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         enum mlx5_rxq_obj_type obj_type = MLX5_RXQ_OBJ_TYPE_IBV;
 103
 104         for (i = 0; i < priv->rxqs_n; ++i) {
 105                 if ((*priv->rxqs)[i]->lro) {
 106                         obj_type =  MLX5_RXQ_OBJ_TYPE_DEVX_RQ;
 107                         break;
 108                 }
 109         }
 110         /* Allocate/reuse/resize mempool for Multi-Packet RQ. */
 111         if (mlx5_mprq_alloc_mp(dev)) {
 112                 /* Should not release Rx queues but return immediately. */
 113                 return -rte_errno;
 114         }
 115         for (i = 0; i != priv->rxqs_n; ++i) {
 116                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 117                 struct rte_mempool *mp;
 118
 119                 if (!rxq_ctrl)
 120                         continue;
 121                 /* Pre-register Rx mempool. */
 122                 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
 123                      rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp;
 124                 DRV_LOG(DEBUG,
 125                         "port %u Rx queue %u registering"
 126                         " mp %s having %u chunks",
 127                         dev->data->port_id, rxq_ctrl->rxq.idx,
 128                         mp->name, mp->nb_mem_chunks);
 129                 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp);
 130                 ret = rxq_alloc_elts(rxq_ctrl);
 131                 if (ret)
 132                         goto error;
 133                 rxq_ctrl->obj = mlx5_rxq_obj_new(dev, i, obj_type);
 134                 if (!rxq_ctrl->obj)
 135                         goto error;
 136                 if (obj_type == MLX5_RXQ_OBJ_TYPE_IBV)
 137                         rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num;
 138                 else if (obj_type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ)
 139                         rxq_ctrl->wqn = rxq_ctrl->obj->rq->id;
 140         }
 141         return 0;
 142 error:
 143         ret = rte_errno; /* Save rte_errno before cleanup. */
 144         do {
 145                 mlx5_rxq_release(dev, i);
 146         } while (i-- != 0);
 147         rte_errno = ret; /* Restore rte_errno. */
 148         return -rte_errno;
 149 }
 150
 151 /**
 152  * DPDK callback to start the device.
 153  *
 154  * Simulate device start by attaching all configured flows.
 155  *
 156  * @param dev
 157  *   Pointer to Ethernet device structure.
 158  *
 159  * @return
 160  *   0 on success, a negative errno value otherwise and rte_errno is set.
 161  */
 162 int
 163 mlx5_dev_start(struct rte_eth_dev *dev)
 164 {
 165         struct mlx5_priv *priv = dev->data->dev_private;
 166         int ret;
 167
 168         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 169         ret = mlx5_txq_start(dev);
 170         if (ret) {
 171                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 172                         dev->data->port_id, strerror(rte_errno));
 173                 return -rte_errno;
 174         }
 175         ret = mlx5_rxq_start(dev);
 176         if (ret) {
 177                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 178                         dev->data->port_id, strerror(rte_errno));
 179                 mlx5_txq_stop(dev);
 180                 return -rte_errno;
 181         }
 182         dev->data->dev_started = 1;
 183         ret = mlx5_rx_intr_vec_enable(dev);
 184         if (ret) {
 185                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 186                         dev->data->port_id);
 187                 goto error;
 188         }
 189         mlx5_stats_init(dev);
 190         ret = mlx5_traffic_enable(dev);
 191         if (ret) {
 192                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 193                         dev->data->port_id);
 194                 goto error;
 195         }
 196         ret = mlx5_flow_start(dev, &priv->flows);
 197         if (ret) {
 198                 DRV_LOG(DEBUG, "port %u failed to set flows",
 199                         dev->data->port_id);
 200                 goto error;
 201         }
 202         rte_wmb();
 203         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 204         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 205         /* Enable datapath on secondary process. */
 206         mlx5_mp_req_start_rxtx(dev);
 207         mlx5_dev_interrupt_handler_install(dev);
 208         return 0;
 209 error:
 210         ret = rte_errno; /* Save rte_errno before cleanup. */
 211         /* Rollback. */
 212         dev->data->dev_started = 0;
 213         mlx5_flow_stop(dev, &priv->flows);
 214         mlx5_traffic_disable(dev);
 215         mlx5_txq_stop(dev);
 216         mlx5_rxq_stop(dev);
 217         rte_errno = ret; /* Restore rte_errno. */
 218         return -rte_errno;
 219 }
 220
 221 /**
 222  * DPDK callback to stop the device.
 223  *
 224  * Simulate device stop by detaching all configured flows.
 225  *
 226  * @param dev
 227  *   Pointer to Ethernet device structure.
 228  */
 229 void
 230 mlx5_dev_stop(struct rte_eth_dev *dev)
 231 {
 232         struct mlx5_priv *priv = dev->data->dev_private;
 233
 234         dev->data->dev_started = 0;
 235         /* Prevent crashes when queues are still in use. */
 236         dev->rx_pkt_burst = removed_rx_burst;
 237         dev->tx_pkt_burst = removed_tx_burst;
 238         rte_wmb();
 239         /* Disable datapath on secondary process. */
 240         mlx5_mp_req_stop_rxtx(dev);
 241         usleep(1000 * priv->rxqs_n);
 242         DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id);
 243         mlx5_flow_stop(dev, &priv->flows);
 244         mlx5_traffic_disable(dev);
 245         mlx5_rx_intr_vec_disable(dev);
 246         mlx5_dev_interrupt_handler_uninstall(dev);
 247         mlx5_txq_stop(dev);
 248         mlx5_rxq_stop(dev);
 249 }
 250
 251 /**
 252  * Enable traffic flows configured by control plane
 253  *
 254  * @param dev
 255  *   Pointer to Ethernet device private data.
 256  * @param dev
 257  *   Pointer to Ethernet device structure.
 258  *
 259  * @return
 260  *   0 on success, a negative errno value otherwise and rte_errno is set.
 261  */
 262 int
 263 mlx5_traffic_enable(struct rte_eth_dev *dev)
 264 {
 265         struct mlx5_priv *priv = dev->data->dev_private;
 266         struct rte_flow_item_eth bcast = {
 267                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 268         };
 269         struct rte_flow_item_eth ipv6_multi_spec = {
 270                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 271         };
 272         struct rte_flow_item_eth ipv6_multi_mask = {
 273                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 274         };
 275         struct rte_flow_item_eth unicast = {
 276                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 277         };
 278         struct rte_flow_item_eth unicast_mask = {
 279                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 280         };
 281         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 282         const struct rte_ether_addr cmp = {
 283                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 284         };
 285         unsigned int i;
 286         unsigned int j;
 287         int ret;
 288
 289         if (priv->isolated)
 290                 return 0;
 291         if (dev->data->promiscuous) {
 292                 struct rte_flow_item_eth promisc = {
 293                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 294                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 295                         .type = 0,
 296                 };
 297
 298                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 299                 if (ret)
 300                         goto error;
 301         }
 302         if (dev->data->all_multicast) {
 303                 struct rte_flow_item_eth multicast = {
 304                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 305                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 306                         .type = 0,
 307                 };
 308
 309                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 310                 if (ret)
 311                         goto error;
 312         } else {
 313                 /* Add broadcast/multicast flows. */
 314                 for (i = 0; i != vlan_filter_n; ++i) {
 315                         uint16_t vlan = priv->vlan_filter[i];
 316
 317                         struct rte_flow_item_vlan vlan_spec = {
 318                                 .tci = rte_cpu_to_be_16(vlan),
 319                         };
 320                         struct rte_flow_item_vlan vlan_mask =
 321                                 rte_flow_item_vlan_mask;
 322
 323                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 324                                                   &vlan_spec, &vlan_mask);
 325                         if (ret)
 326                                 goto error;
 327                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 328                                                   &ipv6_multi_mask,
 329                                                   &vlan_spec, &vlan_mask);
 330                         if (ret)
 331                                 goto error;
 332                 }
 333                 if (!vlan_filter_n) {
 334                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 335                         if (ret)
 336                                 goto error;
 337                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 338                                              &ipv6_multi_mask);
 339                         if (ret)
 340                                 goto error;
 341                 }
 342         }
 343         /* Add MAC address flows. */
 344         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 345                 struct rte_ether_addr *mac = &dev->data->mac_addrs[i];
 346
 347                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 348                         continue;
 349                 memcpy(&unicast.dst.addr_bytes,
 350                        mac->addr_bytes,
 351                        RTE_ETHER_ADDR_LEN);
 352                 for (j = 0; j != vlan_filter_n; ++j) {
 353                         uint16_t vlan = priv->vlan_filter[j];
 354
 355                         struct rte_flow_item_vlan vlan_spec = {
 356                                 .tci = rte_cpu_to_be_16(vlan),
 357                         };
 358                         struct rte_flow_item_vlan vlan_mask =
 359                                 rte_flow_item_vlan_mask;
 360
 361                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 362                                                   &unicast_mask,
 363                                                   &vlan_spec,
 364                                                   &vlan_mask);
 365                         if (ret)
 366                                 goto error;
 367                 }
 368                 if (!vlan_filter_n) {
 369                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 370                         if (ret)
 371                                 goto error;
 372                 }
 373         }
 374         return 0;
 375 error:
 376         ret = rte_errno; /* Save rte_errno before cleanup. */
 377         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 378         rte_errno = ret; /* Restore rte_errno. */
 379         return -rte_errno;
 380 }
 381
 382
 383 /**
 384  * Disable traffic flows configured by control plane
 385  *
 386  * @param dev
 387  *   Pointer to Ethernet device private data.
 388  */
 389 void
 390 mlx5_traffic_disable(struct rte_eth_dev *dev)
 391 {
 392         struct mlx5_priv *priv = dev->data->dev_private;
 393
 394         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 395 }
 396
 397 /**
 398  * Restart traffic flows configured by control plane
 399  *
 400  * @param dev
 401  *   Pointer to Ethernet device private data.
 402  *
 403  * @return
 404  *   0 on success, a negative errno value otherwise and rte_errno is set.
 405  */
 406 int
 407 mlx5_traffic_restart(struct rte_eth_dev *dev)
 408 {
 409         if (dev->data->dev_started) {
 410                 mlx5_traffic_disable(dev);
 411                 return mlx5_traffic_enable(dev);
 412         }
 413         return 0;
 414 }