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