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         unsigned int lro_on = mlx5_lro_on(dev);
 103         enum mlx5_rxq_obj_type obj_type = lro_on ? MLX5_RXQ_OBJ_TYPE_DEVX_RQ :
 104                                                    MLX5_RXQ_OBJ_TYPE_IBV;
 105
 106         /* Allocate/reuse/resize mempool for Multi-Packet RQ. */
 107         if (mlx5_mprq_alloc_mp(dev)) {
 108                 /* Should not release Rx queues but return immediately. */
 109                 return -rte_errno;
 110         }
 111         for (i = 0; i != priv->rxqs_n; ++i) {
 112                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 113                 struct rte_mempool *mp;
 114
 115                 if (!rxq_ctrl)
 116                         continue;
 117                 /* Pre-register Rx mempool. */
 118                 mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
 119                      rxq_ctrl->rxq.mprq_mp : rxq_ctrl->rxq.mp;
 120                 DRV_LOG(DEBUG,
 121                         "port %u Rx queue %u registering"
 122                         " mp %s having %u chunks",
 123                         dev->data->port_id, rxq_ctrl->rxq.idx,
 124                         mp->name, mp->nb_mem_chunks);
 125                 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp);
 126                 ret = rxq_alloc_elts(rxq_ctrl);
 127                 if (ret)
 128                         goto error;
 129                 rxq_ctrl->obj = mlx5_rxq_obj_new(dev, i, obj_type);
 130                 if (!rxq_ctrl->obj)
 131                         goto error;
 132                 if (obj_type == MLX5_RXQ_OBJ_TYPE_IBV)
 133                         rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num;
 134                 else if (obj_type == MLX5_RXQ_OBJ_TYPE_DEVX_RQ)
 135                         rxq_ctrl->wqn = rxq_ctrl->obj->rq->id;
 136         }
 137         return 0;
 138 error:
 139         ret = rte_errno; /* Save rte_errno before cleanup. */
 140         do {
 141                 mlx5_rxq_release(dev, i);
 142         } while (i-- != 0);
 143         rte_errno = ret; /* Restore rte_errno. */
 144         return -rte_errno;
 145 }
 146
 147 /**
 148  * DPDK callback to start the device.
 149  *
 150  * Simulate device start by attaching all configured flows.
 151  *
 152  * @param dev
 153  *   Pointer to Ethernet device structure.
 154  *
 155  * @return
 156  *   0 on success, a negative errno value otherwise and rte_errno is set.
 157  */
 158 int
 159 mlx5_dev_start(struct rte_eth_dev *dev)
 160 {
 161         struct mlx5_priv *priv = dev->data->dev_private;
 162         int ret;
 163
 164         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 165         ret = mlx5_txq_start(dev);
 166         if (ret) {
 167                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 168                         dev->data->port_id, strerror(rte_errno));
 169                 return -rte_errno;
 170         }
 171         ret = mlx5_rxq_start(dev);
 172         if (ret) {
 173                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 174                         dev->data->port_id, strerror(rte_errno));
 175                 mlx5_txq_stop(dev);
 176                 return -rte_errno;
 177         }
 178         dev->data->dev_started = 1;
 179         ret = mlx5_rx_intr_vec_enable(dev);
 180         if (ret) {
 181                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 182                         dev->data->port_id);
 183                 goto error;
 184         }
 185         mlx5_stats_init(dev);
 186         ret = mlx5_traffic_enable(dev);
 187         if (ret) {
 188                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 189                         dev->data->port_id);
 190                 goto error;
 191         }
 192         ret = mlx5_flow_start(dev, &priv->flows);
 193         if (ret) {
 194                 DRV_LOG(DEBUG, "port %u failed to set flows",
 195                         dev->data->port_id);
 196                 goto error;
 197         }
 198         rte_wmb();
 199         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 200         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 201         /* Enable datapath on secondary process. */
 202         mlx5_mp_req_start_rxtx(dev);
 203         mlx5_dev_interrupt_handler_install(dev);
 204         return 0;
 205 error:
 206         ret = rte_errno; /* Save rte_errno before cleanup. */
 207         /* Rollback. */
 208         dev->data->dev_started = 0;
 209         mlx5_flow_stop(dev, &priv->flows);
 210         mlx5_traffic_disable(dev);
 211         mlx5_txq_stop(dev);
 212         mlx5_rxq_stop(dev);
 213         rte_errno = ret; /* Restore rte_errno. */
 214         return -rte_errno;
 215 }
 216
 217 /**
 218  * DPDK callback to stop the device.
 219  *
 220  * Simulate device stop by detaching all configured flows.
 221  *
 222  * @param dev
 223  *   Pointer to Ethernet device structure.
 224  */
 225 void
 226 mlx5_dev_stop(struct rte_eth_dev *dev)
 227 {
 228         struct mlx5_priv *priv = dev->data->dev_private;
 229
 230         dev->data->dev_started = 0;
 231         /* Prevent crashes when queues are still in use. */
 232         dev->rx_pkt_burst = removed_rx_burst;
 233         dev->tx_pkt_burst = removed_tx_burst;
 234         rte_wmb();
 235         /* Disable datapath on secondary process. */
 236         mlx5_mp_req_stop_rxtx(dev);
 237         usleep(1000 * priv->rxqs_n);
 238         DRV_LOG(DEBUG, "port %u stopping device", dev->data->port_id);
 239         mlx5_flow_stop(dev, &priv->flows);
 240         mlx5_traffic_disable(dev);
 241         mlx5_rx_intr_vec_disable(dev);
 242         mlx5_dev_interrupt_handler_uninstall(dev);
 243         mlx5_txq_stop(dev);
 244         mlx5_rxq_stop(dev);
 245 }
 246
 247 /**
 248  * Enable traffic flows configured by control plane
 249  *
 250  * @param dev
 251  *   Pointer to Ethernet device private data.
 252  * @param dev
 253  *   Pointer to Ethernet device structure.
 254  *
 255  * @return
 256  *   0 on success, a negative errno value otherwise and rte_errno is set.
 257  */
 258 int
 259 mlx5_traffic_enable(struct rte_eth_dev *dev)
 260 {
 261         struct mlx5_priv *priv = dev->data->dev_private;
 262         struct rte_flow_item_eth bcast = {
 263                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 264         };
 265         struct rte_flow_item_eth ipv6_multi_spec = {
 266                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 267         };
 268         struct rte_flow_item_eth ipv6_multi_mask = {
 269                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 270         };
 271         struct rte_flow_item_eth unicast = {
 272                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 273         };
 274         struct rte_flow_item_eth unicast_mask = {
 275                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 276         };
 277         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 278         const struct rte_ether_addr cmp = {
 279                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 280         };
 281         unsigned int i;
 282         unsigned int j;
 283         int ret;
 284
 285         if (priv->isolated)
 286                 return 0;
 287         if (dev->data->promiscuous) {
 288                 struct rte_flow_item_eth promisc = {
 289                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 290                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 291                         .type = 0,
 292                 };
 293
 294                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 295                 if (ret)
 296                         goto error;
 297         }
 298         if (dev->data->all_multicast) {
 299                 struct rte_flow_item_eth multicast = {
 300                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 301                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 302                         .type = 0,
 303                 };
 304
 305                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 306                 if (ret)
 307                         goto error;
 308         } else {
 309                 /* Add broadcast/multicast flows. */
 310                 for (i = 0; i != vlan_filter_n; ++i) {
 311                         uint16_t vlan = priv->vlan_filter[i];
 312
 313                         struct rte_flow_item_vlan vlan_spec = {
 314                                 .tci = rte_cpu_to_be_16(vlan),
 315                         };
 316                         struct rte_flow_item_vlan vlan_mask =
 317                                 rte_flow_item_vlan_mask;
 318
 319                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 320                                                   &vlan_spec, &vlan_mask);
 321                         if (ret)
 322                                 goto error;
 323                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 324                                                   &ipv6_multi_mask,
 325                                                   &vlan_spec, &vlan_mask);
 326                         if (ret)
 327                                 goto error;
 328                 }
 329                 if (!vlan_filter_n) {
 330                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 331                         if (ret)
 332                                 goto error;
 333                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 334                                              &ipv6_multi_mask);
 335                         if (ret)
 336                                 goto error;
 337                 }
 338         }
 339         /* Add MAC address flows. */
 340         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 341                 struct rte_ether_addr *mac = &dev->data->mac_addrs[i];
 342
 343                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 344                         continue;
 345                 memcpy(&unicast.dst.addr_bytes,
 346                        mac->addr_bytes,
 347                        RTE_ETHER_ADDR_LEN);
 348                 for (j = 0; j != vlan_filter_n; ++j) {
 349                         uint16_t vlan = priv->vlan_filter[j];
 350
 351                         struct rte_flow_item_vlan vlan_spec = {
 352                                 .tci = rte_cpu_to_be_16(vlan),
 353                         };
 354                         struct rte_flow_item_vlan vlan_mask =
 355                                 rte_flow_item_vlan_mask;
 356
 357                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 358                                                   &unicast_mask,
 359                                                   &vlan_spec,
 360                                                   &vlan_mask);
 361                         if (ret)
 362                                 goto error;
 363                 }
 364                 if (!vlan_filter_n) {
 365                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 366                         if (ret)
 367                                 goto error;
 368                 }
 369         }
 370         return 0;
 371 error:
 372         ret = rte_errno; /* Save rte_errno before cleanup. */
 373         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 374         rte_errno = ret; /* Restore rte_errno. */
 375         return -rte_errno;
 376 }
 377
 378
 379 /**
 380  * Disable traffic flows configured by control plane
 381  *
 382  * @param dev
 383  *   Pointer to Ethernet device private data.
 384  */
 385 void
 386 mlx5_traffic_disable(struct rte_eth_dev *dev)
 387 {
 388         struct mlx5_priv *priv = dev->data->dev_private;
 389
 390         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 391 }
 392
 393 /**
 394  * Restart traffic flows configured by control plane
 395  *
 396  * @param dev
 397  *   Pointer to Ethernet device private data.
 398  *
 399  * @return
 400  *   0 on success, a negative errno value otherwise and rte_errno is set.
 401  */
 402 int
 403 mlx5_traffic_restart(struct rte_eth_dev *dev)
 404 {
 405         if (dev->data->dev_started) {
 406                 mlx5_traffic_disable(dev);
 407                 return mlx5_traffic_enable(dev);
 408         }
 409         return 0;
 410 }