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         ret = mlx5_tx_uar_remap(dev, priv->sh->ctx->cmd_fd);
  62         if (ret) {
  63                 /* Adjust index for rollback. */
  64                 i = priv->txqs_n - 1;
  65                 goto error;
  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
 109         /* Allocate/reuse/resize mempool for Multi-Packet RQ. */
 110         if (mlx5_mprq_alloc_mp(dev)) {
 111                 /* Should not release Rx queues but return immediately. */
 112                 return -rte_errno;
 113         }
 114         for (i = 0; i != priv->rxqs_n; ++i) {
 115                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 116                 struct rte_mempool *mp;
 117
 118                 if (!rxq_ctrl)
 119                         continue;
 120                 /* Pre-register Rx mempool. */
 121                 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
 122                      rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp;
 123                 DRV_LOG(DEBUG,
 124                         "port %u Rx queue %u registering"
 125                         " mp %s having %u chunks",
 126                         dev->data->port_id, rxq_ctrl->rxq.idx,
 127                         mp->name, mp->nb_mem_chunks);
 128                 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp);
 129                 ret = rxq_alloc_elts(rxq_ctrl);
 130                 if (ret)
 131                         goto error;
 132                 rxq_ctrl->ibv = mlx5_rxq_ibv_new(dev, i);
 133                 if (!rxq_ctrl->ibv)
 134                         goto error;
 135         }
 136         return 0;
 137 error:
 138         ret = rte_errno; /* Save rte_errno before cleanup. */
 139         do {
 140                 mlx5_rxq_release(dev, i);
 141         } while (i-- != 0);
 142         rte_errno = ret; /* Restore rte_errno. */
 143         return -rte_errno;
 144 }
 145
 146 /**
 147  * DPDK callback to start the device.
 148  *
 149  * Simulate device start by attaching all configured flows.
 150  *
 151  * @param dev
 152  *   Pointer to Ethernet device structure.
 153  *
 154  * @return
 155  *   0 on success, a negative errno value otherwise and rte_errno is set.
 156  */
 157 int
 158 mlx5_dev_start(struct rte_eth_dev *dev)
 159 {
 160         struct mlx5_priv *priv = dev->data->dev_private;
 161         int ret;
 162
 163         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 164         ret = mlx5_txq_start(dev);
 165         if (ret) {
 166                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 167                         dev->data->port_id, strerror(rte_errno));
 168                 return -rte_errno;
 169         }
 170         ret = mlx5_rxq_start(dev);
 171         if (ret) {
 172                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 173                         dev->data->port_id, strerror(rte_errno));
 174                 mlx5_txq_stop(dev);
 175                 return -rte_errno;
 176         }
 177         dev->data->dev_started = 1;
 178         ret = mlx5_rx_intr_vec_enable(dev);
 179         if (ret) {
 180                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 181                         dev->data->port_id);
 182                 goto error;
 183         }
 184         mlx5_stats_init(dev);
 185         ret = mlx5_traffic_enable(dev);
 186         if (ret) {
 187                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 188                         dev->data->port_id);
 189                 goto error;
 190         }
 191         ret = mlx5_flow_start(dev, &priv->flows);
 192         if (ret) {
 193                 DRV_LOG(DEBUG, "port %u failed to set flows",
 194                         dev->data->port_id);
 195                 goto error;
 196         }
 197         rte_wmb();
 198         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 199         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 200         /* Enable datapath on secondary process. */
 201         mlx5_mp_req_start_rxtx(dev);
 202         mlx5_dev_interrupt_handler_install(dev);
 203         return 0;
 204 error:
 205         ret = rte_errno; /* Save rte_errno before cleanup. */
 206         /* Rollback. */
 207         dev->data->dev_started = 0;
 208         mlx5_flow_stop(dev, &priv->flows);
 209         mlx5_traffic_disable(dev);
 210         mlx5_txq_stop(dev);
 211         mlx5_rxq_stop(dev);
 212         rte_errno = ret; /* Restore rte_errno. */
 213         return -rte_errno;
 214 }
 215
 216 /**
 217  * DPDK callback to stop the device.
 218  *
 219  * Simulate device stop by detaching all configured flows.
 220  *
 221  * @param dev
 222  *   Pointer to Ethernet device structure.
 223  */
 224 void
 225 mlx5_dev_stop(struct rte_eth_dev *dev)
 226 {
 227         struct mlx5_priv *priv = dev->data->dev_private;
 228
 229         dev->data->dev_started = 0;
 230         /* Prevent crashes when queues are still in use. */
 231         dev->rx_pkt_burst = removed_rx_burst;
 232         dev->tx_pkt_burst = removed_tx_burst;
 233         rte_wmb();
 234         /* Disable datapath on secondary process. */
 235         mlx5_mp_req_stop_rxtx(dev);
 236         usleep(1000 * priv->rxqs_n);
 237         DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id);
 238         mlx5_flow_stop(dev, &priv->flows);
 239         mlx5_traffic_disable(dev);
 240         mlx5_rx_intr_vec_disable(dev);
 241         mlx5_dev_interrupt_handler_uninstall(dev);
 242         mlx5_txq_stop(dev);
 243         mlx5_rxq_stop(dev);
 244 }
 245
 246 /**
 247  * Enable traffic flows configured by control plane
 248  *
 249  * @param dev
 250  *   Pointer to Ethernet device private data.
 251  * @param dev
 252  *   Pointer to Ethernet device structure.
 253  *
 254  * @return
 255  *   0 on success, a negative errno value otherwise and rte_errno is set.
 256  */
 257 int
 258 mlx5_traffic_enable(struct rte_eth_dev *dev)
 259 {
 260         struct mlx5_priv *priv = dev->data->dev_private;
 261         struct rte_flow_item_eth bcast = {
 262                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 263         };
 264         struct rte_flow_item_eth ipv6_multi_spec = {
 265                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 266         };
 267         struct rte_flow_item_eth ipv6_multi_mask = {
 268                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 269         };
 270         struct rte_flow_item_eth unicast = {
 271                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 272         };
 273         struct rte_flow_item_eth unicast_mask = {
 274                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 275         };
 276         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 277         const struct ether_addr cmp = {
 278                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 279         };
 280         unsigned int i;
 281         unsigned int j;
 282         int ret;
 283
 284         if (priv->isolated)
 285                 return 0;
 286         if (dev->data->promiscuous) {
 287                 struct rte_flow_item_eth promisc = {
 288                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 289                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 290                         .type = 0,
 291                 };
 292
 293                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 294                 if (ret)
 295                         goto error;
 296         }
 297         if (dev->data->all_multicast) {
 298                 struct rte_flow_item_eth multicast = {
 299                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 300                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 301                         .type = 0,
 302                 };
 303
 304                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 305                 if (ret)
 306                         goto error;
 307         } else {
 308                 /* Add broadcast/multicast flows. */
 309                 for (i = 0; i != vlan_filter_n; ++i) {
 310                         uint16_t vlan = priv->vlan_filter[i];
 311
 312                         struct rte_flow_item_vlan vlan_spec = {
 313                                 .tci = rte_cpu_to_be_16(vlan),
 314                         };
 315                         struct rte_flow_item_vlan vlan_mask =
 316                                 rte_flow_item_vlan_mask;
 317
 318                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 319                                                   &vlan_spec, &vlan_mask);
 320                         if (ret)
 321                                 goto error;
 322                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 323                                                   &ipv6_multi_mask,
 324                                                   &vlan_spec, &vlan_mask);
 325                         if (ret)
 326                                 goto error;
 327                 }
 328                 if (!vlan_filter_n) {
 329                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 330                         if (ret)
 331                                 goto error;
 332                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 333                                              &ipv6_multi_mask);
 334                         if (ret)
 335                                 goto error;
 336                 }
 337         }
 338         /* Add MAC address flows. */
 339         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 340                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 341
 342                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 343                         continue;
 344                 memcpy(&unicast.dst.addr_bytes,
 345                        mac->addr_bytes,
 346                        ETHER_ADDR_LEN);
 347                 for (j = 0; j != vlan_filter_n; ++j) {
 348                         uint16_t vlan = priv->vlan_filter[j];
 349
 350                         struct rte_flow_item_vlan vlan_spec = {
 351                                 .tci = rte_cpu_to_be_16(vlan),
 352                         };
 353                         struct rte_flow_item_vlan vlan_mask =
 354                                 rte_flow_item_vlan_mask;
 355
 356                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 357                                                   &unicast_mask,
 358                                                   &vlan_spec,
 359                                                   &vlan_mask);
 360                         if (ret)
 361                                 goto error;
 362                 }
 363                 if (!vlan_filter_n) {
 364                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 365                         if (ret)
 366                                 goto error;
 367                 }
 368         }
 369         return 0;
 370 error:
 371         ret = rte_errno; /* Save rte_errno before cleanup. */
 372         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 373         rte_errno = ret; /* Restore rte_errno. */
 374         return -rte_errno;
 375 }
 376
 377
 378 /**
 379  * Disable traffic flows configured by control plane
 380  *
 381  * @param dev
 382  *   Pointer to Ethernet device private data.
 383  */
 384 void
 385 mlx5_traffic_disable(struct rte_eth_dev *dev)
 386 {
 387         struct mlx5_priv *priv = dev->data->dev_private;
 388
 389         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 390 }
 391
 392 /**
 393  * Restart traffic flows configured by control plane
 394  *
 395  * @param dev
 396  *   Pointer to Ethernet device private data.
 397  *
 398  * @return
 399  *   0 on success, a negative errno value otherwise and rte_errno is set.
 400  */
 401 int
 402 mlx5_traffic_restart(struct rte_eth_dev *dev)
 403 {
 404         if (dev->data->dev_started) {
 405                 mlx5_traffic_disable(dev);
 406                 return mlx5_traffic_enable(dev);
 407         }
 408         return 0;
 409 }