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 <linux/mlx4/driver.h>
  44 #include "mlx4_ib.h"
  45
  46 enum {
  47         MLX4_IB_VENDOR_CLASS1 = 0x9,
  48         MLX4_IB_VENDOR_CLASS2 = 0xa
  49 };
  50
  51 #define MLX4_TUN_SEND_WRID_SHIFT 34
  52 #define MLX4_TUN_QPN_SHIFT 32
  53 #define MLX4_TUN_WRID_RECV (((u64) 1) << MLX4_TUN_SEND_WRID_SHIFT)
  54 #define MLX4_TUN_SET_WRID_QPN(a) (((u64) ((a) & 0x3)) << MLX4_TUN_QPN_SHIFT)
  55
  56 #define MLX4_TUN_IS_RECV(a)  (((a) >>  MLX4_TUN_SEND_WRID_SHIFT) & 0x1)
  57 #define MLX4_TUN_WRID_QPN(a) (((a) >> MLX4_TUN_QPN_SHIFT) & 0x3)
  58
  59  /* Port mgmt change event handling */
  60
  61 #define GET_BLK_PTR_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.block_ptr)
  62 #define GET_MASK_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.tbl_entries_mask)
  63 #define NUM_IDX_IN_PKEY_TBL_BLK 32
  64 #define GUID_TBL_ENTRY_SIZE 8      /* size in bytes */
  65 #define GUID_TBL_BLK_NUM_ENTRIES 8
  66 #define GUID_TBL_BLK_SIZE (GUID_TBL_ENTRY_SIZE * GUID_TBL_BLK_NUM_ENTRIES)
  67
  68 struct mlx4_mad_rcv_buf {
  69         struct ib_grh grh;
  70         u8 payload[256];
  71 } __packed;
  72
  73 struct mlx4_mad_snd_buf {
  74         u8 payload[256];
  75 } __packed;
  76
  77 struct mlx4_tunnel_mad {
  78         struct ib_grh grh;
  79         struct mlx4_ib_tunnel_header hdr;
  80         struct ib_mad mad;
  81 } __packed;
  82
  83 struct mlx4_rcv_tunnel_mad {
  84         struct mlx4_rcv_tunnel_hdr hdr;
  85         struct ib_grh grh;
  86         struct ib_mad mad;
  87 } __packed;
  88
  89 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num);
  90 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num);
  91 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
  92                                 int block, u32 change_bitmap);
  93
  94 __be64 mlx4_ib_gen_node_guid(void)
  95 {
  96 #define NODE_GUID_HI    ((u64) (((u64)IB_OPENIB_OUI) << 40))
  97         return cpu_to_be64(NODE_GUID_HI | prandom_u32());
  98 }
  99
 100 __be64 mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx *ctx)
 101 {
 102         return cpu_to_be64(atomic_inc_return(&ctx->tid)) |
 103                 cpu_to_be64(0xff00000000000000LL);
 104 }
 105
 106 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags,
 107                  int port, const struct ib_wc *in_wc,
 108                  const struct ib_grh *in_grh,
 109                  const void *in_mad, void *response_mad)
 110 {
 111         struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
 112         void *inbox;
 113         int err;
 114         u32 in_modifier = port;
 115         u8 op_modifier = 0;
 116
 117         inmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 118         if (IS_ERR(inmailbox))
 119                 return PTR_ERR(inmailbox);
 120         inbox = inmailbox->buf;
 121
 122         outmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 123         if (IS_ERR(outmailbox)) {
 124                 mlx4_free_cmd_mailbox(dev->dev, inmailbox);
 125                 return PTR_ERR(outmailbox);
 126         }
 127
 128         memcpy(inbox, in_mad, 256);
 129
 130         /*
 131          * Key check traps can't be generated unless we have in_wc to
 132          * tell us where to send the trap.
 133          */
 134         if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_MKEY) || !in_wc)
 135                 op_modifier |= 0x1;
 136         if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_BKEY) || !in_wc)
 137                 op_modifier |= 0x2;
 138         if (mlx4_is_mfunc(dev->dev) &&
 139             (mad_ifc_flags & MLX4_MAD_IFC_NET_VIEW || in_wc))
 140                 op_modifier |= 0x8;
 141
 142         if (in_wc) {
 143                 struct {
 144                         __be32          my_qpn;
 145                         u32             reserved1;
 146                         __be32          rqpn;
 147                         u8              sl;
 148                         u8              g_path;
 149                         u16             reserved2[2];
 150                         __be16          pkey;
 151                         u32             reserved3[11];
 152                         u8              grh[40];
 153                 } *ext_info;
 154
 155                 memset(inbox + 256, 0, 256);
 156                 ext_info = inbox + 256;
 157
 158                 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num);
 159                 ext_info->rqpn   = cpu_to_be32(in_wc->src_qp);
 160                 ext_info->sl     = in_wc->sl << 4;
 161                 ext_info->g_path = in_wc->dlid_path_bits |
 162                         (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
 163                 ext_info->pkey   = cpu_to_be16(in_wc->pkey_index);
 164
 165                 if (in_grh)
 166                         memcpy(ext_info->grh, in_grh, 40);
 167
 168                 op_modifier |= 0x4;
 169
 170                 in_modifier |= in_wc->slid << 16;
 171         }
 172
 173         err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier,
 174                            mlx4_is_master(dev->dev) ? (op_modifier & ~0x8) : op_modifier,
 175                            MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
 176                            (op_modifier & 0x8) ? MLX4_CMD_NATIVE : MLX4_CMD_WRAPPED);
 177
 178         if (!err)
 179                 memcpy(response_mad, outmailbox->buf, 256);
 180
 181         mlx4_free_cmd_mailbox(dev->dev, inmailbox);
 182         mlx4_free_cmd_mailbox(dev->dev, outmailbox);
 183
 184         return err;
 185 }
 186
 187 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl)
 188 {
 189         struct ib_ah *new_ah;
 190         struct ib_ah_attr ah_attr;
 191         unsigned long flags;
 192
 193         if (!dev->send_agent[port_num - 1][0])
 194                 return;
 195
 196         memset(&ah_attr, 0, sizeof ah_attr);
 197         ah_attr.dlid     = lid;
 198         ah_attr.sl       = sl;
 199         ah_attr.port_num = port_num;
 200
 201         new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
 202                               &ah_attr);
 203         if (IS_ERR(new_ah))
 204                 return;
 205
 206         spin_lock_irqsave(&dev->sm_lock, flags);
 207         if (dev->sm_ah[port_num - 1])
 208                 ib_destroy_ah(dev->sm_ah[port_num - 1]);
 209         dev->sm_ah[port_num - 1] = new_ah;
 210         spin_unlock_irqrestore(&dev->sm_lock, flags);
 211 }
 212
 213 /*
 214  * Snoop SM MADs for port info, GUID info, and  P_Key table sets, so we can
 215  * synthesize LID change, Client-Rereg, GID change, and P_Key change events.
 216  */
 217 static void smp_snoop(struct ib_device *ibdev, u8 port_num, const struct ib_mad *mad,
 218                       u16 prev_lid)
 219 {
 220         struct ib_port_info *pinfo;
 221         u16 lid;
 222         __be16 *base;
 223         u32 bn, pkey_change_bitmap;
 224         int i;
 225
 226
 227         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 228         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 229              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 230             mad->mad_hdr.method == IB_MGMT_METHOD_SET)
 231                 switch (mad->mad_hdr.attr_id) {
 232                 case IB_SMP_ATTR_PORT_INFO:
 233                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
 234                                 return;
 235                         pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data;
 236                         lid = be16_to_cpu(pinfo->lid);
 237
 238                         update_sm_ah(dev, port_num,
 239                                      be16_to_cpu(pinfo->sm_lid),
 240                                      pinfo->neighbormtu_mastersmsl & 0xf);
 241
 242                         if (pinfo->clientrereg_resv_subnetto & 0x80)
 243                                 handle_client_rereg_event(dev, port_num);
 244
 245                         if (prev_lid != lid)
 246                                 handle_lid_change_event(dev, port_num);
 247                         break;
 248
 249                 case IB_SMP_ATTR_PKEY_TABLE:
 250                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
 251                                 return;
 252                         if (!mlx4_is_mfunc(dev->dev)) {
 253                                 mlx4_ib_dispatch_event(dev, port_num,
 254                                                        IB_EVENT_PKEY_CHANGE);
 255                                 break;
 256                         }
 257
 258                         /* at this point, we are running in the master.
 259                          * Slaves do not receive SMPs.
 260                          */
 261                         bn  = be32_to_cpu(((struct ib_smp *)mad)->attr_mod) & 0xFFFF;
 262                         base = (__be16 *) &(((struct ib_smp *)mad)->data[0]);
 263                         pkey_change_bitmap = 0;
 264                         for (i = 0; i < 32; i++) {
 265                                 pr_debug("PKEY[%d] = x%x\n",
 266                                          i + bn*32, be16_to_cpu(base[i]));
 267                                 if (be16_to_cpu(base[i]) !=
 268                                     dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32]) {
 269                                         pkey_change_bitmap |= (1 << i);
 270                                         dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32] =
 271                                                 be16_to_cpu(base[i]);
 272                                 }
 273                         }
 274                         pr_debug("PKEY Change event: port=%d, "
 275                                  "block=0x%x, change_bitmap=0x%x\n",
 276                                  port_num, bn, pkey_change_bitmap);
 277
 278                         if (pkey_change_bitmap) {
 279                                 mlx4_ib_dispatch_event(dev, port_num,
 280                                                        IB_EVENT_PKEY_CHANGE);
 281                                 if (!dev->sriov.is_going_down)
 282                                         __propagate_pkey_ev(dev, port_num, bn,
 283                                                             pkey_change_bitmap);
 284                         }
 285                         break;
 286
 287                 case IB_SMP_ATTR_GUID_INFO:
 288                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
 289                                 return;
 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                 case IB_SMP_ATTR_SL_TO_VL_TABLE:
 306                         /* cache sl to vl mapping changes for use in
 307                          * filling QP1 LRH VL field when sending packets
 308                          */
 309                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV &&
 310                             dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)
 311                                 return;
 312                         if (!mlx4_is_slave(dev->dev)) {
 313                                 union sl2vl_tbl_to_u64 sl2vl64;
 314                                 int jj;
 315
 316                                 for (jj = 0; jj < 8; jj++) {
 317                                         sl2vl64.sl8[jj] = ((struct ib_smp *)mad)->data[jj];
 318                                         pr_debug("port %u, sl2vl[%d] = %02x\n",
 319                                                  port_num, jj, sl2vl64.sl8[jj]);
 320                                 }
 321                                 atomic64_set(&dev->sl2vl[port_num - 1], sl2vl64.sl64);
 322                         }
 323                         break;
 324
 325                 default:
 326                         break;
 327                 }
 328 }
 329
 330 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
 331                                 int block, u32 change_bitmap)
 332 {
 333         int i, ix, slave, err;
 334         int have_event = 0;
 335
 336         for (slave = 0; slave < dev->dev->caps.sqp_demux; slave++) {
 337                 if (slave == mlx4_master_func_num(dev->dev))
 338                         continue;
 339                 if (!mlx4_is_slave_active(dev->dev, slave))
 340                         continue;
 341
 342                 have_event = 0;
 343                 for (i = 0; i < 32; i++) {
 344                         if (!(change_bitmap & (1 << i)))
 345                                 continue;
 346                         for (ix = 0;
 347                              ix < dev->dev->caps.pkey_table_len[port_num]; ix++) {
 348                                 if (dev->pkeys.virt2phys_pkey[slave][port_num - 1]
 349                                     [ix] == i + 32 * block) {
 350                                         err = mlx4_gen_pkey_eqe(dev->dev, slave, port_num);
 351                                         pr_debug("propagate_pkey_ev: slave %d,"
 352                                                  " port %d, ix %d (%d)\n",
 353                                                  slave, port_num, ix, err);
 354                                         have_event = 1;
 355                                         break;
 356                                 }
 357                         }
 358                         if (have_event)
 359                                 break;
 360                 }
 361         }
 362 }
 363
 364 static void node_desc_override(struct ib_device *dev,
 365                                struct ib_mad *mad)
 366 {
 367         unsigned long flags;
 368
 369         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 370              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 371             mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
 372             mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
 373                 spin_lock_irqsave(&to_mdev(dev)->sm_lock, flags);
 374                 memcpy(((struct ib_smp *) mad)->data, dev->node_desc,
 375                        IB_DEVICE_NODE_DESC_MAX);
 376                 spin_unlock_irqrestore(&to_mdev(dev)->sm_lock, flags);
 377         }
 378 }
 379
 380 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, const struct ib_mad *mad)
 381 {
 382         int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
 383         struct ib_mad_send_buf *send_buf;
 384         struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
 385         int ret;
 386         unsigned long flags;
 387
 388         if (agent) {
 389                 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
 390                                               IB_MGMT_MAD_DATA, GFP_ATOMIC,
 391                                               IB_MGMT_BASE_VERSION);
 392                 if (IS_ERR(send_buf))
 393                         return;
 394                 /*
 395                  * We rely here on the fact that MLX QPs don't use the
 396                  * address handle after the send is posted (this is
 397                  * wrong following the IB spec strictly, but we know
 398                  * it's OK for our devices).
 399                  */
 400                 spin_lock_irqsave(&dev->sm_lock, flags);
 401                 memcpy(send_buf->mad, mad, sizeof *mad);
 402                 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
 403                         ret = ib_post_send_mad(send_buf, NULL);
 404                 else
 405                         ret = -EINVAL;
 406                 spin_unlock_irqrestore(&dev->sm_lock, flags);
 407
 408                 if (ret)
 409                         ib_free_send_mad(send_buf);
 410         }
 411 }
 412
 413 static int mlx4_ib_demux_sa_handler(struct ib_device *ibdev, int port, int slave,
 414                                                              struct ib_sa_mad *sa_mad)
 415 {
 416         int ret = 0;
 417
 418         /* dispatch to different sa handlers */
 419         switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
 420         case IB_SA_ATTR_MC_MEMBER_REC:
 421                 ret = mlx4_ib_mcg_demux_handler(ibdev, port, slave, sa_mad);
 422                 break;
 423         default:
 424                 break;
 425         }
 426         return ret;
 427 }
 428
 429 int mlx4_ib_find_real_gid(struct ib_device *ibdev, u8 port, __be64 guid)
 430 {
 431         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 432         int i;
 433
 434         for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
 435                 if (dev->sriov.demux[port - 1].guid_cache[i] == guid)
 436                         return i;
 437         }
 438         return -1;
 439 }
 440
 441
 442 static int find_slave_port_pkey_ix(struct mlx4_ib_dev *dev, int slave,
 443                                    u8 port, u16 pkey, u16 *ix)
 444 {
 445         int i, ret;
 446         u8 unassigned_pkey_ix, pkey_ix, partial_ix = 0xFF;
 447         u16 slot_pkey;
 448
 449         if (slave == mlx4_master_func_num(dev->dev))
 450                 return ib_find_cached_pkey(&dev->ib_dev, port, pkey, ix);
 451
 452         unassigned_pkey_ix = dev->dev->phys_caps.pkey_phys_table_len[port] - 1;
 453
 454         for (i = 0; i < dev->dev->caps.pkey_table_len[port]; i++) {
 455                 if (dev->pkeys.virt2phys_pkey[slave][port - 1][i] == unassigned_pkey_ix)
 456                         continue;
 457
 458                 pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][i];
 459
 460                 ret = ib_get_cached_pkey(&dev->ib_dev, port, pkey_ix, &slot_pkey);
 461                 if (ret)
 462                         continue;
 463                 if ((slot_pkey & 0x7FFF) == (pkey & 0x7FFF)) {
 464                         if (slot_pkey & 0x8000) {
 465                                 *ix = (u16) pkey_ix;
 466                                 return 0;
 467                         } else {
 468                                 /* take first partial pkey index found */
 469                                 if (partial_ix == 0xFF)
 470                                         partial_ix = pkey_ix;
 471                         }
 472                 }
 473         }
 474
 475         if (partial_ix < 0xFF) {
 476                 *ix = (u16) partial_ix;
 477                 return 0;
 478         }
 479
 480         return -EINVAL;
 481 }
 482
 483 int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
 484                           enum ib_qp_type dest_qpt, struct ib_wc *wc,
 485                           struct ib_grh *grh, struct ib_mad *mad)
 486 {
 487         struct ib_sge list;
 488         struct ib_ud_wr wr;
 489         struct ib_send_wr *bad_wr;
 490         struct mlx4_ib_demux_pv_ctx *tun_ctx;
 491         struct mlx4_ib_demux_pv_qp *tun_qp;
 492         struct mlx4_rcv_tunnel_mad *tun_mad;
 493         struct ib_ah_attr attr;
 494         struct ib_ah *ah;
 495         struct ib_qp *src_qp = NULL;
 496         unsigned tun_tx_ix = 0;
 497         int dqpn;
 498         int ret = 0;
 499         u16 tun_pkey_ix;
 500         u16 cached_pkey;
 501         u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
 502
 503         if (dest_qpt > IB_QPT_GSI)
 504                 return -EINVAL;
 505
 506         tun_ctx = dev->sriov.demux[port-1].tun[slave];
 507
 508         /* check if proxy qp created */
 509         if (!tun_ctx || tun_ctx->state != DEMUX_PV_STATE_ACTIVE)
 510                 return -EAGAIN;
 511
 512         if (!dest_qpt)
 513                 tun_qp = &tun_ctx->qp[0];
 514         else
 515                 tun_qp = &tun_ctx->qp[1];
 516
 517         /* compute P_Key index to put in tunnel header for slave */
 518         if (dest_qpt) {
 519                 u16 pkey_ix;
 520                 ret = ib_get_cached_pkey(&dev->ib_dev, port, wc->pkey_index, &cached_pkey);
 521                 if (ret)
 522                         return -EINVAL;
 523
 524                 ret = find_slave_port_pkey_ix(dev, slave, port, cached_pkey, &pkey_ix);
 525                 if (ret)
 526                         return -EINVAL;
 527                 tun_pkey_ix = pkey_ix;
 528         } else
 529                 tun_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
 530
 531         dqpn = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave + port + (dest_qpt * 2) - 1;
 532
 533         /* get tunnel tx data buf for slave */
 534         src_qp = tun_qp->qp;
 535
 536         /* create ah. Just need an empty one with the port num for the post send.
 537          * The driver will set the force loopback bit in post_send */
 538         memset(&attr, 0, sizeof attr);
 539         attr.port_num = port;
 540         if (is_eth) {
 541                 memcpy(&attr.grh.dgid.raw[0], &grh->dgid.raw[0], 16);
 542                 attr.ah_flags = IB_AH_GRH;
 543         }
 544         ah = ib_create_ah(tun_ctx->pd, &attr);
 545         if (IS_ERR(ah))
 546                 return -ENOMEM;
 547
 548         /* allocate tunnel tx buf after pass failure returns */
 549         spin_lock(&tun_qp->tx_lock);
 550         if (tun_qp->tx_ix_head - tun_qp->tx_ix_tail >=
 551             (MLX4_NUM_TUNNEL_BUFS - 1))
 552                 ret = -EAGAIN;
 553         else
 554                 tun_tx_ix = (++tun_qp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
 555         spin_unlock(&tun_qp->tx_lock);
 556         if (ret)
 557                 goto end;
 558
 559         tun_mad = (struct mlx4_rcv_tunnel_mad *) (tun_qp->tx_ring[tun_tx_ix].buf.addr);
 560         if (tun_qp->tx_ring[tun_tx_ix].ah)
 561                 ib_destroy_ah(tun_qp->tx_ring[tun_tx_ix].ah);
 562         tun_qp->tx_ring[tun_tx_ix].ah = ah;
 563         ib_dma_sync_single_for_cpu(&dev->ib_dev,
 564                                    tun_qp->tx_ring[tun_tx_ix].buf.map,
 565                                    sizeof (struct mlx4_rcv_tunnel_mad),
 566                                    DMA_TO_DEVICE);
 567
 568         /* copy over to tunnel buffer */
 569         if (grh)
 570                 memcpy(&tun_mad->grh, grh, sizeof *grh);
 571         memcpy(&tun_mad->mad, mad, sizeof *mad);
 572
 573         /* adjust tunnel data */
 574         tun_mad->hdr.pkey_index = cpu_to_be16(tun_pkey_ix);
 575         tun_mad->hdr.flags_src_qp = cpu_to_be32(wc->src_qp & 0xFFFFFF);
 576         tun_mad->hdr.g_ml_path = (grh && (wc->wc_flags & IB_WC_GRH)) ? 0x80 : 0;
 577
 578         if (is_eth) {
 579                 u16 vlan = 0;
 580                 if (mlx4_get_slave_default_vlan(dev->dev, port, slave, &vlan,
 581                                                 NULL)) {
 582                         /* VST mode */
 583                         if (vlan != wc->vlan_id)
 584                                 /* Packet vlan is not the VST-assigned vlan.
 585                                  * Drop the packet.
 586                                  */
 587                                 goto out;
 588                          else
 589                                 /* Remove the vlan tag before forwarding
 590                                  * the packet to the VF.
 591                                  */
 592                                 vlan = 0xffff;
 593                 } else {
 594                         vlan = wc->vlan_id;
 595                 }
 596
 597                 tun_mad->hdr.sl_vid = cpu_to_be16(vlan);
 598                 memcpy((char *)&tun_mad->hdr.mac_31_0, &(wc->smac[0]), 4);
 599                 memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2);
 600         } else {
 601                 tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12);
 602                 tun_mad->hdr.slid_mac_47_32 = cpu_to_be16(wc->slid);
 603         }
 604
 605         ib_dma_sync_single_for_device(&dev->ib_dev,
 606                                       tun_qp->tx_ring[tun_tx_ix].buf.map,
 607                                       sizeof (struct mlx4_rcv_tunnel_mad),
 608                                       DMA_TO_DEVICE);
 609
 610         list.addr = tun_qp->tx_ring[tun_tx_ix].buf.map;
 611         list.length = sizeof (struct mlx4_rcv_tunnel_mad);
 612         list.lkey = tun_ctx->pd->local_dma_lkey;
 613
 614         wr.ah = ah;
 615         wr.port_num = port;
 616         wr.remote_qkey = IB_QP_SET_QKEY;
 617         wr.remote_qpn = dqpn;
 618         wr.wr.next = NULL;
 619         wr.wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt);
 620         wr.wr.sg_list = &list;
 621         wr.wr.num_sge = 1;
 622         wr.wr.opcode = IB_WR_SEND;
 623         wr.wr.send_flags = IB_SEND_SIGNALED;
 624
 625         ret = ib_post_send(src_qp, &wr.wr, &bad_wr);
 626         if (!ret)
 627                 return 0;
 628  out:
 629         spin_lock(&tun_qp->tx_lock);
 630         tun_qp->tx_ix_tail++;
 631         spin_unlock(&tun_qp->tx_lock);
 632         tun_qp->tx_ring[tun_tx_ix].ah = NULL;
 633 end:
 634         ib_destroy_ah(ah);
 635         return ret;
 636 }
 637
 638 static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port,
 639                         struct ib_wc *wc, struct ib_grh *grh,
 640                         struct ib_mad *mad)
 641 {
 642         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 643         int err, other_port;
 644         int slave = -1;
 645         u8 *slave_id;
 646         int is_eth = 0;
 647
 648         if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
 649                 is_eth = 0;
 650         else
 651                 is_eth = 1;
 652
 653         if (is_eth) {
 654                 if (!(wc->wc_flags & IB_WC_GRH)) {
 655                         mlx4_ib_warn(ibdev, "RoCE grh not present.\n");
 656                         return -EINVAL;
 657                 }
 658                 if (mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_CM) {
 659                         mlx4_ib_warn(ibdev, "RoCE mgmt class is not CM\n");
 660                         return -EINVAL;
 661                 }
 662                 err = mlx4_get_slave_from_roce_gid(dev->dev, port, grh->dgid.raw, &slave);
 663                 if (err && mlx4_is_mf_bonded(dev->dev)) {
 664                         other_port = (port == 1) ? 2 : 1;
 665                         err = mlx4_get_slave_from_roce_gid(dev->dev, other_port, grh->dgid.raw, &slave);
 666                         if (!err) {
 667                                 port = other_port;
 668                                 pr_debug("resolved slave %d from gid %pI6 wire port %d other %d\n",
 669                                          slave, grh->dgid.raw, port, other_port);
 670                         }
 671                 }
 672                 if (err) {
 673                         mlx4_ib_warn(ibdev, "failed matching grh\n");
 674                         return -ENOENT;
 675                 }
 676                 if (slave >= dev->dev->caps.sqp_demux) {
 677                         mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 678                                      slave, dev->dev->caps.sqp_demux);
 679                         return -ENOENT;
 680                 }
 681
 682                 if (mlx4_ib_demux_cm_handler(ibdev, port, NULL, mad))
 683                         return 0;
 684
 685                 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 686                 if (err)
 687                         pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
 688                                  slave, err);
 689                 return 0;
 690         }
 691
 692         /* Initially assume that this mad is for us */
 693         slave = mlx4_master_func_num(dev->dev);
 694
 695         /* See if the slave id is encoded in a response mad */
 696         if (mad->mad_hdr.method & 0x80) {
 697                 slave_id = (u8 *) &mad->mad_hdr.tid;
 698                 slave = *slave_id;
 699                 if (slave != 255) /*255 indicates the dom0*/
 700                         *slave_id = 0; /* remap tid */
 701         }
 702
 703         /* If a grh is present, we demux according to it */
 704         if (wc->wc_flags & IB_WC_GRH) {
 705                 slave = mlx4_ib_find_real_gid(ibdev, port, grh->dgid.global.interface_id);
 706                 if (slave < 0) {
 707                         mlx4_ib_warn(ibdev, "failed matching grh\n");
 708                         return -ENOENT;
 709                 }
 710         }
 711         /* Class-specific handling */
 712         switch (mad->mad_hdr.mgmt_class) {
 713         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
 714         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
 715                 /* 255 indicates the dom0 */
 716                 if (slave != 255 && slave != mlx4_master_func_num(dev->dev)) {
 717                         if (!mlx4_vf_smi_enabled(dev->dev, slave, port))
 718                                 return -EPERM;
 719                         /* for a VF. drop unsolicited MADs */
 720                         if (!(mad->mad_hdr.method & IB_MGMT_METHOD_RESP)) {
 721                                 mlx4_ib_warn(ibdev, "demux QP0. rejecting unsolicited mad for slave %d class 0x%x, method 0x%x\n",
 722                                              slave, mad->mad_hdr.mgmt_class,
 723                                              mad->mad_hdr.method);
 724                                 return -EINVAL;
 725                         }
 726                 }
 727                 break;
 728         case IB_MGMT_CLASS_SUBN_ADM:
 729                 if (mlx4_ib_demux_sa_handler(ibdev, port, slave,
 730                                              (struct ib_sa_mad *) mad))
 731                         return 0;
 732                 break;
 733         case IB_MGMT_CLASS_CM:
 734                 if (mlx4_ib_demux_cm_handler(ibdev, port, &slave, mad))
 735                         return 0;
 736                 break;
 737         case IB_MGMT_CLASS_DEVICE_MGMT:
 738                 if (mad->mad_hdr.method != IB_MGMT_METHOD_GET_RESP)
 739                         return 0;
 740                 break;
 741         default:
 742                 /* Drop unsupported classes for slaves in tunnel mode */
 743                 if (slave != mlx4_master_func_num(dev->dev)) {
 744                         pr_debug("dropping unsupported ingress mad from class:%d "
 745                                  "for slave:%d\n", mad->mad_hdr.mgmt_class, slave);
 746                         return 0;
 747                 }
 748         }
 749         /*make sure that no slave==255 was not handled yet.*/
 750         if (slave >= dev->dev->caps.sqp_demux) {
 751                 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 752                              slave, dev->dev->caps.sqp_demux);
 753                 return -ENOENT;
 754         }
 755
 756         err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 757         if (err)
 758                 pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
 759                          slave, err);
 760         return 0;
 761 }
 762
 763 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 764                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 765                         const struct ib_mad *in_mad, struct ib_mad *out_mad)
 766 {
 767         u16 slid, prev_lid = 0;
 768         int err;
 769         struct ib_port_attr pattr;
 770
 771         if (in_wc && in_wc->qp->qp_num) {
 772                 pr_debug("received MAD: slid:%d sqpn:%d "
 773                         "dlid_bits:%d dqpn:%d wc_flags:0x%x, cls %x, mtd %x, atr %x\n",
 774                         in_wc->slid, in_wc->src_qp,
 775                         in_wc->dlid_path_bits,
 776                         in_wc->qp->qp_num,
 777                         in_wc->wc_flags,
 778                         in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method,
 779                         be16_to_cpu(in_mad->mad_hdr.attr_id));
 780                 if (in_wc->wc_flags & IB_WC_GRH) {
 781                         pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n",
 782                                  be64_to_cpu(in_grh->sgid.global.subnet_prefix),
 783                                  be64_to_cpu(in_grh->sgid.global.interface_id));
 784                         pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n",
 785                                  be64_to_cpu(in_grh->dgid.global.subnet_prefix),
 786                                  be64_to_cpu(in_grh->dgid.global.interface_id));
 787                 }
 788         }
 789
 790         slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
 791
 792         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
 793                 forward_trap(to_mdev(ibdev), port_num, in_mad);
 794                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 795         }
 796
 797         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 798             in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
 799                 if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
 800                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
 801                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
 802                         return IB_MAD_RESULT_SUCCESS;
 803
 804                 /*
 805                  * Don't process SMInfo queries -- the SMA can't handle them.
 806                  */
 807                 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
 808                         return IB_MAD_RESULT_SUCCESS;
 809         } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
 810                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1   ||
 811                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2   ||
 812                    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
 813                 if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
 814                     in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
 815                         return IB_MAD_RESULT_SUCCESS;
 816         } else
 817                 return IB_MAD_RESULT_SUCCESS;
 818
 819         if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 820              in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 821             in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
 822             in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
 823             !ib_query_port(ibdev, port_num, &pattr))
 824                 prev_lid = pattr.lid;
 825
 826         err = mlx4_MAD_IFC(to_mdev(ibdev),
 827                            (mad_flags & IB_MAD_IGNORE_MKEY ? MLX4_MAD_IFC_IGNORE_MKEY : 0) |
 828                            (mad_flags & IB_MAD_IGNORE_BKEY ? MLX4_MAD_IFC_IGNORE_BKEY : 0) |
 829                            MLX4_MAD_IFC_NET_VIEW,
 830                            port_num, in_wc, in_grh, in_mad, out_mad);
 831         if (err)
 832                 return IB_MAD_RESULT_FAILURE;
 833
 834         if (!out_mad->mad_hdr.status) {
 835                 smp_snoop(ibdev, port_num, in_mad, prev_lid);
 836                 /* slaves get node desc from FW */
 837                 if (!mlx4_is_slave(to_mdev(ibdev)->dev))
 838                         node_desc_override(ibdev, out_mad);
 839         }
 840
 841         /* set return bit in status of directed route responses */
 842         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
 843                 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
 844
 845         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
 846                 /* no response for trap repress */
 847                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 848
 849         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 850 }
 851
 852 static void edit_counter(struct mlx4_counter *cnt, void *counters,
 853                          __be16 attr_id)
 854 {
 855         switch (attr_id) {
 856         case IB_PMA_PORT_COUNTERS:
 857         {
 858                 struct ib_pma_portcounters *pma_cnt =
 859                         (struct ib_pma_portcounters *)counters;
 860
 861                 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_data,
 862                                      (be64_to_cpu(cnt->tx_bytes) >> 2));
 863                 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_data,
 864                                      (be64_to_cpu(cnt->rx_bytes) >> 2));
 865                 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_packets,
 866                                      be64_to_cpu(cnt->tx_frames));
 867                 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_packets,
 868                                      be64_to_cpu(cnt->rx_frames));
 869                 break;
 870         }
 871         case IB_PMA_PORT_COUNTERS_EXT:
 872         {
 873                 struct ib_pma_portcounters_ext *pma_cnt_ext =
 874                         (struct ib_pma_portcounters_ext *)counters;
 875
 876                 pma_cnt_ext->port_xmit_data =
 877                         cpu_to_be64(be64_to_cpu(cnt->tx_bytes) >> 2);
 878                 pma_cnt_ext->port_rcv_data =
 879                         cpu_to_be64(be64_to_cpu(cnt->rx_bytes) >> 2);
 880                 pma_cnt_ext->port_xmit_packets = cnt->tx_frames;
 881                 pma_cnt_ext->port_rcv_packets = cnt->rx_frames;
 882                 break;
 883         }
 884         }
 885 }
 886
 887 static int iboe_process_mad_port_info(void *out_mad)
 888 {
 889         struct ib_class_port_info cpi = {};
 890
 891         cpi.capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
 892         memcpy(out_mad, &cpi, sizeof(cpi));
 893         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 894 }
 895
 896 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 897                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 898                         const struct ib_mad *in_mad, struct ib_mad *out_mad)
 899 {
 900         struct mlx4_counter counter_stats;
 901         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 902         struct counter_index *tmp_counter;
 903         int err = IB_MAD_RESULT_FAILURE, stats_avail = 0;
 904
 905         if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
 906                 return -EINVAL;
 907
 908         if (in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO)
 909                 return iboe_process_mad_port_info((void *)(out_mad->data + 40));
 910
 911         memset(&counter_stats, 0, sizeof(counter_stats));
 912         mutex_lock(&dev->counters_table[port_num - 1].mutex);
 913         list_for_each_entry(tmp_counter,
 914                             &dev->counters_table[port_num - 1].counters_list,
 915                             list) {
 916                 err = mlx4_get_counter_stats(dev->dev,
 917                                              tmp_counter->index,
 918                                              &counter_stats, 0);
 919                 if (err) {
 920                         err = IB_MAD_RESULT_FAILURE;
 921                         stats_avail = 0;
 922                         break;
 923                 }
 924                 stats_avail = 1;
 925         }
 926         mutex_unlock(&dev->counters_table[port_num - 1].mutex);
 927         if (stats_avail) {
 928                 memset(out_mad->data, 0, sizeof out_mad->data);
 929                 switch (counter_stats.counter_mode & 0xf) {
 930                 case 0:
 931                         edit_counter(&counter_stats,
 932                                      (void *)(out_mad->data + 40),
 933                                      in_mad->mad_hdr.attr_id);
 934                         err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 935                         break;
 936                 default:
 937                         err = IB_MAD_RESULT_FAILURE;
 938                 }
 939         }
 940
 941         return err;
 942 }
 943
 944 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 945                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 946                         const struct ib_mad_hdr *in, size_t in_mad_size,
 947                         struct ib_mad_hdr *out, size_t *out_mad_size,
 948                         u16 *out_mad_pkey_index)
 949 {
 950         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 951         const struct ib_mad *in_mad = (const struct ib_mad *)in;
 952         struct ib_mad *out_mad = (struct ib_mad *)out;
 953         enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num);
 954
 955         if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
 956                          *out_mad_size != sizeof(*out_mad)))
 957                 return IB_MAD_RESULT_FAILURE;
 958
 959         /* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA
 960          * queries, should be called only by VFs and for that specific purpose
 961          */
 962         if (link == IB_LINK_LAYER_INFINIBAND) {
 963                 if (mlx4_is_slave(dev->dev) &&
 964                     (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT &&
 965                      (in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS ||
 966                       in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT ||
 967                       in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO)))
 968                         return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
 969                                                 in_grh, in_mad, out_mad);
 970
 971                 return ib_process_mad(ibdev, mad_flags, port_num, in_wc,
 972                                       in_grh, in_mad, out_mad);
 973         }
 974
 975         if (link == IB_LINK_LAYER_ETHERNET)
 976                 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
 977                                         in_grh, in_mad, out_mad);
 978
 979         return -EINVAL;
 980 }
 981
 982 static void send_handler(struct ib_mad_agent *agent,
 983                          struct ib_mad_send_wc *mad_send_wc)
 984 {
 985         if (mad_send_wc->send_buf->context[0])
 986                 ib_destroy_ah(mad_send_wc->send_buf->context[0]);
 987         ib_free_send_mad(mad_send_wc->send_buf);
 988 }
 989
 990 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
 991 {
 992         struct ib_mad_agent *agent;
 993         int p, q;
 994         int ret;
 995         enum rdma_link_layer ll;
 996
 997         for (p = 0; p < dev->num_ports; ++p) {
 998                 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1);
 999                 for (q = 0; q <= 1; ++q) {
1000                         if (ll == IB_LINK_LAYER_INFINIBAND) {
1001                                 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
1002                                                               q ? IB_QPT_GSI : IB_QPT_SMI,
1003                                                               NULL, 0, send_handler,
1004                                                               NULL, NULL, 0);
1005                                 if (IS_ERR(agent)) {
1006                                         ret = PTR_ERR(agent);
1007                                         goto err;
1008                                 }
1009                                 dev->send_agent[p][q] = agent;
1010                         } else
1011                                 dev->send_agent[p][q] = NULL;
1012                 }
1013         }
1014
1015         return 0;
1016
1017 err:
1018         for (p = 0; p < dev->num_ports; ++p)
1019                 for (q = 0; q <= 1; ++q)
1020                         if (dev->send_agent[p][q])
1021                                 ib_unregister_mad_agent(dev->send_agent[p][q]);
1022
1023         return ret;
1024 }
1025
1026 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
1027 {
1028         struct ib_mad_agent *agent;
1029         int p, q;
1030
1031         for (p = 0; p < dev->num_ports; ++p) {
1032                 for (q = 0; q <= 1; ++q) {
1033                         agent = dev->send_agent[p][q];
1034                         if (agent) {
1035                                 dev->send_agent[p][q] = NULL;
1036                                 ib_unregister_mad_agent(agent);
1037                         }
1038                 }
1039
1040                 if (dev->sm_ah[p])
1041                         ib_destroy_ah(dev->sm_ah[p]);
1042         }
1043 }
1044
1045 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num)
1046 {
1047         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_LID_CHANGE);
1048
1049         if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
1050                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
1051                                             MLX4_EQ_PORT_INFO_LID_CHANGE_MASK);
1052 }
1053
1054 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num)
1055 {
1056         /* re-configure the alias-guid and mcg's */
1057         if (mlx4_is_master(dev->dev)) {
1058                 mlx4_ib_invalidate_all_guid_record(dev, port_num);
1059
1060                 if (!dev->sriov.is_going_down) {
1061                         mlx4_ib_mcg_port_cleanup(&dev->sriov.demux[port_num - 1], 0);
1062                         mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
1063                                                     MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK);
1064                 }
1065         }
1066
1067         /* Update the sl to vl table from inside client rereg
1068          * only if in secure-host mode (snooping is not possible)
1069          * and the sl-to-vl change event is not generated by FW.
1070          */
1071         if (!mlx4_is_slave(dev->dev) &&
1072             dev->dev->flags & MLX4_FLAG_SECURE_HOST &&
1073             !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)) {
1074                 if (mlx4_is_master(dev->dev))
1075                         /* already in work queue from mlx4_ib_event queueing
1076                          * mlx4_handle_port_mgmt_change_event, which calls
1077                          * this procedure. Therefore, call sl2vl_update directly.
1078                          */
1079                         mlx4_ib_sl2vl_update(dev, port_num);
1080                 else
1081                         mlx4_sched_ib_sl2vl_update_work(dev, port_num);
1082         }
1083         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_CLIENT_REREGISTER);
1084 }
1085
1086 static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
1087                               struct mlx4_eqe *eqe)
1088 {
1089         __propagate_pkey_ev(dev, port_num, GET_BLK_PTR_FROM_EQE(eqe),
1090                             GET_MASK_FROM_EQE(eqe));
1091 }
1092
1093 static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num,
1094                                       u32 guid_tbl_blk_num, u32 change_bitmap)
1095 {
1096         struct ib_smp *in_mad  = NULL;
1097         struct ib_smp *out_mad  = NULL;
1098         u16 i;
1099
1100         if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev))
1101                 return;
1102
1103         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
1104         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1105         if (!in_mad || !out_mad) {
1106                 mlx4_ib_warn(&dev->ib_dev, "failed to allocate memory for guid info mads\n");
1107                 goto out;
1108         }
1109
1110         guid_tbl_blk_num  *= 4;
1111
1112         for (i = 0; i < 4; i++) {
1113                 if (change_bitmap && (!((change_bitmap >> (8 * i)) & 0xff)))
1114                         continue;
1115                 memset(in_mad, 0, sizeof *in_mad);
1116                 memset(out_mad, 0, sizeof *out_mad);
1117
1118                 in_mad->base_version  = 1;
1119                 in_mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
1120                 in_mad->class_version = 1;
1121                 in_mad->method        = IB_MGMT_METHOD_GET;
1122                 in_mad->attr_id       = IB_SMP_ATTR_GUID_INFO;
1123                 in_mad->attr_mod      = cpu_to_be32(guid_tbl_blk_num + i);
1124
1125                 if (mlx4_MAD_IFC(dev,
1126                                  MLX4_MAD_IFC_IGNORE_KEYS | MLX4_MAD_IFC_NET_VIEW,
1127                                  port_num, NULL, NULL, in_mad, out_mad)) {
1128                         mlx4_ib_warn(&dev->ib_dev, "Failed in get GUID INFO MAD_IFC\n");
1129                         goto out;
1130                 }
1131
1132                 mlx4_ib_update_cache_on_guid_change(dev, guid_tbl_blk_num + i,
1133                                                     port_num,
1134                                                     (u8 *)(&((struct ib_smp *)out_mad)->data));
1135                 mlx4_ib_notify_slaves_on_guid_change(dev, guid_tbl_blk_num + i,
1136                                                      port_num,
1137                                                      (u8 *)(&((struct ib_smp *)out_mad)->data));
1138         }
1139
1140 out:
1141         kfree(in_mad);
1142         kfree(out_mad);
1143         return;
1144 }
1145
1146 void handle_port_mgmt_change_event(struct work_struct *work)
1147 {
1148         struct ib_event_work *ew = container_of(work, struct ib_event_work, work);
1149         struct mlx4_ib_dev *dev = ew->ib_dev;
1150         struct mlx4_eqe *eqe = &(ew->ib_eqe);
1151         u8 port = eqe->event.port_mgmt_change.port;
1152         u32 changed_attr;
1153         u32 tbl_block;
1154         u32 change_bitmap;
1155
1156         switch (eqe->subtype) {
1157         case MLX4_DEV_PMC_SUBTYPE_PORT_INFO:
1158                 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr);
1159
1160                 /* Update the SM ah - This should be done before handling
1161                    the other changed attributes so that MADs can be sent to the SM */
1162                 if (changed_attr & MSTR_SM_CHANGE_MASK) {
1163                         u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid);
1164                         u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf;
1165                         update_sm_ah(dev, port, lid, sl);
1166                 }
1167
1168                 /* Check if it is a lid change event */
1169                 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK)
1170                         handle_lid_change_event(dev, port);
1171
1172                 /* Generate GUID changed event */
1173                 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) {
1174                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1175                         /*if master, notify all slaves*/
1176                         if (mlx4_is_master(dev->dev))
1177                                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port,
1178                                                             MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK);
1179                 }
1180
1181                 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK)
1182                         handle_client_rereg_event(dev, port);
1183                 break;
1184
1185         case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE:
1186                 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE);
1187                 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
1188                         propagate_pkey_ev(dev, port, eqe);
1189                 break;
1190         case MLX4_DEV_PMC_SUBTYPE_GUID_INFO:
1191                 /* paravirtualized master's guid is guid 0 -- does not change */
1192                 if (!mlx4_is_master(dev->dev))
1193                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1194                 /*if master, notify relevant slaves*/
1195                 else if (!dev->sriov.is_going_down) {
1196                         tbl_block = GET_BLK_PTR_FROM_EQE(eqe);
1197                         change_bitmap = GET_MASK_FROM_EQE(eqe);
1198                         handle_slaves_guid_change(dev, port, tbl_block, change_bitmap);
1199                 }
1200                 break;
1201
1202         case MLX4_DEV_PMC_SUBTYPE_SL_TO_VL_MAP:
1203                 /* cache sl to vl mapping changes for use in
1204                  * filling QP1 LRH VL field when sending packets
1205                  */
1206                 if (!mlx4_is_slave(dev->dev)) {
1207                         union sl2vl_tbl_to_u64 sl2vl64;
1208                         int jj;
1209
1210                         for (jj = 0; jj < 8; jj++) {
1211                                 sl2vl64.sl8[jj] =
1212                                         eqe->event.port_mgmt_change.params.sl2vl_tbl_change_info.sl2vl_table[jj];
1213                                 pr_debug("port %u, sl2vl[%d] = %02x\n",
1214                                          port, jj, sl2vl64.sl8[jj]);
1215                         }
1216                         atomic64_set(&dev->sl2vl[port - 1], sl2vl64.sl64);
1217                 }
1218                 break;
1219         default:
1220                 pr_warn("Unsupported subtype 0x%x for "
1221                         "Port Management Change event\n", eqe->subtype);
1222         }
1223
1224         kfree(ew);
1225 }
1226
1227 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num,
1228                             enum ib_event_type type)
1229 {
1230         struct ib_event event;
1231
1232         event.device            = &dev->ib_dev;
1233         event.element.port_num  = port_num;
1234         event.event             = type;
1235
1236         ib_dispatch_event(&event);
1237 }
1238
1239 static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg)
1240 {
1241         unsigned long flags;
1242         struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context;
1243         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1244         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
1245         if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE)
1246                 queue_work(ctx->wq, &ctx->work);
1247         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
1248 }
1249
1250 static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx,
1251                                   struct mlx4_ib_demux_pv_qp *tun_qp,
1252                                   int index)
1253 {
1254         struct ib_sge sg_list;
1255         struct ib_recv_wr recv_wr, *bad_recv_wr;
1256         int size;
1257
1258         size = (tun_qp->qp->qp_type == IB_QPT_UD) ?
1259                 sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf);
1260
1261         sg_list.addr = tun_qp->ring[index].map;
1262         sg_list.length = size;
1263         sg_list.lkey = ctx->pd->local_dma_lkey;
1264
1265         recv_wr.next = NULL;
1266         recv_wr.sg_list = &sg_list;
1267         recv_wr.num_sge = 1;
1268         recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV |
1269                 MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt);
1270         ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map,
1271                                       size, DMA_FROM_DEVICE);
1272         return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr);
1273 }
1274
1275 static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port,
1276                 int slave, struct ib_sa_mad *sa_mad)
1277 {
1278         int ret = 0;
1279
1280         /* dispatch to different sa handlers */
1281         switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
1282         case IB_SA_ATTR_MC_MEMBER_REC:
1283                 ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad);
1284                 break;
1285         default:
1286                 break;
1287         }
1288         return ret;
1289 }
1290
1291 static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave)
1292 {
1293         int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave;
1294
1295         return (qpn >= proxy_start && qpn <= proxy_start + 1);
1296 }
1297
1298
1299 int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u8 port,
1300                          enum ib_qp_type dest_qpt, u16 pkey_index,
1301                          u32 remote_qpn, u32 qkey, struct ib_ah_attr *attr,
1302                          u8 *s_mac, u16 vlan_id, struct ib_mad *mad)
1303 {
1304         struct ib_sge list;
1305         struct ib_ud_wr wr;
1306         struct ib_send_wr *bad_wr;
1307         struct mlx4_ib_demux_pv_ctx *sqp_ctx;
1308         struct mlx4_ib_demux_pv_qp *sqp;
1309         struct mlx4_mad_snd_buf *sqp_mad;
1310         struct ib_ah *ah;
1311         struct ib_qp *send_qp = NULL;
1312         unsigned wire_tx_ix = 0;
1313         int ret = 0;
1314         u16 wire_pkey_ix;
1315         int src_qpnum;
1316         u8 sgid_index;
1317
1318
1319         sqp_ctx = dev->sriov.sqps[port-1];
1320
1321         /* check if proxy qp created */
1322         if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE)
1323                 return -EAGAIN;
1324
1325         if (dest_qpt == IB_QPT_SMI) {
1326                 src_qpnum = 0;
1327                 sqp = &sqp_ctx->qp[0];
1328                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
1329         } else {
1330                 src_qpnum = 1;
1331                 sqp = &sqp_ctx->qp[1];
1332                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index];
1333         }
1334
1335         send_qp = sqp->qp;
1336
1337         /* create ah */
1338         sgid_index = attr->grh.sgid_index;
1339         attr->grh.sgid_index = 0;
1340         ah = ib_create_ah(sqp_ctx->pd, attr);
1341         if (IS_ERR(ah))
1342                 return -ENOMEM;
1343         attr->grh.sgid_index = sgid_index;
1344         to_mah(ah)->av.ib.gid_index = sgid_index;
1345         /* get rid of force-loopback bit */
1346         to_mah(ah)->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF);
1347         spin_lock(&sqp->tx_lock);
1348         if (sqp->tx_ix_head - sqp->tx_ix_tail >=
1349             (MLX4_NUM_TUNNEL_BUFS - 1))
1350                 ret = -EAGAIN;
1351         else
1352                 wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
1353         spin_unlock(&sqp->tx_lock);
1354         if (ret)
1355                 goto out;
1356
1357         sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr);
1358         if (sqp->tx_ring[wire_tx_ix].ah)
1359                 ib_destroy_ah(sqp->tx_ring[wire_tx_ix].ah);
1360         sqp->tx_ring[wire_tx_ix].ah = ah;
1361         ib_dma_sync_single_for_cpu(&dev->ib_dev,
1362                                    sqp->tx_ring[wire_tx_ix].buf.map,
1363                                    sizeof (struct mlx4_mad_snd_buf),
1364                                    DMA_TO_DEVICE);
1365
1366         memcpy(&sqp_mad->payload, mad, sizeof *mad);
1367
1368         ib_dma_sync_single_for_device(&dev->ib_dev,
1369                                       sqp->tx_ring[wire_tx_ix].buf.map,
1370                                       sizeof (struct mlx4_mad_snd_buf),
1371                                       DMA_TO_DEVICE);
1372
1373         list.addr = sqp->tx_ring[wire_tx_ix].buf.map;
1374         list.length = sizeof (struct mlx4_mad_snd_buf);
1375         list.lkey = sqp_ctx->pd->local_dma_lkey;
1376
1377         wr.ah = ah;
1378         wr.port_num = port;
1379         wr.pkey_index = wire_pkey_ix;
1380         wr.remote_qkey = qkey;
1381         wr.remote_qpn = remote_qpn;
1382         wr.wr.next = NULL;
1383         wr.wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum);
1384         wr.wr.sg_list = &list;
1385         wr.wr.num_sge = 1;
1386         wr.wr.opcode = IB_WR_SEND;
1387         wr.wr.send_flags = IB_SEND_SIGNALED;
1388         if (s_mac)
1389                 memcpy(to_mah(ah)->av.eth.s_mac, s_mac, 6);
1390         if (vlan_id < 0x1000)
1391                 vlan_id |= (attr->sl & 7) << 13;
1392         to_mah(ah)->av.eth.vlan = cpu_to_be16(vlan_id);
1393
1394
1395         ret = ib_post_send(send_qp, &wr.wr, &bad_wr);
1396         if (!ret)
1397                 return 0;
1398
1399         spin_lock(&sqp->tx_lock);
1400         sqp->tx_ix_tail++;
1401         spin_unlock(&sqp->tx_lock);
1402         sqp->tx_ring[wire_tx_ix].ah = NULL;
1403 out:
1404         ib_destroy_ah(ah);
1405         return ret;
1406 }
1407
1408 static int get_slave_base_gid_ix(struct mlx4_ib_dev *dev, int slave, int port)
1409 {
1410         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1411                 return slave;
1412         return mlx4_get_base_gid_ix(dev->dev, slave, port);
1413 }
1414
1415 static void fill_in_real_sgid_index(struct mlx4_ib_dev *dev, int slave, int port,
1416                                     struct ib_ah_attr *ah_attr)
1417 {
1418         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1419                 ah_attr->grh.sgid_index = slave;
1420         else
1421                 ah_attr->grh.sgid_index += get_slave_base_gid_ix(dev, slave, port);
1422 }
1423
1424 static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc)
1425 {
1426         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1427         struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)];
1428         int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1);
1429         struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr;
1430         struct mlx4_ib_ah ah;
1431         struct ib_ah_attr ah_attr;
1432         u8 *slave_id;
1433         int slave;
1434         int port;
1435         u16 vlan_id;
1436
1437         /* Get slave that sent this packet */
1438         if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn ||
1439             wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX ||
1440             (wc->src_qp & 0x1) != ctx->port - 1 ||
1441             wc->src_qp & 0x4) {
1442                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp);
1443                 return;
1444         }
1445         slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8;
1446         if (slave != ctx->slave) {
1447                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: "
1448                              "belongs to another slave\n", wc->src_qp);
1449                 return;
1450         }
1451
1452         /* Map transaction ID */
1453         ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map,
1454                                    sizeof (struct mlx4_tunnel_mad),
1455                                    DMA_FROM_DEVICE);
1456         switch (tunnel->mad.mad_hdr.method) {
1457         case IB_MGMT_METHOD_SET:
1458         case IB_MGMT_METHOD_GET:
1459         case IB_MGMT_METHOD_REPORT:
1460         case IB_SA_METHOD_GET_TABLE:
1461         case IB_SA_METHOD_DELETE:
1462         case IB_SA_METHOD_GET_MULTI:
1463         case IB_SA_METHOD_GET_TRACE_TBL:
1464                 slave_id = (u8 *) &tunnel->mad.mad_hdr.tid;
1465                 if (*slave_id) {
1466                         mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d "
1467                                      "class:%d slave:%d\n", *slave_id,
1468                                      tunnel->mad.mad_hdr.mgmt_class, slave);
1469                         return;
1470                 } else
1471                         *slave_id = slave;
1472         default:
1473                 /* nothing */;
1474         }
1475
1476         /* Class-specific handling */
1477         switch (tunnel->mad.mad_hdr.mgmt_class) {
1478         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1479         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1480                 if (slave != mlx4_master_func_num(dev->dev) &&
1481                     !mlx4_vf_smi_enabled(dev->dev, slave, ctx->port))
1482                         return;
1483                 break;
1484         case IB_MGMT_CLASS_SUBN_ADM:
1485                 if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave,
1486                               (struct ib_sa_mad *) &tunnel->mad))
1487                         return;
1488                 break;
1489         case IB_MGMT_CLASS_CM:
1490                 if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave,
1491                               (struct ib_mad *) &tunnel->mad))
1492                         return;
1493                 break;
1494         case IB_MGMT_CLASS_DEVICE_MGMT:
1495                 if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET &&
1496                     tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET)
1497                         return;
1498                 break;
1499         default:
1500                 /* Drop unsupported classes for slaves in tunnel mode */
1501                 if (slave != mlx4_master_func_num(dev->dev)) {
1502                         mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d "
1503                                      "for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave);
1504                         return;
1505                 }
1506         }
1507
1508         /* We are using standard ib_core services to send the mad, so generate a
1509          * stadard address handle by decoding the tunnelled mlx4_ah fields */
1510         memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av));
1511         ah.ibah.device = ctx->ib_dev;
1512
1513         port = be32_to_cpu(ah.av.ib.port_pd) >> 24;
1514         port = mlx4_slave_convert_port(dev->dev, slave, port);
1515         if (port < 0)
1516                 return;
1517         ah.av.ib.port_pd = cpu_to_be32(port << 24 | (be32_to_cpu(ah.av.ib.port_pd) & 0xffffff));
1518
1519         mlx4_ib_query_ah(&ah.ibah, &ah_attr);
1520         if (ah_attr.ah_flags & IB_AH_GRH)
1521                 fill_in_real_sgid_index(dev, slave, ctx->port, &ah_attr);
1522
1523         memcpy(ah_attr.dmac, tunnel->hdr.mac, 6);
1524         vlan_id = be16_to_cpu(tunnel->hdr.vlan);
1525         /* if slave have default vlan use it */
1526         mlx4_get_slave_default_vlan(dev->dev, ctx->port, slave,
1527                                     &vlan_id, &ah_attr.sl);
1528
1529         mlx4_ib_send_to_wire(dev, slave, ctx->port,
1530                              is_proxy_qp0(dev, wc->src_qp, slave) ?
1531                              IB_QPT_SMI : IB_QPT_GSI,
1532                              be16_to_cpu(tunnel->hdr.pkey_index),
1533                              be32_to_cpu(tunnel->hdr.remote_qpn),
1534                              be32_to_cpu(tunnel->hdr.qkey),
1535                              &ah_attr, wc->smac, vlan_id, &tunnel->mad);
1536 }
1537
1538 static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1539                                  enum ib_qp_type qp_type, int is_tun)
1540 {
1541         int i;
1542         struct mlx4_ib_demux_pv_qp *tun_qp;
1543         int rx_buf_size, tx_buf_size;
1544
1545         if (qp_type > IB_QPT_GSI)
1546                 return -EINVAL;
1547
1548         tun_qp = &ctx->qp[qp_type];
1549
1550         tun_qp->ring = kzalloc(sizeof (struct mlx4_ib_buf) * MLX4_NUM_TUNNEL_BUFS,
1551                                GFP_KERNEL);
1552         if (!tun_qp->ring)
1553                 return -ENOMEM;
1554
1555         tun_qp->tx_ring = kcalloc(MLX4_NUM_TUNNEL_BUFS,
1556                                   sizeof (struct mlx4_ib_tun_tx_buf),
1557                                   GFP_KERNEL);
1558         if (!tun_qp->tx_ring) {
1559                 kfree(tun_qp->ring);
1560                 tun_qp->ring = NULL;
1561                 return -ENOMEM;
1562         }
1563
1564         if (is_tun) {
1565                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1566                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1567         } else {
1568                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1569                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1570         }
1571
1572         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1573                 tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL);
1574                 if (!tun_qp->ring[i].addr)
1575                         goto err;
1576                 tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev,
1577                                                         tun_qp->ring[i].addr,
1578                                                         rx_buf_size,
1579                                                         DMA_FROM_DEVICE);
1580                 if (ib_dma_mapping_error(ctx->ib_dev, tun_qp->ring[i].map)) {
1581                         kfree(tun_qp->ring[i].addr);
1582                         goto err;
1583                 }
1584         }
1585
1586         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1587                 tun_qp->tx_ring[i].buf.addr =
1588                         kmalloc(tx_buf_size, GFP_KERNEL);
1589                 if (!tun_qp->tx_ring[i].buf.addr)
1590                         goto tx_err;
1591                 tun_qp->tx_ring[i].buf.map =
1592                         ib_dma_map_single(ctx->ib_dev,
1593                                           tun_qp->tx_ring[i].buf.addr,
1594                                           tx_buf_size,
1595                                           DMA_TO_DEVICE);
1596                 if (ib_dma_mapping_error(ctx->ib_dev,
1597                                          tun_qp->tx_ring[i].buf.map)) {
1598                         kfree(tun_qp->tx_ring[i].buf.addr);
1599                         goto tx_err;
1600                 }
1601                 tun_qp->tx_ring[i].ah = NULL;
1602         }
1603         spin_lock_init(&tun_qp->tx_lock);
1604         tun_qp->tx_ix_head = 0;
1605         tun_qp->tx_ix_tail = 0;
1606         tun_qp->proxy_qpt = qp_type;
1607
1608         return 0;
1609
1610 tx_err:
1611         while (i > 0) {
1612                 --i;
1613                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1614                                     tx_buf_size, DMA_TO_DEVICE);
1615                 kfree(tun_qp->tx_ring[i].buf.addr);
1616         }
1617         kfree(tun_qp->tx_ring);
1618         tun_qp->tx_ring = NULL;
1619         i = MLX4_NUM_TUNNEL_BUFS;
1620 err:
1621         while (i > 0) {
1622                 --i;
1623                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1624                                     rx_buf_size, DMA_FROM_DEVICE);
1625                 kfree(tun_qp->ring[i].addr);
1626         }
1627         kfree(tun_qp->ring);
1628         tun_qp->ring = NULL;
1629         return -ENOMEM;
1630 }
1631
1632 static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1633                                      enum ib_qp_type qp_type, int is_tun)
1634 {
1635         int i;
1636         struct mlx4_ib_demux_pv_qp *tun_qp;
1637         int rx_buf_size, tx_buf_size;
1638
1639         if (qp_type > IB_QPT_GSI)
1640                 return;
1641
1642         tun_qp = &ctx->qp[qp_type];
1643         if (is_tun) {
1644                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1645                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1646         } else {
1647                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1648                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1649         }
1650
1651
1652         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1653                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1654                                     rx_buf_size, DMA_FROM_DEVICE);
1655                 kfree(tun_qp->ring[i].addr);
1656         }
1657
1658         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1659                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1660                                     tx_buf_size, DMA_TO_DEVICE);
1661                 kfree(tun_qp->tx_ring[i].buf.addr);
1662                 if (tun_qp->tx_ring[i].ah)
1663                         ib_destroy_ah(tun_qp->tx_ring[i].ah);
1664         }
1665         kfree(tun_qp->tx_ring);
1666         kfree(tun_qp->ring);
1667 }
1668
1669 static void mlx4_ib_tunnel_comp_worker(struct work_struct *work)
1670 {
1671         struct mlx4_ib_demux_pv_ctx *ctx;
1672         struct mlx4_ib_demux_pv_qp *tun_qp;
1673         struct ib_wc wc;
1674         int ret;
1675         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1676         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1677
1678         while (ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1679                 tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1680                 if (wc.status == IB_WC_SUCCESS) {
1681                         switch (wc.opcode) {
1682                         case IB_WC_RECV:
1683                                 mlx4_ib_multiplex_mad(ctx, &wc);
1684                                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp,
1685                                                              wc.wr_id &
1686                                                              (MLX4_NUM_TUNNEL_BUFS - 1));
1687                                 if (ret)
1688                                         pr_err("Failed reposting tunnel "
1689                                                "buf:%lld\n", wc.wr_id);
1690                                 break;
1691                         case IB_WC_SEND:
1692                                 pr_debug("received tunnel send completion:"
1693                                          "wrid=0x%llx, status=0x%x\n",
1694                                          wc.wr_id, wc.status);
1695                                 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1696                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1697                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1698                                         = NULL;
1699                                 spin_lock(&tun_qp->tx_lock);
1700                                 tun_qp->tx_ix_tail++;
1701                                 spin_unlock(&tun_qp->tx_lock);
1702
1703                                 break;
1704                         default:
1705                                 break;
1706                         }
1707                 } else  {
1708                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1709                                  " status = %d, wrid = 0x%llx\n",
1710                                  ctx->slave, wc.status, wc.wr_id);
1711                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1712                                 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1713                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1714                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1715                                         = NULL;
1716                                 spin_lock(&tun_qp->tx_lock);
1717                                 tun_qp->tx_ix_tail++;
1718                                 spin_unlock(&tun_qp->tx_lock);
1719                         }
1720                 }
1721         }
1722 }
1723
1724 static void pv_qp_event_handler(struct ib_event *event, void *qp_context)
1725 {
1726         struct mlx4_ib_demux_pv_ctx *sqp = qp_context;
1727
1728         /* It's worse than that! He's dead, Jim! */
1729         pr_err("Fatal error (%d) on a MAD QP on port %d\n",
1730                event->event, sqp->port);
1731 }
1732
1733 static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx,
1734                             enum ib_qp_type qp_type, int create_tun)
1735 {
1736         int i, ret;
1737         struct mlx4_ib_demux_pv_qp *tun_qp;
1738         struct mlx4_ib_qp_tunnel_init_attr qp_init_attr;
1739         struct ib_qp_attr attr;
1740         int qp_attr_mask_INIT;
1741
1742         if (qp_type > IB_QPT_GSI)
1743                 return -EINVAL;
1744
1745         tun_qp = &ctx->qp[qp_type];
1746
1747         memset(&qp_init_attr, 0, sizeof qp_init_attr);
1748         qp_init_attr.init_attr.send_cq = ctx->cq;
1749         qp_init_attr.init_attr.recv_cq = ctx->cq;
1750         qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
1751         qp_init_attr.init_attr.cap.max_send_wr = MLX4_NUM_TUNNEL_BUFS;
1752         qp_init_attr.init_attr.cap.max_recv_wr = MLX4_NUM_TUNNEL_BUFS;
1753         qp_init_attr.init_attr.cap.max_send_sge = 1;
1754         qp_init_attr.init_attr.cap.max_recv_sge = 1;
1755         if (create_tun) {
1756                 qp_init_attr.init_attr.qp_type = IB_QPT_UD;
1757                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_TUNNEL_QP;
1758                 qp_init_attr.port = ctx->port;
1759                 qp_init_attr.slave = ctx->slave;
1760                 qp_init_attr.proxy_qp_type = qp_type;
1761                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX |
1762                            IB_QP_QKEY | IB_QP_PORT;
1763         } else {
1764                 qp_init_attr.init_attr.qp_type = qp_type;
1765                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_SQP;
1766                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY;
1767         }
1768         qp_init_attr.init_attr.port_num = ctx->port;
1769         qp_init_attr.init_attr.qp_context = ctx;
1770         qp_init_attr.init_attr.event_handler = pv_qp_event_handler;
1771         tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr);
1772         if (IS_ERR(tun_qp->qp)) {
1773                 ret = PTR_ERR(tun_qp->qp);
1774                 tun_qp->qp = NULL;
1775                 pr_err("Couldn't create %s QP (%d)\n",
1776                        create_tun ? "tunnel" : "special", ret);
1777                 return ret;
1778         }
1779
1780         memset(&attr, 0, sizeof attr);
1781         attr.qp_state = IB_QPS_INIT;
1782         ret = 0;
1783         if (create_tun)
1784                 ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave,
1785                                               ctx->port, IB_DEFAULT_PKEY_FULL,
1786                                               &attr.pkey_index);
1787         if (ret || !create_tun)
1788                 attr.pkey_index =
1789                         to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0];
1790         attr.qkey = IB_QP1_QKEY;
1791         attr.port_num = ctx->port;
1792         ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT);
1793         if (ret) {
1794                 pr_err("Couldn't change %s qp state to INIT (%d)\n",
1795                        create_tun ? "tunnel" : "special", ret);
1796                 goto err_qp;
1797         }
1798         attr.qp_state = IB_QPS_RTR;
1799         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE);
1800         if (ret) {
1801                 pr_err("Couldn't change %s qp state to RTR (%d)\n",
1802                        create_tun ? "tunnel" : "special", ret);
1803                 goto err_qp;
1804         }
1805         attr.qp_state = IB_QPS_RTS;
1806         attr.sq_psn = 0;
1807         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN);
1808         if (ret) {
1809                 pr_err("Couldn't change %s qp state to RTS (%d)\n",
1810                        create_tun ? "tunnel" : "special", ret);
1811                 goto err_qp;
1812         }
1813
1814         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1815                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i);
1816                 if (ret) {
1817                         pr_err(" mlx4_ib_post_pv_buf error"
1818                                " (err = %d, i = %d)\n", ret, i);
1819                         goto err_qp;
1820                 }
1821         }
1822         return 0;
1823
1824 err_qp:
1825         ib_destroy_qp(tun_qp->qp);
1826         tun_qp->qp = NULL;
1827         return ret;
1828 }
1829
1830 /*
1831  * IB MAD completion callback for real SQPs
1832  */
1833 static void mlx4_ib_sqp_comp_worker(struct work_struct *work)
1834 {
1835         struct mlx4_ib_demux_pv_ctx *ctx;
1836         struct mlx4_ib_demux_pv_qp *sqp;
1837         struct ib_wc wc;
1838         struct ib_grh *grh;
1839         struct ib_mad *mad;
1840
1841         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1842         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1843
1844         while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1845                 sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1846                 if (wc.status == IB_WC_SUCCESS) {
1847                         switch (wc.opcode) {
1848                         case IB_WC_SEND:
1849                                 ib_destroy_ah(sqp->tx_ring[wc.wr_id &
1850                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1851                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1852                                         = NULL;
1853                                 spin_lock(&sqp->tx_lock);
1854                                 sqp->tx_ix_tail++;
1855                                 spin_unlock(&sqp->tx_lock);
1856                                 break;
1857                         case IB_WC_RECV:
1858                                 mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *)
1859                                                 (sqp->ring[wc.wr_id &
1860                                                 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->payload);
1861                                 grh = &(((struct mlx4_mad_rcv_buf *)
1862                                                 (sqp->ring[wc.wr_id &
1863                                                 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->grh);
1864                                 mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad);
1865                                 if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id &
1866                                                            (MLX4_NUM_TUNNEL_BUFS - 1)))
1867                                         pr_err("Failed reposting SQP "
1868                                                "buf:%lld\n", wc.wr_id);
1869                                 break;
1870                         default:
1871                                 BUG_ON(1);
1872                                 break;
1873                         }
1874                 } else  {
1875                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1876                                  " status = %d, wrid = 0x%llx\n",
1877                                  ctx->slave, wc.status, wc.wr_id);
1878                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1879                                 ib_destroy_ah(sqp->tx_ring[wc.wr_id &
1880                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1881                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1882                                         = NULL;
1883                                 spin_lock(&sqp->tx_lock);
1884                                 sqp->tx_ix_tail++;
1885                                 spin_unlock(&sqp->tx_lock);
1886                         }
1887                 }
1888         }
1889 }
1890
1891 static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port,
1892                                struct mlx4_ib_demux_pv_ctx **ret_ctx)
1893 {
1894         struct mlx4_ib_demux_pv_ctx *ctx;
1895
1896         *ret_ctx = NULL;
1897         ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL);
1898         if (!ctx) {
1899                 pr_err("failed allocating pv resource context "
1900                        "for port %d, slave %d\n", port, slave);
1901                 return -ENOMEM;
1902         }
1903
1904         ctx->ib_dev = &dev->ib_dev;
1905         ctx->port = port;
1906         ctx->slave = slave;
1907         *ret_ctx = ctx;
1908         return 0;
1909 }
1910
1911 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port)
1912 {
1913         if (dev->sriov.demux[port - 1].tun[slave]) {
1914                 kfree(dev->sriov.demux[port - 1].tun[slave]);
1915                 dev->sriov.demux[port - 1].tun[slave] = NULL;
1916         }
1917 }
1918
1919 static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
1920                                int create_tun, struct mlx4_ib_demux_pv_ctx *ctx)
1921 {
1922         int ret, cq_size;
1923         struct ib_cq_init_attr cq_attr = {};
1924
1925         if (ctx->state != DEMUX_PV_STATE_DOWN)
1926                 return -EEXIST;
1927
1928         ctx->state = DEMUX_PV_STATE_STARTING;
1929         /* have QP0 only if link layer is IB */
1930         if (rdma_port_get_link_layer(ibdev, ctx->port) ==
1931             IB_LINK_LAYER_INFINIBAND)
1932                 ctx->has_smi = 1;
1933
1934         if (ctx->has_smi) {
1935                 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun);
1936                 if (ret) {
1937                         pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret);
1938                         goto err_out;
1939                 }
1940         }
1941
1942         ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun);
1943         if (ret) {
1944                 pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret);
1945                 goto err_out_qp0;
1946         }
1947
1948         cq_size = 2 * MLX4_NUM_TUNNEL_BUFS;
1949         if (ctx->has_smi)
1950                 cq_size *= 2;
1951
1952         cq_attr.cqe = cq_size;
1953         ctx->cq = ib_create_cq(ctx->ib_dev, mlx4_ib_tunnel_comp_handler,
1954                                NULL, ctx, &cq_attr);
1955         if (IS_ERR(ctx->cq)) {
1956                 ret = PTR_ERR(ctx->cq);
1957                 pr_err("Couldn't create tunnel CQ (%d)\n", ret);
1958                 goto err_buf;
1959         }
1960
1961         ctx->pd = ib_alloc_pd(ctx->ib_dev, 0);
1962         if (IS_ERR(ctx->pd)) {
1963                 ret = PTR_ERR(ctx->pd);
1964                 pr_err("Couldn't create tunnel PD (%d)\n", ret);
1965                 goto err_cq;
1966         }
1967
1968         if (ctx->has_smi) {
1969                 ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun);
1970                 if (ret) {
1971                         pr_err("Couldn't create %s QP0 (%d)\n",
1972                                create_tun ? "tunnel for" : "",  ret);
1973                         goto err_pd;
1974                 }
1975         }
1976
1977         ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun);
1978         if (ret) {
1979                 pr_err("Couldn't create %s QP1 (%d)\n",
1980                        create_tun ? "tunnel for" : "",  ret);
1981                 goto err_qp0;
1982         }
1983
1984         if (create_tun)
1985                 INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker);
1986         else
1987                 INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker);
1988
1989         ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq;
1990
1991         ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1992         if (ret) {
1993                 pr_err("Couldn't arm tunnel cq (%d)\n", ret);
1994                 goto err_wq;
1995         }
1996         ctx->state = DEMUX_PV_STATE_ACTIVE;
1997         return 0;
1998
1999 err_wq:
2000         ctx->wq = NULL;
2001         ib_destroy_qp(ctx->qp[1].qp);
2002         ctx->qp[1].qp = NULL;
2003
2004
2005 err_qp0:
2006         if (ctx->has_smi)
2007                 ib_destroy_qp(ctx->qp[0].qp);
2008         ctx->qp[0].qp = NULL;
2009
2010 err_pd:
2011         ib_dealloc_pd(ctx->pd);
2012         ctx->pd = NULL;
2013
2014 err_cq:
2015         ib_destroy_cq(ctx->cq);
2016         ctx->cq = NULL;
2017
2018 err_buf:
2019         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun);
2020
2021 err_out_qp0:
2022         if (ctx->has_smi)
2023                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun);
2024 err_out:
2025         ctx->state = DEMUX_PV_STATE_DOWN;
2026         return ret;
2027 }
2028
2029 static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port,
2030                                  struct mlx4_ib_demux_pv_ctx *ctx, int flush)
2031 {
2032         if (!ctx)
2033                 return;
2034         if (ctx->state > DEMUX_PV_STATE_DOWN) {
2035                 ctx->state = DEMUX_PV_STATE_DOWNING;
2036                 if (flush)
2037                         flush_workqueue(ctx->wq);
2038                 if (ctx->has_smi) {
2039                         ib_destroy_qp(ctx->qp[0].qp);
2040                         ctx->qp[0].qp = NULL;
2041                         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1);
2042                 }
2043                 ib_destroy_qp(ctx->qp[1].qp);
2044                 ctx->qp[1].qp = NULL;
2045                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1);
2046                 ib_dealloc_pd(ctx->pd);
2047                 ctx->pd = NULL;
2048                 ib_destroy_cq(ctx->cq);
2049                 ctx->cq = NULL;
2050                 ctx->state = DEMUX_PV_STATE_DOWN;
2051         }
2052 }
2053
2054 static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave,
2055                                   int port, int do_init)
2056 {
2057         int ret = 0;
2058
2059         if (!do_init) {
2060                 clean_vf_mcast(&dev->sriov.demux[port - 1], slave);
2061                 /* for master, destroy real sqp resources */
2062                 if (slave == mlx4_master_func_num(dev->dev))
2063                         destroy_pv_resources(dev, slave, port,
2064                                              dev->sriov.sqps[port - 1], 1);
2065                 /* destroy the tunnel qp resources */
2066                 destroy_pv_resources(dev, slave, port,
2067                                      dev->sriov.demux[port - 1].tun[slave], 1);
2068                 return 0;
2069         }
2070
2071         /* create the tunnel qp resources */
2072         ret = create_pv_resources(&dev->ib_dev, slave, port, 1,
2073                                   dev->sriov.demux[port - 1].tun[slave]);
2074
2075         /* for master, create the real sqp resources */
2076         if (!ret && slave == mlx4_master_func_num(dev->dev))
2077                 ret = create_pv_resources(&dev->ib_dev, slave, port, 0,
2078                                           dev->sriov.sqps[port - 1]);
2079         return ret;
2080 }
2081
2082 void mlx4_ib_tunnels_update_work(struct work_struct *work)
2083 {
2084         struct mlx4_ib_demux_work *dmxw;
2085
2086         dmxw = container_of(work, struct mlx4_ib_demux_work, work);
2087         mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port,
2088                                dmxw->do_init);
2089         kfree(dmxw);
2090         return;
2091 }
2092
2093 static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev,
2094                                        struct mlx4_ib_demux_ctx *ctx,
2095                                        int port)
2096 {
2097         char name[12];
2098         int ret = 0;
2099         int i;
2100
2101         ctx->tun = kcalloc(dev->dev->caps.sqp_demux,
2102                            sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL);
2103         if (!ctx->tun)
2104                 return -ENOMEM;
2105
2106         ctx->dev = dev;
2107         ctx->port = port;
2108         ctx->ib_dev = &dev->ib_dev;
2109
2110         for (i = 0;
2111              i < min(dev->dev->caps.sqp_demux,
2112              (u16)(dev->dev->persist->num_vfs + 1));
2113              i++) {
2114                 struct mlx4_active_ports actv_ports =
2115                         mlx4_get_active_ports(dev->dev, i);
2116
2117                 if (!test_bit(port - 1, actv_ports.ports))
2118                         continue;
2119
2120                 ret = alloc_pv_object(dev, i, port, &ctx->tun[i]);
2121                 if (ret) {
2122                         ret = -ENOMEM;
2123                         goto err_mcg;
2124                 }
2125         }
2126
2127         ret = mlx4_ib_mcg_port_init(ctx);
2128         if (ret) {
2129                 pr_err("Failed initializing mcg para-virt (%d)\n", ret);
2130                 goto err_mcg;
2131         }
2132
2133         snprintf(name, sizeof name, "mlx4_ibt%d", port);
2134         ctx->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2135         if (!ctx->wq) {
2136                 pr_err("Failed to create tunnelling WQ for port %d\n", port);
2137                 ret = -ENOMEM;
2138                 goto err_wq;
2139         }
2140
2141         snprintf(name, sizeof name, "mlx4_ibud%d", port);
2142         ctx->ud_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2143         if (!ctx->ud_wq) {
2144                 pr_err("Failed to create up/down WQ for port %d\n", port);
2145                 ret = -ENOMEM;
2146                 goto err_udwq;
2147         }
2148
2149         return 0;
2150
2151 err_udwq:
2152         destroy_workqueue(ctx->wq);
2153         ctx->wq = NULL;
2154
2155 err_wq:
2156         mlx4_ib_mcg_port_cleanup(ctx, 1);
2157 err_mcg:
2158         for (i = 0; i < dev->dev->caps.sqp_demux; i++)
2159                 free_pv_object(dev, i, port);
2160         kfree(ctx->tun);
2161         ctx->tun = NULL;
2162         return ret;
2163 }
2164
2165 static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx)
2166 {
2167         if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) {
2168                 sqp_ctx->state = DEMUX_PV_STATE_DOWNING;
2169                 flush_workqueue(sqp_ctx->wq);
2170                 if (sqp_ctx->has_smi) {
2171                         ib_destroy_qp(sqp_ctx->qp[0].qp);
2172                         sqp_ctx->qp[0].qp = NULL;
2173                         mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0);
2174                 }
2175                 ib_destroy_qp(sqp_ctx->qp[1].qp);
2176                 sqp_ctx->qp[1].qp = NULL;
2177                 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0);
2178                 ib_dealloc_pd(sqp_ctx->pd);
2179                 sqp_ctx->pd = NULL;
2180                 ib_destroy_cq(sqp_ctx->cq);
2181                 sqp_ctx->cq = NULL;
2182                 sqp_ctx->state = DEMUX_PV_STATE_DOWN;
2183         }
2184 }
2185
2186 static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx)
2187 {
2188         int i;
2189         if (ctx) {
2190                 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
2191                 mlx4_ib_mcg_port_cleanup(ctx, 1);
2192                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2193                         if (!ctx->tun[i])
2194                                 continue;
2195                         if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN)
2196                                 ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING;
2197                 }
2198                 flush_workqueue(ctx->wq);
2199                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2200                         destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0);
2201                         free_pv_object(dev, i, ctx->port);
2202                 }
2203                 kfree(ctx->tun);
2204                 destroy_workqueue(ctx->ud_wq);
2205                 destroy_workqueue(ctx->wq);
2206         }
2207 }
2208
2209 static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init)
2210 {
2211         int i;
2212
2213         if (!mlx4_is_master(dev->dev))
2214                 return;
2215         /* initialize or tear down tunnel QPs for the master */
2216         for (i = 0; i < dev->dev->caps.num_ports; i++)
2217                 mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init);
2218         return;
2219 }
2220
2221 int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev)
2222 {
2223         int i = 0;
2224         int err;
2225
2226         if (!mlx4_is_mfunc(dev->dev))
2227                 return 0;
2228
2229         dev->sriov.is_going_down = 0;
2230         spin_lock_init(&dev->sriov.going_down_lock);
2231         mlx4_ib_cm_paravirt_init(dev);
2232
2233         mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n");
2234
2235         if (mlx4_is_slave(dev->dev)) {
2236                 mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n");
2237                 return 0;
2238         }
2239
2240         for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2241                 if (i == mlx4_master_func_num(dev->dev))
2242                         mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid);
2243                 else
2244                         mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid());
2245         }
2246
2247         err = mlx4_ib_init_alias_guid_service(dev);
2248         if (err) {
2249                 mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n");
2250                 goto paravirt_err;
2251         }
2252         err = mlx4_ib_device_register_sysfs(dev);
2253         if (err) {
2254                 mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n");
2255                 goto sysfs_err;
2256         }
2257
2258         mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n",
2259                      dev->dev->caps.sqp_demux);
2260         for (i = 0; i < dev->num_ports; i++) {
2261                 union ib_gid gid;
2262                 err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1);
2263                 if (err)
2264                         goto demux_err;
2265                 dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id;
2266                 err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1,
2267                                       &dev->sriov.sqps[i]);
2268                 if (err)
2269                         goto demux_err;
2270                 err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1);
2271                 if (err)
2272                         goto free_pv;
2273         }
2274         mlx4_ib_master_tunnels(dev, 1);
2275         return 0;
2276
2277 free_pv:
2278         free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2279 demux_err:
2280         while (--i >= 0) {
2281                 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2282                 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2283         }
2284         mlx4_ib_device_unregister_sysfs(dev);
2285
2286 sysfs_err:
2287         mlx4_ib_destroy_alias_guid_service(dev);
2288
2289 paravirt_err:
2290         mlx4_ib_cm_paravirt_clean(dev, -1);
2291
2292         return err;
2293 }
2294
2295 void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev)
2296 {
2297         int i;
2298         unsigned long flags;
2299
2300         if (!mlx4_is_mfunc(dev->dev))
2301                 return;
2302
2303         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
2304         dev->sriov.is_going_down = 1;
2305         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
2306         if (mlx4_is_master(dev->dev)) {
2307                 for (i = 0; i < dev->num_ports; i++) {
2308                         flush_workqueue(dev->sriov.demux[i].ud_wq);
2309                         mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]);
2310                         kfree(dev->sriov.sqps[i]);
2311                         dev->sriov.sqps[i] = NULL;
2312                         mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2313                 }
2314
2315                 mlx4_ib_cm_paravirt_clean(dev, -1);
2316                 mlx4_ib_destroy_alias_guid_service(dev);
2317                 mlx4_ib_device_unregister_sysfs(dev);
2318         }
2319 }