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