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                 DRV_LOG(ERR, "port %u drop queue allocation failed: %s",
 154                         dev->data->port_id, strerror(rte_errno));
 155                 goto error;
 156         }
 157         DRV_LOG(DEBUG, "port %u allocating and configuring hash Rx queues",
 158                 dev->data->port_id);
 159         rte_mempool_walk(mlx5_mp2mr_iter, priv);
 160         ret = mlx5_txq_start(dev);
 161         if (ret) {
 162                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 163                         dev->data->port_id, strerror(rte_errno));
 164                 goto error;
 165         }
 166         ret = mlx5_rxq_start(dev);
 167         if (ret) {
 168                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 169                         dev->data->port_id, strerror(rte_errno));
 170                 goto error;
 171         }
 172         ret = mlx5_rx_intr_vec_enable(dev);
 173         if (ret) {
 174                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 175                         dev->data->port_id);
 176                 goto error;
 177         }
 178         mlx5_xstats_init(dev);
 179         ret = mlx5_traffic_enable(dev);
 180         if (ret) {
 181                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 182                         dev->data->port_id);
 183                 goto error;
 184         }
 185         ret = mlx5_flow_start(dev, &priv->flows);
 186         if (ret) {
 187                 DRV_LOG(DEBUG, "port %u failed to set flows",
 188                         dev->data->port_id);
 189                 goto error;
 190         }
 191         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 192         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 193         mlx5_dev_interrupt_handler_install(dev);
 194         return 0;
 195 error:
 196         ret = rte_errno; /* Save rte_errno before cleanup. */
 197         /* Rollback. */
 198         dev->data->dev_started = 0;
 199         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 200                 mlx5_mr_release(mr);
 201         mlx5_flow_stop(dev, &priv->flows);
 202         mlx5_traffic_disable(dev);
 203         mlx5_txq_stop(dev);
 204         mlx5_rxq_stop(dev);
 205         mlx5_flow_delete_drop_queue(dev);
 206         rte_errno = ret; /* Restore rte_errno. */
 207         return -rte_errno;
 208 }
 209
 210 /**
 211  * DPDK callback to stop the device.
 212  *
 213  * Simulate device stop by detaching all configured flows.
 214  *
 215  * @param dev
 216  *   Pointer to Ethernet device structure.
 217  */
 218 void
 219 mlx5_dev_stop(struct rte_eth_dev *dev)
 220 {
 221         struct priv *priv = dev->data->dev_private;
 222         struct mlx5_mr *mr;
 223
 224         dev->data->dev_started = 0;
 225         /* Prevent crashes when queues are still in use. */
 226         dev->rx_pkt_burst = removed_rx_burst;
 227         dev->tx_pkt_burst = removed_tx_burst;
 228         rte_wmb();
 229         usleep(1000 * priv->rxqs_n);
 230         DRV_LOG(DEBUG, "port %u cleaning up and destroying hash Rx queues",
 231                 dev->data->port_id);
 232         mlx5_flow_stop(dev, &priv->flows);
 233         mlx5_traffic_disable(dev);
 234         mlx5_rx_intr_vec_disable(dev);
 235         mlx5_dev_interrupt_handler_uninstall(dev);
 236         mlx5_txq_stop(dev);
 237         mlx5_rxq_stop(dev);
 238         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 239                 mlx5_mr_release(mr);
 240         mlx5_flow_delete_drop_queue(dev);
 241 }
 242
 243 /**
 244  * Enable traffic flows configured by control plane
 245  *
 246  * @param dev
 247  *   Pointer to Ethernet device private data.
 248  * @param dev
 249  *   Pointer to Ethernet device structure.
 250  *
 251  * @return
 252  *   0 on success, a negative errno value otherwise and rte_errno is set.
 253  */
 254 int
 255 mlx5_traffic_enable(struct rte_eth_dev *dev)
 256 {
 257         struct priv *priv = dev->data->dev_private;
 258         struct rte_flow_item_eth bcast = {
 259                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 260         };
 261         struct rte_flow_item_eth ipv6_multi_spec = {
 262                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 263         };
 264         struct rte_flow_item_eth ipv6_multi_mask = {
 265                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 266         };
 267         struct rte_flow_item_eth unicast = {
 268                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 269         };
 270         struct rte_flow_item_eth unicast_mask = {
 271                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 272         };
 273         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 274         const struct ether_addr cmp = {
 275                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 276         };
 277         unsigned int i;
 278         unsigned int j;
 279         int ret;
 280
 281         if (priv->isolated)
 282                 return 0;
 283         if (dev->data->promiscuous) {
 284                 struct rte_flow_item_eth promisc = {
 285                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 286                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 287                         .type = 0,
 288                 };
 289
 290                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 291                 if (ret)
 292                         goto error;
 293         }
 294         if (dev->data->all_multicast) {
 295                 struct rte_flow_item_eth multicast = {
 296                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 297                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 298                         .type = 0,
 299                 };
 300
 301                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 302                 if (ret)
 303                         goto error;
 304         } else {
 305                 /* Add broadcast/multicast flows. */
 306                 for (i = 0; i != vlan_filter_n; ++i) {
 307                         uint16_t vlan = priv->vlan_filter[i];
 308
 309                         struct rte_flow_item_vlan vlan_spec = {
 310                                 .tci = rte_cpu_to_be_16(vlan),
 311                         };
 312                         struct rte_flow_item_vlan vlan_mask = {
 313                                 .tci = 0xffff,
 314                         };
 315
 316                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 317                                                   &vlan_spec, &vlan_mask);
 318                         if (ret)
 319                                 goto error;
 320                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 321                                                   &ipv6_multi_mask,
 322                                                   &vlan_spec, &vlan_mask);
 323                         if (ret)
 324                                 goto error;
 325                 }
 326                 if (!vlan_filter_n) {
 327                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 328                         if (ret)
 329                                 goto error;
 330                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 331                                              &ipv6_multi_mask);
 332                         if (ret)
 333                                 goto error;
 334                 }
 335         }
 336         /* Add MAC address flows. */
 337         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 338                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 339
 340                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 341                         continue;
 342                 memcpy(&unicast.dst.addr_bytes,
 343                        mac->addr_bytes,
 344                        ETHER_ADDR_LEN);
 345                 for (j = 0; j != vlan_filter_n; ++j) {
 346                         uint16_t vlan = priv->vlan_filter[j];
 347
 348                         struct rte_flow_item_vlan vlan_spec = {
 349                                 .tci = rte_cpu_to_be_16(vlan),
 350                         };
 351                         struct rte_flow_item_vlan vlan_mask = {
 352                                 .tci = 0xffff,
 353                         };
 354
 355                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 356                                                   &unicast_mask,
 357                                                   &vlan_spec,
 358                                                   &vlan_mask);
 359                         if (ret)
 360                                 goto error;
 361                 }
 362                 if (!vlan_filter_n) {
 363                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 364                         if (ret)
 365                                 goto error;
 366                 }
 367         }
 368         return 0;
 369 error:
 370         ret = rte_errno; /* Save rte_errno before cleanup. */
 371         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 372         rte_errno = ret; /* Restore rte_errno. */
 373         return -rte_errno;
 374 }
 375
 376
 377 /**
 378  * Disable traffic flows configured by control plane
 379  *
 380  * @param dev
 381  *   Pointer to Ethernet device private data.
 382  */
 383 void
 384 mlx5_traffic_disable(struct rte_eth_dev *dev)
 385 {
 386         struct priv *priv = dev->data->dev_private;
 387
 388         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 389 }
 390
 391 /**
 392  * Restart traffic flows configured by control plane
 393  *
 394  * @param dev
 395  *   Pointer to Ethernet device private data.
 396  *
 397  * @return
 398  *   0 on success, a negative errno value otherwise and rte_errno is set.
 399  */
 400 int
 401 mlx5_traffic_restart(struct rte_eth_dev *dev)
 402 {
 403         if (dev->data->dev_started) {
 404                 mlx5_traffic_disable(dev);
 405                 return mlx5_traffic_enable(dev);
 406         }
 407         return 0;
 408 }