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                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i);
  52
  53                 if (!txq_ctrl)
  54                         continue;
  55                 txq_alloc_elts(txq_ctrl);
  56                 txq_ctrl->ibv = mlx5_txq_ibv_new(dev, i);
  57                 if (!txq_ctrl->ibv) {
  58                         rte_errno = ENOMEM;
  59                         goto error;
  60                 }
  61         }
  62         ret = mlx5_tx_uar_remap(dev, priv->ctx->cmd_fd);
  63         if (ret)
  64                 goto error;
  65         return 0;
  66 error:
  67         ret = rte_errno; /* Save rte_errno before cleanup. */
  68         mlx5_txq_stop(dev);
  69         rte_errno = ret; /* Restore rte_errno. */
  70         return -rte_errno;
  71 }
  72
  73 /**
  74  * Stop traffic on Rx queues.
  75  *
  76  * @param dev
  77  *   Pointer to Ethernet device structure.
  78  */
  79 static void
  80 mlx5_rxq_stop(struct rte_eth_dev *dev)
  81 {
  82         struct priv *priv = dev->data->dev_private;
  83         unsigned int i;
  84
  85         for (i = 0; i != priv->rxqs_n; ++i)
  86                 mlx5_rxq_release(dev, i);
  87 }
  88
  89 /**
  90  * Start traffic on Rx queues.
  91  *
  92  * @param dev
  93  *   Pointer to Ethernet device structure.
  94  *
  95  * @return
  96  *   0 on success, a negative errno value otherwise and rte_errno is set.
  97  */
  98 static int
  99 mlx5_rxq_start(struct rte_eth_dev *dev)
 100 {
 101         struct priv *priv = dev->data->dev_private;
 102         unsigned int i;
 103         int ret = 0;
 104
 105         for (i = 0; i != priv->rxqs_n; ++i) {
 106                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 107
 108                 if (!rxq_ctrl)
 109                         continue;
 110                 ret = rxq_alloc_elts(rxq_ctrl);
 111                 if (ret)
 112                         goto error;
 113                 rxq_ctrl->ibv = mlx5_rxq_ibv_new(dev, i);
 114                 if (!rxq_ctrl->ibv)
 115                         goto error;
 116         }
 117         return 0;
 118 error:
 119         ret = rte_errno; /* Save rte_errno before cleanup. */
 120         mlx5_rxq_stop(dev);
 121         rte_errno = ret; /* Restore rte_errno. */
 122         return -rte_errno;
 123 }
 124
 125 /**
 126  * DPDK callback to start the device.
 127  *
 128  * Simulate device start by attaching all configured flows.
 129  *
 130  * @param dev
 131  *   Pointer to Ethernet device structure.
 132  *
 133  * @return
 134  *   0 on success, a negative errno value otherwise and rte_errno is set.
 135  */
 136 int
 137 mlx5_dev_start(struct rte_eth_dev *dev)
 138 {
 139         struct priv *priv = dev->data->dev_private;
 140         int ret;
 141
 142         dev->data->dev_started = 1;
 143         DRV_LOG(DEBUG, "port %u allocating and configuring hash Rx queues",
 144                 dev->data->port_id);
 145         ret = mlx5_txq_start(dev);
 146         if (ret) {
 147                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 148                         dev->data->port_id, strerror(rte_errno));
 149                 goto error;
 150         }
 151         ret = mlx5_rxq_start(dev);
 152         if (ret) {
 153                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 154                         dev->data->port_id, strerror(rte_errno));
 155                 goto error;
 156         }
 157         ret = mlx5_rx_intr_vec_enable(dev);
 158         if (ret) {
 159                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 160                         dev->data->port_id);
 161                 goto error;
 162         }
 163         mlx5_xstats_init(dev);
 164         ret = mlx5_traffic_enable(dev);
 165         if (ret) {
 166                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 167                         dev->data->port_id);
 168                 goto error;
 169         }
 170         ret = mlx5_flow_start(dev, &priv->flows);
 171         if (ret) {
 172                 DRV_LOG(DEBUG, "port %u failed to set flows",
 173                         dev->data->port_id);
 174                 goto error;
 175         }
 176         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 177         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 178         mlx5_dev_interrupt_handler_install(dev);
 179         return 0;
 180 error:
 181         ret = rte_errno; /* Save rte_errno before cleanup. */
 182         /* Rollback. */
 183         dev->data->dev_started = 0;
 184         mlx5_flow_stop(dev, &priv->flows);
 185         mlx5_traffic_disable(dev);
 186         mlx5_txq_stop(dev);
 187         mlx5_rxq_stop(dev);
 188         rte_errno = ret; /* Restore rte_errno. */
 189         return -rte_errno;
 190 }
 191
 192 /**
 193  * DPDK callback to stop the device.
 194  *
 195  * Simulate device stop by detaching all configured flows.
 196  *
 197  * @param dev
 198  *   Pointer to Ethernet device structure.
 199  */
 200 void
 201 mlx5_dev_stop(struct rte_eth_dev *dev)
 202 {
 203         struct priv *priv = dev->data->dev_private;
 204
 205         dev->data->dev_started = 0;
 206         /* Prevent crashes when queues are still in use. */
 207         dev->rx_pkt_burst = removed_rx_burst;
 208         dev->tx_pkt_burst = removed_tx_burst;
 209         rte_wmb();
 210         usleep(1000 * priv->rxqs_n);
 211         DRV_LOG(DEBUG, "port %u cleaning up and destroying hash Rx queues",
 212                 dev->data->port_id);
 213         mlx5_flow_stop(dev, &priv->flows);
 214         mlx5_traffic_disable(dev);
 215         mlx5_rx_intr_vec_disable(dev);
 216         mlx5_dev_interrupt_handler_uninstall(dev);
 217         mlx5_txq_stop(dev);
 218         mlx5_rxq_stop(dev);
 219 }
 220
 221 /**
 222  * Enable traffic flows configured by control plane
 223  *
 224  * @param dev
 225  *   Pointer to Ethernet device private data.
 226  * @param dev
 227  *   Pointer to Ethernet device structure.
 228  *
 229  * @return
 230  *   0 on success, a negative errno value otherwise and rte_errno is set.
 231  */
 232 int
 233 mlx5_traffic_enable(struct rte_eth_dev *dev)
 234 {
 235         struct priv *priv = dev->data->dev_private;
 236         struct rte_flow_item_eth bcast = {
 237                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 238         };
 239         struct rte_flow_item_eth ipv6_multi_spec = {
 240                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 241         };
 242         struct rte_flow_item_eth ipv6_multi_mask = {
 243                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 244         };
 245         struct rte_flow_item_eth unicast = {
 246                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 247         };
 248         struct rte_flow_item_eth unicast_mask = {
 249                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 250         };
 251         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 252         const struct ether_addr cmp = {
 253                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 254         };
 255         unsigned int i;
 256         unsigned int j;
 257         int ret;
 258
 259         if (priv->isolated)
 260                 return 0;
 261         if (dev->data->promiscuous) {
 262                 struct rte_flow_item_eth promisc = {
 263                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 264                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 265                         .type = 0,
 266                 };
 267
 268                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 269                 if (ret)
 270                         goto error;
 271         }
 272         if (dev->data->all_multicast) {
 273                 struct rte_flow_item_eth multicast = {
 274                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 275                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 276                         .type = 0,
 277                 };
 278
 279                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 280                 if (ret)
 281                         goto error;
 282         } else {
 283                 /* Add broadcast/multicast flows. */
 284                 for (i = 0; i != vlan_filter_n; ++i) {
 285                         uint16_t vlan = priv->vlan_filter[i];
 286
 287                         struct rte_flow_item_vlan vlan_spec = {
 288                                 .tci = rte_cpu_to_be_16(vlan),
 289                         };
 290                         struct rte_flow_item_vlan vlan_mask = {
 291                                 .tci = 0xffff,
 292                         };
 293
 294                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 295                                                   &vlan_spec, &vlan_mask);
 296                         if (ret)
 297                                 goto error;
 298                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 299                                                   &ipv6_multi_mask,
 300                                                   &vlan_spec, &vlan_mask);
 301                         if (ret)
 302                                 goto error;
 303                 }
 304                 if (!vlan_filter_n) {
 305                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 306                         if (ret)
 307                                 goto error;
 308                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 309                                              &ipv6_multi_mask);
 310                         if (ret)
 311                                 goto error;
 312                 }
 313         }
 314         /* Add MAC address flows. */
 315         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 316                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 317
 318                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 319                         continue;
 320                 memcpy(&unicast.dst.addr_bytes,
 321                        mac->addr_bytes,
 322                        ETHER_ADDR_LEN);
 323                 for (j = 0; j != vlan_filter_n; ++j) {
 324                         uint16_t vlan = priv->vlan_filter[j];
 325
 326                         struct rte_flow_item_vlan vlan_spec = {
 327                                 .tci = rte_cpu_to_be_16(vlan),
 328                         };
 329                         struct rte_flow_item_vlan vlan_mask = {
 330                                 .tci = 0xffff,
 331                         };
 332
 333                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 334                                                   &unicast_mask,
 335                                                   &vlan_spec,
 336                                                   &vlan_mask);
 337                         if (ret)
 338                                 goto error;
 339                 }
 340                 if (!vlan_filter_n) {
 341                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 342                         if (ret)
 343                                 goto error;
 344                 }
 345         }
 346         return 0;
 347 error:
 348         ret = rte_errno; /* Save rte_errno before cleanup. */
 349         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 350         rte_errno = ret; /* Restore rte_errno. */
 351         return -rte_errno;
 352 }
 353
 354
 355 /**
 356  * Disable traffic flows configured by control plane
 357  *
 358  * @param dev
 359  *   Pointer to Ethernet device private data.
 360  */
 361 void
 362 mlx5_traffic_disable(struct rte_eth_dev *dev)
 363 {
 364         struct priv *priv = dev->data->dev_private;
 365
 366         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 367 }
 368
 369 /**
 370  * Restart traffic flows configured by control plane
 371  *
 372  * @param dev
 373  *   Pointer to Ethernet device private data.
 374  *
 375  * @return
 376  *   0 on success, a negative errno value otherwise and rte_errno is set.
 377  */
 378 int
 379 mlx5_traffic_restart(struct rte_eth_dev *dev)
 380 {
 381         if (dev->data->dev_started) {
 382                 mlx5_traffic_disable(dev);
 383                 return mlx5_traffic_enable(dev);
 384         }
 385         return 0;
 386 }