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_rxtx.h"
  15 #include "mlx5_utils.h"
  16 #include "rte_pmd_mlx5.h"
  17
  18 /**
  19  * Stop traffic on Tx queues.
  20  *
  21  * @param dev
  22  *   Pointer to Ethernet device structure.
  23  */
  24 static void
  25 mlx5_txq_stop(struct rte_eth_dev *dev)
  26 {
  27         struct mlx5_priv *priv = dev->data->dev_private;
  28         unsigned int i;
  29
  30         for (i = 0; i != priv->txqs_n; ++i)
  31                 mlx5_txq_release(dev, i);
  32 }
  33
  34 /**
  35  * Start traffic on Tx queues.
  36  *
  37  * @param dev
  38  *   Pointer to Ethernet device structure.
  39  *
  40  * @return
  41  *   0 on success, a negative errno value otherwise and rte_errno is set.
  42  */
  43 static int
  44 mlx5_txq_start(struct rte_eth_dev *dev)
  45 {
  46         struct mlx5_priv *priv = dev->data->dev_private;
  47         unsigned int i;
  48         int ret;
  49
  50         for (i = 0; i != priv->txqs_n; ++i) {
  51                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i);
  52
  53                 if (!txq_ctrl)
  54                         continue;
  55                 if (txq_ctrl->type == MLX5_TXQ_TYPE_HAIRPIN) {
  56                         txq_ctrl->obj = mlx5_txq_obj_new
  57                                 (dev, i, MLX5_TXQ_OBJ_TYPE_DEVX_HAIRPIN);
  58                 } else {
  59                         txq_alloc_elts(txq_ctrl);
  60                         txq_ctrl->obj = mlx5_txq_obj_new
  61                                 (dev, i, MLX5_TXQ_OBJ_TYPE_IBV);
  62                 }
  63                 if (!txq_ctrl->obj) {
  64                         rte_errno = ENOMEM;
  65                         goto error;
  66                 }
  67         }
  68         return 0;
  69 error:
  70         ret = rte_errno; /* Save rte_errno before cleanup. */
  71         do {
  72                 mlx5_txq_release(dev, i);
  73         } while (i-- != 0);
  74         rte_errno = ret; /* Restore rte_errno. */
  75         return -rte_errno;
  76 }
  77
  78 /**
  79  * Stop traffic on Rx queues.
  80  *
  81  * @param dev
  82  *   Pointer to Ethernet device structure.
  83  */
  84 static void
  85 mlx5_rxq_stop(struct rte_eth_dev *dev)
  86 {
  87         struct mlx5_priv *priv = dev->data->dev_private;
  88         unsigned int i;
  89
  90         for (i = 0; i != priv->rxqs_n; ++i)
  91                 mlx5_rxq_release(dev, i);
  92 }
  93
  94 /**
  95  * Start traffic on Rx queues.
  96  *
  97  * @param dev
  98  *   Pointer to Ethernet device structure.
  99  *
 100  * @return
 101  *   0 on success, a negative errno value otherwise and rte_errno is set.
 102  */
 103 static int
 104 mlx5_rxq_start(struct rte_eth_dev *dev)
 105 {
 106         struct mlx5_priv *priv = dev->data->dev_private;
 107         unsigned int i;
 108         int ret = 0;
 109         enum mlx5_rxq_obj_type obj_type = MLX5_RXQ_OBJ_TYPE_IBV;
 110         struct mlx5_rxq_data *rxq = NULL;
 111
 112         for (i = 0; i < priv->rxqs_n; ++i) {
 113                 rxq = (*priv->rxqs)[i];
 114
 115                 if (rxq && rxq->lro) {
 116                         obj_type =  MLX5_RXQ_OBJ_TYPE_DEVX_RQ;
 117                         break;
 118                 }
 119         }
 120         /* Allocate/reuse/resize mempool for Multi-Packet RQ. */
 121         if (mlx5_mprq_alloc_mp(dev)) {
 122                 /* Should not release Rx queues but return immediately. */
 123                 return -rte_errno;
 124         }
 125         for (i = 0; i != priv->rxqs_n; ++i) {
 126                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 127                 struct rte_mempool *mp;
 128
 129                 if (!rxq_ctrl)
 130                         continue;
 131                 if (rxq_ctrl->type == MLX5_RXQ_TYPE_HAIRPIN) {
 132                         rxq_ctrl->obj = mlx5_rxq_obj_new
 133                                 (dev, i, MLX5_RXQ_OBJ_TYPE_DEVX_HAIRPIN);
 134                         if (!rxq_ctrl->obj)
 135                                 goto error;
 136                         continue;
 137                 }
 138                 /* Pre-register Rx mempool. */
 139                 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
 140                      rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp;
 141                 DRV_LOG(DEBUG,
 142                         "port %u Rx queue %u registering"
 143                         " mp %s having %u chunks",
 144                         dev->data->port_id, rxq_ctrl->rxq.idx,
 145                         mp->name, mp->nb_mem_chunks);
 146                 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp);
 147                 ret = rxq_alloc_elts(rxq_ctrl);
 148                 if (ret)
 149                         goto error;
 150                 rxq_ctrl->obj = mlx5_rxq_obj_new(dev, i, obj_type);
 151                 if (!rxq_ctrl->obj)
 152                         goto error;
 153                 if (obj_type == MLX5_RXQ_OBJ_TYPE_IBV)
 154                         rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num;
 155                 else if (obj_type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ)
 156                         rxq_ctrl->wqn = rxq_ctrl->obj->rq->id;
 157         }
 158         return 0;
 159 error:
 160         ret = rte_errno; /* Save rte_errno before cleanup. */
 161         do {
 162                 mlx5_rxq_release(dev, i);
 163         } while (i-- != 0);
 164         rte_errno = ret; /* Restore rte_errno. */
 165         return -rte_errno;
 166 }
 167
 168 /**
 169  * Binds Tx queues to Rx queues for hairpin.
 170  *
 171  * Binds Tx queues to the target Rx queues.
 172  *
 173  * @param dev
 174  *   Pointer to Ethernet device structure.
 175  *
 176  * @return
 177  *   0 on success, a negative errno value otherwise and rte_errno is set.
 178  */
 179 static int
 180 mlx5_hairpin_bind(struct rte_eth_dev *dev)
 181 {
 182         struct mlx5_priv *priv = dev->data->dev_private;
 183         struct mlx5_devx_modify_sq_attr sq_attr = { 0 };
 184         struct mlx5_devx_modify_rq_attr rq_attr = { 0 };
 185         struct mlx5_txq_ctrl *txq_ctrl;
 186         struct mlx5_rxq_ctrl *rxq_ctrl;
 187         struct mlx5_devx_obj *sq;
 188         struct mlx5_devx_obj *rq;
 189         unsigned int i;
 190         int ret = 0;
 191
 192         for (i = 0; i != priv->txqs_n; ++i) {
 193                 txq_ctrl = mlx5_txq_get(dev, i);
 194                 if (!txq_ctrl)
 195                         continue;
 196                 if (txq_ctrl->type != MLX5_TXQ_TYPE_HAIRPIN) {
 197                         mlx5_txq_release(dev, i);
 198                         continue;
 199                 }
 200                 if (!txq_ctrl->obj) {
 201                         rte_errno = ENOMEM;
 202                         DRV_LOG(ERR, "port %u no txq object found: %d",
 203                                 dev->data->port_id, i);
 204                         mlx5_txq_release(dev, i);
 205                         return -rte_errno;
 206                 }
 207                 sq = txq_ctrl->obj->sq;
 208                 rxq_ctrl = mlx5_rxq_get(dev,
 209                                         txq_ctrl->hairpin_conf.peers[0].queue);
 210                 if (!rxq_ctrl) {
 211                         mlx5_txq_release(dev, i);
 212                         rte_errno = EINVAL;
 213                         DRV_LOG(ERR, "port %u no rxq object found: %d",
 214                                 dev->data->port_id,
 215                                 txq_ctrl->hairpin_conf.peers[0].queue);
 216                         return -rte_errno;
 217                 }
 218                 if (rxq_ctrl->type != MLX5_RXQ_TYPE_HAIRPIN ||
 219                     rxq_ctrl->hairpin_conf.peers[0].queue != i) {
 220                         rte_errno = ENOMEM;
 221                         DRV_LOG(ERR, "port %u Tx queue %d can't be binded to "
 222                                 "Rx queue %d", dev->data->port_id,
 223                                 i, txq_ctrl->hairpin_conf.peers[0].queue);
 224                         goto error;
 225                 }
 226                 rq = rxq_ctrl->obj->rq;
 227                 if (!rq) {
 228                         rte_errno = ENOMEM;
 229                         DRV_LOG(ERR, "port %u hairpin no matching rxq: %d",
 230                                 dev->data->port_id,
 231                                 txq_ctrl->hairpin_conf.peers[0].queue);
 232                         goto error;
 233                 }
 234                 sq_attr.state = MLX5_SQC_STATE_RDY;
 235                 sq_attr.sq_state = MLX5_SQC_STATE_RST;
 236                 sq_attr.hairpin_peer_rq = rq->id;
 237                 sq_attr.hairpin_peer_vhca = priv->config.hca_attr.vhca_id;
 238                 ret = mlx5_devx_cmd_modify_sq(sq, &sq_attr);
 239                 if (ret)
 240                         goto error;
 241                 rq_attr.state = MLX5_SQC_STATE_RDY;
 242                 rq_attr.rq_state = MLX5_SQC_STATE_RST;
 243                 rq_attr.hairpin_peer_sq = sq->id;
 244                 rq_attr.hairpin_peer_vhca = priv->config.hca_attr.vhca_id;
 245                 ret = mlx5_devx_cmd_modify_rq(rq, &rq_attr);
 246                 if (ret)
 247                         goto error;
 248                 mlx5_txq_release(dev, i);
 249                 mlx5_rxq_release(dev, txq_ctrl->hairpin_conf.peers[0].queue);
 250         }
 251         return 0;
 252 error:
 253         mlx5_txq_release(dev, i);
 254         mlx5_rxq_release(dev, txq_ctrl->hairpin_conf.peers[0].queue);
 255         return -rte_errno;
 256 }
 257
 258 /**
 259  * DPDK callback to start the device.
 260  *
 261  * Simulate device start by attaching all configured flows.
 262  *
 263  * @param dev
 264  *   Pointer to Ethernet device structure.
 265  *
 266  * @return
 267  *   0 on success, a negative errno value otherwise and rte_errno is set.
 268  */
 269 int
 270 mlx5_dev_start(struct rte_eth_dev *dev)
 271 {
 272         int ret;
 273         int fine_inline;
 274
 275         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 276         fine_inline = rte_mbuf_dynflag_lookup
 277                 (RTE_PMD_MLX5_FINE_GRANULARITY_INLINE, NULL);
 278         if (fine_inline > 0)
 279                 rte_net_mlx5_dynf_inline_mask = 1UL << fine_inline;
 280         else
 281                 rte_net_mlx5_dynf_inline_mask = 0;
 282         if (dev->data->nb_rx_queues > 0) {
 283                 ret = mlx5_dev_configure_rss_reta(dev);
 284                 if (ret) {
 285                         DRV_LOG(ERR, "port %u reta config failed: %s",
 286                                 dev->data->port_id, strerror(rte_errno));
 287                         return -rte_errno;
 288                 }
 289         }
 290         ret = mlx5_txq_start(dev);
 291         if (ret) {
 292                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 293                         dev->data->port_id, strerror(rte_errno));
 294                 return -rte_errno;
 295         }
 296         ret = mlx5_rxq_start(dev);
 297         if (ret) {
 298                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 299                         dev->data->port_id, strerror(rte_errno));
 300                 mlx5_txq_stop(dev);
 301                 return -rte_errno;
 302         }
 303         ret = mlx5_hairpin_bind(dev);
 304         if (ret) {
 305                 DRV_LOG(ERR, "port %u hairpin binding failed: %s",
 306                         dev->data->port_id, strerror(rte_errno));
 307                 mlx5_txq_stop(dev);
 308                 return -rte_errno;
 309         }
 310         /* Set started flag here for the following steps like control flow. */
 311         dev->data->dev_started = 1;
 312         ret = mlx5_rx_intr_vec_enable(dev);
 313         if (ret) {
 314                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 315                         dev->data->port_id);
 316                 goto error;
 317         }
 318         mlx5_stats_init(dev);
 319         ret = mlx5_traffic_enable(dev);
 320         if (ret) {
 321                 DRV_LOG(ERR, "port %u failed to set defaults flows",
 322                         dev->data->port_id);
 323                 goto error;
 324         }
 325         /*
 326          * In non-cached mode, it only needs to start the default mreg copy
 327          * action and no flow created by application exists anymore.
 328          * But it is worth wrapping the interface for further usage.
 329          */
 330         ret = mlx5_flow_start_default(dev);
 331         if (ret) {
 332                 DRV_LOG(DEBUG, "port %u failed to start default actions: %s",
 333                         dev->data->port_id, strerror(rte_errno));
 334                 goto error;
 335         }
 336         rte_wmb();
 337         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 338         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 339         /* Enable datapath on secondary process. */
 340         mlx5_mp_req_start_rxtx(dev);
 341         mlx5_dev_interrupt_handler_install(dev);
 342         return 0;
 343 error:
 344         ret = rte_errno; /* Save rte_errno before cleanup. */
 345         /* Rollback. */
 346         dev->data->dev_started = 0;
 347         mlx5_flow_stop_default(dev);
 348         mlx5_traffic_disable(dev);
 349         mlx5_txq_stop(dev);
 350         mlx5_rxq_stop(dev);
 351         rte_errno = ret; /* Restore rte_errno. */
 352         return -rte_errno;
 353 }
 354
 355 /**
 356  * DPDK callback to stop the device.
 357  *
 358  * Simulate device stop by detaching all configured flows.
 359  *
 360  * @param dev
 361  *   Pointer to Ethernet device structure.
 362  */
 363 void
 364 mlx5_dev_stop(struct rte_eth_dev *dev)
 365 {
 366         struct mlx5_priv *priv = dev->data->dev_private;
 367
 368         dev->data->dev_started = 0;
 369         /* Prevent crashes when queues are still in use. */
 370         dev->rx_pkt_burst = removed_rx_burst;
 371         dev->tx_pkt_burst = removed_tx_burst;
 372         rte_wmb();
 373         /* Disable datapath on secondary process. */
 374         mlx5_mp_req_stop_rxtx(dev);
 375         usleep(1000 * priv->rxqs_n);
 376         DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id);
 377         mlx5_flow_stop_default(dev);
 378         /* Control flows for default traffic can be removed firstly. */
 379         mlx5_traffic_disable(dev);
 380         /* All RX queue flags will be cleared in the flush interface. */
 381         mlx5_flow_list_flush(dev, &priv->flows, true);
 382         mlx5_rx_intr_vec_disable(dev);
 383         mlx5_dev_interrupt_handler_uninstall(dev);
 384         mlx5_txq_stop(dev);
 385         mlx5_rxq_stop(dev);
 386 }
 387
 388 /**
 389  * Enable traffic flows configured by control plane
 390  *
 391  * @param dev
 392  *   Pointer to Ethernet device private data.
 393  * @param dev
 394  *   Pointer to Ethernet device structure.
 395  *
 396  * @return
 397  *   0 on success, a negative errno value otherwise and rte_errno is set.
 398  */
 399 int
 400 mlx5_traffic_enable(struct rte_eth_dev *dev)
 401 {
 402         struct mlx5_priv *priv = dev->data->dev_private;
 403         struct rte_flow_item_eth bcast = {
 404                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 405         };
 406         struct rte_flow_item_eth ipv6_multi_spec = {
 407                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 408         };
 409         struct rte_flow_item_eth ipv6_multi_mask = {
 410                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 411         };
 412         struct rte_flow_item_eth unicast = {
 413                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 414         };
 415         struct rte_flow_item_eth unicast_mask = {
 416                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 417         };
 418         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 419         const struct rte_ether_addr cmp = {
 420                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 421         };
 422         unsigned int i;
 423         unsigned int j;
 424         int ret;
 425
 426         /*
 427          * Hairpin txq default flow should be created no matter if it is
 428          * isolation mode. Or else all the packets to be sent will be sent
 429          * out directly without the TX flow actions, e.g. encapsulation.
 430          */
 431         for (i = 0; i != priv->txqs_n; ++i) {
 432                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i);
 433                 if (!txq_ctrl)
 434                         continue;
 435                 if (txq_ctrl->type == MLX5_TXQ_TYPE_HAIRPIN) {
 436                         ret = mlx5_ctrl_flow_source_queue(dev, i);
 437                         if (ret) {
 438                                 mlx5_txq_release(dev, i);
 439                                 goto error;
 440                         }
 441                 }
 442                 mlx5_txq_release(dev, i);
 443         }
 444         if (priv->config.dv_esw_en && !priv->config.vf) {
 445                 if (mlx5_flow_create_esw_table_zero_flow(dev))
 446                         priv->fdb_def_rule = 1;
 447                 else
 448                         DRV_LOG(INFO, "port %u FDB default rule cannot be"
 449                                 " configured - only Eswitch group 0 flows are"
 450                                 " supported.", dev->data->port_id);
 451         }
 452         if (priv->isolated)
 453                 return 0;
 454         if (dev->data->promiscuous) {
 455                 struct rte_flow_item_eth promisc = {
 456                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 457                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 458                         .type = 0,
 459                 };
 460
 461                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 462                 if (ret)
 463                         goto error;
 464         }
 465         if (dev->data->all_multicast) {
 466                 struct rte_flow_item_eth multicast = {
 467                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 468                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 469                         .type = 0,
 470                 };
 471
 472                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 473                 if (ret)
 474                         goto error;
 475         } else {
 476                 /* Add broadcast/multicast flows. */
 477                 for (i = 0; i != vlan_filter_n; ++i) {
 478                         uint16_t vlan = priv->vlan_filter[i];
 479
 480                         struct rte_flow_item_vlan vlan_spec = {
 481                                 .tci = rte_cpu_to_be_16(vlan),
 482                         };
 483                         struct rte_flow_item_vlan vlan_mask =
 484                                 rte_flow_item_vlan_mask;
 485
 486                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 487                                                   &vlan_spec, &vlan_mask);
 488                         if (ret)
 489                                 goto error;
 490                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 491                                                   &ipv6_multi_mask,
 492                                                   &vlan_spec, &vlan_mask);
 493                         if (ret)
 494                                 goto error;
 495                 }
 496                 if (!vlan_filter_n) {
 497                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 498                         if (ret)
 499                                 goto error;
 500                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 501                                              &ipv6_multi_mask);
 502                         if (ret)
 503                                 goto error;
 504                 }
 505         }
 506         /* Add MAC address flows. */
 507         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 508                 struct rte_ether_addr *mac = &dev->data->mac_addrs[i];
 509
 510                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 511                         continue;
 512                 memcpy(&unicast.dst.addr_bytes,
 513                        mac->addr_bytes,
 514                        RTE_ETHER_ADDR_LEN);
 515                 for (j = 0; j != vlan_filter_n; ++j) {
 516                         uint16_t vlan = priv->vlan_filter[j];
 517
 518                         struct rte_flow_item_vlan vlan_spec = {
 519                                 .tci = rte_cpu_to_be_16(vlan),
 520                         };
 521                         struct rte_flow_item_vlan vlan_mask =
 522                                 rte_flow_item_vlan_mask;
 523
 524                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 525                                                   &unicast_mask,
 526                                                   &vlan_spec,
 527                                                   &vlan_mask);
 528                         if (ret)
 529                                 goto error;
 530                 }
 531                 if (!vlan_filter_n) {
 532                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 533                         if (ret)
 534                                 goto error;
 535                 }
 536         }
 537         return 0;
 538 error:
 539         ret = rte_errno; /* Save rte_errno before cleanup. */
 540         mlx5_flow_list_flush(dev, &priv->ctrl_flows, false);
 541         rte_errno = ret; /* Restore rte_errno. */
 542         return -rte_errno;
 543 }
 544
 545
 546 /**
 547  * Disable traffic flows configured by control plane
 548  *
 549  * @param dev
 550  *   Pointer to Ethernet device private data.
 551  */
 552 void
 553 mlx5_traffic_disable(struct rte_eth_dev *dev)
 554 {
 555         struct mlx5_priv *priv = dev->data->dev_private;
 556
 557         mlx5_flow_list_flush(dev, &priv->ctrl_flows, false);
 558 }
 559
 560 /**
 561  * Restart traffic flows configured by control plane
 562  *
 563  * @param dev
 564  *   Pointer to Ethernet device private data.
 565  *
 566  * @return
 567  *   0 on success, a negative errno value otherwise and rte_errno is set.
 568  */
 569 int
 570 mlx5_traffic_restart(struct rte_eth_dev *dev)
 571 {
 572         if (dev->data->dev_started) {
 573                 mlx5_traffic_disable(dev);
 574                 return mlx5_traffic_enable(dev);
 575         }
 576         return 0;
 577 }