drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c

   1 /*
   2  * Copyright (c) 2017, Mellanox Technologies. 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_verbs.h>
  34 #include <linux/mlx5/fs.h>
  35 #include "en.h"
  36 #include "ipoib.h"
  37
  38 #define IB_DEFAULT_Q_KEY   0xb1b
  39 #define MLX5I_PARAMS_DEFAULT_LOG_RQ_SIZE 9
  40
  41 static int mlx5i_open(struct net_device *netdev);
  42 static int mlx5i_close(struct net_device *netdev);
  43 static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu);
  44 static int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
  45
  46 static const struct net_device_ops mlx5i_netdev_ops = {
  47         .ndo_open                = mlx5i_open,
  48         .ndo_stop                = mlx5i_close,
  49         .ndo_init                = mlx5i_dev_init,
  50         .ndo_uninit              = mlx5i_dev_cleanup,
  51         .ndo_change_mtu          = mlx5i_change_mtu,
  52         .ndo_do_ioctl            = mlx5i_ioctl,
  53 };
  54
  55 /* IPoIB mlx5 netdev profile */
  56 static void mlx5i_build_nic_params(struct mlx5_core_dev *mdev,
  57                                    struct mlx5e_params *params)
  58 {
  59         /* Override RQ params as IPoIB supports only LINKED LIST RQ for now */
  60         mlx5e_init_rq_type_params(mdev, params, MLX5_WQ_TYPE_LINKED_LIST);
  61
  62         /* RQ size in ipoib by default is 512 */
  63         params->log_rq_size = is_kdump_kernel() ?
  64                 MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE :
  65                 MLX5I_PARAMS_DEFAULT_LOG_RQ_SIZE;
  66
  67         params->lro_en = false;
  68 }
  69
  70 /* Called directly after IPoIB netdevice was created to initialize SW structs */
  71 void mlx5i_init(struct mlx5_core_dev *mdev,
  72                 struct net_device *netdev,
  73                 const struct mlx5e_profile *profile,
  74                 void *ppriv)
  75 {
  76         struct mlx5e_priv *priv  = mlx5i_epriv(netdev);
  77
  78         /* priv init */
  79         priv->mdev        = mdev;
  80         priv->netdev      = netdev;
  81         priv->profile     = profile;
  82         priv->ppriv       = ppriv;
  83         priv->hard_mtu = MLX5_IB_GRH_BYTES + MLX5_IPOIB_HARD_LEN;
  84         mutex_init(&priv->state_lock);
  85
  86         mlx5e_build_nic_params(mdev, &priv->channels.params, profile->max_nch(mdev));
  87         mlx5i_build_nic_params(mdev, &priv->channels.params);
  88
  89         /* netdev init */
  90         netdev->hw_features    |= NETIF_F_SG;
  91         netdev->hw_features    |= NETIF_F_IP_CSUM;
  92         netdev->hw_features    |= NETIF_F_IPV6_CSUM;
  93         netdev->hw_features    |= NETIF_F_GRO;
  94         netdev->hw_features    |= NETIF_F_TSO;
  95         netdev->hw_features    |= NETIF_F_TSO6;
  96         netdev->hw_features    |= NETIF_F_RXCSUM;
  97         netdev->hw_features    |= NETIF_F_RXHASH;
  98
  99         netdev->netdev_ops = &mlx5i_netdev_ops;
 100         netdev->ethtool_ops = &mlx5i_ethtool_ops;
 101 }
 102
 103 /* Called directly before IPoIB netdevice is destroyed to cleanup SW structs */
 104 static void mlx5i_cleanup(struct mlx5e_priv *priv)
 105 {
 106         /* Do nothing .. */
 107 }
 108
 109 int mlx5i_init_underlay_qp(struct mlx5e_priv *priv)
 110 {
 111         struct mlx5_core_dev *mdev = priv->mdev;
 112         struct mlx5i_priv *ipriv = priv->ppriv;
 113         struct mlx5_core_qp *qp = &ipriv->qp;
 114         struct mlx5_qp_context *context;
 115         int ret;
 116
 117         /* QP states */
 118         context = kzalloc(sizeof(*context), GFP_KERNEL);
 119         if (!context)
 120                 return -ENOMEM;
 121
 122         context->flags = cpu_to_be32(MLX5_QP_PM_MIGRATED << 11);
 123         context->pri_path.port = 1;
 124         context->pri_path.pkey_index = cpu_to_be16(ipriv->pkey_index);
 125         context->qkey = cpu_to_be32(IB_DEFAULT_Q_KEY);
 126
 127         ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RST2INIT_QP, 0, context, qp);
 128         if (ret) {
 129                 mlx5_core_err(mdev, "Failed to modify qp RST2INIT, err: %d\n", ret);
 130                 goto err_qp_modify_to_err;
 131         }
 132         memset(context, 0, sizeof(*context));
 133
 134         ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_INIT2RTR_QP, 0, context, qp);
 135         if (ret) {
 136                 mlx5_core_err(mdev, "Failed to modify qp INIT2RTR, err: %d\n", ret);
 137                 goto err_qp_modify_to_err;
 138         }
 139
 140         ret = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_RTR2RTS_QP, 0, context, qp);
 141         if (ret) {
 142                 mlx5_core_err(mdev, "Failed to modify qp RTR2RTS, err: %d\n", ret);
 143                 goto err_qp_modify_to_err;
 144         }
 145
 146         kfree(context);
 147         return 0;
 148
 149 err_qp_modify_to_err:
 150         mlx5_core_qp_modify(mdev, MLX5_CMD_OP_2ERR_QP, 0, &context, qp);
 151         kfree(context);
 152         return ret;
 153 }
 154
 155 void mlx5i_uninit_underlay_qp(struct mlx5e_priv *priv)
 156 {
 157         struct mlx5i_priv *ipriv = priv->ppriv;
 158         struct mlx5_core_dev *mdev = priv->mdev;
 159         struct mlx5_qp_context context;
 160         int err;
 161
 162         err = mlx5_core_qp_modify(mdev, MLX5_CMD_OP_2RST_QP, 0, &context,
 163                                   &ipriv->qp);
 164         if (err)
 165                 mlx5_core_err(mdev, "Failed to modify qp 2RST, err: %d\n", err);
 166 }
 167
 168 #define MLX5_QP_ENHANCED_ULP_STATELESS_MODE 2
 169
 170 int mlx5i_create_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp)
 171 {
 172         u32 *in = NULL;
 173         void *addr_path;
 174         int ret = 0;
 175         int inlen;
 176         void *qpc;
 177
 178         inlen = MLX5_ST_SZ_BYTES(create_qp_in);
 179         in = kvzalloc(inlen, GFP_KERNEL);
 180         if (!in)
 181                 return -ENOMEM;
 182
 183         qpc = MLX5_ADDR_OF(create_qp_in, in, qpc);
 184         MLX5_SET(qpc, qpc, st, MLX5_QP_ST_UD);
 185         MLX5_SET(qpc, qpc, pm_state, MLX5_QP_PM_MIGRATED);
 186         MLX5_SET(qpc, qpc, ulp_stateless_offload_mode,
 187                  MLX5_QP_ENHANCED_ULP_STATELESS_MODE);
 188
 189         addr_path = MLX5_ADDR_OF(qpc, qpc, primary_address_path);
 190         MLX5_SET(ads, addr_path, port, 1);
 191         MLX5_SET(ads, addr_path, grh, 1);
 192
 193         ret = mlx5_core_create_qp(mdev, qp, in, inlen);
 194         if (ret) {
 195                 mlx5_core_err(mdev, "Failed creating IPoIB QP err : %d\n", ret);
 196                 goto out;
 197         }
 198
 199 out:
 200         kvfree(in);
 201         return ret;
 202 }
 203
 204 void mlx5i_destroy_underlay_qp(struct mlx5_core_dev *mdev, struct mlx5_core_qp *qp)
 205 {
 206         mlx5_core_destroy_qp(mdev, qp);
 207 }
 208
 209 static int mlx5i_init_tx(struct mlx5e_priv *priv)
 210 {
 211         struct mlx5i_priv *ipriv = priv->ppriv;
 212         int err;
 213
 214         err = mlx5i_create_underlay_qp(priv->mdev, &ipriv->qp);
 215         if (err) {
 216                 mlx5_core_warn(priv->mdev, "create underlay QP failed, %d\n", err);
 217                 return err;
 218         }
 219
 220         err = mlx5e_create_tis(priv->mdev, 0 /* tc */, ipriv->qp.qpn, &priv->tisn[0]);
 221         if (err) {
 222                 mlx5_core_warn(priv->mdev, "create tis failed, %d\n", err);
 223                 goto err_destroy_underlay_qp;
 224         }
 225
 226         return 0;
 227
 228 err_destroy_underlay_qp:
 229         mlx5i_destroy_underlay_qp(priv->mdev, &ipriv->qp);
 230         return err;
 231 }
 232
 233 static void mlx5i_cleanup_tx(struct mlx5e_priv *priv)
 234 {
 235         struct mlx5i_priv *ipriv = priv->ppriv;
 236
 237         mlx5e_destroy_tis(priv->mdev, priv->tisn[0]);
 238         mlx5i_destroy_underlay_qp(priv->mdev, &ipriv->qp);
 239 }
 240
 241 static int mlx5i_create_flow_steering(struct mlx5e_priv *priv)
 242 {
 243         int err;
 244
 245         priv->fs.ns = mlx5_get_flow_namespace(priv->mdev,
 246                                                MLX5_FLOW_NAMESPACE_KERNEL);
 247
 248         if (!priv->fs.ns)
 249                 return -EINVAL;
 250
 251         err = mlx5e_arfs_create_tables(priv);
 252         if (err) {
 253                 netdev_err(priv->netdev, "Failed to create arfs tables, err=%d\n",
 254                            err);
 255                 priv->netdev->hw_features &= ~NETIF_F_NTUPLE;
 256         }
 257
 258         err = mlx5e_create_inner_ttc_table(priv);
 259         if (err) {
 260                 netdev_err(priv->netdev, "Failed to create inner ttc table, err=%d\n",
 261                            err);
 262                 goto err_destroy_arfs_tables;
 263         }
 264
 265         err = mlx5e_create_ttc_table(priv);
 266         if (err) {
 267                 netdev_err(priv->netdev, "Failed to create ttc table, err=%d\n",
 268                            err);
 269                 goto err_destroy_inner_ttc_table;
 270         }
 271
 272         return 0;
 273
 274 err_destroy_inner_ttc_table:
 275         mlx5e_destroy_inner_ttc_table(priv);
 276 err_destroy_arfs_tables:
 277         mlx5e_arfs_destroy_tables(priv);
 278
 279         return err;
 280 }
 281
 282 static void mlx5i_destroy_flow_steering(struct mlx5e_priv *priv)
 283 {
 284         mlx5e_destroy_ttc_table(priv);
 285         mlx5e_destroy_inner_ttc_table(priv);
 286         mlx5e_arfs_destroy_tables(priv);
 287 }
 288
 289 static int mlx5i_init_rx(struct mlx5e_priv *priv)
 290 {
 291         int err;
 292
 293         err = mlx5e_create_indirect_rqt(priv);
 294         if (err)
 295                 return err;
 296
 297         err = mlx5e_create_direct_rqts(priv);
 298         if (err)
 299                 goto err_destroy_indirect_rqts;
 300
 301         err = mlx5e_create_indirect_tirs(priv);
 302         if (err)
 303                 goto err_destroy_direct_rqts;
 304
 305         err = mlx5e_create_direct_tirs(priv);
 306         if (err)
 307                 goto err_destroy_indirect_tirs;
 308
 309         err = mlx5i_create_flow_steering(priv);
 310         if (err)
 311                 goto err_destroy_direct_tirs;
 312
 313         return 0;
 314
 315 err_destroy_direct_tirs:
 316         mlx5e_destroy_direct_tirs(priv);
 317 err_destroy_indirect_tirs:
 318         mlx5e_destroy_indirect_tirs(priv);
 319 err_destroy_direct_rqts:
 320         mlx5e_destroy_direct_rqts(priv);
 321 err_destroy_indirect_rqts:
 322         mlx5e_destroy_rqt(priv, &priv->indir_rqt);
 323         return err;
 324 }
 325
 326 static void mlx5i_cleanup_rx(struct mlx5e_priv *priv)
 327 {
 328         mlx5i_destroy_flow_steering(priv);
 329         mlx5e_destroy_direct_tirs(priv);
 330         mlx5e_destroy_indirect_tirs(priv);
 331         mlx5e_destroy_direct_rqts(priv);
 332         mlx5e_destroy_rqt(priv, &priv->indir_rqt);
 333 }
 334
 335 static const struct mlx5e_profile mlx5i_nic_profile = {
 336         .init              = mlx5i_init,
 337         .cleanup           = mlx5i_cleanup,
 338         .init_tx           = mlx5i_init_tx,
 339         .cleanup_tx        = mlx5i_cleanup_tx,
 340         .init_rx           = mlx5i_init_rx,
 341         .cleanup_rx        = mlx5i_cleanup_rx,
 342         .enable            = NULL, /* mlx5i_enable */
 343         .disable           = NULL, /* mlx5i_disable */
 344         .update_stats      = NULL, /* mlx5i_update_stats */
 345         .max_nch           = mlx5e_get_max_num_channels,
 346         .update_carrier    = NULL, /* no HW update in IB link */
 347         .rx_handlers.handle_rx_cqe       = mlx5i_handle_rx_cqe,
 348         .rx_handlers.handle_rx_cqe_mpwqe = NULL, /* Not supported */
 349         .max_tc            = MLX5I_MAX_NUM_TC,
 350 };
 351
 352 /* mlx5i netdev NDos */
 353
 354 static int mlx5i_change_mtu(struct net_device *netdev, int new_mtu)
 355 {
 356         struct mlx5e_priv *priv = mlx5i_epriv(netdev);
 357         struct mlx5e_channels new_channels = {};
 358         int curr_mtu;
 359         int err = 0;
 360
 361         mutex_lock(&priv->state_lock);
 362
 363         curr_mtu    = netdev->mtu;
 364         netdev->mtu = new_mtu;
 365
 366         if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
 367                 goto out;
 368
 369         new_channels.params = priv->channels.params;
 370         err = mlx5e_open_channels(priv, &new_channels);
 371         if (err) {
 372                 netdev->mtu = curr_mtu;
 373                 goto out;
 374         }
 375
 376         mlx5e_switch_priv_channels(priv, &new_channels, NULL);
 377
 378 out:
 379         mutex_unlock(&priv->state_lock);
 380         return err;
 381 }
 382
 383 int mlx5i_dev_init(struct net_device *dev)
 384 {
 385         struct mlx5e_priv    *priv   = mlx5i_epriv(dev);
 386         struct mlx5i_priv    *ipriv  = priv->ppriv;
 387
 388         /* Set dev address using underlay QP */
 389         dev->dev_addr[1] = (ipriv->qp.qpn >> 16) & 0xff;
 390         dev->dev_addr[2] = (ipriv->qp.qpn >>  8) & 0xff;
 391         dev->dev_addr[3] = (ipriv->qp.qpn) & 0xff;
 392
 393         /* Add QPN to net-device mapping to HT */
 394         mlx5i_pkey_add_qpn(dev ,ipriv->qp.qpn);
 395
 396         return 0;
 397 }
 398
 399 static int mlx5i_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 400 {
 401         struct mlx5e_priv *priv = mlx5i_epriv(dev);
 402
 403         switch (cmd) {
 404         case SIOCSHWTSTAMP:
 405                 return mlx5e_hwstamp_set(priv, ifr);
 406         case SIOCGHWTSTAMP:
 407                 return mlx5e_hwstamp_get(priv, ifr);
 408         default:
 409                 return -EOPNOTSUPP;
 410         }
 411 }
 412
 413 void mlx5i_dev_cleanup(struct net_device *dev)
 414 {
 415         struct mlx5e_priv    *priv   = mlx5i_epriv(dev);
 416         struct mlx5i_priv    *ipriv = priv->ppriv;
 417
 418         mlx5i_uninit_underlay_qp(priv);
 419
 420         /* Delete QPN to net-device mapping from HT */
 421         mlx5i_pkey_del_qpn(dev, ipriv->qp.qpn);
 422 }
 423
 424 static int mlx5i_open(struct net_device *netdev)
 425 {
 426         struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
 427         struct mlx5i_priv *ipriv = epriv->ppriv;
 428         struct mlx5_core_dev *mdev = epriv->mdev;
 429         int err;
 430
 431         mutex_lock(&epriv->state_lock);
 432
 433         set_bit(MLX5E_STATE_OPENED, &epriv->state);
 434
 435         err = mlx5i_init_underlay_qp(epriv);
 436         if (err) {
 437                 mlx5_core_warn(mdev, "prepare underlay qp state failed, %d\n", err);
 438                 goto err_clear_state_opened_flag;
 439         }
 440
 441         err = mlx5_fs_add_rx_underlay_qpn(mdev, ipriv->qp.qpn);
 442         if (err) {
 443                 mlx5_core_warn(mdev, "attach underlay qp to ft failed, %d\n", err);
 444                 goto err_reset_qp;
 445         }
 446
 447         err = mlx5e_open_channels(epriv, &epriv->channels);
 448         if (err)
 449                 goto err_remove_fs_underlay_qp;
 450
 451         mlx5e_refresh_tirs(epriv, false);
 452         mlx5e_activate_priv_channels(epriv);
 453         mlx5e_timestamp_set(epriv);
 454
 455         mutex_unlock(&epriv->state_lock);
 456         return 0;
 457
 458 err_remove_fs_underlay_qp:
 459         mlx5_fs_remove_rx_underlay_qpn(mdev, ipriv->qp.qpn);
 460 err_reset_qp:
 461         mlx5i_uninit_underlay_qp(epriv);
 462 err_clear_state_opened_flag:
 463         clear_bit(MLX5E_STATE_OPENED, &epriv->state);
 464         mutex_unlock(&epriv->state_lock);
 465         return err;
 466 }
 467
 468 static int mlx5i_close(struct net_device *netdev)
 469 {
 470         struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
 471         struct mlx5i_priv *ipriv = epriv->ppriv;
 472         struct mlx5_core_dev *mdev = epriv->mdev;
 473
 474         /* May already be CLOSED in case a previous configuration operation
 475          * (e.g RX/TX queue size change) that involves close&open failed.
 476          */
 477         mutex_lock(&epriv->state_lock);
 478
 479         if (!test_bit(MLX5E_STATE_OPENED, &epriv->state))
 480                 goto unlock;
 481
 482         clear_bit(MLX5E_STATE_OPENED, &epriv->state);
 483
 484         netif_carrier_off(epriv->netdev);
 485         mlx5_fs_remove_rx_underlay_qpn(mdev, ipriv->qp.qpn);
 486         mlx5i_uninit_underlay_qp(epriv);
 487         mlx5e_deactivate_priv_channels(epriv);
 488         mlx5e_close_channels(&epriv->channels);;
 489 unlock:
 490         mutex_unlock(&epriv->state_lock);
 491         return 0;
 492 }
 493
 494 /* IPoIB RDMA netdev callbacks */
 495 static int mlx5i_attach_mcast(struct net_device *netdev, struct ib_device *hca,
 496                               union ib_gid *gid, u16 lid, int set_qkey,
 497                               u32 qkey)
 498 {
 499         struct mlx5e_priv    *epriv = mlx5i_epriv(netdev);
 500         struct mlx5_core_dev *mdev  = epriv->mdev;
 501         struct mlx5i_priv    *ipriv = epriv->ppriv;
 502         int err;
 503
 504         mlx5_core_dbg(mdev, "attaching QPN 0x%x, MGID %pI6\n", ipriv->qp.qpn, gid->raw);
 505         err = mlx5_core_attach_mcg(mdev, gid, ipriv->qp.qpn);
 506         if (err)
 507                 mlx5_core_warn(mdev, "failed attaching QPN 0x%x, MGID %pI6\n",
 508                                ipriv->qp.qpn, gid->raw);
 509
 510         if (set_qkey) {
 511                 mlx5_core_dbg(mdev, "%s setting qkey 0x%x\n",
 512                               netdev->name, qkey);
 513                 ipriv->qkey = qkey;
 514         }
 515
 516         return err;
 517 }
 518
 519 static int mlx5i_detach_mcast(struct net_device *netdev, struct ib_device *hca,
 520                               union ib_gid *gid, u16 lid)
 521 {
 522         struct mlx5e_priv    *epriv = mlx5i_epriv(netdev);
 523         struct mlx5_core_dev *mdev  = epriv->mdev;
 524         struct mlx5i_priv    *ipriv = epriv->ppriv;
 525         int err;
 526
 527         mlx5_core_dbg(mdev, "detaching QPN 0x%x, MGID %pI6\n", ipriv->qp.qpn, gid->raw);
 528
 529         err = mlx5_core_detach_mcg(mdev, gid, ipriv->qp.qpn);
 530         if (err)
 531                 mlx5_core_dbg(mdev, "failed dettaching QPN 0x%x, MGID %pI6\n",
 532                               ipriv->qp.qpn, gid->raw);
 533
 534         return err;
 535 }
 536
 537 static int mlx5i_xmit(struct net_device *dev, struct sk_buff *skb,
 538                       struct ib_ah *address, u32 dqpn)
 539 {
 540         struct mlx5e_priv *epriv = mlx5i_epriv(dev);
 541         struct mlx5e_txqsq *sq   = epriv->txq2sq[skb_get_queue_mapping(skb)];
 542         struct mlx5_ib_ah *mah   = to_mah(address);
 543         struct mlx5i_priv *ipriv = epriv->ppriv;
 544
 545         return mlx5i_sq_xmit(sq, skb, &mah->av, dqpn, ipriv->qkey);
 546 }
 547
 548 static void mlx5i_set_pkey_index(struct net_device *netdev, int id)
 549 {
 550         struct mlx5i_priv *ipriv = netdev_priv(netdev);
 551
 552         ipriv->pkey_index = (u16)id;
 553 }
 554
 555 static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
 556 {
 557         if (MLX5_CAP_GEN(mdev, port_type) != MLX5_CAP_PORT_TYPE_IB)
 558                 return -EOPNOTSUPP;
 559
 560         if (!MLX5_CAP_GEN(mdev, ipoib_enhanced_offloads)) {
 561                 mlx5_core_warn(mdev, "IPoIB enhanced offloads are not supported\n");
 562                 return -EOPNOTSUPP;
 563         }
 564
 565         return 0;
 566 }
 567
 568 struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
 569                                           struct ib_device *ibdev,
 570                                           const char *name,
 571                                           void (*setup)(struct net_device *))
 572 {
 573         const struct mlx5e_profile *profile;
 574         struct net_device *netdev;
 575         struct mlx5i_priv *ipriv;
 576         struct mlx5e_priv *epriv;
 577         struct rdma_netdev *rn;
 578         bool sub_interface;
 579         int nch;
 580         int err;
 581
 582         if (mlx5i_check_required_hca_cap(mdev)) {
 583                 mlx5_core_warn(mdev, "Accelerated mode is not supported\n");
 584                 return ERR_PTR(-EOPNOTSUPP);
 585         }
 586
 587         /* TODO: Need to find a better way to check if child device*/
 588         sub_interface = (mdev->mlx5e_res.pdn != 0);
 589
 590         if (sub_interface)
 591                 profile = mlx5i_pkey_get_profile();
 592         else
 593                 profile = &mlx5i_nic_profile;
 594
 595         nch = profile->max_nch(mdev);
 596
 597         netdev = alloc_netdev_mqs(sizeof(struct mlx5i_priv) + sizeof(struct mlx5e_priv),
 598                                   name, NET_NAME_UNKNOWN,
 599                                   setup,
 600                                   nch * MLX5E_MAX_NUM_TC,
 601                                   nch);
 602         if (!netdev) {
 603                 mlx5_core_warn(mdev, "alloc_netdev_mqs failed\n");
 604                 return NULL;
 605         }
 606
 607         ipriv = netdev_priv(netdev);
 608         epriv = mlx5i_epriv(netdev);
 609
 610         epriv->wq = create_singlethread_workqueue("mlx5i");
 611         if (!epriv->wq)
 612                 goto err_free_netdev;
 613
 614         ipriv->sub_interface = sub_interface;
 615         if (!ipriv->sub_interface) {
 616                 err = mlx5i_pkey_qpn_ht_init(netdev);
 617                 if (err) {
 618                         mlx5_core_warn(mdev, "allocate qpn_to_netdev ht failed\n");
 619                         goto destroy_wq;
 620                 }
 621
 622                 /* This should only be called once per mdev */
 623                 err = mlx5e_create_mdev_resources(mdev);
 624                 if (err)
 625                         goto destroy_ht;
 626         }
 627
 628         profile->init(mdev, netdev, profile, ipriv);
 629
 630         mlx5e_attach_netdev(epriv);
 631         netif_carrier_off(netdev);
 632
 633         /* set rdma_netdev func pointers */
 634         rn = &ipriv->rn;
 635         rn->hca  = ibdev;
 636         rn->send = mlx5i_xmit;
 637         rn->attach_mcast = mlx5i_attach_mcast;
 638         rn->detach_mcast = mlx5i_detach_mcast;
 639         rn->set_id = mlx5i_set_pkey_index;
 640
 641         return netdev;
 642
 643 destroy_ht:
 644         mlx5i_pkey_qpn_ht_cleanup(netdev);
 645 destroy_wq:
 646         destroy_workqueue(epriv->wq);
 647 err_free_netdev:
 648         free_netdev(netdev);
 649
 650         return NULL;
 651 }
 652 EXPORT_SYMBOL(mlx5_rdma_netdev_alloc);
 653
 654 void mlx5_rdma_netdev_free(struct net_device *netdev)
 655 {
 656         struct mlx5e_priv *priv = mlx5i_epriv(netdev);
 657         struct mlx5i_priv *ipriv = priv->ppriv;
 658         const struct mlx5e_profile *profile = priv->profile;
 659
 660         mlx5e_detach_netdev(priv);
 661         profile->cleanup(priv);
 662         destroy_workqueue(priv->wq);
 663
 664         if (!ipriv->sub_interface) {
 665                 mlx5i_pkey_qpn_ht_cleanup(netdev);
 666                 mlx5e_destroy_mdev_resources(priv->mdev);
 667         }
 668         free_netdev(netdev);
 669 }
 670 EXPORT_SYMBOL(mlx5_rdma_netdev_free);