drivers/infiniband/hw/mlx4/mad.c

   1 /*
   2  * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <rdma/ib_mad.h>
  34 #include <rdma/ib_smi.h>
  35
  36 #include <linux/mlx4/cmd.h>
  37 #include <linux/gfp.h>
  38 #include <rdma/ib_pma.h>
  39
  40 #include "mlx4_ib.h"
  41
  42 enum {
  43         MLX4_IB_VENDOR_CLASS1 = 0x9,
  44         MLX4_IB_VENDOR_CLASS2 = 0xa
  45 };
  46
  47 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey,
  48                  int port, struct ib_wc *in_wc, struct ib_grh *in_grh,
  49                  void *in_mad, void *response_mad)
  50 {
  51         struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
  52         void *inbox;
  53         int err;
  54         u32 in_modifier = port;
  55         u8 op_modifier = 0;
  56
  57         inmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
  58         if (IS_ERR(inmailbox))
  59                 return PTR_ERR(inmailbox);
  60         inbox = inmailbox->buf;
  61
  62         outmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
  63         if (IS_ERR(outmailbox)) {
  64                 mlx4_free_cmd_mailbox(dev->dev, inmailbox);
  65                 return PTR_ERR(outmailbox);
  66         }
  67
  68         memcpy(inbox, in_mad, 256);
  69
  70         /*
  71          * Key check traps can't be generated unless we have in_wc to
  72          * tell us where to send the trap.
  73          */
  74         if (ignore_mkey || !in_wc)
  75                 op_modifier |= 0x1;
  76         if (ignore_bkey || !in_wc)
  77                 op_modifier |= 0x2;
  78
  79         if (in_wc) {
  80                 struct {
  81                         __be32          my_qpn;
  82                         u32             reserved1;
  83                         __be32          rqpn;
  84                         u8              sl;
  85                         u8              g_path;
  86                         u16             reserved2[2];
  87                         __be16          pkey;
  88                         u32             reserved3[11];
  89                         u8              grh[40];
  90                 } *ext_info;
  91
  92                 memset(inbox + 256, 0, 256);
  93                 ext_info = inbox + 256;
  94
  95                 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num);
  96                 ext_info->rqpn   = cpu_to_be32(in_wc->src_qp);
  97                 ext_info->sl     = in_wc->sl << 4;
  98                 ext_info->g_path = in_wc->dlid_path_bits |
  99                         (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
 100                 ext_info->pkey   = cpu_to_be16(in_wc->pkey_index);
 101
 102                 if (in_grh)
 103                         memcpy(ext_info->grh, in_grh, 40);
 104
 105                 op_modifier |= 0x4;
 106
 107                 in_modifier |= in_wc->slid << 16;
 108         }
 109
 110         err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma,
 111                            in_modifier, op_modifier,
 112                            MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
 113                            MLX4_CMD_NATIVE);
 114
 115         if (!err)
 116                 memcpy(response_mad, outmailbox->buf, 256);
 117
 118         mlx4_free_cmd_mailbox(dev->dev, inmailbox);
 119         mlx4_free_cmd_mailbox(dev->dev, outmailbox);
 120
 121         return err;
 122 }
 123
 124 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl)
 125 {
 126         struct ib_ah *new_ah;
 127         struct ib_ah_attr ah_attr;
 128
 129         if (!dev->send_agent[port_num - 1][0])
 130                 return;
 131
 132         memset(&ah_attr, 0, sizeof ah_attr);
 133         ah_attr.dlid     = lid;
 134         ah_attr.sl       = sl;
 135         ah_attr.port_num = port_num;
 136
 137         new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
 138                               &ah_attr);
 139         if (IS_ERR(new_ah))
 140                 return;
 141
 142         spin_lock(&dev->sm_lock);
 143         if (dev->sm_ah[port_num - 1])
 144                 ib_destroy_ah(dev->sm_ah[port_num - 1]);
 145         dev->sm_ah[port_num - 1] = new_ah;
 146         spin_unlock(&dev->sm_lock);
 147 }
 148
 149 /*
 150  * Snoop SM MADs for port info, GUID info, and  P_Key table sets, so we can
 151  * synthesize LID change, Client-Rereg, GID change, and P_Key change events.
 152  */
 153 static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad,
 154                       u16 prev_lid)
 155 {
 156         struct ib_port_info *pinfo;
 157         u16 lid;
 158
 159         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 160         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 161              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 162             mad->mad_hdr.method == IB_MGMT_METHOD_SET)
 163                 switch (mad->mad_hdr.attr_id) {
 164                 case IB_SMP_ATTR_PORT_INFO:
 165                         pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data;
 166                         lid = be16_to_cpu(pinfo->lid);
 167
 168                         update_sm_ah(dev, port_num,
 169                                      be16_to_cpu(pinfo->sm_lid),
 170                                      pinfo->neighbormtu_mastersmsl & 0xf);
 171
 172                         if (pinfo->clientrereg_resv_subnetto & 0x80)
 173                                 mlx4_ib_dispatch_event(dev, port_num,
 174                                                        IB_EVENT_CLIENT_REREGISTER);
 175
 176                         if (prev_lid != lid)
 177                                 mlx4_ib_dispatch_event(dev, port_num,
 178                                                        IB_EVENT_LID_CHANGE);
 179                         break;
 180
 181                 case IB_SMP_ATTR_PKEY_TABLE:
 182                         mlx4_ib_dispatch_event(dev, port_num,
 183                                                IB_EVENT_PKEY_CHANGE);
 184                         break;
 185
 186                 case IB_SMP_ATTR_GUID_INFO:
 187                         mlx4_ib_dispatch_event(dev, port_num,
 188                                                IB_EVENT_GID_CHANGE);
 189                         break;
 190                 default:
 191                         break;
 192                 }
 193 }
 194
 195 static void node_desc_override(struct ib_device *dev,
 196                                struct ib_mad *mad)
 197 {
 198         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 199              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 200             mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
 201             mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
 202                 spin_lock(&to_mdev(dev)->sm_lock);
 203                 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
 204                 spin_unlock(&to_mdev(dev)->sm_lock);
 205         }
 206 }
 207
 208 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad)
 209 {
 210         int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
 211         struct ib_mad_send_buf *send_buf;
 212         struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
 213         int ret;
 214
 215         if (agent) {
 216                 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
 217                                               IB_MGMT_MAD_DATA, GFP_ATOMIC);
 218                 if (IS_ERR(send_buf))
 219                         return;
 220                 /*
 221                  * We rely here on the fact that MLX QPs don't use the
 222                  * address handle after the send is posted (this is
 223                  * wrong following the IB spec strictly, but we know
 224                  * it's OK for our devices).
 225                  */
 226                 spin_lock(&dev->sm_lock);
 227                 memcpy(send_buf->mad, mad, sizeof *mad);
 228                 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
 229                         ret = ib_post_send_mad(send_buf, NULL);
 230                 else
 231                         ret = -EINVAL;
 232                 spin_unlock(&dev->sm_lock);
 233
 234                 if (ret)
 235                         ib_free_send_mad(send_buf);
 236         }
 237 }
 238
 239 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 240                         struct ib_wc *in_wc, struct ib_grh *in_grh,
 241                         struct ib_mad *in_mad, struct ib_mad *out_mad)
 242 {
 243         u16 slid, prev_lid = 0;
 244         int err;
 245         struct ib_port_attr pattr;
 246
 247         if (in_wc && in_wc->qp->qp_num) {
 248                 pr_debug("received MAD: slid:%d sqpn:%d "
 249                         "dlid_bits:%d dqpn:%d wc_flags:0x%x, cls %x, mtd %x, atr %x\n",
 250                         in_wc->slid, in_wc->src_qp,
 251                         in_wc->dlid_path_bits,
 252                         in_wc->qp->qp_num,
 253                         in_wc->wc_flags,
 254                         in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method,
 255                         be16_to_cpu(in_mad->mad_hdr.attr_id));
 256                 if (in_wc->wc_flags & IB_WC_GRH) {
 257                         pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n",
 258                                  be64_to_cpu(in_grh->sgid.global.subnet_prefix),
 259                                  be64_to_cpu(in_grh->sgid.global.interface_id));
 260                         pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n",
 261                                  be64_to_cpu(in_grh->dgid.global.subnet_prefix),
 262                                  be64_to_cpu(in_grh->dgid.global.interface_id));
 263                 }
 264         }
 265
 266         slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
 267
 268         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
 269                 forward_trap(to_mdev(ibdev), port_num, in_mad);
 270                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 271         }
 272
 273         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 274             in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
 275                 if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
 276                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
 277                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
 278                         return IB_MAD_RESULT_SUCCESS;
 279
 280                 /*
 281                  * Don't process SMInfo queries -- the SMA can't handle them.
 282                  */
 283                 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
 284                         return IB_MAD_RESULT_SUCCESS;
 285         } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
 286                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1   ||
 287                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2   ||
 288                    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
 289                 if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
 290                     in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
 291                         return IB_MAD_RESULT_SUCCESS;
 292         } else
 293                 return IB_MAD_RESULT_SUCCESS;
 294
 295         if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 296              in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 297             in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
 298             in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
 299             !ib_query_port(ibdev, port_num, &pattr))
 300                 prev_lid = pattr.lid;
 301
 302         err = mlx4_MAD_IFC(to_mdev(ibdev),
 303                            mad_flags & IB_MAD_IGNORE_MKEY,
 304                            mad_flags & IB_MAD_IGNORE_BKEY,
 305                            port_num, in_wc, in_grh, in_mad, out_mad);
 306         if (err)
 307                 return IB_MAD_RESULT_FAILURE;
 308
 309         if (!out_mad->mad_hdr.status) {
 310                 if (!(to_mdev(ibdev)->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV))
 311                         smp_snoop(ibdev, port_num, in_mad, prev_lid);
 312                 node_desc_override(ibdev, out_mad);
 313         }
 314
 315         /* set return bit in status of directed route responses */
 316         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
 317                 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
 318
 319         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
 320                 /* no response for trap repress */
 321                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 322
 323         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 324 }
 325
 326 static void edit_counter(struct mlx4_counter *cnt,
 327                                         struct ib_pma_portcounters *pma_cnt)
 328 {
 329         pma_cnt->port_xmit_data = cpu_to_be32((be64_to_cpu(cnt->tx_bytes)>>2));
 330         pma_cnt->port_rcv_data  = cpu_to_be32((be64_to_cpu(cnt->rx_bytes)>>2));
 331         pma_cnt->port_xmit_packets = cpu_to_be32(be64_to_cpu(cnt->tx_frames));
 332         pma_cnt->port_rcv_packets  = cpu_to_be32(be64_to_cpu(cnt->rx_frames));
 333 }
 334
 335 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 336                         struct ib_wc *in_wc, struct ib_grh *in_grh,
 337                         struct ib_mad *in_mad, struct ib_mad *out_mad)
 338 {
 339         struct mlx4_cmd_mailbox *mailbox;
 340         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 341         int err;
 342         u32 inmod = dev->counters[port_num - 1] & 0xffff;
 343         u8 mode;
 344
 345         if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
 346                 return -EINVAL;
 347
 348         mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 349         if (IS_ERR(mailbox))
 350                 return IB_MAD_RESULT_FAILURE;
 351
 352         err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0,
 353                            MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C,
 354                            MLX4_CMD_WRAPPED);
 355         if (err)
 356                 err = IB_MAD_RESULT_FAILURE;
 357         else {
 358                 memset(out_mad->data, 0, sizeof out_mad->data);
 359                 mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode;
 360                 switch (mode & 0xf) {
 361                 case 0:
 362                         edit_counter(mailbox->buf,
 363                                                 (void *)(out_mad->data + 40));
 364                         err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 365                         break;
 366                 default:
 367                         err = IB_MAD_RESULT_FAILURE;
 368                 }
 369         }
 370
 371         mlx4_free_cmd_mailbox(dev->dev, mailbox);
 372
 373         return err;
 374 }
 375
 376 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 377                         struct ib_wc *in_wc, struct ib_grh *in_grh,
 378                         struct ib_mad *in_mad, struct ib_mad *out_mad)
 379 {
 380         switch (rdma_port_get_link_layer(ibdev, port_num)) {
 381         case IB_LINK_LAYER_INFINIBAND:
 382                 return ib_process_mad(ibdev, mad_flags, port_num, in_wc,
 383                                       in_grh, in_mad, out_mad);
 384         case IB_LINK_LAYER_ETHERNET:
 385                 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
 386                                           in_grh, in_mad, out_mad);
 387         default:
 388                 return -EINVAL;
 389         }
 390 }
 391
 392 static void send_handler(struct ib_mad_agent *agent,
 393                          struct ib_mad_send_wc *mad_send_wc)
 394 {
 395         ib_free_send_mad(mad_send_wc->send_buf);
 396 }
 397
 398 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
 399 {
 400         struct ib_mad_agent *agent;
 401         int p, q;
 402         int ret;
 403         enum rdma_link_layer ll;
 404
 405         for (p = 0; p < dev->num_ports; ++p) {
 406                 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1);
 407                 for (q = 0; q <= 1; ++q) {
 408                         if (ll == IB_LINK_LAYER_INFINIBAND) {
 409                                 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
 410                                                               q ? IB_QPT_GSI : IB_QPT_SMI,
 411                                                               NULL, 0, send_handler,
 412                                                               NULL, NULL);
 413                                 if (IS_ERR(agent)) {
 414                                         ret = PTR_ERR(agent);
 415                                         goto err;
 416                                 }
 417                                 dev->send_agent[p][q] = agent;
 418                         } else
 419                                 dev->send_agent[p][q] = NULL;
 420                 }
 421         }
 422
 423         return 0;
 424
 425 err:
 426         for (p = 0; p < dev->num_ports; ++p)
 427                 for (q = 0; q <= 1; ++q)
 428                         if (dev->send_agent[p][q])
 429                                 ib_unregister_mad_agent(dev->send_agent[p][q]);
 430
 431         return ret;
 432 }
 433
 434 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
 435 {
 436         struct ib_mad_agent *agent;
 437         int p, q;
 438
 439         for (p = 0; p < dev->num_ports; ++p) {
 440                 for (q = 0; q <= 1; ++q) {
 441                         agent = dev->send_agent[p][q];
 442                         if (agent) {
 443                                 dev->send_agent[p][q] = NULL;
 444                                 ib_unregister_mad_agent(agent);
 445                         }
 446                 }
 447
 448                 if (dev->sm_ah[p])
 449                         ib_destroy_ah(dev->sm_ah[p]);
 450         }
 451 }
 452
 453 void handle_port_mgmt_change_event(struct work_struct *work)
 454 {
 455         struct ib_event_work *ew = container_of(work, struct ib_event_work, work);
 456         struct mlx4_ib_dev *dev = ew->ib_dev;
 457         struct mlx4_eqe *eqe = &(ew->ib_eqe);
 458         u8 port = eqe->event.port_mgmt_change.port;
 459         u32 changed_attr;
 460
 461         switch (eqe->subtype) {
 462         case MLX4_DEV_PMC_SUBTYPE_PORT_INFO:
 463                 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr);
 464
 465                 /* Update the SM ah - This should be done before handling
 466                    the other changed attributes so that MADs can be sent to the SM */
 467                 if (changed_attr & MSTR_SM_CHANGE_MASK) {
 468                         u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid);
 469                         u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf;
 470                         update_sm_ah(dev, port, lid, sl);
 471                 }
 472
 473                 /* Check if it is a lid change event */
 474                 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK)
 475                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_LID_CHANGE);
 476
 477                 /* Generate GUID changed event */
 478                 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK)
 479                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
 480
 481                 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK)
 482                         mlx4_ib_dispatch_event(dev, port,
 483                                                IB_EVENT_CLIENT_REREGISTER);
 484                 break;
 485
 486         case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE:
 487                 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE);
 488                 break;
 489         case MLX4_DEV_PMC_SUBTYPE_GUID_INFO:
 490                 mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
 491                 break;
 492         default:
 493                 pr_warn("Unsupported subtype 0x%x for "
 494                         "Port Management Change event\n", eqe->subtype);
 495         }
 496
 497         kfree(ew);
 498 }
 499
 500 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num,
 501                             enum ib_event_type type)
 502 {
 503         struct ib_event event;
 504
 505         event.device            = &dev->ib_dev;
 506         event.element.port_num  = port_num;
 507         event.event             = type;
 508
 509         ib_dispatch_event(&event);
 510 }