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
  17 /**
  18  * Stop traffic on Tx queues.
  19  *
  20  * @param dev
  21  *   Pointer to Ethernet device structure.
  22  */
  23 static void
  24 mlx5_txq_stop(struct rte_eth_dev *dev)
  25 {
  26         struct mlx5_priv *priv = dev->data->dev_private;
  27         unsigned int i;
  28
  29         for (i = 0; i != priv->txqs_n; ++i)
  30                 mlx5_txq_release(dev, i);
  31 }
  32
  33 /**
  34  * Start traffic on Tx queues.
  35  *
  36  * @param dev
  37  *   Pointer to Ethernet device structure.
  38  *
  39  * @return
  40  *   0 on success, a negative errno value otherwise and rte_errno is set.
  41  */
  42 static int
  43 mlx5_txq_start(struct rte_eth_dev *dev)
  44 {
  45         struct mlx5_priv *priv = dev->data->dev_private;
  46         unsigned int i;
  47         int ret;
  48
  49         for (i = 0; i != priv->txqs_n; ++i) {
  50                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i);
  51
  52                 if (!txq_ctrl)
  53                         continue;
  54                 if (txq_ctrl->type == MLX5_TXQ_TYPE_HAIRPIN) {
  55                         txq_ctrl->obj = mlx5_txq_obj_new
  56                                 (dev, i, MLX5_TXQ_OBJ_TYPE_DEVX_HAIRPIN);
  57                 } else {
  58                         txq_alloc_elts(txq_ctrl);
  59                         txq_ctrl->obj = mlx5_txq_obj_new
  60                                 (dev, i, MLX5_TXQ_OBJ_TYPE_IBV);
  61                 }
  62                 if (!txq_ctrl->obj) {
  63                         rte_errno = ENOMEM;
  64                         goto error;
  65                 }
  66         }
  67         return 0;
  68 error:
  69         ret = rte_errno; /* Save rte_errno before cleanup. */
  70         do {
  71                 mlx5_txq_release(dev, i);
  72         } while (i-- != 0);
  73         rte_errno = ret; /* Restore rte_errno. */
  74         return -rte_errno;
  75 }
  76
  77 /**
  78  * Stop traffic on Rx queues.
  79  *
  80  * @param dev
  81  *   Pointer to Ethernet device structure.
  82  */
  83 static void
  84 mlx5_rxq_stop(struct rte_eth_dev *dev)
  85 {
  86         struct mlx5_priv *priv = dev->data->dev_private;
  87         unsigned int i;
  88
  89         for (i = 0; i != priv->rxqs_n; ++i)
  90                 mlx5_rxq_release(dev, i);
  91 }
  92
  93 /**
  94  * Start traffic on Rx queues.
  95  *
  96  * @param dev
  97  *   Pointer to Ethernet device structure.
  98  *
  99  * @return
 100  *   0 on success, a negative errno value otherwise and rte_errno is set.
 101  */
 102 static int
 103 mlx5_rxq_start(struct rte_eth_dev *dev)
 104 {
 105         struct mlx5_priv *priv = dev->data->dev_private;
 106         unsigned int i;
 107         int ret = 0;
 108         enum mlx5_rxq_obj_type obj_type = MLX5_RXQ_OBJ_TYPE_IBV;
 109         struct mlx5_rxq_data *rxq = NULL;
 110
 111         for (i = 0; i < priv->rxqs_n; ++i) {
 112                 rxq = (*priv->rxqs)[i];
 113
 114                 if (rxq && rxq->lro) {
 115                         obj_type =  MLX5_RXQ_OBJ_TYPE_DEVX_RQ;
 116                         break;
 117                 }
 118         }
 119         /* Allocate/reuse/resize mempool for Multi-Packet RQ. */
 120         if (mlx5_mprq_alloc_mp(dev)) {
 121                 /* Should not release Rx queues but return immediately. */
 122                 return -rte_errno;
 123         }
 124         for (i = 0; i != priv->rxqs_n; ++i) {
 125                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 126                 struct rte_mempool *mp;
 127
 128                 if (!rxq_ctrl)
 129                         continue;
 130                 if (rxq_ctrl->type == MLX5_RXQ_TYPE_HAIRPIN) {
 131                         rxq_ctrl->obj = mlx5_rxq_obj_new
 132                                 (dev, i, MLX5_RXQ_OBJ_TYPE_DEVX_HAIRPIN);
 133                         if (!rxq_ctrl->obj)
 134                                 goto error;
 135                         continue;
 136                 }
 137                 /* Pre-register Rx mempool. */
 138                 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
 139                      rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp;
 140                 DRV_LOG(DEBUG,
 141                         "port %u Rx queue %u registering"
 142                         " mp %s having %u chunks",
 143                         dev->data->port_id, rxq_ctrl->rxq.idx,
 144                         mp->name, mp->nb_mem_chunks);
 145                 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp);
 146                 ret = rxq_alloc_elts(rxq_ctrl);
 147                 if (ret)
 148                         goto error;
 149                 rxq_ctrl->obj = mlx5_rxq_obj_new(dev, i, obj_type);
 150                 if (!rxq_ctrl->obj)
 151                         goto error;
 152                 if (obj_type == MLX5_RXQ_OBJ_TYPE_IBV)
 153                         rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num;
 154                 else if (obj_type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ)
 155                         rxq_ctrl->wqn = rxq_ctrl->obj->rq->id;
 156         }
 157         return 0;
 158 error:
 159         ret = rte_errno; /* Save rte_errno before cleanup. */
 160         do {
 161                 mlx5_rxq_release(dev, i);
 162         } while (i-- != 0);
 163         rte_errno = ret; /* Restore rte_errno. */
 164         return -rte_errno;
 165 }
 166
 167 /**
 168  * Binds Tx queues to Rx queues for hairpin.
 169  *
 170  * Binds Tx queues to the target Rx queues.
 171  *
 172  * @param dev
 173  *   Pointer to Ethernet device structure.
 174  *
 175  * @return
 176  *   0 on success, a negative errno value otherwise and rte_errno is set.
 177  */
 178 static int
 179 mlx5_hairpin_bind(struct rte_eth_dev *dev)
 180 {
 181         struct mlx5_priv *priv = dev->data->dev_private;
 182         struct mlx5_devx_modify_sq_attr sq_attr = { 0 };
 183         struct mlx5_devx_modify_rq_attr rq_attr = { 0 };
 184         struct mlx5_txq_ctrl *txq_ctrl;
 185         struct mlx5_rxq_ctrl *rxq_ctrl;
 186         struct mlx5_devx_obj *sq;
 187         struct mlx5_devx_obj *rq;
 188         unsigned int i;
 189         int ret = 0;
 190
 191         for (i = 0; i != priv->txqs_n; ++i) {
 192                 txq_ctrl = mlx5_txq_get(dev, i);
 193                 if (!txq_ctrl)
 194                         continue;
 195                 if (txq_ctrl->type != MLX5_TXQ_TYPE_HAIRPIN) {
 196                         mlx5_txq_release(dev, i);
 197                         continue;
 198                 }
 199                 if (!txq_ctrl->obj) {
 200                         rte_errno = ENOMEM;
 201                         DRV_LOG(ERR, "port %u no txq object found: %d",
 202                                 dev->data->port_id, i);
 203                         mlx5_txq_release(dev, i);
 204                         return -rte_errno;
 205                 }
 206                 sq = txq_ctrl->obj->sq;
 207                 rxq_ctrl = mlx5_rxq_get(dev,
 208                                         txq_ctrl->hairpin_conf.peers[0].queue);
 209                 if (!rxq_ctrl) {
 210                         mlx5_txq_release(dev, i);
 211                         rte_errno = EINVAL;
 212                         DRV_LOG(ERR, "port %u no rxq object found: %d",
 213                                 dev->data->port_id,
 214                                 txq_ctrl->hairpin_conf.peers[0].queue);
 215                         return -rte_errno;
 216                 }
 217                 if (rxq_ctrl->type != MLX5_RXQ_TYPE_HAIRPIN ||
 218                     rxq_ctrl->hairpin_conf.peers[0].queue != i) {
 219                         rte_errno = ENOMEM;
 220                         DRV_LOG(ERR, "port %u Tx queue %d can't be binded to "
 221                                 "Rx queue %d", dev->data->port_id,
 222                                 i, txq_ctrl->hairpin_conf.peers[0].queue);
 223                         goto error;
 224                 }
 225                 rq = rxq_ctrl->obj->rq;
 226                 if (!rq) {
 227                         rte_errno = ENOMEM;
 228                         DRV_LOG(ERR, "port %u hairpin no matching rxq: %d",
 229                                 dev->data->port_id,
 230                                 txq_ctrl->hairpin_conf.peers[0].queue);
 231                         goto error;
 232                 }
 233                 sq_attr.state = MLX5_SQC_STATE_RDY;
 234                 sq_attr.sq_state = MLX5_SQC_STATE_RST;
 235                 sq_attr.hairpin_peer_rq = rq->id;
 236                 sq_attr.hairpin_peer_vhca = priv->config.hca_attr.vhca_id;
 237                 ret = mlx5_devx_cmd_modify_sq(sq, &sq_attr);
 238                 if (ret)
 239                         goto error;
 240                 rq_attr.state = MLX5_SQC_STATE_RDY;
 241                 rq_attr.rq_state = MLX5_SQC_STATE_RST;
 242                 rq_attr.hairpin_peer_sq = sq->id;
 243                 rq_attr.hairpin_peer_vhca = priv->config.hca_attr.vhca_id;
 244                 ret = mlx5_devx_cmd_modify_rq(rq, &rq_attr);
 245                 if (ret)
 246                         goto error;
 247                 mlx5_txq_release(dev, i);
 248                 mlx5_rxq_release(dev, txq_ctrl->hairpin_conf.peers[0].queue);
 249         }
 250         return 0;
 251 error:
 252         mlx5_txq_release(dev, i);
 253         mlx5_rxq_release(dev, txq_ctrl->hairpin_conf.peers[0].queue);
 254         return -rte_errno;
 255 }
 256
 257 /**
 258  * DPDK callback to start the device.
 259  *
 260  * Simulate device start by attaching all configured flows.
 261  *
 262  * @param dev
 263  *   Pointer to Ethernet device structure.
 264  *
 265  * @return
 266  *   0 on success, a negative errno value otherwise and rte_errno is set.
 267  */
 268 int
 269 mlx5_dev_start(struct rte_eth_dev *dev)
 270 {
 271         struct mlx5_priv *priv = dev->data->dev_private;
 272         int ret;
 273
 274         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 275         ret = mlx5_dev_configure_rss_reta(dev);
 276         if (ret) {
 277                 DRV_LOG(ERR, "port %u reta config failed: %s",
 278                         dev->data->port_id, strerror(rte_errno));
 279                 return -rte_errno;
 280         }
 281         ret = mlx5_txq_start(dev);
 282         if (ret) {
 283                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 284                         dev->data->port_id, strerror(rte_errno));
 285                 return -rte_errno;
 286         }
 287         ret = mlx5_rxq_start(dev);
 288         if (ret) {
 289                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 290                         dev->data->port_id, strerror(rte_errno));
 291                 mlx5_txq_stop(dev);
 292                 return -rte_errno;
 293         }
 294         ret = mlx5_hairpin_bind(dev);
 295         if (ret) {
 296                 DRV_LOG(ERR, "port %u hairpin binding failed: %s",
 297                         dev->data->port_id, strerror(rte_errno));
 298                 mlx5_txq_stop(dev);
 299                 return -rte_errno;
 300         }
 301         dev->data->dev_started = 1;
 302         ret = mlx5_rx_intr_vec_enable(dev);
 303         if (ret) {
 304                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 305                         dev->data->port_id);
 306                 goto error;
 307         }
 308         mlx5_stats_init(dev);
 309         ret = mlx5_traffic_enable(dev);
 310         if (ret) {
 311                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 312                         dev->data->port_id);
 313                 goto error;
 314         }
 315         ret = mlx5_flow_start(dev, &priv->flows);
 316         if (ret) {
 317                 DRV_LOG(DEBUG, "port %u failed to set flows",
 318                         dev->data->port_id);
 319                 goto error;
 320         }
 321         rte_wmb();
 322         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 323         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 324         /* Enable datapath on secondary process. */
 325         mlx5_mp_req_start_rxtx(dev);
 326         mlx5_dev_interrupt_handler_install(dev);
 327         return 0;
 328 error:
 329         ret = rte_errno; /* Save rte_errno before cleanup. */
 330         /* Rollback. */
 331         dev->data->dev_started = 0;
 332         mlx5_flow_stop(dev, &priv->flows);
 333         mlx5_traffic_disable(dev);
 334         mlx5_txq_stop(dev);
 335         mlx5_rxq_stop(dev);
 336         rte_errno = ret; /* Restore rte_errno. */
 337         return -rte_errno;
 338 }
 339
 340 /**
 341  * DPDK callback to stop the device.
 342  *
 343  * Simulate device stop by detaching all configured flows.
 344  *
 345  * @param dev
 346  *   Pointer to Ethernet device structure.
 347  */
 348 void
 349 mlx5_dev_stop(struct rte_eth_dev *dev)
 350 {
 351         struct mlx5_priv *priv = dev->data->dev_private;
 352
 353         dev->data->dev_started = 0;
 354         /* Prevent crashes when queues are still in use. */
 355         dev->rx_pkt_burst = removed_rx_burst;
 356         dev->tx_pkt_burst = removed_tx_burst;
 357         rte_wmb();
 358         /* Disable datapath on secondary process. */
 359         mlx5_mp_req_stop_rxtx(dev);
 360         usleep(1000 * priv->rxqs_n);
 361         DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id);
 362         mlx5_flow_stop(dev, &priv->flows);
 363         mlx5_traffic_disable(dev);
 364         mlx5_rx_intr_vec_disable(dev);
 365         mlx5_dev_interrupt_handler_uninstall(dev);
 366         mlx5_txq_stop(dev);
 367         mlx5_rxq_stop(dev);
 368 }
 369
 370 /**
 371  * Enable traffic flows configured by control plane
 372  *
 373  * @param dev
 374  *   Pointer to Ethernet device private data.
 375  * @param dev
 376  *   Pointer to Ethernet device structure.
 377  *
 378  * @return
 379  *   0 on success, a negative errno value otherwise and rte_errno is set.
 380  */
 381 int
 382 mlx5_traffic_enable(struct rte_eth_dev *dev)
 383 {
 384         struct mlx5_priv *priv = dev->data->dev_private;
 385         struct rte_flow_item_eth bcast = {
 386                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 387         };
 388         struct rte_flow_item_eth ipv6_multi_spec = {
 389                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 390         };
 391         struct rte_flow_item_eth ipv6_multi_mask = {
 392                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 393         };
 394         struct rte_flow_item_eth unicast = {
 395                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 396         };
 397         struct rte_flow_item_eth unicast_mask = {
 398                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 399         };
 400         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 401         const struct rte_ether_addr cmp = {
 402                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 403         };
 404         unsigned int i;
 405         unsigned int j;
 406         int ret;
 407
 408         /*
 409          * Hairpin txq default flow should be created no matter if it is
 410          * isolation mode. Or else all the packets to be sent will be sent
 411          * out directly without the TX flow actions, e.g. encapsulation.
 412          */
 413         for (i = 0; i != priv->txqs_n; ++i) {
 414                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i);
 415                 if (!txq_ctrl)
 416                         continue;
 417                 if (txq_ctrl->type == MLX5_TXQ_TYPE_HAIRPIN) {
 418                         ret = mlx5_ctrl_flow_source_queue(dev, i);
 419                         if (ret) {
 420                                 mlx5_txq_release(dev, i);
 421                                 goto error;
 422                         }
 423                 }
 424                 mlx5_txq_release(dev, i);
 425         }
 426         if (priv->config.dv_esw_en && !priv->config.vf)
 427                 if (!mlx5_flow_create_esw_table_zero_flow(dev))
 428                         goto error;
 429         if (priv->isolated)
 430                 return 0;
 431         if (dev->data->promiscuous) {
 432                 struct rte_flow_item_eth promisc = {
 433                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 434                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 435                         .type = 0,
 436                 };
 437
 438                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 439                 if (ret)
 440                         goto error;
 441         }
 442         if (dev->data->all_multicast) {
 443                 struct rte_flow_item_eth multicast = {
 444                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 445                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 446                         .type = 0,
 447                 };
 448
 449                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 450                 if (ret)
 451                         goto error;
 452         } else {
 453                 /* Add broadcast/multicast flows. */
 454                 for (i = 0; i != vlan_filter_n; ++i) {
 455                         uint16_t vlan = priv->vlan_filter[i];
 456
 457                         struct rte_flow_item_vlan vlan_spec = {
 458                                 .tci = rte_cpu_to_be_16(vlan),
 459                         };
 460                         struct rte_flow_item_vlan vlan_mask =
 461                                 rte_flow_item_vlan_mask;
 462
 463                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 464                                                   &vlan_spec, &vlan_mask);
 465                         if (ret)
 466                                 goto error;
 467                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 468                                                   &ipv6_multi_mask,
 469                                                   &vlan_spec, &vlan_mask);
 470                         if (ret)
 471                                 goto error;
 472                 }
 473                 if (!vlan_filter_n) {
 474                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 475                         if (ret)
 476                                 goto error;
 477                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 478                                              &ipv6_multi_mask);
 479                         if (ret)
 480                                 goto error;
 481                 }
 482         }
 483         /* Add MAC address flows. */
 484         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 485                 struct rte_ether_addr *mac = &dev->data->mac_addrs[i];
 486
 487                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 488                         continue;
 489                 memcpy(&unicast.dst.addr_bytes,
 490                        mac->addr_bytes,
 491                        RTE_ETHER_ADDR_LEN);
 492                 for (j = 0; j != vlan_filter_n; ++j) {
 493                         uint16_t vlan = priv->vlan_filter[j];
 494
 495                         struct rte_flow_item_vlan vlan_spec = {
 496                                 .tci = rte_cpu_to_be_16(vlan),
 497                         };
 498                         struct rte_flow_item_vlan vlan_mask =
 499                                 rte_flow_item_vlan_mask;
 500
 501                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 502                                                   &unicast_mask,
 503                                                   &vlan_spec,
 504                                                   &vlan_mask);
 505                         if (ret)
 506                                 goto error;
 507                 }
 508                 if (!vlan_filter_n) {
 509                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 510                         if (ret)
 511                                 goto error;
 512                 }
 513         }
 514         return 0;
 515 error:
 516         ret = rte_errno; /* Save rte_errno before cleanup. */
 517         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 518         rte_errno = ret; /* Restore rte_errno. */
 519         return -rte_errno;
 520 }
 521
 522
 523 /**
 524  * Disable traffic flows configured by control plane
 525  *
 526  * @param dev
 527  *   Pointer to Ethernet device private data.
 528  */
 529 void
 530 mlx5_traffic_disable(struct rte_eth_dev *dev)
 531 {
 532         struct mlx5_priv *priv = dev->data->dev_private;
 533
 534         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 535 }
 536
 537 /**
 538  * Restart traffic flows configured by control plane
 539  *
 540  * @param dev
 541  *   Pointer to Ethernet device private data.
 542  *
 543  * @return
 544  *   0 on success, a negative errno value otherwise and rte_errno is set.
 545  */
 546 int
 547 mlx5_traffic_restart(struct rte_eth_dev *dev)
 548 {
 549         if (dev->data->dev_started) {
 550                 mlx5_traffic_disable(dev);
 551                 return mlx5_traffic_enable(dev);
 552         }
 553         return 0;
 554 }