kernel/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 #include <rdma/ib_sa.h>
  36 #include <rdma/ib_cache.h>
  37
  38 #include <linux/random.h>
  39 #include <linux/mlx4/cmd.h>
  40 #include <linux/gfp.h>
  41 #include <rdma/ib_pma.h>
  42
  43 #include "mlx4_ib.h"
  44
  45 enum {
  46         MLX4_IB_VENDOR_CLASS1 = 0x9,
  47         MLX4_IB_VENDOR_CLASS2 = 0xa
  48 };
  49
  50 #define MLX4_TUN_SEND_WRID_SHIFT 34
  51 #define MLX4_TUN_QPN_SHIFT 32
  52 #define MLX4_TUN_WRID_RECV (((u64) 1) << MLX4_TUN_SEND_WRID_SHIFT)
  53 #define MLX4_TUN_SET_WRID_QPN(a) (((u64) ((a) & 0x3)) << MLX4_TUN_QPN_SHIFT)
  54
  55 #define MLX4_TUN_IS_RECV(a)  (((a) >>  MLX4_TUN_SEND_WRID_SHIFT) & 0x1)
  56 #define MLX4_TUN_WRID_QPN(a) (((a) >> MLX4_TUN_QPN_SHIFT) & 0x3)
  57
  58  /* Port mgmt change event handling */
  59
  60 #define GET_BLK_PTR_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.block_ptr)
  61 #define GET_MASK_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.tbl_entries_mask)
  62 #define NUM_IDX_IN_PKEY_TBL_BLK 32
  63 #define GUID_TBL_ENTRY_SIZE 8      /* size in bytes */
  64 #define GUID_TBL_BLK_NUM_ENTRIES 8
  65 #define GUID_TBL_BLK_SIZE (GUID_TBL_ENTRY_SIZE * GUID_TBL_BLK_NUM_ENTRIES)
  66
  67 /* Counters should be saturate once they reach their maximum value */
  68 #define ASSIGN_32BIT_COUNTER(counter, value) do {\
  69         if ((value) > U32_MAX)                   \
  70                 counter = cpu_to_be32(U32_MAX); \
  71         else                                     \
  72                 counter = cpu_to_be32(value);    \
  73 } while (0)
  74
  75 struct mlx4_mad_rcv_buf {
  76         struct ib_grh grh;
  77         u8 payload[256];
  78 } __packed;
  79
  80 struct mlx4_mad_snd_buf {
  81         u8 payload[256];
  82 } __packed;
  83
  84 struct mlx4_tunnel_mad {
  85         struct ib_grh grh;
  86         struct mlx4_ib_tunnel_header hdr;
  87         struct ib_mad mad;
  88 } __packed;
  89
  90 struct mlx4_rcv_tunnel_mad {
  91         struct mlx4_rcv_tunnel_hdr hdr;
  92         struct ib_grh grh;
  93         struct ib_mad mad;
  94 } __packed;
  95
  96 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num);
  97 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num);
  98 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
  99                                 int block, u32 change_bitmap);
 100
 101 __be64 mlx4_ib_gen_node_guid(void)
 102 {
 103 #define NODE_GUID_HI    ((u64) (((u64)IB_OPENIB_OUI) << 40))
 104         return cpu_to_be64(NODE_GUID_HI | prandom_u32());
 105 }
 106
 107 __be64 mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx *ctx)
 108 {
 109         return cpu_to_be64(atomic_inc_return(&ctx->tid)) |
 110                 cpu_to_be64(0xff00000000000000LL);
 111 }
 112
 113 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags,
 114                  int port, struct ib_wc *in_wc, struct ib_grh *in_grh,
 115                  void *in_mad, void *response_mad)
 116 {
 117         struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
 118         void *inbox;
 119         int err;
 120         u32 in_modifier = port;
 121         u8 op_modifier = 0;
 122
 123         inmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 124         if (IS_ERR(inmailbox))
 125                 return PTR_ERR(inmailbox);
 126         inbox = inmailbox->buf;
 127
 128         outmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 129         if (IS_ERR(outmailbox)) {
 130                 mlx4_free_cmd_mailbox(dev->dev, inmailbox);
 131                 return PTR_ERR(outmailbox);
 132         }
 133
 134         memcpy(inbox, in_mad, 256);
 135
 136         /*
 137          * Key check traps can't be generated unless we have in_wc to
 138          * tell us where to send the trap.
 139          */
 140         if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_MKEY) || !in_wc)
 141                 op_modifier |= 0x1;
 142         if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_BKEY) || !in_wc)
 143                 op_modifier |= 0x2;
 144         if (mlx4_is_mfunc(dev->dev) &&
 145             (mad_ifc_flags & MLX4_MAD_IFC_NET_VIEW || in_wc))
 146                 op_modifier |= 0x8;
 147
 148         if (in_wc) {
 149                 struct {
 150                         __be32          my_qpn;
 151                         u32             reserved1;
 152                         __be32          rqpn;
 153                         u8              sl;
 154                         u8              g_path;
 155                         u16             reserved2[2];
 156                         __be16          pkey;
 157                         u32             reserved3[11];
 158                         u8              grh[40];
 159                 } *ext_info;
 160
 161                 memset(inbox + 256, 0, 256);
 162                 ext_info = inbox + 256;
 163
 164                 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num);
 165                 ext_info->rqpn   = cpu_to_be32(in_wc->src_qp);
 166                 ext_info->sl     = in_wc->sl << 4;
 167                 ext_info->g_path = in_wc->dlid_path_bits |
 168                         (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
 169                 ext_info->pkey   = cpu_to_be16(in_wc->pkey_index);
 170
 171                 if (in_grh)
 172                         memcpy(ext_info->grh, in_grh, 40);
 173
 174                 op_modifier |= 0x4;
 175
 176                 in_modifier |= in_wc->slid << 16;
 177         }
 178
 179         err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier,
 180                            mlx4_is_master(dev->dev) ? (op_modifier & ~0x8) : op_modifier,
 181                            MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
 182                            (op_modifier & 0x8) ? MLX4_CMD_NATIVE : MLX4_CMD_WRAPPED);
 183
 184         if (!err)
 185                 memcpy(response_mad, outmailbox->buf, 256);
 186
 187         mlx4_free_cmd_mailbox(dev->dev, inmailbox);
 188         mlx4_free_cmd_mailbox(dev->dev, outmailbox);
 189
 190         return err;
 191 }
 192
 193 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl)
 194 {
 195         struct ib_ah *new_ah;
 196         struct ib_ah_attr ah_attr;
 197         unsigned long flags;
 198
 199         if (!dev->send_agent[port_num - 1][0])
 200                 return;
 201
 202         memset(&ah_attr, 0, sizeof ah_attr);
 203         ah_attr.dlid     = lid;
 204         ah_attr.sl       = sl;
 205         ah_attr.port_num = port_num;
 206
 207         new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
 208                               &ah_attr);
 209         if (IS_ERR(new_ah))
 210                 return;
 211
 212         spin_lock_irqsave(&dev->sm_lock, flags);
 213         if (dev->sm_ah[port_num - 1])
 214                 ib_destroy_ah(dev->sm_ah[port_num - 1]);
 215         dev->sm_ah[port_num - 1] = new_ah;
 216         spin_unlock_irqrestore(&dev->sm_lock, flags);
 217 }
 218
 219 /*
 220  * Snoop SM MADs for port info, GUID info, and  P_Key table sets, so we can
 221  * synthesize LID change, Client-Rereg, GID change, and P_Key change events.
 222  */
 223 static void smp_snoop(struct ib_device *ibdev, u8 port_num, struct ib_mad *mad,
 224                       u16 prev_lid)
 225 {
 226         struct ib_port_info *pinfo;
 227         u16 lid;
 228         __be16 *base;
 229         u32 bn, pkey_change_bitmap;
 230         int i;
 231
 232
 233         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 234         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 235              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 236             mad->mad_hdr.method == IB_MGMT_METHOD_SET)
 237                 switch (mad->mad_hdr.attr_id) {
 238                 case IB_SMP_ATTR_PORT_INFO:
 239                         pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data;
 240                         lid = be16_to_cpu(pinfo->lid);
 241
 242                         update_sm_ah(dev, port_num,
 243                                      be16_to_cpu(pinfo->sm_lid),
 244                                      pinfo->neighbormtu_mastersmsl & 0xf);
 245
 246                         if (pinfo->clientrereg_resv_subnetto & 0x80)
 247                                 handle_client_rereg_event(dev, port_num);
 248
 249                         if (prev_lid != lid)
 250                                 handle_lid_change_event(dev, port_num);
 251                         break;
 252
 253                 case IB_SMP_ATTR_PKEY_TABLE:
 254                         if (!mlx4_is_mfunc(dev->dev)) {
 255                                 mlx4_ib_dispatch_event(dev, port_num,
 256                                                        IB_EVENT_PKEY_CHANGE);
 257                                 break;
 258                         }
 259
 260                         /* at this point, we are running in the master.
 261                          * Slaves do not receive SMPs.
 262                          */
 263                         bn  = be32_to_cpu(((struct ib_smp *)mad)->attr_mod) & 0xFFFF;
 264                         base = (__be16 *) &(((struct ib_smp *)mad)->data[0]);
 265                         pkey_change_bitmap = 0;
 266                         for (i = 0; i < 32; i++) {
 267                                 pr_debug("PKEY[%d] = x%x\n",
 268                                          i + bn*32, be16_to_cpu(base[i]));
 269                                 if (be16_to_cpu(base[i]) !=
 270                                     dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32]) {
 271                                         pkey_change_bitmap |= (1 << i);
 272                                         dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32] =
 273                                                 be16_to_cpu(base[i]);
 274                                 }
 275                         }
 276                         pr_debug("PKEY Change event: port=%d, "
 277                                  "block=0x%x, change_bitmap=0x%x\n",
 278                                  port_num, bn, pkey_change_bitmap);
 279
 280                         if (pkey_change_bitmap) {
 281                                 mlx4_ib_dispatch_event(dev, port_num,
 282                                                        IB_EVENT_PKEY_CHANGE);
 283                                 if (!dev->sriov.is_going_down)
 284                                         __propagate_pkey_ev(dev, port_num, bn,
 285                                                             pkey_change_bitmap);
 286                         }
 287                         break;
 288
 289                 case IB_SMP_ATTR_GUID_INFO:
 290                         /* paravirtualized master's guid is guid 0 -- does not change */
 291                         if (!mlx4_is_master(dev->dev))
 292                                 mlx4_ib_dispatch_event(dev, port_num,
 293                                                        IB_EVENT_GID_CHANGE);
 294                         /*if master, notify relevant slaves*/
 295                         if (mlx4_is_master(dev->dev) &&
 296                             !dev->sriov.is_going_down) {
 297                                 bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod);
 298                                 mlx4_ib_update_cache_on_guid_change(dev, bn, port_num,
 299                                                                     (u8 *)(&((struct ib_smp *)mad)->data));
 300                                 mlx4_ib_notify_slaves_on_guid_change(dev, bn, port_num,
 301                                                                      (u8 *)(&((struct ib_smp *)mad)->data));
 302                         }
 303                         break;
 304
 305                 default:
 306                         break;
 307                 }
 308 }
 309
 310 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
 311                                 int block, u32 change_bitmap)
 312 {
 313         int i, ix, slave, err;
 314         int have_event = 0;
 315
 316         for (slave = 0; slave < dev->dev->caps.sqp_demux; slave++) {
 317                 if (slave == mlx4_master_func_num(dev->dev))
 318                         continue;
 319                 if (!mlx4_is_slave_active(dev->dev, slave))
 320                         continue;
 321
 322                 have_event = 0;
 323                 for (i = 0; i < 32; i++) {
 324                         if (!(change_bitmap & (1 << i)))
 325                                 continue;
 326                         for (ix = 0;
 327                              ix < dev->dev->caps.pkey_table_len[port_num]; ix++) {
 328                                 if (dev->pkeys.virt2phys_pkey[slave][port_num - 1]
 329                                     [ix] == i + 32 * block) {
 330                                         err = mlx4_gen_pkey_eqe(dev->dev, slave, port_num);
 331                                         pr_debug("propagate_pkey_ev: slave %d,"
 332                                                  " port %d, ix %d (%d)\n",
 333                                                  slave, port_num, ix, err);
 334                                         have_event = 1;
 335                                         break;
 336                                 }
 337                         }
 338                         if (have_event)
 339                                 break;
 340                 }
 341         }
 342 }
 343
 344 static void node_desc_override(struct ib_device *dev,
 345                                struct ib_mad *mad)
 346 {
 347         unsigned long flags;
 348
 349         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 350              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 351             mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
 352             mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
 353                 spin_lock_irqsave(&to_mdev(dev)->sm_lock, flags);
 354                 memcpy(((struct ib_smp *) mad)->data, dev->node_desc, 64);
 355                 spin_unlock_irqrestore(&to_mdev(dev)->sm_lock, flags);
 356         }
 357 }
 358
 359 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, struct ib_mad *mad)
 360 {
 361         int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
 362         struct ib_mad_send_buf *send_buf;
 363         struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
 364         int ret;
 365         unsigned long flags;
 366
 367         if (agent) {
 368                 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
 369                                               IB_MGMT_MAD_DATA, GFP_ATOMIC);
 370                 if (IS_ERR(send_buf))
 371                         return;
 372                 /*
 373                  * We rely here on the fact that MLX QPs don't use the
 374                  * address handle after the send is posted (this is
 375                  * wrong following the IB spec strictly, but we know
 376                  * it's OK for our devices).
 377                  */
 378                 spin_lock_irqsave(&dev->sm_lock, flags);
 379                 memcpy(send_buf->mad, mad, sizeof *mad);
 380                 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
 381                         ret = ib_post_send_mad(send_buf, NULL);
 382                 else
 383                         ret = -EINVAL;
 384                 spin_unlock_irqrestore(&dev->sm_lock, flags);
 385
 386                 if (ret)
 387                         ib_free_send_mad(send_buf);
 388         }
 389 }
 390
 391 static int mlx4_ib_demux_sa_handler(struct ib_device *ibdev, int port, int slave,
 392                                                              struct ib_sa_mad *sa_mad)
 393 {
 394         int ret = 0;
 395
 396         /* dispatch to different sa handlers */
 397         switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
 398         case IB_SA_ATTR_MC_MEMBER_REC:
 399                 ret = mlx4_ib_mcg_demux_handler(ibdev, port, slave, sa_mad);
 400                 break;
 401         default:
 402                 break;
 403         }
 404         return ret;
 405 }
 406
 407 int mlx4_ib_find_real_gid(struct ib_device *ibdev, u8 port, __be64 guid)
 408 {
 409         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 410         int i;
 411
 412         for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
 413                 if (dev->sriov.demux[port - 1].guid_cache[i] == guid)
 414                         return i;
 415         }
 416         return -1;
 417 }
 418
 419
 420 static int find_slave_port_pkey_ix(struct mlx4_ib_dev *dev, int slave,
 421                                    u8 port, u16 pkey, u16 *ix)
 422 {
 423         int i, ret;
 424         u8 unassigned_pkey_ix, pkey_ix, partial_ix = 0xFF;
 425         u16 slot_pkey;
 426
 427         if (slave == mlx4_master_func_num(dev->dev))
 428                 return ib_find_cached_pkey(&dev->ib_dev, port, pkey, ix);
 429
 430         unassigned_pkey_ix = dev->dev->phys_caps.pkey_phys_table_len[port] - 1;
 431
 432         for (i = 0; i < dev->dev->caps.pkey_table_len[port]; i++) {
 433                 if (dev->pkeys.virt2phys_pkey[slave][port - 1][i] == unassigned_pkey_ix)
 434                         continue;
 435
 436                 pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][i];
 437
 438                 ret = ib_get_cached_pkey(&dev->ib_dev, port, pkey_ix, &slot_pkey);
 439                 if (ret)
 440                         continue;
 441                 if ((slot_pkey & 0x7FFF) == (pkey & 0x7FFF)) {
 442                         if (slot_pkey & 0x8000) {
 443                                 *ix = (u16) pkey_ix;
 444                                 return 0;
 445                         } else {
 446                                 /* take first partial pkey index found */
 447                                 if (partial_ix == 0xFF)
 448                                         partial_ix = pkey_ix;
 449                         }
 450                 }
 451         }
 452
 453         if (partial_ix < 0xFF) {
 454                 *ix = (u16) partial_ix;
 455                 return 0;
 456         }
 457
 458         return -EINVAL;
 459 }
 460
 461 int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
 462                           enum ib_qp_type dest_qpt, struct ib_wc *wc,
 463                           struct ib_grh *grh, struct ib_mad *mad)
 464 {
 465         struct ib_sge list;
 466         struct ib_send_wr wr, *bad_wr;
 467         struct mlx4_ib_demux_pv_ctx *tun_ctx;
 468         struct mlx4_ib_demux_pv_qp *tun_qp;
 469         struct mlx4_rcv_tunnel_mad *tun_mad;
 470         struct ib_ah_attr attr;
 471         struct ib_ah *ah;
 472         struct ib_qp *src_qp = NULL;
 473         unsigned tun_tx_ix = 0;
 474         int dqpn;
 475         int ret = 0;
 476         u16 tun_pkey_ix;
 477         u16 cached_pkey;
 478         u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
 479
 480         if (dest_qpt > IB_QPT_GSI)
 481                 return -EINVAL;
 482
 483         tun_ctx = dev->sriov.demux[port-1].tun[slave];
 484
 485         /* check if proxy qp created */
 486         if (!tun_ctx || tun_ctx->state != DEMUX_PV_STATE_ACTIVE)
 487                 return -EAGAIN;
 488
 489         if (!dest_qpt)
 490                 tun_qp = &tun_ctx->qp[0];
 491         else
 492                 tun_qp = &tun_ctx->qp[1];
 493
 494         /* compute P_Key index to put in tunnel header for slave */
 495         if (dest_qpt) {
 496                 u16 pkey_ix;
 497                 ret = ib_get_cached_pkey(&dev->ib_dev, port, wc->pkey_index, &cached_pkey);
 498                 if (ret)
 499                         return -EINVAL;
 500
 501                 ret = find_slave_port_pkey_ix(dev, slave, port, cached_pkey, &pkey_ix);
 502                 if (ret)
 503                         return -EINVAL;
 504                 tun_pkey_ix = pkey_ix;
 505         } else
 506                 tun_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
 507
 508         dqpn = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave + port + (dest_qpt * 2) - 1;
 509
 510         /* get tunnel tx data buf for slave */
 511         src_qp = tun_qp->qp;
 512
 513         /* create ah. Just need an empty one with the port num for the post send.
 514          * The driver will set the force loopback bit in post_send */
 515         memset(&attr, 0, sizeof attr);
 516         attr.port_num = port;
 517         if (is_eth) {
 518                 memcpy(&attr.grh.dgid.raw[0], &grh->dgid.raw[0], 16);
 519                 attr.ah_flags = IB_AH_GRH;
 520         }
 521         ah = ib_create_ah(tun_ctx->pd, &attr);
 522         if (IS_ERR(ah))
 523                 return -ENOMEM;
 524
 525         /* allocate tunnel tx buf after pass failure returns */
 526         spin_lock(&tun_qp->tx_lock);
 527         if (tun_qp->tx_ix_head - tun_qp->tx_ix_tail >=
 528             (MLX4_NUM_TUNNEL_BUFS - 1))
 529                 ret = -EAGAIN;
 530         else
 531                 tun_tx_ix = (++tun_qp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
 532         spin_unlock(&tun_qp->tx_lock);
 533         if (ret)
 534                 goto out;
 535
 536         tun_mad = (struct mlx4_rcv_tunnel_mad *) (tun_qp->tx_ring[tun_tx_ix].buf.addr);
 537         if (tun_qp->tx_ring[tun_tx_ix].ah)
 538                 ib_destroy_ah(tun_qp->tx_ring[tun_tx_ix].ah);
 539         tun_qp->tx_ring[tun_tx_ix].ah = ah;
 540         ib_dma_sync_single_for_cpu(&dev->ib_dev,
 541                                    tun_qp->tx_ring[tun_tx_ix].buf.map,
 542                                    sizeof (struct mlx4_rcv_tunnel_mad),
 543                                    DMA_TO_DEVICE);
 544
 545         /* copy over to tunnel buffer */
 546         if (grh)
 547                 memcpy(&tun_mad->grh, grh, sizeof *grh);
 548         memcpy(&tun_mad->mad, mad, sizeof *mad);
 549
 550         /* adjust tunnel data */
 551         tun_mad->hdr.pkey_index = cpu_to_be16(tun_pkey_ix);
 552         tun_mad->hdr.flags_src_qp = cpu_to_be32(wc->src_qp & 0xFFFFFF);
 553         tun_mad->hdr.g_ml_path = (grh && (wc->wc_flags & IB_WC_GRH)) ? 0x80 : 0;
 554
 555         if (is_eth) {
 556                 u16 vlan = 0;
 557                 if (mlx4_get_slave_default_vlan(dev->dev, port, slave, &vlan,
 558                                                 NULL)) {
 559                         /* VST mode */
 560                         if (vlan != wc->vlan_id)
 561                                 /* Packet vlan is not the VST-assigned vlan.
 562                                  * Drop the packet.
 563                                  */
 564                                 goto out;
 565                          else
 566                                 /* Remove the vlan tag before forwarding
 567                                  * the packet to the VF.
 568                                  */
 569                                 vlan = 0xffff;
 570                 } else {
 571                         vlan = wc->vlan_id;
 572                 }
 573
 574                 tun_mad->hdr.sl_vid = cpu_to_be16(vlan);
 575                 memcpy((char *)&tun_mad->hdr.mac_31_0, &(wc->smac[0]), 4);
 576                 memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2);
 577         } else {
 578                 tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12);
 579                 tun_mad->hdr.slid_mac_47_32 = cpu_to_be16(wc->slid);
 580         }
 581
 582         ib_dma_sync_single_for_device(&dev->ib_dev,
 583                                       tun_qp->tx_ring[tun_tx_ix].buf.map,
 584                                       sizeof (struct mlx4_rcv_tunnel_mad),
 585                                       DMA_TO_DEVICE);
 586
 587         list.addr = tun_qp->tx_ring[tun_tx_ix].buf.map;
 588         list.length = sizeof (struct mlx4_rcv_tunnel_mad);
 589         list.lkey = tun_ctx->mr->lkey;
 590
 591         wr.wr.ud.ah = ah;
 592         wr.wr.ud.port_num = port;
 593         wr.wr.ud.remote_qkey = IB_QP_SET_QKEY;
 594         wr.wr.ud.remote_qpn = dqpn;
 595         wr.next = NULL;
 596         wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt);
 597         wr.sg_list = &list;
 598         wr.num_sge = 1;
 599         wr.opcode = IB_WR_SEND;
 600         wr.send_flags = IB_SEND_SIGNALED;
 601
 602         ret = ib_post_send(src_qp, &wr, &bad_wr);
 603 out:
 604         if (ret)
 605                 ib_destroy_ah(ah);
 606         return ret;
 607 }
 608
 609 static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port,
 610                         struct ib_wc *wc, struct ib_grh *grh,
 611                         struct ib_mad *mad)
 612 {
 613         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 614         int err;
 615         int slave;
 616         u8 *slave_id;
 617         int is_eth = 0;
 618
 619         if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
 620                 is_eth = 0;
 621         else
 622                 is_eth = 1;
 623
 624         if (is_eth) {
 625                 if (!(wc->wc_flags & IB_WC_GRH)) {
 626                         mlx4_ib_warn(ibdev, "RoCE grh not present.\n");
 627                         return -EINVAL;
 628                 }
 629                 if (mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_CM) {
 630                         mlx4_ib_warn(ibdev, "RoCE mgmt class is not CM\n");
 631                         return -EINVAL;
 632                 }
 633                 if (mlx4_get_slave_from_roce_gid(dev->dev, port, grh->dgid.raw, &slave)) {
 634                         mlx4_ib_warn(ibdev, "failed matching grh\n");
 635                         return -ENOENT;
 636                 }
 637                 if (slave >= dev->dev->caps.sqp_demux) {
 638                         mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 639                                      slave, dev->dev->caps.sqp_demux);
 640                         return -ENOENT;
 641                 }
 642
 643                 if (mlx4_ib_demux_cm_handler(ibdev, port, NULL, mad))
 644                         return 0;
 645
 646                 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 647                 if (err)
 648                         pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
 649                                  slave, err);
 650                 return 0;
 651         }
 652
 653         /* Initially assume that this mad is for us */
 654         slave = mlx4_master_func_num(dev->dev);
 655
 656         /* See if the slave id is encoded in a response mad */
 657         if (mad->mad_hdr.method & 0x80) {
 658                 slave_id = (u8 *) &mad->mad_hdr.tid;
 659                 slave = *slave_id;
 660                 if (slave != 255) /*255 indicates the dom0*/
 661                         *slave_id = 0; /* remap tid */
 662         }
 663
 664         /* If a grh is present, we demux according to it */
 665         if (wc->wc_flags & IB_WC_GRH) {
 666                 slave = mlx4_ib_find_real_gid(ibdev, port, grh->dgid.global.interface_id);
 667                 if (slave < 0) {
 668                         mlx4_ib_warn(ibdev, "failed matching grh\n");
 669                         return -ENOENT;
 670                 }
 671         }
 672         /* Class-specific handling */
 673         switch (mad->mad_hdr.mgmt_class) {
 674         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
 675         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
 676                 /* 255 indicates the dom0 */
 677                 if (slave != 255 && slave != mlx4_master_func_num(dev->dev)) {
 678                         if (!mlx4_vf_smi_enabled(dev->dev, slave, port))
 679                                 return -EPERM;
 680                         /* for a VF. drop unsolicited MADs */
 681                         if (!(mad->mad_hdr.method & IB_MGMT_METHOD_RESP)) {
 682                                 mlx4_ib_warn(ibdev, "demux QP0. rejecting unsolicited mad for slave %d class 0x%x, method 0x%x\n",
 683                                              slave, mad->mad_hdr.mgmt_class,
 684                                              mad->mad_hdr.method);
 685                                 return -EINVAL;
 686                         }
 687                 }
 688                 break;
 689         case IB_MGMT_CLASS_SUBN_ADM:
 690                 if (mlx4_ib_demux_sa_handler(ibdev, port, slave,
 691                                              (struct ib_sa_mad *) mad))
 692                         return 0;
 693                 break;
 694         case IB_MGMT_CLASS_CM:
 695                 if (mlx4_ib_demux_cm_handler(ibdev, port, &slave, mad))
 696                         return 0;
 697                 break;
 698         case IB_MGMT_CLASS_DEVICE_MGMT:
 699                 if (mad->mad_hdr.method != IB_MGMT_METHOD_GET_RESP)
 700                         return 0;
 701                 break;
 702         default:
 703                 /* Drop unsupported classes for slaves in tunnel mode */
 704                 if (slave != mlx4_master_func_num(dev->dev)) {
 705                         pr_debug("dropping unsupported ingress mad from class:%d "
 706                                  "for slave:%d\n", mad->mad_hdr.mgmt_class, slave);
 707                         return 0;
 708                 }
 709         }
 710         /*make sure that no slave==255 was not handled yet.*/
 711         if (slave >= dev->dev->caps.sqp_demux) {
 712                 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 713                              slave, dev->dev->caps.sqp_demux);
 714                 return -ENOENT;
 715         }
 716
 717         err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 718         if (err)
 719                 pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
 720                          slave, err);
 721         return 0;
 722 }
 723
 724 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 725                         struct ib_wc *in_wc, struct ib_grh *in_grh,
 726                         struct ib_mad *in_mad, struct ib_mad *out_mad)
 727 {
 728         u16 slid, prev_lid = 0;
 729         int err;
 730         struct ib_port_attr pattr;
 731
 732         if (in_wc && in_wc->qp->qp_num) {
 733                 pr_debug("received MAD: slid:%d sqpn:%d "
 734                         "dlid_bits:%d dqpn:%d wc_flags:0x%x, cls %x, mtd %x, atr %x\n",
 735                         in_wc->slid, in_wc->src_qp,
 736                         in_wc->dlid_path_bits,
 737                         in_wc->qp->qp_num,
 738                         in_wc->wc_flags,
 739                         in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method,
 740                         be16_to_cpu(in_mad->mad_hdr.attr_id));
 741                 if (in_wc->wc_flags & IB_WC_GRH) {
 742                         pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n",
 743                                  be64_to_cpu(in_grh->sgid.global.subnet_prefix),
 744                                  be64_to_cpu(in_grh->sgid.global.interface_id));
 745                         pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n",
 746                                  be64_to_cpu(in_grh->dgid.global.subnet_prefix),
 747                                  be64_to_cpu(in_grh->dgid.global.interface_id));
 748                 }
 749         }
 750
 751         slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
 752
 753         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
 754                 forward_trap(to_mdev(ibdev), port_num, in_mad);
 755                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 756         }
 757
 758         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 759             in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
 760                 if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
 761                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
 762                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
 763                         return IB_MAD_RESULT_SUCCESS;
 764
 765                 /*
 766                  * Don't process SMInfo queries -- the SMA can't handle them.
 767                  */
 768                 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
 769                         return IB_MAD_RESULT_SUCCESS;
 770         } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
 771                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1   ||
 772                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2   ||
 773                    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
 774                 if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
 775                     in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
 776                         return IB_MAD_RESULT_SUCCESS;
 777         } else
 778                 return IB_MAD_RESULT_SUCCESS;
 779
 780         if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 781              in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 782             in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
 783             in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
 784             !ib_query_port(ibdev, port_num, &pattr))
 785                 prev_lid = pattr.lid;
 786
 787         err = mlx4_MAD_IFC(to_mdev(ibdev),
 788                            (mad_flags & IB_MAD_IGNORE_MKEY ? MLX4_MAD_IFC_IGNORE_MKEY : 0) |
 789                            (mad_flags & IB_MAD_IGNORE_BKEY ? MLX4_MAD_IFC_IGNORE_BKEY : 0) |
 790                            MLX4_MAD_IFC_NET_VIEW,
 791                            port_num, in_wc, in_grh, in_mad, out_mad);
 792         if (err)
 793                 return IB_MAD_RESULT_FAILURE;
 794
 795         if (!out_mad->mad_hdr.status) {
 796                 if (!(to_mdev(ibdev)->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV))
 797                         smp_snoop(ibdev, port_num, in_mad, prev_lid);
 798                 /* slaves get node desc from FW */
 799                 if (!mlx4_is_slave(to_mdev(ibdev)->dev))
 800                         node_desc_override(ibdev, out_mad);
 801         }
 802
 803         /* set return bit in status of directed route responses */
 804         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
 805                 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
 806
 807         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
 808                 /* no response for trap repress */
 809                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 810
 811         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 812 }
 813
 814 static void edit_counter(struct mlx4_counter *cnt,
 815                                         struct ib_pma_portcounters *pma_cnt)
 816 {
 817         ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_data,
 818                              (be64_to_cpu(cnt->tx_bytes) >> 2));
 819         ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_data,
 820                              (be64_to_cpu(cnt->rx_bytes) >> 2));
 821         ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_packets,
 822                              be64_to_cpu(cnt->tx_frames));
 823         ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_packets,
 824                              be64_to_cpu(cnt->rx_frames));
 825 }
 826
 827 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 828                         struct ib_wc *in_wc, struct ib_grh *in_grh,
 829                         struct ib_mad *in_mad, struct ib_mad *out_mad)
 830 {
 831         struct mlx4_cmd_mailbox *mailbox;
 832         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 833         int err;
 834         u32 inmod = dev->counters[port_num - 1] & 0xffff;
 835         u8 mode;
 836
 837         if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
 838                 return -EINVAL;
 839
 840         mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 841         if (IS_ERR(mailbox))
 842                 return IB_MAD_RESULT_FAILURE;
 843
 844         err = mlx4_cmd_box(dev->dev, 0, mailbox->dma, inmod, 0,
 845                            MLX4_CMD_QUERY_IF_STAT, MLX4_CMD_TIME_CLASS_C,
 846                            MLX4_CMD_WRAPPED);
 847         if (err)
 848                 err = IB_MAD_RESULT_FAILURE;
 849         else {
 850                 memset(out_mad->data, 0, sizeof out_mad->data);
 851                 mode = ((struct mlx4_counter *)mailbox->buf)->counter_mode;
 852                 switch (mode & 0xf) {
 853                 case 0:
 854                         edit_counter(mailbox->buf,
 855                                                 (void *)(out_mad->data + 40));
 856                         err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 857                         break;
 858                 default:
 859                         err = IB_MAD_RESULT_FAILURE;
 860                 }
 861         }
 862
 863         mlx4_free_cmd_mailbox(dev->dev, mailbox);
 864
 865         return err;
 866 }
 867
 868 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 869                         struct ib_wc *in_wc, struct ib_grh *in_grh,
 870                         struct ib_mad *in_mad, struct ib_mad *out_mad)
 871 {
 872         switch (rdma_port_get_link_layer(ibdev, port_num)) {
 873         case IB_LINK_LAYER_INFINIBAND:
 874                 return ib_process_mad(ibdev, mad_flags, port_num, in_wc,
 875                                       in_grh, in_mad, out_mad);
 876         case IB_LINK_LAYER_ETHERNET:
 877                 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
 878                                           in_grh, in_mad, out_mad);
 879         default:
 880                 return -EINVAL;
 881         }
 882 }
 883
 884 static void send_handler(struct ib_mad_agent *agent,
 885                          struct ib_mad_send_wc *mad_send_wc)
 886 {
 887         if (mad_send_wc->send_buf->context[0])
 888                 ib_destroy_ah(mad_send_wc->send_buf->context[0]);
 889         ib_free_send_mad(mad_send_wc->send_buf);
 890 }
 891
 892 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
 893 {
 894         struct ib_mad_agent *agent;
 895         int p, q;
 896         int ret;
 897         enum rdma_link_layer ll;
 898
 899         for (p = 0; p < dev->num_ports; ++p) {
 900                 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1);
 901                 for (q = 0; q <= 1; ++q) {
 902                         if (ll == IB_LINK_LAYER_INFINIBAND) {
 903                                 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
 904                                                               q ? IB_QPT_GSI : IB_QPT_SMI,
 905                                                               NULL, 0, send_handler,
 906                                                               NULL, NULL, 0);
 907                                 if (IS_ERR(agent)) {
 908                                         ret = PTR_ERR(agent);
 909                                         goto err;
 910                                 }
 911                                 dev->send_agent[p][q] = agent;
 912                         } else
 913                                 dev->send_agent[p][q] = NULL;
 914                 }
 915         }
 916
 917         return 0;
 918
 919 err:
 920         for (p = 0; p < dev->num_ports; ++p)
 921                 for (q = 0; q <= 1; ++q)
 922                         if (dev->send_agent[p][q])
 923                                 ib_unregister_mad_agent(dev->send_agent[p][q]);
 924
 925         return ret;
 926 }
 927
 928 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
 929 {
 930         struct ib_mad_agent *agent;
 931         int p, q;
 932
 933         for (p = 0; p < dev->num_ports; ++p) {
 934                 for (q = 0; q <= 1; ++q) {
 935                         agent = dev->send_agent[p][q];
 936                         if (agent) {
 937                                 dev->send_agent[p][q] = NULL;
 938                                 ib_unregister_mad_agent(agent);
 939                         }
 940                 }
 941
 942                 if (dev->sm_ah[p])
 943                         ib_destroy_ah(dev->sm_ah[p]);
 944         }
 945 }
 946
 947 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num)
 948 {
 949         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_LID_CHANGE);
 950
 951         if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
 952                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
 953                                             MLX4_EQ_PORT_INFO_LID_CHANGE_MASK);
 954 }
 955
 956 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num)
 957 {
 958         /* re-configure the alias-guid and mcg's */
 959         if (mlx4_is_master(dev->dev)) {
 960                 mlx4_ib_invalidate_all_guid_record(dev, port_num);
 961
 962                 if (!dev->sriov.is_going_down) {
 963                         mlx4_ib_mcg_port_cleanup(&dev->sriov.demux[port_num - 1], 0);
 964                         mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
 965                                                     MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK);
 966                 }
 967         }
 968         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_CLIENT_REREGISTER);
 969 }
 970
 971 static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
 972                               struct mlx4_eqe *eqe)
 973 {
 974         __propagate_pkey_ev(dev, port_num, GET_BLK_PTR_FROM_EQE(eqe),
 975                             GET_MASK_FROM_EQE(eqe));
 976 }
 977
 978 static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num,
 979                                       u32 guid_tbl_blk_num, u32 change_bitmap)
 980 {
 981         struct ib_smp *in_mad  = NULL;
 982         struct ib_smp *out_mad  = NULL;
 983         u16 i;
 984
 985         if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev))
 986                 return;
 987
 988         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
 989         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 990         if (!in_mad || !out_mad) {
 991                 mlx4_ib_warn(&dev->ib_dev, "failed to allocate memory for guid info mads\n");
 992                 goto out;
 993         }
 994
 995         guid_tbl_blk_num  *= 4;
 996
 997         for (i = 0; i < 4; i++) {
 998                 if (change_bitmap && (!((change_bitmap >> (8 * i)) & 0xff)))
 999                         continue;
1000                 memset(in_mad, 0, sizeof *in_mad);
1001                 memset(out_mad, 0, sizeof *out_mad);
1002
1003                 in_mad->base_version  = 1;
1004                 in_mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
1005                 in_mad->class_version = 1;
1006                 in_mad->method        = IB_MGMT_METHOD_GET;
1007                 in_mad->attr_id       = IB_SMP_ATTR_GUID_INFO;
1008                 in_mad->attr_mod      = cpu_to_be32(guid_tbl_blk_num + i);
1009
1010                 if (mlx4_MAD_IFC(dev,
1011                                  MLX4_MAD_IFC_IGNORE_KEYS | MLX4_MAD_IFC_NET_VIEW,
1012                                  port_num, NULL, NULL, in_mad, out_mad)) {
1013                         mlx4_ib_warn(&dev->ib_dev, "Failed in get GUID INFO MAD_IFC\n");
1014                         goto out;
1015                 }
1016
1017                 mlx4_ib_update_cache_on_guid_change(dev, guid_tbl_blk_num + i,
1018                                                     port_num,
1019                                                     (u8 *)(&((struct ib_smp *)out_mad)->data));
1020                 mlx4_ib_notify_slaves_on_guid_change(dev, guid_tbl_blk_num + i,
1021                                                      port_num,
1022                                                      (u8 *)(&((struct ib_smp *)out_mad)->data));
1023         }
1024
1025 out:
1026         kfree(in_mad);
1027         kfree(out_mad);
1028         return;
1029 }
1030
1031 void handle_port_mgmt_change_event(struct work_struct *work)
1032 {
1033         struct ib_event_work *ew = container_of(work, struct ib_event_work, work);
1034         struct mlx4_ib_dev *dev = ew->ib_dev;
1035         struct mlx4_eqe *eqe = &(ew->ib_eqe);
1036         u8 port = eqe->event.port_mgmt_change.port;
1037         u32 changed_attr;
1038         u32 tbl_block;
1039         u32 change_bitmap;
1040
1041         switch (eqe->subtype) {
1042         case MLX4_DEV_PMC_SUBTYPE_PORT_INFO:
1043                 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr);
1044
1045                 /* Update the SM ah - This should be done before handling
1046                    the other changed attributes so that MADs can be sent to the SM */
1047                 if (changed_attr & MSTR_SM_CHANGE_MASK) {
1048                         u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid);
1049                         u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf;
1050                         update_sm_ah(dev, port, lid, sl);
1051                 }
1052
1053                 /* Check if it is a lid change event */
1054                 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK)
1055                         handle_lid_change_event(dev, port);
1056
1057                 /* Generate GUID changed event */
1058                 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) {
1059                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1060                         /*if master, notify all slaves*/
1061                         if (mlx4_is_master(dev->dev))
1062                                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port,
1063                                                             MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK);
1064                 }
1065
1066                 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK)
1067                         handle_client_rereg_event(dev, port);
1068                 break;
1069
1070         case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE:
1071                 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE);
1072                 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
1073                         propagate_pkey_ev(dev, port, eqe);
1074                 break;
1075         case MLX4_DEV_PMC_SUBTYPE_GUID_INFO:
1076                 /* paravirtualized master's guid is guid 0 -- does not change */
1077                 if (!mlx4_is_master(dev->dev))
1078                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1079                 /*if master, notify relevant slaves*/
1080                 else if (!dev->sriov.is_going_down) {
1081                         tbl_block = GET_BLK_PTR_FROM_EQE(eqe);
1082                         change_bitmap = GET_MASK_FROM_EQE(eqe);
1083                         handle_slaves_guid_change(dev, port, tbl_block, change_bitmap);
1084                 }
1085                 break;
1086         default:
1087                 pr_warn("Unsupported subtype 0x%x for "
1088                         "Port Management Change event\n", eqe->subtype);
1089         }
1090
1091         kfree(ew);
1092 }
1093
1094 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num,
1095                             enum ib_event_type type)
1096 {
1097         struct ib_event event;
1098
1099         event.device            = &dev->ib_dev;
1100         event.element.port_num  = port_num;
1101         event.event             = type;
1102
1103         ib_dispatch_event(&event);
1104 }
1105
1106 static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg)
1107 {
1108         unsigned long flags;
1109         struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context;
1110         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1111         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
1112         if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE)
1113                 queue_work(ctx->wq, &ctx->work);
1114         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
1115 }
1116
1117 static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx,
1118                                   struct mlx4_ib_demux_pv_qp *tun_qp,
1119                                   int index)
1120 {
1121         struct ib_sge sg_list;
1122         struct ib_recv_wr recv_wr, *bad_recv_wr;
1123         int size;
1124
1125         size = (tun_qp->qp->qp_type == IB_QPT_UD) ?
1126                 sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf);
1127
1128         sg_list.addr = tun_qp->ring[index].map;
1129         sg_list.length = size;
1130         sg_list.lkey = ctx->mr->lkey;
1131
1132         recv_wr.next = NULL;
1133         recv_wr.sg_list = &sg_list;
1134         recv_wr.num_sge = 1;
1135         recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV |
1136                 MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt);
1137         ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map,
1138                                       size, DMA_FROM_DEVICE);
1139         return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr);
1140 }
1141
1142 static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port,
1143                 int slave, struct ib_sa_mad *sa_mad)
1144 {
1145         int ret = 0;
1146
1147         /* dispatch to different sa handlers */
1148         switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
1149         case IB_SA_ATTR_MC_MEMBER_REC:
1150                 ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad);
1151                 break;
1152         default:
1153                 break;
1154         }
1155         return ret;
1156 }
1157
1158 static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave)
1159 {
1160         int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave;
1161
1162         return (qpn >= proxy_start && qpn <= proxy_start + 1);
1163 }
1164
1165
1166 int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u8 port,
1167                          enum ib_qp_type dest_qpt, u16 pkey_index,
1168                          u32 remote_qpn, u32 qkey, struct ib_ah_attr *attr,
1169                          u8 *s_mac, struct ib_mad *mad)
1170 {
1171         struct ib_sge list;
1172         struct ib_send_wr wr, *bad_wr;
1173         struct mlx4_ib_demux_pv_ctx *sqp_ctx;
1174         struct mlx4_ib_demux_pv_qp *sqp;
1175         struct mlx4_mad_snd_buf *sqp_mad;
1176         struct ib_ah *ah;
1177         struct ib_qp *send_qp = NULL;
1178         unsigned wire_tx_ix = 0;
1179         int ret = 0;
1180         u16 wire_pkey_ix;
1181         int src_qpnum;
1182         u8 sgid_index;
1183
1184
1185         sqp_ctx = dev->sriov.sqps[port-1];
1186
1187         /* check if proxy qp created */
1188         if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE)
1189                 return -EAGAIN;
1190
1191         if (dest_qpt == IB_QPT_SMI) {
1192                 src_qpnum = 0;
1193                 sqp = &sqp_ctx->qp[0];
1194                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
1195         } else {
1196                 src_qpnum = 1;
1197                 sqp = &sqp_ctx->qp[1];
1198                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index];
1199         }
1200
1201         send_qp = sqp->qp;
1202
1203         /* create ah */
1204         sgid_index = attr->grh.sgid_index;
1205         attr->grh.sgid_index = 0;
1206         ah = ib_create_ah(sqp_ctx->pd, attr);
1207         if (IS_ERR(ah))
1208                 return -ENOMEM;
1209         attr->grh.sgid_index = sgid_index;
1210         to_mah(ah)->av.ib.gid_index = sgid_index;
1211         /* get rid of force-loopback bit */
1212         to_mah(ah)->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF);
1213         spin_lock(&sqp->tx_lock);
1214         if (sqp->tx_ix_head - sqp->tx_ix_tail >=
1215             (MLX4_NUM_TUNNEL_BUFS - 1))
1216                 ret = -EAGAIN;
1217         else
1218                 wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
1219         spin_unlock(&sqp->tx_lock);
1220         if (ret)
1221                 goto out;
1222
1223         sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr);
1224         if (sqp->tx_ring[wire_tx_ix].ah)
1225                 ib_destroy_ah(sqp->tx_ring[wire_tx_ix].ah);
1226         sqp->tx_ring[wire_tx_ix].ah = ah;
1227         ib_dma_sync_single_for_cpu(&dev->ib_dev,
1228                                    sqp->tx_ring[wire_tx_ix].buf.map,
1229                                    sizeof (struct mlx4_mad_snd_buf),
1230                                    DMA_TO_DEVICE);
1231
1232         memcpy(&sqp_mad->payload, mad, sizeof *mad);
1233
1234         ib_dma_sync_single_for_device(&dev->ib_dev,
1235                                       sqp->tx_ring[wire_tx_ix].buf.map,
1236                                       sizeof (struct mlx4_mad_snd_buf),
1237                                       DMA_TO_DEVICE);
1238
1239         list.addr = sqp->tx_ring[wire_tx_ix].buf.map;
1240         list.length = sizeof (struct mlx4_mad_snd_buf);
1241         list.lkey = sqp_ctx->mr->lkey;
1242
1243         wr.wr.ud.ah = ah;
1244         wr.wr.ud.port_num = port;
1245         wr.wr.ud.pkey_index = wire_pkey_ix;
1246         wr.wr.ud.remote_qkey = qkey;
1247         wr.wr.ud.remote_qpn = remote_qpn;
1248         wr.next = NULL;
1249         wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum);
1250         wr.sg_list = &list;
1251         wr.num_sge = 1;
1252         wr.opcode = IB_WR_SEND;
1253         wr.send_flags = IB_SEND_SIGNALED;
1254         if (s_mac)
1255                 memcpy(to_mah(ah)->av.eth.s_mac, s_mac, 6);
1256
1257
1258         ret = ib_post_send(send_qp, &wr, &bad_wr);
1259 out:
1260         if (ret)
1261                 ib_destroy_ah(ah);
1262         return ret;
1263 }
1264
1265 static int get_slave_base_gid_ix(struct mlx4_ib_dev *dev, int slave, int port)
1266 {
1267         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1268                 return slave;
1269         return mlx4_get_base_gid_ix(dev->dev, slave, port);
1270 }
1271
1272 static void fill_in_real_sgid_index(struct mlx4_ib_dev *dev, int slave, int port,
1273                                     struct ib_ah_attr *ah_attr)
1274 {
1275         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1276                 ah_attr->grh.sgid_index = slave;
1277         else
1278                 ah_attr->grh.sgid_index += get_slave_base_gid_ix(dev, slave, port);
1279 }
1280
1281 static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc)
1282 {
1283         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1284         struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)];
1285         int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1);
1286         struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr;
1287         struct mlx4_ib_ah ah;
1288         struct ib_ah_attr ah_attr;
1289         u8 *slave_id;
1290         int slave;
1291         int port;
1292
1293         /* Get slave that sent this packet */
1294         if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn ||
1295             wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX ||
1296             (wc->src_qp & 0x1) != ctx->port - 1 ||
1297             wc->src_qp & 0x4) {
1298                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp);
1299                 return;
1300         }
1301         slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8;
1302         if (slave != ctx->slave) {
1303                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: "
1304                              "belongs to another slave\n", wc->src_qp);
1305                 return;
1306         }
1307
1308         /* Map transaction ID */
1309         ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map,
1310                                    sizeof (struct mlx4_tunnel_mad),
1311                                    DMA_FROM_DEVICE);
1312         switch (tunnel->mad.mad_hdr.method) {
1313         case IB_MGMT_METHOD_SET:
1314         case IB_MGMT_METHOD_GET:
1315         case IB_MGMT_METHOD_REPORT:
1316         case IB_SA_METHOD_GET_TABLE:
1317         case IB_SA_METHOD_DELETE:
1318         case IB_SA_METHOD_GET_MULTI:
1319         case IB_SA_METHOD_GET_TRACE_TBL:
1320                 slave_id = (u8 *) &tunnel->mad.mad_hdr.tid;
1321                 if (*slave_id) {
1322                         mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d "
1323                                      "class:%d slave:%d\n", *slave_id,
1324                                      tunnel->mad.mad_hdr.mgmt_class, slave);
1325                         return;
1326                 } else
1327                         *slave_id = slave;
1328         default:
1329                 /* nothing */;
1330         }
1331
1332         /* Class-specific handling */
1333         switch (tunnel->mad.mad_hdr.mgmt_class) {
1334         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1335         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1336                 if (slave != mlx4_master_func_num(dev->dev) &&
1337                     !mlx4_vf_smi_enabled(dev->dev, slave, ctx->port))
1338                         return;
1339                 break;
1340         case IB_MGMT_CLASS_SUBN_ADM:
1341                 if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave,
1342                               (struct ib_sa_mad *) &tunnel->mad))
1343                         return;
1344                 break;
1345         case IB_MGMT_CLASS_CM:
1346                 if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave,
1347                               (struct ib_mad *) &tunnel->mad))
1348                         return;
1349                 break;
1350         case IB_MGMT_CLASS_DEVICE_MGMT:
1351                 if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET &&
1352                     tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET)
1353                         return;
1354                 break;
1355         default:
1356                 /* Drop unsupported classes for slaves in tunnel mode */
1357                 if (slave != mlx4_master_func_num(dev->dev)) {
1358                         mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d "
1359                                      "for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave);
1360                         return;
1361                 }
1362         }
1363
1364         /* We are using standard ib_core services to send the mad, so generate a
1365          * stadard address handle by decoding the tunnelled mlx4_ah fields */
1366         memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av));
1367         ah.ibah.device = ctx->ib_dev;
1368         mlx4_ib_query_ah(&ah.ibah, &ah_attr);
1369         if (ah_attr.ah_flags & IB_AH_GRH)
1370                 fill_in_real_sgid_index(dev, slave, ctx->port, &ah_attr);
1371
1372         port = mlx4_slave_convert_port(dev->dev, slave, ah_attr.port_num);
1373         if (port < 0)
1374                 return;
1375         ah_attr.port_num = port;
1376         memcpy(ah_attr.dmac, tunnel->hdr.mac, 6);
1377         ah_attr.vlan_id = be16_to_cpu(tunnel->hdr.vlan);
1378         /* if slave have default vlan use it */
1379         mlx4_get_slave_default_vlan(dev->dev, ctx->port, slave,
1380                                     &ah_attr.vlan_id, &ah_attr.sl);
1381
1382         mlx4_ib_send_to_wire(dev, slave, ctx->port,
1383                              is_proxy_qp0(dev, wc->src_qp, slave) ?
1384                              IB_QPT_SMI : IB_QPT_GSI,
1385                              be16_to_cpu(tunnel->hdr.pkey_index),
1386                              be32_to_cpu(tunnel->hdr.remote_qpn),
1387                              be32_to_cpu(tunnel->hdr.qkey),
1388                              &ah_attr, wc->smac, &tunnel->mad);
1389 }
1390
1391 static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1392                                  enum ib_qp_type qp_type, int is_tun)
1393 {
1394         int i;
1395         struct mlx4_ib_demux_pv_qp *tun_qp;
1396         int rx_buf_size, tx_buf_size;
1397
1398         if (qp_type > IB_QPT_GSI)
1399                 return -EINVAL;
1400
1401         tun_qp = &ctx->qp[qp_type];
1402
1403         tun_qp->ring = kzalloc(sizeof (struct mlx4_ib_buf) * MLX4_NUM_TUNNEL_BUFS,
1404                                GFP_KERNEL);
1405         if (!tun_qp->ring)
1406                 return -ENOMEM;
1407
1408         tun_qp->tx_ring = kcalloc(MLX4_NUM_TUNNEL_BUFS,
1409                                   sizeof (struct mlx4_ib_tun_tx_buf),
1410                                   GFP_KERNEL);
1411         if (!tun_qp->tx_ring) {
1412                 kfree(tun_qp->ring);
1413                 tun_qp->ring = NULL;
1414                 return -ENOMEM;
1415         }
1416
1417         if (is_tun) {
1418                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1419                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1420         } else {
1421                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1422                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1423         }
1424
1425         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1426                 tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL);
1427                 if (!tun_qp->ring[i].addr)
1428                         goto err;
1429                 tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev,
1430                                                         tun_qp->ring[i].addr,
1431                                                         rx_buf_size,
1432                                                         DMA_FROM_DEVICE);
1433                 if (ib_dma_mapping_error(ctx->ib_dev, tun_qp->ring[i].map)) {
1434                         kfree(tun_qp->ring[i].addr);
1435                         goto err;
1436                 }
1437         }
1438
1439         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1440                 tun_qp->tx_ring[i].buf.addr =
1441                         kmalloc(tx_buf_size, GFP_KERNEL);
1442                 if (!tun_qp->tx_ring[i].buf.addr)
1443                         goto tx_err;
1444                 tun_qp->tx_ring[i].buf.map =
1445                         ib_dma_map_single(ctx->ib_dev,
1446                                           tun_qp->tx_ring[i].buf.addr,
1447                                           tx_buf_size,
1448                                           DMA_TO_DEVICE);
1449                 if (ib_dma_mapping_error(ctx->ib_dev,
1450                                          tun_qp->tx_ring[i].buf.map)) {
1451                         kfree(tun_qp->tx_ring[i].buf.addr);
1452                         goto tx_err;
1453                 }
1454                 tun_qp->tx_ring[i].ah = NULL;
1455         }
1456         spin_lock_init(&tun_qp->tx_lock);
1457         tun_qp->tx_ix_head = 0;
1458         tun_qp->tx_ix_tail = 0;
1459         tun_qp->proxy_qpt = qp_type;
1460
1461         return 0;
1462
1463 tx_err:
1464         while (i > 0) {
1465                 --i;
1466                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1467                                     tx_buf_size, DMA_TO_DEVICE);
1468                 kfree(tun_qp->tx_ring[i].buf.addr);
1469         }
1470         kfree(tun_qp->tx_ring);
1471         tun_qp->tx_ring = NULL;
1472         i = MLX4_NUM_TUNNEL_BUFS;
1473 err:
1474         while (i > 0) {
1475                 --i;
1476                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1477                                     rx_buf_size, DMA_FROM_DEVICE);
1478                 kfree(tun_qp->ring[i].addr);
1479         }
1480         kfree(tun_qp->ring);
1481         tun_qp->ring = NULL;
1482         return -ENOMEM;
1483 }
1484
1485 static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1486                                      enum ib_qp_type qp_type, int is_tun)
1487 {
1488         int i;
1489         struct mlx4_ib_demux_pv_qp *tun_qp;
1490         int rx_buf_size, tx_buf_size;
1491
1492         if (qp_type > IB_QPT_GSI)
1493                 return;
1494
1495         tun_qp = &ctx->qp[qp_type];
1496         if (is_tun) {
1497                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1498                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1499         } else {
1500                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1501                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1502         }
1503
1504
1505         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1506                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1507                                     rx_buf_size, DMA_FROM_DEVICE);
1508                 kfree(tun_qp->ring[i].addr);
1509         }
1510
1511         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1512                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1513                                     tx_buf_size, DMA_TO_DEVICE);
1514                 kfree(tun_qp->tx_ring[i].buf.addr);
1515                 if (tun_qp->tx_ring[i].ah)
1516                         ib_destroy_ah(tun_qp->tx_ring[i].ah);
1517         }
1518         kfree(tun_qp->tx_ring);
1519         kfree(tun_qp->ring);
1520 }
1521
1522 static void mlx4_ib_tunnel_comp_worker(struct work_struct *work)
1523 {
1524         struct mlx4_ib_demux_pv_ctx *ctx;
1525         struct mlx4_ib_demux_pv_qp *tun_qp;
1526         struct ib_wc wc;
1527         int ret;
1528         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1529         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1530
1531         while (ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1532                 tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1533                 if (wc.status == IB_WC_SUCCESS) {
1534                         switch (wc.opcode) {
1535                         case IB_WC_RECV:
1536                                 mlx4_ib_multiplex_mad(ctx, &wc);
1537                                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp,
1538                                                              wc.wr_id &
1539                                                              (MLX4_NUM_TUNNEL_BUFS - 1));
1540                                 if (ret)
1541                                         pr_err("Failed reposting tunnel "
1542                                                "buf:%lld\n", wc.wr_id);
1543                                 break;
1544                         case IB_WC_SEND:
1545                                 pr_debug("received tunnel send completion:"
1546                                          "wrid=0x%llx, status=0x%x\n",
1547                                          wc.wr_id, wc.status);
1548                                 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1549                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1550                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1551                                         = NULL;
1552                                 spin_lock(&tun_qp->tx_lock);
1553                                 tun_qp->tx_ix_tail++;
1554                                 spin_unlock(&tun_qp->tx_lock);
1555
1556                                 break;
1557                         default:
1558                                 break;
1559                         }
1560                 } else  {
1561                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1562                                  " status = %d, wrid = 0x%llx\n",
1563                                  ctx->slave, wc.status, wc.wr_id);
1564                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1565                                 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1566                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1567                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1568                                         = NULL;
1569                                 spin_lock(&tun_qp->tx_lock);
1570                                 tun_qp->tx_ix_tail++;
1571                                 spin_unlock(&tun_qp->tx_lock);
1572                         }
1573                 }
1574         }
1575 }
1576
1577 static void pv_qp_event_handler(struct ib_event *event, void *qp_context)
1578 {
1579         struct mlx4_ib_demux_pv_ctx *sqp = qp_context;
1580
1581         /* It's worse than that! He's dead, Jim! */
1582         pr_err("Fatal error (%d) on a MAD QP on port %d\n",
1583                event->event, sqp->port);
1584 }
1585
1586 static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx,
1587                             enum ib_qp_type qp_type, int create_tun)
1588 {
1589         int i, ret;
1590         struct mlx4_ib_demux_pv_qp *tun_qp;
1591         struct mlx4_ib_qp_tunnel_init_attr qp_init_attr;
1592         struct ib_qp_attr attr;
1593         int qp_attr_mask_INIT;
1594
1595         if (qp_type > IB_QPT_GSI)
1596                 return -EINVAL;
1597
1598         tun_qp = &ctx->qp[qp_type];
1599
1600         memset(&qp_init_attr, 0, sizeof qp_init_attr);
1601         qp_init_attr.init_attr.send_cq = ctx->cq;
1602         qp_init_attr.init_attr.recv_cq = ctx->cq;
1603         qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
1604         qp_init_attr.init_attr.cap.max_send_wr = MLX4_NUM_TUNNEL_BUFS;
1605         qp_init_attr.init_attr.cap.max_recv_wr = MLX4_NUM_TUNNEL_BUFS;
1606         qp_init_attr.init_attr.cap.max_send_sge = 1;
1607         qp_init_attr.init_attr.cap.max_recv_sge = 1;
1608         if (create_tun) {
1609                 qp_init_attr.init_attr.qp_type = IB_QPT_UD;
1610                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_TUNNEL_QP;
1611                 qp_init_attr.port = ctx->port;
1612                 qp_init_attr.slave = ctx->slave;
1613                 qp_init_attr.proxy_qp_type = qp_type;
1614                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX |
1615                            IB_QP_QKEY | IB_QP_PORT;
1616         } else {
1617                 qp_init_attr.init_attr.qp_type = qp_type;
1618                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_SQP;
1619                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY;
1620         }
1621         qp_init_attr.init_attr.port_num = ctx->port;
1622         qp_init_attr.init_attr.qp_context = ctx;
1623         qp_init_attr.init_attr.event_handler = pv_qp_event_handler;
1624         tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr);
1625         if (IS_ERR(tun_qp->qp)) {
1626                 ret = PTR_ERR(tun_qp->qp);
1627                 tun_qp->qp = NULL;
1628                 pr_err("Couldn't create %s QP (%d)\n",
1629                        create_tun ? "tunnel" : "special", ret);
1630                 return ret;
1631         }
1632
1633         memset(&attr, 0, sizeof attr);
1634         attr.qp_state = IB_QPS_INIT;
1635         ret = 0;
1636         if (create_tun)
1637                 ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave,
1638                                               ctx->port, IB_DEFAULT_PKEY_FULL,
1639                                               &attr.pkey_index);
1640         if (ret || !create_tun)
1641                 attr.pkey_index =
1642                         to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0];
1643         attr.qkey = IB_QP1_QKEY;
1644         attr.port_num = ctx->port;
1645         ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT);
1646         if (ret) {
1647                 pr_err("Couldn't change %s qp state to INIT (%d)\n",
1648                        create_tun ? "tunnel" : "special", ret);
1649                 goto err_qp;
1650         }
1651         attr.qp_state = IB_QPS_RTR;
1652         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE);
1653         if (ret) {
1654                 pr_err("Couldn't change %s qp state to RTR (%d)\n",
1655                        create_tun ? "tunnel" : "special", ret);
1656                 goto err_qp;
1657         }
1658         attr.qp_state = IB_QPS_RTS;
1659         attr.sq_psn = 0;
1660         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN);
1661         if (ret) {
1662                 pr_err("Couldn't change %s qp state to RTS (%d)\n",
1663                        create_tun ? "tunnel" : "special", ret);
1664                 goto err_qp;
1665         }
1666
1667         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1668                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i);
1669                 if (ret) {
1670                         pr_err(" mlx4_ib_post_pv_buf error"
1671                                " (err = %d, i = %d)\n", ret, i);
1672                         goto err_qp;
1673                 }
1674         }
1675         return 0;
1676
1677 err_qp:
1678         ib_destroy_qp(tun_qp->qp);
1679         tun_qp->qp = NULL;
1680         return ret;
1681 }
1682
1683 /*
1684  * IB MAD completion callback for real SQPs
1685  */
1686 static void mlx4_ib_sqp_comp_worker(struct work_struct *work)
1687 {
1688         struct mlx4_ib_demux_pv_ctx *ctx;
1689         struct mlx4_ib_demux_pv_qp *sqp;
1690         struct ib_wc wc;
1691         struct ib_grh *grh;
1692         struct ib_mad *mad;
1693
1694         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1695         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1696
1697         while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1698                 sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1699                 if (wc.status == IB_WC_SUCCESS) {
1700                         switch (wc.opcode) {
1701                         case IB_WC_SEND:
1702                                 ib_destroy_ah(sqp->tx_ring[wc.wr_id &
1703                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1704                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1705                                         = NULL;
1706                                 spin_lock(&sqp->tx_lock);
1707                                 sqp->tx_ix_tail++;
1708                                 spin_unlock(&sqp->tx_lock);
1709                                 break;
1710                         case IB_WC_RECV:
1711                                 mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *)
1712                                                 (sqp->ring[wc.wr_id &
1713                                                 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->payload);
1714                                 grh = &(((struct mlx4_mad_rcv_buf *)
1715                                                 (sqp->ring[wc.wr_id &
1716                                                 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->grh);
1717                                 mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad);
1718                                 if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id &
1719                                                            (MLX4_NUM_TUNNEL_BUFS - 1)))
1720                                         pr_err("Failed reposting SQP "
1721                                                "buf:%lld\n", wc.wr_id);
1722                                 break;
1723                         default:
1724                                 BUG_ON(1);
1725                                 break;
1726                         }
1727                 } else  {
1728                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1729                                  " status = %d, wrid = 0x%llx\n",
1730                                  ctx->slave, wc.status, wc.wr_id);
1731                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1732                                 ib_destroy_ah(sqp->tx_ring[wc.wr_id &
1733                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1734                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1735                                         = NULL;
1736                                 spin_lock(&sqp->tx_lock);
1737                                 sqp->tx_ix_tail++;
1738                                 spin_unlock(&sqp->tx_lock);
1739                         }
1740                 }
1741         }
1742 }
1743
1744 static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port,
1745                                struct mlx4_ib_demux_pv_ctx **ret_ctx)
1746 {
1747         struct mlx4_ib_demux_pv_ctx *ctx;
1748
1749         *ret_ctx = NULL;
1750         ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL);
1751         if (!ctx) {
1752                 pr_err("failed allocating pv resource context "
1753                        "for port %d, slave %d\n", port, slave);
1754                 return -ENOMEM;
1755         }
1756
1757         ctx->ib_dev = &dev->ib_dev;
1758         ctx->port = port;
1759         ctx->slave = slave;
1760         *ret_ctx = ctx;
1761         return 0;
1762 }
1763
1764 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port)
1765 {
1766         if (dev->sriov.demux[port - 1].tun[slave]) {
1767                 kfree(dev->sriov.demux[port - 1].tun[slave]);
1768                 dev->sriov.demux[port - 1].tun[slave] = NULL;
1769         }
1770 }
1771
1772 static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
1773                                int create_tun, struct mlx4_ib_demux_pv_ctx *ctx)
1774 {
1775         int ret, cq_size;
1776
1777         if (ctx->state != DEMUX_PV_STATE_DOWN)
1778                 return -EEXIST;
1779
1780         ctx->state = DEMUX_PV_STATE_STARTING;
1781         /* have QP0 only if link layer is IB */
1782         if (rdma_port_get_link_layer(ibdev, ctx->port) ==
1783             IB_LINK_LAYER_INFINIBAND)
1784                 ctx->has_smi = 1;
1785
1786         if (ctx->has_smi) {
1787                 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun);
1788                 if (ret) {
1789                         pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret);
1790                         goto err_out;
1791                 }
1792         }
1793
1794         ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun);
1795         if (ret) {
1796                 pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret);
1797                 goto err_out_qp0;
1798         }
1799
1800         cq_size = 2 * MLX4_NUM_TUNNEL_BUFS;
1801         if (ctx->has_smi)
1802                 cq_size *= 2;
1803
1804         ctx->cq = ib_create_cq(ctx->ib_dev, mlx4_ib_tunnel_comp_handler,
1805                                NULL, ctx, cq_size, 0);
1806         if (IS_ERR(ctx->cq)) {
1807                 ret = PTR_ERR(ctx->cq);
1808                 pr_err("Couldn't create tunnel CQ (%d)\n", ret);
1809                 goto err_buf;
1810         }
1811
1812         ctx->pd = ib_alloc_pd(ctx->ib_dev);
1813         if (IS_ERR(ctx->pd)) {
1814                 ret = PTR_ERR(ctx->pd);
1815                 pr_err("Couldn't create tunnel PD (%d)\n", ret);
1816                 goto err_cq;
1817         }
1818
1819         ctx->mr = ib_get_dma_mr(ctx->pd, IB_ACCESS_LOCAL_WRITE);
1820         if (IS_ERR(ctx->mr)) {
1821                 ret = PTR_ERR(ctx->mr);
1822                 pr_err("Couldn't get tunnel DMA MR (%d)\n", ret);
1823                 goto err_pd;
1824         }
1825
1826         if (ctx->has_smi) {
1827                 ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun);
1828                 if (ret) {
1829                         pr_err("Couldn't create %s QP0 (%d)\n",
1830                                create_tun ? "tunnel for" : "",  ret);
1831                         goto err_mr;
1832                 }
1833         }
1834
1835         ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun);
1836         if (ret) {
1837                 pr_err("Couldn't create %s QP1 (%d)\n",
1838                        create_tun ? "tunnel for" : "",  ret);
1839                 goto err_qp0;
1840         }
1841
1842         if (create_tun)
1843                 INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker);
1844         else
1845                 INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker);
1846
1847         ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq;
1848
1849         ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1850         if (ret) {
1851                 pr_err("Couldn't arm tunnel cq (%d)\n", ret);
1852                 goto err_wq;
1853         }
1854         ctx->state = DEMUX_PV_STATE_ACTIVE;
1855         return 0;
1856
1857 err_wq:
1858         ctx->wq = NULL;
1859         ib_destroy_qp(ctx->qp[1].qp);
1860         ctx->qp[1].qp = NULL;
1861
1862
1863 err_qp0:
1864         if (ctx->has_smi)
1865                 ib_destroy_qp(ctx->qp[0].qp);
1866         ctx->qp[0].qp = NULL;
1867
1868 err_mr:
1869         ib_dereg_mr(ctx->mr);
1870         ctx->mr = NULL;
1871
1872 err_pd:
1873         ib_dealloc_pd(ctx->pd);
1874         ctx->pd = NULL;
1875
1876 err_cq:
1877         ib_destroy_cq(ctx->cq);
1878         ctx->cq = NULL;
1879
1880 err_buf:
1881         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun);
1882
1883 err_out_qp0:
1884         if (ctx->has_smi)
1885                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun);
1886 err_out:
1887         ctx->state = DEMUX_PV_STATE_DOWN;
1888         return ret;
1889 }
1890
1891 static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port,
1892                                  struct mlx4_ib_demux_pv_ctx *ctx, int flush)
1893 {
1894         if (!ctx)
1895                 return;
1896         if (ctx->state > DEMUX_PV_STATE_DOWN) {
1897                 ctx->state = DEMUX_PV_STATE_DOWNING;
1898                 if (flush)
1899                         flush_workqueue(ctx->wq);
1900                 if (ctx->has_smi) {
1901                         ib_destroy_qp(ctx->qp[0].qp);
1902                         ctx->qp[0].qp = NULL;
1903                         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1);
1904                 }
1905                 ib_destroy_qp(ctx->qp[1].qp);
1906                 ctx->qp[1].qp = NULL;
1907                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1);
1908                 ib_dereg_mr(ctx->mr);
1909                 ctx->mr = NULL;
1910                 ib_dealloc_pd(ctx->pd);
1911                 ctx->pd = NULL;
1912                 ib_destroy_cq(ctx->cq);
1913                 ctx->cq = NULL;
1914                 ctx->state = DEMUX_PV_STATE_DOWN;
1915         }
1916 }
1917
1918 static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave,
1919                                   int port, int do_init)
1920 {
1921         int ret = 0;
1922
1923         if (!do_init) {
1924                 clean_vf_mcast(&dev->sriov.demux[port - 1], slave);
1925                 /* for master, destroy real sqp resources */
1926                 if (slave == mlx4_master_func_num(dev->dev))
1927                         destroy_pv_resources(dev, slave, port,
1928                                              dev->sriov.sqps[port - 1], 1);
1929                 /* destroy the tunnel qp resources */
1930                 destroy_pv_resources(dev, slave, port,
1931                                      dev->sriov.demux[port - 1].tun[slave], 1);
1932                 return 0;
1933         }
1934
1935         /* create the tunnel qp resources */
1936         ret = create_pv_resources(&dev->ib_dev, slave, port, 1,
1937                                   dev->sriov.demux[port - 1].tun[slave]);
1938
1939         /* for master, create the real sqp resources */
1940         if (!ret && slave == mlx4_master_func_num(dev->dev))
1941                 ret = create_pv_resources(&dev->ib_dev, slave, port, 0,
1942                                           dev->sriov.sqps[port - 1]);
1943         return ret;
1944 }
1945
1946 void mlx4_ib_tunnels_update_work(struct work_struct *work)
1947 {
1948         struct mlx4_ib_demux_work *dmxw;
1949
1950         dmxw = container_of(work, struct mlx4_ib_demux_work, work);
1951         mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port,
1952                                dmxw->do_init);
1953         kfree(dmxw);
1954         return;
1955 }
1956
1957 static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev,
1958                                        struct mlx4_ib_demux_ctx *ctx,
1959                                        int port)
1960 {
1961         char name[12];
1962         int ret = 0;
1963         int i;
1964
1965         ctx->tun = kcalloc(dev->dev->caps.sqp_demux,
1966                            sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL);
1967         if (!ctx->tun)
1968                 return -ENOMEM;
1969
1970         ctx->dev = dev;
1971         ctx->port = port;
1972         ctx->ib_dev = &dev->ib_dev;
1973
1974         for (i = 0;
1975              i < min(dev->dev->caps.sqp_demux,
1976              (u16)(dev->dev->persist->num_vfs + 1));
1977              i++) {
1978                 struct mlx4_active_ports actv_ports =
1979                         mlx4_get_active_ports(dev->dev, i);
1980
1981                 if (!test_bit(port - 1, actv_ports.ports))
1982                         continue;
1983
1984                 ret = alloc_pv_object(dev, i, port, &ctx->tun[i]);
1985                 if (ret) {
1986                         ret = -ENOMEM;
1987                         goto err_mcg;
1988                 }
1989         }
1990
1991         ret = mlx4_ib_mcg_port_init(ctx);
1992         if (ret) {
1993                 pr_err("Failed initializing mcg para-virt (%d)\n", ret);
1994                 goto err_mcg;
1995         }
1996
1997         snprintf(name, sizeof name, "mlx4_ibt%d", port);
1998         ctx->wq = create_singlethread_workqueue(name);
1999         if (!ctx->wq) {
2000                 pr_err("Failed to create tunnelling WQ for port %d\n", port);
2001                 ret = -ENOMEM;
2002                 goto err_wq;
2003         }
2004
2005         snprintf(name, sizeof name, "mlx4_ibud%d", port);
2006         ctx->ud_wq = create_singlethread_workqueue(name);
2007         if (!ctx->ud_wq) {
2008                 pr_err("Failed to create up/down WQ for port %d\n", port);
2009                 ret = -ENOMEM;
2010                 goto err_udwq;
2011         }
2012
2013         return 0;
2014
2015 err_udwq:
2016         destroy_workqueue(ctx->wq);
2017         ctx->wq = NULL;
2018
2019 err_wq:
2020         mlx4_ib_mcg_port_cleanup(ctx, 1);
2021 err_mcg:
2022         for (i = 0; i < dev->dev->caps.sqp_demux; i++)
2023                 free_pv_object(dev, i, port);
2024         kfree(ctx->tun);
2025         ctx->tun = NULL;
2026         return ret;
2027 }
2028
2029 static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx)
2030 {
2031         if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) {
2032                 sqp_ctx->state = DEMUX_PV_STATE_DOWNING;
2033                 flush_workqueue(sqp_ctx->wq);
2034                 if (sqp_ctx->has_smi) {
2035                         ib_destroy_qp(sqp_ctx->qp[0].qp);
2036                         sqp_ctx->qp[0].qp = NULL;
2037                         mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0);
2038                 }
2039                 ib_destroy_qp(sqp_ctx->qp[1].qp);
2040                 sqp_ctx->qp[1].qp = NULL;
2041                 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0);
2042                 ib_dereg_mr(sqp_ctx->mr);
2043                 sqp_ctx->mr = NULL;
2044                 ib_dealloc_pd(sqp_ctx->pd);
2045                 sqp_ctx->pd = NULL;
2046                 ib_destroy_cq(sqp_ctx->cq);
2047                 sqp_ctx->cq = NULL;
2048                 sqp_ctx->state = DEMUX_PV_STATE_DOWN;
2049         }
2050 }
2051
2052 static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx)
2053 {
2054         int i;
2055         if (ctx) {
2056                 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
2057                 mlx4_ib_mcg_port_cleanup(ctx, 1);
2058                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2059                         if (!ctx->tun[i])
2060                                 continue;
2061                         if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN)
2062                                 ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING;
2063                 }
2064                 flush_workqueue(ctx->wq);
2065                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2066                         destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0);
2067                         free_pv_object(dev, i, ctx->port);
2068                 }
2069                 kfree(ctx->tun);
2070                 destroy_workqueue(ctx->ud_wq);
2071                 destroy_workqueue(ctx->wq);
2072         }
2073 }
2074
2075 static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init)
2076 {
2077         int i;
2078
2079         if (!mlx4_is_master(dev->dev))
2080                 return;
2081         /* initialize or tear down tunnel QPs for the master */
2082         for (i = 0; i < dev->dev->caps.num_ports; i++)
2083                 mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init);
2084         return;
2085 }
2086
2087 int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev)
2088 {
2089         int i = 0;
2090         int err;
2091
2092         if (!mlx4_is_mfunc(dev->dev))
2093                 return 0;
2094
2095         dev->sriov.is_going_down = 0;
2096         spin_lock_init(&dev->sriov.going_down_lock);
2097         mlx4_ib_cm_paravirt_init(dev);
2098
2099         mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n");
2100
2101         if (mlx4_is_slave(dev->dev)) {
2102                 mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n");
2103                 return 0;
2104         }
2105
2106         for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2107                 if (i == mlx4_master_func_num(dev->dev))
2108                         mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid);
2109                 else
2110                         mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid());
2111         }
2112
2113         err = mlx4_ib_init_alias_guid_service(dev);
2114         if (err) {
2115                 mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n");
2116                 goto paravirt_err;
2117         }
2118         err = mlx4_ib_device_register_sysfs(dev);
2119         if (err) {
2120                 mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n");
2121                 goto sysfs_err;
2122         }
2123
2124         mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n",
2125                      dev->dev->caps.sqp_demux);
2126         for (i = 0; i < dev->num_ports; i++) {
2127                 union ib_gid gid;
2128                 err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1);
2129                 if (err)
2130                         goto demux_err;
2131                 dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id;
2132                 err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1,
2133                                       &dev->sriov.sqps[i]);
2134                 if (err)
2135                         goto demux_err;
2136                 err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1);
2137                 if (err)
2138                         goto free_pv;
2139         }
2140         mlx4_ib_master_tunnels(dev, 1);
2141         return 0;
2142
2143 free_pv:
2144         free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2145 demux_err:
2146         while (--i >= 0) {
2147                 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2148                 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2149         }
2150         mlx4_ib_device_unregister_sysfs(dev);
2151
2152 sysfs_err:
2153         mlx4_ib_destroy_alias_guid_service(dev);
2154
2155 paravirt_err:
2156         mlx4_ib_cm_paravirt_clean(dev, -1);
2157
2158         return err;
2159 }
2160
2161 void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev)
2162 {
2163         int i;
2164         unsigned long flags;
2165
2166         if (!mlx4_is_mfunc(dev->dev))
2167                 return;
2168
2169         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
2170         dev->sriov.is_going_down = 1;
2171         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
2172         if (mlx4_is_master(dev->dev)) {
2173                 for (i = 0; i < dev->num_ports; i++) {
2174                         flush_workqueue(dev->sriov.demux[i].ud_wq);
2175                         mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]);
2176                         kfree(dev->sriov.sqps[i]);
2177                         dev->sriov.sqps[i] = NULL;
2178                         mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2179                 }
2180
2181                 mlx4_ib_cm_paravirt_clean(dev, -1);
2182                 mlx4_ib_destroy_alias_guid_service(dev);
2183                 mlx4_ib_device_unregister_sysfs(dev);
2184         }
2185 }