drivers/net/mlx5/mlx5_trigger.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2015 Mellanox.
   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 priv_txq_stop(struct priv *priv)
  25 {
  26         unsigned int i;
  27
  28         for (i = 0; i != priv->txqs_n; ++i)
  29                 mlx5_priv_txq_release(priv, i);
  30 }
  31
  32 /**
  33  * Start traffic on Tx queues.
  34  *
  35  * @param dev
  36  *   Pointer to Ethernet device structure.
  37  *
  38  * @return
  39  *   0 on success, errno on error.
  40  */
  41 static int
  42 priv_txq_start(struct priv *priv)
  43 {
  44         unsigned int i;
  45         int ret = 0;
  46
  47         /* Add memory regions to Tx queues. */
  48         for (i = 0; i != priv->txqs_n; ++i) {
  49                 unsigned int idx = 0;
  50                 struct mlx5_mr *mr;
  51                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_priv_txq_get(priv, i);
  52
  53                 if (!txq_ctrl)
  54                         continue;
  55                 LIST_FOREACH(mr, &priv->mr, next) {
  56                         priv_txq_mp2mr_reg(priv, &txq_ctrl->txq, mr->mp, idx++);
  57                         if (idx == MLX5_PMD_TX_MP_CACHE)
  58                                 break;
  59                 }
  60                 txq_alloc_elts(txq_ctrl);
  61                 txq_ctrl->ibv = mlx5_priv_txq_ibv_new(priv, i);
  62                 if (!txq_ctrl->ibv) {
  63                         ret = ENOMEM;
  64                         goto error;
  65                 }
  66         }
  67         ret = priv_tx_uar_remap(priv, priv->ctx->cmd_fd);
  68         if (ret)
  69                 goto error;
  70         return ret;
  71 error:
  72         priv_txq_stop(priv);
  73         return ret;
  74 }
  75
  76 /**
  77  * Stop traffic on Rx queues.
  78  *
  79  * @param dev
  80  *   Pointer to Ethernet device structure.
  81  */
  82 static void
  83 priv_rxq_stop(struct priv *priv)
  84 {
  85         unsigned int i;
  86
  87         for (i = 0; i != priv->rxqs_n; ++i)
  88                 mlx5_priv_rxq_release(priv, i);
  89 }
  90
  91 /**
  92  * Start traffic on Rx queues.
  93  *
  94  * @param dev
  95  *   Pointer to Ethernet device structure.
  96  *
  97  * @return
  98  *   0 on success, errno on error.
  99  */
 100 static int
 101 priv_rxq_start(struct priv *priv)
 102 {
 103         unsigned int i;
 104         int ret = 0;
 105
 106         for (i = 0; i != priv->rxqs_n; ++i) {
 107                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_priv_rxq_get(priv, i);
 108
 109                 if (!rxq_ctrl)
 110                         continue;
 111                 ret = rxq_alloc_elts(rxq_ctrl);
 112                 if (ret)
 113                         goto error;
 114                 rxq_ctrl->ibv = mlx5_priv_rxq_ibv_new(priv, i);
 115                 if (!rxq_ctrl->ibv) {
 116                         ret = ENOMEM;
 117                         goto error;
 118                 }
 119         }
 120         return -ret;
 121 error:
 122         priv_rxq_stop(priv);
 123         return -ret;
 124 }
 125
 126 /**
 127  * DPDK callback to start the device.
 128  *
 129  * Simulate device start by attaching all configured flows.
 130  *
 131  * @param dev
 132  *   Pointer to Ethernet device structure.
 133  *
 134  * @return
 135  *   0 on success, negative errno value on failure.
 136  */
 137 int
 138 mlx5_dev_start(struct rte_eth_dev *dev)
 139 {
 140         struct priv *priv = dev->data->dev_private;
 141         struct mlx5_mr *mr = NULL;
 142         int err;
 143
 144         dev->data->dev_started = 1;
 145         err = priv_flow_create_drop_queue(priv);
 146         if (err) {
 147                 ERROR("%p: Drop queue allocation failed: %s",
 148                       (void *)dev, strerror(err));
 149                 goto error;
 150         }
 151         DEBUG("%p: allocating and configuring hash RX queues", (void *)dev);
 152         rte_mempool_walk(mlx5_mp2mr_iter, priv);
 153         err = priv_txq_start(priv);
 154         if (err) {
 155                 ERROR("%p: TXQ allocation failed: %s",
 156                       (void *)dev, strerror(err));
 157                 goto error;
 158         }
 159         err = priv_rxq_start(priv);
 160         if (err) {
 161                 ERROR("%p: RXQ allocation failed: %s",
 162                       (void *)dev, strerror(err));
 163                 goto error;
 164         }
 165         err = priv_rx_intr_vec_enable(priv);
 166         if (err) {
 167                 ERROR("%p: RX interrupt vector creation failed",
 168                       (void *)priv);
 169                 goto error;
 170         }
 171         priv_xstats_init(priv);
 172         /* Update link status and Tx/Rx callbacks for the first time. */
 173         memset(&dev->data->dev_link, 0, sizeof(struct rte_eth_link));
 174         INFO("Forcing port %u link to be up", dev->data->port_id);
 175         err = priv_force_link_status_change(priv, ETH_LINK_UP);
 176         if (err) {
 177                 DEBUG("Failed to set port %u link to be up",
 178                       dev->data->port_id);
 179                 goto error;
 180         }
 181         priv_dev_interrupt_handler_install(priv, dev);
 182         return 0;
 183 error:
 184         /* Rollback. */
 185         dev->data->dev_started = 0;
 186         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 187                 priv_mr_release(priv, mr);
 188         priv_flow_stop(priv, &priv->flows);
 189         priv_dev_traffic_disable(priv, dev);
 190         priv_txq_stop(priv);
 191         priv_rxq_stop(priv);
 192         priv_flow_delete_drop_queue(priv);
 193         return err;
 194 }
 195
 196 /**
 197  * DPDK callback to stop the device.
 198  *
 199  * Simulate device stop by detaching all configured flows.
 200  *
 201  * @param dev
 202  *   Pointer to Ethernet device structure.
 203  */
 204 void
 205 mlx5_dev_stop(struct rte_eth_dev *dev)
 206 {
 207         struct priv *priv = dev->data->dev_private;
 208         struct mlx5_mr *mr;
 209
 210         dev->data->dev_started = 0;
 211         /* Prevent crashes when queues are still in use. */
 212         dev->rx_pkt_burst = removed_rx_burst;
 213         dev->tx_pkt_burst = removed_tx_burst;
 214         rte_wmb();
 215         usleep(1000 * priv->rxqs_n);
 216         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 217         priv_flow_stop(priv, &priv->flows);
 218         priv_dev_traffic_disable(priv, dev);
 219         priv_rx_intr_vec_disable(priv);
 220         priv_dev_interrupt_handler_uninstall(priv, dev);
 221         priv_txq_stop(priv);
 222         priv_rxq_stop(priv);
 223         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 224                 priv_mr_release(priv, mr);
 225         priv_flow_delete_drop_queue(priv);
 226 }
 227
 228 /**
 229  * Enable traffic flows configured by control plane
 230  *
 231  * @param priv
 232  *   Pointer to Ethernet device private data.
 233  * @param dev
 234  *   Pointer to Ethernet device structure.
 235  *
 236  * @return
 237  *   0 on success.
 238  */
 239 int
 240 priv_dev_traffic_enable(struct priv *priv, struct rte_eth_dev *dev)
 241 {
 242         struct rte_flow_item_eth bcast = {
 243                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 244         };
 245         struct rte_flow_item_eth ipv6_multi_spec = {
 246                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 247         };
 248         struct rte_flow_item_eth ipv6_multi_mask = {
 249                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 250         };
 251         struct rte_flow_item_eth unicast = {
 252                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 253         };
 254         struct rte_flow_item_eth unicast_mask = {
 255                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 256         };
 257         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 258         const struct ether_addr cmp = {
 259                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 260         };
 261         unsigned int i;
 262         unsigned int j;
 263         int ret;
 264
 265         if (priv->isolated)
 266                 return 0;
 267         if (dev->data->promiscuous) {
 268                 struct rte_flow_item_eth promisc = {
 269                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 270                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 271                         .type = 0,
 272                 };
 273
 274                 claim_zero(mlx5_ctrl_flow(dev, &promisc, &promisc));
 275                 return 0;
 276         }
 277         if (dev->data->all_multicast) {
 278                 struct rte_flow_item_eth multicast = {
 279                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 280                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 281                         .type = 0,
 282                 };
 283
 284                 claim_zero(mlx5_ctrl_flow(dev, &multicast, &multicast));
 285         } else {
 286                 /* Add broadcast/multicast flows. */
 287                 for (i = 0; i != vlan_filter_n; ++i) {
 288                         uint16_t vlan = priv->vlan_filter[i];
 289
 290                         struct rte_flow_item_vlan vlan_spec = {
 291                                 .tci = rte_cpu_to_be_16(vlan),
 292                         };
 293                         struct rte_flow_item_vlan vlan_mask = {
 294                                 .tci = 0xffff,
 295                         };
 296
 297                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 298                                                   &vlan_spec, &vlan_mask);
 299                         if (ret)
 300                                 goto error;
 301                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 302                                                   &ipv6_multi_mask,
 303                                                   &vlan_spec, &vlan_mask);
 304                         if (ret)
 305                                 goto error;
 306                 }
 307                 if (!vlan_filter_n) {
 308                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 309                         if (ret)
 310                                 goto error;
 311                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 312                                              &ipv6_multi_mask);
 313                         if (ret)
 314                                 goto error;
 315                 }
 316         }
 317         /* Add MAC address flows. */
 318         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 319                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 320
 321                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 322                         continue;
 323                 memcpy(&unicast.dst.addr_bytes,
 324                        mac->addr_bytes,
 325                        ETHER_ADDR_LEN);
 326                 for (j = 0; j != vlan_filter_n; ++j) {
 327                         uint16_t vlan = priv->vlan_filter[j];
 328
 329                         struct rte_flow_item_vlan vlan_spec = {
 330                                 .tci = rte_cpu_to_be_16(vlan),
 331                         };
 332                         struct rte_flow_item_vlan vlan_mask = {
 333                                 .tci = 0xffff,
 334                         };
 335
 336                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 337                                                   &unicast_mask,
 338                                                   &vlan_spec,
 339                                                   &vlan_mask);
 340                         if (ret)
 341                                 goto error;
 342                 }
 343                 if (!vlan_filter_n) {
 344                         ret = mlx5_ctrl_flow(dev, &unicast,
 345                                              &unicast_mask);
 346                         if (ret)
 347                                 goto error;
 348                 }
 349         }
 350         return 0;
 351 error:
 352         return rte_errno;
 353 }
 354
 355
 356 /**
 357  * Disable traffic flows configured by control plane
 358  *
 359  * @param priv
 360  *   Pointer to Ethernet device private data.
 361  * @param dev
 362  *   Pointer to Ethernet device structure.
 363  *
 364  * @return
 365  *   0 on success.
 366  */
 367 int
 368 priv_dev_traffic_disable(struct priv *priv,
 369                          struct rte_eth_dev *dev __rte_unused)
 370 {
 371         priv_flow_flush(priv, &priv->ctrl_flows);
 372         return 0;
 373 }
 374
 375 /**
 376  * Restart traffic flows configured by control plane
 377  *
 378  * @param priv
 379  *   Pointer to Ethernet device private data.
 380  * @param dev
 381  *   Pointer to Ethernet device structure.
 382  *
 383  * @return
 384  *   0 on success.
 385  */
 386 int
 387 priv_dev_traffic_restart(struct priv *priv, struct rte_eth_dev *dev)
 388 {
 389         if (dev->data->dev_started) {
 390                 priv_dev_traffic_disable(priv, dev);
 391                 priv_dev_traffic_enable(priv, dev);
 392         }
 393         return 0;
 394 }
 395
 396 /**
 397  * Restart traffic flows configured by control plane
 398  *
 399  * @param dev
 400  *   Pointer to Ethernet device structure.
 401  *
 402  * @return
 403  *   0 on success.
 404  */
 405 int
 406 mlx5_traffic_restart(struct rte_eth_dev *dev)
 407 {
 408         struct priv *priv = dev->data->dev_private;
 409
 410         priv_dev_traffic_restart(priv, dev);
 411         return 0;
 412 }