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         /* Add memory regions to Tx queues. */
  50         for (i = 0; i != priv->txqs_n; ++i) {
  51                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_txq_get(dev, i);
  52
  53                 if (!txq_ctrl)
  54                         continue;
  55                 txq_alloc_elts(txq_ctrl);
  56                 txq_ctrl->ibv = mlx5_txq_ibv_new(dev, i);
  57                 if (!txq_ctrl->ibv) {
  58                         rte_errno = ENOMEM;
  59                         goto error;
  60                 }
  61         }
  62         ret = mlx5_tx_uar_remap(dev, priv->ctx->cmd_fd);
  63         if (ret)
  64                 goto error;
  65         return 0;
  66 error:
  67         ret = rte_errno; /* Save rte_errno before cleanup. */
  68         mlx5_txq_stop(dev);
  69         rte_errno = ret; /* Restore rte_errno. */
  70         return -rte_errno;
  71 }
  72
  73 /**
  74  * Stop traffic on Rx queues.
  75  *
  76  * @param dev
  77  *   Pointer to Ethernet device structure.
  78  */
  79 static void
  80 mlx5_rxq_stop(struct rte_eth_dev *dev)
  81 {
  82         struct priv *priv = dev->data->dev_private;
  83         unsigned int i;
  84
  85         for (i = 0; i != priv->rxqs_n; ++i)
  86                 mlx5_rxq_release(dev, i);
  87 }
  88
  89 /**
  90  * Start traffic on Rx queues.
  91  *
  92  * @param dev
  93  *   Pointer to Ethernet device structure.
  94  *
  95  * @return
  96  *   0 on success, a negative errno value otherwise and rte_errno is set.
  97  */
  98 static int
  99 mlx5_rxq_start(struct rte_eth_dev *dev)
 100 {
 101         struct priv *priv = dev->data->dev_private;
 102         unsigned int i;
 103         int ret = 0;
 104
 105         /* Allocate/reuse/resize mempool for Multi-Packet RQ. */
 106         if (mlx5_mprq_alloc_mp(dev))
 107                 goto error;
 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->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->ibv = mlx5_rxq_ibv_new(dev, i);
 127                 if (!rxq_ctrl->ibv)
 128                         goto error;
 129         }
 130         return 0;
 131 error:
 132         ret = rte_errno; /* Save rte_errno before cleanup. */
 133         mlx5_rxq_stop(dev);
 134         rte_errno = ret; /* Restore rte_errno. */
 135         return -rte_errno;
 136 }
 137
 138 /**
 139  * DPDK callback to start the device.
 140  *
 141  * Simulate device start by attaching all configured flows.
 142  *
 143  * @param dev
 144  *   Pointer to Ethernet device structure.
 145  *
 146  * @return
 147  *   0 on success, a negative errno value otherwise and rte_errno is set.
 148  */
 149 int
 150 mlx5_dev_start(struct rte_eth_dev *dev)
 151 {
 152         struct priv *priv = dev->data->dev_private;
 153         int ret;
 154
 155         dev->data->dev_started = 1;
 156         DRV_LOG(DEBUG, "port %u allocating and configuring hash Rx queues",
 157                 dev->data->port_id);
 158         ret = mlx5_txq_start(dev);
 159         if (ret) {
 160                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 161                         dev->data->port_id, strerror(rte_errno));
 162                 goto error;
 163         }
 164         ret = mlx5_rxq_start(dev);
 165         if (ret) {
 166                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 167                         dev->data->port_id, strerror(rte_errno));
 168                 goto error;
 169         }
 170         ret = mlx5_rx_intr_vec_enable(dev);
 171         if (ret) {
 172                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 173                         dev->data->port_id);
 174                 goto error;
 175         }
 176         mlx5_xstats_init(dev);
 177         ret = mlx5_traffic_enable(dev);
 178         if (ret) {
 179                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 180                         dev->data->port_id);
 181                 goto error;
 182         }
 183         ret = mlx5_flow_start(dev, &priv->flows);
 184         if (ret) {
 185                 DRV_LOG(DEBUG, "port %u failed to set flows",
 186                         dev->data->port_id);
 187                 goto error;
 188         }
 189         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 190         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 191         mlx5_dev_interrupt_handler_install(dev);
 192         return 0;
 193 error:
 194         ret = rte_errno; /* Save rte_errno before cleanup. */
 195         /* Rollback. */
 196         dev->data->dev_started = 0;
 197         mlx5_flow_stop(dev, &priv->flows);
 198         mlx5_traffic_disable(dev);
 199         mlx5_txq_stop(dev);
 200         mlx5_rxq_stop(dev);
 201         rte_errno = ret; /* Restore rte_errno. */
 202         return -rte_errno;
 203 }
 204
 205 /**
 206  * DPDK callback to stop the device.
 207  *
 208  * Simulate device stop by detaching all configured flows.
 209  *
 210  * @param dev
 211  *   Pointer to Ethernet device structure.
 212  */
 213 void
 214 mlx5_dev_stop(struct rte_eth_dev *dev)
 215 {
 216         struct priv *priv = dev->data->dev_private;
 217
 218         dev->data->dev_started = 0;
 219         /* Prevent crashes when queues are still in use. */
 220         dev->rx_pkt_burst = removed_rx_burst;
 221         dev->tx_pkt_burst = removed_tx_burst;
 222         rte_wmb();
 223         usleep(1000 * priv->rxqs_n);
 224         DRV_LOG(DEBUG, "port %u cleaning up and destroying hash Rx queues",
 225                 dev->data->port_id);
 226         mlx5_flow_stop(dev, &priv->flows);
 227         mlx5_traffic_disable(dev);
 228         mlx5_rx_intr_vec_disable(dev);
 229         mlx5_dev_interrupt_handler_uninstall(dev);
 230         mlx5_txq_stop(dev);
 231         mlx5_rxq_stop(dev);
 232 }
 233
 234 /**
 235  * Enable traffic flows configured by control plane
 236  *
 237  * @param dev
 238  *   Pointer to Ethernet device private data.
 239  * @param dev
 240  *   Pointer to Ethernet device structure.
 241  *
 242  * @return
 243  *   0 on success, a negative errno value otherwise and rte_errno is set.
 244  */
 245 int
 246 mlx5_traffic_enable(struct rte_eth_dev *dev)
 247 {
 248         struct priv *priv = dev->data->dev_private;
 249         struct rte_flow_item_eth bcast = {
 250                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 251         };
 252         struct rte_flow_item_eth ipv6_multi_spec = {
 253                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 254         };
 255         struct rte_flow_item_eth ipv6_multi_mask = {
 256                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 257         };
 258         struct rte_flow_item_eth unicast = {
 259                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 260         };
 261         struct rte_flow_item_eth unicast_mask = {
 262                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 263         };
 264         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 265         const struct ether_addr cmp = {
 266                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 267         };
 268         unsigned int i;
 269         unsigned int j;
 270         int ret;
 271
 272         if (priv->isolated)
 273                 return 0;
 274         if (dev->data->promiscuous) {
 275                 struct rte_flow_item_eth promisc = {
 276                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 277                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 278                         .type = 0,
 279                 };
 280
 281                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 282                 if (ret)
 283                         goto error;
 284         }
 285         if (dev->data->all_multicast) {
 286                 struct rte_flow_item_eth multicast = {
 287                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 288                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 289                         .type = 0,
 290                 };
 291
 292                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 293                 if (ret)
 294                         goto error;
 295         } else {
 296                 /* Add broadcast/multicast flows. */
 297                 for (i = 0; i != vlan_filter_n; ++i) {
 298                         uint16_t vlan = priv->vlan_filter[i];
 299
 300                         struct rte_flow_item_vlan vlan_spec = {
 301                                 .tci = rte_cpu_to_be_16(vlan),
 302                         };
 303                         struct rte_flow_item_vlan vlan_mask =
 304                                 rte_flow_item_vlan_mask;
 305
 306                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 307                                                   &vlan_spec, &vlan_mask);
 308                         if (ret)
 309                                 goto error;
 310                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 311                                                   &ipv6_multi_mask,
 312                                                   &vlan_spec, &vlan_mask);
 313                         if (ret)
 314                                 goto error;
 315                 }
 316                 if (!vlan_filter_n) {
 317                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 318                         if (ret)
 319                                 goto error;
 320                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 321                                              &ipv6_multi_mask);
 322                         if (ret)
 323                                 goto error;
 324                 }
 325         }
 326         /* Add MAC address flows. */
 327         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 328                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 329
 330                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 331                         continue;
 332                 memcpy(&unicast.dst.addr_bytes,
 333                        mac->addr_bytes,
 334                        ETHER_ADDR_LEN);
 335                 for (j = 0; j != vlan_filter_n; ++j) {
 336                         uint16_t vlan = priv->vlan_filter[j];
 337
 338                         struct rte_flow_item_vlan vlan_spec = {
 339                                 .tci = rte_cpu_to_be_16(vlan),
 340                         };
 341                         struct rte_flow_item_vlan vlan_mask =
 342                                 rte_flow_item_vlan_mask;
 343
 344                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 345                                                   &unicast_mask,
 346                                                   &vlan_spec,
 347                                                   &vlan_mask);
 348                         if (ret)
 349                                 goto error;
 350                 }
 351                 if (!vlan_filter_n) {
 352                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 353                         if (ret)
 354                                 goto error;
 355                 }
 356         }
 357         return 0;
 358 error:
 359         ret = rte_errno; /* Save rte_errno before cleanup. */
 360         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 361         rte_errno = ret; /* Restore rte_errno. */
 362         return -rte_errno;
 363 }
 364
 365
 366 /**
 367  * Disable traffic flows configured by control plane
 368  *
 369  * @param dev
 370  *   Pointer to Ethernet device private data.
 371  */
 372 void
 373 mlx5_traffic_disable(struct rte_eth_dev *dev)
 374 {
 375         struct priv *priv = dev->data->dev_private;
 376
 377         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 378 }
 379
 380 /**
 381  * Restart traffic flows configured by control plane
 382  *
 383  * @param dev
 384  *   Pointer to Ethernet device private data.
 385  *
 386  * @return
 387  *   0 on success, a negative errno value otherwise and rte_errno is set.
 388  */
 389 int
 390 mlx5_traffic_restart(struct rte_eth_dev *dev)
 391 {
 392         if (dev->data->dev_started) {
 393                 mlx5_traffic_disable(dev);
 394                 return mlx5_traffic_enable(dev);
 395         }
 396         return 0;
 397 }