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 mlx5_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 mlx5_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         return 0;
  62 error:
  63         ret = rte_errno; /* Save rte_errno before cleanup. */
  64         do {
  65                 mlx5_txq_release(dev, i);
  66         } while (i-- != 0);
  67         rte_errno = ret; /* Restore rte_errno. */
  68         return -rte_errno;
  69 }
  70
  71 /**
  72  * Stop traffic on Rx queues.
  73  *
  74  * @param dev
  75  *   Pointer to Ethernet device structure.
  76  */
  77 static void
  78 mlx5_rxq_stop(struct rte_eth_dev *dev)
  79 {
  80         struct mlx5_priv *priv = dev->data->dev_private;
  81         unsigned int i;
  82
  83         for (i = 0; i != priv->rxqs_n; ++i)
  84                 mlx5_rxq_release(dev, i);
  85 }
  86
  87 /**
  88  * Start traffic on Rx queues.
  89  *
  90  * @param dev
  91  *   Pointer to Ethernet device structure.
  92  *
  93  * @return
  94  *   0 on success, a negative errno value otherwise and rte_errno is set.
  95  */
  96 static int
  97 mlx5_rxq_start(struct rte_eth_dev *dev)
  98 {
  99         struct mlx5_priv *priv = dev->data->dev_private;
 100         unsigned int i;
 101         int ret = 0;
 102
 103         /* Allocate/reuse/resize mempool for Multi-Packet RQ. */
 104         if (mlx5_mprq_alloc_mp(dev)) {
 105                 /* Should not release Rx queues but return immediately. */
 106                 return -rte_errno;
 107         }
 108         for (i = 0; i != priv->rxqs_n; ++i) {
 109                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 110                 struct rte_mempool *mp;
 111
 112                 if (!rxq_ctrl)
 113                         continue;
 114                 /* Pre-register Rx mempool. */
 115                 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
 116                      rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp;
 117                 DRV_LOG(DEBUG,
 118                         "port %u Rx queue %u registering"
 119                         " mp %s having %u chunks",
 120                         dev->data->port_id, rxq_ctrl->rxq.idx,
 121                         mp->name, mp->nb_mem_chunks);
 122                 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp);
 123                 ret = rxq_alloc_elts(rxq_ctrl);
 124                 if (ret)
 125                         goto error;
 126                 rxq_ctrl->obj = mlx5_rxq_obj_new(dev, i,
 127                                                  MLX5_RXQ_OBJ_TYPE_DEVX_RQ);
 128                 if (!rxq_ctrl->obj)
 129                         goto error;
 130                 rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num;
 131         }
 132         return 0;
 133 error:
 134         ret = rte_errno; /* Save rte_errno before cleanup. */
 135         do {
 136                 mlx5_rxq_release(dev, i);
 137         } while (i-- != 0);
 138         rte_errno = ret; /* Restore rte_errno. */
 139         return -rte_errno;
 140 }
 141
 142 /**
 143  * DPDK callback to start the device.
 144  *
 145  * Simulate device start by attaching all configured flows.
 146  *
 147  * @param dev
 148  *   Pointer to Ethernet device structure.
 149  *
 150  * @return
 151  *   0 on success, a negative errno value otherwise and rte_errno is set.
 152  */
 153 int
 154 mlx5_dev_start(struct rte_eth_dev *dev)
 155 {
 156         struct mlx5_priv *priv = dev->data->dev_private;
 157         int ret;
 158
 159         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 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                 return -rte_errno;
 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                 mlx5_txq_stop(dev);
 171                 return -rte_errno;
 172         }
 173         dev->data->dev_started = 1;
 174         ret = mlx5_rx_intr_vec_enable(dev);
 175         if (ret) {
 176                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 177                         dev->data->port_id);
 178                 goto error;
 179         }
 180         mlx5_stats_init(dev);
 181         ret = mlx5_traffic_enable(dev);
 182         if (ret) {
 183                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 184                         dev->data->port_id);
 185                 goto error;
 186         }
 187         ret = mlx5_flow_start(dev, &priv->flows);
 188         if (ret) {
 189                 DRV_LOG(DEBUG, "port %u failed to set flows",
 190                         dev->data->port_id);
 191                 goto error;
 192         }
 193         rte_wmb();
 194         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 195         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 196         /* Enable datapath on secondary process. */
 197         mlx5_mp_req_start_rxtx(dev);
 198         mlx5_dev_interrupt_handler_install(dev);
 199         return 0;
 200 error:
 201         ret = rte_errno; /* Save rte_errno before cleanup. */
 202         /* Rollback. */
 203         dev->data->dev_started = 0;
 204         mlx5_flow_stop(dev, &priv->flows);
 205         mlx5_traffic_disable(dev);
 206         mlx5_txq_stop(dev);
 207         mlx5_rxq_stop(dev);
 208         rte_errno = ret; /* Restore rte_errno. */
 209         return -rte_errno;
 210 }
 211
 212 /**
 213  * DPDK callback to stop the device.
 214  *
 215  * Simulate device stop by detaching all configured flows.
 216  *
 217  * @param dev
 218  *   Pointer to Ethernet device structure.
 219  */
 220 void
 221 mlx5_dev_stop(struct rte_eth_dev *dev)
 222 {
 223         struct mlx5_priv *priv = dev->data->dev_private;
 224
 225         dev->data->dev_started = 0;
 226         /* Prevent crashes when queues are still in use. */
 227         dev->rx_pkt_burst = removed_rx_burst;
 228         dev->tx_pkt_burst = removed_tx_burst;
 229         rte_wmb();
 230         /* Disable datapath on secondary process. */
 231         mlx5_mp_req_stop_rxtx(dev);
 232         usleep(1000 * priv->rxqs_n);
 233         DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id);
 234         mlx5_flow_stop(dev, &priv->flows);
 235         mlx5_traffic_disable(dev);
 236         mlx5_rx_intr_vec_disable(dev);
 237         mlx5_dev_interrupt_handler_uninstall(dev);
 238         mlx5_txq_stop(dev);
 239         mlx5_rxq_stop(dev);
 240 }
 241
 242 /**
 243  * Enable traffic flows configured by control plane
 244  *
 245  * @param dev
 246  *   Pointer to Ethernet device private data.
 247  * @param dev
 248  *   Pointer to Ethernet device structure.
 249  *
 250  * @return
 251  *   0 on success, a negative errno value otherwise and rte_errno is set.
 252  */
 253 int
 254 mlx5_traffic_enable(struct rte_eth_dev *dev)
 255 {
 256         struct mlx5_priv *priv = dev->data->dev_private;
 257         struct rte_flow_item_eth bcast = {
 258                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 259         };
 260         struct rte_flow_item_eth ipv6_multi_spec = {
 261                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 262         };
 263         struct rte_flow_item_eth ipv6_multi_mask = {
 264                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 265         };
 266         struct rte_flow_item_eth unicast = {
 267                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 268         };
 269         struct rte_flow_item_eth unicast_mask = {
 270                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 271         };
 272         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 273         const struct rte_ether_addr cmp = {
 274                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 275         };
 276         unsigned int i;
 277         unsigned int j;
 278         int ret;
 279
 280         if (priv->isolated)
 281                 return 0;
 282         if (dev->data->promiscuous) {
 283                 struct rte_flow_item_eth promisc = {
 284                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 285                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 286                         .type = 0,
 287                 };
 288
 289                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 290                 if (ret)
 291                         goto error;
 292         }
 293         if (dev->data->all_multicast) {
 294                 struct rte_flow_item_eth multicast = {
 295                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 296                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 297                         .type = 0,
 298                 };
 299
 300                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 301                 if (ret)
 302                         goto error;
 303         } else {
 304                 /* Add broadcast/multicast flows. */
 305                 for (i = 0; i != vlan_filter_n; ++i) {
 306                         uint16_t vlan = priv->vlan_filter[i];
 307
 308                         struct rte_flow_item_vlan vlan_spec = {
 309                                 .tci = rte_cpu_to_be_16(vlan),
 310                         };
 311                         struct rte_flow_item_vlan vlan_mask =
 312                                 rte_flow_item_vlan_mask;
 313
 314                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 315                                                   &vlan_spec, &vlan_mask);
 316                         if (ret)
 317                                 goto error;
 318                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 319                                                   &ipv6_multi_mask,
 320                                                   &vlan_spec, &vlan_mask);
 321                         if (ret)
 322                                 goto error;
 323                 }
 324                 if (!vlan_filter_n) {
 325                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 326                         if (ret)
 327                                 goto error;
 328                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 329                                              &ipv6_multi_mask);
 330                         if (ret)
 331                                 goto error;
 332                 }
 333         }
 334         /* Add MAC address flows. */
 335         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 336                 struct rte_ether_addr *mac = &dev->data->mac_addrs[i];
 337
 338                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 339                         continue;
 340                 memcpy(&unicast.dst.addr_bytes,
 341                        mac->addr_bytes,
 342                        RTE_ETHER_ADDR_LEN);
 343                 for (j = 0; j != vlan_filter_n; ++j) {
 344                         uint16_t vlan = priv->vlan_filter[j];
 345
 346                         struct rte_flow_item_vlan vlan_spec = {
 347                                 .tci = rte_cpu_to_be_16(vlan),
 348                         };
 349                         struct rte_flow_item_vlan vlan_mask =
 350                                 rte_flow_item_vlan_mask;
 351
 352                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 353                                                   &unicast_mask,
 354                                                   &vlan_spec,
 355                                                   &vlan_mask);
 356                         if (ret)
 357                                 goto error;
 358                 }
 359                 if (!vlan_filter_n) {
 360                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 361                         if (ret)
 362                                 goto error;
 363                 }
 364         }
 365         return 0;
 366 error:
 367         ret = rte_errno; /* Save rte_errno before cleanup. */
 368         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 369         rte_errno = ret; /* Restore rte_errno. */
 370         return -rte_errno;
 371 }
 372
 373
 374 /**
 375  * Disable traffic flows configured by control plane
 376  *
 377  * @param dev
 378  *   Pointer to Ethernet device private data.
 379  */
 380 void
 381 mlx5_traffic_disable(struct rte_eth_dev *dev)
 382 {
 383         struct mlx5_priv *priv = dev->data->dev_private;
 384
 385         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 386 }
 387
 388 /**
 389  * Restart traffic flows configured by control plane
 390  *
 391  * @param dev
 392  *   Pointer to Ethernet device private data.
 393  *
 394  * @return
 395  *   0 on success, a negative errno value otherwise and rte_errno is set.
 396  */
 397 int
 398 mlx5_traffic_restart(struct rte_eth_dev *dev)
 399 {
 400         if (dev->data->dev_started) {
 401                 mlx5_traffic_disable(dev);
 402                 return mlx5_traffic_enable(dev);
 403         }
 404         return 0;
 405 }