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                 if (!rxq_ctrl->obj)
 128                         goto error;
 129                 rxq_ctrl->wqn = rxq_ctrl->obj->wq->wq_num;
 130         }
 131         return 0;
 132 error:
 133         ret = rte_errno; /* Save rte_errno before cleanup. */
 134         do {
 135                 mlx5_rxq_release(dev, i);
 136         } while (i-- != 0);
 137         rte_errno = ret; /* Restore rte_errno. */
 138         return -rte_errno;
 139 }
 140
 141 /**
 142  * DPDK callback to start the device.
 143  *
 144  * Simulate device start by attaching all configured flows.
 145  *
 146  * @param dev
 147  *   Pointer to Ethernet device structure.
 148  *
 149  * @return
 150  *   0 on success, a negative errno value otherwise and rte_errno is set.
 151  */
 152 int
 153 mlx5_dev_start(struct rte_eth_dev *dev)
 154 {
 155         struct mlx5_priv *priv = dev->data->dev_private;
 156         int ret;
 157
 158         DRV_LOG(DEBUG, "port %u starting device", dev->data->port_id);
 159         ret = mlx5_txq_start(dev);
 160         if (ret) {
 161                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 162                         dev->data->port_id, strerror(rte_errno));
 163                 return -rte_errno;
 164         }
 165         ret = mlx5_rxq_start(dev);
 166         if (ret) {
 167                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 168                         dev->data->port_id, strerror(rte_errno));
 169                 mlx5_txq_stop(dev);
 170                 return -rte_errno;
 171         }
 172         dev->data->dev_started = 1;
 173         ret = mlx5_rx_intr_vec_enable(dev);
 174         if (ret) {
 175                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 176                         dev->data->port_id);
 177                 goto error;
 178         }
 179         mlx5_stats_init(dev);
 180         ret = mlx5_traffic_enable(dev);
 181         if (ret) {
 182                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 183                         dev->data->port_id);
 184                 goto error;
 185         }
 186         ret = mlx5_flow_start(dev, &priv->flows);
 187         if (ret) {
 188                 DRV_LOG(DEBUG, "port %u failed to set flows",
 189                         dev->data->port_id);
 190                 goto error;
 191         }
 192         rte_wmb();
 193         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 194         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 195         /* Enable datapath on secondary process. */
 196         mlx5_mp_req_start_rxtx(dev);
 197         mlx5_dev_interrupt_handler_install(dev);
 198         return 0;
 199 error:
 200         ret = rte_errno; /* Save rte_errno before cleanup. */
 201         /* Rollback. */
 202         dev->data->dev_started = 0;
 203         mlx5_flow_stop(dev, &priv->flows);
 204         mlx5_traffic_disable(dev);
 205         mlx5_txq_stop(dev);
 206         mlx5_rxq_stop(dev);
 207         rte_errno = ret; /* Restore rte_errno. */
 208         return -rte_errno;
 209 }
 210
 211 /**
 212  * DPDK callback to stop the device.
 213  *
 214  * Simulate device stop by detaching all configured flows.
 215  *
 216  * @param dev
 217  *   Pointer to Ethernet device structure.
 218  */
 219 void
 220 mlx5_dev_stop(struct rte_eth_dev *dev)
 221 {
 222         struct mlx5_priv *priv = dev->data->dev_private;
 223
 224         dev->data->dev_started = 0;
 225         /* Prevent crashes when queues are still in use. */
 226         dev->rx_pkt_burst = removed_rx_burst;
 227         dev->tx_pkt_burst = removed_tx_burst;
 228         rte_wmb();
 229         /* Disable datapath on secondary process. */
 230         mlx5_mp_req_stop_rxtx(dev);
 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 mlx5_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 rte_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 rte_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                        RTE_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 mlx5_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 }