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 mlx5_txq_stop(struct rte_eth_dev *dev)
  25 {
  26         struct 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 priv *priv = dev->data->dev_private;
  46         unsigned int i;
  47         int ret;
  48
  49         /* Add memory regions to Tx queues. */
  50         for (i = 0; i != priv->txqs_n; ++i) {
  51                 unsigned int idx = 0;
  52                 struct mlx5_mr *mr;
  53                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i);
  54
  55                 if (!txq_ctrl)
  56                         continue;
  57                 LIST_FOREACH(mr, &priv->mr, next) {
  58                         mlx5_txq_mp2mr_reg(&txq_ctrl->txq, mr->mp, idx++);
  59                         if (idx == MLX5_PMD_TX_MP_CACHE)
  60                                 break;
  61                 }
  62                 txq_alloc_elts(txq_ctrl);
  63                 txq_ctrl->ibv = mlx5_txq_ibv_new(dev, i);
  64                 if (!txq_ctrl->ibv) {
  65                         rte_errno = ENOMEM;
  66                         goto error;
  67                 }
  68         }
  69         ret = mlx5_tx_uar_remap(dev, priv->ctx->cmd_fd);
  70         if (ret)
  71                 goto error;
  72         return 0;
  73 error:
  74         ret = rte_errno; /* Save rte_errno before cleanup. */
  75         mlx5_txq_stop(dev);
  76         rte_errno = ret; /* Restore rte_errno. */
  77         return -rte_errno;
  78 }
  79
  80 /**
  81  * Stop traffic on Rx queues.
  82  *
  83  * @param dev
  84  *   Pointer to Ethernet device structure.
  85  */
  86 static void
  87 mlx5_rxq_stop(struct rte_eth_dev *dev)
  88 {
  89         struct priv *priv = dev->data->dev_private;
  90         unsigned int i;
  91
  92         for (i = 0; i != priv->rxqs_n; ++i)
  93                 mlx5_rxq_release(dev, i);
  94 }
  95
  96 /**
  97  * Start traffic on Rx queues.
  98  *
  99  * @param dev
 100  *   Pointer to Ethernet device structure.
 101  *
 102  * @return
 103  *   0 on success, a negative errno value otherwise and rte_errno is set.
 104  */
 105 static int
 106 mlx5_rxq_start(struct rte_eth_dev *dev)
 107 {
 108         struct priv *priv = dev->data->dev_private;
 109         unsigned int i;
 110         int ret = 0;
 111
 112         for (i = 0; i != priv->rxqs_n; ++i) {
 113                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 114
 115                 if (!rxq_ctrl)
 116                         continue;
 117                 ret = rxq_alloc_elts(rxq_ctrl);
 118                 if (ret)
 119                         goto error;
 120                 rxq_ctrl->ibv = mlx5_rxq_ibv_new(dev, i);
 121                 if (!rxq_ctrl->ibv)
 122                         goto error;
 123         }
 124         return 0;
 125 error:
 126         ret = rte_errno; /* Save rte_errno before cleanup. */
 127         mlx5_rxq_stop(dev);
 128         rte_errno = ret; /* Restore rte_errno. */
 129         return -rte_errno;
 130 }
 131
 132 /**
 133  * DPDK callback to start the device.
 134  *
 135  * Simulate device start by attaching all configured flows.
 136  *
 137  * @param dev
 138  *   Pointer to Ethernet device structure.
 139  *
 140  * @return
 141  *   0 on success, a negative errno value otherwise and rte_errno is set.
 142  */
 143 int
 144 mlx5_dev_start(struct rte_eth_dev *dev)
 145 {
 146         struct priv *priv = dev->data->dev_private;
 147         struct mlx5_mr *mr = NULL;
 148         int ret;
 149
 150         dev->data->dev_started = 1;
 151         ret = mlx5_flow_create_drop_queue(dev);
 152         if (ret) {
 153                 ERROR("%p: Drop queue allocation failed: %s",
 154                       (void *)dev, strerror(rte_errno));
 155                 goto error;
 156         }
 157         DEBUG("%p: allocating and configuring hash RX queues", (void *)dev);
 158         rte_mempool_walk(mlx5_mp2mr_iter, priv);
 159         ret = mlx5_txq_start(dev);
 160         if (ret) {
 161                 ERROR("%p: Tx Queue allocation failed: %s",
 162                       (void *)dev, strerror(rte_errno));
 163                 goto error;
 164         }
 165         ret = mlx5_rxq_start(dev);
 166         if (ret) {
 167                 ERROR("%p: Rx Queue allocation failed: %s",
 168                       (void *)dev, strerror(rte_errno));
 169                 goto error;
 170         }
 171         ret = mlx5_rx_intr_vec_enable(dev);
 172         if (ret) {
 173                 ERROR("%p: Rx interrupt vector creation failed",
 174                       (void *)dev);
 175                 goto error;
 176         }
 177         mlx5_xstats_init(dev);
 178         /* Update link status and Tx/Rx callbacks for the first time. */
 179         memset(&dev->data->dev_link, 0, sizeof(struct rte_eth_link));
 180         INFO("Forcing port %u link to be up", dev->data->port_id);
 181         ret = mlx5_force_link_status_change(dev, ETH_LINK_UP);
 182         if (ret) {
 183                 DEBUG("Failed to set port %u link to be up",
 184                       dev->data->port_id);
 185                 goto error;
 186         }
 187         mlx5_dev_interrupt_handler_install(dev);
 188         return 0;
 189 error:
 190         ret = rte_errno; /* Save rte_errno before cleanup. */
 191         /* Rollback. */
 192         dev->data->dev_started = 0;
 193         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 194                 mlx5_mr_release(mr);
 195         mlx5_flow_stop(dev, &priv->flows);
 196         mlx5_traffic_disable(dev);
 197         mlx5_txq_stop(dev);
 198         mlx5_rxq_stop(dev);
 199         mlx5_flow_delete_drop_queue(dev);
 200         rte_errno = ret; /* Restore rte_errno. */
 201         return -rte_errno;
 202 }
 203
 204 /**
 205  * DPDK callback to stop the device.
 206  *
 207  * Simulate device stop by detaching all configured flows.
 208  *
 209  * @param dev
 210  *   Pointer to Ethernet device structure.
 211  */
 212 void
 213 mlx5_dev_stop(struct rte_eth_dev *dev)
 214 {
 215         struct priv *priv = dev->data->dev_private;
 216         struct mlx5_mr *mr;
 217
 218         dev->data->dev_started = 0;
 219         /* Prevent crashes when queues are still in use. */
 220         dev->rx_pkt_burst = removed_rx_burst;
 221         dev->tx_pkt_burst = removed_tx_burst;
 222         rte_wmb();
 223         usleep(1000 * priv->rxqs_n);
 224         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 225         mlx5_flow_stop(dev, &priv->flows);
 226         mlx5_traffic_disable(dev);
 227         mlx5_rx_intr_vec_disable(dev);
 228         mlx5_dev_interrupt_handler_uninstall(dev);
 229         mlx5_txq_stop(dev);
 230         mlx5_rxq_stop(dev);
 231         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 232                 mlx5_mr_release(mr);
 233         mlx5_flow_delete_drop_queue(dev);
 234 }
 235
 236 /**
 237  * Enable traffic flows configured by control plane
 238  *
 239  * @param dev
 240  *   Pointer to Ethernet device private data.
 241  * @param dev
 242  *   Pointer to Ethernet device structure.
 243  *
 244  * @return
 245  *   0 on success, a negative errno value otherwise and rte_errno is set.
 246  */
 247 int
 248 mlx5_traffic_enable(struct rte_eth_dev *dev)
 249 {
 250         struct priv *priv = dev->data->dev_private;
 251         struct rte_flow_item_eth bcast = {
 252                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 253         };
 254         struct rte_flow_item_eth ipv6_multi_spec = {
 255                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 256         };
 257         struct rte_flow_item_eth ipv6_multi_mask = {
 258                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 259         };
 260         struct rte_flow_item_eth unicast = {
 261                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 262         };
 263         struct rte_flow_item_eth unicast_mask = {
 264                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 265         };
 266         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 267         const struct ether_addr cmp = {
 268                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 269         };
 270         unsigned int i;
 271         unsigned int j;
 272         int ret;
 273
 274         if (priv->isolated)
 275                 return 0;
 276         if (dev->data->promiscuous) {
 277                 struct rte_flow_item_eth promisc = {
 278                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 279                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 280                         .type = 0,
 281                 };
 282
 283                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 284                 if (ret)
 285                         goto error;
 286         }
 287         if (dev->data->all_multicast) {
 288                 struct rte_flow_item_eth multicast = {
 289                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 290                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 291                         .type = 0,
 292                 };
 293
 294                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 295                 if (ret)
 296                         goto error;
 297         } else {
 298                 /* Add broadcast/multicast flows. */
 299                 for (i = 0; i != vlan_filter_n; ++i) {
 300                         uint16_t vlan = priv->vlan_filter[i];
 301
 302                         struct rte_flow_item_vlan vlan_spec = {
 303                                 .tci = rte_cpu_to_be_16(vlan),
 304                         };
 305                         struct rte_flow_item_vlan vlan_mask = {
 306                                 .tci = 0xffff,
 307                         };
 308
 309                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 310                                                   &vlan_spec, &vlan_mask);
 311                         if (ret)
 312                                 goto error;
 313                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 314                                                   &ipv6_multi_mask,
 315                                                   &vlan_spec, &vlan_mask);
 316                         if (ret)
 317                                 goto error;
 318                 }
 319                 if (!vlan_filter_n) {
 320                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 321                         if (ret)
 322                                 goto error;
 323                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 324                                              &ipv6_multi_mask);
 325                         if (ret)
 326                                 goto error;
 327                 }
 328         }
 329         /* Add MAC address flows. */
 330         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 331                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 332
 333                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 334                         continue;
 335                 memcpy(&unicast.dst.addr_bytes,
 336                        mac->addr_bytes,
 337                        ETHER_ADDR_LEN);
 338                 for (j = 0; j != vlan_filter_n; ++j) {
 339                         uint16_t vlan = priv->vlan_filter[j];
 340
 341                         struct rte_flow_item_vlan vlan_spec = {
 342                                 .tci = rte_cpu_to_be_16(vlan),
 343                         };
 344                         struct rte_flow_item_vlan vlan_mask = {
 345                                 .tci = 0xffff,
 346                         };
 347
 348                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 349                                                   &unicast_mask,
 350                                                   &vlan_spec,
 351                                                   &vlan_mask);
 352                         if (ret)
 353                                 goto error;
 354                 }
 355                 if (!vlan_filter_n) {
 356                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 357                         if (ret)
 358                                 goto error;
 359                 }
 360         }
 361         return 0;
 362 error:
 363         ret = rte_errno; /* Save rte_errno before cleanup. */
 364         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 365         rte_errno = ret; /* Restore rte_errno. */
 366         return -rte_errno;
 367 }
 368
 369
 370 /**
 371  * Disable traffic flows configured by control plane
 372  *
 373  * @param dev
 374  *   Pointer to Ethernet device private data.
 375  */
 376 void
 377 mlx5_traffic_disable(struct rte_eth_dev *dev)
 378 {
 379         struct priv *priv = dev->data->dev_private;
 380
 381         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 382 }
 383
 384 /**
 385  * Restart traffic flows configured by control plane
 386  *
 387  * @param dev
 388  *   Pointer to Ethernet device private data.
 389  *
 390  * @return
 391  *   0 on success, a negative errno value otherwise and rte_errno is set.
 392  */
 393 int
 394 mlx5_traffic_restart(struct rte_eth_dev *dev)
 395 {
 396         if (dev->data->dev_started) {
 397                 mlx5_traffic_disable(dev);
 398                 return mlx5_traffic_enable(dev);
 399         }
 400         return 0;
 401 }