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/slab.h>
  44 #include <linux/kernel.h>
  45 #include <linux/vmalloc.h>
  46
  47 #include <linux/if_arp.h>       /* For ARPHRD_xxx */
  48 #include <linux/if_vlan.h>
  49 #include <net/ip.h>
  50 #include <net/ipv6.h>
  51
  52 MODULE_AUTHOR("Roland Dreier");
  53 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
  54 MODULE_LICENSE("Dual BSD/GPL");
  55
  56 int ipoib_sendq_size = IPOIB_TX_RING_SIZE;
  57 int ipoib_recvq_size = IPOIB_RX_RING_SIZE;
  58
  59 module_param_named(send_queue_size, ipoib_sendq_size, int, 0444);
  60 MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue");
  61 module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444);
  62 MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue");
  63
  64 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
  65 int ipoib_debug_level = 1;
  66
  67 module_param_named(debug_level, ipoib_debug_level, int, 0644);
  68 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
  69 #endif
  70
  71 struct ipoib_path_iter {
  72         struct ipoib_dev_priv *priv;
  73         struct ipoib_path  path;
  74 };
  75
  76 static const u8 ipv4_bcast_addr[] = {
  77         0x00, 0xff, 0xff, 0xff,
  78         0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
  79         0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
  80 };
  81
  82 struct workqueue_struct *ipoib_workqueue;
  83
  84 struct ib_sa_client ipoib_sa_client;
  85
  86 static void ipoib_add_one(struct ib_device *device);
  87 static void ipoib_remove_one(struct ib_device *device);
  88 static void ipoib_start(struct ifnet *dev);
  89 static int ipoib_output(struct ifnet *ifp, struct mbuf *m,
  90             const struct sockaddr *dst, struct route *ro);
  91 static int ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data);
  92 static void ipoib_input(struct ifnet *ifp, struct mbuf *m);
  93
  94 #define IPOIB_MTAP(_ifp, _m)                                    \
  95 do {                                                            \
  96         if (bpf_peers_present((_ifp)->if_bpf)) {                \
  97                 M_ASSERTVALID(_m);                              \
  98                 ipoib_mtap_mb((_ifp), (_m));                    \
  99         }                                                       \
 100 } while (0)
 101
 102 /*
 103  * This is for clients that have an ipoib_header in the mbuf.
 104  */
 105 static void
 106 ipoib_mtap_mb(struct ifnet *ifp, struct mbuf *mb)
 107 {
 108         struct ipoib_header *ih;
 109         struct ether_header eh;
 110
 111         ih = mtod(mb, struct ipoib_header *);
 112         eh.ether_type = ih->proto;
 113         bcopy(ih->hwaddr, &eh.ether_dhost, ETHER_ADDR_LEN);
 114         bzero(&eh.ether_shost, ETHER_ADDR_LEN);
 115         mb->m_data += sizeof(struct ipoib_header);
 116         mb->m_len -= sizeof(struct ipoib_header);
 117         bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb);
 118         mb->m_data -= sizeof(struct ipoib_header);
 119         mb->m_len += sizeof(struct ipoib_header);
 120 }
 121
 122 void
 123 ipoib_mtap_proto(struct ifnet *ifp, struct mbuf *mb, uint16_t proto)
 124 {
 125         struct ether_header eh;
 126
 127         eh.ether_type = proto;
 128         bzero(&eh.ether_shost, ETHER_ADDR_LEN);
 129         bzero(&eh.ether_dhost, ETHER_ADDR_LEN);
 130         bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb);
 131 }
 132
 133 static struct ib_client ipoib_client = {
 134         .name   = "ipoib",
 135         .add    = ipoib_add_one,
 136         .remove = ipoib_remove_one
 137 };
 138
 139 int
 140 ipoib_open(struct ipoib_dev_priv *priv)
 141 {
 142         struct ifnet *dev = priv->dev;
 143
 144         ipoib_dbg(priv, "bringing up interface\n");
 145
 146         set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 147
 148         if (ipoib_pkey_dev_delay_open(priv))
 149                 return 0;
 150
 151         if (ipoib_ib_dev_open(priv))
 152                 goto err_disable;
 153
 154         if (ipoib_ib_dev_up(priv))
 155                 goto err_stop;
 156
 157         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
 158                 struct ipoib_dev_priv *cpriv;
 159
 160                 /* Bring up any child interfaces too */
 161                 mutex_lock(&priv->vlan_mutex);
 162                 list_for_each_entry(cpriv, &priv->child_intfs, list)
 163                         if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) == 0)
 164                                 ipoib_open(cpriv);
 165                 mutex_unlock(&priv->vlan_mutex);
 166         }
 167         dev->if_drv_flags |= IFF_DRV_RUNNING;
 168         dev->if_drv_flags &= ~IFF_DRV_OACTIVE;
 169
 170         return 0;
 171
 172 err_stop:
 173         ipoib_ib_dev_stop(priv, 1);
 174
 175 err_disable:
 176         clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 177
 178         return -EINVAL;
 179 }
 180
 181 static void
 182 ipoib_init(void *arg)
 183 {
 184         struct ifnet *dev;
 185         struct ipoib_dev_priv *priv;
 186
 187         priv = arg;
 188         dev = priv->dev;
 189         if ((dev->if_drv_flags & IFF_DRV_RUNNING) == 0)
 190                 ipoib_open(priv);
 191         queue_work(ipoib_workqueue, &priv->flush_light);
 192 }
 193
 194
 195 static int
 196 ipoib_stop(struct ipoib_dev_priv *priv)
 197 {
 198         struct ifnet *dev = priv->dev;
 199
 200         ipoib_dbg(priv, "stopping interface\n");
 201
 202         clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 203
 204         dev->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 205
 206         ipoib_ib_dev_down(priv, 0);
 207         ipoib_ib_dev_stop(priv, 0);
 208
 209         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
 210                 struct ipoib_dev_priv *cpriv;
 211
 212                 /* Bring down any child interfaces too */
 213                 mutex_lock(&priv->vlan_mutex);
 214                 list_for_each_entry(cpriv, &priv->child_intfs, list)
 215                         if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) != 0)
 216                                 ipoib_stop(cpriv);
 217                 mutex_unlock(&priv->vlan_mutex);
 218         }
 219
 220         return 0;
 221 }
 222
 223 int
 224 ipoib_change_mtu(struct ipoib_dev_priv *priv, int new_mtu)
 225 {
 226         struct ifnet *dev = priv->dev;
 227
 228         /* dev->if_mtu > 2K ==> connected mode */
 229         if (ipoib_cm_admin_enabled(priv)) {
 230                 if (new_mtu > IPOIB_CM_MTU(ipoib_cm_max_mtu(priv)))
 231                         return -EINVAL;
 232
 233                 if (new_mtu > priv->mcast_mtu)
 234                         ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
 235                                    priv->mcast_mtu);
 236
 237                 dev->if_mtu = new_mtu;
 238                 return 0;
 239         }
 240
 241         if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu))
 242                 return -EINVAL;
 243
 244         priv->admin_mtu = new_mtu;
 245
 246         dev->if_mtu = min(priv->mcast_mtu, priv->admin_mtu);
 247
 248         queue_work(ipoib_workqueue, &priv->flush_light);
 249
 250         return 0;
 251 }
 252
 253 static int
 254 ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 255 {
 256         struct ipoib_dev_priv *priv = ifp->if_softc;
 257         struct ifaddr *ifa = (struct ifaddr *) data;
 258         struct ifreq *ifr = (struct ifreq *) data;
 259         int error = 0;
 260
 261         /* check if detaching */
 262         if (priv == NULL || priv->gone != 0)
 263                 return (ENXIO);
 264
 265         switch (command) {
 266         case SIOCSIFFLAGS:
 267                 if (ifp->if_flags & IFF_UP) {
 268                         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
 269                                 error = -ipoib_open(priv);
 270                 } else
 271                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 272                                 ipoib_stop(priv);
 273                 break;
 274         case SIOCADDMULTI:
 275         case SIOCDELMULTI:
 276                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 277                         queue_work(ipoib_workqueue, &priv->restart_task);
 278                 break;
 279         case SIOCSIFADDR:
 280                 ifp->if_flags |= IFF_UP;
 281
 282                 switch (ifa->ifa_addr->sa_family) {
 283 #ifdef INET
 284                 case AF_INET:
 285                         ifp->if_init(ifp->if_softc);    /* before arpwhohas */
 286                         arp_ifinit(ifp, ifa);
 287                         break;
 288 #endif
 289                 default:
 290                         ifp->if_init(ifp->if_softc);
 291                         break;
 292                 }
 293                 break;
 294
 295         case SIOCGIFADDR:
 296                 {
 297                         struct sockaddr *sa;
 298
 299                         sa = (struct sockaddr *) & ifr->ifr_data;
 300                         bcopy(IF_LLADDR(ifp),
 301                               (caddr_t) sa->sa_data, INFINIBAND_ALEN);
 302                 }
 303                 break;
 304
 305         case SIOCSIFMTU:
 306                 /*
 307                  * Set the interface MTU.
 308                  */
 309                 error = -ipoib_change_mtu(priv, ifr->ifr_mtu);
 310                 break;
 311         default:
 312                 error = EINVAL;
 313                 break;
 314         }
 315         return (error);
 316 }
 317
 318
 319 static struct ipoib_path *
 320 __path_find(struct ipoib_dev_priv *priv, void *gid)
 321 {
 322         struct rb_node *n = priv->path_tree.rb_node;
 323         struct ipoib_path *path;
 324         int ret;
 325
 326         while (n) {
 327                 path = rb_entry(n, struct ipoib_path, rb_node);
 328
 329                 ret = memcmp(gid, path->pathrec.dgid.raw,
 330                              sizeof (union ib_gid));
 331
 332                 if (ret < 0)
 333                         n = n->rb_left;
 334                 else if (ret > 0)
 335                         n = n->rb_right;
 336                 else
 337                         return path;
 338         }
 339
 340         return NULL;
 341 }
 342
 343 static int
 344 __path_add(struct ipoib_dev_priv *priv, struct ipoib_path *path)
 345 {
 346         struct rb_node **n = &priv->path_tree.rb_node;
 347         struct rb_node *pn = NULL;
 348         struct ipoib_path *tpath;
 349         int ret;
 350
 351         while (*n) {
 352                 pn = *n;
 353                 tpath = rb_entry(pn, struct ipoib_path, rb_node);
 354
 355                 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
 356                              sizeof (union ib_gid));
 357                 if (ret < 0)
 358                         n = &pn->rb_left;
 359                 else if (ret > 0)
 360                         n = &pn->rb_right;
 361                 else
 362                         return -EEXIST;
 363         }
 364
 365         rb_link_node(&path->rb_node, pn, n);
 366         rb_insert_color(&path->rb_node, &priv->path_tree);
 367
 368         list_add_tail(&path->list, &priv->path_list);
 369
 370         return 0;
 371 }
 372
 373 void
 374 ipoib_path_free(struct ipoib_dev_priv *priv, struct ipoib_path *path)
 375 {
 376
 377         _IF_DRAIN(&path->queue);
 378
 379         if (path->ah)
 380                 ipoib_put_ah(path->ah);
 381         if (ipoib_cm_get(path))
 382                 ipoib_cm_destroy_tx(ipoib_cm_get(path));
 383
 384         kfree(path);
 385 }
 386
 387 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
 388
 389 struct ipoib_path_iter *
 390 ipoib_path_iter_init(struct ipoib_dev_priv *priv)
 391 {
 392         struct ipoib_path_iter *iter;
 393
 394         iter = kmalloc(sizeof *iter, GFP_KERNEL);
 395         if (!iter)
 396                 return NULL;
 397
 398         iter->priv = priv;
 399         memset(iter->path.pathrec.dgid.raw, 0, 16);
 400
 401         if (ipoib_path_iter_next(iter)) {
 402                 kfree(iter);
 403                 return NULL;
 404         }
 405
 406         return iter;
 407 }
 408
 409 int
 410 ipoib_path_iter_next(struct ipoib_path_iter *iter)
 411 {
 412         struct ipoib_dev_priv *priv = iter->priv;
 413         struct rb_node *n;
 414         struct ipoib_path *path;
 415         int ret = 1;
 416
 417         spin_lock_irq(&priv->lock);
 418
 419         n = rb_first(&priv->path_tree);
 420
 421         while (n) {
 422                 path = rb_entry(n, struct ipoib_path, rb_node);
 423
 424                 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
 425                            sizeof (union ib_gid)) < 0) {
 426                         iter->path = *path;
 427                         ret = 0;
 428                         break;
 429                 }
 430
 431                 n = rb_next(n);
 432         }
 433
 434         spin_unlock_irq(&priv->lock);
 435
 436         return ret;
 437 }
 438
 439 void
 440 ipoib_path_iter_read(struct ipoib_path_iter *iter, struct ipoib_path *path)
 441 {
 442         *path = iter->path;
 443 }
 444
 445 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
 446
 447 void
 448 ipoib_mark_paths_invalid(struct ipoib_dev_priv *priv)
 449 {
 450         struct ipoib_path *path, *tp;
 451
 452         spin_lock_irq(&priv->lock);
 453
 454         list_for_each_entry_safe(path, tp, &priv->path_list, list) {
 455                 ipoib_dbg(priv, "mark path LID 0x%04x GID %16D invalid\n",
 456                         be16_to_cpu(path->pathrec.dlid),
 457                         path->pathrec.dgid.raw, ":");
 458                 path->valid =  0;
 459         }
 460
 461         spin_unlock_irq(&priv->lock);
 462 }
 463
 464 void
 465 ipoib_flush_paths(struct ipoib_dev_priv *priv)
 466 {
 467         struct ipoib_path *path, *tp;
 468         LIST_HEAD(remove_list);
 469         unsigned long flags;
 470
 471         spin_lock_irqsave(&priv->lock, flags);
 472
 473         list_splice_init(&priv->path_list, &remove_list);
 474
 475         list_for_each_entry(path, &remove_list, list)
 476                 rb_erase(&path->rb_node, &priv->path_tree);
 477
 478         list_for_each_entry_safe(path, tp, &remove_list, list) {
 479                 if (path->query)
 480                         ib_sa_cancel_query(path->query_id, path->query);
 481                 spin_unlock_irqrestore(&priv->lock, flags);
 482                 wait_for_completion(&path->done);
 483                 ipoib_path_free(priv, path);
 484                 spin_lock_irqsave(&priv->lock, flags);
 485         }
 486
 487         spin_unlock_irqrestore(&priv->lock, flags);
 488 }
 489
 490 static void
 491 path_rec_completion(int status, struct ib_sa_path_rec *pathrec, void *path_ptr)
 492 {
 493         struct ipoib_path *path = path_ptr;
 494         struct ipoib_dev_priv *priv = path->priv;
 495         struct ifnet *dev = priv->dev;
 496         struct ipoib_ah *ah = NULL;
 497         struct ipoib_ah *old_ah = NULL;
 498         struct ifqueue mbqueue;
 499         struct mbuf *mb;
 500         unsigned long flags;
 501
 502         if (!status)
 503                 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %16D\n",
 504                           be16_to_cpu(pathrec->dlid), pathrec->dgid.raw, ":");
 505         else
 506                 ipoib_dbg(priv, "PathRec status %d for GID %16D\n",
 507                           status, path->pathrec.dgid.raw, ":");
 508
 509         bzero(&mbqueue, sizeof(mbqueue));
 510
 511         if (!status) {
 512                 struct ib_ah_attr av;
 513
 514                 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av))
 515                         ah = ipoib_create_ah(priv, priv->pd, &av);
 516         }
 517
 518         spin_lock_irqsave(&priv->lock, flags);
 519
 520         if (ah) {
 521                 path->pathrec = *pathrec;
 522
 523                 old_ah   = path->ah;
 524                 path->ah = ah;
 525
 526                 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
 527                           ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
 528
 529                 for (;;) {
 530                         _IF_DEQUEUE(&path->queue, mb);
 531                         if (mb == NULL)
 532                                 break;
 533                         _IF_ENQUEUE(&mbqueue, mb);
 534                 }
 535
 536 #ifdef CONFIG_INFINIBAND_IPOIB_CM
 537                 if (ipoib_cm_enabled(priv, path->hwaddr) && !ipoib_cm_get(path))
 538                         ipoib_cm_set(path, ipoib_cm_create_tx(priv, path));
 539 #endif
 540
 541                 path->valid = 1;
 542         }
 543
 544         path->query = NULL;
 545         complete(&path->done);
 546
 547         spin_unlock_irqrestore(&priv->lock, flags);
 548
 549         if (old_ah)
 550                 ipoib_put_ah(old_ah);
 551
 552         for (;;) {
 553                 _IF_DEQUEUE(&mbqueue, mb);
 554                 if (mb == NULL)
 555                         break;
 556                 mb->m_pkthdr.rcvif = dev;
 557                 if (dev->if_transmit(dev, mb))
 558                         ipoib_warn(priv, "dev_queue_xmit failed "
 559                                    "to requeue packet\n");
 560         }
 561 }
 562
 563 static struct ipoib_path *
 564 path_rec_create(struct ipoib_dev_priv *priv, uint8_t *hwaddr)
 565 {
 566         struct ipoib_path *path;
 567
 568         if (!priv->broadcast)
 569                 return NULL;
 570
 571         path = kzalloc(sizeof *path, GFP_ATOMIC);
 572         if (!path)
 573                 return NULL;
 574
 575         path->priv = priv;
 576
 577         bzero(&path->queue, sizeof(path->queue));
 578
 579 #ifdef CONFIG_INFINIBAND_IPOIB_CM
 580         memcpy(&path->hwaddr, hwaddr, INFINIBAND_ALEN);
 581 #endif
 582         memcpy(path->pathrec.dgid.raw, &hwaddr[4], sizeof (union ib_gid));
 583         path->pathrec.sgid          = priv->local_gid;
 584         path->pathrec.pkey          = cpu_to_be16(priv->pkey);
 585         path->pathrec.numb_path     = 1;
 586         path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
 587
 588         return path;
 589 }
 590
 591 static int
 592 path_rec_start(struct ipoib_dev_priv *priv, struct ipoib_path *path)
 593 {
 594         struct ifnet *dev = priv->dev;
 595
 596         ib_sa_comp_mask comp_mask = IB_SA_PATH_REC_MTU_SELECTOR | IB_SA_PATH_REC_MTU;
 597         struct ib_sa_path_rec p_rec;
 598
 599         p_rec = path->pathrec;
 600         p_rec.mtu_selector = IB_SA_GT;
 601
 602         switch (roundup_pow_of_two(dev->if_mtu + IPOIB_ENCAP_LEN)) {
 603         case 512:
 604                 p_rec.mtu = IB_MTU_256;
 605                 break;
 606         case 1024:
 607                 p_rec.mtu = IB_MTU_512;
 608                 break;
 609         case 2048:
 610                 p_rec.mtu = IB_MTU_1024;
 611                 break;
 612         case 4096:
 613                 p_rec.mtu = IB_MTU_2048;
 614                 break;
 615         default:
 616                 /* Wildcard everything */
 617                 comp_mask = 0;
 618                 p_rec.mtu = 0;
 619                 p_rec.mtu_selector = 0;
 620         }
 621
 622         ipoib_dbg(priv, "Start path record lookup for %16D MTU > %d\n",
 623                   p_rec.dgid.raw, ":",
 624                   comp_mask ? ib_mtu_enum_to_int(p_rec.mtu) : 0);
 625
 626         init_completion(&path->done);
 627
 628         path->query_id =
 629                 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
 630                                    &p_rec, comp_mask            |
 631                                    IB_SA_PATH_REC_DGID          |
 632                                    IB_SA_PATH_REC_SGID          |
 633                                    IB_SA_PATH_REC_NUMB_PATH     |
 634                                    IB_SA_PATH_REC_TRAFFIC_CLASS |
 635                                    IB_SA_PATH_REC_PKEY,
 636                                    1000, GFP_ATOMIC,
 637                                    path_rec_completion,
 638                                    path, &path->query);
 639         if (path->query_id < 0) {
 640                 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
 641                 path->query = NULL;
 642                 complete(&path->done);
 643                 return path->query_id;
 644         }
 645
 646         return 0;
 647 }
 648
 649 static void
 650 ipoib_unicast_send(struct mbuf *mb, struct ipoib_dev_priv *priv, struct ipoib_header *eh)
 651 {
 652         struct ipoib_path *path;
 653
 654         path = __path_find(priv, eh->hwaddr + 4);
 655         if (!path || !path->valid) {
 656                 int new_path = 0;
 657
 658                 if (!path) {
 659                         path = path_rec_create(priv, eh->hwaddr);
 660                         new_path = 1;
 661                 }
 662                 if (path) {
 663                         if (_IF_QLEN(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE)
 664                                 _IF_ENQUEUE(&path->queue, mb);
 665                         else {
 666                                 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1);
 667                                 m_freem(mb);
 668                         }
 669
 670                         if (!path->query && path_rec_start(priv, path)) {
 671                                 spin_unlock_irqrestore(&priv->lock, flags);
 672                                 if (new_path)
 673                                         ipoib_path_free(priv, path);
 674                                 return;
 675                         } else
 676                                 __path_add(priv, path);
 677                 } else {
 678                         if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1);
 679                         m_freem(mb);
 680                 }
 681
 682                 return;
 683         }
 684
 685         if (ipoib_cm_get(path) && ipoib_cm_up(path)) {
 686                 ipoib_cm_send(priv, mb, ipoib_cm_get(path));
 687         } else if (path->ah) {
 688                 ipoib_send(priv, mb, path->ah, IPOIB_QPN(eh->hwaddr));
 689         } else if ((path->query || !path_rec_start(priv, path)) &&
 690                     path->queue.ifq_len < IPOIB_MAX_PATH_REC_QUEUE) {
 691                 _IF_ENQUEUE(&path->queue, mb);
 692         } else {
 693                 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1);
 694                 m_freem(mb);
 695         }
 696 }
 697
 698 static int
 699 ipoib_send_one(struct ipoib_dev_priv *priv, struct mbuf *mb)
 700 {
 701         struct ipoib_header *eh;
 702
 703         eh = mtod(mb, struct ipoib_header *);
 704         if (IPOIB_IS_MULTICAST(eh->hwaddr)) {
 705                 /* Add in the P_Key for multicast*/
 706                 eh->hwaddr[8] = (priv->pkey >> 8) & 0xff;
 707                 eh->hwaddr[9] = priv->pkey & 0xff;
 708
 709                 ipoib_mcast_send(priv, eh->hwaddr + 4, mb);
 710         } else
 711                 ipoib_unicast_send(mb, priv, eh);
 712
 713         return 0;
 714 }
 715
 716
 717 static void
 718 _ipoib_start(struct ifnet *dev, struct ipoib_dev_priv *priv)
 719 {
 720         struct mbuf *mb;
 721
 722         if ((dev->if_drv_flags & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) !=
 723             IFF_DRV_RUNNING)
 724                 return;
 725
 726         spin_lock(&priv->lock);
 727         while (!IFQ_DRV_IS_EMPTY(&dev->if_snd) &&
 728             (dev->if_drv_flags & IFF_DRV_OACTIVE) == 0) {
 729                 IFQ_DRV_DEQUEUE(&dev->if_snd, mb);
 730                 if (mb == NULL)
 731                         break;
 732                 IPOIB_MTAP(dev, mb);
 733                 ipoib_send_one(priv, mb);
 734         }
 735         spin_unlock(&priv->lock);
 736 }
 737
 738 static void
 739 ipoib_start(struct ifnet *dev)
 740 {
 741         _ipoib_start(dev, dev->if_softc);
 742 }
 743
 744 static void
 745 ipoib_vlan_start(struct ifnet *dev)
 746 {
 747         struct ipoib_dev_priv *priv;
 748         struct mbuf *mb;
 749
 750         priv = VLAN_COOKIE(dev);
 751         if (priv != NULL)
 752                 return _ipoib_start(dev, priv);
 753         while (!IFQ_DRV_IS_EMPTY(&dev->if_snd)) {
 754                 IFQ_DRV_DEQUEUE(&dev->if_snd, mb);
 755                 if (mb == NULL)
 756                         break;
 757                 m_freem(mb);
 758                 if_inc_counter(dev, IFCOUNTER_OERRORS, 1);
 759         }
 760 }
 761
 762 int
 763 ipoib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port)
 764 {
 765
 766         /* Allocate RX/TX "rings" to hold queued mbs */
 767         priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
 768                                 GFP_KERNEL);
 769         if (!priv->rx_ring) {
 770                 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
 771                        ca->name, ipoib_recvq_size);
 772                 goto out;
 773         }
 774
 775         priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, GFP_KERNEL);
 776         if (!priv->tx_ring) {
 777                 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
 778                        ca->name, ipoib_sendq_size);
 779                 goto out_rx_ring_cleanup;
 780         }
 781         memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring);
 782
 783         /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
 784
 785         if (ipoib_ib_dev_init(priv, ca, port))
 786                 goto out_tx_ring_cleanup;
 787
 788         return 0;
 789
 790 out_tx_ring_cleanup:
 791         kfree(priv->tx_ring);
 792
 793 out_rx_ring_cleanup:
 794         kfree(priv->rx_ring);
 795
 796 out:
 797         return -ENOMEM;
 798 }
 799
 800 static void
 801 ipoib_detach(struct ipoib_dev_priv *priv)
 802 {
 803         struct ifnet *dev;
 804
 805         dev = priv->dev;
 806         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
 807                 priv->gone = 1;
 808                 bpfdetach(dev);
 809                 if_detach(dev);
 810                 if_free(dev);
 811         } else
 812                 VLAN_SETCOOKIE(priv->dev, NULL);
 813
 814         free(priv, M_TEMP);
 815 }
 816
 817 void
 818 ipoib_dev_cleanup(struct ipoib_dev_priv *priv)
 819 {
 820         struct ipoib_dev_priv *cpriv, *tcpriv;
 821
 822         /* Delete any child interfaces first */
 823         list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
 824                 ipoib_dev_cleanup(cpriv);
 825                 ipoib_detach(cpriv);
 826         }
 827
 828         ipoib_ib_dev_cleanup(priv);
 829
 830         kfree(priv->rx_ring);
 831         kfree(priv->tx_ring);
 832
 833         priv->rx_ring = NULL;
 834         priv->tx_ring = NULL;
 835 }
 836
 837 static volatile int ipoib_unit;
 838
 839 static struct ipoib_dev_priv *
 840 ipoib_priv_alloc(void)
 841 {
 842         struct ipoib_dev_priv *priv;
 843
 844         priv = malloc(sizeof(struct ipoib_dev_priv), M_TEMP, M_ZERO|M_WAITOK);
 845         spin_lock_init(&priv->lock);
 846         spin_lock_init(&priv->drain_lock);
 847         mutex_init(&priv->vlan_mutex);
 848         INIT_LIST_HEAD(&priv->path_list);
 849         INIT_LIST_HEAD(&priv->child_intfs);
 850         INIT_LIST_HEAD(&priv->dead_ahs);
 851         INIT_LIST_HEAD(&priv->multicast_list);
 852         INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll);
 853         INIT_DELAYED_WORK(&priv->mcast_task,   ipoib_mcast_join_task);
 854         INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
 855         INIT_WORK(&priv->flush_light,   ipoib_ib_dev_flush_light);
 856         INIT_WORK(&priv->flush_normal,   ipoib_ib_dev_flush_normal);
 857         INIT_WORK(&priv->flush_heavy,   ipoib_ib_dev_flush_heavy);
 858         INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
 859         INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
 860         memcpy(priv->broadcastaddr, ipv4_bcast_addr, INFINIBAND_ALEN);
 861
 862         return (priv);
 863 }
 864
 865 struct ipoib_dev_priv *
 866 ipoib_intf_alloc(const char *name)
 867 {
 868         struct ipoib_dev_priv *priv;
 869         struct sockaddr_dl *sdl;
 870         struct ifnet *dev;
 871
 872         priv = ipoib_priv_alloc();
 873         dev = priv->dev = if_alloc(IFT_INFINIBAND);
 874         if (!dev) {
 875                 free(priv, M_TEMP);
 876                 return NULL;
 877         }
 878         dev->if_softc = priv;
 879         if_initname(dev, name, atomic_fetchadd_int(&ipoib_unit, 1));
 880         dev->if_flags = IFF_BROADCAST | IFF_MULTICAST;
 881         dev->if_addrlen = INFINIBAND_ALEN;
 882         dev->if_hdrlen = IPOIB_HEADER_LEN;
 883         if_attach(dev);
 884         dev->if_init = ipoib_init;
 885         dev->if_ioctl = ipoib_ioctl;
 886         dev->if_start = ipoib_start;
 887         dev->if_output = ipoib_output;
 888         dev->if_input = ipoib_input;
 889         dev->if_resolvemulti = ipoib_resolvemulti;
 890         dev->if_baudrate = IF_Gbps(10);
 891         dev->if_broadcastaddr = priv->broadcastaddr;
 892         dev->if_snd.ifq_maxlen = ipoib_sendq_size * 2;
 893         sdl = (struct sockaddr_dl *)dev->if_addr->ifa_addr;
 894         sdl->sdl_type = IFT_INFINIBAND;
 895         sdl->sdl_alen = dev->if_addrlen;
 896         priv->dev = dev;
 897         if_link_state_change(dev, LINK_STATE_DOWN);
 898         bpfattach(dev, DLT_EN10MB, ETHER_HDR_LEN);
 899
 900         return dev->if_softc;
 901 }
 902
 903 int
 904 ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca)
 905 {
 906         struct ib_device_attr *device_attr;
 907         int result = -ENOMEM;
 908
 909         device_attr = kmalloc(sizeof *device_attr, GFP_KERNEL);
 910         if (!device_attr) {
 911                 printk(KERN_WARNING "%s: allocation of %zu bytes failed\n",
 912                        hca->name, sizeof *device_attr);
 913                 return result;
 914         }
 915
 916         result = ib_query_device(hca, device_attr);
 917         if (result) {
 918                 printk(KERN_WARNING "%s: ib_query_device failed (ret = %d)\n",
 919                        hca->name, result);
 920                 kfree(device_attr);
 921                 return result;
 922         }
 923         priv->hca_caps = device_attr->device_cap_flags;
 924
 925         kfree(device_attr);
 926
 927         priv->dev->if_hwassist = 0;
 928         priv->dev->if_capabilities = 0;
 929
 930 #ifndef CONFIG_INFINIBAND_IPOIB_CM
 931         if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
 932                 set_bit(IPOIB_FLAG_CSUM, &priv->flags);
 933                 priv->dev->if_hwassist = CSUM_IP | CSUM_TCP | CSUM_UDP;
 934                 priv->dev->if_capabilities = IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM;
 935         }
 936
 937 #if 0
 938         if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO) {
 939                 priv->dev->if_capabilities |= IFCAP_TSO4;
 940                 priv->dev->if_hwassist |= CSUM_TSO;
 941         }
 942 #endif
 943 #endif
 944         priv->dev->if_capabilities |=
 945             IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_LINKSTATE;
 946         priv->dev->if_capenable = priv->dev->if_capabilities;
 947
 948         return 0;
 949 }
 950
 951
 952 static struct ifnet *
 953 ipoib_add_port(const char *format, struct ib_device *hca, u8 port)
 954 {
 955         struct ipoib_dev_priv *priv;
 956         struct ib_port_attr attr;
 957         int result = -ENOMEM;
 958
 959         priv = ipoib_intf_alloc(format);
 960         if (!priv)
 961                 goto alloc_mem_failed;
 962
 963         if (!ib_query_port(hca, port, &attr))
 964                 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
 965         else {
 966                 printk(KERN_WARNING "%s: ib_query_port %d failed\n",
 967                        hca->name, port);
 968                 goto device_init_failed;
 969         }
 970
 971         /* MTU will be reset when mcast join happens */
 972         priv->dev->if_mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
 973         priv->mcast_mtu = priv->admin_mtu = priv->dev->if_mtu;
 974
 975         result = ib_query_pkey(hca, port, 0, &priv->pkey);
 976         if (result) {
 977                 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
 978                        hca->name, port, result);
 979                 goto device_init_failed;
 980         }
 981
 982         if (ipoib_set_dev_features(priv, hca))
 983                 goto device_init_failed;
 984
 985         /*
 986          * Set the full membership bit, so that we join the right
 987          * broadcast group, etc.
 988          */
 989         priv->pkey |= 0x8000;
 990
 991         priv->broadcastaddr[8] = priv->pkey >> 8;
 992         priv->broadcastaddr[9] = priv->pkey & 0xff;
 993
 994         result = ib_query_gid(hca, port, 0, &priv->local_gid);
 995         if (result) {
 996                 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
 997                        hca->name, port, result);
 998                 goto device_init_failed;
 999         }
1000         memcpy(IF_LLADDR(priv->dev) + 4, priv->local_gid.raw, sizeof (union ib_gid));
1001
1002         result = ipoib_dev_init(priv, hca, port);
1003         if (result < 0) {
1004                 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
1005                        hca->name, port, result);
1006                 goto device_init_failed;
1007         }
1008         if (ipoib_cm_admin_enabled(priv))
1009                 priv->dev->if_mtu = IPOIB_CM_MTU(ipoib_cm_max_mtu(priv));
1010
1011         INIT_IB_EVENT_HANDLER(&priv->event_handler,
1012                               priv->ca, ipoib_event);
1013         result = ib_register_event_handler(&priv->event_handler);
1014         if (result < 0) {
1015                 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1016                        "port %d (ret = %d)\n",
1017                        hca->name, port, result);
1018                 goto event_failed;
1019         }
1020         if_printf(priv->dev, "Attached to %s port %d\n", hca->name, port);
1021
1022         return priv->dev;
1023
1024 event_failed:
1025         ipoib_dev_cleanup(priv);
1026
1027 device_init_failed:
1028         ipoib_detach(priv);
1029
1030 alloc_mem_failed:
1031         return ERR_PTR(result);
1032 }
1033
1034 static void
1035 ipoib_add_one(struct ib_device *device)
1036 {
1037         struct list_head *dev_list;
1038         struct ifnet *dev;
1039         struct ipoib_dev_priv *priv;
1040         int s, e, p;
1041
1042         if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1043                 return;
1044
1045         dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1046         if (!dev_list)
1047                 return;
1048
1049         INIT_LIST_HEAD(dev_list);
1050
1051         if (device->node_type == RDMA_NODE_IB_SWITCH) {
1052                 s = 0;
1053                 e = 0;
1054         } else {
1055                 s = 1;
1056                 e = device->phys_port_cnt;
1057         }
1058
1059         for (p = s; p <= e; ++p) {
1060                 if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND)
1061                         continue;
1062                 dev = ipoib_add_port("ib", device, p);
1063                 if (!IS_ERR(dev)) {
1064                         priv = dev->if_softc;
1065                         list_add_tail(&priv->list, dev_list);
1066                 }
1067         }
1068
1069         ib_set_client_data(device, &ipoib_client, dev_list);
1070 }
1071
1072 static void
1073 ipoib_remove_one(struct ib_device *device)
1074 {
1075         struct ipoib_dev_priv *priv, *tmp;
1076         struct list_head *dev_list;
1077
1078         if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1079                 return;
1080
1081         dev_list = ib_get_client_data(device, &ipoib_client);
1082
1083         list_for_each_entry_safe(priv, tmp, dev_list, list) {
1084                 if (rdma_port_get_link_layer(device, priv->port) != IB_LINK_LAYER_INFINIBAND)
1085                         continue;
1086
1087                 ipoib_stop(priv);
1088
1089                 ib_unregister_event_handler(&priv->event_handler);
1090
1091                 /* dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); */
1092
1093                 flush_workqueue(ipoib_workqueue);
1094
1095                 ipoib_dev_cleanup(priv);
1096                 ipoib_detach(priv);
1097         }
1098
1099         kfree(dev_list);
1100 }
1101
1102 static void
1103 ipoib_config_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
1104 {
1105         struct ipoib_dev_priv *parent;
1106         struct ipoib_dev_priv *priv;
1107         struct ifnet *dev;
1108         uint16_t pkey;
1109         int error;
1110
1111         if (ifp->if_type != IFT_INFINIBAND)
1112                 return;
1113         dev = VLAN_DEVAT(ifp, vtag);
1114         if (dev == NULL)
1115                 return;
1116         priv = NULL;
1117         error = 0;
1118         parent = ifp->if_softc;
1119         /* We only support 15 bits of pkey. */
1120         if (vtag & 0x8000)
1121                 return;
1122         pkey = vtag | 0x8000;   /* Set full membership bit. */
1123         if (pkey == parent->pkey)
1124                 return;
1125         /* Check for dups */
1126         mutex_lock(&parent->vlan_mutex);
1127         list_for_each_entry(priv, &parent->child_intfs, list) {
1128                 if (priv->pkey == pkey) {
1129                         priv = NULL;
1130                         error = EBUSY;
1131                         goto out;
1132                 }
1133         }
1134         priv = ipoib_priv_alloc();
1135         priv->dev = dev;
1136         priv->max_ib_mtu = parent->max_ib_mtu;
1137         priv->mcast_mtu = priv->admin_mtu = parent->dev->if_mtu;
1138         set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
1139         error = ipoib_set_dev_features(priv, parent->ca);
1140         if (error)
1141                 goto out;
1142         priv->pkey = pkey;
1143         priv->broadcastaddr[8] = pkey >> 8;
1144         priv->broadcastaddr[9] = pkey & 0xff;
1145         dev->if_broadcastaddr = priv->broadcastaddr;
1146         error = ipoib_dev_init(priv, parent->ca, parent->port);
1147         if (error)
1148                 goto out;
1149         priv->parent = parent->dev;
1150         list_add_tail(&priv->list, &parent->child_intfs);
1151         VLAN_SETCOOKIE(dev, priv);
1152         dev->if_start = ipoib_vlan_start;
1153         dev->if_drv_flags &= ~IFF_DRV_RUNNING;
1154         dev->if_hdrlen = IPOIB_HEADER_LEN;
1155         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1156                 ipoib_open(priv);
1157         mutex_unlock(&parent->vlan_mutex);
1158         return;
1159 out:
1160         mutex_unlock(&parent->vlan_mutex);
1161         if (priv)
1162                 free(priv, M_TEMP);
1163         if (error)
1164                 ipoib_warn(parent,
1165                     "failed to initialize subinterface: device %s, port %d vtag 0x%X",
1166                     parent->ca->name, parent->port, vtag);
1167         return;
1168 }
1169
1170 static void
1171 ipoib_unconfig_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
1172 {
1173         struct ipoib_dev_priv *parent;
1174         struct ipoib_dev_priv *priv;
1175         struct ifnet *dev;
1176         uint16_t pkey;
1177
1178         if (ifp->if_type != IFT_INFINIBAND)
1179                 return;
1180
1181         dev = VLAN_DEVAT(ifp, vtag);
1182         if (dev)
1183                 VLAN_SETCOOKIE(dev, NULL);
1184         pkey = vtag | 0x8000;
1185         parent = ifp->if_softc;
1186         mutex_lock(&parent->vlan_mutex);
1187         list_for_each_entry(priv, &parent->child_intfs, list) {
1188                 if (priv->pkey == pkey) {
1189                         ipoib_dev_cleanup(priv);
1190                         list_del(&priv->list);
1191                         break;
1192                 }
1193         }
1194         mutex_unlock(&parent->vlan_mutex);
1195 }
1196
1197 eventhandler_tag ipoib_vlan_attach;
1198 eventhandler_tag ipoib_vlan_detach;
1199
1200 static int __init
1201 ipoib_init_module(void)
1202 {
1203         int ret;
1204
1205         ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
1206         ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
1207         ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
1208
1209         ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
1210         ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
1211         ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE,
1212                                                      IPOIB_MIN_QUEUE_SIZE));
1213 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1214         ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
1215 #endif
1216
1217         ipoib_vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
1218                 ipoib_config_vlan, NULL, EVENTHANDLER_PRI_FIRST);
1219         ipoib_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
1220                 ipoib_unconfig_vlan, NULL, EVENTHANDLER_PRI_FIRST);
1221
1222         /*
1223          * We create our own workqueue mainly because we want to be
1224          * able to flush it when devices are being removed.  We can't
1225          * use schedule_work()/flush_scheduled_work() because both
1226          * unregister_netdev() and linkwatch_event take the rtnl lock,
1227          * so flush_scheduled_work() can deadlock during device
1228          * removal.
1229          */
1230         ipoib_workqueue = create_singlethread_workqueue("ipoib");
1231         if (!ipoib_workqueue) {
1232                 ret = -ENOMEM;
1233                 goto err_fs;
1234         }
1235
1236         ib_sa_register_client(&ipoib_sa_client);
1237
1238         ret = ib_register_client(&ipoib_client);
1239         if (ret)
1240                 goto err_sa;
1241
1242         return 0;
1243
1244 err_sa:
1245         ib_sa_unregister_client(&ipoib_sa_client);
1246         destroy_workqueue(ipoib_workqueue);
1247
1248 err_fs:
1249         return ret;
1250 }
1251
1252 static void __exit
1253 ipoib_cleanup_module(void)
1254 {
1255
1256         EVENTHANDLER_DEREGISTER(vlan_config, ipoib_vlan_attach);
1257         EVENTHANDLER_DEREGISTER(vlan_unconfig, ipoib_vlan_detach);
1258         ib_unregister_client(&ipoib_client);
1259         ib_sa_unregister_client(&ipoib_sa_client);
1260         destroy_workqueue(ipoib_workqueue);
1261 }
1262
1263 /*
1264  * Infiniband output routine.
1265  */
1266 static int
1267 ipoib_output(struct ifnet *ifp, struct mbuf *m,
1268         const struct sockaddr *dst, struct route *ro)
1269 {
1270         u_char edst[INFINIBAND_ALEN];
1271 #if defined(INET) || defined(INET6)
1272         struct llentry *lle = NULL;
1273 #endif
1274         struct ipoib_header *eh;
1275         int error = 0, is_gw = 0;
1276         short type;
1277
1278         if (ro != NULL)
1279                 is_gw = (ro->ro_flags & RT_HAS_GW) != 0;
1280 #ifdef MAC
1281         error = mac_ifnet_check_transmit(ifp, m);
1282         if (error)
1283                 goto bad;
1284 #endif
1285
1286         M_PROFILE(m);
1287         if (ifp->if_flags & IFF_MONITOR) {
1288                 error = ENETDOWN;
1289                 goto bad;
1290         }
1291         if (!((ifp->if_flags & IFF_UP) &&
1292             (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
1293                 error = ENETDOWN;
1294                 goto bad;
1295         }
1296
1297         switch (dst->sa_family) {
1298 #ifdef INET
1299         case AF_INET:
1300                 if (lle != NULL && (lle->la_flags & LLE_VALID))
1301                         memcpy(edst, lle->ll_addr, sizeof(edst));
1302                 else if (m->m_flags & M_MCAST)
1303                         ip_ib_mc_map(((struct sockaddr_in *)dst)->sin_addr.s_addr, ifp->if_broadcastaddr, edst);
1304                 else
1305                         error = arpresolve(ifp, is_gw, m, dst, edst, NULL, NULL);
1306                 if (error)
1307                         return (error == EWOULDBLOCK ? 0 : error);
1308                 type = htons(ETHERTYPE_IP);
1309                 break;
1310         case AF_ARP:
1311         {
1312                 struct arphdr *ah;
1313                 ah = mtod(m, struct arphdr *);
1314                 ah->ar_hrd = htons(ARPHRD_INFINIBAND);
1315
1316                 switch(ntohs(ah->ar_op)) {
1317                 case ARPOP_REVREQUEST:
1318                 case ARPOP_REVREPLY:
1319                         type = htons(ETHERTYPE_REVARP);
1320                         break;
1321                 case ARPOP_REQUEST:
1322                 case ARPOP_REPLY:
1323                 default:
1324                         type = htons(ETHERTYPE_ARP);
1325                         break;
1326                 }
1327
1328                 if (m->m_flags & M_BCAST)
1329                         bcopy(ifp->if_broadcastaddr, edst, INFINIBAND_ALEN);
1330                 else
1331                         bcopy(ar_tha(ah), edst, INFINIBAND_ALEN);
1332
1333         }
1334         break;
1335 #endif
1336 #ifdef INET6
1337         case AF_INET6:
1338                 if (lle != NULL && (lle->la_flags & LLE_VALID))
1339                         memcpy(edst, lle->ll_addr, sizeof(edst));
1340                 else if (m->m_flags & M_MCAST)
1341                         ipv6_ib_mc_map(&((struct sockaddr_in6 *)dst)->sin6_addr, ifp->if_broadcastaddr, edst);
1342                 else
1343                         error = nd6_resolve(ifp, is_gw, m, dst, edst, NULL, NULL);
1344                 if (error)
1345                         return error;
1346                 type = htons(ETHERTYPE_IPV6);
1347                 break;
1348 #endif
1349
1350         default:
1351                 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
1352                 error = EAFNOSUPPORT;
1353                 goto bad;
1354         }
1355
1356         /*
1357          * Add local net header.  If no space in first mbuf,
1358          * allocate another.
1359          */
1360         M_PREPEND(m, IPOIB_HEADER_LEN, M_NOWAIT);
1361         if (m == NULL) {
1362                 error = ENOBUFS;
1363                 goto bad;
1364         }
1365         eh = mtod(m, struct ipoib_header *);
1366         (void)memcpy(&eh->proto, &type, sizeof(eh->proto));
1367         (void)memcpy(&eh->hwaddr, edst, sizeof (edst));
1368
1369         /*
1370          * Queue message on interface, update output statistics if
1371          * successful, and start output if interface not yet active.
1372          */
1373         return ((ifp->if_transmit)(ifp, m));
1374 bad:
1375         if (m != NULL)
1376                 m_freem(m);
1377         return (error);
1378 }
1379
1380 /*
1381  * Upper layer processing for a received Infiniband packet.
1382  */
1383 void
1384 ipoib_demux(struct ifnet *ifp, struct mbuf *m, u_short proto)
1385 {
1386         int isr;
1387
1388 #ifdef MAC
1389         /*
1390          * Tag the mbuf with an appropriate MAC label before any other
1391          * consumers can get to it.
1392          */
1393         mac_ifnet_create_mbuf(ifp, m);
1394 #endif
1395         /* Allow monitor mode to claim this frame, after stats are updated. */
1396         if (ifp->if_flags & IFF_MONITOR) {
1397                 if_printf(ifp, "discard frame at IFF_MONITOR\n");
1398                 m_freem(m);
1399                 return;
1400         }
1401         /*
1402          * Dispatch frame to upper layer.
1403          */
1404         switch (proto) {
1405 #ifdef INET
1406         case ETHERTYPE_IP:
1407                 isr = NETISR_IP;
1408                 break;
1409
1410         case ETHERTYPE_ARP:
1411                 if (ifp->if_flags & IFF_NOARP) {
1412                         /* Discard packet if ARP is disabled on interface */
1413                         m_freem(m);
1414                         return;
1415                 }
1416                 isr = NETISR_ARP;
1417                 break;
1418 #endif
1419 #ifdef INET6
1420         case ETHERTYPE_IPV6:
1421                 isr = NETISR_IPV6;
1422                 break;
1423 #endif
1424         default:
1425                 goto discard;
1426         }
1427         netisr_dispatch(isr, m);
1428         return;
1429
1430 discard:
1431         m_freem(m);
1432 }
1433
1434 /*
1435  * Process a received Infiniband packet.
1436  */
1437 static void
1438 ipoib_input(struct ifnet *ifp, struct mbuf *m)
1439 {
1440         struct ipoib_header *eh;
1441
1442         if ((ifp->if_flags & IFF_UP) == 0) {
1443                 m_freem(m);
1444                 return;
1445         }
1446         CURVNET_SET_QUIET(ifp->if_vnet);
1447
1448         /* Let BPF have it before we strip the header. */
1449         IPOIB_MTAP(ifp, m);
1450         eh = mtod(m, struct ipoib_header *);
1451         /*
1452          * Reset layer specific mbuf flags to avoid confusing upper layers.
1453          * Strip off Infiniband header.
1454          */
1455         m->m_flags &= ~M_VLANTAG;
1456         m_clrprotoflags(m);
1457         m_adj(m, IPOIB_HEADER_LEN);
1458
1459         if (IPOIB_IS_MULTICAST(eh->hwaddr)) {
1460                 if (memcmp(eh->hwaddr, ifp->if_broadcastaddr,
1461                     ifp->if_addrlen) == 0)
1462                         m->m_flags |= M_BCAST;
1463                 else
1464                         m->m_flags |= M_MCAST;
1465                 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
1466         }
1467
1468         ipoib_demux(ifp, m, ntohs(eh->proto));
1469         CURVNET_RESTORE();
1470 }
1471
1472 static int
1473 ipoib_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
1474         struct sockaddr *sa)
1475 {
1476         struct sockaddr_dl *sdl;
1477 #ifdef INET
1478         struct sockaddr_in *sin;
1479 #endif
1480 #ifdef INET6
1481         struct sockaddr_in6 *sin6;
1482 #endif
1483         u_char *e_addr;
1484
1485         switch(sa->sa_family) {
1486         case AF_LINK:
1487                 /*
1488                  * No mapping needed. Just check that it's a valid MC address.
1489                  */
1490                 sdl = (struct sockaddr_dl *)sa;
1491                 e_addr = LLADDR(sdl);
1492                 if (!IPOIB_IS_MULTICAST(e_addr))
1493                         return EADDRNOTAVAIL;
1494                 *llsa = NULL;
1495                 return 0;
1496
1497 #ifdef INET
1498         case AF_INET:
1499                 sin = (struct sockaddr_in *)sa;
1500                 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
1501                         return EADDRNOTAVAIL;
1502                 sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND);
1503                 sdl->sdl_alen = INFINIBAND_ALEN;
1504                 e_addr = LLADDR(sdl);
1505                 ip_ib_mc_map(sin->sin_addr.s_addr, ifp->if_broadcastaddr,
1506                     e_addr);
1507                 *llsa = (struct sockaddr *)sdl;
1508                 return 0;
1509 #endif
1510 #ifdef INET6
1511         case AF_INET6:
1512                 sin6 = (struct sockaddr_in6 *)sa;
1513                 /*
1514                  * An IP6 address of 0 means listen to all
1515                  * of the multicast address used for IP6.
1516                  * This has no meaning in ipoib.
1517                  */
1518                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
1519                         return EADDRNOTAVAIL;
1520                 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
1521                         return EADDRNOTAVAIL;
1522                 sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND);
1523                 sdl->sdl_alen = INFINIBAND_ALEN;
1524                 e_addr = LLADDR(sdl);
1525                 ipv6_ib_mc_map(&sin6->sin6_addr, ifp->if_broadcastaddr, e_addr);
1526                 *llsa = (struct sockaddr *)sdl;
1527                 return 0;
1528 #endif
1529
1530         default:
1531                 return EAFNOSUPPORT;
1532         }
1533 }
1534
1535 module_init(ipoib_init_module);
1536 module_exit(ipoib_cleanup_module);
1537
1538 static int
1539 ipoib_evhand(module_t mod, int event, void *arg)
1540 {
1541                         return (0);
1542 }
1543
1544 static moduledata_t ipoib_mod = {
1545                         .name = "ipoib",
1546                                         .evhand = ipoib_evhand,
1547 };
1548
1549 DECLARE_MODULE(ipoib, ipoib_mod, SI_SUB_LAST, SI_ORDER_ANY);
1550 MODULE_DEPEND(ipoib, ibcore, 1, 1, 1);
1551 MODULE_DEPEND(ipoib, linuxkpi, 1, 1, 1);