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, 0);
 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], 0);
 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 static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave)
 504 {
 505         int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave;
 506
 507         return (qpn >= proxy_start && qpn <= proxy_start + 1);
 508 }
 509
 510 int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
 511                           enum ib_qp_type dest_qpt, struct ib_wc *wc,
 512                           struct ib_grh *grh, struct ib_mad *mad)
 513 {
 514         struct ib_sge list;
 515         struct ib_ud_wr wr;
 516         const struct ib_send_wr *bad_wr;
 517         struct mlx4_ib_demux_pv_ctx *tun_ctx;
 518         struct mlx4_ib_demux_pv_qp *tun_qp;
 519         struct mlx4_rcv_tunnel_mad *tun_mad;
 520         struct rdma_ah_attr attr;
 521         struct ib_ah *ah;
 522         struct ib_qp *src_qp = NULL;
 523         unsigned tun_tx_ix = 0;
 524         int dqpn;
 525         int ret = 0;
 526         u16 tun_pkey_ix;
 527         u16 cached_pkey;
 528         u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
 529
 530         if (dest_qpt > IB_QPT_GSI) {
 531                 pr_debug("dest_qpt (%d) > IB_QPT_GSI\n", dest_qpt);
 532                 return -EINVAL;
 533         }
 534
 535         tun_ctx = dev->sriov.demux[port-1].tun[slave];
 536
 537         /* check if proxy qp created */
 538         if (!tun_ctx || tun_ctx->state != DEMUX_PV_STATE_ACTIVE)
 539                 return -EAGAIN;
 540
 541         if (!dest_qpt)
 542                 tun_qp = &tun_ctx->qp[0];
 543         else
 544                 tun_qp = &tun_ctx->qp[1];
 545
 546         /* compute P_Key index to put in tunnel header for slave */
 547         if (dest_qpt) {
 548                 u16 pkey_ix;
 549                 ret = ib_get_cached_pkey(&dev->ib_dev, port, wc->pkey_index, &cached_pkey);
 550                 if (ret) {
 551                         pr_debug("unable to get %s cached pkey for index %d, ret %d\n",
 552                                  is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI",
 553                                  wc->pkey_index, ret);
 554                         return -EINVAL;
 555                 }
 556
 557                 ret = find_slave_port_pkey_ix(dev, slave, port, cached_pkey, &pkey_ix);
 558                 if (ret) {
 559                         pr_debug("unable to get %s pkey ix for pkey 0x%x, ret %d\n",
 560                                  is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI",
 561                                  cached_pkey, ret);
 562                         return -EINVAL;
 563                 }
 564                 tun_pkey_ix = pkey_ix;
 565         } else
 566                 tun_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
 567
 568         dqpn = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave + port + (dest_qpt * 2) - 1;
 569
 570         /* get tunnel tx data buf for slave */
 571         src_qp = tun_qp->qp;
 572
 573         /* create ah. Just need an empty one with the port num for the post send.
 574          * The driver will set the force loopback bit in post_send */
 575         memset(&attr, 0, sizeof attr);
 576         attr.type = rdma_ah_find_type(&dev->ib_dev, port);
 577
 578         rdma_ah_set_port_num(&attr, port);
 579         if (is_eth) {
 580                 union ib_gid sgid;
 581                 union ib_gid dgid;
 582
 583                 if (get_gids_from_l3_hdr(grh, &sgid, &dgid))
 584                         return -EINVAL;
 585                 rdma_ah_set_grh(&attr, &dgid, 0, 0, 0, 0);
 586         }
 587         ah = rdma_create_ah(tun_ctx->pd, &attr, 0);
 588         if (IS_ERR(ah))
 589                 return -ENOMEM;
 590
 591         /* allocate tunnel tx buf after pass failure returns */
 592         spin_lock(&tun_qp->tx_lock);
 593         if (tun_qp->tx_ix_head - tun_qp->tx_ix_tail >=
 594             (MLX4_NUM_TUNNEL_BUFS - 1))
 595                 ret = -EAGAIN;
 596         else
 597                 tun_tx_ix = (++tun_qp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
 598         spin_unlock(&tun_qp->tx_lock);
 599         if (ret)
 600                 goto end;
 601
 602         tun_mad = (struct mlx4_rcv_tunnel_mad *) (tun_qp->tx_ring[tun_tx_ix].buf.addr);
 603         if (tun_qp->tx_ring[tun_tx_ix].ah)
 604                 rdma_destroy_ah(tun_qp->tx_ring[tun_tx_ix].ah, 0);
 605         tun_qp->tx_ring[tun_tx_ix].ah = ah;
 606         ib_dma_sync_single_for_cpu(&dev->ib_dev,
 607                                    tun_qp->tx_ring[tun_tx_ix].buf.map,
 608                                    sizeof (struct mlx4_rcv_tunnel_mad),
 609                                    DMA_TO_DEVICE);
 610
 611         /* copy over to tunnel buffer */
 612         if (grh)
 613                 memcpy(&tun_mad->grh, grh, sizeof *grh);
 614         memcpy(&tun_mad->mad, mad, sizeof *mad);
 615
 616         /* adjust tunnel data */
 617         tun_mad->hdr.pkey_index = cpu_to_be16(tun_pkey_ix);
 618         tun_mad->hdr.flags_src_qp = cpu_to_be32(wc->src_qp & 0xFFFFFF);
 619         tun_mad->hdr.g_ml_path = (grh && (wc->wc_flags & IB_WC_GRH)) ? 0x80 : 0;
 620
 621         if (is_eth) {
 622                 u16 vlan = 0;
 623                 if (mlx4_get_slave_default_vlan(dev->dev, port, slave, &vlan,
 624                                                 NULL)) {
 625                         /* VST mode */
 626                         if (vlan != wc->vlan_id)
 627                                 /* Packet vlan is not the VST-assigned vlan.
 628                                  * Drop the packet.
 629                                  */
 630                                 goto out;
 631                          else
 632                                 /* Remove the vlan tag before forwarding
 633                                  * the packet to the VF.
 634                                  */
 635                                 vlan = 0xffff;
 636                 } else {
 637                         vlan = wc->vlan_id;
 638                 }
 639
 640                 tun_mad->hdr.sl_vid = cpu_to_be16(vlan);
 641                 memcpy((char *)&tun_mad->hdr.mac_31_0, &(wc->smac[0]), 4);
 642                 memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2);
 643         } else {
 644                 tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12);
 645                 tun_mad->hdr.slid_mac_47_32 = ib_lid_be16(wc->slid);
 646         }
 647
 648         ib_dma_sync_single_for_device(&dev->ib_dev,
 649                                       tun_qp->tx_ring[tun_tx_ix].buf.map,
 650                                       sizeof (struct mlx4_rcv_tunnel_mad),
 651                                       DMA_TO_DEVICE);
 652
 653         list.addr = tun_qp->tx_ring[tun_tx_ix].buf.map;
 654         list.length = sizeof (struct mlx4_rcv_tunnel_mad);
 655         list.lkey = tun_ctx->pd->local_dma_lkey;
 656
 657         wr.ah = ah;
 658         wr.port_num = port;
 659         wr.remote_qkey = IB_QP_SET_QKEY;
 660         wr.remote_qpn = dqpn;
 661         wr.wr.next = NULL;
 662         wr.wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt);
 663         wr.wr.sg_list = &list;
 664         wr.wr.num_sge = 1;
 665         wr.wr.opcode = IB_WR_SEND;
 666         wr.wr.send_flags = IB_SEND_SIGNALED;
 667
 668         ret = ib_post_send(src_qp, &wr.wr, &bad_wr);
 669         if (!ret)
 670                 return 0;
 671  out:
 672         spin_lock(&tun_qp->tx_lock);
 673         tun_qp->tx_ix_tail++;
 674         spin_unlock(&tun_qp->tx_lock);
 675         tun_qp->tx_ring[tun_tx_ix].ah = NULL;
 676 end:
 677         rdma_destroy_ah(ah, 0);
 678         return ret;
 679 }
 680
 681 static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port,
 682                         struct ib_wc *wc, struct ib_grh *grh,
 683                         struct ib_mad *mad)
 684 {
 685         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 686         int err, other_port;
 687         int slave = -1;
 688         u8 *slave_id;
 689         int is_eth = 0;
 690
 691         if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
 692                 is_eth = 0;
 693         else
 694                 is_eth = 1;
 695
 696         if (is_eth) {
 697                 union ib_gid dgid;
 698                 union ib_gid sgid;
 699
 700                 if (get_gids_from_l3_hdr(grh, &sgid, &dgid))
 701                         return -EINVAL;
 702                 if (!(wc->wc_flags & IB_WC_GRH)) {
 703                         mlx4_ib_warn(ibdev, "RoCE grh not present.\n");
 704                         return -EINVAL;
 705                 }
 706                 if (mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_CM) {
 707                         mlx4_ib_warn(ibdev, "RoCE mgmt class is not CM\n");
 708                         return -EINVAL;
 709                 }
 710                 err = mlx4_get_slave_from_roce_gid(dev->dev, port, dgid.raw, &slave);
 711                 if (err && mlx4_is_mf_bonded(dev->dev)) {
 712                         other_port = (port == 1) ? 2 : 1;
 713                         err = mlx4_get_slave_from_roce_gid(dev->dev, other_port, dgid.raw, &slave);
 714                         if (!err) {
 715                                 port = other_port;
 716                                 pr_debug("resolved slave %d from gid %pI6 wire port %d other %d\n",
 717                                          slave, grh->dgid.raw, port, other_port);
 718                         }
 719                 }
 720                 if (err) {
 721                         mlx4_ib_warn(ibdev, "failed matching grh\n");
 722                         return -ENOENT;
 723                 }
 724                 if (slave >= dev->dev->caps.sqp_demux) {
 725                         mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 726                                      slave, dev->dev->caps.sqp_demux);
 727                         return -ENOENT;
 728                 }
 729
 730                 if (mlx4_ib_demux_cm_handler(ibdev, port, NULL, mad))
 731                         return 0;
 732
 733                 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 734                 if (err)
 735                         pr_debug("failed sending %s to slave %d via tunnel qp (%d)\n",
 736                                  is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI",
 737                                  slave, err);
 738                 return 0;
 739         }
 740
 741         /* Initially assume that this mad is for us */
 742         slave = mlx4_master_func_num(dev->dev);
 743
 744         /* See if the slave id is encoded in a response mad */
 745         if (mad->mad_hdr.method & 0x80) {
 746                 slave_id = (u8 *) &mad->mad_hdr.tid;
 747                 slave = *slave_id;
 748                 if (slave != 255) /*255 indicates the dom0*/
 749                         *slave_id = 0; /* remap tid */
 750         }
 751
 752         /* If a grh is present, we demux according to it */
 753         if (wc->wc_flags & IB_WC_GRH) {
 754                 if (grh->dgid.global.interface_id ==
 755                         cpu_to_be64(IB_SA_WELL_KNOWN_GUID) &&
 756                     grh->dgid.global.subnet_prefix == cpu_to_be64(
 757                         atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix))) {
 758                         slave = 0;
 759                 } else {
 760                         slave = mlx4_ib_find_real_gid(ibdev, port,
 761                                                       grh->dgid.global.interface_id);
 762                         if (slave < 0) {
 763                                 mlx4_ib_warn(ibdev, "failed matching grh\n");
 764                                 return -ENOENT;
 765                         }
 766                 }
 767         }
 768         /* Class-specific handling */
 769         switch (mad->mad_hdr.mgmt_class) {
 770         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
 771         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
 772                 /* 255 indicates the dom0 */
 773                 if (slave != 255 && slave != mlx4_master_func_num(dev->dev)) {
 774                         if (!mlx4_vf_smi_enabled(dev->dev, slave, port))
 775                                 return -EPERM;
 776                         /* for a VF. drop unsolicited MADs */
 777                         if (!(mad->mad_hdr.method & IB_MGMT_METHOD_RESP)) {
 778                                 mlx4_ib_warn(ibdev, "demux QP0. rejecting unsolicited mad for slave %d class 0x%x, method 0x%x\n",
 779                                              slave, mad->mad_hdr.mgmt_class,
 780                                              mad->mad_hdr.method);
 781                                 return -EINVAL;
 782                         }
 783                 }
 784                 break;
 785         case IB_MGMT_CLASS_SUBN_ADM:
 786                 if (mlx4_ib_demux_sa_handler(ibdev, port, slave,
 787                                              (struct ib_sa_mad *) mad))
 788                         return 0;
 789                 break;
 790         case IB_MGMT_CLASS_CM:
 791                 if (mlx4_ib_demux_cm_handler(ibdev, port, &slave, mad))
 792                         return 0;
 793                 break;
 794         case IB_MGMT_CLASS_DEVICE_MGMT:
 795                 if (mad->mad_hdr.method != IB_MGMT_METHOD_GET_RESP)
 796                         return 0;
 797                 break;
 798         default:
 799                 /* Drop unsupported classes for slaves in tunnel mode */
 800                 if (slave != mlx4_master_func_num(dev->dev)) {
 801                         pr_debug("dropping unsupported ingress mad from class:%d "
 802                                  "for slave:%d\n", mad->mad_hdr.mgmt_class, slave);
 803                         return 0;
 804                 }
 805         }
 806         /*make sure that no slave==255 was not handled yet.*/
 807         if (slave >= dev->dev->caps.sqp_demux) {
 808                 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 809                              slave, dev->dev->caps.sqp_demux);
 810                 return -ENOENT;
 811         }
 812
 813         err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 814         if (err)
 815                 pr_debug("failed sending %s to slave %d via tunnel qp (%d)\n",
 816                          is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI",
 817                          slave, err);
 818         return 0;
 819 }
 820
 821 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 822                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 823                         const struct ib_mad *in_mad, struct ib_mad *out_mad)
 824 {
 825         u16 slid, prev_lid = 0;
 826         int err;
 827         struct ib_port_attr pattr;
 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                 switch (counter_stats.counter_mode & 0xf) {
 968                 case 0:
 969                         edit_counter(&counter_stats,
 970                                      (void *)(out_mad->data + 40),
 971                                      in_mad->mad_hdr.attr_id);
 972                         err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 973                         break;
 974                 default:
 975                         err = IB_MAD_RESULT_FAILURE;
 976                 }
 977         }
 978
 979         return err;
 980 }
 981
 982 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 983                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 984                         const struct ib_mad *in, struct ib_mad *out,
 985                         size_t *out_mad_size, u16 *out_mad_pkey_index)
 986 {
 987         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 988         enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num);
 989
 990         /* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA
 991          * queries, should be called only by VFs and for that specific purpose
 992          */
 993         if (link == IB_LINK_LAYER_INFINIBAND) {
 994                 if (mlx4_is_slave(dev->dev) &&
 995                     (in->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT &&
 996                      (in->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS ||
 997                       in->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT ||
 998                       in->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO)))
 999                         return iboe_process_mad(ibdev, mad_flags, port_num,
1000                                                 in_wc, in_grh, in, out);
1001
1002                 return ib_process_mad(ibdev, mad_flags, port_num, in_wc, in_grh,
1003                                       in, out);
1004         }
1005
1006         if (link == IB_LINK_LAYER_ETHERNET)
1007                 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
1008                                         in_grh, in, out);
1009
1010         return -EINVAL;
1011 }
1012
1013 static void send_handler(struct ib_mad_agent *agent,
1014                          struct ib_mad_send_wc *mad_send_wc)
1015 {
1016         if (mad_send_wc->send_buf->context[0])
1017                 rdma_destroy_ah(mad_send_wc->send_buf->context[0], 0);
1018         ib_free_send_mad(mad_send_wc->send_buf);
1019 }
1020
1021 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
1022 {
1023         struct ib_mad_agent *agent;
1024         int p, q;
1025         int ret;
1026         enum rdma_link_layer ll;
1027
1028         for (p = 0; p < dev->num_ports; ++p) {
1029                 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1);
1030                 for (q = 0; q <= 1; ++q) {
1031                         if (ll == IB_LINK_LAYER_INFINIBAND) {
1032                                 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
1033                                                               q ? IB_QPT_GSI : IB_QPT_SMI,
1034                                                               NULL, 0, send_handler,
1035                                                               NULL, NULL, 0);
1036                                 if (IS_ERR(agent)) {
1037                                         ret = PTR_ERR(agent);
1038                                         goto err;
1039                                 }
1040                                 dev->send_agent[p][q] = agent;
1041                         } else
1042                                 dev->send_agent[p][q] = NULL;
1043                 }
1044         }
1045
1046         return 0;
1047
1048 err:
1049         for (p = 0; p < dev->num_ports; ++p)
1050                 for (q = 0; q <= 1; ++q)
1051                         if (dev->send_agent[p][q])
1052                                 ib_unregister_mad_agent(dev->send_agent[p][q]);
1053
1054         return ret;
1055 }
1056
1057 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
1058 {
1059         struct ib_mad_agent *agent;
1060         int p, q;
1061
1062         for (p = 0; p < dev->num_ports; ++p) {
1063                 for (q = 0; q <= 1; ++q) {
1064                         agent = dev->send_agent[p][q];
1065                         if (agent) {
1066                                 dev->send_agent[p][q] = NULL;
1067                                 ib_unregister_mad_agent(agent);
1068                         }
1069                 }
1070
1071                 if (dev->sm_ah[p])
1072                         rdma_destroy_ah(dev->sm_ah[p], 0);
1073         }
1074 }
1075
1076 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num)
1077 {
1078         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_LID_CHANGE);
1079
1080         if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
1081                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
1082                                             MLX4_EQ_PORT_INFO_LID_CHANGE_MASK);
1083 }
1084
1085 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num)
1086 {
1087         /* re-configure the alias-guid and mcg's */
1088         if (mlx4_is_master(dev->dev)) {
1089                 mlx4_ib_invalidate_all_guid_record(dev, port_num);
1090
1091                 if (!dev->sriov.is_going_down) {
1092                         mlx4_ib_mcg_port_cleanup(&dev->sriov.demux[port_num - 1], 0);
1093                         mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
1094                                                     MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK);
1095                 }
1096         }
1097
1098         /* Update the sl to vl table from inside client rereg
1099          * only if in secure-host mode (snooping is not possible)
1100          * and the sl-to-vl change event is not generated by FW.
1101          */
1102         if (!mlx4_is_slave(dev->dev) &&
1103             dev->dev->flags & MLX4_FLAG_SECURE_HOST &&
1104             !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)) {
1105                 if (mlx4_is_master(dev->dev))
1106                         /* already in work queue from mlx4_ib_event queueing
1107                          * mlx4_handle_port_mgmt_change_event, which calls
1108                          * this procedure. Therefore, call sl2vl_update directly.
1109                          */
1110                         mlx4_ib_sl2vl_update(dev, port_num);
1111                 else
1112                         mlx4_sched_ib_sl2vl_update_work(dev, port_num);
1113         }
1114         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_CLIENT_REREGISTER);
1115 }
1116
1117 static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
1118                               struct mlx4_eqe *eqe)
1119 {
1120         __propagate_pkey_ev(dev, port_num, GET_BLK_PTR_FROM_EQE(eqe),
1121                             GET_MASK_FROM_EQE(eqe));
1122 }
1123
1124 static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num,
1125                                       u32 guid_tbl_blk_num, u32 change_bitmap)
1126 {
1127         struct ib_smp *in_mad  = NULL;
1128         struct ib_smp *out_mad  = NULL;
1129         u16 i;
1130
1131         if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev))
1132                 return;
1133
1134         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
1135         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1136         if (!in_mad || !out_mad)
1137                 goto out;
1138
1139         guid_tbl_blk_num  *= 4;
1140
1141         for (i = 0; i < 4; i++) {
1142                 if (change_bitmap && (!((change_bitmap >> (8 * i)) & 0xff)))
1143                         continue;
1144                 memset(in_mad, 0, sizeof *in_mad);
1145                 memset(out_mad, 0, sizeof *out_mad);
1146
1147                 in_mad->base_version  = 1;
1148                 in_mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
1149                 in_mad->class_version = 1;
1150                 in_mad->method        = IB_MGMT_METHOD_GET;
1151                 in_mad->attr_id       = IB_SMP_ATTR_GUID_INFO;
1152                 in_mad->attr_mod      = cpu_to_be32(guid_tbl_blk_num + i);
1153
1154                 if (mlx4_MAD_IFC(dev,
1155                                  MLX4_MAD_IFC_IGNORE_KEYS | MLX4_MAD_IFC_NET_VIEW,
1156                                  port_num, NULL, NULL, in_mad, out_mad)) {
1157                         mlx4_ib_warn(&dev->ib_dev, "Failed in get GUID INFO MAD_IFC\n");
1158                         goto out;
1159                 }
1160
1161                 mlx4_ib_update_cache_on_guid_change(dev, guid_tbl_blk_num + i,
1162                                                     port_num,
1163                                                     (u8 *)(&((struct ib_smp *)out_mad)->data));
1164                 mlx4_ib_notify_slaves_on_guid_change(dev, guid_tbl_blk_num + i,
1165                                                      port_num,
1166                                                      (u8 *)(&((struct ib_smp *)out_mad)->data));
1167         }
1168
1169 out:
1170         kfree(in_mad);
1171         kfree(out_mad);
1172         return;
1173 }
1174
1175 void handle_port_mgmt_change_event(struct work_struct *work)
1176 {
1177         struct ib_event_work *ew = container_of(work, struct ib_event_work, work);
1178         struct mlx4_ib_dev *dev = ew->ib_dev;
1179         struct mlx4_eqe *eqe = &(ew->ib_eqe);
1180         u8 port = eqe->event.port_mgmt_change.port;
1181         u32 changed_attr;
1182         u32 tbl_block;
1183         u32 change_bitmap;
1184
1185         switch (eqe->subtype) {
1186         case MLX4_DEV_PMC_SUBTYPE_PORT_INFO:
1187                 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr);
1188
1189                 /* Update the SM ah - This should be done before handling
1190                    the other changed attributes so that MADs can be sent to the SM */
1191                 if (changed_attr & MSTR_SM_CHANGE_MASK) {
1192                         u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid);
1193                         u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf;
1194                         update_sm_ah(dev, port, lid, sl);
1195                 }
1196
1197                 /* Check if it is a lid change event */
1198                 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK)
1199                         handle_lid_change_event(dev, port);
1200
1201                 /* Generate GUID changed event */
1202                 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) {
1203                         if (mlx4_is_master(dev->dev)) {
1204                                 union ib_gid gid;
1205                                 int err = 0;
1206
1207                                 if (!eqe->event.port_mgmt_change.params.port_info.gid_prefix)
1208                                         err = __mlx4_ib_query_gid(&dev->ib_dev, port, 0, &gid, 1);
1209                                 else
1210                                         gid.global.subnet_prefix =
1211                                                 eqe->event.port_mgmt_change.params.port_info.gid_prefix;
1212                                 if (err) {
1213                                         pr_warn("Could not change QP1 subnet prefix for port %d: query_gid error (%d)\n",
1214                                                 port, err);
1215                                 } else {
1216                                         pr_debug("Changing QP1 subnet prefix for port %d. old=0x%llx. new=0x%llx\n",
1217                                                  port,
1218                                                  (u64)atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix),
1219                                                  be64_to_cpu(gid.global.subnet_prefix));
1220                                         atomic64_set(&dev->sriov.demux[port - 1].subnet_prefix,
1221                                                      be64_to_cpu(gid.global.subnet_prefix));
1222                                 }
1223                         }
1224                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1225                         /*if master, notify all slaves*/
1226                         if (mlx4_is_master(dev->dev))
1227                                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port,
1228                                                             MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK);
1229                 }
1230
1231                 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK)
1232                         handle_client_rereg_event(dev, port);
1233                 break;
1234
1235         case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE:
1236                 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE);
1237                 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
1238                         propagate_pkey_ev(dev, port, eqe);
1239                 break;
1240         case MLX4_DEV_PMC_SUBTYPE_GUID_INFO:
1241                 /* paravirtualized master's guid is guid 0 -- does not change */
1242                 if (!mlx4_is_master(dev->dev))
1243                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1244                 /*if master, notify relevant slaves*/
1245                 else if (!dev->sriov.is_going_down) {
1246                         tbl_block = GET_BLK_PTR_FROM_EQE(eqe);
1247                         change_bitmap = GET_MASK_FROM_EQE(eqe);
1248                         handle_slaves_guid_change(dev, port, tbl_block, change_bitmap);
1249                 }
1250                 break;
1251
1252         case MLX4_DEV_PMC_SUBTYPE_SL_TO_VL_MAP:
1253                 /* cache sl to vl mapping changes for use in
1254                  * filling QP1 LRH VL field when sending packets
1255                  */
1256                 if (!mlx4_is_slave(dev->dev)) {
1257                         union sl2vl_tbl_to_u64 sl2vl64;
1258                         int jj;
1259
1260                         for (jj = 0; jj < 8; jj++) {
1261                                 sl2vl64.sl8[jj] =
1262                                         eqe->event.port_mgmt_change.params.sl2vl_tbl_change_info.sl2vl_table[jj];
1263                                 pr_debug("port %u, sl2vl[%d] = %02x\n",
1264                                          port, jj, sl2vl64.sl8[jj]);
1265                         }
1266                         atomic64_set(&dev->sl2vl[port - 1], sl2vl64.sl64);
1267                 }
1268                 break;
1269         default:
1270                 pr_warn("Unsupported subtype 0x%x for "
1271                         "Port Management Change event\n", eqe->subtype);
1272         }
1273
1274         kfree(ew);
1275 }
1276
1277 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num,
1278                             enum ib_event_type type)
1279 {
1280         struct ib_event event;
1281
1282         event.device            = &dev->ib_dev;
1283         event.element.port_num  = port_num;
1284         event.event             = type;
1285
1286         ib_dispatch_event(&event);
1287 }
1288
1289 static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg)
1290 {
1291         unsigned long flags;
1292         struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context;
1293         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1294         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
1295         if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE)
1296                 queue_work(ctx->wq, &ctx->work);
1297         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
1298 }
1299
1300 static void mlx4_ib_wire_comp_handler(struct ib_cq *cq, void *arg)
1301 {
1302         unsigned long flags;
1303         struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context;
1304         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1305
1306         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
1307         if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE)
1308                 queue_work(ctx->wi_wq, &ctx->work);
1309         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
1310 }
1311
1312 static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx,
1313                                   struct mlx4_ib_demux_pv_qp *tun_qp,
1314                                   int index)
1315 {
1316         struct ib_sge sg_list;
1317         struct ib_recv_wr recv_wr;
1318         const struct ib_recv_wr *bad_recv_wr;
1319         int size;
1320
1321         size = (tun_qp->qp->qp_type == IB_QPT_UD) ?
1322                 sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf);
1323
1324         sg_list.addr = tun_qp->ring[index].map;
1325         sg_list.length = size;
1326         sg_list.lkey = ctx->pd->local_dma_lkey;
1327
1328         recv_wr.next = NULL;
1329         recv_wr.sg_list = &sg_list;
1330         recv_wr.num_sge = 1;
1331         recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV |
1332                 MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt);
1333         ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map,
1334                                       size, DMA_FROM_DEVICE);
1335         return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr);
1336 }
1337
1338 static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port,
1339                 int slave, struct ib_sa_mad *sa_mad)
1340 {
1341         int ret = 0;
1342
1343         /* dispatch to different sa handlers */
1344         switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
1345         case IB_SA_ATTR_MC_MEMBER_REC:
1346                 ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad);
1347                 break;
1348         default:
1349                 break;
1350         }
1351         return ret;
1352 }
1353
1354 int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u8 port,
1355                          enum ib_qp_type dest_qpt, u16 pkey_index,
1356                          u32 remote_qpn, u32 qkey, struct rdma_ah_attr *attr,
1357                          u8 *s_mac, u16 vlan_id, struct ib_mad *mad)
1358 {
1359         struct ib_sge list;
1360         struct ib_ud_wr wr;
1361         const struct ib_send_wr *bad_wr;
1362         struct mlx4_ib_demux_pv_ctx *sqp_ctx;
1363         struct mlx4_ib_demux_pv_qp *sqp;
1364         struct mlx4_mad_snd_buf *sqp_mad;
1365         struct ib_ah *ah;
1366         struct ib_qp *send_qp = NULL;
1367         unsigned wire_tx_ix = 0;
1368         u16 wire_pkey_ix;
1369         int src_qpnum;
1370         int ret;
1371
1372         sqp_ctx = dev->sriov.sqps[port-1];
1373
1374         /* check if proxy qp created */
1375         if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE)
1376                 return -EAGAIN;
1377
1378         if (dest_qpt == IB_QPT_SMI) {
1379                 src_qpnum = 0;
1380                 sqp = &sqp_ctx->qp[0];
1381                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
1382         } else {
1383                 src_qpnum = 1;
1384                 sqp = &sqp_ctx->qp[1];
1385                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index];
1386         }
1387
1388         send_qp = sqp->qp;
1389
1390         ah = rdma_zalloc_drv_obj(sqp_ctx->pd->device, ib_ah);
1391         if (!ah)
1392                 return -ENOMEM;
1393
1394         ah->device = sqp_ctx->pd->device;
1395         ah->pd = sqp_ctx->pd;
1396
1397         /* create ah */
1398         ret = mlx4_ib_create_ah_slave(ah, attr,
1399                                       rdma_ah_retrieve_grh(attr)->sgid_index,
1400                                       s_mac, vlan_id);
1401         if (ret)
1402                 goto out;
1403
1404         spin_lock(&sqp->tx_lock);
1405         if (sqp->tx_ix_head - sqp->tx_ix_tail >=
1406             (MLX4_NUM_WIRE_BUFS - 1))
1407                 ret = -EAGAIN;
1408         else
1409                 wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_WIRE_BUFS - 1);
1410         spin_unlock(&sqp->tx_lock);
1411         if (ret)
1412                 goto out;
1413
1414         sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr);
1415         kfree(sqp->tx_ring[wire_tx_ix].ah);
1416         sqp->tx_ring[wire_tx_ix].ah = ah;
1417         ib_dma_sync_single_for_cpu(&dev->ib_dev,
1418                                    sqp->tx_ring[wire_tx_ix].buf.map,
1419                                    sizeof (struct mlx4_mad_snd_buf),
1420                                    DMA_TO_DEVICE);
1421
1422         memcpy(&sqp_mad->payload, mad, sizeof *mad);
1423
1424         ib_dma_sync_single_for_device(&dev->ib_dev,
1425                                       sqp->tx_ring[wire_tx_ix].buf.map,
1426                                       sizeof (struct mlx4_mad_snd_buf),
1427                                       DMA_TO_DEVICE);
1428
1429         list.addr = sqp->tx_ring[wire_tx_ix].buf.map;
1430         list.length = sizeof (struct mlx4_mad_snd_buf);
1431         list.lkey = sqp_ctx->pd->local_dma_lkey;
1432
1433         wr.ah = ah;
1434         wr.port_num = port;
1435         wr.pkey_index = wire_pkey_ix;
1436         wr.remote_qkey = qkey;
1437         wr.remote_qpn = remote_qpn;
1438         wr.wr.next = NULL;
1439         wr.wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum);
1440         wr.wr.sg_list = &list;
1441         wr.wr.num_sge = 1;
1442         wr.wr.opcode = IB_WR_SEND;
1443         wr.wr.send_flags = IB_SEND_SIGNALED;
1444
1445         ret = ib_post_send(send_qp, &wr.wr, &bad_wr);
1446         if (!ret)
1447                 return 0;
1448
1449         spin_lock(&sqp->tx_lock);
1450         sqp->tx_ix_tail++;
1451         spin_unlock(&sqp->tx_lock);
1452         sqp->tx_ring[wire_tx_ix].ah = NULL;
1453 out:
1454         kfree(ah);
1455         return ret;
1456 }
1457
1458 static int get_slave_base_gid_ix(struct mlx4_ib_dev *dev, int slave, int port)
1459 {
1460         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1461                 return slave;
1462         return mlx4_get_base_gid_ix(dev->dev, slave, port);
1463 }
1464
1465 static void fill_in_real_sgid_index(struct mlx4_ib_dev *dev, int slave, int port,
1466                                     struct rdma_ah_attr *ah_attr)
1467 {
1468         struct ib_global_route *grh = rdma_ah_retrieve_grh(ah_attr);
1469         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1470                 grh->sgid_index = slave;
1471         else
1472                 grh->sgid_index += get_slave_base_gid_ix(dev, slave, port);
1473 }
1474
1475 static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc)
1476 {
1477         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1478         struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)];
1479         int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1);
1480         struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr;
1481         struct mlx4_ib_ah ah;
1482         struct rdma_ah_attr ah_attr;
1483         u8 *slave_id;
1484         int slave;
1485         int port;
1486         u16 vlan_id;
1487         u8 qos;
1488         u8 *dmac;
1489         int sts;
1490
1491         /* Get slave that sent this packet */
1492         if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn ||
1493             wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX ||
1494             (wc->src_qp & 0x1) != ctx->port - 1 ||
1495             wc->src_qp & 0x4) {
1496                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp);
1497                 return;
1498         }
1499         slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8;
1500         if (slave != ctx->slave) {
1501                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: "
1502                              "belongs to another slave\n", wc->src_qp);
1503                 return;
1504         }
1505
1506         /* Map transaction ID */
1507         ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map,
1508                                    sizeof (struct mlx4_tunnel_mad),
1509                                    DMA_FROM_DEVICE);
1510         switch (tunnel->mad.mad_hdr.method) {
1511         case IB_MGMT_METHOD_SET:
1512         case IB_MGMT_METHOD_GET:
1513         case IB_MGMT_METHOD_REPORT:
1514         case IB_SA_METHOD_GET_TABLE:
1515         case IB_SA_METHOD_DELETE:
1516         case IB_SA_METHOD_GET_MULTI:
1517         case IB_SA_METHOD_GET_TRACE_TBL:
1518                 slave_id = (u8 *) &tunnel->mad.mad_hdr.tid;
1519                 if (*slave_id) {
1520                         mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d "
1521                                      "class:%d slave:%d\n", *slave_id,
1522                                      tunnel->mad.mad_hdr.mgmt_class, slave);
1523                         return;
1524                 } else
1525                         *slave_id = slave;
1526                 break;
1527         default:
1528                 /* nothing */;
1529         }
1530
1531         /* Class-specific handling */
1532         switch (tunnel->mad.mad_hdr.mgmt_class) {
1533         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1534         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1535                 if (slave != mlx4_master_func_num(dev->dev) &&
1536                     !mlx4_vf_smi_enabled(dev->dev, slave, ctx->port))
1537                         return;
1538                 break;
1539         case IB_MGMT_CLASS_SUBN_ADM:
1540                 if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave,
1541                               (struct ib_sa_mad *) &tunnel->mad))
1542                         return;
1543                 break;
1544         case IB_MGMT_CLASS_CM:
1545                 if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave,
1546                               (struct ib_mad *) &tunnel->mad))
1547                         return;
1548                 break;
1549         case IB_MGMT_CLASS_DEVICE_MGMT:
1550                 if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET &&
1551                     tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET)
1552                         return;
1553                 break;
1554         default:
1555                 /* Drop unsupported classes for slaves in tunnel mode */
1556                 if (slave != mlx4_master_func_num(dev->dev)) {
1557                         mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d "
1558                                      "for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave);
1559                         return;
1560                 }
1561         }
1562
1563         /* We are using standard ib_core services to send the mad, so generate a
1564          * stadard address handle by decoding the tunnelled mlx4_ah fields */
1565         memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av));
1566         ah.ibah.device = ctx->ib_dev;
1567
1568         port = be32_to_cpu(ah.av.ib.port_pd) >> 24;
1569         port = mlx4_slave_convert_port(dev->dev, slave, port);
1570         if (port < 0)
1571                 return;
1572         ah.av.ib.port_pd = cpu_to_be32(port << 24 | (be32_to_cpu(ah.av.ib.port_pd) & 0xffffff));
1573         ah.ibah.type = rdma_ah_find_type(&dev->ib_dev, port);
1574
1575         mlx4_ib_query_ah(&ah.ibah, &ah_attr);
1576         if (rdma_ah_get_ah_flags(&ah_attr) & IB_AH_GRH)
1577                 fill_in_real_sgid_index(dev, slave, ctx->port, &ah_attr);
1578         dmac = rdma_ah_retrieve_dmac(&ah_attr);
1579         if (dmac)
1580                 memcpy(dmac, tunnel->hdr.mac, ETH_ALEN);
1581         vlan_id = be16_to_cpu(tunnel->hdr.vlan);
1582         /* if slave have default vlan use it */
1583         if (mlx4_get_slave_default_vlan(dev->dev, ctx->port, slave,
1584                                         &vlan_id, &qos))
1585                 rdma_ah_set_sl(&ah_attr, qos);
1586
1587         sts = mlx4_ib_send_to_wire(dev, slave, ctx->port,
1588                                    is_proxy_qp0(dev, wc->src_qp, slave) ?
1589                                    IB_QPT_SMI : IB_QPT_GSI,
1590                                    be16_to_cpu(tunnel->hdr.pkey_index),
1591                                    be32_to_cpu(tunnel->hdr.remote_qpn),
1592                                    be32_to_cpu(tunnel->hdr.qkey),
1593                                    &ah_attr, wc->smac, vlan_id, &tunnel->mad);
1594         if (sts)
1595                 pr_debug("failed sending %s to wire on behalf of slave %d (%d)\n",
1596                          is_proxy_qp0(dev, wc->src_qp, slave) ? "SMI" : "GSI",
1597                          slave, sts);
1598 }
1599
1600 static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1601                                  enum ib_qp_type qp_type, int is_tun)
1602 {
1603         int i;
1604         struct mlx4_ib_demux_pv_qp *tun_qp;
1605         int rx_buf_size, tx_buf_size;
1606         const int nmbr_bufs = is_tun ? MLX4_NUM_TUNNEL_BUFS : MLX4_NUM_WIRE_BUFS;
1607
1608         if (qp_type > IB_QPT_GSI)
1609                 return -EINVAL;
1610
1611         tun_qp = &ctx->qp[qp_type];
1612
1613         tun_qp->ring = kcalloc(nmbr_bufs,
1614                                sizeof(struct mlx4_ib_buf),
1615                                GFP_KERNEL);
1616         if (!tun_qp->ring)
1617                 return -ENOMEM;
1618
1619         tun_qp->tx_ring = kcalloc(nmbr_bufs,
1620                                   sizeof (struct mlx4_ib_tun_tx_buf),
1621                                   GFP_KERNEL);
1622         if (!tun_qp->tx_ring) {
1623                 kfree(tun_qp->ring);
1624                 tun_qp->ring = NULL;
1625                 return -ENOMEM;
1626         }
1627
1628         if (is_tun) {
1629                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1630                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1631         } else {
1632                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1633                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1634         }
1635
1636         for (i = 0; i < nmbr_bufs; i++) {
1637                 tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL);
1638                 if (!tun_qp->ring[i].addr)
1639                         goto err;
1640                 tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev,
1641                                                         tun_qp->ring[i].addr,
1642                                                         rx_buf_size,
1643                                                         DMA_FROM_DEVICE);
1644                 if (ib_dma_mapping_error(ctx->ib_dev, tun_qp->ring[i].map)) {
1645                         kfree(tun_qp->ring[i].addr);
1646                         goto err;
1647                 }
1648         }
1649
1650         for (i = 0; i < nmbr_bufs; i++) {
1651                 tun_qp->tx_ring[i].buf.addr =
1652                         kmalloc(tx_buf_size, GFP_KERNEL);
1653                 if (!tun_qp->tx_ring[i].buf.addr)
1654                         goto tx_err;
1655                 tun_qp->tx_ring[i].buf.map =
1656                         ib_dma_map_single(ctx->ib_dev,
1657                                           tun_qp->tx_ring[i].buf.addr,
1658                                           tx_buf_size,
1659                                           DMA_TO_DEVICE);
1660                 if (ib_dma_mapping_error(ctx->ib_dev,
1661                                          tun_qp->tx_ring[i].buf.map)) {
1662                         kfree(tun_qp->tx_ring[i].buf.addr);
1663                         goto tx_err;
1664                 }
1665                 tun_qp->tx_ring[i].ah = NULL;
1666         }
1667         spin_lock_init(&tun_qp->tx_lock);
1668         tun_qp->tx_ix_head = 0;
1669         tun_qp->tx_ix_tail = 0;
1670         tun_qp->proxy_qpt = qp_type;
1671
1672         return 0;
1673
1674 tx_err:
1675         while (i > 0) {
1676                 --i;
1677                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1678                                     tx_buf_size, DMA_TO_DEVICE);
1679                 kfree(tun_qp->tx_ring[i].buf.addr);
1680         }
1681         i = nmbr_bufs;
1682 err:
1683         while (i > 0) {
1684                 --i;
1685                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1686                                     rx_buf_size, DMA_FROM_DEVICE);
1687                 kfree(tun_qp->ring[i].addr);
1688         }
1689         kfree(tun_qp->tx_ring);
1690         tun_qp->tx_ring = NULL;
1691         kfree(tun_qp->ring);
1692         tun_qp->ring = NULL;
1693         return -ENOMEM;
1694 }
1695
1696 static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1697                                      enum ib_qp_type qp_type, int is_tun)
1698 {
1699         int i;
1700         struct mlx4_ib_demux_pv_qp *tun_qp;
1701         int rx_buf_size, tx_buf_size;
1702         const int nmbr_bufs = is_tun ? MLX4_NUM_TUNNEL_BUFS : MLX4_NUM_WIRE_BUFS;
1703
1704         if (qp_type > IB_QPT_GSI)
1705                 return;
1706
1707         tun_qp = &ctx->qp[qp_type];
1708         if (is_tun) {
1709                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1710                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1711         } else {
1712                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1713                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1714         }
1715
1716
1717         for (i = 0; i < nmbr_bufs; i++) {
1718                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1719                                     rx_buf_size, DMA_FROM_DEVICE);
1720                 kfree(tun_qp->ring[i].addr);
1721         }
1722
1723         for (i = 0; i < nmbr_bufs; i++) {
1724                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1725                                     tx_buf_size, DMA_TO_DEVICE);
1726                 kfree(tun_qp->tx_ring[i].buf.addr);
1727                 if (tun_qp->tx_ring[i].ah)
1728                         rdma_destroy_ah(tun_qp->tx_ring[i].ah, 0);
1729         }
1730         kfree(tun_qp->tx_ring);
1731         kfree(tun_qp->ring);
1732 }
1733
1734 static void mlx4_ib_tunnel_comp_worker(struct work_struct *work)
1735 {
1736         struct mlx4_ib_demux_pv_ctx *ctx;
1737         struct mlx4_ib_demux_pv_qp *tun_qp;
1738         struct ib_wc wc;
1739         int ret;
1740         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1741         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1742
1743         while (ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1744                 tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1745                 if (wc.status == IB_WC_SUCCESS) {
1746                         switch (wc.opcode) {
1747                         case IB_WC_RECV:
1748                                 mlx4_ib_multiplex_mad(ctx, &wc);
1749                                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp,
1750                                                              wc.wr_id &
1751                                                              (MLX4_NUM_TUNNEL_BUFS - 1));
1752                                 if (ret)
1753                                         pr_err("Failed reposting tunnel "
1754                                                "buf:%lld\n", wc.wr_id);
1755                                 break;
1756                         case IB_WC_SEND:
1757                                 rdma_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1758                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah, 0);
1759                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1760                                         = NULL;
1761                                 spin_lock(&tun_qp->tx_lock);
1762                                 tun_qp->tx_ix_tail++;
1763                                 spin_unlock(&tun_qp->tx_lock);
1764
1765                                 break;
1766                         default:
1767                                 break;
1768                         }
1769                 } else  {
1770                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1771                                  " status = %d, wrid = 0x%llx\n",
1772                                  ctx->slave, wc.status, wc.wr_id);
1773                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1774                                 rdma_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1775                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah, 0);
1776                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1777                                         = NULL;
1778                                 spin_lock(&tun_qp->tx_lock);
1779                                 tun_qp->tx_ix_tail++;
1780                                 spin_unlock(&tun_qp->tx_lock);
1781                         }
1782                 }
1783         }
1784 }
1785
1786 static void pv_qp_event_handler(struct ib_event *event, void *qp_context)
1787 {
1788         struct mlx4_ib_demux_pv_ctx *sqp = qp_context;
1789
1790         /* It's worse than that! He's dead, Jim! */
1791         pr_err("Fatal error (%d) on a MAD QP on port %d\n",
1792                event->event, sqp->port);
1793 }
1794
1795 static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx,
1796                             enum ib_qp_type qp_type, int create_tun)
1797 {
1798         int i, ret;
1799         struct mlx4_ib_demux_pv_qp *tun_qp;
1800         struct mlx4_ib_qp_tunnel_init_attr qp_init_attr;
1801         struct ib_qp_attr attr;
1802         int qp_attr_mask_INIT;
1803         const int nmbr_bufs = create_tun ? MLX4_NUM_TUNNEL_BUFS : MLX4_NUM_WIRE_BUFS;
1804
1805         if (qp_type > IB_QPT_GSI)
1806                 return -EINVAL;
1807
1808         tun_qp = &ctx->qp[qp_type];
1809
1810         memset(&qp_init_attr, 0, sizeof qp_init_attr);
1811         qp_init_attr.init_attr.send_cq = ctx->cq;
1812         qp_init_attr.init_attr.recv_cq = ctx->cq;
1813         qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
1814         qp_init_attr.init_attr.cap.max_send_wr = nmbr_bufs;
1815         qp_init_attr.init_attr.cap.max_recv_wr = nmbr_bufs;
1816         qp_init_attr.init_attr.cap.max_send_sge = 1;
1817         qp_init_attr.init_attr.cap.max_recv_sge = 1;
1818         if (create_tun) {
1819                 qp_init_attr.init_attr.qp_type = IB_QPT_UD;
1820                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_TUNNEL_QP;
1821                 qp_init_attr.port = ctx->port;
1822                 qp_init_attr.slave = ctx->slave;
1823                 qp_init_attr.proxy_qp_type = qp_type;
1824                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX |
1825                            IB_QP_QKEY | IB_QP_PORT;
1826         } else {
1827                 qp_init_attr.init_attr.qp_type = qp_type;
1828                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_SQP;
1829                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY;
1830         }
1831         qp_init_attr.init_attr.port_num = ctx->port;
1832         qp_init_attr.init_attr.qp_context = ctx;
1833         qp_init_attr.init_attr.event_handler = pv_qp_event_handler;
1834         tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr);
1835         if (IS_ERR(tun_qp->qp)) {
1836                 ret = PTR_ERR(tun_qp->qp);
1837                 tun_qp->qp = NULL;
1838                 pr_err("Couldn't create %s QP (%d)\n",
1839                        create_tun ? "tunnel" : "special", ret);
1840                 return ret;
1841         }
1842
1843         memset(&attr, 0, sizeof attr);
1844         attr.qp_state = IB_QPS_INIT;
1845         ret = 0;
1846         if (create_tun)
1847                 ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave,
1848                                               ctx->port, IB_DEFAULT_PKEY_FULL,
1849                                               &attr.pkey_index);
1850         if (ret || !create_tun)
1851                 attr.pkey_index =
1852                         to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0];
1853         attr.qkey = IB_QP1_QKEY;
1854         attr.port_num = ctx->port;
1855         ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT);
1856         if (ret) {
1857                 pr_err("Couldn't change %s qp state to INIT (%d)\n",
1858                        create_tun ? "tunnel" : "special", ret);
1859                 goto err_qp;
1860         }
1861         attr.qp_state = IB_QPS_RTR;
1862         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE);
1863         if (ret) {
1864                 pr_err("Couldn't change %s qp state to RTR (%d)\n",
1865                        create_tun ? "tunnel" : "special", ret);
1866                 goto err_qp;
1867         }
1868         attr.qp_state = IB_QPS_RTS;
1869         attr.sq_psn = 0;
1870         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN);
1871         if (ret) {
1872                 pr_err("Couldn't change %s qp state to RTS (%d)\n",
1873                        create_tun ? "tunnel" : "special", ret);
1874                 goto err_qp;
1875         }
1876
1877         for (i = 0; i < nmbr_bufs; i++) {
1878                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i);
1879                 if (ret) {
1880                         pr_err(" mlx4_ib_post_pv_buf error"
1881                                " (err = %d, i = %d)\n", ret, i);
1882                         goto err_qp;
1883                 }
1884         }
1885         return 0;
1886
1887 err_qp:
1888         ib_destroy_qp(tun_qp->qp);
1889         tun_qp->qp = NULL;
1890         return ret;
1891 }
1892
1893 /*
1894  * IB MAD completion callback for real SQPs
1895  */
1896 static void mlx4_ib_sqp_comp_worker(struct work_struct *work)
1897 {
1898         struct mlx4_ib_demux_pv_ctx *ctx;
1899         struct mlx4_ib_demux_pv_qp *sqp;
1900         struct ib_wc wc;
1901         struct ib_grh *grh;
1902         struct ib_mad *mad;
1903
1904         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1905         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1906
1907         while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1908                 sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1909                 if (wc.status == IB_WC_SUCCESS) {
1910                         switch (wc.opcode) {
1911                         case IB_WC_SEND:
1912                                 kfree(sqp->tx_ring[wc.wr_id &
1913                                       (MLX4_NUM_WIRE_BUFS - 1)].ah);
1914                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_WIRE_BUFS - 1)].ah
1915                                         = NULL;
1916                                 spin_lock(&sqp->tx_lock);
1917                                 sqp->tx_ix_tail++;
1918                                 spin_unlock(&sqp->tx_lock);
1919                                 break;
1920                         case IB_WC_RECV:
1921                                 mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *)
1922                                                 (sqp->ring[wc.wr_id &
1923                                                 (MLX4_NUM_WIRE_BUFS - 1)].addr))->payload);
1924                                 grh = &(((struct mlx4_mad_rcv_buf *)
1925                                                 (sqp->ring[wc.wr_id &
1926                                                 (MLX4_NUM_WIRE_BUFS - 1)].addr))->grh);
1927                                 mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad);
1928                                 if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id &
1929                                                            (MLX4_NUM_WIRE_BUFS - 1)))
1930                                         pr_err("Failed reposting SQP "
1931                                                "buf:%lld\n", wc.wr_id);
1932                                 break;
1933                         default:
1934                                 break;
1935                         }
1936                 } else  {
1937                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1938                                  " status = %d, wrid = 0x%llx\n",
1939                                  ctx->slave, wc.status, wc.wr_id);
1940                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1941                                 kfree(sqp->tx_ring[wc.wr_id &
1942                                       (MLX4_NUM_WIRE_BUFS - 1)].ah);
1943                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_WIRE_BUFS - 1)].ah
1944                                         = NULL;
1945                                 spin_lock(&sqp->tx_lock);
1946                                 sqp->tx_ix_tail++;
1947                                 spin_unlock(&sqp->tx_lock);
1948                         }
1949                 }
1950         }
1951 }
1952
1953 static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port,
1954                                struct mlx4_ib_demux_pv_ctx **ret_ctx)
1955 {
1956         struct mlx4_ib_demux_pv_ctx *ctx;
1957
1958         *ret_ctx = NULL;
1959         ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL);
1960         if (!ctx)
1961                 return -ENOMEM;
1962
1963         ctx->ib_dev = &dev->ib_dev;
1964         ctx->port = port;
1965         ctx->slave = slave;
1966         *ret_ctx = ctx;
1967         return 0;
1968 }
1969
1970 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port)
1971 {
1972         if (dev->sriov.demux[port - 1].tun[slave]) {
1973                 kfree(dev->sriov.demux[port - 1].tun[slave]);
1974                 dev->sriov.demux[port - 1].tun[slave] = NULL;
1975         }
1976 }
1977
1978 static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
1979                                int create_tun, struct mlx4_ib_demux_pv_ctx *ctx)
1980 {
1981         int ret, cq_size;
1982         struct ib_cq_init_attr cq_attr = {};
1983         const int nmbr_bufs = create_tun ? MLX4_NUM_TUNNEL_BUFS : MLX4_NUM_WIRE_BUFS;
1984
1985         if (ctx->state != DEMUX_PV_STATE_DOWN)
1986                 return -EEXIST;
1987
1988         ctx->state = DEMUX_PV_STATE_STARTING;
1989         /* have QP0 only if link layer is IB */
1990         if (rdma_port_get_link_layer(ibdev, ctx->port) ==
1991             IB_LINK_LAYER_INFINIBAND)
1992                 ctx->has_smi = 1;
1993
1994         if (ctx->has_smi) {
1995                 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun);
1996                 if (ret) {
1997                         pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret);
1998                         goto err_out;
1999                 }
2000         }
2001
2002         ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun);
2003         if (ret) {
2004                 pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret);
2005                 goto err_out_qp0;
2006         }
2007
2008         cq_size = 2 * nmbr_bufs;
2009         if (ctx->has_smi)
2010                 cq_size *= 2;
2011
2012         cq_attr.cqe = cq_size;
2013         ctx->cq = ib_create_cq(ctx->ib_dev,
2014                                create_tun ? mlx4_ib_tunnel_comp_handler : mlx4_ib_wire_comp_handler,
2015                                NULL, ctx, &cq_attr);
2016         if (IS_ERR(ctx->cq)) {
2017                 ret = PTR_ERR(ctx->cq);
2018                 pr_err("Couldn't create tunnel CQ (%d)\n", ret);
2019                 goto err_buf;
2020         }
2021
2022         ctx->pd = ib_alloc_pd(ctx->ib_dev, 0);
2023         if (IS_ERR(ctx->pd)) {
2024                 ret = PTR_ERR(ctx->pd);
2025                 pr_err("Couldn't create tunnel PD (%d)\n", ret);
2026                 goto err_cq;
2027         }
2028
2029         if (ctx->has_smi) {
2030                 ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun);
2031                 if (ret) {
2032                         pr_err("Couldn't create %s QP0 (%d)\n",
2033                                create_tun ? "tunnel for" : "",  ret);
2034                         goto err_pd;
2035                 }
2036         }
2037
2038         ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun);
2039         if (ret) {
2040                 pr_err("Couldn't create %s QP1 (%d)\n",
2041                        create_tun ? "tunnel for" : "",  ret);
2042                 goto err_qp0;
2043         }
2044
2045         if (create_tun)
2046                 INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker);
2047         else
2048                 INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker);
2049
2050         ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq;
2051         ctx->wi_wq = to_mdev(ibdev)->sriov.demux[port - 1].wi_wq;
2052
2053         ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
2054         if (ret) {
2055                 pr_err("Couldn't arm tunnel cq (%d)\n", ret);
2056                 goto err_wq;
2057         }
2058         ctx->state = DEMUX_PV_STATE_ACTIVE;
2059         return 0;
2060
2061 err_wq:
2062         ctx->wq = NULL;
2063         ib_destroy_qp(ctx->qp[1].qp);
2064         ctx->qp[1].qp = NULL;
2065
2066
2067 err_qp0:
2068         if (ctx->has_smi)
2069                 ib_destroy_qp(ctx->qp[0].qp);
2070         ctx->qp[0].qp = NULL;
2071
2072 err_pd:
2073         ib_dealloc_pd(ctx->pd);
2074         ctx->pd = NULL;
2075
2076 err_cq:
2077         ib_destroy_cq(ctx->cq);
2078         ctx->cq = NULL;
2079
2080 err_buf:
2081         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun);
2082
2083 err_out_qp0:
2084         if (ctx->has_smi)
2085                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun);
2086 err_out:
2087         ctx->state = DEMUX_PV_STATE_DOWN;
2088         return ret;
2089 }
2090
2091 static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port,
2092                                  struct mlx4_ib_demux_pv_ctx *ctx, int flush)
2093 {
2094         if (!ctx)
2095                 return;
2096         if (ctx->state > DEMUX_PV_STATE_DOWN) {
2097                 ctx->state = DEMUX_PV_STATE_DOWNING;
2098                 if (flush)
2099                         flush_workqueue(ctx->wq);
2100                 if (ctx->has_smi) {
2101                         ib_destroy_qp(ctx->qp[0].qp);
2102                         ctx->qp[0].qp = NULL;
2103                         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1);
2104                 }
2105                 ib_destroy_qp(ctx->qp[1].qp);
2106                 ctx->qp[1].qp = NULL;
2107                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1);
2108                 ib_dealloc_pd(ctx->pd);
2109                 ctx->pd = NULL;
2110                 ib_destroy_cq(ctx->cq);
2111                 ctx->cq = NULL;
2112                 ctx->state = DEMUX_PV_STATE_DOWN;
2113         }
2114 }
2115
2116 static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave,
2117                                   int port, int do_init)
2118 {
2119         int ret = 0;
2120
2121         if (!do_init) {
2122                 clean_vf_mcast(&dev->sriov.demux[port - 1], slave);
2123                 /* for master, destroy real sqp resources */
2124                 if (slave == mlx4_master_func_num(dev->dev))
2125                         destroy_pv_resources(dev, slave, port,
2126                                              dev->sriov.sqps[port - 1], 1);
2127                 /* destroy the tunnel qp resources */
2128                 destroy_pv_resources(dev, slave, port,
2129                                      dev->sriov.demux[port - 1].tun[slave], 1);
2130                 return 0;
2131         }
2132
2133         /* create the tunnel qp resources */
2134         ret = create_pv_resources(&dev->ib_dev, slave, port, 1,
2135                                   dev->sriov.demux[port - 1].tun[slave]);
2136
2137         /* for master, create the real sqp resources */
2138         if (!ret && slave == mlx4_master_func_num(dev->dev))
2139                 ret = create_pv_resources(&dev->ib_dev, slave, port, 0,
2140                                           dev->sriov.sqps[port - 1]);
2141         return ret;
2142 }
2143
2144 void mlx4_ib_tunnels_update_work(struct work_struct *work)
2145 {
2146         struct mlx4_ib_demux_work *dmxw;
2147
2148         dmxw = container_of(work, struct mlx4_ib_demux_work, work);
2149         mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port,
2150                                dmxw->do_init);
2151         kfree(dmxw);
2152         return;
2153 }
2154
2155 static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev,
2156                                        struct mlx4_ib_demux_ctx *ctx,
2157                                        int port)
2158 {
2159         char name[12];
2160         int ret = 0;
2161         int i;
2162
2163         ctx->tun = kcalloc(dev->dev->caps.sqp_demux,
2164                            sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL);
2165         if (!ctx->tun)
2166                 return -ENOMEM;
2167
2168         ctx->dev = dev;
2169         ctx->port = port;
2170         ctx->ib_dev = &dev->ib_dev;
2171
2172         for (i = 0;
2173              i < min(dev->dev->caps.sqp_demux,
2174              (u16)(dev->dev->persist->num_vfs + 1));
2175              i++) {
2176                 struct mlx4_active_ports actv_ports =
2177                         mlx4_get_active_ports(dev->dev, i);
2178
2179                 if (!test_bit(port - 1, actv_ports.ports))
2180                         continue;
2181
2182                 ret = alloc_pv_object(dev, i, port, &ctx->tun[i]);
2183                 if (ret) {
2184                         ret = -ENOMEM;
2185                         goto err_mcg;
2186                 }
2187         }
2188
2189         ret = mlx4_ib_mcg_port_init(ctx);
2190         if (ret) {
2191                 pr_err("Failed initializing mcg para-virt (%d)\n", ret);
2192                 goto err_mcg;
2193         }
2194
2195         snprintf(name, sizeof(name), "mlx4_ibt%d", port);
2196         ctx->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2197         if (!ctx->wq) {
2198                 pr_err("Failed to create tunnelling WQ for port %d\n", port);
2199                 ret = -ENOMEM;
2200                 goto err_wq;
2201         }
2202
2203         snprintf(name, sizeof(name), "mlx4_ibwi%d", port);
2204         ctx->wi_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2205         if (!ctx->wi_wq) {
2206                 pr_err("Failed to create wire WQ for port %d\n", port);
2207                 ret = -ENOMEM;
2208                 goto err_wiwq;
2209         }
2210
2211         snprintf(name, sizeof(name), "mlx4_ibud%d", port);
2212         ctx->ud_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2213         if (!ctx->ud_wq) {
2214                 pr_err("Failed to create up/down WQ for port %d\n", port);
2215                 ret = -ENOMEM;
2216                 goto err_udwq;
2217         }
2218
2219         return 0;
2220
2221 err_udwq:
2222         destroy_workqueue(ctx->wi_wq);
2223         ctx->wi_wq = NULL;
2224
2225 err_wiwq:
2226         destroy_workqueue(ctx->wq);
2227         ctx->wq = NULL;
2228
2229 err_wq:
2230         mlx4_ib_mcg_port_cleanup(ctx, 1);
2231 err_mcg:
2232         for (i = 0; i < dev->dev->caps.sqp_demux; i++)
2233                 free_pv_object(dev, i, port);
2234         kfree(ctx->tun);
2235         ctx->tun = NULL;
2236         return ret;
2237 }
2238
2239 static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx)
2240 {
2241         if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) {
2242                 sqp_ctx->state = DEMUX_PV_STATE_DOWNING;
2243                 flush_workqueue(sqp_ctx->wq);
2244                 if (sqp_ctx->has_smi) {
2245                         ib_destroy_qp(sqp_ctx->qp[0].qp);
2246                         sqp_ctx->qp[0].qp = NULL;
2247                         mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0);
2248                 }
2249                 ib_destroy_qp(sqp_ctx->qp[1].qp);
2250                 sqp_ctx->qp[1].qp = NULL;
2251                 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0);
2252                 ib_dealloc_pd(sqp_ctx->pd);
2253                 sqp_ctx->pd = NULL;
2254                 ib_destroy_cq(sqp_ctx->cq);
2255                 sqp_ctx->cq = NULL;
2256                 sqp_ctx->state = DEMUX_PV_STATE_DOWN;
2257         }
2258 }
2259
2260 static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx)
2261 {
2262         int i;
2263         if (ctx) {
2264                 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
2265                 mlx4_ib_mcg_port_cleanup(ctx, 1);
2266                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2267                         if (!ctx->tun[i])
2268                                 continue;
2269                         if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN)
2270                                 ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING;
2271                 }
2272                 flush_workqueue(ctx->wq);
2273                 flush_workqueue(ctx->wi_wq);
2274                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2275                         destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0);
2276                         free_pv_object(dev, i, ctx->port);
2277                 }
2278                 kfree(ctx->tun);
2279                 destroy_workqueue(ctx->ud_wq);
2280                 destroy_workqueue(ctx->wi_wq);
2281                 destroy_workqueue(ctx->wq);
2282         }
2283 }
2284
2285 static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init)
2286 {
2287         int i;
2288
2289         if (!mlx4_is_master(dev->dev))
2290                 return;
2291         /* initialize or tear down tunnel QPs for the master */
2292         for (i = 0; i < dev->dev->caps.num_ports; i++)
2293                 mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init);
2294         return;
2295 }
2296
2297 int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev)
2298 {
2299         int i = 0;
2300         int err;
2301
2302         if (!mlx4_is_mfunc(dev->dev))
2303                 return 0;
2304
2305         dev->sriov.is_going_down = 0;
2306         spin_lock_init(&dev->sriov.going_down_lock);
2307         mlx4_ib_cm_paravirt_init(dev);
2308
2309         mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n");
2310
2311         if (mlx4_is_slave(dev->dev)) {
2312                 mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n");
2313                 return 0;
2314         }
2315
2316         for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2317                 if (i == mlx4_master_func_num(dev->dev))
2318                         mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid);
2319                 else
2320                         mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid());
2321         }
2322
2323         err = mlx4_ib_init_alias_guid_service(dev);
2324         if (err) {
2325                 mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n");
2326                 goto paravirt_err;
2327         }
2328         err = mlx4_ib_device_register_sysfs(dev);
2329         if (err) {
2330                 mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n");
2331                 goto sysfs_err;
2332         }
2333
2334         mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n",
2335                      dev->dev->caps.sqp_demux);
2336         for (i = 0; i < dev->num_ports; i++) {
2337                 union ib_gid gid;
2338                 err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1);
2339                 if (err)
2340                         goto demux_err;
2341                 dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id;
2342                 atomic64_set(&dev->sriov.demux[i].subnet_prefix,
2343                              be64_to_cpu(gid.global.subnet_prefix));
2344                 err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1,
2345                                       &dev->sriov.sqps[i]);
2346                 if (err)
2347                         goto demux_err;
2348                 err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1);
2349                 if (err)
2350                         goto free_pv;
2351         }
2352         mlx4_ib_master_tunnels(dev, 1);
2353         return 0;
2354
2355 free_pv:
2356         free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2357 demux_err:
2358         while (--i >= 0) {
2359                 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2360                 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2361         }
2362         mlx4_ib_device_unregister_sysfs(dev);
2363
2364 sysfs_err:
2365         mlx4_ib_destroy_alias_guid_service(dev);
2366
2367 paravirt_err:
2368         mlx4_ib_cm_paravirt_clean(dev, -1);
2369
2370         return err;
2371 }
2372
2373 void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev)
2374 {
2375         int i;
2376         unsigned long flags;
2377
2378         if (!mlx4_is_mfunc(dev->dev))
2379                 return;
2380
2381         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
2382         dev->sriov.is_going_down = 1;
2383         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
2384         if (mlx4_is_master(dev->dev)) {
2385                 for (i = 0; i < dev->num_ports; i++) {
2386                         flush_workqueue(dev->sriov.demux[i].ud_wq);
2387                         mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]);
2388                         kfree(dev->sriov.sqps[i]);
2389                         dev->sriov.sqps[i] = NULL;
2390                         mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2391                 }
2392
2393                 mlx4_ib_cm_paravirt_clean(dev, -1);
2394                 mlx4_ib_destroy_alias_guid_service(dev);
2395                 mlx4_ib_device_unregister_sysfs(dev);
2396         }
2397 }