drivers/infiniband/hw/mlx4/mad.c

   1 /*
   2  * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <rdma/ib_mad.h>
  34 #include <rdma/ib_smi.h>
  35 #include <rdma/ib_sa.h>
  36 #include <rdma/ib_cache.h>
  37
  38 #include <linux/random.h>
  39 #include <linux/mlx4/cmd.h>
  40 #include <linux/gfp.h>
  41 #include <rdma/ib_pma.h>
  42
  43 #include <linux/mlx4/driver.h>
  44 #include "mlx4_ib.h"
  45
  46 enum {
  47         MLX4_IB_VENDOR_CLASS1 = 0x9,
  48         MLX4_IB_VENDOR_CLASS2 = 0xa
  49 };
  50
  51 #define MLX4_TUN_SEND_WRID_SHIFT 34
  52 #define MLX4_TUN_QPN_SHIFT 32
  53 #define MLX4_TUN_WRID_RECV (((u64) 1) << MLX4_TUN_SEND_WRID_SHIFT)
  54 #define MLX4_TUN_SET_WRID_QPN(a) (((u64) ((a) & 0x3)) << MLX4_TUN_QPN_SHIFT)
  55
  56 #define MLX4_TUN_IS_RECV(a)  (((a) >>  MLX4_TUN_SEND_WRID_SHIFT) & 0x1)
  57 #define MLX4_TUN_WRID_QPN(a) (((a) >> MLX4_TUN_QPN_SHIFT) & 0x3)
  58
  59  /* Port mgmt change event handling */
  60
  61 #define GET_BLK_PTR_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.block_ptr)
  62 #define GET_MASK_FROM_EQE(eqe) be32_to_cpu(eqe->event.port_mgmt_change.params.tbl_change_info.tbl_entries_mask)
  63 #define NUM_IDX_IN_PKEY_TBL_BLK 32
  64 #define GUID_TBL_ENTRY_SIZE 8      /* size in bytes */
  65 #define GUID_TBL_BLK_NUM_ENTRIES 8
  66 #define GUID_TBL_BLK_SIZE (GUID_TBL_ENTRY_SIZE * GUID_TBL_BLK_NUM_ENTRIES)
  67
  68 struct mlx4_mad_rcv_buf {
  69         struct ib_grh grh;
  70         u8 payload[256];
  71 } __packed;
  72
  73 struct mlx4_mad_snd_buf {
  74         u8 payload[256];
  75 } __packed;
  76
  77 struct mlx4_tunnel_mad {
  78         struct ib_grh grh;
  79         struct mlx4_ib_tunnel_header hdr;
  80         struct ib_mad mad;
  81 } __packed;
  82
  83 struct mlx4_rcv_tunnel_mad {
  84         struct mlx4_rcv_tunnel_hdr hdr;
  85         struct ib_grh grh;
  86         struct ib_mad mad;
  87 } __packed;
  88
  89 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num);
  90 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num);
  91 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
  92                                 int block, u32 change_bitmap);
  93
  94 __be64 mlx4_ib_gen_node_guid(void)
  95 {
  96 #define NODE_GUID_HI    ((u64) (((u64)IB_OPENIB_OUI) << 40))
  97         return cpu_to_be64(NODE_GUID_HI | prandom_u32());
  98 }
  99
 100 __be64 mlx4_ib_get_new_demux_tid(struct mlx4_ib_demux_ctx *ctx)
 101 {
 102         return cpu_to_be64(atomic_inc_return(&ctx->tid)) |
 103                 cpu_to_be64(0xff00000000000000LL);
 104 }
 105
 106 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int mad_ifc_flags,
 107                  int port, const struct ib_wc *in_wc,
 108                  const struct ib_grh *in_grh,
 109                  const void *in_mad, void *response_mad)
 110 {
 111         struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
 112         void *inbox;
 113         int err;
 114         u32 in_modifier = port;
 115         u8 op_modifier = 0;
 116
 117         inmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 118         if (IS_ERR(inmailbox))
 119                 return PTR_ERR(inmailbox);
 120         inbox = inmailbox->buf;
 121
 122         outmailbox = mlx4_alloc_cmd_mailbox(dev->dev);
 123         if (IS_ERR(outmailbox)) {
 124                 mlx4_free_cmd_mailbox(dev->dev, inmailbox);
 125                 return PTR_ERR(outmailbox);
 126         }
 127
 128         memcpy(inbox, in_mad, 256);
 129
 130         /*
 131          * Key check traps can't be generated unless we have in_wc to
 132          * tell us where to send the trap.
 133          */
 134         if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_MKEY) || !in_wc)
 135                 op_modifier |= 0x1;
 136         if ((mad_ifc_flags & MLX4_MAD_IFC_IGNORE_BKEY) || !in_wc)
 137                 op_modifier |= 0x2;
 138         if (mlx4_is_mfunc(dev->dev) &&
 139             (mad_ifc_flags & MLX4_MAD_IFC_NET_VIEW || in_wc))
 140                 op_modifier |= 0x8;
 141
 142         if (in_wc) {
 143                 struct {
 144                         __be32          my_qpn;
 145                         u32             reserved1;
 146                         __be32          rqpn;
 147                         u8              sl;
 148                         u8              g_path;
 149                         u16             reserved2[2];
 150                         __be16          pkey;
 151                         u32             reserved3[11];
 152                         u8              grh[40];
 153                 } *ext_info;
 154
 155                 memset(inbox + 256, 0, 256);
 156                 ext_info = inbox + 256;
 157
 158                 ext_info->my_qpn = cpu_to_be32(in_wc->qp->qp_num);
 159                 ext_info->rqpn   = cpu_to_be32(in_wc->src_qp);
 160                 ext_info->sl     = in_wc->sl << 4;
 161                 ext_info->g_path = in_wc->dlid_path_bits |
 162                         (in_wc->wc_flags & IB_WC_GRH ? 0x80 : 0);
 163                 ext_info->pkey   = cpu_to_be16(in_wc->pkey_index);
 164
 165                 if (in_grh)
 166                         memcpy(ext_info->grh, in_grh, 40);
 167
 168                 op_modifier |= 0x4;
 169
 170                 in_modifier |= in_wc->slid << 16;
 171         }
 172
 173         err = mlx4_cmd_box(dev->dev, inmailbox->dma, outmailbox->dma, in_modifier,
 174                            mlx4_is_master(dev->dev) ? (op_modifier & ~0x8) : op_modifier,
 175                            MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
 176                            (op_modifier & 0x8) ? MLX4_CMD_NATIVE : MLX4_CMD_WRAPPED);
 177
 178         if (!err)
 179                 memcpy(response_mad, outmailbox->buf, 256);
 180
 181         mlx4_free_cmd_mailbox(dev->dev, inmailbox);
 182         mlx4_free_cmd_mailbox(dev->dev, outmailbox);
 183
 184         return err;
 185 }
 186
 187 static void update_sm_ah(struct mlx4_ib_dev *dev, u8 port_num, u16 lid, u8 sl)
 188 {
 189         struct ib_ah *new_ah;
 190         struct ib_ah_attr ah_attr;
 191         unsigned long flags;
 192
 193         if (!dev->send_agent[port_num - 1][0])
 194                 return;
 195
 196         memset(&ah_attr, 0, sizeof ah_attr);
 197         ah_attr.dlid     = lid;
 198         ah_attr.sl       = sl;
 199         ah_attr.port_num = port_num;
 200
 201         new_ah = ib_create_ah(dev->send_agent[port_num - 1][0]->qp->pd,
 202                               &ah_attr);
 203         if (IS_ERR(new_ah))
 204                 return;
 205
 206         spin_lock_irqsave(&dev->sm_lock, flags);
 207         if (dev->sm_ah[port_num - 1])
 208                 ib_destroy_ah(dev->sm_ah[port_num - 1]);
 209         dev->sm_ah[port_num - 1] = new_ah;
 210         spin_unlock_irqrestore(&dev->sm_lock, flags);
 211 }
 212
 213 /*
 214  * Snoop SM MADs for port info, GUID info, and  P_Key table sets, so we can
 215  * synthesize LID change, Client-Rereg, GID change, and P_Key change events.
 216  */
 217 static void smp_snoop(struct ib_device *ibdev, u8 port_num, const struct ib_mad *mad,
 218                       u16 prev_lid)
 219 {
 220         struct ib_port_info *pinfo;
 221         u16 lid;
 222         __be16 *base;
 223         u32 bn, pkey_change_bitmap;
 224         int i;
 225
 226
 227         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 228         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 229              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 230             mad->mad_hdr.method == IB_MGMT_METHOD_SET)
 231                 switch (mad->mad_hdr.attr_id) {
 232                 case IB_SMP_ATTR_PORT_INFO:
 233                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
 234                                 return;
 235                         pinfo = (struct ib_port_info *) ((struct ib_smp *) mad)->data;
 236                         lid = be16_to_cpu(pinfo->lid);
 237
 238                         update_sm_ah(dev, port_num,
 239                                      be16_to_cpu(pinfo->sm_lid),
 240                                      pinfo->neighbormtu_mastersmsl & 0xf);
 241
 242                         if (pinfo->clientrereg_resv_subnetto & 0x80)
 243                                 handle_client_rereg_event(dev, port_num);
 244
 245                         if (prev_lid != lid)
 246                                 handle_lid_change_event(dev, port_num);
 247                         break;
 248
 249                 case IB_SMP_ATTR_PKEY_TABLE:
 250                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
 251                                 return;
 252                         if (!mlx4_is_mfunc(dev->dev)) {
 253                                 mlx4_ib_dispatch_event(dev, port_num,
 254                                                        IB_EVENT_PKEY_CHANGE);
 255                                 break;
 256                         }
 257
 258                         /* at this point, we are running in the master.
 259                          * Slaves do not receive SMPs.
 260                          */
 261                         bn  = be32_to_cpu(((struct ib_smp *)mad)->attr_mod) & 0xFFFF;
 262                         base = (__be16 *) &(((struct ib_smp *)mad)->data[0]);
 263                         pkey_change_bitmap = 0;
 264                         for (i = 0; i < 32; i++) {
 265                                 pr_debug("PKEY[%d] = x%x\n",
 266                                          i + bn*32, be16_to_cpu(base[i]));
 267                                 if (be16_to_cpu(base[i]) !=
 268                                     dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32]) {
 269                                         pkey_change_bitmap |= (1 << i);
 270                                         dev->pkeys.phys_pkey_cache[port_num - 1][i + bn*32] =
 271                                                 be16_to_cpu(base[i]);
 272                                 }
 273                         }
 274                         pr_debug("PKEY Change event: port=%d, "
 275                                  "block=0x%x, change_bitmap=0x%x\n",
 276                                  port_num, bn, pkey_change_bitmap);
 277
 278                         if (pkey_change_bitmap) {
 279                                 mlx4_ib_dispatch_event(dev, port_num,
 280                                                        IB_EVENT_PKEY_CHANGE);
 281                                 if (!dev->sriov.is_going_down)
 282                                         __propagate_pkey_ev(dev, port_num, bn,
 283                                                             pkey_change_bitmap);
 284                         }
 285                         break;
 286
 287                 case IB_SMP_ATTR_GUID_INFO:
 288                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV)
 289                                 return;
 290                         /* paravirtualized master's guid is guid 0 -- does not change */
 291                         if (!mlx4_is_master(dev->dev))
 292                                 mlx4_ib_dispatch_event(dev, port_num,
 293                                                        IB_EVENT_GID_CHANGE);
 294                         /*if master, notify relevant slaves*/
 295                         if (mlx4_is_master(dev->dev) &&
 296                             !dev->sriov.is_going_down) {
 297                                 bn = be32_to_cpu(((struct ib_smp *)mad)->attr_mod);
 298                                 mlx4_ib_update_cache_on_guid_change(dev, bn, port_num,
 299                                                                     (u8 *)(&((struct ib_smp *)mad)->data));
 300                                 mlx4_ib_notify_slaves_on_guid_change(dev, bn, port_num,
 301                                                                      (u8 *)(&((struct ib_smp *)mad)->data));
 302                         }
 303                         break;
 304
 305                 case IB_SMP_ATTR_SL_TO_VL_TABLE:
 306                         /* cache sl to vl mapping changes for use in
 307                          * filling QP1 LRH VL field when sending packets
 308                          */
 309                         if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_PORT_MNG_CHG_EV &&
 310                             dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)
 311                                 return;
 312                         if (!mlx4_is_slave(dev->dev)) {
 313                                 union sl2vl_tbl_to_u64 sl2vl64;
 314                                 int jj;
 315
 316                                 for (jj = 0; jj < 8; jj++) {
 317                                         sl2vl64.sl8[jj] = ((struct ib_smp *)mad)->data[jj];
 318                                         pr_debug("port %u, sl2vl[%d] = %02x\n",
 319                                                  port_num, jj, sl2vl64.sl8[jj]);
 320                                 }
 321                                 atomic64_set(&dev->sl2vl[port_num - 1], sl2vl64.sl64);
 322                         }
 323                         break;
 324
 325                 default:
 326                         break;
 327                 }
 328 }
 329
 330 static void __propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
 331                                 int block, u32 change_bitmap)
 332 {
 333         int i, ix, slave, err;
 334         int have_event = 0;
 335
 336         for (slave = 0; slave < dev->dev->caps.sqp_demux; slave++) {
 337                 if (slave == mlx4_master_func_num(dev->dev))
 338                         continue;
 339                 if (!mlx4_is_slave_active(dev->dev, slave))
 340                         continue;
 341
 342                 have_event = 0;
 343                 for (i = 0; i < 32; i++) {
 344                         if (!(change_bitmap & (1 << i)))
 345                                 continue;
 346                         for (ix = 0;
 347                              ix < dev->dev->caps.pkey_table_len[port_num]; ix++) {
 348                                 if (dev->pkeys.virt2phys_pkey[slave][port_num - 1]
 349                                     [ix] == i + 32 * block) {
 350                                         err = mlx4_gen_pkey_eqe(dev->dev, slave, port_num);
 351                                         pr_debug("propagate_pkey_ev: slave %d,"
 352                                                  " port %d, ix %d (%d)\n",
 353                                                  slave, port_num, ix, err);
 354                                         have_event = 1;
 355                                         break;
 356                                 }
 357                         }
 358                         if (have_event)
 359                                 break;
 360                 }
 361         }
 362 }
 363
 364 static void node_desc_override(struct ib_device *dev,
 365                                struct ib_mad *mad)
 366 {
 367         unsigned long flags;
 368
 369         if ((mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 370              mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 371             mad->mad_hdr.method == IB_MGMT_METHOD_GET_RESP &&
 372             mad->mad_hdr.attr_id == IB_SMP_ATTR_NODE_DESC) {
 373                 spin_lock_irqsave(&to_mdev(dev)->sm_lock, flags);
 374                 memcpy(((struct ib_smp *) mad)->data, dev->node_desc,
 375                        IB_DEVICE_NODE_DESC_MAX);
 376                 spin_unlock_irqrestore(&to_mdev(dev)->sm_lock, flags);
 377         }
 378 }
 379
 380 static void forward_trap(struct mlx4_ib_dev *dev, u8 port_num, const struct ib_mad *mad)
 381 {
 382         int qpn = mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_SUBN_LID_ROUTED;
 383         struct ib_mad_send_buf *send_buf;
 384         struct ib_mad_agent *agent = dev->send_agent[port_num - 1][qpn];
 385         int ret;
 386         unsigned long flags;
 387
 388         if (agent) {
 389                 send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
 390                                               IB_MGMT_MAD_DATA, GFP_ATOMIC,
 391                                               IB_MGMT_BASE_VERSION);
 392                 if (IS_ERR(send_buf))
 393                         return;
 394                 /*
 395                  * We rely here on the fact that MLX QPs don't use the
 396                  * address handle after the send is posted (this is
 397                  * wrong following the IB spec strictly, but we know
 398                  * it's OK for our devices).
 399                  */
 400                 spin_lock_irqsave(&dev->sm_lock, flags);
 401                 memcpy(send_buf->mad, mad, sizeof *mad);
 402                 if ((send_buf->ah = dev->sm_ah[port_num - 1]))
 403                         ret = ib_post_send_mad(send_buf, NULL);
 404                 else
 405                         ret = -EINVAL;
 406                 spin_unlock_irqrestore(&dev->sm_lock, flags);
 407
 408                 if (ret)
 409                         ib_free_send_mad(send_buf);
 410         }
 411 }
 412
 413 static int mlx4_ib_demux_sa_handler(struct ib_device *ibdev, int port, int slave,
 414                                                              struct ib_sa_mad *sa_mad)
 415 {
 416         int ret = 0;
 417
 418         /* dispatch to different sa handlers */
 419         switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
 420         case IB_SA_ATTR_MC_MEMBER_REC:
 421                 ret = mlx4_ib_mcg_demux_handler(ibdev, port, slave, sa_mad);
 422                 break;
 423         default:
 424                 break;
 425         }
 426         return ret;
 427 }
 428
 429 int mlx4_ib_find_real_gid(struct ib_device *ibdev, u8 port, __be64 guid)
 430 {
 431         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 432         int i;
 433
 434         for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
 435                 if (dev->sriov.demux[port - 1].guid_cache[i] == guid)
 436                         return i;
 437         }
 438         return -1;
 439 }
 440
 441
 442 static int find_slave_port_pkey_ix(struct mlx4_ib_dev *dev, int slave,
 443                                    u8 port, u16 pkey, u16 *ix)
 444 {
 445         int i, ret;
 446         u8 unassigned_pkey_ix, pkey_ix, partial_ix = 0xFF;
 447         u16 slot_pkey;
 448
 449         if (slave == mlx4_master_func_num(dev->dev))
 450                 return ib_find_cached_pkey(&dev->ib_dev, port, pkey, ix);
 451
 452         unassigned_pkey_ix = dev->dev->phys_caps.pkey_phys_table_len[port] - 1;
 453
 454         for (i = 0; i < dev->dev->caps.pkey_table_len[port]; i++) {
 455                 if (dev->pkeys.virt2phys_pkey[slave][port - 1][i] == unassigned_pkey_ix)
 456                         continue;
 457
 458                 pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][i];
 459
 460                 ret = ib_get_cached_pkey(&dev->ib_dev, port, pkey_ix, &slot_pkey);
 461                 if (ret)
 462                         continue;
 463                 if ((slot_pkey & 0x7FFF) == (pkey & 0x7FFF)) {
 464                         if (slot_pkey & 0x8000) {
 465                                 *ix = (u16) pkey_ix;
 466                                 return 0;
 467                         } else {
 468                                 /* take first partial pkey index found */
 469                                 if (partial_ix == 0xFF)
 470                                         partial_ix = pkey_ix;
 471                         }
 472                 }
 473         }
 474
 475         if (partial_ix < 0xFF) {
 476                 *ix = (u16) partial_ix;
 477                 return 0;
 478         }
 479
 480         return -EINVAL;
 481 }
 482
 483 int mlx4_ib_send_to_slave(struct mlx4_ib_dev *dev, int slave, u8 port,
 484                           enum ib_qp_type dest_qpt, struct ib_wc *wc,
 485                           struct ib_grh *grh, struct ib_mad *mad)
 486 {
 487         struct ib_sge list;
 488         struct ib_ud_wr wr;
 489         struct ib_send_wr *bad_wr;
 490         struct mlx4_ib_demux_pv_ctx *tun_ctx;
 491         struct mlx4_ib_demux_pv_qp *tun_qp;
 492         struct mlx4_rcv_tunnel_mad *tun_mad;
 493         struct ib_ah_attr attr;
 494         struct ib_ah *ah;
 495         struct ib_qp *src_qp = NULL;
 496         unsigned tun_tx_ix = 0;
 497         int dqpn;
 498         int ret = 0;
 499         u16 tun_pkey_ix;
 500         u16 cached_pkey;
 501         u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
 502
 503         if (dest_qpt > IB_QPT_GSI)
 504                 return -EINVAL;
 505
 506         tun_ctx = dev->sriov.demux[port-1].tun[slave];
 507
 508         /* check if proxy qp created */
 509         if (!tun_ctx || tun_ctx->state != DEMUX_PV_STATE_ACTIVE)
 510                 return -EAGAIN;
 511
 512         if (!dest_qpt)
 513                 tun_qp = &tun_ctx->qp[0];
 514         else
 515                 tun_qp = &tun_ctx->qp[1];
 516
 517         /* compute P_Key index to put in tunnel header for slave */
 518         if (dest_qpt) {
 519                 u16 pkey_ix;
 520                 ret = ib_get_cached_pkey(&dev->ib_dev, port, wc->pkey_index, &cached_pkey);
 521                 if (ret)
 522                         return -EINVAL;
 523
 524                 ret = find_slave_port_pkey_ix(dev, slave, port, cached_pkey, &pkey_ix);
 525                 if (ret)
 526                         return -EINVAL;
 527                 tun_pkey_ix = pkey_ix;
 528         } else
 529                 tun_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
 530
 531         dqpn = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave + port + (dest_qpt * 2) - 1;
 532
 533         /* get tunnel tx data buf for slave */
 534         src_qp = tun_qp->qp;
 535
 536         /* create ah. Just need an empty one with the port num for the post send.
 537          * The driver will set the force loopback bit in post_send */
 538         memset(&attr, 0, sizeof attr);
 539         attr.port_num = port;
 540         if (is_eth) {
 541                 memcpy(&attr.grh.dgid.raw[0], &grh->dgid.raw[0], 16);
 542                 attr.ah_flags = IB_AH_GRH;
 543         }
 544         ah = ib_create_ah(tun_ctx->pd, &attr);
 545         if (IS_ERR(ah))
 546                 return -ENOMEM;
 547
 548         /* allocate tunnel tx buf after pass failure returns */
 549         spin_lock(&tun_qp->tx_lock);
 550         if (tun_qp->tx_ix_head - tun_qp->tx_ix_tail >=
 551             (MLX4_NUM_TUNNEL_BUFS - 1))
 552                 ret = -EAGAIN;
 553         else
 554                 tun_tx_ix = (++tun_qp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
 555         spin_unlock(&tun_qp->tx_lock);
 556         if (ret)
 557                 goto end;
 558
 559         tun_mad = (struct mlx4_rcv_tunnel_mad *) (tun_qp->tx_ring[tun_tx_ix].buf.addr);
 560         if (tun_qp->tx_ring[tun_tx_ix].ah)
 561                 ib_destroy_ah(tun_qp->tx_ring[tun_tx_ix].ah);
 562         tun_qp->tx_ring[tun_tx_ix].ah = ah;
 563         ib_dma_sync_single_for_cpu(&dev->ib_dev,
 564                                    tun_qp->tx_ring[tun_tx_ix].buf.map,
 565                                    sizeof (struct mlx4_rcv_tunnel_mad),
 566                                    DMA_TO_DEVICE);
 567
 568         /* copy over to tunnel buffer */
 569         if (grh)
 570                 memcpy(&tun_mad->grh, grh, sizeof *grh);
 571         memcpy(&tun_mad->mad, mad, sizeof *mad);
 572
 573         /* adjust tunnel data */
 574         tun_mad->hdr.pkey_index = cpu_to_be16(tun_pkey_ix);
 575         tun_mad->hdr.flags_src_qp = cpu_to_be32(wc->src_qp & 0xFFFFFF);
 576         tun_mad->hdr.g_ml_path = (grh && (wc->wc_flags & IB_WC_GRH)) ? 0x80 : 0;
 577
 578         if (is_eth) {
 579                 u16 vlan = 0;
 580                 if (mlx4_get_slave_default_vlan(dev->dev, port, slave, &vlan,
 581                                                 NULL)) {
 582                         /* VST mode */
 583                         if (vlan != wc->vlan_id)
 584                                 /* Packet vlan is not the VST-assigned vlan.
 585                                  * Drop the packet.
 586                                  */
 587                                 goto out;
 588                          else
 589                                 /* Remove the vlan tag before forwarding
 590                                  * the packet to the VF.
 591                                  */
 592                                 vlan = 0xffff;
 593                 } else {
 594                         vlan = wc->vlan_id;
 595                 }
 596
 597                 tun_mad->hdr.sl_vid = cpu_to_be16(vlan);
 598                 memcpy((char *)&tun_mad->hdr.mac_31_0, &(wc->smac[0]), 4);
 599                 memcpy((char *)&tun_mad->hdr.slid_mac_47_32, &(wc->smac[4]), 2);
 600         } else {
 601                 tun_mad->hdr.sl_vid = cpu_to_be16(((u16)(wc->sl)) << 12);
 602                 tun_mad->hdr.slid_mac_47_32 = cpu_to_be16(wc->slid);
 603         }
 604
 605         ib_dma_sync_single_for_device(&dev->ib_dev,
 606                                       tun_qp->tx_ring[tun_tx_ix].buf.map,
 607                                       sizeof (struct mlx4_rcv_tunnel_mad),
 608                                       DMA_TO_DEVICE);
 609
 610         list.addr = tun_qp->tx_ring[tun_tx_ix].buf.map;
 611         list.length = sizeof (struct mlx4_rcv_tunnel_mad);
 612         list.lkey = tun_ctx->pd->local_dma_lkey;
 613
 614         wr.ah = ah;
 615         wr.port_num = port;
 616         wr.remote_qkey = IB_QP_SET_QKEY;
 617         wr.remote_qpn = dqpn;
 618         wr.wr.next = NULL;
 619         wr.wr.wr_id = ((u64) tun_tx_ix) | MLX4_TUN_SET_WRID_QPN(dest_qpt);
 620         wr.wr.sg_list = &list;
 621         wr.wr.num_sge = 1;
 622         wr.wr.opcode = IB_WR_SEND;
 623         wr.wr.send_flags = IB_SEND_SIGNALED;
 624
 625         ret = ib_post_send(src_qp, &wr.wr, &bad_wr);
 626         if (!ret)
 627                 return 0;
 628  out:
 629         spin_lock(&tun_qp->tx_lock);
 630         tun_qp->tx_ix_tail++;
 631         spin_unlock(&tun_qp->tx_lock);
 632         tun_qp->tx_ring[tun_tx_ix].ah = NULL;
 633 end:
 634         ib_destroy_ah(ah);
 635         return ret;
 636 }
 637
 638 static int mlx4_ib_demux_mad(struct ib_device *ibdev, u8 port,
 639                         struct ib_wc *wc, struct ib_grh *grh,
 640                         struct ib_mad *mad)
 641 {
 642         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 643         int err, other_port;
 644         int slave = -1;
 645         u8 *slave_id;
 646         int is_eth = 0;
 647
 648         if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
 649                 is_eth = 0;
 650         else
 651                 is_eth = 1;
 652
 653         if (is_eth) {
 654                 if (!(wc->wc_flags & IB_WC_GRH)) {
 655                         mlx4_ib_warn(ibdev, "RoCE grh not present.\n");
 656                         return -EINVAL;
 657                 }
 658                 if (mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_CM) {
 659                         mlx4_ib_warn(ibdev, "RoCE mgmt class is not CM\n");
 660                         return -EINVAL;
 661                 }
 662                 err = mlx4_get_slave_from_roce_gid(dev->dev, port, grh->dgid.raw, &slave);
 663                 if (err && mlx4_is_mf_bonded(dev->dev)) {
 664                         other_port = (port == 1) ? 2 : 1;
 665                         err = mlx4_get_slave_from_roce_gid(dev->dev, other_port, grh->dgid.raw, &slave);
 666                         if (!err) {
 667                                 port = other_port;
 668                                 pr_debug("resolved slave %d from gid %pI6 wire port %d other %d\n",
 669                                          slave, grh->dgid.raw, port, other_port);
 670                         }
 671                 }
 672                 if (err) {
 673                         mlx4_ib_warn(ibdev, "failed matching grh\n");
 674                         return -ENOENT;
 675                 }
 676                 if (slave >= dev->dev->caps.sqp_demux) {
 677                         mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 678                                      slave, dev->dev->caps.sqp_demux);
 679                         return -ENOENT;
 680                 }
 681
 682                 if (mlx4_ib_demux_cm_handler(ibdev, port, NULL, mad))
 683                         return 0;
 684
 685                 err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 686                 if (err)
 687                         pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
 688                                  slave, err);
 689                 return 0;
 690         }
 691
 692         /* Initially assume that this mad is for us */
 693         slave = mlx4_master_func_num(dev->dev);
 694
 695         /* See if the slave id is encoded in a response mad */
 696         if (mad->mad_hdr.method & 0x80) {
 697                 slave_id = (u8 *) &mad->mad_hdr.tid;
 698                 slave = *slave_id;
 699                 if (slave != 255) /*255 indicates the dom0*/
 700                         *slave_id = 0; /* remap tid */
 701         }
 702
 703         /* If a grh is present, we demux according to it */
 704         if (wc->wc_flags & IB_WC_GRH) {
 705                 slave = mlx4_ib_find_real_gid(ibdev, port, grh->dgid.global.interface_id);
 706                 if (slave < 0) {
 707                         mlx4_ib_warn(ibdev, "failed matching grh\n");
 708                         return -ENOENT;
 709                 }
 710         }
 711         /* Class-specific handling */
 712         switch (mad->mad_hdr.mgmt_class) {
 713         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
 714         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
 715                 /* 255 indicates the dom0 */
 716                 if (slave != 255 && slave != mlx4_master_func_num(dev->dev)) {
 717                         if (!mlx4_vf_smi_enabled(dev->dev, slave, port))
 718                                 return -EPERM;
 719                         /* for a VF. drop unsolicited MADs */
 720                         if (!(mad->mad_hdr.method & IB_MGMT_METHOD_RESP)) {
 721                                 mlx4_ib_warn(ibdev, "demux QP0. rejecting unsolicited mad for slave %d class 0x%x, method 0x%x\n",
 722                                              slave, mad->mad_hdr.mgmt_class,
 723                                              mad->mad_hdr.method);
 724                                 return -EINVAL;
 725                         }
 726                 }
 727                 break;
 728         case IB_MGMT_CLASS_SUBN_ADM:
 729                 if (mlx4_ib_demux_sa_handler(ibdev, port, slave,
 730                                              (struct ib_sa_mad *) mad))
 731                         return 0;
 732                 break;
 733         case IB_MGMT_CLASS_CM:
 734                 if (mlx4_ib_demux_cm_handler(ibdev, port, &slave, mad))
 735                         return 0;
 736                 break;
 737         case IB_MGMT_CLASS_DEVICE_MGMT:
 738                 if (mad->mad_hdr.method != IB_MGMT_METHOD_GET_RESP)
 739                         return 0;
 740                 break;
 741         default:
 742                 /* Drop unsupported classes for slaves in tunnel mode */
 743                 if (slave != mlx4_master_func_num(dev->dev)) {
 744                         pr_debug("dropping unsupported ingress mad from class:%d "
 745                                  "for slave:%d\n", mad->mad_hdr.mgmt_class, slave);
 746                         return 0;
 747                 }
 748         }
 749         /*make sure that no slave==255 was not handled yet.*/
 750         if (slave >= dev->dev->caps.sqp_demux) {
 751                 mlx4_ib_warn(ibdev, "slave id: %d is bigger than allowed:%d\n",
 752                              slave, dev->dev->caps.sqp_demux);
 753                 return -ENOENT;
 754         }
 755
 756         err = mlx4_ib_send_to_slave(dev, slave, port, wc->qp->qp_type, wc, grh, mad);
 757         if (err)
 758                 pr_debug("failed sending to slave %d via tunnel qp (%d)\n",
 759                          slave, err);
 760         return 0;
 761 }
 762
 763 static int ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 764                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 765                         const struct ib_mad *in_mad, struct ib_mad *out_mad)
 766 {
 767         u16 slid, prev_lid = 0;
 768         int err;
 769         struct ib_port_attr pattr;
 770
 771         if (in_wc && in_wc->qp->qp_num) {
 772                 pr_debug("received MAD: slid:%d sqpn:%d "
 773                         "dlid_bits:%d dqpn:%d wc_flags:0x%x, cls %x, mtd %x, atr %x\n",
 774                         in_wc->slid, in_wc->src_qp,
 775                         in_wc->dlid_path_bits,
 776                         in_wc->qp->qp_num,
 777                         in_wc->wc_flags,
 778                         in_mad->mad_hdr.mgmt_class, in_mad->mad_hdr.method,
 779                         be16_to_cpu(in_mad->mad_hdr.attr_id));
 780                 if (in_wc->wc_flags & IB_WC_GRH) {
 781                         pr_debug("sgid_hi:0x%016llx sgid_lo:0x%016llx\n",
 782                                  be64_to_cpu(in_grh->sgid.global.subnet_prefix),
 783                                  be64_to_cpu(in_grh->sgid.global.interface_id));
 784                         pr_debug("dgid_hi:0x%016llx dgid_lo:0x%016llx\n",
 785                                  be64_to_cpu(in_grh->dgid.global.subnet_prefix),
 786                                  be64_to_cpu(in_grh->dgid.global.interface_id));
 787                 }
 788         }
 789
 790         slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
 791
 792         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP && slid == 0) {
 793                 forward_trap(to_mdev(ibdev), port_num, in_mad);
 794                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 795         }
 796
 797         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 798             in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) {
 799                 if (in_mad->mad_hdr.method   != IB_MGMT_METHOD_GET &&
 800                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_SET &&
 801                     in_mad->mad_hdr.method   != IB_MGMT_METHOD_TRAP_REPRESS)
 802                         return IB_MAD_RESULT_SUCCESS;
 803
 804                 /*
 805                  * Don't process SMInfo queries -- the SMA can't handle them.
 806                  */
 807                 if (in_mad->mad_hdr.attr_id == IB_SMP_ATTR_SM_INFO)
 808                         return IB_MAD_RESULT_SUCCESS;
 809         } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
 810                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1   ||
 811                    in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2   ||
 812                    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
 813                 if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
 814                     in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
 815                         return IB_MAD_RESULT_SUCCESS;
 816         } else
 817                 return IB_MAD_RESULT_SUCCESS;
 818
 819         if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
 820              in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
 821             in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
 822             in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
 823             !ib_query_port(ibdev, port_num, &pattr))
 824                 prev_lid = pattr.lid;
 825
 826         err = mlx4_MAD_IFC(to_mdev(ibdev),
 827                            (mad_flags & IB_MAD_IGNORE_MKEY ? MLX4_MAD_IFC_IGNORE_MKEY : 0) |
 828                            (mad_flags & IB_MAD_IGNORE_BKEY ? MLX4_MAD_IFC_IGNORE_BKEY : 0) |
 829                            MLX4_MAD_IFC_NET_VIEW,
 830                            port_num, in_wc, in_grh, in_mad, out_mad);
 831         if (err)
 832                 return IB_MAD_RESULT_FAILURE;
 833
 834         if (!out_mad->mad_hdr.status) {
 835                 smp_snoop(ibdev, port_num, in_mad, prev_lid);
 836                 /* slaves get node desc from FW */
 837                 if (!mlx4_is_slave(to_mdev(ibdev)->dev))
 838                         node_desc_override(ibdev, out_mad);
 839         }
 840
 841         /* set return bit in status of directed route responses */
 842         if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)
 843                 out_mad->mad_hdr.status |= cpu_to_be16(1 << 15);
 844
 845         if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP_REPRESS)
 846                 /* no response for trap repress */
 847                 return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED;
 848
 849         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 850 }
 851
 852 static void edit_counter(struct mlx4_counter *cnt, void *counters,
 853                          __be16 attr_id)
 854 {
 855         switch (attr_id) {
 856         case IB_PMA_PORT_COUNTERS:
 857         {
 858                 struct ib_pma_portcounters *pma_cnt =
 859                         (struct ib_pma_portcounters *)counters;
 860
 861                 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_data,
 862                                      (be64_to_cpu(cnt->tx_bytes) >> 2));
 863                 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_data,
 864                                      (be64_to_cpu(cnt->rx_bytes) >> 2));
 865                 ASSIGN_32BIT_COUNTER(pma_cnt->port_xmit_packets,
 866                                      be64_to_cpu(cnt->tx_frames));
 867                 ASSIGN_32BIT_COUNTER(pma_cnt->port_rcv_packets,
 868                                      be64_to_cpu(cnt->rx_frames));
 869                 break;
 870         }
 871         case IB_PMA_PORT_COUNTERS_EXT:
 872         {
 873                 struct ib_pma_portcounters_ext *pma_cnt_ext =
 874                         (struct ib_pma_portcounters_ext *)counters;
 875
 876                 pma_cnt_ext->port_xmit_data =
 877                         cpu_to_be64(be64_to_cpu(cnt->tx_bytes) >> 2);
 878                 pma_cnt_ext->port_rcv_data =
 879                         cpu_to_be64(be64_to_cpu(cnt->rx_bytes) >> 2);
 880                 pma_cnt_ext->port_xmit_packets = cnt->tx_frames;
 881                 pma_cnt_ext->port_rcv_packets = cnt->rx_frames;
 882                 break;
 883         }
 884         }
 885 }
 886
 887 static int iboe_process_mad_port_info(void *out_mad)
 888 {
 889         struct ib_class_port_info cpi = {};
 890
 891         cpi.capability_mask = IB_PMA_CLASS_CAP_EXT_WIDTH;
 892         memcpy(out_mad, &cpi, sizeof(cpi));
 893         return IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 894 }
 895
 896 static int iboe_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 897                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 898                         const struct ib_mad *in_mad, struct ib_mad *out_mad)
 899 {
 900         struct mlx4_counter counter_stats;
 901         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 902         struct counter_index *tmp_counter;
 903         int err = IB_MAD_RESULT_FAILURE, stats_avail = 0;
 904
 905         if (in_mad->mad_hdr.mgmt_class != IB_MGMT_CLASS_PERF_MGMT)
 906                 return -EINVAL;
 907
 908         if (in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO)
 909                 return iboe_process_mad_port_info((void *)(out_mad->data + 40));
 910
 911         memset(&counter_stats, 0, sizeof(counter_stats));
 912         mutex_lock(&dev->counters_table[port_num - 1].mutex);
 913         list_for_each_entry(tmp_counter,
 914                             &dev->counters_table[port_num - 1].counters_list,
 915                             list) {
 916                 err = mlx4_get_counter_stats(dev->dev,
 917                                              tmp_counter->index,
 918                                              &counter_stats, 0);
 919                 if (err) {
 920                         err = IB_MAD_RESULT_FAILURE;
 921                         stats_avail = 0;
 922                         break;
 923                 }
 924                 stats_avail = 1;
 925         }
 926         mutex_unlock(&dev->counters_table[port_num - 1].mutex);
 927         if (stats_avail) {
 928                 memset(out_mad->data, 0, sizeof out_mad->data);
 929                 switch (counter_stats.counter_mode & 0xf) {
 930                 case 0:
 931                         edit_counter(&counter_stats,
 932                                      (void *)(out_mad->data + 40),
 933                                      in_mad->mad_hdr.attr_id);
 934                         err = IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY;
 935                         break;
 936                 default:
 937                         err = IB_MAD_RESULT_FAILURE;
 938                 }
 939         }
 940
 941         return err;
 942 }
 943
 944 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 945                         const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 946                         const struct ib_mad_hdr *in, size_t in_mad_size,
 947                         struct ib_mad_hdr *out, size_t *out_mad_size,
 948                         u16 *out_mad_pkey_index)
 949 {
 950         struct mlx4_ib_dev *dev = to_mdev(ibdev);
 951         const struct ib_mad *in_mad = (const struct ib_mad *)in;
 952         struct ib_mad *out_mad = (struct ib_mad *)out;
 953         enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num);
 954
 955         if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
 956                          *out_mad_size != sizeof(*out_mad)))
 957                 return IB_MAD_RESULT_FAILURE;
 958
 959         /* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA
 960          * queries, should be called only by VFs and for that specific purpose
 961          */
 962         if (link == IB_LINK_LAYER_INFINIBAND) {
 963                 if (mlx4_is_slave(dev->dev) &&
 964                     (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT &&
 965                      (in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS ||
 966                       in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS_EXT ||
 967                       in_mad->mad_hdr.attr_id == IB_PMA_CLASS_PORT_INFO)))
 968                         return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
 969                                                 in_grh, in_mad, out_mad);
 970
 971                 return ib_process_mad(ibdev, mad_flags, port_num, in_wc,
 972                                       in_grh, in_mad, out_mad);
 973         }
 974
 975         if (link == IB_LINK_LAYER_ETHERNET)
 976                 return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,
 977                                         in_grh, in_mad, out_mad);
 978
 979         return -EINVAL;
 980 }
 981
 982 static void send_handler(struct ib_mad_agent *agent,
 983                          struct ib_mad_send_wc *mad_send_wc)
 984 {
 985         if (mad_send_wc->send_buf->context[0])
 986                 ib_destroy_ah(mad_send_wc->send_buf->context[0]);
 987         ib_free_send_mad(mad_send_wc->send_buf);
 988 }
 989
 990 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
 991 {
 992         struct ib_mad_agent *agent;
 993         int p, q;
 994         int ret;
 995         enum rdma_link_layer ll;
 996
 997         for (p = 0; p < dev->num_ports; ++p) {
 998                 ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1);
 999                 for (q = 0; q <= 1; ++q) {
1000                         if (ll == IB_LINK_LAYER_INFINIBAND) {
1001                                 agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
1002                                                               q ? IB_QPT_GSI : IB_QPT_SMI,
1003                                                               NULL, 0, send_handler,
1004                                                               NULL, NULL, 0);
1005                                 if (IS_ERR(agent)) {
1006                                         ret = PTR_ERR(agent);
1007                                         goto err;
1008                                 }
1009                                 dev->send_agent[p][q] = agent;
1010                         } else
1011                                 dev->send_agent[p][q] = NULL;
1012                 }
1013         }
1014
1015         return 0;
1016
1017 err:
1018         for (p = 0; p < dev->num_ports; ++p)
1019                 for (q = 0; q <= 1; ++q)
1020                         if (dev->send_agent[p][q])
1021                                 ib_unregister_mad_agent(dev->send_agent[p][q]);
1022
1023         return ret;
1024 }
1025
1026 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
1027 {
1028         struct ib_mad_agent *agent;
1029         int p, q;
1030
1031         for (p = 0; p < dev->num_ports; ++p) {
1032                 for (q = 0; q <= 1; ++q) {
1033                         agent = dev->send_agent[p][q];
1034                         if (agent) {
1035                                 dev->send_agent[p][q] = NULL;
1036                                 ib_unregister_mad_agent(agent);
1037                         }
1038                 }
1039
1040                 if (dev->sm_ah[p])
1041                         ib_destroy_ah(dev->sm_ah[p]);
1042         }
1043 }
1044
1045 static void handle_lid_change_event(struct mlx4_ib_dev *dev, u8 port_num)
1046 {
1047         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_LID_CHANGE);
1048
1049         if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
1050                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
1051                                             MLX4_EQ_PORT_INFO_LID_CHANGE_MASK);
1052 }
1053
1054 static void handle_client_rereg_event(struct mlx4_ib_dev *dev, u8 port_num)
1055 {
1056         /* re-configure the alias-guid and mcg's */
1057         if (mlx4_is_master(dev->dev)) {
1058                 mlx4_ib_invalidate_all_guid_record(dev, port_num);
1059
1060                 if (!dev->sriov.is_going_down) {
1061                         mlx4_ib_mcg_port_cleanup(&dev->sriov.demux[port_num - 1], 0);
1062                         mlx4_gen_slaves_port_mgt_ev(dev->dev, port_num,
1063                                                     MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK);
1064                 }
1065         }
1066
1067         /* Update the sl to vl table from inside client rereg
1068          * only if in secure-host mode (snooping is not possible)
1069          * and the sl-to-vl change event is not generated by FW.
1070          */
1071         if (!mlx4_is_slave(dev->dev) &&
1072             dev->dev->flags & MLX4_FLAG_SECURE_HOST &&
1073             !(dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT)) {
1074                 if (mlx4_is_master(dev->dev))
1075                         /* already in work queue from mlx4_ib_event queueing
1076                          * mlx4_handle_port_mgmt_change_event, which calls
1077                          * this procedure. Therefore, call sl2vl_update directly.
1078                          */
1079                         mlx4_ib_sl2vl_update(dev, port_num);
1080                 else
1081                         mlx4_sched_ib_sl2vl_update_work(dev, port_num);
1082         }
1083         mlx4_ib_dispatch_event(dev, port_num, IB_EVENT_CLIENT_REREGISTER);
1084 }
1085
1086 static void propagate_pkey_ev(struct mlx4_ib_dev *dev, int port_num,
1087                               struct mlx4_eqe *eqe)
1088 {
1089         __propagate_pkey_ev(dev, port_num, GET_BLK_PTR_FROM_EQE(eqe),
1090                             GET_MASK_FROM_EQE(eqe));
1091 }
1092
1093 static void handle_slaves_guid_change(struct mlx4_ib_dev *dev, u8 port_num,
1094                                       u32 guid_tbl_blk_num, u32 change_bitmap)
1095 {
1096         struct ib_smp *in_mad  = NULL;
1097         struct ib_smp *out_mad  = NULL;
1098         u16 i;
1099
1100         if (!mlx4_is_mfunc(dev->dev) || !mlx4_is_master(dev->dev))
1101                 return;
1102
1103         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
1104         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1105         if (!in_mad || !out_mad)
1106                 goto out;
1107
1108         guid_tbl_blk_num  *= 4;
1109
1110         for (i = 0; i < 4; i++) {
1111                 if (change_bitmap && (!((change_bitmap >> (8 * i)) & 0xff)))
1112                         continue;
1113                 memset(in_mad, 0, sizeof *in_mad);
1114                 memset(out_mad, 0, sizeof *out_mad);
1115
1116                 in_mad->base_version  = 1;
1117                 in_mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
1118                 in_mad->class_version = 1;
1119                 in_mad->method        = IB_MGMT_METHOD_GET;
1120                 in_mad->attr_id       = IB_SMP_ATTR_GUID_INFO;
1121                 in_mad->attr_mod      = cpu_to_be32(guid_tbl_blk_num + i);
1122
1123                 if (mlx4_MAD_IFC(dev,
1124                                  MLX4_MAD_IFC_IGNORE_KEYS | MLX4_MAD_IFC_NET_VIEW,
1125                                  port_num, NULL, NULL, in_mad, out_mad)) {
1126                         mlx4_ib_warn(&dev->ib_dev, "Failed in get GUID INFO MAD_IFC\n");
1127                         goto out;
1128                 }
1129
1130                 mlx4_ib_update_cache_on_guid_change(dev, guid_tbl_blk_num + i,
1131                                                     port_num,
1132                                                     (u8 *)(&((struct ib_smp *)out_mad)->data));
1133                 mlx4_ib_notify_slaves_on_guid_change(dev, guid_tbl_blk_num + i,
1134                                                      port_num,
1135                                                      (u8 *)(&((struct ib_smp *)out_mad)->data));
1136         }
1137
1138 out:
1139         kfree(in_mad);
1140         kfree(out_mad);
1141         return;
1142 }
1143
1144 void handle_port_mgmt_change_event(struct work_struct *work)
1145 {
1146         struct ib_event_work *ew = container_of(work, struct ib_event_work, work);
1147         struct mlx4_ib_dev *dev = ew->ib_dev;
1148         struct mlx4_eqe *eqe = &(ew->ib_eqe);
1149         u8 port = eqe->event.port_mgmt_change.port;
1150         u32 changed_attr;
1151         u32 tbl_block;
1152         u32 change_bitmap;
1153
1154         switch (eqe->subtype) {
1155         case MLX4_DEV_PMC_SUBTYPE_PORT_INFO:
1156                 changed_attr = be32_to_cpu(eqe->event.port_mgmt_change.params.port_info.changed_attr);
1157
1158                 /* Update the SM ah - This should be done before handling
1159                    the other changed attributes so that MADs can be sent to the SM */
1160                 if (changed_attr & MSTR_SM_CHANGE_MASK) {
1161                         u16 lid = be16_to_cpu(eqe->event.port_mgmt_change.params.port_info.mstr_sm_lid);
1162                         u8 sl = eqe->event.port_mgmt_change.params.port_info.mstr_sm_sl & 0xf;
1163                         update_sm_ah(dev, port, lid, sl);
1164                 }
1165
1166                 /* Check if it is a lid change event */
1167                 if (changed_attr & MLX4_EQ_PORT_INFO_LID_CHANGE_MASK)
1168                         handle_lid_change_event(dev, port);
1169
1170                 /* Generate GUID changed event */
1171                 if (changed_attr & MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK) {
1172                         if (mlx4_is_master(dev->dev)) {
1173                                 union ib_gid gid;
1174                                 int err = 0;
1175
1176                                 if (!eqe->event.port_mgmt_change.params.port_info.gid_prefix)
1177                                         err = __mlx4_ib_query_gid(&dev->ib_dev, port, 0, &gid, 1);
1178                                 else
1179                                         gid.global.subnet_prefix =
1180                                                 eqe->event.port_mgmt_change.params.port_info.gid_prefix;
1181                                 if (err) {
1182                                         pr_warn("Could not change QP1 subnet prefix for port %d: query_gid error (%d)\n",
1183                                                 port, err);
1184                                 } else {
1185                                         pr_debug("Changing QP1 subnet prefix for port %d. old=0x%llx. new=0x%llx\n",
1186                                                  port,
1187                                                  (u64)atomic64_read(&dev->sriov.demux[port - 1].subnet_prefix),
1188                                                  be64_to_cpu(gid.global.subnet_prefix));
1189                                         atomic64_set(&dev->sriov.demux[port - 1].subnet_prefix,
1190                                                      be64_to_cpu(gid.global.subnet_prefix));
1191                                 }
1192                         }
1193                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1194                         /*if master, notify all slaves*/
1195                         if (mlx4_is_master(dev->dev))
1196                                 mlx4_gen_slaves_port_mgt_ev(dev->dev, port,
1197                                                             MLX4_EQ_PORT_INFO_GID_PFX_CHANGE_MASK);
1198                 }
1199
1200                 if (changed_attr & MLX4_EQ_PORT_INFO_CLIENT_REREG_MASK)
1201                         handle_client_rereg_event(dev, port);
1202                 break;
1203
1204         case MLX4_DEV_PMC_SUBTYPE_PKEY_TABLE:
1205                 mlx4_ib_dispatch_event(dev, port, IB_EVENT_PKEY_CHANGE);
1206                 if (mlx4_is_master(dev->dev) && !dev->sriov.is_going_down)
1207                         propagate_pkey_ev(dev, port, eqe);
1208                 break;
1209         case MLX4_DEV_PMC_SUBTYPE_GUID_INFO:
1210                 /* paravirtualized master's guid is guid 0 -- does not change */
1211                 if (!mlx4_is_master(dev->dev))
1212                         mlx4_ib_dispatch_event(dev, port, IB_EVENT_GID_CHANGE);
1213                 /*if master, notify relevant slaves*/
1214                 else if (!dev->sriov.is_going_down) {
1215                         tbl_block = GET_BLK_PTR_FROM_EQE(eqe);
1216                         change_bitmap = GET_MASK_FROM_EQE(eqe);
1217                         handle_slaves_guid_change(dev, port, tbl_block, change_bitmap);
1218                 }
1219                 break;
1220
1221         case MLX4_DEV_PMC_SUBTYPE_SL_TO_VL_MAP:
1222                 /* cache sl to vl mapping changes for use in
1223                  * filling QP1 LRH VL field when sending packets
1224                  */
1225                 if (!mlx4_is_slave(dev->dev)) {
1226                         union sl2vl_tbl_to_u64 sl2vl64;
1227                         int jj;
1228
1229                         for (jj = 0; jj < 8; jj++) {
1230                                 sl2vl64.sl8[jj] =
1231                                         eqe->event.port_mgmt_change.params.sl2vl_tbl_change_info.sl2vl_table[jj];
1232                                 pr_debug("port %u, sl2vl[%d] = %02x\n",
1233                                          port, jj, sl2vl64.sl8[jj]);
1234                         }
1235                         atomic64_set(&dev->sl2vl[port - 1], sl2vl64.sl64);
1236                 }
1237                 break;
1238         default:
1239                 pr_warn("Unsupported subtype 0x%x for "
1240                         "Port Management Change event\n", eqe->subtype);
1241         }
1242
1243         kfree(ew);
1244 }
1245
1246 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num,
1247                             enum ib_event_type type)
1248 {
1249         struct ib_event event;
1250
1251         event.device            = &dev->ib_dev;
1252         event.element.port_num  = port_num;
1253         event.event             = type;
1254
1255         ib_dispatch_event(&event);
1256 }
1257
1258 static void mlx4_ib_tunnel_comp_handler(struct ib_cq *cq, void *arg)
1259 {
1260         unsigned long flags;
1261         struct mlx4_ib_demux_pv_ctx *ctx = cq->cq_context;
1262         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1263         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
1264         if (!dev->sriov.is_going_down && ctx->state == DEMUX_PV_STATE_ACTIVE)
1265                 queue_work(ctx->wq, &ctx->work);
1266         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
1267 }
1268
1269 static int mlx4_ib_post_pv_qp_buf(struct mlx4_ib_demux_pv_ctx *ctx,
1270                                   struct mlx4_ib_demux_pv_qp *tun_qp,
1271                                   int index)
1272 {
1273         struct ib_sge sg_list;
1274         struct ib_recv_wr recv_wr, *bad_recv_wr;
1275         int size;
1276
1277         size = (tun_qp->qp->qp_type == IB_QPT_UD) ?
1278                 sizeof (struct mlx4_tunnel_mad) : sizeof (struct mlx4_mad_rcv_buf);
1279
1280         sg_list.addr = tun_qp->ring[index].map;
1281         sg_list.length = size;
1282         sg_list.lkey = ctx->pd->local_dma_lkey;
1283
1284         recv_wr.next = NULL;
1285         recv_wr.sg_list = &sg_list;
1286         recv_wr.num_sge = 1;
1287         recv_wr.wr_id = (u64) index | MLX4_TUN_WRID_RECV |
1288                 MLX4_TUN_SET_WRID_QPN(tun_qp->proxy_qpt);
1289         ib_dma_sync_single_for_device(ctx->ib_dev, tun_qp->ring[index].map,
1290                                       size, DMA_FROM_DEVICE);
1291         return ib_post_recv(tun_qp->qp, &recv_wr, &bad_recv_wr);
1292 }
1293
1294 static int mlx4_ib_multiplex_sa_handler(struct ib_device *ibdev, int port,
1295                 int slave, struct ib_sa_mad *sa_mad)
1296 {
1297         int ret = 0;
1298
1299         /* dispatch to different sa handlers */
1300         switch (be16_to_cpu(sa_mad->mad_hdr.attr_id)) {
1301         case IB_SA_ATTR_MC_MEMBER_REC:
1302                 ret = mlx4_ib_mcg_multiplex_handler(ibdev, port, slave, sa_mad);
1303                 break;
1304         default:
1305                 break;
1306         }
1307         return ret;
1308 }
1309
1310 static int is_proxy_qp0(struct mlx4_ib_dev *dev, int qpn, int slave)
1311 {
1312         int proxy_start = dev->dev->phys_caps.base_proxy_sqpn + 8 * slave;
1313
1314         return (qpn >= proxy_start && qpn <= proxy_start + 1);
1315 }
1316
1317
1318 int mlx4_ib_send_to_wire(struct mlx4_ib_dev *dev, int slave, u8 port,
1319                          enum ib_qp_type dest_qpt, u16 pkey_index,
1320                          u32 remote_qpn, u32 qkey, struct ib_ah_attr *attr,
1321                          u8 *s_mac, u16 vlan_id, struct ib_mad *mad)
1322 {
1323         struct ib_sge list;
1324         struct ib_ud_wr wr;
1325         struct ib_send_wr *bad_wr;
1326         struct mlx4_ib_demux_pv_ctx *sqp_ctx;
1327         struct mlx4_ib_demux_pv_qp *sqp;
1328         struct mlx4_mad_snd_buf *sqp_mad;
1329         struct ib_ah *ah;
1330         struct ib_qp *send_qp = NULL;
1331         unsigned wire_tx_ix = 0;
1332         int ret = 0;
1333         u16 wire_pkey_ix;
1334         int src_qpnum;
1335         u8 sgid_index;
1336
1337
1338         sqp_ctx = dev->sriov.sqps[port-1];
1339
1340         /* check if proxy qp created */
1341         if (!sqp_ctx || sqp_ctx->state != DEMUX_PV_STATE_ACTIVE)
1342                 return -EAGAIN;
1343
1344         if (dest_qpt == IB_QPT_SMI) {
1345                 src_qpnum = 0;
1346                 sqp = &sqp_ctx->qp[0];
1347                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][0];
1348         } else {
1349                 src_qpnum = 1;
1350                 sqp = &sqp_ctx->qp[1];
1351                 wire_pkey_ix = dev->pkeys.virt2phys_pkey[slave][port - 1][pkey_index];
1352         }
1353
1354         send_qp = sqp->qp;
1355
1356         /* create ah */
1357         sgid_index = attr->grh.sgid_index;
1358         attr->grh.sgid_index = 0;
1359         ah = ib_create_ah(sqp_ctx->pd, attr);
1360         if (IS_ERR(ah))
1361                 return -ENOMEM;
1362         attr->grh.sgid_index = sgid_index;
1363         to_mah(ah)->av.ib.gid_index = sgid_index;
1364         /* get rid of force-loopback bit */
1365         to_mah(ah)->av.ib.port_pd &= cpu_to_be32(0x7FFFFFFF);
1366         spin_lock(&sqp->tx_lock);
1367         if (sqp->tx_ix_head - sqp->tx_ix_tail >=
1368             (MLX4_NUM_TUNNEL_BUFS - 1))
1369                 ret = -EAGAIN;
1370         else
1371                 wire_tx_ix = (++sqp->tx_ix_head) & (MLX4_NUM_TUNNEL_BUFS - 1);
1372         spin_unlock(&sqp->tx_lock);
1373         if (ret)
1374                 goto out;
1375
1376         sqp_mad = (struct mlx4_mad_snd_buf *) (sqp->tx_ring[wire_tx_ix].buf.addr);
1377         if (sqp->tx_ring[wire_tx_ix].ah)
1378                 ib_destroy_ah(sqp->tx_ring[wire_tx_ix].ah);
1379         sqp->tx_ring[wire_tx_ix].ah = ah;
1380         ib_dma_sync_single_for_cpu(&dev->ib_dev,
1381                                    sqp->tx_ring[wire_tx_ix].buf.map,
1382                                    sizeof (struct mlx4_mad_snd_buf),
1383                                    DMA_TO_DEVICE);
1384
1385         memcpy(&sqp_mad->payload, mad, sizeof *mad);
1386
1387         ib_dma_sync_single_for_device(&dev->ib_dev,
1388                                       sqp->tx_ring[wire_tx_ix].buf.map,
1389                                       sizeof (struct mlx4_mad_snd_buf),
1390                                       DMA_TO_DEVICE);
1391
1392         list.addr = sqp->tx_ring[wire_tx_ix].buf.map;
1393         list.length = sizeof (struct mlx4_mad_snd_buf);
1394         list.lkey = sqp_ctx->pd->local_dma_lkey;
1395
1396         wr.ah = ah;
1397         wr.port_num = port;
1398         wr.pkey_index = wire_pkey_ix;
1399         wr.remote_qkey = qkey;
1400         wr.remote_qpn = remote_qpn;
1401         wr.wr.next = NULL;
1402         wr.wr.wr_id = ((u64) wire_tx_ix) | MLX4_TUN_SET_WRID_QPN(src_qpnum);
1403         wr.wr.sg_list = &list;
1404         wr.wr.num_sge = 1;
1405         wr.wr.opcode = IB_WR_SEND;
1406         wr.wr.send_flags = IB_SEND_SIGNALED;
1407         if (s_mac)
1408                 memcpy(to_mah(ah)->av.eth.s_mac, s_mac, 6);
1409         if (vlan_id < 0x1000)
1410                 vlan_id |= (attr->sl & 7) << 13;
1411         to_mah(ah)->av.eth.vlan = cpu_to_be16(vlan_id);
1412
1413
1414         ret = ib_post_send(send_qp, &wr.wr, &bad_wr);
1415         if (!ret)
1416                 return 0;
1417
1418         spin_lock(&sqp->tx_lock);
1419         sqp->tx_ix_tail++;
1420         spin_unlock(&sqp->tx_lock);
1421         sqp->tx_ring[wire_tx_ix].ah = NULL;
1422 out:
1423         ib_destroy_ah(ah);
1424         return ret;
1425 }
1426
1427 static int get_slave_base_gid_ix(struct mlx4_ib_dev *dev, int slave, int port)
1428 {
1429         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1430                 return slave;
1431         return mlx4_get_base_gid_ix(dev->dev, slave, port);
1432 }
1433
1434 static void fill_in_real_sgid_index(struct mlx4_ib_dev *dev, int slave, int port,
1435                                     struct ib_ah_attr *ah_attr)
1436 {
1437         if (rdma_port_get_link_layer(&dev->ib_dev, port) == IB_LINK_LAYER_INFINIBAND)
1438                 ah_attr->grh.sgid_index = slave;
1439         else
1440                 ah_attr->grh.sgid_index += get_slave_base_gid_ix(dev, slave, port);
1441 }
1442
1443 static void mlx4_ib_multiplex_mad(struct mlx4_ib_demux_pv_ctx *ctx, struct ib_wc *wc)
1444 {
1445         struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
1446         struct mlx4_ib_demux_pv_qp *tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc->wr_id)];
1447         int wr_ix = wc->wr_id & (MLX4_NUM_TUNNEL_BUFS - 1);
1448         struct mlx4_tunnel_mad *tunnel = tun_qp->ring[wr_ix].addr;
1449         struct mlx4_ib_ah ah;
1450         struct ib_ah_attr ah_attr;
1451         u8 *slave_id;
1452         int slave;
1453         int port;
1454         u16 vlan_id;
1455
1456         /* Get slave that sent this packet */
1457         if (wc->src_qp < dev->dev->phys_caps.base_proxy_sqpn ||
1458             wc->src_qp >= dev->dev->phys_caps.base_proxy_sqpn + 8 * MLX4_MFUNC_MAX ||
1459             (wc->src_qp & 0x1) != ctx->port - 1 ||
1460             wc->src_qp & 0x4) {
1461                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d\n", wc->src_qp);
1462                 return;
1463         }
1464         slave = ((wc->src_qp & ~0x7) - dev->dev->phys_caps.base_proxy_sqpn) / 8;
1465         if (slave != ctx->slave) {
1466                 mlx4_ib_warn(ctx->ib_dev, "can't multiplex bad sqp:%d: "
1467                              "belongs to another slave\n", wc->src_qp);
1468                 return;
1469         }
1470
1471         /* Map transaction ID */
1472         ib_dma_sync_single_for_cpu(ctx->ib_dev, tun_qp->ring[wr_ix].map,
1473                                    sizeof (struct mlx4_tunnel_mad),
1474                                    DMA_FROM_DEVICE);
1475         switch (tunnel->mad.mad_hdr.method) {
1476         case IB_MGMT_METHOD_SET:
1477         case IB_MGMT_METHOD_GET:
1478         case IB_MGMT_METHOD_REPORT:
1479         case IB_SA_METHOD_GET_TABLE:
1480         case IB_SA_METHOD_DELETE:
1481         case IB_SA_METHOD_GET_MULTI:
1482         case IB_SA_METHOD_GET_TRACE_TBL:
1483                 slave_id = (u8 *) &tunnel->mad.mad_hdr.tid;
1484                 if (*slave_id) {
1485                         mlx4_ib_warn(ctx->ib_dev, "egress mad has non-null tid msb:%d "
1486                                      "class:%d slave:%d\n", *slave_id,
1487                                      tunnel->mad.mad_hdr.mgmt_class, slave);
1488                         return;
1489                 } else
1490                         *slave_id = slave;
1491         default:
1492                 /* nothing */;
1493         }
1494
1495         /* Class-specific handling */
1496         switch (tunnel->mad.mad_hdr.mgmt_class) {
1497         case IB_MGMT_CLASS_SUBN_LID_ROUTED:
1498         case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
1499                 if (slave != mlx4_master_func_num(dev->dev) &&
1500                     !mlx4_vf_smi_enabled(dev->dev, slave, ctx->port))
1501                         return;
1502                 break;
1503         case IB_MGMT_CLASS_SUBN_ADM:
1504                 if (mlx4_ib_multiplex_sa_handler(ctx->ib_dev, ctx->port, slave,
1505                               (struct ib_sa_mad *) &tunnel->mad))
1506                         return;
1507                 break;
1508         case IB_MGMT_CLASS_CM:
1509                 if (mlx4_ib_multiplex_cm_handler(ctx->ib_dev, ctx->port, slave,
1510                               (struct ib_mad *) &tunnel->mad))
1511                         return;
1512                 break;
1513         case IB_MGMT_CLASS_DEVICE_MGMT:
1514                 if (tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_GET &&
1515                     tunnel->mad.mad_hdr.method != IB_MGMT_METHOD_SET)
1516                         return;
1517                 break;
1518         default:
1519                 /* Drop unsupported classes for slaves in tunnel mode */
1520                 if (slave != mlx4_master_func_num(dev->dev)) {
1521                         mlx4_ib_warn(ctx->ib_dev, "dropping unsupported egress mad from class:%d "
1522                                      "for slave:%d\n", tunnel->mad.mad_hdr.mgmt_class, slave);
1523                         return;
1524                 }
1525         }
1526
1527         /* We are using standard ib_core services to send the mad, so generate a
1528          * stadard address handle by decoding the tunnelled mlx4_ah fields */
1529         memcpy(&ah.av, &tunnel->hdr.av, sizeof (struct mlx4_av));
1530         ah.ibah.device = ctx->ib_dev;
1531
1532         port = be32_to_cpu(ah.av.ib.port_pd) >> 24;
1533         port = mlx4_slave_convert_port(dev->dev, slave, port);
1534         if (port < 0)
1535                 return;
1536         ah.av.ib.port_pd = cpu_to_be32(port << 24 | (be32_to_cpu(ah.av.ib.port_pd) & 0xffffff));
1537
1538         mlx4_ib_query_ah(&ah.ibah, &ah_attr);
1539         if (ah_attr.ah_flags & IB_AH_GRH)
1540                 fill_in_real_sgid_index(dev, slave, ctx->port, &ah_attr);
1541
1542         memcpy(ah_attr.dmac, tunnel->hdr.mac, 6);
1543         vlan_id = be16_to_cpu(tunnel->hdr.vlan);
1544         /* if slave have default vlan use it */
1545         mlx4_get_slave_default_vlan(dev->dev, ctx->port, slave,
1546                                     &vlan_id, &ah_attr.sl);
1547
1548         mlx4_ib_send_to_wire(dev, slave, ctx->port,
1549                              is_proxy_qp0(dev, wc->src_qp, slave) ?
1550                              IB_QPT_SMI : IB_QPT_GSI,
1551                              be16_to_cpu(tunnel->hdr.pkey_index),
1552                              be32_to_cpu(tunnel->hdr.remote_qpn),
1553                              be32_to_cpu(tunnel->hdr.qkey),
1554                              &ah_attr, wc->smac, vlan_id, &tunnel->mad);
1555 }
1556
1557 static int mlx4_ib_alloc_pv_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1558                                  enum ib_qp_type qp_type, int is_tun)
1559 {
1560         int i;
1561         struct mlx4_ib_demux_pv_qp *tun_qp;
1562         int rx_buf_size, tx_buf_size;
1563
1564         if (qp_type > IB_QPT_GSI)
1565                 return -EINVAL;
1566
1567         tun_qp = &ctx->qp[qp_type];
1568
1569         tun_qp->ring = kzalloc(sizeof (struct mlx4_ib_buf) * MLX4_NUM_TUNNEL_BUFS,
1570                                GFP_KERNEL);
1571         if (!tun_qp->ring)
1572                 return -ENOMEM;
1573
1574         tun_qp->tx_ring = kcalloc(MLX4_NUM_TUNNEL_BUFS,
1575                                   sizeof (struct mlx4_ib_tun_tx_buf),
1576                                   GFP_KERNEL);
1577         if (!tun_qp->tx_ring) {
1578                 kfree(tun_qp->ring);
1579                 tun_qp->ring = NULL;
1580                 return -ENOMEM;
1581         }
1582
1583         if (is_tun) {
1584                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1585                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1586         } else {
1587                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1588                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1589         }
1590
1591         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1592                 tun_qp->ring[i].addr = kmalloc(rx_buf_size, GFP_KERNEL);
1593                 if (!tun_qp->ring[i].addr)
1594                         goto err;
1595                 tun_qp->ring[i].map = ib_dma_map_single(ctx->ib_dev,
1596                                                         tun_qp->ring[i].addr,
1597                                                         rx_buf_size,
1598                                                         DMA_FROM_DEVICE);
1599                 if (ib_dma_mapping_error(ctx->ib_dev, tun_qp->ring[i].map)) {
1600                         kfree(tun_qp->ring[i].addr);
1601                         goto err;
1602                 }
1603         }
1604
1605         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1606                 tun_qp->tx_ring[i].buf.addr =
1607                         kmalloc(tx_buf_size, GFP_KERNEL);
1608                 if (!tun_qp->tx_ring[i].buf.addr)
1609                         goto tx_err;
1610                 tun_qp->tx_ring[i].buf.map =
1611                         ib_dma_map_single(ctx->ib_dev,
1612                                           tun_qp->tx_ring[i].buf.addr,
1613                                           tx_buf_size,
1614                                           DMA_TO_DEVICE);
1615                 if (ib_dma_mapping_error(ctx->ib_dev,
1616                                          tun_qp->tx_ring[i].buf.map)) {
1617                         kfree(tun_qp->tx_ring[i].buf.addr);
1618                         goto tx_err;
1619                 }
1620                 tun_qp->tx_ring[i].ah = NULL;
1621         }
1622         spin_lock_init(&tun_qp->tx_lock);
1623         tun_qp->tx_ix_head = 0;
1624         tun_qp->tx_ix_tail = 0;
1625         tun_qp->proxy_qpt = qp_type;
1626
1627         return 0;
1628
1629 tx_err:
1630         while (i > 0) {
1631                 --i;
1632                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1633                                     tx_buf_size, DMA_TO_DEVICE);
1634                 kfree(tun_qp->tx_ring[i].buf.addr);
1635         }
1636         kfree(tun_qp->tx_ring);
1637         tun_qp->tx_ring = NULL;
1638         i = MLX4_NUM_TUNNEL_BUFS;
1639 err:
1640         while (i > 0) {
1641                 --i;
1642                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1643                                     rx_buf_size, DMA_FROM_DEVICE);
1644                 kfree(tun_qp->ring[i].addr);
1645         }
1646         kfree(tun_qp->ring);
1647         tun_qp->ring = NULL;
1648         return -ENOMEM;
1649 }
1650
1651 static void mlx4_ib_free_pv_qp_bufs(struct mlx4_ib_demux_pv_ctx *ctx,
1652                                      enum ib_qp_type qp_type, int is_tun)
1653 {
1654         int i;
1655         struct mlx4_ib_demux_pv_qp *tun_qp;
1656         int rx_buf_size, tx_buf_size;
1657
1658         if (qp_type > IB_QPT_GSI)
1659                 return;
1660
1661         tun_qp = &ctx->qp[qp_type];
1662         if (is_tun) {
1663                 rx_buf_size = sizeof (struct mlx4_tunnel_mad);
1664                 tx_buf_size = sizeof (struct mlx4_rcv_tunnel_mad);
1665         } else {
1666                 rx_buf_size = sizeof (struct mlx4_mad_rcv_buf);
1667                 tx_buf_size = sizeof (struct mlx4_mad_snd_buf);
1668         }
1669
1670
1671         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1672                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->ring[i].map,
1673                                     rx_buf_size, DMA_FROM_DEVICE);
1674                 kfree(tun_qp->ring[i].addr);
1675         }
1676
1677         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1678                 ib_dma_unmap_single(ctx->ib_dev, tun_qp->tx_ring[i].buf.map,
1679                                     tx_buf_size, DMA_TO_DEVICE);
1680                 kfree(tun_qp->tx_ring[i].buf.addr);
1681                 if (tun_qp->tx_ring[i].ah)
1682                         ib_destroy_ah(tun_qp->tx_ring[i].ah);
1683         }
1684         kfree(tun_qp->tx_ring);
1685         kfree(tun_qp->ring);
1686 }
1687
1688 static void mlx4_ib_tunnel_comp_worker(struct work_struct *work)
1689 {
1690         struct mlx4_ib_demux_pv_ctx *ctx;
1691         struct mlx4_ib_demux_pv_qp *tun_qp;
1692         struct ib_wc wc;
1693         int ret;
1694         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1695         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1696
1697         while (ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1698                 tun_qp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1699                 if (wc.status == IB_WC_SUCCESS) {
1700                         switch (wc.opcode) {
1701                         case IB_WC_RECV:
1702                                 mlx4_ib_multiplex_mad(ctx, &wc);
1703                                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp,
1704                                                              wc.wr_id &
1705                                                              (MLX4_NUM_TUNNEL_BUFS - 1));
1706                                 if (ret)
1707                                         pr_err("Failed reposting tunnel "
1708                                                "buf:%lld\n", wc.wr_id);
1709                                 break;
1710                         case IB_WC_SEND:
1711                                 pr_debug("received tunnel send completion:"
1712                                          "wrid=0x%llx, status=0x%x\n",
1713                                          wc.wr_id, wc.status);
1714                                 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1715                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1716                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1717                                         = NULL;
1718                                 spin_lock(&tun_qp->tx_lock);
1719                                 tun_qp->tx_ix_tail++;
1720                                 spin_unlock(&tun_qp->tx_lock);
1721
1722                                 break;
1723                         default:
1724                                 break;
1725                         }
1726                 } else  {
1727                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1728                                  " status = %d, wrid = 0x%llx\n",
1729                                  ctx->slave, wc.status, wc.wr_id);
1730                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1731                                 ib_destroy_ah(tun_qp->tx_ring[wc.wr_id &
1732                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1733                                 tun_qp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1734                                         = NULL;
1735                                 spin_lock(&tun_qp->tx_lock);
1736                                 tun_qp->tx_ix_tail++;
1737                                 spin_unlock(&tun_qp->tx_lock);
1738                         }
1739                 }
1740         }
1741 }
1742
1743 static void pv_qp_event_handler(struct ib_event *event, void *qp_context)
1744 {
1745         struct mlx4_ib_demux_pv_ctx *sqp = qp_context;
1746
1747         /* It's worse than that! He's dead, Jim! */
1748         pr_err("Fatal error (%d) on a MAD QP on port %d\n",
1749                event->event, sqp->port);
1750 }
1751
1752 static int create_pv_sqp(struct mlx4_ib_demux_pv_ctx *ctx,
1753                             enum ib_qp_type qp_type, int create_tun)
1754 {
1755         int i, ret;
1756         struct mlx4_ib_demux_pv_qp *tun_qp;
1757         struct mlx4_ib_qp_tunnel_init_attr qp_init_attr;
1758         struct ib_qp_attr attr;
1759         int qp_attr_mask_INIT;
1760
1761         if (qp_type > IB_QPT_GSI)
1762                 return -EINVAL;
1763
1764         tun_qp = &ctx->qp[qp_type];
1765
1766         memset(&qp_init_attr, 0, sizeof qp_init_attr);
1767         qp_init_attr.init_attr.send_cq = ctx->cq;
1768         qp_init_attr.init_attr.recv_cq = ctx->cq;
1769         qp_init_attr.init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
1770         qp_init_attr.init_attr.cap.max_send_wr = MLX4_NUM_TUNNEL_BUFS;
1771         qp_init_attr.init_attr.cap.max_recv_wr = MLX4_NUM_TUNNEL_BUFS;
1772         qp_init_attr.init_attr.cap.max_send_sge = 1;
1773         qp_init_attr.init_attr.cap.max_recv_sge = 1;
1774         if (create_tun) {
1775                 qp_init_attr.init_attr.qp_type = IB_QPT_UD;
1776                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_TUNNEL_QP;
1777                 qp_init_attr.port = ctx->port;
1778                 qp_init_attr.slave = ctx->slave;
1779                 qp_init_attr.proxy_qp_type = qp_type;
1780                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX |
1781                            IB_QP_QKEY | IB_QP_PORT;
1782         } else {
1783                 qp_init_attr.init_attr.qp_type = qp_type;
1784                 qp_init_attr.init_attr.create_flags = MLX4_IB_SRIOV_SQP;
1785                 qp_attr_mask_INIT = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_QKEY;
1786         }
1787         qp_init_attr.init_attr.port_num = ctx->port;
1788         qp_init_attr.init_attr.qp_context = ctx;
1789         qp_init_attr.init_attr.event_handler = pv_qp_event_handler;
1790         tun_qp->qp = ib_create_qp(ctx->pd, &qp_init_attr.init_attr);
1791         if (IS_ERR(tun_qp->qp)) {
1792                 ret = PTR_ERR(tun_qp->qp);
1793                 tun_qp->qp = NULL;
1794                 pr_err("Couldn't create %s QP (%d)\n",
1795                        create_tun ? "tunnel" : "special", ret);
1796                 return ret;
1797         }
1798
1799         memset(&attr, 0, sizeof attr);
1800         attr.qp_state = IB_QPS_INIT;
1801         ret = 0;
1802         if (create_tun)
1803                 ret = find_slave_port_pkey_ix(to_mdev(ctx->ib_dev), ctx->slave,
1804                                               ctx->port, IB_DEFAULT_PKEY_FULL,
1805                                               &attr.pkey_index);
1806         if (ret || !create_tun)
1807                 attr.pkey_index =
1808                         to_mdev(ctx->ib_dev)->pkeys.virt2phys_pkey[ctx->slave][ctx->port - 1][0];
1809         attr.qkey = IB_QP1_QKEY;
1810         attr.port_num = ctx->port;
1811         ret = ib_modify_qp(tun_qp->qp, &attr, qp_attr_mask_INIT);
1812         if (ret) {
1813                 pr_err("Couldn't change %s qp state to INIT (%d)\n",
1814                        create_tun ? "tunnel" : "special", ret);
1815                 goto err_qp;
1816         }
1817         attr.qp_state = IB_QPS_RTR;
1818         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE);
1819         if (ret) {
1820                 pr_err("Couldn't change %s qp state to RTR (%d)\n",
1821                        create_tun ? "tunnel" : "special", ret);
1822                 goto err_qp;
1823         }
1824         attr.qp_state = IB_QPS_RTS;
1825         attr.sq_psn = 0;
1826         ret = ib_modify_qp(tun_qp->qp, &attr, IB_QP_STATE | IB_QP_SQ_PSN);
1827         if (ret) {
1828                 pr_err("Couldn't change %s qp state to RTS (%d)\n",
1829                        create_tun ? "tunnel" : "special", ret);
1830                 goto err_qp;
1831         }
1832
1833         for (i = 0; i < MLX4_NUM_TUNNEL_BUFS; i++) {
1834                 ret = mlx4_ib_post_pv_qp_buf(ctx, tun_qp, i);
1835                 if (ret) {
1836                         pr_err(" mlx4_ib_post_pv_buf error"
1837                                " (err = %d, i = %d)\n", ret, i);
1838                         goto err_qp;
1839                 }
1840         }
1841         return 0;
1842
1843 err_qp:
1844         ib_destroy_qp(tun_qp->qp);
1845         tun_qp->qp = NULL;
1846         return ret;
1847 }
1848
1849 /*
1850  * IB MAD completion callback for real SQPs
1851  */
1852 static void mlx4_ib_sqp_comp_worker(struct work_struct *work)
1853 {
1854         struct mlx4_ib_demux_pv_ctx *ctx;
1855         struct mlx4_ib_demux_pv_qp *sqp;
1856         struct ib_wc wc;
1857         struct ib_grh *grh;
1858         struct ib_mad *mad;
1859
1860         ctx = container_of(work, struct mlx4_ib_demux_pv_ctx, work);
1861         ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
1862
1863         while (mlx4_ib_poll_cq(ctx->cq, 1, &wc) == 1) {
1864                 sqp = &ctx->qp[MLX4_TUN_WRID_QPN(wc.wr_id)];
1865                 if (wc.status == IB_WC_SUCCESS) {
1866                         switch (wc.opcode) {
1867                         case IB_WC_SEND:
1868                                 ib_destroy_ah(sqp->tx_ring[wc.wr_id &
1869                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1870                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1871                                         = NULL;
1872                                 spin_lock(&sqp->tx_lock);
1873                                 sqp->tx_ix_tail++;
1874                                 spin_unlock(&sqp->tx_lock);
1875                                 break;
1876                         case IB_WC_RECV:
1877                                 mad = (struct ib_mad *) &(((struct mlx4_mad_rcv_buf *)
1878                                                 (sqp->ring[wc.wr_id &
1879                                                 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->payload);
1880                                 grh = &(((struct mlx4_mad_rcv_buf *)
1881                                                 (sqp->ring[wc.wr_id &
1882                                                 (MLX4_NUM_TUNNEL_BUFS - 1)].addr))->grh);
1883                                 mlx4_ib_demux_mad(ctx->ib_dev, ctx->port, &wc, grh, mad);
1884                                 if (mlx4_ib_post_pv_qp_buf(ctx, sqp, wc.wr_id &
1885                                                            (MLX4_NUM_TUNNEL_BUFS - 1)))
1886                                         pr_err("Failed reposting SQP "
1887                                                "buf:%lld\n", wc.wr_id);
1888                                 break;
1889                         default:
1890                                 BUG_ON(1);
1891                                 break;
1892                         }
1893                 } else  {
1894                         pr_debug("mlx4_ib: completion error in tunnel: %d."
1895                                  " status = %d, wrid = 0x%llx\n",
1896                                  ctx->slave, wc.status, wc.wr_id);
1897                         if (!MLX4_TUN_IS_RECV(wc.wr_id)) {
1898                                 ib_destroy_ah(sqp->tx_ring[wc.wr_id &
1899                                               (MLX4_NUM_TUNNEL_BUFS - 1)].ah);
1900                                 sqp->tx_ring[wc.wr_id & (MLX4_NUM_TUNNEL_BUFS - 1)].ah
1901                                         = NULL;
1902                                 spin_lock(&sqp->tx_lock);
1903                                 sqp->tx_ix_tail++;
1904                                 spin_unlock(&sqp->tx_lock);
1905                         }
1906                 }
1907         }
1908 }
1909
1910 static int alloc_pv_object(struct mlx4_ib_dev *dev, int slave, int port,
1911                                struct mlx4_ib_demux_pv_ctx **ret_ctx)
1912 {
1913         struct mlx4_ib_demux_pv_ctx *ctx;
1914
1915         *ret_ctx = NULL;
1916         ctx = kzalloc(sizeof (struct mlx4_ib_demux_pv_ctx), GFP_KERNEL);
1917         if (!ctx)
1918                 return -ENOMEM;
1919
1920         ctx->ib_dev = &dev->ib_dev;
1921         ctx->port = port;
1922         ctx->slave = slave;
1923         *ret_ctx = ctx;
1924         return 0;
1925 }
1926
1927 static void free_pv_object(struct mlx4_ib_dev *dev, int slave, int port)
1928 {
1929         if (dev->sriov.demux[port - 1].tun[slave]) {
1930                 kfree(dev->sriov.demux[port - 1].tun[slave]);
1931                 dev->sriov.demux[port - 1].tun[slave] = NULL;
1932         }
1933 }
1934
1935 static int create_pv_resources(struct ib_device *ibdev, int slave, int port,
1936                                int create_tun, struct mlx4_ib_demux_pv_ctx *ctx)
1937 {
1938         int ret, cq_size;
1939         struct ib_cq_init_attr cq_attr = {};
1940
1941         if (ctx->state != DEMUX_PV_STATE_DOWN)
1942                 return -EEXIST;
1943
1944         ctx->state = DEMUX_PV_STATE_STARTING;
1945         /* have QP0 only if link layer is IB */
1946         if (rdma_port_get_link_layer(ibdev, ctx->port) ==
1947             IB_LINK_LAYER_INFINIBAND)
1948                 ctx->has_smi = 1;
1949
1950         if (ctx->has_smi) {
1951                 ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_SMI, create_tun);
1952                 if (ret) {
1953                         pr_err("Failed allocating qp0 tunnel bufs (%d)\n", ret);
1954                         goto err_out;
1955                 }
1956         }
1957
1958         ret = mlx4_ib_alloc_pv_bufs(ctx, IB_QPT_GSI, create_tun);
1959         if (ret) {
1960                 pr_err("Failed allocating qp1 tunnel bufs (%d)\n", ret);
1961                 goto err_out_qp0;
1962         }
1963
1964         cq_size = 2 * MLX4_NUM_TUNNEL_BUFS;
1965         if (ctx->has_smi)
1966                 cq_size *= 2;
1967
1968         cq_attr.cqe = cq_size;
1969         ctx->cq = ib_create_cq(ctx->ib_dev, mlx4_ib_tunnel_comp_handler,
1970                                NULL, ctx, &cq_attr);
1971         if (IS_ERR(ctx->cq)) {
1972                 ret = PTR_ERR(ctx->cq);
1973                 pr_err("Couldn't create tunnel CQ (%d)\n", ret);
1974                 goto err_buf;
1975         }
1976
1977         ctx->pd = ib_alloc_pd(ctx->ib_dev, 0);
1978         if (IS_ERR(ctx->pd)) {
1979                 ret = PTR_ERR(ctx->pd);
1980                 pr_err("Couldn't create tunnel PD (%d)\n", ret);
1981                 goto err_cq;
1982         }
1983
1984         if (ctx->has_smi) {
1985                 ret = create_pv_sqp(ctx, IB_QPT_SMI, create_tun);
1986                 if (ret) {
1987                         pr_err("Couldn't create %s QP0 (%d)\n",
1988                                create_tun ? "tunnel for" : "",  ret);
1989                         goto err_pd;
1990                 }
1991         }
1992
1993         ret = create_pv_sqp(ctx, IB_QPT_GSI, create_tun);
1994         if (ret) {
1995                 pr_err("Couldn't create %s QP1 (%d)\n",
1996                        create_tun ? "tunnel for" : "",  ret);
1997                 goto err_qp0;
1998         }
1999
2000         if (create_tun)
2001                 INIT_WORK(&ctx->work, mlx4_ib_tunnel_comp_worker);
2002         else
2003                 INIT_WORK(&ctx->work, mlx4_ib_sqp_comp_worker);
2004
2005         ctx->wq = to_mdev(ibdev)->sriov.demux[port - 1].wq;
2006
2007         ret = ib_req_notify_cq(ctx->cq, IB_CQ_NEXT_COMP);
2008         if (ret) {
2009                 pr_err("Couldn't arm tunnel cq (%d)\n", ret);
2010                 goto err_wq;
2011         }
2012         ctx->state = DEMUX_PV_STATE_ACTIVE;
2013         return 0;
2014
2015 err_wq:
2016         ctx->wq = NULL;
2017         ib_destroy_qp(ctx->qp[1].qp);
2018         ctx->qp[1].qp = NULL;
2019
2020
2021 err_qp0:
2022         if (ctx->has_smi)
2023                 ib_destroy_qp(ctx->qp[0].qp);
2024         ctx->qp[0].qp = NULL;
2025
2026 err_pd:
2027         ib_dealloc_pd(ctx->pd);
2028         ctx->pd = NULL;
2029
2030 err_cq:
2031         ib_destroy_cq(ctx->cq);
2032         ctx->cq = NULL;
2033
2034 err_buf:
2035         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, create_tun);
2036
2037 err_out_qp0:
2038         if (ctx->has_smi)
2039                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, create_tun);
2040 err_out:
2041         ctx->state = DEMUX_PV_STATE_DOWN;
2042         return ret;
2043 }
2044
2045 static void destroy_pv_resources(struct mlx4_ib_dev *dev, int slave, int port,
2046                                  struct mlx4_ib_demux_pv_ctx *ctx, int flush)
2047 {
2048         if (!ctx)
2049                 return;
2050         if (ctx->state > DEMUX_PV_STATE_DOWN) {
2051                 ctx->state = DEMUX_PV_STATE_DOWNING;
2052                 if (flush)
2053                         flush_workqueue(ctx->wq);
2054                 if (ctx->has_smi) {
2055                         ib_destroy_qp(ctx->qp[0].qp);
2056                         ctx->qp[0].qp = NULL;
2057                         mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_SMI, 1);
2058                 }
2059                 ib_destroy_qp(ctx->qp[1].qp);
2060                 ctx->qp[1].qp = NULL;
2061                 mlx4_ib_free_pv_qp_bufs(ctx, IB_QPT_GSI, 1);
2062                 ib_dealloc_pd(ctx->pd);
2063                 ctx->pd = NULL;
2064                 ib_destroy_cq(ctx->cq);
2065                 ctx->cq = NULL;
2066                 ctx->state = DEMUX_PV_STATE_DOWN;
2067         }
2068 }
2069
2070 static int mlx4_ib_tunnels_update(struct mlx4_ib_dev *dev, int slave,
2071                                   int port, int do_init)
2072 {
2073         int ret = 0;
2074
2075         if (!do_init) {
2076                 clean_vf_mcast(&dev->sriov.demux[port - 1], slave);
2077                 /* for master, destroy real sqp resources */
2078                 if (slave == mlx4_master_func_num(dev->dev))
2079                         destroy_pv_resources(dev, slave, port,
2080                                              dev->sriov.sqps[port - 1], 1);
2081                 /* destroy the tunnel qp resources */
2082                 destroy_pv_resources(dev, slave, port,
2083                                      dev->sriov.demux[port - 1].tun[slave], 1);
2084                 return 0;
2085         }
2086
2087         /* create the tunnel qp resources */
2088         ret = create_pv_resources(&dev->ib_dev, slave, port, 1,
2089                                   dev->sriov.demux[port - 1].tun[slave]);
2090
2091         /* for master, create the real sqp resources */
2092         if (!ret && slave == mlx4_master_func_num(dev->dev))
2093                 ret = create_pv_resources(&dev->ib_dev, slave, port, 0,
2094                                           dev->sriov.sqps[port - 1]);
2095         return ret;
2096 }
2097
2098 void mlx4_ib_tunnels_update_work(struct work_struct *work)
2099 {
2100         struct mlx4_ib_demux_work *dmxw;
2101
2102         dmxw = container_of(work, struct mlx4_ib_demux_work, work);
2103         mlx4_ib_tunnels_update(dmxw->dev, dmxw->slave, (int) dmxw->port,
2104                                dmxw->do_init);
2105         kfree(dmxw);
2106         return;
2107 }
2108
2109 static int mlx4_ib_alloc_demux_ctx(struct mlx4_ib_dev *dev,
2110                                        struct mlx4_ib_demux_ctx *ctx,
2111                                        int port)
2112 {
2113         char name[12];
2114         int ret = 0;
2115         int i;
2116
2117         ctx->tun = kcalloc(dev->dev->caps.sqp_demux,
2118                            sizeof (struct mlx4_ib_demux_pv_ctx *), GFP_KERNEL);
2119         if (!ctx->tun)
2120                 return -ENOMEM;
2121
2122         ctx->dev = dev;
2123         ctx->port = port;
2124         ctx->ib_dev = &dev->ib_dev;
2125
2126         for (i = 0;
2127              i < min(dev->dev->caps.sqp_demux,
2128              (u16)(dev->dev->persist->num_vfs + 1));
2129              i++) {
2130                 struct mlx4_active_ports actv_ports =
2131                         mlx4_get_active_ports(dev->dev, i);
2132
2133                 if (!test_bit(port - 1, actv_ports.ports))
2134                         continue;
2135
2136                 ret = alloc_pv_object(dev, i, port, &ctx->tun[i]);
2137                 if (ret) {
2138                         ret = -ENOMEM;
2139                         goto err_mcg;
2140                 }
2141         }
2142
2143         ret = mlx4_ib_mcg_port_init(ctx);
2144         if (ret) {
2145                 pr_err("Failed initializing mcg para-virt (%d)\n", ret);
2146                 goto err_mcg;
2147         }
2148
2149         snprintf(name, sizeof name, "mlx4_ibt%d", port);
2150         ctx->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2151         if (!ctx->wq) {
2152                 pr_err("Failed to create tunnelling WQ for port %d\n", port);
2153                 ret = -ENOMEM;
2154                 goto err_wq;
2155         }
2156
2157         snprintf(name, sizeof name, "mlx4_ibud%d", port);
2158         ctx->ud_wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM);
2159         if (!ctx->ud_wq) {
2160                 pr_err("Failed to create up/down WQ for port %d\n", port);
2161                 ret = -ENOMEM;
2162                 goto err_udwq;
2163         }
2164
2165         return 0;
2166
2167 err_udwq:
2168         destroy_workqueue(ctx->wq);
2169         ctx->wq = NULL;
2170
2171 err_wq:
2172         mlx4_ib_mcg_port_cleanup(ctx, 1);
2173 err_mcg:
2174         for (i = 0; i < dev->dev->caps.sqp_demux; i++)
2175                 free_pv_object(dev, i, port);
2176         kfree(ctx->tun);
2177         ctx->tun = NULL;
2178         return ret;
2179 }
2180
2181 static void mlx4_ib_free_sqp_ctx(struct mlx4_ib_demux_pv_ctx *sqp_ctx)
2182 {
2183         if (sqp_ctx->state > DEMUX_PV_STATE_DOWN) {
2184                 sqp_ctx->state = DEMUX_PV_STATE_DOWNING;
2185                 flush_workqueue(sqp_ctx->wq);
2186                 if (sqp_ctx->has_smi) {
2187                         ib_destroy_qp(sqp_ctx->qp[0].qp);
2188                         sqp_ctx->qp[0].qp = NULL;
2189                         mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_SMI, 0);
2190                 }
2191                 ib_destroy_qp(sqp_ctx->qp[1].qp);
2192                 sqp_ctx->qp[1].qp = NULL;
2193                 mlx4_ib_free_pv_qp_bufs(sqp_ctx, IB_QPT_GSI, 0);
2194                 ib_dealloc_pd(sqp_ctx->pd);
2195                 sqp_ctx->pd = NULL;
2196                 ib_destroy_cq(sqp_ctx->cq);
2197                 sqp_ctx->cq = NULL;
2198                 sqp_ctx->state = DEMUX_PV_STATE_DOWN;
2199         }
2200 }
2201
2202 static void mlx4_ib_free_demux_ctx(struct mlx4_ib_demux_ctx *ctx)
2203 {
2204         int i;
2205         if (ctx) {
2206                 struct mlx4_ib_dev *dev = to_mdev(ctx->ib_dev);
2207                 mlx4_ib_mcg_port_cleanup(ctx, 1);
2208                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2209                         if (!ctx->tun[i])
2210                                 continue;
2211                         if (ctx->tun[i]->state > DEMUX_PV_STATE_DOWN)
2212                                 ctx->tun[i]->state = DEMUX_PV_STATE_DOWNING;
2213                 }
2214                 flush_workqueue(ctx->wq);
2215                 for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2216                         destroy_pv_resources(dev, i, ctx->port, ctx->tun[i], 0);
2217                         free_pv_object(dev, i, ctx->port);
2218                 }
2219                 kfree(ctx->tun);
2220                 destroy_workqueue(ctx->ud_wq);
2221                 destroy_workqueue(ctx->wq);
2222         }
2223 }
2224
2225 static void mlx4_ib_master_tunnels(struct mlx4_ib_dev *dev, int do_init)
2226 {
2227         int i;
2228
2229         if (!mlx4_is_master(dev->dev))
2230                 return;
2231         /* initialize or tear down tunnel QPs for the master */
2232         for (i = 0; i < dev->dev->caps.num_ports; i++)
2233                 mlx4_ib_tunnels_update(dev, mlx4_master_func_num(dev->dev), i + 1, do_init);
2234         return;
2235 }
2236
2237 int mlx4_ib_init_sriov(struct mlx4_ib_dev *dev)
2238 {
2239         int i = 0;
2240         int err;
2241
2242         if (!mlx4_is_mfunc(dev->dev))
2243                 return 0;
2244
2245         dev->sriov.is_going_down = 0;
2246         spin_lock_init(&dev->sriov.going_down_lock);
2247         mlx4_ib_cm_paravirt_init(dev);
2248
2249         mlx4_ib_warn(&dev->ib_dev, "multi-function enabled\n");
2250
2251         if (mlx4_is_slave(dev->dev)) {
2252                 mlx4_ib_warn(&dev->ib_dev, "operating in qp1 tunnel mode\n");
2253                 return 0;
2254         }
2255
2256         for (i = 0; i < dev->dev->caps.sqp_demux; i++) {
2257                 if (i == mlx4_master_func_num(dev->dev))
2258                         mlx4_put_slave_node_guid(dev->dev, i, dev->ib_dev.node_guid);
2259                 else
2260                         mlx4_put_slave_node_guid(dev->dev, i, mlx4_ib_gen_node_guid());
2261         }
2262
2263         err = mlx4_ib_init_alias_guid_service(dev);
2264         if (err) {
2265                 mlx4_ib_warn(&dev->ib_dev, "Failed init alias guid process.\n");
2266                 goto paravirt_err;
2267         }
2268         err = mlx4_ib_device_register_sysfs(dev);
2269         if (err) {
2270                 mlx4_ib_warn(&dev->ib_dev, "Failed to register sysfs\n");
2271                 goto sysfs_err;
2272         }
2273
2274         mlx4_ib_warn(&dev->ib_dev, "initializing demux service for %d qp1 clients\n",
2275                      dev->dev->caps.sqp_demux);
2276         for (i = 0; i < dev->num_ports; i++) {
2277                 union ib_gid gid;
2278                 err = __mlx4_ib_query_gid(&dev->ib_dev, i + 1, 0, &gid, 1);
2279                 if (err)
2280                         goto demux_err;
2281                 dev->sriov.demux[i].guid_cache[0] = gid.global.interface_id;
2282                 atomic64_set(&dev->sriov.demux[i].subnet_prefix,
2283                              be64_to_cpu(gid.global.subnet_prefix));
2284                 err = alloc_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1,
2285                                       &dev->sriov.sqps[i]);
2286                 if (err)
2287                         goto demux_err;
2288                 err = mlx4_ib_alloc_demux_ctx(dev, &dev->sriov.demux[i], i + 1);
2289                 if (err)
2290                         goto free_pv;
2291         }
2292         mlx4_ib_master_tunnels(dev, 1);
2293         return 0;
2294
2295 free_pv:
2296         free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2297 demux_err:
2298         while (--i >= 0) {
2299                 free_pv_object(dev, mlx4_master_func_num(dev->dev), i + 1);
2300                 mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2301         }
2302         mlx4_ib_device_unregister_sysfs(dev);
2303
2304 sysfs_err:
2305         mlx4_ib_destroy_alias_guid_service(dev);
2306
2307 paravirt_err:
2308         mlx4_ib_cm_paravirt_clean(dev, -1);
2309
2310         return err;
2311 }
2312
2313 void mlx4_ib_close_sriov(struct mlx4_ib_dev *dev)
2314 {
2315         int i;
2316         unsigned long flags;
2317
2318         if (!mlx4_is_mfunc(dev->dev))
2319                 return;
2320
2321         spin_lock_irqsave(&dev->sriov.going_down_lock, flags);
2322         dev->sriov.is_going_down = 1;
2323         spin_unlock_irqrestore(&dev->sriov.going_down_lock, flags);
2324         if (mlx4_is_master(dev->dev)) {
2325                 for (i = 0; i < dev->num_ports; i++) {
2326                         flush_workqueue(dev->sriov.demux[i].ud_wq);
2327                         mlx4_ib_free_sqp_ctx(dev->sriov.sqps[i]);
2328                         kfree(dev->sriov.sqps[i]);
2329                         dev->sriov.sqps[i] = NULL;
2330                         mlx4_ib_free_demux_ctx(&dev->sriov.demux[i]);
2331                 }
2332
2333                 mlx4_ib_cm_paravirt_clean(dev, -1);
2334                 mlx4_ib_destroy_alias_guid_service(dev);
2335                 mlx4_ib_device_unregister_sysfs(dev);
2336         }
2337 }