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                 txq_alloc_elts(txq_ctrl);
  55                 txq_ctrl->ibv = mlx5_txq_ibv_new(dev, i);
  56                 if (!txq_ctrl->ibv) {
  57                         rte_errno = ENOMEM;
  58                         goto error;
  59                 }
  60         }
  61         return 0;
  62 error:
  63         ret = rte_errno; /* Save rte_errno before cleanup. */
  64         do {
  65                 mlx5_txq_release(dev, i);
  66         } while (i-- != 0);
  67         rte_errno = ret; /* Restore rte_errno. */
  68         return -rte_errno;
  69 }
  70
  71 /**
  72  * Stop traffic on Rx queues.
  73  *
  74  * @param dev
  75  *   Pointer to Ethernet device structure.
  76  */
  77 static void
  78 mlx5_rxq_stop(struct rte_eth_dev *dev)
  79 {
  80         struct mlx5_priv *priv = dev->data->dev_private;
  81         unsigned int i;
  82
  83         for (i = 0; i != priv->rxqs_n; ++i)
  84                 mlx5_rxq_release(dev, i);
  85 }
  86
  87 /**
  88  * Start traffic on Rx queues.
  89  *
  90  * @param dev
  91  *   Pointer to Ethernet device structure.
  92  *
  93  * @return
  94  *   0 on success, a negative errno value otherwise and rte_errno is set.
  95  */
  96 static int
  97 mlx5_rxq_start(struct rte_eth_dev *dev)
  98 {
  99         struct mlx5_priv *priv = dev->data->dev_private;
 100         unsigned int i;
 101         int ret = 0;
 102         enum mlx5_rxq_obj_type obj_type = MLX5_RXQ_OBJ_TYPE_IBV;
 103
 104         for (i = 0; i < priv->rxqs_n; ++i) {
 105                 if ((*priv->rxqs)[i]->lro) {
 106                         obj_type =  MLX5_RXQ_OBJ_TYPE_DEVX_RQ;
 107                         break;
 108                 }
 109         }
 110         /* Allocate/reuse/resize mempool for Multi-Packet RQ. */
 111         if (mlx5_mprq_alloc_mp(dev)) {
 112                 /* Should not release Rx queues but return immediately. */
 113                 return -rte_errno;
 114         }
 115         for (i = 0; i != priv->rxqs_n; ++i) {
 116                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 117                 struct rte_mempool *mp;
 118
 119                 if (!rxq_ctrl)
 120                         continue;
 121                 if (rxq_ctrl->type == MLX5_RXQ_TYPE_HAIRPIN) {
 122                         rxq_ctrl->obj = mlx5_rxq_obj_new
 123                                 (dev, i, MLX5_RXQ_OBJ_TYPE_DEVX_HAIRPIN);
 124                         if (!rxq_ctrl->obj)
 125                                 goto error;
 126                         continue;
 127                 }
 128                 /* Pre-register Rx mempool. */
 129                 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
 130                      rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp;
 131                 DRV_LOG(DEBUG,
 132                         "port %u Rx queue %u registering"
 133                         " mp %s having %u chunks",
 134                         dev->data->port_id, rxq_ctrl->rxq.idx,
 135                         mp->name, mp->nb_mem_chunks);
 136                 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp);
 137                 ret = rxq_alloc_elts(rxq_ctrl);
 138                 if (ret)
 139                         goto error;
 140                 rxq_ctrl->obj = mlx5_rxq_obj_new(dev, i, obj_type);
 141                 if (!rxq_ctrl->obj)
 142                         goto error;
 143                 if (obj_type == MLX5_RXQ_OBJ_TYPE_IBV)
 144                         rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num;
 145                 else if (obj_type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ)
 146                         rxq_ctrl->wqn = rxq_ctrl->obj->rq->id;
 147         }
 148         return 0;
 149 error:
 150         ret = rte_errno; /* Save rte_errno before cleanup. */
 151         do {
 152                 mlx5_rxq_release(dev, i);
 153         } while (i-- != 0);
 154         rte_errno = ret; /* Restore rte_errno. */
 155         return -rte_errno;
 156 }
 157
 158 /**
 159  * DPDK callback to start the device.
 160  *
 161  * Simulate device start by attaching all configured flows.
 162  *
 163  * @param dev
 164  *   Pointer to Ethernet device structure.
 165  *
 166  * @return
 167  *   0 on success, a negative errno value otherwise and rte_errno is set.
 168  */
 169 int
 170 mlx5_dev_start(struct rte_eth_dev *dev)
 171 {
 172         struct mlx5_priv *priv = dev->data->dev_private;
 173         int ret;
 174
 175         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 176         ret = mlx5_txq_start(dev);
 177         if (ret) {
 178                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 179                         dev->data->port_id, strerror(rte_errno));
 180                 return -rte_errno;
 181         }
 182         ret = mlx5_rxq_start(dev);
 183         if (ret) {
 184                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 185                         dev->data->port_id, strerror(rte_errno));
 186                 mlx5_txq_stop(dev);
 187                 return -rte_errno;
 188         }
 189         dev->data->dev_started = 1;
 190         ret = mlx5_rx_intr_vec_enable(dev);
 191         if (ret) {
 192                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 193                         dev->data->port_id);
 194                 goto error;
 195         }
 196         mlx5_stats_init(dev);
 197         ret = mlx5_traffic_enable(dev);
 198         if (ret) {
 199                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 200                         dev->data->port_id);
 201                 goto error;
 202         }
 203         ret = mlx5_flow_start(dev, &priv->flows);
 204         if (ret) {
 205                 DRV_LOG(DEBUG, "port %u failed to set flows",
 206                         dev->data->port_id);
 207                 goto error;
 208         }
 209         rte_wmb();
 210         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 211         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 212         /* Enable datapath on secondary process. */
 213         mlx5_mp_req_start_rxtx(dev);
 214         mlx5_dev_interrupt_handler_install(dev);
 215         return 0;
 216 error:
 217         ret = rte_errno; /* Save rte_errno before cleanup. */
 218         /* Rollback. */
 219         dev->data->dev_started = 0;
 220         mlx5_flow_stop(dev, &priv->flows);
 221         mlx5_traffic_disable(dev);
 222         mlx5_txq_stop(dev);
 223         mlx5_rxq_stop(dev);
 224         rte_errno = ret; /* Restore rte_errno. */
 225         return -rte_errno;
 226 }
 227
 228 /**
 229  * DPDK callback to stop the device.
 230  *
 231  * Simulate device stop by detaching all configured flows.
 232  *
 233  * @param dev
 234  *   Pointer to Ethernet device structure.
 235  */
 236 void
 237 mlx5_dev_stop(struct rte_eth_dev *dev)
 238 {
 239         struct mlx5_priv *priv = dev->data->dev_private;
 240
 241         dev->data->dev_started = 0;
 242         /* Prevent crashes when queues are still in use. */
 243         dev->rx_pkt_burst = removed_rx_burst;
 244         dev->tx_pkt_burst = removed_tx_burst;
 245         rte_wmb();
 246         /* Disable datapath on secondary process. */
 247         mlx5_mp_req_stop_rxtx(dev);
 248         usleep(1000 * priv->rxqs_n);
 249         DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id);
 250         mlx5_flow_stop(dev, &priv->flows);
 251         mlx5_traffic_disable(dev);
 252         mlx5_rx_intr_vec_disable(dev);
 253         mlx5_dev_interrupt_handler_uninstall(dev);
 254         mlx5_txq_stop(dev);
 255         mlx5_rxq_stop(dev);
 256 }
 257
 258 /**
 259  * Enable traffic flows configured by control plane
 260  *
 261  * @param dev
 262  *   Pointer to Ethernet device private data.
 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_traffic_enable(struct rte_eth_dev *dev)
 271 {
 272         struct mlx5_priv *priv = dev->data->dev_private;
 273         struct rte_flow_item_eth bcast = {
 274                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 275         };
 276         struct rte_flow_item_eth ipv6_multi_spec = {
 277                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 278         };
 279         struct rte_flow_item_eth ipv6_multi_mask = {
 280                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 281         };
 282         struct rte_flow_item_eth unicast = {
 283                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 284         };
 285         struct rte_flow_item_eth unicast_mask = {
 286                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 287         };
 288         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 289         const struct rte_ether_addr cmp = {
 290                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 291         };
 292         unsigned int i;
 293         unsigned int j;
 294         int ret;
 295
 296         if (priv->config.dv_esw_en && !priv->config.vf)
 297                 if (!mlx5_flow_create_esw_table_zero_flow(dev))
 298                         goto error;
 299         if (priv->isolated)
 300                 return 0;
 301         if (dev->data->promiscuous) {
 302                 struct rte_flow_item_eth promisc = {
 303                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 304                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 305                         .type = 0,
 306                 };
 307
 308                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 309                 if (ret)
 310                         goto error;
 311         }
 312         if (dev->data->all_multicast) {
 313                 struct rte_flow_item_eth multicast = {
 314                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 315                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 316                         .type = 0,
 317                 };
 318
 319                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 320                 if (ret)
 321                         goto error;
 322         } else {
 323                 /* Add broadcast/multicast flows. */
 324                 for (i = 0; i != vlan_filter_n; ++i) {
 325                         uint16_t vlan = priv->vlan_filter[i];
 326
 327                         struct rte_flow_item_vlan vlan_spec = {
 328                                 .tci = rte_cpu_to_be_16(vlan),
 329                         };
 330                         struct rte_flow_item_vlan vlan_mask =
 331                                 rte_flow_item_vlan_mask;
 332
 333                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 334                                                   &vlan_spec, &vlan_mask);
 335                         if (ret)
 336                                 goto error;
 337                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 338                                                   &ipv6_multi_mask,
 339                                                   &vlan_spec, &vlan_mask);
 340                         if (ret)
 341                                 goto error;
 342                 }
 343                 if (!vlan_filter_n) {
 344                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 345                         if (ret)
 346                                 goto error;
 347                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 348                                              &ipv6_multi_mask);
 349                         if (ret)
 350                                 goto error;
 351                 }
 352         }
 353         /* Add MAC address flows. */
 354         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 355                 struct rte_ether_addr *mac = &dev->data->mac_addrs[i];
 356
 357                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 358                         continue;
 359                 memcpy(&unicast.dst.addr_bytes,
 360                        mac->addr_bytes,
 361                        RTE_ETHER_ADDR_LEN);
 362                 for (j = 0; j != vlan_filter_n; ++j) {
 363                         uint16_t vlan = priv->vlan_filter[j];
 364
 365                         struct rte_flow_item_vlan vlan_spec = {
 366                                 .tci = rte_cpu_to_be_16(vlan),
 367                         };
 368                         struct rte_flow_item_vlan vlan_mask =
 369                                 rte_flow_item_vlan_mask;
 370
 371                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 372                                                   &unicast_mask,
 373                                                   &vlan_spec,
 374                                                   &vlan_mask);
 375                         if (ret)
 376                                 goto error;
 377                 }
 378                 if (!vlan_filter_n) {
 379                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 380                         if (ret)
 381                                 goto error;
 382                 }
 383         }
 384         return 0;
 385 error:
 386         ret = rte_errno; /* Save rte_errno before cleanup. */
 387         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 388         rte_errno = ret; /* Restore rte_errno. */
 389         return -rte_errno;
 390 }
 391
 392
 393 /**
 394  * Disable traffic flows configured by control plane
 395  *
 396  * @param dev
 397  *   Pointer to Ethernet device private data.
 398  */
 399 void
 400 mlx5_traffic_disable(struct rte_eth_dev *dev)
 401 {
 402         struct mlx5_priv *priv = dev->data->dev_private;
 403
 404         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 405 }
 406
 407 /**
 408  * Restart traffic flows configured by control plane
 409  *
 410  * @param dev
 411  *   Pointer to Ethernet device private data.
 412  *
 413  * @return
 414  *   0 on success, a negative errno value otherwise and rte_errno is set.
 415  */
 416 int
 417 mlx5_traffic_restart(struct rte_eth_dev *dev)
 418 {
 419         if (dev->data->dev_started) {
 420                 mlx5_traffic_disable(dev);
 421                 return mlx5_traffic_enable(dev);
 422         }
 423         return 0;
 424 }