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