drivers/net/mlx5/mlx5_trigger.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2015 Mellanox Technologies, Ltd
   4  */
   5
   6 #include <unistd.h>
   7
   8 #include <rte_ether.h>
   9 #include <rte_ethdev_driver.h>
  10 #include <rte_interrupts.h>
  11 #include <rte_alarm.h>
  12
  13 #include "mlx5.h"
  14 #include "mlx5_mr.h"
  15 #include "mlx5_rxtx.h"
  16 #include "mlx5_utils.h"
  17 #include "rte_pmd_mlx5.h"
  18
  19 /**
  20  * Stop traffic on Tx queues.
  21  *
  22  * @param dev
  23  *   Pointer to Ethernet device structure.
  24  */
  25 static void
  26 mlx5_txq_stop(struct rte_eth_dev *dev)
  27 {
  28         struct mlx5_priv *priv = dev->data->dev_private;
  29         unsigned int i;
  30
  31         for (i = 0; i != priv->txqs_n; ++i)
  32                 mlx5_txq_release(dev, i);
  33 }
  34
  35 /**
  36  * Start traffic on Tx queues.
  37  *
  38  * @param dev
  39  *   Pointer to Ethernet device structure.
  40  *
  41  * @return
  42  *   0 on success, a negative errno value otherwise and rte_errno is set.
  43  */
  44 static int
  45 mlx5_txq_start(struct rte_eth_dev *dev)
  46 {
  47         struct mlx5_priv *priv = dev->data->dev_private;
  48         unsigned int i;
  49         int ret;
  50
  51         for (i = 0; i != priv->txqs_n; ++i) {
  52                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i);
  53
  54                 if (!txq_ctrl)
  55                         continue;
  56                 if (txq_ctrl->type == MLX5_TXQ_TYPE_HAIRPIN) {
  57                         txq_ctrl->obj = mlx5_txq_obj_new
  58                                 (dev, i, MLX5_TXQ_OBJ_TYPE_DEVX_HAIRPIN);
  59                 } else {
  60                         txq_alloc_elts(txq_ctrl);
  61                         txq_ctrl->obj = mlx5_txq_obj_new
  62                                 (dev, i, priv->txpp_en ?
  63                                 MLX5_TXQ_OBJ_TYPE_DEVX_SQ :
  64                                 MLX5_TXQ_OBJ_TYPE_IBV);
  65                 }
  66                 if (!txq_ctrl->obj) {
  67                         rte_errno = ENOMEM;
  68                         goto error;
  69                 }
  70         }
  71         return 0;
  72 error:
  73         ret = rte_errno; /* Save rte_errno before cleanup. */
  74         do {
  75                 mlx5_txq_release(dev, i);
  76         } while (i-- != 0);
  77         rte_errno = ret; /* Restore rte_errno. */
  78         return -rte_errno;
  79 }
  80
  81 /**
  82  * Stop traffic on Rx queues.
  83  *
  84  * @param dev
  85  *   Pointer to Ethernet device structure.
  86  */
  87 static void
  88 mlx5_rxq_stop(struct rte_eth_dev *dev)
  89 {
  90         struct mlx5_priv *priv = dev->data->dev_private;
  91         unsigned int i;
  92
  93         for (i = 0; i != priv->rxqs_n; ++i)
  94                 mlx5_rxq_release(dev, i);
  95 }
  96
  97 /**
  98  * Start traffic on Rx queues.
  99  *
 100  * @param dev
 101  *   Pointer to Ethernet device structure.
 102  *
 103  * @return
 104  *   0 on success, a negative errno value otherwise and rte_errno is set.
 105  */
 106 static int
 107 mlx5_rxq_start(struct rte_eth_dev *dev)
 108 {
 109         struct mlx5_priv *priv = dev->data->dev_private;
 110         unsigned int i;
 111         int ret = 0;
 112         enum mlx5_rxq_obj_type obj_type = MLX5_RXQ_OBJ_TYPE_IBV;
 113         struct mlx5_rxq_data *rxq = NULL;
 114
 115         for (i = 0; i < priv->rxqs_n; ++i) {
 116                 rxq = (*priv->rxqs)[i];
 117                 if (rxq && rxq->lro) {
 118                         obj_type =  MLX5_RXQ_OBJ_TYPE_DEVX_RQ;
 119                         break;
 120                 }
 121         }
 122         /* Allocate/reuse/resize mempool for Multi-Packet RQ. */
 123         if (mlx5_mprq_alloc_mp(dev)) {
 124                 /* Should not release Rx queues but return immediately. */
 125                 return -rte_errno;
 126         }
 127         for (i = 0; i != priv->rxqs_n; ++i) {
 128                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 129                 struct rte_mempool *mp;
 130
 131                 if (!rxq_ctrl)
 132                         continue;
 133                 if (rxq_ctrl->type == MLX5_RXQ_TYPE_HAIRPIN) {
 134                         rxq_ctrl->obj = mlx5_rxq_obj_new
 135                                 (dev, i, MLX5_RXQ_OBJ_TYPE_DEVX_HAIRPIN);
 136                         if (!rxq_ctrl->obj)
 137                                 goto error;
 138                         continue;
 139                 }
 140                 /* Pre-register Rx mempool. */
 141                 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
 142                      rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp;
 143                 DRV_LOG(DEBUG,
 144                         "port %u Rx queue %u registering"
 145                         " mp %s having %u chunks",
 146                         dev->data->port_id, rxq_ctrl->rxq.idx,
 147                         mp->name, mp->nb_mem_chunks);
 148                 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp);
 149                 ret = rxq_alloc_elts(rxq_ctrl);
 150                 if (ret)
 151                         goto error;
 152                 rxq_ctrl->obj = mlx5_rxq_obj_new(dev, i, obj_type);
 153                 if (!rxq_ctrl->obj)
 154                         goto error;
 155                 if (obj_type == MLX5_RXQ_OBJ_TYPE_IBV)
 156                         rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num;
 157                 else if (obj_type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ)
 158                         rxq_ctrl->wqn = rxq_ctrl->obj->rq->id;
 159         }
 160         return 0;
 161 error:
 162         ret = rte_errno; /* Save rte_errno before cleanup. */
 163         do {
 164                 mlx5_rxq_release(dev, i);
 165         } while (i-- != 0);
 166         rte_errno = ret; /* Restore rte_errno. */
 167         return -rte_errno;
 168 }
 169
 170 /**
 171  * Binds Tx queues to Rx queues for hairpin.
 172  *
 173  * Binds Tx queues to the target Rx queues.
 174  *
 175  * @param dev
 176  *   Pointer to Ethernet device structure.
 177  *
 178  * @return
 179  *   0 on success, a negative errno value otherwise and rte_errno is set.
 180  */
 181 static int
 182 mlx5_hairpin_bind(struct rte_eth_dev *dev)
 183 {
 184         struct mlx5_priv *priv = dev->data->dev_private;
 185         struct mlx5_devx_modify_sq_attr sq_attr = { 0 };
 186         struct mlx5_devx_modify_rq_attr rq_attr = { 0 };
 187         struct mlx5_txq_ctrl *txq_ctrl;
 188         struct mlx5_rxq_ctrl *rxq_ctrl;
 189         struct mlx5_devx_obj *sq;
 190         struct mlx5_devx_obj *rq;
 191         unsigned int i;
 192         int ret = 0;
 193
 194         for (i = 0; i != priv->txqs_n; ++i) {
 195                 txq_ctrl = mlx5_txq_get(dev, i);
 196                 if (!txq_ctrl)
 197                         continue;
 198                 if (txq_ctrl->type != MLX5_TXQ_TYPE_HAIRPIN) {
 199                         mlx5_txq_release(dev, i);
 200                         continue;
 201                 }
 202                 if (!txq_ctrl->obj) {
 203                         rte_errno = ENOMEM;
 204                         DRV_LOG(ERR, "port %u no txq object found: %d",
 205                                 dev->data->port_id, i);
 206                         mlx5_txq_release(dev, i);
 207                         return -rte_errno;
 208                 }
 209                 sq = txq_ctrl->obj->sq;
 210                 rxq_ctrl = mlx5_rxq_get(dev,
 211                                         txq_ctrl->hairpin_conf.peers[0].queue);
 212                 if (!rxq_ctrl) {
 213                         mlx5_txq_release(dev, i);
 214                         rte_errno = EINVAL;
 215                         DRV_LOG(ERR, "port %u no rxq object found: %d",
 216                                 dev->data->port_id,
 217                                 txq_ctrl->hairpin_conf.peers[0].queue);
 218                         return -rte_errno;
 219                 }
 220                 if (rxq_ctrl->type != MLX5_RXQ_TYPE_HAIRPIN ||
 221                     rxq_ctrl->hairpin_conf.peers[0].queue != i) {
 222                         rte_errno = ENOMEM;
 223                         DRV_LOG(ERR, "port %u Tx queue %d can't be binded to "
 224                                 "Rx queue %d", dev->data->port_id,
 225                                 i, txq_ctrl->hairpin_conf.peers[0].queue);
 226                         goto error;
 227                 }
 228                 rq = rxq_ctrl->obj->rq;
 229                 if (!rq) {
 230                         rte_errno = ENOMEM;
 231                         DRV_LOG(ERR, "port %u hairpin no matching rxq: %d",
 232                                 dev->data->port_id,
 233                                 txq_ctrl->hairpin_conf.peers[0].queue);
 234                         goto error;
 235                 }
 236                 sq_attr.state = MLX5_SQC_STATE_RDY;
 237                 sq_attr.sq_state = MLX5_SQC_STATE_RST;
 238                 sq_attr.hairpin_peer_rq = rq->id;
 239                 sq_attr.hairpin_peer_vhca = priv->config.hca_attr.vhca_id;
 240                 ret = mlx5_devx_cmd_modify_sq(sq, &sq_attr);
 241                 if (ret)
 242                         goto error;
 243                 rq_attr.state = MLX5_SQC_STATE_RDY;
 244                 rq_attr.rq_state = MLX5_SQC_STATE_RST;
 245                 rq_attr.hairpin_peer_sq = sq->id;
 246                 rq_attr.hairpin_peer_vhca = priv->config.hca_attr.vhca_id;
 247                 ret = mlx5_devx_cmd_modify_rq(rq, &rq_attr);
 248                 if (ret)
 249                         goto error;
 250                 mlx5_txq_release(dev, i);
 251                 mlx5_rxq_release(dev, txq_ctrl->hairpin_conf.peers[0].queue);
 252         }
 253         return 0;
 254 error:
 255         mlx5_txq_release(dev, i);
 256         mlx5_rxq_release(dev, txq_ctrl->hairpin_conf.peers[0].queue);
 257         return -rte_errno;
 258 }
 259
 260 /**
 261  * DPDK callback to start the device.
 262  *
 263  * Simulate device start by attaching all configured flows.
 264  *
 265  * @param dev
 266  *   Pointer to Ethernet device structure.
 267  *
 268  * @return
 269  *   0 on success, a negative errno value otherwise and rte_errno is set.
 270  */
 271 int
 272 mlx5_dev_start(struct rte_eth_dev *dev)
 273 {
 274         struct mlx5_priv *priv = dev->data->dev_private;
 275         int ret;
 276         int fine_inline;
 277
 278         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 279         fine_inline = rte_mbuf_dynflag_lookup
 280                 (RTE_PMD_MLX5_FINE_GRANULARITY_INLINE, NULL);
 281         if (fine_inline > 0)
 282                 rte_net_mlx5_dynf_inline_mask = 1UL << fine_inline;
 283         else
 284                 rte_net_mlx5_dynf_inline_mask = 0;
 285         if (dev->data->nb_rx_queues > 0) {
 286                 ret = mlx5_dev_configure_rss_reta(dev);
 287                 if (ret) {
 288                         DRV_LOG(ERR, "port %u reta config failed: %s",
 289                                 dev->data->port_id, strerror(rte_errno));
 290                         return -rte_errno;
 291                 }
 292         }
 293         ret = mlx5_txpp_start(dev);
 294         if (ret) {
 295                 DRV_LOG(ERR, "port %u Tx packet pacing init failed: %s",
 296                         dev->data->port_id, strerror(rte_errno));
 297                 goto error;
 298         }
 299         ret = mlx5_txq_start(dev);
 300         if (ret) {
 301                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 302                         dev->data->port_id, strerror(rte_errno));
 303                 goto error;
 304         }
 305         ret = mlx5_rxq_start(dev);
 306         if (ret) {
 307                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 308                         dev->data->port_id, strerror(rte_errno));
 309                 goto error;
 310         }
 311         ret = mlx5_hairpin_bind(dev);
 312         if (ret) {
 313                 DRV_LOG(ERR, "port %u hairpin binding failed: %s",
 314                         dev->data->port_id, strerror(rte_errno));
 315                 goto error;
 316         }
 317         /* Set started flag here for the following steps like control flow. */
 318         dev->data->dev_started = 1;
 319         ret = mlx5_rx_intr_vec_enable(dev);
 320         if (ret) {
 321                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 322                         dev->data->port_id);
 323                 goto error;
 324         }
 325         mlx5_os_stats_init(dev);
 326         ret = mlx5_traffic_enable(dev);
 327         if (ret) {
 328                 DRV_LOG(ERR, "port %u failed to set defaults flows",
 329                         dev->data->port_id);
 330                 goto error;
 331         }
 332         /* Set a mask and offset of dynamic metadata flows into Rx queues. */
 333         mlx5_flow_rxq_dynf_metadata_set(dev);
 334         /* Set flags and context to convert Rx timestamps. */
 335         mlx5_rxq_timestamp_set(dev);
 336         /* Set a mask and offset of scheduling on timestamp into Tx queues. */
 337         mlx5_txq_dynf_timestamp_set(dev);
 338         /*
 339          * In non-cached mode, it only needs to start the default mreg copy
 340          * action and no flow created by application exists anymore.
 341          * But it is worth wrapping the interface for further usage.
 342          */
 343         ret = mlx5_flow_start_default(dev);
 344         if (ret) {
 345                 DRV_LOG(DEBUG, "port %u failed to start default actions: %s",
 346                         dev->data->port_id, strerror(rte_errno));
 347                 goto error;
 348         }
 349         rte_wmb();
 350         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 351         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 352         /* Enable datapath on secondary process. */
 353         mlx5_mp_os_req_start_rxtx(dev);
 354         if (priv->sh->intr_handle.fd >= 0) {
 355                 priv->sh->port[priv->dev_port - 1].ih_port_id =
 356                                         (uint32_t)dev->data->port_id;
 357         } else {
 358                 DRV_LOG(INFO, "port %u starts without LSC and RMV interrupts.",
 359                         dev->data->port_id);
 360                 dev->data->dev_conf.intr_conf.lsc = 0;
 361                 dev->data->dev_conf.intr_conf.rmv = 0;
 362         }
 363         if (priv->sh->intr_handle_devx.fd >= 0)
 364                 priv->sh->port[priv->dev_port - 1].devx_ih_port_id =
 365                                         (uint32_t)dev->data->port_id;
 366         return 0;
 367 error:
 368         ret = rte_errno; /* Save rte_errno before cleanup. */
 369         /* Rollback. */
 370         dev->data->dev_started = 0;
 371         mlx5_flow_stop_default(dev);
 372         mlx5_traffic_disable(dev);
 373         mlx5_txq_stop(dev);
 374         mlx5_rxq_stop(dev);
 375         mlx5_txpp_stop(dev); /* Stop last. */
 376         rte_errno = ret; /* Restore rte_errno. */
 377         return -rte_errno;
 378 }
 379
 380 /**
 381  * DPDK callback to stop the device.
 382  *
 383  * Simulate device stop by detaching all configured flows.
 384  *
 385  * @param dev
 386  *   Pointer to Ethernet device structure.
 387  */
 388 void
 389 mlx5_dev_stop(struct rte_eth_dev *dev)
 390 {
 391         struct mlx5_priv *priv = dev->data->dev_private;
 392
 393         dev->data->dev_started = 0;
 394         /* Prevent crashes when queues are still in use. */
 395         dev->rx_pkt_burst = removed_rx_burst;
 396         dev->tx_pkt_burst = removed_tx_burst;
 397         rte_wmb();
 398         /* Disable datapath on secondary process. */
 399         mlx5_mp_os_req_stop_rxtx(dev);
 400         usleep(1000 * priv->rxqs_n);
 401         DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id);
 402         mlx5_flow_stop_default(dev);
 403         /* Control flows for default traffic can be removed firstly. */
 404         mlx5_traffic_disable(dev);
 405         /* All RX queue flags will be cleared in the flush interface. */
 406         mlx5_flow_list_flush(dev, &priv->flows, true);
 407         mlx5_rx_intr_vec_disable(dev);
 408         priv->sh->port[priv->dev_port - 1].ih_port_id = RTE_MAX_ETHPORTS;
 409         priv->sh->port[priv->dev_port - 1].devx_ih_port_id = RTE_MAX_ETHPORTS;
 410         mlx5_txq_stop(dev);
 411         mlx5_rxq_stop(dev);
 412         mlx5_txpp_stop(dev);
 413 }
 414
 415 /**
 416  * Enable traffic flows configured by control plane
 417  *
 418  * @param dev
 419  *   Pointer to Ethernet device private data.
 420  * @param dev
 421  *   Pointer to Ethernet device structure.
 422  *
 423  * @return
 424  *   0 on success, a negative errno value otherwise and rte_errno is set.
 425  */
 426 int
 427 mlx5_traffic_enable(struct rte_eth_dev *dev)
 428 {
 429         struct mlx5_priv *priv = dev->data->dev_private;
 430         struct rte_flow_item_eth bcast = {
 431                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 432         };
 433         struct rte_flow_item_eth ipv6_multi_spec = {
 434                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 435         };
 436         struct rte_flow_item_eth ipv6_multi_mask = {
 437                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 438         };
 439         struct rte_flow_item_eth unicast = {
 440                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 441         };
 442         struct rte_flow_item_eth unicast_mask = {
 443                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 444         };
 445         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 446         const struct rte_ether_addr cmp = {
 447                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 448         };
 449         unsigned int i;
 450         unsigned int j;
 451         int ret;
 452
 453         /*
 454          * Hairpin txq default flow should be created no matter if it is
 455          * isolation mode. Or else all the packets to be sent will be sent
 456          * out directly without the TX flow actions, e.g. encapsulation.
 457          */
 458         for (i = 0; i != priv->txqs_n; ++i) {
 459                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i);
 460                 if (!txq_ctrl)
 461                         continue;
 462                 if (txq_ctrl->type == MLX5_TXQ_TYPE_HAIRPIN) {
 463                         ret = mlx5_ctrl_flow_source_queue(dev, i);
 464                         if (ret) {
 465                                 mlx5_txq_release(dev, i);
 466                                 goto error;
 467                         }
 468                 }
 469                 mlx5_txq_release(dev, i);
 470         }
 471         if (priv->config.dv_esw_en && !priv->config.vf) {
 472                 if (mlx5_flow_create_esw_table_zero_flow(dev))
 473                         priv->fdb_def_rule = 1;
 474                 else
 475                         DRV_LOG(INFO, "port %u FDB default rule cannot be"
 476                                 " configured - only Eswitch group 0 flows are"
 477                                 " supported.", dev->data->port_id);
 478         }
 479         if (!priv->config.lacp_by_user && priv->pf_bond >= 0) {
 480                 ret = mlx5_flow_lacp_miss(dev);
 481                 if (ret)
 482                         DRV_LOG(INFO, "port %u LACP rule cannot be created - "
 483                                 "forward LACP to kernel.", dev->data->port_id);
 484                 else
 485                         DRV_LOG(INFO, "LACP traffic will be missed in port %u."
 486                                 , dev->data->port_id);
 487         }
 488         if (priv->isolated)
 489                 return 0;
 490         if (dev->data->promiscuous) {
 491                 struct rte_flow_item_eth promisc = {
 492                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 493                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 494                         .type = 0,
 495                 };
 496
 497                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 498                 if (ret)
 499                         goto error;
 500         }
 501         if (dev->data->all_multicast) {
 502                 struct rte_flow_item_eth multicast = {
 503                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 504                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 505                         .type = 0,
 506                 };
 507
 508                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 509                 if (ret)
 510                         goto error;
 511         } else {
 512                 /* Add broadcast/multicast flows. */
 513                 for (i = 0; i != vlan_filter_n; ++i) {
 514                         uint16_t vlan = priv->vlan_filter[i];
 515
 516                         struct rte_flow_item_vlan vlan_spec = {
 517                                 .tci = rte_cpu_to_be_16(vlan),
 518                         };
 519                         struct rte_flow_item_vlan vlan_mask =
 520                                 rte_flow_item_vlan_mask;
 521
 522                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 523                                                   &vlan_spec, &vlan_mask);
 524                         if (ret)
 525                                 goto error;
 526                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 527                                                   &ipv6_multi_mask,
 528                                                   &vlan_spec, &vlan_mask);
 529                         if (ret)
 530                                 goto error;
 531                 }
 532                 if (!vlan_filter_n) {
 533                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 534                         if (ret)
 535                                 goto error;
 536                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 537                                              &ipv6_multi_mask);
 538                         if (ret)
 539                                 goto error;
 540                 }
 541         }
 542         /* Add MAC address flows. */
 543         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 544                 struct rte_ether_addr *mac = &dev->data->mac_addrs[i];
 545
 546                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 547                         continue;
 548                 memcpy(&unicast.dst.addr_bytes,
 549                        mac->addr_bytes,
 550                        RTE_ETHER_ADDR_LEN);
 551                 for (j = 0; j != vlan_filter_n; ++j) {
 552                         uint16_t vlan = priv->vlan_filter[j];
 553
 554                         struct rte_flow_item_vlan vlan_spec = {
 555                                 .tci = rte_cpu_to_be_16(vlan),
 556                         };
 557                         struct rte_flow_item_vlan vlan_mask =
 558                                 rte_flow_item_vlan_mask;
 559
 560                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 561                                                   &unicast_mask,
 562                                                   &vlan_spec,
 563                                                   &vlan_mask);
 564                         if (ret)
 565                                 goto error;
 566                 }
 567                 if (!vlan_filter_n) {
 568                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 569                         if (ret)
 570                                 goto error;
 571                 }
 572         }
 573         return 0;
 574 error:
 575         ret = rte_errno; /* Save rte_errno before cleanup. */
 576         mlx5_flow_list_flush(dev, &priv->ctrl_flows, false);
 577         rte_errno = ret; /* Restore rte_errno. */
 578         return -rte_errno;
 579 }
 580
 581
 582 /**
 583  * Disable traffic flows configured by control plane
 584  *
 585  * @param dev
 586  *   Pointer to Ethernet device private data.
 587  */
 588 void
 589 mlx5_traffic_disable(struct rte_eth_dev *dev)
 590 {
 591         struct mlx5_priv *priv = dev->data->dev_private;
 592
 593         mlx5_flow_list_flush(dev, &priv->ctrl_flows, false);
 594 }
 595
 596 /**
 597  * Restart traffic flows configured by control plane
 598  *
 599  * @param dev
 600  *   Pointer to Ethernet device private data.
 601  *
 602  * @return
 603  *   0 on success, a negative errno value otherwise and rte_errno is set.
 604  */
 605 int
 606 mlx5_traffic_restart(struct rte_eth_dev *dev)
 607 {
 608         if (dev->data->dev_started) {
 609                 mlx5_traffic_disable(dev);
 610                 return mlx5_traffic_enable(dev);
 611         }
 612         return 0;
 613 }