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

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
   3  *
   4  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   5  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   6  * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
   7  *
   8  * This software is available to you under a choice of one of two
   9  * licenses.  You may choose to be licensed under the terms of the GNU
  10  * General Public License (GPL) Version 2, available from the file
  11  * COPYING in the main directory of this source tree, or the
  12  * OpenIB.org BSD license below:
  13  *
  14  *     Redistribution and use in source and binary forms, with or
  15  *     without modification, are permitted provided that the following
  16  *     conditions are met:
  17  *
  18  *      - Redistributions of source code must retain the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer.
  21  *
  22  *      - Redistributions in binary form must reproduce the above
  23  *        copyright notice, this list of conditions and the following
  24  *        disclaimer in the documentation and/or other materials
  25  *        provided with the distribution.
  26  *
  27  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  31  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  32  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  33  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  34  * SOFTWARE.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD$");
  39
  40 #include "ipoib.h"
  41 #include <sys/eventhandler.h>
  42
  43 static  int ipoib_resolvemulti(struct ifnet *, struct sockaddr **,
  44                 struct sockaddr *);
  45
  46
  47 #include <linux/module.h>
  48
  49 #include <linux/slab.h>
  50 #include <linux/kernel.h>
  51 #include <linux/vmalloc.h>
  52
  53 #include <linux/if_arp.h>       /* For ARPHRD_xxx */
  54 #include <linux/if_vlan.h>
  55 #include <net/ip.h>
  56 #include <net/ipv6.h>
  57
  58 #include <rdma/ib_cache.h>
  59
  60 MODULE_AUTHOR("Roland Dreier");
  61 MODULE_DESCRIPTION("IP-over-InfiniBand net driver");
  62 MODULE_LICENSE("Dual BSD/GPL");
  63
  64 int ipoib_sendq_size = IPOIB_TX_RING_SIZE;
  65 int ipoib_recvq_size = IPOIB_RX_RING_SIZE;
  66
  67 module_param_named(send_queue_size, ipoib_sendq_size, int, 0444);
  68 MODULE_PARM_DESC(send_queue_size, "Number of descriptors in send queue");
  69 module_param_named(recv_queue_size, ipoib_recvq_size, int, 0444);
  70 MODULE_PARM_DESC(recv_queue_size, "Number of descriptors in receive queue");
  71
  72 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
  73 int ipoib_debug_level = 1;
  74
  75 module_param_named(debug_level, ipoib_debug_level, int, 0644);
  76 MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
  77 #endif
  78
  79 struct ipoib_path_iter {
  80         struct ipoib_dev_priv *priv;
  81         struct ipoib_path  path;
  82 };
  83
  84 static const u8 ipv4_bcast_addr[] = {
  85         0x00, 0xff, 0xff, 0xff,
  86         0xff, 0x12, 0x40, 0x1b, 0x00, 0x00, 0x00, 0x00,
  87         0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
  88 };
  89
  90 struct workqueue_struct *ipoib_workqueue;
  91
  92 struct ib_sa_client ipoib_sa_client;
  93
  94 static void ipoib_add_one(struct ib_device *device);
  95 static void ipoib_remove_one(struct ib_device *device, void *client_data);
  96 static struct net_device *ipoib_get_net_dev_by_params(
  97                 struct ib_device *dev, u8 port, u16 pkey,
  98                 const union ib_gid *gid, const struct sockaddr *addr,
  99                 void *client_data);
 100 static void ipoib_start(struct ifnet *dev);
 101 static int ipoib_output(struct ifnet *ifp, struct mbuf *m,
 102             const struct sockaddr *dst, struct route *ro);
 103 static int ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data);
 104 static void ipoib_input(struct ifnet *ifp, struct mbuf *m);
 105
 106 #define IPOIB_MTAP(_ifp, _m)                                    \
 107 do {                                                            \
 108         if (bpf_peers_present((_ifp)->if_bpf)) {                \
 109                 M_ASSERTVALID(_m);                              \
 110                 ipoib_mtap_mb((_ifp), (_m));                    \
 111         }                                                       \
 112 } while (0)
 113
 114 static struct unrhdr *ipoib_unrhdr;
 115
 116 static void
 117 ipoib_unrhdr_init(void *arg)
 118 {
 119
 120         ipoib_unrhdr = new_unrhdr(0, 65535, NULL);
 121 }
 122 SYSINIT(ipoib_unrhdr_init, SI_SUB_KLD - 1, SI_ORDER_ANY, ipoib_unrhdr_init, NULL);
 123
 124 static void
 125 ipoib_unrhdr_uninit(void *arg)
 126 {
 127
 128         if (ipoib_unrhdr != NULL) {
 129                 struct unrhdr *hdr;
 130
 131                 hdr = ipoib_unrhdr;
 132                 ipoib_unrhdr = NULL;
 133
 134                 delete_unrhdr(hdr);
 135         }
 136 }
 137 SYSUNINIT(ipoib_unrhdr_uninit, SI_SUB_KLD - 1, SI_ORDER_ANY, ipoib_unrhdr_uninit, NULL);
 138
 139 /*
 140  * This is for clients that have an ipoib_header in the mbuf.
 141  */
 142 static void
 143 ipoib_mtap_mb(struct ifnet *ifp, struct mbuf *mb)
 144 {
 145         struct ipoib_header *ih;
 146         struct ether_header eh;
 147
 148         ih = mtod(mb, struct ipoib_header *);
 149         eh.ether_type = ih->proto;
 150         bcopy(ih->hwaddr, &eh.ether_dhost, ETHER_ADDR_LEN);
 151         bzero(&eh.ether_shost, ETHER_ADDR_LEN);
 152         mb->m_data += sizeof(struct ipoib_header);
 153         mb->m_len -= sizeof(struct ipoib_header);
 154         bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb);
 155         mb->m_data -= sizeof(struct ipoib_header);
 156         mb->m_len += sizeof(struct ipoib_header);
 157 }
 158
 159 void
 160 ipoib_mtap_proto(struct ifnet *ifp, struct mbuf *mb, uint16_t proto)
 161 {
 162         struct ether_header eh;
 163
 164         eh.ether_type = proto;
 165         bzero(&eh.ether_shost, ETHER_ADDR_LEN);
 166         bzero(&eh.ether_dhost, ETHER_ADDR_LEN);
 167         bpf_mtap2(ifp->if_bpf, &eh, sizeof(eh), mb);
 168 }
 169
 170 static struct ib_client ipoib_client = {
 171         .name   = "ipoib",
 172         .add    = ipoib_add_one,
 173         .remove = ipoib_remove_one,
 174         .get_net_dev_by_params = ipoib_get_net_dev_by_params,
 175 };
 176
 177 int
 178 ipoib_open(struct ipoib_dev_priv *priv)
 179 {
 180         struct ifnet *dev = priv->dev;
 181
 182         ipoib_dbg(priv, "bringing up interface\n");
 183
 184         set_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 185
 186         if (ipoib_pkey_dev_delay_open(priv))
 187                 return 0;
 188
 189         if (ipoib_ib_dev_open(priv))
 190                 goto err_disable;
 191
 192         if (ipoib_ib_dev_up(priv))
 193                 goto err_stop;
 194
 195         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
 196                 struct ipoib_dev_priv *cpriv;
 197
 198                 /* Bring up any child interfaces too */
 199                 mutex_lock(&priv->vlan_mutex);
 200                 list_for_each_entry(cpriv, &priv->child_intfs, list)
 201                         if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) == 0)
 202                                 ipoib_open(cpriv);
 203                 mutex_unlock(&priv->vlan_mutex);
 204         }
 205         dev->if_drv_flags |= IFF_DRV_RUNNING;
 206         dev->if_drv_flags &= ~IFF_DRV_OACTIVE;
 207
 208         return 0;
 209
 210 err_stop:
 211         ipoib_ib_dev_stop(priv, 1);
 212
 213 err_disable:
 214         clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 215
 216         return -EINVAL;
 217 }
 218
 219 static void
 220 ipoib_init(void *arg)
 221 {
 222         struct ifnet *dev;
 223         struct ipoib_dev_priv *priv;
 224
 225         priv = arg;
 226         dev = priv->dev;
 227         if ((dev->if_drv_flags & IFF_DRV_RUNNING) == 0)
 228                 ipoib_open(priv);
 229         queue_work(ipoib_workqueue, &priv->flush_light);
 230 }
 231
 232
 233 static int
 234 ipoib_stop(struct ipoib_dev_priv *priv)
 235 {
 236         struct ifnet *dev = priv->dev;
 237
 238         ipoib_dbg(priv, "stopping interface\n");
 239
 240         clear_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags);
 241
 242         dev->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 243
 244         ipoib_ib_dev_down(priv, 0);
 245         ipoib_ib_dev_stop(priv, 0);
 246
 247         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
 248                 struct ipoib_dev_priv *cpriv;
 249
 250                 /* Bring down any child interfaces too */
 251                 mutex_lock(&priv->vlan_mutex);
 252                 list_for_each_entry(cpriv, &priv->child_intfs, list)
 253                         if ((cpriv->dev->if_drv_flags & IFF_DRV_RUNNING) != 0)
 254                                 ipoib_stop(cpriv);
 255                 mutex_unlock(&priv->vlan_mutex);
 256         }
 257
 258         return 0;
 259 }
 260
 261 static int
 262 ipoib_propagate_ifnet_mtu(struct ipoib_dev_priv *priv, int new_mtu,
 263     bool propagate)
 264 {
 265         struct ifnet *ifp;
 266         struct ifreq ifr;
 267         int error;
 268
 269         ifp = priv->dev;
 270         if (ifp->if_mtu == new_mtu)
 271                 return (0);
 272         if (propagate) {
 273                 strlcpy(ifr.ifr_name, if_name(ifp), IFNAMSIZ);
 274                 ifr.ifr_mtu = new_mtu;
 275                 CURVNET_SET(ifp->if_vnet);
 276                 error = ifhwioctl(SIOCSIFMTU, ifp, (caddr_t)&ifr, curthread);
 277                 CURVNET_RESTORE();
 278         } else {
 279                 ifp->if_mtu = new_mtu;
 280                 error = 0;
 281         }
 282         return (error);
 283 }
 284
 285 int
 286 ipoib_change_mtu(struct ipoib_dev_priv *priv, int new_mtu, bool propagate)
 287 {
 288         int error, prev_admin_mtu;
 289
 290         /* dev->if_mtu > 2K ==> connected mode */
 291         if (ipoib_cm_admin_enabled(priv)) {
 292                 if (new_mtu > IPOIB_CM_MTU(ipoib_cm_max_mtu(priv)))
 293                         return -EINVAL;
 294
 295                 if (new_mtu > priv->mcast_mtu)
 296                         ipoib_warn(priv, "mtu > %d will cause multicast packet drops.\n",
 297                                    priv->mcast_mtu);
 298
 299                 return (ipoib_propagate_ifnet_mtu(priv, new_mtu, propagate));
 300         }
 301
 302         if (new_mtu > IPOIB_UD_MTU(priv->max_ib_mtu))
 303                 return -EINVAL;
 304
 305         prev_admin_mtu = priv->admin_mtu;
 306         priv->admin_mtu = new_mtu;
 307         error = ipoib_propagate_ifnet_mtu(priv, min(priv->mcast_mtu,
 308             priv->admin_mtu), propagate);
 309         if (error == 0) {
 310                 /* check for MTU change to avoid infinite loop */
 311                 if (prev_admin_mtu != new_mtu)
 312                         queue_work(ipoib_workqueue, &priv->flush_light);
 313         } else
 314                 priv->admin_mtu = prev_admin_mtu;
 315         return (error);
 316 }
 317
 318 static int
 319 ipoib_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 320 {
 321         struct ipoib_dev_priv *priv = ifp->if_softc;
 322         struct ifaddr *ifa = (struct ifaddr *) data;
 323         struct ifreq *ifr = (struct ifreq *) data;
 324         int error = 0;
 325
 326         /* check if detaching */
 327         if (priv == NULL || priv->gone != 0)
 328                 return (ENXIO);
 329
 330         switch (command) {
 331         case SIOCSIFFLAGS:
 332                 if (ifp->if_flags & IFF_UP) {
 333                         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
 334                                 error = -ipoib_open(priv);
 335                 } else
 336                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 337                                 ipoib_stop(priv);
 338                 break;
 339         case SIOCADDMULTI:
 340         case SIOCDELMULTI:
 341                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 342                         queue_work(ipoib_workqueue, &priv->restart_task);
 343                 break;
 344         case SIOCSIFADDR:
 345                 ifp->if_flags |= IFF_UP;
 346
 347                 switch (ifa->ifa_addr->sa_family) {
 348 #ifdef INET
 349                 case AF_INET:
 350                         ifp->if_init(ifp->if_softc);    /* before arpwhohas */
 351                         arp_ifinit(ifp, ifa);
 352                         break;
 353 #endif
 354                 default:
 355                         ifp->if_init(ifp->if_softc);
 356                         break;
 357                 }
 358                 break;
 359
 360         case SIOCGIFADDR:
 361                         bcopy(IF_LLADDR(ifp), &ifr->ifr_addr.sa_data[0],
 362                             INFINIBAND_ALEN);
 363                 break;
 364
 365         case SIOCSIFMTU:
 366                 /*
 367                  * Set the interface MTU.
 368                  */
 369                 error = -ipoib_change_mtu(priv, ifr->ifr_mtu, false);
 370                 break;
 371         default:
 372                 error = EINVAL;
 373                 break;
 374         }
 375         return (error);
 376 }
 377
 378
 379 static struct ipoib_path *
 380 __path_find(struct ipoib_dev_priv *priv, void *gid)
 381 {
 382         struct rb_node *n = priv->path_tree.rb_node;
 383         struct ipoib_path *path;
 384         int ret;
 385
 386         while (n) {
 387                 path = rb_entry(n, struct ipoib_path, rb_node);
 388
 389                 ret = memcmp(gid, path->pathrec.dgid.raw,
 390                              sizeof (union ib_gid));
 391
 392                 if (ret < 0)
 393                         n = n->rb_left;
 394                 else if (ret > 0)
 395                         n = n->rb_right;
 396                 else
 397                         return path;
 398         }
 399
 400         return NULL;
 401 }
 402
 403 static int
 404 __path_add(struct ipoib_dev_priv *priv, struct ipoib_path *path)
 405 {
 406         struct rb_node **n = &priv->path_tree.rb_node;
 407         struct rb_node *pn = NULL;
 408         struct ipoib_path *tpath;
 409         int ret;
 410
 411         while (*n) {
 412                 pn = *n;
 413                 tpath = rb_entry(pn, struct ipoib_path, rb_node);
 414
 415                 ret = memcmp(path->pathrec.dgid.raw, tpath->pathrec.dgid.raw,
 416                              sizeof (union ib_gid));
 417                 if (ret < 0)
 418                         n = &pn->rb_left;
 419                 else if (ret > 0)
 420                         n = &pn->rb_right;
 421                 else
 422                         return -EEXIST;
 423         }
 424
 425         rb_link_node(&path->rb_node, pn, n);
 426         rb_insert_color(&path->rb_node, &priv->path_tree);
 427
 428         list_add_tail(&path->list, &priv->path_list);
 429
 430         return 0;
 431 }
 432
 433 void
 434 ipoib_path_free(struct ipoib_dev_priv *priv, struct ipoib_path *path)
 435 {
 436
 437         _IF_DRAIN(&path->queue);
 438
 439         if (path->ah)
 440                 ipoib_put_ah(path->ah);
 441         if (ipoib_cm_get(path))
 442                 ipoib_cm_destroy_tx(ipoib_cm_get(path));
 443
 444         kfree(path);
 445 }
 446
 447 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
 448
 449 struct ipoib_path_iter *
 450 ipoib_path_iter_init(struct ipoib_dev_priv *priv)
 451 {
 452         struct ipoib_path_iter *iter;
 453
 454         iter = kmalloc(sizeof *iter, GFP_KERNEL);
 455         if (!iter)
 456                 return NULL;
 457
 458         iter->priv = priv;
 459         memset(iter->path.pathrec.dgid.raw, 0, 16);
 460
 461         if (ipoib_path_iter_next(iter)) {
 462                 kfree(iter);
 463                 return NULL;
 464         }
 465
 466         return iter;
 467 }
 468
 469 int
 470 ipoib_path_iter_next(struct ipoib_path_iter *iter)
 471 {
 472         struct ipoib_dev_priv *priv = iter->priv;
 473         struct rb_node *n;
 474         struct ipoib_path *path;
 475         int ret = 1;
 476
 477         spin_lock_irq(&priv->lock);
 478
 479         n = rb_first(&priv->path_tree);
 480
 481         while (n) {
 482                 path = rb_entry(n, struct ipoib_path, rb_node);
 483
 484                 if (memcmp(iter->path.pathrec.dgid.raw, path->pathrec.dgid.raw,
 485                            sizeof (union ib_gid)) < 0) {
 486                         iter->path = *path;
 487                         ret = 0;
 488                         break;
 489                 }
 490
 491                 n = rb_next(n);
 492         }
 493
 494         spin_unlock_irq(&priv->lock);
 495
 496         return ret;
 497 }
 498
 499 void
 500 ipoib_path_iter_read(struct ipoib_path_iter *iter, struct ipoib_path *path)
 501 {
 502         *path = iter->path;
 503 }
 504
 505 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
 506
 507 void
 508 ipoib_mark_paths_invalid(struct ipoib_dev_priv *priv)
 509 {
 510         struct ipoib_path *path, *tp;
 511
 512         spin_lock_irq(&priv->lock);
 513
 514         list_for_each_entry_safe(path, tp, &priv->path_list, list) {
 515                 ipoib_dbg(priv, "mark path LID 0x%04x GID %16D invalid\n",
 516                         be16_to_cpu(path->pathrec.dlid),
 517                         path->pathrec.dgid.raw, ":");
 518                 path->valid =  0;
 519         }
 520
 521         spin_unlock_irq(&priv->lock);
 522 }
 523
 524 void
 525 ipoib_flush_paths(struct ipoib_dev_priv *priv)
 526 {
 527         struct ipoib_path *path, *tp;
 528         LIST_HEAD(remove_list);
 529         unsigned long flags;
 530
 531         spin_lock_irqsave(&priv->lock, flags);
 532
 533         list_splice_init(&priv->path_list, &remove_list);
 534
 535         list_for_each_entry(path, &remove_list, list)
 536                 rb_erase(&path->rb_node, &priv->path_tree);
 537
 538         list_for_each_entry_safe(path, tp, &remove_list, list) {
 539                 if (path->query)
 540                         ib_sa_cancel_query(path->query_id, path->query);
 541                 spin_unlock_irqrestore(&priv->lock, flags);
 542                 wait_for_completion(&path->done);
 543                 ipoib_path_free(priv, path);
 544                 spin_lock_irqsave(&priv->lock, flags);
 545         }
 546
 547         spin_unlock_irqrestore(&priv->lock, flags);
 548 }
 549
 550 static void
 551 path_rec_completion(int status, struct ib_sa_path_rec *pathrec, void *path_ptr)
 552 {
 553         struct ipoib_path *path = path_ptr;
 554         struct ipoib_dev_priv *priv = path->priv;
 555         struct ifnet *dev = priv->dev;
 556         struct ipoib_ah *ah = NULL;
 557         struct ipoib_ah *old_ah = NULL;
 558         struct ifqueue mbqueue;
 559         struct mbuf *mb;
 560         unsigned long flags;
 561
 562         if (!status)
 563                 ipoib_dbg(priv, "PathRec LID 0x%04x for GID %16D\n",
 564                           be16_to_cpu(pathrec->dlid), pathrec->dgid.raw, ":");
 565         else
 566                 ipoib_dbg(priv, "PathRec status %d for GID %16D\n",
 567                           status, path->pathrec.dgid.raw, ":");
 568
 569         bzero(&mbqueue, sizeof(mbqueue));
 570
 571         if (!status) {
 572                 struct ib_ah_attr av;
 573
 574                 if (!ib_init_ah_from_path(priv->ca, priv->port, pathrec, &av))
 575                         ah = ipoib_create_ah(priv, priv->pd, &av);
 576         }
 577
 578         spin_lock_irqsave(&priv->lock, flags);
 579
 580         if (ah) {
 581                 path->pathrec = *pathrec;
 582
 583                 old_ah   = path->ah;
 584                 path->ah = ah;
 585
 586                 ipoib_dbg(priv, "created address handle %p for LID 0x%04x, SL %d\n",
 587                           ah, be16_to_cpu(pathrec->dlid), pathrec->sl);
 588
 589                 for (;;) {
 590                         _IF_DEQUEUE(&path->queue, mb);
 591                         if (mb == NULL)
 592                                 break;
 593                         _IF_ENQUEUE(&mbqueue, mb);
 594                 }
 595
 596 #ifdef CONFIG_INFINIBAND_IPOIB_CM
 597                 if (ipoib_cm_enabled(priv, path->hwaddr) && !ipoib_cm_get(path))
 598                         ipoib_cm_set(path, ipoib_cm_create_tx(priv, path));
 599 #endif
 600
 601                 path->valid = 1;
 602         }
 603
 604         path->query = NULL;
 605         complete(&path->done);
 606
 607         spin_unlock_irqrestore(&priv->lock, flags);
 608
 609         if (old_ah)
 610                 ipoib_put_ah(old_ah);
 611
 612         for (;;) {
 613                 _IF_DEQUEUE(&mbqueue, mb);
 614                 if (mb == NULL)
 615                         break;
 616                 mb->m_pkthdr.rcvif = dev;
 617                 if (dev->if_transmit(dev, mb))
 618                         ipoib_warn(priv, "dev_queue_xmit failed "
 619                                    "to requeue packet\n");
 620         }
 621 }
 622
 623 static struct ipoib_path *
 624 path_rec_create(struct ipoib_dev_priv *priv, uint8_t *hwaddr)
 625 {
 626         struct ipoib_path *path;
 627
 628         if (!priv->broadcast)
 629                 return NULL;
 630
 631         path = kzalloc(sizeof *path, GFP_ATOMIC);
 632         if (!path)
 633                 return NULL;
 634
 635         path->priv = priv;
 636
 637         bzero(&path->queue, sizeof(path->queue));
 638
 639 #ifdef CONFIG_INFINIBAND_IPOIB_CM
 640         memcpy(&path->hwaddr, hwaddr, INFINIBAND_ALEN);
 641 #endif
 642         memcpy(path->pathrec.dgid.raw, &hwaddr[4], sizeof (union ib_gid));
 643         path->pathrec.sgid          = priv->local_gid;
 644         path->pathrec.pkey          = cpu_to_be16(priv->pkey);
 645         path->pathrec.numb_path     = 1;
 646         path->pathrec.traffic_class = priv->broadcast->mcmember.traffic_class;
 647
 648         return path;
 649 }
 650
 651 static int
 652 path_rec_start(struct ipoib_dev_priv *priv, struct ipoib_path *path)
 653 {
 654         struct ifnet *dev = priv->dev;
 655
 656         ib_sa_comp_mask comp_mask = IB_SA_PATH_REC_MTU_SELECTOR | IB_SA_PATH_REC_MTU;
 657         struct ib_sa_path_rec p_rec;
 658
 659         p_rec = path->pathrec;
 660         p_rec.mtu_selector = IB_SA_GT;
 661
 662         switch (roundup_pow_of_two(dev->if_mtu + IPOIB_ENCAP_LEN)) {
 663         case 512:
 664                 p_rec.mtu = IB_MTU_256;
 665                 break;
 666         case 1024:
 667                 p_rec.mtu = IB_MTU_512;
 668                 break;
 669         case 2048:
 670                 p_rec.mtu = IB_MTU_1024;
 671                 break;
 672         case 4096:
 673                 p_rec.mtu = IB_MTU_2048;
 674                 break;
 675         default:
 676                 /* Wildcard everything */
 677                 comp_mask = 0;
 678                 p_rec.mtu = 0;
 679                 p_rec.mtu_selector = 0;
 680         }
 681
 682         ipoib_dbg(priv, "Start path record lookup for %16D MTU > %d\n",
 683                   p_rec.dgid.raw, ":",
 684                   comp_mask ? ib_mtu_enum_to_int(p_rec.mtu) : 0);
 685
 686         init_completion(&path->done);
 687
 688         path->query_id =
 689                 ib_sa_path_rec_get(&ipoib_sa_client, priv->ca, priv->port,
 690                                    &p_rec, comp_mask            |
 691                                    IB_SA_PATH_REC_DGID          |
 692                                    IB_SA_PATH_REC_SGID          |
 693                                    IB_SA_PATH_REC_NUMB_PATH     |
 694                                    IB_SA_PATH_REC_TRAFFIC_CLASS |
 695                                    IB_SA_PATH_REC_PKEY,
 696                                    1000, GFP_ATOMIC,
 697                                    path_rec_completion,
 698                                    path, &path->query);
 699         if (path->query_id < 0) {
 700                 ipoib_warn(priv, "ib_sa_path_rec_get failed: %d\n", path->query_id);
 701                 path->query = NULL;
 702                 complete(&path->done);
 703                 return path->query_id;
 704         }
 705
 706         return 0;
 707 }
 708
 709 static void
 710 ipoib_unicast_send(struct mbuf *mb, struct ipoib_dev_priv *priv, struct ipoib_header *eh)
 711 {
 712         struct ipoib_path *path;
 713
 714         path = __path_find(priv, eh->hwaddr + 4);
 715         if (!path || !path->valid) {
 716                 int new_path = 0;
 717
 718                 if (!path) {
 719                         path = path_rec_create(priv, eh->hwaddr);
 720                         new_path = 1;
 721                 }
 722                 if (path) {
 723                         if (_IF_QLEN(&path->queue) < IPOIB_MAX_PATH_REC_QUEUE)
 724                                 _IF_ENQUEUE(&path->queue, mb);
 725                         else {
 726                                 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1);
 727                                 m_freem(mb);
 728                         }
 729
 730                         if (!path->query && path_rec_start(priv, path)) {
 731                                 spin_unlock_irqrestore(&priv->lock, flags);
 732                                 if (new_path)
 733                                         ipoib_path_free(priv, path);
 734                                 return;
 735                         } else
 736                                 __path_add(priv, path);
 737                 } else {
 738                         if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1);
 739                         m_freem(mb);
 740                 }
 741
 742                 return;
 743         }
 744
 745         if (ipoib_cm_get(path) && ipoib_cm_up(path)) {
 746                 ipoib_cm_send(priv, mb, ipoib_cm_get(path));
 747         } else if (path->ah) {
 748                 ipoib_send(priv, mb, path->ah, IPOIB_QPN(eh->hwaddr));
 749         } else if ((path->query || !path_rec_start(priv, path)) &&
 750                     path->queue.ifq_len < IPOIB_MAX_PATH_REC_QUEUE) {
 751                 _IF_ENQUEUE(&path->queue, mb);
 752         } else {
 753                 if_inc_counter(priv->dev, IFCOUNTER_OERRORS, 1);
 754                 m_freem(mb);
 755         }
 756 }
 757
 758 static int
 759 ipoib_send_one(struct ipoib_dev_priv *priv, struct mbuf *mb)
 760 {
 761         struct ipoib_header *eh;
 762
 763         eh = mtod(mb, struct ipoib_header *);
 764         if (IPOIB_IS_MULTICAST(eh->hwaddr)) {
 765                 /* Add in the P_Key for multicast*/
 766                 eh->hwaddr[8] = (priv->pkey >> 8) & 0xff;
 767                 eh->hwaddr[9] = priv->pkey & 0xff;
 768
 769                 ipoib_mcast_send(priv, eh->hwaddr + 4, mb);
 770         } else
 771                 ipoib_unicast_send(mb, priv, eh);
 772
 773         return 0;
 774 }
 775
 776
 777 static void
 778 _ipoib_start(struct ifnet *dev, struct ipoib_dev_priv *priv)
 779 {
 780         struct mbuf *mb;
 781
 782         if ((dev->if_drv_flags & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) !=
 783             IFF_DRV_RUNNING)
 784                 return;
 785
 786         spin_lock(&priv->lock);
 787         while (!IFQ_DRV_IS_EMPTY(&dev->if_snd) &&
 788             (dev->if_drv_flags & IFF_DRV_OACTIVE) == 0) {
 789                 IFQ_DRV_DEQUEUE(&dev->if_snd, mb);
 790                 if (mb == NULL)
 791                         break;
 792                 IPOIB_MTAP(dev, mb);
 793                 ipoib_send_one(priv, mb);
 794         }
 795         spin_unlock(&priv->lock);
 796 }
 797
 798 static void
 799 ipoib_start(struct ifnet *dev)
 800 {
 801         _ipoib_start(dev, dev->if_softc);
 802 }
 803
 804 static void
 805 ipoib_vlan_start(struct ifnet *dev)
 806 {
 807         struct ipoib_dev_priv *priv;
 808         struct mbuf *mb;
 809
 810         priv = VLAN_COOKIE(dev);
 811         if (priv != NULL)
 812                 return _ipoib_start(dev, priv);
 813         while (!IFQ_DRV_IS_EMPTY(&dev->if_snd)) {
 814                 IFQ_DRV_DEQUEUE(&dev->if_snd, mb);
 815                 if (mb == NULL)
 816                         break;
 817                 m_freem(mb);
 818                 if_inc_counter(dev, IFCOUNTER_OERRORS, 1);
 819         }
 820 }
 821
 822 int
 823 ipoib_dev_init(struct ipoib_dev_priv *priv, struct ib_device *ca, int port)
 824 {
 825
 826         /* Allocate RX/TX "rings" to hold queued mbs */
 827         priv->rx_ring = kzalloc(ipoib_recvq_size * sizeof *priv->rx_ring,
 828                                 GFP_KERNEL);
 829         if (!priv->rx_ring) {
 830                 printk(KERN_WARNING "%s: failed to allocate RX ring (%d entries)\n",
 831                        ca->name, ipoib_recvq_size);
 832                 goto out;
 833         }
 834
 835         priv->tx_ring = kzalloc(ipoib_sendq_size * sizeof *priv->tx_ring, GFP_KERNEL);
 836         if (!priv->tx_ring) {
 837                 printk(KERN_WARNING "%s: failed to allocate TX ring (%d entries)\n",
 838                        ca->name, ipoib_sendq_size);
 839                 goto out_rx_ring_cleanup;
 840         }
 841         memset(priv->tx_ring, 0, ipoib_sendq_size * sizeof *priv->tx_ring);
 842
 843         /* priv->tx_head, tx_tail & tx_outstanding are already 0 */
 844
 845         if (ipoib_ib_dev_init(priv, ca, port))
 846                 goto out_tx_ring_cleanup;
 847
 848         return 0;
 849
 850 out_tx_ring_cleanup:
 851         kfree(priv->tx_ring);
 852
 853 out_rx_ring_cleanup:
 854         kfree(priv->rx_ring);
 855
 856 out:
 857         return -ENOMEM;
 858 }
 859
 860 static void
 861 ipoib_detach(struct ipoib_dev_priv *priv)
 862 {
 863         struct ifnet *dev;
 864
 865         dev = priv->dev;
 866         if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) {
 867                 priv->gone = 1;
 868                 bpfdetach(dev);
 869                 if_detach(dev);
 870                 if_free(dev);
 871                 free_unr(ipoib_unrhdr, priv->unit);
 872         } else
 873                 VLAN_SETCOOKIE(priv->dev, NULL);
 874
 875         free(priv, M_TEMP);
 876 }
 877
 878 void
 879 ipoib_dev_cleanup(struct ipoib_dev_priv *priv)
 880 {
 881         struct ipoib_dev_priv *cpriv, *tcpriv;
 882
 883         /* Delete any child interfaces first */
 884         list_for_each_entry_safe(cpriv, tcpriv, &priv->child_intfs, list) {
 885                 ipoib_dev_cleanup(cpriv);
 886                 ipoib_detach(cpriv);
 887         }
 888
 889         ipoib_ib_dev_cleanup(priv);
 890
 891         kfree(priv->rx_ring);
 892         kfree(priv->tx_ring);
 893
 894         priv->rx_ring = NULL;
 895         priv->tx_ring = NULL;
 896 }
 897
 898 static struct ipoib_dev_priv *
 899 ipoib_priv_alloc(void)
 900 {
 901         struct ipoib_dev_priv *priv;
 902
 903         priv = malloc(sizeof(struct ipoib_dev_priv), M_TEMP, M_ZERO|M_WAITOK);
 904         spin_lock_init(&priv->lock);
 905         spin_lock_init(&priv->drain_lock);
 906         mutex_init(&priv->vlan_mutex);
 907         INIT_LIST_HEAD(&priv->path_list);
 908         INIT_LIST_HEAD(&priv->child_intfs);
 909         INIT_LIST_HEAD(&priv->dead_ahs);
 910         INIT_LIST_HEAD(&priv->multicast_list);
 911         INIT_DELAYED_WORK(&priv->pkey_poll_task, ipoib_pkey_poll);
 912         INIT_DELAYED_WORK(&priv->mcast_task,   ipoib_mcast_join_task);
 913         INIT_WORK(&priv->carrier_on_task, ipoib_mcast_carrier_on_task);
 914         INIT_WORK(&priv->flush_light,   ipoib_ib_dev_flush_light);
 915         INIT_WORK(&priv->flush_normal,   ipoib_ib_dev_flush_normal);
 916         INIT_WORK(&priv->flush_heavy,   ipoib_ib_dev_flush_heavy);
 917         INIT_WORK(&priv->restart_task, ipoib_mcast_restart_task);
 918         INIT_DELAYED_WORK(&priv->ah_reap_task, ipoib_reap_ah);
 919         memcpy(priv->broadcastaddr, ipv4_bcast_addr, INFINIBAND_ALEN);
 920
 921         return (priv);
 922 }
 923
 924 struct ipoib_dev_priv *
 925 ipoib_intf_alloc(const char *name)
 926 {
 927         struct ipoib_dev_priv *priv;
 928         struct sockaddr_dl *sdl;
 929         struct ifnet *dev;
 930
 931         priv = ipoib_priv_alloc();
 932         dev = priv->dev = if_alloc(IFT_INFINIBAND);
 933         if (!dev) {
 934                 free(priv, M_TEMP);
 935                 return NULL;
 936         }
 937         dev->if_softc = priv;
 938         priv->unit = alloc_unr(ipoib_unrhdr);
 939         if (priv->unit == -1) {
 940                 if_free(dev);
 941                 free(priv, M_TEMP);
 942                 return NULL;
 943         }
 944         if_initname(dev, name, priv->unit);
 945         dev->if_flags = IFF_BROADCAST | IFF_MULTICAST;
 946         dev->if_addrlen = INFINIBAND_ALEN;
 947         dev->if_hdrlen = IPOIB_HEADER_LEN;
 948         if_attach(dev);
 949         dev->if_init = ipoib_init;
 950         dev->if_ioctl = ipoib_ioctl;
 951         dev->if_start = ipoib_start;
 952         dev->if_output = ipoib_output;
 953         dev->if_input = ipoib_input;
 954         dev->if_resolvemulti = ipoib_resolvemulti;
 955         dev->if_baudrate = IF_Gbps(10);
 956         dev->if_broadcastaddr = priv->broadcastaddr;
 957         dev->if_snd.ifq_maxlen = ipoib_sendq_size * 2;
 958         sdl = (struct sockaddr_dl *)dev->if_addr->ifa_addr;
 959         sdl->sdl_type = IFT_INFINIBAND;
 960         sdl->sdl_alen = dev->if_addrlen;
 961         priv->dev = dev;
 962         if_link_state_change(dev, LINK_STATE_DOWN);
 963         bpfattach(dev, DLT_EN10MB, ETHER_HDR_LEN);
 964
 965         return dev->if_softc;
 966 }
 967
 968 int
 969 ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca)
 970 {
 971         struct ib_device_attr *device_attr = &hca->attrs;
 972
 973         priv->hca_caps = device_attr->device_cap_flags;
 974
 975         priv->dev->if_hwassist = 0;
 976         priv->dev->if_capabilities = 0;
 977
 978 #ifndef CONFIG_INFINIBAND_IPOIB_CM
 979         if (priv->hca_caps & IB_DEVICE_UD_IP_CSUM) {
 980                 set_bit(IPOIB_FLAG_CSUM, &priv->flags);
 981                 priv->dev->if_hwassist = CSUM_IP | CSUM_TCP | CSUM_UDP;
 982                 priv->dev->if_capabilities = IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM;
 983         }
 984
 985 #if 0
 986         if (priv->dev->features & NETIF_F_SG && priv->hca_caps & IB_DEVICE_UD_TSO) {
 987                 priv->dev->if_capabilities |= IFCAP_TSO4;
 988                 priv->dev->if_hwassist |= CSUM_TSO;
 989         }
 990 #endif
 991 #endif
 992         priv->dev->if_capabilities |=
 993             IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_LINKSTATE;
 994         priv->dev->if_capenable = priv->dev->if_capabilities;
 995
 996         return 0;
 997 }
 998
 999
1000 static struct ifnet *
1001 ipoib_add_port(const char *format, struct ib_device *hca, u8 port)
1002 {
1003         struct ipoib_dev_priv *priv;
1004         struct ib_port_attr attr;
1005         int result = -ENOMEM;
1006
1007         priv = ipoib_intf_alloc(format);
1008         if (!priv)
1009                 goto alloc_mem_failed;
1010
1011         if (!ib_query_port(hca, port, &attr))
1012                 priv->max_ib_mtu = ib_mtu_enum_to_int(attr.max_mtu);
1013         else {
1014                 printk(KERN_WARNING "%s: ib_query_port %d failed\n",
1015                        hca->name, port);
1016                 goto device_init_failed;
1017         }
1018
1019         /* MTU will be reset when mcast join happens */
1020         priv->dev->if_mtu = IPOIB_UD_MTU(priv->max_ib_mtu);
1021         priv->mcast_mtu = priv->admin_mtu = priv->dev->if_mtu;
1022
1023         result = ib_query_pkey(hca, port, 0, &priv->pkey);
1024         if (result) {
1025                 printk(KERN_WARNING "%s: ib_query_pkey port %d failed (ret = %d)\n",
1026                        hca->name, port, result);
1027                 goto device_init_failed;
1028         }
1029
1030         if (ipoib_set_dev_features(priv, hca))
1031                 goto device_init_failed;
1032
1033         /*
1034          * Set the full membership bit, so that we join the right
1035          * broadcast group, etc.
1036          */
1037         priv->pkey |= 0x8000;
1038
1039         priv->broadcastaddr[8] = priv->pkey >> 8;
1040         priv->broadcastaddr[9] = priv->pkey & 0xff;
1041
1042         result = ib_query_gid(hca, port, 0, &priv->local_gid, NULL);
1043         if (result) {
1044                 printk(KERN_WARNING "%s: ib_query_gid port %d failed (ret = %d)\n",
1045                        hca->name, port, result);
1046                 goto device_init_failed;
1047         }
1048         memcpy(IF_LLADDR(priv->dev) + 4, priv->local_gid.raw, sizeof (union ib_gid));
1049
1050         result = ipoib_dev_init(priv, hca, port);
1051         if (result < 0) {
1052                 printk(KERN_WARNING "%s: failed to initialize port %d (ret = %d)\n",
1053                        hca->name, port, result);
1054                 goto device_init_failed;
1055         }
1056         if (ipoib_cm_admin_enabled(priv))
1057                 priv->dev->if_mtu = IPOIB_CM_MTU(ipoib_cm_max_mtu(priv));
1058
1059         INIT_IB_EVENT_HANDLER(&priv->event_handler,
1060                               priv->ca, ipoib_event);
1061         result = ib_register_event_handler(&priv->event_handler);
1062         if (result < 0) {
1063                 printk(KERN_WARNING "%s: ib_register_event_handler failed for "
1064                        "port %d (ret = %d)\n",
1065                        hca->name, port, result);
1066                 goto event_failed;
1067         }
1068         if_printf(priv->dev, "Attached to %s port %d\n", hca->name, port);
1069
1070         return priv->dev;
1071
1072 event_failed:
1073         ipoib_dev_cleanup(priv);
1074
1075 device_init_failed:
1076         ipoib_detach(priv);
1077
1078 alloc_mem_failed:
1079         return ERR_PTR(result);
1080 }
1081
1082 static void
1083 ipoib_add_one(struct ib_device *device)
1084 {
1085         struct list_head *dev_list;
1086         struct ifnet *dev;
1087         struct ipoib_dev_priv *priv;
1088         int s, e, p;
1089
1090         if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1091                 return;
1092
1093         dev_list = kmalloc(sizeof *dev_list, GFP_KERNEL);
1094         if (!dev_list)
1095                 return;
1096
1097         INIT_LIST_HEAD(dev_list);
1098
1099         if (device->node_type == RDMA_NODE_IB_SWITCH) {
1100                 s = 0;
1101                 e = 0;
1102         } else {
1103                 s = 1;
1104                 e = device->phys_port_cnt;
1105         }
1106
1107         for (p = s; p <= e; ++p) {
1108                 if (rdma_port_get_link_layer(device, p) != IB_LINK_LAYER_INFINIBAND)
1109                         continue;
1110                 dev = ipoib_add_port("ib", device, p);
1111                 if (!IS_ERR(dev)) {
1112                         priv = dev->if_softc;
1113                         list_add_tail(&priv->list, dev_list);
1114                 }
1115         }
1116
1117         ib_set_client_data(device, &ipoib_client, dev_list);
1118 }
1119
1120 static void
1121 ipoib_remove_one(struct ib_device *device, void *client_data)
1122 {
1123         struct ipoib_dev_priv *priv, *tmp;
1124         struct list_head *dev_list = client_data;
1125
1126         if (!dev_list)
1127                 return;
1128
1129         if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB)
1130                 return;
1131
1132         list_for_each_entry_safe(priv, tmp, dev_list, list) {
1133                 if (rdma_port_get_link_layer(device, priv->port) != IB_LINK_LAYER_INFINIBAND)
1134                         continue;
1135
1136                 ipoib_stop(priv);
1137
1138                 ib_unregister_event_handler(&priv->event_handler);
1139
1140                 /* dev_change_flags(priv->dev, priv->dev->flags & ~IFF_UP); */
1141
1142                 flush_workqueue(ipoib_workqueue);
1143
1144                 ipoib_dev_cleanup(priv);
1145                 ipoib_detach(priv);
1146         }
1147
1148         kfree(dev_list);
1149 }
1150
1151 static int
1152 ipoib_match_dev_addr(const struct sockaddr *addr, struct net_device *dev)
1153 {
1154         struct epoch_tracker et;
1155         struct ifaddr *ifa;
1156         int retval = 0;
1157
1158         CURVNET_SET(dev->if_vnet);
1159         NET_EPOCH_ENTER(et);
1160         CK_STAILQ_FOREACH(ifa, &dev->if_addrhead, ifa_link) {
1161                 if (ifa->ifa_addr == NULL ||
1162                     ifa->ifa_addr->sa_family != addr->sa_family ||
1163                     ifa->ifa_addr->sa_len != addr->sa_len) {
1164                         continue;
1165                 }
1166                 if (memcmp(ifa->ifa_addr, addr, addr->sa_len) == 0) {
1167                         retval = 1;
1168                         break;
1169                 }
1170         }
1171         NET_EPOCH_EXIT(et);
1172         CURVNET_RESTORE();
1173
1174         return (retval);
1175 }
1176
1177 /*
1178  * ipoib_match_gid_pkey_addr - returns the number of IPoIB netdevs on
1179  * top a given ipoib device matching a pkey_index and address, if one
1180  * exists.
1181  *
1182  * @found_net_dev: contains a matching net_device if the return value
1183  * >= 1, with a reference held.
1184  */
1185 static int
1186 ipoib_match_gid_pkey_addr(struct ipoib_dev_priv *priv,
1187     const union ib_gid *gid, u16 pkey_index, const struct sockaddr *addr,
1188     struct net_device **found_net_dev)
1189 {
1190         struct ipoib_dev_priv *child_priv;
1191         int matches = 0;
1192
1193         if (priv->pkey_index == pkey_index &&
1194             (!gid || !memcmp(gid, &priv->local_gid, sizeof(*gid)))) {
1195                 if (addr == NULL || ipoib_match_dev_addr(addr, priv->dev) != 0) {
1196                         if (*found_net_dev == NULL) {
1197                                 struct net_device *net_dev;
1198
1199                                 if (priv->parent != NULL)
1200                                         net_dev = priv->parent;
1201                                 else
1202                                         net_dev = priv->dev;
1203                                 *found_net_dev = net_dev;
1204                                 dev_hold(net_dev);
1205                         }
1206                         matches++;
1207                 }
1208         }
1209
1210         /* Check child interfaces */
1211         mutex_lock(&priv->vlan_mutex);
1212         list_for_each_entry(child_priv, &priv->child_intfs, list) {
1213                 matches += ipoib_match_gid_pkey_addr(child_priv, gid,
1214                     pkey_index, addr, found_net_dev);
1215                 if (matches > 1)
1216                         break;
1217         }
1218         mutex_unlock(&priv->vlan_mutex);
1219
1220         return matches;
1221 }
1222
1223 /*
1224  * __ipoib_get_net_dev_by_params - returns the number of matching
1225  * net_devs found (between 0 and 2). Also return the matching
1226  * net_device in the @net_dev parameter, holding a reference to the
1227  * net_device, if the number of matches >= 1
1228  */
1229 static int
1230 __ipoib_get_net_dev_by_params(struct list_head *dev_list, u8 port,
1231     u16 pkey_index, const union ib_gid *gid,
1232     const struct sockaddr *addr, struct net_device **net_dev)
1233 {
1234         struct ipoib_dev_priv *priv;
1235         int matches = 0;
1236
1237         *net_dev = NULL;
1238
1239         list_for_each_entry(priv, dev_list, list) {
1240                 if (priv->port != port)
1241                         continue;
1242
1243                 matches += ipoib_match_gid_pkey_addr(priv, gid, pkey_index,
1244                     addr, net_dev);
1245
1246                 if (matches > 1)
1247                         break;
1248         }
1249
1250         return matches;
1251 }
1252
1253 static struct net_device *
1254 ipoib_get_net_dev_by_params(struct ib_device *dev, u8 port, u16 pkey,
1255     const union ib_gid *gid, const struct sockaddr *addr, void *client_data)
1256 {
1257         struct net_device *net_dev;
1258         struct list_head *dev_list = client_data;
1259         u16 pkey_index;
1260         int matches;
1261         int ret;
1262
1263         if (!rdma_protocol_ib(dev, port))
1264                 return NULL;
1265
1266         ret = ib_find_cached_pkey(dev, port, pkey, &pkey_index);
1267         if (ret)
1268                 return NULL;
1269
1270         if (!dev_list)
1271                 return NULL;
1272
1273         /* See if we can find a unique device matching the L2 parameters */
1274         matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
1275                                                 gid, NULL, &net_dev);
1276
1277         switch (matches) {
1278         case 0:
1279                 return NULL;
1280         case 1:
1281                 return net_dev;
1282         }
1283
1284         dev_put(net_dev);
1285
1286         /* Couldn't find a unique device with L2 parameters only. Use L3
1287          * address to uniquely match the net device */
1288         matches = __ipoib_get_net_dev_by_params(dev_list, port, pkey_index,
1289                                                 gid, addr, &net_dev);
1290         switch (matches) {
1291         case 0:
1292                 return NULL;
1293         default:
1294                 dev_warn_ratelimited(&dev->dev,
1295                                      "duplicate IP address detected\n");
1296                 /* Fall through */
1297         case 1:
1298                 return net_dev;
1299         }
1300 }
1301
1302 static void
1303 ipoib_config_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
1304 {
1305         struct ipoib_dev_priv *parent;
1306         struct ipoib_dev_priv *priv;
1307         struct ifnet *dev;
1308         uint16_t pkey;
1309         int error;
1310
1311         if (ifp->if_type != IFT_INFINIBAND)
1312                 return;
1313         dev = VLAN_DEVAT(ifp, vtag);
1314         if (dev == NULL)
1315                 return;
1316         priv = NULL;
1317         error = 0;
1318         parent = ifp->if_softc;
1319         /* We only support 15 bits of pkey. */
1320         if (vtag & 0x8000)
1321                 return;
1322         pkey = vtag | 0x8000;   /* Set full membership bit. */
1323         if (pkey == parent->pkey)
1324                 return;
1325         /* Check for dups */
1326         mutex_lock(&parent->vlan_mutex);
1327         list_for_each_entry(priv, &parent->child_intfs, list) {
1328                 if (priv->pkey == pkey) {
1329                         priv = NULL;
1330                         error = EBUSY;
1331                         goto out;
1332                 }
1333         }
1334         priv = ipoib_priv_alloc();
1335         priv->dev = dev;
1336         priv->max_ib_mtu = parent->max_ib_mtu;
1337         priv->mcast_mtu = priv->admin_mtu = parent->dev->if_mtu;
1338         set_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags);
1339         error = ipoib_set_dev_features(priv, parent->ca);
1340         if (error)
1341                 goto out;
1342         priv->pkey = pkey;
1343         priv->broadcastaddr[8] = pkey >> 8;
1344         priv->broadcastaddr[9] = pkey & 0xff;
1345         dev->if_broadcastaddr = priv->broadcastaddr;
1346         error = ipoib_dev_init(priv, parent->ca, parent->port);
1347         if (error)
1348                 goto out;
1349         priv->parent = parent->dev;
1350         list_add_tail(&priv->list, &parent->child_intfs);
1351         VLAN_SETCOOKIE(dev, priv);
1352         dev->if_start = ipoib_vlan_start;
1353         dev->if_drv_flags &= ~IFF_DRV_RUNNING;
1354         dev->if_hdrlen = IPOIB_HEADER_LEN;
1355         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1356                 ipoib_open(priv);
1357         mutex_unlock(&parent->vlan_mutex);
1358         return;
1359 out:
1360         mutex_unlock(&parent->vlan_mutex);
1361         if (priv)
1362                 free(priv, M_TEMP);
1363         if (error)
1364                 ipoib_warn(parent,
1365                     "failed to initialize subinterface: device %s, port %d vtag 0x%X",
1366                     parent->ca->name, parent->port, vtag);
1367         return;
1368 }
1369
1370 static void
1371 ipoib_unconfig_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
1372 {
1373         struct ipoib_dev_priv *parent;
1374         struct ipoib_dev_priv *priv;
1375         struct ifnet *dev;
1376         uint16_t pkey;
1377
1378         if (ifp->if_type != IFT_INFINIBAND)
1379                 return;
1380
1381         dev = VLAN_DEVAT(ifp, vtag);
1382         if (dev)
1383                 VLAN_SETCOOKIE(dev, NULL);
1384         pkey = vtag | 0x8000;
1385         parent = ifp->if_softc;
1386         mutex_lock(&parent->vlan_mutex);
1387         list_for_each_entry(priv, &parent->child_intfs, list) {
1388                 if (priv->pkey == pkey) {
1389                         ipoib_dev_cleanup(priv);
1390                         list_del(&priv->list);
1391                         break;
1392                 }
1393         }
1394         mutex_unlock(&parent->vlan_mutex);
1395 }
1396
1397 eventhandler_tag ipoib_vlan_attach;
1398 eventhandler_tag ipoib_vlan_detach;
1399
1400 static int __init
1401 ipoib_init_module(void)
1402 {
1403         int ret;
1404
1405         ipoib_recvq_size = roundup_pow_of_two(ipoib_recvq_size);
1406         ipoib_recvq_size = min(ipoib_recvq_size, IPOIB_MAX_QUEUE_SIZE);
1407         ipoib_recvq_size = max(ipoib_recvq_size, IPOIB_MIN_QUEUE_SIZE);
1408
1409         ipoib_sendq_size = roundup_pow_of_two(ipoib_sendq_size);
1410         ipoib_sendq_size = min(ipoib_sendq_size, IPOIB_MAX_QUEUE_SIZE);
1411         ipoib_sendq_size = max(ipoib_sendq_size, max(2 * MAX_SEND_CQE,
1412                                                      IPOIB_MIN_QUEUE_SIZE));
1413 #ifdef CONFIG_INFINIBAND_IPOIB_CM
1414         ipoib_max_conn_qp = min(ipoib_max_conn_qp, IPOIB_CM_MAX_CONN_QP);
1415 #endif
1416
1417         ipoib_vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
1418                 ipoib_config_vlan, NULL, EVENTHANDLER_PRI_FIRST);
1419         ipoib_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
1420                 ipoib_unconfig_vlan, NULL, EVENTHANDLER_PRI_FIRST);
1421
1422         /*
1423          * We create our own workqueue mainly because we want to be
1424          * able to flush it when devices are being removed.  We can't
1425          * use schedule_work()/flush_scheduled_work() because both
1426          * unregister_netdev() and linkwatch_event take the rtnl lock,
1427          * so flush_scheduled_work() can deadlock during device
1428          * removal.
1429          */
1430         ipoib_workqueue = create_singlethread_workqueue("ipoib");
1431         if (!ipoib_workqueue) {
1432                 ret = -ENOMEM;
1433                 goto err_fs;
1434         }
1435
1436         ib_sa_register_client(&ipoib_sa_client);
1437
1438         ret = ib_register_client(&ipoib_client);
1439         if (ret)
1440                 goto err_sa;
1441
1442         return 0;
1443
1444 err_sa:
1445         ib_sa_unregister_client(&ipoib_sa_client);
1446         destroy_workqueue(ipoib_workqueue);
1447
1448 err_fs:
1449         return ret;
1450 }
1451
1452 static void __exit
1453 ipoib_cleanup_module(void)
1454 {
1455
1456         EVENTHANDLER_DEREGISTER(vlan_config, ipoib_vlan_attach);
1457         EVENTHANDLER_DEREGISTER(vlan_unconfig, ipoib_vlan_detach);
1458         ib_unregister_client(&ipoib_client);
1459         ib_sa_unregister_client(&ipoib_sa_client);
1460         destroy_workqueue(ipoib_workqueue);
1461 }
1462
1463 /*
1464  * Infiniband output routine.
1465  */
1466 static int
1467 ipoib_output(struct ifnet *ifp, struct mbuf *m,
1468         const struct sockaddr *dst, struct route *ro)
1469 {
1470         u_char edst[INFINIBAND_ALEN];
1471 #if defined(INET) || defined(INET6)
1472         struct llentry *lle = NULL;
1473 #endif
1474         struct ipoib_header *eh;
1475         int error = 0, is_gw = 0;
1476         short type;
1477
1478         if (ro != NULL)
1479                 is_gw = (ro->ro_flags & RT_HAS_GW) != 0;
1480 #ifdef MAC
1481         error = mac_ifnet_check_transmit(ifp, m);
1482         if (error)
1483                 goto bad;
1484 #endif
1485
1486         M_PROFILE(m);
1487         if (ifp->if_flags & IFF_MONITOR) {
1488                 error = ENETDOWN;
1489                 goto bad;
1490         }
1491         if (!((ifp->if_flags & IFF_UP) &&
1492             (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
1493                 error = ENETDOWN;
1494                 goto bad;
1495         }
1496
1497         switch (dst->sa_family) {
1498 #ifdef INET
1499         case AF_INET:
1500                 if (lle != NULL && (lle->la_flags & LLE_VALID))
1501                         memcpy(edst, lle->ll_addr, sizeof(edst));
1502                 else if (m->m_flags & M_MCAST)
1503                         ip_ib_mc_map(((struct sockaddr_in *)dst)->sin_addr.s_addr, ifp->if_broadcastaddr, edst);
1504                 else
1505                         error = arpresolve(ifp, is_gw, m, dst, edst, NULL, NULL);
1506                 if (error)
1507                         return (error == EWOULDBLOCK ? 0 : error);
1508                 type = htons(ETHERTYPE_IP);
1509                 break;
1510         case AF_ARP:
1511         {
1512                 struct arphdr *ah;
1513                 ah = mtod(m, struct arphdr *);
1514                 ah->ar_hrd = htons(ARPHRD_INFINIBAND);
1515
1516                 switch(ntohs(ah->ar_op)) {
1517                 case ARPOP_REVREQUEST:
1518                 case ARPOP_REVREPLY:
1519                         type = htons(ETHERTYPE_REVARP);
1520                         break;
1521                 case ARPOP_REQUEST:
1522                 case ARPOP_REPLY:
1523                 default:
1524                         type = htons(ETHERTYPE_ARP);
1525                         break;
1526                 }
1527
1528                 if (m->m_flags & M_BCAST)
1529                         bcopy(ifp->if_broadcastaddr, edst, INFINIBAND_ALEN);
1530                 else
1531                         bcopy(ar_tha(ah), edst, INFINIBAND_ALEN);
1532
1533         }
1534         break;
1535 #endif
1536 #ifdef INET6
1537         case AF_INET6:
1538                 if (lle != NULL && (lle->la_flags & LLE_VALID))
1539                         memcpy(edst, lle->ll_addr, sizeof(edst));
1540                 else if (m->m_flags & M_MCAST)
1541                         ipv6_ib_mc_map(&((struct sockaddr_in6 *)dst)->sin6_addr, ifp->if_broadcastaddr, edst);
1542                 else
1543                         error = nd6_resolve(ifp, is_gw, m, dst, edst, NULL, NULL);
1544                 if (error)
1545                         return error;
1546                 type = htons(ETHERTYPE_IPV6);
1547                 break;
1548 #endif
1549
1550         default:
1551                 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
1552                 error = EAFNOSUPPORT;
1553                 goto bad;
1554         }
1555
1556         /*
1557          * Add local net header.  If no space in first mbuf,
1558          * allocate another.
1559          */
1560         M_PREPEND(m, IPOIB_HEADER_LEN, M_NOWAIT);
1561         if (m == NULL) {
1562                 error = ENOBUFS;
1563                 goto bad;
1564         }
1565         eh = mtod(m, struct ipoib_header *);
1566         (void)memcpy(&eh->proto, &type, sizeof(eh->proto));
1567         (void)memcpy(&eh->hwaddr, edst, sizeof (edst));
1568
1569         /*
1570          * Queue message on interface, update output statistics if
1571          * successful, and start output if interface not yet active.
1572          */
1573         return ((ifp->if_transmit)(ifp, m));
1574 bad:
1575         if (m != NULL)
1576                 m_freem(m);
1577         return (error);
1578 }
1579
1580 /*
1581  * Upper layer processing for a received Infiniband packet.
1582  */
1583 void
1584 ipoib_demux(struct ifnet *ifp, struct mbuf *m, u_short proto)
1585 {
1586         int isr;
1587
1588 #ifdef MAC
1589         /*
1590          * Tag the mbuf with an appropriate MAC label before any other
1591          * consumers can get to it.
1592          */
1593         mac_ifnet_create_mbuf(ifp, m);
1594 #endif
1595         /* Allow monitor mode to claim this frame, after stats are updated. */
1596         if (ifp->if_flags & IFF_MONITOR) {
1597                 if_printf(ifp, "discard frame at IFF_MONITOR\n");
1598                 m_freem(m);
1599                 return;
1600         }
1601         /*
1602          * Dispatch frame to upper layer.
1603          */
1604         switch (proto) {
1605 #ifdef INET
1606         case ETHERTYPE_IP:
1607                 isr = NETISR_IP;
1608                 break;
1609
1610         case ETHERTYPE_ARP:
1611                 if (ifp->if_flags & IFF_NOARP) {
1612                         /* Discard packet if ARP is disabled on interface */
1613                         m_freem(m);
1614                         return;
1615                 }
1616                 isr = NETISR_ARP;
1617                 break;
1618 #endif
1619 #ifdef INET6
1620         case ETHERTYPE_IPV6:
1621                 isr = NETISR_IPV6;
1622                 break;
1623 #endif
1624         default:
1625                 goto discard;
1626         }
1627         netisr_dispatch(isr, m);
1628         return;
1629
1630 discard:
1631         m_freem(m);
1632 }
1633
1634 /*
1635  * Process a received Infiniband packet.
1636  */
1637 static void
1638 ipoib_input(struct ifnet *ifp, struct mbuf *m)
1639 {
1640         struct ipoib_header *eh;
1641
1642         if ((ifp->if_flags & IFF_UP) == 0) {
1643                 m_freem(m);
1644                 return;
1645         }
1646         CURVNET_SET_QUIET(ifp->if_vnet);
1647
1648         /* Let BPF have it before we strip the header. */
1649         IPOIB_MTAP(ifp, m);
1650         eh = mtod(m, struct ipoib_header *);
1651         /*
1652          * Reset layer specific mbuf flags to avoid confusing upper layers.
1653          * Strip off Infiniband header.
1654          */
1655         m->m_flags &= ~M_VLANTAG;
1656         m_clrprotoflags(m);
1657         m_adj(m, IPOIB_HEADER_LEN);
1658
1659         if (IPOIB_IS_MULTICAST(eh->hwaddr)) {
1660                 if (memcmp(eh->hwaddr, ifp->if_broadcastaddr,
1661                     ifp->if_addrlen) == 0)
1662                         m->m_flags |= M_BCAST;
1663                 else
1664                         m->m_flags |= M_MCAST;
1665                 if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
1666         }
1667
1668         ipoib_demux(ifp, m, ntohs(eh->proto));
1669         CURVNET_RESTORE();
1670 }
1671
1672 static int
1673 ipoib_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
1674         struct sockaddr *sa)
1675 {
1676         struct sockaddr_dl *sdl;
1677 #ifdef INET
1678         struct sockaddr_in *sin;
1679 #endif
1680 #ifdef INET6
1681         struct sockaddr_in6 *sin6;
1682 #endif
1683         u_char *e_addr;
1684
1685         switch(sa->sa_family) {
1686         case AF_LINK:
1687                 /*
1688                  * No mapping needed. Just check that it's a valid MC address.
1689                  */
1690                 sdl = (struct sockaddr_dl *)sa;
1691                 e_addr = LLADDR(sdl);
1692                 if (!IPOIB_IS_MULTICAST(e_addr))
1693                         return EADDRNOTAVAIL;
1694                 *llsa = NULL;
1695                 return 0;
1696
1697 #ifdef INET
1698         case AF_INET:
1699                 sin = (struct sockaddr_in *)sa;
1700                 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
1701                         return EADDRNOTAVAIL;
1702                 sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND);
1703                 sdl->sdl_alen = INFINIBAND_ALEN;
1704                 e_addr = LLADDR(sdl);
1705                 ip_ib_mc_map(sin->sin_addr.s_addr, ifp->if_broadcastaddr,
1706                     e_addr);
1707                 *llsa = (struct sockaddr *)sdl;
1708                 return 0;
1709 #endif
1710 #ifdef INET6
1711         case AF_INET6:
1712                 sin6 = (struct sockaddr_in6 *)sa;
1713                 /*
1714                  * An IP6 address of 0 means listen to all
1715                  * of the multicast address used for IP6.
1716                  * This has no meaning in ipoib.
1717                  */
1718                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
1719                         return EADDRNOTAVAIL;
1720                 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
1721                         return EADDRNOTAVAIL;
1722                 sdl = link_init_sdl(ifp, *llsa, IFT_INFINIBAND);
1723                 sdl->sdl_alen = INFINIBAND_ALEN;
1724                 e_addr = LLADDR(sdl);
1725                 ipv6_ib_mc_map(&sin6->sin6_addr, ifp->if_broadcastaddr, e_addr);
1726                 *llsa = (struct sockaddr *)sdl;
1727                 return 0;
1728 #endif
1729
1730         default:
1731                 return EAFNOSUPPORT;
1732         }
1733 }
1734
1735 module_init(ipoib_init_module);
1736 module_exit(ipoib_cleanup_module);
1737
1738 static int
1739 ipoib_evhand(module_t mod, int event, void *arg)
1740 {
1741                         return (0);
1742 }
1743
1744 static moduledata_t ipoib_mod = {
1745                         .name = "ipoib",
1746                                         .evhand = ipoib_evhand,
1747 };
1748
1749 DECLARE_MODULE(ipoib, ipoib_mod, SI_SUB_LAST, SI_ORDER_ANY);
1750 MODULE_DEPEND(ipoib, ibcore, 1, 1, 1);
1751 MODULE_DEPEND(ipoib, linuxkpi, 1, 1, 1);