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 #include <linux/ip.h>
  43 #include <net/ipv6.h>
  44
  45 #include <linux/mlx4/driver.h>
  46 #include "mlx4_ib.h"
  47
  48 enum {
  49         MLX4_IB_VENDOR_CLASS1 = 0x9,
  50         MLX4_IB_VENDOR_CLASS2 = 0xa
  51 };
  52
  53 #define MLX4_TUN_SEND_WRID_SHIFT 34
  54 #define MLX4_TUN_QPN_SHIFT 32
  55 #define MLX4_TUN_WRID_RECV (((u64) 1) << MLX4_TUN_SEND_WRID_SHIFT)
  56 #define MLX4_TUN_SET_WRID_QPN(a) (((u64) ((a) & 0x3)) << MLX4_TUN_QPN_SHIFT)
  57
  58 #define MLX4_TUN_IS_RECV(a)  (((a) >>  MLX4_TUN_SEND_WRID_SHIFT) & 0x1)
  59 #define MLX4_TUN_WRID_QPN(a) (((a) >> MLX4_TUN_QPN_SHIFT) & 0x3)
  60
  61  /* Port mgmt change event handling */
  62
  63 #define GET_BLK_PTR_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.block_ptr)
  64 #define GET_MASK_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.tbl_entries_mask)
  65 #define NUM_IDX_IN_PKEY_TBL_BLK 32
  66 #define GUID_TBL_ENTRY_SIZE 8      /* size in bytes */
  67 #define GUID_TBL_BLK_NUM_ENTRIES 8
  68 #define GUID_TBL_BLK_SIZE (GUID_TBL_ENTRY_SIZE * GUID_TBL_BLK_NUM_ENTRIES)
  69
  70 struct mlx4_mad_rcv_buf {
  71         struct ib_grh grh;
  72         u8 payload[256];
  73 } __packed;
  74
  75 struct mlx4_mad_snd_buf {
  76         u8 payload[256];
  77 } __packed;
  78
  79 struct mlx4_tunnel_mad {
  80         struct ib_grh grh;
  81         struct mlx4_ib_tunnel_header hdr;
  82         struct ib_mad mad;
  83 } __packed;
  84
  85 struct mlx4_rcv_tunnel_mad {
  86         struct mlx4_rcv_tunnel_hdr hdr;
  87         struct ib_grh grh;
  88         struct ib_mad mad;
  89 } __packed;
  90
  91 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num);
  92 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num);
  93 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
  94                                 int block, u32 change_bitmap);
  95
  96 __be64 mlx4_ib_gen_node_guid(void)
  97 {
  98 #define NODE_GUID_HI    ((u64) (((u64)IB_OPENIB_OUI) << 40))
  99         return cpu_to_be64(NODE_GUID_HI | prandom_u32());
 100 }
 101
 102 __be64 mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx *ctx)
 103 {
 104         return cpu_to_be64(atomic_inc_return(&ctx->tid)) |
 105                 cpu_to_be64(0xff00000000000000LL);
 106 }
 107
 108 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags,
 109                  int port, const struct ib_wc *in_wc,
 110                  const struct ib_grh *in_grh,
 111                  const void *in_mad, void *response_mad)
 112 {
 113         struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
 114         void *inbox;
 115         int err;
 116         u32 in_modifier = port;
 117         u8 op_modifier = 0;
 118
 119         inmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 120         if (IS_ERR(inmailbox))
 121                 return PTR_ERR(inmailbox);
 122         inbox = inmailbox->buf;
 123
 124         outmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 125         if (IS_ERR(outmailbox)) {
 126                 mlx4_free_cmd_mailbox(dev->dev, inmailbox);
 127                 return PTR_ERR(outmailbox);
 128         }
 129
 130         memcpy(inbox, in_mad, 256);
 131
 132         /*
 133          * Key check traps can't be generated unless we have in_wc to
 134          * tell us where to send the trap.
 135          */
 136         if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_MKEY) || !in_wc)
 137                 op_modifier |= 0x1;
 138         if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_BKEY) || !in_wc)
 139                 op_modifier |= 0x2;
 140         if (mlx4_is_mfunc(dev->dev) &&
 141             (mad_ifc_flags & MLX4_MAD_IFC_NET_VIEW || in_wc))
 142                 op_modifier |= 0x8;
 143
 144         if (in_wc) {
 145                 struct {
 146                         __be32          my_qpn;
 147                         u32             reserved1;
 148                         __be32          rqpn;
 149                         u8              sl;
 150                         u8              g_path;
 151                         u16             reserved2[2];
 152                         __be16          pkey;
 153                         u32             reserved3[11];
 154                         u8              grh[40];
 155                 } *ext_info;
 156
 157                 memset(inbox + 256, 0, 256);
 158                 ext_info = inbox + 256;
 159
 160                 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num);
 161                 ext_info->rqpn   = cpu_to_be32(in_wc->src_qp);
 162                 ext_info->sl     = in_wc->sl << 4;
 163                 ext_info->g_path = in_wc->dlid_path_bits |
 164                         (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
 165                 ext_info->pkey   = cpu_to_be16(in_wc->pkey_index);
 166
 167                 if (in_grh)
 168                         memcpy(ext_info->grh, in_grh, 40);
 169
 170                 op_modifier |= 0x4;
 171
 172                 in_modifier |= ib_lid_cpu16(in_wc->slid) << 16;
 173         }
 174
 175         err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier,
 176                            mlx4_is_master(dev->dev) ? (op_modifier & ~0x8) : op_modifier,
 177                            MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
 178                            (op_modifier & 0x8) ? MLX4_CMD_NATIVE : MLX4_CMD_WRAPPED);
 179
 180         if (!err)
 181                 memcpy(response_mad, outmailbox->buf, 256);
 182
 183         mlx4_free_cmd_mailbox(dev->dev, inmailbox);
 184         mlx4_free_cmd_mailbox(dev->dev, outmailbox);
 185
 186         return err;
 187 }
 188
 189 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl)
 190 {
 191         struct ib_ah *new_ah;
 192         struct rdma_ah_attr ah_attr;
 193         unsigned long flags;
 194
 195         if (!dev->send_agent[port_num - 1][0])
 196                 return;
 197
 198         memset(&ah_attr, 0, sizeof ah_attr);
 199         ah_attr.type = rdma_ah_find_type(&dev->ib_dev, port_num);
 200         rdma_ah_set_dlid(&ah_attr, lid);
 201         rdma_ah_set_sl(&ah_attr, sl);
 202         rdma_ah_set_port_num(&ah_attr, port_num);
 203
 204         new_ah = rdma_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
 205                                 &ah_attr);
 206         if (IS_ERR(new_ah))
 207                 return;
 208
 209         spin_lock_irqsave(&dev->sm_lock, flags);
 210         if (dev->sm_ah[port_num - 1])
 211                 rdma_destroy_ah(dev->sm_ah[port_num - 1]);
 212         dev->sm_ah[port_num - 1] = new_ah;
 213         spin_unlock_irqrestore(&dev->sm_lock, flags);
 214 }
 215
 216 /*
 217  * Snoop SM MADs for port info, GUID info, and  P_Key table sets, so we can
 218  * synthesize LID change, Client-Rereg, GID change, and P_Key change events.
 219  */
 220 static void smp_snoop(struct ib_device *ibdev, u8 port_num, const struct ib_mad *mad,
 221                       u16 prev_lid)
 222 {
 223         struct ib_port_info *pinfo;
 224         u16 lid;
 225         __be16 *base;
 226         u32 bn, pkey_change_bitmap;
 227         int i;
 228
 229
 230         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 231         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 232              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 233             mad->mad_hdr.method == IB_MGMT_METHOD_SET)
 234                 switch (mad->mad_hdr.attr_id) {
 235                 case IB_SMP_ATTR_PORT_INFO:
 236                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
 237                                 return;
 238                         pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data;
 239                         lid = be16_to_cpu(pinfo->lid);
 240
 241                         update_sm_ah(dev, port_num,
 242                                      be16_to_cpu(pinfo->sm_lid),
 243                                      pinfo->neighbormtu_mastersmsl & 0xf);
 244
 245                         if (pinfo->clientrereg_resv_subnetto & 0x80)
 246                                 handle_client_rereg_event(dev, port_num);
 247
 248                         if (prev_lid != lid)
 249                                 handle_lid_change_event(dev, port_num);
 250                         break;
 251
 252                 case IB_SMP_ATTR_PKEY_TABLE:
 253                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
 254                                 return;
 255                         if (!mlx4_is_mfunc(dev->dev)) {
 256                                 mlx4_ib_dispatch_event(dev, port_num,
 257                                                        IB_EVENT_PKEY_CHANGE);
 258                                 break;
 259                         }
 260
 261                         /* at this point, we are running in the master.
 262                          * Slaves do not receive SMPs.
 263                          */
 264                         bn  = be32_to_cpu(((struct ib_smp *)mad)->attr_mod) & 0xFFFF;
 265                         base = (__be16 *) &(((struct ib_smp *)mad)->data[0]);
 266                         pkey_change_bitmap = 0;
 267                         for (i = 0; i < 32; i++) {
 268                                 pr_debug("PKEY[%d] = x%x\n",
 269                                          i + bn*32, be16_to_cpu(base[i]));
 270                                 if (be16_to_cpu(base[i]) !=
 271                                     dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32]) {
 272                                         pkey_change_bitmap |= (1 << i);
 273                                         dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32] =
 274                                                 be16_to_cpu(base[i]);
 275                                 }
 276                         }
 277                         pr_debug("PKEY Change event: port=%d, "
 278                                  "block=0x%x, change_bitmap=0x%x\n",
 279                                  port_num, bn, pkey_change_bitmap);
 280
 281                         if (pkey_change_bitmap) {
 282                                 mlx4_ib_dispatch_event(dev, port_num,
 283                                                        IB_EVENT_PKEY_CHANGE);
 284                                 if (!dev->sriov.is_going_down)
 285                                         __propagate_pkey_ev(dev, port_num, bn,
 286                                                             pkey_change_bitmap);
 287                         }
 288                         break;
 289
 290                 case IB_SMP_ATTR_GUID_INFO:
 291                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
 292                                 return;
 293                         /* paravirtualized master's guid is guid 0 -- does not change */
 294                         if (!mlx4_is_master(dev->dev))
 295                                 mlx4_ib_dispatch_event(dev, port_num,
 296                                                        IB_EVENT_GID_CHANGE);
 297                         /*if master, notify relevant slaves*/
 298                         if (mlx4_is_master(dev->dev) &&
 299                             !dev->sriov.is_going_down) {
 300                                 bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod);
 301                                 mlx4_ib_update_cache_on_guid_change(dev, bn, port_num,
 302                                                                     (u8 *)(&((struct ib_smp *)mad)->data));
 303                                 mlx4_ib_notify_slaves_on_guid_change(dev, bn, port_num,
 304                                                                      (u8 *)(&((struct ib_smp *)mad)->data));
 305                         }
 306                         break;
 307
 308                 case IB_SMP_ATTR_SL_TO_VL_TABLE:
 309                         /* cache sl to vl mapping changes for use in
 310                          * filling QP1 LRH VL field when sending packets
 311                          */
 312                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV &&
 313                             dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)
 314                                 return;
 315                         if (!mlx4_is_slave(dev->dev)) {
 316                                 union sl2vl_tbl_to_u64 sl2vl64;
 317                                 int jj;
 318
 319                                 for (jj = 0; jj < 8; jj++) {
 320                                         sl2vl64.sl8[jj] = ((struct ib_smp *)mad)->data[jj];
 321                                         pr_debug("port %u, sl2vl[%d] = %02x\n",
 322                                                  port_num, jj, sl2vl64.sl8[jj]);
 323                                 }
 324                                 atomic64_set(&dev->sl2vl[port_num - 1], sl2vl64.sl64);
 325                         }
 326                         break;
 327
 328                 default:
 329                         break;
 330                 }
 331 }
 332
 333 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
 334                                 int block, u32 change_bitmap)
 335 {
 336         int i, ix, slave, err;
 337         int have_event = 0;
 338
 339         for (slave = 0; slave < dev->dev->caps.sqp_demux; slave++) {
 340                 if (slave == mlx4_master_func_num(dev->dev))
 341                         continue;
 342                 if (!mlx4_is_slave_active(dev->dev, slave))
 343                         continue;
 344
 345                 have_event = 0;
 346                 for (i = 0; i < 32; i++) {
 347                         if (!(change_bitmap & (1 << i)))
 348                                 continue;
 349                         for (ix = 0;
 350                              ix < dev->dev->caps.pkey_table_len[port_num]; ix++) {
 351                                 if (dev->pkeys.virt2phys_pkey[slave][port_num - 1]
 352                                     [ix] == i + 32 * block) {
 353                                         err = mlx4_gen_pkey_eqe(dev->dev, slave, port_num);
 354                                         pr_debug("propagate_pkey_ev: slave %d,"
 355                                                  " port %d, ix %d (%d)\n",
 356                                                  slave, port_num, ix, err);
 357                                         have_event = 1;
 358                                         break;
 359                                 }
 360                         }
 361                         if (have_event)
 362                                 break;
 363                 }
 364         }
 365 }
 366
 367 static void node_desc_override(struct ib_device *dev,
 368                                struct ib_mad *mad)
 369 {
 370         unsigned long flags;
 371
 372         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 373              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 374             mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
 375             mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
 376                 spin_lock_irqsave(&to_mdev(dev)->sm_lock, flags);
 377                 memcpy(((struct ib_smp *) mad)->data, dev->node_desc,
 378                        IB_DEVICE_NODE_DESC_MAX);
 379                 spin_unlock_irqrestore(&to_mdev(dev)->sm_lock, flags);
 380         }
 381 }
 382
 383 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, const struct ib_mad *mad)
 384 {
 385         int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
 386         struct ib_mad_send_buf *send_buf;
 387         struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
 388         int ret;
 389         unsigned long flags;
 390
 391         if (agent) {
 392                 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
 393                                               IB_MGMT_MAD_DATA, GFP_ATOMIC,
 394                                               IB_MGMT_BASE_VERSION);
 395                 if (IS_ERR(send_buf))
 396                         return;
 397                 /*
 398                  * We rely here on the fact that MLX QPs don't use the
 399                  * address handle after the send is posted (this is
 400                  * wrong following the IB spec strictly, but we know
 401                  * it's OK for our devices).
 402                  */
 403                 spin_lock_irqsave(&dev->sm_lock, flags);
 404                 memcpy(send_buf->mad, mad, sizeof *mad);
 405                 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
 406                         ret = ib_post_send_mad(send_buf, NULL);
 407                 else
 408                         ret = -EINVAL;
 409                 spin_unlock_irqrestore(&dev->sm_lock, flags);
 410
 411                 if (ret)
 412                         ib_free_send_mad(send_buf);
 413         }
 414 }
 415
 416 static int mlx4_ib_demux_sa_handler(struct ib_device *ibdev, int port, int slave,
 417                                                              struct ib_sa_mad *sa_mad)
 418 {
 419         int ret = 0;
 420
 421         /* dispatch to different sa handlers */
 422         switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
 423         case IB_SA_ATTR_MC_MEMBER_REC:
 424                 ret = mlx4_ib_mcg_demux_handler(ibdev, port, slave, sa_mad);
 425                 break;
 426         default:
 427                 break;
 428         }
 429         return ret;
 430 }
 431
 432 int mlx4_ib_find_real_gid(struct ib_device *ibdev, u8 port, __be64 guid)
 433 {
 434         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 435         int i;
 436
 437         for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
 438                 if (dev->sriov.demux[port - 1].guid_cache[i] == guid)
 439                         return i;
 440         }
 441         return -1;
 442 }
 443
 444
 445 static int find_slave_port_pkey_ix(struct mlx4_ib_dev *dev, int slave,
 446                                    u8 port, u16 pkey, u16 *ix)
 447 {
 448         int i, ret;
 449         u8 unassigned_pkey_ix, pkey_ix, partial_ix = 0xFF;
 450         u16 slot_pkey;
 451
 452         if (slave == mlx4_master_func_num(dev->dev))
 453                 return ib_find_cached_pkey(&dev->ib_dev, port, pkey, ix);
 454
 455         unassigned_pkey_ix = dev->dev->phys_caps.pkey_phys_table_len[port] - 1;
 456
 457         for (i = 0; i < dev->dev->caps.pkey_table_len[port]; i++) {
 458                 if (dev->pkeys.virt2phys_pkey[slave][port - 1][i] == unassigned_pkey_ix)
 459                         continue;
 460
 461                 pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][i];
 462
 463                 ret = ib_get_cached_pkey(&dev->ib_dev, port, pkey_ix, &slot_pkey);
 464                 if (ret)
 465                         continue;
 466                 if ((slot_pkey & 0x7FFF) == (pkey & 0x7FFF)) {
 467                         if (slot_pkey & 0x8000) {
 468                                 *ix = (u16) pkey_ix;
 469                                 return 0;
 470                         } else {
 471                                 /* take first partial pkey index found */
 472                                 if (partial_ix == 0xFF)
 473                                         partial_ix = pkey_ix;
 474                         }
 475                 }
 476         }
 477
 478         if (partial_ix < 0xFF) {
 479                 *ix = (u16) partial_ix;
 480                 return 0;
 481         }
 482
 483         return -EINVAL;
 484 }
 485
 486 static int get_gids_from_l3_hdr(struct ib_grh *grh, union ib_gid *sgid,
 487                                 union ib_gid *dgid)
 488 {
 489         int version = ib_get_rdma_header_version((const union rdma_network_hdr *)grh);
 490         enum rdma_network_type net_type;
 491
 492         if (version == 4)
 493                 net_type = RDMA_NETWORK_IPV4;
 494         else if (version == 6)
 495                 net_type = RDMA_NETWORK_IPV6;
 496         else
 497                 return -EINVAL;
 498
 499         return ib_get_gids_from_rdma_hdr((union rdma_network_hdr *)grh, net_type,
 500                                          sgid, dgid);
 501 }
 502
 503 int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
 504                           enum ib_qp_type dest_qpt, struct ib_wc *wc,
 505                           struct ib_grh *grh, struct ib_mad *mad)
 506 {
 507         struct ib_sge list;
 508         struct ib_ud_wr wr;
 509         const struct ib_send_wr *bad_wr;
 510         struct mlx4_ib_demux_pv_ctx *tun_ctx;
 511         struct mlx4_ib_demux_pv_qp *tun_qp;
 512         struct mlx4_rcv_tunnel_mad *tun_mad;
 513         struct rdma_ah_attr attr;
 514         struct ib_ah *ah;
 515         struct ib_qp *src_qp = NULL;
 516         unsigned tun_tx_ix = 0;
 517         int dqpn;
 518         int ret = 0;
 519         u16 tun_pkey_ix;
 520         u16 cached_pkey;
 521         u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
 522
 523         if (dest_qpt > IB_QPT_GSI)
 524                 return -EINVAL;
 525
 526         tun_ctx = dev->sriov.demux[port-1].tun[slave];
 527
 528         /* check if proxy qp created */
 529         if (!tun_ctx || tun_ctx->state != DEMUX_PV_STATE_ACTIVE)
 530                 return -EAGAIN;
 531
 532         if (!dest_qpt)
 533                 tun_qp = &tun_ctx->qp[0];
 534         else
 535                 tun_qp = &tun_ctx->qp[1];
 536
 537         /* compute P_Key index to put in tunnel header for slave */
 538         if (dest_qpt) {
 539                 u16 pkey_ix;
 540                 ret = ib_get_cached_pkey(&dev->ib_dev, port, wc->pkey_index, &cached_pkey);
 541                 if (ret)
 542                         return -EINVAL;
 543
 544                 ret = find_slave_port_pkey_ix(dev, slave, port, cached_pkey, &pkey_ix);
 545                 if (ret)
 546                         return -EINVAL;
 547                 tun_pkey_ix = pkey_ix;
 548         } else
 549                 tun_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
 550
 551         dqpn = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave + port + (dest_qpt * 2) - 1;
 552
 553         /* get tunnel tx data buf for slave */
 554         src_qp = tun_qp->qp;
 555
 556         /* create ah. Just need an empty one with the port num for the post send.
 557          * The driver will set the force loopback bit in post_send */
 558         memset(&attr, 0, sizeof attr);
 559         attr.type = rdma_ah_find_type(&dev->ib_dev, port);
 560
 561         rdma_ah_set_port_num(&attr, port);
 562         if (is_eth) {
 563                 union ib_gid sgid;
 564                 union ib_gid dgid;
 565
 566                 if (get_gids_from_l3_hdr(grh, &sgid, &dgid))
 567                         return -EINVAL;
 568                 rdma_ah_set_grh(&attr, &dgid, 0, 0, 0, 0);
 569         }
 570         ah = rdma_create_ah(tun_ctx->pd, &attr);
 571         if (IS_ERR(ah))
 572                 return -ENOMEM;
 573
 574         /* allocate tunnel tx buf after pass failure returns */
 575         spin_lock(&tun_qp->tx_lock);
 576         if (tun_qp->tx_ix_head - tun_qp->tx_ix_tail >=
 577             (MLX4_NUM_TUNNEL_BUFS - 1))
 578                 ret = -EAGAIN;
 579         else
 580                 tun_tx_ix = (++tun_qp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
 581         spin_unlock(&tun_qp->tx_lock);
 582         if (ret)
 583                 goto end;
 584
 585         tun_mad = (struct mlx4_rcv_tunnel_mad *) (tun_qp->tx_ring[tun_tx_ix].buf.addr);
 586         if (tun_qp->tx_ring[tun_tx_ix].ah)
 587                 rdma_destroy_ah(tun_qp->tx_ring[tun_tx_ix].ah);
 588         tun_qp->tx_ring[tun_tx_ix].ah = ah;
 589         ib_dma_sync_single_for_cpu(&dev->ib_dev,
 590                                    tun_qp->tx_ring[tun_tx_ix].buf.map,
 591                                    sizeof (struct mlx4_rcv_tunnel_mad),
 592                                    DMA_TO_DEVICE);
 593
 594         /* copy over to tunnel buffer */
 595         if (grh)
 596                 memcpy(&tun_mad->grh, grh, sizeof *grh);
 597         memcpy(&tun_mad->mad, mad, sizeof *mad);
 598
 599         /* adjust tunnel data */
 600         tun_mad->hdr.pkey_index = cpu_to_be16(tun_pkey_ix);
 601         tun_mad->hdr.flags_src_qp = cpu_to_be32(wc->src_qp & 0xFFFFFF);
 602         tun_mad->hdr.g_ml_path = (grh && (wc->wc_flags & IB_WC_GRH)) ? 0x80 : 0;
 603
 604         if (is_eth) {
 605                 u16 vlan = 0;
 606                 if (mlx4_get_slave_default_vlan(dev->dev, port, slave, &vlan,
 607                                                 NULL)) {
 608                         /* VST mode */
 609                         if (vlan != wc->vlan_id)
 610                                 /* Packet vlan is not the VST-assigned vlan.
 611                                  * Drop the packet.
 612                                  */
 613                                 goto out;
 614                          else
 615                                 /* Remove the vlan tag before forwarding
 616                                  * the packet to the VF.
 617                                  */
 618                                 vlan = 0xffff;
 619                 } else {
 620                         vlan = wc->vlan_id;
 621                 }
 622
 623                 tun_mad->hdr.sl_vid = cpu_to_be16(vlan);
 624                 memcpy((char *)&tun_mad->hdr.mac_31_0, &(wc->smac[0]), 4);
 625                 memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2);
 626         } else {
 627                 tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12);
 628                 tun_mad->hdr.slid_mac_47_32 = ib_lid_be16(wc->slid);
 629         }
 630
 631         ib_dma_sync_single_for_device(&dev->ib_dev,
 632                                       tun_qp->tx_ring[tun_tx_ix].buf.map,
 633                                       sizeof (struct mlx4_rcv_tunnel_mad),
 634                                       DMA_TO_DEVICE);
 635
 636         list.addr = tun_qp->tx_ring[tun_tx_ix].buf.map;
 637         list.length = sizeof (struct mlx4_rcv_tunnel_mad);
 638         list.lkey = tun_ctx->pd->local_dma_lkey;
 639
 640         wr.ah = ah;
 641         wr.port_num = port;
 642         wr.remote_qkey = IB_QP_SET_QKEY;
 643         wr.remote_qpn = dqpn;
 644         wr.wr.next = NULL;
 645         wr.wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt);
 646         wr.wr.sg_list = &list;
 647         wr.wr.num_sge = 1;
 648         wr.wr.opcode = IB_WR_SEND;
 649         wr.wr.send_flags = IB_SEND_SIGNALED;
 650
 651         ret = ib_post_send(src_qp, &wr.wr, &bad_wr);
 652         if (!ret)
 653                 return 0;
 654  out:
 655         spin_lock(&tun_qp->tx_lock);
 656         tun_qp->tx_ix_tail++;
 657         spin_unlock(&tun_qp->tx_lock);
 658         tun_qp->tx_ring[tun_tx_ix].ah = NULL;
 659 end:
 660         rdma_destroy_ah(ah);
 661         return ret;
 662 }
 663
 664 static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port,
 665                         struct ib_wc *wc, struct ib_grh *grh,
 666                         struct ib_mad *mad)
 667 {
 668         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 669         int err, other_port;
 670         int slave = -1;
 671         u8 *slave_id;
 672         int is_eth = 0;
 673
 674         if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
 675                 is_eth = 0;
 676         else
 677                 is_eth = 1;
 678
 679         if (is_eth) {
 680                 union ib_gid dgid;
 681                 union ib_gid sgid;
 682
 683                 if (get_gids_from_l3_hdr(grh, &sgid, &dgid))
 684                         return -EINVAL;
 685                 if (!(wc->wc_flags & IB_WC_GRH)) {
 686                         mlx4_ib_warn(ibdev, "RoCE grh not present.\n");
 687                         return -EINVAL;
 688                 }
 689                 if (mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_CM) {
 690                         mlx4_ib_warn(ibdev, "RoCE mgmt class is not CM\n");
 691                         return -EINVAL;
 692                 }
 693                 err = mlx4_get_slave_from_roce_gid(dev->dev, port, dgid.raw, &slave);
 694                 if (err && mlx4_is_mf_bonded(dev->dev)) {
 695                         other_port = (port == 1) ? 2 : 1;
 696                         err = mlx4_get_slave_from_roce_gid(dev->dev, other_port, dgid.raw, &slave);
 697                         if (!err) {
 698                                 port = other_port;
 699                                 pr_debug("resolved slave %d from gid %pI6 wire port %d other %d\n",
 700                                          slave, grh->dgid.raw, port, other_port);
 701                         }
 702                 }
 703                 if (err) {
 704                         mlx4_ib_warn(ibdev, "failed matching grh\n");
 705                         return -ENOENT;
 706                 }
 707                 if (slave >= dev->dev->caps.sqp_demux) {
 708                         mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 709                                      slave, dev->dev->caps.sqp_demux);
 710                         return -ENOENT;
 711                 }
 712
 713                 if (mlx4_ib_demux_cm_handler(ibdev, port, NULL, mad))
 714                         return 0;
 715
 716                 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 717                 if (err)
 718                         pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
 719                                  slave, err);
 720                 return 0;
 721         }
 722
 723         /* Initially assume that this mad is for us */
 724         slave = mlx4_master_func_num(dev->dev);
 725
 726         /* See if the slave id is encoded in a response mad */
 727         if (mad->mad_hdr.method & 0x80) {
 728                 slave_id = (u8 *) &mad->mad_hdr.tid;
 729                 slave = *slave_id;
 730                 if (slave != 255) /*255 indicates the dom0*/
 731                         *slave_id = 0; /* remap tid */
 732         }
 733
 734         /* If a grh is present, we demux according to it */
 735         if (wc->wc_flags & IB_WC_GRH) {
 736                 if (grh->dgid.global.interface_id ==
 737                         cpu_to_be64(IB_SA_WELL_KNOWN_GUID) &&
 738                     grh->dgid.global.subnet_prefix == cpu_to_be64(
 739                         atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix))) {
 740                         slave = 0;
 741                 } else {
 742                         slave = mlx4_ib_find_real_gid(ibdev, port,
 743                                                       grh->dgid.global.interface_id);
 744                         if (slave < 0) {
 745                                 mlx4_ib_warn(ibdev, "failed matching grh\n");
 746                                 return -ENOENT;
 747                         }
 748                 }
 749         }
 750         /* Class-specific handling */
 751         switch (mad->mad_hdr.mgmt_class) {
 752         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
 753         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
 754                 /* 255 indicates the dom0 */
 755                 if (slave != 255 && slave != mlx4_master_func_num(dev->dev)) {
 756                         if (!mlx4_vf_smi_enabled(dev->dev, slave, port))
 757                                 return -EPERM;
 758                         /* for a VF. drop unsolicited MADs */
 759                         if (!(mad->mad_hdr.method & IB_MGMT_METHOD_RESP)) {
 760                                 mlx4_ib_warn(ibdev, "demux QP0. rejecting unsolicited mad for slave %d class 0x%x, method 0x%x\n",
 761                                              slave, mad->mad_hdr.mgmt_class,
 762                                              mad->mad_hdr.method);
 763                                 return -EINVAL;
 764                         }
 765                 }
 766                 break;
 767         case IB_MGMT_CLASS_SUBN_ADM:
 768                 if (mlx4_ib_demux_sa_handler(ibdev, port, slave,
 769                                              (struct ib_sa_mad *) mad))
 770                         return 0;
 771                 break;
 772         case IB_MGMT_CLASS_CM:
 773                 if (mlx4_ib_demux_cm_handler(ibdev, port, &slave, mad))
 774                         return 0;
 775                 break;
 776         case IB_MGMT_CLASS_DEVICE_MGMT:
 777                 if (mad->mad_hdr.method != IB_MGMT_METHOD_GET_RESP)
 778                         return 0;
 779                 break;
 780         default:
 781                 /* Drop unsupported classes for slaves in tunnel mode */
 782                 if (slave != mlx4_master_func_num(dev->dev)) {
 783                         pr_debug("dropping unsupported ingress mad from class:%d "
 784                                  "for slave:%d\n", mad->mad_hdr.mgmt_class, slave);
 785                         return 0;
 786                 }
 787         }
 788         /*make sure that no slave==255 was not handled yet.*/
 789         if (slave >= dev->dev->caps.sqp_demux) {
 790                 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 791                              slave, dev->dev->caps.sqp_demux);
 792                 return -ENOENT;
 793         }
 794
 795         err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 796         if (err)
 797                 pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
 798                          slave, err);
 799         return 0;
 800 }
 801
 802 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 803                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 804                         const struct ib_mad *in_mad, struct ib_mad *out_mad)
 805 {
 806         u16 slid, prev_lid = 0;
 807         int err;
 808         struct ib_port_attr pattr;
 809
 810         if (in_wc && in_wc->qp->qp_num) {
 811                 pr_debug("received MAD: slid:%d sqpn:%d "
 812                         "dlid_bits:%d dqpn:%d wc_flags:0x%x, cls %x, mtd %x, atr %x\n",
 813                         in_wc->slid, in_wc->src_qp,
 814                         in_wc->dlid_path_bits,
 815                         in_wc->qp->qp_num,
 816                         in_wc->wc_flags,
 817                         in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method,
 818                         be16_to_cpu(in_mad->mad_hdr.attr_id));
 819                 if (in_wc->wc_flags & IB_WC_GRH) {
 820                         pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n",
 821                                  be64_to_cpu(in_grh->sgid.global.subnet_prefix),
 822                                  be64_to_cpu(in_grh->sgid.global.interface_id));
 823                         pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n",
 824                                  be64_to_cpu(in_grh->dgid.global.subnet_prefix),
 825                                  be64_to_cpu(in_grh->dgid.global.interface_id));
 826                 }
 827         }
 828
 829         slid = in_wc ? ib_lid_cpu16(in_wc->slid) : be16_to_cpu(IB_LID_PERMISSIVE);
 830
 831         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
 832                 forward_trap(to_mdev(ibdev), port_num, in_mad);
 833                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 834         }
 835
 836         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 837             in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
 838                 if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
 839                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
 840                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
 841                         return IB_MAD_RESULT_SUCCESS;
 842
 843                 /*
 844                  * Don't process SMInfo queries -- the SMA can't handle them.
 845                  */
 846                 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
 847                         return IB_MAD_RESULT_SUCCESS;
 848         } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
 849                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1   ||
 850                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2   ||
 851                    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
 852                 if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
 853                     in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
 854                         return IB_MAD_RESULT_SUCCESS;
 855         } else
 856                 return IB_MAD_RESULT_SUCCESS;
 857
 858         if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 859              in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 860             in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
 861             in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
 862             !ib_query_port(ibdev, port_num, &pattr))
 863                 prev_lid = ib_lid_cpu16(pattr.lid);
 864
 865         err = mlx4_MAD_IFC(to_mdev(ibdev),
 866                            (mad_flags & IB_MAD_IGNORE_MKEY ? MLX4_MAD_IFC_IGNORE_MKEY : 0) |
 867                            (mad_flags & IB_MAD_IGNORE_BKEY ? MLX4_MAD_IFC_IGNORE_BKEY : 0) |
 868                            MLX4_MAD_IFC_NET_VIEW,
 869                            port_num, in_wc, in_grh, in_mad, out_mad);
 870         if (err)
 871                 return IB_MAD_RESULT_FAILURE;
 872
 873         if (!out_mad->mad_hdr.status) {
 874                 smp_snoop(ibdev, port_num, in_mad, prev_lid);
 875                 /* slaves get node desc from FW */
 876                 if (!mlx4_is_slave(to_mdev(ibdev)->dev))
 877                         node_desc_override(ibdev, out_mad);
 878         }
 879
 880         /* set return bit in status of directed route responses */
 881         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
 882                 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
 883
 884         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
 885                 /* no response for trap repress */
 886                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 887
 888         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 889 }
 890
 891 static void edit_counter(struct mlx4_counter *cnt, void *counters,
 892                          __be16 attr_id)
 893 {
 894         switch (attr_id) {
 895         case IB_PMA_PORT_COUNTERS:
 896         {
 897                 struct ib_pma_portcounters *pma_cnt =
 898                         (struct ib_pma_portcounters *)counters;
 899
 900                 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_data,
 901                                      (be64_to_cpu(cnt->tx_bytes) >> 2));
 902                 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_data,
 903                                      (be64_to_cpu(cnt->rx_bytes) >> 2));
 904                 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_packets,
 905                                      be64_to_cpu(cnt->tx_frames));
 906                 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_packets,
 907                                      be64_to_cpu(cnt->rx_frames));
 908                 break;
 909         }
 910         case IB_PMA_PORT_COUNTERS_EXT:
 911         {
 912                 struct ib_pma_portcounters_ext *pma_cnt_ext =
 913                         (struct ib_pma_portcounters_ext *)counters;
 914
 915                 pma_cnt_ext->port_xmit_data =
 916                         cpu_to_be64(be64_to_cpu(cnt->tx_bytes) >> 2);
 917                 pma_cnt_ext->port_rcv_data =
 918                         cpu_to_be64(be64_to_cpu(cnt->rx_bytes) >> 2);
 919                 pma_cnt_ext->port_xmit_packets = cnt->tx_frames;
 920                 pma_cnt_ext->port_rcv_packets = cnt->rx_frames;
 921                 break;
 922         }
 923         }
 924 }
 925
 926 static int iboe_process_mad_port_info(void *out_mad)
 927 {
 928         struct ib_class_port_info cpi = {};
 929
 930         cpi.capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
 931         memcpy(out_mad, &cpi, sizeof(cpi));
 932         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 933 }
 934
 935 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 936                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 937                         const struct ib_mad *in_mad, struct ib_mad *out_mad)
 938 {
 939         struct mlx4_counter counter_stats;
 940         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 941         struct counter_index *tmp_counter;
 942         int err = IB_MAD_RESULT_FAILURE, stats_avail = 0;
 943
 944         if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
 945                 return -EINVAL;
 946
 947         if (in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO)
 948                 return iboe_process_mad_port_info((void *)(out_mad->data + 40));
 949
 950         memset(&counter_stats, 0, sizeof(counter_stats));
 951         mutex_lock(&dev->counters_table[port_num - 1].mutex);
 952         list_for_each_entry(tmp_counter,
 953                             &dev->counters_table[port_num - 1].counters_list,
 954                             list) {
 955                 err = mlx4_get_counter_stats(dev->dev,
 956                                              tmp_counter->index,
 957                                              &counter_stats, 0);
 958                 if (err) {
 959                         err = IB_MAD_RESULT_FAILURE;
 960                         stats_avail = 0;
 961                         break;
 962                 }
 963                 stats_avail = 1;
 964         }
 965         mutex_unlock(&dev->counters_table[port_num - 1].mutex);
 966         if (stats_avail) {
 967                 memset(out_mad->data, 0, sizeof out_mad->data);
 968                 switch (counter_stats.counter_mode & 0xf) {
 969                 case 0:
 970                         edit_counter(&counter_stats,
 971                                      (void *)(out_mad->data + 40),
 972                                      in_mad->mad_hdr.attr_id);
 973                         err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 974                         break;
 975                 default:
 976                         err = IB_MAD_RESULT_FAILURE;
 977                 }
 978         }
 979
 980         return err;
 981 }
 982
 983 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 984                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 985                         const struct ib_mad_hdr *in, size_t in_mad_size,
 986                         struct ib_mad_hdr *out, size_t *out_mad_size,
 987                         u16 *out_mad_pkey_index)
 988 {
 989         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 990         const struct ib_mad *in_mad = (const struct ib_mad *)in;
 991         struct ib_mad *out_mad = (struct ib_mad *)out;
 992         enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num);
 993
 994         if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
 995                          *out_mad_size != sizeof(*out_mad)))
 996                 return IB_MAD_RESULT_FAILURE;
 997
 998         /* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA
 999          * queries, should be called only by VFs and for that specific purpose
1000          */
1001         if (link == IB_LINK_LAYER_INFINIBAND) {
1002                 if (mlx4_is_slave(dev->dev) &&
1003                     (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT &&
1004                      (in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS ||
1005                       in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT ||
1006                       in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO)))
1007                         return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
1008                                                 in_grh, in_mad, out_mad);
1009
1010                 return ib_process_mad(ibdev, mad_flags, port_num, in_wc,
1011                                       in_grh, in_mad, out_mad);
1012         }
1013
1014         if (link == IB_LINK_LAYER_ETHERNET)
1015                 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
1016                                         in_grh, in_mad, out_mad);
1017
1018         return -EINVAL;
1019 }
1020
1021 static void send_handler(struct ib_mad_agent *agent,
1022                          struct ib_mad_send_wc *mad_send_wc)
1023 {
1024         if (mad_send_wc->send_buf->context[0])
1025                 rdma_destroy_ah(mad_send_wc->send_buf->context[0]);
1026         ib_free_send_mad(mad_send_wc->send_buf);
1027 }
1028
1029 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
1030 {
1031         struct ib_mad_agent *agent;
1032         int p, q;
1033         int ret;
1034         enum rdma_link_layer ll;
1035
1036         for (p = 0; p < dev->num_ports; ++p) {
1037                 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1);
1038                 for (q = 0; q <= 1; ++q) {
1039                         if (ll == IB_LINK_LAYER_INFINIBAND) {
1040                                 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
1041                                                               q ? IB_QPT_GSI : IB_QPT_SMI,
1042                                                               NULL, 0, send_handler,
1043                                                               NULL, NULL, 0);
1044                                 if (IS_ERR(agent)) {
1045                                         ret = PTR_ERR(agent);
1046                                         goto err;
1047                                 }
1048                                 dev->send_agent[p][q] = agent;
1049                         } else
1050                                 dev->send_agent[p][q] = NULL;
1051                 }
1052         }
1053
1054         return 0;
1055
1056 err:
1057         for (p = 0; p < dev->num_ports; ++p)
1058                 for (q = 0; q <= 1; ++q)
1059                         if (dev->send_agent[p][q])
1060                                 ib_unregister_mad_agent(dev->send_agent[p][q]);
1061
1062         return ret;
1063 }
1064
1065 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
1066 {
1067         struct ib_mad_agent *agent;
1068         int p, q;
1069
1070         for (p = 0; p < dev->num_ports; ++p) {
1071                 for (q = 0; q <= 1; ++q) {
1072                         agent = dev->send_agent[p][q];
1073                         if (agent) {
1074                                 dev->send_agent[p][q] = NULL;
1075                                 ib_unregister_mad_agent(agent);
1076                         }
1077                 }
1078
1079                 if (dev->sm_ah[p])
1080                         rdma_destroy_ah(dev->sm_ah[p]);
1081         }
1082 }
1083
1084 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num)
1085 {
1086         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_LID_CHANGE);
1087
1088         if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
1089                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
1090                                             MLX4_EQ_PORT_INFO_LID_CHANGE_MASK);
1091 }
1092
1093 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num)
1094 {
1095         /* re-configure the alias-guid and mcg's */
1096         if (mlx4_is_master(dev->dev)) {
1097                 mlx4_ib_invalidate_all_guid_record(dev, port_num);
1098
1099                 if (!dev->sriov.is_going_down) {
1100                         mlx4_ib_mcg_port_cleanup(&dev->sriov.demux[port_num - 1], 0);
1101                         mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
1102                                                     MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK);
1103                 }
1104         }
1105
1106         /* Update the sl to vl table from inside client rereg
1107          * only if in secure-host mode (snooping is not possible)
1108          * and the sl-to-vl change event is not generated by FW.
1109          */
1110         if (!mlx4_is_slave(dev->dev) &&
1111             dev->dev->flags & MLX4_FLAG_SECURE_HOST &&
1112             !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)) {
1113                 if (mlx4_is_master(dev->dev))
1114                         /* already in work queue from mlx4_ib_event queueing
1115                          * mlx4_handle_port_mgmt_change_event, which calls
1116                          * this procedure. Therefore, call sl2vl_update directly.
1117                          */
1118                         mlx4_ib_sl2vl_update(dev, port_num);
1119                 else
1120                         mlx4_sched_ib_sl2vl_update_work(dev, port_num);
1121         }
1122         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_CLIENT_REREGISTER);
1123 }
1124
1125 static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
1126                               struct mlx4_eqe *eqe)
1127 {
1128         __propagate_pkey_ev(dev, port_num, GET_BLK_PTR_FROM_EQE(eqe),
1129                             GET_MASK_FROM_EQE(eqe));
1130 }
1131
1132 static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num,
1133                                       u32 guid_tbl_blk_num, u32 change_bitmap)
1134 {
1135         struct ib_smp *in_mad  = NULL;
1136         struct ib_smp *out_mad  = NULL;
1137         u16 i;
1138
1139         if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev))
1140                 return;
1141
1142         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
1143         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1144         if (!in_mad || !out_mad)
1145                 goto out;
1146
1147         guid_tbl_blk_num  *= 4;
1148
1149         for (i = 0; i < 4; i++) {
1150                 if (change_bitmap && (!((change_bitmap >> (8 * i)) & 0xff)))
1151                         continue;
1152                 memset(in_mad, 0, sizeof *in_mad);
1153                 memset(out_mad, 0, sizeof *out_mad);
1154
1155                 in_mad->base_version  = 1;
1156                 in_mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
1157                 in_mad->class_version = 1;
1158                 in_mad->method        = IB_MGMT_METHOD_GET;
1159                 in_mad->attr_id       = IB_SMP_ATTR_GUID_INFO;
1160                 in_mad->attr_mod      = cpu_to_be32(guid_tbl_blk_num + i);
1161
1162                 if (mlx4_MAD_IFC(dev,
1163                                  MLX4_MAD_IFC_IGNORE_KEYS | MLX4_MAD_IFC_NET_VIEW,
1164                                  port_num, NULL, NULL, in_mad, out_mad)) {
1165                         mlx4_ib_warn(&dev->ib_dev, "Failed in get GUID INFO MAD_IFC\n");
1166                         goto out;
1167                 }
1168
1169                 mlx4_ib_update_cache_on_guid_change(dev, guid_tbl_blk_num + i,
1170                                                     port_num,
1171                                                     (u8 *)(&((struct ib_smp *)out_mad)->data));
1172                 mlx4_ib_notify_slaves_on_guid_change(dev, guid_tbl_blk_num + i,
1173                                                      port_num,
1174                                                      (u8 *)(&((struct ib_smp *)out_mad)->data));
1175         }
1176
1177 out:
1178         kfree(in_mad);
1179         kfree(out_mad);
1180         return;
1181 }
1182
1183 void handle_port_mgmt_change_event(struct work_struct *work)
1184 {
1185         struct ib_event_work *ew = container_of(work, struct ib_event_work, work);
1186         struct mlx4_ib_dev *dev = ew->ib_dev;
1187         struct mlx4_eqe *eqe = &(ew->ib_eqe);
1188         u8 port = eqe->event.port_mgmt_change.port;
1189         u32 changed_attr;
1190         u32 tbl_block;
1191         u32 change_bitmap;
1192
1193         switch (eqe->subtype) {
1194         case MLX4_DEV_PMC_SUBTYPE_PORT_INFO:
1195                 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr);
1196
1197                 /* Update the SM ah - This should be done before handling
1198                    the other changed attributes so that MADs can be sent to the SM */
1199                 if (changed_attr & MSTR_SM_CHANGE_MASK) {
1200                         u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid);
1201                         u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf;
1202                         update_sm_ah(dev, port, lid, sl);
1203                 }
1204
1205                 /* Check if it is a lid change event */
1206                 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK)
1207                         handle_lid_change_event(dev, port);
1208
1209                 /* Generate GUID changed event */
1210                 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) {
1211                         if (mlx4_is_master(dev->dev)) {
1212                                 union ib_gid gid;
1213                                 int err = 0;
1214
1215                                 if (!eqe->event.port_mgmt_change.params.port_info.gid_prefix)
1216                                         err = __mlx4_ib_query_gid(&dev->ib_dev, port, 0, &gid, 1);
1217                                 else
1218                                         gid.global.subnet_prefix =
1219                                                 eqe->event.port_mgmt_change.params.port_info.gid_prefix;
1220                                 if (err) {
1221                                         pr_warn("Could not change QP1 subnet prefix for port %d: query_gid error (%d)\n",
1222                                                 port, err);
1223                                 } else {
1224                                         pr_debug("Changing QP1 subnet prefix for port %d. old=0x%llx. new=0x%llx\n",
1225                                                  port,
1226                                                  (u64)atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix),
1227                                                  be64_to_cpu(gid.global.subnet_prefix));
1228                                         atomic64_set(&dev->sriov.demux[port - 1].subnet_prefix,
1229                                                      be64_to_cpu(gid.global.subnet_prefix));
1230                                 }
1231                         }
1232                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1233                         /*if master, notify all slaves*/
1234                         if (mlx4_is_master(dev->dev))
1235                                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port,
1236                                                             MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK);
1237                 }
1238
1239                 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK)
1240                         handle_client_rereg_event(dev, port);
1241                 break;
1242
1243         case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE:
1244                 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE);
1245                 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
1246                         propagate_pkey_ev(dev, port, eqe);
1247                 break;
1248         case MLX4_DEV_PMC_SUBTYPE_GUID_INFO:
1249                 /* paravirtualized master's guid is guid 0 -- does not change */
1250                 if (!mlx4_is_master(dev->dev))
1251                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1252                 /*if master, notify relevant slaves*/
1253                 else if (!dev->sriov.is_going_down) {
1254                         tbl_block = GET_BLK_PTR_FROM_EQE(eqe);
1255                         change_bitmap = GET_MASK_FROM_EQE(eqe);
1256                         handle_slaves_guid_change(dev, port, tbl_block, change_bitmap);
1257                 }
1258                 break;
1259
1260         case MLX4_DEV_PMC_SUBTYPE_SL_TO_VL_MAP:
1261                 /* cache sl to vl mapping changes for use in
1262                  * filling QP1 LRH VL field when sending packets
1263                  */
1264                 if (!mlx4_is_slave(dev->dev)) {
1265                         union sl2vl_tbl_to_u64 sl2vl64;
1266                         int jj;
1267
1268                         for (jj = 0; jj < 8; jj++) {
1269                                 sl2vl64.sl8[jj] =
1270                                         eqe->event.port_mgmt_change.params.sl2vl_tbl_change_info.sl2vl_table[jj];
1271                                 pr_debug("port %u, sl2vl[%d] = %02x\n",
1272                                          port, jj, sl2vl64.sl8[jj]);
1273                         }
1274                         atomic64_set(&dev->sl2vl[port - 1], sl2vl64.sl64);
1275                 }
1276                 break;
1277         default:
1278                 pr_warn("Unsupported subtype 0x%x for "
1279                         "Port Management Change event\n", eqe->subtype);
1280         }
1281
1282         kfree(ew);
1283 }
1284
1285 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num,
1286                             enum ib_event_type type)
1287 {
1288         struct ib_event event;
1289
1290         event.device            = &dev->ib_dev;
1291         event.element.port_num  = port_num;
1292         event.event             = type;
1293
1294         ib_dispatch_event(&event);
1295 }
1296
1297 static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg)
1298 {
1299         unsigned long flags;
1300         struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context;
1301         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1302         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
1303         if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE)
1304                 queue_work(ctx->wq, &ctx->work);
1305         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
1306 }
1307
1308 static void mlx4_ib_wire_comp_handler(struct ib_cq *cq, void *arg)
1309 {
1310         unsigned long flags;
1311         struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context;
1312         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1313
1314         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
1315         if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE)
1316                 queue_work(ctx->wi_wq, &ctx->work);
1317         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
1318 }
1319
1320 static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx,
1321                                   struct mlx4_ib_demux_pv_qp *tun_qp,
1322                                   int index)
1323 {
1324         struct ib_sge sg_list;
1325         struct ib_recv_wr recv_wr;
1326         const struct ib_recv_wr *bad_recv_wr;
1327         int size;
1328
1329         size = (tun_qp->qp->qp_type == IB_QPT_UD) ?
1330                 sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf);
1331
1332         sg_list.addr = tun_qp->ring[index].map;
1333         sg_list.length = size;
1334         sg_list.lkey = ctx->pd->local_dma_lkey;
1335
1336         recv_wr.next = NULL;
1337         recv_wr.sg_list = &sg_list;
1338         recv_wr.num_sge = 1;
1339         recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV |
1340                 MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt);
1341         ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map,
1342                                       size, DMA_FROM_DEVICE);
1343         return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr);
1344 }
1345
1346 static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port,
1347                 int slave, struct ib_sa_mad *sa_mad)
1348 {
1349         int ret = 0;
1350
1351         /* dispatch to different sa handlers */
1352         switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
1353         case IB_SA_ATTR_MC_MEMBER_REC:
1354                 ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad);
1355                 break;
1356         default:
1357                 break;
1358         }
1359         return ret;
1360 }
1361
1362 static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave)
1363 {
1364         int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave;
1365
1366         return (qpn >= proxy_start && qpn <= proxy_start + 1);
1367 }
1368
1369
1370 int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u8 port,
1371                          enum ib_qp_type dest_qpt, u16 pkey_index,
1372                          u32 remote_qpn, u32 qkey, struct rdma_ah_attr *attr,
1373                          u8 *s_mac, u16 vlan_id, struct ib_mad *mad)
1374 {
1375         struct ib_sge list;
1376         struct ib_ud_wr wr;
1377         const struct ib_send_wr *bad_wr;
1378         struct mlx4_ib_demux_pv_ctx *sqp_ctx;
1379         struct mlx4_ib_demux_pv_qp *sqp;
1380         struct mlx4_mad_snd_buf *sqp_mad;
1381         struct ib_ah *ah;
1382         struct ib_qp *send_qp = NULL;
1383         unsigned wire_tx_ix = 0;
1384         int ret = 0;
1385         u16 wire_pkey_ix;
1386         int src_qpnum;
1387
1388         sqp_ctx = dev->sriov.sqps[port-1];
1389
1390         /* check if proxy qp created */
1391         if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE)
1392                 return -EAGAIN;
1393
1394         if (dest_qpt == IB_QPT_SMI) {
1395                 src_qpnum = 0;
1396                 sqp = &sqp_ctx->qp[0];
1397                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
1398         } else {
1399                 src_qpnum = 1;
1400                 sqp = &sqp_ctx->qp[1];
1401                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index];
1402         }
1403
1404         send_qp = sqp->qp;
1405
1406         /* create ah */
1407         ah = mlx4_ib_create_ah_slave(sqp_ctx->pd, attr,
1408                                      rdma_ah_retrieve_grh(attr)->sgid_index,
1409                                      s_mac, vlan_id);
1410         if (IS_ERR(ah))
1411                 return -ENOMEM;
1412         spin_lock(&sqp->tx_lock);
1413         if (sqp->tx_ix_head - sqp->tx_ix_tail >=
1414             (MLX4_NUM_TUNNEL_BUFS - 1))
1415                 ret = -EAGAIN;
1416         else
1417                 wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
1418         spin_unlock(&sqp->tx_lock);
1419         if (ret)
1420                 goto out;
1421
1422         sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr);
1423         if (sqp->tx_ring[wire_tx_ix].ah)
1424                 rdma_destroy_ah(sqp->tx_ring[wire_tx_ix].ah);
1425         sqp->tx_ring[wire_tx_ix].ah = ah;
1426         ib_dma_sync_single_for_cpu(&dev->ib_dev,
1427                                    sqp->tx_ring[wire_tx_ix].buf.map,
1428                                    sizeof (struct mlx4_mad_snd_buf),
1429                                    DMA_TO_DEVICE);
1430
1431         memcpy(&sqp_mad->payload, mad, sizeof *mad);
1432
1433         ib_dma_sync_single_for_device(&dev->ib_dev,
1434                                       sqp->tx_ring[wire_tx_ix].buf.map,
1435                                       sizeof (struct mlx4_mad_snd_buf),
1436                                       DMA_TO_DEVICE);
1437
1438         list.addr = sqp->tx_ring[wire_tx_ix].buf.map;
1439         list.length = sizeof (struct mlx4_mad_snd_buf);
1440         list.lkey = sqp_ctx->pd->local_dma_lkey;
1441
1442         wr.ah = ah;
1443         wr.port_num = port;
1444         wr.pkey_index = wire_pkey_ix;
1445         wr.remote_qkey = qkey;
1446         wr.remote_qpn = remote_qpn;
1447         wr.wr.next = NULL;
1448         wr.wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum);
1449         wr.wr.sg_list = &list;
1450         wr.wr.num_sge = 1;
1451         wr.wr.opcode = IB_WR_SEND;
1452         wr.wr.send_flags = IB_SEND_SIGNALED;
1453
1454         ret = ib_post_send(send_qp, &wr.wr, &bad_wr);
1455         if (!ret)
1456                 return 0;
1457
1458         spin_lock(&sqp->tx_lock);
1459         sqp->tx_ix_tail++;
1460         spin_unlock(&sqp->tx_lock);
1461         sqp->tx_ring[wire_tx_ix].ah = NULL;
1462 out:
1463         mlx4_ib_destroy_ah(ah);
1464         return ret;
1465 }
1466
1467 static int get_slave_base_gid_ix(struct mlx4_ib_dev *dev, int slave, int port)
1468 {
1469         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1470                 return slave;
1471         return mlx4_get_base_gid_ix(dev->dev, slave, port);
1472 }
1473
1474 static void fill_in_real_sgid_index(struct mlx4_ib_dev *dev, int slave, int port,
1475                                     struct rdma_ah_attr *ah_attr)
1476 {
1477         struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);
1478         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1479                 grh->sgid_index = slave;
1480         else
1481                 grh->sgid_index += get_slave_base_gid_ix(dev, slave, port);
1482 }
1483
1484 static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc)
1485 {
1486         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1487         struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)];
1488         int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1);
1489         struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr;
1490         struct mlx4_ib_ah ah;
1491         struct rdma_ah_attr ah_attr;
1492         u8 *slave_id;
1493         int slave;
1494         int port;
1495         u16 vlan_id;
1496         u8 qos;
1497         u8 *dmac;
1498
1499         /* Get slave that sent this packet */
1500         if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn ||
1501             wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX ||
1502             (wc->src_qp & 0x1) != ctx->port - 1 ||
1503             wc->src_qp & 0x4) {
1504                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp);
1505                 return;
1506         }
1507         slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8;
1508         if (slave != ctx->slave) {
1509                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: "
1510                              "belongs to another slave\n", wc->src_qp);
1511                 return;
1512         }
1513
1514         /* Map transaction ID */
1515         ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map,
1516                                    sizeof (struct mlx4_tunnel_mad),
1517                                    DMA_FROM_DEVICE);
1518         switch (tunnel->mad.mad_hdr.method) {
1519         case IB_MGMT_METHOD_SET:
1520         case IB_MGMT_METHOD_GET:
1521         case IB_MGMT_METHOD_REPORT:
1522         case IB_SA_METHOD_GET_TABLE:
1523         case IB_SA_METHOD_DELETE:
1524         case IB_SA_METHOD_GET_MULTI:
1525         case IB_SA_METHOD_GET_TRACE_TBL:
1526                 slave_id = (u8 *) &tunnel->mad.mad_hdr.tid;
1527                 if (*slave_id) {
1528                         mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d "
1529                                      "class:%d slave:%d\n", *slave_id,
1530                                      tunnel->mad.mad_hdr.mgmt_class, slave);
1531                         return;
1532                 } else
1533                         *slave_id = slave;
1534         default:
1535                 /* nothing */;
1536         }
1537
1538         /* Class-specific handling */
1539         switch (tunnel->mad.mad_hdr.mgmt_class) {
1540         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1541         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1542                 if (slave != mlx4_master_func_num(dev->dev) &&
1543                     !mlx4_vf_smi_enabled(dev->dev, slave, ctx->port))
1544                         return;
1545                 break;
1546         case IB_MGMT_CLASS_SUBN_ADM:
1547                 if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave,
1548                               (struct ib_sa_mad *) &tunnel->mad))
1549                         return;
1550                 break;
1551         case IB_MGMT_CLASS_CM:
1552                 if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave,
1553                               (struct ib_mad *) &tunnel->mad))
1554                         return;
1555                 break;
1556         case IB_MGMT_CLASS_DEVICE_MGMT:
1557                 if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET &&
1558                     tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET)
1559                         return;
1560                 break;
1561         default:
1562                 /* Drop unsupported classes for slaves in tunnel mode */
1563                 if (slave != mlx4_master_func_num(dev->dev)) {
1564                         mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d "
1565                                      "for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave);
1566                         return;
1567                 }
1568         }
1569
1570         /* We are using standard ib_core services to send the mad, so generate a
1571          * stadard address handle by decoding the tunnelled mlx4_ah fields */
1572         memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av));
1573         ah.ibah.device = ctx->ib_dev;
1574
1575         port = be32_to_cpu(ah.av.ib.port_pd) >> 24;
1576         port = mlx4_slave_convert_port(dev->dev, slave, port);
1577         if (port < 0)
1578                 return;
1579         ah.av.ib.port_pd = cpu_to_be32(port << 24 | (be32_to_cpu(ah.av.ib.port_pd) & 0xffffff));
1580         ah.ibah.type = rdma_ah_find_type(&dev->ib_dev, port);
1581
1582         mlx4_ib_query_ah(&ah.ibah, &ah_attr);
1583         if (rdma_ah_get_ah_flags(&ah_attr) & IB_AH_GRH)
1584                 fill_in_real_sgid_index(dev, slave, ctx->port, &ah_attr);
1585         dmac = rdma_ah_retrieve_dmac(&ah_attr);
1586         if (dmac)
1587                 memcpy(dmac, tunnel->hdr.mac, ETH_ALEN);
1588         vlan_id = be16_to_cpu(tunnel->hdr.vlan);
1589         /* if slave have default vlan use it */
1590         if (mlx4_get_slave_default_vlan(dev->dev, ctx->port, slave,
1591                                         &vlan_id, &qos))
1592                 rdma_ah_set_sl(&ah_attr, qos);
1593
1594         mlx4_ib_send_to_wire(dev, slave, ctx->port,
1595                              is_proxy_qp0(dev, wc->src_qp, slave) ?
1596                              IB_QPT_SMI : IB_QPT_GSI,
1597                              be16_to_cpu(tunnel->hdr.pkey_index),
1598                              be32_to_cpu(tunnel->hdr.remote_qpn),
1599                              be32_to_cpu(tunnel->hdr.qkey),
1600                              &ah_attr, wc->smac, vlan_id, &tunnel->mad);
1601 }
1602
1603 static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1604                                  enum ib_qp_type qp_type, int is_tun)
1605 {
1606         int i;
1607         struct mlx4_ib_demux_pv_qp *tun_qp;
1608         int rx_buf_size, tx_buf_size;
1609
1610         if (qp_type > IB_QPT_GSI)
1611                 return -EINVAL;
1612
1613         tun_qp = &ctx->qp[qp_type];
1614
1615         tun_qp->ring = kcalloc(MLX4_NUM_TUNNEL_BUFS,
1616                                sizeof(struct mlx4_ib_buf),
1617                                GFP_KERNEL);
1618         if (!tun_qp->ring)
1619                 return -ENOMEM;
1620
1621         tun_qp->tx_ring = kcalloc(MLX4_NUM_TUNNEL_BUFS,
1622                                   sizeof (struct mlx4_ib_tun_tx_buf),
1623                                   GFP_KERNEL);
1624         if (!tun_qp->tx_ring) {
1625                 kfree(tun_qp->ring);
1626                 tun_qp->ring = NULL;
1627                 return -ENOMEM;
1628         }
1629
1630         if (is_tun) {
1631                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1632                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1633         } else {
1634                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1635                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1636         }
1637
1638         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1639                 tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL);
1640                 if (!tun_qp->ring[i].addr)
1641                         goto err;
1642                 tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev,
1643                                                         tun_qp->ring[i].addr,
1644                                                         rx_buf_size,
1645                                                         DMA_FROM_DEVICE);
1646                 if (ib_dma_mapping_error(ctx->ib_dev, tun_qp->ring[i].map)) {
1647                         kfree(tun_qp->ring[i].addr);
1648                         goto err;
1649                 }
1650         }
1651
1652         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1653                 tun_qp->tx_ring[i].buf.addr =
1654                         kmalloc(tx_buf_size, GFP_KERNEL);
1655                 if (!tun_qp->tx_ring[i].buf.addr)
1656                         goto tx_err;
1657                 tun_qp->tx_ring[i].buf.map =
1658                         ib_dma_map_single(ctx->ib_dev,
1659                                           tun_qp->tx_ring[i].buf.addr,
1660                                           tx_buf_size,
1661                                           DMA_TO_DEVICE);
1662                 if (ib_dma_mapping_error(ctx->ib_dev,
1663                                          tun_qp->tx_ring[i].buf.map)) {
1664                         kfree(tun_qp->tx_ring[i].buf.addr);
1665                         goto tx_err;
1666                 }
1667                 tun_qp->tx_ring[i].ah = NULL;
1668         }
1669         spin_lock_init(&tun_qp->tx_lock);
1670         tun_qp->tx_ix_head = 0;
1671         tun_qp->tx_ix_tail = 0;
1672         tun_qp->proxy_qpt = qp_type;
1673
1674         return 0;
1675
1676 tx_err:
1677         while (i > 0) {
1678                 --i;
1679                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1680                                     tx_buf_size, DMA_TO_DEVICE);
1681                 kfree(tun_qp->tx_ring[i].buf.addr);
1682         }
1683         i = MLX4_NUM_TUNNEL_BUFS;
1684 err:
1685         while (i > 0) {
1686                 --i;
1687                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1688                                     rx_buf_size, DMA_FROM_DEVICE);
1689                 kfree(tun_qp->ring[i].addr);
1690         }
1691         kfree(tun_qp->tx_ring);
1692         tun_qp->tx_ring = NULL;
1693         kfree(tun_qp->ring);
1694         tun_qp->ring = NULL;
1695         return -ENOMEM;
1696 }
1697
1698 static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1699                                      enum ib_qp_type qp_type, int is_tun)
1700 {
1701         int i;
1702         struct mlx4_ib_demux_pv_qp *tun_qp;
1703         int rx_buf_size, tx_buf_size;
1704
1705         if (qp_type > IB_QPT_GSI)
1706                 return;
1707
1708         tun_qp = &ctx->qp[qp_type];
1709         if (is_tun) {
1710                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1711                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1712         } else {
1713                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1714                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1715         }
1716
1717
1718         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1719                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1720                                     rx_buf_size, DMA_FROM_DEVICE);
1721                 kfree(tun_qp->ring[i].addr);
1722         }
1723
1724         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1725                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1726                                     tx_buf_size, DMA_TO_DEVICE);
1727                 kfree(tun_qp->tx_ring[i].buf.addr);
1728                 if (tun_qp->tx_ring[i].ah)
1729                         rdma_destroy_ah(tun_qp->tx_ring[i].ah);
1730         }
1731         kfree(tun_qp->tx_ring);
1732         kfree(tun_qp->ring);
1733 }
1734
1735 static void mlx4_ib_tunnel_comp_worker(struct work_struct *work)
1736 {
1737         struct mlx4_ib_demux_pv_ctx *ctx;
1738         struct mlx4_ib_demux_pv_qp *tun_qp;
1739         struct ib_wc wc;
1740         int ret;
1741         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1742         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1743
1744         while (ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1745                 tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1746                 if (wc.status == IB_WC_SUCCESS) {
1747                         switch (wc.opcode) {
1748                         case IB_WC_RECV:
1749                                 mlx4_ib_multiplex_mad(ctx, &wc);
1750                                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp,
1751                                                              wc.wr_id &
1752                                                              (MLX4_NUM_TUNNEL_BUFS - 1));
1753                                 if (ret)
1754                                         pr_err("Failed reposting tunnel "
1755                                                "buf:%lld\n", wc.wr_id);
1756                                 break;
1757                         case IB_WC_SEND:
1758                                 pr_debug("received tunnel send completion:"
1759                                          "wrid=0x%llx, status=0x%x\n",
1760                                          wc.wr_id, wc.status);
1761                                 rdma_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1762                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1763                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1764                                         = NULL;
1765                                 spin_lock(&tun_qp->tx_lock);
1766                                 tun_qp->tx_ix_tail++;
1767                                 spin_unlock(&tun_qp->tx_lock);
1768
1769                                 break;
1770                         default:
1771                                 break;
1772                         }
1773                 } else  {
1774                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1775                                  " status = %d, wrid = 0x%llx\n",
1776                                  ctx->slave, wc.status, wc.wr_id);
1777                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1778                                 rdma_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1779                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1780                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1781                                         = NULL;
1782                                 spin_lock(&tun_qp->tx_lock);
1783                                 tun_qp->tx_ix_tail++;
1784                                 spin_unlock(&tun_qp->tx_lock);
1785                         }
1786                 }
1787         }
1788 }
1789
1790 static void pv_qp_event_handler(struct ib_event *event, void *qp_context)
1791 {
1792         struct mlx4_ib_demux_pv_ctx *sqp = qp_context;
1793
1794         /* It's worse than that! He's dead, Jim! */
1795         pr_err("Fatal error (%d) on a MAD QP on port %d\n",
1796                event->event, sqp->port);
1797 }
1798
1799 static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx,
1800                             enum ib_qp_type qp_type, int create_tun)
1801 {
1802         int i, ret;
1803         struct mlx4_ib_demux_pv_qp *tun_qp;
1804         struct mlx4_ib_qp_tunnel_init_attr qp_init_attr;
1805         struct ib_qp_attr attr;
1806         int qp_attr_mask_INIT;
1807
1808         if (qp_type > IB_QPT_GSI)
1809                 return -EINVAL;
1810
1811         tun_qp = &ctx->qp[qp_type];
1812
1813         memset(&qp_init_attr, 0, sizeof qp_init_attr);
1814         qp_init_attr.init_attr.send_cq = ctx->cq;
1815         qp_init_attr.init_attr.recv_cq = ctx->cq;
1816         qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
1817         qp_init_attr.init_attr.cap.max_send_wr = MLX4_NUM_TUNNEL_BUFS;
1818         qp_init_attr.init_attr.cap.max_recv_wr = MLX4_NUM_TUNNEL_BUFS;
1819         qp_init_attr.init_attr.cap.max_send_sge = 1;
1820         qp_init_attr.init_attr.cap.max_recv_sge = 1;
1821         if (create_tun) {
1822                 qp_init_attr.init_attr.qp_type = IB_QPT_UD;
1823                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_TUNNEL_QP;
1824                 qp_init_attr.port = ctx->port;
1825                 qp_init_attr.slave = ctx->slave;
1826                 qp_init_attr.proxy_qp_type = qp_type;
1827                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX |
1828                            IB_QP_QKEY | IB_QP_PORT;
1829         } else {
1830                 qp_init_attr.init_attr.qp_type = qp_type;
1831                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_SQP;
1832                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY;
1833         }
1834         qp_init_attr.init_attr.port_num = ctx->port;
1835         qp_init_attr.init_attr.qp_context = ctx;
1836         qp_init_attr.init_attr.event_handler = pv_qp_event_handler;
1837         tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr);
1838         if (IS_ERR(tun_qp->qp)) {
1839                 ret = PTR_ERR(tun_qp->qp);
1840                 tun_qp->qp = NULL;
1841                 pr_err("Couldn't create %s QP (%d)\n",
1842                        create_tun ? "tunnel" : "special", ret);
1843                 return ret;
1844         }
1845
1846         memset(&attr, 0, sizeof attr);
1847         attr.qp_state = IB_QPS_INIT;
1848         ret = 0;
1849         if (create_tun)
1850                 ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave,
1851                                               ctx->port, IB_DEFAULT_PKEY_FULL,
1852                                               &attr.pkey_index);
1853         if (ret || !create_tun)
1854                 attr.pkey_index =
1855                         to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0];
1856         attr.qkey = IB_QP1_QKEY;
1857         attr.port_num = ctx->port;
1858         ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT);
1859         if (ret) {
1860                 pr_err("Couldn't change %s qp state to INIT (%d)\n",
1861                        create_tun ? "tunnel" : "special", ret);
1862                 goto err_qp;
1863         }
1864         attr.qp_state = IB_QPS_RTR;
1865         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE);
1866         if (ret) {
1867                 pr_err("Couldn't change %s qp state to RTR (%d)\n",
1868                        create_tun ? "tunnel" : "special", ret);
1869                 goto err_qp;
1870         }
1871         attr.qp_state = IB_QPS_RTS;
1872         attr.sq_psn = 0;
1873         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN);
1874         if (ret) {
1875                 pr_err("Couldn't change %s qp state to RTS (%d)\n",
1876                        create_tun ? "tunnel" : "special", ret);
1877                 goto err_qp;
1878         }
1879
1880         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1881                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i);
1882                 if (ret) {
1883                         pr_err(" mlx4_ib_post_pv_buf error"
1884                                " (err = %d, i = %d)\n", ret, i);
1885                         goto err_qp;
1886                 }
1887         }
1888         return 0;
1889
1890 err_qp:
1891         ib_destroy_qp(tun_qp->qp);
1892         tun_qp->qp = NULL;
1893         return ret;
1894 }
1895
1896 /*
1897  * IB MAD completion callback for real SQPs
1898  */
1899 static void mlx4_ib_sqp_comp_worker(struct work_struct *work)
1900 {
1901         struct mlx4_ib_demux_pv_ctx *ctx;
1902         struct mlx4_ib_demux_pv_qp *sqp;
1903         struct ib_wc wc;
1904         struct ib_grh *grh;
1905         struct ib_mad *mad;
1906
1907         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1908         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1909
1910         while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1911                 sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1912                 if (wc.status == IB_WC_SUCCESS) {
1913                         switch (wc.opcode) {
1914                         case IB_WC_SEND:
1915                                 rdma_destroy_ah(sqp->tx_ring[wc.wr_id &
1916                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1917                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1918                                         = NULL;
1919                                 spin_lock(&sqp->tx_lock);
1920                                 sqp->tx_ix_tail++;
1921                                 spin_unlock(&sqp->tx_lock);
1922                                 break;
1923                         case IB_WC_RECV:
1924                                 mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *)
1925                                                 (sqp->ring[wc.wr_id &
1926                                                 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->payload);
1927                                 grh = &(((struct mlx4_mad_rcv_buf *)
1928                                                 (sqp->ring[wc.wr_id &
1929                                                 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->grh);
1930                                 mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad);
1931                                 if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id &
1932                                                            (MLX4_NUM_TUNNEL_BUFS - 1)))
1933                                         pr_err("Failed reposting SQP "
1934                                                "buf:%lld\n", wc.wr_id);
1935                                 break;
1936                         default:
1937                                 break;
1938                         }
1939                 } else  {
1940                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1941                                  " status = %d, wrid = 0x%llx\n",
1942                                  ctx->slave, wc.status, wc.wr_id);
1943                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1944                                 rdma_destroy_ah(sqp->tx_ring[wc.wr_id &
1945                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1946                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1947                                         = NULL;
1948                                 spin_lock(&sqp->tx_lock);
1949                                 sqp->tx_ix_tail++;
1950                                 spin_unlock(&sqp->tx_lock);
1951                         }
1952                 }
1953         }
1954 }
1955
1956 static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port,
1957                                struct mlx4_ib_demux_pv_ctx **ret_ctx)
1958 {
1959         struct mlx4_ib_demux_pv_ctx *ctx;
1960
1961         *ret_ctx = NULL;
1962         ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL);
1963         if (!ctx)
1964                 return -ENOMEM;
1965
1966         ctx->ib_dev = &dev->ib_dev;
1967         ctx->port = port;
1968         ctx->slave = slave;
1969         *ret_ctx = ctx;
1970         return 0;
1971 }
1972
1973 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port)
1974 {
1975         if (dev->sriov.demux[port - 1].tun[slave]) {
1976                 kfree(dev->sriov.demux[port - 1].tun[slave]);
1977                 dev->sriov.demux[port - 1].tun[slave] = NULL;
1978         }
1979 }
1980
1981 static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
1982                                int create_tun, struct mlx4_ib_demux_pv_ctx *ctx)
1983 {
1984         int ret, cq_size;
1985         struct ib_cq_init_attr cq_attr = {};
1986
1987         if (ctx->state != DEMUX_PV_STATE_DOWN)
1988                 return -EEXIST;
1989
1990         ctx->state = DEMUX_PV_STATE_STARTING;
1991         /* have QP0 only if link layer is IB */
1992         if (rdma_port_get_link_layer(ibdev, ctx->port) ==
1993             IB_LINK_LAYER_INFINIBAND)
1994                 ctx->has_smi = 1;
1995
1996         if (ctx->has_smi) {
1997                 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun);
1998                 if (ret) {
1999                         pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret);
2000                         goto err_out;
2001                 }
2002         }
2003
2004         ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun);
2005         if (ret) {
2006                 pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret);
2007                 goto err_out_qp0;
2008         }
2009
2010         cq_size = 2 * MLX4_NUM_TUNNEL_BUFS;
2011         if (ctx->has_smi)
2012                 cq_size *= 2;
2013
2014         cq_attr.cqe = cq_size;
2015         ctx->cq = ib_create_cq(ctx->ib_dev,
2016                                create_tun ? mlx4_ib_tunnel_comp_handler : mlx4_ib_wire_comp_handler,
2017                                NULL, ctx, &cq_attr);
2018         if (IS_ERR(ctx->cq)) {
2019                 ret = PTR_ERR(ctx->cq);
2020                 pr_err("Couldn't create tunnel CQ (%d)\n", ret);
2021                 goto err_buf;
2022         }
2023
2024         ctx->pd = ib_alloc_pd(ctx->ib_dev, 0);
2025         if (IS_ERR(ctx->pd)) {
2026                 ret = PTR_ERR(ctx->pd);
2027                 pr_err("Couldn't create tunnel PD (%d)\n", ret);
2028                 goto err_cq;
2029         }
2030
2031         if (ctx->has_smi) {
2032                 ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun);
2033                 if (ret) {
2034                         pr_err("Couldn't create %s QP0 (%d)\n",
2035                                create_tun ? "tunnel for" : "",  ret);
2036                         goto err_pd;
2037                 }
2038         }
2039
2040         ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun);
2041         if (ret) {
2042                 pr_err("Couldn't create %s QP1 (%d)\n",
2043                        create_tun ? "tunnel for" : "",  ret);
2044                 goto err_qp0;
2045         }
2046
2047         if (create_tun)
2048                 INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker);
2049         else
2050                 INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker);
2051
2052         ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq;
2053         ctx->wi_wq = to_mdev(ibdev)->sriov.demux[port - 1].wi_wq;
2054
2055         ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
2056         if (ret) {
2057                 pr_err("Couldn't arm tunnel cq (%d)\n", ret);
2058                 goto err_wq;
2059         }
2060         ctx->state = DEMUX_PV_STATE_ACTIVE;
2061         return 0;
2062
2063 err_wq:
2064         ctx->wq = NULL;
2065         ib_destroy_qp(ctx->qp[1].qp);
2066         ctx->qp[1].qp = NULL;
2067
2068
2069 err_qp0:
2070         if (ctx->has_smi)
2071                 ib_destroy_qp(ctx->qp[0].qp);
2072         ctx->qp[0].qp = NULL;
2073
2074 err_pd:
2075         ib_dealloc_pd(ctx->pd);
2076         ctx->pd = NULL;
2077
2078 err_cq:
2079         ib_destroy_cq(ctx->cq);
2080         ctx->cq = NULL;
2081
2082 err_buf:
2083         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun);
2084
2085 err_out_qp0:
2086         if (ctx->has_smi)
2087                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun);
2088 err_out:
2089         ctx->state = DEMUX_PV_STATE_DOWN;
2090         return ret;
2091 }
2092
2093 static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port,
2094                                  struct mlx4_ib_demux_pv_ctx *ctx, int flush)
2095 {
2096         if (!ctx)
2097                 return;
2098         if (ctx->state > DEMUX_PV_STATE_DOWN) {
2099                 ctx->state = DEMUX_PV_STATE_DOWNING;
2100                 if (flush)
2101                         flush_workqueue(ctx->wq);
2102                 if (ctx->has_smi) {
2103                         ib_destroy_qp(ctx->qp[0].qp);
2104                         ctx->qp[0].qp = NULL;
2105                         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1);
2106                 }
2107                 ib_destroy_qp(ctx->qp[1].qp);
2108                 ctx->qp[1].qp = NULL;
2109                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1);
2110                 ib_dealloc_pd(ctx->pd);
2111                 ctx->pd = NULL;
2112                 ib_destroy_cq(ctx->cq);
2113                 ctx->cq = NULL;
2114                 ctx->state = DEMUX_PV_STATE_DOWN;
2115         }
2116 }
2117
2118 static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave,
2119                                   int port, int do_init)
2120 {
2121         int ret = 0;
2122
2123         if (!do_init) {
2124                 clean_vf_mcast(&dev->sriov.demux[port - 1], slave);
2125                 /* for master, destroy real sqp resources */
2126                 if (slave == mlx4_master_func_num(dev->dev))
2127                         destroy_pv_resources(dev, slave, port,
2128                                              dev->sriov.sqps[port - 1], 1);
2129                 /* destroy the tunnel qp resources */
2130                 destroy_pv_resources(dev, slave, port,
2131                                      dev->sriov.demux[port - 1].tun[slave], 1);
2132                 return 0;
2133         }
2134
2135         /* create the tunnel qp resources */
2136         ret = create_pv_resources(&dev->ib_dev, slave, port, 1,
2137                                   dev->sriov.demux[port - 1].tun[slave]);
2138
2139         /* for master, create the real sqp resources */
2140         if (!ret && slave == mlx4_master_func_num(dev->dev))
2141                 ret = create_pv_resources(&dev->ib_dev, slave, port, 0,
2142                                           dev->sriov.sqps[port - 1]);
2143         return ret;
2144 }
2145
2146 void mlx4_ib_tunnels_update_work(struct work_struct *work)
2147 {
2148         struct mlx4_ib_demux_work *dmxw;
2149
2150         dmxw = container_of(work, struct mlx4_ib_demux_work, work);
2151         mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port,
2152                                dmxw->do_init);
2153         kfree(dmxw);
2154         return;
2155 }
2156
2157 static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev,
2158                                        struct mlx4_ib_demux_ctx *ctx,
2159                                        int port)
2160 {
2161         char name[12];
2162         int ret = 0;
2163         int i;
2164
2165         ctx->tun = kcalloc(dev->dev->caps.sqp_demux,
2166                            sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL);
2167         if (!ctx->tun)
2168                 return -ENOMEM;
2169
2170         ctx->dev = dev;
2171         ctx->port = port;
2172         ctx->ib_dev = &dev->ib_dev;
2173
2174         for (i = 0;
2175              i < min(dev->dev->caps.sqp_demux,
2176              (u16)(dev->dev->persist->num_vfs + 1));
2177              i++) {
2178                 struct mlx4_active_ports actv_ports =
2179                         mlx4_get_active_ports(dev->dev, i);
2180
2181                 if (!test_bit(port - 1, actv_ports.ports))
2182                         continue;
2183
2184                 ret = alloc_pv_object(dev, i, port, &ctx->tun[i]);
2185                 if (ret) {
2186                         ret = -ENOMEM;
2187                         goto err_mcg;
2188                 }
2189         }
2190
2191         ret = mlx4_ib_mcg_port_init(ctx);
2192         if (ret) {
2193                 pr_err("Failed initializing mcg para-virt (%d)\n", ret);
2194                 goto err_mcg;
2195         }
2196
2197         snprintf(name, sizeof(name), "mlx4_ibt%d", port);
2198         ctx->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2199         if (!ctx->wq) {
2200                 pr_err("Failed to create tunnelling WQ for port %d\n", port);
2201                 ret = -ENOMEM;
2202                 goto err_wq;
2203         }
2204
2205         snprintf(name, sizeof(name), "mlx4_ibwi%d", port);
2206         ctx->wi_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2207         if (!ctx->wi_wq) {
2208                 pr_err("Failed to create wire WQ for port %d\n", port);
2209                 ret = -ENOMEM;
2210                 goto err_wiwq;
2211         }
2212
2213         snprintf(name, sizeof(name), "mlx4_ibud%d", port);
2214         ctx->ud_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2215         if (!ctx->ud_wq) {
2216                 pr_err("Failed to create up/down WQ for port %d\n", port);
2217                 ret = -ENOMEM;
2218                 goto err_udwq;
2219         }
2220
2221         return 0;
2222
2223 err_udwq:
2224         destroy_workqueue(ctx->wi_wq);
2225         ctx->wi_wq = NULL;
2226
2227 err_wiwq:
2228         destroy_workqueue(ctx->wq);
2229         ctx->wq = NULL;
2230
2231 err_wq:
2232         mlx4_ib_mcg_port_cleanup(ctx, 1);
2233 err_mcg:
2234         for (i = 0; i < dev->dev->caps.sqp_demux; i++)
2235                 free_pv_object(dev, i, port);
2236         kfree(ctx->tun);
2237         ctx->tun = NULL;
2238         return ret;
2239 }
2240
2241 static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx)
2242 {
2243         if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) {
2244                 sqp_ctx->state = DEMUX_PV_STATE_DOWNING;
2245                 flush_workqueue(sqp_ctx->wq);
2246                 if (sqp_ctx->has_smi) {
2247                         ib_destroy_qp(sqp_ctx->qp[0].qp);
2248                         sqp_ctx->qp[0].qp = NULL;
2249                         mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0);
2250                 }
2251                 ib_destroy_qp(sqp_ctx->qp[1].qp);
2252                 sqp_ctx->qp[1].qp = NULL;
2253                 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0);
2254                 ib_dealloc_pd(sqp_ctx->pd);
2255                 sqp_ctx->pd = NULL;
2256                 ib_destroy_cq(sqp_ctx->cq);
2257                 sqp_ctx->cq = NULL;
2258                 sqp_ctx->state = DEMUX_PV_STATE_DOWN;
2259         }
2260 }
2261
2262 static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx)
2263 {
2264         int i;
2265         if (ctx) {
2266                 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
2267                 mlx4_ib_mcg_port_cleanup(ctx, 1);
2268                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2269                         if (!ctx->tun[i])
2270                                 continue;
2271                         if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN)
2272                                 ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING;
2273                 }
2274                 flush_workqueue(ctx->wq);
2275                 flush_workqueue(ctx->wi_wq);
2276                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2277                         destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0);
2278                         free_pv_object(dev, i, ctx->port);
2279                 }
2280                 kfree(ctx->tun);
2281                 destroy_workqueue(ctx->ud_wq);
2282                 destroy_workqueue(ctx->wi_wq);
2283                 destroy_workqueue(ctx->wq);
2284         }
2285 }
2286
2287 static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init)
2288 {
2289         int i;
2290
2291         if (!mlx4_is_master(dev->dev))
2292                 return;
2293         /* initialize or tear down tunnel QPs for the master */
2294         for (i = 0; i < dev->dev->caps.num_ports; i++)
2295                 mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init);
2296         return;
2297 }
2298
2299 int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev)
2300 {
2301         int i = 0;
2302         int err;
2303
2304         if (!mlx4_is_mfunc(dev->dev))
2305                 return 0;
2306
2307         dev->sriov.is_going_down = 0;
2308         spin_lock_init(&dev->sriov.going_down_lock);
2309         mlx4_ib_cm_paravirt_init(dev);
2310
2311         mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n");
2312
2313         if (mlx4_is_slave(dev->dev)) {
2314                 mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n");
2315                 return 0;
2316         }
2317
2318         for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2319                 if (i == mlx4_master_func_num(dev->dev))
2320                         mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid);
2321                 else
2322                         mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid());
2323         }
2324
2325         err = mlx4_ib_init_alias_guid_service(dev);
2326         if (err) {
2327                 mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n");
2328                 goto paravirt_err;
2329         }
2330         err = mlx4_ib_device_register_sysfs(dev);
2331         if (err) {
2332                 mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n");
2333                 goto sysfs_err;
2334         }
2335
2336         mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n",
2337                      dev->dev->caps.sqp_demux);
2338         for (i = 0; i < dev->num_ports; i++) {
2339                 union ib_gid gid;
2340                 err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1);
2341                 if (err)
2342                         goto demux_err;
2343                 dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id;
2344                 atomic64_set(&dev->sriov.demux[i].subnet_prefix,
2345                              be64_to_cpu(gid.global.subnet_prefix));
2346                 err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1,
2347                                       &dev->sriov.sqps[i]);
2348                 if (err)
2349                         goto demux_err;
2350                 err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1);
2351                 if (err)
2352                         goto free_pv;
2353         }
2354         mlx4_ib_master_tunnels(dev, 1);
2355         return 0;
2356
2357 free_pv:
2358         free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2359 demux_err:
2360         while (--i >= 0) {
2361                 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2362                 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2363         }
2364         mlx4_ib_device_unregister_sysfs(dev);
2365
2366 sysfs_err:
2367         mlx4_ib_destroy_alias_guid_service(dev);
2368
2369 paravirt_err:
2370         mlx4_ib_cm_paravirt_clean(dev, -1);
2371
2372         return err;
2373 }
2374
2375 void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev)
2376 {
2377         int i;
2378         unsigned long flags;
2379
2380         if (!mlx4_is_mfunc(dev->dev))
2381                 return;
2382
2383         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
2384         dev->sriov.is_going_down = 1;
2385         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
2386         if (mlx4_is_master(dev->dev)) {
2387                 for (i = 0; i < dev->num_ports; i++) {
2388                         flush_workqueue(dev->sriov.demux[i].ud_wq);
2389                         mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]);
2390                         kfree(dev->sriov.sqps[i]);
2391                         dev->sriov.sqps[i] = NULL;
2392                         mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2393                 }
2394
2395                 mlx4_ib_cm_paravirt_clean(dev, -1);
2396                 mlx4_ib_destroy_alias_guid_service(dev);
2397                 mlx4_ib_device_unregister_sysfs(dev);
2398         }
2399 }