
 112         ih = mtod(mb, struct ipoib_header *);
 113         eh.ether_type = ih->proto;
 114         bcopy(ih->hwaddr, &eh.ether_dhost, ETHER_ADDR_LEN);
 115         bzero(&eh.ether_shost, ETHER_ADDR_LEN);
 116         mb->m_data += sizeof(struct ipoib_header);
 117         mb->m_len -= sizeof(struct ipoib_header);
 118         bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb);
 119         mb->m_data -= sizeof(struct ipoib_header);
 120         mb->m_len += sizeof(struct ipoib_header);
 121 }
 122
 123 void
 124 ipoib_mtap_proto(struct ifnet *ifp, struct mbuf *mb, uint16_t proto)
 125 {
 126         struct ether_header eh;
 127
 128         eh.ether_type = proto;
 129         bzero(&eh.ether_shost, ETHER_ADDR_LEN);
 130         bzero(&eh.ether_dhost, ETHER_ADDR_LEN);
 131         bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb);
 132 }
 133
 134 static struct ib_client ipoib_client = {
 135         .name   = "ipoib",
 136         .add    = ipoib_add_one,
 137         .remove = ipoib_remove_one
 138 };
 139
 140 int
 141 ipoib_open(struct ipoib_dev_priv *priv)
 142 {
 143         struct ifnet *dev = priv->dev;
 144
 145         ipoib_dbg(priv, "bringing up interface\n");
 146
 147         set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 148
 149         if (ipoib_pkey_dev_delay_open(priv))
 150                 return 0;
 151
 152         if (ipoib_ib_dev_open(priv))
 153                 goto err_disable;
 154
 155         if (ipoib_ib_dev_up(priv))
 156                 goto err_stop;
 157
 158         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
 159                 struct ipoib_dev_priv *cpriv;
 160
 161                 /* Bring up any child interfaces too */
 162                 mutex_lock(&priv->vlan_mutex);
 163                 list_for_each_entry(cpriv, &priv->child_intfs, list)
 164                         if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) == 0)
 165                                 ipoib_open(cpriv);
 166                 mutex_unlock(&priv->vlan_mutex);
 167         }
 168         dev->if_drv_flags |= IFF_DRV_RUNNING;
 169         dev->if_drv_flags &= ~IFF_DRV_OACTIVE;
 170
 171         return 0;
 172
 173 err_stop:
 174         ipoib_ib_dev_stop(priv, 1);
 175
 176 err_disable:
 177         clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 178
 179         return -EINVAL;
 180 }
 181
 182 static void
 183 ipoib_init(void *arg)
 184 {
 185         struct ifnet *dev;
 186         struct ipoib_dev_priv *priv;
 187
 188         priv = arg;
 189         dev = priv->dev;
 190         if ((dev->if_drv_flags & IFF_DRV_RUNNING) == 0)
 191                 ipoib_open(priv);
 192         queue_work(ipoib_workqueue, &priv->flush_light);
 193 }
 194
 195
 196 static int
 197 ipoib_stop(struct ipoib_dev_priv *priv)
 198 {
 199         struct ifnet *dev = priv->dev;
 200
 201         ipoib_dbg(priv, "stopping interface\n");
 202
 203         clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 204
 205         dev->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 206
 207         ipoib_ib_dev_down(priv, 0);
 208         ipoib_ib_dev_stop(priv, 0);
 209
 210         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
 211                 struct ipoib_dev_priv *cpriv;
 212
 213                 /* Bring down any child interfaces too */
 214                 mutex_lock(&priv->vlan_mutex);
 215                 list_for_each_entry(cpriv, &priv->child_intfs, list)
 216                         if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) != 0)
 217                                 ipoib_stop(cpriv);
 218                 mutex_unlock(&priv->vlan_mutex);
 219         }
 220
 221         return 0;
 222 }
 223
 224 int
 225 ipoib_change_mtu(struct ipoib_dev_priv *priv, int new_mtu)
 226 {
 227         struct ifnet *dev = priv->dev;
 228
 229         /* dev->if_mtu > 2K ==> connected mode */
 230         if (ipoib_cm_admin_enabled(priv)) {
 231                 if (new_mtu > IPOIB_CM_MTU(ipoib_cm_max_mtu(priv)))
 232                         return -EINVAL;
 233
 234                 if (new_mtu > priv->mcast_mtu)
 235                         ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
 236                                    priv->mcast_mtu);
 237
 238                 dev->if_mtu = new_mtu;
 239                 return 0;
 240         }
 241
 242         if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu))
 243                 return -EINVAL;
 244
 245         priv->admin_mtu = new_mtu;
 246
 247         dev->if_mtu = min(priv->mcast_mtu, priv->admin_mtu);
 248
 249         queue_work(ipoib_workqueue, &priv->flush_light);
 250
 251         return 0;
 252 }
 253
 254 static int
 255 ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 256 {
 257         struct ipoib_dev_priv *priv = ifp->if_softc;
 258         struct ifaddr *ifa = (struct ifaddr *) data;
 259         struct ifreq *ifr = (struct ifreq *) data;
 260         int error = 0;
 261
 262         switch (command) {
 263         case SIOCSIFFLAGS:
 264                 if (ifp->if_flags & IFF_UP) {
 265                         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
 266                                 error = -ipoib_open(priv);
 267                 } else
 268                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 269                                 ipoib_stop(priv);
 270                 break;
 271         case SIOCADDMULTI:
 272         case SIOCDELMULTI:
 273                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 274                         queue_work(ipoib_workqueue, &priv->restart_task);
 275                 break;
 276         case SIOCSIFADDR:
 277                 ifp->if_flags |= IFF_UP;
 278
 279                 switch (ifa->ifa_addr->sa_family) {
 280 #ifdef INET
 281                 case AF_INET:
 282                         ifp->if_init(ifp->if_softc);    /* before arpwhohas */
 283                         arp_ifinit(ifp, ifa);
 284                         break;
 285 #endif
 286                 default:
 287                         ifp->if_init(ifp->if_softc);
 288                         break;
 289                 }
 290                 break;
 291
 292         case SIOCGIFADDR:
 293                 {
 294                         struct sockaddr *sa;
 295
 296                         sa = (struct sockaddr *) & ifr->ifr_data;
 297                         bcopy(IF_LLADDR(ifp),
 298                               (caddr_t) sa->sa_data, INFINIBAND_ALEN);
 299                 }
 300                 break;
 301
 302         case SIOCSIFMTU:
 303                 /*
 304                  * Set the interface MTU.
 305                  */
 306                 error = -ipoib_change_mtu(priv, ifr->ifr_mtu);
 307                 break;
 308         default:
 309                 error = EINVAL;
 310                 break;
 311         }
 312         return (error);
 313 }
 314
 315
 316 static struct ipoib_path *
 317 __path_find(struct ipoib_dev_priv *priv, void *gid)
 318 {
 319         struct rb_node *n = priv->path_tree.rb_node;
 320         struct ipoib_path *path;
 321         int ret;
 322
 323         while (n) {
 324                 path = rb_entry(n, struct ipoib_path, rb_node);
 325
 326                 ret = memcmp(gid, path->pathrec.dgid.raw,
 327                              sizeof (union ib_gid));
 328
 329                 if (ret < 0)
 330                         n = n->rb_left;
 331                 else if (ret > 0)
 332                         n = n->rb_right;
 333                 else
 334                         return path;
 335         }
 336
 337         return NULL;
 338 }
 339
 340 static int
 341 __path_add(struct ipoib_dev_priv *priv, struct ipoib_path *path)
 342 {
 343         struct rb_node **n = &priv->path_tree.rb_node;
 344         struct rb_node *pn = NULL;
 345         struct ipoib_path *tpath;
 346         int ret;
 347
 348         while (*n) {
 349                 pn = *n;
 350                 tpath = rb_entry(pn, struct ipoib_path, rb_node);
 351
 352                 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
 353                              sizeof (union ib_gid));
 354                 if (ret < 0)
 355                         n = &pn->rb_left;
 356                 else if (ret > 0)
 357                         n = &pn->rb_right;
 358                 else
 359                         return -EEXIST;
 360         }
 361
 362         rb_link_node(&path->rb_node, pn, n);
 363         rb_insert_color(&path->rb_node, &priv->path_tree);
 364
 365         list_add_tail(&path->list, &priv->path_list);
 366
 367         return 0;
 368 }
 369
 370 void
 371 ipoib_path_free(struct ipoib_dev_priv *priv, struct ipoib_path *path)
 372 {
 373
 374         _IF_DRAIN(&path->queue);
 375
 376         if (path->ah)
 377                 ipoib_put_ah(path->ah);
 378         if (ipoib_cm_get(path))
 379                 ipoib_cm_destroy_tx(ipoib_cm_get(path));
 380
 381         kfree(path);
 382 }
 383
 384 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
 385
 386 struct ipoib_path_iter *
 387 ipoib_path_iter_init(struct ipoib_dev_priv *priv)
 388 {
 389         struct ipoib_path_iter *iter;
 390
 391         iter = kmalloc(sizeof *iter, GFP_KERNEL);
 392         if (!iter)
 393                 return NULL;
 394
 395         iter->priv = priv;
 396         memset(iter->path.pathrec.dgid.raw, 0, 16);
 397
 398         if (ipoib_path_iter_next(iter)) {
 399                 kfree(iter);
 400                 return NULL;
 401         }
 402
 403         return iter;
 404 }
 405
 406 int
 407 ipoib_path_iter_next(struct ipoib_path_iter *iter)
 408 {
 409         struct ipoib_dev_priv *priv = iter->priv;
 410         struct rb_node *n;
 411         struct ipoib_path *path;
 412         int ret = 1;
 413
 414         spin_lock_irq(&priv->lock);
 415
 416         n = rb_first(&priv->path_tree);
 417
 418         while (n) {
 419                 path = rb_entry(n, struct ipoib_path, rb_node);
 420
 421                 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
 422                            sizeof (union ib_gid)) < 0) {
 423                         iter->path = *path;
 424                         ret = 0;
 425                         break;
 426                 }
 427
 428                 n = rb_next(n);
 429         }
 430
 431         spin_unlock_irq(&priv->lock);
 432
 433         return ret;
 434 }
 435
 436 void
 437 ipoib_path_iter_read(struct ipoib_path_iter *iter, struct ipoib_path *path)
 438 {
 439         *path = iter->path;
 440 }
 441
 442 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
 443
 444 void
 445 ipoib_mark_paths_invalid(struct ipoib_dev_priv *priv)
 446 {
 447         struct ipoib_path *path, *tp;
 448
 449         spin_lock_irq(&priv->lock);
 450
 451         list_for_each_entry_safe(path, tp, &priv->path_list, list) {
 452                 ipoib_dbg(priv, "mark path LID 0x%04x GID %16D invalid\n",
 453                         be16_to_cpu(path->pathrec.dlid),
 454                         path->pathrec.dgid.raw, ":");
 455                 path->valid =  0;
 456         }
 457
 458         spin_unlock_irq(&priv->lock);
 459 }
 460
 461 void
 462 ipoib_flush_paths(struct ipoib_dev_priv *priv)
 463 {
 464         struct ipoib_path *path, *tp;
 465         LIST_HEAD(remove_list);
 466         unsigned long flags;
 467
 468         spin_lock_irqsave(&priv->lock, flags);
 469
 470         list_splice_init(&priv->path_list, &remove_list);
 471
 472         list_for_each_entry(path, &remove_list, list)
 473                 rb_erase(&path->rb_node, &priv->path_tree);
 474
 475         list_for_each_entry_safe(path, tp, &remove_list, list) {
 476                 if (path->query)
 477                         ib_sa_cancel_query(path->query_id, path->query);
 478                 spin_unlock_irqrestore(&priv->lock, flags);
 479                 wait_for_completion(&path->done);
 480                 ipoib_path_free(priv, path);
 481                 spin_lock_irqsave(&priv->lock, flags);
 482         }
 483
 484         spin_unlock_irqrestore(&priv->lock, flags);
 485 }
 486
 487 static void
 488 path_rec_completion(int status, struct ib_sa_path_rec *pathrec, void *path_ptr)
 489 {
 490         struct ipoib_path *path = path_ptr;
 491         struct ipoib_dev_priv *priv = path->priv;
 492         struct ifnet *dev = priv->dev;
 493         struct ipoib_ah *ah = NULL;
 494         struct ipoib_ah *old_ah = NULL;
 495         struct ifqueue mbqueue;
 496         struct mbuf *mb;
 497         unsigned long flags;
 498
 499         if (!status)
 500                 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %16D\n",
 501                           be16_to_cpu(pathrec->dlid), pathrec->dgid.raw, ":");
 502         else
 503                 ipoib_dbg(priv, "PathRec status %d for GID %16D\n",
 504                           status, path->pathrec.dgid.raw, ":");
 505
 506         bzero(&mbqueue, sizeof(mbqueue));
 507
 508         if (!status) {
 509                 struct ib_ah_attr av;
 510
 511                 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av))
 512                         ah = ipoib_create_ah(priv, priv->pd, &av);
 513         }
 514
 515         spin_lock_irqsave(&priv->lock, flags);
 516
 517         if (ah) {
 518                 path->pathrec = *pathrec;
 519
 520                 old_ah   = path->ah;
 521                 path->ah = ah;
 522
 523                 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
 524                           ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
 525
 526                 for (;;) {
 527                         _IF_DEQUEUE(&path->queue, mb);
 528                         if (mb == NULL)
 529                                 break;
 530                         _IF_ENQUEUE(&mbqueue, mb);
 531                 }
 532
 533 #ifdef CONFIG_INFINIBAND_IPOIB_CM
 534                 if (ipoib_cm_enabled(priv, path->hwaddr) && !ipoib_cm_get(path))
 535                         ipoib_cm_set(path, ipoib_cm_create_tx(priv, path));
 536 #endif
 537
 538                 path->valid = 1;
 539         }
 540
 541         path->query = NULL;
 542         complete(&path->done);
 543
 544         spin_unlock_irqrestore(&priv->lock, flags);
 545
 546         if (old_ah)
 547                 ipoib_put_ah(old_ah);
 548
 549         for (;;) {
 550                 _IF_DEQUEUE(&mbqueue, mb);
 551                 if (mb == NULL)
 552                         break;
 553                 mb->m_pkthdr.rcvif = dev;
 554                 if (dev->if_transmit(dev, mb))
 555                         ipoib_warn(priv, "dev_queue_xmit failed "
 556                                    "to requeue packet\n");
 557         }
 558 }
 559
 560 static struct ipoib_path *
 561 path_rec_create(struct ipoib_dev_priv *priv, uint8_t *hwaddr)
 562 {
 563         struct ipoib_path *path;
 564
 565         if (!priv->broadcast)
 566                 return NULL;
 567
 568         path = kzalloc(sizeof *path, GFP_ATOMIC);
 569         if (!path)
 570                 return NULL;
 571
 572         path->priv = priv;
 573
 574         bzero(&path->queue, sizeof(path->queue));
 575
 576 #ifdef CONFIG_INFINIBAND_IPOIB_CM
 577         memcpy(&path->hwaddr, hwaddr, INFINIBAND_ALEN);
 578 #endif
 579         memcpy(path->pathrec.dgid.raw, &hwaddr[4], sizeof (union ib_gid));
 580         path->pathrec.sgid          = priv->local_gid;
 581         path->pathrec.pkey          = cpu_to_be16(priv->pkey);
 582         path->pathrec.numb_path     = 1;
 583         path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
 584
 585         return path;
 586 }
 587
 588 static int
 589 path_rec_start(struct ipoib_dev_priv *priv, struct ipoib_path *path)
 590 {
 591         struct ifnet *dev = priv->dev;
 592
 593         ib_sa_comp_mask comp_mask = IB_SA_PATH_REC_MTU_SELECTOR | IB_SA_PATH_REC_MTU;
 594         struct ib_sa_path_rec p_rec;
 595
 596         p_rec = path->pathrec;
 597         p_rec.mtu_selector = IB_SA_GT;
 598
 599         switch (roundup_pow_of_two(dev->if_mtu + IPOIB_ENCAP_LEN)) {
 600         case 512:
 601                 p_rec.mtu = IB_MTU_256;
 602                 break;
 603         case 1024:
 604                 p_rec.mtu = IB_MTU_512;
 605                 break;
 606         case 2048:
 607                 p_rec.mtu = IB_MTU_1024;
 608                 break;
 609         case 4096:
 610                 p_rec.mtu = IB_MTU_2048;
 611                 break;
 612         default:
 613                 /* Wildcard everything */
 614                 comp_mask = 0;
 615                 p_rec.mtu = 0;
 616                 p_rec.mtu_selector = 0;
 617         }
 618
 619         ipoib_dbg(priv, "Start path record lookup for %16D MTU > %d\n",
 620                   p_rec.dgid.raw, ":",
 621                   comp_mask ? ib_mtu_enum_to_int(p_rec.mtu) : 0);
 622
 623         init_completion(&path->done);
 624
 625         path->query_id =
 626                 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
 627                                    &p_rec, comp_mask            |
 628                                    IB_SA_PATH_REC_DGID          |
 629                                    IB_SA_PATH_REC_SGID          |
 630                                    IB_SA_PATH_REC_NUMB_PATH     |
 631                                    IB_SA_PATH_REC_TRAFFIC_CLASS |
 632                                    IB_SA_PATH_REC_PKEY,
 633                                    1000, GFP_ATOMIC,
 634                                    path_rec_completion,
 635                                    path, &path->query);
 636         if (path->query_id < 0) {
 637                 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
 638                 path->query = NULL;
 639                 complete(&path->done);
 640                 return path->query_id;
 641         }
 642
 643         return 0;
 644 }
 645
 646 static void
 647 ipoib_unicast_send(struct mbuf *mb, struct ipoib_dev_priv *priv, struct ipoib_header *eh)
 648 {
 649         struct ipoib_path *path;
 650
 651         path = __path_find(priv, eh->hwaddr + 4);
 652         if (!path || !path->valid) {
 653                 int new_path = 0;
 654
 655                 if (!path) {
 656                         path = path_rec_create(priv, eh->hwaddr);
 657                         new_path = 1;
 658                 }
 659                 if (path) {
 660                         _IF_ENQUEUE(&path->queue, mb);
 661                         if (!path->query && path_rec_start(priv, path)) {
 662                                 spin_unlock_irqrestore(&priv->lock, flags);
 663                                 if (new_path)
 664                                         ipoib_path_free(priv, path);
 665                                 return;
 666                         } else
 667                                 __path_add(priv, path);
 668                 } else {
 669                         ++priv->dev->if_oerrors;
 670                         m_freem(mb);
 671                 }
 672
 673                 return;
 674         }
 675
 676         if (ipoib_cm_get(path) && ipoib_cm_up(path)) {
 677                 ipoib_cm_send(priv, mb, ipoib_cm_get(path));
 678         } else if (path->ah) {
 679                 ipoib_send(priv, mb, path->ah, IPOIB_QPN(eh->hwaddr));
 680         } else if ((path->query || !path_rec_start(priv, path)) &&
 681                     path->queue.ifq_len < IPOIB_MAX_PATH_REC_QUEUE) {
 682                 _IF_ENQUEUE(&path->queue, mb);
 683         } else {
 684                 ++priv->dev->if_oerrors;
 685                 m_freem(mb);
 686         }
 687 }
 688
 689 static int
 690 ipoib_send_one(struct ipoib_dev_priv *priv, struct mbuf *mb)
 691 {
 692         struct ipoib_header *eh;
 693
 694         eh = mtod(mb, struct ipoib_header *);
 695         if (IPOIB_IS_MULTICAST(eh->hwaddr)) {
 696                 /* Add in the P_Key for multicast*/
 697                 eh->hwaddr[8] = (priv->pkey >> 8) & 0xff;
 698                 eh->hwaddr[9] = priv->pkey & 0xff;
 699
 700                 ipoib_mcast_send(priv, eh->hwaddr + 4, mb);
 701         } else
 702                 ipoib_unicast_send(mb, priv, eh);
 703
 704         return 0;
 705 }
 706
 707
 708 static void
 709 _ipoib_start(struct ifnet *dev, struct ipoib_dev_priv *priv)
 710 {
 711         struct mbuf *mb;
 712
 713         if ((dev->if_drv_flags & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) !=
 714             IFF_DRV_RUNNING)
 715                 return;
 716
 717         spin_lock(&priv->lock);
 718         while (!IFQ_DRV_IS_EMPTY(&dev->if_snd) &&
 719             (dev->if_drv_flags & IFF_DRV_OACTIVE) == 0) {
 720                 IFQ_DRV_DEQUEUE(&dev->if_snd, mb);
 721                 if (mb == NULL)
 722                         break;
 723                 IPOIB_MTAP(dev, mb);
 724                 ipoib_send_one(priv, mb);
 725         }
 726         spin_unlock(&priv->lock);
 727 }
 728
 729 static void
 730 ipoib_start(struct ifnet *dev)
 731 {
 732         _ipoib_start(dev, dev->if_softc);
 733 }
 734
 735 static void
 736 ipoib_vlan_start(struct ifnet *dev)
 737 {
 738         struct ipoib_dev_priv *priv;
 739         struct mbuf *mb;
 740
 741         priv = VLAN_COOKIE(dev);
 742         if (priv != NULL)
 743                 return _ipoib_start(dev, priv);
 744         while (!IFQ_DRV_IS_EMPTY(&dev->if_snd)) {
 745                 IFQ_DRV_DEQUEUE(&dev->if_snd, mb);
 746                 if (mb == NULL)
 747                         break;
 748                 m_freem(mb);
 749                 dev->if_oerrors++;
 750         }
 751 }
 752
 753 int
 754 ipoib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port)
 755 {
 756
 757         /* Allocate RX/TX "rings" to hold queued mbs */
 758         priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
 759                                 GFP_KERNEL);
 760         if (!priv->rx_ring) {
 761                 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
 762                        ca->name, ipoib_recvq_size);
 763                 goto out;
 764         }
 765
 766         priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, GFP_KERNEL);
 767         if (!priv->tx_ring) {
 768                 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
 769                        ca->name, ipoib_sendq_size);
 770                 goto out_rx_ring_cleanup;
 771         }
 772         memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring);
 773
 774         /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
 775
 776         if (ipoib_ib_dev_init(priv, ca, port))
 777                 goto out_tx_ring_cleanup;
 778
 779         return 0;
 780
 781 out_tx_ring_cleanup:
 782         kfree(priv->tx_ring);
 783
 784 out_rx_ring_cleanup:
 785         kfree(priv->rx_ring);
 786
 787 out:
 788         return -ENOMEM;
 789 }
 790
 791 static void
 792 ipoib_detach(struct ipoib_dev_priv *priv)
 793 {
 794         struct ifnet *dev;
 795
 796         dev = priv->dev;
 797         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
 798                 bpfdetach(dev);
 799                 if_detach(dev);
 800                 if_free(dev);
 801         } else
 802                 VLAN_SETCOOKIE(priv->dev, NULL);
 803
 804         free(priv, M_TEMP);
 805 }
 806
 807 void
 808 ipoib_dev_cleanup(struct ipoib_dev_priv *priv)
 809 {
 810         struct ipoib_dev_priv *cpriv, *tcpriv;
 811
 812         /* Delete any child interfaces first */
 813         list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
 814                 ipoib_dev_cleanup(cpriv);
 815                 ipoib_detach(cpriv);
 816         }
 817
 818         ipoib_ib_dev_cleanup(priv);
 819
 820         kfree(priv->rx_ring);
 821         kfree(priv->tx_ring);
 822
 823         priv->rx_ring = NULL;
 824         priv->tx_ring = NULL;
 825 }
 826
 827 static volatile int ipoib_unit;
 828
 829 static struct ipoib_dev_priv *
 830 ipoib_priv_alloc(void)
 831 {
 832         struct ipoib_dev_priv *priv;
 833
 834         priv = malloc(sizeof(struct ipoib_dev_priv), M_TEMP, M_ZERO|M_WAITOK);
 835         spin_lock_init(&priv->lock);
 836         mutex_init(&priv->vlan_mutex);
 837         INIT_LIST_HEAD(&priv->path_list);
 838         INIT_LIST_HEAD(&priv->child_intfs);
 839         INIT_LIST_HEAD(&priv->dead_ahs);
 840         INIT_LIST_HEAD(&priv->multicast_list);
 841         INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll);
 842         INIT_DELAYED_WORK(&priv->mcast_task,   ipoib_mcast_join_task);
 843         INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
 844         INIT_WORK(&priv->flush_light,   ipoib_ib_dev_flush_light);
 845         INIT_WORK(&priv->flush_normal,   ipoib_ib_dev_flush_normal);
 846         INIT_WORK(&priv->flush_heavy,   ipoib_ib_dev_flush_heavy);
 847         INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
 848         INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
 849         memcpy(priv->broadcastaddr, ipv4_bcast_addr, INFINIBAND_ALEN);
 850
 851         return (priv);
 852 }
 853
 854 struct ipoib_dev_priv *
 855 ipoib_intf_alloc(const char *name)
 856 {
 857         struct ipoib_dev_priv *priv;
 858         struct sockaddr_dl *sdl;
 859         struct ifnet *dev;
 860
 861         priv = ipoib_priv_alloc();
 862         dev = priv->dev = if_alloc(IFT_INFINIBAND);
 863         if (!dev) {
 864                 free(priv, M_TEMP);
 865                 return NULL;
 866         }
 867         dev->if_softc = priv;
 868         if_initname(dev, name, atomic_fetchadd_int(&ipoib_unit, 1));
 869         dev->if_flags = IFF_BROADCAST | IFF_MULTICAST;
 870         dev->if_addrlen = INFINIBAND_ALEN;
 871         dev->if_hdrlen = IPOIB_HEADER_LEN;
 872         if_attach(dev);
 873         dev->if_init = ipoib_init;
 874         dev->if_ioctl = ipoib_ioctl;
 875         dev->if_start = ipoib_start;
 876         dev->if_output = ipoib_output;
 877         dev->if_input = ipoib_input;
 878         dev->if_resolvemulti = ipoib_resolvemulti;
 879         dev->if_baudrate = IF_Gbps(10UL);
 880         dev->if_broadcastaddr = priv->broadcastaddr;
 881         dev->if_snd.ifq_maxlen = ipoib_sendq_size * 2;
 882         sdl = (struct sockaddr_dl *)dev->if_addr->ifa_addr;
 883         sdl->sdl_type = IFT_INFINIBAND;
 884         sdl->sdl_alen = dev->if_addrlen;
 885         priv->dev = dev;
 886         if_link_state_change(dev, LINK_STATE_DOWN);
 887         bpfattach(dev, DLT_EN10MB, ETHER_HDR_LEN);
 888
 889         return dev->if_softc;
 890 }
 891
 892 int
 893 ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca)
 894 {
 895         struct ib_device_attr *device_attr;
 896         int result = -ENOMEM;
 897
 898         device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
 899         if (!device_attr) {
 900                 printk(KERN_WARNING "%s: allocation of %zu bytes failed\n",
 901                        hca->name, sizeof *device_attr);
 902                 return result;
 903         }
 904
 905         result = ib_query_device(hca, device_attr);
 906         if (result) {
 907                 printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n",
 908                        hca->name, result);
 909                 kfree(device_attr);
 910                 return result;
 911         }
 912         priv->hca_caps = device_attr->device_cap_flags;
 913
 914         kfree(device_attr);
 915
 916         priv->dev->if_hwassist = 0;
 917         priv->dev->if_capabilities = 0;
 918
 919 #ifndef CONFIG_INFINIBAND_IPOIB_CM
 920         if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
 921                 set_bit(IPOIB_FLAG_CSUM, &priv->flags);
 922                 priv->dev->if_hwassist = CSUM_IP | CSUM_TCP | CSUM_UDP;
 923                 priv->dev->if_capabilities = IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM;
 924         }
 925
 926 #if 0
 927         if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO) {
 928                 priv->dev->if_capabilities |= IFCAP_TSO4;
 929                 priv->dev->if_hwassist |= CSUM_TSO;
 930         }
 931 #endif
 932 #endif
 933         priv->dev->if_capabilities |=
 934             IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_LINKSTATE;
 935         priv->dev->if_capenable = priv->dev->if_capabilities;
 936
 937         return 0;
 938 }
 939
 940
 941 static struct ifnet *
 942 ipoib_add_port(const char *format, struct ib_device *hca, u8 port)
 943 {
 944         struct ipoib_dev_priv *priv;
 945         struct ib_port_attr attr;
 946         int result = -ENOMEM;
 947
 948         priv = ipoib_intf_alloc(format);
 949         if (!priv)
 950                 goto alloc_mem_failed;
 951
 952         if (!ib_query_port(hca, port, &attr))
 953                 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
 954         else {
 955                 printk(KERN_WARNING "%s: ib_query_port %d failed\n",
 956                        hca->name, port);
 957                 goto device_init_failed;
 958         }
 959
 960         /* MTU will be reset when mcast join happens */
 961         priv->dev->if_mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
 962         priv->mcast_mtu = priv->admin_mtu = priv->dev->if_mtu;
 963
 964         result = ib_query_pkey(hca, port, 0, &priv->pkey);
 965         if (result) {
 966                 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
 967                        hca->name, port, result);
 968                 goto device_init_failed;
 969         }
 970
 971         if (ipoib_set_dev_features(priv, hca))
 972                 goto device_init_failed;
 973
 974         /*
 975          * Set the full membership bit, so that we join the right
 976          * broadcast group, etc.
 977          */
 978         priv->pkey |= 0x8000;
 979
 980         priv->broadcastaddr[8] = priv->pkey >> 8;
 981         priv->broadcastaddr[9] = priv->pkey & 0xff;
 982
 983         result = ib_query_gid(hca, port, 0, &priv->local_gid);
 984         if (result) {
 985                 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
 986                        hca->name, port, result);
 987                 goto device_init_failed;
 988         }
 989         memcpy(IF_LLADDR(priv->dev) + 4, priv->local_gid.raw, sizeof (union ib_gid));
 990
 991         result = ipoib_dev_init(priv, hca, port);
 992         if (result < 0) {
 993                 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
 994                        hca->name, port, result);
 995                 goto device_init_failed;
 996         }
 997         if (ipoib_cm_admin_enabled(priv))
 998                 priv->dev->if_mtu = IPOIB_CM_MTU(ipoib_cm_max_mtu(priv));
 999
1000         INIT_IB_EVENT_HANDLER(&priv->event_handler,
1001                               priv->ca, ipoib_event);
1002         result = ib_register_event_handler(&priv->event_handler);
1003         if (result < 0) {
1004                 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1005                        "port %d (ret = %d)\n",
1006                        hca->name, port, result);
1007                 goto event_failed;
1008         }
1009         if_printf(priv->dev, "Attached to %s port %d\n", hca->name, port);
1010
1011         return priv->dev;
1012
1013 event_failed:
1014         ipoib_dev_cleanup(priv);
1015
1016 device_init_failed:
1017         ipoib_detach(priv);
1018
1019 alloc_mem_failed:
1020         return ERR_PTR(result);
1021 }
1022
1023 static void
1024 ipoib_add_one(struct ib_device *device)
1025 {
1026         struct list_head *dev_list;
1027         struct ifnet *dev;
1028         struct ipoib_dev_priv *priv;
1029         int s, e, p;
1030
1031         if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1032                 return;
1033
1034         dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1035         if (!dev_list)
1036                 return;
1037
1038         INIT_LIST_HEAD(dev_list);
1039
1040         if (device->node_type == RDMA_NODE_IB_SWITCH) {
1041                 s = 0;
1042                 e = 0;
1043         } else {
1044                 s = 1;
1045                 e = device->phys_port_cnt;
1046         }
1047
1048         for (p = s; p <= e; ++p) {
1049                 if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND)
1050                         continue;
1051                 dev = ipoib_add_port("ib", device, p);
1052                 if (!IS_ERR(dev)) {
1053                         priv = dev->if_softc;
1054                         list_add_tail(&priv->list, dev_list);
1055                 }
1056         }
1057
1058         ib_set_client_data(device, &ipoib_client, dev_list);
1059 }
1060
1061 static void
1062 ipoib_remove_one(struct ib_device *device)
1063 {
1064         struct ipoib_dev_priv *priv, *tmp;
1065         struct list_head *dev_list;
1066
1067         if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1068                 return;
1069
1070         dev_list = ib_get_client_data(device, &ipoib_client);
1071
1072         list_for_each_entry_safe(priv, tmp, dev_list, list) {
1073                 if (rdma_port_get_link_layer(device, priv->port) != IB_LINK_LAYER_INFINIBAND)
1074                         continue;
1075
1076                 ib_unregister_event_handler(&priv->event_handler);
1077
1078                 /* dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); */
1079
1080                 flush_workqueue(ipoib_workqueue);
1081
1082                 ipoib_dev_cleanup(priv);
1083                 ipoib_detach(priv);
1084         }
1085
1086         kfree(dev_list);
1087 }
1088
1089 static void
1090 ipoib_config_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
1091 {
1092         struct ipoib_dev_priv *parent;
1093         struct ipoib_dev_priv *priv;
1094         struct ifnet *dev;
1095         uint16_t pkey;
1096         int error;
1097
1098         if (ifp->if_type != IFT_INFINIBAND)
1099                 return;
1100         dev = VLAN_DEVAT(ifp, vtag);
1101         if (dev == NULL)
1102                 return;
1103         priv = NULL;
1104         error = 0;
1105         parent = ifp->if_softc;
1106         /* We only support 15 bits of pkey. */
1107         if (vtag & 0x8000)
1108                 return;
1109         pkey = vtag | 0x8000;   /* Set full membership bit. */
1110         if (pkey == parent->pkey)
1111                 return;
1112         /* Check for dups */
1113         mutex_lock(&parent->vlan_mutex);
1114         list_for_each_entry(priv, &parent->child_intfs, list) {
1115                 if (priv->pkey == pkey) {
1116                         priv = NULL;
1117                         error = EBUSY;
1118                         goto out;
1119                 }
1120         }
1121         priv = ipoib_priv_alloc();
1122         priv->dev = dev;
1123         priv->max_ib_mtu = parent->max_ib_mtu;
1124         priv->mcast_mtu = priv->admin_mtu = parent->dev->if_mtu;
1125         set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
1126         error = ipoib_set_dev_features(priv, parent->ca);
1127         if (error)
1128                 goto out;
1129         priv->pkey = pkey;
1130         priv->broadcastaddr[8] = pkey >> 8;
1131         priv->broadcastaddr[9] = pkey & 0xff;
1132         dev->if_broadcastaddr = priv->broadcastaddr;
1133         error = ipoib_dev_init(priv, parent->ca, parent->port);
1134         if (error)
1135                 goto out;
1136         priv->parent = parent->dev;
1137         list_add_tail(&priv->list, &parent->child_intfs);
1138         VLAN_SETCOOKIE(dev, priv);
1139         dev->if_start = ipoib_vlan_start;
1140         dev->if_drv_flags &= ~IFF_DRV_RUNNING;
1141         dev->if_hdrlen = IPOIB_HEADER_LEN;
1142         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1143                 ipoib_open(priv);
1144         mutex_unlock(&parent->vlan_mutex);
1145         return;
1146 out:
1147         mutex_unlock(&parent->vlan_mutex);
1148         if (priv)
1149                 free(priv, M_TEMP);
1150         if (error)
1151                 ipoib_warn(parent,
1152                     "failed to initialize subinterface: device %s, port %d vtag 0x%X",
1153                     parent->ca->name, parent->port, vtag);
1154         return;
1155 }
1156
1157 static void
1158 ipoib_unconfig_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
1159 {
1160         struct ipoib_dev_priv *parent;
1161         struct ipoib_dev_priv *priv;
1162         struct ifnet *dev;
1163         uint16_t pkey;
1164
1165         if (ifp->if_type != IFT_INFINIBAND)
1166                 return;
1167
1168         dev = VLAN_DEVAT(ifp, vtag);
1169         if (dev)
1170                 VLAN_SETCOOKIE(dev, NULL);
1171         pkey = vtag | 0x8000;
1172         parent = ifp->if_softc;
1173         mutex_lock(&parent->vlan_mutex);
1174         list_for_each_entry(priv, &parent->child_intfs, list) {
1175                 if (priv->pkey == pkey) {
1176                         ipoib_dev_cleanup(priv);
1177                         list_del(&priv->list);
1178                         break;
1179                 }
1180         }
1181         mutex_unlock(&parent->vlan_mutex);
1182 }
1183
1184 eventhandler_tag ipoib_vlan_attach;
1185 eventhandler_tag ipoib_vlan_detach;
1186
1187 static int __init
1188 ipoib_init_module(void)
1189 {
1190         int ret;
1191
1192         ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
1193         ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
1194         ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
1195
1196         ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
1197         ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
1198         ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE,
1199                                                      IPOIB_MIN_QUEUE_SIZE));
1200 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1201         ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
1202 #endif
1203
1204         ipoib_vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
1205                 ipoib_config_vlan, NULL, EVENTHANDLER_PRI_FIRST);
1206         ipoib_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
1207                 ipoib_unconfig_vlan, NULL, EVENTHANDLER_PRI_FIRST);
1208
1209         /*
1210          * We create our own workqueue mainly because we want to be
1211          * able to flush it when devices are being removed.  We can't
1212          * use schedule_work()/flush_scheduled_work() because both
1213          * unregister_netdev() and linkwatch_event take the rtnl lock,
1214          * so flush_scheduled_work() can deadlock during device
1215          * removal.
1216          */
1217         ipoib_workqueue = create_singlethread_workqueue("ipoib");
1218         if (!ipoib_workqueue) {
1219                 ret = -ENOMEM;
1220                 goto err_fs;
1221         }
1222
1223         ib_sa_register_client(&ipoib_sa_client);
1224
1225         ret = ib_register_client(&ipoib_client);
1226         if (ret)
1227                 goto err_sa;
1228
1229         return 0;
1230
1231 err_sa:
1232         ib_sa_unregister_client(&ipoib_sa_client);
1233         destroy_workqueue(ipoib_workqueue);
1234
1235 err_fs:
1236         return ret;
1237 }
1238
1239 static void __exit
1240 ipoib_cleanup_module(void)
1241 {
1242
1243         EVENTHANDLER_DEREGISTER(vlan_config, ipoib_vlan_attach);
1244         EVENTHANDLER_DEREGISTER(vlan_unconfig, ipoib_vlan_detach);
1245         ib_unregister_client(&ipoib_client);
1246         ib_sa_unregister_client(&ipoib_sa_client);
1247         destroy_workqueue(ipoib_workqueue);
1248 }
1249
1250 /*
1251  * Infiniband output routine.
1252  */
1253 static int
1254 ipoib_output(struct ifnet *ifp, struct mbuf *m,
1255         struct sockaddr *dst, struct route *ro)
1256 {
1257         u_char edst[INFINIBAND_ALEN];
1258         struct llentry *lle = NULL;
1259         struct rtentry *rt0 = NULL;
1260         struct ipoib_header *eh;
1261         int error = 0;
1262         short type;
1263
1264         if (ro != NULL) {
1265                 if (!(m->m_flags & (M_BCAST | M_MCAST)))
1266                         lle = ro->ro_lle;
1267                 rt0 = ro->ro_rt;
1268         }
1269 #ifdef MAC
1270         error = mac_ifnet_check_transmit(ifp, m);
1271         if (error)
1272                 goto bad;
1273 #endif
1274
1275         M_PROFILE(m);
1276         if (ifp->if_flags & IFF_MONITOR) {
1277                 error = ENETDOWN;
1278                 goto bad;
1279         }
1280         if (!((ifp->if_flags & IFF_UP) &&
1281             (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
1282                 error = ENETDOWN;
1283                 goto bad;
1284         }
1285
1286         switch (dst->sa_family) {
1287 #ifdef INET
1288         case AF_INET:
1289                 if (lle != NULL && (lle->la_flags & LLE_VALID))
1290                         memcpy(edst, &lle->ll_addr.mac8, sizeof(edst));
1291                 else if (m->m_flags & M_MCAST)
1292                         ip_ib_mc_map(((struct sockaddr_in *)dst)->sin_addr.s_addr, ifp->if_broadcastaddr, edst);
1293                 else
1294                         error = arpresolve(ifp, rt0, m, dst, edst, &lle);
1295                 if (error)
1296                         return (error == EWOULDBLOCK ? 0 : error);
1297                 type = htons(ETHERTYPE_IP);
1298                 break;
1299         case AF_ARP:
1300         {
1301                 struct arphdr *ah;
1302                 ah = mtod(m, struct arphdr *);
1303                 ah->ar_hrd = htons(ARPHRD_INFINIBAND);
1304
1305                 switch(ntohs(ah->ar_op)) {
1306                 case ARPOP_REVREQUEST:
1307                 case ARPOP_REVREPLY:
1308                         type = htons(ETHERTYPE_REVARP);
1309                         break;
1310                 case ARPOP_REQUEST:
1311                 case ARPOP_REPLY:
1312                 default:
1313                         type = htons(ETHERTYPE_ARP);
1314                         break;
1315                 }
1316
1317                 if (m->m_flags & M_BCAST)
1318                         bcopy(ifp->if_broadcastaddr, edst, INFINIBAND_ALEN);
1319                 else
1320                         bcopy(ar_tha(ah), edst, INFINIBAND_ALEN);
1321
1322         }
1323         break;
1324 #endif
1325 #ifdef INET6
1326         case AF_INET6:
1327                 if (lle != NULL && (lle->la_flags & LLE_VALID))
1328                         memcpy(edst, &lle->ll_addr.mac8, sizeof(edst));
1329                 else if (m->m_flags & M_MCAST)
1330                         ipv6_ib_mc_map(&((struct sockaddr_in6 *)dst)->sin6_addr, ifp->if_broadcastaddr, edst);
1331                 else
1332                         error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle);
1333                 if (error)
1334                         return error;
1335                 type = htons(ETHERTYPE_IPV6);
1336                 break;
1337 #endif
1338
1339         default:
1340                 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
1341                 error = EAFNOSUPPORT;
1342                 goto bad;
1343         }
1344
1345         /*
1346          * Add local net header.  If no space in first mbuf,
1347          * allocate another.
1348          */
1349         M_PREPEND(m, IPOIB_HEADER_LEN, M_DONTWAIT);
1350         if (m == NULL) {
1351                 error = ENOBUFS;
1352                 goto bad;
1353         }
1354         eh = mtod(m, struct ipoib_header *);
1355         (void)memcpy(&eh->proto, &type, sizeof(eh->proto));
1356         (void)memcpy(&eh->hwaddr, edst, sizeof (edst));
1357
1358         /*
1359          * Queue message on interface, update output statistics if
1360          * successful, and start output if interface not yet active.
1361          */
1362         return ((ifp->if_transmit)(ifp, m));
1363 bad:
1364         if (m != NULL)
1365                 m_freem(m);
1366         return (error);
1367 }
1368
1369 /*
1370  * Upper layer processing for a received Infiniband packet.
1371  */
1372 void
1373 ipoib_demux(struct ifnet *ifp, struct mbuf *m, u_short proto)
1374 {
1375         int isr;
1376
1377 #ifdef MAC
1378         /*
1379          * Tag the mbuf with an appropriate MAC label before any other
1380          * consumers can get to it.
1381          */
1382         mac_ifnet_create_mbuf(ifp, m);
1383 #endif
1384         /* Allow monitor mode to claim this frame, after stats are updated. */
1385         if (ifp->if_flags & IFF_MONITOR) {
1386                 if_printf(ifp, "discard frame at IFF_MONITOR\n");
1387                 m_freem(m);
1388                 return;
1389         }
1390         /*
1391          * Dispatch frame to upper layer.
1392          */
1393         switch (proto) {
1394 #ifdef INET
1395         case ETHERTYPE_IP:
1396                 isr = NETISR_IP;
1397                 break;
1398
1399         case ETHERTYPE_ARP:
1400                 if (ifp->if_flags & IFF_NOARP) {
1401                         /* Discard packet if ARP is disabled on interface */
1402                         m_freem(m);
1403                         return;
1404                 }
1405                 isr = NETISR_ARP;
1406                 break;
1407 #endif
1408 #ifdef INET6
1409         case ETHERTYPE_IPV6:
1410                 isr = NETISR_IPV6;
1411                 break;
1412 #endif
1413         default:
1414                 goto discard;
1415         }
1416         netisr_dispatch(isr, m);
1417         return;
1418
1419 discard:
1420         m_freem(m);
1421 }
1422
1423 /*
1424  * Process a received Infiniband packet.
1425  */
1426 static void
1427 ipoib_input(struct ifnet *ifp, struct mbuf *m)
1428 {
1429         struct ipoib_header *eh;
1430
1431         if ((ifp->if_flags & IFF_UP) == 0) {
1432                 m_freem(m);
1433                 return;
1434         }
1435         CURVNET_SET_QUIET(ifp->if_vnet);
1436
1437         /* Let BPF have it before we strip the header. */
1438         IPOIB_MTAP(ifp, m);
1439         eh = mtod(m, struct ipoib_header *);
1440         /*
1441          * Reset layer specific mbuf flags to avoid confusing upper layers.
1442          * Strip off Infiniband header.
1443          */
1444         m->m_flags &= ~M_VLANTAG;
1445         m->m_flags &= ~(M_PROTOFLAGS);
1446         m_adj(m, IPOIB_HEADER_LEN);
1447
1448         if (IPOIB_IS_MULTICAST(eh->hwaddr)) {
1449                 if (memcmp(eh->hwaddr, ifp->if_broadcastaddr,
1450                     ifp->if_addrlen) == 0)
1451                         m->m_flags |= M_BCAST;
1452                 else
1453                         m->m_flags |= M_MCAST;
1454                 ifp->if_imcasts++;
1455         }
1456
1457         ipoib_demux(ifp, m, ntohs(eh->proto));
1458         CURVNET_RESTORE();
1459 }
1460
1461 static int
1462 ipoib_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
1463         struct sockaddr *sa)
1464 {
1465         struct sockaddr_dl *sdl;
1466 #ifdef INET
1467         struct sockaddr_in *sin;
1468 #endif
1469 #ifdef INET6
1470         struct sockaddr_in6 *sin6;
1471 #endif
1472         u_char *e_addr;
1473
1474         switch(sa->sa_family) {
1475         case AF_LINK:
1476                 /*
1477                  * No mapping needed. Just check that it's a valid MC address.
1478                  */
1479                 sdl = (struct sockaddr_dl *)sa;
1480                 e_addr = LLADDR(sdl);
1481                 if (!IPOIB_IS_MULTICAST(e_addr))
1482                         return EADDRNOTAVAIL;
1483                 *llsa = 0;
1484                 return 0;
1485
1486 #ifdef INET
1487         case AF_INET:
1488                 sin = (struct sockaddr_in *)sa;
1489                 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
1490                         return EADDRNOTAVAIL;
1491                 sdl = malloc(sizeof *sdl, M_IFMADDR,
1492                        M_NOWAIT|M_ZERO);
1493                 if (sdl == NULL)
1494                         return ENOMEM;
1495                 sdl->sdl_len = sizeof *sdl;
1496                 sdl->sdl_family = AF_LINK;
1497                 sdl->sdl_index = ifp->if_index;
1498                 sdl->sdl_type = IFT_INFINIBAND;
1499                 sdl->sdl_alen = INFINIBAND_ALEN;
1500                 e_addr = LLADDR(sdl);
1501                 ip_ib_mc_map(sin->sin_addr.s_addr, ifp->if_broadcastaddr,
1502                     e_addr);
1503                 *llsa = (struct sockaddr *)sdl;
1504                 return 0;
1505 #endif
1506 #ifdef INET6
1507         case AF_INET6:
1508                 sin6 = (struct sockaddr_in6 *)sa;
1509                 /*
1510                  * An IP6 address of 0 means listen to all
1511                  * of the multicast address used for IP6.
1512                  * This has no meaning in ipoib.
1513                  */
1514                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
1515                         return EADDRNOTAVAIL;
1516                 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
1517                         return EADDRNOTAVAIL;
1518                 sdl = malloc(sizeof *sdl, M_IFMADDR,
1519                        M_NOWAIT|M_ZERO);
1520                 if (sdl == NULL)
1521                         return (ENOMEM);
1522                 sdl->sdl_len = sizeof *sdl;
1523                 sdl->sdl_family = AF_LINK;
1524                 sdl->sdl_index = ifp->if_index;
1525                 sdl->sdl_type = IFT_INFINIBAND;
1526                 sdl->sdl_alen = INFINIBAND_ALEN;
1527                 e_addr = LLADDR(sdl);
1528                 ipv6_ib_mc_map(&sin6->sin6_addr, ifp->if_broadcastaddr, e_addr);
1529                 *llsa = (struct sockaddr *)sdl;
1530                 return 0;
1531 #endif
1532
1533         default:
1534                 return EAFNOSUPPORT;
1535         }
1536 }
1537
1538 module_init(ipoib_init_module);
1539 module_exit(ipoib_cleanup_module);