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