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  * DPDK callback to start the device.
 166  *
 167  * Simulate device start by attaching all configured flows.
 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 int
 176 mlx5_dev_start(struct rte_eth_dev *dev)
 177 {
 178         struct mlx5_priv *priv = dev->data->dev_private;
 179         int ret;
 180
 181         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 182         ret = mlx5_txq_start(dev);
 183         if (ret) {
 184                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 185                         dev->data->port_id, strerror(rte_errno));
 186                 return -rte_errno;
 187         }
 188         ret = mlx5_rxq_start(dev);
 189         if (ret) {
 190                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 191                         dev->data->port_id, strerror(rte_errno));
 192                 mlx5_txq_stop(dev);
 193                 return -rte_errno;
 194         }
 195         dev->data->dev_started = 1;
 196         ret = mlx5_rx_intr_vec_enable(dev);
 197         if (ret) {
 198                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 199                         dev->data->port_id);
 200                 goto error;
 201         }
 202         mlx5_stats_init(dev);
 203         ret = mlx5_traffic_enable(dev);
 204         if (ret) {
 205                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 206                         dev->data->port_id);
 207                 goto error;
 208         }
 209         ret = mlx5_flow_start(dev, &priv->flows);
 210         if (ret) {
 211                 DRV_LOG(DEBUG, "port %u failed to set flows",
 212                         dev->data->port_id);
 213                 goto error;
 214         }
 215         rte_wmb();
 216         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 217         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 218         /* Enable datapath on secondary process. */
 219         mlx5_mp_req_start_rxtx(dev);
 220         mlx5_dev_interrupt_handler_install(dev);
 221         return 0;
 222 error:
 223         ret = rte_errno; /* Save rte_errno before cleanup. */
 224         /* Rollback. */
 225         dev->data->dev_started = 0;
 226         mlx5_flow_stop(dev, &priv->flows);
 227         mlx5_traffic_disable(dev);
 228         mlx5_txq_stop(dev);
 229         mlx5_rxq_stop(dev);
 230         rte_errno = ret; /* Restore rte_errno. */
 231         return -rte_errno;
 232 }
 233
 234 /**
 235  * DPDK callback to stop the device.
 236  *
 237  * Simulate device stop by detaching all configured flows.
 238  *
 239  * @param dev
 240  *   Pointer to Ethernet device structure.
 241  */
 242 void
 243 mlx5_dev_stop(struct rte_eth_dev *dev)
 244 {
 245         struct mlx5_priv *priv = dev->data->dev_private;
 246
 247         dev->data->dev_started = 0;
 248         /* Prevent crashes when queues are still in use. */
 249         dev->rx_pkt_burst = removed_rx_burst;
 250         dev->tx_pkt_burst = removed_tx_burst;
 251         rte_wmb();
 252         /* Disable datapath on secondary process. */
 253         mlx5_mp_req_stop_rxtx(dev);
 254         usleep(1000 * priv->rxqs_n);
 255         DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id);
 256         mlx5_flow_stop(dev, &priv->flows);
 257         mlx5_traffic_disable(dev);
 258         mlx5_rx_intr_vec_disable(dev);
 259         mlx5_dev_interrupt_handler_uninstall(dev);
 260         mlx5_txq_stop(dev);
 261         mlx5_rxq_stop(dev);
 262 }
 263
 264 /**
 265  * Enable traffic flows configured by control plane
 266  *
 267  * @param dev
 268  *   Pointer to Ethernet device private data.
 269  * @param dev
 270  *   Pointer to Ethernet device structure.
 271  *
 272  * @return
 273  *   0 on success, a negative errno value otherwise and rte_errno is set.
 274  */
 275 int
 276 mlx5_traffic_enable(struct rte_eth_dev *dev)
 277 {
 278         struct mlx5_priv *priv = dev->data->dev_private;
 279         struct rte_flow_item_eth bcast = {
 280                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 281         };
 282         struct rte_flow_item_eth ipv6_multi_spec = {
 283                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 284         };
 285         struct rte_flow_item_eth ipv6_multi_mask = {
 286                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 287         };
 288         struct rte_flow_item_eth unicast = {
 289                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 290         };
 291         struct rte_flow_item_eth unicast_mask = {
 292                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 293         };
 294         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 295         const struct rte_ether_addr cmp = {
 296                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 297         };
 298         unsigned int i;
 299         unsigned int j;
 300         int ret;
 301
 302         if (priv->config.dv_esw_en && !priv->config.vf)
 303                 if (!mlx5_flow_create_esw_table_zero_flow(dev))
 304                         goto error;
 305         if (priv->isolated)
 306                 return 0;
 307         if (dev->data->promiscuous) {
 308                 struct rte_flow_item_eth promisc = {
 309                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 310                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 311                         .type = 0,
 312                 };
 313
 314                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 315                 if (ret)
 316                         goto error;
 317         }
 318         if (dev->data->all_multicast) {
 319                 struct rte_flow_item_eth multicast = {
 320                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 321                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 322                         .type = 0,
 323                 };
 324
 325                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 326                 if (ret)
 327                         goto error;
 328         } else {
 329                 /* Add broadcast/multicast flows. */
 330                 for (i = 0; i != vlan_filter_n; ++i) {
 331                         uint16_t vlan = priv->vlan_filter[i];
 332
 333                         struct rte_flow_item_vlan vlan_spec = {
 334                                 .tci = rte_cpu_to_be_16(vlan),
 335                         };
 336                         struct rte_flow_item_vlan vlan_mask =
 337                                 rte_flow_item_vlan_mask;
 338
 339                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 340                                                   &vlan_spec, &vlan_mask);
 341                         if (ret)
 342                                 goto error;
 343                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 344                                                   &ipv6_multi_mask,
 345                                                   &vlan_spec, &vlan_mask);
 346                         if (ret)
 347                                 goto error;
 348                 }
 349                 if (!vlan_filter_n) {
 350                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 351                         if (ret)
 352                                 goto error;
 353                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 354                                              &ipv6_multi_mask);
 355                         if (ret)
 356                                 goto error;
 357                 }
 358         }
 359         /* Add MAC address flows. */
 360         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 361                 struct rte_ether_addr *mac = &dev->data->mac_addrs[i];
 362
 363                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 364                         continue;
 365                 memcpy(&unicast.dst.addr_bytes,
 366                        mac->addr_bytes,
 367                        RTE_ETHER_ADDR_LEN);
 368                 for (j = 0; j != vlan_filter_n; ++j) {
 369                         uint16_t vlan = priv->vlan_filter[j];
 370
 371                         struct rte_flow_item_vlan vlan_spec = {
 372                                 .tci = rte_cpu_to_be_16(vlan),
 373                         };
 374                         struct rte_flow_item_vlan vlan_mask =
 375                                 rte_flow_item_vlan_mask;
 376
 377                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 378                                                   &unicast_mask,
 379                                                   &vlan_spec,
 380                                                   &vlan_mask);
 381                         if (ret)
 382                                 goto error;
 383                 }
 384                 if (!vlan_filter_n) {
 385                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 386                         if (ret)
 387                                 goto error;
 388                 }
 389         }
 390         return 0;
 391 error:
 392         ret = rte_errno; /* Save rte_errno before cleanup. */
 393         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 394         rte_errno = ret; /* Restore rte_errno. */
 395         return -rte_errno;
 396 }
 397
 398
 399 /**
 400  * Disable traffic flows configured by control plane
 401  *
 402  * @param dev
 403  *   Pointer to Ethernet device private data.
 404  */
 405 void
 406 mlx5_traffic_disable(struct rte_eth_dev *dev)
 407 {
 408         struct mlx5_priv *priv = dev->data->dev_private;
 409
 410         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 411 }
 412
 413 /**
 414  * Restart traffic flows configured by control plane
 415  *
 416  * @param dev
 417  *   Pointer to Ethernet device private data.
 418  *
 419  * @return
 420  *   0 on success, a negative errno value otherwise and rte_errno is set.
 421  */
 422 int
 423 mlx5_traffic_restart(struct rte_eth_dev *dev)
 424 {
 425         if (dev->data->dev_started) {
 426                 mlx5_traffic_disable(dev);
 427                 return mlx5_traffic_enable(dev);
 428         }
 429         return 0;
 430 }