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